GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/openssl/dh.c Lines: 48 106 45.3 %
Date: 2017-11-13 Branches: 29 65 44.6 %

Line Branch Exec Source
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/* $OpenBSD: dh.c,v 1.9 2017/01/20 08:57:11 deraadt Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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 * All rights reserved.
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 *
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 * This package is an SSL implementation written
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 * by Eric Young (eay@cryptsoft.com).
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 * The implementation was written so as to conform with Netscapes SSL.
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 *
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 * This library is free for commercial and non-commercial use as long as
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 * the following conditions are aheared to.  The following conditions
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 * apply to all code found in this distribution, be it the RC4, RSA,
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 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
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 * included with this distribution is covered by the same copyright terms
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 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
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 *
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 * Copyright remains Eric Young's, and as such any Copyright notices in
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 * the code are not to be removed.
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 * If this package is used in a product, Eric Young should be given attribution
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 * as the author of the parts of the library used.
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 * This can be in the form of a textual message at program startup or
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 * in documentation (online or textual) provided with the package.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. All advertising materials mentioning features or use of this software
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 *    must display the following acknowledgement:
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 *    "This product includes cryptographic software written by
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 *     Eric Young (eay@cryptsoft.com)"
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 *    The word 'cryptographic' can be left out if the rouines from the library
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 *    being used are not cryptographic related :-).
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 * 4. If you include any Windows specific code (or a derivative thereof) from
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 *    the apps directory (application code) you must include an acknowledgement:
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 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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 *
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 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 *
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 * The licence and distribution terms for any publically available version or
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 * derivative of this code cannot be changed.  i.e. this code cannot simply be
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 * copied and put under another distribution licence
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 * [including the GNU Public Licence.]
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 */
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#include <openssl/opensslconf.h>	/* for OPENSSL_NO_DH */
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#ifndef OPENSSL_NO_DH
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include "apps.h"
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#include <openssl/bio.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/dh.h>
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#include <openssl/pem.h>
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#include <openssl/x509.h>
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77
static struct {
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	int C;
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	int check;
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	char *infile;
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	int informat;
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	int noout;
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	char *outfile;
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	int outformat;
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	int text;
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} dh_config;
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static struct option dh_options[] = {
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	{
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		.name = "C",
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		.desc = "Convert DH parameters into C code",
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		.type = OPTION_FLAG,
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		.opt.flag = &dh_config.C,
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	},
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	{
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		.name = "check",
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		.desc = "Check the DH parameters",
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		.type = OPTION_FLAG,
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		.opt.flag = &dh_config.check,
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	},
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	{
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		.name = "in",
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		.argname = "file",
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		.desc = "Input file (default stdin)",
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		.type = OPTION_ARG,
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		.opt.arg = &dh_config.infile,
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	},
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	{
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		.name = "inform",
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		.argname = "format",
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		.desc = "Input format (DER or PEM (default))",
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		.type = OPTION_ARG_FORMAT,
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		.opt.value = &dh_config.informat,
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	},
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	{
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		.name = "noout",
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		.desc = "No output",
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		.type = OPTION_FLAG,
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		.opt.flag = &dh_config.noout,
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	},
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	{
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		.name = "out",
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		.argname = "file",
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		.desc = "Output file (default stdout)",
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		.type = OPTION_ARG,
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		.opt.arg = &dh_config.outfile,
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	},
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	{
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		.name = "outform",
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		.argname = "format",
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		.desc = "Output format (DER or PEM (default))",
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		.type = OPTION_ARG_FORMAT,
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		.opt.value = &dh_config.outformat,
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	},
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	{
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		.name = "text",
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		.desc = "Print a text form of the DH parameters",
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		.type = OPTION_FLAG,
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		.opt.flag = &dh_config.text,
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	},
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	{ NULL },
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};
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static void
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dh_usage(void)
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{
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8
	fprintf(stderr,
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	    "usage: dh [-C] [-check] [-in file] [-inform format]\n"
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	    "    [-noout] [-out file] [-outform format] [-text]\n\n");
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4
	options_usage(dh_options);
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4
}
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153
int
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dh_main(int argc, char **argv)
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{
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	DH *dh = NULL;
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	int i;
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	BIO *in = NULL, *out = NULL;
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	int ret = 1;
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161
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	if (single_execution) {
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8
		if (pledge("stdio cpath wpath rpath flock", NULL) == -1) {
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			perror("pledge");
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			exit(1);
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		}
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	}
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168
8
	memset(&dh_config, 0, sizeof(dh_config));
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170
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	dh_config.informat = FORMAT_PEM;
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	dh_config.outformat = FORMAT_PEM;
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173
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	if (options_parse(argc, argv, dh_options, NULL, NULL) != 0) {
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4
		dh_usage();
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4
		goto end;
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	}
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	in = BIO_new(BIO_s_file());
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4
	out = BIO_new(BIO_s_file());
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4
	if (in == NULL || out == NULL) {
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		ERR_print_errors(bio_err);
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		goto end;
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	}
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4
	if (dh_config.infile == NULL)
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		BIO_set_fp(in, stdin, BIO_NOCLOSE);
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	else {
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4
		if (BIO_read_filename(in, dh_config.infile) <= 0) {
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			perror(dh_config.infile);
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			goto end;
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		}
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	}
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4
	if (dh_config.outfile == NULL) {
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		BIO_set_fp(out, stdout, BIO_NOCLOSE);
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	} else {
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4
		if (BIO_write_filename(out, dh_config.outfile) <= 0) {
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			perror(dh_config.outfile);
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			goto end;
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		}
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	}
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201
4
	if (dh_config.informat == FORMAT_ASN1)
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		dh = d2i_DHparams_bio(in, NULL);
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4
	else if (dh_config.informat == FORMAT_PEM)
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4
		dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
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	else {
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		BIO_printf(bio_err, "bad input format specified\n");
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		goto end;
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	}
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4
	if (dh == NULL) {
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		BIO_printf(bio_err, "unable to load DH parameters\n");
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		ERR_print_errors(bio_err);
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		goto end;
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	}
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4
	if (dh_config.text) {
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4
		DHparams_print(out, dh);
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4
	}
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	if (dh_config.check) {
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		if (!DH_check(dh, &i)) {
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			ERR_print_errors(bio_err);
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			goto end;
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		}
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4
		if (i & DH_CHECK_P_NOT_PRIME)
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			printf("p value is not prime\n");
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		if (i & DH_CHECK_P_NOT_SAFE_PRIME)
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			printf("p value is not a safe prime\n");
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		if (i & DH_UNABLE_TO_CHECK_GENERATOR)
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			printf("unable to check the generator value\n");
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		if (i & DH_NOT_SUITABLE_GENERATOR)
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			printf("the g value is not a generator\n");
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4
		if (i == 0)
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			printf("DH parameters appear to be ok.\n");
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	}
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4
	if (dh_config.C) {
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		unsigned char *data;
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		int len, l, bits;
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		len = BN_num_bytes(dh->p);
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		bits = BN_num_bits(dh->p);
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		data = malloc(len);
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		if (data == NULL) {
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			perror("malloc");
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			goto end;
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		}
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		l = BN_bn2bin(dh->p, data);
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		printf("static unsigned char dh%d_p[] = {", bits);
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		for (i = 0; i < l; i++) {
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			if ((i % 12) == 0)
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				printf("\n\t");
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			printf("0x%02X, ", data[i]);
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		}
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		printf("\n\t};\n");
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		l = BN_bn2bin(dh->g, data);
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		printf("static unsigned char dh%d_g[] = {", bits);
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		for (i = 0; i < l; i++) {
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			if ((i % 12) == 0)
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				printf("\n\t");
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			printf("0x%02X, ", data[i]);
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		}
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		printf("\n\t};\n\n");
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		printf("DH *get_dh%d()\n\t{\n", bits);
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		printf("\tDH *dh;\n\n");
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		printf("\tif ((dh = DH_new()) == NULL) return(NULL);\n");
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		printf("\tdh->p = BN_bin2bn(dh%d_p, sizeof(dh%d_p), NULL);\n",
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		    bits, bits);
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		printf("\tdh->g = BN_bin2bn(dh%d_g, sizeof(dh%d_g), NULL);\n",
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		    bits, bits);
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		printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
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		printf("\t\treturn(NULL);\n");
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		printf("\treturn(dh);\n\t}\n");
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		free(data);
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	}
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4
	if (!dh_config.noout) {
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4
		if (dh_config.outformat == FORMAT_ASN1)
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			i = i2d_DHparams_bio(out, dh);
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4
		else if (dh_config.outformat == FORMAT_PEM)
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4
			i = PEM_write_bio_DHparams(out, dh);
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		else {
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			BIO_printf(bio_err, "bad output format specified for outfile\n");
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			goto end;
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		}
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4
		if (!i) {
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			BIO_printf(bio_err, "unable to write DH parameters\n");
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			ERR_print_errors(bio_err);
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			goto end;
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		}
288
	}
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4
	ret = 0;
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291
end:
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8
	BIO_free(in);
293
8
	if (out != NULL)
294
4
		BIO_free_all(out);
295
8
	if (dh != NULL)
296
4
		DH_free(dh);
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298
8
	return (ret);
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8
}
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#endif