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<title>GnuTLS 3.5.3: Listing the ciphersuites in a priority string</title>
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<a name="Listing-the-ciphersuites-in-a-priority-string"></a>
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Next: <a href="PKCS12-structure-generation-example.html#PKCS12-structure-generation-example" accesskey="n" rel="next">PKCS12 structure generation example</a>, Previous: <a href="X_002e509-certificate-parsing-example.html#X_002e509-certificate-parsing-example" accesskey="p" rel="prev">X.509 certificate parsing example</a>, Up: <a href="Miscellaneous-examples.html#Miscellaneous-examples" accesskey="u" rel="up">Miscellaneous examples</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p>
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<hr>
<a name="Listing-the-ciphersuites-in-a-priority-string-1"></a>
<h4 class="subsection">7.4.3 Listing the ciphersuites in a priority string</h4>
<p>This is a small program to list the enabled ciphersuites by a
priority string.
</p>
<pre class="verbatim">/* This example code is placed in the public domain. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gnutls/gnutls.h>
static void print_cipher_suite_list(const char *priorities)
{
size_t i;
int ret;
unsigned int idx;
const char *name;
const char *err;
unsigned char id[2];
gnutls_protocol_t version;
gnutls_priority_t pcache;
if (priorities != NULL) {
printf("Cipher suites for %s\n", priorities);
ret = gnutls_priority_init(&pcache, priorities, &err);
if (ret < 0) {
fprintf(stderr, "Syntax error at: %s\n", err);
exit(1);
}
for (i = 0;; i++) {
ret =
gnutls_priority_get_cipher_suite_index(pcache,
i,
&idx);
if (ret == GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE)
break;
if (ret == GNUTLS_E_UNKNOWN_CIPHER_SUITE)
continue;
name =
gnutls_cipher_suite_info(idx, id, NULL, NULL,
NULL, &version);
if (name != NULL)
printf("%-50s\t0x%02x, 0x%02x\t%s\n",
name, (unsigned char) id[0],
(unsigned char) id[1],
gnutls_protocol_get_name(version));
}
return;
}
}
int main(int argc, char **argv)
{
if (argc > 1)
print_cipher_suite_list(argv[1]);
return 0;
}
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