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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
*
***************************************************************************/
#include "first.h"
/*
* Verify correct order of certificates in the chain by comparing the
* subject and issuer attributes of each certificate.
*/
static bool is_chain_in_order(struct curl_certinfo *cert_info)
{
char *last_issuer = NULL;
int cert;
/* Chains with only a single certificate are always in order */
if(cert_info->num_of_certs <= 1)
return 1;
/* Enumerate each certificate in the chain */
for(cert = 0; cert < cert_info->num_of_certs; cert++) {
struct curl_slist *slist = cert_info->certinfo[cert];
char *issuer = NULL;
char *subject = NULL;
/* Find the certificate issuer and subject by enumerating each field */
for(; slist && (!issuer || !subject); slist = slist->next) {
static const char issuer_prefix[] = "Issuer:";
static const char subject_prefix[] = "Subject:";
if(!strncmp(slist->data, issuer_prefix, sizeof(issuer_prefix) - 1)) {
issuer = slist->data + sizeof(issuer_prefix) - 1;
}
if(!strncmp(slist->data, subject_prefix, sizeof(subject_prefix) - 1)) {
subject = slist->data + sizeof(subject_prefix) - 1;
}
}
if(subject && issuer) {
curl_mprintf("cert %d\n", cert);
curl_mprintf(" subject: %s\n", subject);
curl_mprintf(" issuer: %s\n", issuer);
if(last_issuer) {
/* If the last certificate's issuer matches the current certificate's
* subject, then the chain is in order */
if(strcmp(last_issuer, subject) != 0) {
curl_mfprintf(stderr,
"cert %d issuer does not match cert %d subject\n",
cert - 1, cert);
curl_mfprintf(stderr, "certificate chain is not in order\n");
return false;
}
}
}
last_issuer = issuer;
}
curl_mprintf("certificate chain is in order\n");
return true;
}
static size_t wrfu(void *ptr, size_t size, size_t nmemb, void *stream)
{
(void)stream;
(void)ptr;
return size * nmemb;
}
static CURLcode test_lib3102(const char *URL)
{
CURL *curl;
CURLcode result = CURLE_OK;
if(curl_global_init(CURL_GLOBAL_ALL) != CURLE_OK) {
curl_mfprintf(stderr, "curl_global_init() failed\n");
return TEST_ERR_MAJOR_BAD;
}
curl = curl_easy_init();
if(!curl) {
curl_mfprintf(stderr, "curl_easy_init() failed\n");
curl_global_cleanup();
return TEST_ERR_MAJOR_BAD;
}
/* Set the HTTPS URL to retrieve. */
test_setopt(curl, CURLOPT_URL, URL);
/* Capture certificate information */
test_setopt(curl, CURLOPT_CERTINFO, 1L);
/* Ignore output */
test_setopt(curl, CURLOPT_WRITEFUNCTION, wrfu);
/* No peer verify */
test_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
test_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
/* Perform the request, result will get the return code */
result = curl_easy_perform(curl);
if(!result || result == CURLE_GOT_NOTHING) {
struct curl_certinfo *cert_info = NULL;
/* Get the certificate information */
result = curl_easy_getinfo(curl, CURLINFO_CERTINFO, &cert_info);
if(!result) {
/* Check to see if the certificate chain is ordered correctly */
if(!is_chain_in_order(cert_info))
result = TEST_ERR_FAILURE;
}
}
test_cleanup:
/* always cleanup */
curl_easy_cleanup(curl);
curl_global_cleanup();
return result;
}
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