1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 2010 - 2011, Hoi-Ho Chan, <hoiho.chan@gmail.com>
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9 | * Copyright (C) 2012 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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10 | *
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11 | * This software is licensed as described in the file COPYING, which
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12 | * you should have received as part of this distribution. The terms
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13 | * are also available at https://curl.haxx.se/docs/copyright.html.
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14 | *
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15 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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16 | * copies of the Software, and permit persons to whom the Software is
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17 | * furnished to do so, under the terms of the COPYING file.
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18 | *
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19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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20 | * KIND, either express or implied.
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21 | *
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22 | ***************************************************************************/
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23 |
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24 | /*
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25 | * Source file for all mbedTSL-specific code for the TLS/SSL layer. No code
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26 | * but vtls.c should ever call or use these functions.
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27 | *
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28 | */
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29 |
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30 | #include "curl_setup.h"
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31 |
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32 | #ifdef USE_MBEDTLS
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33 |
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34 | #include <mbedtls/net.h>
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35 | #include <mbedtls/ssl.h>
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36 | #include <mbedtls/certs.h>
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37 | #include <mbedtls/x509.h>
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38 | #include <mbedtls/version.h>
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39 |
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40 | #include <mbedtls/error.h>
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41 | #include <mbedtls/entropy.h>
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42 | #include <mbedtls/ctr_drbg.h>
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43 |
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44 | #include "urldata.h"
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45 | #include "sendf.h"
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46 | #include "inet_pton.h"
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47 | #include "mbedtls.h"
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48 | #include "vtls.h"
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49 | #include "parsedate.h"
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50 | #include "connect.h" /* for the connect timeout */
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51 | #include "select.h"
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52 | #include "rawstr.h"
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53 | #include "polarssl_threadlock.h"
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54 |
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55 | #define _MPRINTF_REPLACE /* use our functions only */
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56 | #include <curl/mprintf.h>
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57 | #include "curl_memory.h"
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58 | /* The last #include file should be: */
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59 | #include "memdebug.h"
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60 |
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61 | /* apply threading? */
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62 | #if defined(USE_THREADS_POSIX) || defined(USE_THREADS_WIN32)
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63 | #define THREADING_SUPPORT
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64 | #endif
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65 |
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66 | #if defined(THREADING_SUPPORT)
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67 | static mbedtls_entropy_context entropy;
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68 |
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69 | static int entropy_init_initialized = 0;
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70 |
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71 | /* start of entropy_init_mutex() */
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72 | static void entropy_init_mutex(mbedtls_entropy_context *ctx)
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73 | {
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74 | /* lock 0 = entropy_init_mutex() */
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75 | Curl_polarsslthreadlock_lock_function(0);
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76 | if(entropy_init_initialized == 0) {
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77 | mbedtls_entropy_init(ctx);
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78 | entropy_init_initialized = 1;
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79 | }
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80 | Curl_polarsslthreadlock_unlock_function(0);
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81 | }
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82 | /* end of entropy_init_mutex() */
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83 |
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84 | /* start of entropy_func_mutex() */
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85 | static int entropy_func_mutex(void *data, unsigned char *output, size_t len)
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86 | {
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87 | int ret;
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88 | /* lock 1 = entropy_func_mutex() */
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89 | Curl_polarsslthreadlock_lock_function(1);
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90 | ret = mbedtls_entropy_func(data, output, len);
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91 | Curl_polarsslthreadlock_unlock_function(1);
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92 |
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93 | return ret;
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94 | }
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95 | /* end of entropy_func_mutex() */
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96 |
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97 | #endif /* THREADING_SUPPORT */
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98 |
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99 | /* Define this to enable lots of debugging for mbedTLS */
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100 | #undef MBEDTLS_DEBUG
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101 |
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102 | #ifdef MBEDTLS_DEBUG
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103 | static void mbedtls_debug(void *context, int level, const char *line)
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104 | {
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105 | struct SessionHandle *data = NULL;
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106 |
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107 | if(!context)
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108 | return;
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109 |
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110 | data = (struct SessionHandle *)context;
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111 |
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112 | infof(data, "%s", line);
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113 | (void) level;
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114 | }
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115 | #else
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116 | #endif
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117 |
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118 | /* ALPN for http2? */
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119 | #ifdef USE_NGHTTP2
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120 | # undef HAS_ALPN
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121 | # ifdef MBEDTLS_SSL_ALPN
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122 | # define HAS_ALPN
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123 | # endif
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124 | #endif
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125 |
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126 |
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127 | /*
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128 | * profile
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129 | */
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130 | const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_fr =
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131 | {
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132 | /* Hashes from SHA-1 and above */
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133 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
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134 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_RIPEMD160 ) |
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135 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
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136 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
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137 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
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138 | MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
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139 | 0xFFFFFFF, /* Any PK alg */
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140 | 0xFFFFFFF, /* Any curve */
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141 | 1024, /* RSA min key len */
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142 | };
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143 |
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144 | /* See https://tls.mbed.org/discussions/generic/
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145 | howto-determine-exact-buffer-len-for-mbedtls_pk_write_pubkey_der
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146 | */
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147 | #define RSA_PUB_DER_MAX_BYTES (38 + 2 * MBEDTLS_MPI_MAX_SIZE)
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148 | #define ECP_PUB_DER_MAX_BYTES (30 + 2 * MBEDTLS_ECP_MAX_BYTES)
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149 |
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150 | #define PUB_DER_MAX_BYTES (RSA_PUB_DER_MAX_BYTES > ECP_PUB_DER_MAX_BYTES ? \
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151 | RSA_PUB_DER_MAX_BYTES : ECP_PUB_DER_MAX_BYTES)
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152 |
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153 | static Curl_recv mbedtls_recv;
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154 | static Curl_send mbedtls_send;
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155 |
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156 | static CURLcode
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157 | mbedtls_connect_step1(struct connectdata *conn,
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158 | int sockindex)
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159 | {
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160 | struct SessionHandle *data = conn->data;
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161 | struct ssl_connect_data* connssl = &conn->ssl[sockindex];
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162 |
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163 | bool sni = TRUE; /* default is SNI enabled */
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164 | int ret = -1;
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165 | #ifdef ENABLE_IPV6
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166 | struct in6_addr addr;
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167 | #else
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168 | struct in_addr addr;
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169 | #endif
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170 | void *old_session = NULL;
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171 | size_t old_session_size = 0;
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172 | char errorbuf[128];
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173 | errorbuf[0]=0;
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174 |
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175 | /* mbedTLS only supports SSLv3 and TLSv1 */
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176 | if(data->set.ssl.version == CURL_SSLVERSION_SSLv2) {
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177 | failf(data, "mbedTLS does not support SSLv2");
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178 | return CURLE_SSL_CONNECT_ERROR;
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179 | }
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180 | else if(data->set.ssl.version == CURL_SSLVERSION_SSLv3)
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181 | sni = FALSE; /* SSLv3 has no SNI */
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182 |
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183 | #ifdef THREADING_SUPPORT
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184 | entropy_init_mutex(&entropy);
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185 | mbedtls_ctr_drbg_init(&connssl->ctr_drbg);
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186 |
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187 | ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, entropy_func_mutex,
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188 | &entropy, connssl->ssn.id,
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189 | connssl->ssn.id_len);
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190 | if(ret) {
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191 | #ifdef MBEDTLS_ERROR_C
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192 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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193 | #endif /* MBEDTLS_ERROR_C */
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194 | failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n",
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195 | -ret, errorbuf);
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196 | }
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197 | #else
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198 | mbedtls_entropy_init(&connssl->entropy);
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199 | mbedtls_ctr_drbg_init(&connssl->ctr_drbg);
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200 |
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201 | ret = mbedtls_ctr_drbg_seed(&connssl->ctr_drbg, mbedtls_entropy_func,
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202 | &connssl->entropy, connssl->ssn.id,
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203 | connssl->ssn.id_len);
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204 | if(ret) {
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205 | #ifdef MBEDTLS_ERROR_C
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206 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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207 | #endif /* MBEDTLS_ERROR_C */
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208 | failf(data, "Failed - mbedTLS: ctr_drbg_init returned (-0x%04X) %s\n",
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209 | -ret, errorbuf);
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210 | }
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211 | #endif /* THREADING_SUPPORT */
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212 |
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213 | /* Load the trusted CA */
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214 | memset(&connssl->cacert, 0, sizeof(mbedtls_x509_crt));
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215 |
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216 | if(data->set.str[STRING_SSL_CAFILE]) {
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217 | ret = mbedtls_x509_crt_parse_file(&connssl->cacert,
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218 | data->set.str[STRING_SSL_CAFILE]);
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219 |
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220 | if(ret<0) {
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221 | #ifdef MBEDTLS_ERROR_C
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222 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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223 | #endif /* MBEDTLS_ERROR_C */
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224 | failf(data, "Error reading ca cert file %s - mbedTLS: (-0x%04X) %s",
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225 | data->set.str[STRING_SSL_CAFILE], -ret, errorbuf);
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226 |
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227 | if(data->set.ssl.verifypeer)
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228 | return CURLE_SSL_CACERT_BADFILE;
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229 | }
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230 | }
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231 |
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232 | if(data->set.str[STRING_SSL_CAPATH]) {
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233 | ret = mbedtls_x509_crt_parse_path(&connssl->cacert,
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234 | data->set.str[STRING_SSL_CAPATH]);
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235 |
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236 | if(ret<0) {
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237 | #ifdef MBEDTLS_ERROR_C
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238 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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239 | #endif /* MBEDTLS_ERROR_C */
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240 | failf(data, "Error reading ca cert path %s - mbedTLS: (-0x%04X) %s",
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241 | data->set.str[STRING_SSL_CAPATH], -ret, errorbuf);
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242 |
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243 | if(data->set.ssl.verifypeer)
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244 | return CURLE_SSL_CACERT_BADFILE;
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245 | }
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246 | }
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247 |
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248 | /* Load the client certificate */
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249 | memset(&connssl->clicert, 0, sizeof(mbedtls_x509_crt));
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250 |
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251 | if(data->set.str[STRING_CERT]) {
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252 | ret = mbedtls_x509_crt_parse_file(&connssl->clicert,
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253 | data->set.str[STRING_CERT]);
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254 |
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255 | if(ret) {
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256 | #ifdef MBEDTLS_ERROR_C
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257 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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258 | #endif /* MBEDTLS_ERROR_C */
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259 | failf(data, "Error reading client cert file %s - mbedTLS: (-0x%04X) %s",
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260 | data->set.str[STRING_CERT], -ret, errorbuf);
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261 |
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262 | return CURLE_SSL_CERTPROBLEM;
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263 | }
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264 | }
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265 |
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266 | /* Load the client private key */
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267 | if(data->set.str[STRING_KEY]) {
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268 | mbedtls_pk_init(&connssl->pk);
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269 | ret = mbedtls_pk_parse_keyfile(&connssl->pk, data->set.str[STRING_KEY],
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270 | data->set.str[STRING_KEY_PASSWD]);
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271 | if(ret == 0 && !mbedtls_pk_can_do(&connssl->pk, MBEDTLS_PK_RSA))
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272 | ret = MBEDTLS_ERR_PK_TYPE_MISMATCH;
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273 |
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274 | if(ret) {
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275 | #ifdef MBEDTLS_ERROR_C
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276 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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277 | #endif /* MBEDTLS_ERROR_C */
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278 | failf(data, "Error reading private key %s - mbedTLS: (-0x%04X) %s",
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279 | data->set.str[STRING_KEY], -ret, errorbuf);
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280 |
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281 | return CURLE_SSL_CERTPROBLEM;
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282 | }
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283 | }
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284 |
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285 | /* Load the CRL */
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286 | memset(&connssl->crl, 0, sizeof(mbedtls_x509_crl));
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287 |
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288 | if(data->set.str[STRING_SSL_CRLFILE]) {
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289 | ret = mbedtls_x509_crl_parse_file(&connssl->crl,
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290 | data->set.str[STRING_SSL_CRLFILE]);
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291 |
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292 | if(ret) {
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293 | #ifdef MBEDTLS_ERROR_C
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294 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
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295 | #endif /* MBEDTLS_ERROR_C */
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296 | failf(data, "Error reading CRL file %s - mbedTLS: (-0x%04X) %s",
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297 | data->set.str[STRING_SSL_CRLFILE], -ret, errorbuf);
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298 |
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299 | return CURLE_SSL_CRL_BADFILE;
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300 | }
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301 | }
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302 |
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303 | infof(data, "mbedTLS: Connecting to %s:%d\n",
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304 | conn->host.name, conn->remote_port);
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305 |
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306 | mbedtls_ssl_config_init(&connssl->config);
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307 |
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308 | mbedtls_ssl_init(&connssl->ssl);
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309 | if(mbedtls_ssl_setup(&connssl->ssl, &connssl->config)) {
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310 | failf(data, "mbedTLS: ssl_init failed");
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311 | return CURLE_SSL_CONNECT_ERROR;
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312 | }
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313 | ret = mbedtls_ssl_config_defaults(&connssl->config,
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314 | MBEDTLS_SSL_IS_CLIENT,
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315 | MBEDTLS_SSL_TRANSPORT_STREAM,
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316 | MBEDTLS_SSL_PRESET_DEFAULT);
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317 | if(ret) {
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318 | failf(data, "mbedTLS: ssl_config failed");
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319 | return CURLE_SSL_CONNECT_ERROR;
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320 | }
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321 |
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322 | /* new profile with RSA min key len = 1024 ... */
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323 | mbedtls_ssl_conf_cert_profile( &connssl->config,
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324 | &mbedtls_x509_crt_profile_fr);
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325 |
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326 | switch(data->set.ssl.version) {
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327 | case CURL_SSLVERSION_SSLv3:
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328 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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329 | MBEDTLS_SSL_MINOR_VERSION_0);
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330 | infof(data, "mbedTLS: Forced min. SSL Version to be SSLv3\n");
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331 | break;
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332 | case CURL_SSLVERSION_TLSv1_0:
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333 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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334 | MBEDTLS_SSL_MINOR_VERSION_1);
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335 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.0\n");
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336 | break;
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337 | case CURL_SSLVERSION_TLSv1_1:
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338 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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339 | MBEDTLS_SSL_MINOR_VERSION_2);
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340 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.1\n");
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341 | break;
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342 | case CURL_SSLVERSION_TLSv1_2:
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343 | mbedtls_ssl_conf_min_version(&connssl->config, MBEDTLS_SSL_MAJOR_VERSION_3,
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344 | MBEDTLS_SSL_MINOR_VERSION_3);
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345 | infof(data, "mbedTLS: Forced min. SSL Version to be TLS 1.2\n");
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346 | break;
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347 | }
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348 |
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349 | mbedtls_ssl_conf_authmode(&connssl->config, MBEDTLS_SSL_VERIFY_OPTIONAL);
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350 |
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351 | mbedtls_ssl_conf_rng(&connssl->config, mbedtls_ctr_drbg_random,
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352 | &connssl->ctr_drbg);
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353 | mbedtls_ssl_set_bio(&connssl->ssl, &conn->sock[sockindex],
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354 | mbedtls_net_send,
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355 | mbedtls_net_recv,
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356 | NULL /* rev_timeout() */);
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357 |
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358 | mbedtls_ssl_conf_ciphersuites(&connssl->config,
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359 | mbedtls_ssl_list_ciphersuites());
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360 | if(!Curl_ssl_getsessionid(conn, &old_session, &old_session_size)) {
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361 | memcpy(&connssl->ssn, old_session, old_session_size);
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362 | infof(data, "mbedTLS re-using session\n");
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363 | }
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364 |
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365 | mbedtls_ssl_set_session(&connssl->ssl,
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366 | &connssl->ssn);
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367 |
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368 | mbedtls_ssl_conf_ca_chain(&connssl->config,
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369 | &connssl->cacert,
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370 | &connssl->crl);
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371 |
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372 | if(data->set.str[STRING_KEY]) {
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373 | mbedtls_ssl_conf_own_cert(&connssl->config,
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374 | &connssl->clicert, &connssl->pk);
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375 | }
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376 | if(!Curl_inet_pton(AF_INET, conn->host.name, &addr) &&
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377 | #ifdef ENABLE_IPV6
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378 | !Curl_inet_pton(AF_INET6, conn->host.name, &addr) &&
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379 | #endif
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380 | sni && mbedtls_ssl_set_hostname(&connssl->ssl, conn->host.name)) {
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381 | infof(data, "WARNING: failed to configure "
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382 | "server name indication (SNI) TLS extension\n");
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383 | }
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384 |
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385 | #ifdef HAS_ALPN
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386 | if(data->set.ssl_enable_alpn) {
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387 | const char *protocols[3];
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388 | const char **p = protocols;
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389 | #ifdef USE_NGHTTP2
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390 | if(data->set.httpversion >= CURL_HTTP_VERSION_2)
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391 | *p++ = NGHTTP2_PROTO_VERSION_ID;
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392 | #endif
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393 | *p++ = ALPN_HTTP_1_1;
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394 | *p = NULL;
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395 | if(mbedtls_ssl_conf_alpn_protocols(&connssl->config, protocols)) {
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396 | failf(data, "Failed setting ALPN protocols");
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397 | return CURLE_SSL_CONNECT_ERROR;
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398 | }
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399 | for(p = protocols; *p; ++p)
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400 | infof(data, "ALPN, offering %s\n", *p);
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401 | }
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402 | #endif
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403 |
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404 | #ifdef MBEDTLS_DEBUG
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405 | mbedtls_ssl_conf_dbg(&connssl->ssl, mbedtls_debug, data);
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406 | #endif
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407 |
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408 | connssl->connecting_state = ssl_connect_2;
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409 |
|
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410 | return CURLE_OK;
|
---|
411 | }
|
---|
412 |
|
---|
413 | static CURLcode
|
---|
414 | mbedtls_connect_step2(struct connectdata *conn,
|
---|
415 | int sockindex)
|
---|
416 | {
|
---|
417 | int ret;
|
---|
418 | struct SessionHandle *data = conn->data;
|
---|
419 | struct ssl_connect_data* connssl = &conn->ssl[sockindex];
|
---|
420 | const mbedtls_x509_crt *peercert;
|
---|
421 |
|
---|
422 | #ifdef HAS_ALPN
|
---|
423 | const char* next_protocol;
|
---|
424 | #endif
|
---|
425 |
|
---|
426 | char errorbuf[128];
|
---|
427 | errorbuf[0] = 0;
|
---|
428 |
|
---|
429 | conn->recv[sockindex] = mbedtls_recv;
|
---|
430 | conn->send[sockindex] = mbedtls_send;
|
---|
431 |
|
---|
432 | ret = mbedtls_ssl_handshake(&connssl->ssl);
|
---|
433 |
|
---|
434 | if(ret == MBEDTLS_ERR_SSL_WANT_READ) {
|
---|
435 | connssl->connecting_state = ssl_connect_2_reading;
|
---|
436 | return CURLE_OK;
|
---|
437 | }
|
---|
438 | else if(ret == MBEDTLS_ERR_SSL_WANT_WRITE) {
|
---|
439 | connssl->connecting_state = ssl_connect_2_writing;
|
---|
440 | return CURLE_OK;
|
---|
441 | }
|
---|
442 | else if(ret) {
|
---|
443 | #ifdef MBEDTLS_ERROR_C
|
---|
444 | mbedtls_strerror(ret, errorbuf, sizeof(errorbuf));
|
---|
445 | #endif /* MBEDTLS_ERROR_C */
|
---|
446 | failf(data, "ssl_handshake returned - mbedTLS: (-0x%04X) %s",
|
---|
447 | -ret, errorbuf);
|
---|
448 | return CURLE_SSL_CONNECT_ERROR;
|
---|
449 | }
|
---|
450 |
|
---|
451 | infof(data, "mbedTLS: Handshake complete, cipher is %s\n",
|
---|
452 | mbedtls_ssl_get_ciphersuite(&conn->ssl[sockindex].ssl)
|
---|
453 | );
|
---|
454 |
|
---|
455 | ret = mbedtls_ssl_get_verify_result(&conn->ssl[sockindex].ssl);
|
---|
456 |
|
---|
457 | if(ret && data->set.ssl.verifypeer) {
|
---|
458 | if(ret & MBEDTLS_X509_BADCERT_EXPIRED)
|
---|
459 | failf(data, "Cert verify failed: BADCERT_EXPIRED");
|
---|
460 |
|
---|
461 | if(ret & MBEDTLS_X509_BADCERT_REVOKED) {
|
---|
462 | failf(data, "Cert verify failed: BADCERT_REVOKED");
|
---|
463 | return CURLE_SSL_CACERT;
|
---|
464 | }
|
---|
465 |
|
---|
466 | if(ret & MBEDTLS_X509_BADCERT_CN_MISMATCH)
|
---|
467 | failf(data, "Cert verify failed: BADCERT_CN_MISMATCH");
|
---|
468 |
|
---|
469 | if(ret & MBEDTLS_X509_BADCERT_NOT_TRUSTED)
|
---|
470 | failf(data, "Cert verify failed: BADCERT_NOT_TRUSTED");
|
---|
471 |
|
---|
472 | return CURLE_PEER_FAILED_VERIFICATION;
|
---|
473 | }
|
---|
474 |
|
---|
475 | peercert = mbedtls_ssl_get_peer_cert(&connssl->ssl);
|
---|
476 |
|
---|
477 | if(peercert && data->set.verbose) {
|
---|
478 | const size_t bufsize = 16384;
|
---|
479 | char *buffer = malloc(bufsize);
|
---|
480 |
|
---|
481 | if(!buffer)
|
---|
482 | return CURLE_OUT_OF_MEMORY;
|
---|
483 |
|
---|
484 | if(mbedtls_x509_crt_info(buffer, bufsize, "* ", peercert) > 0)
|
---|
485 | infof(data, "Dumping cert info:\n%s\n", buffer);
|
---|
486 | else
|
---|
487 | infof(data, "Unable to dump certificate information.\n");
|
---|
488 |
|
---|
489 | free(buffer);
|
---|
490 | }
|
---|
491 |
|
---|
492 | if(data->set.str[STRING_SSL_PINNEDPUBLICKEY]) {
|
---|
493 | int size;
|
---|
494 | CURLcode result;
|
---|
495 | mbedtls_x509_crt *p;
|
---|
496 | unsigned char pubkey[PUB_DER_MAX_BYTES];
|
---|
497 |
|
---|
498 | if(!peercert || !peercert->raw.p || !peercert->raw.len) {
|
---|
499 | failf(data, "Failed due to missing peer certificate");
|
---|
500 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
501 | }
|
---|
502 |
|
---|
503 | p = calloc(1, sizeof(*p));
|
---|
504 |
|
---|
505 | if(!p)
|
---|
506 | return CURLE_OUT_OF_MEMORY;
|
---|
507 |
|
---|
508 | mbedtls_x509_crt_init(p);
|
---|
509 |
|
---|
510 | /* Make a copy of our const peercert because mbedtls_pk_write_pubkey_der
|
---|
511 | needs a non-const key, for now.
|
---|
512 | https://github.com/ARMmbed/mbedtls/issues/396 */
|
---|
513 | if(mbedtls_x509_crt_parse_der(p, peercert->raw.p, peercert->raw.len)) {
|
---|
514 | failf(data, "Failed copying peer certificate");
|
---|
515 | mbedtls_x509_crt_free(p);
|
---|
516 | free(p);
|
---|
517 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
518 | }
|
---|
519 |
|
---|
520 | size = mbedtls_pk_write_pubkey_der(&p->pk, pubkey, PUB_DER_MAX_BYTES);
|
---|
521 |
|
---|
522 | if(size <= 0) {
|
---|
523 | failf(data, "Failed copying public key from peer certificate");
|
---|
524 | mbedtls_x509_crt_free(p);
|
---|
525 | free(p);
|
---|
526 | return CURLE_SSL_PINNEDPUBKEYNOTMATCH;
|
---|
527 | }
|
---|
528 |
|
---|
529 | /* mbedtls_pk_write_pubkey_der writes data at the end of the buffer. */
|
---|
530 | result = Curl_pin_peer_pubkey(data,
|
---|
531 | data->set.str[STRING_SSL_PINNEDPUBLICKEY],
|
---|
532 | &pubkey[PUB_DER_MAX_BYTES - size], size);
|
---|
533 | if(result) {
|
---|
534 | mbedtls_x509_crt_free(p);
|
---|
535 | free(p);
|
---|
536 | return result;
|
---|
537 | }
|
---|
538 |
|
---|
539 | mbedtls_x509_crt_free(p);
|
---|
540 | free(p);
|
---|
541 | }
|
---|
542 |
|
---|
543 | #ifdef HAS_ALPN
|
---|
544 | if(data->set.ssl_enable_alpn) {
|
---|
545 | next_protocol = mbedtls_ssl_get_alpn_protocol(&connssl->ssl);
|
---|
546 |
|
---|
547 | if(next_protocol) {
|
---|
548 | infof(data, "ALPN, server accepted to use %s\n", next_protocol);
|
---|
549 | #ifdef USE_NGHTTP2
|
---|
550 | if(!strncmp(next_protocol, NGHTTP2_PROTO_VERSION_ID,
|
---|
551 | NGHTTP2_PROTO_VERSION_ID_LEN) &&
|
---|
552 | !next_protocol[NGHTTP2_PROTO_VERSION_ID_LEN]) {
|
---|
553 | conn->negnpn = CURL_HTTP_VERSION_2;
|
---|
554 | }
|
---|
555 | else
|
---|
556 | #endif
|
---|
557 | if(!strncmp(next_protocol, ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH) &&
|
---|
558 | !next_protocol[ALPN_HTTP_1_1_LENGTH]) {
|
---|
559 | conn->negnpn = CURL_HTTP_VERSION_1_1;
|
---|
560 | }
|
---|
561 | }
|
---|
562 | else {
|
---|
563 | infof(data, "ALPN, server did not agree to a protocol\n");
|
---|
564 | }
|
---|
565 | }
|
---|
566 | #endif
|
---|
567 |
|
---|
568 | connssl->connecting_state = ssl_connect_3;
|
---|
569 | infof(data, "SSL connected\n");
|
---|
570 |
|
---|
571 | return CURLE_OK;
|
---|
572 | }
|
---|
573 |
|
---|
574 | static CURLcode
|
---|
575 | mbedtls_connect_step3(struct connectdata *conn,
|
---|
576 | int sockindex)
|
---|
577 | {
|
---|
578 | CURLcode retcode = CURLE_OK;
|
---|
579 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
580 | struct SessionHandle *data = conn->data;
|
---|
581 | void *old_ssl_sessionid = NULL;
|
---|
582 | mbedtls_ssl_session *our_ssl_sessionid = &conn->ssl[sockindex].ssn;
|
---|
583 | int incache;
|
---|
584 |
|
---|
585 | DEBUGASSERT(ssl_connect_3 == connssl->connecting_state);
|
---|
586 |
|
---|
587 | /* Save the current session data for possible re-use */
|
---|
588 | incache = !(Curl_ssl_getsessionid(conn, &old_ssl_sessionid, NULL));
|
---|
589 | if(incache) {
|
---|
590 | if(old_ssl_sessionid != our_ssl_sessionid) {
|
---|
591 | infof(data, "old SSL session ID is stale, removing\n");
|
---|
592 | Curl_ssl_delsessionid(conn, old_ssl_sessionid);
|
---|
593 | incache = FALSE;
|
---|
594 | }
|
---|
595 | }
|
---|
596 | if(!incache) {
|
---|
597 | void *new_session = malloc(sizeof(mbedtls_ssl_session));
|
---|
598 |
|
---|
599 | if(new_session) {
|
---|
600 | memcpy(new_session, our_ssl_sessionid,
|
---|
601 | sizeof(mbedtls_ssl_session));
|
---|
602 |
|
---|
603 | retcode = Curl_ssl_addsessionid(conn, new_session,
|
---|
604 | sizeof(mbedtls_ssl_session));
|
---|
605 | }
|
---|
606 | else {
|
---|
607 | retcode = CURLE_OUT_OF_MEMORY;
|
---|
608 | }
|
---|
609 |
|
---|
610 | if(retcode) {
|
---|
611 | failf(data, "failed to store ssl session");
|
---|
612 | return retcode;
|
---|
613 | }
|
---|
614 | }
|
---|
615 |
|
---|
616 | connssl->connecting_state = ssl_connect_done;
|
---|
617 |
|
---|
618 | return CURLE_OK;
|
---|
619 | }
|
---|
620 |
|
---|
621 | static ssize_t mbedtls_send(struct connectdata *conn,
|
---|
622 | int sockindex,
|
---|
623 | const void *mem,
|
---|
624 | size_t len,
|
---|
625 | CURLcode *curlcode)
|
---|
626 | {
|
---|
627 | int ret = -1;
|
---|
628 |
|
---|
629 | ret = mbedtls_ssl_write(&conn->ssl[sockindex].ssl,
|
---|
630 | (unsigned char *)mem, len);
|
---|
631 |
|
---|
632 | if(ret < 0) {
|
---|
633 | *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_WRITE) ?
|
---|
634 | CURLE_AGAIN : CURLE_SEND_ERROR;
|
---|
635 | ret = -1;
|
---|
636 | }
|
---|
637 |
|
---|
638 | return ret;
|
---|
639 | }
|
---|
640 |
|
---|
641 | void Curl_mbedtls_close_all(struct SessionHandle *data)
|
---|
642 | {
|
---|
643 | (void)data;
|
---|
644 | }
|
---|
645 |
|
---|
646 | void Curl_mbedtls_close(struct connectdata *conn, int sockindex)
|
---|
647 | {
|
---|
648 | /* mbedtls_rsa_free(&conn->ssl[sockindex].rsa); */
|
---|
649 | mbedtls_x509_crt_free(&conn->ssl[sockindex].clicert);
|
---|
650 | mbedtls_x509_crt_free(&conn->ssl[sockindex].cacert);
|
---|
651 | mbedtls_x509_crl_free(&conn->ssl[sockindex].crl);
|
---|
652 | mbedtls_ssl_free(&conn->ssl[sockindex].ssl);
|
---|
653 | }
|
---|
654 |
|
---|
655 | static ssize_t mbedtls_recv(struct connectdata *conn,
|
---|
656 | int num,
|
---|
657 | char *buf,
|
---|
658 | size_t buffersize,
|
---|
659 | CURLcode *curlcode)
|
---|
660 | {
|
---|
661 | int ret = -1;
|
---|
662 | ssize_t len = -1;
|
---|
663 |
|
---|
664 | memset(buf, 0, buffersize);
|
---|
665 | ret = mbedtls_ssl_read(&conn->ssl[num].ssl, (unsigned char *)buf,
|
---|
666 | buffersize);
|
---|
667 |
|
---|
668 | if(ret <= 0) {
|
---|
669 | if(ret == MBEDTLS_ERR_SSL_PEER_CLOSE_NOTIFY)
|
---|
670 | return 0;
|
---|
671 |
|
---|
672 | *curlcode = (ret == MBEDTLS_ERR_SSL_WANT_READ) ?
|
---|
673 | CURLE_AGAIN : CURLE_RECV_ERROR;
|
---|
674 | return -1;
|
---|
675 | }
|
---|
676 |
|
---|
677 | len = ret;
|
---|
678 |
|
---|
679 | return len;
|
---|
680 | }
|
---|
681 |
|
---|
682 | void Curl_mbedtls_session_free(void *ptr)
|
---|
683 | {
|
---|
684 | free(ptr);
|
---|
685 | }
|
---|
686 |
|
---|
687 | size_t Curl_mbedtls_version(char *buffer, size_t size)
|
---|
688 | {
|
---|
689 | unsigned int version = mbedtls_version_get_number();
|
---|
690 | return snprintf(buffer, size, "mbedTLS/%d.%d.%d", version>>24,
|
---|
691 | (version>>16)&0xff, (version>>8)&0xff);
|
---|
692 | }
|
---|
693 |
|
---|
694 | static CURLcode
|
---|
695 | mbedtls_connect_common(struct connectdata *conn,
|
---|
696 | int sockindex,
|
---|
697 | bool nonblocking,
|
---|
698 | bool *done)
|
---|
699 | {
|
---|
700 | CURLcode retcode;
|
---|
701 | struct SessionHandle *data = conn->data;
|
---|
702 | struct ssl_connect_data *connssl = &conn->ssl[sockindex];
|
---|
703 | curl_socket_t sockfd = conn->sock[sockindex];
|
---|
704 | long timeout_ms;
|
---|
705 | int what;
|
---|
706 |
|
---|
707 | /* check if the connection has already been established */
|
---|
708 | if(ssl_connection_complete == connssl->state) {
|
---|
709 | *done = TRUE;
|
---|
710 | return CURLE_OK;
|
---|
711 | }
|
---|
712 |
|
---|
713 | if(ssl_connect_1==connssl->connecting_state) {
|
---|
714 | /* Find out how much more time we're allowed */
|
---|
715 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
716 |
|
---|
717 | if(timeout_ms < 0) {
|
---|
718 | /* no need to continue if time already is up */
|
---|
719 | failf(data, "SSL connection timeout");
|
---|
720 | return CURLE_OPERATION_TIMEDOUT;
|
---|
721 | }
|
---|
722 | retcode = mbedtls_connect_step1(conn, sockindex);
|
---|
723 | if(retcode)
|
---|
724 | return retcode;
|
---|
725 | }
|
---|
726 |
|
---|
727 | while(ssl_connect_2 == connssl->connecting_state ||
|
---|
728 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
729 | ssl_connect_2_writing == connssl->connecting_state) {
|
---|
730 |
|
---|
731 | /* check allowed time left */
|
---|
732 | timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
733 |
|
---|
734 | if(timeout_ms < 0) {
|
---|
735 | /* no need to continue if time already is up */
|
---|
736 | failf(data, "SSL connection timeout");
|
---|
737 | return CURLE_OPERATION_TIMEDOUT;
|
---|
738 | }
|
---|
739 |
|
---|
740 | /* if ssl is expecting something, check if it's available. */
|
---|
741 | if(connssl->connecting_state == ssl_connect_2_reading
|
---|
742 | || connssl->connecting_state == ssl_connect_2_writing) {
|
---|
743 |
|
---|
744 | curl_socket_t writefd = ssl_connect_2_writing==
|
---|
745 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
|
---|
746 | curl_socket_t readfd = ssl_connect_2_reading==
|
---|
747 | connssl->connecting_state?sockfd:CURL_SOCKET_BAD;
|
---|
748 |
|
---|
749 | what = Curl_socket_ready(readfd, writefd, nonblocking ? 0 : timeout_ms);
|
---|
750 | if(what < 0) {
|
---|
751 | /* fatal error */
|
---|
752 | failf(data, "select/poll on SSL socket, errno: %d", SOCKERRNO);
|
---|
753 | return CURLE_SSL_CONNECT_ERROR;
|
---|
754 | }
|
---|
755 | else if(0 == what) {
|
---|
756 | if(nonblocking) {
|
---|
757 | *done = FALSE;
|
---|
758 | return CURLE_OK;
|
---|
759 | }
|
---|
760 | else {
|
---|
761 | /* timeout */
|
---|
762 | failf(data, "SSL connection timeout");
|
---|
763 | return CURLE_OPERATION_TIMEDOUT;
|
---|
764 | }
|
---|
765 | }
|
---|
766 | /* socket is readable or writable */
|
---|
767 | }
|
---|
768 |
|
---|
769 | /* Run transaction, and return to the caller if it failed or if
|
---|
770 | * this connection is part of a multi handle and this loop would
|
---|
771 | * execute again. This permits the owner of a multi handle to
|
---|
772 | * abort a connection attempt before step2 has completed while
|
---|
773 | * ensuring that a client using select() or epoll() will always
|
---|
774 | * have a valid fdset to wait on.
|
---|
775 | */
|
---|
776 | retcode = mbedtls_connect_step2(conn, sockindex);
|
---|
777 | if(retcode || (nonblocking &&
|
---|
778 | (ssl_connect_2 == connssl->connecting_state ||
|
---|
779 | ssl_connect_2_reading == connssl->connecting_state ||
|
---|
780 | ssl_connect_2_writing == connssl->connecting_state)))
|
---|
781 | return retcode;
|
---|
782 |
|
---|
783 | } /* repeat step2 until all transactions are done. */
|
---|
784 |
|
---|
785 | if(ssl_connect_3==connssl->connecting_state) {
|
---|
786 | retcode = mbedtls_connect_step3(conn, sockindex);
|
---|
787 | if(retcode)
|
---|
788 | return retcode;
|
---|
789 | }
|
---|
790 |
|
---|
791 | if(ssl_connect_done==connssl->connecting_state) {
|
---|
792 | connssl->state = ssl_connection_complete;
|
---|
793 | conn->recv[sockindex] = mbedtls_recv;
|
---|
794 | conn->send[sockindex] = mbedtls_send;
|
---|
795 | *done = TRUE;
|
---|
796 | }
|
---|
797 | else
|
---|
798 | *done = FALSE;
|
---|
799 |
|
---|
800 | /* Reset our connect state machine */
|
---|
801 | connssl->connecting_state = ssl_connect_1;
|
---|
802 |
|
---|
803 | return CURLE_OK;
|
---|
804 | }
|
---|
805 |
|
---|
806 | CURLcode
|
---|
807 | Curl_mbedtls_connect_nonblocking(struct connectdata *conn,
|
---|
808 | int sockindex,
|
---|
809 | bool *done)
|
---|
810 | {
|
---|
811 | return mbedtls_connect_common(conn, sockindex, TRUE, done);
|
---|
812 | }
|
---|
813 |
|
---|
814 |
|
---|
815 | CURLcode
|
---|
816 | Curl_mbedtls_connect(struct connectdata *conn,
|
---|
817 | int sockindex)
|
---|
818 | {
|
---|
819 | CURLcode retcode;
|
---|
820 | bool done = FALSE;
|
---|
821 |
|
---|
822 | retcode = mbedtls_connect_common(conn, sockindex, FALSE, &done);
|
---|
823 | if(retcode)
|
---|
824 | return retcode;
|
---|
825 |
|
---|
826 | DEBUGASSERT(done);
|
---|
827 |
|
---|
828 | return CURLE_OK;
|
---|
829 | }
|
---|
830 |
|
---|
831 | /*
|
---|
832 | * return 0 error initializing SSL
|
---|
833 | * return 1 SSL initialized successfully
|
---|
834 | */
|
---|
835 | int mbedtls_init(void)
|
---|
836 | {
|
---|
837 | return Curl_polarsslthreadlock_thread_setup();
|
---|
838 | }
|
---|
839 |
|
---|
840 | void mbedtls_cleanup(void)
|
---|
841 | {
|
---|
842 | (void)Curl_polarsslthreadlock_thread_cleanup();
|
---|
843 | }
|
---|
844 |
|
---|
845 | #endif /* USE_MBEDTLS */
|
---|