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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
/* <DESC>
* CA cert in memory with OpenSSL to get an HTTPS page.
* </DESC>
*/
/* Requires: USE_OPENSSL */
#include <openssl/ssl.h>
#include <stdio.h>
#include <curl/curl.h>
#if defined(__GNUC__) || defined(__clang__)
#pragma GCC diagnostic ignored "-Woverlength-strings"
#endif
/* Silence warning when calling sk_X509_INFO_pop_free() */
#if defined(__clang__) && __clang_major__ >= 16
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcast-function-type-strict"
#endif
#if defined(OPENSSL_IS_BORINGSSL) || defined(OPENSSL_IS_AWSLC)
typedef size_t ossl_valsize_t;
#else
typedef int ossl_valsize_t;
#endif
static size_t write_cb(void *ptr, size_t size, size_t nmemb, void *stream)
{
fwrite(ptr, size, nmemb, (FILE *)stream);
return nmemb * size;
}
static CURLcode sslctx_function(CURL *curl, void *sslctx, void *pointer)
{
/** This example uses two (fake) certificates **/
/* replace the XXX with the actual CA certificates */
static const char mypem[] =
"-----BEGIN CERTIFICATE-----\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"-----END CERTIFICATE-----\n"
"-----BEGIN CERTIFICATE-----\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"
"-----END CERTIFICATE-----\n";
CURLcode result = CURLE_ABORTED_BY_CALLBACK;
BIO *cbio = NULL;
X509_STORE *cts;
ossl_valsize_t i;
STACK_OF(X509_INFO) * inf;
(void)curl;
(void)pointer;
cts = SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
if(!cts) {
printf("SSL_CTX_get_cert_store() failed\n");
goto out;
}
cbio = BIO_new_mem_buf(mypem, sizeof(mypem) - 1);
if(!cbio) {
printf("BIO_new_mem_buf() failed\n");
goto out;
}
inf = PEM_X509_INFO_read_bio(cbio, NULL, NULL, NULL);
if(!inf) {
printf("PEM_X509_INFO_read_bio() failed\n");
goto out;
}
for(i = 0; i < sk_X509_INFO_num(inf); i++) {
X509_INFO *itmp = sk_X509_INFO_value(inf, i);
if(itmp->x509) {
X509_STORE_add_cert(cts, itmp->x509);
}
if(itmp->crl) {
X509_STORE_add_crl(cts, itmp->crl);
}
}
sk_X509_INFO_pop_free(inf, X509_INFO_free);
result = CURLE_OK;
out:
if(cbio)
BIO_free(cbio);
return result;
}
int main(void)
{
CURL *curl;
CURLcode result = curl_global_init(CURL_GLOBAL_ALL);
if(result != CURLE_OK)
return (int)result;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_VERBOSE, 0L);
curl_easy_setopt(curl, CURLOPT_HEADER, 0L);
curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1L);
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1L);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_cb);
curl_easy_setopt(curl, CURLOPT_WRITEDATA, stdout);
curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, write_cb);
curl_easy_setopt(curl, CURLOPT_HEADERDATA, stderr);
curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, "PEM");
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 1L);
curl_easy_setopt(curl, CURLOPT_URL, "https://www.example.com/");
/* Turn off the default CA locations, otherwise libcurl loads CA
* certificates from the locations that were detected/specified at
* build-time
*/
curl_easy_setopt(curl, CURLOPT_CAINFO, NULL);
curl_easy_setopt(curl, CURLOPT_CAPATH, NULL);
/* first try: retrieve page without ca certificates -> should fail
* unless libcurl was built --with-ca-fallback enabled at build-time
*/
result = curl_easy_perform(curl);
if(result == CURLE_OK)
printf("*** transfer succeeded ***\n");
else
printf("*** transfer failed ***\n");
/* use a fresh connection (optional) this option seriously impacts
* performance of multiple transfers but it is necessary order to
* demonstrate this example. recall that the ssl ctx callback is only
* called _before_ an SSL connection is established, therefore it does not
* affect existing verified SSL connections already in the connection
* cache associated with this handle. normally you would set the ssl ctx
* function before making any transfers, and not use this option.
*/
curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1L);
/* second try: retrieve page using cacerts' certificate -> succeeds to
* load the certificate by installing a function doing the necessary
* "modifications" to the SSL CONTEXT before link init
*/
curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, sslctx_function);
result = curl_easy_perform(curl);
if(result == CURLE_OK)
printf("*** transfer succeeded ***\n");
else
printf("*** transfer failed ***\n");
curl_easy_cleanup(curl);
}
curl_global_cleanup();
return (int)result;
}
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