139 lines
5.9 KiB
C
139 lines
5.9 KiB
C
/*****************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* $Id$
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*
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* Example using a "in core" PEM certificate to retrieve a https page.
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* Written by Theo Borm
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*/
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/* on a netBSD system with OPENSSL& LIBCURL installed from
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* pkgsrc (using default paths) this program can be compiled using:
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* gcc -I/usr/pkg/include -L/usr/pkg/lib -lcurl -Wl,-R/usr/pkg/lib -lssl
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* -lcrypto -lz -o curlcacerttest curlcacerttest.c
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* on other operating systems you may want to change paths to headers
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* and libraries
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*/
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#include <openssl/ssl.h>
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#include <curl/curl.h>
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#include <stdio.h>
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size_t writefunction( void *ptr, size_t size, size_t nmemb, void *stream)
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{
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fwrite(ptr,size,nmemb,stream);
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return(nmemb*size);
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}
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static CURLcode sslctx_function(CURL * curl, void * sslctx, void * parm)
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{
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X509_STORE * store;
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X509 * cert=NULL;
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BIO * bio;
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char * mypem = /* www.cacert.org */
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"-----BEGIN CERTIFICATE-----\n"\
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"MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\
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"IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\
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"IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\
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"Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\
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"BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\
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"MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\
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"ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\
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"CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\
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"8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\
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"zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\
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"fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\
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"w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\
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"G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\
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"epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\
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"laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\
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"QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\
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"fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\
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"YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\
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"ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\
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"gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\
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"MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\
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"IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\
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"dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\
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"czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\
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"dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\
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"aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\
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"AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\
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"b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\
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"ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\
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"nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\
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"18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\
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"gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\
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"Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\
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"sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\
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"SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\
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"CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\
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"GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\
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"zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\
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"omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\
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"-----END CERTIFICATE-----\n";
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/* get a BIO */
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bio=BIO_new_mem_buf(mypem, -1);
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/* use it to read the PEM formatted certificate from memory into an X509
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* structure that SSL can use
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*/
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PEM_read_bio_X509(bio, &cert, 0, NULL);
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if (cert == NULL)
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printf("PEM_read_bio_X509 failed...\n");
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/* get a pointer to the X509 certificate store (which may be empty!) */
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store=SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
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/* add our certificate to this store */
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if (X509_STORE_add_cert(store, cert)==0)
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printf("error adding certificate\n");
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/* all set to go */
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return CURLE_OK ;
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}
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int main(void)
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{
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CURL * ch;
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CURLcode rv;
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rv=curl_global_init(CURL_GLOBAL_ALL);
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ch=curl_easy_init();
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rv=curl_easy_setopt(ch,CURLOPT_VERBOSE, 0);
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rv=curl_easy_setopt(ch,CURLOPT_HEADER, 0);
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rv=curl_easy_setopt(ch,CURLOPT_NOPROGRESS, 1);
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rv=curl_easy_setopt(ch,CURLOPT_NOSIGNAL, 1);
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rv=curl_easy_setopt(ch,CURLOPT_WRITEFUNCTION, *writefunction);
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rv=curl_easy_setopt(ch,CURLOPT_WRITEDATA, stdout);
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rv=curl_easy_setopt(ch,CURLOPT_HEADERFUNCTION, *writefunction);
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rv=curl_easy_setopt(ch,CURLOPT_WRITEHEADER, stderr);
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rv=curl_easy_setopt(ch,CURLOPT_SSLCERTTYPE,"PEM");
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rv=curl_easy_setopt(ch,CURLOPT_SSL_VERIFYPEER,1);
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rv=curl_easy_setopt(ch, CURLOPT_URL, "https://www.cacert.org/");
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/* first try: retrieve page without cacerts' certificate -> will fail
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*/
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rv=curl_easy_perform(ch);
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if (rv==CURLE_OK)
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printf("*** transfer succeeded ***\n");
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else
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printf("*** transfer failed ***\n");
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/* second try: retrieve page using cacerts' certificate -> will succeed
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* load the certificate by installing a function doing the nescessary
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* "modifications" to the SSL CONTEXT just before link init
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*/
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rv=curl_easy_setopt(ch,CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
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rv=curl_easy_perform(ch);
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if (rv==CURLE_OK)
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printf("*** transfer succeeded ***\n");
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else
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printf("*** transfer failed ***\n");
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curl_easy_cleanup(ch);
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curl_global_cleanup();
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}
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