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
34 #if defined(__GNUC__) || defined(__clang__)
35 #pragma GCC diagnostic ignored "-Woverlength-strings"
36 #endif
37
writefunction(void * ptr,size_t size,size_t nmemb,void * stream)38 static size_t writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
39 {
40 fwrite(ptr, size, nmemb, (FILE *)stream);
41 return nmemb * size;
42 }
43
sslctx_function(CURL * curl,void * sslctx,void * parm)44 static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm)
45 {
46 CURLcode rv = CURLE_ABORTED_BY_CALLBACK;
47
48 /** This example uses two (fake) certificates **/
49 static const char mypem[] =
50 "-----BEGIN CERTIFICATE-----\n"
51 "MIIH0zCCBbugAwIBAgIIXsO3pkN/pOAwDQYJKoZIhvcNAQEFBQAwQjESMBAGA1UE\n"
52 "AwwJQUNDVlJBSVoxMRAwDgYDVQQLDAdQS0lBQ0NWMQ0wCwYDVQQKDARBQ0NWMQsw\n"
53 "CQYDVQQGEwJFUzAeFw0xMTA1MDUwOTM3MzdaFw0zMDEyMzEwOTM3MzdaMEIxEjAQ\n"
54 "BgNVBAMMCUFDQ1ZSQUlaMTEQMA4GA1UECwwHUEtJQUNDVjENMAsGA1UECgwEQUND\n"
55 "VjELMAkGA1UEBhMCRVMwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCb\n"
56 "qau/YUqXry+XZpp0X9DZlv3P4uRm7x8fRzPCRKPfmt4ftVTdFXxpNRFvu8gMjmoY\n"
57 "HtiP2Ra8EEg2XPBjs5BaXCQ316PWywlxufEBcoSwfdtNgM3802/J+Nq2DoLSRYWo\n"
58 "G2ioPej0RGy9ocLLA76MPhMAhN9KSMDjIgro6TenGEyxCQ0jVn8ETdkXhBilyNpA\n"
59 "0KIV9VMJcRz/RROE5iZe+OCIHAr8Fraocwa48GOEAqDGWuzndN9wrqODJerWx5eH\n"
60 "k6fGioozl2A3ED6XPm4pFdahD9GILBKfb6qkxkLrQaLjlUPTAYVtjrs78yM2x/47\n"
61 "JyCpZET/LtZ1qmxNYEAZSUNUY9rizLpm5U9EelvZaoErQNV/+QEnWCzI7UiRfD+m\n"
62 "AM/EKXMRNt6GGT6d7hmKG9Ww7Y49nCrADdg9ZuM8Db3VlFzi4qc1GwQA9j9ajepD\n"
63 "vV+JHanBsMyZ4k0ACtrJJ1vnE5Bc5PUzolVt3OAJTS+xJlsndQAJxGJ3KQhfnlms\n"
64 "tn6tn1QwIgPBHnFk/vk4CpYY3QIUrCPLBhwepH2NDd4nQeit2hW3sCPdK6jT2iWH\n"
65 "7ehVRE2I9DZ+hJp4rPcOVkkO1jMl1oRQQmwgEh0q1b688nCBpHBgvgW1m54ERL5h\n"
66 "I6zppSSMEYCUWqKiuUnSwdzRp+0xESyeGabu4VXhwOrPDYTkF7eifKXeVSUG7szA\n"
67 "h1xA2syVP1XgNce4hL60Xc16gwFy7ofmXx2utYXGJt/mwZrpHgJHnyqobalbz+xF\n"
68 "d3+YJ5oyXSrjhO7FmGYvliAd3djDJ9ew+f7Zfc3Qn48LFFhRny+Lwzgt3uiP1o2H\n"
69 "pPVWQxaZLPSkVrQ0uGE3ycJYgBugl6H8WY3pEfbRD0tVNEYqi4Y7\n"
70 "-----END CERTIFICATE-----\n"
71 "-----BEGIN CERTIFICATE-----\n"
72 "MIIFtTCCA52gAwIBAgIIYY3HhjsBggUwDQYJKoZIhvcNAQEFBQAwRDEWMBQGA1UE\n"
73 "AwwNQUNFRElDT00gUm9vdDEMMAoGA1UECwwDUEtJMQ8wDQYDVQQKDAZFRElDT00x\n"
74 "CzAJBgNVBAYTAkVTMB4XDTA4MDQxODE2MjQyMloXDTI4MDQxMzE2MjQyMlowRDEW\n"
75 "MBQGA1UEAwwNQUNFRElDT00gUm9vdDEMMAoGA1UECwwDUEtJMQ8wDQYDVQQKDAZF\n"
76 "RElDT00xCzAJBgNVBAYTAkVTMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKC\n"
77 "AgEA/5KV4WgGdrQsyFhIyv2AVClVYyT/kGWbEHV7w2rbYgIB8hiGtXxaOLHkWLn7\n"
78 "09gtn70yN78sFW2+tfQh0hOR2QetAQXW8713zl9CgQr5auODAKgrLlUTY4HKRxx7\n"
79 "XBZXehuDYAQ6PmXDzQHe3qTWDLqO3tkE7hdWIpuPY/1NFgu3e3eM+SW10W2ZEi5P\n"
80 "gvoFNTPhNahXwOf9jU8/kzJPeGYDdwdY6ZXIfj7QeQCM8htRM5u8lOk6e25SLTKe\n"
81 "I6RF+7YuE7CLGLHdztUdp0J/Vb77W7tH1PwkzQSulgUV1qzOMPPKC8W64iLgpq0i\n"
82 "5ALudBF/TP94HTXa5gI06xgSYXcGCRZj6hitoocf8seACQl1ThCojz2GuHURwCRi\n"
83 "ipZ7SkXp7FnFvmuD5uHorLUwHv4FB4D54SMNUI8FmP8sX+g7tq3PgbUhh8oIKiMn\n"
84 "MCArz+2UW6yyetLHKKGKC5tNSixthT8Jcjxn4tncB7rrZXtaAWPWkFtPF2Y9fwsZ\n"
85 "o5NjEFIqnxQWWOLcpfShFosOkYuByptZ+thrkQdlVV9SH686+5DdaaVbnG0OLLb6\n"
86 "zqylfDJKZ0DcMDQj3dcEI2bw/FWAp/tmGYI1Z2JwOV5vx+qQQEQIHriy1tvuWacN\n"
87 "GHk0vFQYXlPKNFHtRQrmjseCNj6nOGOpMCwXEGCSn1WHElkQwg9naRHMTh5+Spqt\n"
88 "r0CodaxWkHS4oJyleW/c6RrIaQXpuvoDs3zk4E7Czp3otkYNbn5XOmeUwssfnHdK\n"
89 "Z05phkOTOPu220+DkdRgfks+KzgHVZhepA==\n"
90 "-----END CERTIFICATE-----\n";
91
92 BIO *cbio = BIO_new_mem_buf(mypem, sizeof(mypem));
93 X509_STORE *cts = SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
94 int i;
95 STACK_OF(X509_INFO) *inf;
96 (void)curl;
97 (void)parm;
98
99 if(!cts || !cbio) {
100 return rv;
101 }
102
103 inf = PEM_X509_INFO_read_bio(cbio, NULL, NULL, NULL);
104
105 if(!inf) {
106 BIO_free(cbio);
107 return rv;
108 }
109
110 for(i = 0; i < sk_X509_INFO_num(inf); i++) {
111 X509_INFO *itmp = sk_X509_INFO_value(inf, i);
112 if(itmp->x509) {
113 X509_STORE_add_cert(cts, itmp->x509);
114 }
115 if(itmp->crl) {
116 X509_STORE_add_crl(cts, itmp->crl);
117 }
118 }
119
120 sk_X509_INFO_pop_free(inf, X509_INFO_free);
121 BIO_free(cbio);
122
123 rv = CURLE_OK;
124 return rv;
125 }
126
main(void)127 int main(void)
128 {
129 CURL *ch;
130 CURLcode rv;
131
132 curl_global_init(CURL_GLOBAL_ALL);
133 ch = curl_easy_init();
134 curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
135 curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
136 curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
137 curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
138 curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
139 curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
140 curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
141 curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
142 curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
143 curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 1L);
144 curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
145
146 /* Turn off the default CA locations, otherwise libcurl loads CA
147 * certificates from the locations that were detected/specified at
148 * build-time
149 */
150 curl_easy_setopt(ch, CURLOPT_CAINFO, NULL);
151 curl_easy_setopt(ch, CURLOPT_CAPATH, NULL);
152
153 /* first try: retrieve page without ca certificates -> should fail
154 * unless libcurl was built --with-ca-fallback enabled at build-time
155 */
156 rv = curl_easy_perform(ch);
157 if(rv == CURLE_OK)
158 printf("*** transfer succeeded ***\n");
159 else
160 printf("*** transfer failed ***\n");
161
162 /* use a fresh connection (optional) this option seriously impacts
163 * performance of multiple transfers but it is necessary order to
164 * demonstrate this example. recall that the ssl ctx callback is only called
165 * _before_ an SSL connection is established, therefore it does not affect
166 * existing verified SSL connections already in the connection cache
167 * associated with this handle. normally you would set the ssl ctx function
168 * before making any transfers, and not use this option.
169 */
170 curl_easy_setopt(ch, CURLOPT_FRESH_CONNECT, 1L);
171
172 /* second try: retrieve page using cacerts' certificate -> succeeds to load
173 * the certificate by installing a function doing the necessary
174 * "modifications" to the SSL CONTEXT just before link init
175 */
176 curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, sslctx_function);
177 rv = curl_easy_perform(ch);
178 if(rv == CURLE_OK)
179 printf("*** transfer succeeded ***\n");
180 else
181 printf("*** transfer failed ***\n");
182
183 curl_easy_cleanup(ch);
184 curl_global_cleanup();
185 return (int)rv;
186 }
187