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|
/* fips/ecdh/fips_ecdhvs.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project.
*/
/* ====================================================================
* Copyright (c) 2011 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
* licensing@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.
* ====================================================================
*/
#define OPENSSL_FIPSAPI
#include <openssl/opensslconf.h>
#ifndef OPENSSL_FIPS
#include <stdio.h>
int main(int argc, char **argv)
{
printf("No FIPS ECDH support\n");
return(0);
}
#else
#include <openssl/crypto.h>
#include <openssl/bn.h>
#include <openssl/ecdh.h>
#include <openssl/fips.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <string.h>
#include <ctype.h>
#include "fips_utl.h"
static const EVP_MD *parse_md(char *line)
{
char *p;
if (line[0] != '[' || line[1] != 'E')
return NULL;
p = strchr(line, '-');
if (!p)
return NULL;
line = p + 1;
p = strchr(line, ']');
if (!p)
return NULL;
*p = 0;
p = line;
while(isspace(*p))
p++;
if (!strcmp(p, "SHA1"))
return EVP_sha1();
else if (!strcmp(p, "SHA224"))
return EVP_sha224();
else if (!strcmp(p, "SHA256"))
return EVP_sha256();
else if (!strcmp(p, "SHA384"))
return EVP_sha384();
else if (!strcmp(p, "SHA512"))
return EVP_sha512();
else
return NULL;
}
static int lookup_curve(char *cname)
{
char *p;
p = strchr(cname, ':');
if (!p)
{
fprintf(stderr, "Parse error: missing :\n");
return NID_undef;
}
cname = p + 1;
while(isspace(*cname))
cname++;
p = strchr(cname, ']');
if (!p)
{
fprintf(stderr, "Parse error: missing ]\n");
return NID_undef;
}
*p = 0;
if (!strcmp(cname, "B-163"))
return NID_sect163r2;
if (!strcmp(cname, "B-233"))
return NID_sect233r1;
if (!strcmp(cname, "B-283"))
return NID_sect283r1;
if (!strcmp(cname, "B-409"))
return NID_sect409r1;
if (!strcmp(cname, "B-571"))
return NID_sect571r1;
if (!strcmp(cname, "K-163"))
return NID_sect163k1;
if (!strcmp(cname, "K-233"))
return NID_sect233k1;
if (!strcmp(cname, "K-283"))
return NID_sect283k1;
if (!strcmp(cname, "K-409"))
return NID_sect409k1;
if (!strcmp(cname, "K-571"))
return NID_sect571k1;
if (!strcmp(cname, "P-192"))
return NID_X9_62_prime192v1;
if (!strcmp(cname, "P-224"))
return NID_secp224r1;
if (!strcmp(cname, "P-256"))
return NID_X9_62_prime256v1;
if (!strcmp(cname, "P-384"))
return NID_secp384r1;
if (!strcmp(cname, "P-521"))
return NID_secp521r1;
fprintf(stderr, "Unknown Curve name %s\n", cname);
return NID_undef;
}
static EC_POINT *make_peer(EC_GROUP *group, BIGNUM *x, BIGNUM *y)
{
EC_POINT *peer;
int rv;
BN_CTX *c;
peer = EC_POINT_new(group);
if (!peer)
return NULL;
c = BN_CTX_new();
if (EC_METHOD_get_field_type(EC_GROUP_method_of(group))
== NID_X9_62_prime_field)
rv = EC_POINT_set_affine_coordinates_GFp(group, peer, x, y, c);
else
#ifdef OPENSSL_NO_EC2M
{
fprintf(stderr, "ERROR: GF2m not supported\n");
exit(1);
}
#else
rv = EC_POINT_set_affine_coordinates_GF2m(group, peer, x, y, c);
#endif
BN_CTX_free(c);
if (rv)
return peer;
EC_POINT_free(peer);
return NULL;
}
static int ec_print_pubkey(FILE *out, EC_KEY *key)
{
const EC_POINT *pt;
const EC_GROUP *grp;
const EC_METHOD *meth;
int rv;
BIGNUM *tx, *ty;
BN_CTX *ctx;
ctx = BN_CTX_new();
if (!ctx)
return 0;
tx = BN_CTX_get(ctx);
ty = BN_CTX_get(ctx);
if (!tx || !ty)
return 0;
grp = EC_KEY_get0_group(key);
pt = EC_KEY_get0_public_key(key);
meth = EC_GROUP_method_of(grp);
if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field)
rv = EC_POINT_get_affine_coordinates_GFp(grp, pt, tx, ty, ctx);
else
#ifdef OPENSSL_NO_EC2M
{
fprintf(stderr, "ERROR: GF2m not supported\n");
exit(1);
}
#else
rv = EC_POINT_get_affine_coordinates_GF2m(grp, pt, tx, ty, ctx);
#endif
do_bn_print_name(out, "QeIUTx", tx);
do_bn_print_name(out, "QeIUTy", ty);
BN_CTX_free(ctx);
return rv;
}
static void ec_output_Zhash(FILE *out, int exout, EC_GROUP *group,
BIGNUM *ix, BIGNUM *iy, BIGNUM *id, BIGNUM *cx,
BIGNUM *cy, const EVP_MD *md,
unsigned char *rhash, size_t rhashlen)
{
EC_KEY *ec = NULL;
EC_POINT *peerkey = NULL;
unsigned char *Z;
unsigned char chash[EVP_MAX_MD_SIZE];
int Zlen;
ec = EC_KEY_new();
EC_KEY_set_group(ec, group);
peerkey = make_peer(group, cx, cy);
if (rhash == NULL)
{
rhashlen = M_EVP_MD_size(md);
EC_KEY_generate_key(ec);
ec_print_pubkey(out, ec);
}
else
{
EC_KEY_set_public_key_affine_coordinates(ec, ix, iy);
EC_KEY_set_private_key(ec, id);
}
Zlen = (EC_GROUP_get_degree(group) + 7)/8;
Z =
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