doc/examples/print-ciphersuites.c

   1 /* This example code is placed in the public domain. */
   2
   3 #include <config.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <gnutls/gnutls.h>
   8
   9 static void
  10 print_cipher_suite_list (const char* priorities)
  11 {
  12     size_t i;
  13     int ret;
  14     unsigned int idx;
  15     const char *name;
  16     const char *err;
  17     unsigned char id[2];
  18     gnutls_protocol_t version;
  19     gnutls_priority_t pcache;
  20
  21     if (priorities != NULL)
  22       {
  23         printf ("Cipher suites for %s\n", priorities);
  24
  25         ret = gnutls_priority_init(&pcache, priorities, &err);
  26         if (ret < 0)
  27           {
  28             fprintf (stderr, "Syntax error at: %s\n", err);
  29             exit(1);
  30           }
  31
  32         for (i=0;;i++)
  33           {
  34             ret = gnutls_priority_get_cipher_suite_index(pcache, i, &idx);
  35             if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE) break;
  36             if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE) continue;
  37
  38             name = gnutls_cipher_suite_info(idx, id, NULL, NULL, NULL, &version);
  39
  40             if (name != NULL)
  41               printf ("%-50s\t0x%02x, 0x%02x\t%s\n",
  42                       name, (unsigned char) id[0], (unsigned char) id[1],
  43                       gnutls_protocol_get_name (version));
  44           }
  45
  46         return;
  47       }
  48 }
  49
  50 int main(int argc, char** argv)
  51 {
  52   if (argc > 1)
  53     print_cipher_suite_list (argv[1]);
  54 }