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556 lines
18 KiB
556 lines
18 KiB
/* crypto/ecdsa/ecdsatest.c */ |
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/* |
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* Written by Nils Larsch for the OpenSSL project. |
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*/ |
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/* ==================================================================== |
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* Copyright (c) 2000-2005 The OpenSSL Project. All rights reserved. |
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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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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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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 |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. All advertising materials mentioning features or use of this |
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* software must display the following acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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* |
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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* endorse or promote products derived from this software without |
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* prior written permission. For written permission, please contact |
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* licensing@OpenSSL.org. |
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* |
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* 5. Products derived from this software may not be called "OpenSSL" |
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* nor may "OpenSSL" appear in their names without prior written |
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* permission of the OpenSSL Project. |
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* |
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* 6. Redistributions of any form whatsoever must retain the following |
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* acknowledgment: |
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* "This product includes software developed by the OpenSSL Project |
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This product includes cryptographic software written by Eric Young |
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* (eay@cryptsoft.com). This product includes software written by Tim |
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* Hudson (tjh@cryptsoft.com). |
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* |
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*/ |
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/* ==================================================================== |
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* Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
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* |
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* Portions of the attached software ("Contribution") are developed by |
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* SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
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* |
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* The Contribution is licensed pursuant to the OpenSSL open source |
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* license provided above. |
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* |
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* The elliptic curve binary polynomial software is originally written by |
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* Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories. |
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* |
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*/ |
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|
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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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|
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#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_ECDSA is defined */ |
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|
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#ifdef OPENSSL_NO_ECDSA |
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int main(int argc, char *argv[]) |
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{ |
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puts("Elliptic curves are disabled."); |
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return 0; |
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} |
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#else |
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|
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# include <openssl/crypto.h> |
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# include <openssl/bio.h> |
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# include <openssl/evp.h> |
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# include <openssl/bn.h> |
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# include <openssl/ecdsa.h> |
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# ifndef OPENSSL_NO_ENGINE |
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# include <openssl/engine.h> |
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# endif |
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# include <openssl/err.h> |
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# include <openssl/rand.h> |
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|
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static const char rnd_seed[] = "string to make the random number generator " |
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"think it has entropy"; |
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|
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/* declaration of the test functions */ |
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int x9_62_tests(BIO *); |
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int x9_62_test_internal(BIO *out, int nid, const char *r, const char *s); |
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int test_builtin(BIO *); |
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|
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/* functions to change the RAND_METHOD */ |
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int change_rand(void); |
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int restore_rand(void); |
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int fbytes(unsigned char *buf, int num); |
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|
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RAND_METHOD fake_rand; |
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const RAND_METHOD *old_rand; |
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|
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int change_rand(void) |
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{ |
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/* save old rand method */ |
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if ((old_rand = RAND_get_rand_method()) == NULL) |
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return 0; |
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|
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fake_rand.seed = old_rand->seed; |
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fake_rand.cleanup = old_rand->cleanup; |
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fake_rand.add = old_rand->add; |
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fake_rand.status = old_rand->status; |
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/* use own random function */ |
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fake_rand.bytes = fbytes; |
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fake_rand.pseudorand = old_rand->bytes; |
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/* set new RAND_METHOD */ |
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if (!RAND_set_rand_method(&fake_rand)) |
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return 0; |
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return 1; |
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} |
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|
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int restore_rand(void) |
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{ |
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if (!RAND_set_rand_method(old_rand)) |
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return 0; |
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else |
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return 1; |
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} |
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|
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static int fbytes_counter = 0; |
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static const char *numbers[8] = { |
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"651056770906015076056810763456358567190100156695615665659", |
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"6140507067065001063065065565667405560006161556565665656654", |
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"8763001015071075675010661307616710783570106710677817767166" |
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"71676178726717", |
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"7000000175690566466555057817571571075705015757757057795755" |
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"55657156756655", |
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"1275552191113212300012030439187146164646146646466749494799", |
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"1542725565216523985789236956265265265235675811949404040041", |
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"1456427555219115346513212300075341203043918714616464614664" |
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"64667494947990", |
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"1712787255652165239672857892369562652652652356758119494040" |
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"40041670216363" |
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}; |
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|
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int fbytes(unsigned char *buf, int num) |
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{ |
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int ret; |
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BIGNUM *tmp = NULL; |
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|
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if (fbytes_counter >= 8) |
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return 0; |
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tmp = BN_new(); |
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if (!tmp) |
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return 0; |
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if (!BN_dec2bn(&tmp, numbers[fbytes_counter])) { |
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BN_free(tmp); |
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return 0; |
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} |
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fbytes_counter++; |
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if (num != BN_num_bytes(tmp) || !BN_bn2bin(tmp, buf)) |
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ret = 0; |
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else |
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ret = 1; |
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if (tmp) |
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BN_free(tmp); |
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return ret; |
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} |
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|
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/* some tests from the X9.62 draft */ |
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int x9_62_test_internal(BIO *out, int nid, const char *r_in, const char *s_in) |
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{ |
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int ret = 0; |
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const char message[] = "abc"; |
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unsigned char digest[20]; |
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unsigned int dgst_len = 0; |
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EVP_MD_CTX md_ctx; |
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EC_KEY *key = NULL; |
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ECDSA_SIG *signature = NULL; |
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BIGNUM *r = NULL, *s = NULL; |
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EVP_MD_CTX_init(&md_ctx); |
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/* get the message digest */ |
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EVP_DigestInit(&md_ctx, EVP_ecdsa()); |
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EVP_DigestUpdate(&md_ctx, (const void *)message, 3); |
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EVP_DigestFinal(&md_ctx, digest, &dgst_len); |
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BIO_printf(out, "testing %s: ", OBJ_nid2sn(nid)); |
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/* create the key */ |
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if ((key = EC_KEY_new_by_curve_name(nid)) == NULL) |
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goto x962_int_err; |
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if (!EC_KEY_generate_key(key)) |
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goto x962_int_err; |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* create the signature */ |
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signature = ECDSA_do_sign(digest, 20, key); |
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if (signature == NULL) |
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goto x962_int_err; |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* compare the created signature with the expected signature */ |
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if ((r = BN_new()) == NULL || (s = BN_new()) == NULL) |
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goto x962_int_err; |
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if (!BN_dec2bn(&r, r_in) || !BN_dec2bn(&s, s_in)) |
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goto x962_int_err; |
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if (BN_cmp(signature->r, r) || BN_cmp(signature->s, s)) |
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goto x962_int_err; |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* verify the signature */ |
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if (ECDSA_do_verify(digest, 20, signature, key) != 1) |
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goto x962_int_err; |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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BIO_printf(out, " ok\n"); |
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ret = 1; |
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x962_int_err: |
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if (!ret) |
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BIO_printf(out, " failed\n"); |
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if (key) |
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EC_KEY_free(key); |
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if (signature) |
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ECDSA_SIG_free(signature); |
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if (r) |
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BN_free(r); |
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if (s) |
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BN_free(s); |
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EVP_MD_CTX_cleanup(&md_ctx); |
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return ret; |
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} |
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int x9_62_tests(BIO *out) |
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{ |
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int ret = 0; |
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BIO_printf(out, "some tests from X9.62:\n"); |
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|
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/* set own rand method */ |
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if (!change_rand()) |
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goto x962_err; |
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if (!x9_62_test_internal(out, NID_X9_62_prime192v1, |
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"3342403536405981729393488334694600415596881826869351677613", |
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"5735822328888155254683894997897571951568553642892029982342")) |
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goto x962_err; |
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if (!x9_62_test_internal(out, NID_X9_62_prime239v1, |
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"3086361431751678114926225473006680188549593787585317781474" |
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"62058306432176", |
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"3238135532097973577080787768312505059318910517550078427819" |
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"78505179448783")) |
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goto x962_err; |
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# ifndef OPENSSL_NO_EC2M |
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if (!x9_62_test_internal(out, NID_X9_62_c2tnb191v1, |
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"87194383164871543355722284926904419997237591535066528048", |
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"308992691965804947361541664549085895292153777025772063598")) |
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goto x962_err; |
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if (!x9_62_test_internal(out, NID_X9_62_c2tnb239v1, |
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"2159633321041961198501834003903461262881815148684178964245" |
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"5876922391552", |
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"1970303740007316867383349976549972270528498040721988191026" |
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"49413465737174")) |
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goto x962_err; |
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# endif |
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ret = 1; |
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x962_err: |
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if (!restore_rand()) |
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ret = 0; |
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return ret; |
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} |
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int test_builtin(BIO *out) |
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{ |
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EC_builtin_curve *curves = NULL; |
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size_t crv_len = 0, n = 0; |
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EC_KEY *eckey = NULL, *wrong_eckey = NULL; |
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EC_GROUP *group; |
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ECDSA_SIG *ecdsa_sig = NULL; |
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unsigned char digest[20], wrong_digest[20]; |
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unsigned char *signature = NULL; |
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const unsigned char *sig_ptr; |
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unsigned char *sig_ptr2; |
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unsigned char *raw_buf = NULL; |
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unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len; |
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int nid, ret = 0; |
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|
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/* fill digest values with some random data */ |
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if (RAND_pseudo_bytes(digest, 20) <= 0 || |
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RAND_pseudo_bytes(wrong_digest, 20) <= 0) { |
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BIO_printf(out, "ERROR: unable to get random data\n"); |
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goto builtin_err; |
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} |
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/* |
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* create and verify a ecdsa signature with every availble curve (with ) |
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*/ |
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BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() " |
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"with some internal curves:\n"); |
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|
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/* get a list of all internal curves */ |
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crv_len = EC_get_builtin_curves(NULL, 0); |
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curves = OPENSSL_malloc(sizeof(EC_builtin_curve) * crv_len); |
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if (curves == NULL) { |
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BIO_printf(out, "malloc error\n"); |
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goto builtin_err; |
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} |
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if (!EC_get_builtin_curves(curves, crv_len)) { |
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BIO_printf(out, "unable to get internal curves\n"); |
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goto builtin_err; |
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} |
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|
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/* now create and verify a signature for every curve */ |
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for (n = 0; n < crv_len; n++) { |
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unsigned char dirt, offset; |
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nid = curves[n].nid; |
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if (nid == NID_ipsec4) |
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continue; |
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/* create new ecdsa key (== EC_KEY) */ |
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if ((eckey = EC_KEY_new()) == NULL) |
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goto builtin_err; |
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group = EC_GROUP_new_by_curve_name(nid); |
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if (group == NULL) |
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goto builtin_err; |
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if (EC_KEY_set_group(eckey, group) == 0) |
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goto builtin_err; |
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EC_GROUP_free(group); |
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degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey)); |
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if (degree < 160) |
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/* drop the curve */ |
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{ |
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EC_KEY_free(eckey); |
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eckey = NULL; |
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continue; |
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} |
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BIO_printf(out, "%s: ", OBJ_nid2sn(nid)); |
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/* create key */ |
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if (!EC_KEY_generate_key(eckey)) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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/* create second key */ |
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if ((wrong_eckey = EC_KEY_new()) == NULL) |
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goto builtin_err; |
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group = EC_GROUP_new_by_curve_name(nid); |
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if (group == NULL) |
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goto builtin_err; |
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if (EC_KEY_set_group(wrong_eckey, group) == 0) |
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goto builtin_err; |
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EC_GROUP_free(group); |
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if (!EC_KEY_generate_key(wrong_eckey)) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* check key */ |
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if (!EC_KEY_check_key(eckey)) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* create signature */ |
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sig_len = ECDSA_size(eckey); |
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if ((signature = OPENSSL_malloc(sig_len)) == NULL) |
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goto builtin_err; |
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if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey)) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* verify signature */ |
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* verify signature with the wrong key */ |
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if (ECDSA_verify(0, digest, 20, signature, sig_len, wrong_eckey) == 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* wrong digest */ |
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if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len, eckey) == 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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/* wrong length */ |
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if (ECDSA_verify(0, digest, 20, signature, sig_len - 1, eckey) == 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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|
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/* |
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* Modify a single byte of the signature: to ensure we don't garble |
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* the ASN1 structure, we read the raw signature and modify a byte in |
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* one of the bignums directly. |
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*/ |
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sig_ptr = signature; |
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if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == NULL) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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|
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/* Store the two BIGNUMs in raw_buf. */ |
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r_len = BN_num_bytes(ecdsa_sig->r); |
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s_len = BN_num_bytes(ecdsa_sig->s); |
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bn_len = (degree + 7) / 8; |
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if ((r_len > bn_len) || (s_len > bn_len)) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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buf_len = 2 * bn_len; |
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if ((raw_buf = OPENSSL_malloc(buf_len)) == NULL) |
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goto builtin_err; |
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/* Pad the bignums with leading zeroes. */ |
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memset(raw_buf, 0, buf_len); |
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BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len); |
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BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len); |
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|
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/* Modify a single byte in the buffer. */ |
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offset = raw_buf[10] % buf_len; |
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dirt = raw_buf[11] ? raw_buf[11] : 1; |
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raw_buf[offset] ^= dirt; |
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/* Now read the BIGNUMs back in from raw_buf. */ |
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if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) || |
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(BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL)) |
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goto builtin_err; |
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|
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sig_ptr2 = signature; |
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sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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/* |
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* Sanity check: undo the modification and verify signature. |
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*/ |
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raw_buf[offset] ^= dirt; |
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if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) || |
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(BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL)) |
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goto builtin_err; |
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|
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sig_ptr2 = signature; |
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sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) { |
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BIO_printf(out, " failed\n"); |
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goto builtin_err; |
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} |
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BIO_printf(out, "."); |
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(void)BIO_flush(out); |
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|
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BIO_printf(out, " ok\n"); |
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/* cleanup */ |
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/* clean bogus errors */ |
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ERR_clear_error(); |
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OPENSSL_free(signature); |
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signature = NULL; |
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EC_KEY_free(eckey); |
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eckey = NULL; |
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EC_KEY_free(wrong_eckey); |
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wrong_eckey = NULL; |
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ECDSA_SIG_free(ecdsa_sig); |
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ecdsa_sig = NULL; |
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OPENSSL_free(raw_buf); |
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raw_buf = NULL; |
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} |
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|
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ret = 1; |
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builtin_err: |
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if (eckey) |
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EC_KEY_free(eckey); |
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if (wrong_eckey) |
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EC_KEY_free(wrong_eckey); |
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if (ecdsa_sig) |
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ECDSA_SIG_free(ecdsa_sig); |
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if (signature) |
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OPENSSL_free(signature); |
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if (raw_buf) |
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OPENSSL_free(raw_buf); |
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if (curves) |
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OPENSSL_free(curves); |
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|
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return ret; |
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} |
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|
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int main(void) |
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{ |
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int ret = 1; |
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BIO *out; |
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|
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out = BIO_new_fp(stdout, BIO_NOCLOSE); |
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|
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/* enable memory leak checking unless explicitly disabled */ |
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if (!((getenv("OPENSSL_DEBUG_MEMORY") != NULL) && |
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(0 == strcmp(getenv("OPENSSL_DEBUG_MEMORY"), "off")))) { |
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CRYPTO_malloc_debug_init(); |
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CRYPTO_set_mem_debug_options(V_CRYPTO_MDEBUG_ALL); |
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} else { |
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/* OPENSSL_DEBUG_MEMORY=off */ |
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CRYPTO_set_mem_debug_functions(0, 0, 0, 0, 0); |
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} |
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CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON); |
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|
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ERR_load_crypto_strings(); |
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|
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/* initialize the prng */ |
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RAND_seed(rnd_seed, sizeof(rnd_seed)); |
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|
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/* 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
|
|
|