1 | /*
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2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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3 | *
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4 | * Licensed under the OpenSSL license (the "License"). You may not use
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5 | * this file except in compliance with the License. You can obtain a copy
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6 | * in the file LICENSE in the source distribution or at
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7 | * https://www.openssl.org/source/license.html
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8 | */
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9 |
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10 | /* ====================================================================
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11 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
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12 | *
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13 | * Portions of the attached software ("Contribution") are developed by
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14 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
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15 | *
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16 | * The Contribution is licensed pursuant to the OpenSSL open source
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17 | * license provided above.
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18 | *
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19 | * ECC cipher suite support in OpenSSL originally written by
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20 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
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21 | *
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22 | */
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23 | /* ====================================================================
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24 | * Copyright 2005 Nokia. All rights reserved.
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25 | *
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26 | * The portions of the attached software ("Contribution") is developed by
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27 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source
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28 | * license.
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29 | *
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30 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of
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31 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
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32 | * support (see RFC 4279) to OpenSSL.
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33 | *
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34 | * No patent licenses or other rights except those expressly stated in
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35 | * the OpenSSL open source license shall be deemed granted or received
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36 | * expressly, by implication, estoppel, or otherwise.
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37 | *
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38 | * No assurances are provided by Nokia that the Contribution does not
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39 | * infringe the patent or other intellectual property rights of any third
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40 | * party or that the license provides you with all the necessary rights
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41 | * to make use of the Contribution.
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42 | *
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43 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
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44 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
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45 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
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46 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
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47 | * OTHERWISE.
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48 | */
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49 |
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50 | #include <stdio.h>
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51 | #include "../ssl_locl.h"
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52 | #include "statem_locl.h"
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53 | #include <openssl/buffer.h>
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54 | #include <openssl/rand.h>
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55 | #include <openssl/objects.h>
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56 | #include <openssl/evp.h>
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57 | #include <openssl/md5.h>
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58 | #include <openssl/dh.h>
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59 | #include <openssl/bn.h>
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60 | #include <openssl/engine.h>
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61 |
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62 | static ossl_inline int cert_req_allowed(SSL *s);
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63 | static int key_exchange_expected(SSL *s);
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64 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b);
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65 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk,
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66 | unsigned char *p);
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67 |
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68 | /*
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69 | * Is a CertificateRequest message allowed at the moment or not?
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70 | *
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71 | * Return values are:
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72 | * 1: Yes
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73 | * 0: No
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74 | */
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75 | static ossl_inline int cert_req_allowed(SSL *s)
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76 | {
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77 | /* TLS does not like anon-DH with client cert */
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78 | if ((s->version > SSL3_VERSION
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79 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL))
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80 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK)))
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81 | return 0;
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82 |
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83 | return 1;
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84 | }
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85 |
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86 | /*
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87 | * Should we expect the ServerKeyExchange message or not?
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88 | *
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89 | * Return values are:
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90 | * 1: Yes
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91 | * 0: No
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92 | */
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93 | static int key_exchange_expected(SSL *s)
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94 | {
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95 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
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96 |
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97 | /*
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98 | * Can't skip server key exchange if this is an ephemeral
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99 | * ciphersuite or for SRP
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100 | */
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101 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK
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102 | | SSL_kSRP)) {
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103 | return 1;
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104 | }
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105 |
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106 | return 0;
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107 | }
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108 |
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109 | /*
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110 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed
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111 | * handshake state transitions when the client is reading messages from the
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112 | * server. The message type that the server has sent is provided in |mt|. The
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113 | * current state is in |s->statem.hand_state|.
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114 | *
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115 | * Return values are:
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116 | * 1: Success (transition allowed)
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117 | * 0: Error (transition not allowed)
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118 | */
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119 | int ossl_statem_client_read_transition(SSL *s, int mt)
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120 | {
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121 | OSSL_STATEM *st = &s->statem;
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122 | int ske_expected;
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123 |
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124 | switch (st->hand_state) {
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125 | case TLS_ST_CW_CLNT_HELLO:
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126 | if (mt == SSL3_MT_SERVER_HELLO) {
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127 | st->hand_state = TLS_ST_CR_SRVR_HELLO;
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128 | return 1;
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129 | }
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130 |
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131 | if (SSL_IS_DTLS(s)) {
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132 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
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133 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
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134 | return 1;
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135 | }
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136 | }
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137 | break;
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138 |
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139 | case TLS_ST_CR_SRVR_HELLO:
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140 | if (s->hit) {
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141 | if (s->tlsext_ticket_expected) {
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142 | if (mt == SSL3_MT_NEWSESSION_TICKET) {
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143 | st->hand_state = TLS_ST_CR_SESSION_TICKET;
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144 | return 1;
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145 | }
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146 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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147 | st->hand_state = TLS_ST_CR_CHANGE;
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148 | return 1;
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149 | }
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150 | } else {
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151 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) {
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152 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST;
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153 | return 1;
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154 | } else if (s->version >= TLS1_VERSION
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155 | && s->tls_session_secret_cb != NULL
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156 | && s->session->tlsext_tick != NULL
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157 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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158 | /*
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159 | * Normally, we can tell if the server is resuming the session
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160 | * from the session ID. EAP-FAST (RFC 4851), however, relies on
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161 | * the next server message after the ServerHello to determine if
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162 | * the server is resuming.
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163 | */
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164 | s->hit = 1;
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165 | st->hand_state = TLS_ST_CR_CHANGE;
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166 | return 1;
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167 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth
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168 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) {
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169 | if (mt == SSL3_MT_CERTIFICATE) {
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170 | st->hand_state = TLS_ST_CR_CERT;
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171 | return 1;
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172 | }
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173 | } else {
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174 | ske_expected = key_exchange_expected(s);
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175 | /* SKE is optional for some PSK ciphersuites */
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176 | if (ske_expected
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177 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
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178 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
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179 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
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180 | st->hand_state = TLS_ST_CR_KEY_EXCH;
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181 | return 1;
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182 | }
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183 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST
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184 | && cert_req_allowed(s)) {
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185 | st->hand_state = TLS_ST_CR_CERT_REQ;
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186 | return 1;
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187 | } else if (mt == SSL3_MT_SERVER_DONE) {
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188 | st->hand_state = TLS_ST_CR_SRVR_DONE;
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189 | return 1;
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190 | }
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191 | }
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192 | }
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193 | break;
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194 |
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195 | case TLS_ST_CR_CERT:
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196 | /*
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197 | * The CertificateStatus message is optional even if
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198 | * |tlsext_status_expected| is set
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199 | */
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200 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) {
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201 | st->hand_state = TLS_ST_CR_CERT_STATUS;
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202 | return 1;
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203 | }
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204 | /* Fall through */
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205 |
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206 | case TLS_ST_CR_CERT_STATUS:
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207 | ske_expected = key_exchange_expected(s);
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208 | /* SKE is optional for some PSK ciphersuites */
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209 | if (ske_expected || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK)
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210 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) {
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211 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) {
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212 | st->hand_state = TLS_ST_CR_KEY_EXCH;
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213 | return 1;
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214 | }
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215 | goto err;
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216 | }
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217 | /* Fall through */
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218 |
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219 | case TLS_ST_CR_KEY_EXCH:
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220 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) {
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221 | if (cert_req_allowed(s)) {
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222 | st->hand_state = TLS_ST_CR_CERT_REQ;
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223 | return 1;
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224 | }
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225 | goto err;
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226 | }
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227 | /* Fall through */
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228 |
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229 | case TLS_ST_CR_CERT_REQ:
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230 | if (mt == SSL3_MT_SERVER_DONE) {
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231 | st->hand_state = TLS_ST_CR_SRVR_DONE;
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232 | return 1;
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233 | }
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234 | break;
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235 |
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236 | case TLS_ST_CW_FINISHED:
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237 | if (s->tlsext_ticket_expected) {
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238 | if (mt == SSL3_MT_NEWSESSION_TICKET) {
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239 | st->hand_state = TLS_ST_CR_SESSION_TICKET;
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240 | return 1;
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241 | }
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242 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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243 | st->hand_state = TLS_ST_CR_CHANGE;
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244 | return 1;
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245 | }
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246 | break;
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247 |
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248 | case TLS_ST_CR_SESSION_TICKET:
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249 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) {
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250 | st->hand_state = TLS_ST_CR_CHANGE;
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251 | return 1;
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252 | }
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253 | break;
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254 |
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255 | case TLS_ST_CR_CHANGE:
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256 | if (mt == SSL3_MT_FINISHED) {
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257 | st->hand_state = TLS_ST_CR_FINISHED;
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258 | return 1;
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259 | }
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260 | break;
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261 |
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262 | default:
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263 | break;
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264 | }
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265 |
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266 | err:
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267 | /* No valid transition found */
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268 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_UNEXPECTED_MESSAGE);
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269 | SSLerr(SSL_F_OSSL_STATEM_CLIENT_READ_TRANSITION, SSL_R_UNEXPECTED_MESSAGE);
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270 | return 0;
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271 | }
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272 |
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273 | /*
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274 | * client_write_transition() works out what handshake state to move to next
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275 | * when the client is writing messages to be sent to the server.
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276 | */
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277 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s)
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278 | {
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279 | OSSL_STATEM *st = &s->statem;
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280 |
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281 | switch (st->hand_state) {
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282 | case TLS_ST_OK:
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283 | /* Renegotiation - fall through */
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284 | case TLS_ST_BEFORE:
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285 | st->hand_state = TLS_ST_CW_CLNT_HELLO;
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286 | return WRITE_TRAN_CONTINUE;
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287 |
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288 | case TLS_ST_CW_CLNT_HELLO:
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289 | /*
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290 | * No transition at the end of writing because we don't know what
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291 | * we will be sent
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292 | */
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293 | return WRITE_TRAN_FINISHED;
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294 |
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295 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
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296 | st->hand_state = TLS_ST_CW_CLNT_HELLO;
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297 | return WRITE_TRAN_CONTINUE;
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298 |
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299 | case TLS_ST_CR_SRVR_DONE:
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300 | if (s->s3->tmp.cert_req)
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301 | st->hand_state = TLS_ST_CW_CERT;
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302 | else
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303 | st->hand_state = TLS_ST_CW_KEY_EXCH;
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304 | return WRITE_TRAN_CONTINUE;
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305 |
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306 | case TLS_ST_CW_CERT:
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307 | st->hand_state = TLS_ST_CW_KEY_EXCH;
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308 | return WRITE_TRAN_CONTINUE;
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309 |
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310 | case TLS_ST_CW_KEY_EXCH:
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311 | /*
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312 | * For TLS, cert_req is set to 2, so a cert chain of nothing is
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313 | * sent, but no verify packet is sent
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314 | */
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315 | /*
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316 | * XXX: For now, we do not support client authentication in ECDH
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317 | * cipher suites with ECDH (rather than ECDSA) certificates. We
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318 | * need to skip the certificate verify message when client's
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319 | * ECDH public key is sent inside the client certificate.
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320 | */
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321 | if (s->s3->tmp.cert_req == 1) {
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322 | st->hand_state = TLS_ST_CW_CERT_VRFY;
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323 | } else {
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324 | st->hand_state = TLS_ST_CW_CHANGE;
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325 | }
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326 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) {
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327 | st->hand_state = TLS_ST_CW_CHANGE;
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328 | }
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329 | return WRITE_TRAN_CONTINUE;
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330 |
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331 | case TLS_ST_CW_CERT_VRFY:
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332 | st->hand_state = TLS_ST_CW_CHANGE;
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333 | return WRITE_TRAN_CONTINUE;
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334 |
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335 | case TLS_ST_CW_CHANGE:
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336 | #if defined(OPENSSL_NO_NEXTPROTONEG)
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337 | st->hand_state = TLS_ST_CW_FINISHED;
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338 | #else
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339 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen)
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340 | st->hand_state = TLS_ST_CW_NEXT_PROTO;
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341 | else
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342 | st->hand_state = TLS_ST_CW_FINISHED;
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343 | #endif
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344 | return WRITE_TRAN_CONTINUE;
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345 |
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346 | #if !defined(OPENSSL_NO_NEXTPROTONEG)
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347 | case TLS_ST_CW_NEXT_PROTO:
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348 | st->hand_state = TLS_ST_CW_FINISHED;
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349 | return WRITE_TRAN_CONTINUE;
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350 | #endif
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351 |
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352 | case TLS_ST_CW_FINISHED:
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353 | if (s->hit) {
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354 | st->hand_state = TLS_ST_OK;
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355 | ossl_statem_set_in_init(s, 0);
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356 | return WRITE_TRAN_CONTINUE;
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357 | } else {
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358 | return WRITE_TRAN_FINISHED;
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359 | }
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360 |
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361 | case TLS_ST_CR_FINISHED:
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362 | if (s->hit) {
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363 | st->hand_state = TLS_ST_CW_CHANGE;
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364 | return WRITE_TRAN_CONTINUE;
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365 | } else {
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366 | st->hand_state = TLS_ST_OK;
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367 | ossl_statem_set_in_init(s, 0);
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368 | return WRITE_TRAN_CONTINUE;
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369 | }
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370 |
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371 | default:
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372 | /* Shouldn't happen */
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373 | return WRITE_TRAN_ERROR;
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374 | }
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375 | }
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376 |
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377 | /*
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378 | * Perform any pre work that needs to be done prior to sending a message from
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379 | * the client to the server.
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380 | */
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381 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst)
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382 | {
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383 | OSSL_STATEM *st = &s->statem;
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384 |
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385 | switch (st->hand_state) {
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386 | case TLS_ST_CW_CLNT_HELLO:
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387 | s->shutdown = 0;
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388 | if (SSL_IS_DTLS(s)) {
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389 | /* every DTLS ClientHello resets Finished MAC */
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390 | if (!ssl3_init_finished_mac(s)) {
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391 | ossl_statem_set_error(s);
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392 | return WORK_ERROR;
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393 | }
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394 | }
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395 | break;
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396 |
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397 | case TLS_ST_CW_CHANGE:
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398 | if (SSL_IS_DTLS(s)) {
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399 | if (s->hit) {
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400 | /*
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401 | * We're into the last flight so we don't retransmit these
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402 | * messages unless we need to.
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403 | */
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404 | st->use_timer = 0;
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405 | }
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406 | #ifndef OPENSSL_NO_SCTP
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407 | if (BIO_dgram_is_sctp(SSL_get_wbio(s)))
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408 | return dtls_wait_for_dry(s);
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409 | #endif
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410 | }
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411 | return WORK_FINISHED_CONTINUE;
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412 |
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413 | case TLS_ST_OK:
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414 | return tls_finish_handshake(s, wst);
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415 |
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416 | default:
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417 | /* No pre work to be done */
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418 | break;
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419 | }
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420 |
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421 | return WORK_FINISHED_CONTINUE;
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422 | }
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423 |
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424 | /*
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425 | * Perform any work that needs to be done after sending a message from the
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426 | * client to the server.
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427 | */
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428 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst)
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429 | {
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430 | OSSL_STATEM *st = &s->statem;
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431 |
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432 | s->init_num = 0;
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433 |
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434 | switch (st->hand_state) {
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435 | case TLS_ST_CW_CLNT_HELLO:
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436 | if (wst == WORK_MORE_A && statem_flush(s) != 1)
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437 | return WORK_MORE_A;
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438 |
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439 | if (SSL_IS_DTLS(s)) {
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440 | /* Treat the next message as the first packet */
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441 | s->first_packet = 1;
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442 | }
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443 | break;
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444 |
|
---|
445 | case TLS_ST_CW_KEY_EXCH:
|
---|
446 | if (tls_client_key_exchange_post_work(s) == 0)
|
---|
447 | return WORK_ERROR;
|
---|
448 | break;
|
---|
449 |
|
---|
450 | case TLS_ST_CW_CHANGE:
|
---|
451 | s->session->cipher = s->s3->tmp.new_cipher;
|
---|
452 | #ifdef OPENSSL_NO_COMP
|
---|
453 | s->session->compress_meth = 0;
|
---|
454 | #else
|
---|
455 | if (s->s3->tmp.new_compression == NULL)
|
---|
456 | s->session->compress_meth = 0;
|
---|
457 | else
|
---|
458 | s->session->compress_meth = s->s3->tmp.new_compression->id;
|
---|
459 | #endif
|
---|
460 | if (!s->method->ssl3_enc->setup_key_block(s))
|
---|
461 | return WORK_ERROR;
|
---|
462 |
|
---|
463 | if (!s->method->ssl3_enc->change_cipher_state(s,
|
---|
464 | SSL3_CHANGE_CIPHER_CLIENT_WRITE))
|
---|
465 | return WORK_ERROR;
|
---|
466 |
|
---|
467 | if (SSL_IS_DTLS(s)) {
|
---|
468 | #ifndef OPENSSL_NO_SCTP
|
---|
469 | if (s->hit) {
|
---|
470 | /*
|
---|
471 | * Change to new shared key of SCTP-Auth, will be ignored if
|
---|
472 | * no SCTP used.
|
---|
473 | */
|
---|
474 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
---|
475 | 0, NULL);
|
---|
476 | }
|
---|
477 | #endif
|
---|
478 |
|
---|
479 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE);
|
---|
480 | }
|
---|
481 | break;
|
---|
482 |
|
---|
483 | case TLS_ST_CW_FINISHED:
|
---|
484 | #ifndef OPENSSL_NO_SCTP
|
---|
485 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) {
|
---|
486 | /*
|
---|
487 | * Change to new shared key of SCTP-Auth, will be ignored if
|
---|
488 | * no SCTP used.
|
---|
489 | */
|
---|
490 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY,
|
---|
491 | 0, NULL);
|
---|
492 | }
|
---|
493 | #endif
|
---|
494 | if (statem_flush(s) != 1)
|
---|
495 | return WORK_MORE_B;
|
---|
496 | break;
|
---|
497 |
|
---|
498 | default:
|
---|
499 | /* No post work to be done */
|
---|
500 | break;
|
---|
501 | }
|
---|
502 |
|
---|
503 | return WORK_FINISHED_CONTINUE;
|
---|
504 | }
|
---|
505 |
|
---|
506 | /*
|
---|
507 | * Construct a message to be sent from the client to the server.
|
---|
508 | *
|
---|
509 | * Valid return values are:
|
---|
510 | * 1: Success
|
---|
511 | * 0: Error
|
---|
512 | */
|
---|
513 | int ossl_statem_client_construct_message(SSL *s)
|
---|
514 | {
|
---|
515 | OSSL_STATEM *st = &s->statem;
|
---|
516 |
|
---|
517 | switch (st->hand_state) {
|
---|
518 | case TLS_ST_CW_CLNT_HELLO:
|
---|
519 | return tls_construct_client_hello(s);
|
---|
520 |
|
---|
521 | case TLS_ST_CW_CERT:
|
---|
522 | return tls_construct_client_certificate(s);
|
---|
523 |
|
---|
524 | case TLS_ST_CW_KEY_EXCH:
|
---|
525 | return tls_construct_client_key_exchange(s);
|
---|
526 |
|
---|
527 | case TLS_ST_CW_CERT_VRFY:
|
---|
528 | return tls_construct_client_verify(s);
|
---|
529 |
|
---|
530 | case TLS_ST_CW_CHANGE:
|
---|
531 | if (SSL_IS_DTLS(s))
|
---|
532 | return dtls_construct_change_cipher_spec(s);
|
---|
533 | else
|
---|
534 | return tls_construct_change_cipher_spec(s);
|
---|
535 |
|
---|
536 | #if !defined(OPENSSL_NO_NEXTPROTONEG)
|
---|
537 | case TLS_ST_CW_NEXT_PROTO:
|
---|
538 | return tls_construct_next_proto(s);
|
---|
539 | #endif
|
---|
540 | case TLS_ST_CW_FINISHED:
|
---|
541 | return tls_construct_finished(s,
|
---|
542 | s->method->
|
---|
543 | ssl3_enc->client_finished_label,
|
---|
544 | s->method->
|
---|
545 | ssl3_enc->client_finished_label_len);
|
---|
546 |
|
---|
547 | default:
|
---|
548 | /* Shouldn't happen */
|
---|
549 | break;
|
---|
550 | }
|
---|
551 |
|
---|
552 | return 0;
|
---|
553 | }
|
---|
554 |
|
---|
555 | /*
|
---|
556 | * Returns the maximum allowed length for the current message that we are
|
---|
557 | * reading. Excludes the message header.
|
---|
558 | */
|
---|
559 | unsigned long ossl_statem_client_max_message_size(SSL *s)
|
---|
560 | {
|
---|
561 | OSSL_STATEM *st = &s->statem;
|
---|
562 |
|
---|
563 | switch (st->hand_state) {
|
---|
564 | case TLS_ST_CR_SRVR_HELLO:
|
---|
565 | return SERVER_HELLO_MAX_LENGTH;
|
---|
566 |
|
---|
567 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
|
---|
568 | return HELLO_VERIFY_REQUEST_MAX_LENGTH;
|
---|
569 |
|
---|
570 | case TLS_ST_CR_CERT:
|
---|
571 | return s->max_cert_list;
|
---|
572 |
|
---|
573 | case TLS_ST_CR_CERT_STATUS:
|
---|
574 | return SSL3_RT_MAX_PLAIN_LENGTH;
|
---|
575 |
|
---|
576 | case TLS_ST_CR_KEY_EXCH:
|
---|
577 | return SERVER_KEY_EXCH_MAX_LENGTH;
|
---|
578 |
|
---|
579 | case TLS_ST_CR_CERT_REQ:
|
---|
580 | /*
|
---|
581 | * Set to s->max_cert_list for compatibility with previous releases. In
|
---|
582 | * practice these messages can get quite long if servers are configured
|
---|
583 | * to provide a long list of acceptable CAs
|
---|
584 | */
|
---|
585 | return s->max_cert_list;
|
---|
586 |
|
---|
587 | case TLS_ST_CR_SRVR_DONE:
|
---|
588 | return SERVER_HELLO_DONE_MAX_LENGTH;
|
---|
589 |
|
---|
590 | case TLS_ST_CR_CHANGE:
|
---|
591 | if (s->version == DTLS1_BAD_VER)
|
---|
592 | return 3;
|
---|
593 | return CCS_MAX_LENGTH;
|
---|
594 |
|
---|
595 | case TLS_ST_CR_SESSION_TICKET:
|
---|
596 | return SSL3_RT_MAX_PLAIN_LENGTH;
|
---|
597 |
|
---|
598 | case TLS_ST_CR_FINISHED:
|
---|
599 | return FINISHED_MAX_LENGTH;
|
---|
600 |
|
---|
601 | default:
|
---|
602 | /* Shouldn't happen */
|
---|
603 | break;
|
---|
604 | }
|
---|
605 |
|
---|
606 | return 0;
|
---|
607 | }
|
---|
608 |
|
---|
609 | /*
|
---|
610 | * Process a message that the client has been received from the server.
|
---|
611 | */
|
---|
612 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt)
|
---|
613 | {
|
---|
614 | OSSL_STATEM *st = &s->statem;
|
---|
615 |
|
---|
616 | switch (st->hand_state) {
|
---|
617 | case TLS_ST_CR_SRVR_HELLO:
|
---|
618 | return tls_process_server_hello(s, pkt);
|
---|
619 |
|
---|
620 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST:
|
---|
621 | return dtls_process_hello_verify(s, pkt);
|
---|
622 |
|
---|
623 | case TLS_ST_CR_CERT:
|
---|
624 | return tls_process_server_certificate(s, pkt);
|
---|
625 |
|
---|
626 | case TLS_ST_CR_CERT_STATUS:
|
---|
627 | return tls_process_cert_status(s, pkt);
|
---|
628 |
|
---|
629 | case TLS_ST_CR_KEY_EXCH:
|
---|
630 | return tls_process_key_exchange(s, pkt);
|
---|
631 |
|
---|
632 | case TLS_ST_CR_CERT_REQ:
|
---|
633 | return tls_process_certificate_request(s, pkt);
|
---|
634 |
|
---|
635 | case TLS_ST_CR_SRVR_DONE:
|
---|
636 | return tls_process_server_done(s, pkt);
|
---|
637 |
|
---|
638 | case TLS_ST_CR_CHANGE:
|
---|
639 | return tls_process_change_cipher_spec(s, pkt);
|
---|
640 |
|
---|
641 | case TLS_ST_CR_SESSION_TICKET:
|
---|
642 | return tls_process_new_session_ticket(s, pkt);
|
---|
643 |
|
---|
644 | case TLS_ST_CR_FINISHED:
|
---|
645 | return tls_process_finished(s, pkt);
|
---|
646 |
|
---|
647 | default:
|
---|
648 | /* Shouldn't happen */
|
---|
649 | break;
|
---|
650 | }
|
---|
651 |
|
---|
652 | return MSG_PROCESS_ERROR;
|
---|
653 | }
|
---|
654 |
|
---|
655 | /*
|
---|
656 | * Perform any further processing required following the receipt of a message
|
---|
657 | * from the server
|
---|
658 | */
|
---|
659 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst)
|
---|
660 | {
|
---|
661 | OSSL_STATEM *st = &s->statem;
|
---|
662 |
|
---|
663 | switch (st->hand_state) {
|
---|
664 | case TLS_ST_CR_CERT_REQ:
|
---|
665 | return tls_prepare_client_certificate(s, wst);
|
---|
666 |
|
---|
667 | #ifndef OPENSSL_NO_SCTP
|
---|
668 | case TLS_ST_CR_SRVR_DONE:
|
---|
669 | /* We only get here if we are using SCTP and we are renegotiating */
|
---|
670 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) {
|
---|
671 | s->s3->in_read_app_data = 2;
|
---|
672 | s->rwstate = SSL_READING;
|
---|
673 | BIO_clear_retry_flags(SSL_get_rbio(s));
|
---|
674 | BIO_set_retry_read(SSL_get_rbio(s));
|
---|
675 | ossl_statem_set_sctp_read_sock(s, 1);
|
---|
676 | return WORK_MORE_A;
|
---|
677 | }
|
---|
678 | ossl_statem_set_sctp_read_sock(s, 0);
|
---|
679 | return WORK_FINISHED_STOP;
|
---|
680 | #endif
|
---|
681 |
|
---|
682 | default:
|
---|
683 | break;
|
---|
684 | }
|
---|
685 |
|
---|
686 | /* Shouldn't happen */
|
---|
687 | return WORK_ERROR;
|
---|
688 | }
|
---|
689 |
|
---|
690 | int tls_construct_client_hello(SSL *s)
|
---|
691 | {
|
---|
692 | unsigned char *buf;
|
---|
693 | unsigned char *p, *d;
|
---|
694 | int i;
|
---|
695 | int protverr;
|
---|
696 | unsigned long l;
|
---|
697 | int al = 0;
|
---|
698 | #ifndef OPENSSL_NO_COMP
|
---|
699 | int j;
|
---|
700 | SSL_COMP *comp;
|
---|
701 | #endif
|
---|
702 | SSL_SESSION *sess = s->session;
|
---|
703 |
|
---|
704 | buf = (unsigned char *)s->init_buf->data;
|
---|
705 |
|
---|
706 | /* Work out what SSL/TLS/DTLS version to use */
|
---|
707 | protverr = ssl_set_client_hello_version(s);
|
---|
708 | if (protverr != 0) {
|
---|
709 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr);
|
---|
710 | goto err;
|
---|
711 | }
|
---|
712 |
|
---|
713 | if ((sess == NULL) || !ssl_version_supported(s, sess->ssl_version) ||
|
---|
714 | /*
|
---|
715 | * In the case of EAP-FAST, we can have a pre-shared
|
---|
716 | * "ticket" without a session ID.
|
---|
717 | */
|
---|
718 | (!sess->session_id_length && !sess->tlsext_tick) ||
|
---|
719 | (sess->not_resumable)) {
|
---|
720 | if (!ssl_get_new_session(s, 0))
|
---|
721 | goto err;
|
---|
722 | }
|
---|
723 | /* else use the pre-loaded session */
|
---|
724 |
|
---|
725 | p = s->s3->client_random;
|
---|
726 |
|
---|
727 | /*
|
---|
728 | * for DTLS if client_random is initialized, reuse it, we are
|
---|
729 | * required to use same upon reply to HelloVerify
|
---|
730 | */
|
---|
731 | if (SSL_IS_DTLS(s)) {
|
---|
732 | size_t idx;
|
---|
733 | i = 1;
|
---|
734 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) {
|
---|
735 | if (p[idx]) {
|
---|
736 | i = 0;
|
---|
737 | break;
|
---|
738 | }
|
---|
739 | }
|
---|
740 | } else
|
---|
741 | i = 1;
|
---|
742 |
|
---|
743 | if (i && ssl_fill_hello_random(s, 0, p, sizeof(s->s3->client_random)) <= 0)
|
---|
744 | goto err;
|
---|
745 |
|
---|
746 | /* Do the message type and length last */
|
---|
747 | d = p = ssl_handshake_start(s);
|
---|
748 |
|
---|
749 | /*-
|
---|
750 | * version indicates the negotiated version: for example from
|
---|
751 | * an SSLv2/v3 compatible client hello). The client_version
|
---|
752 | * field is the maximum version we permit and it is also
|
---|
753 | * used in RSA encrypted premaster secrets. Some servers can
|
---|
754 | * choke if we initially report a higher version then
|
---|
755 | * renegotiate to a lower one in the premaster secret. This
|
---|
756 | * didn't happen with TLS 1.0 as most servers supported it
|
---|
757 | * but it can with TLS 1.1 or later if the server only supports
|
---|
758 | * 1.0.
|
---|
759 | *
|
---|
760 | * Possible scenario with previous logic:
|
---|
761 | * 1. Client hello indicates TLS 1.2
|
---|
762 | * 2. Server hello says TLS 1.0
|
---|
763 | * 3. RSA encrypted premaster secret uses 1.2.
|
---|
764 | * 4. Handshake proceeds using TLS 1.0.
|
---|
765 | * 5. Server sends hello request to renegotiate.
|
---|
766 | * 6. Client hello indicates TLS v1.0 as we now
|
---|
767 | * know that is maximum server supports.
|
---|
768 | * 7. Server chokes on RSA encrypted premaster secret
|
---|
769 | * containing version 1.0.
|
---|
770 | *
|
---|
771 | * For interoperability it should be OK to always use the
|
---|
772 | * maximum version we support in client hello and then rely
|
---|
773 | * on the checking of version to ensure the servers isn't
|
---|
774 | * being inconsistent: for example initially negotiating with
|
---|
775 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
|
---|
776 | * client_version in client hello and not resetting it to
|
---|
777 | * the negotiated version.
|
---|
778 | */
|
---|
779 | *(p++) = s->client_version >> 8;
|
---|
780 | *(p++) = s->client_version & 0xff;
|
---|
781 |
|
---|
782 | /* Random stuff */
|
---|
783 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
|
---|
784 | p += SSL3_RANDOM_SIZE;
|
---|
785 |
|
---|
786 | /* Session ID */
|
---|
787 | if (s->new_session)
|
---|
788 | i = 0;
|
---|
789 | else
|
---|
790 | i = s->session->session_id_length;
|
---|
791 | *(p++) = i;
|
---|
792 | if (i != 0) {
|
---|
793 | if (i > (int)sizeof(s->session->session_id)) {
|
---|
794 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
795 | goto err;
|
---|
796 | }
|
---|
797 | memcpy(p, s->session->session_id, i);
|
---|
798 | p += i;
|
---|
799 | }
|
---|
800 |
|
---|
801 | /* cookie stuff for DTLS */
|
---|
802 | if (SSL_IS_DTLS(s)) {
|
---|
803 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) {
|
---|
804 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
805 | goto err;
|
---|
806 | }
|
---|
807 | *(p++) = s->d1->cookie_len;
|
---|
808 | memcpy(p, s->d1->cookie, s->d1->cookie_len);
|
---|
809 | p += s->d1->cookie_len;
|
---|
810 | }
|
---|
811 |
|
---|
812 | /* Ciphers supported */
|
---|
813 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]));
|
---|
814 | if (i == 0) {
|
---|
815 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE);
|
---|
816 | goto err;
|
---|
817 | }
|
---|
818 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
|
---|
819 | /*
|
---|
820 | * Some servers hang if client hello > 256 bytes as hack workaround
|
---|
821 | * chop number of supported ciphers to keep it well below this if we
|
---|
822 | * use TLS v1.2
|
---|
823 | */
|
---|
824 | if (TLS1_get_version(s) >= TLS1_2_VERSION
|
---|
825 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
|
---|
826 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
|
---|
827 | #endif
|
---|
828 | s2n(i, p);
|
---|
829 | p += i;
|
---|
830 |
|
---|
831 | /* COMPRESSION */
|
---|
832 | #ifdef OPENSSL_NO_COMP
|
---|
833 | *(p++) = 1;
|
---|
834 | #else
|
---|
835 |
|
---|
836 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
|
---|
837 | j = 0;
|
---|
838 | else
|
---|
839 | j = sk_SSL_COMP_num(s->ctx->comp_methods);
|
---|
840 | *(p++) = 1 + j;
|
---|
841 | for (i = 0; i < j; i++) {
|
---|
842 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i);
|
---|
843 | *(p++) = comp->id;
|
---|
844 | }
|
---|
845 | #endif
|
---|
846 | *(p++) = 0; /* Add the NULL method */
|
---|
847 |
|
---|
848 | /* TLS extensions */
|
---|
849 | if (ssl_prepare_clienthello_tlsext(s) <= 0) {
|
---|
850 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT);
|
---|
851 | goto err;
|
---|
852 | }
|
---|
853 | if ((p =
|
---|
854 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH,
|
---|
855 | &al)) == NULL) {
|
---|
856 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
857 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
858 | goto err;
|
---|
859 | }
|
---|
860 |
|
---|
861 | l = p - d;
|
---|
862 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) {
|
---|
863 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
864 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
865 | goto err;
|
---|
866 | }
|
---|
867 |
|
---|
868 | return 1;
|
---|
869 | err:
|
---|
870 | ossl_statem_set_error(s);
|
---|
871 | return 0;
|
---|
872 | }
|
---|
873 |
|
---|
874 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt)
|
---|
875 | {
|
---|
876 | int al;
|
---|
877 | unsigned int cookie_len;
|
---|
878 | PACKET cookiepkt;
|
---|
879 |
|
---|
880 | if (!PACKET_forward(pkt, 2)
|
---|
881 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) {
|
---|
882 | al = SSL_AD_DECODE_ERROR;
|
---|
883 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
|
---|
884 | goto f_err;
|
---|
885 | }
|
---|
886 |
|
---|
887 | cookie_len = PACKET_remaining(&cookiepkt);
|
---|
888 | if (cookie_len > sizeof(s->d1->cookie)) {
|
---|
889 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
890 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG);
|
---|
891 | goto f_err;
|
---|
892 | }
|
---|
893 |
|
---|
894 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) {
|
---|
895 | al = SSL_AD_DECODE_ERROR;
|
---|
896 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH);
|
---|
897 | goto f_err;
|
---|
898 | }
|
---|
899 | s->d1->cookie_len = cookie_len;
|
---|
900 |
|
---|
901 | return MSG_PROCESS_FINISHED_READING;
|
---|
902 | f_err:
|
---|
903 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
904 | ossl_statem_set_error(s);
|
---|
905 | return MSG_PROCESS_ERROR;
|
---|
906 | }
|
---|
907 |
|
---|
908 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt)
|
---|
909 | {
|
---|
910 | STACK_OF(SSL_CIPHER) *sk;
|
---|
911 | const SSL_CIPHER *c;
|
---|
912 | PACKET session_id;
|
---|
913 | size_t session_id_len;
|
---|
914 | const unsigned char *cipherchars;
|
---|
915 | int i, al = SSL_AD_INTERNAL_ERROR;
|
---|
916 | unsigned int compression;
|
---|
917 | unsigned int sversion;
|
---|
918 | int protverr;
|
---|
919 | #ifndef OPENSSL_NO_COMP
|
---|
920 | SSL_COMP *comp;
|
---|
921 | #endif
|
---|
922 |
|
---|
923 | if (!PACKET_get_net_2(pkt, &sversion)) {
|
---|
924 | al = SSL_AD_DECODE_ERROR;
|
---|
925 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
926 | goto f_err;
|
---|
927 | }
|
---|
928 |
|
---|
929 | protverr = ssl_choose_client_version(s, sversion);
|
---|
930 | if (protverr != 0) {
|
---|
931 | al = SSL_AD_PROTOCOL_VERSION;
|
---|
932 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr);
|
---|
933 | goto f_err;
|
---|
934 | }
|
---|
935 |
|
---|
936 | /* load the server hello data */
|
---|
937 | /* load the server random */
|
---|
938 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) {
|
---|
939 | al = SSL_AD_DECODE_ERROR;
|
---|
940 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
941 | goto f_err;
|
---|
942 | }
|
---|
943 |
|
---|
944 | s->hit = 0;
|
---|
945 |
|
---|
946 | /* Get the session-id. */
|
---|
947 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) {
|
---|
948 | al = SSL_AD_DECODE_ERROR;
|
---|
949 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
950 | goto f_err;
|
---|
951 | }
|
---|
952 | session_id_len = PACKET_remaining(&session_id);
|
---|
953 | if (session_id_len > sizeof s->session->session_id
|
---|
954 | || session_id_len > SSL3_SESSION_ID_SIZE) {
|
---|
955 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
956 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG);
|
---|
957 | goto f_err;
|
---|
958 | }
|
---|
959 |
|
---|
960 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) {
|
---|
961 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
962 | al = SSL_AD_DECODE_ERROR;
|
---|
963 | goto f_err;
|
---|
964 | }
|
---|
965 |
|
---|
966 | /*
|
---|
967 | * Check if we can resume the session based on external pre-shared secret.
|
---|
968 | * EAP-FAST (RFC 4851) supports two types of session resumption.
|
---|
969 | * Resumption based on server-side state works with session IDs.
|
---|
970 | * Resumption based on pre-shared Protected Access Credentials (PACs)
|
---|
971 | * works by overriding the SessionTicket extension at the application
|
---|
972 | * layer, and does not send a session ID. (We do not know whether EAP-FAST
|
---|
973 | * servers would honour the session ID.) Therefore, the session ID alone
|
---|
974 | * is not a reliable indicator of session resumption, so we first check if
|
---|
975 | * we can resume, and later peek at the next handshake message to see if the
|
---|
976 | * server wants to resume.
|
---|
977 | */
|
---|
978 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb &&
|
---|
979 | s->session->tlsext_tick) {
|
---|
980 | const SSL_CIPHER *pref_cipher = NULL;
|
---|
981 | s->session->master_key_length = sizeof(s->session->master_key);
|
---|
982 | if (s->tls_session_secret_cb(s, s->session->master_key,
|
---|
983 | &s->session->master_key_length,
|
---|
984 | NULL, &pref_cipher,
|
---|
985 | s->tls_session_secret_cb_arg)) {
|
---|
986 | s->session->cipher = pref_cipher ?
|
---|
987 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars);
|
---|
988 | } else {
|
---|
989 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR);
|
---|
990 | al = SSL_AD_INTERNAL_ERROR;
|
---|
991 | goto f_err;
|
---|
992 | }
|
---|
993 | }
|
---|
994 |
|
---|
995 | if (session_id_len != 0 && session_id_len == s->session->session_id_length
|
---|
996 | && memcmp(PACKET_data(&session_id), s->session->session_id,
|
---|
997 | session_id_len) == 0) {
|
---|
998 | if (s->sid_ctx_length != s->session->sid_ctx_length
|
---|
999 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) {
|
---|
1000 | /* actually a client application bug */
|
---|
1001 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1002 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1003 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
|
---|
1004 | goto f_err;
|
---|
1005 | }
|
---|
1006 | s->hit = 1;
|
---|
1007 | } else {
|
---|
1008 | /*
|
---|
1009 | * If we were trying for session-id reuse but the server
|
---|
1010 | * didn't echo the ID, make a new SSL_SESSION.
|
---|
1011 | * In the case of EAP-FAST and PAC, we do not send a session ID,
|
---|
1012 | * so the PAC-based session secret is always preserved. It'll be
|
---|
1013 | * overwritten if the server refuses resumption.
|
---|
1014 | */
|
---|
1015 | if (s->session->session_id_length > 0) {
|
---|
1016 | s->ctx->stats.sess_miss++;
|
---|
1017 | if (!ssl_get_new_session(s, 0)) {
|
---|
1018 | goto f_err;
|
---|
1019 | }
|
---|
1020 | }
|
---|
1021 |
|
---|
1022 | s->session->ssl_version = s->version;
|
---|
1023 | s->session->session_id_length = session_id_len;
|
---|
1024 | /* session_id_len could be 0 */
|
---|
1025 | if (session_id_len > 0)
|
---|
1026 | memcpy(s->session->session_id, PACKET_data(&session_id),
|
---|
1027 | session_id_len);
|
---|
1028 | }
|
---|
1029 |
|
---|
1030 | /* Session version and negotiated protocol version should match */
|
---|
1031 | if (s->version != s->session->ssl_version) {
|
---|
1032 | al = SSL_AD_PROTOCOL_VERSION;
|
---|
1033 |
|
---|
1034 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1035 | SSL_R_SSL_SESSION_VERSION_MISMATCH);
|
---|
1036 | goto f_err;
|
---|
1037 | }
|
---|
1038 |
|
---|
1039 | c = ssl_get_cipher_by_char(s, cipherchars);
|
---|
1040 | if (c == NULL) {
|
---|
1041 | /* unknown cipher */
|
---|
1042 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1043 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED);
|
---|
1044 | goto f_err;
|
---|
1045 | }
|
---|
1046 | /*
|
---|
1047 | * Now that we know the version, update the check to see if it's an allowed
|
---|
1048 | * version.
|
---|
1049 | */
|
---|
1050 | s->s3->tmp.min_ver = s->version;
|
---|
1051 | s->s3->tmp.max_ver = s->version;
|
---|
1052 | /*
|
---|
1053 | * If it is a disabled cipher we either didn't send it in client hello,
|
---|
1054 | * or it's not allowed for the selected protocol. So we return an error.
|
---|
1055 | */
|
---|
1056 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) {
|
---|
1057 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1058 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
|
---|
1059 | goto f_err;
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 | sk = ssl_get_ciphers_by_id(s);
|
---|
1063 | i = sk_SSL_CIPHER_find(sk, c);
|
---|
1064 | if (i < 0) {
|
---|
1065 | /* we did not say we would use this cipher */
|
---|
1066 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1067 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED);
|
---|
1068 | goto f_err;
|
---|
1069 | }
|
---|
1070 |
|
---|
1071 | /*
|
---|
1072 | * Depending on the session caching (internal/external), the cipher
|
---|
1073 | * and/or cipher_id values may not be set. Make sure that cipher_id is
|
---|
1074 | * set and use it for comparison.
|
---|
1075 | */
|
---|
1076 | if (s->session->cipher)
|
---|
1077 | s->session->cipher_id = s->session->cipher->id;
|
---|
1078 | if (s->hit && (s->session->cipher_id != c->id)) {
|
---|
1079 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1080 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1081 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
|
---|
1082 | goto f_err;
|
---|
1083 | }
|
---|
1084 | s->s3->tmp.new_cipher = c;
|
---|
1085 | /* lets get the compression algorithm */
|
---|
1086 | /* COMPRESSION */
|
---|
1087 | if (!PACKET_get_1(pkt, &compression)) {
|
---|
1088 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH);
|
---|
1089 | al = SSL_AD_DECODE_ERROR;
|
---|
1090 | goto f_err;
|
---|
1091 | }
|
---|
1092 | #ifdef OPENSSL_NO_COMP
|
---|
1093 | if (compression != 0) {
|
---|
1094 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1095 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1096 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
---|
1097 | goto f_err;
|
---|
1098 | }
|
---|
1099 | /*
|
---|
1100 | * If compression is disabled we'd better not try to resume a session
|
---|
1101 | * using compression.
|
---|
1102 | */
|
---|
1103 | if (s->session->compress_meth != 0) {
|
---|
1104 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION);
|
---|
1105 | goto f_err;
|
---|
1106 | }
|
---|
1107 | #else
|
---|
1108 | if (s->hit && compression != s->session->compress_meth) {
|
---|
1109 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1110 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1111 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
|
---|
1112 | goto f_err;
|
---|
1113 | }
|
---|
1114 | if (compression == 0)
|
---|
1115 | comp = NULL;
|
---|
1116 | else if (!ssl_allow_compression(s)) {
|
---|
1117 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1118 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED);
|
---|
1119 | goto f_err;
|
---|
1120 | } else {
|
---|
1121 | comp = ssl3_comp_find(s->ctx->comp_methods, compression);
|
---|
1122 | }
|
---|
1123 |
|
---|
1124 | if (compression != 0 && comp == NULL) {
|
---|
1125 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1126 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO,
|
---|
1127 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
|
---|
1128 | goto f_err;
|
---|
1129 | } else {
|
---|
1130 | s->s3->tmp.new_compression = comp;
|
---|
1131 | }
|
---|
1132 | #endif
|
---|
1133 |
|
---|
1134 | /* TLS extensions */
|
---|
1135 | if (!ssl_parse_serverhello_tlsext(s, pkt)) {
|
---|
1136 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT);
|
---|
1137 | goto err;
|
---|
1138 | }
|
---|
1139 |
|
---|
1140 | if (PACKET_remaining(pkt) != 0) {
|
---|
1141 | /* wrong packet length */
|
---|
1142 | al = SSL_AD_DECODE_ERROR;
|
---|
1143 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH);
|
---|
1144 | goto f_err;
|
---|
1145 | }
|
---|
1146 | #ifndef OPENSSL_NO_SCTP
|
---|
1147 | if (SSL_IS_DTLS(s) && s->hit) {
|
---|
1148 | unsigned char sctpauthkey[64];
|
---|
1149 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
|
---|
1150 |
|
---|
1151 | /*
|
---|
1152 | * Add new shared key for SCTP-Auth, will be ignored if
|
---|
1153 | * no SCTP used.
|
---|
1154 | */
|
---|
1155 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
|
---|
1156 | sizeof(DTLS1_SCTP_AUTH_LABEL));
|
---|
1157 |
|
---|
1158 | if (SSL_export_keying_material(s, sctpauthkey,
|
---|
1159 | sizeof(sctpauthkey),
|
---|
1160 | labelbuffer,
|
---|
1161 | sizeof(labelbuffer), NULL, 0, 0) <= 0)
|
---|
1162 | goto err;
|
---|
1163 |
|
---|
1164 | BIO_ctrl(SSL_get_wbio(s),
|
---|
1165 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
---|
1166 | sizeof(sctpauthkey), sctpauthkey);
|
---|
1167 | }
|
---|
1168 | #endif
|
---|
1169 |
|
---|
1170 | return MSG_PROCESS_CONTINUE_READING;
|
---|
1171 | f_err:
|
---|
1172 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
1173 | err:
|
---|
1174 | ossl_statem_set_error(s);
|
---|
1175 | return MSG_PROCESS_ERROR;
|
---|
1176 | }
|
---|
1177 |
|
---|
1178 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt)
|
---|
1179 | {
|
---|
1180 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx;
|
---|
1181 | unsigned long cert_list_len, cert_len;
|
---|
1182 | X509 *x = NULL;
|
---|
1183 | const unsigned char *certstart, *certbytes;
|
---|
1184 | STACK_OF(X509) *sk = NULL;
|
---|
1185 | EVP_PKEY *pkey = NULL;
|
---|
1186 |
|
---|
1187 | if ((sk = sk_X509_new_null()) == NULL) {
|
---|
1188 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
|
---|
1189 | goto err;
|
---|
1190 | }
|
---|
1191 |
|
---|
1192 | if (!PACKET_get_net_3(pkt, &cert_list_len)
|
---|
1193 | || PACKET_remaining(pkt) != cert_list_len) {
|
---|
1194 | al = SSL_AD_DECODE_ERROR;
|
---|
1195 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH);
|
---|
1196 | goto f_err;
|
---|
1197 | }
|
---|
1198 | while (PACKET_remaining(pkt)) {
|
---|
1199 | if (!PACKET_get_net_3(pkt, &cert_len)
|
---|
1200 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) {
|
---|
1201 | al = SSL_AD_DECODE_ERROR;
|
---|
1202 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1203 | SSL_R_CERT_LENGTH_MISMATCH);
|
---|
1204 | goto f_err;
|
---|
1205 | }
|
---|
1206 |
|
---|
1207 | certstart = certbytes;
|
---|
1208 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len);
|
---|
1209 | if (x == NULL) {
|
---|
1210 | al = SSL_AD_BAD_CERTIFICATE;
|
---|
1211 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB);
|
---|
1212 | goto f_err;
|
---|
1213 | }
|
---|
1214 | if (certbytes != (certstart + cert_len)) {
|
---|
1215 | al = SSL_AD_DECODE_ERROR;
|
---|
1216 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1217 | SSL_R_CERT_LENGTH_MISMATCH);
|
---|
1218 | goto f_err;
|
---|
1219 | }
|
---|
1220 | if (!sk_X509_push(sk, x)) {
|
---|
1221 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE);
|
---|
1222 | goto err;
|
---|
1223 | }
|
---|
1224 | x = NULL;
|
---|
1225 | }
|
---|
1226 |
|
---|
1227 | i = ssl_verify_cert_chain(s, sk);
|
---|
1228 | /*
|
---|
1229 | * The documented interface is that SSL_VERIFY_PEER should be set in order
|
---|
1230 | * for client side verification of the server certificate to take place.
|
---|
1231 | * However, historically the code has only checked that *any* flag is set
|
---|
1232 | * to cause server verification to take place. Use of the other flags makes
|
---|
1233 | * no sense in client mode. An attempt to clean up the semantics was
|
---|
1234 | * reverted because at least one application *only* set
|
---|
1235 | * SSL_VERIFY_FAIL_IF_NO_PEER_CERT. Prior to the clean up this still caused
|
---|
1236 | * server verification to take place, after the clean up it silently did
|
---|
1237 | * nothing. SSL_CTX_set_verify()/SSL_set_verify() cannot validate the flags
|
---|
1238 | * sent to them because they are void functions. Therefore, we now use the
|
---|
1239 | * (less clean) historic behaviour of performing validation if any flag is
|
---|
1240 | * set. The *documented* interface remains the same.
|
---|
1241 | */
|
---|
1242 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) {
|
---|
1243 | al = ssl_verify_alarm_type(s->verify_result);
|
---|
1244 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1245 | SSL_R_CERTIFICATE_VERIFY_FAILED);
|
---|
1246 | goto f_err;
|
---|
1247 | }
|
---|
1248 | ERR_clear_error(); /* but we keep s->verify_result */
|
---|
1249 | if (i > 1) {
|
---|
1250 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i);
|
---|
1251 | al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
1252 | goto f_err;
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | s->session->peer_chain = sk;
|
---|
1256 | /*
|
---|
1257 | * Inconsistency alert: cert_chain does include the peer's certificate,
|
---|
1258 | * which we don't include in statem_srvr.c
|
---|
1259 | */
|
---|
1260 | x = sk_X509_value(sk, 0);
|
---|
1261 | sk = NULL;
|
---|
1262 | /*
|
---|
1263 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end
|
---|
1264 | */
|
---|
1265 |
|
---|
1266 | pkey = X509_get0_pubkey(x);
|
---|
1267 |
|
---|
1268 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) {
|
---|
1269 | x = NULL;
|
---|
1270 | al = SSL3_AL_FATAL;
|
---|
1271 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1272 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
|
---|
1273 | goto f_err;
|
---|
1274 | }
|
---|
1275 |
|
---|
1276 | i = ssl_cert_type(x, pkey);
|
---|
1277 | if (i < 0) {
|
---|
1278 | x = NULL;
|
---|
1279 | al = SSL3_AL_FATAL;
|
---|
1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1281 | SSL_R_UNKNOWN_CERTIFICATE_TYPE);
|
---|
1282 | goto f_err;
|
---|
1283 | }
|
---|
1284 |
|
---|
1285 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher);
|
---|
1286 | if (exp_idx >= 0 && i != exp_idx
|
---|
1287 | && (exp_idx != SSL_PKEY_GOST_EC ||
|
---|
1288 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256
|
---|
1289 | && i != SSL_PKEY_GOST01))) {
|
---|
1290 | x = NULL;
|
---|
1291 | al = SSL_AD_ILLEGAL_PARAMETER;
|
---|
1292 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE,
|
---|
1293 | SSL_R_WRONG_CERTIFICATE_TYPE);
|
---|
1294 | goto f_err;
|
---|
1295 | }
|
---|
1296 | s->session->peer_type = i;
|
---|
1297 |
|
---|
1298 | X509_free(s->session->peer);
|
---|
1299 | X509_up_ref(x);
|
---|
1300 | s->session->peer = x;
|
---|
1301 | s->session->verify_result = s->verify_result;
|
---|
1302 |
|
---|
1303 | x = NULL;
|
---|
1304 | ret = MSG_PROCESS_CONTINUE_READING;
|
---|
1305 | goto done;
|
---|
1306 |
|
---|
1307 | f_err:
|
---|
1308 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
1309 | err:
|
---|
1310 | ossl_statem_set_error(s);
|
---|
1311 | done:
|
---|
1312 | X509_free(x);
|
---|
1313 | sk_X509_pop_free(sk, X509_free);
|
---|
1314 | return ret;
|
---|
1315 | }
|
---|
1316 |
|
---|
1317 | static int tls_process_ske_psk_preamble(SSL *s, PACKET *pkt, int *al)
|
---|
1318 | {
|
---|
1319 | #ifndef OPENSSL_NO_PSK
|
---|
1320 | PACKET psk_identity_hint;
|
---|
1321 |
|
---|
1322 | /* PSK ciphersuites are preceded by an identity hint */
|
---|
1323 |
|
---|
1324 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) {
|
---|
1325 | *al = SSL_AD_DECODE_ERROR;
|
---|
1326 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_LENGTH_MISMATCH);
|
---|
1327 | return 0;
|
---|
1328 | }
|
---|
1329 |
|
---|
1330 | /*
|
---|
1331 | * Store PSK identity hint for later use, hint is used in
|
---|
1332 | * tls_construct_client_key_exchange. Assume that the maximum length of
|
---|
1333 | * a PSK identity hint can be as long as the maximum length of a PSK
|
---|
1334 | * identity.
|
---|
1335 | */
|
---|
1336 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) {
|
---|
1337 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
1338 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, SSL_R_DATA_LENGTH_TOO_LONG);
|
---|
1339 | return 0;
|
---|
1340 | }
|
---|
1341 |
|
---|
1342 | if (PACKET_remaining(&psk_identity_hint) == 0) {
|
---|
1343 | OPENSSL_free(s->session->psk_identity_hint);
|
---|
1344 | s->session->psk_identity_hint = NULL;
|
---|
1345 | } else if (!PACKET_strndup(&psk_identity_hint,
|
---|
1346 | &s->session->psk_identity_hint)) {
|
---|
1347 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1348 | return 0;
|
---|
1349 | }
|
---|
1350 |
|
---|
1351 | return 1;
|
---|
1352 | #else
|
---|
1353 | SSLerr(SSL_F_TLS_PROCESS_SKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
1354 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1355 | return 0;
|
---|
1356 | #endif
|
---|
1357 | }
|
---|
1358 |
|
---|
1359 | static int tls_process_ske_srp(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
1360 | {
|
---|
1361 | #ifndef OPENSSL_NO_SRP
|
---|
1362 | PACKET prime, generator, salt, server_pub;
|
---|
1363 |
|
---|
1364 | if (!PACKET_get_length_prefixed_2(pkt, &prime)
|
---|
1365 | || !PACKET_get_length_prefixed_2(pkt, &generator)
|
---|
1366 | || !PACKET_get_length_prefixed_1(pkt, &salt)
|
---|
1367 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) {
|
---|
1368 | *al = SSL_AD_DECODE_ERROR;
|
---|
1369 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_LENGTH_MISMATCH);
|
---|
1370 | return 0;
|
---|
1371 | }
|
---|
1372 |
|
---|
1373 | if ((s->srp_ctx.N =
|
---|
1374 | BN_bin2bn(PACKET_data(&prime),
|
---|
1375 | PACKET_remaining(&prime), NULL)) == NULL
|
---|
1376 | || (s->srp_ctx.g =
|
---|
1377 | BN_bin2bn(PACKET_data(&generator),
|
---|
1378 | PACKET_remaining(&generator), NULL)) == NULL
|
---|
1379 | || (s->srp_ctx.s =
|
---|
1380 | BN_bin2bn(PACKET_data(&salt),
|
---|
1381 | PACKET_remaining(&salt), NULL)) == NULL
|
---|
1382 | || (s->srp_ctx.B =
|
---|
1383 | BN_bin2bn(PACKET_data(&server_pub),
|
---|
1384 | PACKET_remaining(&server_pub), NULL)) == NULL) {
|
---|
1385 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1386 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_BN_LIB);
|
---|
1387 | return 0;
|
---|
1388 | }
|
---|
1389 |
|
---|
1390 | if (!srp_verify_server_param(s, al)) {
|
---|
1391 | *al = SSL_AD_DECODE_ERROR;
|
---|
1392 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, SSL_R_BAD_SRP_PARAMETERS);
|
---|
1393 | return 0;
|
---|
1394 | }
|
---|
1395 |
|
---|
1396 | /* We must check if there is a certificate */
|
---|
1397 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
|
---|
1398 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
1399 |
|
---|
1400 | return 1;
|
---|
1401 | #else
|
---|
1402 | SSLerr(SSL_F_TLS_PROCESS_SKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
1403 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1404 | return 0;
|
---|
1405 | #endif
|
---|
1406 | }
|
---|
1407 |
|
---|
1408 | static int tls_process_ske_dhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
1409 | {
|
---|
1410 | #ifndef OPENSSL_NO_DH
|
---|
1411 | PACKET prime, generator, pub_key;
|
---|
1412 | EVP_PKEY *peer_tmp = NULL;
|
---|
1413 |
|
---|
1414 | DH *dh = NULL;
|
---|
1415 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL;
|
---|
1416 |
|
---|
1417 | int check_bits = 0;
|
---|
1418 |
|
---|
1419 | if (!PACKET_get_length_prefixed_2(pkt, &prime)
|
---|
1420 | || !PACKET_get_length_prefixed_2(pkt, &generator)
|
---|
1421 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) {
|
---|
1422 | *al = SSL_AD_DECODE_ERROR;
|
---|
1423 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_LENGTH_MISMATCH);
|
---|
1424 | return 0;
|
---|
1425 | }
|
---|
1426 |
|
---|
1427 | peer_tmp = EVP_PKEY_new();
|
---|
1428 | dh = DH_new();
|
---|
1429 |
|
---|
1430 | if (peer_tmp == NULL || dh == NULL) {
|
---|
1431 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1432 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_MALLOC_FAILURE);
|
---|
1433 | goto err;
|
---|
1434 | }
|
---|
1435 |
|
---|
1436 | p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL);
|
---|
1437 | g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), NULL);
|
---|
1438 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key),
|
---|
1439 | NULL);
|
---|
1440 | if (p == NULL || g == NULL || bnpub_key == NULL) {
|
---|
1441 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1442 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
1443 | goto err;
|
---|
1444 | }
|
---|
1445 |
|
---|
1446 | /* test non-zero pupkey */
|
---|
1447 | if (BN_is_zero(bnpub_key)) {
|
---|
1448 | *al = SSL_AD_DECODE_ERROR;
|
---|
1449 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
|
---|
1450 | goto err;
|
---|
1451 | }
|
---|
1452 |
|
---|
1453 | if (!DH_set0_pqg(dh, p, NULL, g)) {
|
---|
1454 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1455 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
1456 | goto err;
|
---|
1457 | }
|
---|
1458 | p = g = NULL;
|
---|
1459 |
|
---|
1460 | if (DH_check_params(dh, &check_bits) == 0 || check_bits != 0) {
|
---|
1461 | *al = SSL_AD_DECODE_ERROR;
|
---|
1462 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_BAD_DH_VALUE);
|
---|
1463 | goto err;
|
---|
1464 | }
|
---|
1465 |
|
---|
1466 | if (!DH_set0_key(dh, bnpub_key, NULL)) {
|
---|
1467 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1468 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_BN_LIB);
|
---|
1469 | goto err;
|
---|
1470 | }
|
---|
1471 | bnpub_key = NULL;
|
---|
1472 |
|
---|
1473 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) {
|
---|
1474 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
1475 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, SSL_R_DH_KEY_TOO_SMALL);
|
---|
1476 | goto err;
|
---|
1477 | }
|
---|
1478 |
|
---|
1479 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) {
|
---|
1480 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1481 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_EVP_LIB);
|
---|
1482 | goto err;
|
---|
1483 | }
|
---|
1484 |
|
---|
1485 | s->s3->peer_tmp = peer_tmp;
|
---|
1486 |
|
---|
1487 | /*
|
---|
1488 | * FIXME: This makes assumptions about which ciphersuites come with
|
---|
1489 | * public keys. We should have a less ad-hoc way of doing this
|
---|
1490 | */
|
---|
1491 | if (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aRSA | SSL_aDSS))
|
---|
1492 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
1493 | /* else anonymous DH, so no certificate or pkey. */
|
---|
1494 |
|
---|
1495 | return 1;
|
---|
1496 |
|
---|
1497 | err:
|
---|
1498 | BN_free(p);
|
---|
1499 | BN_free(g);
|
---|
1500 | BN_free(bnpub_key);
|
---|
1501 | DH_free(dh);
|
---|
1502 | EVP_PKEY_free(peer_tmp);
|
---|
1503 |
|
---|
1504 | return 0;
|
---|
1505 | #else
|
---|
1506 | SSLerr(SSL_F_TLS_PROCESS_SKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
1507 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1508 | return 0;
|
---|
1509 | #endif
|
---|
1510 | }
|
---|
1511 |
|
---|
1512 | static int tls_process_ske_ecdhe(SSL *s, PACKET *pkt, EVP_PKEY **pkey, int *al)
|
---|
1513 | {
|
---|
1514 | #ifndef OPENSSL_NO_EC
|
---|
1515 | PACKET encoded_pt;
|
---|
1516 | const unsigned char *ecparams;
|
---|
1517 | int curve_nid;
|
---|
1518 | unsigned int curve_flags;
|
---|
1519 | EVP_PKEY_CTX *pctx = NULL;
|
---|
1520 |
|
---|
1521 | /*
|
---|
1522 | * Extract elliptic curve parameters and the server's ephemeral ECDH
|
---|
1523 | * public key. For now we only support named (not generic) curves and
|
---|
1524 | * ECParameters in this case is just three bytes.
|
---|
1525 | */
|
---|
1526 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) {
|
---|
1527 | *al = SSL_AD_DECODE_ERROR;
|
---|
1528 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_TOO_SHORT);
|
---|
1529 | return 0;
|
---|
1530 | }
|
---|
1531 | /*
|
---|
1532 | * Check curve is one of our preferences, if not server has sent an
|
---|
1533 | * invalid curve. ECParameters is 3 bytes.
|
---|
1534 | */
|
---|
1535 | if (!tls1_check_curve(s, ecparams, 3)) {
|
---|
1536 | *al = SSL_AD_DECODE_ERROR;
|
---|
1537 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_WRONG_CURVE);
|
---|
1538 | return 0;
|
---|
1539 | }
|
---|
1540 |
|
---|
1541 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2), &curve_flags);
|
---|
1542 |
|
---|
1543 | if (curve_nid == 0) {
|
---|
1544 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1545 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE,
|
---|
1546 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
|
---|
1547 | return 0;
|
---|
1548 | }
|
---|
1549 |
|
---|
1550 | if ((curve_flags & TLS_CURVE_TYPE) == TLS_CURVE_CUSTOM) {
|
---|
1551 | EVP_PKEY *key = EVP_PKEY_new();
|
---|
1552 |
|
---|
1553 | if (key == NULL || !EVP_PKEY_set_type(key, curve_nid)) {
|
---|
1554 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1555 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
|
---|
1556 | EVP_PKEY_free(key);
|
---|
1557 | return 0;
|
---|
1558 | }
|
---|
1559 | s->s3->peer_tmp = key;
|
---|
1560 | } else {
|
---|
1561 | /* Set up EVP_PKEY with named curve as parameters */
|
---|
1562 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL);
|
---|
1563 | if (pctx == NULL
|
---|
1564 | || EVP_PKEY_paramgen_init(pctx) <= 0
|
---|
1565 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0
|
---|
1566 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) {
|
---|
1567 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1568 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_EVP_LIB);
|
---|
1569 | EVP_PKEY_CTX_free(pctx);
|
---|
1570 | return 0;
|
---|
1571 | }
|
---|
1572 | EVP_PKEY_CTX_free(pctx);
|
---|
1573 | pctx = NULL;
|
---|
1574 | }
|
---|
1575 |
|
---|
1576 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) {
|
---|
1577 | *al = SSL_AD_DECODE_ERROR;
|
---|
1578 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_LENGTH_MISMATCH);
|
---|
1579 | return 0;
|
---|
1580 | }
|
---|
1581 |
|
---|
1582 | if (!EVP_PKEY_set1_tls_encodedpoint(s->s3->peer_tmp,
|
---|
1583 | PACKET_data(&encoded_pt),
|
---|
1584 | PACKET_remaining(&encoded_pt))) {
|
---|
1585 | *al = SSL_AD_DECODE_ERROR;
|
---|
1586 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, SSL_R_BAD_ECPOINT);
|
---|
1587 | return 0;
|
---|
1588 | }
|
---|
1589 |
|
---|
1590 | /*
|
---|
1591 | * The ECC/TLS specification does not mention the use of DSA to sign
|
---|
1592 | * ECParameters in the server key exchange message. We do support RSA
|
---|
1593 | * and ECDSA.
|
---|
1594 | */
|
---|
1595 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aECDSA)
|
---|
1596 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
1597 | else if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aRSA)
|
---|
1598 | *pkey = X509_get0_pubkey(s->session->peer);
|
---|
1599 | /* else anonymous ECDH, so no certificate or pkey. */
|
---|
1600 |
|
---|
1601 | return 1;
|
---|
1602 | #else
|
---|
1603 | SSLerr(SSL_F_TLS_PROCESS_SKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
1604 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
1605 | return 0;
|
---|
1606 | #endif
|
---|
1607 | }
|
---|
1608 |
|
---|
1609 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt)
|
---|
1610 | {
|
---|
1611 | int al = -1;
|
---|
1612 | long alg_k;
|
---|
1613 | EVP_PKEY *pkey = NULL;
|
---|
1614 | PACKET save_param_start, signature;
|
---|
1615 |
|
---|
1616 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
1617 |
|
---|
1618 | save_param_start = *pkt;
|
---|
1619 |
|
---|
1620 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH)
|
---|
1621 | EVP_PKEY_free(s->s3->peer_tmp);
|
---|
1622 | s->s3->peer_tmp = NULL;
|
---|
1623 | #endif
|
---|
1624 |
|
---|
1625 | if (alg_k & SSL_PSK) {
|
---|
1626 | if (!tls_process_ske_psk_preamble(s, pkt, &al))
|
---|
1627 | goto err;
|
---|
1628 | }
|
---|
1629 |
|
---|
1630 | /* Nothing else to do for plain PSK or RSAPSK */
|
---|
1631 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) {
|
---|
1632 | } else if (alg_k & SSL_kSRP) {
|
---|
1633 | if (!tls_process_ske_srp(s, pkt, &pkey, &al))
|
---|
1634 | goto err;
|
---|
1635 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
|
---|
1636 | if (!tls_process_ske_dhe(s, pkt, &pkey, &al))
|
---|
1637 | goto err;
|
---|
1638 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
|
---|
1639 | if (!tls_process_ske_ecdhe(s, pkt, &pkey, &al))
|
---|
1640 | goto err;
|
---|
1641 | } else if (alg_k) {
|
---|
1642 | al = SSL_AD_UNEXPECTED_MESSAGE;
|
---|
1643 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE);
|
---|
1644 | goto err;
|
---|
1645 | }
|
---|
1646 |
|
---|
1647 | /* if it was signed, check the signature */
|
---|
1648 | if (pkey != NULL) {
|
---|
1649 | PACKET params;
|
---|
1650 | int maxsig;
|
---|
1651 | const EVP_MD *md = NULL;
|
---|
1652 | EVP_MD_CTX *md_ctx;
|
---|
1653 |
|
---|
1654 | /*
|
---|
1655 | * |pkt| now points to the beginning of the signature, so the difference
|
---|
1656 | * equals the length of the parameters.
|
---|
1657 | */
|
---|
1658 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms,
|
---|
1659 | PACKET_remaining(&save_param_start) -
|
---|
1660 | PACKET_remaining(pkt))) {
|
---|
1661 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1662 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
1663 | goto err;
|
---|
1664 | }
|
---|
1665 |
|
---|
1666 | if (SSL_USE_SIGALGS(s)) {
|
---|
1667 | const unsigned char *sigalgs;
|
---|
1668 | int rv;
|
---|
1669 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) {
|
---|
1670 | al = SSL_AD_DECODE_ERROR;
|
---|
1671 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT);
|
---|
1672 | goto err;
|
---|
1673 | }
|
---|
1674 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey);
|
---|
1675 | if (rv == -1) {
|
---|
1676 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1677 | goto err;
|
---|
1678 | } else if (rv == 0) {
|
---|
1679 | al = SSL_AD_DECODE_ERROR;
|
---|
1680 | goto err;
|
---|
1681 | }
|
---|
1682 | #ifdef SSL_DEBUG
|
---|
1683 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
|
---|
1684 | #endif
|
---|
1685 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) {
|
---|
1686 | md = EVP_md5_sha1();
|
---|
1687 | } else {
|
---|
1688 | md = EVP_sha1();
|
---|
1689 | }
|
---|
1690 |
|
---|
1691 | if (!PACKET_get_length_prefixed_2(pkt, &signature)
|
---|
1692 | || PACKET_remaining(pkt) != 0) {
|
---|
1693 | al = SSL_AD_DECODE_ERROR;
|
---|
1694 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH);
|
---|
1695 | goto err;
|
---|
1696 | }
|
---|
1697 | maxsig = EVP_PKEY_size(pkey);
|
---|
1698 | if (maxsig < 0) {
|
---|
1699 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1700 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
1701 | goto err;
|
---|
1702 | }
|
---|
1703 |
|
---|
1704 | /*
|
---|
1705 | * Check signature length
|
---|
1706 | */
|
---|
1707 | if (PACKET_remaining(&signature) > (size_t)maxsig) {
|
---|
1708 | /* wrong packet length */
|
---|
1709 | al = SSL_AD_DECODE_ERROR;
|
---|
1710 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE,
|
---|
1711 | SSL_R_WRONG_SIGNATURE_LENGTH);
|
---|
1712 | goto err;
|
---|
1713 | }
|
---|
1714 |
|
---|
1715 | md_ctx = EVP_MD_CTX_new();
|
---|
1716 | if (md_ctx == NULL) {
|
---|
1717 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1718 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
|
---|
1719 | goto err;
|
---|
1720 | }
|
---|
1721 |
|
---|
1722 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0
|
---|
1723 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]),
|
---|
1724 | SSL3_RANDOM_SIZE) <= 0
|
---|
1725 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]),
|
---|
1726 | SSL3_RANDOM_SIZE) <= 0
|
---|
1727 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms),
|
---|
1728 | PACKET_remaining(¶ms)) <= 0) {
|
---|
1729 | EVP_MD_CTX_free(md_ctx);
|
---|
1730 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1731 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB);
|
---|
1732 | goto err;
|
---|
1733 | }
|
---|
1734 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature),
|
---|
1735 | PACKET_remaining(&signature), pkey) <= 0) {
|
---|
1736 | /* bad signature */
|
---|
1737 | EVP_MD_CTX_free(md_ctx);
|
---|
1738 | al = SSL_AD_DECRYPT_ERROR;
|
---|
1739 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE);
|
---|
1740 | goto err;
|
---|
1741 | }
|
---|
1742 | EVP_MD_CTX_free(md_ctx);
|
---|
1743 | } else {
|
---|
1744 | /* aNULL, aSRP or PSK do not need public keys */
|
---|
1745 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP))
|
---|
1746 | && !(alg_k & SSL_PSK)) {
|
---|
1747 | /* Might be wrong key type, check it */
|
---|
1748 | if (ssl3_check_cert_and_algorithm(s)) {
|
---|
1749 | /* Otherwise this shouldn't happen */
|
---|
1750 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1751 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
1752 | } else {
|
---|
1753 | al = SSL_AD_DECODE_ERROR;
|
---|
1754 | }
|
---|
1755 | goto err;
|
---|
1756 | }
|
---|
1757 | /* still data left over */
|
---|
1758 | if (PACKET_remaining(pkt) != 0) {
|
---|
1759 | al = SSL_AD_DECODE_ERROR;
|
---|
1760 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE);
|
---|
1761 | goto err;
|
---|
1762 | }
|
---|
1763 | }
|
---|
1764 |
|
---|
1765 | return MSG_PROCESS_CONTINUE_READING;
|
---|
1766 | err:
|
---|
1767 | if (al != -1)
|
---|
1768 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
1769 | ossl_statem_set_error(s);
|
---|
1770 | return MSG_PROCESS_ERROR;
|
---|
1771 | }
|
---|
1772 |
|
---|
1773 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt)
|
---|
1774 | {
|
---|
1775 | int ret = MSG_PROCESS_ERROR;
|
---|
1776 | unsigned int list_len, ctype_num, i, name_len;
|
---|
1777 | X509_NAME *xn = NULL;
|
---|
1778 | const unsigned char *data;
|
---|
1779 | const unsigned char *namestart, *namebytes;
|
---|
1780 | STACK_OF(X509_NAME) *ca_sk = NULL;
|
---|
1781 |
|
---|
1782 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) {
|
---|
1783 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
1784 | goto err;
|
---|
1785 | }
|
---|
1786 |
|
---|
1787 | /* get the certificate types */
|
---|
1788 | if (!PACKET_get_1(pkt, &ctype_num)
|
---|
1789 | || !PACKET_get_bytes(pkt, &data, ctype_num)) {
|
---|
1790 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1791 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
|
---|
1792 | goto err;
|
---|
1793 | }
|
---|
1794 | OPENSSL_free(s->cert->ctypes);
|
---|
1795 | s->cert->ctypes = NULL;
|
---|
1796 | if (ctype_num > SSL3_CT_NUMBER) {
|
---|
1797 | /* If we exceed static buffer copy all to cert structure */
|
---|
1798 | s->cert->ctypes = OPENSSL_malloc(ctype_num);
|
---|
1799 | if (s->cert->ctypes == NULL) {
|
---|
1800 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
1801 | goto err;
|
---|
1802 | }
|
---|
1803 | memcpy(s->cert->ctypes, data, ctype_num);
|
---|
1804 | s->cert->ctype_num = (size_t)ctype_num;
|
---|
1805 | ctype_num = SSL3_CT_NUMBER;
|
---|
1806 | }
|
---|
1807 | for (i = 0; i < ctype_num; i++)
|
---|
1808 | s->s3->tmp.ctype[i] = data[i];
|
---|
1809 |
|
---|
1810 | if (SSL_USE_SIGALGS(s)) {
|
---|
1811 | if (!PACKET_get_net_2(pkt, &list_len)
|
---|
1812 | || !PACKET_get_bytes(pkt, &data, list_len)) {
|
---|
1813 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1814 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
1815 | SSL_R_LENGTH_MISMATCH);
|
---|
1816 | goto err;
|
---|
1817 | }
|
---|
1818 |
|
---|
1819 | /* Clear certificate digests and validity flags */
|
---|
1820 | for (i = 0; i < SSL_PKEY_NUM; i++) {
|
---|
1821 | s->s3->tmp.md[i] = NULL;
|
---|
1822 | s->s3->tmp.valid_flags[i] = 0;
|
---|
1823 | }
|
---|
1824 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) {
|
---|
1825 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1826 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
1827 | SSL_R_SIGNATURE_ALGORITHMS_ERROR);
|
---|
1828 | goto err;
|
---|
1829 | }
|
---|
1830 | if (!tls1_process_sigalgs(s)) {
|
---|
1831 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
1832 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
1833 | goto err;
|
---|
1834 | }
|
---|
1835 | } else {
|
---|
1836 | ssl_set_default_md(s);
|
---|
1837 | }
|
---|
1838 |
|
---|
1839 | /* get the CA RDNs */
|
---|
1840 | if (!PACKET_get_net_2(pkt, &list_len)
|
---|
1841 | || PACKET_remaining(pkt) != list_len) {
|
---|
1842 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1843 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH);
|
---|
1844 | goto err;
|
---|
1845 | }
|
---|
1846 |
|
---|
1847 | while (PACKET_remaining(pkt)) {
|
---|
1848 | if (!PACKET_get_net_2(pkt, &name_len)
|
---|
1849 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) {
|
---|
1850 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1851 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
1852 | SSL_R_LENGTH_MISMATCH);
|
---|
1853 | goto err;
|
---|
1854 | }
|
---|
1855 |
|
---|
1856 | namestart = namebytes;
|
---|
1857 |
|
---|
1858 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes,
|
---|
1859 | name_len)) == NULL) {
|
---|
1860 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1861 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB);
|
---|
1862 | goto err;
|
---|
1863 | }
|
---|
1864 |
|
---|
1865 | if (namebytes != (namestart + name_len)) {
|
---|
1866 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
1867 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST,
|
---|
1868 | SSL_R_CA_DN_LENGTH_MISMATCH);
|
---|
1869 | goto err;
|
---|
1870 | }
|
---|
1871 | if (!sk_X509_NAME_push(ca_sk, xn)) {
|
---|
1872 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE);
|
---|
1873 | goto err;
|
---|
1874 | }
|
---|
1875 | xn = NULL;
|
---|
1876 | }
|
---|
1877 |
|
---|
1878 | /* we should setup a certificate to return.... */
|
---|
1879 | s->s3->tmp.cert_req = 1;
|
---|
1880 | s->s3->tmp.ctype_num = ctype_num;
|
---|
1881 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free);
|
---|
1882 | s->s3->tmp.ca_names = ca_sk;
|
---|
1883 | ca_sk = NULL;
|
---|
1884 |
|
---|
1885 | ret = MSG_PROCESS_CONTINUE_PROCESSING;
|
---|
1886 | goto done;
|
---|
1887 | err:
|
---|
1888 | ossl_statem_set_error(s);
|
---|
1889 | done:
|
---|
1890 | X509_NAME_free(xn);
|
---|
1891 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free);
|
---|
1892 | return ret;
|
---|
1893 | }
|
---|
1894 |
|
---|
1895 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b)
|
---|
1896 | {
|
---|
1897 | return (X509_NAME_cmp(*a, *b));
|
---|
1898 | }
|
---|
1899 |
|
---|
1900 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt)
|
---|
1901 | {
|
---|
1902 | int al;
|
---|
1903 | unsigned int ticklen;
|
---|
1904 | unsigned long ticket_lifetime_hint;
|
---|
1905 |
|
---|
1906 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint)
|
---|
1907 | || !PACKET_get_net_2(pkt, &ticklen)
|
---|
1908 | || PACKET_remaining(pkt) != ticklen) {
|
---|
1909 | al = SSL_AD_DECODE_ERROR;
|
---|
1910 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
|
---|
1911 | goto f_err;
|
---|
1912 | }
|
---|
1913 |
|
---|
1914 | /* Server is allowed to change its mind and send an empty ticket. */
|
---|
1915 | if (ticklen == 0)
|
---|
1916 | return MSG_PROCESS_CONTINUE_READING;
|
---|
1917 |
|
---|
1918 | if (s->session->session_id_length > 0) {
|
---|
1919 | int i = s->session_ctx->session_cache_mode;
|
---|
1920 | SSL_SESSION *new_sess;
|
---|
1921 | /*
|
---|
1922 | * We reused an existing session, so we need to replace it with a new
|
---|
1923 | * one
|
---|
1924 | */
|
---|
1925 | if (i & SSL_SESS_CACHE_CLIENT) {
|
---|
1926 | /*
|
---|
1927 | * Remove the old session from the cache. We carry on if this fails
|
---|
1928 | */
|
---|
1929 | SSL_CTX_remove_session(s->session_ctx, s->session);
|
---|
1930 | }
|
---|
1931 |
|
---|
1932 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) {
|
---|
1933 | al = SSL_AD_INTERNAL_ERROR;
|
---|
1934 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
|
---|
1935 | goto f_err;
|
---|
1936 | }
|
---|
1937 |
|
---|
1938 | SSL_SESSION_free(s->session);
|
---|
1939 | s->session = new_sess;
|
---|
1940 | }
|
---|
1941 |
|
---|
1942 | OPENSSL_free(s->session->tlsext_tick);
|
---|
1943 | s->session->tlsext_ticklen = 0;
|
---|
1944 |
|
---|
1945 | s->session->tlsext_tick = OPENSSL_malloc(ticklen);
|
---|
1946 | if (s->session->tlsext_tick == NULL) {
|
---|
1947 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE);
|
---|
1948 | goto err;
|
---|
1949 | }
|
---|
1950 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) {
|
---|
1951 | al = SSL_AD_DECODE_ERROR;
|
---|
1952 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH);
|
---|
1953 | goto f_err;
|
---|
1954 | }
|
---|
1955 |
|
---|
1956 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint;
|
---|
1957 | s->session->tlsext_ticklen = ticklen;
|
---|
1958 | /*
|
---|
1959 | * There are two ways to detect a resumed ticket session. One is to set
|
---|
1960 | * an appropriate session ID and then the server must return a match in
|
---|
1961 | * ServerHello. This allows the normal client session ID matching to work
|
---|
1962 | * and we know much earlier that the ticket has been accepted. The
|
---|
1963 | * other way is to set zero length session ID when the ticket is
|
---|
1964 | * presented and rely on the handshake to determine session resumption.
|
---|
1965 | * We choose the former approach because this fits in with assumptions
|
---|
1966 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is
|
---|
1967 | * SHA256 is disabled) hash of the ticket.
|
---|
1968 | */
|
---|
1969 | if (!EVP_Digest(s->session->tlsext_tick, ticklen,
|
---|
1970 | s->session->session_id, &s->session->session_id_length,
|
---|
1971 | EVP_sha256(), NULL)) {
|
---|
1972 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_EVP_LIB);
|
---|
1973 | goto err;
|
---|
1974 | }
|
---|
1975 | return MSG_PROCESS_CONTINUE_READING;
|
---|
1976 | f_err:
|
---|
1977 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
1978 | err:
|
---|
1979 | ossl_statem_set_error(s);
|
---|
1980 | return MSG_PROCESS_ERROR;
|
---|
1981 | }
|
---|
1982 |
|
---|
1983 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt)
|
---|
1984 | {
|
---|
1985 | int al;
|
---|
1986 | unsigned long resplen;
|
---|
1987 | unsigned int type;
|
---|
1988 |
|
---|
1989 | if (!PACKET_get_1(pkt, &type)
|
---|
1990 | || type != TLSEXT_STATUSTYPE_ocsp) {
|
---|
1991 | al = SSL_AD_DECODE_ERROR;
|
---|
1992 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE);
|
---|
1993 | goto f_err;
|
---|
1994 | }
|
---|
1995 | if (!PACKET_get_net_3(pkt, &resplen)
|
---|
1996 | || PACKET_remaining(pkt) != resplen) {
|
---|
1997 | al = SSL_AD_DECODE_ERROR;
|
---|
1998 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
|
---|
1999 | goto f_err;
|
---|
2000 | }
|
---|
2001 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen);
|
---|
2002 | if (s->tlsext_ocsp_resp == NULL) {
|
---|
2003 | al = SSL_AD_INTERNAL_ERROR;
|
---|
2004 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE);
|
---|
2005 | goto f_err;
|
---|
2006 | }
|
---|
2007 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) {
|
---|
2008 | al = SSL_AD_DECODE_ERROR;
|
---|
2009 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH);
|
---|
2010 | goto f_err;
|
---|
2011 | }
|
---|
2012 | s->tlsext_ocsp_resplen = resplen;
|
---|
2013 | return MSG_PROCESS_CONTINUE_READING;
|
---|
2014 | f_err:
|
---|
2015 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
2016 | ossl_statem_set_error(s);
|
---|
2017 | return MSG_PROCESS_ERROR;
|
---|
2018 | }
|
---|
2019 |
|
---|
2020 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt)
|
---|
2021 | {
|
---|
2022 | if (PACKET_remaining(pkt) > 0) {
|
---|
2023 | /* should contain no data */
|
---|
2024 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR);
|
---|
2025 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH);
|
---|
2026 | ossl_statem_set_error(s);
|
---|
2027 | return MSG_PROCESS_ERROR;
|
---|
2028 | }
|
---|
2029 | #ifndef OPENSSL_NO_SRP
|
---|
2030 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
|
---|
2031 | if (SRP_Calc_A_param(s) <= 0) {
|
---|
2032 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC);
|
---|
2033 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2034 | ossl_statem_set_error(s);
|
---|
2035 | return MSG_PROCESS_ERROR;
|
---|
2036 | }
|
---|
2037 | }
|
---|
2038 | #endif
|
---|
2039 |
|
---|
2040 | /*
|
---|
2041 | * at this point we check that we have the required stuff from
|
---|
2042 | * the server
|
---|
2043 | */
|
---|
2044 | if (!ssl3_check_cert_and_algorithm(s)) {
|
---|
2045 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
2046 | ossl_statem_set_error(s);
|
---|
2047 | return MSG_PROCESS_ERROR;
|
---|
2048 | }
|
---|
2049 |
|
---|
2050 | /*
|
---|
2051 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and
|
---|
2052 | * |tlsext_ocsp_resplen| values will be set if we actually received a status
|
---|
2053 | * message, or NULL and -1 otherwise
|
---|
2054 | */
|
---|
2055 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) {
|
---|
2056 | int ret;
|
---|
2057 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
|
---|
2058 | if (ret == 0) {
|
---|
2059 | ssl3_send_alert(s, SSL3_AL_FATAL,
|
---|
2060 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE);
|
---|
2061 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE,
|
---|
2062 | SSL_R_INVALID_STATUS_RESPONSE);
|
---|
2063 | return MSG_PROCESS_ERROR;
|
---|
2064 | }
|
---|
2065 | if (ret < 0) {
|
---|
2066 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2067 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE);
|
---|
2068 | return MSG_PROCESS_ERROR;
|
---|
2069 | }
|
---|
2070 | }
|
---|
2071 | #ifndef OPENSSL_NO_CT
|
---|
2072 | if (s->ct_validation_callback != NULL) {
|
---|
2073 | /* Note we validate the SCTs whether or not we abort on error */
|
---|
2074 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) {
|
---|
2075 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
2076 | return MSG_PROCESS_ERROR;
|
---|
2077 | }
|
---|
2078 | }
|
---|
2079 | #endif
|
---|
2080 |
|
---|
2081 | #ifndef OPENSSL_NO_SCTP
|
---|
2082 | /* Only applies to renegotiation */
|
---|
2083 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s))
|
---|
2084 | && s->renegotiate != 0)
|
---|
2085 | return MSG_PROCESS_CONTINUE_PROCESSING;
|
---|
2086 | else
|
---|
2087 | #endif
|
---|
2088 | return MSG_PROCESS_FINISHED_READING;
|
---|
2089 | }
|
---|
2090 |
|
---|
2091 | static int tls_construct_cke_psk_preamble(SSL *s, unsigned char **p,
|
---|
2092 | size_t *pskhdrlen, int *al)
|
---|
2093 | {
|
---|
2094 | #ifndef OPENSSL_NO_PSK
|
---|
2095 | int ret = 0;
|
---|
2096 | /*
|
---|
2097 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a
|
---|
2098 | * \0-terminated identity. The last byte is for us for simulating
|
---|
2099 | * strnlen.
|
---|
2100 | */
|
---|
2101 | char identity[PSK_MAX_IDENTITY_LEN + 1];
|
---|
2102 | size_t identitylen = 0;
|
---|
2103 | unsigned char psk[PSK_MAX_PSK_LEN];
|
---|
2104 | unsigned char *tmppsk = NULL;
|
---|
2105 | char *tmpidentity = NULL;
|
---|
2106 | size_t psklen = 0;
|
---|
2107 |
|
---|
2108 | if (s->psk_client_callback == NULL) {
|
---|
2109 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, SSL_R_PSK_NO_CLIENT_CB);
|
---|
2110 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2111 | goto err;
|
---|
2112 | }
|
---|
2113 |
|
---|
2114 | memset(identity, 0, sizeof(identity));
|
---|
2115 |
|
---|
2116 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint,
|
---|
2117 | identity, sizeof(identity) - 1,
|
---|
2118 | psk, sizeof(psk));
|
---|
2119 |
|
---|
2120 | if (psklen > PSK_MAX_PSK_LEN) {
|
---|
2121 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
2122 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
2123 | goto err;
|
---|
2124 | } else if (psklen == 0) {
|
---|
2125 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE,
|
---|
2126 | SSL_R_PSK_IDENTITY_NOT_FOUND);
|
---|
2127 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
2128 | goto err;
|
---|
2129 | }
|
---|
2130 |
|
---|
2131 | identitylen = strlen(identity);
|
---|
2132 | if (identitylen > PSK_MAX_IDENTITY_LEN) {
|
---|
2133 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
2134 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
2135 | goto err;
|
---|
2136 | }
|
---|
2137 |
|
---|
2138 | tmppsk = OPENSSL_memdup(psk, psklen);
|
---|
2139 | tmpidentity = OPENSSL_strdup(identity);
|
---|
2140 | if (tmppsk == NULL || tmpidentity == NULL) {
|
---|
2141 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_MALLOC_FAILURE);
|
---|
2142 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2143 | goto err;
|
---|
2144 | }
|
---|
2145 |
|
---|
2146 | OPENSSL_free(s->s3->tmp.psk);
|
---|
2147 | s->s3->tmp.psk = tmppsk;
|
---|
2148 | s->s3->tmp.psklen = psklen;
|
---|
2149 | tmppsk = NULL;
|
---|
2150 | OPENSSL_free(s->session->psk_identity);
|
---|
2151 | s->session->psk_identity = tmpidentity;
|
---|
2152 | tmpidentity = NULL;
|
---|
2153 | s2n(identitylen, *p);
|
---|
2154 | memcpy(*p, identity, identitylen);
|
---|
2155 | *pskhdrlen = 2 + identitylen;
|
---|
2156 | *p += identitylen;
|
---|
2157 |
|
---|
2158 | ret = 1;
|
---|
2159 |
|
---|
2160 | err:
|
---|
2161 | OPENSSL_cleanse(psk, psklen);
|
---|
2162 | OPENSSL_cleanse(identity, sizeof(identity));
|
---|
2163 | OPENSSL_clear_free(tmppsk, psklen);
|
---|
2164 | OPENSSL_clear_free(tmpidentity, identitylen);
|
---|
2165 |
|
---|
2166 | return ret;
|
---|
2167 | #else
|
---|
2168 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_PSK_PREAMBLE, ERR_R_INTERNAL_ERROR);
|
---|
2169 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2170 | return 0;
|
---|
2171 | #endif
|
---|
2172 | }
|
---|
2173 |
|
---|
2174 | static int tls_construct_cke_rsa(SSL *s, unsigned char **p, int *len, int *al)
|
---|
2175 | {
|
---|
2176 | #ifndef OPENSSL_NO_RSA
|
---|
2177 | unsigned char *q;
|
---|
2178 | EVP_PKEY *pkey = NULL;
|
---|
2179 | EVP_PKEY_CTX *pctx = NULL;
|
---|
2180 | size_t enclen;
|
---|
2181 | unsigned char *pms = NULL;
|
---|
2182 | size_t pmslen = 0;
|
---|
2183 |
|
---|
2184 | if (s->session->peer == NULL) {
|
---|
2185 | /*
|
---|
2186 | * We should always have a server certificate with SSL_kRSA.
|
---|
2187 | */
|
---|
2188 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
2189 | return 0;
|
---|
2190 | }
|
---|
2191 |
|
---|
2192 | pkey = X509_get0_pubkey(s->session->peer);
|
---|
2193 | if (EVP_PKEY_get0_RSA(pkey) == NULL) {
|
---|
2194 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
2195 | return 0;
|
---|
2196 | }
|
---|
2197 |
|
---|
2198 | pmslen = SSL_MAX_MASTER_KEY_LENGTH;
|
---|
2199 | pms = OPENSSL_malloc(pmslen);
|
---|
2200 | if (pms == NULL) {
|
---|
2201 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_MALLOC_FAILURE);
|
---|
2202 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2203 | return 0;
|
---|
2204 | }
|
---|
2205 |
|
---|
2206 | pms[0] = s->client_version >> 8;
|
---|
2207 | pms[1] = s->client_version & 0xff;
|
---|
2208 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) {
|
---|
2209 | goto err;
|
---|
2210 | }
|
---|
2211 |
|
---|
2212 | q = *p;
|
---|
2213 | /* Fix buf for TLS and beyond */
|
---|
2214 | if (s->version > SSL3_VERSION)
|
---|
2215 | *p += 2;
|
---|
2216 | pctx = EVP_PKEY_CTX_new(pkey, NULL);
|
---|
2217 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0
|
---|
2218 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) {
|
---|
2219 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_EVP_LIB);
|
---|
2220 | goto err;
|
---|
2221 | }
|
---|
2222 | if (EVP_PKEY_encrypt(pctx, *p, &enclen, pms, pmslen) <= 0) {
|
---|
2223 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, SSL_R_BAD_RSA_ENCRYPT);
|
---|
2224 | goto err;
|
---|
2225 | }
|
---|
2226 | *len = enclen;
|
---|
2227 | EVP_PKEY_CTX_free(pctx);
|
---|
2228 | pctx = NULL;
|
---|
2229 | # ifdef PKCS1_CHECK
|
---|
2230 | if (s->options & SSL_OP_PKCS1_CHECK_1)
|
---|
2231 | (*p)[1]++;
|
---|
2232 | if (s->options & SSL_OP_PKCS1_CHECK_2)
|
---|
2233 | tmp_buf[0] = 0x70;
|
---|
2234 | # endif
|
---|
2235 |
|
---|
2236 | /* Fix buf for TLS and beyond */
|
---|
2237 | if (s->version > SSL3_VERSION) {
|
---|
2238 | s2n(*len, q);
|
---|
2239 | *len += 2;
|
---|
2240 | }
|
---|
2241 |
|
---|
2242 | s->s3->tmp.pms = pms;
|
---|
2243 | s->s3->tmp.pmslen = pmslen;
|
---|
2244 |
|
---|
2245 | return 1;
|
---|
2246 | err:
|
---|
2247 | OPENSSL_clear_free(pms, pmslen);
|
---|
2248 | EVP_PKEY_CTX_free(pctx);
|
---|
2249 |
|
---|
2250 | return 0;
|
---|
2251 | #else
|
---|
2252 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_RSA, ERR_R_INTERNAL_ERROR);
|
---|
2253 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2254 | return 0;
|
---|
2255 | #endif
|
---|
2256 | }
|
---|
2257 |
|
---|
2258 | static int tls_construct_cke_dhe(SSL *s, unsigned char **p, int *len, int *al)
|
---|
2259 | {
|
---|
2260 | #ifndef OPENSSL_NO_DH
|
---|
2261 | DH *dh_clnt = NULL;
|
---|
2262 | const BIGNUM *pub_key;
|
---|
2263 | EVP_PKEY *ckey = NULL, *skey = NULL;
|
---|
2264 |
|
---|
2265 | skey = s->s3->peer_tmp;
|
---|
2266 | if (skey == NULL) {
|
---|
2267 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
2268 | return 0;
|
---|
2269 | }
|
---|
2270 | ckey = ssl_generate_pkey(skey);
|
---|
2271 | if (ckey == NULL) {
|
---|
2272 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
2273 | return 0;
|
---|
2274 | }
|
---|
2275 |
|
---|
2276 | dh_clnt = EVP_PKEY_get0_DH(ckey);
|
---|
2277 |
|
---|
2278 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) {
|
---|
2279 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
2280 | EVP_PKEY_free(ckey);
|
---|
2281 | return 0;
|
---|
2282 | }
|
---|
2283 |
|
---|
2284 | /* send off the data */
|
---|
2285 | DH_get0_key(dh_clnt, &pub_key, NULL);
|
---|
2286 | *len = BN_num_bytes(pub_key);
|
---|
2287 | s2n(*len, *p);
|
---|
2288 | BN_bn2bin(pub_key, *p);
|
---|
2289 | *len += 2;
|
---|
2290 | EVP_PKEY_free(ckey);
|
---|
2291 |
|
---|
2292 | return 1;
|
---|
2293 | #else
|
---|
2294 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_DHE, ERR_R_INTERNAL_ERROR);
|
---|
2295 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2296 | return 0;
|
---|
2297 | #endif
|
---|
2298 | }
|
---|
2299 |
|
---|
2300 | static int tls_construct_cke_ecdhe(SSL *s, unsigned char **p, int *len, int *al)
|
---|
2301 | {
|
---|
2302 | #ifndef OPENSSL_NO_EC
|
---|
2303 | unsigned char *encodedPoint = NULL;
|
---|
2304 | int encoded_pt_len = 0;
|
---|
2305 | EVP_PKEY *ckey = NULL, *skey = NULL;
|
---|
2306 |
|
---|
2307 | skey = s->s3->peer_tmp;
|
---|
2308 | if (skey == NULL) {
|
---|
2309 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
2310 | return 0;
|
---|
2311 | }
|
---|
2312 |
|
---|
2313 | ckey = ssl_generate_pkey(skey);
|
---|
2314 | if (ckey == NULL) {
|
---|
2315 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
2316 | goto err;
|
---|
2317 | }
|
---|
2318 |
|
---|
2319 | if (ssl_derive(s, ckey, skey) == 0) {
|
---|
2320 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EVP_LIB);
|
---|
2321 | goto err;
|
---|
2322 | }
|
---|
2323 |
|
---|
2324 | /* Generate encoding of client key */
|
---|
2325 | encoded_pt_len = EVP_PKEY_get1_tls_encodedpoint(ckey, &encodedPoint);
|
---|
2326 |
|
---|
2327 | if (encoded_pt_len == 0) {
|
---|
2328 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_EC_LIB);
|
---|
2329 | goto err;
|
---|
2330 | }
|
---|
2331 |
|
---|
2332 | EVP_PKEY_free(ckey);
|
---|
2333 | ckey = NULL;
|
---|
2334 |
|
---|
2335 | *len = encoded_pt_len;
|
---|
2336 |
|
---|
2337 | /* length of encoded point */
|
---|
2338 | **p = *len;
|
---|
2339 | *p += 1;
|
---|
2340 | /* copy the point */
|
---|
2341 | memcpy(*p, encodedPoint, *len);
|
---|
2342 | /* increment len to account for length field */
|
---|
2343 | *len += 1;
|
---|
2344 |
|
---|
2345 | OPENSSL_free(encodedPoint);
|
---|
2346 |
|
---|
2347 | return 1;
|
---|
2348 | err:
|
---|
2349 | EVP_PKEY_free(ckey);
|
---|
2350 | return 0;
|
---|
2351 | #else
|
---|
2352 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_ECDHE, ERR_R_INTERNAL_ERROR);
|
---|
2353 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2354 | return 0;
|
---|
2355 | #endif
|
---|
2356 | }
|
---|
2357 |
|
---|
2358 | static int tls_construct_cke_gost(SSL *s, unsigned char **p, int *len, int *al)
|
---|
2359 | {
|
---|
2360 | #ifndef OPENSSL_NO_GOST
|
---|
2361 | /* GOST key exchange message creation */
|
---|
2362 | EVP_PKEY_CTX *pkey_ctx = NULL;
|
---|
2363 | X509 *peer_cert;
|
---|
2364 | size_t msglen;
|
---|
2365 | unsigned int md_len;
|
---|
2366 | unsigned char shared_ukm[32], tmp[256];
|
---|
2367 | EVP_MD_CTX *ukm_hash = NULL;
|
---|
2368 | int dgst_nid = NID_id_GostR3411_94;
|
---|
2369 | unsigned char *pms = NULL;
|
---|
2370 | size_t pmslen = 0;
|
---|
2371 |
|
---|
2372 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0)
|
---|
2373 | dgst_nid = NID_id_GostR3411_2012_256;
|
---|
2374 |
|
---|
2375 | /*
|
---|
2376 | * Get server sertificate PKEY and create ctx from it
|
---|
2377 | */
|
---|
2378 | peer_cert = s->session->peer;
|
---|
2379 | if (!peer_cert) {
|
---|
2380 | *al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
2381 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST,
|
---|
2382 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
|
---|
2383 | return 0;
|
---|
2384 | }
|
---|
2385 |
|
---|
2386 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL);
|
---|
2387 | if (pkey_ctx == NULL) {
|
---|
2388 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2389 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
|
---|
2390 | return 0;
|
---|
2391 | }
|
---|
2392 | /*
|
---|
2393 | * If we have send a certificate, and certificate key
|
---|
2394 | * parameters match those of server certificate, use
|
---|
2395 | * certificate key for key exchange
|
---|
2396 | */
|
---|
2397 |
|
---|
2398 | /* Otherwise, generate ephemeral key pair */
|
---|
2399 | pmslen = 32;
|
---|
2400 | pms = OPENSSL_malloc(pmslen);
|
---|
2401 | if (pms == NULL) {
|
---|
2402 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2403 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_MALLOC_FAILURE);
|
---|
2404 | goto err;
|
---|
2405 | }
|
---|
2406 |
|
---|
2407 | if (EVP_PKEY_encrypt_init(pkey_ctx) <= 0
|
---|
2408 | /* Generate session key */
|
---|
2409 | || RAND_bytes(pms, pmslen) <= 0) {
|
---|
2410 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2411 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
2412 | goto err;
|
---|
2413 | };
|
---|
2414 | /*
|
---|
2415 | * Compute shared IV and store it in algorithm-specific context
|
---|
2416 | * data
|
---|
2417 | */
|
---|
2418 | ukm_hash = EVP_MD_CTX_new();
|
---|
2419 | if (ukm_hash == NULL
|
---|
2420 | || EVP_DigestInit(ukm_hash, EVP_get_digestbynid(dgst_nid)) <= 0
|
---|
2421 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random,
|
---|
2422 | SSL3_RANDOM_SIZE) <= 0
|
---|
2423 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random,
|
---|
2424 | SSL3_RANDOM_SIZE) <= 0
|
---|
2425 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) {
|
---|
2426 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2427 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
2428 | goto err;
|
---|
2429 | }
|
---|
2430 | EVP_MD_CTX_free(ukm_hash);
|
---|
2431 | ukm_hash = NULL;
|
---|
2432 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT,
|
---|
2433 | EVP_PKEY_CTRL_SET_IV, 8, shared_ukm) < 0) {
|
---|
2434 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2435 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
|
---|
2436 | goto err;
|
---|
2437 | }
|
---|
2438 | /* Make GOST keytransport blob message */
|
---|
2439 | /*
|
---|
2440 | * Encapsulate it into sequence
|
---|
2441 | */
|
---|
2442 | *((*p)++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
|
---|
2443 | msglen = 255;
|
---|
2444 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) {
|
---|
2445 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2446 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, SSL_R_LIBRARY_BUG);
|
---|
2447 | goto err;
|
---|
2448 | }
|
---|
2449 | if (msglen >= 0x80) {
|
---|
2450 | *((*p)++) = 0x81;
|
---|
2451 | *((*p)++) = msglen & 0xff;
|
---|
2452 | *len = msglen + 3;
|
---|
2453 | } else {
|
---|
2454 | *((*p)++) = msglen & 0xff;
|
---|
2455 | *len = msglen + 2;
|
---|
2456 | }
|
---|
2457 | memcpy(*p, tmp, msglen);
|
---|
2458 |
|
---|
2459 | EVP_PKEY_CTX_free(pkey_ctx);
|
---|
2460 | s->s3->tmp.pms = pms;
|
---|
2461 | s->s3->tmp.pmslen = pmslen;
|
---|
2462 |
|
---|
2463 | return 1;
|
---|
2464 | err:
|
---|
2465 | EVP_PKEY_CTX_free(pkey_ctx);
|
---|
2466 | OPENSSL_clear_free(pms, pmslen);
|
---|
2467 | EVP_MD_CTX_free(ukm_hash);
|
---|
2468 | return 0;
|
---|
2469 | #else
|
---|
2470 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_GOST, ERR_R_INTERNAL_ERROR);
|
---|
2471 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2472 | return 0;
|
---|
2473 | #endif
|
---|
2474 | }
|
---|
2475 |
|
---|
2476 | static int tls_construct_cke_srp(SSL *s, unsigned char **p, int *len, int *al)
|
---|
2477 | {
|
---|
2478 | #ifndef OPENSSL_NO_SRP
|
---|
2479 | if (s->srp_ctx.A != NULL) {
|
---|
2480 | /* send off the data */
|
---|
2481 | *len = BN_num_bytes(s->srp_ctx.A);
|
---|
2482 | s2n(*len, *p);
|
---|
2483 | BN_bn2bin(s->srp_ctx.A, *p);
|
---|
2484 | *len += 2;
|
---|
2485 | } else {
|
---|
2486 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
2487 | return 0;
|
---|
2488 | }
|
---|
2489 | OPENSSL_free(s->session->srp_username);
|
---|
2490 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login);
|
---|
2491 | if (s->session->srp_username == NULL) {
|
---|
2492 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_MALLOC_FAILURE);
|
---|
2493 | return 0;
|
---|
2494 | }
|
---|
2495 |
|
---|
2496 | return 1;
|
---|
2497 | #else
|
---|
2498 | SSLerr(SSL_F_TLS_CONSTRUCT_CKE_SRP, ERR_R_INTERNAL_ERROR);
|
---|
2499 | *al = SSL_AD_INTERNAL_ERROR;
|
---|
2500 | return 0;
|
---|
2501 | #endif
|
---|
2502 | }
|
---|
2503 |
|
---|
2504 | int tls_construct_client_key_exchange(SSL *s)
|
---|
2505 | {
|
---|
2506 | unsigned char *p;
|
---|
2507 | int len;
|
---|
2508 | size_t pskhdrlen = 0;
|
---|
2509 | unsigned long alg_k;
|
---|
2510 | int al = -1;
|
---|
2511 |
|
---|
2512 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
2513 |
|
---|
2514 | p = ssl_handshake_start(s);
|
---|
2515 |
|
---|
2516 | if ((alg_k & SSL_PSK)
|
---|
2517 | && !tls_construct_cke_psk_preamble(s, &p, &pskhdrlen, &al))
|
---|
2518 | goto err;
|
---|
2519 |
|
---|
2520 | if (alg_k & SSL_kPSK) {
|
---|
2521 | len = 0;
|
---|
2522 | } else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) {
|
---|
2523 | if (!tls_construct_cke_rsa(s, &p, &len, &al))
|
---|
2524 | goto err;
|
---|
2525 | } else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) {
|
---|
2526 | if (!tls_construct_cke_dhe(s, &p, &len, &al))
|
---|
2527 | goto err;
|
---|
2528 | } else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) {
|
---|
2529 | if (!tls_construct_cke_ecdhe(s, &p, &len, &al))
|
---|
2530 | goto err;
|
---|
2531 | } else if (alg_k & SSL_kGOST) {
|
---|
2532 | if (!tls_construct_cke_gost(s, &p, &len, &al))
|
---|
2533 | goto err;
|
---|
2534 | } else if (alg_k & SSL_kSRP) {
|
---|
2535 | if (!tls_construct_cke_srp(s, &p, &len, &al))
|
---|
2536 | goto err;
|
---|
2537 | } else {
|
---|
2538 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
2539 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
2540 | goto err;
|
---|
2541 | }
|
---|
2542 |
|
---|
2543 | len += pskhdrlen;
|
---|
2544 |
|
---|
2545 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, len)) {
|
---|
2546 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
|
---|
2547 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
|
---|
2548 | goto err;
|
---|
2549 | }
|
---|
2550 |
|
---|
2551 | return 1;
|
---|
2552 | err:
|
---|
2553 | if (al != -1)
|
---|
2554 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
2555 | OPENSSL_clear_free(s->s3->tmp.pms, s->s3->tmp.pmslen);
|
---|
2556 | s->s3->tmp.pms = NULL;
|
---|
2557 | #ifndef OPENSSL_NO_PSK
|
---|
2558 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen);
|
---|
2559 | s->s3->tmp.psk = NULL;
|
---|
2560 | #endif
|
---|
2561 | ossl_statem_set_error(s);
|
---|
2562 | return 0;
|
---|
2563 | }
|
---|
2564 |
|
---|
2565 | int tls_client_key_exchange_post_work(SSL *s)
|
---|
2566 | {
|
---|
2567 | unsigned char *pms = NULL;
|
---|
2568 | size_t pmslen = 0;
|
---|
2569 |
|
---|
2570 | pms = s->s3->tmp.pms;
|
---|
2571 | pmslen = s->s3->tmp.pmslen;
|
---|
2572 |
|
---|
2573 | #ifndef OPENSSL_NO_SRP
|
---|
2574 | /* Check for SRP */
|
---|
2575 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) {
|
---|
2576 | if (!srp_generate_client_master_secret(s)) {
|
---|
2577 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK,
|
---|
2578 | ERR_R_INTERNAL_ERROR);
|
---|
2579 | goto err;
|
---|
2580 | }
|
---|
2581 | return 1;
|
---|
2582 | }
|
---|
2583 | #endif
|
---|
2584 |
|
---|
2585 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) {
|
---|
2586 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2587 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE);
|
---|
2588 | goto err;
|
---|
2589 | }
|
---|
2590 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) {
|
---|
2591 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2592 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR);
|
---|
2593 | /* ssl_generate_master_secret frees the pms even on error */
|
---|
2594 | pms = NULL;
|
---|
2595 | pmslen = 0;
|
---|
2596 | goto err;
|
---|
2597 | }
|
---|
2598 | pms = NULL;
|
---|
2599 | pmslen = 0;
|
---|
2600 |
|
---|
2601 | #ifndef OPENSSL_NO_SCTP
|
---|
2602 | if (SSL_IS_DTLS(s)) {
|
---|
2603 | unsigned char sctpauthkey[64];
|
---|
2604 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)];
|
---|
2605 |
|
---|
2606 | /*
|
---|
2607 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP
|
---|
2608 | * used.
|
---|
2609 | */
|
---|
2610 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL,
|
---|
2611 | sizeof(DTLS1_SCTP_AUTH_LABEL));
|
---|
2612 |
|
---|
2613 | if (SSL_export_keying_material(s, sctpauthkey,
|
---|
2614 | sizeof(sctpauthkey), labelbuffer,
|
---|
2615 | sizeof(labelbuffer), NULL, 0, 0) <= 0)
|
---|
2616 | goto err;
|
---|
2617 |
|
---|
2618 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY,
|
---|
2619 | sizeof(sctpauthkey), sctpauthkey);
|
---|
2620 | }
|
---|
2621 | #endif
|
---|
2622 |
|
---|
2623 | return 1;
|
---|
2624 | err:
|
---|
2625 | OPENSSL_clear_free(pms, pmslen);
|
---|
2626 | s->s3->tmp.pms = NULL;
|
---|
2627 | return 0;
|
---|
2628 | }
|
---|
2629 |
|
---|
2630 | int tls_construct_client_verify(SSL *s)
|
---|
2631 | {
|
---|
2632 | unsigned char *p;
|
---|
2633 | EVP_PKEY *pkey;
|
---|
2634 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys];
|
---|
2635 | EVP_MD_CTX *mctx;
|
---|
2636 | unsigned u = 0;
|
---|
2637 | unsigned long n = 0;
|
---|
2638 | long hdatalen = 0;
|
---|
2639 | void *hdata;
|
---|
2640 |
|
---|
2641 | mctx = EVP_MD_CTX_new();
|
---|
2642 | if (mctx == NULL) {
|
---|
2643 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE);
|
---|
2644 | goto err;
|
---|
2645 | }
|
---|
2646 |
|
---|
2647 | p = ssl_handshake_start(s);
|
---|
2648 | pkey = s->cert->key->privatekey;
|
---|
2649 |
|
---|
2650 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
|
---|
2651 | if (hdatalen <= 0) {
|
---|
2652 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
2653 | goto err;
|
---|
2654 | }
|
---|
2655 | if (SSL_USE_SIGALGS(s)) {
|
---|
2656 | if (!tls12_get_sigandhash(p, pkey, md)) {
|
---|
2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
2658 | goto err;
|
---|
2659 | }
|
---|
2660 | p += 2;
|
---|
2661 | n = 2;
|
---|
2662 | }
|
---|
2663 | #ifdef SSL_DEBUG
|
---|
2664 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md));
|
---|
2665 | #endif
|
---|
2666 | if (!EVP_SignInit_ex(mctx, md, NULL)
|
---|
2667 | || !EVP_SignUpdate(mctx, hdata, hdatalen)
|
---|
2668 | || (s->version == SSL3_VERSION
|
---|
2669 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET,
|
---|
2670 | s->session->master_key_length,
|
---|
2671 | s->session->master_key))
|
---|
2672 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) {
|
---|
2673 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB);
|
---|
2674 | goto err;
|
---|
2675 | }
|
---|
2676 | #ifndef OPENSSL_NO_GOST
|
---|
2677 | {
|
---|
2678 | int pktype = EVP_PKEY_id(pkey);
|
---|
2679 | if (pktype == NID_id_GostR3410_2001
|
---|
2680 | || pktype == NID_id_GostR3410_2012_256
|
---|
2681 | || pktype == NID_id_GostR3410_2012_512)
|
---|
2682 | BUF_reverse(p + 2, NULL, u);
|
---|
2683 | }
|
---|
2684 | #endif
|
---|
2685 |
|
---|
2686 | s2n(u, p);
|
---|
2687 | n += u + 2;
|
---|
2688 | /* Digest cached records and discard handshake buffer */
|
---|
2689 | if (!ssl3_digest_cached_records(s, 0))
|
---|
2690 | goto err;
|
---|
2691 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) {
|
---|
2692 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR);
|
---|
2693 | goto err;
|
---|
2694 | }
|
---|
2695 |
|
---|
2696 | EVP_MD_CTX_free(mctx);
|
---|
2697 | return 1;
|
---|
2698 | err:
|
---|
2699 | EVP_MD_CTX_free(mctx);
|
---|
2700 | return 0;
|
---|
2701 | }
|
---|
2702 |
|
---|
2703 | /*
|
---|
2704 | * Check a certificate can be used for client authentication. Currently check
|
---|
2705 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client
|
---|
2706 | * certificates can be used and optionally checks suitability for Suite B.
|
---|
2707 | */
|
---|
2708 | static int ssl3_check_client_certificate(SSL *s)
|
---|
2709 | {
|
---|
2710 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey)
|
---|
2711 | return 0;
|
---|
2712 | /* If no suitable signature algorithm can't use certificate */
|
---|
2713 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys])
|
---|
2714 | return 0;
|
---|
2715 | /*
|
---|
2716 | * If strict mode check suitability of chain before using it. This also
|
---|
2717 | * adjusts suite B digest if necessary.
|
---|
2718 | */
|
---|
2719 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT &&
|
---|
2720 | !tls1_check_chain(s, NULL, NULL, NULL, -2))
|
---|
2721 | return 0;
|
---|
2722 | return 1;
|
---|
2723 | }
|
---|
2724 |
|
---|
2725 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst)
|
---|
2726 | {
|
---|
2727 | X509 *x509 = NULL;
|
---|
2728 | EVP_PKEY *pkey = NULL;
|
---|
2729 | int i;
|
---|
2730 |
|
---|
2731 | if (wst == WORK_MORE_A) {
|
---|
2732 | /* Let cert callback update client certificates if required */
|
---|
2733 | if (s->cert->cert_cb) {
|
---|
2734 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg);
|
---|
2735 | if (i < 0) {
|
---|
2736 | s->rwstate = SSL_X509_LOOKUP;
|
---|
2737 | return WORK_MORE_A;
|
---|
2738 | }
|
---|
2739 | if (i == 0) {
|
---|
2740 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2741 | ossl_statem_set_error(s);
|
---|
2742 | return 0;
|
---|
2743 | }
|
---|
2744 | s->rwstate = SSL_NOTHING;
|
---|
2745 | }
|
---|
2746 | if (ssl3_check_client_certificate(s))
|
---|
2747 | return WORK_FINISHED_CONTINUE;
|
---|
2748 |
|
---|
2749 | /* Fall through to WORK_MORE_B */
|
---|
2750 | wst = WORK_MORE_B;
|
---|
2751 | }
|
---|
2752 |
|
---|
2753 | /* We need to get a client cert */
|
---|
2754 | if (wst == WORK_MORE_B) {
|
---|
2755 | /*
|
---|
2756 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP;
|
---|
2757 | * return(-1); We then get retied later
|
---|
2758 | */
|
---|
2759 | i = ssl_do_client_cert_cb(s, &x509, &pkey);
|
---|
2760 | if (i < 0) {
|
---|
2761 | s->rwstate = SSL_X509_LOOKUP;
|
---|
2762 | return WORK_MORE_B;
|
---|
2763 | }
|
---|
2764 | s->rwstate = SSL_NOTHING;
|
---|
2765 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) {
|
---|
2766 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey))
|
---|
2767 | i = 0;
|
---|
2768 | } else if (i == 1) {
|
---|
2769 | i = 0;
|
---|
2770 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE,
|
---|
2771 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
|
---|
2772 | }
|
---|
2773 |
|
---|
2774 | X509_free(x509);
|
---|
2775 | EVP_PKEY_free(pkey);
|
---|
2776 | if (i && !ssl3_check_client_certificate(s))
|
---|
2777 | i = 0;
|
---|
2778 | if (i == 0) {
|
---|
2779 | if (s->version == SSL3_VERSION) {
|
---|
2780 | s->s3->tmp.cert_req = 0;
|
---|
2781 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE);
|
---|
2782 | return WORK_FINISHED_CONTINUE;
|
---|
2783 | } else {
|
---|
2784 | s->s3->tmp.cert_req = 2;
|
---|
2785 | if (!ssl3_digest_cached_records(s, 0)) {
|
---|
2786 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2787 | ossl_statem_set_error(s);
|
---|
2788 | return 0;
|
---|
2789 | }
|
---|
2790 | }
|
---|
2791 | }
|
---|
2792 |
|
---|
2793 | return WORK_FINISHED_CONTINUE;
|
---|
2794 | }
|
---|
2795 |
|
---|
2796 | /* Shouldn't ever get here */
|
---|
2797 | return WORK_ERROR;
|
---|
2798 | }
|
---|
2799 |
|
---|
2800 | int tls_construct_client_certificate(SSL *s)
|
---|
2801 | {
|
---|
2802 | if (!ssl3_output_cert_chain(s,
|
---|
2803 | (s->s3->tmp.cert_req ==
|
---|
2804 | 2) ? NULL : s->cert->key)) {
|
---|
2805 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR);
|
---|
2806 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR);
|
---|
2807 | ossl_statem_set_error(s);
|
---|
2808 | return 0;
|
---|
2809 | }
|
---|
2810 |
|
---|
2811 | return 1;
|
---|
2812 | }
|
---|
2813 |
|
---|
2814 | #define has_bits(i,m) (((i)&(m)) == (m))
|
---|
2815 |
|
---|
2816 | int ssl3_check_cert_and_algorithm(SSL *s)
|
---|
2817 | {
|
---|
2818 | int i;
|
---|
2819 | #ifndef OPENSSL_NO_EC
|
---|
2820 | int idx;
|
---|
2821 | #endif
|
---|
2822 | long alg_k, alg_a;
|
---|
2823 | EVP_PKEY *pkey = NULL;
|
---|
2824 | int al = SSL_AD_HANDSHAKE_FAILURE;
|
---|
2825 |
|
---|
2826 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
|
---|
2827 | alg_a = s->s3->tmp.new_cipher->algorithm_auth;
|
---|
2828 |
|
---|
2829 | /* we don't have a certificate */
|
---|
2830 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK))
|
---|
2831 | return (1);
|
---|
2832 |
|
---|
2833 | /* This is the passed certificate */
|
---|
2834 |
|
---|
2835 | #ifndef OPENSSL_NO_EC
|
---|
2836 | idx = s->session->peer_type;
|
---|
2837 | if (idx == SSL_PKEY_ECC) {
|
---|
2838 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) {
|
---|
2839 | /* check failed */
|
---|
2840 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT);
|
---|
2841 | goto f_err;
|
---|
2842 | } else {
|
---|
2843 | return 1;
|
---|
2844 | }
|
---|
2845 | } else if (alg_a & SSL_aECDSA) {
|
---|
2846 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
2847 | SSL_R_MISSING_ECDSA_SIGNING_CERT);
|
---|
2848 | goto f_err;
|
---|
2849 | }
|
---|
2850 | #endif
|
---|
2851 | pkey = X509_get0_pubkey(s->session->peer);
|
---|
2852 | i = X509_certificate_type(s->session->peer, pkey);
|
---|
2853 |
|
---|
2854 | /* Check that we have a certificate if we require one */
|
---|
2855 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) {
|
---|
2856 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
2857 | SSL_R_MISSING_RSA_SIGNING_CERT);
|
---|
2858 | goto f_err;
|
---|
2859 | }
|
---|
2860 | #ifndef OPENSSL_NO_DSA
|
---|
2861 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) {
|
---|
2862 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
2863 | SSL_R_MISSING_DSA_SIGNING_CERT);
|
---|
2864 | goto f_err;
|
---|
2865 | }
|
---|
2866 | #endif
|
---|
2867 | #ifndef OPENSSL_NO_RSA
|
---|
2868 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) &&
|
---|
2869 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) {
|
---|
2870 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,
|
---|
2871 | SSL_R_MISSING_RSA_ENCRYPTING_CERT);
|
---|
2872 | goto f_err;
|
---|
2873 | }
|
---|
2874 | #endif
|
---|
2875 | #ifndef OPENSSL_NO_DH
|
---|
2876 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) {
|
---|
2877 | al = SSL_AD_INTERNAL_ERROR;
|
---|
2878 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR);
|
---|
2879 | goto f_err;
|
---|
2880 | }
|
---|
2881 | #endif
|
---|
2882 |
|
---|
2883 | return (1);
|
---|
2884 | f_err:
|
---|
2885 | ssl3_send_alert(s, SSL3_AL_FATAL, al);
|
---|
2886 | return (0);
|
---|
2887 | }
|
---|
2888 |
|
---|
2889 | #ifndef OPENSSL_NO_NEXTPROTONEG
|
---|
2890 | int tls_construct_next_proto(SSL *s)
|
---|
2891 | {
|
---|
2892 | unsigned int len, padding_len;
|
---|
2893 | unsigned char *d;
|
---|
2894 |
|
---|
2895 | len = s->next_proto_negotiated_len;
|
---|
2896 | padding_len = 32 - ((len + 2) % 32);
|
---|
2897 | d = (unsigned char *)s->init_buf->data;
|
---|
2898 | d[4] = len;
|
---|
2899 | memcpy(d + 5, s->next_proto_negotiated, len);
|
---|
2900 | d[5 + len] = padding_len;
|
---|
2901 | memset(d + 6 + len, 0, padding_len);
|
---|
2902 | *(d++) = SSL3_MT_NEXT_PROTO;
|
---|
2903 | l2n3(2 + len + padding_len, d);
|
---|
2904 | s->init_num = 4 + 2 + len + padding_len;
|
---|
2905 | s->init_off = 0;
|
---|
2906 |
|
---|
2907 | return 1;
|
---|
2908 | }
|
---|
2909 | #endif
|
---|
2910 |
|
---|
2911 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
|
---|
2912 | {
|
---|
2913 | int i = 0;
|
---|
2914 | #ifndef OPENSSL_NO_ENGINE
|
---|
2915 | if (s->ctx->client_cert_engine) {
|
---|
2916 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
|
---|
2917 | SSL_get_client_CA_list(s),
|
---|
2918 | px509, ppkey, NULL, NULL, NULL);
|
---|
2919 | if (i != 0)
|
---|
2920 | return i;
|
---|
2921 | }
|
---|
2922 | #endif
|
---|
2923 | if (s->ctx->client_cert_cb)
|
---|
2924 | i = s->ctx->client_cert_cb(s, px509, ppkey);
|
---|
2925 | return i;
|
---|
2926 | }
|
---|
2927 |
|
---|
2928 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, unsigned char *p)
|
---|
2929 | {
|
---|
2930 | int i, j = 0;
|
---|
2931 | const SSL_CIPHER *c;
|
---|
2932 | unsigned char *q;
|
---|
2933 | int empty_reneg_info_scsv = !s->renegotiate;
|
---|
2934 | /* Set disabled masks for this session */
|
---|
2935 | ssl_set_client_disabled(s);
|
---|
2936 |
|
---|
2937 | if (sk == NULL)
|
---|
2938 | return (0);
|
---|
2939 | q = p;
|
---|
2940 |
|
---|
2941 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
|
---|
2942 | c = sk_SSL_CIPHER_value(sk, i);
|
---|
2943 | /* Skip disabled ciphers */
|
---|
2944 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED))
|
---|
2945 | continue;
|
---|
2946 | j = s->method->put_cipher_by_char(c, p);
|
---|
2947 | p += j;
|
---|
2948 | }
|
---|
2949 | /*
|
---|
2950 | * If p == q, no ciphers; caller indicates an error. Otherwise, add
|
---|
2951 | * applicable SCSVs.
|
---|
2952 | */
|
---|
2953 | if (p != q) {
|
---|
2954 | if (empty_reneg_info_scsv) {
|
---|
2955 | static SSL_CIPHER scsv = {
|
---|
2956 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
---|
2957 | };
|
---|
2958 | j = s->method->put_cipher_by_char(&scsv, p);
|
---|
2959 | p += j;
|
---|
2960 | }
|
---|
2961 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) {
|
---|
2962 | static SSL_CIPHER scsv = {
|
---|
2963 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0
|
---|
2964 | };
|
---|
2965 | j = s->method->put_cipher_by_char(&scsv, p);
|
---|
2966 | p += j;
|
---|
2967 | }
|
---|
2968 | }
|
---|
2969 |
|
---|
2970 | return (p - q);
|
---|
2971 | }
|
---|