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