docs/examples/usercertinmem.c

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