docs/examples/cacertinmem.c

   1 /***************************************************************************
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   7  *
   8  * Copyright (C) 1998 - 2016, 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  * CA cert in memory with OpenSSL to get a HTTPS page.
  24  * </DESC>
  25  */
  26
  27 #include <openssl/ssl.h>
  28 #include <curl/curl.h>
  29 #include <stdio.h>
  30
  31 size_t writefunction( void *ptr, size_t size, size_t nmemb, void *stream)
  32 {
  33   fwrite(ptr, size, nmemb, stream);
  34   return (nmemb*size);
  35 }
  36
  37 static CURLcode sslctx_function(CURL * curl, void * sslctx, void * parm)
  38 {
  39   X509_STORE * store;
  40   X509 * cert=NULL;
  41   BIO * bio;
  42   char * mypem = /* www.cacert.org */
  43     "-----BEGIN CERTIFICATE-----\n"\
  44     "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\
  45     "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\
  46     "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\
  47     "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\
  48     "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\
  49     "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\
  50     "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\
  51     "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\
  52     "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\
  53     "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\
  54     "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\
  55     "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\
  56     "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\
  57     "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\
  58     "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\
  59     "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\
  60     "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\
  61     "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\
  62     "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\
  63     "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\
  64     "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\
  65     "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\
  66     "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\
  67     "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\
  68     "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\
  69     "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\
  70     "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\
  71     "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\
  72     "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\
  73     "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\
  74     "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\
  75     "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\
  76     "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\
  77     "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\
  78     "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\
  79     "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\
  80     "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\
  81     "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\
  82     "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\
  83     "-----END CERTIFICATE-----\n";
  84   /* get a BIO */
  85   bio=BIO_new_mem_buf(mypem, -1);
  86   /* use it to read the PEM formatted certificate from memory into an X509
  87    * structure that SSL can use
  88    */
  89   PEM_read_bio_X509(bio, &cert, 0, NULL);
  90   if(cert == NULL)
  91     printf("PEM_read_bio_X509 failed...\n");
  92
  93   /* get a pointer to the X509 certificate store (which may be empty!) */
  94   store=SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
  95
  96   /* add our certificate to this store */
  97   if(X509_STORE_add_cert(store, cert)==0)
  98     printf("error adding certificate\n");
  99
 100   /* decrease reference counts */
 101   X509_free(cert);
 102   BIO_free(bio);
 103
 104   /* all set to go */
 105   return CURLE_OK;
 106 }
 107
 108 int main(void)
 109 {
 110   CURL * ch;
 111   CURLcode rv;
 112
 113   rv=curl_global_init(CURL_GLOBAL_ALL);
 114   ch=curl_easy_init();
 115   rv=curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
 116   rv=curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
 117   rv=curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
 118   rv=curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
 119   rv=curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, *writefunction);
 120   rv=curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
 121   rv=curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, *writefunction);
 122   rv=curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
 123   rv=curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
 124   rv=curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
 125   rv=curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
 126
 127   /* first try: retrieve page without cacerts' certificate -> will fail
 128    */
 129   rv=curl_easy_perform(ch);
 130   if(rv==CURLE_OK)
 131     printf("*** transfer succeeded ***\n");
 132   else
 133     printf("*** transfer failed ***\n");
 134
 135   /* second try: retrieve page using cacerts' certificate -> will succeed
 136    * load the certificate by installing a function doing the nescessary
 137    * "modifications" to the SSL CONTEXT just before link init
 138    */
 139   rv=curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
 140   rv=curl_easy_perform(ch);
 141   if(rv==CURLE_OK)
 142     printf("*** transfer succeeded ***\n");
 143   else
 144     printf("*** transfer failed ***\n");
 145
 146   curl_easy_cleanup(ch);
 147   curl_global_cleanup();
 148   return rv;
 149 }