| /* 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; |
| # ifndef OPENSSL_NO_EC2M |
| 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; |
| # endif |
| 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; |
| ECDSA_SIG *ecdsa_sig = NULL; |
| unsigned char digest[20], wrong_digest[20]; |
| unsigned char *signature = NULL; |
| const unsigned char *sig_ptr; |
| unsigned char *sig_ptr2; |
| unsigned char *raw_buf = NULL; |
| unsigned int sig_len, degree, r_len, s_len, bn_len, buf_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); |
| degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey)); |
| if (degree < 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); |
| /* wrong length */ |
| if (ECDSA_verify(0, digest, 20, signature, sig_len - 1, eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| BIO_printf(out, "."); |
| (void)BIO_flush(out); |
| |
| /* |
| * Modify a single byte of the signature: to ensure we don't garble |
| * the ASN1 structure, we read the raw signature and modify a byte in |
| * one of the bignums directly. |
| */ |
| sig_ptr = signature; |
| if ((ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)) == NULL) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| |
| /* Store the two BIGNUMs in raw_buf. */ |
| r_len = BN_num_bytes(ecdsa_sig->r); |
| s_len = BN_num_bytes(ecdsa_sig->s); |
| bn_len = (degree + 7) / 8; |
| if ((r_len > bn_len) || (s_len > bn_len)) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| buf_len = 2 * bn_len; |
| if ((raw_buf = OPENSSL_malloc(buf_len)) == NULL) |
| goto builtin_err; |
| /* Pad the bignums with leading zeroes. */ |
| memset(raw_buf, 0, buf_len); |
| BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len); |
| BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len); |
| |
| /* Modify a single byte in the buffer. */ |
| offset = raw_buf[10] % buf_len; |
| dirt = raw_buf[11] ? raw_buf[11] : 1; |
| raw_buf[offset] ^= dirt; |
| /* Now read the BIGNUMs back in from raw_buf. */ |
| if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) || |
| (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL)) |
| goto builtin_err; |
| |
| sig_ptr2 = signature; |
| sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
| if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) { |
| BIO_printf(out, " failed\n"); |
| goto builtin_err; |
| } |
| /* |
| * Sanity check: undo the modification and verify signature. |
| */ |
| raw_buf[offset] ^= dirt; |
| if ((BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL) || |
| (BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL)) |
| goto builtin_err; |
| |
| sig_ptr2 = signature; |
| sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2); |
| 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 */ |
| /* clean bogus errors */ |
| ERR_clear_error(); |
| OPENSSL_free(signature); |
| signature = NULL; |
| EC_KEY_free(eckey); |
| eckey = NULL; |
| EC_KEY_free(wrong_eckey); |
| wrong_eckey = NULL; |
| ECDSA_SIG_free(ecdsa_sig); |
| ecdsa_sig = NULL; |
| OPENSSL_free(raw_buf); |
| raw_buf = NULL; |
| } |
| |
| ret = 1; |
| builtin_err: |
| if (eckey) |
| EC_KEY_free(eckey); |
| if (wrong_eckey) |
| EC_KEY_free(wrong_eckey); |
| if (ecdsa_sig) |
| ECDSA_SIG_free(ecdsa_sig); |
| if (signature) |
| OPENSSL_free(signature); |
| if (raw_buf) |
| OPENSSL_free(raw_buf); |
| 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 |
