[164] | 1 | /* tls.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 |
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| 23 | #ifdef HAVE_CONFIG_H
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| 24 | #include <config.h>
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| 25 | #endif
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| 26 |
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| 27 | #include <wolfssl/wolfcrypt/settings.h>
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| 28 |
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| 29 | #ifndef WOLFCRYPT_ONLY
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| 30 |
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| 31 | #include <wolfssl/wolfcrypt/wc_port.h>
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| 32 | #include <wolfssl/ssl.h>
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| 33 | #include <wolfssl/internal.h>
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| 34 | #include <wolfssl/error-ssl.h>
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| 35 | #include <wolfssl/wolfcrypt/hmac.h>
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| 36 | #ifdef NO_INLINE
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| 37 | #include <wolfssl/wolfcrypt/misc.h>
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| 38 | #else
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| 39 | #include <wolfcrypt/src/misc.c>
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| 40 | #endif
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| 41 |
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| 42 | #ifdef HAVE_NTRU
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| 43 | #include "libntruencrypt/ntru_crypto.h"
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| 44 | #include <wolfssl/wolfcrypt/random.h>
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| 45 | #endif
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| 46 | #ifdef HAVE_QSH
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| 47 | static int TLSX_AddQSHKey(QSHKey** list, QSHKey* key);
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| 48 | static byte* TLSX_QSHKeyFind_Pub(QSHKey* qsh, word16* pubLen, word16 name);
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| 49 | static int TLSX_CreateNtruKey(WOLFSSL* ssl, int type);
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| 50 | #endif
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| 51 |
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| 52 |
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| 53 | #ifndef NO_TLS
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| 54 |
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| 55 |
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| 56 | #ifdef min
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| 57 | #define WOLFSSL_HAVE_MIN
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| 58 | #endif
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| 59 | #ifndef WOLFSSL_HAVE_MIN
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| 60 | #define WOLFSSL_HAVE_MIN
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| 61 |
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| 62 | static INLINE word32 min(word32 a, word32 b)
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| 63 | {
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| 64 | return a > b ? b : a;
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| 65 | }
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| 66 |
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| 67 | #endif /* WOLFSSL_HAVE_MIN */
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| 68 |
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| 69 |
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| 70 | #ifdef WOLFSSL_SHA384
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| 71 | #define P_HASH_MAX_SIZE SHA384_DIGEST_SIZE
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| 72 | #else
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| 73 | #define P_HASH_MAX_SIZE SHA256_DIGEST_SIZE
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| 74 | #endif
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| 75 |
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| 76 | /* compute p_hash for MD5, SHA-1, SHA-256, or SHA-384 for TLSv1 PRF */
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| 77 | static int p_hash(byte* result, word32 resLen, const byte* secret,
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| 78 | word32 secLen, const byte* seed, word32 seedLen, int hash)
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| 79 | {
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| 80 | word32 len = P_HASH_MAX_SIZE;
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| 81 | word32 times;
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| 82 | word32 lastLen;
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| 83 | word32 lastTime;
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| 84 | word32 i;
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| 85 | word32 idx = 0;
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| 86 | int ret = 0;
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| 87 | #ifdef WOLFSSL_SMALL_STACK
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| 88 | byte* previous;
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| 89 | byte* current;
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| 90 | Hmac* hmac;
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| 91 | #else
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| 92 | byte previous[P_HASH_MAX_SIZE]; /* max size */
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| 93 | byte current[P_HASH_MAX_SIZE]; /* max size */
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| 94 | Hmac hmac[1];
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| 95 | #endif
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| 96 |
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| 97 | #ifdef WOLFSSL_SMALL_STACK
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| 98 | previous = (byte*)XMALLOC(P_HASH_MAX_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 99 | current = (byte*)XMALLOC(P_HASH_MAX_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 100 | hmac = (Hmac*)XMALLOC(sizeof(Hmac), NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 101 |
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| 102 | if (previous == NULL || current == NULL || hmac == NULL) {
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| 103 | if (previous) XFREE(previous, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 104 | if (current) XFREE(current, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 105 | if (hmac) XFREE(hmac, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 106 |
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| 107 | return MEMORY_E;
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| 108 | }
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| 109 | #endif
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| 110 |
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| 111 | switch (hash) {
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| 112 | #ifndef NO_MD5
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| 113 | case md5_mac:
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| 114 | hash = MD5;
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| 115 | len = MD5_DIGEST_SIZE;
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| 116 | break;
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| 117 | #endif
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| 118 |
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| 119 | #ifndef NO_SHA256
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| 120 | case sha256_mac:
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| 121 | hash = SHA256;
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| 122 | len = SHA256_DIGEST_SIZE;
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| 123 | break;
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| 124 | #endif
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| 125 |
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| 126 | #ifdef WOLFSSL_SHA384
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| 127 | case sha384_mac:
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| 128 | hash = SHA384;
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| 129 | len = SHA384_DIGEST_SIZE;
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| 130 | break;
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| 131 | #endif
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| 132 |
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| 133 | #ifndef NO_SHA
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| 134 | case sha_mac:
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| 135 | default:
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| 136 | hash = SHA;
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| 137 | len = SHA_DIGEST_SIZE;
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| 138 | break;
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| 139 | #endif
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| 140 | }
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| 141 |
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| 142 | times = resLen / len;
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| 143 | lastLen = resLen % len;
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| 144 |
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| 145 | if (lastLen)
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| 146 | times += 1;
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| 147 |
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| 148 | lastTime = times - 1;
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| 149 |
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| 150 | if ((ret = wc_HmacSetKey(hmac, hash, secret, secLen)) == 0) {
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| 151 | if ((ret = wc_HmacUpdate(hmac, seed, seedLen)) == 0) { /* A0 = seed */
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| 152 | if ((ret = wc_HmacFinal(hmac, previous)) == 0) { /* A1 */
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| 153 | for (i = 0; i < times; i++) {
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| 154 | ret = wc_HmacUpdate(hmac, previous, len);
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| 155 | if (ret != 0)
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| 156 | break;
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| 157 | ret = wc_HmacUpdate(hmac, seed, seedLen);
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| 158 | if (ret != 0)
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| 159 | break;
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| 160 | ret = wc_HmacFinal(hmac, current);
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| 161 | if (ret != 0)
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| 162 | break;
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| 163 |
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| 164 | if ((i == lastTime) && lastLen)
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| 165 | XMEMCPY(&result[idx], current,
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| 166 | min(lastLen, P_HASH_MAX_SIZE));
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| 167 | else {
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| 168 | XMEMCPY(&result[idx], current, len);
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| 169 | idx += len;
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| 170 | ret = wc_HmacUpdate(hmac, previous, len);
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| 171 | if (ret != 0)
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| 172 | break;
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| 173 | ret = wc_HmacFinal(hmac, previous);
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| 174 | if (ret != 0)
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| 175 | break;
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| 176 | }
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| 177 | }
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| 178 | }
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| 179 | }
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| 180 | }
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| 181 |
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| 182 | ForceZero(previous, P_HASH_MAX_SIZE);
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| 183 | ForceZero(current, P_HASH_MAX_SIZE);
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| 184 | ForceZero(hmac, sizeof(Hmac));
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| 185 |
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| 186 | #ifdef WOLFSSL_SMALL_STACK
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| 187 | XFREE(previous, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 188 | XFREE(current, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 189 | XFREE(hmac, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 190 | #endif
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| 191 |
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| 192 | return ret;
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| 193 | }
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| 194 |
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| 195 | #undef P_HASH_MAX_SIZE
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| 196 |
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| 197 |
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| 198 | #ifndef NO_OLD_TLS
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| 199 |
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| 200 | /* calculate XOR for TLSv1 PRF */
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| 201 | static INLINE void get_xor(byte *digest, word32 digLen, byte* md5, byte* sha)
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| 202 | {
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| 203 | word32 i;
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| 204 |
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| 205 | for (i = 0; i < digLen; i++)
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| 206 | digest[i] = md5[i] ^ sha[i];
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| 207 | }
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| 208 |
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| 209 |
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| 210 | /* compute TLSv1 PRF (pseudo random function using HMAC) */
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| 211 | static int doPRF(byte* digest, word32 digLen, const byte* secret,word32 secLen,
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| 212 | const byte* label, word32 labLen, const byte* seed,
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| 213 | word32 seedLen)
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| 214 | {
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| 215 | int ret = 0;
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| 216 | word32 half = (secLen + 1) / 2;
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| 217 |
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| 218 | #ifdef WOLFSSL_SMALL_STACK
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| 219 | byte* md5_half;
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| 220 | byte* sha_half;
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| 221 | byte* labelSeed;
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| 222 | byte* md5_result;
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| 223 | byte* sha_result;
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| 224 | #else
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| 225 | byte md5_half[MAX_PRF_HALF]; /* half is real size */
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| 226 | byte sha_half[MAX_PRF_HALF]; /* half is real size */
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| 227 | byte labelSeed[MAX_PRF_LABSEED]; /* labLen + seedLen is real size */
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| 228 | byte md5_result[MAX_PRF_DIG]; /* digLen is real size */
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| 229 | byte sha_result[MAX_PRF_DIG]; /* digLen is real size */
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| 230 | #endif
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| 231 |
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| 232 | if (half > MAX_PRF_HALF)
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| 233 | return BUFFER_E;
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| 234 | if (labLen + seedLen > MAX_PRF_LABSEED)
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| 235 | return BUFFER_E;
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| 236 | if (digLen > MAX_PRF_DIG)
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| 237 | return BUFFER_E;
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| 238 |
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| 239 | #ifdef WOLFSSL_SMALL_STACK
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| 240 | md5_half = (byte*)XMALLOC(MAX_PRF_HALF, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 241 | sha_half = (byte*)XMALLOC(MAX_PRF_HALF, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 242 | labelSeed = (byte*)XMALLOC(MAX_PRF_LABSEED, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 243 | md5_result = (byte*)XMALLOC(MAX_PRF_DIG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 244 | sha_result = (byte*)XMALLOC(MAX_PRF_DIG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 245 |
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| 246 | if (md5_half == NULL || sha_half == NULL || labelSeed == NULL ||
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| 247 | md5_result == NULL || sha_result == NULL) {
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| 248 | if (md5_half) XFREE(md5_half, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 249 | if (sha_half) XFREE(sha_half, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 250 | if (labelSeed) XFREE(labelSeed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 251 | if (md5_result) XFREE(md5_result, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 252 | if (sha_result) XFREE(sha_result, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 253 |
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| 254 | return MEMORY_E;
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| 255 | }
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| 256 | #endif
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| 257 |
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| 258 | XMEMSET(md5_result, 0, digLen);
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| 259 | XMEMSET(sha_result, 0, digLen);
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| 260 |
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| 261 | XMEMCPY(md5_half, secret, half);
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| 262 | XMEMCPY(sha_half, secret + half - secLen % 2, half);
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| 263 |
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| 264 | XMEMCPY(labelSeed, label, labLen);
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| 265 | XMEMCPY(labelSeed + labLen, seed, seedLen);
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| 266 |
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| 267 | if ((ret = p_hash(md5_result, digLen, md5_half, half, labelSeed,
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| 268 | labLen + seedLen, md5_mac)) == 0) {
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| 269 | if ((ret = p_hash(sha_result, digLen, sha_half, half, labelSeed,
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| 270 | labLen + seedLen, sha_mac)) == 0) {
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| 271 | get_xor(digest, digLen, md5_result, sha_result);
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| 272 | }
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| 273 | }
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| 274 |
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| 275 | #ifdef WOLFSSL_SMALL_STACK
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| 276 | XFREE(md5_half, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 277 | XFREE(sha_half, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 278 | XFREE(labelSeed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 279 | XFREE(md5_result, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 280 | XFREE(sha_result, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 281 | #endif
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| 282 |
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| 283 | return ret;
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| 284 | }
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| 285 |
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| 286 | #endif
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| 287 |
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| 288 |
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| 289 | /* Wrapper to call straight thru to p_hash in TSL 1.2 cases to remove stack
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| 290 | use */
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| 291 | static int PRF(byte* digest, word32 digLen, const byte* secret, word32 secLen,
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| 292 | const byte* label, word32 labLen, const byte* seed, word32 seedLen,
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| 293 | int useAtLeastSha256, int hash_type)
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| 294 | {
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| 295 | int ret = 0;
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| 296 |
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| 297 | if (useAtLeastSha256) {
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| 298 | #ifdef WOLFSSL_SMALL_STACK
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| 299 | byte* labelSeed;
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| 300 | #else
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| 301 | byte labelSeed[MAX_PRF_LABSEED]; /* labLen + seedLen is real size */
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| 302 | #endif
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| 303 |
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| 304 | if (labLen + seedLen > MAX_PRF_LABSEED)
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| 305 | return BUFFER_E;
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| 306 |
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| 307 | #ifdef WOLFSSL_SMALL_STACK
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| 308 | labelSeed = (byte*)XMALLOC(MAX_PRF_LABSEED, NULL,
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| 309 | DYNAMIC_TYPE_TMP_BUFFER);
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| 310 | if (labelSeed == NULL)
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| 311 | return MEMORY_E;
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| 312 | #endif
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| 313 |
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| 314 | XMEMCPY(labelSeed, label, labLen);
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| 315 | XMEMCPY(labelSeed + labLen, seed, seedLen);
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| 316 |
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| 317 | /* If a cipher suite wants an algorithm better than sha256, it
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| 318 | * should use better. */
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| 319 | if (hash_type < sha256_mac || hash_type == blake2b_mac)
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| 320 | hash_type = sha256_mac;
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| 321 | ret = p_hash(digest, digLen, secret, secLen, labelSeed,
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| 322 | labLen + seedLen, hash_type);
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| 323 |
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| 324 | #ifdef WOLFSSL_SMALL_STACK
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| 325 | XFREE(labelSeed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
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| 326 | #endif
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| 327 | }
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| 328 | #ifndef NO_OLD_TLS
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| 329 | else {
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| 330 | ret = doPRF(digest, digLen, secret, secLen, label, labLen, seed,
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| 331 | seedLen);
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| 332 | }
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| 333 | #endif
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| 334 |
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| 335 | return ret;
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| 336 | }
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| 337 |
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| 338 |
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| 339 | #ifdef WOLFSSL_SHA384
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| 340 | #define HSHASH_SZ SHA384_DIGEST_SIZE
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| 341 | #else
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| 342 | #define HSHASH_SZ FINISHED_SZ
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| 343 | #endif
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| 344 |
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| 345 |
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| 346 | int BuildTlsFinished(WOLFSSL* ssl, Hashes* hashes, const byte* sender)
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| 347 | {
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| 348 | const byte* side;
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| 349 | byte handshake_hash[HSHASH_SZ];
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| 350 | word32 hashSz = FINISHED_SZ;
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| 351 |
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| 352 | #ifndef NO_OLD_TLS
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| 353 | wc_Md5GetHash(&ssl->hsHashes->hashMd5, handshake_hash);
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| 354 | wc_ShaGetHash(&ssl->hsHashes->hashSha, &handshake_hash[MD5_DIGEST_SIZE]);
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| 355 | #endif
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| 356 |
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| 357 | if (IsAtLeastTLSv1_2(ssl)) {
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| 358 | #ifndef NO_SHA256
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| 359 | if (ssl->specs.mac_algorithm <= sha256_mac || ssl->specs.mac_algorithm == blake2b_mac) {
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| 360 | int ret = wc_Sha256GetHash(&ssl->hsHashes->hashSha256,handshake_hash);
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| 361 |
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| 362 | if (ret != 0)
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| 363 | return ret;
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| 364 |
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| 365 | hashSz = SHA256_DIGEST_SIZE;
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| 366 | }
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| 367 | #endif
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| 368 | #ifdef WOLFSSL_SHA384
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| 369 | if (ssl->specs.mac_algorithm == sha384_mac) {
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| 370 | int ret = wc_Sha384Final(&ssl->hsHashes->hashSha384,handshake_hash);
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| 371 |
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| 372 | if (ret != 0)
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| 373 | return ret;
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| 374 |
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| 375 | hashSz = SHA384_DIGEST_SIZE;
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| 376 | }
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| 377 | #endif
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| 378 | }
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| 379 |
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| 380 | if ( XSTRNCMP((const char*)sender, (const char*)client, SIZEOF_SENDER) == 0)
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| 381 | side = tls_client;
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| 382 | else
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| 383 | side = tls_server;
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| 384 |
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| 385 | return PRF((byte*)hashes, TLS_FINISHED_SZ, ssl->arrays->masterSecret,
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| 386 | SECRET_LEN, side, FINISHED_LABEL_SZ, handshake_hash, hashSz,
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| 387 | IsAtLeastTLSv1_2(ssl), ssl->specs.mac_algorithm);
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| 388 | }
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| 389 |
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| 390 |
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| 391 | #ifndef NO_OLD_TLS
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| 392 |
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| 393 | ProtocolVersion MakeTLSv1(void)
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| 394 | {
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| 395 | ProtocolVersion pv;
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| 396 | pv.major = SSLv3_MAJOR;
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| 397 | pv.minor = TLSv1_MINOR;
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| 398 |
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| 399 | return pv;
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| 400 | }
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| 401 |
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| 402 |
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| 403 | ProtocolVersion MakeTLSv1_1(void)
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| 404 | {
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| 405 | ProtocolVersion pv;
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| 406 | pv.major = SSLv3_MAJOR;
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| 407 | pv.minor = TLSv1_1_MINOR;
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| 408 |
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| 409 | return pv;
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| 410 | }
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| 411 |
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| 412 | #endif
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| 413 |
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| 414 |
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| 415 | ProtocolVersion MakeTLSv1_2(void)
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| 416 | {
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| 417 | ProtocolVersion pv;
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| 418 | pv.major = SSLv3_MAJOR;
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| 419 | pv.minor = TLSv1_2_MINOR;
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| 420 |
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| 421 | return pv;
|
---|
| 422 | }
|
---|
| 423 |
|
---|
| 424 |
|
---|
| 425 | static const byte master_label[MASTER_LABEL_SZ + 1] = "master secret";
|
---|
| 426 | static const byte key_label [KEY_LABEL_SZ + 1] = "key expansion";
|
---|
| 427 |
|
---|
| 428 |
|
---|
| 429 | /* External facing wrapper so user can call as well, 0 on success */
|
---|
| 430 | int wolfSSL_DeriveTlsKeys(byte* key_data, word32 keyLen,
|
---|
| 431 | const byte* ms, word32 msLen,
|
---|
| 432 | const byte* sr, const byte* cr,
|
---|
| 433 | int tls1_2, int hash_type)
|
---|
| 434 | {
|
---|
| 435 | byte seed[SEED_LEN];
|
---|
| 436 |
|
---|
| 437 | XMEMCPY(seed, sr, RAN_LEN);
|
---|
| 438 | XMEMCPY(seed + RAN_LEN, cr, RAN_LEN);
|
---|
| 439 |
|
---|
| 440 | return PRF(key_data, keyLen, ms, msLen, key_label, KEY_LABEL_SZ,
|
---|
| 441 | seed, SEED_LEN, tls1_2, hash_type);
|
---|
| 442 | }
|
---|
| 443 |
|
---|
| 444 |
|
---|
| 445 | int DeriveTlsKeys(WOLFSSL* ssl)
|
---|
| 446 | {
|
---|
| 447 | int ret;
|
---|
| 448 | int length = 2 * ssl->specs.hash_size +
|
---|
| 449 | 2 * ssl->specs.key_size +
|
---|
| 450 | 2 * ssl->specs.iv_size;
|
---|
| 451 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 452 | byte* key_data;
|
---|
| 453 | #else
|
---|
| 454 | byte key_data[MAX_PRF_DIG];
|
---|
| 455 | #endif
|
---|
| 456 |
|
---|
| 457 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 458 | key_data = (byte*)XMALLOC(MAX_PRF_DIG, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 459 | if (key_data == NULL) {
|
---|
| 460 | return MEMORY_E;
|
---|
| 461 | }
|
---|
| 462 | #endif
|
---|
| 463 |
|
---|
| 464 | ret = wolfSSL_DeriveTlsKeys(key_data, length,
|
---|
| 465 | ssl->arrays->masterSecret, SECRET_LEN,
|
---|
| 466 | ssl->arrays->serverRandom, ssl->arrays->clientRandom,
|
---|
| 467 | IsAtLeastTLSv1_2(ssl), ssl->specs.mac_algorithm);
|
---|
| 468 | if (ret == 0)
|
---|
| 469 | ret = StoreKeys(ssl, key_data);
|
---|
| 470 |
|
---|
| 471 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 472 | XFREE(key_data, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 473 | #endif
|
---|
| 474 |
|
---|
| 475 | return ret;
|
---|
| 476 | }
|
---|
| 477 |
|
---|
| 478 |
|
---|
| 479 | /* External facing wrapper so user can call as well, 0 on success */
|
---|
| 480 | int wolfSSL_MakeTlsMasterSecret(byte* ms, word32 msLen,
|
---|
| 481 | const byte* pms, word32 pmsLen,
|
---|
| 482 | const byte* cr, const byte* sr,
|
---|
| 483 | int tls1_2, int hash_type)
|
---|
| 484 | {
|
---|
| 485 | byte seed[SEED_LEN];
|
---|
| 486 |
|
---|
| 487 | XMEMCPY(seed, cr, RAN_LEN);
|
---|
| 488 | XMEMCPY(seed + RAN_LEN, sr, RAN_LEN);
|
---|
| 489 |
|
---|
| 490 | return PRF(ms, msLen, pms, pmsLen, master_label, MASTER_LABEL_SZ,
|
---|
| 491 | seed, SEED_LEN, tls1_2, hash_type);
|
---|
| 492 | }
|
---|
| 493 |
|
---|
| 494 |
|
---|
| 495 | int MakeTlsMasterSecret(WOLFSSL* ssl)
|
---|
| 496 | {
|
---|
| 497 | int ret;
|
---|
| 498 |
|
---|
| 499 | ret = wolfSSL_MakeTlsMasterSecret(ssl->arrays->masterSecret, SECRET_LEN,
|
---|
| 500 | ssl->arrays->preMasterSecret, ssl->arrays->preMasterSz,
|
---|
| 501 | ssl->arrays->clientRandom, ssl->arrays->serverRandom,
|
---|
| 502 | IsAtLeastTLSv1_2(ssl), ssl->specs.mac_algorithm);
|
---|
| 503 |
|
---|
| 504 | if (ret == 0) {
|
---|
| 505 | #ifdef SHOW_SECRETS
|
---|
| 506 | int i;
|
---|
| 507 |
|
---|
| 508 | printf("master secret: ");
|
---|
| 509 | for (i = 0; i < SECRET_LEN; i++)
|
---|
| 510 | printf("%02x", ssl->arrays->masterSecret[i]);
|
---|
| 511 | printf("\n");
|
---|
| 512 | #endif
|
---|
| 513 |
|
---|
| 514 | ret = DeriveTlsKeys(ssl);
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | return ret;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 |
|
---|
| 521 | /* Used by EAP-TLS and EAP-TTLS to derive keying material from
|
---|
| 522 | * the master_secret. */
|
---|
| 523 | int wolfSSL_make_eap_keys(WOLFSSL* ssl, void* msk, unsigned int len,
|
---|
| 524 | const char* label)
|
---|
| 525 | {
|
---|
| 526 | int ret;
|
---|
| 527 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 528 | byte* seed;
|
---|
| 529 | #else
|
---|
| 530 | byte seed[SEED_LEN];
|
---|
| 531 | #endif
|
---|
| 532 |
|
---|
| 533 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 534 | seed = (byte*)XMALLOC(SEED_LEN, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 535 | if (seed == NULL)
|
---|
| 536 | return MEMORY_E;
|
---|
| 537 | #endif
|
---|
| 538 |
|
---|
| 539 | /*
|
---|
| 540 | * As per RFC-5281, the order of the client and server randoms is reversed
|
---|
| 541 | * from that used by the TLS protocol to derive keys.
|
---|
| 542 | */
|
---|
| 543 | XMEMCPY(seed, ssl->arrays->clientRandom, RAN_LEN);
|
---|
| 544 | XMEMCPY(seed + RAN_LEN, ssl->arrays->serverRandom, RAN_LEN);
|
---|
| 545 |
|
---|
| 546 | ret = PRF((byte*)msk, len, ssl->arrays->masterSecret, SECRET_LEN,
|
---|
| 547 | (const byte *)label, (word32)strlen(label), seed, SEED_LEN,
|
---|
| 548 | IsAtLeastTLSv1_2(ssl), ssl->specs.mac_algorithm);
|
---|
| 549 |
|
---|
| 550 | #ifdef WOLFSSL_SMALL_STACK
|
---|
| 551 | XFREE(seed, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 552 | #endif
|
---|
| 553 |
|
---|
| 554 | return ret;
|
---|
| 555 | }
|
---|
| 556 |
|
---|
| 557 |
|
---|
| 558 | /*** next for static INLINE s copied internal.c ***/
|
---|
| 559 |
|
---|
| 560 | /* convert 16 bit integer to opaque */
|
---|
| 561 | static INLINE void c16toa(word16 u16, byte* c)
|
---|
| 562 | {
|
---|
| 563 | c[0] = (u16 >> 8) & 0xff;
|
---|
| 564 | c[1] = u16 & 0xff;
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | #ifdef HAVE_TLS_EXTENSIONS
|
---|
| 568 | /* convert opaque to 16 bit integer */
|
---|
| 569 | static INLINE void ato16(const byte* c, word16* u16)
|
---|
| 570 | {
|
---|
| 571 | *u16 = (c[0] << 8) | (c[1]);
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | #if defined(HAVE_SNI) && !defined(NO_WOLFSSL_SERVER)
|
---|
| 575 | /* convert a 24 bit integer into a 32 bit one */
|
---|
| 576 | static INLINE void c24to32(const word24 u24, word32* u32)
|
---|
| 577 | {
|
---|
| 578 | *u32 = (u24[0] << 16) | (u24[1] << 8) | u24[2];
|
---|
| 579 | }
|
---|
| 580 | #endif
|
---|
| 581 | #endif
|
---|
| 582 |
|
---|
| 583 | /* convert 32 bit integer to opaque */
|
---|
| 584 | static INLINE void c32toa(word32 u32, byte* c)
|
---|
| 585 | {
|
---|
| 586 | c[0] = (u32 >> 24) & 0xff;
|
---|
| 587 | c[1] = (u32 >> 16) & 0xff;
|
---|
| 588 | c[2] = (u32 >> 8) & 0xff;
|
---|
| 589 | c[3] = u32 & 0xff;
|
---|
| 590 | }
|
---|
| 591 |
|
---|
| 592 |
|
---|
| 593 | static INLINE word32 GetSEQIncrement(WOLFSSL* ssl, int verify)
|
---|
| 594 | {
|
---|
| 595 | #ifdef WOLFSSL_DTLS
|
---|
| 596 | if (ssl->options.dtls) {
|
---|
| 597 | if (verify)
|
---|
| 598 | return ssl->keys.dtls_state.curSeq; /* explicit from peer */
|
---|
| 599 | else
|
---|
| 600 | return ssl->keys.dtls_sequence_number - 1; /* already incremented */
|
---|
| 601 | }
|
---|
| 602 | #endif
|
---|
| 603 | if (verify)
|
---|
| 604 | return ssl->keys.peer_sequence_number++;
|
---|
| 605 | else
|
---|
| 606 | return ssl->keys.sequence_number++;
|
---|
| 607 | }
|
---|
| 608 |
|
---|
| 609 |
|
---|
| 610 | #ifdef WOLFSSL_DTLS
|
---|
| 611 |
|
---|
| 612 | static INLINE word32 GetEpoch(WOLFSSL* ssl, int verify)
|
---|
| 613 | {
|
---|
| 614 | if (verify)
|
---|
| 615 | return ssl->keys.dtls_state.curEpoch;
|
---|
| 616 | else
|
---|
| 617 | return ssl->keys.dtls_epoch;
|
---|
| 618 | }
|
---|
| 619 |
|
---|
| 620 | #endif /* WOLFSSL_DTLS */
|
---|
| 621 |
|
---|
| 622 |
|
---|
| 623 | /*** end copy ***/
|
---|
| 624 |
|
---|
| 625 |
|
---|
| 626 | /* return HMAC digest type in wolfSSL format */
|
---|
| 627 | int wolfSSL_GetHmacType(WOLFSSL* ssl)
|
---|
| 628 | {
|
---|
| 629 | if (ssl == NULL)
|
---|
| 630 | return BAD_FUNC_ARG;
|
---|
| 631 |
|
---|
| 632 | switch (ssl->specs.mac_algorithm) {
|
---|
| 633 | #ifndef NO_MD5
|
---|
| 634 | case md5_mac:
|
---|
| 635 | {
|
---|
| 636 | return MD5;
|
---|
| 637 | }
|
---|
| 638 | #endif
|
---|
| 639 | #ifndef NO_SHA256
|
---|
| 640 | case sha256_mac:
|
---|
| 641 | {
|
---|
| 642 | return SHA256;
|
---|
| 643 | }
|
---|
| 644 | #endif
|
---|
| 645 | #ifdef WOLFSSL_SHA384
|
---|
| 646 | case sha384_mac:
|
---|
| 647 | {
|
---|
| 648 | return SHA384;
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | #endif
|
---|
| 652 | #ifndef NO_SHA
|
---|
| 653 | case sha_mac:
|
---|
| 654 | {
|
---|
| 655 | return SHA;
|
---|
| 656 | }
|
---|
| 657 | #endif
|
---|
| 658 | #ifdef HAVE_BLAKE2
|
---|
| 659 | case blake2b_mac:
|
---|
| 660 | {
|
---|
| 661 | return BLAKE2B_ID;
|
---|
| 662 | }
|
---|
| 663 | #endif
|
---|
| 664 | default:
|
---|
| 665 | {
|
---|
| 666 | return SSL_FATAL_ERROR;
|
---|
| 667 | }
|
---|
| 668 | }
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 |
|
---|
| 672 | int wolfSSL_SetTlsHmacInner(WOLFSSL* ssl, byte* inner, word32 sz, int content,
|
---|
| 673 | int verify)
|
---|
| 674 | {
|
---|
| 675 | if (ssl == NULL || inner == NULL)
|
---|
| 676 | return BAD_FUNC_ARG;
|
---|
| 677 |
|
---|
| 678 | XMEMSET(inner, 0, WOLFSSL_TLS_HMAC_INNER_SZ);
|
---|
| 679 |
|
---|
| 680 | #ifdef WOLFSSL_DTLS
|
---|
| 681 | if (ssl->options.dtls)
|
---|
| 682 | c16toa((word16)GetEpoch(ssl, verify), inner);
|
---|
| 683 | #endif
|
---|
| 684 | c32toa(GetSEQIncrement(ssl, verify), &inner[sizeof(word32)]);
|
---|
| 685 | inner[SEQ_SZ] = (byte)content;
|
---|
| 686 | inner[SEQ_SZ + ENUM_LEN] = ssl->version.major;
|
---|
| 687 | inner[SEQ_SZ + ENUM_LEN + ENUM_LEN] = ssl->version.minor;
|
---|
| 688 | c16toa((word16)sz, inner + SEQ_SZ + ENUM_LEN + VERSION_SZ);
|
---|
| 689 |
|
---|
| 690 | return 0;
|
---|
| 691 | }
|
---|
| 692 |
|
---|
| 693 |
|
---|
| 694 | /* TLS type HMAC */
|
---|
| 695 | int TLS_hmac(WOLFSSL* ssl, byte* digest, const byte* in, word32 sz,
|
---|
| 696 | int content, int verify)
|
---|
| 697 | {
|
---|
| 698 | Hmac hmac;
|
---|
| 699 | int ret;
|
---|
| 700 | byte myInner[WOLFSSL_TLS_HMAC_INNER_SZ];
|
---|
| 701 |
|
---|
| 702 | if (ssl == NULL)
|
---|
| 703 | return BAD_FUNC_ARG;
|
---|
| 704 |
|
---|
| 705 | #ifdef HAVE_FUZZER
|
---|
| 706 | if (ssl->fuzzerCb)
|
---|
| 707 | ssl->fuzzerCb(ssl, in, sz, FUZZ_HMAC, ssl->fuzzerCtx);
|
---|
| 708 | #endif
|
---|
| 709 |
|
---|
| 710 | wolfSSL_SetTlsHmacInner(ssl, myInner, sz, content, verify);
|
---|
| 711 |
|
---|
| 712 | ret = wc_HmacSetKey(&hmac, wolfSSL_GetHmacType(ssl),
|
---|
| 713 | wolfSSL_GetMacSecret(ssl, verify), ssl->specs.hash_size);
|
---|
| 714 | if (ret != 0)
|
---|
| 715 | return ret;
|
---|
| 716 | ret = wc_HmacUpdate(&hmac, myInner, sizeof(myInner));
|
---|
| 717 | if (ret != 0)
|
---|
| 718 | return ret;
|
---|
| 719 | ret = wc_HmacUpdate(&hmac, in, sz); /* content */
|
---|
| 720 | if (ret != 0)
|
---|
| 721 | return ret;
|
---|
| 722 | ret = wc_HmacFinal(&hmac, digest);
|
---|
| 723 | if (ret != 0)
|
---|
| 724 | return ret;
|
---|
| 725 |
|
---|
| 726 | return 0;
|
---|
| 727 | }
|
---|
| 728 |
|
---|
| 729 | #ifdef HAVE_TLS_EXTENSIONS
|
---|
| 730 |
|
---|
| 731 | /**
|
---|
| 732 | * The TLSX semaphore is used to calculate the size of the extensions to be sent
|
---|
| 733 | * from one peer to another.
|
---|
| 734 | */
|
---|
| 735 |
|
---|
| 736 | /** Supports up to 64 flags. Increase as needed. */
|
---|
| 737 | #define SEMAPHORE_SIZE 8
|
---|
| 738 |
|
---|
| 739 | /**
|
---|
| 740 | * Converts the extension type (id) to an index in the semaphore.
|
---|
| 741 | *
|
---|
| 742 | * Oficial reference for TLS extension types:
|
---|
| 743 | * http://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xml
|
---|
| 744 | *
|
---|
| 745 | * Motivation:
|
---|
| 746 | * Previously, we used the extension type itself as the index of that
|
---|
| 747 | * extension in the semaphore as the extension types were declared
|
---|
| 748 | * sequentially, but maintain a semaphore as big as the number of available
|
---|
| 749 | * extensions is no longer an option since the release of renegotiation_info.
|
---|
| 750 | *
|
---|
| 751 | * How to update:
|
---|
| 752 | * Assign extension types that extrapolate the number of available semaphores
|
---|
| 753 | * to the first available index going backwards in the semaphore array.
|
---|
| 754 | * When adding a new extension type that don't extrapolate the number of
|
---|
| 755 | * available semaphores, check for a possible collision with with a
|
---|
| 756 | * 'remapped' extension type.
|
---|
| 757 | */
|
---|
| 758 | static INLINE word16 TLSX_ToSemaphore(word16 type)
|
---|
| 759 | {
|
---|
| 760 | switch (type) {
|
---|
| 761 |
|
---|
| 762 | case SECURE_RENEGOTIATION: /* 0xFF01 */
|
---|
| 763 | return 63;
|
---|
| 764 |
|
---|
| 765 | default:
|
---|
| 766 | if (type > 62) {
|
---|
| 767 | /* This message SHOULD only happens during the adding of
|
---|
| 768 | new TLS extensions in which its IANA number overflows
|
---|
| 769 | the current semaphore's range, or if its number already
|
---|
| 770 | is assigned to be used by another extension.
|
---|
| 771 | Use this check value for the new extension and decrement
|
---|
| 772 | the check value by one. */
|
---|
| 773 | WOLFSSL_MSG("### TLSX semaphore colision or overflow detected!");
|
---|
| 774 | }
|
---|
| 775 | }
|
---|
| 776 |
|
---|
| 777 | return type;
|
---|
| 778 | }
|
---|
| 779 |
|
---|
| 780 | /** Checks if a specific light (tls extension) is not set in the semaphore. */
|
---|
| 781 | #define IS_OFF(semaphore, light) \
|
---|
| 782 | ((semaphore)[(light) / 8] ^ (byte) (0x01 << ((light) % 8)))
|
---|
| 783 |
|
---|
| 784 | /** Turn on a specific light (tls extension) in the semaphore. */
|
---|
| 785 | #define TURN_ON(semaphore, light) \
|
---|
| 786 | ((semaphore)[(light) / 8] |= (byte) (0x01 << ((light) % 8)))
|
---|
| 787 |
|
---|
| 788 | /** Creates a new extension. */
|
---|
| 789 | static TLSX* TLSX_New(TLSX_Type type, void* data)
|
---|
| 790 | {
|
---|
| 791 | TLSX* extension = (TLSX*)XMALLOC(sizeof(TLSX), 0, DYNAMIC_TYPE_TLSX);
|
---|
| 792 |
|
---|
| 793 | if (extension) {
|
---|
| 794 | extension->type = type;
|
---|
| 795 | extension->data = data;
|
---|
| 796 | extension->resp = 0;
|
---|
| 797 | extension->next = NULL;
|
---|
| 798 | }
|
---|
| 799 |
|
---|
| 800 | return extension;
|
---|
| 801 | }
|
---|
| 802 |
|
---|
| 803 | /**
|
---|
| 804 | * Creates a new extension and pushes it to the provided list.
|
---|
| 805 | * Checks for duplicate extensions, keeps the newest.
|
---|
| 806 | */
|
---|
| 807 | static int TLSX_Push(TLSX** list, TLSX_Type type, void* data)
|
---|
| 808 | {
|
---|
| 809 | TLSX* extension = TLSX_New(type, data);
|
---|
| 810 |
|
---|
| 811 | if (extension == NULL)
|
---|
| 812 | return MEMORY_E;
|
---|
| 813 |
|
---|
| 814 | /* pushes the new extension on the list. */
|
---|
| 815 | extension->next = *list;
|
---|
| 816 | *list = extension;
|
---|
| 817 |
|
---|
| 818 | /* remove duplicate extensions, there should be only one of each type. */
|
---|
| 819 | do {
|
---|
| 820 | if (extension->next && extension->next->type == type) {
|
---|
| 821 | TLSX *next = extension->next;
|
---|
| 822 |
|
---|
| 823 | extension->next = next->next;
|
---|
| 824 | next->next = NULL;
|
---|
| 825 |
|
---|
| 826 | TLSX_FreeAll(next);
|
---|
| 827 |
|
---|
| 828 | /* there is no way to occur more than */
|
---|
| 829 | /* two extensions of the same type. */
|
---|
| 830 | break;
|
---|
| 831 | }
|
---|
| 832 | } while ((extension = extension->next));
|
---|
| 833 |
|
---|
| 834 | return 0;
|
---|
| 835 | }
|
---|
| 836 |
|
---|
| 837 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 838 |
|
---|
| 839 | /** Mark an extension to be sent back to the client. */
|
---|
| 840 | void TLSX_SetResponse(WOLFSSL* ssl, TLSX_Type type);
|
---|
| 841 |
|
---|
| 842 | void TLSX_SetResponse(WOLFSSL* ssl, TLSX_Type type)
|
---|
| 843 | {
|
---|
| 844 | TLSX *ext = TLSX_Find(ssl->extensions, type);
|
---|
| 845 |
|
---|
| 846 | if (ext)
|
---|
| 847 | ext->resp = 1;
|
---|
| 848 | }
|
---|
| 849 |
|
---|
| 850 | #endif
|
---|
| 851 |
|
---|
| 852 |
|
---|
| 853 | #ifdef HAVE_ALPN
|
---|
| 854 | /** Creates a new ALPN object, providing protocol name to use. */
|
---|
| 855 | static ALPN* TLSX_ALPN_New(char *protocol_name, word16 protocol_nameSz)
|
---|
| 856 | {
|
---|
| 857 | ALPN *alpn;
|
---|
| 858 |
|
---|
| 859 | WOLFSSL_ENTER("TLSX_ALPN_New");
|
---|
| 860 |
|
---|
| 861 | if (protocol_name == NULL ||
|
---|
| 862 | protocol_nameSz > WOLFSSL_MAX_ALPN_PROTO_NAME_LEN) {
|
---|
| 863 | WOLFSSL_MSG("Invalid arguments");
|
---|
| 864 | return NULL;
|
---|
| 865 | }
|
---|
| 866 |
|
---|
| 867 | alpn = (ALPN*)XMALLOC(sizeof(ALPN), 0, DYNAMIC_TYPE_TLSX);
|
---|
| 868 | if (alpn == NULL) {
|
---|
| 869 | WOLFSSL_MSG("Memory failure");
|
---|
| 870 | return NULL;
|
---|
| 871 | }
|
---|
| 872 |
|
---|
| 873 | alpn->next = NULL;
|
---|
| 874 | alpn->negociated = 0;
|
---|
| 875 | alpn->options = 0;
|
---|
| 876 |
|
---|
| 877 | alpn->protocol_name = XMALLOC(protocol_nameSz + 1, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 878 | if (alpn->protocol_name == NULL) {
|
---|
| 879 | WOLFSSL_MSG("Memory failure");
|
---|
| 880 | XFREE(alpn, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 881 | return NULL;
|
---|
| 882 | }
|
---|
| 883 |
|
---|
| 884 | XMEMCPY(alpn->protocol_name, protocol_name, protocol_nameSz);
|
---|
| 885 | alpn->protocol_name[protocol_nameSz] = 0;
|
---|
| 886 |
|
---|
| 887 | return alpn;
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | /** Releases an ALPN object. */
|
---|
| 891 | static void TLSX_ALPN_Free(ALPN *alpn)
|
---|
| 892 | {
|
---|
| 893 | if (alpn == NULL)
|
---|
| 894 | return;
|
---|
| 895 |
|
---|
| 896 | XFREE(alpn->protocol_name, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 897 | XFREE(alpn, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 898 | }
|
---|
| 899 |
|
---|
| 900 | /** Releases all ALPN objects in the provided list. */
|
---|
| 901 | static void TLSX_ALPN_FreeAll(ALPN *list)
|
---|
| 902 | {
|
---|
| 903 | ALPN* alpn;
|
---|
| 904 |
|
---|
| 905 | while ((alpn = list)) {
|
---|
| 906 | list = alpn->next;
|
---|
| 907 | TLSX_ALPN_Free(alpn);
|
---|
| 908 | }
|
---|
| 909 | }
|
---|
| 910 |
|
---|
| 911 | /** Tells the buffered size of the ALPN objects in a list. */
|
---|
| 912 | static word16 TLSX_ALPN_GetSize(ALPN *list)
|
---|
| 913 | {
|
---|
| 914 | ALPN* alpn;
|
---|
| 915 | word16 length = OPAQUE16_LEN; /* list length */
|
---|
| 916 |
|
---|
| 917 | while ((alpn = list)) {
|
---|
| 918 | list = alpn->next;
|
---|
| 919 |
|
---|
| 920 | length++; /* protocol name length is on one byte */
|
---|
| 921 | length += (word16)XSTRLEN(alpn->protocol_name);
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 | return length;
|
---|
| 925 | }
|
---|
| 926 |
|
---|
| 927 | /** Writes the ALPN objects of a list in a buffer. */
|
---|
| 928 | static word16 TLSX_ALPN_Write(ALPN *list, byte *output)
|
---|
| 929 | {
|
---|
| 930 | ALPN* alpn;
|
---|
| 931 | word16 length = 0;
|
---|
| 932 | word16 offset = OPAQUE16_LEN; /* list length offset */
|
---|
| 933 |
|
---|
| 934 | while ((alpn = list)) {
|
---|
| 935 | list = alpn->next;
|
---|
| 936 |
|
---|
| 937 | length = (word16)XSTRLEN(alpn->protocol_name);
|
---|
| 938 |
|
---|
| 939 | /* protocol name length */
|
---|
| 940 | output[offset++] = (byte)length;
|
---|
| 941 |
|
---|
| 942 | /* protocol name value */
|
---|
| 943 | XMEMCPY(output + offset, alpn->protocol_name, length);
|
---|
| 944 |
|
---|
| 945 | offset += length;
|
---|
| 946 | }
|
---|
| 947 |
|
---|
| 948 | /* writing list length */
|
---|
| 949 | c16toa(offset - OPAQUE16_LEN, output);
|
---|
| 950 |
|
---|
| 951 | return offset;
|
---|
| 952 | }
|
---|
| 953 |
|
---|
| 954 | /** Finds a protocol name in the provided ALPN list */
|
---|
| 955 | static ALPN* TLSX_ALPN_Find(ALPN *list, char *protocol_name, word16 size)
|
---|
| 956 | {
|
---|
| 957 | ALPN *alpn;
|
---|
| 958 |
|
---|
| 959 | if (list == NULL || protocol_name == NULL)
|
---|
| 960 | return NULL;
|
---|
| 961 |
|
---|
| 962 | alpn = list;
|
---|
| 963 | while (alpn != NULL && (
|
---|
| 964 | (word16)XSTRLEN(alpn->protocol_name) != size ||
|
---|
| 965 | XSTRNCMP(alpn->protocol_name, protocol_name, size)))
|
---|
| 966 | alpn = alpn->next;
|
---|
| 967 |
|
---|
| 968 | return alpn;
|
---|
| 969 | }
|
---|
| 970 |
|
---|
| 971 | /** Set the ALPN matching client and server requirements */
|
---|
| 972 | static int TLSX_SetALPN(TLSX** extensions, const void* data, word16 size)
|
---|
| 973 | {
|
---|
| 974 | ALPN *alpn;
|
---|
| 975 | int ret;
|
---|
| 976 |
|
---|
| 977 | if (extensions == NULL || data == NULL)
|
---|
| 978 | return BAD_FUNC_ARG;
|
---|
| 979 |
|
---|
| 980 | alpn = TLSX_ALPN_New((char *)data, size);
|
---|
| 981 | if (alpn == NULL) {
|
---|
| 982 | WOLFSSL_MSG("Memory failure");
|
---|
| 983 | return MEMORY_E;
|
---|
| 984 | }
|
---|
| 985 |
|
---|
| 986 | alpn->negociated = 1;
|
---|
| 987 |
|
---|
| 988 | ret = TLSX_Push(extensions, WOLFSSL_ALPN, (void*)alpn);
|
---|
| 989 | if (ret != 0) {
|
---|
| 990 | TLSX_ALPN_Free(alpn);
|
---|
| 991 | return ret;
|
---|
| 992 | }
|
---|
| 993 |
|
---|
| 994 | return SSL_SUCCESS;
|
---|
| 995 | }
|
---|
| 996 |
|
---|
| 997 | /** Parses a buffer of ALPN extensions and set the first one matching
|
---|
| 998 | * client and server requirements */
|
---|
| 999 | static int TLSX_ALPN_ParseAndSet(WOLFSSL *ssl, byte *input, word16 length,
|
---|
| 1000 | byte isRequest)
|
---|
| 1001 | {
|
---|
| 1002 | word16 size = 0, offset = 0, idx = 0;
|
---|
| 1003 | int r = BUFFER_ERROR;
|
---|
| 1004 | byte match = 0;
|
---|
| 1005 | TLSX *extension;
|
---|
| 1006 | ALPN *alpn = NULL, *list;
|
---|
| 1007 |
|
---|
| 1008 | extension = TLSX_Find(ssl->extensions, WOLFSSL_ALPN);
|
---|
| 1009 | if (extension == NULL)
|
---|
| 1010 | extension = TLSX_Find(ssl->ctx->extensions, WOLFSSL_ALPN);
|
---|
| 1011 |
|
---|
| 1012 | if (extension == NULL || extension->data == NULL) {
|
---|
| 1013 | WOLFSSL_MSG("No ALPN extensions not used or bad");
|
---|
| 1014 | return isRequest ? 0 /* not using ALPN */
|
---|
| 1015 | : BUFFER_ERROR; /* unexpected ALPN response */
|
---|
| 1016 | }
|
---|
| 1017 |
|
---|
| 1018 | if (OPAQUE16_LEN > length)
|
---|
| 1019 | return BUFFER_ERROR;
|
---|
| 1020 |
|
---|
| 1021 | ato16(input, &size);
|
---|
| 1022 | offset += OPAQUE16_LEN;
|
---|
| 1023 |
|
---|
| 1024 | /* validating alpn list length */
|
---|
| 1025 | if (length != OPAQUE16_LEN + size)
|
---|
| 1026 | return BUFFER_ERROR;
|
---|
| 1027 |
|
---|
| 1028 | list = (ALPN*)extension->data;
|
---|
| 1029 |
|
---|
| 1030 | /* keep the list sent by client */
|
---|
| 1031 | if (isRequest) {
|
---|
| 1032 | if (ssl->alpn_client_list != NULL)
|
---|
| 1033 | XFREE(ssl->alpn_client_list, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1034 |
|
---|
| 1035 | ssl->alpn_client_list = (char *)XMALLOC(size, NULL,
|
---|
| 1036 | DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 1037 | if (ssl->alpn_client_list == NULL)
|
---|
| 1038 | return MEMORY_ERROR;
|
---|
| 1039 | }
|
---|
| 1040 |
|
---|
| 1041 | for (size = 0; offset < length; offset += size) {
|
---|
| 1042 |
|
---|
| 1043 | size = input[offset++];
|
---|
| 1044 | if (offset + size > length)
|
---|
| 1045 | return BUFFER_ERROR;
|
---|
| 1046 |
|
---|
| 1047 | if (isRequest) {
|
---|
| 1048 | XMEMCPY(ssl->alpn_client_list+idx, (char*)input + offset, size);
|
---|
| 1049 | idx += size;
|
---|
| 1050 | ssl->alpn_client_list[idx++] = ',';
|
---|
| 1051 | }
|
---|
| 1052 |
|
---|
| 1053 | if (!match) {
|
---|
| 1054 | alpn = TLSX_ALPN_Find(list, (char*)input + offset, size);
|
---|
| 1055 | if (alpn != NULL) {
|
---|
| 1056 | WOLFSSL_MSG("ALPN protocol match");
|
---|
| 1057 | match = 1;
|
---|
| 1058 |
|
---|
| 1059 | /* skip reading other values if not required */
|
---|
| 1060 | if (!isRequest)
|
---|
| 1061 | break;
|
---|
| 1062 | }
|
---|
| 1063 | }
|
---|
| 1064 | }
|
---|
| 1065 |
|
---|
| 1066 | if (isRequest)
|
---|
| 1067 | ssl->alpn_client_list[idx-1] = 0;
|
---|
| 1068 |
|
---|
| 1069 | if (!match) {
|
---|
| 1070 | WOLFSSL_MSG("No ALPN protocol match");
|
---|
| 1071 |
|
---|
| 1072 | /* do nothing if no protocol match between client and server and option
|
---|
| 1073 | is set to continue (like OpenSSL) */
|
---|
| 1074 | if (list->options & WOLFSSL_ALPN_CONTINUE_ON_MISMATCH) {
|
---|
| 1075 | WOLFSSL_MSG("Continue on mismatch");
|
---|
| 1076 | return 0;
|
---|
| 1077 | }
|
---|
| 1078 |
|
---|
| 1079 | SendAlert(ssl, alert_fatal, no_application_protocol);
|
---|
| 1080 | return UNKNOWN_ALPN_PROTOCOL_NAME_E;
|
---|
| 1081 | }
|
---|
| 1082 |
|
---|
| 1083 | /* set the matching negociated protocol */
|
---|
| 1084 | r = TLSX_SetALPN(&ssl->extensions,
|
---|
| 1085 | alpn->protocol_name,
|
---|
| 1086 | (word16)XSTRLEN(alpn->protocol_name));
|
---|
| 1087 | if (r != SSL_SUCCESS) {
|
---|
| 1088 | WOLFSSL_MSG("TLSX_UseALPN failed");
|
---|
| 1089 | return BUFFER_ERROR;
|
---|
| 1090 | }
|
---|
| 1091 |
|
---|
| 1092 | /* reply to ALPN extension sent from client */
|
---|
| 1093 | if (isRequest) {
|
---|
| 1094 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1095 | TLSX_SetResponse(ssl, WOLFSSL_ALPN);
|
---|
| 1096 | #endif
|
---|
| 1097 | }
|
---|
| 1098 |
|
---|
| 1099 | return 0;
|
---|
| 1100 | }
|
---|
| 1101 |
|
---|
| 1102 | /** Add a protocol name to the list of accepted usable ones */
|
---|
| 1103 | int TLSX_UseALPN(TLSX** extensions, const void* data, word16 size, byte options)
|
---|
| 1104 | {
|
---|
| 1105 | ALPN *alpn;
|
---|
| 1106 | TLSX *extension;
|
---|
| 1107 | int ret;
|
---|
| 1108 |
|
---|
| 1109 | if (extensions == NULL || data == NULL)
|
---|
| 1110 | return BAD_FUNC_ARG;
|
---|
| 1111 |
|
---|
| 1112 | alpn = TLSX_ALPN_New((char *)data, size);
|
---|
| 1113 | if (alpn == NULL) {
|
---|
| 1114 | WOLFSSL_MSG("Memory failure");
|
---|
| 1115 | return MEMORY_E;
|
---|
| 1116 | }
|
---|
| 1117 |
|
---|
| 1118 | /* Set Options of ALPN */
|
---|
| 1119 | alpn->options = options;
|
---|
| 1120 |
|
---|
| 1121 | extension = TLSX_Find(*extensions, WOLFSSL_ALPN);
|
---|
| 1122 | if (extension == NULL) {
|
---|
| 1123 | ret = TLSX_Push(extensions, WOLFSSL_ALPN, (void*)alpn);
|
---|
| 1124 | if (ret != 0) {
|
---|
| 1125 | TLSX_ALPN_Free(alpn);
|
---|
| 1126 | return ret;
|
---|
| 1127 | }
|
---|
| 1128 | }
|
---|
| 1129 | else {
|
---|
| 1130 | /* push new ALPN object to extension data. */
|
---|
| 1131 | alpn->next = (ALPN*)extension->data;
|
---|
| 1132 | extension->data = (void*)alpn;
|
---|
| 1133 | }
|
---|
| 1134 |
|
---|
| 1135 | return SSL_SUCCESS;
|
---|
| 1136 | }
|
---|
| 1137 |
|
---|
| 1138 | /** Get the protocol name set by the server */
|
---|
| 1139 | int TLSX_ALPN_GetRequest(TLSX* extensions, void** data, word16 *dataSz)
|
---|
| 1140 | {
|
---|
| 1141 | TLSX *extension;
|
---|
| 1142 | ALPN *alpn;
|
---|
| 1143 |
|
---|
| 1144 | if (extensions == NULL || data == NULL || dataSz == NULL)
|
---|
| 1145 | return BAD_FUNC_ARG;
|
---|
| 1146 |
|
---|
| 1147 | extension = TLSX_Find(extensions, WOLFSSL_ALPN);
|
---|
| 1148 | if (extension == NULL) {
|
---|
| 1149 | WOLFSSL_MSG("TLS extension not found");
|
---|
| 1150 | return SSL_ALPN_NOT_FOUND;
|
---|
| 1151 | }
|
---|
| 1152 |
|
---|
| 1153 | alpn = (ALPN *)extension->data;
|
---|
| 1154 | if (alpn == NULL) {
|
---|
| 1155 | WOLFSSL_MSG("ALPN extension not found");
|
---|
| 1156 | *data = NULL;
|
---|
| 1157 | *dataSz = 0;
|
---|
| 1158 | return SSL_FATAL_ERROR;
|
---|
| 1159 | }
|
---|
| 1160 |
|
---|
| 1161 | if (alpn->negociated != 1) {
|
---|
| 1162 |
|
---|
| 1163 | /* consider as an error */
|
---|
| 1164 | if (alpn->options & WOLFSSL_ALPN_FAILED_ON_MISMATCH) {
|
---|
| 1165 | WOLFSSL_MSG("No protocol match with peer -> Failed");
|
---|
| 1166 | return SSL_FATAL_ERROR;
|
---|
| 1167 | }
|
---|
| 1168 |
|
---|
| 1169 | /* continue without negociated protocol */
|
---|
| 1170 | WOLFSSL_MSG("No protocol match with peer -> Continue");
|
---|
| 1171 | return SSL_ALPN_NOT_FOUND;
|
---|
| 1172 | }
|
---|
| 1173 |
|
---|
| 1174 | if (alpn->next != NULL) {
|
---|
| 1175 | WOLFSSL_MSG("Only one protocol name must be accepted");
|
---|
| 1176 | return SSL_FATAL_ERROR;
|
---|
| 1177 | }
|
---|
| 1178 |
|
---|
| 1179 | *data = alpn->protocol_name;
|
---|
| 1180 | *dataSz = (word16)XSTRLEN(*data);
|
---|
| 1181 |
|
---|
| 1182 | return SSL_SUCCESS;
|
---|
| 1183 | }
|
---|
| 1184 |
|
---|
| 1185 | #define ALPN_FREE_ALL TLSX_ALPN_FreeAll
|
---|
| 1186 | #define ALPN_GET_SIZE TLSX_ALPN_GetSize
|
---|
| 1187 | #define ALPN_WRITE TLSX_ALPN_Write
|
---|
| 1188 | #define ALPN_PARSE TLSX_ALPN_ParseAndSet
|
---|
| 1189 |
|
---|
| 1190 | #else /* HAVE_ALPN */
|
---|
| 1191 |
|
---|
| 1192 | #define ALPN_FREE_ALL(list)
|
---|
| 1193 | #define ALPN_GET_SIZE(list) 0
|
---|
| 1194 | #define ALPN_WRITE(a, b) 0
|
---|
| 1195 | #define ALPN_PARSE(a, b, c, d) 0
|
---|
| 1196 |
|
---|
| 1197 | #endif /* HAVE_ALPN */
|
---|
| 1198 |
|
---|
| 1199 | /* Server Name Indication */
|
---|
| 1200 | #ifdef HAVE_SNI
|
---|
| 1201 |
|
---|
| 1202 | /** Creates a new SNI object. */
|
---|
| 1203 | static SNI* TLSX_SNI_New(byte type, const void* data, word16 size)
|
---|
| 1204 | {
|
---|
| 1205 | SNI* sni = (SNI*)XMALLOC(sizeof(SNI), 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1206 |
|
---|
| 1207 | if (sni) {
|
---|
| 1208 | sni->type = type;
|
---|
| 1209 | sni->next = NULL;
|
---|
| 1210 |
|
---|
| 1211 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1212 | sni->options = 0;
|
---|
| 1213 | sni->status = WOLFSSL_SNI_NO_MATCH;
|
---|
| 1214 | #endif
|
---|
| 1215 |
|
---|
| 1216 | switch (sni->type) {
|
---|
| 1217 | case WOLFSSL_SNI_HOST_NAME:
|
---|
| 1218 | sni->data.host_name = XMALLOC(size + 1, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1219 |
|
---|
| 1220 | if (sni->data.host_name) {
|
---|
| 1221 | XSTRNCPY(sni->data.host_name, (const char*)data, size);
|
---|
| 1222 | sni->data.host_name[size] = 0;
|
---|
| 1223 | } else {
|
---|
| 1224 | XFREE(sni, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1225 | sni = NULL;
|
---|
| 1226 | }
|
---|
| 1227 | break;
|
---|
| 1228 |
|
---|
| 1229 | default: /* invalid type */
|
---|
| 1230 | XFREE(sni, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1231 | sni = NULL;
|
---|
| 1232 | }
|
---|
| 1233 | }
|
---|
| 1234 |
|
---|
| 1235 | return sni;
|
---|
| 1236 | }
|
---|
| 1237 |
|
---|
| 1238 | /** Releases a SNI object. */
|
---|
| 1239 | static void TLSX_SNI_Free(SNI* sni)
|
---|
| 1240 | {
|
---|
| 1241 | if (sni) {
|
---|
| 1242 | switch (sni->type) {
|
---|
| 1243 | case WOLFSSL_SNI_HOST_NAME:
|
---|
| 1244 | XFREE(sni->data.host_name, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1245 | break;
|
---|
| 1246 | }
|
---|
| 1247 |
|
---|
| 1248 | XFREE(sni, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1249 | }
|
---|
| 1250 | }
|
---|
| 1251 |
|
---|
| 1252 | /** Releases all SNI objects in the provided list. */
|
---|
| 1253 | static void TLSX_SNI_FreeAll(SNI* list)
|
---|
| 1254 | {
|
---|
| 1255 | SNI* sni;
|
---|
| 1256 |
|
---|
| 1257 | while ((sni = list)) {
|
---|
| 1258 | list = sni->next;
|
---|
| 1259 | TLSX_SNI_Free(sni);
|
---|
| 1260 | }
|
---|
| 1261 | }
|
---|
| 1262 |
|
---|
| 1263 | /** Tells the buffered size of the SNI objects in a list. */
|
---|
| 1264 | static word16 TLSX_SNI_GetSize(SNI* list)
|
---|
| 1265 | {
|
---|
| 1266 | SNI* sni;
|
---|
| 1267 | word16 length = OPAQUE16_LEN; /* list length */
|
---|
| 1268 |
|
---|
| 1269 | while ((sni = list)) {
|
---|
| 1270 | list = sni->next;
|
---|
| 1271 |
|
---|
| 1272 | length += ENUM_LEN + OPAQUE16_LEN; /* sni type + sni length */
|
---|
| 1273 |
|
---|
| 1274 | switch (sni->type) {
|
---|
| 1275 | case WOLFSSL_SNI_HOST_NAME:
|
---|
| 1276 | length += XSTRLEN((char*)sni->data.host_name);
|
---|
| 1277 | break;
|
---|
| 1278 | }
|
---|
| 1279 | }
|
---|
| 1280 |
|
---|
| 1281 | return length;
|
---|
| 1282 | }
|
---|
| 1283 |
|
---|
| 1284 | /** Writes the SNI objects of a list in a buffer. */
|
---|
| 1285 | static word16 TLSX_SNI_Write(SNI* list, byte* output)
|
---|
| 1286 | {
|
---|
| 1287 | SNI* sni;
|
---|
| 1288 | word16 length = 0;
|
---|
| 1289 | word16 offset = OPAQUE16_LEN; /* list length offset */
|
---|
| 1290 |
|
---|
| 1291 | while ((sni = list)) {
|
---|
| 1292 | list = sni->next;
|
---|
| 1293 |
|
---|
| 1294 | output[offset++] = sni->type; /* sni type */
|
---|
| 1295 |
|
---|
| 1296 | switch (sni->type) {
|
---|
| 1297 | case WOLFSSL_SNI_HOST_NAME:
|
---|
| 1298 | length = XSTRLEN((char*)sni->data.host_name);
|
---|
| 1299 |
|
---|
| 1300 | c16toa(length, output + offset); /* sni length */
|
---|
| 1301 | offset += OPAQUE16_LEN;
|
---|
| 1302 |
|
---|
| 1303 | XMEMCPY(output + offset, sni->data.host_name, length);
|
---|
| 1304 |
|
---|
| 1305 | offset += length;
|
---|
| 1306 | break;
|
---|
| 1307 | }
|
---|
| 1308 | }
|
---|
| 1309 |
|
---|
| 1310 | c16toa(offset - OPAQUE16_LEN, output); /* writing list length */
|
---|
| 1311 |
|
---|
| 1312 | return offset;
|
---|
| 1313 | }
|
---|
| 1314 |
|
---|
| 1315 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1316 |
|
---|
| 1317 | /** Finds a SNI object in the provided list. */
|
---|
| 1318 | static SNI* TLSX_SNI_Find(SNI *list, byte type)
|
---|
| 1319 | {
|
---|
| 1320 | SNI *sni = list;
|
---|
| 1321 |
|
---|
| 1322 | while (sni && sni->type != type)
|
---|
| 1323 | sni = sni->next;
|
---|
| 1324 |
|
---|
| 1325 | return sni;
|
---|
| 1326 | }
|
---|
| 1327 |
|
---|
| 1328 |
|
---|
| 1329 | /** Sets the status of a SNI object. */
|
---|
| 1330 | static void TLSX_SNI_SetStatus(TLSX* extensions, byte type, byte status)
|
---|
| 1331 | {
|
---|
| 1332 | TLSX* extension = TLSX_Find(extensions, SERVER_NAME_INDICATION);
|
---|
| 1333 | SNI* sni = TLSX_SNI_Find(extension ? extension->data : NULL, type);
|
---|
| 1334 |
|
---|
| 1335 | if (sni)
|
---|
| 1336 | sni->status = status;
|
---|
| 1337 | }
|
---|
| 1338 |
|
---|
| 1339 | /** Gets the status of a SNI object. */
|
---|
| 1340 | byte TLSX_SNI_Status(TLSX* extensions, byte type)
|
---|
| 1341 | {
|
---|
| 1342 | TLSX* extension = TLSX_Find(extensions, SERVER_NAME_INDICATION);
|
---|
| 1343 | SNI* sni = TLSX_SNI_Find(extension ? extension->data : NULL, type);
|
---|
| 1344 |
|
---|
| 1345 | if (sni)
|
---|
| 1346 | return sni->status;
|
---|
| 1347 |
|
---|
| 1348 | return 0;
|
---|
| 1349 | }
|
---|
| 1350 |
|
---|
| 1351 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 1352 |
|
---|
| 1353 | /** Parses a buffer of SNI extensions. */
|
---|
| 1354 | static int TLSX_SNI_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 1355 | byte isRequest)
|
---|
| 1356 | {
|
---|
| 1357 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1358 | word16 size = 0;
|
---|
| 1359 | word16 offset = 0;
|
---|
| 1360 | int cacheOnly = 0;
|
---|
| 1361 | #endif
|
---|
| 1362 |
|
---|
| 1363 | TLSX *extension = TLSX_Find(ssl->extensions, SERVER_NAME_INDICATION);
|
---|
| 1364 |
|
---|
| 1365 | if (!extension)
|
---|
| 1366 | extension = TLSX_Find(ssl->ctx->extensions, SERVER_NAME_INDICATION);
|
---|
| 1367 |
|
---|
| 1368 | (void)isRequest;
|
---|
| 1369 | (void)input;
|
---|
| 1370 |
|
---|
| 1371 | if (!extension || !extension->data) {
|
---|
| 1372 | #if defined(WOLFSSL_ALWAYS_KEEP_SNI) && !defined(NO_WOLFSSL_SERVER)
|
---|
| 1373 | /* This will keep SNI even though TLSX_UseSNI has not been called.
|
---|
| 1374 | * Enable it so that the received sni is available to functions
|
---|
| 1375 | * that use a custom callback when SNI is received */
|
---|
| 1376 | cacheOnly = 1;
|
---|
| 1377 | WOLFSSL_MSG("Forcing SSL object to store SNI parameter");
|
---|
| 1378 | #else
|
---|
| 1379 | return isRequest ? 0 /* not using SNI. */
|
---|
| 1380 | : BUFFER_ERROR; /* unexpected SNI response. */
|
---|
| 1381 | #endif
|
---|
| 1382 | }
|
---|
| 1383 |
|
---|
| 1384 | if (!isRequest)
|
---|
| 1385 | return length ? BUFFER_ERROR /* SNI response MUST be empty. */
|
---|
| 1386 | : 0; /* nothing else to do. */
|
---|
| 1387 |
|
---|
| 1388 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1389 |
|
---|
| 1390 | if (OPAQUE16_LEN > length)
|
---|
| 1391 | return BUFFER_ERROR;
|
---|
| 1392 |
|
---|
| 1393 | ato16(input, &size);
|
---|
| 1394 | offset += OPAQUE16_LEN;
|
---|
| 1395 |
|
---|
| 1396 | /* validating sni list length */
|
---|
| 1397 | if (length != OPAQUE16_LEN + size)
|
---|
| 1398 | return BUFFER_ERROR;
|
---|
| 1399 |
|
---|
| 1400 | for (size = 0; offset < length; offset += size) {
|
---|
| 1401 | SNI *sni = NULL;
|
---|
| 1402 | byte type = input[offset++];
|
---|
| 1403 |
|
---|
| 1404 | if (offset + OPAQUE16_LEN > length)
|
---|
| 1405 | return BUFFER_ERROR;
|
---|
| 1406 |
|
---|
| 1407 | ato16(input + offset, &size);
|
---|
| 1408 | offset += OPAQUE16_LEN;
|
---|
| 1409 |
|
---|
| 1410 | if (offset + size > length)
|
---|
| 1411 | return BUFFER_ERROR;
|
---|
| 1412 |
|
---|
| 1413 | if (!cacheOnly && !(sni = TLSX_SNI_Find((SNI*)extension->data, type)))
|
---|
| 1414 | continue; /* not using this type of SNI. */
|
---|
| 1415 |
|
---|
| 1416 | switch(type) {
|
---|
| 1417 | case WOLFSSL_SNI_HOST_NAME: {
|
---|
| 1418 | int matchStat;
|
---|
| 1419 | byte matched = cacheOnly ||
|
---|
| 1420 | ((XSTRLEN(sni->data.host_name) == size)
|
---|
| 1421 | && (XSTRNCMP(sni->data.host_name,
|
---|
| 1422 | (const char*)input + offset, size) == 0));
|
---|
| 1423 |
|
---|
| 1424 | if (matched || sni->options & WOLFSSL_SNI_ANSWER_ON_MISMATCH) {
|
---|
| 1425 | int r = TLSX_UseSNI(&ssl->extensions,
|
---|
| 1426 | type, input + offset, size);
|
---|
| 1427 |
|
---|
| 1428 | if (r != SSL_SUCCESS)
|
---|
| 1429 | return r; /* throws error. */
|
---|
| 1430 |
|
---|
| 1431 | if(cacheOnly) {
|
---|
| 1432 | WOLFSSL_MSG("Forcing storage of SNI, Fake match");
|
---|
| 1433 | matchStat = WOLFSSL_SNI_FORCE_KEEP;
|
---|
| 1434 | } else if(matched) {
|
---|
| 1435 | WOLFSSL_MSG("SNI did match!");
|
---|
| 1436 | matchStat = WOLFSSL_SNI_REAL_MATCH;
|
---|
| 1437 | } else {
|
---|
| 1438 | WOLFSSL_MSG("fake SNI match from ANSWER_ON_MISMATCH");
|
---|
| 1439 | matchStat = WOLFSSL_SNI_FAKE_MATCH;
|
---|
| 1440 | }
|
---|
| 1441 |
|
---|
| 1442 | TLSX_SNI_SetStatus(ssl->extensions, type, matchStat);
|
---|
| 1443 |
|
---|
| 1444 | if(!cacheOnly)
|
---|
| 1445 | TLSX_SetResponse(ssl, SERVER_NAME_INDICATION);
|
---|
| 1446 |
|
---|
| 1447 | } else if (!(sni->options & WOLFSSL_SNI_CONTINUE_ON_MISMATCH)) {
|
---|
| 1448 | SendAlert(ssl, alert_fatal, unrecognized_name);
|
---|
| 1449 |
|
---|
| 1450 | return UNKNOWN_SNI_HOST_NAME_E;
|
---|
| 1451 | }
|
---|
| 1452 | break;
|
---|
| 1453 | }
|
---|
| 1454 | }
|
---|
| 1455 | }
|
---|
| 1456 |
|
---|
| 1457 | #endif
|
---|
| 1458 |
|
---|
| 1459 | return 0;
|
---|
| 1460 | }
|
---|
| 1461 |
|
---|
| 1462 | static int TLSX_SNI_VerifyParse(WOLFSSL* ssl, byte isRequest)
|
---|
| 1463 | {
|
---|
| 1464 | (void)ssl;
|
---|
| 1465 |
|
---|
| 1466 | if (isRequest) {
|
---|
| 1467 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1468 | TLSX* ctx_ext = TLSX_Find(ssl->ctx->extensions, SERVER_NAME_INDICATION);
|
---|
| 1469 | TLSX* ssl_ext = TLSX_Find(ssl->extensions, SERVER_NAME_INDICATION);
|
---|
| 1470 | SNI* ctx_sni = ctx_ext ? ctx_ext->data : NULL;
|
---|
| 1471 | SNI* ssl_sni = ssl_ext ? ssl_ext->data : NULL;
|
---|
| 1472 | SNI* sni = NULL;
|
---|
| 1473 |
|
---|
| 1474 | for (; ctx_sni; ctx_sni = ctx_sni->next) {
|
---|
| 1475 | if (ctx_sni->options & WOLFSSL_SNI_ABORT_ON_ABSENCE) {
|
---|
| 1476 | sni = TLSX_SNI_Find(ssl_sni, ctx_sni->type);
|
---|
| 1477 |
|
---|
| 1478 | if (sni) {
|
---|
| 1479 | if (sni->status != WOLFSSL_SNI_NO_MATCH)
|
---|
| 1480 | continue;
|
---|
| 1481 |
|
---|
| 1482 | /* if ssl level overrides ctx level, it is ok. */
|
---|
| 1483 | if ((sni->options & WOLFSSL_SNI_ABORT_ON_ABSENCE) == 0)
|
---|
| 1484 | continue;
|
---|
| 1485 | }
|
---|
| 1486 |
|
---|
| 1487 | SendAlert(ssl, alert_fatal, handshake_failure);
|
---|
| 1488 | return SNI_ABSENT_ERROR;
|
---|
| 1489 | }
|
---|
| 1490 | }
|
---|
| 1491 |
|
---|
| 1492 | for (; ssl_sni; ssl_sni = ssl_sni->next) {
|
---|
| 1493 | if (ssl_sni->options & WOLFSSL_SNI_ABORT_ON_ABSENCE) {
|
---|
| 1494 | if (ssl_sni->status != WOLFSSL_SNI_NO_MATCH)
|
---|
| 1495 | continue;
|
---|
| 1496 |
|
---|
| 1497 | SendAlert(ssl, alert_fatal, handshake_failure);
|
---|
| 1498 | return SNI_ABSENT_ERROR;
|
---|
| 1499 | }
|
---|
| 1500 | }
|
---|
| 1501 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 1502 | }
|
---|
| 1503 |
|
---|
| 1504 | return 0;
|
---|
| 1505 | }
|
---|
| 1506 |
|
---|
| 1507 | int TLSX_UseSNI(TLSX** extensions, byte type, const void* data, word16 size)
|
---|
| 1508 | {
|
---|
| 1509 | TLSX* extension = TLSX_Find(*extensions, SERVER_NAME_INDICATION);
|
---|
| 1510 | SNI* sni = NULL;
|
---|
| 1511 |
|
---|
| 1512 | if (extensions == NULL || data == NULL)
|
---|
| 1513 | return BAD_FUNC_ARG;
|
---|
| 1514 |
|
---|
| 1515 | if ((sni = TLSX_SNI_New(type, data, size)) == NULL)
|
---|
| 1516 | return MEMORY_E;
|
---|
| 1517 |
|
---|
| 1518 | if (!extension) {
|
---|
| 1519 | int ret = TLSX_Push(extensions, SERVER_NAME_INDICATION, (void*)sni);
|
---|
| 1520 | if (ret != 0) {
|
---|
| 1521 | TLSX_SNI_Free(sni);
|
---|
| 1522 | return ret;
|
---|
| 1523 | }
|
---|
| 1524 | }
|
---|
| 1525 | else {
|
---|
| 1526 | /* push new SNI object to extension data. */
|
---|
| 1527 | sni->next = (SNI*)extension->data;
|
---|
| 1528 | extension->data = (void*)sni;
|
---|
| 1529 |
|
---|
| 1530 | /* remove duplicate SNI, there should be only one of each type. */
|
---|
| 1531 | do {
|
---|
| 1532 | if (sni->next && sni->next->type == type) {
|
---|
| 1533 | SNI *next = sni->next;
|
---|
| 1534 |
|
---|
| 1535 | sni->next = next->next;
|
---|
| 1536 | TLSX_SNI_Free(next);
|
---|
| 1537 |
|
---|
| 1538 | /* there is no way to occur more than */
|
---|
| 1539 | /* two SNIs of the same type. */
|
---|
| 1540 | break;
|
---|
| 1541 | }
|
---|
| 1542 | } while ((sni = sni->next));
|
---|
| 1543 | }
|
---|
| 1544 |
|
---|
| 1545 | return SSL_SUCCESS;
|
---|
| 1546 | }
|
---|
| 1547 |
|
---|
| 1548 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1549 |
|
---|
| 1550 | /** Tells the SNI requested by the client. */
|
---|
| 1551 | word16 TLSX_SNI_GetRequest(TLSX* extensions, byte type, void** data)
|
---|
| 1552 | {
|
---|
| 1553 | TLSX* extension = TLSX_Find(extensions, SERVER_NAME_INDICATION);
|
---|
| 1554 | SNI* sni = TLSX_SNI_Find(extension ? extension->data : NULL, type);
|
---|
| 1555 |
|
---|
| 1556 | if (sni && sni->status != WOLFSSL_SNI_NO_MATCH) {
|
---|
| 1557 | switch (sni->type) {
|
---|
| 1558 | case WOLFSSL_SNI_HOST_NAME:
|
---|
| 1559 | *data = sni->data.host_name;
|
---|
| 1560 | return XSTRLEN(*data);
|
---|
| 1561 | }
|
---|
| 1562 | }
|
---|
| 1563 |
|
---|
| 1564 | return 0;
|
---|
| 1565 | }
|
---|
| 1566 |
|
---|
| 1567 | /** Sets the options for a SNI object. */
|
---|
| 1568 | void TLSX_SNI_SetOptions(TLSX* extensions, byte type, byte options)
|
---|
| 1569 | {
|
---|
| 1570 | TLSX* extension = TLSX_Find(extensions, SERVER_NAME_INDICATION);
|
---|
| 1571 | SNI* sni = TLSX_SNI_Find(extension ? extension->data : NULL, type);
|
---|
| 1572 |
|
---|
| 1573 | if (sni)
|
---|
| 1574 | sni->options = options;
|
---|
| 1575 | }
|
---|
| 1576 |
|
---|
| 1577 | /** Retrieves a SNI request from a client hello buffer. */
|
---|
| 1578 | int TLSX_SNI_GetFromBuffer(const byte* clientHello, word32 helloSz,
|
---|
| 1579 | byte type, byte* sni, word32* inOutSz)
|
---|
| 1580 | {
|
---|
| 1581 | word32 offset = 0;
|
---|
| 1582 | word32 len32 = 0;
|
---|
| 1583 | word16 len16 = 0;
|
---|
| 1584 |
|
---|
| 1585 | if (helloSz < RECORD_HEADER_SZ + HANDSHAKE_HEADER_SZ + CLIENT_HELLO_FIRST)
|
---|
| 1586 | return INCOMPLETE_DATA;
|
---|
| 1587 |
|
---|
| 1588 | /* TLS record header */
|
---|
| 1589 | if ((enum ContentType) clientHello[offset++] != handshake) {
|
---|
| 1590 |
|
---|
| 1591 | /* checking for SSLv2.0 client hello according to: */
|
---|
| 1592 | /* http://tools.ietf.org/html/rfc4346#appendix-E.1 */
|
---|
| 1593 | if ((enum HandShakeType) clientHello[++offset] == client_hello) {
|
---|
| 1594 | offset += ENUM_LEN + VERSION_SZ; /* skip version */
|
---|
| 1595 |
|
---|
| 1596 | ato16(clientHello + offset, &len16);
|
---|
| 1597 | offset += OPAQUE16_LEN;
|
---|
| 1598 |
|
---|
| 1599 | if (len16 % 3) /* cipher_spec_length must be multiple of 3 */
|
---|
| 1600 | return BUFFER_ERROR;
|
---|
| 1601 |
|
---|
| 1602 | ato16(clientHello + offset, &len16);
|
---|
| 1603 | offset += OPAQUE16_LEN;
|
---|
| 1604 |
|
---|
| 1605 | if (len16 != 0) /* session_id_length must be 0 */
|
---|
| 1606 | return BUFFER_ERROR;
|
---|
| 1607 |
|
---|
| 1608 | return SNI_UNSUPPORTED;
|
---|
| 1609 | }
|
---|
| 1610 |
|
---|
| 1611 | return BUFFER_ERROR;
|
---|
| 1612 | }
|
---|
| 1613 |
|
---|
| 1614 | if (clientHello[offset++] != SSLv3_MAJOR)
|
---|
| 1615 | return BUFFER_ERROR;
|
---|
| 1616 |
|
---|
| 1617 | if (clientHello[offset++] < TLSv1_MINOR)
|
---|
| 1618 | return SNI_UNSUPPORTED;
|
---|
| 1619 |
|
---|
| 1620 | ato16(clientHello + offset, &len16);
|
---|
| 1621 | offset += OPAQUE16_LEN;
|
---|
| 1622 |
|
---|
| 1623 | if (offset + len16 > helloSz)
|
---|
| 1624 | return INCOMPLETE_DATA;
|
---|
| 1625 |
|
---|
| 1626 | /* Handshake header */
|
---|
| 1627 | if ((enum HandShakeType) clientHello[offset] != client_hello)
|
---|
| 1628 | return BUFFER_ERROR;
|
---|
| 1629 |
|
---|
| 1630 | c24to32(clientHello + offset + 1, &len32);
|
---|
| 1631 | offset += HANDSHAKE_HEADER_SZ;
|
---|
| 1632 |
|
---|
| 1633 | if (offset + len32 > helloSz)
|
---|
| 1634 | return BUFFER_ERROR;
|
---|
| 1635 |
|
---|
| 1636 | /* client hello */
|
---|
| 1637 | offset += VERSION_SZ + RAN_LEN; /* version, random */
|
---|
| 1638 |
|
---|
| 1639 | if (helloSz < offset + clientHello[offset])
|
---|
| 1640 | return BUFFER_ERROR;
|
---|
| 1641 |
|
---|
| 1642 | offset += ENUM_LEN + clientHello[offset]; /* skip session id */
|
---|
| 1643 |
|
---|
| 1644 | /* cypher suites */
|
---|
| 1645 | if (helloSz < offset + OPAQUE16_LEN)
|
---|
| 1646 | return BUFFER_ERROR;
|
---|
| 1647 |
|
---|
| 1648 | ato16(clientHello + offset, &len16);
|
---|
| 1649 | offset += OPAQUE16_LEN;
|
---|
| 1650 |
|
---|
| 1651 | if (helloSz < offset + len16)
|
---|
| 1652 | return BUFFER_ERROR;
|
---|
| 1653 |
|
---|
| 1654 | offset += len16; /* skip cypher suites */
|
---|
| 1655 |
|
---|
| 1656 | /* compression methods */
|
---|
| 1657 | if (helloSz < offset + 1)
|
---|
| 1658 | return BUFFER_ERROR;
|
---|
| 1659 |
|
---|
| 1660 | if (helloSz < offset + clientHello[offset])
|
---|
| 1661 | return BUFFER_ERROR;
|
---|
| 1662 |
|
---|
| 1663 | offset += ENUM_LEN + clientHello[offset]; /* skip compression methods */
|
---|
| 1664 |
|
---|
| 1665 | /* extensions */
|
---|
| 1666 | if (helloSz < offset + OPAQUE16_LEN)
|
---|
| 1667 | return 0; /* no extensions in client hello. */
|
---|
| 1668 |
|
---|
| 1669 | ato16(clientHello + offset, &len16);
|
---|
| 1670 | offset += OPAQUE16_LEN;
|
---|
| 1671 |
|
---|
| 1672 | if (helloSz < offset + len16)
|
---|
| 1673 | return BUFFER_ERROR;
|
---|
| 1674 |
|
---|
| 1675 | while (len16 >= OPAQUE16_LEN + OPAQUE16_LEN) {
|
---|
| 1676 | word16 extType;
|
---|
| 1677 | word16 extLen;
|
---|
| 1678 |
|
---|
| 1679 | ato16(clientHello + offset, &extType);
|
---|
| 1680 | offset += OPAQUE16_LEN;
|
---|
| 1681 |
|
---|
| 1682 | ato16(clientHello + offset, &extLen);
|
---|
| 1683 | offset += OPAQUE16_LEN;
|
---|
| 1684 |
|
---|
| 1685 | if (helloSz < offset + extLen)
|
---|
| 1686 | return BUFFER_ERROR;
|
---|
| 1687 |
|
---|
| 1688 | if (extType != SERVER_NAME_INDICATION) {
|
---|
| 1689 | offset += extLen; /* skip extension */
|
---|
| 1690 | } else {
|
---|
| 1691 | word16 listLen;
|
---|
| 1692 |
|
---|
| 1693 | ato16(clientHello + offset, &listLen);
|
---|
| 1694 | offset += OPAQUE16_LEN;
|
---|
| 1695 |
|
---|
| 1696 | if (helloSz < offset + listLen)
|
---|
| 1697 | return BUFFER_ERROR;
|
---|
| 1698 |
|
---|
| 1699 | while (listLen > ENUM_LEN + OPAQUE16_LEN) {
|
---|
| 1700 | byte sniType = clientHello[offset++];
|
---|
| 1701 | word16 sniLen;
|
---|
| 1702 |
|
---|
| 1703 | ato16(clientHello + offset, &sniLen);
|
---|
| 1704 | offset += OPAQUE16_LEN;
|
---|
| 1705 |
|
---|
| 1706 | if (helloSz < offset + sniLen)
|
---|
| 1707 | return BUFFER_ERROR;
|
---|
| 1708 |
|
---|
| 1709 | if (sniType != type) {
|
---|
| 1710 | offset += sniLen;
|
---|
| 1711 | listLen -= min(ENUM_LEN + OPAQUE16_LEN + sniLen, listLen);
|
---|
| 1712 | continue;
|
---|
| 1713 | }
|
---|
| 1714 |
|
---|
| 1715 | *inOutSz = min(sniLen, *inOutSz);
|
---|
| 1716 | XMEMCPY(sni, clientHello + offset, *inOutSz);
|
---|
| 1717 |
|
---|
| 1718 | return SSL_SUCCESS;
|
---|
| 1719 | }
|
---|
| 1720 | }
|
---|
| 1721 |
|
---|
| 1722 | len16 -= min(2 * OPAQUE16_LEN + extLen, len16);
|
---|
| 1723 | }
|
---|
| 1724 |
|
---|
| 1725 | return len16 ? BUFFER_ERROR : 0;
|
---|
| 1726 | }
|
---|
| 1727 |
|
---|
| 1728 | #endif
|
---|
| 1729 |
|
---|
| 1730 | #define SNI_FREE_ALL TLSX_SNI_FreeAll
|
---|
| 1731 | #define SNI_GET_SIZE TLSX_SNI_GetSize
|
---|
| 1732 | #define SNI_WRITE TLSX_SNI_Write
|
---|
| 1733 | #define SNI_PARSE TLSX_SNI_Parse
|
---|
| 1734 | #define SNI_VERIFY_PARSE TLSX_SNI_VerifyParse
|
---|
| 1735 |
|
---|
| 1736 | #else
|
---|
| 1737 |
|
---|
| 1738 | #define SNI_FREE_ALL(list)
|
---|
| 1739 | #define SNI_GET_SIZE(list) 0
|
---|
| 1740 | #define SNI_WRITE(a, b) 0
|
---|
| 1741 | #define SNI_PARSE(a, b, c, d) 0
|
---|
| 1742 | #define SNI_VERIFY_PARSE(a, b) 0
|
---|
| 1743 |
|
---|
| 1744 | #endif /* HAVE_SNI */
|
---|
| 1745 |
|
---|
| 1746 | #ifdef HAVE_MAX_FRAGMENT
|
---|
| 1747 |
|
---|
| 1748 | static word16 TLSX_MFL_Write(byte* data, byte* output)
|
---|
| 1749 | {
|
---|
| 1750 | output[0] = data[0];
|
---|
| 1751 |
|
---|
| 1752 | return ENUM_LEN;
|
---|
| 1753 | }
|
---|
| 1754 |
|
---|
| 1755 | static int TLSX_MFL_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 1756 | byte isRequest)
|
---|
| 1757 | {
|
---|
| 1758 | (void)isRequest;
|
---|
| 1759 |
|
---|
| 1760 | if (length != ENUM_LEN)
|
---|
| 1761 | return BUFFER_ERROR;
|
---|
| 1762 |
|
---|
| 1763 | switch (*input) {
|
---|
| 1764 | case WOLFSSL_MFL_2_9 : ssl->max_fragment = 512; break;
|
---|
| 1765 | case WOLFSSL_MFL_2_10: ssl->max_fragment = 1024; break;
|
---|
| 1766 | case WOLFSSL_MFL_2_11: ssl->max_fragment = 2048; break;
|
---|
| 1767 | case WOLFSSL_MFL_2_12: ssl->max_fragment = 4096; break;
|
---|
| 1768 | case WOLFSSL_MFL_2_13: ssl->max_fragment = 8192; break;
|
---|
| 1769 |
|
---|
| 1770 | default:
|
---|
| 1771 | SendAlert(ssl, alert_fatal, illegal_parameter);
|
---|
| 1772 |
|
---|
| 1773 | return UNKNOWN_MAX_FRAG_LEN_E;
|
---|
| 1774 | }
|
---|
| 1775 |
|
---|
| 1776 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1777 | if (isRequest) {
|
---|
| 1778 | int r = TLSX_UseMaxFragment(&ssl->extensions, *input);
|
---|
| 1779 |
|
---|
| 1780 | if (r != SSL_SUCCESS) return r; /* throw error */
|
---|
| 1781 |
|
---|
| 1782 | TLSX_SetResponse(ssl, MAX_FRAGMENT_LENGTH);
|
---|
| 1783 | }
|
---|
| 1784 | #endif
|
---|
| 1785 |
|
---|
| 1786 | return 0;
|
---|
| 1787 | }
|
---|
| 1788 |
|
---|
| 1789 | int TLSX_UseMaxFragment(TLSX** extensions, byte mfl)
|
---|
| 1790 | {
|
---|
| 1791 | byte* data = NULL;
|
---|
| 1792 | int ret = 0;
|
---|
| 1793 |
|
---|
| 1794 | if (extensions == NULL)
|
---|
| 1795 | return BAD_FUNC_ARG;
|
---|
| 1796 |
|
---|
| 1797 | if (mfl < WOLFSSL_MFL_2_9 || WOLFSSL_MFL_2_13 < mfl)
|
---|
| 1798 | return BAD_FUNC_ARG;
|
---|
| 1799 |
|
---|
| 1800 | if ((data = XMALLOC(ENUM_LEN, 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 1801 | return MEMORY_E;
|
---|
| 1802 |
|
---|
| 1803 | data[0] = mfl;
|
---|
| 1804 |
|
---|
| 1805 | /* push new MFL extension. */
|
---|
| 1806 | if ((ret = TLSX_Push(extensions, MAX_FRAGMENT_LENGTH, data)) != 0) {
|
---|
| 1807 | XFREE(data, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1808 | return ret;
|
---|
| 1809 | }
|
---|
| 1810 |
|
---|
| 1811 | return SSL_SUCCESS;
|
---|
| 1812 | }
|
---|
| 1813 |
|
---|
| 1814 |
|
---|
| 1815 | #define MFL_FREE_ALL(data) XFREE(data, 0, DYNAMIC_TYPE_TLSX)
|
---|
| 1816 | #define MFL_GET_SIZE(data) ENUM_LEN
|
---|
| 1817 | #define MFL_WRITE TLSX_MFL_Write
|
---|
| 1818 | #define MFL_PARSE TLSX_MFL_Parse
|
---|
| 1819 |
|
---|
| 1820 | #else
|
---|
| 1821 |
|
---|
| 1822 | #define MFL_FREE_ALL(a)
|
---|
| 1823 | #define MFL_GET_SIZE(a) 0
|
---|
| 1824 | #define MFL_WRITE(a, b) 0
|
---|
| 1825 | #define MFL_PARSE(a, b, c, d) 0
|
---|
| 1826 |
|
---|
| 1827 | #endif /* HAVE_MAX_FRAGMENT */
|
---|
| 1828 |
|
---|
| 1829 | #ifdef HAVE_TRUNCATED_HMAC
|
---|
| 1830 |
|
---|
| 1831 | static int TLSX_THM_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 1832 | byte isRequest)
|
---|
| 1833 | {
|
---|
| 1834 | (void)isRequest;
|
---|
| 1835 |
|
---|
| 1836 | if (length != 0 || input == NULL)
|
---|
| 1837 | return BUFFER_ERROR;
|
---|
| 1838 |
|
---|
| 1839 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1840 | if (isRequest) {
|
---|
| 1841 | int r = TLSX_UseTruncatedHMAC(&ssl->extensions);
|
---|
| 1842 |
|
---|
| 1843 | if (r != SSL_SUCCESS) return r; /* throw error */
|
---|
| 1844 |
|
---|
| 1845 | TLSX_SetResponse(ssl, TRUNCATED_HMAC);
|
---|
| 1846 | }
|
---|
| 1847 | #endif
|
---|
| 1848 |
|
---|
| 1849 | ssl->truncated_hmac = 1;
|
---|
| 1850 |
|
---|
| 1851 | return 0;
|
---|
| 1852 | }
|
---|
| 1853 |
|
---|
| 1854 | int TLSX_UseTruncatedHMAC(TLSX** extensions)
|
---|
| 1855 | {
|
---|
| 1856 | int ret = 0;
|
---|
| 1857 |
|
---|
| 1858 | if (extensions == NULL)
|
---|
| 1859 | return BAD_FUNC_ARG;
|
---|
| 1860 |
|
---|
| 1861 | if ((ret = TLSX_Push(extensions, TRUNCATED_HMAC, NULL)) != 0)
|
---|
| 1862 | return ret;
|
---|
| 1863 |
|
---|
| 1864 | return SSL_SUCCESS;
|
---|
| 1865 | }
|
---|
| 1866 |
|
---|
| 1867 | #define THM_PARSE TLSX_THM_Parse
|
---|
| 1868 |
|
---|
| 1869 | #else
|
---|
| 1870 |
|
---|
| 1871 | #define THM_PARSE(a, b, c, d) 0
|
---|
| 1872 |
|
---|
| 1873 | #endif /* HAVE_TRUNCATED_HMAC */
|
---|
| 1874 |
|
---|
| 1875 | #ifdef HAVE_SUPPORTED_CURVES
|
---|
| 1876 |
|
---|
| 1877 | #ifndef HAVE_ECC
|
---|
| 1878 | #error Elliptic Curves Extension requires Elliptic Curve Cryptography. \
|
---|
| 1879 | Use --enable-ecc in the configure script or define HAVE_ECC.
|
---|
| 1880 | #endif
|
---|
| 1881 |
|
---|
| 1882 | static void TLSX_EllipticCurve_FreeAll(EllipticCurve* list)
|
---|
| 1883 | {
|
---|
| 1884 | EllipticCurve* curve;
|
---|
| 1885 |
|
---|
| 1886 | while ((curve = list)) {
|
---|
| 1887 | list = curve->next;
|
---|
| 1888 | XFREE(curve, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 1889 | }
|
---|
| 1890 | }
|
---|
| 1891 |
|
---|
| 1892 | static int TLSX_EllipticCurve_Append(EllipticCurve** list, word16 name)
|
---|
| 1893 | {
|
---|
| 1894 | EllipticCurve* curve;
|
---|
| 1895 |
|
---|
| 1896 | if (list == NULL)
|
---|
| 1897 | return BAD_FUNC_ARG;
|
---|
| 1898 |
|
---|
| 1899 | if ((curve = XMALLOC(sizeof(EllipticCurve), 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 1900 | return MEMORY_E;
|
---|
| 1901 |
|
---|
| 1902 | curve->name = name;
|
---|
| 1903 | curve->next = *list;
|
---|
| 1904 |
|
---|
| 1905 | *list = curve;
|
---|
| 1906 |
|
---|
| 1907 | return 0;
|
---|
| 1908 | }
|
---|
| 1909 |
|
---|
| 1910 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 1911 |
|
---|
| 1912 | static void TLSX_EllipticCurve_ValidateRequest(WOLFSSL* ssl, byte* semaphore)
|
---|
| 1913 | {
|
---|
| 1914 | int i;
|
---|
| 1915 |
|
---|
| 1916 | for (i = 0; i < ssl->suites->suiteSz; i+= 2)
|
---|
| 1917 | if (ssl->suites->suites[i] == ECC_BYTE)
|
---|
| 1918 | return;
|
---|
| 1919 |
|
---|
| 1920 | /* turns semaphore on to avoid sending this extension. */
|
---|
| 1921 | TURN_ON(semaphore, TLSX_ToSemaphore(ELLIPTIC_CURVES));
|
---|
| 1922 | }
|
---|
| 1923 |
|
---|
| 1924 | static word16 TLSX_EllipticCurve_GetSize(EllipticCurve* list)
|
---|
| 1925 | {
|
---|
| 1926 | EllipticCurve* curve;
|
---|
| 1927 | word16 length = OPAQUE16_LEN; /* list length */
|
---|
| 1928 |
|
---|
| 1929 | while ((curve = list)) {
|
---|
| 1930 | list = curve->next;
|
---|
| 1931 | length += OPAQUE16_LEN; /* curve length */
|
---|
| 1932 | }
|
---|
| 1933 |
|
---|
| 1934 | return length;
|
---|
| 1935 | }
|
---|
| 1936 |
|
---|
| 1937 | static word16 TLSX_EllipticCurve_WriteR(EllipticCurve* curve, byte* output);
|
---|
| 1938 | static word16 TLSX_EllipticCurve_WriteR(EllipticCurve* curve, byte* output)
|
---|
| 1939 | {
|
---|
| 1940 | word16 offset = 0;
|
---|
| 1941 |
|
---|
| 1942 | if (!curve)
|
---|
| 1943 | return offset;
|
---|
| 1944 |
|
---|
| 1945 | offset = TLSX_EllipticCurve_WriteR(curve->next, output);
|
---|
| 1946 | c16toa(curve->name, output + offset);
|
---|
| 1947 |
|
---|
| 1948 | return OPAQUE16_LEN + offset;
|
---|
| 1949 | }
|
---|
| 1950 |
|
---|
| 1951 | static word16 TLSX_EllipticCurve_Write(EllipticCurve* list, byte* output)
|
---|
| 1952 | {
|
---|
| 1953 | word16 length = TLSX_EllipticCurve_WriteR(list, output + OPAQUE16_LEN);
|
---|
| 1954 |
|
---|
| 1955 | c16toa(length, output); /* writing list length */
|
---|
| 1956 |
|
---|
| 1957 | return OPAQUE16_LEN + length;
|
---|
| 1958 | }
|
---|
| 1959 |
|
---|
| 1960 | #endif /* NO_WOLFSSL_CLIENT */
|
---|
| 1961 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 1962 |
|
---|
| 1963 | static int TLSX_EllipticCurve_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 1964 | byte isRequest)
|
---|
| 1965 | {
|
---|
| 1966 | word16 offset;
|
---|
| 1967 | word16 name;
|
---|
| 1968 | int r;
|
---|
| 1969 |
|
---|
| 1970 | (void) isRequest; /* shut up compiler! */
|
---|
| 1971 |
|
---|
| 1972 | if (OPAQUE16_LEN > length || length % OPAQUE16_LEN)
|
---|
| 1973 | return BUFFER_ERROR;
|
---|
| 1974 |
|
---|
| 1975 | ato16(input, &offset);
|
---|
| 1976 |
|
---|
| 1977 | /* validating curve list length */
|
---|
| 1978 | if (length != OPAQUE16_LEN + offset)
|
---|
| 1979 | return BUFFER_ERROR;
|
---|
| 1980 |
|
---|
| 1981 | while (offset) {
|
---|
| 1982 | ato16(input + offset, &name);
|
---|
| 1983 | offset -= OPAQUE16_LEN;
|
---|
| 1984 |
|
---|
| 1985 | r = TLSX_UseSupportedCurve(&ssl->extensions, name);
|
---|
| 1986 |
|
---|
| 1987 | if (r != SSL_SUCCESS) return r; /* throw error */
|
---|
| 1988 | }
|
---|
| 1989 |
|
---|
| 1990 | return 0;
|
---|
| 1991 | }
|
---|
| 1992 |
|
---|
| 1993 | int TLSX_ValidateEllipticCurves(WOLFSSL* ssl, byte first, byte second) {
|
---|
| 1994 | TLSX* extension = (first == ECC_BYTE)
|
---|
| 1995 | ? TLSX_Find(ssl->extensions, ELLIPTIC_CURVES)
|
---|
| 1996 | : NULL;
|
---|
| 1997 | EllipticCurve* curve = NULL;
|
---|
| 1998 | word32 oid = 0;
|
---|
| 1999 | word16 octets = 0; /* acording to 'ecc_set_type ecc_sets[];' */
|
---|
| 2000 | int sig = 0; /* valitade signature */
|
---|
| 2001 | int key = 0; /* validate key */
|
---|
| 2002 |
|
---|
| 2003 | (void)oid;
|
---|
| 2004 | (void)octets;
|
---|
| 2005 |
|
---|
| 2006 | if (!extension)
|
---|
| 2007 | return 1; /* no suite restriction */
|
---|
| 2008 |
|
---|
| 2009 | for (curve = extension->data; curve && !(sig && key); curve = curve->next) {
|
---|
| 2010 |
|
---|
| 2011 | switch (curve->name) {
|
---|
| 2012 | #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160)
|
---|
| 2013 | case WOLFSSL_ECC_SECP160R1: oid = ECC_160R1; octets = 20; break;
|
---|
| 2014 | #endif
|
---|
| 2015 | #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192)
|
---|
| 2016 | case WOLFSSL_ECC_SECP192R1: oid = ECC_192R1; octets = 24; break;
|
---|
| 2017 | #endif
|
---|
| 2018 | #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224)
|
---|
| 2019 | case WOLFSSL_ECC_SECP224R1: oid = ECC_224R1; octets = 28; break;
|
---|
| 2020 | #endif
|
---|
| 2021 | #if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256)
|
---|
| 2022 | case WOLFSSL_ECC_SECP256R1: oid = ECC_256R1; octets = 32; break;
|
---|
| 2023 | #endif
|
---|
| 2024 | #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384)
|
---|
| 2025 | case WOLFSSL_ECC_SECP384R1: oid = ECC_384R1; octets = 48; break;
|
---|
| 2026 | #endif
|
---|
| 2027 | #if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521)
|
---|
| 2028 | case WOLFSSL_ECC_SECP521R1: oid = ECC_521R1; octets = 66; break;
|
---|
| 2029 | #endif
|
---|
| 2030 | default: continue; /* unsupported curve */
|
---|
| 2031 | }
|
---|
| 2032 |
|
---|
| 2033 | switch (second) {
|
---|
| 2034 | #ifndef NO_DSA
|
---|
| 2035 | /* ECDHE_ECDSA */
|
---|
| 2036 | case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA:
|
---|
| 2037 | case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA:
|
---|
| 2038 | case TLS_ECDHE_ECDSA_WITH_RC4_128_SHA:
|
---|
| 2039 | case TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA:
|
---|
| 2040 | case TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256:
|
---|
| 2041 | case TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384:
|
---|
| 2042 | case TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256:
|
---|
| 2043 | case TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384:
|
---|
| 2044 | case TLS_ECDHE_ECDSA_WITH_AES_128_CCM_8:
|
---|
| 2045 | case TLS_ECDHE_ECDSA_WITH_AES_256_CCM_8:
|
---|
| 2046 | sig |= ssl->pkCurveOID == oid;
|
---|
| 2047 | key |= ssl->eccTempKeySz == octets;
|
---|
| 2048 | break;
|
---|
| 2049 |
|
---|
| 2050 | /* ECDH_ECDSA */
|
---|
| 2051 | case TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA:
|
---|
| 2052 | case TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA:
|
---|
| 2053 | case TLS_ECDH_ECDSA_WITH_RC4_128_SHA:
|
---|
| 2054 | case TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA:
|
---|
| 2055 | case TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256:
|
---|
| 2056 | case TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA384:
|
---|
| 2057 | case TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256:
|
---|
| 2058 | case TLS_ECDH_ECDSA_WITH_AES_256_GCM_SHA384:
|
---|
| 2059 | sig |= ssl->pkCurveOID == oid;
|
---|
| 2060 | key |= ssl->pkCurveOID == oid;
|
---|
| 2061 | break;
|
---|
| 2062 | #endif
|
---|
| 2063 | #ifndef NO_RSA
|
---|
| 2064 | /* ECDHE_RSA */
|
---|
| 2065 | case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA:
|
---|
| 2066 | case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA:
|
---|
| 2067 | case TLS_ECDHE_RSA_WITH_RC4_128_SHA:
|
---|
| 2068 | case TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA:
|
---|
| 2069 | case TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:
|
---|
| 2070 | case TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384:
|
---|
| 2071 | case TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256:
|
---|
| 2072 | case TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384:
|
---|
| 2073 | sig = 1;
|
---|
| 2074 | key |= ssl->eccTempKeySz == octets;
|
---|
| 2075 | break;
|
---|
| 2076 |
|
---|
| 2077 | /* ECDH_RSA */
|
---|
| 2078 | case TLS_ECDH_RSA_WITH_AES_256_CBC_SHA:
|
---|
| 2079 | case TLS_ECDH_RSA_WITH_AES_128_CBC_SHA:
|
---|
| 2080 | case TLS_ECDH_RSA_WITH_RC4_128_SHA:
|
---|
| 2081 | case TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA:
|
---|
| 2082 | case TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256:
|
---|
| 2083 | case TLS_ECDH_RSA_WITH_AES_256_CBC_SHA384:
|
---|
| 2084 | case TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256:
|
---|
| 2085 | case TLS_ECDH_RSA_WITH_AES_256_GCM_SHA384:
|
---|
| 2086 | sig = 1;
|
---|
| 2087 | key |= ssl->pkCurveOID == oid;
|
---|
| 2088 | break;
|
---|
| 2089 | #endif
|
---|
| 2090 | default:
|
---|
| 2091 | sig = 1;
|
---|
| 2092 | key = 1;
|
---|
| 2093 | break;
|
---|
| 2094 | }
|
---|
| 2095 | }
|
---|
| 2096 |
|
---|
| 2097 | return sig && key;
|
---|
| 2098 | }
|
---|
| 2099 |
|
---|
| 2100 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 2101 |
|
---|
| 2102 | int TLSX_UseSupportedCurve(TLSX** extensions, word16 name)
|
---|
| 2103 | {
|
---|
| 2104 | TLSX* extension = TLSX_Find(*extensions, ELLIPTIC_CURVES);
|
---|
| 2105 | EllipticCurve* curve = NULL;
|
---|
| 2106 | int ret = 0;
|
---|
| 2107 |
|
---|
| 2108 | if (extensions == NULL)
|
---|
| 2109 | return BAD_FUNC_ARG;
|
---|
| 2110 |
|
---|
| 2111 | if ((ret = TLSX_EllipticCurve_Append(&curve, name)) != 0)
|
---|
| 2112 | return ret;
|
---|
| 2113 |
|
---|
| 2114 | if (!extension) {
|
---|
| 2115 | if ((ret = TLSX_Push(extensions, ELLIPTIC_CURVES, curve)) != 0) {
|
---|
| 2116 | XFREE(curve, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2117 | return ret;
|
---|
| 2118 | }
|
---|
| 2119 | }
|
---|
| 2120 | else {
|
---|
| 2121 | /* push new EllipticCurve object to extension data. */
|
---|
| 2122 | curve->next = (EllipticCurve*)extension->data;
|
---|
| 2123 | extension->data = (void*)curve;
|
---|
| 2124 |
|
---|
| 2125 | /* look for another curve of the same name to remove (replacement) */
|
---|
| 2126 | do {
|
---|
| 2127 | if (curve->next && curve->next->name == name) {
|
---|
| 2128 | EllipticCurve *next = curve->next;
|
---|
| 2129 |
|
---|
| 2130 | curve->next = next->next;
|
---|
| 2131 | XFREE(next, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2132 |
|
---|
| 2133 | break;
|
---|
| 2134 | }
|
---|
| 2135 | } while ((curve = curve->next));
|
---|
| 2136 | }
|
---|
| 2137 |
|
---|
| 2138 | return SSL_SUCCESS;
|
---|
| 2139 | }
|
---|
| 2140 |
|
---|
| 2141 | #define EC_FREE_ALL TLSX_EllipticCurve_FreeAll
|
---|
| 2142 | #define EC_VALIDATE_REQUEST TLSX_EllipticCurve_ValidateRequest
|
---|
| 2143 |
|
---|
| 2144 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 2145 | #define EC_GET_SIZE TLSX_EllipticCurve_GetSize
|
---|
| 2146 | #define EC_WRITE TLSX_EllipticCurve_Write
|
---|
| 2147 | #else
|
---|
| 2148 | #define EC_GET_SIZE(list) 0
|
---|
| 2149 | #define EC_WRITE(a, b) 0
|
---|
| 2150 | #endif
|
---|
| 2151 |
|
---|
| 2152 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 2153 | #define EC_PARSE TLSX_EllipticCurve_Parse
|
---|
| 2154 | #else
|
---|
| 2155 | #define EC_PARSE(a, b, c, d) 0
|
---|
| 2156 | #endif
|
---|
| 2157 |
|
---|
| 2158 | #else
|
---|
| 2159 |
|
---|
| 2160 | #define EC_FREE_ALL(list)
|
---|
| 2161 | #define EC_GET_SIZE(list) 0
|
---|
| 2162 | #define EC_WRITE(a, b) 0
|
---|
| 2163 | #define EC_PARSE(a, b, c, d) 0
|
---|
| 2164 | #define EC_VALIDATE_REQUEST(a, b)
|
---|
| 2165 |
|
---|
| 2166 | #endif /* HAVE_SUPPORTED_CURVES */
|
---|
| 2167 |
|
---|
| 2168 | #ifdef HAVE_SECURE_RENEGOTIATION
|
---|
| 2169 |
|
---|
| 2170 | static byte TLSX_SecureRenegotiation_GetSize(SecureRenegotiation* data,
|
---|
| 2171 | int isRequest)
|
---|
| 2172 | {
|
---|
| 2173 | byte length = OPAQUE8_LEN; /* empty info length */
|
---|
| 2174 |
|
---|
| 2175 | if (data->enabled) {
|
---|
| 2176 | /* client sends client_verify_data only */
|
---|
| 2177 | length += TLS_FINISHED_SZ;
|
---|
| 2178 |
|
---|
| 2179 | /* server also sends server_verify_data */
|
---|
| 2180 | if (!isRequest)
|
---|
| 2181 | length += TLS_FINISHED_SZ;
|
---|
| 2182 | }
|
---|
| 2183 |
|
---|
| 2184 | return length;
|
---|
| 2185 | }
|
---|
| 2186 |
|
---|
| 2187 | static word16 TLSX_SecureRenegotiation_Write(SecureRenegotiation* data,
|
---|
| 2188 | byte* output, int isRequest)
|
---|
| 2189 | {
|
---|
| 2190 | word16 offset = OPAQUE8_LEN; /* RenegotiationInfo length */
|
---|
| 2191 |
|
---|
| 2192 | if (data->enabled) {
|
---|
| 2193 | /* client sends client_verify_data only */
|
---|
| 2194 | XMEMCPY(output + offset, data->client_verify_data, TLS_FINISHED_SZ);
|
---|
| 2195 | offset += TLS_FINISHED_SZ;
|
---|
| 2196 |
|
---|
| 2197 | /* server also sends server_verify_data */
|
---|
| 2198 | if (!isRequest) {
|
---|
| 2199 | XMEMCPY(output + offset, data->server_verify_data, TLS_FINISHED_SZ);
|
---|
| 2200 | offset += TLS_FINISHED_SZ;
|
---|
| 2201 | }
|
---|
| 2202 | }
|
---|
| 2203 |
|
---|
| 2204 | output[0] = offset - 1; /* info length - self */
|
---|
| 2205 |
|
---|
| 2206 | return offset;
|
---|
| 2207 | }
|
---|
| 2208 |
|
---|
| 2209 | static int TLSX_SecureRenegotiation_Parse(WOLFSSL* ssl, byte* input,
|
---|
| 2210 | word16 length, byte isRequest)
|
---|
| 2211 | {
|
---|
| 2212 | int ret = SECURE_RENEGOTIATION_E;
|
---|
| 2213 |
|
---|
| 2214 | if (length >= OPAQUE8_LEN) {
|
---|
| 2215 | if (ssl->secure_renegotiation == NULL) {
|
---|
| 2216 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 2217 | if (isRequest && *input == 0) {
|
---|
| 2218 | ret = 0; /* don't reply, user didn't enable */
|
---|
| 2219 | }
|
---|
| 2220 | #endif
|
---|
| 2221 | }
|
---|
| 2222 | else if (isRequest) {
|
---|
| 2223 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 2224 | if (*input == TLS_FINISHED_SZ) {
|
---|
| 2225 | /* TODO compare client_verify_data */
|
---|
| 2226 | ret = 0;
|
---|
| 2227 | }
|
---|
| 2228 | #endif
|
---|
| 2229 | }
|
---|
| 2230 | else {
|
---|
| 2231 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 2232 | if (!ssl->secure_renegotiation->enabled) {
|
---|
| 2233 | if (*input == 0) {
|
---|
| 2234 | ssl->secure_renegotiation->enabled = 1;
|
---|
| 2235 | ret = 0;
|
---|
| 2236 | }
|
---|
| 2237 | }
|
---|
| 2238 | else if (*input == 2 * TLS_FINISHED_SZ) {
|
---|
| 2239 | /* TODO compare client_verify_data and server_verify_data */
|
---|
| 2240 | ret = 0;
|
---|
| 2241 | }
|
---|
| 2242 | #endif
|
---|
| 2243 | }
|
---|
| 2244 | }
|
---|
| 2245 |
|
---|
| 2246 | if (ret != 0) {
|
---|
| 2247 | /* TODO: turn on fatal error at ssl level too */
|
---|
| 2248 | SendAlert(ssl, alert_fatal, handshake_failure);
|
---|
| 2249 | }
|
---|
| 2250 |
|
---|
| 2251 | return ret;
|
---|
| 2252 | }
|
---|
| 2253 |
|
---|
| 2254 | int TLSX_UseSecureRenegotiation(TLSX** extensions)
|
---|
| 2255 | {
|
---|
| 2256 | int ret = 0;
|
---|
| 2257 | SecureRenegotiation* data = NULL;
|
---|
| 2258 |
|
---|
| 2259 | data = (SecureRenegotiation*)XMALLOC(sizeof(SecureRenegotiation), NULL,
|
---|
| 2260 | DYNAMIC_TYPE_TLSX);
|
---|
| 2261 | if (data == NULL)
|
---|
| 2262 | return MEMORY_E;
|
---|
| 2263 |
|
---|
| 2264 | XMEMSET(data, 0, sizeof(SecureRenegotiation));
|
---|
| 2265 |
|
---|
| 2266 | ret = TLSX_Push(extensions, SECURE_RENEGOTIATION, data);
|
---|
| 2267 | if (ret != 0) {
|
---|
| 2268 | XFREE(data, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2269 | return ret;
|
---|
| 2270 | }
|
---|
| 2271 |
|
---|
| 2272 | return SSL_SUCCESS;
|
---|
| 2273 | }
|
---|
| 2274 |
|
---|
| 2275 |
|
---|
| 2276 | #define SCR_FREE_ALL(data) XFREE(data, NULL, DYNAMIC_TYPE_TLSX)
|
---|
| 2277 | #define SCR_GET_SIZE TLSX_SecureRenegotiation_GetSize
|
---|
| 2278 | #define SCR_WRITE TLSX_SecureRenegotiation_Write
|
---|
| 2279 | #define SCR_PARSE TLSX_SecureRenegotiation_Parse
|
---|
| 2280 |
|
---|
| 2281 | #else
|
---|
| 2282 |
|
---|
| 2283 | #define SCR_FREE_ALL(a)
|
---|
| 2284 | #define SCR_GET_SIZE(a, b) 0
|
---|
| 2285 | #define SCR_WRITE(a, b, c) 0
|
---|
| 2286 | #define SCR_PARSE(a, b, c, d) 0
|
---|
| 2287 |
|
---|
| 2288 | #endif /* HAVE_SECURE_RENEGOTIATION */
|
---|
| 2289 |
|
---|
| 2290 | #ifdef HAVE_SESSION_TICKET
|
---|
| 2291 |
|
---|
| 2292 | static void TLSX_SessionTicket_ValidateRequest(WOLFSSL* ssl)
|
---|
| 2293 | {
|
---|
| 2294 | TLSX* extension = TLSX_Find(ssl->extensions, SESSION_TICKET);
|
---|
| 2295 | SessionTicket* ticket = extension ? extension->data : NULL;
|
---|
| 2296 |
|
---|
| 2297 | if (ticket) {
|
---|
| 2298 | /* TODO validate ticket timeout here! */
|
---|
| 2299 | if (ticket->lifetime == 0xfffffff) {
|
---|
| 2300 | /* send empty ticket on timeout */
|
---|
| 2301 | TLSX_UseSessionTicket(&ssl->extensions, NULL);
|
---|
| 2302 | }
|
---|
| 2303 | }
|
---|
| 2304 | }
|
---|
| 2305 |
|
---|
| 2306 |
|
---|
| 2307 | static word16 TLSX_SessionTicket_GetSize(SessionTicket* ticket, int isRequest)
|
---|
| 2308 | {
|
---|
| 2309 | (void)isRequest;
|
---|
| 2310 | return ticket ? ticket->size : 0;
|
---|
| 2311 | }
|
---|
| 2312 |
|
---|
| 2313 | static word16 TLSX_SessionTicket_Write(SessionTicket* ticket, byte* output,
|
---|
| 2314 | int isRequest)
|
---|
| 2315 | {
|
---|
| 2316 | word16 offset = 0; /* empty ticket */
|
---|
| 2317 |
|
---|
| 2318 | if (isRequest && ticket) {
|
---|
| 2319 | XMEMCPY(output + offset, ticket->data, ticket->size);
|
---|
| 2320 | offset += ticket->size;
|
---|
| 2321 | }
|
---|
| 2322 |
|
---|
| 2323 | return offset;
|
---|
| 2324 | }
|
---|
| 2325 |
|
---|
| 2326 |
|
---|
| 2327 | static int TLSX_SessionTicket_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 2328 | byte isRequest)
|
---|
| 2329 | {
|
---|
| 2330 | int ret = 0;
|
---|
| 2331 |
|
---|
| 2332 | if (!isRequest) {
|
---|
| 2333 | /* client side */
|
---|
| 2334 | if (length != 0)
|
---|
| 2335 | return BUFFER_ERROR;
|
---|
| 2336 |
|
---|
| 2337 | ssl->expect_session_ticket = 1;
|
---|
| 2338 | }
|
---|
| 2339 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 2340 | else {
|
---|
| 2341 | /* server side */
|
---|
| 2342 | if (ssl->ctx->ticketEncCb == NULL) {
|
---|
| 2343 | WOLFSSL_MSG("Client sent session ticket, server has no callback");
|
---|
| 2344 | return 0;
|
---|
| 2345 | }
|
---|
| 2346 |
|
---|
| 2347 | if (length == 0) {
|
---|
| 2348 | /* blank ticket */
|
---|
| 2349 | ret = TLSX_UseSessionTicket(&ssl->extensions, NULL);
|
---|
| 2350 | if (ret == SSL_SUCCESS) {
|
---|
| 2351 | ret = 0;
|
---|
| 2352 | TLSX_SetResponse(ssl, SESSION_TICKET); /* send blank ticket */
|
---|
| 2353 | ssl->options.createTicket = 1; /* will send ticket msg */
|
---|
| 2354 | ssl->options.useTicket = 1;
|
---|
| 2355 | }
|
---|
| 2356 | } else {
|
---|
| 2357 | /* got actual ticket from client */
|
---|
| 2358 | ret = DoClientTicket(ssl, input, length);
|
---|
| 2359 | if (ret == WOLFSSL_TICKET_RET_OK) { /* use ticket to resume */
|
---|
| 2360 | WOLFSSL_MSG("Using exisitng client ticket");
|
---|
| 2361 | ssl->options.useTicket = 1;
|
---|
| 2362 | ssl->options.resuming = 1;
|
---|
| 2363 | } else if (ret == WOLFSSL_TICKET_RET_CREATE) {
|
---|
| 2364 | WOLFSSL_MSG("Using existing client ticket, creating new one");
|
---|
| 2365 | ret = TLSX_UseSessionTicket(&ssl->extensions, NULL);
|
---|
| 2366 | if (ret == SSL_SUCCESS) {
|
---|
| 2367 | ret = 0;
|
---|
| 2368 | TLSX_SetResponse(ssl, SESSION_TICKET);
|
---|
| 2369 | /* send blank ticket */
|
---|
| 2370 | ssl->options.createTicket = 1; /* will send ticket msg */
|
---|
| 2371 | ssl->options.useTicket = 1;
|
---|
| 2372 | ssl->options.resuming = 1;
|
---|
| 2373 | }
|
---|
| 2374 | } else if (ret == WOLFSSL_TICKET_RET_REJECT) {
|
---|
| 2375 | WOLFSSL_MSG("Process client ticket rejected, not using");
|
---|
| 2376 | ret = 0; /* not fatal */
|
---|
| 2377 | } else if (ret == WOLFSSL_TICKET_RET_FATAL || ret < 0) {
|
---|
| 2378 | WOLFSSL_MSG("Process client ticket fatal error, not using");
|
---|
| 2379 | }
|
---|
| 2380 | }
|
---|
| 2381 | }
|
---|
| 2382 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 2383 |
|
---|
| 2384 | return ret;
|
---|
| 2385 | }
|
---|
| 2386 |
|
---|
| 2387 | WOLFSSL_LOCAL SessionTicket* TLSX_SessionTicket_Create(word32 lifetime,
|
---|
| 2388 | byte* data, word16 size)
|
---|
| 2389 | {
|
---|
| 2390 | SessionTicket* ticket = (SessionTicket*)XMALLOC(sizeof(SessionTicket),
|
---|
| 2391 | NULL, DYNAMIC_TYPE_TLSX);
|
---|
| 2392 | if (ticket) {
|
---|
| 2393 | ticket->data = (byte*)XMALLOC(size, NULL, DYNAMIC_TYPE_TLSX);
|
---|
| 2394 | if (ticket->data == NULL) {
|
---|
| 2395 | XFREE(ticket, NULL, DYNAMIC_TYPE_TLSX);
|
---|
| 2396 | return NULL;
|
---|
| 2397 | }
|
---|
| 2398 |
|
---|
| 2399 | XMEMCPY(ticket->data, data, size);
|
---|
| 2400 | ticket->size = size;
|
---|
| 2401 | ticket->lifetime = lifetime;
|
---|
| 2402 | }
|
---|
| 2403 |
|
---|
| 2404 | return ticket;
|
---|
| 2405 | }
|
---|
| 2406 | WOLFSSL_LOCAL void TLSX_SessionTicket_Free(SessionTicket* ticket)
|
---|
| 2407 | {
|
---|
| 2408 | if (ticket) {
|
---|
| 2409 | XFREE(ticket->data, NULL, DYNAMIC_TYPE_TLSX);
|
---|
| 2410 | XFREE(ticket, NULL, DYNAMIC_TYPE_TLSX);
|
---|
| 2411 | }
|
---|
| 2412 | }
|
---|
| 2413 |
|
---|
| 2414 | int TLSX_UseSessionTicket(TLSX** extensions, SessionTicket* ticket)
|
---|
| 2415 | {
|
---|
| 2416 | int ret = 0;
|
---|
| 2417 |
|
---|
| 2418 | if (extensions == NULL)
|
---|
| 2419 | return BAD_FUNC_ARG;
|
---|
| 2420 |
|
---|
| 2421 | /* If the ticket is NULL, the client will request a new ticket from the
|
---|
| 2422 | server. Otherwise, the client will use it in the next client hello. */
|
---|
| 2423 | if ((ret = TLSX_Push(extensions, SESSION_TICKET, (void*)ticket)) != 0)
|
---|
| 2424 | return ret;
|
---|
| 2425 |
|
---|
| 2426 | return SSL_SUCCESS;
|
---|
| 2427 | }
|
---|
| 2428 |
|
---|
| 2429 | #define STK_VALIDATE_REQUEST TLSX_SessionTicket_ValidateRequest
|
---|
| 2430 | #define STK_GET_SIZE TLSX_SessionTicket_GetSize
|
---|
| 2431 | #define STK_WRITE TLSX_SessionTicket_Write
|
---|
| 2432 | #define STK_PARSE TLSX_SessionTicket_Parse
|
---|
| 2433 |
|
---|
| 2434 | #else
|
---|
| 2435 |
|
---|
| 2436 | #define STK_VALIDATE_REQUEST(a)
|
---|
| 2437 | #define STK_GET_SIZE(a, b) 0
|
---|
| 2438 | #define STK_WRITE(a, b, c) 0
|
---|
| 2439 | #define STK_PARSE(a, b, c, d) 0
|
---|
| 2440 |
|
---|
| 2441 | #endif /* HAVE_SESSION_TICKET */
|
---|
| 2442 |
|
---|
| 2443 |
|
---|
| 2444 | #ifdef HAVE_QSH
|
---|
| 2445 | static WC_RNG* rng;
|
---|
| 2446 | static wolfSSL_Mutex* rngMutex;
|
---|
| 2447 |
|
---|
| 2448 | static void TLSX_QSH_FreeAll(QSHScheme* list)
|
---|
| 2449 | {
|
---|
| 2450 | QSHScheme* current;
|
---|
| 2451 |
|
---|
| 2452 | while ((current = list)) {
|
---|
| 2453 | list = current->next;
|
---|
| 2454 | XFREE(current, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2455 | }
|
---|
| 2456 | }
|
---|
| 2457 |
|
---|
| 2458 | static int TLSX_QSH_Append(QSHScheme** list, word16 name, byte* pub,
|
---|
| 2459 | word16 pubLen)
|
---|
| 2460 | {
|
---|
| 2461 | QSHScheme* temp;
|
---|
| 2462 |
|
---|
| 2463 | if (list == NULL)
|
---|
| 2464 | return BAD_FUNC_ARG;
|
---|
| 2465 |
|
---|
| 2466 | if ((temp = XMALLOC(sizeof(QSHScheme), 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 2467 | return MEMORY_E;
|
---|
| 2468 |
|
---|
| 2469 | temp->name = name;
|
---|
| 2470 | temp->PK = pub;
|
---|
| 2471 | temp->PKLen = pubLen;
|
---|
| 2472 | temp->next = *list;
|
---|
| 2473 |
|
---|
| 2474 | *list = temp;
|
---|
| 2475 |
|
---|
| 2476 | return 0;
|
---|
| 2477 | }
|
---|
| 2478 |
|
---|
| 2479 |
|
---|
| 2480 | /* request for server's public key : 02 indicates 0-2 requested */
|
---|
| 2481 | static byte TLSX_QSH_SerPKReq(byte* output, byte isRequest)
|
---|
| 2482 | {
|
---|
| 2483 | if (isRequest) {
|
---|
| 2484 | /* only request one public key from the server */
|
---|
| 2485 | output[0] = 0x01;
|
---|
| 2486 |
|
---|
| 2487 | return OPAQUE8_LEN;
|
---|
| 2488 | }
|
---|
| 2489 | else {
|
---|
| 2490 | return 0;
|
---|
| 2491 | }
|
---|
| 2492 | }
|
---|
| 2493 |
|
---|
| 2494 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 2495 |
|
---|
| 2496 | /* check for TLS_QSH suite */
|
---|
| 2497 | static void TLSX_QSH_ValidateRequest(WOLFSSL* ssl, byte* semaphore)
|
---|
| 2498 | {
|
---|
| 2499 | int i;
|
---|
| 2500 |
|
---|
| 2501 | for (i = 0; i < ssl->suites->suiteSz; i+= 2)
|
---|
| 2502 | if (ssl->suites->suites[i] == QSH_BYTE)
|
---|
| 2503 | return;
|
---|
| 2504 |
|
---|
| 2505 | /* No QSH suite found */
|
---|
| 2506 | TURN_ON(semaphore, TLSX_ToSemaphore(WOLFSSL_QSH));
|
---|
| 2507 | }
|
---|
| 2508 |
|
---|
| 2509 |
|
---|
| 2510 | /* return the size of the QSH hello extension
|
---|
| 2511 | list the list of QSHScheme structs containing id and key
|
---|
| 2512 | isRequest if 1 then is being sent to the server
|
---|
| 2513 | */
|
---|
| 2514 | word16 TLSX_QSH_GetSize(QSHScheme* list, byte isRequest)
|
---|
| 2515 | {
|
---|
| 2516 | QSHScheme* temp = list;
|
---|
| 2517 | word16 length = 0;
|
---|
| 2518 |
|
---|
| 2519 | /* account for size of scheme list and public key list */
|
---|
| 2520 | if (isRequest)
|
---|
| 2521 | length = OPAQUE16_LEN;
|
---|
| 2522 | length += OPAQUE24_LEN;
|
---|
| 2523 |
|
---|
| 2524 | /* for each non null element in list add size */
|
---|
| 2525 | while ((temp)) {
|
---|
| 2526 | /* add public key info Scheme | Key Length | Key */
|
---|
| 2527 | length += OPAQUE16_LEN;
|
---|
| 2528 | length += OPAQUE16_LEN;
|
---|
| 2529 | length += temp->PKLen;
|
---|
| 2530 |
|
---|
| 2531 | /* if client add name size for scheme list
|
---|
| 2532 | advance to next QSHScheme struct in list */
|
---|
| 2533 | if (isRequest)
|
---|
| 2534 | length += OPAQUE16_LEN;
|
---|
| 2535 | temp = temp->next;
|
---|
| 2536 | }
|
---|
| 2537 |
|
---|
| 2538 | /* add length for request server public keys */
|
---|
| 2539 | if (isRequest)
|
---|
| 2540 | length += OPAQUE8_LEN;
|
---|
| 2541 |
|
---|
| 2542 | return length;
|
---|
| 2543 | }
|
---|
| 2544 |
|
---|
| 2545 |
|
---|
| 2546 | /* write out a list of QSHScheme IDs */
|
---|
| 2547 | static word16 TLSX_QSH_Write(QSHScheme* list, byte* output)
|
---|
| 2548 | {
|
---|
| 2549 | QSHScheme* current = list;
|
---|
| 2550 | word16 length = 0;
|
---|
| 2551 |
|
---|
| 2552 | length += OPAQUE16_LEN;
|
---|
| 2553 |
|
---|
| 2554 | while (current) {
|
---|
| 2555 | c16toa(current->name, output + length);
|
---|
| 2556 | length += OPAQUE16_LEN;
|
---|
| 2557 | current = (QSHScheme*)current->next;
|
---|
| 2558 | }
|
---|
| 2559 |
|
---|
| 2560 | c16toa(length - OPAQUE16_LEN, output); /* writing list length */
|
---|
| 2561 |
|
---|
| 2562 | return length;
|
---|
| 2563 | }
|
---|
| 2564 |
|
---|
| 2565 |
|
---|
| 2566 | /* write public key list in extension */
|
---|
| 2567 | static word16 TLSX_QSHPK_WriteR(QSHScheme* format, byte* output);
|
---|
| 2568 | static word16 TLSX_QSHPK_WriteR(QSHScheme* format, byte* output)
|
---|
| 2569 | {
|
---|
| 2570 | word32 offset = 0;
|
---|
| 2571 | word16 public_len = 0;
|
---|
| 2572 |
|
---|
| 2573 | if (!format)
|
---|
| 2574 | return offset;
|
---|
| 2575 |
|
---|
| 2576 | /* write scheme ID */
|
---|
| 2577 | c16toa(format->name, output + offset);
|
---|
| 2578 | offset += OPAQUE16_LEN;
|
---|
| 2579 |
|
---|
| 2580 | /* write public key matching scheme */
|
---|
| 2581 | public_len = format->PKLen;
|
---|
| 2582 | c16toa(public_len, output + offset);
|
---|
| 2583 | offset += OPAQUE16_LEN;
|
---|
| 2584 | if (format->PK) {
|
---|
| 2585 | XMEMCPY(output+offset, format->PK, public_len);
|
---|
| 2586 | }
|
---|
| 2587 |
|
---|
| 2588 | return public_len + offset;
|
---|
| 2589 | }
|
---|
| 2590 |
|
---|
| 2591 | word16 TLSX_QSHPK_Write(QSHScheme* list, byte* output)
|
---|
| 2592 | {
|
---|
| 2593 | QSHScheme* current = list;
|
---|
| 2594 | word32 length = 0;
|
---|
| 2595 | word24 toWire;
|
---|
| 2596 |
|
---|
| 2597 | length += OPAQUE24_LEN;
|
---|
| 2598 |
|
---|
| 2599 | while (current) {
|
---|
| 2600 | length += TLSX_QSHPK_WriteR(current, output + length);
|
---|
| 2601 | current = (QSHScheme*)current->next;
|
---|
| 2602 | }
|
---|
| 2603 | /* length of public keys sent */
|
---|
| 2604 | c32to24(length - OPAQUE24_LEN, toWire);
|
---|
| 2605 | output[0] = toWire[0];
|
---|
| 2606 | output[1] = toWire[1];
|
---|
| 2607 | output[2] = toWire[2];
|
---|
| 2608 |
|
---|
| 2609 | return length;
|
---|
| 2610 | }
|
---|
| 2611 |
|
---|
| 2612 | #endif /* NO_WOLFSSL_CLIENT */
|
---|
| 2613 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 2614 |
|
---|
| 2615 | static void TLSX_QSHAgreement(TLSX** extensions)
|
---|
| 2616 | {
|
---|
| 2617 | TLSX* extension = TLSX_Find(*extensions, WOLFSSL_QSH);
|
---|
| 2618 | QSHScheme* format = NULL;
|
---|
| 2619 | QSHScheme* delete = NULL;
|
---|
| 2620 | QSHScheme* prev = NULL;
|
---|
| 2621 |
|
---|
| 2622 | if (extension == NULL)
|
---|
| 2623 | return;
|
---|
| 2624 |
|
---|
| 2625 | format = extension->data;
|
---|
| 2626 | while (format) {
|
---|
| 2627 | if (format->PKLen == 0) {
|
---|
| 2628 | /* case of head */
|
---|
| 2629 | if (format == extension->data) {
|
---|
| 2630 | extension->data = format->next;
|
---|
| 2631 | }
|
---|
| 2632 | if (prev)
|
---|
| 2633 | prev->next = format->next;
|
---|
| 2634 | delete = format;
|
---|
| 2635 | format = format->next;
|
---|
| 2636 | XFREE(delete, 0, DYNAMIC_TYPE_TMP_ARRAY);
|
---|
| 2637 | delete = NULL;
|
---|
| 2638 | } else {
|
---|
| 2639 | prev = format;
|
---|
| 2640 | format = format->next;
|
---|
| 2641 | }
|
---|
| 2642 | }
|
---|
| 2643 | }
|
---|
| 2644 |
|
---|
| 2645 |
|
---|
| 2646 | /* Parse in hello extension
|
---|
| 2647 | input the byte stream to process
|
---|
| 2648 | length length of total extension found
|
---|
| 2649 | isRequest set to 1 if being sent to the server
|
---|
| 2650 | */
|
---|
| 2651 | static int TLSX_QSH_Parse(WOLFSSL* ssl, byte* input, word16 length,
|
---|
| 2652 | byte isRequest)
|
---|
| 2653 | {
|
---|
| 2654 | byte numKeys = 0;
|
---|
| 2655 | word16 offset = 0;
|
---|
| 2656 | word16 schemSz = 0;
|
---|
| 2657 | word16 offset_len = 0;
|
---|
| 2658 | word32 offset_pk = 0;
|
---|
| 2659 | word16 name = 0;
|
---|
| 2660 | word16 PKLen = 0;
|
---|
| 2661 | byte* PK = NULL;
|
---|
| 2662 | int r;
|
---|
| 2663 |
|
---|
| 2664 |
|
---|
| 2665 | if (OPAQUE16_LEN > length)
|
---|
| 2666 | return BUFFER_ERROR;
|
---|
| 2667 |
|
---|
| 2668 | if (isRequest) {
|
---|
| 2669 | ato16(input, &schemSz);
|
---|
| 2670 |
|
---|
| 2671 | /* list of public keys avialable for QSH schemes */
|
---|
| 2672 | offset_len = schemSz + OPAQUE16_LEN;
|
---|
| 2673 | }
|
---|
| 2674 |
|
---|
| 2675 | offset_pk = ((input[offset_len] << 16) & 0xFF00000) |
|
---|
| 2676 | (((input[offset_len + 1]) << 8) & 0xFF00) |
|
---|
| 2677 | (input[offset_len + 2] & 0xFF);
|
---|
| 2678 | offset_len += OPAQUE24_LEN;
|
---|
| 2679 |
|
---|
| 2680 | /* check buffer size */
|
---|
| 2681 | if (offset_pk > length)
|
---|
| 2682 | return BUFFER_ERROR;
|
---|
| 2683 |
|
---|
| 2684 | /* set maximum number of keys the client will accept */
|
---|
| 2685 | if (!isRequest)
|
---|
| 2686 | numKeys = (ssl->maxRequest < 1)? 1 : ssl->maxRequest;
|
---|
| 2687 |
|
---|
| 2688 | /* hello extension read list of scheme ids */
|
---|
| 2689 | if (isRequest) {
|
---|
| 2690 |
|
---|
| 2691 | /* read in request for public keys */
|
---|
| 2692 | ssl->minRequest = (input[length -1] >> 4) & 0xFF;
|
---|
| 2693 | ssl->maxRequest = input[length -1] & 0x0F;
|
---|
| 2694 |
|
---|
| 2695 | /* choose the min between min requested by client and 1 */
|
---|
| 2696 | numKeys = (ssl->minRequest > 1) ? ssl->minRequest : 1;
|
---|
| 2697 |
|
---|
| 2698 | if (ssl->minRequest > ssl->maxRequest)
|
---|
| 2699 | return BAD_FUNC_ARG;
|
---|
| 2700 |
|
---|
| 2701 | offset += OPAQUE16_LEN;
|
---|
| 2702 | schemSz += offset;
|
---|
| 2703 |
|
---|
| 2704 | /* check buffer size */
|
---|
| 2705 | if (schemSz > length)
|
---|
| 2706 | return BUFFER_ERROR;
|
---|
| 2707 |
|
---|
| 2708 | while ((offset < schemSz) && numKeys) {
|
---|
| 2709 | /* Scheme ID list */
|
---|
| 2710 | ato16(input + offset, &name);
|
---|
| 2711 | offset += OPAQUE16_LEN;
|
---|
| 2712 |
|
---|
| 2713 | /* validate we have scheme id */
|
---|
| 2714 | if (ssl->user_set_QSHSchemes &&
|
---|
| 2715 | !TLSX_ValidateQSHScheme(&ssl->extensions, name)) {
|
---|
| 2716 | continue;
|
---|
| 2717 | }
|
---|
| 2718 |
|
---|
| 2719 | /* server create keys on demand */
|
---|
| 2720 | if ((r = TLSX_CreateNtruKey(ssl, name)) != 0) {
|
---|
| 2721 | WOLFSSL_MSG("Error creating ntru keys");
|
---|
| 2722 | return r;
|
---|
| 2723 | }
|
---|
| 2724 |
|
---|
| 2725 | /* peer sent an agreed upon scheme */
|
---|
| 2726 | r = TLSX_UseQSHScheme(&ssl->extensions, name, NULL, 0);
|
---|
| 2727 |
|
---|
| 2728 | if (r != SSL_SUCCESS) return r; /* throw error */
|
---|
| 2729 |
|
---|
| 2730 | numKeys--;
|
---|
| 2731 | }
|
---|
| 2732 |
|
---|
| 2733 | /* choose the min between min requested by client and 1 */
|
---|
| 2734 | numKeys = (ssl->minRequest > 1) ? ssl->minRequest : 1;
|
---|
| 2735 | }
|
---|
| 2736 |
|
---|
| 2737 | /* QSHPK struct */
|
---|
| 2738 | offset_pk += offset_len;
|
---|
| 2739 | while ((offset_len < offset_pk) && numKeys) {
|
---|
| 2740 | QSHKey * temp;
|
---|
| 2741 |
|
---|
| 2742 | if ((temp = XMALLOC(sizeof(QSHKey), 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 2743 | return MEMORY_E;
|
---|
| 2744 |
|
---|
| 2745 | /* initialize */
|
---|
| 2746 | temp->next = NULL;
|
---|
| 2747 | temp->pub.buffer = NULL;
|
---|
| 2748 | temp->pub.length = 0;
|
---|
| 2749 | temp->pri.buffer = NULL;
|
---|
| 2750 | temp->pri.length = 0;
|
---|
| 2751 |
|
---|
| 2752 | /* scheme id */
|
---|
| 2753 | ato16(input + offset_len, &(temp->name));
|
---|
| 2754 | offset_len += OPAQUE16_LEN;
|
---|
| 2755 |
|
---|
| 2756 | /* public key length */
|
---|
| 2757 | ato16(input + offset_len, &PKLen);
|
---|
| 2758 | temp->pub.length = PKLen;
|
---|
| 2759 | offset_len += OPAQUE16_LEN;
|
---|
| 2760 |
|
---|
| 2761 |
|
---|
| 2762 | if (isRequest) {
|
---|
| 2763 | /* validate we have scheme id */
|
---|
| 2764 | if (ssl->user_set_QSHSchemes &&
|
---|
| 2765 | (!TLSX_ValidateQSHScheme(&ssl->extensions, temp->name))) {
|
---|
| 2766 | offset_len += PKLen;
|
---|
| 2767 | XFREE(temp, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2768 | continue;
|
---|
| 2769 | }
|
---|
| 2770 | }
|
---|
| 2771 |
|
---|
| 2772 | /* read in public key */
|
---|
| 2773 | if (PKLen > 0) {
|
---|
| 2774 | temp->pub.buffer = (byte*)XMALLOC(temp->pub.length,
|
---|
| 2775 | 0, DYNAMIC_TYPE_PUBLIC_KEY);
|
---|
| 2776 | XMEMCPY(temp->pub.buffer, input + offset_len, temp->pub.length);
|
---|
| 2777 | offset_len += PKLen;
|
---|
| 2778 | }
|
---|
| 2779 | else {
|
---|
| 2780 | PK = NULL;
|
---|
| 2781 | }
|
---|
| 2782 |
|
---|
| 2783 | /* use own key when adding to extensions list for sending reply */
|
---|
| 2784 | PKLen = 0;
|
---|
| 2785 | PK = TLSX_QSHKeyFind_Pub(ssl->QSH_Key, &PKLen, temp->name);
|
---|
| 2786 | r = TLSX_UseQSHScheme(&ssl->extensions, temp->name, PK, PKLen);
|
---|
| 2787 |
|
---|
| 2788 | /* store peers key */
|
---|
| 2789 | ssl->peerQSHKeyPresent = 1;
|
---|
| 2790 | if (TLSX_AddQSHKey(&ssl->peerQSHKey, temp) != 0)
|
---|
| 2791 | return MEMORY_E;
|
---|
| 2792 |
|
---|
| 2793 | if (temp->pub.length == 0) {
|
---|
| 2794 | XFREE(temp, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2795 | }
|
---|
| 2796 |
|
---|
| 2797 | if (r != SSL_SUCCESS) {return r;} /* throw error */
|
---|
| 2798 |
|
---|
| 2799 | numKeys--;
|
---|
| 2800 | }
|
---|
| 2801 |
|
---|
| 2802 | /* reply to a QSH extension sent from client */
|
---|
| 2803 | if (isRequest) {
|
---|
| 2804 | TLSX_SetResponse(ssl, WOLFSSL_QSH);
|
---|
| 2805 | /* only use schemes we have key generated for -- free the rest */
|
---|
| 2806 | TLSX_QSHAgreement(&ssl->extensions);
|
---|
| 2807 | }
|
---|
| 2808 |
|
---|
| 2809 | return 0;
|
---|
| 2810 | }
|
---|
| 2811 |
|
---|
| 2812 |
|
---|
| 2813 | /* Used for parsing in QSHCipher structs on Key Exchange */
|
---|
| 2814 | int TLSX_QSHCipher_Parse(WOLFSSL* ssl, const byte* input, word16 length,
|
---|
| 2815 | byte isServer)
|
---|
| 2816 | {
|
---|
| 2817 | QSHKey* key;
|
---|
| 2818 | word16 Max_Secret_Len = 48;
|
---|
| 2819 | word16 offset = 0;
|
---|
| 2820 | word16 offset_len = 0;
|
---|
| 2821 | word32 offset_pk = 0;
|
---|
| 2822 | word16 name = 0;
|
---|
| 2823 | word16 secretLen = 0;
|
---|
| 2824 | byte* secret = NULL;
|
---|
| 2825 | word16 buffLen = 0;
|
---|
| 2826 | byte buff[145]; /* size enough for 3 secrets */
|
---|
| 2827 | buffer* buf;
|
---|
| 2828 |
|
---|
| 2829 | /* pointer to location where secret should be stored */
|
---|
| 2830 | if (isServer) {
|
---|
| 2831 | buf = ssl->QSH_secret->CliSi;
|
---|
| 2832 | }
|
---|
| 2833 | else {
|
---|
| 2834 | buf = ssl->QSH_secret->SerSi;
|
---|
| 2835 | }
|
---|
| 2836 |
|
---|
| 2837 | offset_pk = ((input[offset_len] << 16) & 0xFF0000) |
|
---|
| 2838 | (((input[offset_len + 1]) << 8) & 0xFF00) |
|
---|
| 2839 | (input[offset_len + 2] & 0xFF);
|
---|
| 2840 | offset_len += OPAQUE24_LEN;
|
---|
| 2841 |
|
---|
| 2842 | /* validating extension list length -- check if trying to read over edge
|
---|
| 2843 | of buffer */
|
---|
| 2844 | if (length < (offset_pk + OPAQUE24_LEN)) {
|
---|
| 2845 | return BUFFER_ERROR;
|
---|
| 2846 | }
|
---|
| 2847 |
|
---|
| 2848 | /* QSHCipherList struct */
|
---|
| 2849 | offset_pk += offset_len;
|
---|
| 2850 | while (offset_len < offset_pk) {
|
---|
| 2851 |
|
---|
| 2852 | /* scheme id */
|
---|
| 2853 | ato16(input + offset_len, &name);
|
---|
| 2854 | offset_len += OPAQUE16_LEN;
|
---|
| 2855 |
|
---|
| 2856 | /* public key length */
|
---|
| 2857 | ato16(input + offset_len, &secretLen);
|
---|
| 2858 | offset_len += OPAQUE16_LEN;
|
---|
| 2859 |
|
---|
| 2860 | /* read in public key */
|
---|
| 2861 | if (secretLen > 0) {
|
---|
| 2862 | secret = (byte*)(input + offset_len);
|
---|
| 2863 | offset_len += secretLen;
|
---|
| 2864 | }
|
---|
| 2865 | else {
|
---|
| 2866 | secret = NULL;
|
---|
| 2867 | }
|
---|
| 2868 |
|
---|
| 2869 | /* no secret sent */
|
---|
| 2870 | if (secret == NULL)
|
---|
| 2871 | continue;
|
---|
| 2872 |
|
---|
| 2873 | /* find coresponding key */
|
---|
| 2874 | key = ssl->QSH_Key;
|
---|
| 2875 | while (key) {
|
---|
| 2876 | if (key->name == name)
|
---|
| 2877 | break;
|
---|
| 2878 | else
|
---|
| 2879 | key = (QSHKey*)key->next;
|
---|
| 2880 | }
|
---|
| 2881 |
|
---|
| 2882 | /* if we do not have the key than there was a big issue negotiation */
|
---|
| 2883 | if (key == NULL) {
|
---|
| 2884 | WOLFSSL_MSG("key was null for decryption!!!\n");
|
---|
| 2885 | return MEMORY_E;
|
---|
| 2886 | }
|
---|
| 2887 |
|
---|
| 2888 | /* Decrypt sent secret */
|
---|
| 2889 | buffLen = Max_Secret_Len;
|
---|
| 2890 | QSH_Decrypt(key, secret, secretLen, buff + offset, &buffLen);
|
---|
| 2891 | offset += buffLen;
|
---|
| 2892 | }
|
---|
| 2893 |
|
---|
| 2894 | /* allocate memory for buffer */
|
---|
| 2895 | buf->length = offset;
|
---|
| 2896 | buf->buffer = (byte*)XMALLOC(offset, NULL, DYNAMIC_TYPE_TMP_BUFFER);
|
---|
| 2897 | if (buf->buffer == NULL)
|
---|
| 2898 | return MEMORY_E;
|
---|
| 2899 |
|
---|
| 2900 | /* store secrets */
|
---|
| 2901 | XMEMCPY(buf->buffer, buff, offset);
|
---|
| 2902 | ForceZero(buff, offset);
|
---|
| 2903 |
|
---|
| 2904 | return offset_len;
|
---|
| 2905 | }
|
---|
| 2906 |
|
---|
| 2907 |
|
---|
| 2908 | /* return 1 on success */
|
---|
| 2909 | int TLSX_ValidateQSHScheme(TLSX** extensions, word16 theirs) {
|
---|
| 2910 | TLSX* extension = TLSX_Find(*extensions, WOLFSSL_QSH);
|
---|
| 2911 | QSHScheme* format = NULL;
|
---|
| 2912 |
|
---|
| 2913 | /* if no extension is sent then do not use QSH */
|
---|
| 2914 | if (!extension) {
|
---|
| 2915 | WOLFSSL_MSG("No QSH Extension");
|
---|
| 2916 | return 0;
|
---|
| 2917 | }
|
---|
| 2918 |
|
---|
| 2919 | for (format = (QSHScheme*)extension->data; format; format = format->next) {
|
---|
| 2920 | if (format->name == theirs) {
|
---|
| 2921 | WOLFSSL_MSG("Found Matching QSH Scheme");
|
---|
| 2922 | return 1; /* have QSH */
|
---|
| 2923 | }
|
---|
| 2924 | }
|
---|
| 2925 |
|
---|
| 2926 | return 0;
|
---|
| 2927 | }
|
---|
| 2928 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 2929 |
|
---|
| 2930 | /* test if the QSH Scheme is implemented
|
---|
| 2931 | return 1 if yes 0 if no */
|
---|
| 2932 | static int TLSX_HaveQSHScheme(word16 name)
|
---|
| 2933 | {
|
---|
| 2934 | switch(name) {
|
---|
| 2935 | #ifdef HAVE_NTRU
|
---|
| 2936 | case WOLFSSL_NTRU_EESS439:
|
---|
| 2937 | case WOLFSSL_NTRU_EESS593:
|
---|
| 2938 | case WOLFSSL_NTRU_EESS743:
|
---|
| 2939 | return 1;
|
---|
| 2940 | #endif
|
---|
| 2941 | case WOLFSSL_LWE_XXX:
|
---|
| 2942 | case WOLFSSL_HFE_XXX:
|
---|
| 2943 | return 0; /* not supported yet */
|
---|
| 2944 |
|
---|
| 2945 | default:
|
---|
| 2946 | return 0;
|
---|
| 2947 | }
|
---|
| 2948 | }
|
---|
| 2949 |
|
---|
| 2950 |
|
---|
| 2951 | /* Add a QSHScheme struct to list of usable ones */
|
---|
| 2952 | int TLSX_UseQSHScheme(TLSX** extensions, word16 name, byte* pKey, word16 pkeySz)
|
---|
| 2953 | {
|
---|
| 2954 | TLSX* extension = TLSX_Find(*extensions, WOLFSSL_QSH);
|
---|
| 2955 | QSHScheme* format = NULL;
|
---|
| 2956 | int ret = 0;
|
---|
| 2957 |
|
---|
| 2958 | /* sanity check */
|
---|
| 2959 | if (extensions == NULL || (pKey == NULL && pkeySz != 0))
|
---|
| 2960 | return BAD_FUNC_ARG;
|
---|
| 2961 |
|
---|
| 2962 | /* if scheme is implemented than add */
|
---|
| 2963 | if (TLSX_HaveQSHScheme(name)) {
|
---|
| 2964 | if ((ret = TLSX_QSH_Append(&format, name, pKey, pkeySz)) != 0)
|
---|
| 2965 | return ret;
|
---|
| 2966 |
|
---|
| 2967 | if (!extension) {
|
---|
| 2968 | if ((ret = TLSX_Push(extensions, WOLFSSL_QSH, format)) != 0) {
|
---|
| 2969 | XFREE(format, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2970 | return ret;
|
---|
| 2971 | }
|
---|
| 2972 | }
|
---|
| 2973 | else {
|
---|
| 2974 | /* push new QSH object to extension data. */
|
---|
| 2975 | format->next = (QSHScheme*)extension->data;
|
---|
| 2976 | extension->data = (void*)format;
|
---|
| 2977 |
|
---|
| 2978 | /* look for another format of the same name to remove (replacement) */
|
---|
| 2979 | do {
|
---|
| 2980 | if (format->next && (format->next->name == name)) {
|
---|
| 2981 | QSHScheme* next = format->next;
|
---|
| 2982 |
|
---|
| 2983 | format->next = next->next;
|
---|
| 2984 | XFREE(next, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 2985 |
|
---|
| 2986 | break;
|
---|
| 2987 | }
|
---|
| 2988 | } while ((format = format->next));
|
---|
| 2989 | }
|
---|
| 2990 | }
|
---|
| 2991 | return SSL_SUCCESS;
|
---|
| 2992 | }
|
---|
| 2993 |
|
---|
| 2994 | #define QSH_FREE_ALL TLSX_QSH_FreeAll
|
---|
| 2995 | #define QSH_VALIDATE_REQUEST TLSX_QSH_ValidateRequest
|
---|
| 2996 |
|
---|
| 2997 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 2998 | #define QSH_GET_SIZE TLSX_QSH_GetSize
|
---|
| 2999 | #define QSH_WRITE TLSX_QSH_Write
|
---|
| 3000 | #else
|
---|
| 3001 | #define QSH_GET_SIZE(list) 0
|
---|
| 3002 | #define QSH_WRITE(a, b) 0
|
---|
| 3003 | #endif
|
---|
| 3004 |
|
---|
| 3005 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 3006 | #define QSH_PARSE TLSX_QSH_Parse
|
---|
| 3007 | #else
|
---|
| 3008 | #define QSH_PARSE(a, b, c, d) 0
|
---|
| 3009 | #endif
|
---|
| 3010 |
|
---|
| 3011 | #define QSHPK_WRITE TLSX_QSHPK_Write
|
---|
| 3012 | #define QSH_SERREQ TLSX_QSH_SerPKReq
|
---|
| 3013 | #else
|
---|
| 3014 |
|
---|
| 3015 | #define QSH_FREE_ALL(list)
|
---|
| 3016 | #define QSH_GET_SIZE(list, a) 0
|
---|
| 3017 | #define QSH_WRITE(a, b) 0
|
---|
| 3018 | #define QSH_PARSE(a, b, c, d) 0
|
---|
| 3019 | #define QSHPK_WRITE(a, b) 0
|
---|
| 3020 | #define QSH_SERREQ(a, b) 0
|
---|
| 3021 | #define QSH_VALIDATE_REQUEST(a, b)
|
---|
| 3022 |
|
---|
| 3023 | #endif /* HAVE_QSH */
|
---|
| 3024 |
|
---|
| 3025 |
|
---|
| 3026 | /** Finds an extension in the provided list. */
|
---|
| 3027 | TLSX* TLSX_Find(TLSX* list, TLSX_Type type)
|
---|
| 3028 | {
|
---|
| 3029 | TLSX* extension = list;
|
---|
| 3030 |
|
---|
| 3031 | while (extension && extension->type != type)
|
---|
| 3032 | extension = extension->next;
|
---|
| 3033 |
|
---|
| 3034 | return extension;
|
---|
| 3035 | }
|
---|
| 3036 |
|
---|
| 3037 | /** Releases all extensions in the provided list. */
|
---|
| 3038 | void TLSX_FreeAll(TLSX* list)
|
---|
| 3039 | {
|
---|
| 3040 | TLSX* extension;
|
---|
| 3041 |
|
---|
| 3042 | while ((extension = list)) {
|
---|
| 3043 | list = extension->next;
|
---|
| 3044 |
|
---|
| 3045 | switch (extension->type) {
|
---|
| 3046 |
|
---|
| 3047 | case SERVER_NAME_INDICATION:
|
---|
| 3048 | SNI_FREE_ALL((SNI*)extension->data);
|
---|
| 3049 | break;
|
---|
| 3050 |
|
---|
| 3051 | case MAX_FRAGMENT_LENGTH:
|
---|
| 3052 | MFL_FREE_ALL(extension->data);
|
---|
| 3053 | break;
|
---|
| 3054 |
|
---|
| 3055 | case TRUNCATED_HMAC:
|
---|
| 3056 | /* Nothing to do. */
|
---|
| 3057 | break;
|
---|
| 3058 |
|
---|
| 3059 | case ELLIPTIC_CURVES:
|
---|
| 3060 | EC_FREE_ALL(extension->data);
|
---|
| 3061 | break;
|
---|
| 3062 |
|
---|
| 3063 | case SECURE_RENEGOTIATION:
|
---|
| 3064 | SCR_FREE_ALL(extension->data);
|
---|
| 3065 | break;
|
---|
| 3066 |
|
---|
| 3067 | case SESSION_TICKET:
|
---|
| 3068 | /* Nothing to do. */
|
---|
| 3069 | break;
|
---|
| 3070 |
|
---|
| 3071 | case WOLFSSL_QSH:
|
---|
| 3072 | QSH_FREE_ALL(extension->data);
|
---|
| 3073 | break;
|
---|
| 3074 |
|
---|
| 3075 | case WOLFSSL_ALPN:
|
---|
| 3076 | ALPN_FREE_ALL((ALPN*)extension->data);
|
---|
| 3077 | break;
|
---|
| 3078 | }
|
---|
| 3079 |
|
---|
| 3080 | XFREE(extension, 0, DYNAMIC_TYPE_TLSX);
|
---|
| 3081 | }
|
---|
| 3082 | }
|
---|
| 3083 |
|
---|
| 3084 | /** Checks if the tls extensions are supported based on the protocol version. */
|
---|
| 3085 | int TLSX_SupportExtensions(WOLFSSL* ssl) {
|
---|
| 3086 | return ssl && (IsTLS(ssl) || ssl->version.major == DTLS_MAJOR);
|
---|
| 3087 | }
|
---|
| 3088 |
|
---|
| 3089 | /** Tells the buffered size of the extensions in a list. */
|
---|
| 3090 | static word16 TLSX_GetSize(TLSX* list, byte* semaphore, byte isRequest)
|
---|
| 3091 | {
|
---|
| 3092 | TLSX* extension;
|
---|
| 3093 | word16 length = 0;
|
---|
| 3094 |
|
---|
| 3095 | while ((extension = list)) {
|
---|
| 3096 | list = extension->next;
|
---|
| 3097 |
|
---|
| 3098 | /* only extensions marked as response are sent back to the client. */
|
---|
| 3099 | if (!isRequest && !extension->resp)
|
---|
| 3100 | continue; /* skip! */
|
---|
| 3101 |
|
---|
| 3102 | /* ssl level extensions are expected to override ctx level ones. */
|
---|
| 3103 | if (!IS_OFF(semaphore, TLSX_ToSemaphore(extension->type)))
|
---|
| 3104 | continue; /* skip! */
|
---|
| 3105 |
|
---|
| 3106 | /* extension type + extension data length. */
|
---|
| 3107 | length += HELLO_EXT_TYPE_SZ + OPAQUE16_LEN;
|
---|
| 3108 |
|
---|
| 3109 |
|
---|
| 3110 | switch (extension->type) {
|
---|
| 3111 |
|
---|
| 3112 | case SERVER_NAME_INDICATION:
|
---|
| 3113 | /* SNI only sends the name on the request. */
|
---|
| 3114 | if (isRequest)
|
---|
| 3115 | length += SNI_GET_SIZE(extension->data);
|
---|
| 3116 | break;
|
---|
| 3117 |
|
---|
| 3118 | case MAX_FRAGMENT_LENGTH:
|
---|
| 3119 | length += MFL_GET_SIZE(extension->data);
|
---|
| 3120 | break;
|
---|
| 3121 |
|
---|
| 3122 | case TRUNCATED_HMAC:
|
---|
| 3123 | /* always empty. */
|
---|
| 3124 | break;
|
---|
| 3125 |
|
---|
| 3126 | case ELLIPTIC_CURVES:
|
---|
| 3127 | length += EC_GET_SIZE(extension->data);
|
---|
| 3128 | break;
|
---|
| 3129 |
|
---|
| 3130 | case SECURE_RENEGOTIATION:
|
---|
| 3131 | length += SCR_GET_SIZE(extension->data, isRequest);
|
---|
| 3132 | break;
|
---|
| 3133 |
|
---|
| 3134 | case SESSION_TICKET:
|
---|
| 3135 | length += STK_GET_SIZE(extension->data, isRequest);
|
---|
| 3136 | break;
|
---|
| 3137 |
|
---|
| 3138 | case WOLFSSL_QSH:
|
---|
| 3139 | length += QSH_GET_SIZE(extension->data, isRequest);
|
---|
| 3140 | break;
|
---|
| 3141 |
|
---|
| 3142 | case WOLFSSL_ALPN:
|
---|
| 3143 | length += ALPN_GET_SIZE(extension->data);
|
---|
| 3144 | break;
|
---|
| 3145 |
|
---|
| 3146 | }
|
---|
| 3147 |
|
---|
| 3148 | /* marks the extension as processed so ctx level */
|
---|
| 3149 | /* extensions don't overlap with ssl level ones. */
|
---|
| 3150 | TURN_ON(semaphore, TLSX_ToSemaphore(extension->type));
|
---|
| 3151 | }
|
---|
| 3152 |
|
---|
| 3153 | return length;
|
---|
| 3154 | }
|
---|
| 3155 |
|
---|
| 3156 | /** Writes the extensions of a list in a buffer. */
|
---|
| 3157 | static word16 TLSX_Write(TLSX* list, byte* output, byte* semaphore,
|
---|
| 3158 | byte isRequest)
|
---|
| 3159 | {
|
---|
| 3160 | TLSX* extension;
|
---|
| 3161 | word16 offset = 0;
|
---|
| 3162 | word16 length_offset = 0;
|
---|
| 3163 |
|
---|
| 3164 | while ((extension = list)) {
|
---|
| 3165 | list = extension->next;
|
---|
| 3166 |
|
---|
| 3167 | /* only extensions marked as response are written in a response. */
|
---|
| 3168 | if (!isRequest && !extension->resp)
|
---|
| 3169 | continue; /* skip! */
|
---|
| 3170 |
|
---|
| 3171 | /* ssl level extensions are expected to override ctx level ones. */
|
---|
| 3172 | if (!IS_OFF(semaphore, TLSX_ToSemaphore(extension->type)))
|
---|
| 3173 | continue; /* skip! */
|
---|
| 3174 |
|
---|
| 3175 | /* writes extension type. */
|
---|
| 3176 | c16toa(extension->type, output + offset);
|
---|
| 3177 | offset += HELLO_EXT_TYPE_SZ + OPAQUE16_LEN;
|
---|
| 3178 | length_offset = offset;
|
---|
| 3179 |
|
---|
| 3180 | /* extension data should be written internally. */
|
---|
| 3181 | switch (extension->type) {
|
---|
| 3182 | case SERVER_NAME_INDICATION:
|
---|
| 3183 | if (isRequest)
|
---|
| 3184 | offset += SNI_WRITE(extension->data, output + offset);
|
---|
| 3185 | break;
|
---|
| 3186 |
|
---|
| 3187 | case MAX_FRAGMENT_LENGTH:
|
---|
| 3188 | offset += MFL_WRITE(extension->data, output + offset);
|
---|
| 3189 | break;
|
---|
| 3190 |
|
---|
| 3191 | case TRUNCATED_HMAC:
|
---|
| 3192 | /* always empty. */
|
---|
| 3193 | break;
|
---|
| 3194 |
|
---|
| 3195 | case ELLIPTIC_CURVES:
|
---|
| 3196 | offset += EC_WRITE(extension->data, output + offset);
|
---|
| 3197 | break;
|
---|
| 3198 |
|
---|
| 3199 | case SECURE_RENEGOTIATION:
|
---|
| 3200 | offset += SCR_WRITE(extension->data, output + offset,
|
---|
| 3201 | isRequest);
|
---|
| 3202 | break;
|
---|
| 3203 |
|
---|
| 3204 | case SESSION_TICKET:
|
---|
| 3205 | offset += STK_WRITE(extension->data, output + offset,
|
---|
| 3206 | isRequest);
|
---|
| 3207 | break;
|
---|
| 3208 |
|
---|
| 3209 | case WOLFSSL_QSH:
|
---|
| 3210 | if (isRequest) {
|
---|
| 3211 | offset += QSH_WRITE(extension->data, output + offset);
|
---|
| 3212 | }
|
---|
| 3213 | offset += QSHPK_WRITE(extension->data, output + offset);
|
---|
| 3214 | offset += QSH_SERREQ(output + offset, isRequest);
|
---|
| 3215 | break;
|
---|
| 3216 |
|
---|
| 3217 | case WOLFSSL_ALPN:
|
---|
| 3218 | offset += ALPN_WRITE(extension->data, output + offset);
|
---|
| 3219 | break;
|
---|
| 3220 | }
|
---|
| 3221 |
|
---|
| 3222 | /* writes extension data length. */
|
---|
| 3223 | c16toa(offset - length_offset, output + length_offset - OPAQUE16_LEN);
|
---|
| 3224 |
|
---|
| 3225 | /* marks the extension as processed so ctx level */
|
---|
| 3226 | /* extensions don't overlap with ssl level ones. */
|
---|
| 3227 | TURN_ON(semaphore, TLSX_ToSemaphore(extension->type));
|
---|
| 3228 | }
|
---|
| 3229 |
|
---|
| 3230 | return offset;
|
---|
| 3231 | }
|
---|
| 3232 |
|
---|
| 3233 |
|
---|
| 3234 | #ifdef HAVE_NTRU
|
---|
| 3235 |
|
---|
| 3236 | static word32 GetEntropy(unsigned char* out, word32 num_bytes)
|
---|
| 3237 | {
|
---|
| 3238 | int ret = 0;
|
---|
| 3239 |
|
---|
| 3240 | if (rng == NULL) {
|
---|
| 3241 | if ((rng = XMALLOC(sizeof(WC_RNG), 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 3242 | return DRBG_OUT_OF_MEMORY;
|
---|
| 3243 | wc_InitRng(rng);
|
---|
| 3244 | }
|
---|
| 3245 |
|
---|
| 3246 | if (rngMutex == NULL) {
|
---|
| 3247 | if ((rngMutex = XMALLOC(sizeof(wolfSSL_Mutex), 0,
|
---|
| 3248 | DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 3249 | return DRBG_OUT_OF_MEMORY;
|
---|
| 3250 | InitMutex(rngMutex);
|
---|
| 3251 | }
|
---|
| 3252 |
|
---|
| 3253 | ret |= LockMutex(rngMutex);
|
---|
| 3254 | ret |= wc_RNG_GenerateBlock(rng, out, num_bytes);
|
---|
| 3255 | ret |= UnLockMutex(rngMutex);
|
---|
| 3256 |
|
---|
| 3257 | if (ret != 0)
|
---|
| 3258 | return DRBG_ENTROPY_FAIL;
|
---|
| 3259 |
|
---|
| 3260 | return DRBG_OK;
|
---|
| 3261 | }
|
---|
| 3262 | #endif
|
---|
| 3263 |
|
---|
| 3264 |
|
---|
| 3265 | #ifdef HAVE_QSH
|
---|
| 3266 | static int TLSX_CreateQSHKey(WOLFSSL* ssl, int type)
|
---|
| 3267 | {
|
---|
| 3268 | int ret;
|
---|
| 3269 |
|
---|
| 3270 | switch (type) {
|
---|
| 3271 | #ifdef HAVE_NTRU
|
---|
| 3272 | case WOLFSSL_NTRU_EESS439:
|
---|
| 3273 | case WOLFSSL_NTRU_EESS593:
|
---|
| 3274 | case WOLFSSL_NTRU_EESS743:
|
---|
| 3275 | ret = TLSX_CreateNtruKey(ssl, type);
|
---|
| 3276 | break;
|
---|
| 3277 | #endif
|
---|
| 3278 | default:
|
---|
| 3279 | WOLFSSL_MSG("Unknown type for creating NTRU key");
|
---|
| 3280 | return -1;
|
---|
| 3281 | }
|
---|
| 3282 |
|
---|
| 3283 | return ret;
|
---|
| 3284 | }
|
---|
| 3285 |
|
---|
| 3286 |
|
---|
| 3287 | static int TLSX_AddQSHKey(QSHKey** list, QSHKey* key)
|
---|
| 3288 | {
|
---|
| 3289 | if (key == NULL)
|
---|
| 3290 | return BAD_FUNC_ARG;
|
---|
| 3291 |
|
---|
| 3292 | /* if no public key stored in key then do not add */
|
---|
| 3293 | if (key->pub.length == 0 || key->pub.buffer == NULL)
|
---|
| 3294 | return 0;
|
---|
| 3295 |
|
---|
| 3296 | /* first element to be added to the list */
|
---|
| 3297 | QSHKey* current = *list;
|
---|
| 3298 | if (current == NULL) {
|
---|
| 3299 | *list = key;
|
---|
| 3300 | return 0;
|
---|
| 3301 | }
|
---|
| 3302 |
|
---|
| 3303 | while (current->next) {
|
---|
| 3304 | /* can only have one of the key in the list */
|
---|
| 3305 | if (current->name == key->name)
|
---|
| 3306 | return -1;
|
---|
| 3307 | current = (QSHKey*)current->next;
|
---|
| 3308 | }
|
---|
| 3309 |
|
---|
| 3310 | current->next = (struct QSHKey*)key;
|
---|
| 3311 |
|
---|
| 3312 | return 0;
|
---|
| 3313 | }
|
---|
| 3314 |
|
---|
| 3315 |
|
---|
| 3316 | #ifdef HAVE_NTRU
|
---|
| 3317 | int TLSX_CreateNtruKey(WOLFSSL* ssl, int type)
|
---|
| 3318 | {
|
---|
| 3319 | int ret;
|
---|
| 3320 | int ntruType;
|
---|
| 3321 |
|
---|
| 3322 | /* variable declarations for NTRU*/
|
---|
| 3323 | QSHKey* temp = NULL;
|
---|
| 3324 | byte public_key[1027];
|
---|
| 3325 | word16 public_key_len = sizeof(public_key);
|
---|
| 3326 | byte private_key[1120];
|
---|
| 3327 | word16 private_key_len = sizeof(private_key);
|
---|
| 3328 | DRBG_HANDLE drbg;
|
---|
| 3329 |
|
---|
| 3330 | if (ssl == NULL)
|
---|
| 3331 | return BAD_FUNC_ARG;
|
---|
| 3332 |
|
---|
| 3333 | switch (type) {
|
---|
| 3334 | case WOLFSSL_NTRU_EESS439:
|
---|
| 3335 | ntruType = NTRU_EES439EP1;
|
---|
| 3336 | break;
|
---|
| 3337 | case WOLFSSL_NTRU_EESS593:
|
---|
| 3338 | ntruType = NTRU_EES593EP1;
|
---|
| 3339 | break;
|
---|
| 3340 | case WOLFSSL_NTRU_EESS743:
|
---|
| 3341 | ntruType = NTRU_EES743EP1;
|
---|
| 3342 | break;
|
---|
| 3343 | default:
|
---|
| 3344 | WOLFSSL_MSG("Unknown type for creating NTRU key");
|
---|
| 3345 | return -1;
|
---|
| 3346 | }
|
---|
| 3347 | ret = ntru_crypto_drbg_external_instantiate(GetEntropy, &drbg);
|
---|
| 3348 | if (ret != DRBG_OK) {
|
---|
| 3349 | WOLFSSL_MSG("NTRU drbg instantiate failed\n");
|
---|
| 3350 | return ret;
|
---|
| 3351 | }
|
---|
| 3352 |
|
---|
| 3353 | if ((ret = ntru_crypto_ntru_encrypt_keygen(drbg, ntruType,
|
---|
| 3354 | &public_key_len, NULL, &private_key_len, NULL)) != NTRU_OK)
|
---|
| 3355 | return ret;
|
---|
| 3356 |
|
---|
| 3357 | if ((ret = ntru_crypto_ntru_encrypt_keygen(drbg, ntruType,
|
---|
| 3358 | &public_key_len, public_key, &private_key_len, private_key)) != NTRU_OK)
|
---|
| 3359 | return ret;
|
---|
| 3360 |
|
---|
| 3361 | ret = ntru_crypto_drbg_uninstantiate(drbg);
|
---|
| 3362 | if (ret != NTRU_OK) {
|
---|
| 3363 | WOLFSSL_MSG("NTRU drbg uninstantiate failed\n");
|
---|
| 3364 | return ret;
|
---|
| 3365 | }
|
---|
| 3366 |
|
---|
| 3367 | if ((temp = XMALLOC(sizeof(QSHKey), 0, DYNAMIC_TYPE_TLSX)) == NULL)
|
---|
| 3368 | return MEMORY_E;
|
---|
| 3369 | temp->name = type;
|
---|
| 3370 | temp->pub.length = public_key_len;
|
---|
| 3371 | temp->pub.buffer = XMALLOC(public_key_len, public_key,
|
---|
| 3372 | DYNAMIC_TYPE_PUBLIC_KEY);
|
---|
| 3373 | XMEMCPY(temp->pub.buffer, public_key, public_key_len);
|
---|
| 3374 | temp->pri.length = private_key_len;
|
---|
| 3375 | temp->pri.buffer = XMALLOC(private_key_len, private_key,
|
---|
| 3376 | DYNAMIC_TYPE_ARRAYS);
|
---|
| 3377 | XMEMCPY(temp->pri.buffer, private_key, private_key_len);
|
---|
| 3378 | temp->next = NULL;
|
---|
| 3379 |
|
---|
| 3380 | TLSX_AddQSHKey(&ssl->QSH_Key, temp);
|
---|
| 3381 |
|
---|
| 3382 | return ret;
|
---|
| 3383 | }
|
---|
| 3384 | #endif
|
---|
| 3385 |
|
---|
| 3386 |
|
---|
| 3387 | /*
|
---|
| 3388 | Used to find a public key from the list of keys
|
---|
| 3389 | pubLen length of array
|
---|
| 3390 | name input the name of the scheme looking for ie WOLFSSL_NTRU_ESSXXX
|
---|
| 3391 |
|
---|
| 3392 | returns a pointer to public key byte* or NULL if not found
|
---|
| 3393 | */
|
---|
| 3394 | static byte* TLSX_QSHKeyFind_Pub(QSHKey* qsh, word16* pubLen, word16 name)
|
---|
| 3395 | {
|
---|
| 3396 | QSHKey* current = qsh;
|
---|
| 3397 |
|
---|
| 3398 | if (qsh == NULL || pubLen == NULL)
|
---|
| 3399 | return NULL;
|
---|
| 3400 |
|
---|
| 3401 | *pubLen = 0;
|
---|
| 3402 |
|
---|
| 3403 | while(current) {
|
---|
| 3404 | if (current->name == name) {
|
---|
| 3405 | *pubLen = current->pub.length;
|
---|
| 3406 | return current->pub.buffer;
|
---|
| 3407 | }
|
---|
| 3408 | current = (QSHKey*)current->next;
|
---|
| 3409 | }
|
---|
| 3410 |
|
---|
| 3411 | return NULL;
|
---|
| 3412 | }
|
---|
| 3413 | #endif /* HAVE_QSH */
|
---|
| 3414 |
|
---|
| 3415 |
|
---|
| 3416 | int TLSX_PopulateExtensions(WOLFSSL* ssl, byte isServer)
|
---|
| 3417 | {
|
---|
| 3418 | byte* public_key = NULL;
|
---|
| 3419 | word16 public_key_len = 0;
|
---|
| 3420 | #ifdef HAVE_QSH
|
---|
| 3421 | TLSX* extension;
|
---|
| 3422 | QSHScheme* qsh;
|
---|
| 3423 | QSHScheme* next;
|
---|
| 3424 | #endif
|
---|
| 3425 | int ret = 0;
|
---|
| 3426 |
|
---|
| 3427 | #ifdef HAVE_QSH
|
---|
| 3428 | /* add supported QSHSchemes */
|
---|
| 3429 | WOLFSSL_MSG("Adding supported QSH Schemes");
|
---|
| 3430 |
|
---|
| 3431 | /* server will add extension depending on whats parsed from client */
|
---|
| 3432 | if (!isServer) {
|
---|
| 3433 |
|
---|
| 3434 | /* test if user has set a specific scheme already */
|
---|
| 3435 | if (!ssl->user_set_QSHSchemes) {
|
---|
| 3436 | if (ssl->sendQSHKeys && ssl->QSH_Key == NULL) {
|
---|
| 3437 | if ((ret = TLSX_CreateQSHKey(ssl, WOLFSSL_NTRU_EESS743)) != 0) {
|
---|
| 3438 | WOLFSSL_MSG("Error creating ntru keys");
|
---|
| 3439 | return ret;
|
---|
| 3440 | }
|
---|
| 3441 | if ((ret = TLSX_CreateQSHKey(ssl, WOLFSSL_NTRU_EESS593)) != 0) {
|
---|
| 3442 | WOLFSSL_MSG("Error creating ntru keys");
|
---|
| 3443 | return ret;
|
---|
| 3444 | }
|
---|
| 3445 | if ((ret = TLSX_CreateQSHKey(ssl, WOLFSSL_NTRU_EESS439)) != 0) {
|
---|
| 3446 | WOLFSSL_MSG("Error creating ntru keys");
|
---|
| 3447 | return ret;
|
---|
| 3448 | }
|
---|
| 3449 |
|
---|
| 3450 | /* add NTRU 256 */
|
---|
| 3451 | public_key = TLSX_QSHKeyFind_Pub(ssl->QSH_Key,
|
---|
| 3452 | &public_key_len, WOLFSSL_NTRU_EESS743);
|
---|
| 3453 | }
|
---|
| 3454 | if (TLSX_UseQSHScheme(&ssl->extensions, WOLFSSL_NTRU_EESS743,
|
---|
| 3455 | public_key, public_key_len) != SSL_SUCCESS)
|
---|
| 3456 | ret = -1;
|
---|
| 3457 |
|
---|
| 3458 | /* add NTRU 196 */
|
---|
| 3459 | if (ssl->sendQSHKeys) {
|
---|
| 3460 | public_key = TLSX_QSHKeyFind_Pub(ssl->QSH_Key,
|
---|
| 3461 | &public_key_len, WOLFSSL_NTRU_EESS593);
|
---|
| 3462 | }
|
---|
| 3463 | if (TLSX_UseQSHScheme(&ssl->extensions, WOLFSSL_NTRU_EESS593,
|
---|
| 3464 | public_key, public_key_len) != SSL_SUCCESS)
|
---|
| 3465 | ret = -1;
|
---|
| 3466 |
|
---|
| 3467 | /* add NTRU 128 */
|
---|
| 3468 | if (ssl->sendQSHKeys) {
|
---|
| 3469 | public_key = TLSX_QSHKeyFind_Pub(ssl->QSH_Key,
|
---|
| 3470 | &public_key_len, WOLFSSL_NTRU_EESS439);
|
---|
| 3471 | }
|
---|
| 3472 | if (TLSX_UseQSHScheme(&ssl->extensions, WOLFSSL_NTRU_EESS439,
|
---|
| 3473 | public_key, public_key_len) != SSL_SUCCESS)
|
---|
| 3474 | ret = -1;
|
---|
| 3475 | }
|
---|
| 3476 | else if (ssl->sendQSHKeys && ssl->QSH_Key == NULL) {
|
---|
| 3477 | /* for each scheme make a client key */
|
---|
| 3478 | extension = TLSX_Find(ssl->extensions, WOLFSSL_QSH);
|
---|
| 3479 | if (extension) {
|
---|
| 3480 | qsh = (QSHScheme*)extension->data;
|
---|
| 3481 |
|
---|
| 3482 | while (qsh) {
|
---|
| 3483 | if ((ret = TLSX_CreateQSHKey(ssl, qsh->name)) != 0)
|
---|
| 3484 | return ret;
|
---|
| 3485 |
|
---|
| 3486 | /* get next now because qsh could be freed */
|
---|
| 3487 | next = qsh->next;
|
---|
| 3488 |
|
---|
| 3489 | /* find the public key created and add to extension*/
|
---|
| 3490 | public_key = TLSX_QSHKeyFind_Pub(ssl->QSH_Key,
|
---|
| 3491 | &public_key_len, qsh->name);
|
---|
| 3492 | if (TLSX_UseQSHScheme(&ssl->extensions, qsh->name,
|
---|
| 3493 | public_key, public_key_len) != SSL_SUCCESS)
|
---|
| 3494 | ret = -1;
|
---|
| 3495 | qsh = next;
|
---|
| 3496 | }
|
---|
| 3497 | }
|
---|
| 3498 | }
|
---|
| 3499 | } /* is not server */
|
---|
| 3500 | #endif
|
---|
| 3501 |
|
---|
| 3502 | (void)isServer;
|
---|
| 3503 | (void)public_key;
|
---|
| 3504 | (void)public_key_len;
|
---|
| 3505 | (void)ssl;
|
---|
| 3506 |
|
---|
| 3507 | return ret;
|
---|
| 3508 | }
|
---|
| 3509 |
|
---|
| 3510 |
|
---|
| 3511 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 3512 |
|
---|
| 3513 | /** Tells the buffered size of extensions to be sent into the client hello. */
|
---|
| 3514 | word16 TLSX_GetRequestSize(WOLFSSL* ssl)
|
---|
| 3515 | {
|
---|
| 3516 | word16 length = 0;
|
---|
| 3517 |
|
---|
| 3518 | if (TLSX_SupportExtensions(ssl)) {
|
---|
| 3519 | byte semaphore[SEMAPHORE_SIZE] = {0};
|
---|
| 3520 |
|
---|
| 3521 | EC_VALIDATE_REQUEST(ssl, semaphore);
|
---|
| 3522 | QSH_VALIDATE_REQUEST(ssl, semaphore);
|
---|
| 3523 | STK_VALIDATE_REQUEST(ssl);
|
---|
| 3524 |
|
---|
| 3525 | if (ssl->extensions)
|
---|
| 3526 | length += TLSX_GetSize(ssl->extensions, semaphore, 1);
|
---|
| 3527 |
|
---|
| 3528 | if (ssl->ctx && ssl->ctx->extensions)
|
---|
| 3529 | length += TLSX_GetSize(ssl->ctx->extensions, semaphore, 1);
|
---|
| 3530 |
|
---|
| 3531 | if (IsAtLeastTLSv1_2(ssl) && ssl->suites->hashSigAlgoSz)
|
---|
| 3532 | length += ssl->suites->hashSigAlgoSz + HELLO_EXT_LEN;
|
---|
| 3533 | }
|
---|
| 3534 |
|
---|
| 3535 | if (length)
|
---|
| 3536 | length += OPAQUE16_LEN; /* for total length storage. */
|
---|
| 3537 |
|
---|
| 3538 | return length;
|
---|
| 3539 | }
|
---|
| 3540 |
|
---|
| 3541 | /** Writes the extensions to be sent into the client hello. */
|
---|
| 3542 | word16 TLSX_WriteRequest(WOLFSSL* ssl, byte* output)
|
---|
| 3543 | {
|
---|
| 3544 | word16 offset = 0;
|
---|
| 3545 |
|
---|
| 3546 | if (TLSX_SupportExtensions(ssl) && output) {
|
---|
| 3547 | byte semaphore[SEMAPHORE_SIZE] = {0};
|
---|
| 3548 |
|
---|
| 3549 | offset += OPAQUE16_LEN; /* extensions length */
|
---|
| 3550 |
|
---|
| 3551 | EC_VALIDATE_REQUEST(ssl, semaphore);
|
---|
| 3552 | STK_VALIDATE_REQUEST(ssl);
|
---|
| 3553 | QSH_VALIDATE_REQUEST(ssl, semaphore);
|
---|
| 3554 |
|
---|
| 3555 | if (ssl->extensions)
|
---|
| 3556 | offset += TLSX_Write(ssl->extensions, output + offset,
|
---|
| 3557 | semaphore, 1);
|
---|
| 3558 |
|
---|
| 3559 | if (ssl->ctx && ssl->ctx->extensions)
|
---|
| 3560 | offset += TLSX_Write(ssl->ctx->extensions, output + offset,
|
---|
| 3561 | semaphore, 1);
|
---|
| 3562 |
|
---|
| 3563 | if (IsAtLeastTLSv1_2(ssl) && ssl->suites->hashSigAlgoSz)
|
---|
| 3564 | {
|
---|
| 3565 | int i;
|
---|
| 3566 | /* extension type */
|
---|
| 3567 | c16toa(HELLO_EXT_SIG_ALGO, output + offset);
|
---|
| 3568 | offset += HELLO_EXT_TYPE_SZ;
|
---|
| 3569 |
|
---|
| 3570 | /* extension data length */
|
---|
| 3571 | c16toa(OPAQUE16_LEN + ssl->suites->hashSigAlgoSz, output + offset);
|
---|
| 3572 | offset += OPAQUE16_LEN;
|
---|
| 3573 |
|
---|
| 3574 | /* sig algos length */
|
---|
| 3575 | c16toa(ssl->suites->hashSigAlgoSz, output + offset);
|
---|
| 3576 | offset += OPAQUE16_LEN;
|
---|
| 3577 |
|
---|
| 3578 | /* sig algos */
|
---|
| 3579 | for (i = 0; i < ssl->suites->hashSigAlgoSz; i++, offset++)
|
---|
| 3580 | output[offset] = ssl->suites->hashSigAlgo[i];
|
---|
| 3581 | }
|
---|
| 3582 |
|
---|
| 3583 | if (offset > OPAQUE16_LEN)
|
---|
| 3584 | c16toa(offset - OPAQUE16_LEN, output); /* extensions length */
|
---|
| 3585 | }
|
---|
| 3586 |
|
---|
| 3587 | return offset;
|
---|
| 3588 | }
|
---|
| 3589 |
|
---|
| 3590 | #endif /* NO_WOLFSSL_CLIENT */
|
---|
| 3591 |
|
---|
| 3592 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 3593 |
|
---|
| 3594 | /** Tells the buffered size of extensions to be sent into the server hello. */
|
---|
| 3595 | word16 TLSX_GetResponseSize(WOLFSSL* ssl)
|
---|
| 3596 | {
|
---|
| 3597 | word16 length = 0;
|
---|
| 3598 | byte semaphore[SEMAPHORE_SIZE] = {0};
|
---|
| 3599 |
|
---|
| 3600 | #ifdef HAVE_QSH
|
---|
| 3601 | /* change response if not using TLS_QSH */
|
---|
| 3602 | if (!ssl->options.haveQSH) {
|
---|
| 3603 | TLSX* ext = TLSX_Find(ssl->extensions, WOLFSSL_QSH);
|
---|
| 3604 | if (ext)
|
---|
| 3605 | ext->resp = 0;
|
---|
| 3606 | }
|
---|
| 3607 | #endif
|
---|
| 3608 |
|
---|
| 3609 | if (TLSX_SupportExtensions(ssl))
|
---|
| 3610 | length += TLSX_GetSize(ssl->extensions, semaphore, 0);
|
---|
| 3611 |
|
---|
| 3612 | /* All the response data is set at the ssl object only, so no ctx here. */
|
---|
| 3613 |
|
---|
| 3614 | if (length)
|
---|
| 3615 | length += OPAQUE16_LEN; /* for total length storage */
|
---|
| 3616 |
|
---|
| 3617 | return length;
|
---|
| 3618 | }
|
---|
| 3619 |
|
---|
| 3620 | /** Writes the server hello extensions into a buffer. */
|
---|
| 3621 | word16 TLSX_WriteResponse(WOLFSSL *ssl, byte* output)
|
---|
| 3622 | {
|
---|
| 3623 | word16 offset = 0;
|
---|
| 3624 |
|
---|
| 3625 | if (TLSX_SupportExtensions(ssl) && output) {
|
---|
| 3626 | byte semaphore[SEMAPHORE_SIZE] = {0};
|
---|
| 3627 |
|
---|
| 3628 | offset += OPAQUE16_LEN; /* extensions length */
|
---|
| 3629 |
|
---|
| 3630 | offset += TLSX_Write(ssl->extensions, output + offset, semaphore, 0);
|
---|
| 3631 |
|
---|
| 3632 | if (offset > OPAQUE16_LEN)
|
---|
| 3633 | c16toa(offset - OPAQUE16_LEN, output); /* extensions length */
|
---|
| 3634 | }
|
---|
| 3635 |
|
---|
| 3636 | return offset;
|
---|
| 3637 | }
|
---|
| 3638 |
|
---|
| 3639 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 3640 |
|
---|
| 3641 | /** Parses a buffer of TLS extensions. */
|
---|
| 3642 | int TLSX_Parse(WOLFSSL* ssl, byte* input, word16 length, byte isRequest,
|
---|
| 3643 | Suites *suites)
|
---|
| 3644 | {
|
---|
| 3645 | int ret = 0;
|
---|
| 3646 | word16 offset = 0;
|
---|
| 3647 |
|
---|
| 3648 | if (!ssl || !input || (isRequest && !suites))
|
---|
| 3649 | return BAD_FUNC_ARG;
|
---|
| 3650 |
|
---|
| 3651 | while (ret == 0 && offset < length) {
|
---|
| 3652 | word16 type;
|
---|
| 3653 | word16 size;
|
---|
| 3654 |
|
---|
| 3655 | if (length - offset < HELLO_EXT_TYPE_SZ + OPAQUE16_LEN)
|
---|
| 3656 | return BUFFER_ERROR;
|
---|
| 3657 |
|
---|
| 3658 | ato16(input + offset, &type);
|
---|
| 3659 | offset += HELLO_EXT_TYPE_SZ;
|
---|
| 3660 |
|
---|
| 3661 | ato16(input + offset, &size);
|
---|
| 3662 | offset += OPAQUE16_LEN;
|
---|
| 3663 |
|
---|
| 3664 | if (offset + size > length)
|
---|
| 3665 | return BUFFER_ERROR;
|
---|
| 3666 |
|
---|
| 3667 | switch (type) {
|
---|
| 3668 | case SERVER_NAME_INDICATION:
|
---|
| 3669 | WOLFSSL_MSG("SNI extension received");
|
---|
| 3670 |
|
---|
| 3671 | ret = SNI_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3672 | break;
|
---|
| 3673 |
|
---|
| 3674 | case MAX_FRAGMENT_LENGTH:
|
---|
| 3675 | WOLFSSL_MSG("Max Fragment Length extension received");
|
---|
| 3676 |
|
---|
| 3677 | ret = MFL_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3678 | break;
|
---|
| 3679 |
|
---|
| 3680 | case TRUNCATED_HMAC:
|
---|
| 3681 | WOLFSSL_MSG("Truncated HMAC extension received");
|
---|
| 3682 |
|
---|
| 3683 | ret = THM_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3684 | break;
|
---|
| 3685 |
|
---|
| 3686 | case ELLIPTIC_CURVES:
|
---|
| 3687 | WOLFSSL_MSG("Elliptic Curves extension received");
|
---|
| 3688 |
|
---|
| 3689 | ret = EC_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3690 | break;
|
---|
| 3691 |
|
---|
| 3692 | case SECURE_RENEGOTIATION:
|
---|
| 3693 | WOLFSSL_MSG("Secure Renegotiation extension received");
|
---|
| 3694 |
|
---|
| 3695 | ret = SCR_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3696 | break;
|
---|
| 3697 |
|
---|
| 3698 | case SESSION_TICKET:
|
---|
| 3699 | WOLFSSL_MSG("Session Ticket extension received");
|
---|
| 3700 |
|
---|
| 3701 | ret = STK_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3702 | break;
|
---|
| 3703 |
|
---|
| 3704 | case WOLFSSL_QSH:
|
---|
| 3705 | WOLFSSL_MSG("Quantum-Safe-Hybrid extension received");
|
---|
| 3706 |
|
---|
| 3707 | ret = QSH_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3708 | break;
|
---|
| 3709 |
|
---|
| 3710 | case WOLFSSL_ALPN:
|
---|
| 3711 | WOLFSSL_MSG("ALPN extension received");
|
---|
| 3712 |
|
---|
| 3713 | ret = ALPN_PARSE(ssl, input + offset, size, isRequest);
|
---|
| 3714 | break;
|
---|
| 3715 |
|
---|
| 3716 | case HELLO_EXT_SIG_ALGO:
|
---|
| 3717 | if (isRequest) {
|
---|
| 3718 | /* do not mess with offset inside the switch! */
|
---|
| 3719 | if (IsAtLeastTLSv1_2(ssl)) {
|
---|
| 3720 | ato16(input + offset, &suites->hashSigAlgoSz);
|
---|
| 3721 |
|
---|
| 3722 | if (suites->hashSigAlgoSz > size - OPAQUE16_LEN)
|
---|
| 3723 | return BUFFER_ERROR;
|
---|
| 3724 |
|
---|
| 3725 | XMEMCPY(suites->hashSigAlgo,
|
---|
| 3726 | input + offset + OPAQUE16_LEN,
|
---|
| 3727 | min(suites->hashSigAlgoSz,
|
---|
| 3728 | HELLO_EXT_SIGALGO_MAX));
|
---|
| 3729 | }
|
---|
| 3730 | } else {
|
---|
| 3731 | WOLFSSL_MSG("Servers MUST NOT send SIG ALGO extension.");
|
---|
| 3732 | }
|
---|
| 3733 |
|
---|
| 3734 | break;
|
---|
| 3735 | }
|
---|
| 3736 |
|
---|
| 3737 | /* offset should be updated here! */
|
---|
| 3738 | offset += size;
|
---|
| 3739 | }
|
---|
| 3740 |
|
---|
| 3741 | if (ret == 0)
|
---|
| 3742 | ret = SNI_VERIFY_PARSE(ssl, isRequest);
|
---|
| 3743 |
|
---|
| 3744 | return ret;
|
---|
| 3745 | }
|
---|
| 3746 |
|
---|
| 3747 | /* undefining semaphore macros */
|
---|
| 3748 | #undef IS_OFF
|
---|
| 3749 | #undef TURN_ON
|
---|
| 3750 | #undef SEMAPHORE_SIZE
|
---|
| 3751 |
|
---|
| 3752 | #endif /* HAVE_TLS_EXTENSIONS */
|
---|
| 3753 |
|
---|
| 3754 | #ifndef NO_WOLFSSL_CLIENT
|
---|
| 3755 |
|
---|
| 3756 | #ifndef NO_OLD_TLS
|
---|
| 3757 |
|
---|
| 3758 | WOLFSSL_METHOD* wolfTLSv1_client_method(void)
|
---|
| 3759 | {
|
---|
| 3760 | WOLFSSL_METHOD* method =
|
---|
| 3761 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3762 | DYNAMIC_TYPE_METHOD);
|
---|
| 3763 | if (method)
|
---|
| 3764 | InitSSL_Method(method, MakeTLSv1());
|
---|
| 3765 | return method;
|
---|
| 3766 | }
|
---|
| 3767 |
|
---|
| 3768 |
|
---|
| 3769 | WOLFSSL_METHOD* wolfTLSv1_1_client_method(void)
|
---|
| 3770 | {
|
---|
| 3771 | WOLFSSL_METHOD* method =
|
---|
| 3772 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3773 | DYNAMIC_TYPE_METHOD);
|
---|
| 3774 | if (method)
|
---|
| 3775 | InitSSL_Method(method, MakeTLSv1_1());
|
---|
| 3776 | return method;
|
---|
| 3777 | }
|
---|
| 3778 |
|
---|
| 3779 | #endif /* !NO_OLD_TLS */
|
---|
| 3780 |
|
---|
| 3781 | #ifndef NO_SHA256 /* can't use without SHA256 */
|
---|
| 3782 |
|
---|
| 3783 | WOLFSSL_METHOD* wolfTLSv1_2_client_method(void)
|
---|
| 3784 | {
|
---|
| 3785 | WOLFSSL_METHOD* method =
|
---|
| 3786 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3787 | DYNAMIC_TYPE_METHOD);
|
---|
| 3788 | if (method)
|
---|
| 3789 | InitSSL_Method(method, MakeTLSv1_2());
|
---|
| 3790 | return method;
|
---|
| 3791 | }
|
---|
| 3792 |
|
---|
| 3793 | #endif
|
---|
| 3794 |
|
---|
| 3795 |
|
---|
| 3796 | WOLFSSL_METHOD* wolfSSLv23_client_method(void)
|
---|
| 3797 | {
|
---|
| 3798 | WOLFSSL_METHOD* method =
|
---|
| 3799 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3800 | DYNAMIC_TYPE_METHOD);
|
---|
| 3801 | if (method) {
|
---|
| 3802 | #ifndef NO_SHA256 /* 1.2 requires SHA256 */
|
---|
| 3803 | InitSSL_Method(method, MakeTLSv1_2());
|
---|
| 3804 | #else
|
---|
| 3805 | InitSSL_Method(method, MakeTLSv1_1());
|
---|
| 3806 | #endif
|
---|
| 3807 | #ifndef NO_OLD_TLS
|
---|
| 3808 | method->downgrade = 1;
|
---|
| 3809 | #endif
|
---|
| 3810 | }
|
---|
| 3811 | return method;
|
---|
| 3812 | }
|
---|
| 3813 |
|
---|
| 3814 |
|
---|
| 3815 | #endif /* NO_WOLFSSL_CLIENT */
|
---|
| 3816 |
|
---|
| 3817 |
|
---|
| 3818 |
|
---|
| 3819 | #ifndef NO_WOLFSSL_SERVER
|
---|
| 3820 |
|
---|
| 3821 | #ifndef NO_OLD_TLS
|
---|
| 3822 |
|
---|
| 3823 | WOLFSSL_METHOD* wolfTLSv1_server_method(void)
|
---|
| 3824 | {
|
---|
| 3825 | WOLFSSL_METHOD* method =
|
---|
| 3826 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3827 | DYNAMIC_TYPE_METHOD);
|
---|
| 3828 | if (method) {
|
---|
| 3829 | InitSSL_Method(method, MakeTLSv1());
|
---|
| 3830 | method->side = WOLFSSL_SERVER_END;
|
---|
| 3831 | }
|
---|
| 3832 | return method;
|
---|
| 3833 | }
|
---|
| 3834 |
|
---|
| 3835 |
|
---|
| 3836 | WOLFSSL_METHOD* wolfTLSv1_1_server_method(void)
|
---|
| 3837 | {
|
---|
| 3838 | WOLFSSL_METHOD* method =
|
---|
| 3839 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3840 | DYNAMIC_TYPE_METHOD);
|
---|
| 3841 | if (method) {
|
---|
| 3842 | InitSSL_Method(method, MakeTLSv1_1());
|
---|
| 3843 | method->side = WOLFSSL_SERVER_END;
|
---|
| 3844 | }
|
---|
| 3845 | return method;
|
---|
| 3846 | }
|
---|
| 3847 |
|
---|
| 3848 | #endif /* !NO_OLD_TLS */
|
---|
| 3849 |
|
---|
| 3850 | #ifndef NO_SHA256 /* can't use without SHA256 */
|
---|
| 3851 |
|
---|
| 3852 | WOLFSSL_METHOD* wolfTLSv1_2_server_method(void)
|
---|
| 3853 | {
|
---|
| 3854 | WOLFSSL_METHOD* method =
|
---|
| 3855 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3856 | DYNAMIC_TYPE_METHOD);
|
---|
| 3857 | if (method) {
|
---|
| 3858 | InitSSL_Method(method, MakeTLSv1_2());
|
---|
| 3859 | method->side = WOLFSSL_SERVER_END;
|
---|
| 3860 | }
|
---|
| 3861 | return method;
|
---|
| 3862 | }
|
---|
| 3863 |
|
---|
| 3864 | #endif
|
---|
| 3865 |
|
---|
| 3866 |
|
---|
| 3867 | WOLFSSL_METHOD* wolfSSLv23_server_method(void)
|
---|
| 3868 | {
|
---|
| 3869 | WOLFSSL_METHOD* method =
|
---|
| 3870 | (WOLFSSL_METHOD*) XMALLOC(sizeof(WOLFSSL_METHOD), 0,
|
---|
| 3871 | DYNAMIC_TYPE_METHOD);
|
---|
| 3872 | if (method) {
|
---|
| 3873 | #ifndef NO_SHA256 /* 1.2 requires SHA256 */
|
---|
| 3874 | InitSSL_Method(method, MakeTLSv1_2());
|
---|
| 3875 | #else
|
---|
| 3876 | InitSSL_Method(method, MakeTLSv1_1());
|
---|
| 3877 | #endif
|
---|
| 3878 | method->side = WOLFSSL_SERVER_END;
|
---|
| 3879 | #ifndef NO_OLD_TLS
|
---|
| 3880 | method->downgrade = 1;
|
---|
| 3881 | #endif /* !NO_OLD_TLS */
|
---|
| 3882 | }
|
---|
| 3883 | return method;
|
---|
| 3884 | }
|
---|
| 3885 |
|
---|
| 3886 |
|
---|
| 3887 |
|
---|
| 3888 | #endif /* NO_WOLFSSL_SERVER */
|
---|
| 3889 | #endif /* NO_TLS */
|
---|
| 3890 | #endif /* WOLFCRYPT_ONLY */
|
---|