1 | /*
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2 | * Adapted from:
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3 | *
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4 | * client.c
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5 | *
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6 | * Copyright (C) 2006-2015 wolfSSL Inc.
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7 | *
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8 | * This file is part of wolfSSL. (formerly known as CyaSSL)
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9 | *
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10 | * wolfSSL is free software; you can redistribute it and/or modify
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11 | * it under the terms of the GNU General Public License as published by
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12 | * the Free Software Foundation; either version 2 of the License, or
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13 | * (at your option) any later version.
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14 | *
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15 | * wolfSSL is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | * GNU General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU General Public License
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21 | * along with this program; if not, write to the Free Software
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22 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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23 | */
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24 | #include <stdlib.h>
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25 | #include <unistd.h>
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26 | #include <stdarg.h>
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27 | #include <string.h>
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28 | #include <errno.h>
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29 | #include <fcntl.h>
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30 | #include <stdio.h>
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31 | #include <time.h>
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32 | #include <poll.h>
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33 | #include <sys/socket.h>
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34 |
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35 | #include <wolfssl/wolfcrypt/types.h>
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36 | #include <wolfssl/ssl.h>
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37 |
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38 | #if 0
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39 | # define dbg(...) say(__VA_ARGS__)
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40 | #else
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41 | # define dbg(...) ((void)0)
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42 | #endif
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43 |
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44 | static ssize_t safe_write(int fd, const void *buf, size_t count)
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45 | {
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46 | ssize_t n;
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47 |
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48 | do {
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49 | n = write(fd, buf, count);
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50 | } while (n < 0 && errno == EINTR);
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51 |
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52 | return n;
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53 | }
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54 |
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55 | static ssize_t full_write(int fd, const void *buf, size_t len)
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56 | {
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57 | ssize_t cc;
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58 | ssize_t total;
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59 |
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60 | total = 0;
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61 |
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62 | while (len) {
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63 | cc = safe_write(fd, buf, len);
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64 |
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65 | if (cc < 0) {
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66 | if (total) {
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67 | /* we already wrote some! */
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68 | /* user can do another write to know the error code */
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69 | return total;
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70 | }
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71 | return cc; /* write() returns -1 on failure. */
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72 | }
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73 |
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74 | total += cc;
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75 | buf = ((const char *)buf) + cc;
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76 | len -= cc;
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77 | }
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78 |
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79 | return total;
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80 | }
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81 |
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82 | static void say(const char *s, ...)
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83 | {
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84 | char buf[256];
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85 | va_list p;
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86 | int sz;
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87 |
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88 | va_start(p, s);
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89 | sz = vsnprintf(buf, sizeof(buf), s, p);
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90 | full_write(STDERR_FILENO, buf, sz >= 0 && sz < sizeof(buf) ? sz : strlen(buf));
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91 | va_end(p);
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92 | }
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93 |
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94 | static void die(const char *s, ...)
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95 | {
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96 | char buf[256];
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97 | va_list p;
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98 | int sz;
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99 |
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100 | va_start(p, s);
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101 | sz = vsnprintf(buf, sizeof(buf), s, p);
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102 | full_write(STDERR_FILENO, buf, sz >= 0 && sz < sizeof(buf) ? sz : strlen(buf));
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103 | exit(1);
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104 | va_end(p);
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105 | }
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106 |
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107 | static void err_sys(const char *msg)
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108 | {
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109 | die("%s\n", msg);
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110 | }
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111 |
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112 | /* ==== */
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113 |
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114 | #if 0
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115 | static void showPeer(WOLFSSL* ssl)
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116 | {
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117 | WOLFSSL_CIPHER* cipher;
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118 | WOLFSSL_X509* peer = wolfSSL_get_peer_certificate(ssl);
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119 | if (peer)
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120 | ShowX509(peer, "peer's cert info:");
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121 | else
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122 | say("peer has no cert!\n");
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123 | say("SSL version is %s\n", wolfSSL_get_version(ssl));
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124 |
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125 | cipher = wolfSSL_get_current_cipher(ssl);
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126 | say("SSL cipher suite is %s\n", wolfSSL_CIPHER_get_name(cipher));
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127 |
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128 | {
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129 | WOLFSSL_X509_CHAIN* chain = wolfSSL_get_peer_chain(ssl);
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130 | int count = wolfSSL_get_chain_count(chain);
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131 | int i;
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132 |
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133 | for (i = 0; i < count; i++) {
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134 | int length;
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135 | unsigned char buffer[3072];
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136 | WOLFSSL_X509* chainX509;
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137 |
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138 | wolfSSL_get_chain_cert_pem(chain, i, buffer, sizeof(buffer), &length);
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139 | buffer[length] = 0;
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140 | say("cert %d has length %d data = \n%s\n", i, length, buffer);
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141 |
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142 | chainX509 = wolfSSL_get_chain_X509(chain, i);
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143 | if (chainX509)
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144 | ShowX509(chainX509, "session cert info:");
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145 | else
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146 | say("get_chain_X509 failed\n");
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147 | wolfSSL_FreeX509(chainX509);
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148 | }
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149 | }
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150 | }
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151 | #endif
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152 |
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153 | WOLFSSL *prepare(int sockfd)
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154 | {
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155 | WOLFSSL_METHOD* method;
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156 | WOLFSSL_CTX* ctx;
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157 | WOLFSSL* ssl;
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158 |
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159 | wolfSSL_Init();
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160 |
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161 | method = wolfTLSv1_1_client_method();
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162 | if (method == NULL)
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163 | err_sys("out of memory");
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164 | ctx = wolfSSL_CTX_new(method);
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165 | if (ctx == NULL)
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166 | err_sys("out of memory");
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167 | // if (cipherList)
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168 | // if (wolfSSL_CTX_set_cipher_list(ctx, cipherList) != SSL_SUCCESS)
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169 | // err_sys("client can't set cipher list 1");
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170 |
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171 | // if (fewerPackets)
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172 | // wolfSSL_CTX_set_group_messages(ctx);
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173 |
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174 | //#ifndef NO_DH
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175 | // wolfSSL_CTX_SetMinDhKey_Sz(ctx, (word16)minDhKeyBits);
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176 | //#endif
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177 |
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178 | // if (usePsk) {
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179 | // wolfSSL_CTX_set_psk_client_callback(ctx, my_psk_client_cb);
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180 | // if (cipherList == NULL) {
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181 | // const char *defaultCipherList;
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182 | //#if defined(HAVE_AESGCM) && !defined(NO_DH)
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183 | // defaultCipherList = "DHE-PSK-AES128-GCM-SHA256";
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184 | //#elif defined(HAVE_NULL_CIPHER)
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185 | // defaultCipherList = "PSK-NULL-SHA256";
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186 | //#else
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187 | // defaultCipherList = "PSK-AES128-CBC-SHA256";
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188 | //#endif
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189 | // if (wolfSSL_CTX_set_cipher_list(ctx,defaultCipherList) != SSL_SUCCESS)
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190 | // err_sys("client can't set cipher list 2");
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191 | // }
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192 | // useClientCert = 0;
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193 | // }
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194 |
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195 | // if (useAnon) {
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196 | // if (cipherList == NULL) {
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197 | // wolfSSL_CTX_allow_anon_cipher(ctx);
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198 | // if (wolfSSL_CTX_set_cipher_list(ctx,"ADH-AES128-SHA") != SSL_SUCCESS)
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199 | // err_sys("client can't set cipher list 4");
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200 | // }
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201 | // useClientCert = 0;
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202 | // }
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203 |
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204 | //#if defined(OPENSSL_EXTRA) || defined(HAVE_WEBSERVER)
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205 | // wolfSSL_CTX_set_default_passwd_cb(ctx, PasswordCallBack);
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206 | //#endif
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207 |
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208 | // if (useOcsp) {
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209 | // if (ocspUrl != NULL) {
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210 | // wolfSSL_CTX_SetOCSP_OverrideURL(ctx, ocspUrl);
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211 | // wolfSSL_CTX_EnableOCSP(ctx, WOLFSSL_OCSP_NO_NONCE
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212 | // | WOLFSSL_OCSP_URL_OVERRIDE);
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213 | // }
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214 | // else
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215 | // wolfSSL_CTX_EnableOCSP(ctx, WOLFSSL_OCSP_NO_NONCE);
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216 | // }
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217 | //
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218 | //#ifdef USER_CA_CB
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219 | // wolfSSL_CTX_SetCACb(ctx, CaCb);
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220 | //#endif
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221 | //
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222 | //#ifdef VERIFY_CALLBACK
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223 | // wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, myVerify);
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224 | //#endif
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225 | //#if !defined(NO_FILESYSTEM) && !defined(NO_CERTS)
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226 | // if (useClientCert) {
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227 | // if (wolfSSL_CTX_use_certificate_chain_file(ctx, ourCert) != SSL_SUCCESS)
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228 | // err_sys("can't load client cert file, check file and run from"
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229 | // " wolfSSL home dir");
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230 | // if (wolfSSL_CTX_use_PrivateKey_file(ctx, ourKey, SSL_FILETYPE_PEM) != SSL_SUCCESS)
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231 | // err_sys("can't load client private key file, check file and run "
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232 | // "from wolfSSL home dir");
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233 | // }
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234 | //
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235 | // if (!usePsk && !useAnon) {
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236 | // if (wolfSSL_CTX_load_verify_locations(ctx, verifyCert,0) != SSL_SUCCESS)
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237 | // err_sys("can't load ca file, Please run from wolfSSL home dir");
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238 | //#ifdef HAVE_ECC
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239 | // /* load ecc verify too, echoserver uses it by default w/ ecc */
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240 | // if (wolfSSL_CTX_load_verify_locations(ctx, eccCert, 0) != SSL_SUCCESS)
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241 | // err_sys("can't load ecc ca file, Please run from wolfSSL home dir");
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242 | //#endif
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243 | // }
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244 | //#endif /* !NO_FILESYSTEM && !NO_CERTS */
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245 |
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246 | //#if !defined(NO_CERTS)
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247 | // if (!usePsk && !useAnon && doPeerCheck == 0)
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248 | // wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
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249 | // if (!usePsk && !useAnon && overrideDateErrors == 1)
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250 | // wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_PEER, myDateCb);
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251 | //#endif
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252 |
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253 | wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
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254 |
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255 | //#ifdef HAVE_SNI
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256 | // if (sniHostName)
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257 | // if (wolfSSL_CTX_UseSNI(ctx, 0, sniHostName, XSTRLEN(sniHostName)) != SSL_SUCCESS)
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258 | // err_sys("UseSNI failed");
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259 | //#endif
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260 |
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261 | //#ifdef HAVE_MAX_FRAGMENT
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262 | // if (maxFragment)
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263 | // if (wolfSSL_CTX_UseMaxFragment(ctx, maxFragment) != SSL_SUCCESS)
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264 | // err_sys("UseMaxFragment failed");
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265 | //#endif
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266 | //#ifdef HAVE_TRUNCATED_HMAC
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267 | // if (truncatedHMAC)
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268 | // if (wolfSSL_CTX_UseTruncatedHMAC(ctx) != SSL_SUCCESS)
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269 | // err_sys("UseTruncatedHMAC failed");
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270 | //#endif
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271 | //#ifdef HAVE_SESSION_TICKET
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272 | // if (wolfSSL_CTX_UseSessionTicket(ctx) != SSL_SUCCESS)
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273 | // err_sys("UseSessionTicket failed");
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274 | //#endif
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275 |
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276 | //#if defined(WOLFSSL_MDK_ARM)
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277 | // wolfSSL_CTX_set_verify(ctx, SSL_VERIFY_NONE, 0);
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278 | //#endif
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279 |
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280 | ssl = wolfSSL_new(ctx);
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281 | if (ssl == NULL)
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282 | err_sys("out of memory");
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283 |
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284 | //#ifdef HAVE_SESSION_TICKET
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285 | // wolfSSL_set_SessionTicket_cb(ssl, sessionTicketCB, (void*)"initial session");
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286 | //#endif
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287 |
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288 | // if (doDTLS) {
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289 | // SOCKADDR_IN_T addr;
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290 | // build_addr(&addr, host, port, 1);
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291 | // wolfSSL_dtls_set_peer(ssl, &addr, sizeof(addr));
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292 | // tcp_socket(&sockfd, 1);
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293 | // } wlse {
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294 | // tcp_connect(&sockfd, host, port, 0);
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295 | // }
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296 |
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297 | //#ifdef HAVE_POLY1305
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298 | // /* use old poly to connect with google server */
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299 | // if (!XSTRNCMP(domain, "www.google.com", 14)) {
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300 | // if (wolfSSL_use_old_poly(ssl, 1) != 0)
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301 | // err_sys("unable to set to old poly");
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302 | // }
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303 | //#endif
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304 |
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305 | wolfSSL_set_fd(ssl, sockfd);
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306 |
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307 | //#ifdef HAVE_CRL
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308 | // if (disableCRL == 0) {
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309 | // if (wolfSSL_EnableCRL(ssl, WOLFSSL_CRL_CHECKALL) != SSL_SUCCESS)
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310 | // err_sys("can't enable crl check");
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311 | // if (wolfSSL_LoadCRL(ssl, crlPemDir, SSL_FILETYPE_PEM, 0) != SSL_SUCCESS)
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312 | // err_sys("can't load crl, check crlfile and date validity");
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313 | // if (wolfSSL_SetCRL_Cb(ssl, CRL_CallBack) != SSL_SUCCESS)
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314 | // err_sys("can't set crl callback");
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315 | // }
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316 | //#endif
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317 | //#ifdef HAVE_SECURE_RENEGOTIATION
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318 | // if (scr) {
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319 | // if (wolfSSL_UseSecureRenegotiation(ssl) != SSL_SUCCESS)
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320 | // err_sys("can't enable secure renegotiation");
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321 | // }
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322 | //#endif
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323 | //#ifdef ATOMIC_USER
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324 | // if (atomicUser)
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325 | // SetupAtomicUser(ctx, ssl);
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326 | //#endif
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327 | //#ifdef HAVE_PK_CALLBACKS
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328 | // if (pkCallbacks)
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329 | // SetupPkCallbacks(ctx, ssl);
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330 | //#endif
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331 | // if (matchName && doPeerCheck)
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332 | // wolfSSL_check_domain_name(ssl, domain);
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333 |
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334 | if (wolfSSL_connect(ssl) != SSL_SUCCESS) {
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335 | // /* see note at top of README */
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336 | // int err = wolfSSL_get_error(ssl, 0);
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337 | // char buffer[WOLFSSL_MAX_ERROR_SZ];
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338 | // say("err = %d, %s\n", err,
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339 | // wolfSSL_ERR_error_string(err, buffer));
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340 | err_sys("SSL_connect failed");
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341 | }
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342 | // showPeer(ssl);
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343 |
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344 | //#ifdef HAVE_SECURE_RENEGOTIATION
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345 | // if (scr && forceScr) {
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346 | // if (wolfSSL_Rehandshake(ssl) != SSL_SUCCESS) {
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347 | // int err = wolfSSL_get_error(ssl, 0);
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348 | // char buffer[WOLFSSL_MAX_ERROR_SZ];
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349 | // say("err = %d, %s\n", err,
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350 | // wolfSSL_ERR_error_string(err, buffer));
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351 | // err_sys("wolfSSL_Rehandshake failed");
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352 | // }
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353 | // }
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354 | //#endif
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355 |
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356 | return ssl;
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357 | }
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358 |
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359 | static struct pollfd pfd[2] = {
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360 | { -1, POLLIN|POLLERR|POLLHUP, 0 },
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361 | { -1, POLLIN|POLLERR|POLLHUP, 0 },
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362 | };
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363 | #define STDIN pfd[0]
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364 | #define NETWORK pfd[1]
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365 | #define STDIN_READY() (pfd[0].revents & (POLLIN|POLLERR|POLLHUP))
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366 | #define NETWORK_READY() (pfd[1].revents & (POLLIN|POLLERR|POLLHUP))
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367 |
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368 | static void wait_for_input(void)
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369 | {
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370 | if (STDIN.fd == NETWORK.fd) /* means both are -1 */
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371 | exit(0);
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372 | dbg("polling\n");
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373 | STDIN.revents = NETWORK.revents = 0;
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374 | while (poll(pfd, 2, -1) < 0 && errno == EINTR)
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375 | continue;
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376 | }
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377 |
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378 | static void do_io_until_eof_and_exit(WOLFSSL *ssl, int fd)
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379 | {
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380 | int len;
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381 | char ibuf[4 * 1024];
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382 |
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383 | NETWORK.fd = fd;
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384 | STDIN.fd = 0;
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385 |
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386 | len = 0; /* only to suppress compiler warning */
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387 | for (;;) {
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388 | wait_for_input();
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389 |
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390 | if (STDIN_READY()) {
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391 | dbg("reading stdin\n");
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392 | len = read(STDIN_FILENO, ibuf, sizeof(ibuf));
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393 | if (len < 0)
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394 | die("read error on stdin\n");
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395 | if (len == 0) {
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396 | dbg("read len = 0, stdin not polled anymore\n");
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397 | STDIN.fd = -1;
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398 | } else {
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399 | int n = wolfSSL_write(ssl, ibuf, len);
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400 | if (n != len)
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401 | die("SSL_write(%d) failed (returned %d)\n", len, n);
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402 | }
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403 | }
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404 |
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405 | if (NETWORK_READY()) {
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406 | dbg("%s%s%s\n",
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407 | (pfd[1].revents & POLLIN) ? "POLLIN" : "",
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408 | (pfd[1].revents & POLLERR) ? "|POLLERR" : "",
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409 | (pfd[1].revents & POLLHUP) ? "|POLLHUP" : ""
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410 | );
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411 | /* We are using blocking socket here.
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412 | * (Nonblocking socket would complicate writing to it).
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413 | * Therefore, SSL_read _can block_ here.
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414 | * This is not what wget expects (it wants to see short reads).
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415 | * Therefore, we use smallish buffer here, to approximate that.
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416 | */
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417 | len = wolfSSL_read(ssl, ibuf,
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418 | sizeof(ibuf) < 1024 ? sizeof(ibuf) : 1024
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419 | );
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420 | if (len < 0)
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421 | die("SSL_read error on network (%d)\n", len);
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422 | if (len > 0) {
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423 | int n;
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424 | n = full_write(STDOUT_FILENO, ibuf, len);
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425 | if (n != len)
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426 | die("write(%d) to stdout returned %d\n", len, n);
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427 | continue;
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428 | }
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429 | /* Blocking reads are easier wtr EOF detection (no EAGAIN error to check for) */
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430 | dbg("read len = 0, network not polled anymore\n");
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431 | NETWORK.fd = -1;
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432 | /* saw EOF on network, and we processed
|
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433 | * and wrote out all ssl data. Signal it:
|
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434 | */
|
---|
435 | close(STDOUT_FILENO);
|
---|
436 | }
|
---|
437 | }
|
---|
438 | }
|
---|
439 |
|
---|
440 | int main(int argc, char **argv)
|
---|
441 | {
|
---|
442 | WOLFSSL *ssl;
|
---|
443 | int fd;
|
---|
444 | char *fd_str;
|
---|
445 |
|
---|
446 | if (!argv[1])
|
---|
447 | die("Syntax error\n");
|
---|
448 | if (argv[1][0] != '-')
|
---|
449 | die("Syntax error\n");
|
---|
450 | if (argv[1][1] != 'd')
|
---|
451 | die("Syntax error\n");
|
---|
452 | fd_str = argv[1] + 2;
|
---|
453 | if (!fd_str[0])
|
---|
454 | fd_str = argv[2];
|
---|
455 | if (!fd_str || fd_str[0] < '0' || fd_str[0] > '9')
|
---|
456 | die("Syntax error\n");
|
---|
457 |
|
---|
458 | fd = atoi(fd_str);
|
---|
459 | if (fd < 3)
|
---|
460 | die("Syntax error\n");
|
---|
461 |
|
---|
462 | ssl = prepare(fd);
|
---|
463 | do_io_until_eof_and_exit(ssl, fd);
|
---|
464 | /* does not return */
|
---|
465 |
|
---|
466 | // if (doDTLS == 0) { /* don't send alert after "break" command */
|
---|
467 | // ret = wolfSSL_shutdown(ssl);
|
---|
468 | // if (wc_shutdown && ret == SSL_SHUTDOWN_NOT_DONE)
|
---|
469 | // wolfSSL_shutdown(ssl); /* bidirectional shutdown */
|
---|
470 | // }
|
---|
471 | //#ifdef ATOMIC_USER
|
---|
472 | // if (atomicUser)
|
---|
473 | // FreeAtomicUser(ssl);
|
---|
474 | //#endif
|
---|
475 | // wolfSSL_free(ssl);
|
---|
476 | // CloseSocket(sockfd);
|
---|
477 | // wolfSSL_CTX_free(ctx);
|
---|
478 |
|
---|
479 | return 0;
|
---|
480 | }
|
---|