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;
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422 | }
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423 |
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424 |
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425 | static const byte master_label[MASTER_LABEL_SZ + 1] = "master secret";
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426 | static const byte key_label [KEY_LABEL_SZ + 1] = "key expansion";
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427 |
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428 |
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429 | /* External facing wrapper so user can call as well, 0 on success */
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430 | int wolfSSL_DeriveTlsKeys(byte* key_data, word32 keyLen,
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431 | const byte* ms, word32 msLen,
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432 | const byte* sr, const byte* cr,
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433 | int tls1_2, int hash_type)
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434 | {
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435 | byte seed[SEED_LEN];
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436 |
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437 | XMEMCPY(seed, sr, RAN_LEN);
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438 | XMEMCPY(seed + RAN_LEN, cr, RAN_LEN);
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439 |
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440 | return PRF(key_data, keyLen, ms, msLen, key_label, KEY_LABEL_SZ,
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441 | seed, SEED_LEN, tls1_2, hash_type);
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442 | }
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---|
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 */
|
---|