1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 2013 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 /* <DESC> 23 * Use an in-memory user certificate and RSA key and retrieve an https page. 24 * </DESC> 25 */ 26 /* Written by Ishan SinghLevett, based on Theo Borm's cacertinmem.c. 27 * Note that to maintain simplicity this example does not use a CA certificate 28 * for peer verification. However, some form of peer verification 29 * must be used in real circumstances when a secure connection is required. 30 */ 31 32 #include <openssl/ssl.h> 33 #include <openssl/x509.h> 34 #include <openssl/pem.h> 35 #include <curl/curl.h> 36 #include <stdio.h> 37 38 static size_t writefunction(void *ptr, size_t size, size_t nmemb, void *stream) 39 { 40 fwrite(ptr, size, nmemb, stream); 41 return (nmemb*size); 42 } 43 44 static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm) 45 { 46 X509 *cert = NULL; 47 BIO *bio = NULL; 48 BIO *kbio = NULL; 49 RSA *rsa = NULL; 50 int ret; 51 52 const char *mypem = /* www.cacert.org */ 53 "-----BEGIN CERTIFICATE-----\n"\ 54 "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\ 55 "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\ 56 "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\ 57 "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\ 58 "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\ 59 "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\ 60 "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\ 61 "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\ 62 "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\ 63 "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\ 64 "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\ 65 "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\ 66 "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\ 67 "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\ 68 "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\ 69 "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\ 70 "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\ 71 "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\ 72 "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\ 73 "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\ 74 "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\ 75 "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\ 76 "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\ 77 "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\ 78 "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\ 79 "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\ 80 "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\ 81 "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\ 82 "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\ 83 "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\ 84 "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\ 85 "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\ 86 "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\ 87 "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\ 88 "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\ 89 "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\ 90 "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\ 91 "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\ 92 "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\ 93 "-----END CERTIFICATE-----\n"; 94 95 /*replace the XXX with the actual RSA key*/ 96 const char *mykey = 97 "-----BEGIN RSA PRIVATE KEY-----\n"\ 98 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 99 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 100 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 101 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 102 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 103 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 104 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 105 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 106 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 107 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 108 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 109 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 110 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 111 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 112 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 113 "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\ 114 "-----END RSA PRIVATE KEY-----\n"; 115 116 (void)curl; /* avoid warnings */ 117 (void)parm; /* avoid warnings */ 118 119 /* get a BIO */ 120 bio = BIO_new_mem_buf((char *)mypem, -1); 121 122 if(bio == NULL) { 123 printf("BIO_new_mem_buf failed\n"); 124 } 125 126 /* use it to read the PEM formatted certificate from memory into an X509 127 * structure that SSL can use 128 */ 129 cert = PEM_read_bio_X509(bio, NULL, 0, NULL); 130 if(cert == NULL) { 131 printf("PEM_read_bio_X509 failed...\n"); 132 } 133 134 /*tell SSL to use the X509 certificate*/ 135 ret = SSL_CTX_use_certificate((SSL_CTX*)sslctx, cert); 136 if(ret != 1) { 137 printf("Use certificate failed\n"); 138 } 139 140 /*create a bio for the RSA key*/ 141 kbio = BIO_new_mem_buf((char *)mykey, -1); 142 if(kbio == NULL) { 143 printf("BIO_new_mem_buf failed\n"); 144 } 145 146 /*read the key bio into an RSA object*/ 147 rsa = PEM_read_bio_RSAPrivateKey(kbio, NULL, 0, NULL); 148 if(rsa == NULL) { 149 printf("Failed to create key bio\n"); 150 } 151 152 /*tell SSL to use the RSA key from memory*/ 153 ret = SSL_CTX_use_RSAPrivateKey((SSL_CTX*)sslctx, rsa); 154 if(ret != 1) { 155 printf("Use Key failed\n"); 156 } 157 158 /* free resources that have been allocated by openssl functions */ 159 if(bio) 160 BIO_free(bio); 161 162 if(kbio) 163 BIO_free(kbio); 164 165 if(rsa) 166 RSA_free(rsa); 167 168 if(cert) 169 X509_free(cert); 170 171 /* all set to go */ 172 return CURLE_OK; 173 } 174 175 int main(void) 176 { 177 CURL *ch; 178 CURLcode rv; 179 180 rv = curl_global_init(CURL_GLOBAL_ALL); 181 ch = curl_easy_init(); 182 rv = curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L); 183 rv = curl_easy_setopt(ch, CURLOPT_HEADER, 0L); 184 rv = curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L); 185 rv = curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L); 186 rv = curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction); 187 rv = curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout); 188 rv = curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction); 189 rv = curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr); 190 rv = curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM"); 191 192 /* both VERIFYPEER and VERIFYHOST are set to 0 in this case because there is 193 no CA certificate*/ 194 195 rv = curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L); 196 rv = curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L); 197 rv = curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/"); 198 rv = curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM"); 199 200 /* first try: retrieve page without user certificate and key -> will fail 201 */ 202 rv = curl_easy_perform(ch); 203 if(rv == CURLE_OK) { 204 printf("*** transfer succeeded ***\n"); 205 } 206 else { 207 printf("*** transfer failed ***\n"); 208 } 209 210 /* second try: retrieve page using user certificate and key -> will succeed 211 * load the certificate and key by installing a function doing the necessary 212 * "modifications" to the SSL CONTEXT just before link init 213 */ 214 rv = curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function); 215 rv = curl_easy_perform(ch); 216 if(rv == CURLE_OK) { 217 printf("*** transfer succeeded ***\n"); 218 } 219 else { 220 printf("*** transfer failed ***\n"); 221 } 222 223 curl_easy_cleanup(ch); 224 curl_global_cleanup(); 225 return rv; 226 } 227