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Diffstat (limited to 'docs/examples/cacertinmem.c')
| -rw-r--r-- | docs/examples/cacertinmem.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/docs/examples/cacertinmem.c b/docs/examples/cacertinmem.c new file mode 100644 index 000000000..de5e3248e --- /dev/null +++ b/docs/examples/cacertinmem.c @@ -0,0 +1,138 @@ +/***************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * $Id$ + * + * Example using a "in core" PEM certificate to retrieve a https page. + * Written by Theo Borm + */ + +/* on a netBSD system with OPENSSL& LIBCURL installed from + * pkgsrc (using default paths) this program can be compiled using: + * gcc -I/usr/pkg/include -L/usr/pkg/lib -lcurl -Wl,-R/usr/pkg/lib -lssl + * -lcrypto -lz -o curlcacerttest curlcacerttest.c + * on other operating systems you may want to change paths to headers + * and libraries +*/ +#include <openssl/ssl.h> +#include <curl/curl.h> +#include <stdio.h> + +size_t writefunction( void *ptr, size_t size, size_t nmemb, void *stream) +{ + fwrite(ptr,size,nmemb,stream); + return(nmemb*size); +} + +static CURLcode sslctx_function(CURL * curl, void * sslctx, void * parm) +{ + X509_STORE * store; + X509 * cert=NULL; + BIO * bio; + char * mypem = /* www.cacert.org */ + "-----BEGIN CERTIFICATE-----\n"\ + "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\ + "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\ + "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\ + "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\ + "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\ + "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\ + "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\ + "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\ + "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\ + "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\ + "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\ + "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\ + "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\ + "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\ + "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\ + "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\ + "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\ + "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\ + "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\ + "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\ + "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\ + "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\ + "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\ + "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\ + "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\ + "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\ + "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\ + "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\ + "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\ + "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\ + "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\ + "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\ + "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\ + "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\ + "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\ + "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\ + "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\ + "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\ + "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\ + "-----END CERTIFICATE-----\n"; + /* get a BIO */ + bio=BIO_new_mem_buf(mypem, -1); + /* use it to read the PEM formatted certificate from memory into an X509 + * structure that SSL can use + */ + PEM_read_bio_X509(bio, &cert, 0, NULL); + if (cert == NULL) + printf("PEM_read_bio_X509 failed...\n"); + + /* get a pointer to the X509 certificate store (which may be empty!) */ + store=SSL_CTX_get_cert_store((SSL_CTX *)sslctx); + + /* add our certificate to this store */ + if (X509_STORE_add_cert(store, cert)==0) + printf("error adding certificate\n"); + + /* all set to go */ + return CURLE_OK ; +} + +int main(void) +{ + CURL * ch; + CURLcode rv; + + rv=curl_global_init(CURL_GLOBAL_ALL); + ch=curl_easy_init(); + rv=curl_easy_setopt(ch,CURLOPT_VERBOSE, 0); + rv=curl_easy_setopt(ch,CURLOPT_HEADER, 0); + rv=curl_easy_setopt(ch,CURLOPT_NOPROGRESS, 1); + rv=curl_easy_setopt(ch,CURLOPT_NOSIGNAL, 1); + rv=curl_easy_setopt(ch,CURLOPT_WRITEFUNCTION, *writefunction); + rv=curl_easy_setopt(ch,CURLOPT_WRITEDATA, stdout); + rv=curl_easy_setopt(ch,CURLOPT_HEADERFUNCTION, *writefunction); + rv=curl_easy_setopt(ch,CURLOPT_WRITEHEADER, stderr); + rv=curl_easy_setopt(ch,CURLOPT_SSLCERTTYPE,"PEM"); + rv=curl_easy_setopt(ch,CURLOPT_SSL_VERIFYPEER,1); + rv=curl_easy_setopt(ch, CURLOPT_URL, "https://www.cacert.org/"); + + /* first try: retrieve page without cacerts' certificate -> will fail + */ + rv=curl_easy_perform(ch); + if (rv==CURLE_OK) + printf("*** transfer succeeded ***\n"); + else + printf("*** transfer failed ***\n"); + + /* second try: retrieve page using cacerts' certificate -> will succeed + * load the certificate by installing a function doing the nescessary + * "modifications" to the SSL CONTEXT just before link init + */ + rv=curl_easy_setopt(ch,CURLOPT_SSL_CTX_FUNCTION, *sslctx_function); + rv=curl_easy_perform(ch); + if (rv==CURLE_OK) + printf("*** transfer succeeded ***\n"); + else + printf("*** transfer failed ***\n"); + + curl_easy_cleanup(ch); + curl_global_cleanup(); +} |