1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24/* <DESC>
25 * CA cert in memory with OpenSSL to get an HTTPS page.
26 * </DESC>
27 */
28
29#include <openssl/err.h>
30#include <openssl/ssl.h>
31#include <curl/curl.h>
32#include <stdio.h>
33
34static size_t writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
35{
36  fwrite(ptr, size, nmemb, (FILE *)stream);
37  return (nmemb*size);
38}
39
40static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm)
41{
42  CURLcode rv = CURLE_ABORTED_BY_CALLBACK;
43
44  /** This example uses two (fake) certificates **/
45  static const char mypem[] =
46    "-----BEGIN CERTIFICATE-----\n"
47    "MIIH0zCCBbugAwIBAgIIXsO3pkN/pOAwDQYJKoZIhvcNAQEFBQAwQjESMBAGA1UE\n"
48    "AwwJQUNDVlJBSVoxMRAwDgYDVQQLDAdQS0lBQ0NWMQ0wCwYDVQQKDARBQ0NWMQsw\n"
49    "CQYDVQQGEwJFUzAeFw0xMTA1MDUwOTM3MzdaFw0zMDEyMzEwOTM3MzdaMEIxEjAQ\n"
50    "BgNVBAMMCUFDQ1ZSQUlaMTEQMA4GA1UECwwHUEtJQUNDVjENMAsGA1UECgwEQUND\n"
51    "VjELMAkGA1UEBhMCRVMwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCb\n"
52    "qau/YUqXry+XZpp0X9DZlv3P4uRm7x8fRzPCRKPfmt4ftVTdFXxpNRFvu8gMjmoY\n"
53    "HtiP2Ra8EEg2XPBjs5BaXCQ316PWywlxufEBcoSwfdtNgM3802/J+Nq2DoLSRYWo\n"
54    "G2ioPej0RGy9ocLLA76MPhMAhN9KSMDjIgro6TenGEyxCQ0jVn8ETdkXhBilyNpA\n"
55    "0KIV9VMJcRz/RROE5iZe+OCIHAr8Fraocwa48GOEAqDGWuzndN9wrqODJerWx5eH\n"
56    "k6fGioozl2A3ED6XPm4pFdahD9GILBKfb6qkxkLrQaLjlUPTAYVtjrs78yM2x/47\n"
57    "JyCpZET/LtZ1qmxNYEAZSUNUY9rizLpm5U9EelvZaoErQNV/+QEnWCzI7UiRfD+m\n"
58    "AM/EKXMRNt6GGT6d7hmKG9Ww7Y49nCrADdg9ZuM8Db3VlFzi4qc1GwQA9j9ajepD\n"
59    "vV+JHanBsMyZ4k0ACtrJJ1vnE5Bc5PUzolVt3OAJTS+xJlsndQAJxGJ3KQhfnlms\n"
60    "tn6tn1QwIgPBHnFk/vk4CpYY3QIUrCPLBhwepH2NDd4nQeit2hW3sCPdK6jT2iWH\n"
61    "7ehVRE2I9DZ+hJp4rPcOVkkO1jMl1oRQQmwgEh0q1b688nCBpHBgvgW1m54ERL5h\n"
62    "I6zppSSMEYCUWqKiuUnSwdzRp+0xESyeGabu4VXhwOrPDYTkF7eifKXeVSUG7szA\n"
63    "h1xA2syVP1XgNce4hL60Xc16gwFy7ofmXx2utYXGJt/mwZrpHgJHnyqobalbz+xF\n"
64    "d3+YJ5oyXSrjhO7FmGYvliAd3djDJ9ew+f7Zfc3Qn48LFFhRny+Lwzgt3uiP1o2H\n"
65    "pPVWQxaZLPSkVrQ0uGE3ycJYgBugl6H8WY3pEfbRD0tVNEYqi4Y7\n"
66    "-----END CERTIFICATE-----\n"
67    "-----BEGIN CERTIFICATE-----\n"
68    "MIIFtTCCA52gAwIBAgIIYY3HhjsBggUwDQYJKoZIhvcNAQEFBQAwRDEWMBQGA1UE\n"
69    "AwwNQUNFRElDT00gUm9vdDEMMAoGA1UECwwDUEtJMQ8wDQYDVQQKDAZFRElDT00x\n"
70    "CzAJBgNVBAYTAkVTMB4XDTA4MDQxODE2MjQyMloXDTI4MDQxMzE2MjQyMlowRDEW\n"
71    "MBQGA1UEAwwNQUNFRElDT00gUm9vdDEMMAoGA1UECwwDUEtJMQ8wDQYDVQQKDAZF\n"
72    "RElDT00xCzAJBgNVBAYTAkVTMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKC\n"
73    "AgEA/5KV4WgGdrQsyFhIyv2AVClVYyT/kGWbEHV7w2rbYgIB8hiGtXxaOLHkWLn7\n"
74    "09gtn70yN78sFW2+tfQh0hOR2QetAQXW8713zl9CgQr5auODAKgrLlUTY4HKRxx7\n"
75    "XBZXehuDYAQ6PmXDzQHe3qTWDLqO3tkE7hdWIpuPY/1NFgu3e3eM+SW10W2ZEi5P\n"
76    "gvoFNTPhNahXwOf9jU8/kzJPeGYDdwdY6ZXIfj7QeQCM8htRM5u8lOk6e25SLTKe\n"
77    "I6RF+7YuE7CLGLHdztUdp0J/Vb77W7tH1PwkzQSulgUV1qzOMPPKC8W64iLgpq0i\n"
78    "5ALudBF/TP94HTXa5gI06xgSYXcGCRZj6hitoocf8seACQl1ThCojz2GuHURwCRi\n"
79    "ipZ7SkXp7FnFvmuD5uHorLUwHv4FB4D54SMNUI8FmP8sX+g7tq3PgbUhh8oIKiMn\n"
80    "MCArz+2UW6yyetLHKKGKC5tNSixthT8Jcjxn4tncB7rrZXtaAWPWkFtPF2Y9fwsZ\n"
81    "o5NjEFIqnxQWWOLcpfShFosOkYuByptZ+thrkQdlVV9SH686+5DdaaVbnG0OLLb6\n"
82    "zqylfDJKZ0DcMDQj3dcEI2bw/FWAp/tmGYI1Z2JwOV5vx+qQQEQIHriy1tvuWacN\n"
83    "GHk0vFQYXlPKNFHtRQrmjseCNj6nOGOpMCwXEGCSn1WHElkQwg9naRHMTh5+Spqt\n"
84    "r0CodaxWkHS4oJyleW/c6RrIaQXpuvoDs3zk4E7Czp3otkYNbn5XOmeUwssfnHdK\n"
85    "Z05phkOTOPu220+DkdRgfks+KzgHVZhepA==\n"
86    "-----END CERTIFICATE-----\n";
87
88  BIO *cbio = BIO_new_mem_buf(mypem, sizeof(mypem));
89  X509_STORE  *cts = SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
90  int i;
91  STACK_OF(X509_INFO) *inf;
92  (void)curl;
93  (void)parm;
94
95  if(!cts || !cbio) {
96    return rv;
97  }
98
99  inf = PEM_X509_INFO_read_bio(cbio, NULL, NULL, NULL);
100
101  if(!inf) {
102    BIO_free(cbio);
103    return rv;
104  }
105
106  for(i = 0; i < sk_X509_INFO_num(inf); i++) {
107    X509_INFO *itmp = sk_X509_INFO_value(inf, i);
108    if(itmp->x509) {
109      X509_STORE_add_cert(cts, itmp->x509);
110    }
111    if(itmp->crl) {
112      X509_STORE_add_crl(cts, itmp->crl);
113    }
114  }
115
116  sk_X509_INFO_pop_free(inf, X509_INFO_free);
117  BIO_free(cbio);
118
119  rv = CURLE_OK;
120  return rv;
121}
122
123int main(void)
124{
125  CURL *ch;
126  CURLcode rv;
127
128  curl_global_init(CURL_GLOBAL_ALL);
129  ch = curl_easy_init();
130  curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
131  curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
132  curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
133  curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
134  curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
135  curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
136  curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
137  curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
138  curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
139  curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
140  curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
141
142  /* Turn off the default CA locations, otherwise libcurl will load CA
143   * certificates from the locations that were detected/specified at
144   * build-time
145   */
146  curl_easy_setopt(ch, CURLOPT_CAINFO, NULL);
147  curl_easy_setopt(ch, CURLOPT_CAPATH, NULL);
148
149  /* first try: retrieve page without ca certificates -> should fail
150   * unless libcurl was built --with-ca-fallback enabled at build-time
151   */
152  rv = curl_easy_perform(ch);
153  if(rv == CURLE_OK)
154    printf("*** transfer succeeded ***\n");
155  else
156    printf("*** transfer failed ***\n");
157
158  /* use a fresh connection (optional)
159   * this option seriously impacts performance of multiple transfers but
160   * it is necessary order to demonstrate this example. recall that the
161   * ssl ctx callback is only called _before_ an SSL connection is
162   * established, therefore it will not affect existing verified SSL
163   * connections already in the connection cache associated with this
164   * handle. normally you would set the ssl ctx function before making
165   * any transfers, and not use this option.
166   */
167  curl_easy_setopt(ch, CURLOPT_FRESH_CONNECT, 1L);
168
169  /* second try: retrieve page using cacerts' certificate -> will succeed
170   * load the certificate by installing a function doing the necessary
171   * "modifications" to the SSL CONTEXT just before link init
172   */
173  curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, sslctx_function);
174  rv = curl_easy_perform(ch);
175  if(rv == CURLE_OK)
176    printf("*** transfer succeeded ***\n");
177  else
178    printf("*** transfer failed ***\n");
179
180  curl_easy_cleanup(ch);
181  curl_global_cleanup();
182  return rv;
183}
184