1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 2013, 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 an in memory PEM user certificate and RSA key to retrieve an
23 * https page.
24 * Written by Ishan SinghLevett, based on Theo Borm's cacertinmem.c.
25 * Note that to maintain simplicity this example does not use a CA certificate
26 * for peer verification.  However, some form of peer verification
27 * must be used in real circumstances when a secure connection is required.
28 */
29
30#include <openssl/ssl.h>
31#include <openssl/x509.h>
32#include <openssl/pem.h>
33#include <curl/curl.h>
34#include <stdio.h>
35
36static size_t writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
37{
38  fwrite(ptr,size,nmemb,stream);
39  return(nmemb*size);
40}
41
42static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm)
43{
44  X509 *cert = NULL;
45  BIO *bio = NULL;
46  BIO *kbio = NULL;
47  RSA *rsa = NULL;
48  int ret;
49
50  const char *mypem = /* www.cacert.org */
51    "-----BEGIN CERTIFICATE-----\n"\
52    "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\
53    "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\
54    "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\
55    "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\
56    "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\
57    "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\
58    "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\
59    "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\
60    "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\
61    "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\
62    "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\
63    "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\
64    "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\
65    "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\
66    "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\
67    "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\
68    "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\
69    "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\
70    "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\
71    "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\
72    "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\
73    "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\
74    "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\
75    "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\
76    "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\
77    "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\
78    "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\
79    "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\
80    "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\
81    "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\
82    "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\
83    "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\
84    "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\
85    "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\
86    "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\
87    "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\
88    "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\
89    "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\
90    "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\
91    "-----END CERTIFICATE-----\n";
92
93/*replace the XXX with the actual RSA key*/
94  const char *mykey =
95    "-----BEGIN RSA PRIVATE KEY-----\n"\
96    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
97    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
98    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
99    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
100    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
101    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
102    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
103    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
104    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
105    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
106    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
107    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
108    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
109    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
110    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
111    "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
112    "-----END RSA PRIVATE KEY-----\n";
113
114  (void)curl; /* avoid warnings */
115  (void)parm; /* avoid warnings */
116
117  /* get a BIO */
118  bio = BIO_new_mem_buf((char *)mypem, -1);
119
120  if (bio == NULL) {
121    printf("BIO_new_mem_buf failed\n");
122  }
123
124  /* use it to read the PEM formatted certificate from memory into an X509
125   * structure that SSL can use
126   */
127  cert = PEM_read_bio_X509(bio, NULL, 0, NULL);
128  if (cert == NULL) {
129    printf("PEM_read_bio_X509 failed...\n");
130  }
131
132  /*tell SSL to use the X509 certificate*/
133  ret = SSL_CTX_use_certificate((SSL_CTX*)sslctx, cert);
134  if (ret != 1) {
135    printf("Use certificate failed\n");
136  }
137
138  /*create a bio for the RSA key*/
139  kbio = BIO_new_mem_buf((char *)mykey, -1);
140  if (kbio == NULL) {
141    printf("BIO_new_mem_buf failed\n");
142  }
143
144  /*read the key bio into an RSA object*/
145  rsa = PEM_read_bio_RSAPrivateKey(kbio, NULL, 0, NULL);
146  if (rsa == NULL) {
147    printf("Failed to create key bio\n");
148  }
149
150  /*tell SSL to use the RSA key from memory*/
151  ret = SSL_CTX_use_RSAPrivateKey((SSL_CTX*)sslctx, rsa);
152  if (ret != 1) {
153    printf("Use Key failed\n");
154  }
155
156  /* free resources that have been allocated by openssl functions */
157  if (bio)
158    BIO_free(bio);
159
160  if (kbio)
161    BIO_free(kbio);
162
163  if (rsa)
164    RSA_free(rsa);
165
166  if (cert)
167    X509_free(cert);
168
169  /* all set to go */
170  return CURLE_OK ;
171}
172
173int main(void)
174{
175  CURL *ch;
176  CURLcode rv;
177
178  rv = curl_global_init(CURL_GLOBAL_ALL);
179  ch = curl_easy_init();
180  rv = curl_easy_setopt(ch,CURLOPT_VERBOSE, 0L);
181  rv = curl_easy_setopt(ch,CURLOPT_HEADER, 0L);
182  rv = curl_easy_setopt(ch,CURLOPT_NOPROGRESS, 1L);
183  rv = curl_easy_setopt(ch,CURLOPT_NOSIGNAL, 1L);
184  rv = curl_easy_setopt(ch,CURLOPT_WRITEFUNCTION, *writefunction);
185  rv = curl_easy_setopt(ch,CURLOPT_WRITEDATA, stdout);
186  rv = curl_easy_setopt(ch,CURLOPT_HEADERFUNCTION, *writefunction);
187  rv = curl_easy_setopt(ch,CURLOPT_WRITEHEADER, stderr);
188  rv = curl_easy_setopt(ch,CURLOPT_SSLCERTTYPE,"PEM");
189
190  /* both VERIFYPEER and VERIFYHOST are set to 0 in this case because there is
191     no CA certificate*/
192
193  rv = curl_easy_setopt(ch,CURLOPT_SSL_VERIFYPEER, 0L);
194  rv = curl_easy_setopt(ch,CURLOPT_SSL_VERIFYHOST, 0L);
195  rv = curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
196  rv = curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM");
197
198  /* first try: retrieve page without user certificate and key -> will fail
199   */
200  rv = curl_easy_perform(ch);
201  if (rv==CURLE_OK) {
202    printf("*** transfer succeeded ***\n");
203  }
204  else {
205    printf("*** transfer failed ***\n");
206  }
207
208  /* second try: retrieve page using user certificate and key -> will succeed
209   * load the certificate and key by installing a function doing the necessary
210   * "modifications" to the SSL CONTEXT just before link init
211   */
212  rv = curl_easy_setopt(ch,CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
213  rv = curl_easy_perform(ch);
214  if (rv==CURLE_OK) {
215    printf("*** transfer succeeded ***\n");
216  }
217  else {
218    printf("*** transfer failed ***\n");
219  }
220
221  curl_easy_cleanup(ch);
222  curl_global_cleanup();
223  return rv;
224}
225