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usercertinmem.c 8.9 KB

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  1. /***************************************************************************
  2. * _ _ ____ _
  3. * Project ___| | | | _ \| |
  4. * / __| | | | |_) | |
  5. * | (__| |_| | _ <| |___
  6. * \___|\___/|_| \_\_____|
  7. *
  8. * Copyright (C) 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.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. * SPDX-License-Identifier: curl
  22. *
  23. ***************************************************************************/
  24. /* <DESC>
  25. * Use an in-memory user certificate and RSA key and retrieve an https page.
  26. * </DESC>
  27. */
  28. /* Written by Ishan SinghLevett, based on Theo Borm's cacertinmem.c.
  29. * Note that to maintain simplicity this example does not use a CA certificate
  30. * for peer verification. However, some form of peer verification
  31. * must be used in real circumstances when a secure connection is required.
  32. */
  33. #include <openssl/ssl.h>
  34. #include <openssl/x509.h>
  35. #include <openssl/pem.h>
  36. #include <curl/curl.h>
  37. #include <stdio.h>
  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. static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm)
  44. {
  45. X509 *cert = NULL;
  46. BIO *bio = NULL;
  47. BIO *kbio = NULL;
  48. RSA *rsa = NULL;
  49. int ret;
  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. /* replace the XXX with the actual RSA key */
  93. const char *mykey =
  94. "-----BEGIN RSA PRIVATE KEY-----\n"\
  95. "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\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. "-----END RSA PRIVATE KEY-----\n";
  112. (void)curl; /* avoid warnings */
  113. (void)parm; /* avoid warnings */
  114. /* get a BIO */
  115. bio = BIO_new_mem_buf((char *)mypem, -1);
  116. if(!bio) {
  117. printf("BIO_new_mem_buf failed\n");
  118. }
  119. /* use it to read the PEM formatted certificate from memory into an X509
  120. * structure that SSL can use
  121. */
  122. cert = PEM_read_bio_X509(bio, NULL, 0, NULL);
  123. if(!cert) {
  124. printf("PEM_read_bio_X509 failed...\n");
  125. }
  126. /* tell SSL to use the X509 certificate */
  127. ret = SSL_CTX_use_certificate((SSL_CTX*)sslctx, cert);
  128. if(ret != 1) {
  129. printf("Use certificate failed\n");
  130. }
  131. /* create a bio for the RSA key */
  132. kbio = BIO_new_mem_buf((char *)mykey, -1);
  133. if(!kbio) {
  134. printf("BIO_new_mem_buf failed\n");
  135. }
  136. /* read the key bio into an RSA object */
  137. rsa = PEM_read_bio_RSAPrivateKey(kbio, NULL, 0, NULL);
  138. if(!rsa) {
  139. printf("Failed to create key bio\n");
  140. }
  141. /* tell SSL to use the RSA key from memory */
  142. ret = SSL_CTX_use_RSAPrivateKey((SSL_CTX*)sslctx, rsa);
  143. if(ret != 1) {
  144. printf("Use Key failed\n");
  145. }
  146. /* free resources that have been allocated by openssl functions */
  147. if(bio)
  148. BIO_free(bio);
  149. if(kbio)
  150. BIO_free(kbio);
  151. if(rsa)
  152. RSA_free(rsa);
  153. if(cert)
  154. X509_free(cert);
  155. /* all set to go */
  156. return CURLE_OK;
  157. }
  158. int main(void)
  159. {
  160. CURL *ch;
  161. CURLcode rv;
  162. curl_global_init(CURL_GLOBAL_ALL);
  163. ch = curl_easy_init();
  164. curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
  165. curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
  166. curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
  167. curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
  168. curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
  169. curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
  170. curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
  171. curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
  172. curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
  173. /* both VERIFYPEER and VERIFYHOST are set to 0 in this case because there is
  174. no CA certificate */
  175. curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L);
  176. curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L);
  177. curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
  178. curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM");
  179. /* first try: retrieve page without user certificate and key -> fails */
  180. rv = curl_easy_perform(ch);
  181. if(rv == CURLE_OK) {
  182. printf("*** transfer succeeded ***\n");
  183. }
  184. else {
  185. printf("*** transfer failed ***\n");
  186. }
  187. /* second try: retrieve page using user certificate and key -> succeeds
  188. * load the certificate and key by installing a function doing the necessary
  189. * "modifications" to the SSL CONTEXT just before link init
  190. */
  191. curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, sslctx_function);
  192. rv = curl_easy_perform(ch);
  193. if(rv == CURLE_OK) {
  194. printf("*** transfer succeeded ***\n");
  195. }
  196. else {
  197. printf("*** transfer failed ***\n");
  198. }
  199. curl_easy_cleanup(ch);
  200. curl_global_cleanup();
  201. return rv;
  202. }