1: /***************************************************************************
2: * _ _ ____ _
3: * Project ___| | | | _ \| |
4: * / __| | | | |_) | |
5: * | (__| |_| | _ <| |___
6: * \___|\___/|_| \_\_____|
7: *
8: * Copyright (C) 2013 - 2019, 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.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: /* <DESC>
23: * Use an in-memory user certificate and RSA key and retrieve an https page.
24: * </DESC>
25: */
26: /* Written by Ishan SinghLevett, based on Theo Borm's cacertinmem.c.
27: * Note that to maintain simplicity this example does not use a CA certificate
28: * for peer verification. However, some form of peer verification
29: * must be used in real circumstances when a secure connection is required.
30: */
31:
32: #include <openssl/ssl.h>
33: #include <openssl/x509.h>
34: #include <openssl/pem.h>
35: #include <curl/curl.h>
36: #include <stdio.h>
37:
38: static size_t writefunction(void *ptr, size_t size, size_t nmemb, void *stream)
39: {
40: fwrite(ptr, size, nmemb, stream);
41: return (nmemb*size);
42: }
43:
44: static CURLcode sslctx_function(CURL *curl, void *sslctx, void *parm)
45: {
46: X509 *cert = NULL;
47: BIO *bio = NULL;
48: BIO *kbio = NULL;
49: RSA *rsa = NULL;
50: int ret;
51:
52: const char *mypem = /* www.cacert.org */
53: "-----BEGIN CERTIFICATE-----\n"\
54: "MIIHPTCCBSWgAwIBAgIBADANBgkqhkiG9w0BAQQFADB5MRAwDgYDVQQKEwdSb290\n"\
55: "IENBMR4wHAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNB\n"\
56: "IENlcnQgU2lnbmluZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRA\n"\
57: "Y2FjZXJ0Lm9yZzAeFw0wMzAzMzAxMjI5NDlaFw0zMzAzMjkxMjI5NDlaMHkxEDAO\n"\
58: "BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEi\n"\
59: "MCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ\n"\
60: "ARYSc3VwcG9ydEBjYWNlcnQub3JnMIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIIC\n"\
61: "CgKCAgEAziLA4kZ97DYoB1CW8qAzQIxL8TtmPzHlawI229Z89vGIj053NgVBlfkJ\n"\
62: "8BLPRoZzYLdufujAWGSuzbCtRRcMY/pnCujW0r8+55jE8Ez64AO7NV1sId6eINm6\n"\
63: "zWYyN3L69wj1x81YyY7nDl7qPv4coRQKFWyGhFtkZip6qUtTefWIonvuLwphK42y\n"\
64: "fk1WpRPs6tqSnqxEQR5YYGUFZvjARL3LlPdCfgv3ZWiYUQXw8wWRBB0bF4LsyFe7\n"\
65: "w2t6iPGwcswlWyCR7BYCEo8y6RcYSNDHBS4CMEK4JZwFaz+qOqfrU0j36NK2B5jc\n"\
66: "G8Y0f3/JHIJ6BVgrCFvzOKKrF11myZjXnhCLotLddJr3cQxyYN/Nb5gznZY0dj4k\n"\
67: "epKwDpUeb+agRThHqtdB7Uq3EvbXG4OKDy7YCbZZ16oE/9KTfWgu3YtLq1i6L43q\n"\
68: "laegw1SJpfvbi1EinbLDvhG+LJGGi5Z4rSDTii8aP8bQUWWHIbEZAWV/RRyH9XzQ\n"\
69: "QUxPKZgh/TMfdQwEUfoZd9vUFBzugcMd9Zi3aQaRIt0AUMyBMawSB3s42mhb5ivU\n"\
70: "fslfrejrckzzAeVLIL+aplfKkQABi6F1ITe1Yw1nPkZPcCBnzsXWWdsC4PDSy826\n"\
71: "YreQQejdIOQpvGQpQsgi3Hia/0PsmBsJUUtaWsJx8cTLc6nloQsCAwEAAaOCAc4w\n"\
72: "ggHKMB0GA1UdDgQWBBQWtTIb1Mfz4OaO873SsDrusjkY0TCBowYDVR0jBIGbMIGY\n"\
73: "gBQWtTIb1Mfz4OaO873SsDrusjkY0aF9pHsweTEQMA4GA1UEChMHUm9vdCBDQTEe\n"\
74: "MBwGA1UECxMVaHR0cDovL3d3dy5jYWNlcnQub3JnMSIwIAYDVQQDExlDQSBDZXJ0\n"\
75: "IFNpZ25pbmcgQXV0aG9yaXR5MSEwHwYJKoZIhvcNAQkBFhJzdXBwb3J0QGNhY2Vy\n"\
76: "dC5vcmeCAQAwDwYDVR0TAQH/BAUwAwEB/zAyBgNVHR8EKzApMCegJaAjhiFodHRw\n"\
77: "czovL3d3dy5jYWNlcnQub3JnL3Jldm9rZS5jcmwwMAYJYIZIAYb4QgEEBCMWIWh0\n"\
78: "dHBzOi8vd3d3LmNhY2VydC5vcmcvcmV2b2tlLmNybDA0BglghkgBhvhCAQgEJxYl\n"\
79: "aHR0cDovL3d3dy5jYWNlcnQub3JnL2luZGV4LnBocD9pZD0xMDBWBglghkgBhvhC\n"\
80: "AQ0ESRZHVG8gZ2V0IHlvdXIgb3duIGNlcnRpZmljYXRlIGZvciBGUkVFIGhlYWQg\n"\
81: "b3ZlciB0byBodHRwOi8vd3d3LmNhY2VydC5vcmcwDQYJKoZIhvcNAQEEBQADggIB\n"\
82: "ACjH7pyCArpcgBLKNQodgW+JapnM8mgPf6fhjViVPr3yBsOQWqy1YPaZQwGjiHCc\n"\
83: "nWKdpIevZ1gNMDY75q1I08t0AoZxPuIrA2jxNGJARjtT6ij0rPtmlVOKTV39O9lg\n"\
84: "18p5aTuxZZKmxoGCXJzN600BiqXfEVWqFcofN8CCmHBh22p8lqOOLlQ+TyGpkO/c\n"\
85: "gr/c6EWtTZBzCDyUZbAEmXZ/4rzCahWqlwQ3JNgelE5tDlG+1sSPypZt90Pf6DBl\n"\
86: "Jzt7u0NDY8RD97LsaMzhGY4i+5jhe1o+ATc7iwiwovOVThrLm82asduycPAtStvY\n"\
87: "sONvRUgzEv/+PDIqVPfE94rwiCPCR/5kenHA0R6mY7AHfqQv0wGP3J8rtsYIqQ+T\n"\
88: "SCX8Ev2fQtzzxD72V7DX3WnRBnc0CkvSyqD/HMaMyRa+xMwyN2hzXwj7UfdJUzYF\n"\
89: "CpUCTPJ5GhD22Dp1nPMd8aINcGeGG7MW9S/lpOt5hvk9C8JzC6WZrG/8Z7jlLwum\n"\
90: "GCSNe9FINSkYQKyTYOGWhlC0elnYjyELn8+CkcY7v2vcB5G5l1YjqrZslMZIBjzk\n"\
91: "zk6q5PYvCdxTby78dOs6Y5nCpqyJvKeyRKANihDjbPIky/qbn3BHLt4Ui9SyIAmW\n"\
92: "omTxJBzcoTWcFbLUvFUufQb1nA5V9FrWk9p2rSVzTMVD\n"\
93: "-----END CERTIFICATE-----\n";
94:
95: /*replace the XXX with the actual RSA key*/
96: const char *mykey =
97: "-----BEGIN RSA PRIVATE KEY-----\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: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
113: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\n"\
114: "-----END RSA PRIVATE KEY-----\n";
115:
116: (void)curl; /* avoid warnings */
117: (void)parm; /* avoid warnings */
118:
119: /* get a BIO */
120: bio = BIO_new_mem_buf((char *)mypem, -1);
121:
122: if(bio == NULL) {
123: printf("BIO_new_mem_buf failed\n");
124: }
125:
126: /* use it to read the PEM formatted certificate from memory into an X509
127: * structure that SSL can use
128: */
129: cert = PEM_read_bio_X509(bio, NULL, 0, NULL);
130: if(cert == NULL) {
131: printf("PEM_read_bio_X509 failed...\n");
132: }
133:
134: /*tell SSL to use the X509 certificate*/
135: ret = SSL_CTX_use_certificate((SSL_CTX*)sslctx, cert);
136: if(ret != 1) {
137: printf("Use certificate failed\n");
138: }
139:
140: /*create a bio for the RSA key*/
141: kbio = BIO_new_mem_buf((char *)mykey, -1);
142: if(kbio == NULL) {
143: printf("BIO_new_mem_buf failed\n");
144: }
145:
146: /*read the key bio into an RSA object*/
147: rsa = PEM_read_bio_RSAPrivateKey(kbio, NULL, 0, NULL);
148: if(rsa == NULL) {
149: printf("Failed to create key bio\n");
150: }
151:
152: /*tell SSL to use the RSA key from memory*/
153: ret = SSL_CTX_use_RSAPrivateKey((SSL_CTX*)sslctx, rsa);
154: if(ret != 1) {
155: printf("Use Key failed\n");
156: }
157:
158: /* free resources that have been allocated by openssl functions */
159: if(bio)
160: BIO_free(bio);
161:
162: if(kbio)
163: BIO_free(kbio);
164:
165: if(rsa)
166: RSA_free(rsa);
167:
168: if(cert)
169: X509_free(cert);
170:
171: /* all set to go */
172: return CURLE_OK;
173: }
174:
175: int main(void)
176: {
177: CURL *ch;
178: CURLcode rv;
179:
180: curl_global_init(CURL_GLOBAL_ALL);
181: ch = curl_easy_init();
182: curl_easy_setopt(ch, CURLOPT_VERBOSE, 0L);
183: curl_easy_setopt(ch, CURLOPT_HEADER, 0L);
184: curl_easy_setopt(ch, CURLOPT_NOPROGRESS, 1L);
185: curl_easy_setopt(ch, CURLOPT_NOSIGNAL, 1L);
186: curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, writefunction);
187: curl_easy_setopt(ch, CURLOPT_WRITEDATA, stdout);
188: curl_easy_setopt(ch, CURLOPT_HEADERFUNCTION, writefunction);
189: curl_easy_setopt(ch, CURLOPT_HEADERDATA, stderr);
190: curl_easy_setopt(ch, CURLOPT_SSLCERTTYPE, "PEM");
191:
192: /* both VERIFYPEER and VERIFYHOST are set to 0 in this case because there is
193: no CA certificate*/
194:
195: curl_easy_setopt(ch, CURLOPT_SSL_VERIFYPEER, 0L);
196: curl_easy_setopt(ch, CURLOPT_SSL_VERIFYHOST, 0L);
197: curl_easy_setopt(ch, CURLOPT_URL, "https://www.example.com/");
198: curl_easy_setopt(ch, CURLOPT_SSLKEYTYPE, "PEM");
199:
200: /* first try: retrieve page without user certificate and key -> will fail
201: */
202: rv = curl_easy_perform(ch);
203: if(rv == CURLE_OK) {
204: printf("*** transfer succeeded ***\n");
205: }
206: else {
207: printf("*** transfer failed ***\n");
208: }
209:
210: /* second try: retrieve page using user certificate and key -> will succeed
211: * load the certificate and key by installing a function doing the necessary
212: * "modifications" to the SSL CONTEXT just before link init
213: */
214: curl_easy_setopt(ch, CURLOPT_SSL_CTX_FUNCTION, *sslctx_function);
215: rv = curl_easy_perform(ch);
216: if(rv == CURLE_OK) {
217: printf("*** transfer succeeded ***\n");
218: }
219: else {
220: printf("*** transfer failed ***\n");
221: }
222:
223: curl_easy_cleanup(ch);
224: curl_global_cleanup();
225: return rv;
226: }
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