/* $OpenBSD$ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "apps.h"

#include <openssl/err.h>
#include <openssl/ssl.h>

static const char *ciphers_usage[] = {
	"usage: ciphers args\n",
	" -v          - verbose mode, a textual listing of the SSL/TLS ciphers in OpenSSL\n",
	" -V          - even more verbose\n",
	" -ssl3       - SSL3 mode\n",
	" -tls1       - TLS1 mode\n",
	NULL
};

int ciphers_main(int, char **);

int
ciphers_main(int argc, char **argv)
{
	int ret = 1, i;
	int verbose = 0, Verbose = 0;
	const char **pp;
	const char *p;
	int badops = 0;
	SSL_CTX *ctx = NULL;
	SSL *ssl = NULL;
	char *ciphers = NULL;
	const SSL_METHOD *meth = NULL;
	STACK_OF(SSL_CIPHER) * sk;
	char buf[512];
	BIO *STDout = NULL;

	meth = SSLv3_server_method();

	STDout = BIO_new_fp(stdout, BIO_NOCLOSE);
	if (!load_config(bio_err, NULL))
		goto end;

	argc--;
	argv++;
	while (argc >= 1) {
		if (strcmp(*argv, "-v") == 0)
			verbose = 1;
		else if (strcmp(*argv, "-V") == 0)
			verbose = Verbose = 1;
		else if (strcmp(*argv, "-ssl3") == 0)
			meth = SSLv3_client_method();
		else if (strcmp(*argv, "-tls1") == 0)
			meth = TLSv1_client_method();
		else if ((strncmp(*argv, "-h", 2) == 0) ||
		    (strcmp(*argv, "-?") == 0)) {
			badops = 1;
			break;
		} else {
			ciphers = *argv;
		}
		argc--;
		argv++;
	}

	if (badops) {
		for (pp = ciphers_usage; (*pp != NULL); pp++)
			BIO_printf(bio_err, "%s", *pp);
		goto end;
	}
	OpenSSL_add_ssl_algorithms();

	ctx = SSL_CTX_new(meth);
	if (ctx == NULL)
		goto err;
	if (ciphers != NULL) {
		if (!SSL_CTX_set_cipher_list(ctx, ciphers)) {
			BIO_printf(bio_err, "Error in cipher list\n");
			goto err;
		}
	}
	ssl = SSL_new(ctx);
	if (ssl == NULL)
		goto err;


	if (!verbose) {
		for (i = 0; ; i++) {
			p = SSL_get_cipher_list(ssl, i);
			if (p == NULL)
				break;
			if (i != 0)
				BIO_printf(STDout, ":");
			BIO_printf(STDout, "%s", p);
		}
		BIO_printf(STDout, "\n");
	} else {		/* verbose */
		sk = SSL_get_ciphers(ssl);

		for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) {
			SSL_CIPHER *c;

			c = sk_SSL_CIPHER_value(sk, i);

			if (Verbose) {
				unsigned long id = SSL_CIPHER_get_id(c);
				int id0 = (int) (id >> 24);
				int id1 = (int) ((id >> 16) & 0xffL);
				int id2 = (int) ((id >> 8) & 0xffL);
				int id3 = (int) (id & 0xffL);

				if ((id & 0xff000000L) == 0x02000000L)
					BIO_printf(STDout, "     0x%02X,0x%02X,0x%02X - ", id1, id2, id3);	/* SSL2 cipher */
				else if ((id & 0xff000000L) == 0x03000000L)
					BIO_printf(STDout, "          0x%02X,0x%02X - ", id2, id3);	/* SSL3 cipher */
				else
					BIO_printf(STDout, "0x%02X,0x%02X,0x%02X,0x%02X - ", id0, id1, id2, id3);	/* whatever */
			}
			BIO_puts(STDout,
			    SSL_CIPHER_description(c, buf, sizeof buf));
		}
	}

	ret = 0;
	if (0) {
err:
		SSL_load_error_strings();
		ERR_print_errors(bio_err);
	}

end:
	if (ctx != NULL)
		SSL_CTX_free(ctx);
	if (ssl != NULL)
		SSL_free(ssl);
	if (STDout != NULL)
		BIO_free_all(STDout);
	
	return (ret);
}