diff options
Diffstat (limited to 'openssl-1.1.0h/test/ecdsatest.c')
| -rw-r--r-- | openssl-1.1.0h/test/ecdsatest.c | 519 |
1 files changed, 519 insertions, 0 deletions
diff --git a/openssl-1.1.0h/test/ecdsatest.c b/openssl-1.1.0h/test/ecdsatest.c new file mode 100644 index 0000000..ce73778 --- /dev/null +++ b/openssl-1.1.0h/test/ecdsatest.c @@ -0,0 +1,519 @@ +/* + * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved. + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +/* ==================================================================== + * 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_EC is defined */ + +#ifdef OPENSSL_NO_EC +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/ec.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); + +static RAND_METHOD fake_rand; +static 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, use_fake = 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 (use_fake == 0) + return old_rand->bytes(buf, num); + + use_fake = 0; + + 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; + 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 = EVP_MD_CTX_new(); + EC_KEY *key = NULL; + ECDSA_SIG *signature = NULL; + BIGNUM *r = NULL, *s = NULL; + BIGNUM *kinv = NULL, *rp = NULL; + const BIGNUM *sig_r, *sig_s; + + if (md_ctx == NULL) + goto x962_int_err; + + /* get the message digest */ + if (!EVP_DigestInit(md_ctx, EVP_sha1()) + || !EVP_DigestUpdate(md_ctx, (const void *)message, 3) + || !EVP_DigestFinal(md_ctx, digest, &dgst_len)) + goto x962_int_err; + + 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; + use_fake = 1; + if (!EC_KEY_generate_key(key)) + goto x962_int_err; + BIO_printf(out, "."); + (void)BIO_flush(out); + /* create the signature */ + use_fake = 1; + /* Use ECDSA_sign_setup to avoid use of ECDSA nonces */ + if (!ECDSA_sign_setup(key, NULL, &kinv, &rp)) + goto x962_int_err; + signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, 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; + ECDSA_SIG_get0(signature, &sig_r, &sig_s); + if (BN_cmp(sig_r, r) || BN_cmp(sig_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"); + EC_KEY_free(key); + ECDSA_SIG_free(signature); + BN_free(r); + BN_free(s); + EVP_MD_CTX_free(md_ctx); + BN_clear_free(kinv); + BN_clear_free(rp); + 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, *modified_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; + const BIGNUM *sig_r, *sig_s; + BIGNUM *modified_r = NULL, *modified_s = NULL; + BIGNUM *unmodified_r = NULL, *unmodified_s = 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_bytes(digest, 20) <= 0 || RAND_bytes(wrong_digest, 20) <= 0) { + BIO_printf(out, "ERROR: unable to get random data\n"); + goto builtin_err; + } + + /* + * create and verify a ecdsa signature with every available 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(*curves) * 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 || nid == NID_X25519) + 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; + } + + ECDSA_SIG_get0(ecdsa_sig, &sig_r, &sig_s); + + /* Store the two BIGNUMs in raw_buf. */ + r_len = BN_num_bytes(sig_r); + s_len = BN_num_bytes(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_zalloc(buf_len)) == NULL) + goto builtin_err; + BN_bn2bin(sig_r, raw_buf + bn_len - r_len); + BN_bn2bin(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. */ + modified_sig = ECDSA_SIG_new(); + if (modified_sig == NULL) + goto builtin_err; + if (((modified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL) + || ((modified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL) + || !ECDSA_SIG_set0(modified_sig, modified_r, modified_s)) { + BN_free(modified_r); + BN_free(modified_s); + goto builtin_err; + } + sig_ptr2 = signature; + sig_len = i2d_ECDSA_SIG(modified_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 (((unmodified_r = BN_bin2bn(raw_buf, bn_len, NULL)) == NULL) + || ((unmodified_s = BN_bin2bn(raw_buf + bn_len, bn_len, NULL)) == NULL) + || !ECDSA_SIG_set0(modified_sig, unmodified_r, unmodified_s)) { + BN_free(unmodified_r); + BN_free(unmodified_s); + goto builtin_err; + } + + sig_ptr2 = signature; + sig_len = i2d_ECDSA_SIG(modified_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; + ECDSA_SIG_free(modified_sig); + modified_sig = NULL; + OPENSSL_free(raw_buf); + raw_buf = NULL; + } + + ret = 1; + builtin_err: + EC_KEY_free(eckey); + EC_KEY_free(wrong_eckey); + ECDSA_SIG_free(ecdsa_sig); + ECDSA_SIG_free(modified_sig); + OPENSSL_free(signature); + OPENSSL_free(raw_buf); + OPENSSL_free(curves); + + return ret; +} + +int main(void) +{ + int ret = 1; + BIO *out; + char *p; + + out = BIO_new_fp(stdout, BIO_NOCLOSE | BIO_FP_TEXT); + + p = getenv("OPENSSL_DEBUG_MEMORY"); + if (p != NULL && strcmp(p, "on") == 0) + CRYPTO_set_mem_debug(1); + + /* 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); + +#ifndef OPENSSL_NO_CRYPTO_MDEBUG + if (CRYPTO_mem_leaks(out) <= 0) + ret = 1; +#endif + BIO_free(out); + return ret; +} +#endif |