File: [local] / src / usr.bin / openssl / ecparam.c (download)
Revision 1.18, Sun Jul 14 03:30:45 2019 UTC (4 years, 11 months ago) by guenther
Branch: MAIN
CVS Tags: OPENBSD_6_9_BASE, OPENBSD_6_9, OPENBSD_6_8_BASE, OPENBSD_6_8, OPENBSD_6_7_BASE, OPENBSD_6_7, OPENBSD_6_6_BASE, OPENBSD_6_6 Changes since 1.17: +2 -2 lines
Mark the initialized struct options arrays as both static and const.
This moves them from .data to .data.rel.ro
ok deraadt@ inoguchi@
|
/* $OpenBSD: ecparam.c,v 1.18 2019/07/14 03:30:45 guenther 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);
}
static const 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", 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