500 lines
13 KiB
C
500 lines
13 KiB
C
/* crypto/ecdsa/ecdsatest.c */
|
|
/*
|
|
* Written by Nils Larsch for the OpenSSL project.
|
|
*/
|
|
/* ====================================================================
|
|
* Copyright (c) 2000-2005 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
|
|
* 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.
|
|
* ====================================================================
|
|
*
|
|
* 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */
|
|
|
|
#ifdef OPENSSL_NO_ECDSA
|
|
int main(int argc, char * argv[])
|
|
{
|
|
puts("Elliptic curves are disabled.");
|
|
return 0;
|
|
}
|
|
#else
|
|
|
|
#include <openssl/crypto.h>
|
|
#include <openssl/bio.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/bn.h>
|
|
#include <openssl/ecdsa.h>
|
|
#ifndef OPENSSL_NO_ENGINE
|
|
#include <openssl/engine.h>
|
|
#endif
|
|
#include <openssl/err.h>
|
|
#include <openssl/rand.h>
|
|
|
|
static const char rnd_seed[] = "string to make the random number generator "
|
|
"think it has entropy";
|
|
|
|
/* declaration of the test functions */
|
|
int x9_62_tests(BIO *);
|
|
int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s);
|
|
int test_builtin(BIO *);
|
|
|
|
/* functions to change the RAND_METHOD */
|
|
int change_rand(void);
|
|
int restore_rand(void);
|
|
int fbytes(unsigned char *buf, int num);
|
|
|
|
RAND_METHOD fake_rand;
|
|
const RAND_METHOD *old_rand;
|
|
|
|
int change_rand(void)
|
|
{
|
|
/* save old rand method */
|
|
if ((old_rand = RAND_get_rand_method()) == NULL)
|
|
return 0;
|
|
|
|
fake_rand.seed = old_rand->seed;
|
|
fake_rand.cleanup = old_rand->cleanup;
|
|
fake_rand.add = old_rand->add;
|
|
fake_rand.status = old_rand->status;
|
|
/* use own random function */
|
|
fake_rand.bytes = fbytes;
|
|
fake_rand.pseudorand = old_rand->bytes;
|
|
/* set new RAND_METHOD */
|
|
if (!RAND_set_rand_method(&fake_rand))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int restore_rand(void)
|
|
{
|
|
if (!RAND_set_rand_method(old_rand))
|
|
return 0;
|
|
else
|
|
return 1;
|
|
}
|
|
|
|
static int fbytes_counter = 0;
|
|
static const char *numbers[8] = {
|
|
"651056770906015076056810763456358567190100156695615665659",
|
|
"6140507067065001063065065565667405560006161556565665656654",
|
|
"8763001015071075675010661307616710783570106710677817767166"
|
|
"71676178726717",
|
|
"7000000175690566466555057817571571075705015757757057795755"
|
|
"55657156756655",
|
|
"1275552191113212300012030439187146164646146646466749494799",
|
|
"1542725565216523985789236956265265265235675811949404040041",
|
|
"1456427555219115346513212300075341203043918714616464614664"
|
|
"64667494947990",
|
|
"1712787255652165239672857892369562652652652356758119494040"
|
|
"40041670216363"};
|
|
|
|
int fbytes(unsigned char *buf, int num)
|
|
{
|
|
int ret;
|
|
BIGNUM *tmp = NULL;
|
|
|
|
if (fbytes_counter >= 8)
|
|
return 0;
|
|
tmp = BN_new();
|
|
if (!tmp)
|
|
return 0;
|
|
if (!BN_dec2bn(&tmp, numbers[fbytes_counter]))
|
|
{
|
|
BN_free(tmp);
|
|
return 0;
|
|
}
|
|
fbytes_counter ++;
|
|
if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf))
|
|
ret = 0;
|
|
else
|
|
ret = 1;
|
|
if (tmp)
|
|
BN_free(tmp);
|
|
return ret;
|
|
}
|
|
|
|
/* some tests from the X9.62 draft */
|
|
int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in)
|
|
{
|
|
int ret = 0;
|
|
const char message[] = "abc";
|
|
unsigned char digest[20];
|
|
unsigned int dgst_len = 0;
|
|
EVP_MD_CTX md_ctx;
|
|
EC_KEY *key = NULL;
|
|
ECDSA_SIG *signature = NULL;
|
|
BIGNUM *r = NULL, *s = NULL;
|
|
|
|
EVP_MD_CTX_init(&md_ctx);
|
|
/* get the message digest */
|
|
EVP_DigestInit(&md_ctx, EVP_ecdsa());
|
|
EVP_DigestUpdate(&md_ctx, (const void*)message, 3);
|
|
EVP_DigestFinal(&md_ctx, digest, &dgst_len);
|
|
|
|
BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid));
|
|
/* create the key */
|
|
if ((key = EC_KEY_new_by_curve_name(nid)) == NULL)
|
|
goto x962_int_err;
|
|
if (!EC_KEY_generate_key(key))
|
|
goto x962_int_err;
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* create the signature */
|
|
signature = ECDSA_do_sign(digest, 20, key);
|
|
if (signature == NULL)
|
|
goto x962_int_err;
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* compare the created signature with the expected signature */
|
|
if ((r = BN_new()) == NULL || (s = BN_new()) == NULL)
|
|
goto x962_int_err;
|
|
if (!BN_dec2bn(&r, r_in) ||
|
|
!BN_dec2bn(&s, s_in))
|
|
goto x962_int_err;
|
|
if (BN_cmp(signature->r ,r) || BN_cmp(signature->s, s))
|
|
goto x962_int_err;
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* verify the signature */
|
|
if (ECDSA_do_verify(digest, 20, signature, key) != 1)
|
|
goto x962_int_err;
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
|
|
BIO_printf(out, " ok\n");
|
|
ret = 1;
|
|
x962_int_err:
|
|
if (!ret)
|
|
BIO_printf(out, " failed\n");
|
|
if (key)
|
|
EC_KEY_free(key);
|
|
if (signature)
|
|
ECDSA_SIG_free(signature);
|
|
if (r)
|
|
BN_free(r);
|
|
if (s)
|
|
BN_free(s);
|
|
EVP_MD_CTX_cleanup(&md_ctx);
|
|
return ret;
|
|
}
|
|
|
|
int x9_62_tests(BIO *out)
|
|
{
|
|
int ret = 0;
|
|
|
|
BIO_printf(out, "some tests from X9.62:\n");
|
|
|
|
/* set own rand method */
|
|
if (!change_rand())
|
|
goto x962_err;
|
|
|
|
if (!x9_62_test_internal(out, NID_X9_62_prime192v1,
|
|
"3342403536405981729393488334694600415596881826869351677613",
|
|
"5735822328888155254683894997897571951568553642892029982342"))
|
|
goto x962_err;
|
|
if (!x9_62_test_internal(out, NID_X9_62_prime239v1,
|
|
"3086361431751678114926225473006680188549593787585317781474"
|
|
"62058306432176",
|
|
"3238135532097973577080787768312505059318910517550078427819"
|
|
"78505179448783"))
|
|
goto x962_err;
|
|
if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1,
|
|
"87194383164871543355722284926904419997237591535066528048",
|
|
"308992691965804947361541664549085895292153777025772063598"))
|
|
goto x962_err;
|
|
if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1,
|
|
"2159633321041961198501834003903461262881815148684178964245"
|
|
"5876922391552",
|
|
"1970303740007316867383349976549972270528498040721988191026"
|
|
"49413465737174"))
|
|
goto x962_err;
|
|
|
|
ret = 1;
|
|
x962_err:
|
|
if (!restore_rand())
|
|
ret = 0;
|
|
return ret;
|
|
}
|
|
|
|
int test_builtin(BIO *out)
|
|
{
|
|
EC_builtin_curve *curves = NULL;
|
|
size_t crv_len = 0, n = 0;
|
|
EC_KEY *eckey = NULL, *wrong_eckey = NULL;
|
|
EC_GROUP *group;
|
|
unsigned char digest[20], wrong_digest[20];
|
|
unsigned char *signature = NULL;
|
|
unsigned int sig_len;
|
|
int nid, ret = 0;
|
|
|
|
/* fill digest values with some random data */
|
|
if (!RAND_pseudo_bytes(digest, 20) ||
|
|
!RAND_pseudo_bytes(wrong_digest, 20))
|
|
{
|
|
BIO_printf(out, "ERROR: unable to get random data\n");
|
|
goto builtin_err;
|
|
}
|
|
|
|
/* create and verify a ecdsa signature with every availble curve
|
|
* (with ) */
|
|
BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
|
|
"with some internal curves:\n");
|
|
|
|
/* get a list of all internal curves */
|
|
crv_len = EC_get_builtin_curves(NULL, 0);
|
|
|
|
curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len);
|
|
|
|
if (curves == NULL)
|
|
{
|
|
BIO_printf(out, "malloc error\n");
|
|
goto builtin_err;
|
|
}
|
|
|
|
if (!EC_get_builtin_curves(curves, crv_len))
|
|
{
|
|
BIO_printf(out, "unable to get internal curves\n");
|
|
goto builtin_err;
|
|
}
|
|
|
|
/* now create and verify a signature for every curve */
|
|
for (n = 0; n < crv_len; n++)
|
|
{
|
|
unsigned char dirt, offset;
|
|
|
|
nid = curves[n].nid;
|
|
if (nid == NID_ipsec4)
|
|
continue;
|
|
/* create new ecdsa key (== EC_KEY) */
|
|
if ((eckey = EC_KEY_new()) == NULL)
|
|
goto builtin_err;
|
|
group = EC_GROUP_new_by_curve_name(nid);
|
|
if (group == NULL)
|
|
goto builtin_err;
|
|
if (EC_KEY_set_group(eckey, group) == 0)
|
|
goto builtin_err;
|
|
EC_GROUP_free(group);
|
|
if (EC_GROUP_get_degree(EC_KEY_get0_group(eckey)) < 160)
|
|
/* drop the curve */
|
|
{
|
|
EC_KEY_free(eckey);
|
|
eckey = NULL;
|
|
continue;
|
|
}
|
|
BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
|
|
/* create key */
|
|
if (!EC_KEY_generate_key(eckey))
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
/* create second key */
|
|
if ((wrong_eckey = EC_KEY_new()) == NULL)
|
|
goto builtin_err;
|
|
group = EC_GROUP_new_by_curve_name(nid);
|
|
if (group == NULL)
|
|
goto builtin_err;
|
|
if (EC_KEY_set_group(wrong_eckey, group) == 0)
|
|
goto builtin_err;
|
|
EC_GROUP_free(group);
|
|
if (!EC_KEY_generate_key(wrong_eckey))
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* check key */
|
|
if (!EC_KEY_check_key(eckey))
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* create signature */
|
|
sig_len = ECDSA_size(eckey);
|
|
if ((signature = OPENSSL_malloc(sig_len)) == NULL)
|
|
goto builtin_err;
|
|
if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey))
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* verify signature */
|
|
if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1)
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* verify signature with the wrong key */
|
|
if (ECDSA_verify(0, digest, 20, signature, sig_len,
|
|
wrong_eckey) == 1)
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* wrong digest */
|
|
if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len,
|
|
eckey) == 1)
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
/* modify a single byte of the signature */
|
|
offset = signature[10] % sig_len;
|
|
dirt = signature[11];
|
|
signature[offset] ^= dirt ? dirt : 1;
|
|
if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1)
|
|
{
|
|
BIO_printf(out, " failed\n");
|
|
goto builtin_err;
|
|
}
|
|
BIO_printf(out, ".");
|
|
(void)BIO_flush(out);
|
|
|
|
BIO_printf(out, " ok\n");
|
|
/* cleanup */
|
|
OPENSSL_free(signature);
|
|
signature = NULL;
|
|
EC_KEY_free(eckey);
|
|
eckey = NULL;
|
|
EC_KEY_free(wrong_eckey);
|
|
wrong_eckey = NULL;
|
|
}
|
|
|
|
ret = 1;
|
|
builtin_err:
|
|
if (eckey)
|
|
EC_KEY_free(eckey);
|
|
if (wrong_eckey)
|
|
EC_KEY_free(wrong_eckey);
|
|
if (signature)
|
|
OPENSSL_free(signature);
|
|
if (curves)
|
|
OPENSSL_free(curves);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int ret = 1;
|
|
BIO *out;
|
|
|
|
out = BIO_new_fp(stdout, BIO_NOCLOSE);
|
|
|
|
/* enable memory leak checking unless explicitly disabled */
|
|
if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) &&
|
|
(0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off"))))
|
|
{
|
|
CRYPTO_malloc_debug_init();
|
|
CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL);
|
|
}
|
|
else
|
|
{
|
|
/* OPENSSL_DEBUG_MEMORY=off */
|
|
CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0);
|
|
}
|
|
CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
|
|
|
|
ERR_load_crypto_strings();
|
|
|
|
/* initialize the prng */
|
|
RAND_seed(rnd_seed, sizeof(rnd_seed));
|
|
|
|
/* the tests */
|
|
if (!x9_62_tests(out)) goto err;
|
|
if (!test_builtin(out)) goto err;
|
|
|
|
ret = 0;
|
|
err:
|
|
if (ret)
|
|
BIO_printf(out, "\nECDSA test failed\n");
|
|
else
|
|
BIO_printf(out, "\nECDSA test passed\n");
|
|
if (ret)
|
|
ERR_print_errors(out);
|
|
CRYPTO_cleanup_all_ex_data();
|
|
ERR_remove_thread_state(NULL);
|
|
ERR_free_strings();
|
|
CRYPTO_mem_leaks(out);
|
|
if (out != NULL)
|
|
BIO_free(out);
|
|
return ret;
|
|
}
|
|
#endif
|