Annotation of embedaddon/curl/docs/examples/usercertinmem.c, revision 1.1
1.1 ! misho 1: /***************************************************************************
! 2: * _ _ ____ _
! 3: * Project ___| | | | _ \| |
! 4: * / __| | | | |_) | |
! 5: * | (__| |_| | _ <| |___
! 6: * \___|\___/|_| \_\_____|
! 7: *
! 8: * Copyright (C) 2013 - 2019, 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: curl_global_init(CURL_GLOBAL_ALL);
! 181: ch = curl_easy_init();
! 182: curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
! 183: curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
! 184: curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
! 185: curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
! 186: curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
! 187: curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
! 188: curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
! 189: curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
! 190: 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: curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L);
! 196: curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L);
! 197: curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
! 198: 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: 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: }
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