[164] | 1 | /* pwdbased.c
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| 2 | *
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| 3 | * Copyright (C) 2006-2015 wolfSSL Inc.
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| 4 | *
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| 5 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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| 6 | *
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| 7 | * wolfSSL is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * wolfSSL is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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| 20 | */
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| 21 |
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| 22 | #ifdef HAVE_CONFIG_H
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| 23 | #include <config.h>
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| 24 | #endif
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| 25 |
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| 26 | #include <wolfssl/wolfcrypt/settings.h>
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| 27 |
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| 28 | #ifndef NO_PWDBASED
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| 29 |
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| 30 | #ifdef WOLFSSL_PIC32MZ_HASH
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| 31 | #ifndef NO_MD5
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| 32 | #define wc_InitMd5 wc_InitMd5_sw
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| 33 | #define wc_Md5Update wc_Md5Update_sw
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| 34 | #define wc_Md5Final wc_Md5Final_sw
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| 35 | #endif /* NO_MD5 */
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| 36 |
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| 37 | #define wc_InitSha wc_InitSha_sw
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| 38 | #define wc_ShaUpdate wc_ShaUpdate_sw
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| 39 | #define wc_ShaFinal wc_ShaFinal_sw
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| 40 |
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| 41 | #define wc_InitSha256 wc_InitSha256_sw
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| 42 | #define wc_Sha256Update wc_Sha256Update_sw
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| 43 | #define wc_Sha256Final wc_Sha256Final_sw
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| 44 | #endif
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| 45 |
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| 46 | #include <wolfssl/wolfcrypt/pwdbased.h>
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| 47 | #include <wolfssl/wolfcrypt/hmac.h>
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| 48 | #include <wolfssl/wolfcrypt/integer.h>
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| 49 | #include <wolfssl/wolfcrypt/error-crypt.h>
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| 50 | #if defined(WOLFSSL_SHA512) || defined(WOLFSSL_SHA384)
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| 51 | #include <wolfssl/wolfcrypt/sha512.h>
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| 52 | #endif
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| 53 |
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| 54 | #ifdef NO_INLINE
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| 55 | #include <wolfssl/wolfcrypt/misc.h>
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| 56 | #else
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| 57 | #include <wolfcrypt/src/misc.c>
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| 58 | #endif
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| 59 |
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| 60 | #ifdef min
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| 61 | #define WOLFSSL_HAVE_MIN
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| 62 | #endif
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| 63 | #ifndef WOLFSSL_HAVE_MIN
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| 64 | #define WOLFSSL_HAVE_MIN
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| 65 |
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| 66 | static INLINE word32 min(word32 a, word32 b)
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| 67 | {
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| 68 | return a > b ? b : a;
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| 69 | }
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| 70 |
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| 71 | #endif /* WOLFSSL_HAVE_MIN */
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| 72 |
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| 73 |
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| 74 | #ifndef NO_SHA
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| 75 | /* PBKDF1 needs at least SHA available */
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| 76 | int wc_PBKDF1(byte* output, const byte* passwd, int pLen, const byte* salt,
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| 77 | int sLen, int iterations, int kLen, int hashType)
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| 78 | {
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| 79 | Sha sha;
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| 80 | #ifndef NO_MD5
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| 81 | Md5 md5;
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| 82 | #endif
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| 83 | int hLen = (int)SHA_DIGEST_SIZE;
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| 84 | int i, ret = 0;
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| 85 | byte buffer[SHA_DIGEST_SIZE]; /* max size */
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| 86 |
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| 87 | if (hashType != MD5 && hashType != SHA)
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| 88 | return BAD_FUNC_ARG;
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| 89 |
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| 90 | #ifndef NO_MD5
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| 91 | if (hashType == MD5)
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| 92 | hLen = (int)MD5_DIGEST_SIZE;
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| 93 | #endif
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| 94 |
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| 95 | if (kLen > hLen)
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| 96 | return BAD_FUNC_ARG;
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| 97 |
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| 98 | if (iterations < 1)
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| 99 | return BAD_FUNC_ARG;
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| 100 |
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| 101 | switch (hashType) {
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| 102 | #ifndef NO_MD5
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| 103 | case MD5:
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| 104 | wc_InitMd5(&md5);
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| 105 | wc_Md5Update(&md5, passwd, pLen);
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| 106 | wc_Md5Update(&md5, salt, sLen);
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| 107 | wc_Md5Final(&md5, buffer);
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| 108 | break;
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| 109 | #endif /* NO_MD5 */
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| 110 | case SHA:
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| 111 | default:
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| 112 | ret = wc_InitSha(&sha);
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| 113 | if (ret != 0)
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| 114 | return ret;
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| 115 | wc_ShaUpdate(&sha, passwd, pLen);
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| 116 | wc_ShaUpdate(&sha, salt, sLen);
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| 117 | wc_ShaFinal(&sha, buffer);
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| 118 | break;
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| 119 | }
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| 120 |
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| 121 | for (i = 1; i < iterations; i++) {
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| 122 | if (hashType == SHA) {
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| 123 | wc_ShaUpdate(&sha, buffer, hLen);
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| 124 | wc_ShaFinal(&sha, buffer);
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| 125 | }
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| 126 | #ifndef NO_MD5
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| 127 | else {
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| 128 | wc_Md5Update(&md5, buffer, hLen);
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| 129 | wc_Md5Final(&md5, buffer);
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| 130 | }
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| 131 | #endif
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| 132 | }
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| 133 | XMEMCPY(output, buffer, kLen);
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| 134 |
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| 135 | return 0;
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| 136 | }
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| 137 | #endif /* NO_SHA */
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| 138 |
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| 139 |
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| 140 | int GetDigestSize(int hashType)
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| 141 | {
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| 142 | int hLen;
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| 143 |
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| 144 | switch (hashType) {
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| 145 | #ifndef NO_MD5
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| 146 | case MD5:
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| 147 | hLen = MD5_DIGEST_SIZE;
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| 148 | break;
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| 149 | #endif
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| 150 | #ifndef NO_SHA
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| 151 | case SHA:
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| 152 | hLen = SHA_DIGEST_SIZE;
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| 153 | break;
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| 154 | #endif
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| 155 | #ifndef NO_SHA256
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| 156 | case SHA256:
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| 157 | hLen = SHA256_DIGEST_SIZE;
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| 158 | break;
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| 159 | #endif
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| 160 | #ifdef WOLFSSL_SHA512
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| 161 | case SHA512:
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| 162 | hLen = SHA512_DIGEST_SIZE;
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| 163 | break;
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| 164 | #endif
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| 165 | default:
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| 166 | return BAD_FUNC_ARG;
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| 167 | }
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| 168 |
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| 169 | return hLen;
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| 170 | }
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| 171 |
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| 172 |
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| 173 | int wc_PBKDF2(byte* output, const byte* passwd, int pLen, const byte* salt,
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| 174 | int sLen, int iterations, int kLen, int hashType)
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| 175 | {
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| 176 | word32 i = 1;
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| 177 | int hLen;
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| 178 | int j, ret;
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| 179 | Hmac hmac;
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| 180 | #ifdef WOLFSSL_SMALL_STACK
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| 181 | byte* buffer;
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| 182 | #else
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| 183 | byte buffer[MAX_DIGEST_SIZE];
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| 184 | #endif
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| 185 |
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| 186 | hLen = GetDigestSize(hashType);
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| 187 | if (hLen < 0)
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| 188 | return BAD_FUNC_ARG;
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| 189 |
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| 190 | #ifdef WOLFSSL_SMALL_STACK
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| 191 | buffer = (byte*)XMALLOC(MAX_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 192 | if (buffer == NULL)
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| 193 | return MEMORY_E;
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| 194 | #endif
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| 195 |
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| 196 | ret = wc_HmacSetKey(&hmac, hashType, passwd, pLen);
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| 197 |
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| 198 | if (ret == 0) {
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| 199 | while (kLen) {
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| 200 | int currentLen;
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| 201 |
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| 202 | ret = wc_HmacUpdate(&hmac, salt, sLen);
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| 203 | if (ret != 0)
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| 204 | break;
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| 205 |
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| 206 | /* encode i */
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| 207 | for (j = 0; j < 4; j++) {
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| 208 | byte b = (byte)(i >> ((3-j) * 8));
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| 209 |
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| 210 | ret = wc_HmacUpdate(&hmac, &b, 1);
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| 211 | if (ret != 0)
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| 212 | break;
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| 213 | }
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| 214 |
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| 215 | /* check ret from inside for loop */
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| 216 | if (ret != 0)
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| 217 | break;
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| 218 |
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| 219 | ret = wc_HmacFinal(&hmac, buffer);
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| 220 | if (ret != 0)
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| 221 | break;
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| 222 |
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| 223 | currentLen = min(kLen, hLen);
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| 224 | XMEMCPY(output, buffer, currentLen);
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| 225 |
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| 226 | for (j = 1; j < iterations; j++) {
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| 227 | ret = wc_HmacUpdate(&hmac, buffer, hLen);
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| 228 | if (ret != 0)
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| 229 | break;
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| 230 | ret = wc_HmacFinal(&hmac, buffer);
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| 231 | if (ret != 0)
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| 232 | break;
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| 233 | xorbuf(output, buffer, currentLen);
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| 234 | }
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| 235 |
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| 236 | /* check ret from inside for loop */
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| 237 | if (ret != 0)
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| 238 | break;
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| 239 |
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| 240 | output += currentLen;
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| 241 | kLen -= currentLen;
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| 242 | i++;
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| 243 | }
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| 244 | }
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| 245 |
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| 246 | #ifdef WOLFSSL_SMALL_STACK
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| 247 | XFREE(buffer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 248 | #endif
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| 249 |
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| 250 | return ret;
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| 251 | }
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| 252 |
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| 253 | #ifdef WOLFSSL_SHA512
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| 254 | #define PBKDF_DIGEST_SIZE SHA512_BLOCK_SIZE
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| 255 | #elif !defined(NO_SHA256)
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| 256 | #define PBKDF_DIGEST_SIZE SHA256_BLOCK_SIZE
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| 257 | #else
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| 258 | #define PBKDF_DIGEST_SIZE SHA_DIGEST_SIZE
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| 259 | #endif
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| 260 |
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| 261 | /* helper for wc_PKCS12_PBKDF(), sets block and digest sizes */
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| 262 | int GetPKCS12HashSizes(int hashType, word32* v, word32* u)
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| 263 | {
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| 264 | if (!v || !u)
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| 265 | return BAD_FUNC_ARG;
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| 266 |
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| 267 | switch (hashType) {
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| 268 | #ifndef NO_MD5
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| 269 | case MD5:
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| 270 | *v = MD5_BLOCK_SIZE;
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| 271 | *u = MD5_DIGEST_SIZE;
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| 272 | break;
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| 273 | #endif
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| 274 | #ifndef NO_SHA
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| 275 | case SHA:
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| 276 | *v = SHA_BLOCK_SIZE;
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| 277 | *u = SHA_DIGEST_SIZE;
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| 278 | break;
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| 279 | #endif
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| 280 | #ifndef NO_SHA256
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| 281 | case SHA256:
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| 282 | *v = SHA256_BLOCK_SIZE;
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| 283 | *u = SHA256_DIGEST_SIZE;
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| 284 | break;
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| 285 | #endif
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| 286 | #ifdef WOLFSSL_SHA512
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| 287 | case SHA512:
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| 288 | *v = SHA512_BLOCK_SIZE;
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| 289 | *u = SHA512_DIGEST_SIZE;
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| 290 | break;
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| 291 | #endif
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| 292 | default:
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| 293 | return BAD_FUNC_ARG;
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| 294 | }
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| 295 |
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| 296 | return 0;
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| 297 | }
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| 298 |
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| 299 | /* helper for PKCS12_PBKDF(), does hash operation */
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| 300 | int DoPKCS12Hash(int hashType, byte* buffer, word32 totalLen,
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| 301 | byte* Ai, word32 u, int iterations)
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| 302 | {
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| 303 | int i;
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| 304 | int ret = 0;
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| 305 |
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| 306 | if (buffer == NULL || Ai == NULL)
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| 307 | return BAD_FUNC_ARG;
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| 308 |
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| 309 | switch (hashType) {
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| 310 | #ifndef NO_MD5
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| 311 | case MD5:
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| 312 | {
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| 313 | Md5 md5;
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| 314 | wc_InitMd5(&md5);
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| 315 | wc_Md5Update(&md5, buffer, totalLen);
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| 316 | wc_Md5Final(&md5, Ai);
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| 317 |
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| 318 | for (i = 1; i < iterations; i++) {
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| 319 | wc_Md5Update(&md5, Ai, u);
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| 320 | wc_Md5Final(&md5, Ai);
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| 321 | }
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| 322 | }
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| 323 | break;
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| 324 | #endif /* NO_MD5 */
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| 325 | #ifndef NO_SHA
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| 326 | case SHA:
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| 327 | {
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| 328 | Sha sha;
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| 329 | ret = wc_InitSha(&sha);
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| 330 | if (ret != 0)
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| 331 | break;
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| 332 | wc_ShaUpdate(&sha, buffer, totalLen);
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| 333 | wc_ShaFinal(&sha, Ai);
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| 334 |
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| 335 | for (i = 1; i < iterations; i++) {
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| 336 | wc_ShaUpdate(&sha, Ai, u);
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| 337 | wc_ShaFinal(&sha, Ai);
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| 338 | }
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| 339 | }
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| 340 | break;
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| 341 | #endif /* NO_SHA */
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| 342 | #ifndef NO_SHA256
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| 343 | case SHA256:
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| 344 | {
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| 345 | Sha256 sha256;
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| 346 | ret = wc_InitSha256(&sha256);
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| 347 | if (ret != 0)
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| 348 | break;
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| 349 |
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| 350 | ret = wc_Sha256Update(&sha256, buffer, totalLen);
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| 351 | if (ret != 0)
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| 352 | break;
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| 353 |
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| 354 | ret = wc_Sha256Final(&sha256, Ai);
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| 355 | if (ret != 0)
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| 356 | break;
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| 357 |
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| 358 | for (i = 1; i < iterations; i++) {
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| 359 | ret = wc_Sha256Update(&sha256, Ai, u);
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| 360 | if (ret != 0)
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| 361 | break;
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| 362 |
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| 363 | ret = wc_Sha256Final(&sha256, Ai);
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| 364 | if (ret != 0)
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| 365 | break;
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| 366 | }
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| 367 | }
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| 368 | break;
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| 369 | #endif /* NO_SHA256 */
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| 370 | #ifdef WOLFSSL_SHA512
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| 371 | case SHA512:
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| 372 | {
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| 373 | Sha512 sha512;
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| 374 | ret = wc_InitSha512(&sha512);
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| 375 | if (ret != 0)
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| 376 | break;
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| 377 |
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| 378 | ret = wc_Sha512Update(&sha512, buffer, totalLen);
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| 379 | if (ret != 0)
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| 380 | break;
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| 381 |
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| 382 | ret = wc_Sha512Final(&sha512, Ai);
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| 383 | if (ret != 0)
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| 384 | break;
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| 385 |
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| 386 | for (i = 1; i < iterations; i++) {
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| 387 | ret = wc_Sha512Update(&sha512, Ai, u);
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| 388 | if (ret != 0)
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| 389 | break;
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| 390 |
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| 391 | ret = wc_Sha512Final(&sha512, Ai);
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| 392 | if (ret != 0)
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| 393 | break;
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| 394 | }
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| 395 | }
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| 396 | break;
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| 397 | #endif /* WOLFSSL_SHA512 */
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| 398 |
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| 399 | default:
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| 400 | ret = BAD_FUNC_ARG;
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| 401 | break;
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| 402 | }
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| 403 |
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| 404 | return ret;
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| 405 | }
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| 406 |
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| 407 | int wc_PKCS12_PBKDF(byte* output, const byte* passwd, int passLen,const byte* salt,
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| 408 | int saltLen, int iterations, int kLen, int hashType, int id)
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| 409 | {
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| 410 | /* all in bytes instead of bits */
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| 411 | word32 u, v, dLen, pLen, iLen, sLen, totalLen;
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| 412 | int dynamic = 0;
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| 413 | int ret = 0;
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| 414 | int i;
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| 415 | byte *D, *S, *P, *I;
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| 416 | #ifdef WOLFSSL_SMALL_STACK
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| 417 | byte staticBuffer[1]; /* force dynamic usage */
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| 418 | #else
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| 419 | byte staticBuffer[1024];
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| 420 | #endif
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| 421 | byte* buffer = staticBuffer;
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| 422 |
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| 423 | #ifdef WOLFSSL_SMALL_STACK
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| 424 | byte* Ai;
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| 425 | byte* B;
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| 426 | #else
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| 427 | byte Ai[PBKDF_DIGEST_SIZE];
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| 428 | byte B[PBKDF_DIGEST_SIZE];
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| 429 | #endif
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| 430 |
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| 431 | if (!iterations)
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| 432 | iterations = 1;
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| 433 |
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| 434 | ret = GetPKCS12HashSizes(hashType, &v, &u);
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| 435 | if (ret < 0)
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| 436 | return BAD_FUNC_ARG;
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| 437 |
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| 438 | #ifdef WOLFSSL_SMALL_STACK
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| 439 | Ai = (byte*)XMALLOC(PBKDF_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 440 | if (Ai == NULL)
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| 441 | return MEMORY_E;
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| 442 |
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| 443 | B = (byte*)XMALLOC(PBKDF_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 444 | if (B == NULL) {
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| 445 | XFREE(Ai, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 446 | return MEMORY_E;
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| 447 | }
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| 448 | #endif
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| 449 |
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| 450 | XMEMSET(Ai, 0, PBKDF_DIGEST_SIZE);
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| 451 | XMEMSET(B, 0, PBKDF_DIGEST_SIZE);
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| 452 |
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| 453 | dLen = v;
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| 454 | sLen = v * ((saltLen + v - 1) / v);
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| 455 | if (passLen)
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| 456 | pLen = v * ((passLen + v - 1) / v);
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| 457 | else
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| 458 | pLen = 0;
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| 459 | iLen = sLen + pLen;
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| 460 |
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| 461 | totalLen = dLen + sLen + pLen;
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| 462 |
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| 463 | if (totalLen > sizeof(staticBuffer)) {
|
---|
| 464 | buffer = (byte*)XMALLOC(totalLen, 0, DYNAMIC_TYPE_KEY);
|
---|
| 465 | if (buffer == NULL) {
|
---|
| 466 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 467 | XFREE(Ai, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 468 | XFREE(B, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 469 | #endif
|
---|
| 470 | return MEMORY_E;
|
---|
| 471 | }
|
---|
| 472 | dynamic = 1;
|
---|
| 473 | }
|
---|
| 474 |
|
---|
| 475 | D = buffer;
|
---|
| 476 | S = D + dLen;
|
---|
| 477 | P = S + sLen;
|
---|
| 478 | I = S;
|
---|
| 479 |
|
---|
| 480 | XMEMSET(D, id, dLen);
|
---|
| 481 |
|
---|
| 482 | for (i = 0; i < (int)sLen; i++)
|
---|
| 483 | S[i] = salt[i % saltLen];
|
---|
| 484 | for (i = 0; i < (int)pLen; i++)
|
---|
| 485 | P[i] = passwd[i % passLen];
|
---|
| 486 |
|
---|
| 487 | while (kLen > 0) {
|
---|
| 488 | word32 currentLen;
|
---|
| 489 | mp_int B1;
|
---|
| 490 |
|
---|
| 491 | ret = DoPKCS12Hash(hashType, buffer, totalLen, Ai, u, iterations);
|
---|
| 492 | if (ret < 0)
|
---|
| 493 | break;
|
---|
| 494 |
|
---|
| 495 | for (i = 0; i < (int)v; i++)
|
---|
| 496 | B[i] = Ai[i % u];
|
---|
| 497 |
|
---|
| 498 | if (mp_init(&B1) != MP_OKAY)
|
---|
| 499 | ret = MP_INIT_E;
|
---|
| 500 | else if (mp_read_unsigned_bin(&B1, B, v) != MP_OKAY)
|
---|
| 501 | ret = MP_READ_E;
|
---|
| 502 | else if (mp_add_d(&B1, (mp_digit)1, &B1) != MP_OKAY)
|
---|
| 503 | ret = MP_ADD_E;
|
---|
| 504 |
|
---|
| 505 | if (ret != 0) {
|
---|
| 506 | mp_clear(&B1);
|
---|
| 507 | break;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | for (i = 0; i < (int)iLen; i += v) {
|
---|
| 511 | int outSz;
|
---|
| 512 | mp_int i1;
|
---|
| 513 | mp_int res;
|
---|
| 514 |
|
---|
| 515 | if (mp_init_multi(&i1, &res, NULL, NULL, NULL, NULL) != MP_OKAY) {
|
---|
| 516 | ret = MP_INIT_E;
|
---|
| 517 | break;
|
---|
| 518 | }
|
---|
| 519 | if (mp_read_unsigned_bin(&i1, I + i, v) != MP_OKAY)
|
---|
| 520 | ret = MP_READ_E;
|
---|
| 521 | else if (mp_add(&i1, &B1, &res) != MP_OKAY)
|
---|
| 522 | ret = MP_ADD_E;
|
---|
| 523 | else if ( (outSz = mp_unsigned_bin_size(&res)) < 0)
|
---|
| 524 | ret = MP_TO_E;
|
---|
| 525 | else {
|
---|
| 526 | if (outSz > (int)v) {
|
---|
| 527 | /* take off MSB */
|
---|
| 528 | byte tmp[129];
|
---|
| 529 | ret = mp_to_unsigned_bin(&res, tmp);
|
---|
| 530 | XMEMCPY(I + i, tmp + 1, v);
|
---|
| 531 | }
|
---|
| 532 | else if (outSz < (int)v) {
|
---|
| 533 | XMEMSET(I + i, 0, v - outSz);
|
---|
| 534 | ret = mp_to_unsigned_bin(&res, I + i + v - outSz);
|
---|
| 535 | }
|
---|
| 536 | else
|
---|
| 537 | ret = mp_to_unsigned_bin(&res, I + i);
|
---|
| 538 | }
|
---|
| 539 |
|
---|
| 540 | mp_clear(&i1);
|
---|
| 541 | mp_clear(&res);
|
---|
| 542 | if (ret < 0) break;
|
---|
| 543 | }
|
---|
| 544 |
|
---|
| 545 | currentLen = min(kLen, (int)u);
|
---|
| 546 | XMEMCPY(output, Ai, currentLen);
|
---|
| 547 | output += currentLen;
|
---|
| 548 | kLen -= currentLen;
|
---|
| 549 | mp_clear(&B1);
|
---|
| 550 | }
|
---|
| 551 |
|
---|
| 552 | if (dynamic) XFREE(buffer, 0, DYNAMIC_TYPE_KEY);
|
---|
| 553 |
|
---|
| 554 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 555 | XFREE(Ai, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 556 | XFREE(B, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 557 | #endif
|
---|
| 558 |
|
---|
| 559 | return ret;
|
---|
| 560 | }
|
---|
| 561 |
|
---|
| 562 | #undef PBKDF_DIGEST_SIZE
|
---|
| 563 |
|
---|
| 564 | #endif /* NO_PWDBASED */
|
---|
| 565 |
|
---|