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/* $OpenBSD: ciphers.c,v 1.9 2018/02/07 05:47:55 jsing Exp $ */
/*
* Copyright (c) 2014 Joel Sing <jsing@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
#include "apps.h"
#include "progs.h"
struct {
int usage;
int verbose;
} ciphers_config;
struct option ciphers_options[] = {
{
.name = "h",
.type = OPTION_FLAG,
.opt.flag = &ciphers_config.usage,
},
{
.name = "?",
.type = OPTION_FLAG,
.opt.flag = &ciphers_config.usage,
},
{
.name = "tls1",
.desc = "This option is deprecated since it is the default",
.type = OPTION_DISCARD,
},
{
.name = "v",
.desc = "Provide cipher listing",
.type = OPTION_VALUE,
.opt.value = &ciphers_config.verbose,
.value = 1,
},
{
.name = "V",
.desc = "Provide cipher listing with cipher suite values",
.type = OPTION_VALUE,
.opt.value = &ciphers_config.verbose,
.value = 2,
},
{ NULL },
};
static void
ciphers_usage(void)
{
fprintf(stderr, "usage: ciphers [-hVv] [-tls1] [cipherlist]\n");
options_usage(ciphers_options);
}
int
ciphers_main(int argc, char **argv)
{
char *cipherlist = NULL;
STACK_OF(SSL_CIPHER) *ciphers;
const SSL_CIPHER *cipher;
SSL_CTX *ssl_ctx = NULL;
SSL *ssl = NULL;
uint16_t value;
int i, rv = 0;
char *desc;
if (single_execution) {
if (pledge("stdio rpath", NULL) == -1) {
perror("pledge");
exit(1);
}
}
memset(&ciphers_config, 0, sizeof(ciphers_config));
if (options_parse(argc, argv, ciphers_options, &cipherlist,
NULL) != 0) {
ciphers_usage();
return (1);
}
if (ciphers_config.usage) {
ciphers_usage();
return (1);
}
if ((ssl_ctx = SSL_CTX_new(TLSv1_client_method())) == NULL)
goto err;
if (cipherlist != NULL) {
if (SSL_CTX_set_cipher_list(ssl_ctx, cipherlist) == 0)
goto err;
}
if ((ssl = SSL_new(ssl_ctx)) == NULL)
goto err;
if ((ciphers = SSL_get_ciphers(ssl)) == NULL)
goto err;
for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++) {
cipher = sk_SSL_CIPHER_value(ciphers, i);
if (ciphers_config.verbose == 0) {
fprintf(stdout, "%s%s", (i ? ":" : ""),
SSL_CIPHER_get_name(cipher));
continue;
}
if (ciphers_config.verbose > 1) {
value = SSL_CIPHER_get_value(cipher);
fprintf(stdout, "%-*s0x%02X,0x%02X - ", 10, "",
((value >> 8) & 0xff), (value & 0xff));
}
desc = SSL_CIPHER_description(cipher, NULL, 0);
if (strcmp(desc, "OPENSSL_malloc Error") == 0) {
fprintf(stderr, "out of memory\n");
goto err;
}
fprintf(stdout, "%s", desc);
free(desc);
}
if (ciphers_config.verbose == 0)
fprintf(stdout, "\n");
goto done;
err:
ERR_print_errors_fp(stderr);
rv = 1;
done:
SSL_CTX_free(ssl_ctx);
SSL_free(ssl);
return (rv);
}
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