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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
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      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) 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 }
    150