Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/openssl/ecparam.c	Lines:	169	243	69.5 %
Date:	2017-11-07	Branches:	80	153	52.3 %


/* $OpenBSD: ecparam.c,v 1.16 2017/01/20 08:57:12 deraadt Exp $ */
/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */
/* ====================================================================
 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 *
 * Portions of the attached software ("Contribution") are developed by
 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
 *
 * The Contribution is licensed pursuant to the OpenSSL open source
 * license provided above.
 *
 * The elliptic curve binary polynomial software is originally written by
 * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
 *
 */

#include <openssl/opensslconf.h>

#ifndef OPENSSL_NO_EC

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

#include "apps.h"

#include <openssl/bio.h>
#include <openssl/bn.h>
#include <openssl/ec.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>

static int ecparam_print_var(BIO *, BIGNUM *, const char *, int,
    unsigned char *);

static struct {
	int C;
	int asn1_flag;
	int check;
	char *curve_name;
	point_conversion_form_t form;
	int genkey;
	char *infile;
	int informat;
	int list_curves;
	int new_asn1_flag;
	int new_form;
	int no_seed;
	int noout;
	char *outfile;
	int outformat;
	int text;
} ecparam_config;

static int
ecparam_opt_form(char *arg)
{
	if (strcmp(arg, "compressed") == 0)
		ecparam_config.form = POINT_CONVERSION_COMPRESSED;
	else if (strcmp(arg, "uncompressed") == 0)
		ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
	else if (strcmp(arg, "hybrid") == 0)
		ecparam_config.form = POINT_CONVERSION_HYBRID;
	else
		return (1);

	ecparam_config.new_form = 1;
	return (0);
}

static int
ecparam_opt_enctype(char *arg)
{
	if (strcmp(arg, "explicit") == 0)
		ecparam_config.asn1_flag = 0;
	else if (strcmp(arg, "named_curve") == 0)
		ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
	else
		return (1);

	ecparam_config.new_asn1_flag = 1;
	return (0);
}

struct option ecparam_options[] = {
	{
		.name = "C",
		.desc = "Convert the EC parameters into C code",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.C,
	},
	{
		.name = "check",
		.desc = "Validate the elliptic curve parameters",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.check,
	},
	{
		.name = "conv_form",
		.argname = "form",
		.desc = "Specify point conversion form:\n"
		    "  compressed, uncompressed (default), hybrid",
		.type = OPTION_ARG_FUNC,
		.opt.argfunc = ecparam_opt_form,
	},
	{
		.name = "genkey",
		.desc = "Generate an EC private key using the specified "
		    "parameters",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.genkey,
	},
	{
		.name = "in",
		.argname = "file",
		.desc = "Input file to read parameters from (default stdin)",
		.type = OPTION_ARG,
		.opt.arg = &ecparam_config.infile,
	},
	{
		.name = "inform",
		.argname = "format",
		.desc = "Input format (DER or PEM)",
		.type = OPTION_ARG_FORMAT,
		.opt.value = &ecparam_config.informat,
	},
	{
		.name = "list_curves",
		.desc = "Print list of all currently implemented EC "
		    "parameter names",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.list_curves,
	},
	{
		.name = "name",
		.argname = "curve",
		.desc = "Use the EC parameters with the specified name",
		.type = OPTION_ARG,
		.opt.arg = &ecparam_config.curve_name,
	},
	{
		.name = "no_seed",
		.desc = "Do not output seed with explicit parameter encoding",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.no_seed,
	},
	{
		.name = "noout",
		.desc = "Do not output encoded version of EC parameters",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.noout,
	},
	{
		.name = "out",
		.argname = "file",
		.desc = "Output file to write parameters to (default stdout)",
		.type = OPTION_ARG,
		.opt.arg = &ecparam_config.outfile,
	},
	{
		.name = "outform",
		.argname = "format",
		.desc = "Output format (DER or PEM)",
		.type = OPTION_ARG_FORMAT,
		.opt.value = &ecparam_config.outformat,
	},
	{
		.name = "param_enc",
		.argname = "type",
		.desc = "Specify EC parameter ASN.1 encoding type:\n"
		    "  explicit, named_curve (default)",
		.type = OPTION_ARG_FUNC,
		.opt.argfunc = ecparam_opt_enctype,
	},
	{
		.name = "text",
		.desc = "Print out the EC parameters in human readable form",
		.type = OPTION_FLAG,
		.opt.flag = &ecparam_config.text,
	},
	{NULL},
};

static void
ecparam_usage(void)
{
	fprintf(stderr, "usage: ecparam [-C] [-check] [-conv_form arg] "
	    " [-genkey]\n"
	    "    [-in file] [-inform DER | PEM] [-list_curves] [-name arg]\n"
	    "    [-no_seed] [-noout] [-out file] [-outform DER | PEM]\n"
	    "    [-param_enc arg] [-text]\n\n");
	options_usage(ecparam_options);
}

int
ecparam_main(int argc, char **argv)
{
	BIGNUM *ec_p = NULL, *ec_a = NULL, *ec_b = NULL, *ec_gen = NULL;
	BIGNUM *ec_order = NULL, *ec_cofactor = NULL;
	EC_GROUP *group = NULL;
	unsigned char *buffer = NULL;
	BIO *in = NULL, *out = NULL;
	int i, ret = 1;

	if (single_execution) {
		if (pledge("stdio cpath wpath rpath flock", NULL) == -1) {
			perror("pledge");
			exit(1);
		}
	}

	memset(&ecparam_config, 0, sizeof(ecparam_config));
	ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
	ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
	ecparam_config.informat = FORMAT_PEM;
	ecparam_config.outformat = FORMAT_PEM;

	if (options_parse(argc, argv, ecparam_options, NULL, NULL) != 0) {
		ecparam_usage();
		goto end;
	}

	in = BIO_new(BIO_s_file());
	out = BIO_new(BIO_s_file());
	if ((in == NULL) || (out == NULL)) {
		ERR_print_errors(bio_err);
		goto end;
	}
	if (ecparam_config.infile == NULL)
		BIO_set_fp(in, stdin, BIO_NOCLOSE);
	else {
		if (BIO_read_filename(in, ecparam_config.infile) <= 0) {
			perror(ecparam_config.infile);
			goto end;
		}
	}
	if (ecparam_config.outfile == NULL) {
		BIO_set_fp(out, stdout, BIO_NOCLOSE);
	} else {
		if (BIO_write_filename(out, ecparam_config.outfile) <= 0) {
			perror(ecparam_config.outfile);
			goto end;
		}
	}

	if (ecparam_config.list_curves) {
		EC_builtin_curve *curves = NULL;
		size_t crv_len = 0;
		size_t n = 0;

		crv_len = EC_get_builtin_curves(NULL, 0);

		curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve));
		if (curves == NULL)
			goto end;

		if (!EC_get_builtin_curves(curves, crv_len)) {
			free(curves);
			goto end;
		}
		for (n = 0; n < crv_len; n++) {
			const char *comment;
			const char *sname;
			comment = curves[n].comment;
			sname = OBJ_nid2sn(curves[n].nid);
			if (comment == NULL)
				comment = "CURVE DESCRIPTION NOT AVAILABLE";
			if (sname == NULL)
				sname = "";

			BIO_printf(out, "  %-10s: ", sname);
			BIO_printf(out, "%s\n", comment);
		}

		free(curves);
		ret = 0;
		goto end;
	}
	if (ecparam_config.curve_name != NULL) {
		int nid;

		/*
		 * workaround for the SECG curve names secp192r1 and
		 * secp256r1 (which are the same as the curves prime192v1 and
		 * prime256v1 defined in X9.62)
		 */
		if (!strcmp(ecparam_config.curve_name, "secp192r1")) {
			BIO_printf(bio_err, "using curve name prime192v1 "
			    "instead of secp192r1\n");
			nid = NID_X9_62_prime192v1;
		} else if (!strcmp(ecparam_config.curve_name, "secp256r1")) {
			BIO_printf(bio_err, "using curve name prime256v1 "
			    "instead of secp256r1\n");
			nid = NID_X9_62_prime256v1;
		} else
			nid = OBJ_sn2nid(ecparam_config.curve_name);

		if (nid == 0)
			nid = EC_curve_nist2nid(ecparam_config.curve_name);

		if (nid == 0) {
			BIO_printf(bio_err, "unknown curve name (%s)\n",
			    ecparam_config.curve_name);
			goto end;
		}
		group = EC_GROUP_new_by_curve_name(nid);
		if (group == NULL) {
			BIO_printf(bio_err, "unable to create curve (%s)\n",
			    ecparam_config.curve_name);
			goto end;
		}
		EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);
		EC_GROUP_set_point_conversion_form(group, ecparam_config.form);
	} else if (ecparam_config.informat == FORMAT_ASN1) {
		group = d2i_ECPKParameters_bio(in, NULL);
	} else if (ecparam_config.informat == FORMAT_PEM) {
		group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
	} else {
		BIO_printf(bio_err, "bad input format specified\n");
		goto end;
	}

	if (group == NULL) {
		BIO_printf(bio_err,
		    "unable to load elliptic curve parameters\n");
		ERR_print_errors(bio_err);
		goto end;
	}
	if (ecparam_config.new_form)
		EC_GROUP_set_point_conversion_form(group, ecparam_config.form);

	if (ecparam_config.new_asn1_flag)
		EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);

	if (ecparam_config.no_seed)
		EC_GROUP_set_seed(group, NULL, 0);

	if (ecparam_config.text) {
		if (!ECPKParameters_print(out, group, 0))
			goto end;
	}
	if (ecparam_config.check) {
		BIO_printf(bio_err, "checking elliptic curve parameters: ");
		if (!EC_GROUP_check(group, NULL)) {
			BIO_printf(bio_err, "failed\n");
			ERR_print_errors(bio_err);
		} else
			BIO_printf(bio_err, "ok\n");

	}
	if (ecparam_config.C) {
		size_t buf_len = 0, tmp_len = 0;
		const EC_POINT *point;
		int is_prime, len = 0;
		const EC_METHOD *meth = EC_GROUP_method_of(group);

		if ((ec_p = BN_new()) == NULL || (ec_a = BN_new()) == NULL ||
		    (ec_b = BN_new()) == NULL || (ec_gen = BN_new()) == NULL ||
		    (ec_order = BN_new()) == NULL ||
		    (ec_cofactor = BN_new()) == NULL) {
			perror("malloc");
			goto end;
		}
		is_prime = (EC_METHOD_get_field_type(meth) ==
		    NID_X9_62_prime_field);

		if (is_prime) {
			if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
			    ec_b, NULL))
				goto end;
		} else {
			if (!EC_GROUP_get_curve_GF2m(group, ec_p, ec_a,
			    ec_b, NULL))
				goto end;
		}

		if ((point = EC_GROUP_get0_generator(group)) == NULL)
			goto end;
		if (!EC_POINT_point2bn(group, point,
			EC_GROUP_get_point_conversion_form(group), ec_gen,
			NULL))
			goto end;
		if (!EC_GROUP_get_order(group, ec_order, NULL))
			goto end;
		if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
			goto end;

		len = BN_num_bits(ec_order);

		if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len)
			buf_len = tmp_len;
		if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len)
			buf_len = tmp_len;
		if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len)
			buf_len = tmp_len;
		if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len)
			buf_len = tmp_len;
		if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len)
			buf_len = tmp_len;
		if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len)
			buf_len = tmp_len;

		buffer = malloc(buf_len);

		if (buffer == NULL) {
			perror("malloc");
			goto end;
		}
		ecparam_print_var(out, ec_p, "ec_p", len, buffer);
		ecparam_print_var(out, ec_a, "ec_a", len, buffer);
		ecparam_print_var(out, ec_b, "ec_b", len, buffer);
		ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
		ecparam_print_var(out, ec_order, "ec_order", len, buffer);
		ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
		    buffer);

		BIO_printf(out, "\n\n");

		BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
		BIO_printf(out, "\tint ok=0;\n");
		BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
		BIO_printf(out, "\tEC_POINT *point = NULL;\n");
		BIO_printf(out, "\tBIGNUM   *tmp_1 = NULL, *tmp_2 = NULL, "
		    "*tmp_3 = NULL;\n\n");
		BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
		    "sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
		    "goto err;\n", len, len);
		BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
		    "sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
		    "goto err;\n", len, len);
		BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
		    "sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
		    "goto err;\n", len, len);
		if (is_prime) {
			BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
			    "GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
			    "\n\t\tgoto err;\n\n");
		} else {
			BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
			    "GF2m(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
			    "\n\t\tgoto err;\n\n");
		}
		BIO_printf(out, "\t/* build generator */\n");
		BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
		    "sizeof(ec_gen_%d), tmp_1)) == NULL)"
		    "\n\t\tgoto err;\n", len, len);
		BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
		    "NULL, NULL);\n");
		BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
		BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
		    "sizeof(ec_order_%d), tmp_2)) == NULL)"
		    "\n\t\tgoto err;\n", len, len);
		BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
		    "sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
		    "\n\t\tgoto err;\n", len, len);
		BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
		    " tmp_2, tmp_3))\n\t\tgoto err;\n");
		BIO_printf(out, "\n\tok=1;\n");
		BIO_printf(out, "err:\n");
		BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
		BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
		BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
		BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
		BIO_printf(out, "\tif (!ok)\n");
		BIO_printf(out, "\t\t{\n");
		BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
		BIO_printf(out, "\t\tgroup = NULL;\n");
		BIO_printf(out, "\t\t}\n");
		BIO_printf(out, "\treturn(group);\n\t}\n");
	}
	if (!ecparam_config.noout) {
		if (ecparam_config.outformat == FORMAT_ASN1)
			i = i2d_ECPKParameters_bio(out, group);
		else if (ecparam_config.outformat == FORMAT_PEM)
			i = PEM_write_bio_ECPKParameters(out, group);
		else {
			BIO_printf(bio_err, "bad output format specified for"
			    " outfile\n");
			goto end;
		}
		if (!i) {
			BIO_printf(bio_err, "unable to write elliptic "
			    "curve parameters\n");
			ERR_print_errors(bio_err);
			goto end;
		}
	}
	if (ecparam_config.genkey) {
		EC_KEY *eckey = EC_KEY_new();

		if (eckey == NULL)
			goto end;

		if (EC_KEY_set_group(eckey, group) == 0) {
			EC_KEY_free(eckey);
			goto end;
		}

		if (!EC_KEY_generate_key(eckey)) {
			EC_KEY_free(eckey);
			goto end;
		}
		if (ecparam_config.outformat == FORMAT_ASN1)
			i = i2d_ECPrivateKey_bio(out, eckey);
		else if (ecparam_config.outformat == FORMAT_PEM)
			i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
			    NULL, 0, NULL, NULL);
		else {
			BIO_printf(bio_err, "bad output format specified "
			    "for outfile\n");
			EC_KEY_free(eckey);
			goto end;
		}
		EC_KEY_free(eckey);
	}
	ret = 0;

end:
	BN_free(ec_p);
	BN_free(ec_a);
	BN_free(ec_b);
	BN_free(ec_gen);
	BN_free(ec_order);
	BN_free(ec_cofactor);

	free(buffer);

	BIO_free(in);
	BIO_free_all(out);
	EC_GROUP_free(group);

	return (ret);
}

static int
ecparam_print_var(BIO * out, BIGNUM * in, const char *var,
    int len, unsigned char *buffer)
{
	BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
	if (BN_is_zero(in))
		BIO_printf(out, "\n\t0x00");
	else {
		int i, l;

		l = BN_bn2bin(in, buffer);
		for (i = 0; i < l - 1; i++) {
			if ((i % 12) == 0)
				BIO_printf(out, "\n\t");
			BIO_printf(out, "0x%02X,", buffer[i]);
		}
		if ((i % 12) == 0)
			BIO_printf(out, "\n\t");
		BIO_printf(out, "0x%02X", buffer[i]);
	}
	BIO_printf(out, "\n\t};\n\n");
	return 1;
}
#endif


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: ecparam.c,v 1.16 2017/01/20 08:57:12 deraadt Exp $ */
2			/*
3			* Written by Nils Larsch for the OpenSSL project.
4			*/
5			/* ====================================================================
6			* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			*
12			* 1. Redistributions of source code must retain the above copyright
13			* notice, this list of conditions and the following disclaimer.
14			*
15			* 2. Redistributions in binary form must reproduce the above copyright
16			* notice, this list of conditions and the following disclaimer in
17			* the documentation and/or other materials provided with the
18			* distribution.
19			*
20			* 3. All advertising materials mentioning features or use of this
21			* software must display the following acknowledgment:
22			* "This product includes software developed by the OpenSSL Project
23			* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
24			*
25			* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26			* endorse or promote products derived from this software without
27			* prior written permission. For written permission, please contact
28			* openssl-core@openssl.org.
29			*
30			* 5. Products derived from this software may not be called "OpenSSL"
31			* nor may "OpenSSL" appear in their names without prior written
32			* permission of the OpenSSL Project.
33			*
34			* 6. Redistributions of any form whatsoever must retain the following
35			* acknowledgment:
36			* "This product includes software developed by the OpenSSL Project
37			* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
38			*
39			* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40			* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42			* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43			* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45			* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46			* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48			* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49			* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50			* OF THE POSSIBILITY OF SUCH DAMAGE.
51			* ====================================================================
52			*
53			* This product includes cryptographic software written by Eric Young
54			* (eay@cryptsoft.com). This product includes software written by Tim
55			* Hudson (tjh@cryptsoft.com).
56			*
57			*/
58			/* ====================================================================
59			* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
60			*
61			* Portions of the attached software ("Contribution") are developed by
62			* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
63			*
64			* The Contribution is licensed pursuant to the OpenSSL open source
65			* license provided above.
66			*
67			* The elliptic curve binary polynomial software is originally written by
68			* Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
69			*
70			*/
71
72			#include <openssl/opensslconf.h>
73
74			#ifndef OPENSSL_NO_EC
75
76			#include <stdio.h>
77			#include <stdlib.h>
78			#include <string.h>
79			#include <time.h>
80
81			#include "apps.h"
82
83			#include <openssl/bio.h>
84			#include <openssl/bn.h>
85			#include <openssl/ec.h>
86			#include <openssl/err.h>
87			#include <openssl/pem.h>
88			#include <openssl/x509.h>
89
90			static int ecparam_print_var(BIO , BIGNUM , const char *, int,
91			unsigned char *);
92
93			static struct {
94			int C;
95			int asn1_flag;
96			int check;
97			char *curve_name;
98			point_conversion_form_t form;
99			int genkey;
100			char *infile;
101			int informat;
102			int list_curves;
103			int new_asn1_flag;
104			int new_form;
105			int no_seed;
106			int noout;
107			char *outfile;
108			int outformat;
109			int text;
110			} ecparam_config;
111
112			static int
113			ecparam_opt_form(char *arg)
114			{
115	✗✓	1440	if (strcmp(arg, "compressed") == 0)
116			ecparam_config.form = POINT_CONVERSION_COMPRESSED;
117			else if (strcmp(arg, "uncompressed") == 0)
118			ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
119			else if (strcmp(arg, "hybrid") == 0)
120			ecparam_config.form = POINT_CONVERSION_HYBRID;
121			else
122			return (1);
123
124		720	ecparam_config.new_form = 1;
125		720	return (0);
126		720	}
127
128			static int
129			ecparam_opt_enctype(char *arg)
130			{
131	✗✓	1440	if (strcmp(arg, "explicit") == 0)
132			ecparam_config.asn1_flag = 0;
133			else if (strcmp(arg, "named_curve") == 0)
134			ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
135			else
136			return (1);
137
138		720	ecparam_config.new_asn1_flag = 1;
139		720	return (0);
140		720	}
141
142			struct option ecparam_options[] = {
143			{
144			.name = "C",
145			.desc = "Convert the EC parameters into C code",
146			.type = OPTION_FLAG,
147			.opt.flag = &ecparam_config.C,
148			},
149			{
150			.name = "check",
151			.desc = "Validate the elliptic curve parameters",
152			.type = OPTION_FLAG,
153			.opt.flag = &ecparam_config.check,
154			},
155			{
156			.name = "conv_form",
157			.argname = "form",
158			.desc = "Specify point conversion form:\n"
159			" compressed, uncompressed (default), hybrid",
160			.type = OPTION_ARG_FUNC,
161			.opt.argfunc = ecparam_opt_form,
162			},
163			{
164			.name = "genkey",
165			.desc = "Generate an EC private key using the specified "
166			"parameters",
167			.type = OPTION_FLAG,
168			.opt.flag = &ecparam_config.genkey,
169			},
170			{
171			.name = "in",
172			.argname = "file",
173			.desc = "Input file to read parameters from (default stdin)",
174			.type = OPTION_ARG,
175			.opt.arg = &ecparam_config.infile,
176			},
177			{
178			.name = "inform",
179			.argname = "format",
180			.desc = "Input format (DER or PEM)",
181			.type = OPTION_ARG_FORMAT,
182			.opt.value = &ecparam_config.informat,
183			},
184			{
185			.name = "list_curves",
186			.desc = "Print list of all currently implemented EC "
187			"parameter names",
188			.type = OPTION_FLAG,
189			.opt.flag = &ecparam_config.list_curves,
190			},
191			{
192			.name = "name",
193			.argname = "curve",
194			.desc = "Use the EC parameters with the specified name",
195			.type = OPTION_ARG,
196			.opt.arg = &ecparam_config.curve_name,
197			},
198			{
199			.name = "no_seed",
200			.desc = "Do not output seed with explicit parameter encoding",
201			.type = OPTION_FLAG,
202			.opt.flag = &ecparam_config.no_seed,
203			},
204			{
205			.name = "noout",
206			.desc = "Do not output encoded version of EC parameters",
207			.type = OPTION_FLAG,
208			.opt.flag = &ecparam_config.noout,
209			},
210			{
211			.name = "out",
212			.argname = "file",
213			.desc = "Output file to write parameters to (default stdout)",
214			.type = OPTION_ARG,
215			.opt.arg = &ecparam_config.outfile,
216			},
217			{
218			.name = "outform",
219			.argname = "format",
220			.desc = "Output format (DER or PEM)",
221			.type = OPTION_ARG_FORMAT,
222			.opt.value = &ecparam_config.outformat,
223			},
224			{
225			.name = "param_enc",
226			.argname = "type",
227			.desc = "Specify EC parameter ASN.1 encoding type:\n"
228			" explicit, named_curve (default)",
229			.type = OPTION_ARG_FUNC,
230			.opt.argfunc = ecparam_opt_enctype,
231			},
232			{
233			.name = "text",
234			.desc = "Print out the EC parameters in human readable form",
235			.type = OPTION_FLAG,
236			.opt.flag = &ecparam_config.text,
237			},
238			{NULL},
239			};
240
241			static void
242			ecparam_usage(void)
243			{
244		16	fprintf(stderr, "usage: ecparam [-C] [-check] [-conv_form arg] "
245			" [-genkey]\n"
246			" [-in file] [-inform DER \| PEM] [-list_curves] [-name arg]\n"
247			" [-no_seed] [-noout] [-out file] [-outform DER \| PEM]\n"
248			" [-param_enc arg] [-text]\n\n");
249		8	options_usage(ecparam_options);
250		8	}
251
252			int
253			ecparam_main(int argc, char **argv)
254			{
255			BIGNUM ec_p = NULL, ec_a = NULL, ec_b = NULL, ec_gen = NULL;
256			BIGNUM ec_order = NULL, ec_cofactor = NULL;
257			EC_GROUP *group = NULL;
258			unsigned char *buffer = NULL;
259			BIO in = NULL, out = NULL;
260			int i, ret = 1;
261
262	✓✗	1488	if (single_execution) {
263	✗✓	744	if (pledge("stdio cpath wpath rpath flock", NULL) == -1) {
264			perror("pledge");
265			exit(1);
266			}
267			}
268
269		744	memset(&ecparam_config, 0, sizeof(ecparam_config));
270		744	ecparam_config.asn1_flag = OPENSSL_EC_NAMED_CURVE;
271		744	ecparam_config.form = POINT_CONVERSION_UNCOMPRESSED;
272		744	ecparam_config.informat = FORMAT_PEM;
273		744	ecparam_config.outformat = FORMAT_PEM;
274
275	✓✓	744	if (options_parse(argc, argv, ecparam_options, NULL, NULL) != 0) {
276		8	ecparam_usage();
277		8	goto end;
278			}
279
280		736	in = BIO_new(BIO_s_file());
281		736	out = BIO_new(BIO_s_file());
282	✗✓	736	if ((in == NULL) \|\| (out == NULL)) {
283			ERR_print_errors(bio_err);
284			goto end;
285			}
286	✓✗	736	if (ecparam_config.infile == NULL)
287		736	BIO_set_fp(in, stdin, BIO_NOCLOSE);
288			else {
289			if (BIO_read_filename(in, ecparam_config.infile) <= 0) {
290			perror(ecparam_config.infile);
291			goto end;
292			}
293			}
294	✓✓	736	if (ecparam_config.outfile == NULL) {
295		16	BIO_set_fp(out, stdout, BIO_NOCLOSE);
296		16	} else {
297	✗✓	720	if (BIO_write_filename(out, ecparam_config.outfile) <= 0) {
298			perror(ecparam_config.outfile);
299			goto end;
300			}
301			}
302
303	✓✓	736	if (ecparam_config.list_curves) {
304			EC_builtin_curve *curves = NULL;
305			size_t crv_len = 0;
306			size_t n = 0;
307
308		16	crv_len = EC_get_builtin_curves(NULL, 0);
309
310		16	curves = reallocarray(NULL, crv_len, sizeof(EC_builtin_curve));
311	✗✓	16	if (curves == NULL)
312			goto end;
313
314	✗✓	16	if (!EC_get_builtin_curves(curves, crv_len)) {
315			free(curves);
316			goto end;
317			}
318	✓✓	2912	for (n = 0; n < crv_len; n++) {
319			const char *comment;
320			const char *sname;
321		1440	comment = curves[n].comment;
322		1440	sname = OBJ_nid2sn(curves[n].nid);
323	✗✓	1440	if (comment == NULL)
324			comment = "CURVE DESCRIPTION NOT AVAILABLE";
325	✗✓	1440	if (sname == NULL)
326			sname = "";
327
328		1440	BIO_printf(out, " %-10s: ", sname);
329		1440	BIO_printf(out, "%s\n", comment);
330			}
331
332		16	free(curves);
333			ret = 0;
334	✓✗	16	goto end;
335			}
336	✓✗	720	if (ecparam_config.curve_name != NULL) {
337			int nid;
338
339			/*
340			* workaround for the SECG curve names secp192r1 and
341			* secp256r1 (which are the same as the curves prime192v1 and
342			* prime256v1 defined in X9.62)
343			*/
344	✗✓	720	if (!strcmp(ecparam_config.curve_name, "secp192r1")) {
345			BIO_printf(bio_err, "using curve name prime192v1 "
346			"instead of secp192r1\n");
347			nid = NID_X9_62_prime192v1;
348	✗✓	720	} else if (!strcmp(ecparam_config.curve_name, "secp256r1")) {
349			BIO_printf(bio_err, "using curve name prime256v1 "
350			"instead of secp256r1\n");
351			nid = NID_X9_62_prime256v1;
352			} else
353		720	nid = OBJ_sn2nid(ecparam_config.curve_name);
354
355	✗✓	720	if (nid == 0)
356			nid = EC_curve_nist2nid(ecparam_config.curve_name);
357
358	✗✓	720	if (nid == 0) {
359			BIO_printf(bio_err, "unknown curve name (%s)\n",
360			ecparam_config.curve_name);
361			goto end;
362			}
363		720	group = EC_GROUP_new_by_curve_name(nid);
364	✗✓	720	if (group == NULL) {
365			BIO_printf(bio_err, "unable to create curve (%s)\n",
366			ecparam_config.curve_name);
367			goto end;
368			}
369		720	EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);
370		720	EC_GROUP_set_point_conversion_form(group, ecparam_config.form);
371	✓✗✗✗ ✗	720	} else if (ecparam_config.informat == FORMAT_ASN1) {
372			group = d2i_ECPKParameters_bio(in, NULL);
373			} else if (ecparam_config.informat == FORMAT_PEM) {
374			group = PEM_read_bio_ECPKParameters(in, NULL, NULL, NULL);
375			} else {
376			BIO_printf(bio_err, "bad input format specified\n");
377			goto end;
378			}
379
380	✗✓	720	if (group == NULL) {
381			BIO_printf(bio_err,
382			"unable to load elliptic curve parameters\n");
383			ERR_print_errors(bio_err);
384			goto end;
385			}
386	✓✗	720	if (ecparam_config.new_form)
387		720	EC_GROUP_set_point_conversion_form(group, ecparam_config.form);
388
389	✓✗	720	if (ecparam_config.new_asn1_flag)
390		720	EC_GROUP_set_asn1_flag(group, ecparam_config.asn1_flag);
391
392	✗✓	720	if (ecparam_config.no_seed)
393			EC_GROUP_set_seed(group, NULL, 0);
394
395	✗✓	720	if (ecparam_config.text) {
396			if (!ECPKParameters_print(out, group, 0))
397			goto end;
398			}
399	✗✓	720	if (ecparam_config.check) {
400			BIO_printf(bio_err, "checking elliptic curve parameters: ");
401			if (!EC_GROUP_check(group, NULL)) {
402			BIO_printf(bio_err, "failed\n");
403			ERR_print_errors(bio_err);
404			} else
405			BIO_printf(bio_err, "ok\n");
406
407			}
408	✓✗	720	if (ecparam_config.C) {
409			size_t buf_len = 0, tmp_len = 0;
410			const EC_POINT *point;
411			int is_prime, len = 0;
412		720	const EC_METHOD *meth = EC_GROUP_method_of(group);
413
414	✓✗✓✗ ✗✓	2160	if ((ec_p = BN_new()) == NULL \|\| (ec_a = BN_new()) == NULL \|\|
415	✓✗✓✗	1440	(ec_b = BN_new()) == NULL \|\| (ec_gen = BN_new()) == NULL \|\|
416	✓✗	720	(ec_order = BN_new()) == NULL \|\|
417		720	(ec_cofactor = BN_new()) == NULL) {
418			perror("malloc");
419			goto end;
420			}
421		720	is_prime = (EC_METHOD_get_field_type(meth) ==
422			NID_X9_62_prime_field);
423
424	✓✓	720	if (is_prime) {
425	✗✓	384	if (!EC_GROUP_get_curve_GFp(group, ec_p, ec_a,
426			ec_b, NULL))
427			goto end;
428			} else {
429	✗✓	336	if (!EC_GROUP_get_curve_GF2m(group, ec_p, ec_a,
430			ec_b, NULL))
431			goto end;
432			}
433
434	✗✓	720	if ((point = EC_GROUP_get0_generator(group)) == NULL)
435			goto end;
436	✗✓	720	if (!EC_POINT_point2bn(group, point,
437		720	EC_GROUP_get_point_conversion_form(group), ec_gen,
438			NULL))
439			goto end;
440	✗✓	720	if (!EC_GROUP_get_order(group, ec_order, NULL))
441			goto end;
442	✗✓	720	if (!EC_GROUP_get_cofactor(group, ec_cofactor, NULL))
443			goto end;
444
445		720	len = BN_num_bits(ec_order);
446
447	✓✗	720	if ((tmp_len = (size_t) BN_num_bytes(ec_p)) > buf_len)
448		720	buf_len = tmp_len;
449	✗✓	720	if ((tmp_len = (size_t) BN_num_bytes(ec_a)) > buf_len)
450			buf_len = tmp_len;
451	✗✓	720	if ((tmp_len = (size_t) BN_num_bytes(ec_b)) > buf_len)
452			buf_len = tmp_len;
453	✓✓	720	if ((tmp_len = (size_t) BN_num_bytes(ec_gen)) > buf_len)
454		680	buf_len = tmp_len;
455	✗✓	720	if ((tmp_len = (size_t) BN_num_bytes(ec_order)) > buf_len)
456			buf_len = tmp_len;
457	✗✓	720	if ((tmp_len = (size_t) BN_num_bytes(ec_cofactor)) > buf_len)
458			buf_len = tmp_len;
459
460		720	buffer = malloc(buf_len);
461
462	✗✓	720	if (buffer == NULL) {
463			perror("malloc");
464			goto end;
465			}
466		720	ecparam_print_var(out, ec_p, "ec_p", len, buffer);
467		720	ecparam_print_var(out, ec_a, "ec_a", len, buffer);
468		720	ecparam_print_var(out, ec_b, "ec_b", len, buffer);
469		720	ecparam_print_var(out, ec_gen, "ec_gen", len, buffer);
470		720	ecparam_print_var(out, ec_order, "ec_order", len, buffer);
471		720	ecparam_print_var(out, ec_cofactor, "ec_cofactor", len,
472			buffer);
473
474		720	BIO_printf(out, "\n\n");
475
476		720	BIO_printf(out, "EC_GROUP *get_ec_group_%d(void)\n\t{\n", len);
477		720	BIO_printf(out, "\tint ok=0;\n");
478		720	BIO_printf(out, "\tEC_GROUP *group = NULL;\n");
479		720	BIO_printf(out, "\tEC_POINT *point = NULL;\n");
480		720	BIO_printf(out, "\tBIGNUM tmp_1 = NULL, tmp_2 = NULL, "
481			"*tmp_3 = NULL;\n\n");
482		720	BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_p_%d, "
483			"sizeof(ec_p_%d), NULL)) == NULL)\n\t\t"
484			"goto err;\n", len, len);
485		720	BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_a_%d, "
486			"sizeof(ec_a_%d), NULL)) == NULL)\n\t\t"
487			"goto err;\n", len, len);
488		720	BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_b_%d, "
489			"sizeof(ec_b_%d), NULL)) == NULL)\n\t\t"
490			"goto err;\n", len, len);
491	✓✓	720	if (is_prime) {
492		384	BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
493			"GFp(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
494			"\n\t\tgoto err;\n\n");
495		384	} else {
496		336	BIO_printf(out, "\tif ((group = EC_GROUP_new_curve_"
497			"GF2m(tmp_1, tmp_2, tmp_3, NULL)) == NULL)"
498			"\n\t\tgoto err;\n\n");
499			}
500		720	BIO_printf(out, "\t/* build generator */\n");
501		720	BIO_printf(out, "\tif ((tmp_1 = BN_bin2bn(ec_gen_%d, "
502			"sizeof(ec_gen_%d), tmp_1)) == NULL)"
503			"\n\t\tgoto err;\n", len, len);
504		720	BIO_printf(out, "\tpoint = EC_POINT_bn2point(group, tmp_1, "
505			"NULL, NULL);\n");
506		720	BIO_printf(out, "\tif (point == NULL)\n\t\tgoto err;\n");
507		720	BIO_printf(out, "\tif ((tmp_2 = BN_bin2bn(ec_order_%d, "
508			"sizeof(ec_order_%d), tmp_2)) == NULL)"
509			"\n\t\tgoto err;\n", len, len);
510		720	BIO_printf(out, "\tif ((tmp_3 = BN_bin2bn(ec_cofactor_%d, "
511			"sizeof(ec_cofactor_%d), tmp_3)) == NULL)"
512			"\n\t\tgoto err;\n", len, len);
513		720	BIO_printf(out, "\tif (!EC_GROUP_set_generator(group, point,"
514			" tmp_2, tmp_3))\n\t\tgoto err;\n");
515		720	BIO_printf(out, "\n\tok=1;\n");
516		720	BIO_printf(out, "err:\n");
517		720	BIO_printf(out, "\tif (tmp_1)\n\t\tBN_free(tmp_1);\n");
518		720	BIO_printf(out, "\tif (tmp_2)\n\t\tBN_free(tmp_2);\n");
519		720	BIO_printf(out, "\tif (tmp_3)\n\t\tBN_free(tmp_3);\n");
520		720	BIO_printf(out, "\tif (point)\n\t\tEC_POINT_free(point);\n");
521		720	BIO_printf(out, "\tif (!ok)\n");
522		720	BIO_printf(out, "\t\t{\n");
523		720	BIO_printf(out, "\t\tEC_GROUP_free(group);\n");
524		720	BIO_printf(out, "\t\tgroup = NULL;\n");
525		720	BIO_printf(out, "\t\t}\n");
526		720	BIO_printf(out, "\treturn(group);\n\t}\n");
527	✓✗✗	720	}
528	✓✗	720	if (!ecparam_config.noout) {
529	✗✓	720	if (ecparam_config.outformat == FORMAT_ASN1)
530			i = i2d_ECPKParameters_bio(out, group);
531	✓✗	720	else if (ecparam_config.outformat == FORMAT_PEM)
532		720	i = PEM_write_bio_ECPKParameters(out, group);
533			else {
534			BIO_printf(bio_err, "bad output format specified for"
535			" outfile\n");
536			goto end;
537			}
538	✗✓	720	if (!i) {
539			BIO_printf(bio_err, "unable to write elliptic "
540			"curve parameters\n");
541			ERR_print_errors(bio_err);
542			goto end;
543			}
544			}
545	✓✗	720	if (ecparam_config.genkey) {
546		720	EC_KEY *eckey = EC_KEY_new();
547
548	✗✓	720	if (eckey == NULL)
549			goto end;
550
551	✗✓	720	if (EC_KEY_set_group(eckey, group) == 0) {
552			EC_KEY_free(eckey);
553			goto end;
554			}
555
556	✗✓	720	if (!EC_KEY_generate_key(eckey)) {
557			EC_KEY_free(eckey);
558			goto end;
559			}
560	✗✓	720	if (ecparam_config.outformat == FORMAT_ASN1)
561			i = i2d_ECPrivateKey_bio(out, eckey);
562	✓✗	720	else if (ecparam_config.outformat == FORMAT_PEM)
563		720	i = PEM_write_bio_ECPrivateKey(out, eckey, NULL,
564			NULL, 0, NULL, NULL);
565			else {
566			BIO_printf(bio_err, "bad output format specified "
567			"for outfile\n");
568			EC_KEY_free(eckey);
569			goto end;
570			}
571		720	EC_KEY_free(eckey);
572	✓✓✓	720	}
573		720	ret = 0;
574
575			end:
576		744	BN_free(ec_p);
577		744	BN_free(ec_a);
578		744	BN_free(ec_b);
579		744	BN_free(ec_gen);
580		744	BN_free(ec_order);
581		744	BN_free(ec_cofactor);
582
583		744	free(buffer);
584
585		744	BIO_free(in);
586		744	BIO_free_all(out);
587		744	EC_GROUP_free(group);
588
589		744	return (ret);
590		744	}
591
592			static int
593			ecparam_print_var(BIO * out, BIGNUM * in, const char *var,
594			int len, unsigned char *buffer)
595			{
596		8640	BIO_printf(out, "static unsigned char %s_%d[] = {", var, len);
597	✓✓	4320	if (BN_is_zero(in))
598		120	BIO_printf(out, "\n\t0x00");
599			else {
600			int i, l;
601
602		4200	l = BN_bn2bin(in, buffer);
603	✓✓	201088	for (i = 0; i < l - 1; i++) {
604	✓✓	96344	if ((i % 12) == 0)
605		9568	BIO_printf(out, "\n\t");
606		96344	BIO_printf(out, "0x%02X,", buffer[i]);
607			}
608	✓✓	4200	if ((i % 12) == 0)
609		1080	BIO_printf(out, "\n\t");
610		4200	BIO_printf(out, "0x%02X", buffer[i]);
611			}
612		4320	BIO_printf(out, "\n\t};\n\n");
613		4320	return 1;
614			}
615			#endif