1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2014, 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 http://curl.haxx.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 ***************************************************************************/
22 /* Example using a "in core" PEM certificate to retrieve a https page.
23 * Written by Theo Borm
24 */
25
26 /* on a netBSD system with OPENSSL& LIBCURL installed from
27 * pkgsrc (using default paths) this program can be compiled using:
28 * gcc -I/usr/pkg/include -L/usr/pkg/lib -lcurl -Wl,-R/usr/pkg/lib -lssl
29 * -lcrypto -lz -o curlcacerttest curlcacerttest.c
30 * on other operating systems you may want to change paths to headers
31 * and libraries
32 */
33 #include <openssl/ssl.h>
34 #include <curl/curl.h>
35 #include <stdio.h>
36
writefunction(void * ptr,size_t size,size_t nmemb,void * stream)37 size_t writefunction( void *ptr, size_t size, size_t nmemb, void *stream)
38 {
39 fwrite(ptr,size,nmemb,stream);
40 return(nmemb*size);
41 }
42
sslctx_function(CURL * curl,void * sslctx,void * parm)43 static CURLcode sslctx_function(CURL * curl, void * sslctx, void * parm)
44 {
45 X509_STORE * store;
46 X509 * cert=NULL;
47 BIO * bio;
48 char * mypem = /* www.cacert.org */
49 "-----BEGIN CERTIFICATE-----\n"\
50 "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\
51 "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\
52 "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\
53 "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\
54 "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\
55 "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\
56 "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\
57 "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\
58 "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\
59 "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\
60 "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\
61 "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\
62 "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\
63 "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\
64 "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\
65 "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\
66 "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\
67 "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\
68 "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\
69 "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\
70 "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\
71 "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\
72 "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\
73 "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\
74 "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\
75 "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\
76 "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\
77 "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\
78 "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\
79 "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\
80 "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\
81 "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\
82 "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\
83 "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\
84 "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\
85 "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\
86 "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\
87 "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\
88 "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\
89 "-----END CERTIFICATE-----\n";
90 /* get a BIO */
91 bio=BIO_new_mem_buf(mypem, -1);
92 /* use it to read the PEM formatted certificate from memory into an X509
93 * structure that SSL can use
94 */
95 PEM_read_bio_X509(bio, &cert, 0, NULL);
96 if (cert == NULL)
97 printf("PEM_read_bio_X509 failed...\n");
98
99 /* get a pointer to the X509 certificate store (which may be empty!) */
100 store=SSL_CTX_get_cert_store((SSL_CTX *)sslctx);
101
102 /* add our certificate to this store */
103 if (X509_STORE_add_cert(store, cert)==0)
104 printf("error adding certificate\n");
105
106 /* decrease reference counts */
107 X509_free(cert);
108 BIO_free(bio);
109
110 /* all set to go */
111 return CURLE_OK ;
112 }
113
main(void)114 int main(void)
115 {
116 CURL * ch;
117 CURLcode rv;
118
119 rv=curl_global_init(CURL_GLOBAL_ALL);
120 ch=curl_easy_init();
121 rv=curl_easy_setopt(ch,CURLOPT_VERBOSE, 0L);
122 rv=curl_easy_setopt(ch,CURLOPT_HEADER, 0L);
123 rv=curl_easy_setopt(ch,CURLOPT_NOPROGRESS, 1L);
124 rv=curl_easy_setopt(ch,CURLOPT_NOSIGNAL, 1L);
125 rv=curl_easy_setopt(ch,CURLOPT_WRITEFUNCTION, *writefunction);
126 rv=curl_easy_setopt(ch,CURLOPT_WRITEDATA, stdout);
127 rv=curl_easy_setopt(ch,CURLOPT_HEADERFUNCTION, *writefunction);
128 rv=curl_easy_setopt(ch,CURLOPT_HEADERDATA, stderr);
129 rv=curl_easy_setopt(ch,CURLOPT_SSLCERTTYPE,"PEM");
130 rv=curl_easy_setopt(ch,CURLOPT_SSL_VERIFYPEER,1L);
131 rv=curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
132
133 /* first try: retrieve page without cacerts' certificate -> will fail
134 */
135 rv=curl_easy_perform(ch);
136 if (rv==CURLE_OK)
137 printf("*** transfer succeeded ***\n");
138 else
139 printf("*** transfer failed ***\n");
140
141 /* second try: retrieve page using cacerts' certificate -> will succeed
142 * load the certificate by installing a function doing the nescessary
143 * "modifications" to the SSL CONTEXT just before link init
144 */
145 rv=curl_easy_setopt(ch,CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
146 rv=curl_easy_perform(ch);
147 if (rv==CURLE_OK)
148 printf("*** transfer succeeded ***\n");
149 else
150 printf("*** transfer failed ***\n");
151
152 curl_easy_cleanup(ch);
153 curl_global_cleanup();
154 return rv;
155 }
156