/* asn.c * * Copyright (C) 2006-2015 wolfSSL Inc. * * This file is part of wolfSSL. (formerly known as CyaSSL) * * wolfSSL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * wolfSSL is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ #ifdef HAVE_CONFIG_H #include #endif #include #ifndef NO_ASN #ifdef HAVE_RTP_SYS #include "os.h" /* dc_rtc_api needs */ #include "dc_rtc_api.h" /* to get current time */ #endif #include #include //#include #include #include #include #include #include #include #include #ifndef NO_RC4 #include #endif #ifdef HAVE_NTRU #include "libntruencrypt/ntru_crypto.h" #endif #if defined(WOLFSSL_SHA512) || defined(WOLFSSL_SHA384) #include #endif #ifndef NO_SHA256 #include #endif #ifdef HAVE_ECC #include #endif #ifdef WOLFSSL_DEBUG_ENCODING #if defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) #if MQX_USE_IO_OLD #include #else #include #endif #else #include #endif #endif #ifdef _MSC_VER /* 4996 warning to use MS extensions e.g., strcpy_s instead of XSTRNCPY */ #pragma warning(disable: 4996) #endif #ifndef TRUE #define TRUE 1 #endif #ifndef FALSE #define FALSE 0 #endif #ifdef HAVE_RTP_SYS /* uses parital structures */ #define XTIME(tl) (0) #define XGMTIME(c, t) my_gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #elif defined(MICRIUM) #if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED) #define XVALIDATE_DATE(d,f,t) NetSecure_ValidateDateHandler((d),(f),(t)) #else #define XVALIDATE_DATE(d, f, t) (0) #endif #define NO_TIME_H /* since Micrium not defining XTIME or XGMTIME, CERT_GEN not available */ #elif defined(MICROCHIP_TCPIP_V5) || defined(MICROCHIP_TCPIP) #include #define XTIME(t1) pic32_time((t1)) #define XGMTIME(c, t) gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #elif defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) #define XTIME(t1) mqx_time((t1)) #define XGMTIME(c, t) mqx_gmtime((c), (t)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #elif defined(FREESCALE_KSDK_BM) #include #define XTIME(t1) ksdk_time((t1)) #define XGMTIME(c, t) gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #elif defined(USER_TIME) /* user time, and gmtime compatible functions, there is a gmtime implementation here that WINCE uses, so really just need some ticks since the EPOCH */ struct tm { int tm_sec; /* seconds after the minute [0-60] */ int tm_min; /* minutes after the hour [0-59] */ int tm_hour; /* hours since midnight [0-23] */ int tm_mday; /* day of the month [1-31] */ int tm_mon; /* months since January [0-11] */ int tm_year; /* years since 1900 */ int tm_wday; /* days since Sunday [0-6] */ int tm_yday; /* days since January 1 [0-365] */ int tm_isdst; /* Daylight Savings Time flag */ long tm_gmtoff; /* offset from CUT in seconds */ char *tm_zone; /* timezone abbreviation */ }; typedef long time_t; /* forward declaration */ struct tm* gmtime(const time_t* timer); extern time_t XTIME(time_t * timer); #define XGMTIME(c, t) gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #ifdef STACK_TRAP /* for stack trap tracking, don't call os gmtime on OS X/linux, uses a lot of stack spce */ extern time_t time(time_t * timer); #define XTIME(tl) time((tl)) #endif /* STACK_TRAP */ #elif defined(TIME_OVERRIDES) /* user would like to override time() and gmtime() functionality */ #ifndef HAVE_TIME_T_TYPE typedef long time_t; #endif extern time_t XTIME(time_t * timer); #ifndef HAVE_TM_TYPE struct tm { int tm_sec; /* seconds after the minute [0-60] */ int tm_min; /* minutes after the hour [0-59] */ int tm_hour; /* hours since midnight [0-23] */ int tm_mday; /* day of the month [1-31] */ int tm_mon; /* months since January [0-11] */ int tm_year; /* years since 1900 */ int tm_wday; /* days since Sunday [0-6] */ int tm_yday; /* days since January 1 [0-365] */ int tm_isdst; /* Daylight Savings Time flag */ long tm_gmtoff; /* offset from CUT in seconds */ char *tm_zone; /* timezone abbreviation */ }; #endif extern struct tm* XGMTIME(const time_t* timer, struct tm* tmp); #ifndef HAVE_VALIDATE_DATE #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #endif #elif defined(IDIRECT_DEV_TIME) /*Gets the timestamp from cloak software owned by VT iDirect in place of time() from */ #include #define XTIME(t1) idirect_time((t1)) #define XGMTIME(c) gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #else /* default */ /* uses complete facility */ #include #define XTIME(tl) time((tl)) #define XGMTIME(c, t) gmtime((c)) #define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t)) #endif #ifdef _WIN32_WCE /* no time() or gmtime() even though in time.h header?? */ #include time_t time(time_t* timer) { SYSTEMTIME sysTime; FILETIME fTime; ULARGE_INTEGER intTime; time_t localTime; if (timer == NULL) timer = &localTime; GetSystemTime(&sysTime); SystemTimeToFileTime(&sysTime, &fTime); XMEMCPY(&intTime, &fTime, sizeof(FILETIME)); /* subtract EPOCH */ intTime.QuadPart -= 0x19db1ded53e8000; /* to secs */ intTime.QuadPart /= 10000000; *timer = (time_t)intTime.QuadPart; return *timer; } #endif /* _WIN32_WCE */ #if defined( _WIN32_WCE ) || defined( USER_TIME ) struct tm* gmtime(const time_t* timer) { #define YEAR0 1900 #define EPOCH_YEAR 1970 #define SECS_DAY (24L * 60L * 60L) #define LEAPYEAR(year) (!((year) % 4) && (((year) % 100) || !((year) %400))) #define YEARSIZE(year) (LEAPYEAR(year) ? 366 : 365) static const int _ytab[2][12] = { {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; static struct tm st_time; struct tm* ret = &st_time; time_t secs = *timer; unsigned long dayclock, dayno; int year = EPOCH_YEAR; dayclock = (unsigned long)secs % SECS_DAY; dayno = (unsigned long)secs / SECS_DAY; ret->tm_sec = (int) dayclock % 60; ret->tm_min = (int)(dayclock % 3600) / 60; ret->tm_hour = (int) dayclock / 3600; ret->tm_wday = (int) (dayno + 4) % 7; /* day 0 a Thursday */ while(dayno >= (unsigned long)YEARSIZE(year)) { dayno -= YEARSIZE(year); year++; } ret->tm_year = year - YEAR0; ret->tm_yday = (int)dayno; ret->tm_mon = 0; while(dayno >= (unsigned long)_ytab[LEAPYEAR(year)][ret->tm_mon]) { dayno -= _ytab[LEAPYEAR(year)][ret->tm_mon]; ret->tm_mon++; } ret->tm_mday = (int)++dayno; ret->tm_isdst = 0; return ret; } #endif /* _WIN32_WCE || USER_TIME */ #ifdef HAVE_RTP_SYS #define YEAR0 1900 struct tm* my_gmtime(const time_t* timer) /* has a gmtime() but hangs */ { static struct tm st_time; struct tm* ret = &st_time; DC_RTC_CALENDAR cal; dc_rtc_time_get(&cal, TRUE); ret->tm_year = cal.year - YEAR0; /* gm starts at 1900 */ ret->tm_mon = cal.month - 1; /* gm starts at 0 */ ret->tm_mday = cal.day; ret->tm_hour = cal.hour; ret->tm_min = cal.minute; ret->tm_sec = cal.second; return ret; } #endif /* HAVE_RTP_SYS */ #if defined(MICROCHIP_TCPIP_V5) || defined(MICROCHIP_TCPIP) /* * time() is just a stub in Microchip libraries. We need our own * implementation. Use SNTP client to get seconds since epoch. */ time_t pic32_time(time_t* timer) { #ifdef MICROCHIP_TCPIP_V5 DWORD sec = 0; #else uint32_t sec = 0; #endif time_t localTime; if (timer == NULL) timer = &localTime; #ifdef MICROCHIP_MPLAB_HARMONY sec = TCPIP_SNTP_UTCSecondsGet(); #else sec = SNTPGetUTCSeconds(); #endif *timer = (time_t) sec; return *timer; } #endif /* MICROCHIP_TCPIP */ #if defined(FREESCALE_MQX) || defined(FREESCALE_KSDK_MQX) time_t mqx_time(time_t* timer) { time_t localTime; TIME_STRUCT time_s; if (timer == NULL) timer = &localTime; _time_get(&time_s); *timer = (time_t) time_s.SECONDS; return *timer; } /* CodeWarrior GCC toolchain only has gmtime_r(), no gmtime() */ struct tm* mqx_gmtime(const time_t* clock, struct tm* tmpTime) { return gmtime_r(clock, tmpTime); } #endif /* FREESCALE_MQX */ #ifdef FREESCALE_KSDK_BM /* setting for PIT timer */ #define PIT_INSTANCE 0 #define PIT_CHANNEL 0 #include "fsl_pit_driver.h" time_t ksdk_time(time_t* timer) { time_t localTime; if (timer == NULL) timer = &localTime; *timer = (PIT_DRV_ReadTimerUs(PIT_INSTANCE, PIT_CHANNEL)) / 1000000; return *timer; } #endif /* FREESCALE_KSDK_BM */ #ifdef WOLFSSL_TIRTOS time_t XTIME(time_t * timer) { time_t sec = 0; sec = (time_t) Seconds_get(); if (timer != NULL) *timer = sec; return sec; } #endif /* WOLFSSL_TIRTOS */ static INLINE word32 btoi(byte b) { return b - 0x30; } /* two byte date/time, add to value */ static INLINE void GetTime(int* value, const byte* date, int* idx) { int i = *idx; *value += btoi(date[i++]) * 10; *value += btoi(date[i++]); *idx = i; } #if defined(MICRIUM) CPU_INT32S NetSecure_ValidateDateHandler(CPU_INT08U *date, CPU_INT08U format, CPU_INT08U dateType) { CPU_BOOLEAN rtn_code; CPU_INT32S i; CPU_INT32S val; CPU_INT16U year; CPU_INT08U month; CPU_INT16U day; CPU_INT08U hour; CPU_INT08U min; CPU_INT08U sec; i = 0; year = 0u; if (format == ASN_UTC_TIME) { if (btoi(date[0]) >= 5) year = 1900; else year = 2000; } else { /* format == GENERALIZED_TIME */ year += btoi(date[i++]) * 1000; year += btoi(date[i++]) * 100; } val = year; GetTime(&val, date, &i); year = (CPU_INT16U)val; val = 0; GetTime(&val, date, &i); month = (CPU_INT08U)val; val = 0; GetTime(&val, date, &i); day = (CPU_INT16U)val; val = 0; GetTime(&val, date, &i); hour = (CPU_INT08U)val; val = 0; GetTime(&val, date, &i); min = (CPU_INT08U)val; val = 0; GetTime(&val, date, &i); sec = (CPU_INT08U)val; return NetSecure_ValidateDate(year, month, day, hour, min, sec, dateType); } #endif /* MICRIUM */ #if defined(IDIRECT_DEV_TIME) extern time_t getTimestamp(); time_t idirect_time(time_t * timer) { time_t sec = getTimestamp(); if (timer != NULL) *timer = sec; return sec; } #endif WOLFSSL_LOCAL int GetLength(const byte* input, word32* inOutIdx, int* len, word32 maxIdx) { int length = 0; word32 i = *inOutIdx; byte b; *len = 0; /* default length */ if ( (i+1) > maxIdx) { /* for first read */ WOLFSSL_MSG("GetLength bad index on input"); return BUFFER_E; } b = input[i++]; if (b >= ASN_LONG_LENGTH) { word32 bytes = b & 0x7F; if ( (i+bytes) > maxIdx) { /* for reading bytes */ WOLFSSL_MSG("GetLength bad long length"); return BUFFER_E; } while (bytes--) { b = input[i++]; length = (length << 8) | b; } } else length = b; if ( (i+length) > maxIdx) { /* for user of length */ WOLFSSL_MSG("GetLength value exceeds buffer length"); return BUFFER_E; } *inOutIdx = i; if (length > 0) *len = length; return length; } WOLFSSL_LOCAL int GetSequence(const byte* input, word32* inOutIdx, int* len, word32 maxIdx) { int length = -1; word32 idx = *inOutIdx; if (input[idx++] != (ASN_SEQUENCE | ASN_CONSTRUCTED) || GetLength(input, &idx, &length, maxIdx) < 0) return ASN_PARSE_E; *len = length; *inOutIdx = idx; return length; } WOLFSSL_LOCAL int GetSet(const byte* input, word32* inOutIdx, int* len, word32 maxIdx) { int length = -1; word32 idx = *inOutIdx; if (input[idx++] != (ASN_SET | ASN_CONSTRUCTED) || GetLength(input, &idx, &length, maxIdx) < 0) return ASN_PARSE_E; *len = length; *inOutIdx = idx; return length; } /* winodws header clash for WinCE using GetVersion */ WOLFSSL_LOCAL int GetMyVersion(const byte* input, word32* inOutIdx, int* version) { word32 idx = *inOutIdx; WOLFSSL_ENTER("GetMyVersion"); if (input[idx++] != ASN_INTEGER) return ASN_PARSE_E; if (input[idx++] != 0x01) return ASN_VERSION_E; *version = input[idx++]; *inOutIdx = idx; return *version; } #ifndef NO_PWDBASED /* Get small count integer, 32 bits or less */ static int GetShortInt(const byte* input, word32* inOutIdx, int* number) { word32 idx = *inOutIdx; word32 len; *number = 0; if (input[idx++] != ASN_INTEGER) return ASN_PARSE_E; len = input[idx++]; if (len > 4) return ASN_PARSE_E; while (len--) { *number = *number << 8 | input[idx++]; } *inOutIdx = idx; return *number; } #endif /* !NO_PWDBASED */ /* May not have one, not an error */ static int GetExplicitVersion(const byte* input, word32* inOutIdx, int* version) { word32 idx = *inOutIdx; WOLFSSL_ENTER("GetExplicitVersion"); if (input[idx++] == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED)) { *inOutIdx = ++idx; /* eat header */ return GetMyVersion(input, inOutIdx, version); } /* go back as is */ *version = 0; return 0; } WOLFSSL_LOCAL int GetInt(mp_int* mpi, const byte* input, word32* inOutIdx, word32 maxIdx) { word32 i = *inOutIdx; byte b = input[i++]; int length; if (b != ASN_INTEGER) return ASN_PARSE_E; if (GetLength(input, &i, &length, maxIdx) < 0) return ASN_PARSE_E; if ( (b = input[i++]) == 0x00) length--; else i--; if (mp_init(mpi) != MP_OKAY) return MP_INIT_E; if (mp_read_unsigned_bin(mpi, (byte*)input + i, length) != 0) { mp_clear(mpi); return ASN_GETINT_E; } *inOutIdx = i + length; return 0; } static int GetObjectId(const byte* input, word32* inOutIdx, word32* oid, word32 maxIdx) { int length; word32 i = *inOutIdx; byte b; *oid = 0; b = input[i++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(input, &i, &length, maxIdx) < 0) return ASN_PARSE_E; while(length--) *oid += input[i++]; /* just sum it up for now */ *inOutIdx = i; return 0; } WOLFSSL_LOCAL int GetAlgoId(const byte* input, word32* inOutIdx, word32* oid, word32 maxIdx) { int length; word32 i = *inOutIdx; byte b; *oid = 0; WOLFSSL_ENTER("GetAlgoId"); if (GetSequence(input, &i, &length, maxIdx) < 0) return ASN_PARSE_E; b = input[i++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(input, &i, &length, maxIdx) < 0) return ASN_PARSE_E; while(length--) { /* odd HC08 compiler behavior here when input[i++] */ *oid += input[i]; i++; } /* just sum it up for now */ /* could have NULL tag and 0 terminator, but may not */ b = input[i++]; if (b == ASN_TAG_NULL) { b = input[i++]; if (b != 0) return ASN_EXPECT_0_E; } else /* go back, didn't have it */ i--; *inOutIdx = i; return 0; } #ifndef NO_RSA #ifdef HAVE_CAVIUM static int GetCaviumInt(byte** buff, word16* buffSz, const byte* input, word32* inOutIdx, word32 maxIdx, void* heap) { word32 i = *inOutIdx; byte b = input[i++]; int length; if (b != ASN_INTEGER) return ASN_PARSE_E; if (GetLength(input, &i, &length, maxIdx) < 0) return ASN_PARSE_E; if ( (b = input[i++]) == 0x00) length--; else i--; *buffSz = (word16)length; *buff = XMALLOC(*buffSz, heap, DYNAMIC_TYPE_CAVIUM_RSA); if (*buff == NULL) return MEMORY_E; XMEMCPY(*buff, input + i, *buffSz); *inOutIdx = i + length; return 0; } static int CaviumRsaPrivateKeyDecode(const byte* input, word32* inOutIdx, RsaKey* key, word32 inSz) { int version, length; void* h = key->heap; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetMyVersion(input, inOutIdx, &version) < 0) return ASN_PARSE_E; key->type = RSA_PRIVATE; if (GetCaviumInt(&key->c_n, &key->c_nSz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_e, &key->c_eSz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_d, &key->c_dSz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_p, &key->c_pSz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_q, &key->c_qSz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_dP, &key->c_dP_Sz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_dQ, &key->c_dQ_Sz, input, inOutIdx, inSz, h) < 0 || GetCaviumInt(&key->c_u, &key->c_uSz, input, inOutIdx, inSz, h) < 0 ) return ASN_RSA_KEY_E; return 0; } #endif /* HAVE_CAVIUM */ #ifndef HAVE_USER_RSA int wc_RsaPrivateKeyDecode(const byte* input, word32* inOutIdx, RsaKey* key, word32 inSz) { int version, length; #ifdef HAVE_CAVIUM if (key->magic == WOLFSSL_RSA_CAVIUM_MAGIC) return CaviumRsaPrivateKeyDecode(input, inOutIdx, key, inSz); #endif if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetMyVersion(input, inOutIdx, &version) < 0) return ASN_PARSE_E; key->type = RSA_PRIVATE; if (GetInt(&key->n, input, inOutIdx, inSz) < 0 || GetInt(&key->e, input, inOutIdx, inSz) < 0 || GetInt(&key->d, input, inOutIdx, inSz) < 0 || GetInt(&key->p, input, inOutIdx, inSz) < 0 || GetInt(&key->q, input, inOutIdx, inSz) < 0 || GetInt(&key->dP, input, inOutIdx, inSz) < 0 || GetInt(&key->dQ, input, inOutIdx, inSz) < 0 || GetInt(&key->u, input, inOutIdx, inSz) < 0 ) return ASN_RSA_KEY_E; return 0; } #endif /* HAVE_USER_RSA */ #endif /* NO_RSA */ /* Remove PKCS8 header, move beginning of traditional to beginning of input */ int ToTraditional(byte* input, word32 sz) { word32 inOutIdx = 0, oid; int version, length; if (GetSequence(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; if (GetMyVersion(input, &inOutIdx, &version) < 0) return ASN_PARSE_E; if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0) return ASN_PARSE_E; if (input[inOutIdx] == ASN_OBJECT_ID) { /* pkcs8 ecc uses slightly different format */ inOutIdx++; /* past id */ if (GetLength(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; inOutIdx += length; /* over sub id, key input will verify */ } if (input[inOutIdx++] != ASN_OCTET_STRING) return ASN_PARSE_E; if (GetLength(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; XMEMMOVE(input, input + inOutIdx, length); return length; } #ifndef NO_PWDBASED /* Check To see if PKCS version algo is supported, set id if it is return 0 < 0 on error */ static int CheckAlgo(int first, int second, int* id, int* version) { *id = ALGO_ID_E; *version = PKCS5; /* default */ if (first == 1) { switch (second) { case 1: *id = PBE_SHA1_RC4_128; *version = PKCS12; return 0; case 3: *id = PBE_SHA1_DES3; *version = PKCS12; return 0; default: return ALGO_ID_E; } } if (first != PKCS5) return ASN_INPUT_E; /* VERSION ERROR */ if (second == PBES2) { *version = PKCS5v2; return 0; } switch (second) { case 3: /* see RFC 2898 for ids */ *id = PBE_MD5_DES; return 0; case 10: *id = PBE_SHA1_DES; return 0; default: return ALGO_ID_E; } } /* Check To see if PKCS v2 algo is supported, set id if it is return 0 < 0 on error */ static int CheckAlgoV2(int oid, int* id) { switch (oid) { case 69: *id = PBE_SHA1_DES; return 0; case 652: *id = PBE_SHA1_DES3; return 0; default: return ALGO_ID_E; } } /* Decrypt intput in place from parameters based on id */ static int DecryptKey(const char* password, int passwordSz, byte* salt, int saltSz, int iterations, int id, byte* input, int length, int version, byte* cbcIv) { int typeH; int derivedLen; int decryptionType; int ret = 0; #ifdef WOLFSSL_SMALL_STACK byte* key; #else byte key[MAX_KEY_SIZE]; #endif (void)input; (void)length; switch (id) { case PBE_MD5_DES: typeH = MD5; derivedLen = 16; /* may need iv for v1.5 */ decryptionType = DES_TYPE; break; case PBE_SHA1_DES: typeH = SHA; derivedLen = 16; /* may need iv for v1.5 */ decryptionType = DES_TYPE; break; case PBE_SHA1_DES3: typeH = SHA; derivedLen = 32; /* may need iv for v1.5 */ decryptionType = DES3_TYPE; break; case PBE_SHA1_RC4_128: typeH = SHA; derivedLen = 16; decryptionType = RC4_TYPE; break; default: return ALGO_ID_E; } #ifdef WOLFSSL_SMALL_STACK key = (byte*)XMALLOC(MAX_KEY_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (key == NULL) return MEMORY_E; #endif if (version == PKCS5v2) ret = wc_PBKDF2(key, (byte*)password, passwordSz, salt, saltSz, iterations, derivedLen, typeH); #ifndef NO_SHA else if (version == PKCS5) ret = wc_PBKDF1(key, (byte*)password, passwordSz, salt, saltSz, iterations, derivedLen, typeH); #endif else if (version == PKCS12) { int i, idx = 0; byte unicodePasswd[MAX_UNICODE_SZ]; if ( (passwordSz * 2 + 2) > (int)sizeof(unicodePasswd)) { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return UNICODE_SIZE_E; } for (i = 0; i < passwordSz; i++) { unicodePasswd[idx++] = 0x00; unicodePasswd[idx++] = (byte)password[i]; } /* add trailing NULL */ unicodePasswd[idx++] = 0x00; unicodePasswd[idx++] = 0x00; ret = wc_PKCS12_PBKDF(key, unicodePasswd, idx, salt, saltSz, iterations, derivedLen, typeH, 1); if (decryptionType != RC4_TYPE) ret += wc_PKCS12_PBKDF(cbcIv, unicodePasswd, idx, salt, saltSz, iterations, 8, typeH, 2); } else { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ALGO_ID_E; } if (ret != 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } switch (decryptionType) { #ifndef NO_DES3 case DES_TYPE: { Des dec; byte* desIv = key + 8; if (version == PKCS5v2 || version == PKCS12) desIv = cbcIv; ret = wc_Des_SetKey(&dec, key, desIv, DES_DECRYPTION); if (ret != 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } wc_Des_CbcDecrypt(&dec, input, input, length); break; } case DES3_TYPE: { Des3 dec; byte* desIv = key + 24; if (version == PKCS5v2 || version == PKCS12) desIv = cbcIv; ret = wc_Des3_SetKey(&dec, key, desIv, DES_DECRYPTION); if (ret != 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } ret = wc_Des3_CbcDecrypt(&dec, input, input, length); if (ret != 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } break; } #endif #ifndef NO_RC4 case RC4_TYPE: { Arc4 dec; wc_Arc4SetKey(&dec, key, derivedLen); wc_Arc4Process(&dec, input, input, length); break; } #endif default: #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ALGO_ID_E; } #ifdef WOLFSSL_SMALL_STACK XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return 0; } /* Remove Encrypted PKCS8 header, move beginning of traditional to beginning of input */ int ToTraditionalEnc(byte* input, word32 sz,const char* password,int passwordSz) { word32 inOutIdx = 0, oid; int first, second, length, version, saltSz, id; int iterations = 0; #ifdef WOLFSSL_SMALL_STACK byte* salt = NULL; byte* cbcIv = NULL; #else byte salt[MAX_SALT_SIZE]; byte cbcIv[MAX_IV_SIZE]; #endif if (GetSequence(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0) return ASN_PARSE_E; first = input[inOutIdx - 2]; /* PKCS version alwyas 2nd to last byte */ second = input[inOutIdx - 1]; /* version.algo, algo id last byte */ if (CheckAlgo(first, second, &id, &version) < 0) return ASN_INPUT_E; /* Algo ID error */ if (version == PKCS5v2) { if (GetSequence(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0) return ASN_PARSE_E; if (oid != PBKDF2_OID) return ASN_PARSE_E; } if (GetSequence(input, &inOutIdx, &length, sz) < 0) return ASN_PARSE_E; if (input[inOutIdx++] != ASN_OCTET_STRING) return ASN_PARSE_E; if (GetLength(input, &inOutIdx, &saltSz, sz) < 0) return ASN_PARSE_E; if (saltSz > MAX_SALT_SIZE) return ASN_PARSE_E; #ifdef WOLFSSL_SMALL_STACK salt = (byte*)XMALLOC(MAX_SALT_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (salt == NULL) return MEMORY_E; #endif XMEMCPY(salt, &input[inOutIdx], saltSz); inOutIdx += saltSz; if (GetShortInt(input, &inOutIdx, &iterations) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } #ifdef WOLFSSL_SMALL_STACK cbcIv = (byte*)XMALLOC(MAX_IV_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (cbcIv == NULL) { XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #endif if (version == PKCS5v2) { /* get encryption algo */ if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } if (CheckAlgoV2(oid, &id) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; /* PKCS v2 algo id error */ } if (input[inOutIdx++] != ASN_OCTET_STRING) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } if (GetLength(input, &inOutIdx, &length, sz) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } XMEMCPY(cbcIv, &input[inOutIdx], length); inOutIdx += length; } if (input[inOutIdx++] != ASN_OCTET_STRING) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } if (GetLength(input, &inOutIdx, &length, sz) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } if (DecryptKey(password, passwordSz, salt, saltSz, iterations, id, input + inOutIdx, length, version, cbcIv) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_INPUT_E; /* decrypt failure */ } #ifdef WOLFSSL_SMALL_STACK XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif XMEMMOVE(input, input + inOutIdx, length); return ToTraditional(input, length); } #endif /* NO_PWDBASED */ #ifndef NO_RSA #ifndef HAVE_USER_RSA int wc_RsaPublicKeyDecode(const byte* input, word32* inOutIdx, RsaKey* key, word32 inSz) { int length; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; key->type = RSA_PUBLIC; #if defined(OPENSSL_EXTRA) || defined(RSA_DECODE_EXTRA) { byte b = input[*inOutIdx]; if (b != ASN_INTEGER) { /* not from decoded cert, will have algo id, skip past */ if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; b = input[(*inOutIdx)++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; *inOutIdx += length; /* skip past */ /* could have NULL tag and 0 terminator, but may not */ b = input[(*inOutIdx)++]; if (b == ASN_TAG_NULL) { b = input[(*inOutIdx)++]; if (b != 0) return ASN_EXPECT_0_E; } else /* go back, didn't have it */ (*inOutIdx)--; /* should have bit tag length and seq next */ b = input[(*inOutIdx)++]; if (b != ASN_BIT_STRING) return ASN_BITSTR_E; if (GetLength(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; /* could have 0 */ b = input[(*inOutIdx)++]; if (b != 0) (*inOutIdx)--; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; } /* end if */ } /* openssl var block */ #endif /* OPENSSL_EXTRA */ if (GetInt(&key->n, input, inOutIdx, inSz) < 0 || GetInt(&key->e, input, inOutIdx, inSz) < 0 ) return ASN_RSA_KEY_E; return 0; } /* import RSA public key elements (n, e) into RsaKey structure (key) */ int wc_RsaPublicKeyDecodeRaw(const byte* n, word32 nSz, const byte* e, word32 eSz, RsaKey* key) { if (n == NULL || e == NULL || key == NULL) return BAD_FUNC_ARG; key->type = RSA_PUBLIC; if (mp_init(&key->n) != MP_OKAY) return MP_INIT_E; if (mp_read_unsigned_bin(&key->n, n, nSz) != 0) { mp_clear(&key->n); return ASN_GETINT_E; } if (mp_init(&key->e) != MP_OKAY) { mp_clear(&key->n); return MP_INIT_E; } if (mp_read_unsigned_bin(&key->e, e, eSz) != 0) { mp_clear(&key->n); mp_clear(&key->e); return ASN_GETINT_E; } return 0; } #endif /* HAVE_USER_RSA */ #endif #ifndef NO_DH int wc_DhKeyDecode(const byte* input, word32* inOutIdx, DhKey* key, word32 inSz) { int length; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetInt(&key->p, input, inOutIdx, inSz) < 0 || GetInt(&key->g, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E; return 0; } int wc_DhParamsLoad(const byte* input, word32 inSz, byte* p, word32* pInOutSz, byte* g, word32* gInOutSz) { word32 i = 0; byte b; int length; if (GetSequence(input, &i, &length, inSz) < 0) return ASN_PARSE_E; b = input[i++]; if (b != ASN_INTEGER) return ASN_PARSE_E; if (GetLength(input, &i, &length, inSz) < 0) return ASN_PARSE_E; if ( (b = input[i++]) == 0x00) length--; else i--; if (length <= (int)*pInOutSz) { XMEMCPY(p, &input[i], length); *pInOutSz = length; } else return BUFFER_E; i += length; b = input[i++]; if (b != ASN_INTEGER) return ASN_PARSE_E; if (GetLength(input, &i, &length, inSz) < 0) return ASN_PARSE_E; if (length <= (int)*gInOutSz) { XMEMCPY(g, &input[i], length); *gInOutSz = length; } else return BUFFER_E; return 0; } #endif /* NO_DH */ #ifndef NO_DSA int DsaPublicKeyDecode(const byte* input, word32* inOutIdx, DsaKey* key, word32 inSz) { int length; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetInt(&key->p, input, inOutIdx, inSz) < 0 || GetInt(&key->q, input, inOutIdx, inSz) < 0 || GetInt(&key->g, input, inOutIdx, inSz) < 0 || GetInt(&key->y, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E; key->type = DSA_PUBLIC; return 0; } int DsaPrivateKeyDecode(const byte* input, word32* inOutIdx, DsaKey* key, word32 inSz) { int length, version; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetMyVersion(input, inOutIdx, &version) < 0) return ASN_PARSE_E; if (GetInt(&key->p, input, inOutIdx, inSz) < 0 || GetInt(&key->q, input, inOutIdx, inSz) < 0 || GetInt(&key->g, input, inOutIdx, inSz) < 0 || GetInt(&key->y, input, inOutIdx, inSz) < 0 || GetInt(&key->x, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E; key->type = DSA_PRIVATE; return 0; } static mp_int* GetDsaInt(DsaKey* key, int idx) { if (idx == 0) return &key->p; if (idx == 1) return &key->q; if (idx == 2) return &key->g; if (idx == 3) return &key->y; if (idx == 4) return &key->x; return NULL; } /* Release Tmp DSA resources */ static INLINE void FreeTmpDsas(byte** tmps) { int i; for (i = 0; i < DSA_INTS; i++) XFREE(tmps[i], NULL, DYNAMIC_TYPE_DSA); } /* Convert DsaKey key to DER format, write to output (inLen), return bytes written */ int wc_DsaKeyToDer(DsaKey* key, byte* output, word32 inLen) { word32 seqSz, verSz, rawLen, intTotalLen = 0; word32 sizes[DSA_INTS]; int i, j, outLen, ret = 0, lbit; byte seq[MAX_SEQ_SZ]; byte ver[MAX_VERSION_SZ]; byte* tmps[DSA_INTS]; if (!key || !output) return BAD_FUNC_ARG; if (key->type != DSA_PRIVATE) return BAD_FUNC_ARG; for (i = 0; i < DSA_INTS; i++) tmps[i] = NULL; /* write all big ints from key to DER tmps */ for (i = 0; i < DSA_INTS; i++) { mp_int* keyInt = GetDsaInt(key, i); /* leading zero */ if ((mp_count_bits(keyInt) & 7) == 0 || mp_iszero(keyInt) == MP_YES) lbit = 1; else lbit = 0; rawLen = mp_unsigned_bin_size(keyInt) + lbit; tmps[i] = (byte*)XMALLOC(rawLen + MAX_SEQ_SZ, NULL, DYNAMIC_TYPE_DSA); if (tmps[i] == NULL) { ret = MEMORY_E; break; } tmps[i][0] = ASN_INTEGER; sizes[i] = SetLength(rawLen, tmps[i] + 1) + 1 + lbit; /* tag & lbit */ if (sizes[i] <= MAX_SEQ_SZ) { int err; /* leading zero */ if (lbit) tmps[i][sizes[i]-1] = 0x00; err = mp_to_unsigned_bin(keyInt, tmps[i] + sizes[i]); if (err == MP_OKAY) { sizes[i] += (rawLen-lbit); /* lbit included in rawLen */ intTotalLen += sizes[i]; } else { ret = err; break; } } else { ret = ASN_INPUT_E; break; } } if (ret != 0) { FreeTmpDsas(tmps); return ret; } /* make headers */ verSz = SetMyVersion(0, ver, FALSE); seqSz = SetSequence(verSz + intTotalLen, seq); outLen = seqSz + verSz + intTotalLen; if (outLen > (int)inLen) return BAD_FUNC_ARG; /* write to output */ XMEMCPY(output, seq, seqSz); j = seqSz; XMEMCPY(output + j, ver, verSz); j += verSz; for (i = 0; i < DSA_INTS; i++) { XMEMCPY(output + j, tmps[i], sizes[i]); j += sizes[i]; } FreeTmpDsas(tmps); return outLen; } #endif /* NO_DSA */ void InitDecodedCert(DecodedCert* cert, byte* source, word32 inSz, void* heap) { cert->publicKey = 0; cert->pubKeySize = 0; cert->pubKeyStored = 0; cert->version = 0; cert->signature = 0; cert->subjectCN = 0; cert->subjectCNLen = 0; cert->subjectCNEnc = CTC_UTF8; cert->subjectCNStored = 0; cert->weOwnAltNames = 0; cert->altNames = NULL; #ifndef IGNORE_NAME_CONSTRAINTS cert->altEmailNames = NULL; cert->permittedNames = NULL; cert->excludedNames = NULL; #endif /* IGNORE_NAME_CONSTRAINTS */ cert->issuer[0] = '\0'; cert->subject[0] = '\0'; cert->source = source; /* don't own */ cert->srcIdx = 0; cert->maxIdx = inSz; /* can't go over this index */ cert->heap = heap; XMEMSET(cert->serial, 0, EXTERNAL_SERIAL_SIZE); cert->serialSz = 0; cert->extensions = 0; cert->extensionsSz = 0; cert->extensionsIdx = 0; cert->extAuthInfo = NULL; cert->extAuthInfoSz = 0; cert->extCrlInfo = NULL; cert->extCrlInfoSz = 0; XMEMSET(cert->extSubjKeyId, 0, KEYID_SIZE); cert->extSubjKeyIdSet = 0; XMEMSET(cert->extAuthKeyId, 0, KEYID_SIZE); cert->extAuthKeyIdSet = 0; cert->extKeyUsageSet = 0; cert->extKeyUsage = 0; cert->extExtKeyUsageSet = 0; cert->extExtKeyUsage = 0; cert->isCA = 0; #ifdef HAVE_PKCS7 cert->issuerRaw = NULL; cert->issuerRawLen = 0; #endif #ifdef WOLFSSL_CERT_GEN cert->subjectSN = 0; cert->subjectSNLen = 0; cert->subjectSNEnc = CTC_UTF8; cert->subjectC = 0; cert->subjectCLen = 0; cert->subjectCEnc = CTC_PRINTABLE; cert->subjectL = 0; cert->subjectLLen = 0; cert->subjectLEnc = CTC_UTF8; cert->subjectST = 0; cert->subjectSTLen = 0; cert->subjectSTEnc = CTC_UTF8; cert->subjectO = 0; cert->subjectOLen = 0; cert->subjectOEnc = CTC_UTF8; cert->subjectOU = 0; cert->subjectOULen = 0; cert->subjectOUEnc = CTC_UTF8; cert->subjectEmail = 0; cert->subjectEmailLen = 0; #endif /* WOLFSSL_CERT_GEN */ cert->beforeDate = NULL; cert->beforeDateLen = 0; cert->afterDate = NULL; cert->afterDateLen = 0; #ifdef OPENSSL_EXTRA XMEMSET(&cert->issuerName, 0, sizeof(DecodedName)); XMEMSET(&cert->subjectName, 0, sizeof(DecodedName)); cert->extBasicConstSet = 0; cert->extBasicConstCrit = 0; cert->extBasicConstPlSet = 0; cert->pathLength = 0; cert->extSubjAltNameSet = 0; cert->extSubjAltNameCrit = 0; cert->extAuthKeyIdCrit = 0; cert->extSubjKeyIdCrit = 0; cert->extKeyUsageCrit = 0; cert->extExtKeyUsageCrit = 0; cert->extExtKeyUsageSrc = NULL; cert->extExtKeyUsageSz = 0; cert->extExtKeyUsageCount = 0; cert->extAuthKeyIdSrc = NULL; cert->extAuthKeyIdSz = 0; cert->extSubjKeyIdSrc = NULL; cert->extSubjKeyIdSz = 0; #endif /* OPENSSL_EXTRA */ #if defined(OPENSSL_EXTRA) || !defined(IGNORE_NAME_CONSTRAINTS) cert->extNameConstraintSet = 0; #endif /* OPENSSL_EXTRA || !IGNORE_NAME_CONSTRAINTS */ #ifdef HAVE_ECC cert->pkCurveOID = 0; #endif /* HAVE_ECC */ #ifdef WOLFSSL_SEP cert->deviceTypeSz = 0; cert->deviceType = NULL; cert->hwTypeSz = 0; cert->hwType = NULL; cert->hwSerialNumSz = 0; cert->hwSerialNum = NULL; #ifdef OPENSSL_EXTRA cert->extCertPolicySet = 0; cert->extCertPolicyCrit = 0; #endif /* OPENSSL_EXTRA */ #endif /* WOLFSSL_SEP */ #ifdef WOLFSSL_CERT_EXT XMEMSET(cert->extCertPolicies, 0, MAX_CERTPOL_NB*MAX_CERTPOL_SZ); cert->extCertPoliciesNb = 0; #endif } void FreeAltNames(DNS_entry* altNames, void* heap) { (void)heap; while (altNames) { DNS_entry* tmp = altNames->next; XFREE(altNames->name, heap, DYNAMIC_TYPE_ALTNAME); XFREE(altNames, heap, DYNAMIC_TYPE_ALTNAME); altNames = tmp; } } #ifndef IGNORE_NAME_CONSTRAINTS void FreeNameSubtrees(Base_entry* names, void* heap) { (void)heap; while (names) { Base_entry* tmp = names->next; XFREE(names->name, heap, DYNAMIC_TYPE_ALTNAME); XFREE(names, heap, DYNAMIC_TYPE_ALTNAME); names = tmp; } } #endif /* IGNORE_NAME_CONSTRAINTS */ void FreeDecodedCert(DecodedCert* cert) { if (cert->subjectCNStored == 1) XFREE(cert->subjectCN, cert->heap, DYNAMIC_TYPE_SUBJECT_CN); if (cert->pubKeyStored == 1) XFREE(cert->publicKey, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY); if (cert->weOwnAltNames && cert->altNames) FreeAltNames(cert->altNames, cert->heap); #ifndef IGNORE_NAME_CONSTRAINTS if (cert->altEmailNames) FreeAltNames(cert->altEmailNames, cert->heap); if (cert->permittedNames) FreeNameSubtrees(cert->permittedNames, cert->heap); if (cert->excludedNames) FreeNameSubtrees(cert->excludedNames, cert->heap); #endif /* IGNORE_NAME_CONSTRAINTS */ #ifdef WOLFSSL_SEP XFREE(cert->deviceType, cert->heap, 0); XFREE(cert->hwType, cert->heap, 0); XFREE(cert->hwSerialNum, cert->heap, 0); #endif /* WOLFSSL_SEP */ #ifdef OPENSSL_EXTRA if (cert->issuerName.fullName != NULL) XFREE(cert->issuerName.fullName, NULL, DYNAMIC_TYPE_X509); if (cert->subjectName.fullName != NULL) XFREE(cert->subjectName.fullName, NULL, DYNAMIC_TYPE_X509); #endif /* OPENSSL_EXTRA */ } static int GetCertHeader(DecodedCert* cert) { int ret = 0, len; byte serialTmp[EXTERNAL_SERIAL_SIZE]; #if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH) mp_int* mpi = NULL; #else mp_int stack_mpi; mp_int* mpi = &stack_mpi; #endif if (GetSequence(cert->source, &cert->srcIdx, &len, cert->maxIdx) < 0) return ASN_PARSE_E; cert->certBegin = cert->srcIdx; if (GetSequence(cert->source, &cert->srcIdx, &len, cert->maxIdx) < 0) return ASN_PARSE_E; cert->sigIndex = len + cert->srcIdx; if (GetExplicitVersion(cert->source, &cert->srcIdx, &cert->version) < 0) return ASN_PARSE_E; #if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH) mpi = (mp_int*)XMALLOC(sizeof(mp_int), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (mpi == NULL) return MEMORY_E; #endif if (GetInt(mpi, cert->source, &cert->srcIdx, cert->maxIdx) < 0) { #if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH) XFREE(mpi, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_PARSE_E; } len = mp_unsigned_bin_size(mpi); if (len < (int)sizeof(serialTmp)) { if ( (ret = mp_to_unsigned_bin(mpi, serialTmp)) == MP_OKAY) { XMEMCPY(cert->serial, serialTmp, len); cert->serialSz = len; } } mp_clear(mpi); #if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH) XFREE(mpi, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } #if !defined(NO_RSA) /* Store Rsa Key, may save later, Dsa could use in future */ static int StoreRsaKey(DecodedCert* cert) { int length; word32 recvd = cert->srcIdx; if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; recvd = cert->srcIdx - recvd; length += recvd; while (recvd--) cert->srcIdx--; cert->pubKeySize = length; cert->publicKey = cert->source + cert->srcIdx; cert->srcIdx += length; return 0; } #endif #ifdef HAVE_ECC /* return 0 on sucess if the ECC curve oid sum is supported */ static int CheckCurve(word32 oid) { int ret = 0; switch (oid) { #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160) case ECC_160R1: #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192) case ECC_192R1: #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224) case ECC_224R1: #endif #if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256) case ECC_256R1: #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384) case ECC_384R1: #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521) case ECC_521R1: #endif break; default: ret = ALGO_ID_E; } return ret; } #endif /* HAVE_ECC */ static int GetKey(DecodedCert* cert) { int length; #ifdef HAVE_NTRU int tmpIdx = cert->srcIdx; #endif if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; if (GetAlgoId(cert->source, &cert->srcIdx, &cert->keyOID, cert->maxIdx) < 0) return ASN_PARSE_E; switch (cert->keyOID) { #ifndef NO_RSA case RSAk: { byte b = cert->source[cert->srcIdx++]; if (b != ASN_BIT_STRING) return ASN_BITSTR_E; if (GetLength(cert->source,&cert->srcIdx,&length,cert->maxIdx) < 0) return ASN_PARSE_E; b = cert->source[cert->srcIdx++]; if (b != 0x00) return ASN_EXPECT_0_E; return StoreRsaKey(cert); } #endif /* NO_RSA */ #ifdef HAVE_NTRU case NTRUk: { const byte* key = &cert->source[tmpIdx]; byte* next = (byte*)key; word16 keyLen; word32 rc; word32 remaining = cert->maxIdx - cert->srcIdx; #ifdef WOLFSSL_SMALL_STACK byte* keyBlob = NULL; #else byte keyBlob[MAX_NTRU_KEY_SZ]; #endif rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(key, &keyLen, NULL, &next, &remaining); if (rc != NTRU_OK) return ASN_NTRU_KEY_E; if (keyLen > MAX_NTRU_KEY_SZ) return ASN_NTRU_KEY_E; #ifdef WOLFSSL_SMALL_STACK keyBlob = (byte*)XMALLOC(MAX_NTRU_KEY_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (keyBlob == NULL) return MEMORY_E; #endif rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(key, &keyLen, keyBlob, &next, &remaining); if (rc != NTRU_OK) { #ifdef WOLFSSL_SMALL_STACK XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_NTRU_KEY_E; } if ( (next - key) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ASN_NTRU_KEY_E; } cert->srcIdx = tmpIdx + (int)(next - key); cert->publicKey = (byte*) XMALLOC(keyLen, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY); if (cert->publicKey == NULL) { #ifdef WOLFSSL_SMALL_STACK XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return MEMORY_E; } XMEMCPY(cert->publicKey, keyBlob, keyLen); cert->pubKeyStored = 1; cert->pubKeySize = keyLen; #ifdef WOLFSSL_SMALL_STACK XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return 0; } #endif /* HAVE_NTRU */ #ifdef HAVE_ECC case ECDSAk: { int oidSz = 0; byte b = cert->source[cert->srcIdx++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(cert->source,&cert->srcIdx,&oidSz,cert->maxIdx) < 0) return ASN_PARSE_E; while(oidSz--) cert->pkCurveOID += cert->source[cert->srcIdx++]; if (CheckCurve(cert->pkCurveOID) < 0) return ECC_CURVE_OID_E; /* key header */ b = cert->source[cert->srcIdx++]; if (b != ASN_BIT_STRING) return ASN_BITSTR_E; if (GetLength(cert->source,&cert->srcIdx,&length,cert->maxIdx) < 0) return ASN_PARSE_E; b = cert->source[cert->srcIdx++]; if (b != 0x00) return ASN_EXPECT_0_E; /* actual key, use length - 1 since ate preceding 0 */ length -= 1; cert->publicKey = (byte*) XMALLOC(length, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY); if (cert->publicKey == NULL) return MEMORY_E; XMEMCPY(cert->publicKey, &cert->source[cert->srcIdx], length); cert->pubKeyStored = 1; cert->pubKeySize = length; cert->srcIdx += length; return 0; } #endif /* HAVE_ECC */ default: return ASN_UNKNOWN_OID_E; } } /* process NAME, either issuer or subject */ static int GetName(DecodedCert* cert, int nameType) { int length; /* length of all distinguished names */ int dummy; int ret; char* full; byte* hash; word32 idx; #ifdef OPENSSL_EXTRA DecodedName* dName = (nameType == ISSUER) ? &cert->issuerName : &cert->subjectName; #endif /* OPENSSL_EXTRA */ WOLFSSL_MSG("Getting Cert Name"); if (nameType == ISSUER) { full = cert->issuer; hash = cert->issuerHash; } else { full = cert->subject; hash = cert->subjectHash; } if (cert->source[cert->srcIdx] == ASN_OBJECT_ID) { WOLFSSL_MSG("Trying optional prefix..."); if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; cert->srcIdx += length; WOLFSSL_MSG("Got optional prefix"); } /* For OCSP, RFC2560 section 4.1.1 states the issuer hash should be * calculated over the entire DER encoding of the Name field, including * the tag and length. */ idx = cert->srcIdx; if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; #ifdef NO_SHA ret = wc_Sha256Hash(&cert->source[idx], length + cert->srcIdx - idx, hash); #else ret = wc_ShaHash(&cert->source[idx], length + cert->srcIdx - idx, hash); #endif if (ret != 0) return ret; length += cert->srcIdx; idx = 0; #ifdef HAVE_PKCS7 /* store pointer to raw issuer */ if (nameType == ISSUER) { cert->issuerRaw = &cert->source[cert->srcIdx]; cert->issuerRawLen = length - cert->srcIdx; } #endif #ifndef IGNORE_NAME_CONSTRAINTS if (nameType == SUBJECT) { cert->subjectRaw = &cert->source[cert->srcIdx]; cert->subjectRawLen = length - cert->srcIdx; } #endif while (cert->srcIdx < (word32)length) { byte b; byte joint[2]; byte tooBig = FALSE; int oidSz; if (GetSet(cert->source, &cert->srcIdx, &dummy, cert->maxIdx) < 0) { WOLFSSL_MSG("Cert name lacks set header, trying sequence"); } if (GetSequence(cert->source, &cert->srcIdx, &dummy, cert->maxIdx) < 0) return ASN_PARSE_E; b = cert->source[cert->srcIdx++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(cert->source, &cert->srcIdx, &oidSz, cert->maxIdx) < 0) return ASN_PARSE_E; XMEMCPY(joint, &cert->source[cert->srcIdx], sizeof(joint)); /* v1 name types */ if (joint[0] == 0x55 && joint[1] == 0x04) { byte id; byte copy = FALSE; int strLen; cert->srcIdx += 2; id = cert->source[cert->srcIdx++]; b = cert->source[cert->srcIdx++]; /* encoding */ if (GetLength(cert->source, &cert->srcIdx, &strLen, cert->maxIdx) < 0) return ASN_PARSE_E; if ( (strLen + 14) > (int)(ASN_NAME_MAX - idx)) { /* include biggest pre fix header too 4 = "/serialNumber=" */ WOLFSSL_MSG("ASN Name too big, skipping"); tooBig = TRUE; } if (id == ASN_COMMON_NAME) { if (nameType == SUBJECT) { cert->subjectCN = (char *)&cert->source[cert->srcIdx]; cert->subjectCNLen = strLen; cert->subjectCNEnc = b; } if (!tooBig) { XMEMCPY(&full[idx], "/CN=", 4); idx += 4; copy = TRUE; } #ifdef OPENSSL_EXTRA dName->cnIdx = cert->srcIdx; dName->cnLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_SUR_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/SN=", 4); idx += 4; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectSN = (char*)&cert->source[cert->srcIdx]; cert->subjectSNLen = strLen; cert->subjectSNEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->snIdx = cert->srcIdx; dName->snLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_COUNTRY_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/C=", 3); idx += 3; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectC = (char*)&cert->source[cert->srcIdx]; cert->subjectCLen = strLen; cert->subjectCEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->cIdx = cert->srcIdx; dName->cLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_LOCALITY_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/L=", 3); idx += 3; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectL = (char*)&cert->source[cert->srcIdx]; cert->subjectLLen = strLen; cert->subjectLEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->lIdx = cert->srcIdx; dName->lLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_STATE_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/ST=", 4); idx += 4; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectST = (char*)&cert->source[cert->srcIdx]; cert->subjectSTLen = strLen; cert->subjectSTEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->stIdx = cert->srcIdx; dName->stLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_ORG_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/O=", 3); idx += 3; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectO = (char*)&cert->source[cert->srcIdx]; cert->subjectOLen = strLen; cert->subjectOEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->oIdx = cert->srcIdx; dName->oLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_ORGUNIT_NAME) { if (!tooBig) { XMEMCPY(&full[idx], "/OU=", 4); idx += 4; copy = TRUE; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectOU = (char*)&cert->source[cert->srcIdx]; cert->subjectOULen = strLen; cert->subjectOUEnc = b; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->ouIdx = cert->srcIdx; dName->ouLen = strLen; #endif /* OPENSSL_EXTRA */ } else if (id == ASN_SERIAL_NUMBER) { if (!tooBig) { XMEMCPY(&full[idx], "/serialNumber=", 14); idx += 14; copy = TRUE; } #ifdef OPENSSL_EXTRA dName->snIdx = cert->srcIdx; dName->snLen = strLen; #endif /* OPENSSL_EXTRA */ } if (copy && !tooBig) { XMEMCPY(&full[idx], &cert->source[cert->srcIdx], strLen); idx += strLen; } cert->srcIdx += strLen; } else { /* skip */ byte email = FALSE; byte uid = FALSE; int adv; if (joint[0] == 0x2a && joint[1] == 0x86) /* email id hdr */ email = TRUE; if (joint[0] == 0x9 && joint[1] == 0x92) /* uid id hdr */ uid = TRUE; cert->srcIdx += oidSz + 1; if (GetLength(cert->source, &cert->srcIdx, &adv, cert->maxIdx) < 0) return ASN_PARSE_E; if (adv > (int)(ASN_NAME_MAX - idx)) { WOLFSSL_MSG("ASN name too big, skipping"); tooBig = TRUE; } if (email) { if ( (14 + adv) > (int)(ASN_NAME_MAX - idx)) { WOLFSSL_MSG("ASN name too big, skipping"); tooBig = TRUE; } if (!tooBig) { XMEMCPY(&full[idx], "/emailAddress=", 14); idx += 14; } #ifdef WOLFSSL_CERT_GEN if (nameType == SUBJECT) { cert->subjectEmail = (char*)&cert->source[cert->srcIdx]; cert->subjectEmailLen = adv; } #endif /* WOLFSSL_CERT_GEN */ #ifdef OPENSSL_EXTRA dName->emailIdx = cert->srcIdx; dName->emailLen = adv; #endif /* OPENSSL_EXTRA */ #ifndef IGNORE_NAME_CONSTRAINTS { DNS_entry* emailName = NULL; emailName = (DNS_entry*)XMALLOC(sizeof(DNS_entry), cert->heap, DYNAMIC_TYPE_ALTNAME); if (emailName == NULL) { WOLFSSL_MSG("\tOut of Memory"); return MEMORY_E; } emailName->name = (char*)XMALLOC(adv + 1, cert->heap, DYNAMIC_TYPE_ALTNAME); if (emailName->name == NULL) { WOLFSSL_MSG("\tOut of Memory"); return MEMORY_E; } XMEMCPY(emailName->name, &cert->source[cert->srcIdx], adv); emailName->name[adv] = 0; emailName->next = cert->altEmailNames; cert->altEmailNames = emailName; } #endif /* IGNORE_NAME_CONSTRAINTS */ if (!tooBig) { XMEMCPY(&full[idx], &cert->source[cert->srcIdx], adv); idx += adv; } } if (uid) { if ( (5 + adv) > (int)(ASN_NAME_MAX - idx)) { WOLFSSL_MSG("ASN name too big, skipping"); tooBig = TRUE; } if (!tooBig) { XMEMCPY(&full[idx], "/UID=", 5); idx += 5; XMEMCPY(&full[idx], &cert->source[cert->srcIdx], adv); idx += adv; } #ifdef OPENSSL_EXTRA dName->uidIdx = cert->srcIdx; dName->uidLen = adv; #endif /* OPENSSL_EXTRA */ } cert->srcIdx += adv; } } full[idx++] = 0; #ifdef OPENSSL_EXTRA { int totalLen = 0; if (dName->cnLen != 0) totalLen += dName->cnLen + 4; if (dName->snLen != 0) totalLen += dName->snLen + 4; if (dName->cLen != 0) totalLen += dName->cLen + 3; if (dName->lLen != 0) totalLen += dName->lLen + 3; if (dName->stLen != 0) totalLen += dName->stLen + 4; if (dName->oLen != 0) totalLen += dName->oLen + 3; if (dName->ouLen != 0) totalLen += dName->ouLen + 4; if (dName->emailLen != 0) totalLen += dName->emailLen + 14; if (dName->uidLen != 0) totalLen += dName->uidLen + 5; if (dName->serialLen != 0) totalLen += dName->serialLen + 14; dName->fullName = (char*)XMALLOC(totalLen + 1, NULL, DYNAMIC_TYPE_X509); if (dName->fullName != NULL) { idx = 0; if (dName->cnLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/CN=", 4); idx += 4; XMEMCPY(&dName->fullName[idx], &cert->source[dName->cnIdx], dName->cnLen); dName->cnIdx = idx; idx += dName->cnLen; } if (dName->snLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/SN=", 4); idx += 4; XMEMCPY(&dName->fullName[idx], &cert->source[dName->snIdx], dName->snLen); dName->snIdx = idx; idx += dName->snLen; } if (dName->cLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/C=", 3); idx += 3; XMEMCPY(&dName->fullName[idx], &cert->source[dName->cIdx], dName->cLen); dName->cIdx = idx; idx += dName->cLen; } if (dName->lLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/L=", 3); idx += 3; XMEMCPY(&dName->fullName[idx], &cert->source[dName->lIdx], dName->lLen); dName->lIdx = idx; idx += dName->lLen; } if (dName->stLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/ST=", 4); idx += 4; XMEMCPY(&dName->fullName[idx], &cert->source[dName->stIdx], dName->stLen); dName->stIdx = idx; idx += dName->stLen; } if (dName->oLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/O=", 3); idx += 3; XMEMCPY(&dName->fullName[idx], &cert->source[dName->oIdx], dName->oLen); dName->oIdx = idx; idx += dName->oLen; } if (dName->ouLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/OU=", 4); idx += 4; XMEMCPY(&dName->fullName[idx], &cert->source[dName->ouIdx], dName->ouLen); dName->ouIdx = idx; idx += dName->ouLen; } if (dName->emailLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/emailAddress=", 14); idx += 14; XMEMCPY(&dName->fullName[idx], &cert->source[dName->emailIdx], dName->emailLen); dName->emailIdx = idx; idx += dName->emailLen; } if (dName->uidLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/UID=", 5); idx += 5; XMEMCPY(&dName->fullName[idx], &cert->source[dName->uidIdx], dName->uidLen); dName->uidIdx = idx; idx += dName->uidLen; } if (dName->serialLen != 0) { dName->entryCount++; XMEMCPY(&dName->fullName[idx], "/serialNumber=", 14); idx += 14; XMEMCPY(&dName->fullName[idx], &cert->source[dName->serialIdx], dName->serialLen); dName->serialIdx = idx; idx += dName->serialLen; } dName->fullName[idx] = '\0'; dName->fullNameLen = totalLen; } } #endif /* OPENSSL_EXTRA */ return 0; } #ifndef NO_TIME_H /* to the second */ static int DateGreaterThan(const struct tm* a, const struct tm* b) { if (a->tm_year > b->tm_year) return 1; if (a->tm_year == b->tm_year && a->tm_mon > b->tm_mon) return 1; if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon && a->tm_mday > b->tm_mday) return 1; if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon && a->tm_mday == b->tm_mday && a->tm_hour > b->tm_hour) return 1; if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon && a->tm_mday == b->tm_mday && a->tm_hour == b->tm_hour && a->tm_min > b->tm_min) return 1; if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon && a->tm_mday == b->tm_mday && a->tm_hour == b->tm_hour && a->tm_min == b->tm_min && a->tm_sec > b->tm_sec) return 1; return 0; /* false */ } static INLINE int DateLessThan(const struct tm* a, const struct tm* b) { return DateGreaterThan(b,a); } /* like atoi but only use first byte */ /* Make sure before and after dates are valid */ int ValidateDate(const byte* date, byte format, int dateType) { time_t ltime; struct tm certTime; struct tm* localTime; struct tm* tmpTime = NULL; int i = 0; #if defined(FREESCALE_MQX) || defined(TIME_OVERRIDES) struct tm tmpTimeStorage; tmpTime = &tmpTimeStorage; #else (void)tmpTime; #endif ltime = XTIME(0); XMEMSET(&certTime, 0, sizeof(certTime)); if (format == ASN_UTC_TIME) { if (btoi(date[0]) >= 5) certTime.tm_year = 1900; else certTime.tm_year = 2000; } else { /* format == GENERALIZED_TIME */ certTime.tm_year += btoi(date[i++]) * 1000; certTime.tm_year += btoi(date[i++]) * 100; } /* adjust tm_year, tm_mon */ GetTime((int*)&certTime.tm_year, date, &i); certTime.tm_year -= 1900; GetTime((int*)&certTime.tm_mon, date, &i); certTime.tm_mon -= 1; GetTime((int*)&certTime.tm_mday, date, &i); GetTime((int*)&certTime.tm_hour, date, &i); GetTime((int*)&certTime.tm_min, date, &i); GetTime((int*)&certTime.tm_sec, date, &i); if (date[i] != 'Z') { /* only Zulu supported for this profile */ WOLFSSL_MSG("Only Zulu time supported for this profile"); return 0; } localTime = XGMTIME(<ime, tmpTime); if (localTime == NULL) { WOLFSSL_MSG("XGMTIME failed"); return 0; } if (dateType == BEFORE) { if (DateLessThan(localTime, &certTime)) return 0; } else if (DateGreaterThan(localTime, &certTime)) return 0; return 1; } #endif /* NO_TIME_H */ static int GetDate(DecodedCert* cert, int dateType) { int length; byte date[MAX_DATE_SIZE]; byte b; word32 startIdx = 0; if (dateType == BEFORE) cert->beforeDate = &cert->source[cert->srcIdx]; else cert->afterDate = &cert->source[cert->srcIdx]; startIdx = cert->srcIdx; b = cert->source[cert->srcIdx++]; if (b != ASN_UTC_TIME && b != ASN_GENERALIZED_TIME) return ASN_TIME_E; if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; if (length > MAX_DATE_SIZE || length < MIN_DATE_SIZE) return ASN_DATE_SZ_E; XMEMCPY(date, &cert->source[cert->srcIdx], length); cert->srcIdx += length; if (dateType == BEFORE) cert->beforeDateLen = cert->srcIdx - startIdx; else cert->afterDateLen = cert->srcIdx - startIdx; if (!XVALIDATE_DATE(date, b, dateType)) { if (dateType == BEFORE) return ASN_BEFORE_DATE_E; else return ASN_AFTER_DATE_E; } return 0; } static int GetValidity(DecodedCert* cert, int verify) { int length; int badDate = 0; if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; if (GetDate(cert, BEFORE) < 0 && verify) badDate = ASN_BEFORE_DATE_E; /* continue parsing */ if (GetDate(cert, AFTER) < 0 && verify) return ASN_AFTER_DATE_E; if (badDate != 0) return badDate; return 0; } int DecodeToKey(DecodedCert* cert, int verify) { int badDate = 0; int ret; if ( (ret = GetCertHeader(cert)) < 0) return ret; WOLFSSL_MSG("Got Cert Header"); if ( (ret = GetAlgoId(cert->source, &cert->srcIdx, &cert->signatureOID, cert->maxIdx)) < 0) return ret; WOLFSSL_MSG("Got Algo ID"); if ( (ret = GetName(cert, ISSUER)) < 0) return ret; if ( (ret = GetValidity(cert, verify)) < 0) badDate = ret; if ( (ret = GetName(cert, SUBJECT)) < 0) return ret; WOLFSSL_MSG("Got Subject Name"); if ( (ret = GetKey(cert)) < 0) return ret; WOLFSSL_MSG("Got Key"); if (badDate != 0) return badDate; return ret; } static int GetSignature(DecodedCert* cert) { int length; byte b = cert->source[cert->srcIdx++]; if (b != ASN_BIT_STRING) return ASN_BITSTR_E; if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0) return ASN_PARSE_E; cert->sigLength = length; b = cert->source[cert->srcIdx++]; if (b != 0x00) return ASN_EXPECT_0_E; cert->sigLength--; cert->signature = &cert->source[cert->srcIdx]; cert->srcIdx += cert->sigLength; return 0; } static word32 SetDigest(const byte* digest, word32 digSz, byte* output) { output[0] = ASN_OCTET_STRING; output[1] = (byte)digSz; XMEMCPY(&output[2], digest, digSz); return digSz + 2; } static word32 BytePrecision(word32 value) { word32 i; for (i = sizeof(value); i; --i) if (value >> ((i - 1) * WOLFSSL_BIT_SIZE)) break; return i; } WOLFSSL_LOCAL word32 SetLength(word32 length, byte* output) { word32 i = 0, j; if (length < ASN_LONG_LENGTH) output[i++] = (byte)length; else { output[i++] = (byte)(BytePrecision(length) | ASN_LONG_LENGTH); for (j = BytePrecision(length); j; --j) { output[i] = (byte)(length >> ((j - 1) * WOLFSSL_BIT_SIZE)); i++; } } return i; } WOLFSSL_LOCAL word32 SetSequence(word32 len, byte* output) { output[0] = ASN_SEQUENCE | ASN_CONSTRUCTED; return SetLength(len, output + 1) + 1; } WOLFSSL_LOCAL word32 SetOctetString(word32 len, byte* output) { output[0] = ASN_OCTET_STRING; return SetLength(len, output + 1) + 1; } /* Write a set header to output */ WOLFSSL_LOCAL word32 SetSet(word32 len, byte* output) { output[0] = ASN_SET | ASN_CONSTRUCTED; return SetLength(len, output + 1) + 1; } WOLFSSL_LOCAL word32 SetImplicit(byte tag, byte number, word32 len, byte* output) { output[0] = ((tag == ASN_SEQUENCE || tag == ASN_SET) ? ASN_CONSTRUCTED : 0) | ASN_CONTEXT_SPECIFIC | number; return SetLength(len, output + 1) + 1; } WOLFSSL_LOCAL word32 SetExplicit(byte number, word32 len, byte* output) { output[0] = ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | number; return SetLength(len, output + 1) + 1; } #if defined(HAVE_ECC) && (defined(WOLFSSL_CERT_GEN) || defined(WOLFSSL_KEY_GEN)) static int SetCurve(ecc_key* key, byte* output) { /* curve types */ #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192) static const byte ECC_192v1_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d, 0x03, 0x01, 0x01}; #endif #if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256) static const byte ECC_256v1_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d, 0x03, 0x01, 0x07}; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160) static const byte ECC_160r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00, 0x02}; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224) static const byte ECC_224r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00, 0x21}; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384) static const byte ECC_384r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00, 0x22}; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521) static const byte ECC_521r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00, 0x23}; #endif int oidSz = 0; int idx = 0; int lenSz = 0; const byte* oid = 0; output[0] = ASN_OBJECT_ID; idx++; switch (key->dp->size) { #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160) case 20: oidSz = sizeof(ECC_160r1_AlgoID); oid = ECC_160r1_AlgoID; break; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192) case 24: oidSz = sizeof(ECC_192v1_AlgoID); oid = ECC_192v1_AlgoID; break; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224) case 28: oidSz = sizeof(ECC_224r1_AlgoID); oid = ECC_224r1_AlgoID; break; #endif #if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256) case 32: oidSz = sizeof(ECC_256v1_AlgoID); oid = ECC_256v1_AlgoID; break; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384) case 48: oidSz = sizeof(ECC_384r1_AlgoID); oid = ECC_384r1_AlgoID; break; #endif #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521) case 66: oidSz = sizeof(ECC_521r1_AlgoID); oid = ECC_521r1_AlgoID; break; #endif default: return ASN_UNKNOWN_OID_E; } lenSz = SetLength(oidSz, output+idx); idx += lenSz; XMEMCPY(output+idx, oid, oidSz); idx += oidSz; return idx; } #endif /* HAVE_ECC && WOLFSSL_CERT_GEN */ WOLFSSL_LOCAL word32 SetAlgoID(int algoOID, byte* output, int type, int curveSz) { /* adding TAG_NULL and 0 to end */ /* hashTypes */ static const byte shaAlgoID[] = { 0x2b, 0x0e, 0x03, 0x02, 0x1a, 0x05, 0x00 }; static const byte sha256AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01, 0x05, 0x00 }; static const byte sha384AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00 }; static const byte sha512AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00 }; static const byte md5AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x05, 0x05, 0x00 }; static const byte md2AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x02, 0x02, 0x05, 0x00}; /* blkTypes, no NULL tags because IV is there instead */ static const byte desCbcAlgoID[] = { 0x2B, 0x0E, 0x03, 0x02, 0x07 }; static const byte des3CbcAlgoID[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x03, 0x07 }; /* RSA sigTypes */ #ifndef NO_RSA static const byte md5wRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x04, 0x05, 0x00}; static const byte shawRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00}; static const byte sha256wRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00}; static const byte sha384wRSA_AlgoID[] = {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0c, 0x05, 0x00}; static const byte sha512wRSA_AlgoID[] = {0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0d, 0x05, 0x00}; #endif /* NO_RSA */ /* ECDSA sigTypes */ #ifdef HAVE_ECC static const byte shawECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d, 0x04, 0x01, 0x05, 0x00}; static const byte sha256wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d, 0x04, 0x03, 0x02, 0x05, 0x00}; static const byte sha384wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d, 0x04, 0x03, 0x03, 0x05, 0x00}; static const byte sha512wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d, 0x04, 0x03, 0x04, 0x05, 0x00}; #endif /* HAVE_ECC */ /* RSA keyType */ #ifndef NO_RSA static const byte RSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01, 0x05, 0x00}; #endif /* NO_RSA */ #ifdef HAVE_ECC /* ECC keyType */ /* no tags, so set tagSz smaller later */ static const byte ECC_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d, 0x02, 0x01}; #endif /* HAVE_ECC */ int algoSz = 0; int tagSz = 2; /* tag null and terminator */ word32 idSz, seqSz; const byte* algoName = 0; byte ID_Length[MAX_LENGTH_SZ]; byte seqArray[MAX_SEQ_SZ + 1]; /* add object_id to end */ if (type == hashType) { switch (algoOID) { case SHAh: algoSz = sizeof(shaAlgoID); algoName = shaAlgoID; break; case SHA256h: algoSz = sizeof(sha256AlgoID); algoName = sha256AlgoID; break; case SHA384h: algoSz = sizeof(sha384AlgoID); algoName = sha384AlgoID; break; case SHA512h: algoSz = sizeof(sha512AlgoID); algoName = sha512AlgoID; break; case MD2h: algoSz = sizeof(md2AlgoID); algoName = md2AlgoID; break; case MD5h: algoSz = sizeof(md5AlgoID); algoName = md5AlgoID; break; default: WOLFSSL_MSG("Unknown Hash Algo"); return 0; /* UNKOWN_HASH_E; */ } } else if (type == blkType) { switch (algoOID) { case DESb: algoSz = sizeof(desCbcAlgoID); algoName = desCbcAlgoID; tagSz = 0; break; case DES3b: algoSz = sizeof(des3CbcAlgoID); algoName = des3CbcAlgoID; tagSz = 0; break; default: WOLFSSL_MSG("Unknown Block Algo"); return 0; } } else if (type == sigType) { /* sigType */ switch (algoOID) { #ifndef NO_RSA case CTC_MD5wRSA: algoSz = sizeof(md5wRSA_AlgoID); algoName = md5wRSA_AlgoID; break; case CTC_SHAwRSA: algoSz = sizeof(shawRSA_AlgoID); algoName = shawRSA_AlgoID; break; case CTC_SHA256wRSA: algoSz = sizeof(sha256wRSA_AlgoID); algoName = sha256wRSA_AlgoID; break; case CTC_SHA384wRSA: algoSz = sizeof(sha384wRSA_AlgoID); algoName = sha384wRSA_AlgoID; break; case CTC_SHA512wRSA: algoSz = sizeof(sha512wRSA_AlgoID); algoName = sha512wRSA_AlgoID; break; #endif /* NO_RSA */ #ifdef HAVE_ECC case CTC_SHAwECDSA: algoSz = sizeof(shawECDSA_AlgoID); algoName = shawECDSA_AlgoID; break; case CTC_SHA256wECDSA: algoSz = sizeof(sha256wECDSA_AlgoID); algoName = sha256wECDSA_AlgoID; break; case CTC_SHA384wECDSA: algoSz = sizeof(sha384wECDSA_AlgoID); algoName = sha384wECDSA_AlgoID; break; case CTC_SHA512wECDSA: algoSz = sizeof(sha512wECDSA_AlgoID); algoName = sha512wECDSA_AlgoID; break; #endif /* HAVE_ECC */ default: WOLFSSL_MSG("Unknown Signature Algo"); return 0; } } else if (type == keyType) { /* keyType */ switch (algoOID) { #ifndef NO_RSA case RSAk: algoSz = sizeof(RSA_AlgoID); algoName = RSA_AlgoID; break; #endif /* NO_RSA */ #ifdef HAVE_ECC case ECDSAk: algoSz = sizeof(ECC_AlgoID); algoName = ECC_AlgoID; tagSz = 0; break; #endif /* HAVE_ECC */ default: WOLFSSL_MSG("Unknown Key Algo"); return 0; } } else { WOLFSSL_MSG("Unknown Algo type"); return 0; } idSz = SetLength(algoSz - tagSz, ID_Length); /* don't include tags */ seqSz = SetSequence(idSz + algoSz + 1 + curveSz, seqArray); /* +1 for object id, curveID of curveSz follows for ecc */ seqArray[seqSz++] = ASN_OBJECT_ID; XMEMCPY(output, seqArray, seqSz); XMEMCPY(output + seqSz, ID_Length, idSz); XMEMCPY(output + seqSz + idSz, algoName, algoSz); return seqSz + idSz + algoSz; } word32 wc_EncodeSignature(byte* out, const byte* digest, word32 digSz, int hashOID) { byte digArray[MAX_ENCODED_DIG_SZ]; byte algoArray[MAX_ALGO_SZ]; byte seqArray[MAX_SEQ_SZ]; word32 encDigSz, algoSz, seqSz; encDigSz = SetDigest(digest, digSz, digArray); algoSz = SetAlgoID(hashOID, algoArray, hashType, 0); seqSz = SetSequence(encDigSz + algoSz, seqArray); XMEMCPY(out, seqArray, seqSz); XMEMCPY(out + seqSz, algoArray, algoSz); XMEMCPY(out + seqSz + algoSz, digArray, encDigSz); return encDigSz + algoSz + seqSz; } int wc_GetCTC_HashOID(int type) { switch (type) { #ifdef WOLFSSL_MD2 case MD2: return MD2h; #endif #ifndef NO_MD5 case MD5: return MD5h; #endif #ifndef NO_SHA case SHA: return SHAh; #endif #ifndef NO_SHA256 case SHA256: return SHA256h; #endif #ifdef WOLFSSL_SHA384 case SHA384: return SHA384h; #endif #ifdef WOLFSSL_SHA512 case SHA512: return SHA512h; #endif default: return 0; }; } /* return true (1) or false (0) for Confirmation */ static int ConfirmSignature(const byte* buf, word32 bufSz, const byte* key, word32 keySz, word32 keyOID, const byte* sig, word32 sigSz, word32 sigOID, void* heap) { int typeH = 0, digestSz = 0, ret = 0; #ifdef WOLFSSL_SMALL_STACK byte* digest; #else byte digest[MAX_DIGEST_SIZE]; #endif #ifdef WOLFSSL_SMALL_STACK digest = (byte*)XMALLOC(MAX_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (digest == NULL) return 0; /* not confirmed */ #endif (void)key; (void)keySz; (void)sig; (void)sigSz; (void)heap; switch (sigOID) { #ifndef NO_MD5 case CTC_MD5wRSA: if (wc_Md5Hash(buf, bufSz, digest) == 0) { typeH = MD5h; digestSz = MD5_DIGEST_SIZE; } break; #endif #if defined(WOLFSSL_MD2) case CTC_MD2wRSA: if (wc_Md2Hash(buf, bufSz, digest) == 0) { typeH = MD2h; digestSz = MD2_DIGEST_SIZE; } break; #endif #ifndef NO_SHA case CTC_SHAwRSA: case CTC_SHAwDSA: case CTC_SHAwECDSA: if (wc_ShaHash(buf, bufSz, digest) == 0) { typeH = SHAh; digestSz = SHA_DIGEST_SIZE; } break; #endif #ifndef NO_SHA256 case CTC_SHA256wRSA: case CTC_SHA256wECDSA: if (wc_Sha256Hash(buf, bufSz, digest) == 0) { typeH = SHA256h; digestSz = SHA256_DIGEST_SIZE; } break; #endif #ifdef WOLFSSL_SHA512 case CTC_SHA512wRSA: case CTC_SHA512wECDSA: if (wc_Sha512Hash(buf, bufSz, digest) == 0) { typeH = SHA512h; digestSz = SHA512_DIGEST_SIZE; } break; #endif #ifdef WOLFSSL_SHA384 case CTC_SHA384wRSA: case CTC_SHA384wECDSA: if (wc_Sha384Hash(buf, bufSz, digest) == 0) { typeH = SHA384h; digestSz = SHA384_DIGEST_SIZE; } break; #endif default: WOLFSSL_MSG("Verify Signautre has unsupported type"); } if (typeH == 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return 0; /* not confirmed */ } switch (keyOID) { #ifndef NO_RSA case RSAk: { word32 idx = 0; int encodedSigSz, verifySz; byte* out; #ifdef WOLFSSL_SMALL_STACK RsaKey* pubKey; byte* plain; byte* encodedSig; #else RsaKey pubKey[1]; byte plain[MAX_ENCODED_SIG_SZ]; byte encodedSig[MAX_ENCODED_SIG_SZ]; #endif #ifdef WOLFSSL_SMALL_STACK pubKey = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL, DYNAMIC_TYPE_TMP_BUFFER); plain = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); encodedSig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (pubKey == NULL || plain == NULL || encodedSig == NULL) { WOLFSSL_MSG("Failed to allocate memory at ConfirmSignature"); if (pubKey) XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (plain) XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (encodedSig) XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER); break; /* not confirmed */ } #endif if (sigSz > MAX_ENCODED_SIG_SZ) { WOLFSSL_MSG("Verify Signautre is too big"); } else if (wc_InitRsaKey(pubKey, heap) != 0) { WOLFSSL_MSG("InitRsaKey failed"); } else if (wc_RsaPublicKeyDecode(key, &idx, pubKey, keySz) < 0) { WOLFSSL_MSG("ASN Key decode error RSA"); } else { XMEMCPY(plain, sig, sigSz); if ((verifySz = wc_RsaSSL_VerifyInline(plain, sigSz, &out, pubKey)) < 0) { WOLFSSL_MSG("Rsa SSL verify error"); } else { /* make sure we're right justified */ encodedSigSz = wc_EncodeSignature(encodedSig, digest, digestSz, typeH); if (encodedSigSz != verifySz || XMEMCMP(out, encodedSig, encodedSigSz) != 0) { WOLFSSL_MSG("Rsa SSL verify match encode error"); } else ret = 1; /* match */ #ifdef WOLFSSL_DEBUG_ENCODING { int x; printf("wolfssl encodedSig:\n"); for (x = 0; x < encodedSigSz; x++) { printf("%02x ", encodedSig[x]); if ( (x % 16) == 15) printf("\n"); } printf("\n"); printf("actual digest:\n"); for (x = 0; x < verifySz; x++) { printf("%02x ", out[x]); if ( (x % 16) == 15) printf("\n"); } printf("\n"); } #endif /* WOLFSSL_DEBUG_ENCODING */ } } wc_FreeRsaKey(pubKey); #ifdef WOLFSSL_SMALL_STACK XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif break; } #endif /* NO_RSA */ #ifdef HAVE_ECC case ECDSAk: { int verify = 0; #ifdef WOLFSSL_SMALL_STACK ecc_key* pubKey; #else ecc_key pubKey[1]; #endif #ifdef WOLFSSL_SMALL_STACK pubKey = (ecc_key*)XMALLOC(sizeof(ecc_key), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (pubKey == NULL) { WOLFSSL_MSG("Failed to allocate pubKey"); break; /* not confirmed */ } #endif if (wc_ecc_init(pubKey) < 0) { WOLFSSL_MSG("Failed to initialize key"); break; /* not confirmed */ } if (wc_ecc_import_x963(key, keySz, pubKey) < 0) { WOLFSSL_MSG("ASN Key import error ECC"); } else { if (wc_ecc_verify_hash(sig, sigSz, digest, digestSz, &verify, pubKey) != 0) { WOLFSSL_MSG("ECC verify hash error"); } else if (1 != verify) { WOLFSSL_MSG("ECC Verify didn't match"); } else ret = 1; /* match */ } wc_ecc_free(pubKey); #ifdef WOLFSSL_SMALL_STACK XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif break; } #endif /* HAVE_ECC */ default: WOLFSSL_MSG("Verify Key type unknown"); } #ifdef WOLFSSL_SMALL_STACK XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } #ifndef IGNORE_NAME_CONSTRAINTS static int MatchBaseName(int type, const char* name, int nameSz, const char* base, int baseSz) { if (base == NULL || baseSz <= 0 || name == NULL || nameSz <= 0 || name[0] == '.' || nameSz < baseSz || (type != ASN_RFC822_TYPE && type != ASN_DNS_TYPE)) return 0; /* If an email type, handle special cases where the base is only * a domain, or is an email address itself. */ if (type == ASN_RFC822_TYPE) { const char* p = NULL; int count = 0; if (base[0] != '.') { p = base; count = 0; /* find the '@' in the base */ while (*p != '@' && count < baseSz) { count++; p++; } /* No '@' in base, reset p to NULL */ if (count >= baseSz) p = NULL; } if (p == NULL) { /* Base isn't an email address, it is a domain name, * wind the name forward one character past its '@'. */ p = name; count = 0; while (*p != '@' && count < baseSz) { count++; p++; } if (count < baseSz && *p == '@') { name = p + 1; nameSz -= count + 1; } } } if ((type == ASN_DNS_TYPE || type == ASN_RFC822_TYPE) && base[0] == '.') { int szAdjust = nameSz - baseSz; name += szAdjust; nameSz -= szAdjust; } while (nameSz > 0) { if (XTOLOWER((unsigned char)*name++) != XTOLOWER((unsigned char)*base++)) return 0; nameSz--; } return 1; } static int ConfirmNameConstraints(Signer* signer, DecodedCert* cert) { if (signer == NULL || cert == NULL) return 0; /* Check against the excluded list */ if (signer->excludedNames) { Base_entry* base = signer->excludedNames; while (base != NULL) { if (base->type == ASN_DNS_TYPE) { DNS_entry* name = cert->altNames; while (name != NULL) { if (MatchBaseName(ASN_DNS_TYPE, name->name, (int)XSTRLEN(name->name), base->name, base->nameSz)) return 0; name = name->next; } } else if (base->type == ASN_RFC822_TYPE) { DNS_entry* name = cert->altEmailNames; while (name != NULL) { if (MatchBaseName(ASN_RFC822_TYPE, name->name, (int)XSTRLEN(name->name), base->name, base->nameSz)) return 0; name = name->next; } } else if (base->type == ASN_DIR_TYPE) { if (cert->subjectRawLen == base->nameSz && XMEMCMP(cert->subjectRaw, base->name, base->nameSz) == 0) { return 0; } } base = base->next; } } /* Check against the permitted list */ if (signer->permittedNames != NULL) { int needDns = 0; int matchDns = 0; int needEmail = 0; int matchEmail = 0; int needDir = 0; int matchDir = 0; Base_entry* base = signer->permittedNames; while (base != NULL) { if (base->type == ASN_DNS_TYPE) { DNS_entry* name = cert->altNames; if (name != NULL) needDns = 1; while (name != NULL) { matchDns = MatchBaseName(ASN_DNS_TYPE, name->name, (int)XSTRLEN(name->name), base->name, base->nameSz); name = name->next; } } else if (base->type == ASN_RFC822_TYPE) { DNS_entry* name = cert->altEmailNames; if (name != NULL) needEmail = 1; while (name != NULL) { matchEmail = MatchBaseName(ASN_DNS_TYPE, name->name, (int)XSTRLEN(name->name), base->name, base->nameSz); name = name->next; } } else if (base->type == ASN_DIR_TYPE) { needDir = 1; if (cert->subjectRaw != NULL && cert->subjectRawLen == base->nameSz && XMEMCMP(cert->subjectRaw, base->name, base->nameSz) == 0) { matchDir = 1; } } base = base->next; } if ((needDns && !matchDns) || (needEmail && !matchEmail) || (needDir && !matchDir)) { return 0; } } return 1; } #endif /* IGNORE_NAME_CONSTRAINTS */ static int DecodeAltNames(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0; WOLFSSL_ENTER("DecodeAltNames"); if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tBad Sequence"); return ASN_PARSE_E; } cert->weOwnAltNames = 1; while (length > 0) { byte b = input[idx++]; length--; /* Save DNS Type names in the altNames list. */ /* Save Other Type names in the cert's OidMap */ if (b == (ASN_CONTEXT_SPECIFIC | ASN_DNS_TYPE)) { DNS_entry* dnsEntry; int strLen; word32 lenStartIdx = idx; if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfail: str length"); return ASN_PARSE_E; } length -= (idx - lenStartIdx); dnsEntry = (DNS_entry*)XMALLOC(sizeof(DNS_entry), cert->heap, DYNAMIC_TYPE_ALTNAME); if (dnsEntry == NULL) { WOLFSSL_MSG("\tOut of Memory"); return ASN_PARSE_E; } dnsEntry->name = (char*)XMALLOC(strLen + 1, cert->heap, DYNAMIC_TYPE_ALTNAME); if (dnsEntry->name == NULL) { WOLFSSL_MSG("\tOut of Memory"); XFREE(dnsEntry, cert->heap, DYNAMIC_TYPE_ALTNAME); return ASN_PARSE_E; } XMEMCPY(dnsEntry->name, &input[idx], strLen); dnsEntry->name[strLen] = '\0'; dnsEntry->next = cert->altNames; cert->altNames = dnsEntry; length -= strLen; idx += strLen; } #ifndef IGNORE_NAME_CONSTRAINTS else if (b == (ASN_CONTEXT_SPECIFIC | ASN_RFC822_TYPE)) { DNS_entry* emailEntry; int strLen; word32 lenStartIdx = idx; if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfail: str length"); return ASN_PARSE_E; } length -= (idx - lenStartIdx); emailEntry = (DNS_entry*)XMALLOC(sizeof(DNS_entry), cert->heap, DYNAMIC_TYPE_ALTNAME); if (emailEntry == NULL) { WOLFSSL_MSG("\tOut of Memory"); return ASN_PARSE_E; } emailEntry->name = (char*)XMALLOC(strLen + 1, cert->heap, DYNAMIC_TYPE_ALTNAME); if (emailEntry->name == NULL) { WOLFSSL_MSG("\tOut of Memory"); XFREE(emailEntry, cert->heap, DYNAMIC_TYPE_ALTNAME); return ASN_PARSE_E; } XMEMCPY(emailEntry->name, &input[idx], strLen); emailEntry->name[strLen] = '\0'; emailEntry->next = cert->altEmailNames; cert->altEmailNames = emailEntry; length -= strLen; idx += strLen; } #endif /* IGNORE_NAME_CONSTRAINTS */ #ifdef WOLFSSL_SEP else if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | ASN_OTHER_TYPE)) { int strLen; word32 lenStartIdx = idx; word32 oid = 0; if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfail: other name length"); return ASN_PARSE_E; } /* Consume the rest of this sequence. */ length -= (strLen + idx - lenStartIdx); if (GetObjectId(input, &idx, &oid, sz) < 0) { WOLFSSL_MSG("\tbad OID"); return ASN_PARSE_E; } if (oid != HW_NAME_OID) { WOLFSSL_MSG("\tincorrect OID"); return ASN_PARSE_E; } if (input[idx++] != (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED)) { WOLFSSL_MSG("\twrong type"); return ASN_PARSE_E; } if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfail: str len"); return ASN_PARSE_E; } if (GetSequence(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tBad Sequence"); return ASN_PARSE_E; } if (input[idx++] != ASN_OBJECT_ID) { WOLFSSL_MSG("\texpected OID"); return ASN_PARSE_E; } if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfailed: str len"); return ASN_PARSE_E; } cert->hwType = (byte*)XMALLOC(strLen, cert->heap, 0); if (cert->hwType == NULL) { WOLFSSL_MSG("\tOut of Memory"); return MEMORY_E; } XMEMCPY(cert->hwType, &input[idx], strLen); cert->hwTypeSz = strLen; idx += strLen; if (input[idx++] != ASN_OCTET_STRING) { WOLFSSL_MSG("\texpected Octet String"); return ASN_PARSE_E; } if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfailed: str len"); return ASN_PARSE_E; } cert->hwSerialNum = (byte*)XMALLOC(strLen + 1, cert->heap, 0); if (cert->hwSerialNum == NULL) { WOLFSSL_MSG("\tOut of Memory"); return MEMORY_E; } XMEMCPY(cert->hwSerialNum, &input[idx], strLen); cert->hwSerialNum[strLen] = '\0'; cert->hwSerialNumSz = strLen; idx += strLen; } #endif /* WOLFSSL_SEP */ else { int strLen; word32 lenStartIdx = idx; WOLFSSL_MSG("\tUnsupported name type, skipping"); if (GetLength(input, &idx, &strLen, sz) < 0) { WOLFSSL_MSG("\tfail: unsupported name length"); return ASN_PARSE_E; } length -= (strLen + idx - lenStartIdx); idx += strLen; } } return 0; } static int DecodeBasicCaConstraint(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0; WOLFSSL_ENTER("DecodeBasicCaConstraint"); if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: bad SEQUENCE"); return ASN_PARSE_E; } if (length == 0) return 0; /* If the basic ca constraint is false, this extension may be named, but * left empty. So, if the length is 0, just return. */ if (input[idx++] != ASN_BOOLEAN) { WOLFSSL_MSG("\tfail: constraint not BOOLEAN"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: length"); return ASN_PARSE_E; } if (input[idx++]) cert->isCA = 1; #ifdef OPENSSL_EXTRA /* If there isn't any more data, return. */ if (idx >= (word32)sz) return 0; /* Anything left should be the optional pathlength */ if (input[idx++] != ASN_INTEGER) { WOLFSSL_MSG("\tfail: pathlen not INTEGER"); return ASN_PARSE_E; } if (input[idx++] != 1) { WOLFSSL_MSG("\tfail: pathlen too long"); return ASN_PARSE_E; } cert->pathLength = input[idx]; cert->extBasicConstPlSet = 1; #endif /* OPENSSL_EXTRA */ return 0; } #define CRLDP_FULL_NAME 0 /* From RFC3280 SS4.2.1.14, Distribution Point Name*/ #define GENERALNAME_URI 6 /* From RFC3280 SS4.2.1.7, GeneralName */ static int DecodeCrlDist(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0; WOLFSSL_ENTER("DecodeCrlDist"); /* Unwrap the list of Distribution Points*/ if (GetSequence(input, &idx, &length, sz) < 0) return ASN_PARSE_E; /* Unwrap a single Distribution Point */ if (GetSequence(input, &idx, &length, sz) < 0) return ASN_PARSE_E; /* The Distribution Point has three explicit optional members * First check for a DistributionPointName */ if (input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)) { idx++; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; if (input[idx] == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | CRLDP_FULL_NAME)) { idx++; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; if (input[idx] == (ASN_CONTEXT_SPECIFIC | GENERALNAME_URI)) { idx++; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; cert->extCrlInfoSz = length; cert->extCrlInfo = input + idx; idx += length; } else /* This isn't a URI, skip it. */ idx += length; } else /* This isn't a FULLNAME, skip it. */ idx += length; } /* Check for reasonFlags */ if (idx < (word32)sz && input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1)) { idx++; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; idx += length; } /* Check for cRLIssuer */ if (idx < (word32)sz && input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 2)) { idx++; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; idx += length; } if (idx < (word32)sz) { WOLFSSL_MSG("\tThere are more CRL Distribution Point records, " "but we only use the first one."); } return 0; } static int DecodeAuthInfo(byte* input, int sz, DecodedCert* cert) /* * Read the first of the Authority Information Access records. If there are * any issues, return without saving the record. */ { word32 idx = 0; int length = 0; byte b; word32 oid; WOLFSSL_ENTER("DecodeAuthInfo"); /* Unwrap the list of AIAs */ if (GetSequence(input, &idx, &length, sz) < 0) return ASN_PARSE_E; while (idx < (word32)sz) { /* Unwrap a single AIA */ if (GetSequence(input, &idx, &length, sz) < 0) return ASN_PARSE_E; oid = 0; if (GetObjectId(input, &idx, &oid, sz) < 0) return ASN_PARSE_E; /* Only supporting URIs right now. */ b = input[idx++]; if (GetLength(input, &idx, &length, sz) < 0) return ASN_PARSE_E; if (b == (ASN_CONTEXT_SPECIFIC | GENERALNAME_URI) && oid == AIA_OCSP_OID) { cert->extAuthInfoSz = length; cert->extAuthInfo = input + idx; break; } idx += length; } return 0; } static int DecodeAuthKeyId(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0, ret = 0; WOLFSSL_ENTER("DecodeAuthKeyId"); if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE\n"); return ASN_PARSE_E; } if (input[idx++] != (ASN_CONTEXT_SPECIFIC | 0)) { WOLFSSL_MSG("\tinfo: OPTIONAL item 0, not available\n"); return 0; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: extension data length"); return ASN_PARSE_E; } #ifdef OPENSSL_EXTRA cert->extAuthKeyIdSrc = &input[idx]; cert->extAuthKeyIdSz = length; #endif /* OPENSSL_EXTRA */ if (length == KEYID_SIZE) { XMEMCPY(cert->extAuthKeyId, input + idx, length); } else { #ifdef NO_SHA ret = wc_Sha256Hash(input + idx, length, cert->extAuthKeyId); #else ret = wc_ShaHash(input + idx, length, cert->extAuthKeyId); #endif } return ret; } static int DecodeSubjKeyId(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0, ret = 0; WOLFSSL_ENTER("DecodeSubjKeyId"); if (input[idx++] != ASN_OCTET_STRING) { WOLFSSL_MSG("\tfail: should be an OCTET STRING"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: extension data length"); return ASN_PARSE_E; } #ifdef OPENSSL_EXTRA cert->extSubjKeyIdSrc = &input[idx]; cert->extSubjKeyIdSz = length; #endif /* OPENSSL_EXTRA */ if (length == SIGNER_DIGEST_SIZE) { XMEMCPY(cert->extSubjKeyId, input + idx, length); } else { #ifdef NO_SHA ret = wc_Sha256Hash(input + idx, length, cert->extSubjKeyId); #else ret = wc_ShaHash(input + idx, length, cert->extSubjKeyId); #endif } return ret; } static int DecodeKeyUsage(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length; WOLFSSL_ENTER("DecodeKeyUsage"); if (input[idx++] != ASN_BIT_STRING) { WOLFSSL_MSG("\tfail: key usage expected bit string"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: key usage bad length"); return ASN_PARSE_E; } /* pass the unusedBits value */ idx++; length--; cert->extKeyUsage = (word16)(input[idx]); if (length == 2) cert->extKeyUsage |= (word16)(input[idx+1] << 8); return 0; } static int DecodeExtKeyUsage(byte* input, int sz, DecodedCert* cert) { word32 idx = 0, oid; int length; WOLFSSL_ENTER("DecodeExtKeyUsage"); if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE"); return ASN_PARSE_E; } #ifdef OPENSSL_EXTRA cert->extExtKeyUsageSrc = input + idx; cert->extExtKeyUsageSz = length; #endif while (idx < (word32)sz) { if (GetObjectId(input, &idx, &oid, sz) < 0) return ASN_PARSE_E; switch (oid) { case EKU_ANY_OID: cert->extExtKeyUsage |= EXTKEYUSE_ANY; break; case EKU_SERVER_AUTH_OID: cert->extExtKeyUsage |= EXTKEYUSE_SERVER_AUTH; break; case EKU_CLIENT_AUTH_OID: cert->extExtKeyUsage |= EXTKEYUSE_CLIENT_AUTH; break; case EKU_OCSP_SIGN_OID: cert->extExtKeyUsage |= EXTKEYUSE_OCSP_SIGN; break; } #ifdef OPENSSL_EXTRA cert->extExtKeyUsageCount++; #endif } return 0; } #ifndef IGNORE_NAME_CONSTRAINTS static int DecodeSubtree(byte* input, int sz, Base_entry** head, void* heap) { word32 idx = 0; (void)heap; while (idx < (word32)sz) { int seqLength, strLength; word32 nameIdx; byte b; if (GetSequence(input, &idx, &seqLength, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE"); return ASN_PARSE_E; } nameIdx = idx; b = input[nameIdx++]; if (GetLength(input, &nameIdx, &strLength, sz) <= 0) { WOLFSSL_MSG("\tinvalid length"); return ASN_PARSE_E; } if (b == (ASN_CONTEXT_SPECIFIC | ASN_DNS_TYPE) || b == (ASN_CONTEXT_SPECIFIC | ASN_RFC822_TYPE) || b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | ASN_DIR_TYPE)) { Base_entry* entry = (Base_entry*)XMALLOC(sizeof(Base_entry), heap, DYNAMIC_TYPE_ALTNAME); if (entry == NULL) { WOLFSSL_MSG("allocate error"); return MEMORY_E; } entry->name = (char*)XMALLOC(strLength, heap, DYNAMIC_TYPE_ALTNAME); if (entry->name == NULL) { WOLFSSL_MSG("allocate error"); return MEMORY_E; } XMEMCPY(entry->name, &input[nameIdx], strLength); entry->nameSz = strLength; entry->type = b & 0x0F; entry->next = *head; *head = entry; } idx += seqLength; } return 0; } static int DecodeNameConstraints(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int length = 0; WOLFSSL_ENTER("DecodeNameConstraints"); if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE"); return ASN_PARSE_E; } while (idx < (word32)sz) { byte b = input[idx++]; Base_entry** subtree = NULL; if (GetLength(input, &idx, &length, sz) <= 0) { WOLFSSL_MSG("\tinvalid length"); return ASN_PARSE_E; } if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 0)) subtree = &cert->permittedNames; else if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 1)) subtree = &cert->excludedNames; else { WOLFSSL_MSG("\tinvalid subtree"); return ASN_PARSE_E; } DecodeSubtree(input + idx, length, subtree, cert->heap); idx += length; } return 0; } #endif /* IGNORE_NAME_CONSTRAINTS */ #if defined(WOLFSSL_CERT_EXT) && !defined(WOLFSSL_SEP) static int Word32ToString(char* d, word32 number) { int i = 0; if (d != NULL) { word32 order = 1000000000; word32 digit; if (number == 0) { d[i++] = '0'; } else { while (order) { digit = number / order; if (i > 0 || digit != 0) { d[i++] = (char)digit + '0'; } if (digit != 0) number %= digit * order; if (order > 1) order /= 10; else order = 0; } } d[i] = 0; } return i; } /* Decode ITU-T X.690 OID format to a string representation * return string length */ static int DecodePolicyOID(char *out, word32 outSz, byte *in, word32 inSz) { word32 val, idx = 0, nb_bytes; size_t w_bytes = 0; if (out == NULL || in == NULL || outSz < 4 || inSz < 2) return BAD_FUNC_ARG; /* first two byte must be interpreted as : 40 * int1 + int2 */ val = (word16)in[idx++]; w_bytes = Word32ToString(out, val / 40); out[w_bytes++] = '.'; w_bytes += Word32ToString(out+w_bytes, val % 40); while (idx < inSz) { /* init value */ val = 0; nb_bytes = 0; /* check that output size is ok */ if (w_bytes > (outSz - 3)) return BUFFER_E; /* first bit is used to set if value is coded on 1 or multiple bytes */ while ((in[idx+nb_bytes] & 0x80)) nb_bytes++; if (!nb_bytes) val = (word32)(in[idx++] & 0x7f); else { word32 base = 1, tmp = nb_bytes; while (tmp != 0) { val += (word32)(in[idx+tmp] & 0x7f) * base; base *= 128; tmp--; } val += (word32)(in[idx++] & 0x7f) * base; idx += nb_bytes; } out[w_bytes++] = '.'; w_bytes += Word32ToString(out+w_bytes, val); } return 0; } #endif /* WOLFSSL_CERT_EXT && !WOLFSSL_SEP */ #if defined(WOLFSSL_SEP) || defined(WOLFSSL_CERT_EXT) static int DecodeCertPolicy(byte* input, int sz, DecodedCert* cert) { word32 idx = 0; int total_length = 0, length = 0; WOLFSSL_ENTER("DecodeCertPolicy"); /* Unwrap certificatePolicies */ if (GetSequence(input, &idx, &total_length, sz) < 0) { WOLFSSL_MSG("\tdeviceType isn't OID"); return ASN_PARSE_E; } if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tdeviceType isn't OID"); return ASN_PARSE_E; } total_length -= (length+1); if (input[idx++] != ASN_OBJECT_ID) { WOLFSSL_MSG("\tdeviceType isn't OID"); return ASN_PARSE_E; } total_length--; if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tCouldn't read length of deviceType"); return ASN_PARSE_E; } if (length > 0) { #if defined(WOLFSSL_SEP) cert->deviceType = (byte*)XMALLOC(length, cert->heap, 0); if (cert->deviceType == NULL) { WOLFSSL_MSG("\tCouldn't alloc memory for deviceType"); return MEMORY_E; } cert->deviceTypeSz = length; XMEMCPY(cert->deviceType, input + idx, length); #elif defined(WOLFSSL_CERT_EXT) /* decode cert policy */ if (DecodePolicyOID(cert->extCertPolicies[0], MAX_CERTPOL_SZ, input+idx, length) != 0) { WOLFSSL_MSG("\tCouldn't read Policy OID 1"); return ASN_PARSE_E; } cert->extCertPoliciesNb++; /* check if we have a second value */ if (total_length) { idx += length; if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tdeviceType isn't OID"); return ASN_PARSE_E; } if (input[idx++] != ASN_OBJECT_ID) { WOLFSSL_MSG("\tdeviceType isn't OID"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tCouldn't read length of deviceType"); return ASN_PARSE_E; } /* decode cert policy */ if (DecodePolicyOID(cert->extCertPolicies[1], MAX_CERTPOL_SZ, input+idx, length) != 0) { WOLFSSL_MSG("\tCouldn't read Policy OID 2"); return ASN_PARSE_E; } cert->extCertPoliciesNb++; } #else WOLFSSL_LEAVE("DecodeCertPolicy : unsupported mode", 0); return 0; #endif } WOLFSSL_LEAVE("DecodeCertPolicy", 0); return 0; } #endif /* WOLFSSL_SEP */ static int DecodeCertExtensions(DecodedCert* cert) /* * Processing the Certificate Extensions. This does not modify the current * index. It is works starting with the recorded extensions pointer. */ { word32 idx = 0; int sz = cert->extensionsSz; byte* input = cert->extensions; int length; word32 oid; byte critical = 0; byte criticalFail = 0; WOLFSSL_ENTER("DecodeCertExtensions"); if (input == NULL || sz == 0) return BAD_FUNC_ARG; if (input[idx++] != ASN_EXTENSIONS) { WOLFSSL_MSG("\tfail: should be an EXTENSIONS"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: invalid length"); return ASN_PARSE_E; } if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE (1)"); return ASN_PARSE_E; } while (idx < (word32)sz) { if (GetSequence(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE"); return ASN_PARSE_E; } oid = 0; if (GetObjectId(input, &idx, &oid, sz) < 0) { WOLFSSL_MSG("\tfail: OBJECT ID"); return ASN_PARSE_E; } /* check for critical flag */ critical = 0; if (input[idx] == ASN_BOOLEAN) { int boolLength = 0; idx++; if (GetLength(input, &idx, &boolLength, sz) < 0) { WOLFSSL_MSG("\tfail: critical boolean length"); return ASN_PARSE_E; } if (input[idx++]) critical = 1; } /* process the extension based on the OID */ if (input[idx++] != ASN_OCTET_STRING) { WOLFSSL_MSG("\tfail: should be an OCTET STRING"); return ASN_PARSE_E; } if (GetLength(input, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: extension data length"); return ASN_PARSE_E; } switch (oid) { case BASIC_CA_OID: #ifdef OPENSSL_EXTRA cert->extBasicConstSet = 1; cert->extBasicConstCrit = critical; #endif if (DecodeBasicCaConstraint(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case CRL_DIST_OID: if (DecodeCrlDist(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case AUTH_INFO_OID: if (DecodeAuthInfo(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case ALT_NAMES_OID: #ifdef OPENSSL_EXTRA cert->extSubjAltNameSet = 1; cert->extSubjAltNameCrit = critical; #endif if (DecodeAltNames(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case AUTH_KEY_OID: cert->extAuthKeyIdSet = 1; #ifdef OPENSSL_EXTRA cert->extAuthKeyIdCrit = critical; #endif if (DecodeAuthKeyId(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case SUBJ_KEY_OID: cert->extSubjKeyIdSet = 1; #ifdef OPENSSL_EXTRA cert->extSubjKeyIdCrit = critical; #endif if (DecodeSubjKeyId(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case CERT_POLICY_OID: WOLFSSL_MSG("Certificate Policy extension not supported yet."); #ifdef WOLFSSL_SEP #ifdef OPENSSL_EXTRA cert->extCertPolicySet = 1; cert->extCertPolicyCrit = critical; #endif #endif #if defined(WOLFSSL_SEP) || defined(WOLFSSL_CERT_EXT) if (DecodeCertPolicy(&input[idx], length, cert) < 0) return ASN_PARSE_E; #endif break; case KEY_USAGE_OID: cert->extKeyUsageSet = 1; #ifdef OPENSSL_EXTRA cert->extKeyUsageCrit = critical; #endif if (DecodeKeyUsage(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; case EXT_KEY_USAGE_OID: cert->extExtKeyUsageSet = 1; #ifdef OPENSSL_EXTRA cert->extExtKeyUsageCrit = critical; #endif if (DecodeExtKeyUsage(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; #ifndef IGNORE_NAME_CONSTRAINTS case NAME_CONS_OID: cert->extNameConstraintSet = 1; #ifdef OPENSSL_EXTRA cert->extNameConstraintCrit = critical; #endif if (DecodeNameConstraints(&input[idx], length, cert) < 0) return ASN_PARSE_E; break; #endif /* IGNORE_NAME_CONSTRAINTS */ case INHIBIT_ANY_OID: WOLFSSL_MSG("Inhibit anyPolicy extension not supported yet."); break; default: /* While it is a failure to not support critical extensions, * still parse the certificate ignoring the unsupported * extention to allow caller to accept it with the verify * callback. */ if (critical) criticalFail = 1; break; } idx += length; } return criticalFail ? ASN_CRIT_EXT_E : 0; } int ParseCert(DecodedCert* cert, int type, int verify, void* cm) { int ret; char* ptr; ret = ParseCertRelative(cert, type, verify, cm); if (ret < 0) return ret; if (cert->subjectCNLen > 0) { ptr = (char*) XMALLOC(cert->subjectCNLen + 1, cert->heap, DYNAMIC_TYPE_SUBJECT_CN); if (ptr == NULL) return MEMORY_E; XMEMCPY(ptr, cert->subjectCN, cert->subjectCNLen); ptr[cert->subjectCNLen] = '\0'; cert->subjectCN = ptr; cert->subjectCNStored = 1; } if (cert->keyOID == RSAk && cert->publicKey != NULL && cert->pubKeySize > 0) { ptr = (char*) XMALLOC(cert->pubKeySize, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY); if (ptr == NULL) return MEMORY_E; XMEMCPY(ptr, cert->publicKey, cert->pubKeySize); cert->publicKey = (byte *)ptr; cert->pubKeyStored = 1; } return ret; } /* from SSL proper, for locking can't do find here anymore */ #ifdef __cplusplus extern "C" { #endif WOLFSSL_LOCAL Signer* GetCA(void* signers, byte* hash); #ifndef NO_SKID WOLFSSL_LOCAL Signer* GetCAByName(void* signers, byte* hash); #endif #ifdef __cplusplus } #endif #ifdef WOLFCRYPT_ONLY /* dummy functions, not using wolfSSL so don't need actual ones */ Signer* GetCA(void* signers, byte* hash) { (void)hash; return (Signer*)signers; } #ifndef NO_SKID Signer* GetCAByName(void* signers, byte* hash) { (void)hash; return (Signer*)signers; } #endif /* NO_SKID */ #endif /* WOLFCRYPT_ONLY */ int ParseCertRelative(DecodedCert* cert, int type, int verify, void* cm) { word32 confirmOID; int ret; int badDate = 0; int criticalExt = 0; if ((ret = DecodeToKey(cert, verify)) < 0) { if (ret == ASN_BEFORE_DATE_E || ret == ASN_AFTER_DATE_E) badDate = ret; else return ret; } WOLFSSL_MSG("Parsed Past Key"); if (cert->srcIdx < cert->sigIndex) { #ifndef ALLOW_V1_EXTENSIONS if (cert->version < 2) { WOLFSSL_MSG(" v1 and v2 certs not allowed extensions"); return ASN_VERSION_E; } #endif /* save extensions */ cert->extensions = &cert->source[cert->srcIdx]; cert->extensionsSz = cert->sigIndex - cert->srcIdx; cert->extensionsIdx = cert->srcIdx; /* for potential later use */ if ((ret = DecodeCertExtensions(cert)) < 0) { if (ret == ASN_CRIT_EXT_E) criticalExt = ret; else return ret; } /* advance past extensions */ cert->srcIdx = cert->sigIndex; } if ((ret = GetAlgoId(cert->source, &cert->srcIdx, &confirmOID, cert->maxIdx)) < 0) return ret; if ((ret = GetSignature(cert)) < 0) return ret; if (confirmOID != cert->signatureOID) return ASN_SIG_OID_E; #ifndef NO_SKID if (cert->extSubjKeyIdSet == 0 && cert->publicKey != NULL && cert->pubKeySize > 0) { #ifdef NO_SHA ret = wc_Sha256Hash(cert->publicKey, cert->pubKeySize, cert->extSubjKeyId); #else ret = wc_ShaHash(cert->publicKey, cert->pubKeySize, cert->extSubjKeyId); #endif if (ret != 0) return ret; } #endif if (verify && type != CA_TYPE) { Signer* ca = NULL; #ifndef NO_SKID if (cert->extAuthKeyIdSet) ca = GetCA(cm, cert->extAuthKeyId); if (ca == NULL) ca = GetCAByName(cm, cert->issuerHash); #else /* NO_SKID */ ca = GetCA(cm, cert->issuerHash); #endif /* NO SKID */ WOLFSSL_MSG("About to verify certificate signature"); if (ca) { #ifdef HAVE_OCSP /* Need the ca's public key hash for OCSP */ #ifdef NO_SHA ret = wc_Sha256Hash(ca->publicKey, ca->pubKeySize, cert->issuerKeyHash); #else /* NO_SHA */ ret = wc_ShaHash(ca->publicKey, ca->pubKeySize, cert->issuerKeyHash); #endif /* NO_SHA */ if (ret != 0) return ret; #endif /* HAVE_OCSP */ /* try to confirm/verify signature */ if (!ConfirmSignature(cert->source + cert->certBegin, cert->sigIndex - cert->certBegin, ca->publicKey, ca->pubKeySize, ca->keyOID, cert->signature, cert->sigLength, cert->signatureOID, cert->heap)) { WOLFSSL_MSG("Confirm signature failed"); return ASN_SIG_CONFIRM_E; } #ifndef IGNORE_NAME_CONSTRAINTS /* check that this cert's name is permitted by the signer's * name constraints */ if (!ConfirmNameConstraints(ca, cert)) { WOLFSSL_MSG("Confirm name constraint failed"); return ASN_NAME_INVALID_E; } #endif /* IGNORE_NAME_CONSTRAINTS */ } else { /* no signer */ WOLFSSL_MSG("No CA signer to verify with"); return ASN_NO_SIGNER_E; } } if (badDate != 0) return badDate; if (criticalExt != 0) return criticalExt; return 0; } /* Create and init an new signer */ Signer* MakeSigner(void* heap) { Signer* signer = (Signer*) XMALLOC(sizeof(Signer), heap, DYNAMIC_TYPE_SIGNER); if (signer) { signer->pubKeySize = 0; signer->keyOID = 0; signer->publicKey = NULL; signer->nameLen = 0; signer->name = NULL; #ifndef IGNORE_NAME_CONSTRAINTS signer->permittedNames = NULL; signer->excludedNames = NULL; #endif /* IGNORE_NAME_CONSTRAINTS */ signer->next = NULL; } (void)heap; return signer; } /* Free an individual signer */ void FreeSigner(Signer* signer, void* heap) { XFREE(signer->name, heap, DYNAMIC_TYPE_SUBJECT_CN); XFREE(signer->publicKey, heap, DYNAMIC_TYPE_PUBLIC_KEY); #ifndef IGNORE_NAME_CONSTRAINTS if (signer->permittedNames) FreeNameSubtrees(signer->permittedNames, heap); if (signer->excludedNames) FreeNameSubtrees(signer->excludedNames, heap); #endif XFREE(signer, heap, DYNAMIC_TYPE_SIGNER); (void)heap; } /* Free the whole singer table with number of rows */ void FreeSignerTable(Signer** table, int rows, void* heap) { int i; for (i = 0; i < rows; i++) { Signer* signer = table[i]; while (signer) { Signer* next = signer->next; FreeSigner(signer, heap); signer = next; } table[i] = NULL; } } WOLFSSL_LOCAL int SetMyVersion(word32 version, byte* output, int header) { int i = 0; if (output == NULL) return BAD_FUNC_ARG; if (header) { output[i++] = ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED; output[i++] = ASN_BIT_STRING; } output[i++] = ASN_INTEGER; output[i++] = 0x01; output[i++] = (byte)version; return i; } WOLFSSL_LOCAL int SetSerialNumber(const byte* sn, word32 snSz, byte* output) { int result = 0; WOLFSSL_ENTER("SetSerialNumber"); if (sn == NULL || output == NULL) return BAD_FUNC_ARG; if (snSz <= EXTERNAL_SERIAL_SIZE) { output[0] = ASN_INTEGER; /* The serial number is always positive. When encoding the * INTEGER, if the MSB is 1, add a padding zero to keep the * number positive. */ if (sn[0] & 0x80) { output[1] = (byte)snSz + 1; output[2] = 0; XMEMCPY(&output[3], sn, snSz); result = snSz + 3; } else { output[1] = (byte)snSz; XMEMCPY(&output[2], sn, snSz); result = snSz + 2; } } return result; } const char* BEGIN_CERT = "-----BEGIN CERTIFICATE-----"; const char* END_CERT = "-----END CERTIFICATE-----"; const char* BEGIN_CERT_REQ = "-----BEGIN CERTIFICATE REQUEST-----"; const char* END_CERT_REQ = "-----END CERTIFICATE REQUEST-----"; const char* BEGIN_DH_PARAM = "-----BEGIN DH PARAMETERS-----"; const char* END_DH_PARAM = "-----END DH PARAMETERS-----"; const char* BEGIN_X509_CRL = "-----BEGIN X509 CRL-----"; const char* END_X509_CRL = "-----END X509 CRL-----"; const char* BEGIN_RSA_PRIV = "-----BEGIN RSA PRIVATE KEY-----"; const char* END_RSA_PRIV = "-----END RSA PRIVATE KEY-----"; const char* BEGIN_PRIV_KEY = "-----BEGIN PRIVATE KEY-----"; const char* END_PRIV_KEY = "-----END PRIVATE KEY-----"; const char* BEGIN_ENC_PRIV_KEY = "-----BEGIN ENCRYPTED PRIVATE KEY-----"; const char* END_ENC_PRIV_KEY = "-----END ENCRYPTED PRIVATE KEY-----"; const char* BEGIN_EC_PRIV = "-----BEGIN EC PRIVATE KEY-----"; const char* END_EC_PRIV = "-----END EC PRIVATE KEY-----"; const char* BEGIN_DSA_PRIV = "-----BEGIN DSA PRIVATE KEY-----"; const char* END_DSA_PRIV = "-----END DSA PRIVATE KEY-----"; const char* BEGIN_PUB_KEY = "-----BEGIN PUBLIC KEY-----"; const char* END_PUB_KEY = "-----END PUBLIC KEY-----"; #if defined(WOLFSSL_KEY_GEN) || defined(WOLFSSL_CERT_GEN) /* Used for compatibility API */ int wc_DerToPem(const byte* der, word32 derSz, byte* output, word32 outSz, int type) { return wc_DerToPemEx(der, derSz, output, outSz, NULL, type); } /* convert der buffer to pem into output, can't do inplace, der and output need to be different */ int wc_DerToPemEx(const byte* der, word32 derSz, byte* output, word32 outSz, byte *cipher_info, int type) { #ifdef WOLFSSL_SMALL_STACK char* header = NULL; char* footer = NULL; #else char header[40 + HEADER_ENCRYPTED_KEY_SIZE]; char footer[40]; #endif int headerLen = 40 + HEADER_ENCRYPTED_KEY_SIZE; int footerLen = 40; int i; int err; int outLen; /* return length or error */ if (der == output) /* no in place conversion */ return BAD_FUNC_ARG; #ifdef WOLFSSL_SMALL_STACK header = (char*)XMALLOC(headerLen, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (header == NULL) return MEMORY_E; footer = (char*)XMALLOC(footerLen, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (footer == NULL) { XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #endif if (type == CERT_TYPE) { XSTRNCPY(header, BEGIN_CERT, headerLen); XSTRNCAT(header, "\n", 1); XSTRNCPY(footer, END_CERT, footerLen); XSTRNCAT(footer, "\n", 1); } else if (type == PRIVATEKEY_TYPE) { XSTRNCPY(header, BEGIN_RSA_PRIV, headerLen); XSTRNCAT(header, "\n", 1); XSTRNCPY(footer, END_RSA_PRIV, footerLen); XSTRNCAT(footer, "\n", 1); } #ifndef NO_DSA else if (type == DSA_PRIVATEKEY_TYPE) { XSTRNCPY(header, BEGIN_DSA_PRIV, headerLen); XSTRNCAT(header, "\n", 1); XSTRNCPY(footer, END_DSA_PRIV, footerLen); XSTRNCAT(footer, "\n", 1); } #endif #ifdef HAVE_ECC else if (type == ECC_PRIVATEKEY_TYPE) { XSTRNCPY(header, BEGIN_EC_PRIV, headerLen); XSTRNCAT(header, "\n", 1); XSTRNCPY(footer, END_EC_PRIV, footerLen); XSTRNCAT(footer, "\n", 1); } #endif #ifdef WOLFSSL_CERT_REQ else if (type == CERTREQ_TYPE) { XSTRNCPY(header, BEGIN_CERT_REQ, headerLen); XSTRNCAT(header, "\n", 1); XSTRNCPY(footer, END_CERT_REQ, footerLen); XSTRNCAT(footer, "\n", 1); } #endif else { #ifdef WOLFSSL_SMALL_STACK XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BAD_FUNC_ARG; } /* extra header information for encrypted key */ if (cipher_info != NULL) { XSTRNCAT(header, "Proc-Type: 4,ENCRYPTED\n", 23); XSTRNCAT(header, "DEK-Info: ", 10); XSTRNCAT(header, (char*)cipher_info, XSTRLEN((char*)cipher_info)); XSTRNCAT(header, "\n\n", 2); } headerLen = (int)XSTRLEN(header); footerLen = (int)XSTRLEN(footer); if (!der || !output) { #ifdef WOLFSSL_SMALL_STACK XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BAD_FUNC_ARG; } /* don't even try if outSz too short */ if (outSz < headerLen + footerLen + derSz) { #ifdef WOLFSSL_SMALL_STACK XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BAD_FUNC_ARG; } /* header */ XMEMCPY(output, header, headerLen); i = headerLen; #ifdef WOLFSSL_SMALL_STACK XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif /* body */ outLen = outSz - (headerLen + footerLen); /* input to Base64_Encode */ if ( (err = Base64_Encode(der, derSz, output + i, (word32*)&outLen)) < 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return err; } i += outLen; /* footer */ if ( (i + footerLen) > (int)outSz) { #ifdef WOLFSSL_SMALL_STACK XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BAD_FUNC_ARG; } XMEMCPY(output + i, footer, footerLen); #ifdef WOLFSSL_SMALL_STACK XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return outLen + headerLen + footerLen; } #endif /* WOLFSSL_KEY_GEN || WOLFSSL_CERT_GEN */ #if !defined(NO_RSA) && (defined(WOLFSSL_CERT_GEN) || (defined(WOLFSSL_KEY_GEN) && !defined(HAVE_USER_RSA))) /* USER RSA ifdef portions used instead of refactor in consideration for possible fips build */ /* Write a public RSA key to output */ static int SetRsaPublicKey(byte* output, RsaKey* key, int outLen, int with_header) { #ifdef WOLFSSL_SMALL_STACK byte* n = NULL; byte* e = NULL; #else byte n[MAX_RSA_INT_SZ]; byte e[MAX_RSA_E_SZ]; #endif byte seq[MAX_SEQ_SZ]; byte len[MAX_LENGTH_SZ + 1]; /* trailing 0 */ int nSz; int eSz; int seqSz; int lenSz; int idx; int rawLen; int leadingBit; int err; if (output == NULL || key == NULL || outLen < MAX_SEQ_SZ) return BAD_FUNC_ARG; /* n */ #ifdef WOLFSSL_SMALL_STACK n = (byte*)XMALLOC(MAX_RSA_INT_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (n == NULL) return MEMORY_E; #endif #ifdef HAVE_USER_RSA leadingBit = wc_Rsa_leading_bit(key->n); rawLen = wc_Rsa_unsigned_bin_size(key->n) + leadingBit; #else leadingBit = mp_leading_bit(&key->n); rawLen = mp_unsigned_bin_size(&key->n) + leadingBit; #endif n[0] = ASN_INTEGER; nSz = SetLength(rawLen, n + 1) + 1; /* int tag */ if ( (nSz + rawLen) < MAX_RSA_INT_SZ) { if (leadingBit) n[nSz] = 0; #ifdef HAVE_USER_RSA err = wc_Rsa_to_unsigned_bin(key->n, n + nSz, rawLen); #else err = mp_to_unsigned_bin(&key->n, n + nSz + leadingBit); #endif if (err == MP_OKAY) nSz += rawLen; else { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return MP_TO_E; } } else { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } /* e */ #ifdef WOLFSSL_SMALL_STACK e = (byte*)XMALLOC(MAX_RSA_E_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (e == NULL) { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return MEMORY_E; } #endif #ifdef HAVE_USER_RSA leadingBit = wc_Rsa_leading_bit(key->e); rawLen = wc_Rsa_unsigned_bin_size(key->e) + leadingBit; #else leadingBit = mp_leading_bit(&key->e); rawLen = mp_unsigned_bin_size(&key->e) + leadingBit; #endif e[0] = ASN_INTEGER; eSz = SetLength(rawLen, e + 1) + 1; /* int tag */ if ( (eSz + rawLen) < MAX_RSA_E_SZ) { if (leadingBit) e[eSz] = 0; #ifdef HAVE_USER_RSA err = wc_Rsa_to_unsigned_bin(key->e, e + eSz, rawLen); #else err = mp_to_unsigned_bin(&key->e, e + eSz + leadingBit); #endif if (err == MP_OKAY) eSz += rawLen; else { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return MP_TO_E; } } else { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } seqSz = SetSequence(nSz + eSz, seq); /* check output size */ if ( (seqSz + nSz + eSz) > outLen) { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } /* headers */ if (with_header) { int algoSz; #ifdef WOLFSSL_SMALL_STACK byte* algo = NULL; algo = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (algo == NULL) { XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #else byte algo[MAX_ALGO_SZ]; #endif algoSz = SetAlgoID(RSAk, algo, keyType, 0); lenSz = SetLength(seqSz + nSz + eSz + 1, len); len[lenSz++] = 0; /* trailing 0 */ /* write, 1 is for ASN_BIT_STRING */ idx = SetSequence(nSz + eSz + seqSz + lenSz + 1 + algoSz, output); /* check output size */ if ( (idx + algoSz + 1 + lenSz + seqSz + nSz + eSz) > outLen) { #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(algo, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } /* algo */ XMEMCPY(output + idx, algo, algoSz); idx += algoSz; /* bit string */ output[idx++] = ASN_BIT_STRING; /* length */ XMEMCPY(output + idx, len, lenSz); idx += lenSz; #ifdef WOLFSSL_SMALL_STACK XFREE(algo, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif } else idx = 0; /* seq */ XMEMCPY(output + idx, seq, seqSz); idx += seqSz; /* n */ XMEMCPY(output + idx, n, nSz); idx += nSz; /* e */ XMEMCPY(output + idx, e, eSz); idx += eSz; #ifdef WOLFSSL_SMALL_STACK XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return idx; } #endif /* !defined(NO_RSA) && (defined(WOLFSSL_CERT_GEN) || defined(WOLFSSL_KEY_GEN)) */ #if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA) && !defined(HAVE_USER_RSA) static mp_int* GetRsaInt(RsaKey* key, int idx) { if (idx == 0) return &key->n; if (idx == 1) return &key->e; if (idx == 2) return &key->d; if (idx == 3) return &key->p; if (idx == 4) return &key->q; if (idx == 5) return &key->dP; if (idx == 6) return &key->dQ; if (idx == 7) return &key->u; return NULL; } /* Release Tmp RSA resources */ static INLINE void FreeTmpRsas(byte** tmps, void* heap) { int i; (void)heap; for (i = 0; i < RSA_INTS; i++) XFREE(tmps[i], heap, DYNAMIC_TYPE_RSA); } /* Convert RsaKey key to DER format, write to output (inLen), return bytes written */ int wc_RsaKeyToDer(RsaKey* key, byte* output, word32 inLen) { word32 seqSz, verSz, rawLen, intTotalLen = 0; word32 sizes[RSA_INTS]; int i, j, outLen, ret = 0, lbit; byte seq[MAX_SEQ_SZ]; byte ver[MAX_VERSION_SZ]; byte* tmps[RSA_INTS]; if (!key || !output) return BAD_FUNC_ARG; if (key->type != RSA_PRIVATE) return BAD_FUNC_ARG; for (i = 0; i < RSA_INTS; i++) tmps[i] = NULL; /* write all big ints from key to DER tmps */ for (i = 0; i < RSA_INTS; i++) { mp_int* keyInt = GetRsaInt(key, i); /* leading zero */ if ((mp_count_bits(keyInt) & 7) == 0 || mp_iszero(keyInt) == MP_YES) lbit = 1; else lbit = 0; rawLen = mp_unsigned_bin_size(keyInt) + lbit; tmps[i] = (byte*)XMALLOC(rawLen + MAX_SEQ_SZ, key->heap, DYNAMIC_TYPE_RSA); if (tmps[i] == NULL) { ret = MEMORY_E; break; } tmps[i][0] = ASN_INTEGER; sizes[i] = SetLength(rawLen, tmps[i] + 1) + 1 + lbit; /* tag & lbit */ if (sizes[i] <= MAX_SEQ_SZ) { int err; /* leading zero */ if (lbit) tmps[i][sizes[i]-1] = 0x00; err = mp_to_unsigned_bin(keyInt, tmps[i] + sizes[i]); if (err == MP_OKAY) { sizes[i] += (rawLen-lbit); /* lbit included in rawLen */ intTotalLen += sizes[i]; } else { ret = err; break; } } else { ret = ASN_INPUT_E; break; } } if (ret != 0) { FreeTmpRsas(tmps, key->heap); return ret; } /* make headers */ verSz = SetMyVersion(0, ver, FALSE); seqSz = SetSequence(verSz + intTotalLen, seq); outLen = seqSz + verSz + intTotalLen; if (outLen > (int)inLen) return BAD_FUNC_ARG; /* write to output */ XMEMCPY(output, seq, seqSz); j = seqSz; XMEMCPY(output + j, ver, verSz); j += verSz; for (i = 0; i < RSA_INTS; i++) { XMEMCPY(output + j, tmps[i], sizes[i]); j += sizes[i]; } FreeTmpRsas(tmps, key->heap); return outLen; } /* Convert Rsa Public key to DER format, write to output (inLen), return bytes written */ int wc_RsaKeyToPublicDer(RsaKey* key, byte* output, word32 inLen) { return SetRsaPublicKey(output, key, inLen, 1); } #endif /* WOLFSSL_KEY_GEN && !NO_RSA */ #if defined(WOLFSSL_CERT_GEN) && !defined(NO_RSA) #ifdef min #define WOLFSSL_HAVE_MIN #endif #ifndef WOLFSSL_HAVE_MIN #define WOLFSSL_HAVE_MIN static INLINE word32 min(word32 a, word32 b) { return a > b ? b : a; } #endif /* WOLFSSL_HAVE_MIN */ /* Initialize and Set Certficate defaults: version = 3 (0x2) serial = 0 sigType = SHA_WITH_RSA issuer = blank daysValid = 500 selfSigned = 1 (true) use subject as issuer subject = blank */ void wc_InitCert(Cert* cert) { cert->version = 2; /* version 3 is hex 2 */ cert->sigType = CTC_SHAwRSA; cert->daysValid = 500; cert->selfSigned = 1; cert->isCA = 0; cert->bodySz = 0; #ifdef WOLFSSL_ALT_NAMES cert->altNamesSz = 0; cert->beforeDateSz = 0; cert->afterDateSz = 0; #endif #ifdef WOLFSSL_CERT_EXT cert->skidSz = 0; cert->akidSz = 0; cert->keyUsage = 0; cert->certPoliciesNb = 0; XMEMSET(cert->akid, 0, CTC_MAX_AKID_SIZE); XMEMSET(cert->skid, 0, CTC_MAX_SKID_SIZE); XMEMSET(cert->certPolicies, 0, CTC_MAX_CERTPOL_NB*CTC_MAX_CERTPOL_SZ); #endif cert->keyType = RSA_KEY; XMEMSET(cert->serial, 0, CTC_SERIAL_SIZE); cert->issuer.country[0] = '\0'; cert->issuer.countryEnc = CTC_PRINTABLE; cert->issuer.state[0] = '\0'; cert->issuer.stateEnc = CTC_UTF8; cert->issuer.locality[0] = '\0'; cert->issuer.localityEnc = CTC_UTF8; cert->issuer.sur[0] = '\0'; cert->issuer.surEnc = CTC_UTF8; cert->issuer.org[0] = '\0'; cert->issuer.orgEnc = CTC_UTF8; cert->issuer.unit[0] = '\0'; cert->issuer.unitEnc = CTC_UTF8; cert->issuer.commonName[0] = '\0'; cert->issuer.commonNameEnc = CTC_UTF8; cert->issuer.email[0] = '\0'; cert->subject.country[0] = '\0'; cert->subject.countryEnc = CTC_PRINTABLE; cert->subject.state[0] = '\0'; cert->subject.stateEnc = CTC_UTF8; cert->subject.locality[0] = '\0'; cert->subject.localityEnc = CTC_UTF8; cert->subject.sur[0] = '\0'; cert->subject.surEnc = CTC_UTF8; cert->subject.org[0] = '\0'; cert->subject.orgEnc = CTC_UTF8; cert->subject.unit[0] = '\0'; cert->subject.unitEnc = CTC_UTF8; cert->subject.commonName[0] = '\0'; cert->subject.commonNameEnc = CTC_UTF8; cert->subject.email[0] = '\0'; #ifdef WOLFSSL_CERT_REQ cert->challengePw[0] ='\0'; #endif } /* DER encoded x509 Certificate */ typedef struct DerCert { byte size[MAX_LENGTH_SZ]; /* length encoded */ byte version[MAX_VERSION_SZ]; /* version encoded */ byte serial[CTC_SERIAL_SIZE + MAX_LENGTH_SZ]; /* serial number encoded */ byte sigAlgo[MAX_ALGO_SZ]; /* signature algo encoded */ byte issuer[ASN_NAME_MAX]; /* issuer encoded */ byte subject[ASN_NAME_MAX]; /* subject encoded */ byte validity[MAX_DATE_SIZE*2 + MAX_SEQ_SZ*2]; /* before and after dates */ byte publicKey[MAX_PUBLIC_KEY_SZ]; /* rsa / ntru public key encoded */ byte ca[MAX_CA_SZ]; /* basic constraint CA true size */ byte extensions[MAX_EXTENSIONS_SZ]; /* all extensions */ #ifdef WOLFSSL_CERT_EXT byte skid[MAX_KID_SZ]; /* Subject Key Identifier extension */ byte akid[MAX_KID_SZ]; /* Authority Key Identifier extension */ byte keyUsage[MAX_KEYUSAGE_SZ]; /* Key Usage extension */ byte certPolicies[MAX_CERTPOL_NB*MAX_CERTPOL_SZ]; /* Certificate Policies */ #endif #ifdef WOLFSSL_CERT_REQ byte attrib[MAX_ATTRIB_SZ]; /* Cert req attributes encoded */ #endif #ifdef WOLFSSL_ALT_NAMES byte altNames[CTC_MAX_ALT_SIZE]; /* Alternative Names encoded */ #endif int sizeSz; /* encoded size length */ int versionSz; /* encoded version length */ int serialSz; /* encoded serial length */ int sigAlgoSz; /* enocded sig alog length */ int issuerSz; /* encoded issuer length */ int subjectSz; /* encoded subject length */ int validitySz; /* encoded validity length */ int publicKeySz; /* encoded public key length */ int caSz; /* encoded CA extension length */ #ifdef WOLFSSL_CERT_EXT int skidSz; /* encoded SKID extension length */ int akidSz; /* encoded SKID extension length */ int keyUsageSz; /* encoded KeyUsage extension length */ int certPoliciesSz; /* encoded CertPolicies extension length*/ #endif #ifdef WOLFSSL_ALT_NAMES int altNamesSz; /* encoded AltNames extension length */ #endif int extensionsSz; /* encoded extensions total length */ int total; /* total encoded lengths */ #ifdef WOLFSSL_CERT_REQ int attribSz; #endif } DerCert; #ifdef WOLFSSL_CERT_REQ /* Write a set header to output */ static word32 SetUTF8String(word32 len, byte* output) { output[0] = ASN_UTF8STRING; return SetLength(len, output + 1) + 1; } #endif /* WOLFSSL_CERT_REQ */ /* Write a serial number to output */ static int SetSerial(const byte* serial, byte* output) { int length = 0; output[length++] = ASN_INTEGER; length += SetLength(CTC_SERIAL_SIZE, &output[length]); XMEMCPY(&output[length], serial, CTC_SERIAL_SIZE); return length + CTC_SERIAL_SIZE; } #ifdef HAVE_ECC /* Write a public ECC key to output */ static int SetEccPublicKey(byte* output, ecc_key* key, int with_header) { byte len[MAX_LENGTH_SZ + 1]; /* trailing 0 */ int algoSz; int curveSz; int lenSz; int idx; word32 pubSz = ECC_BUFSIZE; #ifdef WOLFSSL_SMALL_STACK byte* algo = NULL; byte* curve = NULL; byte* pub = NULL; #else byte algo[MAX_ALGO_SZ]; byte curve[MAX_ALGO_SZ]; byte pub[ECC_BUFSIZE]; #endif #ifdef WOLFSSL_SMALL_STACK pub = (byte*)XMALLOC(ECC_BUFSIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (pub == NULL) return MEMORY_E; #endif int ret = wc_ecc_export_x963(key, pub, &pubSz); if (ret != 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } /* headers */ if (with_header) { #ifdef WOLFSSL_SMALL_STACK curve = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (curve == NULL) { XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #endif curveSz = SetCurve(key, curve); if (curveSz <= 0) { #ifdef WOLFSSL_SMALL_STACK XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return curveSz; } #ifdef WOLFSSL_SMALL_STACK algo = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (algo == NULL) { XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #endif algoSz = SetAlgoID(ECDSAk, algo, keyType, curveSz); lenSz = SetLength(pubSz + 1, len); len[lenSz++] = 0; /* trailing 0 */ /* write, 1 is for ASN_BIT_STRING */ idx = SetSequence(pubSz + curveSz + lenSz + 1 + algoSz, output); /* algo */ XMEMCPY(output + idx, algo, algoSz); idx += algoSz; /* curve */ XMEMCPY(output + idx, curve, curveSz); idx += curveSz; /* bit string */ output[idx++] = ASN_BIT_STRING; /* length */ XMEMCPY(output + idx, len, lenSz); idx += lenSz; } else idx = 0; /* pub */ XMEMCPY(output + idx, pub, pubSz); idx += pubSz; #ifdef WOLFSSL_SMALL_STACK if (with_header) { XFREE(algo, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER); } XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return idx; } #endif /* HAVE_ECC */ static INLINE byte itob(int number) { return (byte)number + 0x30; } /* write time to output, format */ static void SetTime(struct tm* date, byte* output) { int i = 0; output[i++] = itob((date->tm_year % 10000) / 1000); output[i++] = itob((date->tm_year % 1000) / 100); output[i++] = itob((date->tm_year % 100) / 10); output[i++] = itob( date->tm_year % 10); output[i++] = itob(date->tm_mon / 10); output[i++] = itob(date->tm_mon % 10); output[i++] = itob(date->tm_mday / 10); output[i++] = itob(date->tm_mday % 10); output[i++] = itob(date->tm_hour / 10); output[i++] = itob(date->tm_hour % 10); output[i++] = itob(date->tm_min / 10); output[i++] = itob(date->tm_min % 10); output[i++] = itob(date->tm_sec / 10); output[i++] = itob(date->tm_sec % 10); output[i] = 'Z'; /* Zulu profile */ } #ifdef WOLFSSL_ALT_NAMES /* Copy Dates from cert, return bytes written */ static int CopyValidity(byte* output, Cert* cert) { int seqSz; WOLFSSL_ENTER("CopyValidity"); /* headers and output */ seqSz = SetSequence(cert->beforeDateSz + cert->afterDateSz, output); XMEMCPY(output + seqSz, cert->beforeDate, cert->beforeDateSz); XMEMCPY(output + seqSz + cert->beforeDateSz, cert->afterDate, cert->afterDateSz); return seqSz + cert->beforeDateSz + cert->afterDateSz; } #endif /* for systems where mktime() doesn't normalize fully */ static void RebuildTime(time_t* in, struct tm* out) { #ifdef FREESCALE_MQX out = localtime_r(in, out); #else (void)in; (void)out; #endif } /* Set Date validity from now until now + daysValid * return size in bytes written to output, 0 on error */ static int SetValidity(byte* output, int daysValid) { byte before[MAX_DATE_SIZE]; byte after[MAX_DATE_SIZE]; int beforeSz; int afterSz; int seqSz; time_t ticks; time_t normalTime; struct tm* now; struct tm* tmpTime = NULL; struct tm local; #if defined(FREESCALE_MQX) || defined(TIME_OVERRIDES) /* for use with gmtime_r */ struct tm tmpTimeStorage; tmpTime = &tmpTimeStorage; #else (void)tmpTime; #endif ticks = XTIME(0); now = XGMTIME(&ticks, tmpTime); if (now == NULL) { WOLFSSL_MSG("XGMTIME failed"); return 0; /* error */ } /* before now */ local = *now; before[0] = ASN_GENERALIZED_TIME; beforeSz = SetLength(ASN_GEN_TIME_SZ, before + 1) + 1; /* gen tag */ /* subtract 1 day for more compliance */ local.tm_mday -= 1; normalTime = mktime(&local); RebuildTime(&normalTime, &local); /* adjust */ local.tm_year += 1900; local.tm_mon += 1; SetTime(&local, before + beforeSz); beforeSz += ASN_GEN_TIME_SZ; /* after now + daysValid */ local = *now; after[0] = ASN_GENERALIZED_TIME; afterSz = SetLength(ASN_GEN_TIME_SZ, after + 1) + 1; /* gen tag */ /* add daysValid */ local.tm_mday += daysValid; normalTime = mktime(&local); RebuildTime(&normalTime, &local); /* adjust */ local.tm_year += 1900; local.tm_mon += 1; SetTime(&local, after + afterSz); afterSz += ASN_GEN_TIME_SZ; /* headers and output */ seqSz = SetSequence(beforeSz + afterSz, output); XMEMCPY(output + seqSz, before, beforeSz); XMEMCPY(output + seqSz + beforeSz, after, afterSz); return seqSz + beforeSz + afterSz; } /* ASN Encoded Name field */ typedef struct EncodedName { int nameLen; /* actual string value length */ int totalLen; /* total encoded length */ int type; /* type of name */ int used; /* are we actually using this one */ byte encoded[CTC_NAME_SIZE * 2]; /* encoding */ } EncodedName; /* Get Which Name from index */ static const char* GetOneName(CertName* name, int idx) { switch (idx) { case 0: return name->country; case 1: return name->state; case 2: return name->locality; case 3: return name->sur; case 4: return name->org; case 5: return name->unit; case 6: return name->commonName; case 7: return name->email; default: return 0; } } /* Get Which Name Encoding from index */ static char GetNameType(CertName* name, int idx) { switch (idx) { case 0: return name->countryEnc; case 1: return name->stateEnc; case 2: return name->localityEnc; case 3: return name->surEnc; case 4: return name->orgEnc; case 5: return name->unitEnc; case 6: return name->commonNameEnc; default: return 0; } } /* Get ASN Name from index */ static byte GetNameId(int idx) { switch (idx) { case 0: return ASN_COUNTRY_NAME; case 1: return ASN_STATE_NAME; case 2: return ASN_LOCALITY_NAME; case 3: return ASN_SUR_NAME; case 4: return ASN_ORG_NAME; case 5: return ASN_ORGUNIT_NAME; case 6: return ASN_COMMON_NAME; case 7: /* email uses different id type */ return 0; default: return 0; } } /* Extensions ::= SEQUENCE OF Extension Extension ::= SEQUENCE { extnId OBJECT IDENTIFIER, critical BOOLEAN DEFAULT FALSE, extnValue OCTET STRING } */ /* encode all extensions, return total bytes written */ static int SetExtensions(byte* out, word32 outSz, int *IdxInOut, const byte* ext, int extSz) { if (out == NULL || IdxInOut == NULL || ext == NULL) return BAD_FUNC_ARG; if (outSz < (word32)(*IdxInOut+extSz)) return BUFFER_E; XMEMCPY(&out[*IdxInOut], ext, extSz); /* extensions */ *IdxInOut += extSz; return *IdxInOut; } /* encode extensions header, return total bytes written */ static int SetExtensionsHeader(byte* out, word32 outSz, int extSz) { byte sequence[MAX_SEQ_SZ]; byte len[MAX_LENGTH_SZ]; int seqSz, lenSz, idx = 0; if (out == NULL) return BAD_FUNC_ARG; if (outSz < 3) return BUFFER_E; seqSz = SetSequence(extSz, sequence); /* encode extensions length provided */ lenSz = SetLength(extSz+seqSz, len); if (outSz < (word32)(lenSz+seqSz+1)) return BUFFER_E; out[idx++] = ASN_EXTENSIONS; /* extensions id */ XMEMCPY(&out[idx], len, lenSz); /* length */ idx += lenSz; XMEMCPY(&out[idx], sequence, seqSz); /* sequence */ idx += seqSz; return idx; } /* encode CA basic constraint true, return total bytes written */ static int SetCa(byte* out, word32 outSz) { static const byte ca[] = { 0x30, 0x0c, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff }; if (out == NULL) return BAD_FUNC_ARG; if (outSz < sizeof(ca)) return BUFFER_E; XMEMCPY(out, ca, sizeof(ca)); return (int)sizeof(ca); } #ifdef WOLFSSL_CERT_EXT /* encode OID and associated value, return total bytes written */ static int SetOidValue(byte* out, word32 outSz, const byte *oid, word32 oidSz, byte *in, word32 inSz) { int idx = 0; if (out == NULL || oid == NULL || in == NULL) return BAD_FUNC_ARG; if (outSz < 3) return BUFFER_E; /* sequence, + 1 => byte to put value size */ idx = SetSequence(inSz + oidSz + 1, out); if (outSz < idx + inSz + oidSz + 1) return BUFFER_E; XMEMCPY(out+idx, oid, oidSz); idx += oidSz; out[idx++] = (byte)inSz; XMEMCPY(out+idx, in, inSz); return (idx+inSz); } /* encode Subject Key Identifier, return total bytes written * RFC5280 : non-critical */ static int SetSKID(byte* output, word32 outSz, byte *input, word32 length) { byte skid_len[MAX_LENGTH_SZ]; byte skid_enc_len[MAX_LENGTH_SZ]; int idx = 0, skid_lenSz, skid_enc_lenSz; static const byte skid_oid[] = { 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04 }; if (output == NULL || input == NULL) return BAD_FUNC_ARG; /* length of value */ skid_lenSz = SetLength(length, skid_len); /* length of encoded value */ skid_enc_lenSz = SetLength(length + skid_lenSz + 1, skid_enc_len); if (outSz < 3) return BUFFER_E; /* sequence, + 1 => byte to put type size */ idx = SetSequence(length + sizeof(skid_oid) + skid_lenSz + skid_enc_lenSz+1, output); if (outSz < length + sizeof(skid_oid) + skid_lenSz + skid_enc_lenSz + 1) return BUFFER_E; /* put oid */ XMEMCPY(output+idx, skid_oid, sizeof(skid_oid)); idx += sizeof(skid_oid); /* put encoded len */ XMEMCPY(output+idx, skid_enc_len, skid_enc_lenSz); idx += skid_enc_lenSz; /* put type */ output[idx++] = ASN_OCTET_STRING; /* put value len */ XMEMCPY(output+idx, skid_len, skid_lenSz); idx += skid_lenSz; /* put value */ XMEMCPY(output+idx, input, length); idx += length; return idx; } /* encode Authority Key Identifier, return total bytes written * RFC5280 : non-critical */ static int SetAKID(byte* output, word32 outSz, byte *input, word32 length) { byte *enc_val; int ret, enc_valSz; static const byte akid_oid[] = { 0x06, 0x03, 0x55, 0x1d, 0x23, 0x04}; static const byte akid_cs[] = { 0x80 }; if (output == NULL || input == NULL) return BAD_FUNC_ARG; enc_val = (byte *)XMALLOC(length+3+sizeof(akid_cs), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (enc_val == NULL) return MEMORY_E; /* sequence for ContentSpec & value */ enc_valSz = SetOidValue(enc_val, length+3+sizeof(akid_cs), akid_cs, sizeof(akid_cs), input, length); if (enc_valSz == 0) { XFREE(enc_val, NULL, DYNAMIC_TYPE_TMP_BUFFER); return 0; } ret = SetOidValue(output, outSz, akid_oid, sizeof(akid_oid), enc_val, enc_valSz); XFREE(enc_val, NULL, DYNAMIC_TYPE_TMP_BUFFER); return ret; } /* encode Key Usage, return total bytes written * RFC5280 : critical */ static int SetKeyUsage(byte* output, word32 outSz, word16 input) { byte ku[5]; int unusedBits = 0; static const byte keyusage_oid[] = { 0x06, 0x03, 0x55, 0x1d, 0x0f, 0x01, 0x01, 0xff, 0x04}; if (output == NULL) return BAD_FUNC_ARG; /* Key Usage is a BitString */ ku[0] = ASN_BIT_STRING; /* put the Bit String size */ if (input > 255) { ku[1] = (byte)3; /* compute unused bits */ while (((((input >> 8) & 0xff) >> unusedBits) & 0x01) == 0) unusedBits++; } else { ku[1] = (byte)2; /* compute unused bits */ while (((input >> unusedBits) & 0x01) == 0) unusedBits++; } /* put unused bits value */ ku[2] = (byte)unusedBits; /* compute byte value */ ku[3] = (byte)(input & 0xff); if (input > 255) ku[4] = (byte)((input >> 8) & 0xff); return SetOidValue(output, outSz, keyusage_oid, sizeof(keyusage_oid), ku, (int)ku[1]+2); } /* Encode OID string representation to ITU-T X.690 format */ static int EncodePolicyOID(byte *out, word32 *outSz, const char *in) { word32 val, idx = 0, nb_val; char *token, *str, *ptr; word32 len; if (out == NULL || outSz == NULL || *outSz < 2 || in == NULL) return BAD_FUNC_ARG; len = (word32)XSTRLEN(in); str = (char *)XMALLOC(len+1, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (str == NULL) return MEMORY_E; XSTRNCPY(str, in, len); str[len] = 0x00; nb_val = 0; /* parse value, and set corresponding Policy OID value */ token = XSTRTOK(str, ".", &ptr); while (token != NULL) { val = (word32)atoi(token); if (nb_val == 0) { if (val > 2) { XFREE(str, NUL, DYNAMIC_TYPE_TMP_BUFFER); return ASN_OBJECT_ID_E; } out[idx] = (byte)(40 * val); } else if (nb_val == 1) { if (val > 127) { XFREE(str, NUL, DYNAMIC_TYPE_TMP_BUFFER); return ASN_OBJECT_ID_E; } if (idx > *outSz) { XFREE(str, NUL, DYNAMIC_TYPE_TMP_BUFFER); return BUFFER_E; } out[idx++] += (byte)val; } else { word32 tb = 0, x; int i = 0; byte oid[MAX_OID_SZ]; while (val >= 128) { x = val % 128; val /= 128; oid[i++] = (byte) (((tb++) ? 0x80 : 0) | x); } if ((idx+(word32)i) > *outSz) { XFREE(str, NUL, DYNAMIC_TYPE_TMP_BUFFER); return BUFFER_E; } oid[i] = (byte) (((tb++) ? 0x80 : 0) | val); /* push value in the right order */ while (i >= 0) out[idx++] = oid[i--]; } token = XSTRTOK(NULL, ".", &ptr); nb_val++; } *outSz = idx; XFREE(str, NUL, DYNAMIC_TYPE_TMP_BUFFER); return 0; } /* encode Certificate Policies, return total bytes written * each input value must be ITU-T X.690 formatted : a.b.c... * input must be an array of values with a NULL terminated for the latest * RFC5280 : non-critical */ static int SetCertificatePolicies(byte *output, word32 outputSz, char input[MAX_CERTPOL_NB][MAX_CERTPOL_SZ], word16 nb_certpol) { byte oid[MAX_OID_SZ], der_oid[MAX_CERTPOL_NB][MAX_OID_SZ], out[MAX_CERTPOL_SZ]; word32 oidSz; word32 outSz, i = 0, der_oidSz[MAX_CERTPOL_NB]; int ret; static const byte certpol_oid[] = { 0x06, 0x03, 0x55, 0x1d, 0x20, 0x04 }; static const byte oid_oid[] = { 0x06 }; if (output == NULL || input == NULL || nb_certpol > MAX_CERTPOL_NB) return BAD_FUNC_ARG; for (i = 0; i < nb_certpol; i++) { oidSz = sizeof(oid); XMEMSET(oid, 0, oidSz); ret = EncodePolicyOID(oid, &oidSz, input[i]); if (ret != 0) return ret; /* compute sequence value for the oid */ ret = SetOidValue(der_oid[i], MAX_OID_SZ, oid_oid, sizeof(oid_oid), oid, oidSz); if (ret <= 0) return ret; else der_oidSz[i] = (word32)ret; } /* concatene oid, keep two byte for sequence/size of the created value */ for (i = 0, outSz = 2; i < nb_certpol; i++) { XMEMCPY(out+outSz, der_oid[i], der_oidSz[i]); outSz += der_oidSz[i]; } /* add sequence */ ret = SetSequence(outSz-2, out); if (ret <= 0) return ret; /* add Policy OID to compute final value */ return SetOidValue(output, outputSz, certpol_oid, sizeof(certpol_oid), out, outSz); } #endif /* WOLFSSL_CERT_EXT */ #ifdef WOLFSSL_ALT_NAMES /* encode Alternative Names, return total bytes written */ static int SetAltNames(byte *out, word32 outSz, byte *input, word32 length) { if (out == NULL || input == NULL) return BAD_FUNC_ARG; if (outSz < length) return BUFFER_E; /* Alternative Names come from certificate or computed by * external function, so already encoded. Just copy value */ XMEMCPY(out, input, length); return length; } #endif /* WOLFSL_ALT_NAMES */ /* encode CertName into output, return total bytes written */ static int SetName(byte* output, word32 outputSz, CertName* name) { int totalBytes = 0, i, idx; #ifdef WOLFSSL_SMALL_STACK EncodedName* names = NULL; #else EncodedName names[NAME_ENTRIES]; #endif if (output == NULL || name == NULL) return BAD_FUNC_ARG; if (outputSz < 3) return BUFFER_E; #ifdef WOLFSSL_SMALL_STACK names = (EncodedName*)XMALLOC(sizeof(EncodedName) * NAME_ENTRIES, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (names == NULL) return MEMORY_E; #endif for (i = 0; i < NAME_ENTRIES; i++) { const char* nameStr = GetOneName(name, i); if (nameStr) { /* bottom up */ byte firstLen[MAX_LENGTH_SZ]; byte secondLen[MAX_LENGTH_SZ]; byte sequence[MAX_SEQ_SZ]; byte set[MAX_SET_SZ]; int email = i == (NAME_ENTRIES - 1) ? 1 : 0; int strLen = (int)XSTRLEN(nameStr); int thisLen = strLen; int firstSz, secondSz, seqSz, setSz; if (strLen == 0) { /* no user data for this item */ names[i].used = 0; continue; } secondSz = SetLength(strLen, secondLen); thisLen += secondSz; if (email) { thisLen += EMAIL_JOINT_LEN; thisLen ++; /* id type */ firstSz = SetLength(EMAIL_JOINT_LEN, firstLen); } else { thisLen++; /* str type */ thisLen++; /* id type */ thisLen += JOINT_LEN; firstSz = SetLength(JOINT_LEN + 1, firstLen); } thisLen += firstSz; thisLen++; /* object id */ seqSz = SetSequence(thisLen, sequence); thisLen += seqSz; setSz = SetSet(thisLen, set); thisLen += setSz; if (thisLen > (int)sizeof(names[i].encoded)) { #ifdef WOLFSSL_SMALL_STACK XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } /* store it */ idx = 0; /* set */ XMEMCPY(names[i].encoded, set, setSz); idx += setSz; /* seq */ XMEMCPY(names[i].encoded + idx, sequence, seqSz); idx += seqSz; /* asn object id */ names[i].encoded[idx++] = ASN_OBJECT_ID; /* first length */ XMEMCPY(names[i].encoded + idx, firstLen, firstSz); idx += firstSz; if (email) { const byte EMAIL_OID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x09, 0x01, 0x16 }; /* email joint id */ XMEMCPY(names[i].encoded + idx, EMAIL_OID, sizeof(EMAIL_OID)); idx += (int)sizeof(EMAIL_OID); } else { /* joint id */ byte bType = GetNameId(i); names[i].encoded[idx++] = 0x55; names[i].encoded[idx++] = 0x04; /* id type */ names[i].encoded[idx++] = bType; /* str type */ names[i].encoded[idx++] = GetNameType(name, i); } /* second length */ XMEMCPY(names[i].encoded + idx, secondLen, secondSz); idx += secondSz; /* str value */ XMEMCPY(names[i].encoded + idx, nameStr, strLen); idx += strLen; totalBytes += idx; names[i].totalLen = idx; names[i].used = 1; } else names[i].used = 0; } /* header */ idx = SetSequence(totalBytes, output); totalBytes += idx; if (totalBytes > ASN_NAME_MAX) { #ifdef WOLFSSL_SMALL_STACK XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } for (i = 0; i < NAME_ENTRIES; i++) { if (names[i].used) { if (outputSz < (word32)(idx+names[i].totalLen)) { #ifdef WOLFSSL_SMALL_STACK XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return BUFFER_E; } XMEMCPY(output + idx, names[i].encoded, names[i].totalLen); idx += names[i].totalLen; } } #ifdef WOLFSSL_SMALL_STACK XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return totalBytes; } /* encode info from cert into DER encoded format */ static int EncodeCert(Cert* cert, DerCert* der, RsaKey* rsaKey, ecc_key* eccKey, WC_RNG* rng, const byte* ntruKey, word16 ntruSz) { int ret; (void)eccKey; (void)ntruKey; (void)ntruSz; if (cert == NULL || der == NULL || rng == NULL) return BAD_FUNC_ARG; /* init */ XMEMSET(der, 0, sizeof(DerCert)); /* version */ der->versionSz = SetMyVersion(cert->version, der->version, TRUE); /* serial number */ ret = wc_RNG_GenerateBlock(rng, cert->serial, CTC_SERIAL_SIZE); if (ret != 0) return ret; cert->serial[0] = 0x01; /* ensure positive */ der->serialSz = SetSerial(cert->serial, der->serial); /* signature algo */ der->sigAlgoSz = SetAlgoID(cert->sigType, der->sigAlgo, sigType, 0); if (der->sigAlgoSz == 0) return ALGO_ID_E; /* public key */ if (cert->keyType == RSA_KEY) { if (rsaKey == NULL) return PUBLIC_KEY_E; der->publicKeySz = SetRsaPublicKey(der->publicKey, rsaKey, sizeof(der->publicKey), 1); if (der->publicKeySz <= 0) return PUBLIC_KEY_E; } #ifdef HAVE_ECC if (cert->keyType == ECC_KEY) { if (eccKey == NULL) return PUBLIC_KEY_E; der->publicKeySz = SetEccPublicKey(der->publicKey, eccKey, 1); if (der->publicKeySz <= 0) return PUBLIC_KEY_E; } #endif /* HAVE_ECC */ #ifdef HAVE_NTRU if (cert->keyType == NTRU_KEY) { word32 rc; word16 encodedSz; rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo( ntruSz, ntruKey, &encodedSz, NULL); if (rc != NTRU_OK) return PUBLIC_KEY_E; if (encodedSz > MAX_PUBLIC_KEY_SZ) return PUBLIC_KEY_E; rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo( ntruSz, ntruKey, &encodedSz, der->publicKey); if (rc != NTRU_OK) return PUBLIC_KEY_E; der->publicKeySz = encodedSz; } #endif /* HAVE_NTRU */ der->validitySz = 0; #ifdef WOLFSSL_ALT_NAMES /* date validity copy ? */ if (cert->beforeDateSz && cert->afterDateSz) { der->validitySz = CopyValidity(der->validity, cert); if (der->validitySz == 0) return DATE_E; } #endif /* date validity */ if (der->validitySz == 0) { der->validitySz = SetValidity(der->validity, cert->daysValid); if (der->validitySz == 0) return DATE_E; } /* subject name */ der->subjectSz = SetName(der->subject, sizeof(der->subject), &cert->subject); if (der->subjectSz == 0) return SUBJECT_E; /* issuer name */ der->issuerSz = SetName(der->issuer, sizeof(der->issuer), cert->selfSigned ? &cert->subject : &cert->issuer); if (der->issuerSz == 0) return ISSUER_E; /* set the extensions */ der->extensionsSz = 0; /* CA */ if (cert->isCA) { der->caSz = SetCa(der->ca, sizeof(der->ca)); if (der->caSz == 0) return CA_TRUE_E; der->extensionsSz += der->caSz; } else der->caSz = 0; #ifdef WOLFSSL_ALT_NAMES /* Alternative Name */ if (cert->altNamesSz) { der->altNamesSz = SetAltNames(der->altNames, sizeof(der->altNames), cert->altNames, cert->altNamesSz); if (der->altNamesSz == 0) return ALT_NAME_E; der->extensionsSz += der->altNamesSz; } else der->altNamesSz = 0; #endif #ifdef WOLFSSL_CERT_EXT /* SKID */ if (cert->skidSz) { /* check the provided SKID size */ if (cert->skidSz > (int)sizeof(der->skid)) return SKID_E; der->skidSz = SetSKID(der->skid, sizeof(der->skid), cert->skid, cert->skidSz); if (der->skidSz == 0) return SKID_E; der->extensionsSz += der->skidSz; } else der->skidSz = 0; /* AKID */ if (cert->akidSz) { /* check the provided AKID size */ if (cert->akidSz > (int)sizeof(der->akid)) return AKID_E; der->akidSz = SetAKID(der->akid, sizeof(der->akid), cert->akid, cert->akidSz); if (der->akidSz == 0) return AKID_E; der->extensionsSz += der->akidSz; } else der->akidSz = 0; /* Key Usage */ if (cert->keyUsage != 0){ der->keyUsageSz = SetKeyUsage(der->keyUsage, sizeof(der->keyUsage), cert->keyUsage); if (der->keyUsageSz == 0) return KEYUSAGE_E; der->extensionsSz += der->keyUsageSz; } else der->keyUsageSz = 0; /* Certificate Policies */ if (cert->certPoliciesNb != 0) { der->certPoliciesSz = SetCertificatePolicies(der->certPolicies, sizeof(der->certPolicies), cert->certPolicies, cert->certPoliciesNb); if (der->certPoliciesSz == 0) return CERTPOLICIES_E; der->extensionsSz += der->certPoliciesSz; } else der->certPoliciesSz = 0; #endif /* WOLFSSL_CERT_EXT */ /* put extensions */ if (der->extensionsSz > 0) { /* put the start of extensions sequence (ID, Size) */ der->extensionsSz = SetExtensionsHeader(der->extensions, sizeof(der->extensions), der->extensionsSz); if (der->extensionsSz == 0) return EXTENSIONS_E; /* put CA */ if (der->caSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->ca, der->caSz); if (ret == 0) return EXTENSIONS_E; } #ifdef WOLFSSL_ALT_NAMES /* put Alternative Names */ if (der->altNamesSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->altNames, der->altNamesSz); if (ret == 0) return EXTENSIONS_E; } #endif #ifdef WOLFSSL_CERT_EXT /* put SKID */ if (der->skidSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->skid, der->skidSz); if (ret == 0) return EXTENSIONS_E; } /* put AKID */ if (der->akidSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->akid, der->akidSz); if (ret == 0) return EXTENSIONS_E; } /* put KeyUsage */ if (der->keyUsageSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->keyUsage, der->keyUsageSz); if (ret == 0) return EXTENSIONS_E; } /* put Certificate Policies */ if (der->certPoliciesSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->certPolicies, der->certPoliciesSz); if (ret == 0) return EXTENSIONS_E; } #endif /* WOLFSSL_CERT_EXT */ } der->total = der->versionSz + der->serialSz + der->sigAlgoSz + der->publicKeySz + der->validitySz + der->subjectSz + der->issuerSz + der->extensionsSz; return 0; } /* write DER encoded cert to buffer, size already checked */ static int WriteCertBody(DerCert* der, byte* buffer) { int idx; /* signed part header */ idx = SetSequence(der->total, buffer); /* version */ XMEMCPY(buffer + idx, der->version, der->versionSz); idx += der->versionSz; /* serial */ XMEMCPY(buffer + idx, der->serial, der->serialSz); idx += der->serialSz; /* sig algo */ XMEMCPY(buffer + idx, der->sigAlgo, der->sigAlgoSz); idx += der->sigAlgoSz; /* issuer */ XMEMCPY(buffer + idx, der->issuer, der->issuerSz); idx += der->issuerSz; /* validity */ XMEMCPY(buffer + idx, der->validity, der->validitySz); idx += der->validitySz; /* subject */ XMEMCPY(buffer + idx, der->subject, der->subjectSz); idx += der->subjectSz; /* public key */ XMEMCPY(buffer + idx, der->publicKey, der->publicKeySz); idx += der->publicKeySz; if (der->extensionsSz) { /* extensions */ XMEMCPY(buffer + idx, der->extensions, min(der->extensionsSz, sizeof(der->extensions))); idx += der->extensionsSz; } return idx; } /* Make RSA signature from buffer (sz), write to sig (sigSz) */ static int MakeSignature(const byte* buffer, int sz, byte* sig, int sigSz, RsaKey* rsaKey, ecc_key* eccKey, WC_RNG* rng, int sigAlgoType) { int encSigSz, digestSz, typeH = 0, ret = 0; byte digest[MAX_DIGEST_SIZE]; /* max size */ #ifdef WOLFSSL_SMALL_STACK byte* encSig; #else byte encSig[MAX_ENCODED_DIG_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ]; #endif (void)digest; (void)digestSz; (void)encSig; (void)encSigSz; (void)typeH; (void)buffer; (void)sz; (void)sig; (void)sigSz; (void)rsaKey; (void)eccKey; (void)rng; switch (sigAlgoType) { #ifndef NO_MD5 case CTC_MD5wRSA: if ((ret = wc_Md5Hash(buffer, sz, digest)) == 0) { typeH = MD5h; digestSz = MD5_DIGEST_SIZE; } break; #endif #ifndef NO_SHA case CTC_SHAwRSA: case CTC_SHAwECDSA: if ((ret = wc_ShaHash(buffer, sz, digest)) == 0) { typeH = SHAh; digestSz = SHA_DIGEST_SIZE; } break; #endif #ifndef NO_SHA256 case CTC_SHA256wRSA: case CTC_SHA256wECDSA: if ((ret = wc_Sha256Hash(buffer, sz, digest)) == 0) { typeH = SHA256h; digestSz = SHA256_DIGEST_SIZE; } break; #endif #ifdef WOLFSSL_SHA512 case CTC_SHA512wRSA: case CTC_SHA512wECDSA: if ((ret = wc_Sha512Hash(buffer, sz, digest)) == 0) { typeH = SHA256h; digestSz = SHA256_DIGEST_SIZE; } break; #endif default: WOLFSSL_MSG("MakeSignautre called with unsupported type"); ret = ALGO_ID_E; } if (ret != 0) return ret; #ifdef WOLFSSL_SMALL_STACK encSig = (byte*)XMALLOC(MAX_ENCODED_DIG_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (encSig == NULL) return MEMORY_E; #endif ret = ALGO_ID_E; #ifndef NO_RSA if (rsaKey) { /* signature */ encSigSz = wc_EncodeSignature(encSig, digest, digestSz, typeH); ret = wc_RsaSSL_Sign(encSig, encSigSz, sig, sigSz, rsaKey, rng); } #endif #ifdef HAVE_ECC if (!rsaKey && eccKey) { word32 outSz = sigSz; ret = wc_ecc_sign_hash(digest, digestSz, sig, &outSz, rng, eccKey); if (ret == 0) ret = outSz; } #endif #ifdef WOLFSSL_SMALL_STACK XFREE(encSig, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } /* add signature to end of buffer, size of buffer assumed checked, return new length */ static int AddSignature(byte* buffer, int bodySz, const byte* sig, int sigSz, int sigAlgoType) { byte seq[MAX_SEQ_SZ]; int idx = bodySz, seqSz; /* algo */ idx += SetAlgoID(sigAlgoType, buffer + idx, sigType, 0); /* bit string */ buffer[idx++] = ASN_BIT_STRING; /* length */ idx += SetLength(sigSz + 1, buffer + idx); buffer[idx++] = 0; /* trailing 0 */ /* signature */ XMEMCPY(buffer + idx, sig, sigSz); idx += sigSz; /* make room for overall header */ seqSz = SetSequence(idx, seq); XMEMMOVE(buffer + seqSz, buffer, idx); XMEMCPY(buffer, seq, seqSz); return idx + seqSz; } /* Make an x509 Certificate v3 any key type from cert input, write to buffer */ static int MakeAnyCert(Cert* cert, byte* derBuffer, word32 derSz, RsaKey* rsaKey, ecc_key* eccKey, WC_RNG* rng, const byte* ntruKey, word16 ntruSz) { int ret; #ifdef WOLFSSL_SMALL_STACK DerCert* der; #else DerCert der[1]; #endif cert->keyType = eccKey ? ECC_KEY : (rsaKey ? RSA_KEY : NTRU_KEY); #ifdef WOLFSSL_SMALL_STACK der = (DerCert*)XMALLOC(sizeof(DerCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (der == NULL) return MEMORY_E; #endif ret = EncodeCert(cert, der, rsaKey, eccKey, rng, ntruKey, ntruSz); if (ret == 0) { if (der->total + MAX_SEQ_SZ * 2 > (int)derSz) ret = BUFFER_E; else ret = cert->bodySz = WriteCertBody(der, derBuffer); } #ifdef WOLFSSL_SMALL_STACK XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } /* Make an x509 Certificate v3 RSA or ECC from cert input, write to buffer */ int wc_MakeCert(Cert* cert, byte* derBuffer, word32 derSz, RsaKey* rsaKey, ecc_key* eccKey, WC_RNG* rng) { return MakeAnyCert(cert, derBuffer, derSz, rsaKey, eccKey, rng, NULL, 0); } #ifdef HAVE_NTRU int wc_MakeNtruCert(Cert* cert, byte* derBuffer, word32 derSz, const byte* ntruKey, word16 keySz, WC_RNG* rng) { return MakeAnyCert(cert, derBuffer, derSz, NULL, NULL, rng, ntruKey, keySz); } #endif /* HAVE_NTRU */ #ifdef WOLFSSL_CERT_REQ static int SetReqAttrib(byte* output, char* pw, int extSz) { static const byte cpOid[] = { ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x09, 0x07 }; static const byte erOid[] = { ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x09, 0x0e }; int sz = 0; /* overall size */ int cpSz = 0; /* Challenge Password section size */ int cpSeqSz = 0; int cpSetSz = 0; int cpStrSz = 0; int pwSz = 0; int erSz = 0; /* Extension Request section size */ int erSeqSz = 0; int erSetSz = 0; byte cpSeq[MAX_SEQ_SZ]; byte cpSet[MAX_SET_SZ]; byte cpStr[MAX_PRSTR_SZ]; byte erSeq[MAX_SEQ_SZ]; byte erSet[MAX_SET_SZ]; output[0] = 0xa0; sz++; if (pw && pw[0]) { pwSz = (int)XSTRLEN(pw); cpStrSz = SetUTF8String(pwSz, cpStr); cpSetSz = SetSet(cpStrSz + pwSz, cpSet); cpSeqSz = SetSequence(sizeof(cpOid) + cpSetSz + cpStrSz + pwSz, cpSeq); cpSz = cpSeqSz + sizeof(cpOid) + cpSetSz + cpStrSz + pwSz; } if (extSz) { erSetSz = SetSet(extSz, erSet); erSeqSz = SetSequence(erSetSz + sizeof(erOid) + extSz, erSeq); erSz = extSz + erSetSz + erSeqSz + sizeof(erOid); } /* Put the pieces together. */ sz += SetLength(cpSz + erSz, &output[sz]); if (cpSz) { XMEMCPY(&output[sz], cpSeq, cpSeqSz); sz += cpSeqSz; XMEMCPY(&output[sz], cpOid, sizeof(cpOid)); sz += sizeof(cpOid); XMEMCPY(&output[sz], cpSet, cpSetSz); sz += cpSetSz; XMEMCPY(&output[sz], cpStr, cpStrSz); sz += cpStrSz; XMEMCPY(&output[sz], pw, pwSz); sz += pwSz; } if (erSz) { XMEMCPY(&output[sz], erSeq, erSeqSz); sz += erSeqSz; XMEMCPY(&output[sz], erOid, sizeof(erOid)); sz += sizeof(erOid); XMEMCPY(&output[sz], erSet, erSetSz); sz += erSetSz; /* The actual extension data will be tacked onto the output later. */ } return sz; } /* encode info from cert into DER encoded format */ static int EncodeCertReq(Cert* cert, DerCert* der, RsaKey* rsaKey, ecc_key* eccKey) { (void)eccKey; if (cert == NULL || der == NULL) return BAD_FUNC_ARG; /* init */ XMEMSET(der, 0, sizeof(DerCert)); /* version */ der->versionSz = SetMyVersion(cert->version, der->version, FALSE); /* subject name */ der->subjectSz = SetName(der->subject, sizeof(der->subject), &cert->subject); if (der->subjectSz == 0) return SUBJECT_E; /* public key */ if (cert->keyType == RSA_KEY) { if (rsaKey == NULL) return PUBLIC_KEY_E; der->publicKeySz = SetRsaPublicKey(der->publicKey, rsaKey, sizeof(der->publicKey), 1); if (der->publicKeySz <= 0) return PUBLIC_KEY_E; } #ifdef HAVE_ECC if (cert->keyType == ECC_KEY) { if (eccKey == NULL) return PUBLIC_KEY_E; der->publicKeySz = SetEccPublicKey(der->publicKey, eccKey, 1); if (der->publicKeySz <= 0) return PUBLIC_KEY_E; } #endif /* HAVE_ECC */ /* set the extensions */ der->extensionsSz = 0; /* CA */ if (cert->isCA) { der->caSz = SetCa(der->ca, sizeof(der->ca)); if (der->caSz == 0) return CA_TRUE_E; der->extensionsSz += der->caSz; } else der->caSz = 0; #ifdef WOLFSSL_CERT_EXT /* SKID */ if (cert->skidSz) { /* check the provided SKID size */ if (cert->skidSz > (int)sizeof(der->skid)) return SKID_E; der->skidSz = SetSKID(der->skid, sizeof(der->skid), cert->skid, cert->skidSz); if (der->skidSz == 0) return SKID_E; der->extensionsSz += der->skidSz; } else der->skidSz = 0; /* Key Usage */ if (cert->keyUsage != 0){ der->keyUsageSz = SetKeyUsage(der->keyUsage, sizeof(der->keyUsage), cert->keyUsage); if (der->keyUsageSz == 0) return KEYUSAGE_E; der->extensionsSz += der->keyUsageSz; } else der->keyUsageSz = 0; #endif /* WOLFSSL_CERT_EXT */ /* put extensions */ if (der->extensionsSz > 0) { int ret; /* put the start of sequence (ID, Size) */ der->extensionsSz = SetSequence(der->extensionsSz, der->extensions); if (der->extensionsSz == 0) return EXTENSIONS_E; /* put CA */ if (der->caSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->ca, der->caSz); if (ret == 0) return EXTENSIONS_E; } #ifdef WOLFSSL_CERT_EXT /* put SKID */ if (der->skidSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->skid, der->skidSz); if (ret == 0) return EXTENSIONS_E; } /* put AKID */ if (der->akidSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->akid, der->akidSz); if (ret == 0) return EXTENSIONS_E; } /* put KeyUsage */ if (der->keyUsageSz) { ret = SetExtensions(der->extensions, sizeof(der->extensions), &der->extensionsSz, der->keyUsage, der->keyUsageSz); if (ret == 0) return EXTENSIONS_E; } #endif /* WOLFSSL_CERT_EXT */ } der->attribSz = SetReqAttrib(der->attrib, cert->challengePw, der->extensionsSz); if (der->attribSz == 0) return REQ_ATTRIBUTE_E; der->total = der->versionSz + der->subjectSz + der->publicKeySz + der->extensionsSz + der->attribSz; return 0; } /* write DER encoded cert req to buffer, size already checked */ static int WriteCertReqBody(DerCert* der, byte* buffer) { int idx; /* signed part header */ idx = SetSequence(der->total, buffer); /* version */ XMEMCPY(buffer + idx, der->version, der->versionSz); idx += der->versionSz; /* subject */ XMEMCPY(buffer + idx, der->subject, der->subjectSz); idx += der->subjectSz; /* public key */ XMEMCPY(buffer + idx, der->publicKey, der->publicKeySz); idx += der->publicKeySz; /* attributes */ XMEMCPY(buffer + idx, der->attrib, der->attribSz); idx += der->attribSz; /* extensions */ if (der->extensionsSz) { XMEMCPY(buffer + idx, der->extensions, min(der->extensionsSz, sizeof(der->extensions))); idx += der->extensionsSz; } return idx; } int wc_MakeCertReq(Cert* cert, byte* derBuffer, word32 derSz, RsaKey* rsaKey, ecc_key* eccKey) { int ret; #ifdef WOLFSSL_SMALL_STACK DerCert* der; #else DerCert der[1]; #endif cert->keyType = eccKey ? ECC_KEY : RSA_KEY; #ifdef WOLFSSL_SMALL_STACK der = (DerCert*)XMALLOC(sizeof(DerCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (der == NULL) return MEMORY_E; #endif ret = EncodeCertReq(cert, der, rsaKey, eccKey); if (ret == 0) { if (der->total + MAX_SEQ_SZ * 2 > (int)derSz) ret = BUFFER_E; else ret = cert->bodySz = WriteCertReqBody(der, derBuffer); } #ifdef WOLFSSL_SMALL_STACK XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } #endif /* WOLFSSL_CERT_REQ */ int wc_SignCert(int requestSz, int sType, byte* buffer, word32 buffSz, RsaKey* rsaKey, ecc_key* eccKey, WC_RNG* rng) { int sigSz; #ifdef WOLFSSL_SMALL_STACK byte* sig; #else byte sig[MAX_ENCODED_SIG_SZ]; #endif if (requestSz < 0) return requestSz; #ifdef WOLFSSL_SMALL_STACK sig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (sig == NULL) return MEMORY_E; #endif sigSz = MakeSignature(buffer, requestSz, sig, MAX_ENCODED_SIG_SZ, rsaKey, eccKey, rng, sType); if (sigSz >= 0) { if (requestSz + MAX_SEQ_SZ * 2 + sigSz > (int)buffSz) sigSz = BUFFER_E; else sigSz = AddSignature(buffer, requestSz, sig, sigSz, sType); } #ifdef WOLFSSL_SMALL_STACK XFREE(sig, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return sigSz; } int wc_MakeSelfCert(Cert* cert, byte* buffer, word32 buffSz, RsaKey* key, WC_RNG* rng) { int ret; ret = wc_MakeCert(cert, buffer, buffSz, key, NULL, rng); if (ret < 0) return ret; return wc_SignCert(cert->bodySz, cert->sigType, buffer, buffSz, key, NULL, rng); } #ifdef WOLFSSL_CERT_EXT /* Set KID from RSA or ECC public key */ static int SetKeyIdFromPublicKey(Cert *cert, RsaKey *rsakey, ecc_key *eckey, byte *ntruKey, word16 ntruKeySz, int kid_type) { byte *buffer; int bufferSz, ret; #ifndef HAVE_NTRU (void)ntruKeySz; #endif if (cert == NULL || (rsakey == NULL && eckey == NULL && ntruKey == NULL) || (rsakey != NULL && eckey != NULL) || (rsakey != NULL && ntruKey != NULL) || (ntruKey != NULL && eckey != NULL) || (kid_type != SKID_TYPE && kid_type != AKID_TYPE)) return BAD_FUNC_ARG; buffer = (byte *)XMALLOC(MAX_PUBLIC_KEY_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (buffer == NULL) return MEMORY_E; /* RSA public key */ if (rsakey != NULL) bufferSz = SetRsaPublicKey(buffer, rsakey, MAX_PUBLIC_KEY_SZ, 0); #ifdef HAVE_ECC /* ECC public key */ else if (eckey != NULL) bufferSz = SetEccPublicKey(buffer, eckey, 0); #endif /* HAVE_ECC */ #ifdef HAVE_NTRU /* NTRU public key */ else if (ntruKey != NULL) { bufferSz = MAX_PUBLIC_KEY_SZ; ret = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo( ntruKeySz, ntruKey, (word16 *)(&bufferSz), buffer); if (ret != NTRU_OK) bufferSz = -1; } #endif else bufferSz = -1; if (bufferSz <= 0) { XFREE(buffer, NULL, DYNAMIC_TYPE_TMP_BUFFER); return PUBLIC_KEY_E; } /* Compute SKID by hashing public key */ #ifdef NO_SHA if (kid_type == SKID_TYPE) { ret = wc_Sha256Hash(buffer, bufferSz, cert->skid); cert->skidSz = SHA256_DIGEST_SIZE; } else if (kid_type == AKID_TYPE) { ret = wc_Sha256Hash(buffer, bufferSz, cert->akid); cert->akidSz = SHA256_DIGEST_SIZE; } else ret = BAD_FUNC_ARG; #else /* NO_SHA */ if (kid_type == SKID_TYPE) { ret = wc_ShaHash(buffer, bufferSz, cert->skid); cert->skidSz = SHA_DIGEST_SIZE; } else if (kid_type == AKID_TYPE) { ret = wc_ShaHash(buffer, bufferSz, cert->akid); cert->akidSz = SHA_DIGEST_SIZE; } else ret = BAD_FUNC_ARG; #endif /* NO_SHA */ XFREE(buffer, NULL, DYNAMIC_TYPE_TMP_BUFFER); return ret; } /* Set SKID from RSA or ECC public key */ int wc_SetSubjectKeyIdFromPublicKey(Cert *cert, RsaKey *rsakey, ecc_key *eckey) { return SetKeyIdFromPublicKey(cert, rsakey, eckey, NULL, 0, SKID_TYPE); } #ifdef HAVE_NTRU /* Set SKID from NTRU public key */ int wc_SetSubjectKeyIdFromNtruPublicKey(Cert *cert, byte *ntruKey, word16 ntruKeySz) { return SetKeyIdFromPublicKey(cert, NULL,NULL,ntruKey, ntruKeySz, SKID_TYPE); } #endif /* Set SKID from RSA or ECC public key */ int wc_SetAuthKeyIdFromPublicKey(Cert *cert, RsaKey *rsakey, ecc_key *eckey) { return SetKeyIdFromPublicKey(cert, rsakey, eckey, NULL, 0, AKID_TYPE); } #ifndef NO_FILESYSTEM /* Set SKID from public key file in PEM */ int wc_SetSubjectKeyId(Cert *cert, const char* file) { int ret, derSz; byte* der; word32 idx; RsaKey *rsakey = NULL; ecc_key *eckey = NULL; if (cert == NULL || file == NULL) return BAD_FUNC_ARG; der = (byte*)XMALLOC(MAX_PUBLIC_KEY_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (der == NULL) { WOLFSSL_MSG("wc_SetSubjectKeyId memory Problem"); return MEMORY_E; } derSz = wolfSSL_PemPubKeyToDer(file, der, MAX_PUBLIC_KEY_SZ); if (derSz <= 0) { XFREE(der, NULL, DYNAMIC_TYPE_CERT); return derSz; } /* Load PubKey in internal structure */ rsakey = (RsaKey*) XMALLOC(sizeof(RsaKey), NULL, DYNAMIC_TYPE_RSA); if (rsakey == NULL) { XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } if (wc_InitRsaKey(rsakey, NULL) != 0) { WOLFSSL_MSG("wc_InitRsaKey failure"); XFREE(rsakey, NULL, DYNAMIC_TYPE_RSA); XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } idx = 0; ret = wc_RsaPublicKeyDecode(der, &idx, rsakey, derSz); if (ret != 0) { WOLFSSL_MSG("wc_RsaPublicKeyDecode failed"); wc_FreeRsaKey(rsakey); XFREE(rsakey, NULL, DYNAMIC_TYPE_RSA); rsakey = NULL; #ifdef HAVE_ECC /* Check to load ecc public key */ eckey = (ecc_key*) XMALLOC(sizeof(ecc_key), NULL, DYNAMIC_TYPE_ECC); if (eckey == NULL) { XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } if (wc_ecc_init(eckey) != 0) { WOLFSSL_MSG("wc_ecc_init failure"); wc_ecc_free(eckey); XFREE(eckey, NULL, DYNAMIC_TYPE_ECC); XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } idx = 0; ret = wc_EccPublicKeyDecode(der, &idx, eckey, derSz); if (ret != 0) { WOLFSSL_MSG("wc_EccPublicKeyDecode failed"); XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); wc_ecc_free(eckey); return PUBLIC_KEY_E; } #else XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); return PUBLIC_KEY_E; #endif /* HAVE_ECC */ } XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER); ret = wc_SetSubjectKeyIdFromPublicKey(cert, rsakey, eckey); wc_FreeRsaKey(rsakey); XFREE(rsakey, NULL, DYNAMIC_TYPE_RSA); #ifdef HAVE_ECC wc_ecc_free(eckey); XFREE(eckey, NULL, DYNAMIC_TYPE_ECC); #endif return ret; } #endif /* NO_FILESYSTEM */ /* Set AKID from certificate contains in buffer (DER encoded) */ int wc_SetAuthKeyIdFromCert(Cert *cert, const byte *der, int derSz) { int ret; #ifdef WOLFSSL_SMALL_STACK DecodedCert* decoded; #else DecodedCert decoded[1]; #endif if (cert == NULL || der == NULL || derSz <= 0) return BAD_FUNC_ARG; #ifdef WOLFSSL_SMALL_STACK decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (decoded == NULL) return MEMORY_E; #endif /* decode certificate and get SKID that will be AKID of current cert */ InitDecodedCert(decoded, (byte*)der, derSz, 0); ret = ParseCert(decoded, CERT_TYPE, NO_VERIFY, 0); if (ret != 0) { FreeDecodedCert(decoded); return ret; } /* Subject Key Id not found !! */ if (decoded->extSubjKeyIdSet == 0) { FreeDecodedCert(decoded); return ASN_NO_SKID; } /* SKID invalid size */ if (sizeof(cert->akid) < sizeof(decoded->extSubjKeyId)) { FreeDecodedCert(decoded); return MEMORY_E; } /* Put the SKID of CA to AKID of certificate */ XMEMCPY(cert->akid, decoded->extSubjKeyId, KEYID_SIZE); cert->akidSz = KEYID_SIZE; FreeDecodedCert(decoded); return 0; } #ifndef NO_FILESYSTEM /* Set AKID from certificate file in PEM */ int wc_SetAuthKeyId(Cert *cert, const char* file) { int ret; int derSz; byte* der; if (cert == NULL || file == NULL) return BAD_FUNC_ARG; der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT); if (der == NULL) { WOLFSSL_MSG("wc_SetAuthKeyId OOF Problem"); return MEMORY_E; } derSz = wolfSSL_PemCertToDer(file, der, EIGHTK_BUF); if (derSz <= 0) { XFREE(der, NULL, DYNAMIC_TYPE_CERT); return derSz; } ret = wc_SetAuthKeyIdFromCert(cert, der, derSz); XFREE(der, NULL, DYNAMIC_TYPE_CERT); return ret; } #endif /* NO_FILESYSTEM */ /* Set KeyUsage from human readale string */ int wc_SetKeyUsage(Cert *cert, const char *value) { char *token, *str, *ptr; word32 len; if (cert == NULL || value == NULL) return BAD_FUNC_ARG; cert->keyUsage = 0; str = (char *)XMALLOC(XSTRLEN(value)+1, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (str == NULL) return MEMORY_E; XMEMSET(str, 0, XSTRLEN(value)+1); XSTRNCPY(str, value, XSTRLEN(value)); /* parse value, and set corresponding Key Usage value */ token = XSTRTOK(str, ",", &ptr); while (token != NULL) { len = (word32)XSTRLEN(token); if (!XSTRNCASECMP(token, "digitalSignature", len)) cert->keyUsage |= KEYUSE_DIGITAL_SIG; else if (!XSTRNCASECMP(token, "nonRepudiation", len) || !XSTRNCASECMP(token, "contentCommitment", len)) cert->keyUsage |= KEYUSE_CONTENT_COMMIT; else if (!XSTRNCASECMP(token, "keyEncipherment", len)) cert->keyUsage |= KEYUSE_KEY_ENCIPHER; else if (!XSTRNCASECMP(token, "dataEncipherment", len)) cert->keyUsage |= KEYUSE_DATA_ENCIPHER; else if (!XSTRNCASECMP(token, "keyAgreement", len)) cert->keyUsage |= KEYUSE_KEY_AGREE; else if (!XSTRNCASECMP(token, "keyCertSign", len)) cert->keyUsage |= KEYUSE_KEY_CERT_SIGN; else if (!XSTRNCASECMP(token, "cRLSign", len)) cert->keyUsage |= KEYUSE_CRL_SIGN; else if (!XSTRNCASECMP(token, "encipherOnly", len)) cert->keyUsage |= KEYUSE_ENCIPHER_ONLY; else if (!XSTRNCASECMP(token, "decipherOnly", len)) cert->keyUsage |= KEYUSE_DECIPHER_ONLY; else return KEYUSAGE_E; token = XSTRTOK(NULL, ",", &ptr); } XFREE(str, NULL, DYNAMIC_TYPE_TMP_BUFFER); return 0; } #endif /* WOLFSSL_CERT_EXT */ #ifdef WOLFSSL_ALT_NAMES /* Set Alt Names from der cert, return 0 on success */ static int SetAltNamesFromCert(Cert* cert, const byte* der, int derSz) { int ret; #ifdef WOLFSSL_SMALL_STACK DecodedCert* decoded; #else DecodedCert decoded[1]; #endif if (derSz < 0) return derSz; #ifdef WOLFSSL_SMALL_STACK decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (decoded == NULL) return MEMORY_E; #endif InitDecodedCert(decoded, (byte*)der, derSz, 0); ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0); if (ret < 0) { WOLFSSL_MSG("ParseCertRelative error"); } else if (decoded->extensions) { byte b; int length; word32 maxExtensionsIdx; decoded->srcIdx = decoded->extensionsIdx; b = decoded->source[decoded->srcIdx++]; if (b != ASN_EXTENSIONS) { ret = ASN_PARSE_E; } else if (GetLength(decoded->source, &decoded->srcIdx, &length, decoded->maxIdx) < 0) { ret = ASN_PARSE_E; } else if (GetSequence(decoded->source, &decoded->srcIdx, &length, decoded->maxIdx) < 0) { ret = ASN_PARSE_E; } else { maxExtensionsIdx = decoded->srcIdx + length; while (decoded->srcIdx < maxExtensionsIdx) { word32 oid; word32 startIdx = decoded->srcIdx; word32 tmpIdx; if (GetSequence(decoded->source, &decoded->srcIdx, &length, decoded->maxIdx) < 0) { ret = ASN_PARSE_E; break; } tmpIdx = decoded->srcIdx; decoded->srcIdx = startIdx; if (GetAlgoId(decoded->source, &decoded->srcIdx, &oid, decoded->maxIdx) < 0) { ret = ASN_PARSE_E; break; } if (oid == ALT_NAMES_OID) { cert->altNamesSz = length + (tmpIdx - startIdx); if (cert->altNamesSz < (int)sizeof(cert->altNames)) XMEMCPY(cert->altNames, &decoded->source[startIdx], cert->altNamesSz); else { cert->altNamesSz = 0; WOLFSSL_MSG("AltNames extensions too big"); ret = ALT_NAME_E; break; } } decoded->srcIdx = tmpIdx + length; } } } FreeDecodedCert(decoded); #ifdef WOLFSSL_SMALL_STACK XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret < 0 ? ret : 0; } /* Set Dates from der cert, return 0 on success */ static int SetDatesFromCert(Cert* cert, const byte* der, int derSz) { int ret; #ifdef WOLFSSL_SMALL_STACK DecodedCert* decoded; #else DecodedCert decoded[1]; #endif WOLFSSL_ENTER("SetDatesFromCert"); if (derSz < 0) return derSz; #ifdef WOLFSSL_SMALL_STACK decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (decoded == NULL) return MEMORY_E; #endif InitDecodedCert(decoded, (byte*)der, derSz, 0); ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0); if (ret < 0) { WOLFSSL_MSG("ParseCertRelative error"); } else if (decoded->beforeDate == NULL || decoded->afterDate == NULL) { WOLFSSL_MSG("Couldn't extract dates"); ret = -1; } else if (decoded->beforeDateLen > MAX_DATE_SIZE || decoded->afterDateLen > MAX_DATE_SIZE) { WOLFSSL_MSG("Bad date size"); ret = -1; } else { XMEMCPY(cert->beforeDate, decoded->beforeDate, decoded->beforeDateLen); XMEMCPY(cert->afterDate, decoded->afterDate, decoded->afterDateLen); cert->beforeDateSz = decoded->beforeDateLen; cert->afterDateSz = decoded->afterDateLen; } FreeDecodedCert(decoded); #ifdef WOLFSSL_SMALL_STACK XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret < 0 ? ret : 0; } #endif /* WOLFSSL_ALT_NAMES && !NO_RSA */ /* Set cn name from der buffer, return 0 on success */ static int SetNameFromCert(CertName* cn, const byte* der, int derSz) { int ret, sz; #ifdef WOLFSSL_SMALL_STACK DecodedCert* decoded; #else DecodedCert decoded[1]; #endif if (derSz < 0) return derSz; #ifdef WOLFSSL_SMALL_STACK decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (decoded == NULL) return MEMORY_E; #endif InitDecodedCert(decoded, (byte*)der, derSz, 0); ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0); if (ret < 0) { WOLFSSL_MSG("ParseCertRelative error"); } else { if (decoded->subjectCN) { sz = (decoded->subjectCNLen < CTC_NAME_SIZE) ? decoded->subjectCNLen : CTC_NAME_SIZE - 1; strncpy(cn->commonName, decoded->subjectCN, CTC_NAME_SIZE); cn->commonName[sz] = 0; cn->commonNameEnc = decoded->subjectCNEnc; } if (decoded->subjectC) { sz = (decoded->subjectCLen < CTC_NAME_SIZE) ? decoded->subjectCLen : CTC_NAME_SIZE - 1; strncpy(cn->country, decoded->subjectC, CTC_NAME_SIZE); cn->country[sz] = 0; cn->countryEnc = decoded->subjectCEnc; } if (decoded->subjectST) { sz = (decoded->subjectSTLen < CTC_NAME_SIZE) ? decoded->subjectSTLen : CTC_NAME_SIZE - 1; strncpy(cn->state, decoded->subjectST, CTC_NAME_SIZE); cn->state[sz] = 0; cn->stateEnc = decoded->subjectSTEnc; } if (decoded->subjectL) { sz = (decoded->subjectLLen < CTC_NAME_SIZE) ? decoded->subjectLLen : CTC_NAME_SIZE - 1; strncpy(cn->locality, decoded->subjectL, CTC_NAME_SIZE); cn->locality[sz] = 0; cn->localityEnc = decoded->subjectLEnc; } if (decoded->subjectO) { sz = (decoded->subjectOLen < CTC_NAME_SIZE) ? decoded->subjectOLen : CTC_NAME_SIZE - 1; strncpy(cn->org, decoded->subjectO, CTC_NAME_SIZE); cn->org[sz] = 0; cn->orgEnc = decoded->subjectOEnc; } if (decoded->subjectOU) { sz = (decoded->subjectOULen < CTC_NAME_SIZE) ? decoded->subjectOULen : CTC_NAME_SIZE - 1; strncpy(cn->unit, decoded->subjectOU, CTC_NAME_SIZE); cn->unit[sz] = 0; cn->unitEnc = decoded->subjectOUEnc; } if (decoded->subjectSN) { sz = (decoded->subjectSNLen < CTC_NAME_SIZE) ? decoded->subjectSNLen : CTC_NAME_SIZE - 1; strncpy(cn->sur, decoded->subjectSN, CTC_NAME_SIZE); cn->sur[sz] = 0; cn->surEnc = decoded->subjectSNEnc; } if (decoded->subjectEmail) { sz = (decoded->subjectEmailLen < CTC_NAME_SIZE) ? decoded->subjectEmailLen : CTC_NAME_SIZE - 1; strncpy(cn->email, decoded->subjectEmail, CTC_NAME_SIZE); cn->email[sz] = 0; } } FreeDecodedCert(decoded); #ifdef WOLFSSL_SMALL_STACK XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret < 0 ? ret : 0; } #ifndef NO_FILESYSTEM /* Set cert issuer from issuerFile in PEM */ int wc_SetIssuer(Cert* cert, const char* issuerFile) { int ret; int derSz; byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT); if (der == NULL) { WOLFSSL_MSG("wc_SetIssuer OOF Problem"); return MEMORY_E; } derSz = wolfSSL_PemCertToDer(issuerFile, der, EIGHTK_BUF); cert->selfSigned = 0; ret = SetNameFromCert(&cert->issuer, der, derSz); XFREE(der, NULL, DYNAMIC_TYPE_CERT); return ret; } /* Set cert subject from subjectFile in PEM */ int wc_SetSubject(Cert* cert, const char* subjectFile) { int ret; int derSz; byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT); if (der == NULL) { WOLFSSL_MSG("wc_SetSubject OOF Problem"); return MEMORY_E; } derSz = wolfSSL_PemCertToDer(subjectFile, der, EIGHTK_BUF); ret = SetNameFromCert(&cert->subject, der, derSz); XFREE(der, NULL, DYNAMIC_TYPE_CERT); return ret; } #ifdef WOLFSSL_ALT_NAMES /* Set atl names from file in PEM */ int wc_SetAltNames(Cert* cert, const char* file) { int ret; int derSz; byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT); if (der == NULL) { WOLFSSL_MSG("wc_SetAltNames OOF Problem"); return MEMORY_E; } derSz = wolfSSL_PemCertToDer(file, der, EIGHTK_BUF); ret = SetAltNamesFromCert(cert, der, derSz); XFREE(der, NULL, DYNAMIC_TYPE_CERT); return ret; } #endif /* WOLFSSL_ALT_NAMES */ #endif /* NO_FILESYSTEM */ /* Set cert issuer from DER buffer */ int wc_SetIssuerBuffer(Cert* cert, const byte* der, int derSz) { cert->selfSigned = 0; return SetNameFromCert(&cert->issuer, der, derSz); } /* Set cert subject from DER buffer */ int wc_SetSubjectBuffer(Cert* cert, const byte* der, int derSz) { return SetNameFromCert(&cert->subject, der, derSz); } #ifdef WOLFSSL_ALT_NAMES /* Set cert alt names from DER buffer */ int wc_SetAltNamesBuffer(Cert* cert, const byte* der, int derSz) { return SetAltNamesFromCert(cert, der, derSz); } /* Set cert dates from DER buffer */ int wc_SetDatesBuffer(Cert* cert, const byte* der, int derSz) { return SetDatesFromCert(cert, der, derSz); } #endif /* WOLFSSL_ALT_NAMES */ #endif /* WOLFSSL_CERT_GEN */ #ifdef HAVE_ECC /* Der Encode r & s ints into out, outLen is (in/out) size */ int StoreECC_DSA_Sig(byte* out, word32* outLen, mp_int* r, mp_int* s) { word32 idx = 0; word32 rSz; /* encoding size */ word32 sSz; word32 headerSz = 4; /* 2*ASN_TAG + 2*LEN(ENUM) */ /* If the leading bit on the INTEGER is a 1, add a leading zero */ int rLeadingZero = mp_leading_bit(r); int sLeadingZero = mp_leading_bit(s); int rLen = mp_unsigned_bin_size(r); /* big int size */ int sLen = mp_unsigned_bin_size(s); int err; if (*outLen < (rLen + rLeadingZero + sLen + sLeadingZero + headerSz + 2)) /* SEQ_TAG + LEN(ENUM) */ return BAD_FUNC_ARG; idx = SetSequence(rLen+rLeadingZero+sLen+sLeadingZero+headerSz, out); /* store r */ out[idx++] = ASN_INTEGER; rSz = SetLength(rLen + rLeadingZero, &out[idx]); idx += rSz; if (rLeadingZero) out[idx++] = 0; err = mp_to_unsigned_bin(r, &out[idx]); if (err != MP_OKAY) return err; idx += rLen; /* store s */ out[idx++] = ASN_INTEGER; sSz = SetLength(sLen + sLeadingZero, &out[idx]); idx += sSz; if (sLeadingZero) out[idx++] = 0; err = mp_to_unsigned_bin(s, &out[idx]); if (err != MP_OKAY) return err; idx += sLen; *outLen = idx; return 0; } /* Der Decode ECC-DSA Signautre, r & s stored as big ints */ int DecodeECC_DSA_Sig(const byte* sig, word32 sigLen, mp_int* r, mp_int* s) { word32 idx = 0; int len = 0; if (GetSequence(sig, &idx, &len, sigLen) < 0) return ASN_ECC_KEY_E; if ((word32)len > (sigLen - idx)) return ASN_ECC_KEY_E; if (GetInt(r, sig, &idx, sigLen) < 0) return ASN_ECC_KEY_E; if (GetInt(s, sig, &idx, sigLen) < 0) return ASN_ECC_KEY_E; return 0; } int wc_EccPrivateKeyDecode(const byte* input, word32* inOutIdx, ecc_key* key, word32 inSz) { word32 oid = 0; int version, length; int privSz, pubSz; byte b; int ret = 0; #ifdef WOLFSSL_SMALL_STACK byte* priv; byte* pub; #else byte priv[ECC_MAXSIZE+1]; byte pub[2*(ECC_MAXSIZE+1)]; /* public key has two parts plus header */ #endif if (input == NULL || inOutIdx == NULL || key == NULL || inSz == 0) return BAD_FUNC_ARG; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (GetMyVersion(input, inOutIdx, &version) < 0) return ASN_PARSE_E; b = input[*inOutIdx]; *inOutIdx += 1; /* priv type */ if (b != 4 && b != 6 && b != 7) return ASN_PARSE_E; if (GetLength(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; if (length > ECC_MAXSIZE) return BUFFER_E; #ifdef WOLFSSL_SMALL_STACK priv = (byte*)XMALLOC(ECC_MAXSIZE+1, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (priv == NULL) return MEMORY_E; pub = (byte*)XMALLOC(2*(ECC_MAXSIZE+1), NULL, DYNAMIC_TYPE_TMP_BUFFER); if (pub == NULL) { XFREE(priv, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } #endif /* priv key */ privSz = length; XMEMCPY(priv, &input[*inOutIdx], privSz); *inOutIdx += length; /* prefix 0, may have */ b = input[*inOutIdx]; if (b == ECC_PREFIX_0) { *inOutIdx += 1; if (GetLength(input, inOutIdx, &length, inSz) < 0) ret = ASN_PARSE_E; else { /* object id */ b = input[*inOutIdx]; *inOutIdx += 1; if (b != ASN_OBJECT_ID) { ret = ASN_OBJECT_ID_E; } else if (GetLength(input, inOutIdx, &length, inSz) < 0) { ret = ASN_PARSE_E; } else { while(length--) { oid += input[*inOutIdx]; *inOutIdx += 1; } if (CheckCurve(oid) < 0) ret = ECC_CURVE_OID_E; } } } if (ret == 0) { /* prefix 1 */ b = input[*inOutIdx]; *inOutIdx += 1; if (b != ECC_PREFIX_1) { ret = ASN_ECC_KEY_E; } else if (GetLength(input, inOutIdx, &length, inSz) < 0) { ret = ASN_PARSE_E; } else { /* key header */ b = input[*inOutIdx]; *inOutIdx += 1; if (b != ASN_BIT_STRING) { ret = ASN_BITSTR_E; } else if (GetLength(input, inOutIdx, &length, inSz) < 0) { ret = ASN_PARSE_E; } else if (length <= 0) { /* pubkey needs some size */ ret = ASN_INPUT_E; } else { b = input[*inOutIdx]; *inOutIdx += 1; if (b != 0x00) { ret = ASN_EXPECT_0_E; } else { /* pub key */ pubSz = length - 1; /* null prefix */ if (pubSz < 2*(ECC_MAXSIZE+1)) { XMEMCPY(pub, &input[*inOutIdx], pubSz); *inOutIdx += length; ret = wc_ecc_import_private_key(priv, privSz, pub, pubSz, key); } else ret = BUFFER_E; } } } } #ifdef WOLFSSL_SMALL_STACK XFREE(priv, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); #endif return ret; } int wc_EccPublicKeyDecode(const byte* input, word32* inOutIdx, ecc_key* key, word32 inSz) { int length; int ret = 0; if (input == NULL || inOutIdx == NULL || key == NULL || inSz == 0) return BAD_FUNC_ARG; if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; #if defined(OPENSSL_EXTRA) || defined(ECC_DECODE_EXTRA) { byte b = input[*inOutIdx]; if (b != ASN_INTEGER) { /* not from decoded cert, will have algo id, skip past */ if (GetSequence(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; b = input[(*inOutIdx)++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; *inOutIdx += length; /* skip past */ /* ecc params information */ b = input[(*inOutIdx)++]; if (b != ASN_OBJECT_ID) return ASN_OBJECT_ID_E; if (GetLength(input, inOutIdx, &length, inSz) < 0) return ASN_PARSE_E; *inOutIdx += length; /* skip past */ /* key header */ b = input[*inOutIdx]; *inOutIdx += 1; if (b != ASN_BIT_STRING) ret = ASN_BITSTR_E; else if (GetLength(input, inOutIdx, &length, inSz) < 0) ret = ASN_PARSE_E; else { b = input[*inOutIdx]; *inOutIdx += 1; if (b != 0x00) ret = ASN_EXPECT_0_E; } } } /* openssl var block */ #endif /* OPENSSL_EXTRA */ if (wc_ecc_import_x963(input+*inOutIdx, inSz - *inOutIdx, key) != 0) return ASN_ECC_KEY_E; return ret; } #ifdef WOLFSSL_KEY_GEN /* Write a Private ecc key to DER format, length on success else < 0 */ int wc_EccKeyToDer(ecc_key* key, byte* output, word32 inLen) { byte curve[MAX_ALGO_SZ+2]; byte ver[MAX_VERSION_SZ]; byte seq[MAX_SEQ_SZ]; byte *prv, *pub; int ret, totalSz, curveSz, verSz; int privHdrSz = ASN_ECC_HEADER_SZ; int pubHdrSz = ASN_ECC_CONTEXT_SZ + ASN_ECC_HEADER_SZ; word32 idx = 0, prvidx = 0, pubidx = 0, curveidx = 0; word32 seqSz, privSz, pubSz = ECC_BUFSIZE; if (key == NULL || output == NULL || inLen == 0) return BAD_FUNC_ARG; /* curve */ curve[curveidx++] = ECC_PREFIX_0; curveidx++ /* to put the size after computation */; curveSz = SetCurve(key, curve+curveidx); if (curveSz < 0) return curveSz; /* set computed size */ curve[1] = (byte)curveSz; curveidx += curveSz; /* private */ privSz = key->dp->size; prv = (byte*)XMALLOC(privSz + privHdrSz + MAX_SEQ_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (prv == NULL) { return MEMORY_E; } prv[prvidx++] = ASN_OCTET_STRING; prv[prvidx++] = (byte)key->dp->size; ret = wc_ecc_export_private_only(key, prv + prvidx, &privSz); if (ret < 0) { XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); return ret; } prvidx += privSz; /* public */ ret = wc_ecc_export_x963(key, NULL, &pubSz); if (ret != LENGTH_ONLY_E) { XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); return ret; } pub = (byte*)XMALLOC(pubSz + pubHdrSz + MAX_SEQ_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER); if (pub == NULL) { XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); return MEMORY_E; } pub[pubidx++] = ECC_PREFIX_1; if (pubSz > 128) /* leading zero + extra size byte */ pubidx += SetLength(pubSz + ASN_ECC_CONTEXT_SZ + 2, pub+pubidx); else /* leading zero */ pubidx += SetLength(pubSz + ASN_ECC_CONTEXT_SZ + 1, pub+pubidx); pub[pubidx++] = ASN_BIT_STRING; pubidx += SetLength(pubSz + 1, pub+pubidx); pub[pubidx++] = (byte)0; /* leading zero */ ret = wc_ecc_export_x963(key, pub + pubidx, &pubSz); if (ret != 0) { XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); return ret; } pubidx += pubSz; /* make headers */ verSz = SetMyVersion(1, ver, FALSE); seqSz = SetSequence(verSz + prvidx + pubidx + curveidx, seq); totalSz = prvidx + pubidx + curveidx + verSz + seqSz; if (totalSz > (int)inLen) { XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); return BAD_FUNC_ARG; } /* write out */ /* seq */ XMEMCPY(output + idx, seq, seqSz); idx = seqSz; /* ver */ XMEMCPY(output + idx, ver, verSz); idx += verSz; /* private */ XMEMCPY(output + idx, prv, prvidx); idx += prvidx; XFREE(prv, NULL, DYNAMIC_TYPE_TMP_BUFFER); /* curve */ XMEMCPY(output + idx, curve, curveidx); idx += curveidx; /* public */ XMEMCPY(output + idx, pub, pubidx); /* idx += pubidx; not used after write, if more data remove comment */ XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER); return totalSz; } #endif /* WOLFSSL_KEY_GEN */ #endif /* HAVE_ECC */ #if defined(HAVE_OCSP) || defined(HAVE_CRL) /* Get raw Date only, no processing, 0 on success */ static int GetBasicDate(const byte* source, word32* idx, byte* date, byte* format, int maxIdx) { int length; WOLFSSL_ENTER("GetBasicDate"); *format = source[*idx]; *idx += 1; if (*format != ASN_UTC_TIME && *format != ASN_GENERALIZED_TIME) return ASN_TIME_E; if (GetLength(source, idx, &length, maxIdx) < 0) return ASN_PARSE_E; if (length > MAX_DATE_SIZE || length < MIN_DATE_SIZE) return ASN_DATE_SZ_E; XMEMCPY(date, &source[*idx], length); *idx += length; return 0; } #endif #ifdef HAVE_OCSP static int GetEnumerated(const byte* input, word32* inOutIdx, int *value) { word32 idx = *inOutIdx; word32 len; WOLFSSL_ENTER("GetEnumerated"); *value = 0; if (input[idx++] != ASN_ENUMERATED) return ASN_PARSE_E; len = input[idx++]; if (len > 4) return ASN_PARSE_E; while (len--) { *value = *value << 8 | input[idx++]; } *inOutIdx = idx; return *value; } static int DecodeSingleResponse(byte* source, word32* ioIndex, OcspResponse* resp, word32 size) { word32 idx = *ioIndex, prevIndex, oid; int length, wrapperSz; CertStatus* cs = resp->status; WOLFSSL_ENTER("DecodeSingleResponse"); /* Outer wrapper of the SEQUENCE OF Single Responses. */ if (GetSequence(source, &idx, &wrapperSz, size) < 0) return ASN_PARSE_E; prevIndex = idx; /* When making a request, we only request one status on one certificate * at a time. There should only be one SingleResponse */ /* Wrapper around the Single Response */ if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; /* Wrapper around the CertID */ if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; /* Skip the hash algorithm */ if (GetAlgoId(source, &idx, &oid, size) < 0) return ASN_PARSE_E; /* Save reference to the hash of CN */ if (source[idx++] != ASN_OCTET_STRING) return ASN_PARSE_E; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; resp->issuerHash = source + idx; idx += length; /* Save reference to the hash of the issuer public key */ if (source[idx++] != ASN_OCTET_STRING) return ASN_PARSE_E; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; resp->issuerKeyHash = source + idx; idx += length; /* Read the serial number, it is handled as a string, not as a * proper number. Just XMEMCPY the data over, rather than load it * as an mp_int. */ if (source[idx++] != ASN_INTEGER) return ASN_PARSE_E; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; if (length <= EXTERNAL_SERIAL_SIZE) { if (source[idx] == 0) { idx++; length--; } XMEMCPY(cs->serial, source + idx, length); cs->serialSz = length; } else { return ASN_GETINT_E; } idx += length; /* CertStatus */ switch (source[idx++]) { case (ASN_CONTEXT_SPECIFIC | CERT_GOOD): cs->status = CERT_GOOD; idx++; break; case (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | CERT_REVOKED): cs->status = CERT_REVOKED; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; idx += length; break; case (ASN_CONTEXT_SPECIFIC | CERT_UNKNOWN): cs->status = CERT_UNKNOWN; idx++; break; default: return ASN_PARSE_E; } if (GetBasicDate(source, &idx, cs->thisDate, &cs->thisDateFormat, size) < 0) return ASN_PARSE_E; if (!XVALIDATE_DATE(cs->thisDate, cs->thisDateFormat, BEFORE)) return ASN_BEFORE_DATE_E; /* The following items are optional. Only check for them if there is more * unprocessed data in the singleResponse wrapper. */ if (((int)(idx - prevIndex) < wrapperSz) && (source[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0))) { idx++; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; if (GetBasicDate(source, &idx, cs->nextDate, &cs->nextDateFormat, size) < 0) return ASN_PARSE_E; } if (((int)(idx - prevIndex) < wrapperSz) && (source[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1))) { idx++; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; idx += length; } *ioIndex = idx; return 0; } static int DecodeOcspRespExtensions(byte* source, word32* ioIndex, OcspResponse* resp, word32 sz) { word32 idx = *ioIndex; int length; int ext_bound; /* boundary index for the sequence of extensions */ word32 oid; WOLFSSL_ENTER("DecodeOcspRespExtensions"); if (source[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1)) return ASN_PARSE_E; if (GetLength(source, &idx, &length, sz) < 0) return ASN_PARSE_E; if (GetSequence(source, &idx, &length, sz) < 0) return ASN_PARSE_E; ext_bound = idx + length; while (idx < (word32)ext_bound) { if (GetSequence(source, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: should be a SEQUENCE"); return ASN_PARSE_E; } oid = 0; if (GetObjectId(source, &idx, &oid, sz) < 0) { WOLFSSL_MSG("\tfail: OBJECT ID"); return ASN_PARSE_E; } /* check for critical flag */ if (source[idx] == ASN_BOOLEAN) { WOLFSSL_MSG("\tfound optional critical flag, moving past"); idx += (ASN_BOOL_SIZE + 1); } /* process the extension based on the OID */ if (source[idx++] != ASN_OCTET_STRING) { WOLFSSL_MSG("\tfail: should be an OCTET STRING"); return ASN_PARSE_E; } if (GetLength(source, &idx, &length, sz) < 0) { WOLFSSL_MSG("\tfail: extension data length"); return ASN_PARSE_E; } if (oid == OCSP_NONCE_OID) { resp->nonce = source + idx; resp->nonceSz = length; } idx += length; } *ioIndex = idx; return 0; } static int DecodeResponseData(byte* source, word32* ioIndex, OcspResponse* resp, word32 size) { word32 idx = *ioIndex, prev_idx; int length; int version; word32 responderId = 0; WOLFSSL_ENTER("DecodeResponseData"); resp->response = source + idx; prev_idx = idx; if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; resp->responseSz = length + idx - prev_idx; /* Get version. It is an EXPLICIT[0] DEFAULT(0) value. If this * item isn't an EXPLICIT[0], then set version to zero and move * onto the next item. */ if (source[idx] == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED)) { idx += 2; /* Eat the value and length */ if (GetMyVersion(source, &idx, &version) < 0) return ASN_PARSE_E; } else version = 0; responderId = source[idx++]; if ((responderId == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 1)) || (responderId == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 2))) { if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; idx += length; } else return ASN_PARSE_E; /* save pointer to the producedAt time */ if (GetBasicDate(source, &idx, resp->producedDate, &resp->producedDateFormat, size) < 0) return ASN_PARSE_E; if (DecodeSingleResponse(source, &idx, resp, size) < 0) return ASN_PARSE_E; if (DecodeOcspRespExtensions(source, &idx, resp, size) < 0) return ASN_PARSE_E; *ioIndex = idx; return 0; } static int DecodeCerts(byte* source, word32* ioIndex, OcspResponse* resp, word32 size) { word32 idx = *ioIndex; WOLFSSL_ENTER("DecodeCerts"); if (source[idx++] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC)) { int length; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; resp->cert = source + idx; resp->certSz = length; idx += length; } *ioIndex = idx; return 0; } static int DecodeBasicOcspResponse(byte* source, word32* ioIndex, OcspResponse* resp, word32 size) { int length; word32 idx = *ioIndex; word32 end_index; WOLFSSL_ENTER("DecodeBasicOcspResponse"); if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; if (idx + length > size) return ASN_INPUT_E; end_index = idx + length; if (DecodeResponseData(source, &idx, resp, size) < 0) return ASN_PARSE_E; /* Get the signature algorithm */ if (GetAlgoId(source, &idx, &resp->sigOID, size) < 0) return ASN_PARSE_E; /* Obtain pointer to the start of the signature, and save the size */ if (source[idx++] == ASN_BIT_STRING) { int sigLength = 0; if (GetLength(source, &idx, &sigLength, size) < 0) return ASN_PARSE_E; resp->sigSz = sigLength; resp->sig = source + idx; idx += sigLength; } /* * Check the length of the BasicOcspResponse against the current index to * see if there are certificates, they are optional. */ if (idx < end_index) { DecodedCert cert; int ret; if (DecodeCerts(source, &idx, resp, size) < 0) return ASN_PARSE_E; InitDecodedCert(&cert, resp->cert, resp->certSz, 0); ret = ParseCertRelative(&cert, CA_TYPE, NO_VERIFY, 0); if (ret < 0) return ret; ret = ConfirmSignature(resp->response, resp->responseSz, cert.publicKey, cert.pubKeySize, cert.keyOID, resp->sig, resp->sigSz, resp->sigOID, NULL); FreeDecodedCert(&cert); if (ret == 0) { WOLFSSL_MSG("\tOCSP Confirm signature failed"); return ASN_OCSP_CONFIRM_E; } } *ioIndex = idx; return 0; } void InitOcspResponse(OcspResponse* resp, CertStatus* status, byte* source, word32 inSz) { WOLFSSL_ENTER("InitOcspResponse"); resp->responseStatus = -1; resp->response = NULL; resp->responseSz = 0; resp->producedDateFormat = 0; resp->issuerHash = NULL; resp->issuerKeyHash = NULL; resp->sig = NULL; resp->sigSz = 0; resp->sigOID = 0; resp->status = status; resp->nonce = NULL; resp->nonceSz = 0; resp->source = source; resp->maxIdx = inSz; } int OcspResponseDecode(OcspResponse* resp) { int length = 0; word32 idx = 0; byte* source = resp->source; word32 size = resp->maxIdx; word32 oid; WOLFSSL_ENTER("OcspResponseDecode"); /* peel the outer SEQUENCE wrapper */ if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; /* First get the responseStatus, an ENUMERATED */ if (GetEnumerated(source, &idx, &resp->responseStatus) < 0) return ASN_PARSE_E; if (resp->responseStatus != OCSP_SUCCESSFUL) return 0; /* Next is an EXPLICIT record called ResponseBytes, OPTIONAL */ if (idx >= size) return ASN_INPUT_E; if (source[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC)) return ASN_PARSE_E; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; /* Get the responseBytes SEQUENCE */ if (GetSequence(source, &idx, &length, size) < 0) return ASN_PARSE_E; /* Check ObjectID for the resposeBytes */ if (GetObjectId(source, &idx, &oid, size) < 0) return ASN_PARSE_E; if (oid != OCSP_BASIC_OID) return ASN_PARSE_E; if (source[idx++] != ASN_OCTET_STRING) return ASN_PARSE_E; if (GetLength(source, &idx, &length, size) < 0) return ASN_PARSE_E; if (DecodeBasicOcspResponse(source, &idx, resp, size) < 0) return ASN_PARSE_E; return 0; } static word32 SetOcspReqExtensions(word32 extSz, byte* output, const byte* nonce, word32 nonceSz) { static const byte NonceObjId[] = { 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07, 0x30, 0x01, 0x02 }; byte seqArray[5][MAX_SEQ_SZ]; word32 seqSz[5], totalSz; WOLFSSL_ENTER("SetOcspReqExtensions"); if (nonce == NULL || nonceSz == 0) return 0; seqArray[0][0] = ASN_OCTET_STRING; seqSz[0] = 1 + SetLength(nonceSz, &seqArray[0][1]); seqArray[1][0] = ASN_OBJECT_ID; seqSz[1] = 1 + SetLength(sizeof(NonceObjId), &seqArray[1][1]); totalSz = seqSz[0] + seqSz[1] + nonceSz + (word32)sizeof(NonceObjId); seqSz[2] = SetSequence(totalSz, seqArray[2]); totalSz += seqSz[2]; seqSz[3] = SetSequence(totalSz, seqArray[3]); totalSz += seqSz[3]; seqArray[4][0] = (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 2); seqSz[4] = 1 + SetLength(totalSz, &seqArray[4][1]); totalSz += seqSz[4]; if (totalSz < extSz) { totalSz = 0; XMEMCPY(output + totalSz, seqArray[4], seqSz[4]); totalSz += seqSz[4]; XMEMCPY(output + totalSz, seqArray[3], seqSz[3]); totalSz += seqSz[3]; XMEMCPY(output + totalSz, seqArray[2], seqSz[2]); totalSz += seqSz[2]; XMEMCPY(output + totalSz, seqArray[1], seqSz[1]); totalSz += seqSz[1]; XMEMCPY(output + totalSz, NonceObjId, sizeof(NonceObjId)); totalSz += (word32)sizeof(NonceObjId); XMEMCPY(output + totalSz, seqArray[0], seqSz[0]); totalSz += seqSz[0]; XMEMCPY(output + totalSz, nonce, nonceSz); totalSz += nonceSz; } return totalSz; } int EncodeOcspRequest(OcspRequest* req) { byte seqArray[5][MAX_SEQ_SZ]; /* The ASN.1 of the OCSP Request is an onion of sequences */ byte algoArray[MAX_ALGO_SZ]; byte issuerArray[MAX_ENCODED_DIG_SZ]; byte issuerKeyArray[MAX_ENCODED_DIG_SZ]; byte snArray[MAX_SN_SZ]; byte extArray[MAX_OCSP_EXT_SZ]; byte* output = req->dest; word32 seqSz[5], algoSz, issuerSz, issuerKeySz, snSz, extSz, totalSz; int i; WOLFSSL_ENTER("EncodeOcspRequest"); #ifdef NO_SHA algoSz = SetAlgoID(SHA256h, algoArray, hashType, 0); #else algoSz = SetAlgoID(SHAh, algoArray, hashType, 0); #endif req->issuerHash = req->cert->issuerHash; issuerSz = SetDigest(req->cert->issuerHash, KEYID_SIZE, issuerArray); req->issuerKeyHash = req->cert->issuerKeyHash; issuerKeySz = SetDigest(req->cert->issuerKeyHash, KEYID_SIZE, issuerKeyArray); req->serial = req->cert->serial; req->serialSz = req->cert->serialSz; snSz = SetSerialNumber(req->cert->serial, req->cert->serialSz, snArray); extSz = 0; if (req->useNonce) { WC_RNG rng; if (wc_InitRng(&rng) != 0) { WOLFSSL_MSG("\tCannot initialize RNG. Skipping the OSCP Nonce."); } else { if (wc_RNG_GenerateBlock(&rng, req->nonce, MAX_OCSP_NONCE_SZ) != 0) WOLFSSL_MSG("\tCannot run RNG. Skipping the OSCP Nonce."); else { req->nonceSz = MAX_OCSP_NONCE_SZ; extSz = SetOcspReqExtensions(MAX_OCSP_EXT_SZ, extArray, req->nonce, req->nonceSz); } wc_FreeRng(&rng); } } totalSz = algoSz + issuerSz + issuerKeySz + snSz; for (i = 4; i >= 0; i--) { seqSz[i] = SetSequence(totalSz, seqArray[i]); totalSz += seqSz[i]; if (i == 2) totalSz += extSz; } totalSz = 0; for (i = 0; i < 5; i++) { XMEMCPY(output + totalSz, seqArray[i], seqSz[i]); totalSz += seqSz[i]; } XMEMCPY(output + totalSz, algoArray, algoSz); totalSz += algoSz; XMEMCPY(output + totalSz, issuerArray, issuerSz); totalSz += issuerSz; XMEMCPY(output + totalSz, issuerKeyArray, issuerKeySz); totalSz += issuerKeySz; XMEMCPY(output + totalSz, snArray, snSz); totalSz += snSz; if (extSz != 0) { XMEMCPY(output + totalSz, extArray, extSz); totalSz += extSz; } return totalSz; } void InitOcspRequest(OcspRequest* req, DecodedCert* cert, byte useNonce, byte* dest, word32 destSz) { WOLFSSL_ENTER("InitOcspRequest"); req->cert = cert; req->useNonce = useNonce; req->nonceSz = 0; req->issuerHash = NULL; req->issuerKeyHash = NULL; req->serial = NULL; req->dest = dest; req->destSz = destSz; } int CompareOcspReqResp(OcspRequest* req, OcspResponse* resp) { int cmp; WOLFSSL_ENTER("CompareOcspReqResp"); if (req == NULL) { WOLFSSL_MSG("\tReq missing"); return -1; } if (resp == NULL) { WOLFSSL_MSG("\tResp missing"); return 1; } /* Nonces are not critical. The responder may not necessarily add * the nonce to the response. */ if (req->useNonce && resp->nonceSz != 0) { cmp = req->nonceSz - resp->nonceSz; if (cmp != 0) { WOLFSSL_MSG("\tnonceSz mismatch"); return cmp; } cmp = XMEMCMP(req->nonce, resp->nonce, req->nonceSz); if (cmp != 0) { WOLFSSL_MSG("\tnonce mismatch"); return cmp; } } cmp = XMEMCMP(req->issuerHash, resp->issuerHash, KEYID_SIZE); if (cmp != 0) { WOLFSSL_MSG("\tissuerHash mismatch"); return cmp; } cmp = XMEMCMP(req->issuerKeyHash, resp->issuerKeyHash, KEYID_SIZE); if (cmp != 0) { WOLFSSL_MSG("\tissuerKeyHash mismatch"); return cmp; } cmp = req->serialSz - resp->status->serialSz; if (cmp != 0) { WOLFSSL_MSG("\tserialSz mismatch"); return cmp; } cmp = XMEMCMP(req->serial, resp->status->serial, req->serialSz); if (cmp != 0) { WOLFSSL_MSG("\tserial mismatch"); return cmp; } return 0; } #endif /* store SHA hash of NAME */ WOLFSSL_LOCAL int GetNameHash(const byte* source, word32* idx, byte* hash, int maxIdx) { int length; /* length of all distinguished names */ int ret; word32 dummy; WOLFSSL_ENTER("GetNameHash"); if (source[*idx] == ASN_OBJECT_ID) { WOLFSSL_MSG("Trying optional prefix..."); if (GetLength(source, idx, &length, maxIdx) < 0) return ASN_PARSE_E; *idx += length; WOLFSSL_MSG("Got optional prefix"); } /* For OCSP, RFC2560 section 4.1.1 states the issuer hash should be * calculated over the entire DER encoding of the Name field, including * the tag and length. */ dummy = *idx; if (GetSequence(source, idx, &length, maxIdx) < 0) return ASN_PARSE_E; #ifdef NO_SHA ret = wc_Sha256Hash(source + dummy, length + *idx - dummy, hash); #else ret = wc_ShaHash(source + dummy, length + *idx - dummy, hash); #endif *idx += length; return ret; } #ifdef HAVE_CRL /* initialize decoded CRL */ void InitDecodedCRL(DecodedCRL* dcrl) { WOLFSSL_MSG("InitDecodedCRL"); dcrl->certBegin = 0; dcrl->sigIndex = 0; dcrl->sigLength = 0; dcrl->signatureOID = 0; dcrl->certs = NULL; dcrl->totalCerts = 0; } /* free decoded CRL resources */ void FreeDecodedCRL(DecodedCRL* dcrl) { RevokedCert* tmp = dcrl->certs; WOLFSSL_MSG("FreeDecodedCRL"); while(tmp) { RevokedCert* next = tmp->next; XFREE(tmp, NULL, DYNAMIC_TYPE_REVOKED); tmp = next; } } /* Get Revoked Cert list, 0 on success */ static int GetRevoked(const byte* buff, word32* idx, DecodedCRL* dcrl, int maxIdx) { int len; word32 end; byte b; RevokedCert* rc; WOLFSSL_ENTER("GetRevoked"); if (GetSequence(buff, idx, &len, maxIdx) < 0) return ASN_PARSE_E; end = *idx + len; /* get serial number */ b = buff[*idx]; *idx += 1; if (b != ASN_INTEGER) { WOLFSSL_MSG("Expecting Integer"); return ASN_PARSE_E; } if (GetLength(buff, idx, &len, maxIdx) < 0) return ASN_PARSE_E; if (len > EXTERNAL_SERIAL_SIZE) { WOLFSSL_MSG("Serial Size too big"); return ASN_PARSE_E; } rc = (RevokedCert*)XMALLOC(sizeof(RevokedCert), NULL, DYNAMIC_TYPE_CRL); if (rc == NULL) { WOLFSSL_MSG("Alloc Revoked Cert failed"); return MEMORY_E; } XMEMCPY(rc->serialNumber, &buff[*idx], len); rc->serialSz = len; /* add to list */ rc->next = dcrl->certs; dcrl->certs = rc; dcrl->totalCerts++; *idx += len; /* get date */ b = buff[*idx]; *idx += 1; if (b != ASN_UTC_TIME && b != ASN_GENERALIZED_TIME) { WOLFSSL_MSG("Expecting Date"); return ASN_PARSE_E; } if (GetLength(buff, idx, &len, maxIdx) < 0) return ASN_PARSE_E; /* skip for now */ *idx += len; if (*idx != end) /* skip extensions */ *idx = end; return 0; } /* Get CRL Signature, 0 on success */ static int GetCRL_Signature(const byte* source, word32* idx, DecodedCRL* dcrl, int maxIdx) { int length; byte b; WOLFSSL_ENTER("GetCRL_Signature"); b = source[*idx]; *idx += 1; if (b != ASN_BIT_STRING) return ASN_BITSTR_E; if (GetLength(source, idx, &length, maxIdx) < 0) return ASN_PARSE_E; dcrl->sigLength = length; b = source[*idx]; *idx += 1; if (b != 0x00) return ASN_EXPECT_0_E; dcrl->sigLength--; dcrl->signature = (byte*)&source[*idx]; *idx += dcrl->sigLength; return 0; } /* prase crl buffer into decoded state, 0 on success */ int ParseCRL(DecodedCRL* dcrl, const byte* buff, word32 sz, void* cm) { int version, len, doNextDate = 1; word32 oid, idx = 0, dateIdx; Signer* ca = NULL; WOLFSSL_MSG("ParseCRL"); /* raw crl hash */ /* hash here if needed for optimized comparisons * Sha sha; * wc_InitSha(&sha); * wc_ShaUpdate(&sha, buff, sz); * wc_ShaFinal(&sha, dcrl->crlHash); */ if (GetSequence(buff, &idx, &len, sz) < 0) return ASN_PARSE_E; dcrl->certBegin = idx; if (GetSequence(buff, &idx, &len, sz) < 0) return ASN_PARSE_E; dcrl->sigIndex = len + idx; /* may have version */ if (buff[idx] == ASN_INTEGER) { if (GetMyVersion(buff, &idx, &version) < 0) return ASN_PARSE_E; } if (GetAlgoId(buff, &idx, &oid, sz) < 0) return ASN_PARSE_E; if (GetNameHash(buff, &idx, dcrl->issuerHash, sz) < 0) return ASN_PARSE_E; if (GetBasicDate(buff, &idx, dcrl->lastDate, &dcrl->lastDateFormat, sz) < 0) return ASN_PARSE_E; dateIdx = idx; if (GetBasicDate(buff, &idx, dcrl->nextDate, &dcrl->nextDateFormat, sz) < 0) { #ifndef WOLFSSL_NO_CRL_NEXT_DATE (void)dateIdx; return ASN_PARSE_E; #else dcrl->nextDateFormat = ASN_OTHER_TYPE; /* skip flag */ doNextDate = 0; idx = dateIdx; #endif } if (doNextDate && !XVALIDATE_DATE(dcrl->nextDate, dcrl->nextDateFormat, AFTER)) { WOLFSSL_MSG("CRL after date is no longer valid"); return ASN_AFTER_DATE_E; } if (idx != dcrl->sigIndex && buff[idx] != CRL_EXTENSIONS) { if (GetSequence(buff, &idx, &len, sz) < 0) return ASN_PARSE_E; len += idx; while (idx < (word32)len) { if (GetRevoked(buff, &idx, dcrl, sz) < 0) return ASN_PARSE_E; } } if (idx != dcrl->sigIndex) idx = dcrl->sigIndex; /* skip extensions */ if (GetAlgoId(buff, &idx, &dcrl->signatureOID, sz) < 0) return ASN_PARSE_E; if (GetCRL_Signature(buff, &idx, dcrl, sz) < 0) return ASN_PARSE_E; /* openssl doesn't add skid by default for CRLs cause firefox chokes we're not assuming it's available yet */ #if !defined(NO_SKID) && defined(CRL_SKID_READY) if (dcrl->extAuthKeyIdSet) ca = GetCA(cm, dcrl->extAuthKeyId); if (ca == NULL) ca = GetCAByName(cm, dcrl->issuerHash); #else /* NO_SKID */ ca = GetCA(cm, dcrl->issuerHash); #endif /* NO_SKID */ WOLFSSL_MSG("About to verify CRL signature"); if (ca) { WOLFSSL_MSG("Found CRL issuer CA"); /* try to confirm/verify signature */ #ifndef IGNORE_KEY_EXTENSIONS if ((ca->keyUsage & KEYUSE_CRL_SIGN) == 0) { WOLFSSL_MSG("CA cannot sign CRLs"); return ASN_CRL_NO_SIGNER_E; } #endif /* IGNORE_KEY_EXTENSIONS */ if (!ConfirmSignature(buff + dcrl->certBegin, dcrl->sigIndex - dcrl->certBegin, ca->publicKey, ca->pubKeySize, ca->keyOID, dcrl->signature, dcrl->sigLength, dcrl->signatureOID, NULL)) { WOLFSSL_MSG("CRL Confirm signature failed"); return ASN_CRL_CONFIRM_E; } } else { WOLFSSL_MSG("Did NOT find CRL issuer CA"); return ASN_CRL_NO_SIGNER_E; } return 0; } #endif /* HAVE_CRL */ #endif #ifdef WOLFSSL_SEP #endif /* WOLFSSL_SEP */