[thirdparty/openssl.git] / test / ecdsatest.c

/*
 * Copyright 2002-2017 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright (c) 2002, Oracle and/or its affiliates. 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
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_EC is defined */
# include "testutil.h"

#ifndef OPENSSL_NO_EC

# 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 randomness";


/* functions to change the RAND_METHOD */
static int fbytes(unsigned char *buf, int num);

static RAND_METHOD fake_rand;
static const RAND_METHOD *old_rand;

static int change_rand(void)
{
    /* save old rand method */
    if (!TEST_ptr(old_rand = RAND_get_rand_method()))
        return 0;

    fake_rand = *old_rand;
    /* use own random function */
    fake_rand.bytes = fbytes;
    /* set new RAND_METHOD */
    if (!TEST_true(RAND_set_rand_method(&fake_rand)))
        return 0;
    return 1;
}

static int restore_rand(void)
{
    if (!TEST_true(RAND_set_rand_method(old_rand)))
        return 0;
    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"
};

static int fbytes(unsigned char *buf, int num)
{
    int ret = 0;
    BIGNUM *tmp = NULL;

    if (use_fake == 0)
        return old_rand->bytes(buf, num);

    use_fake = 0;

    if (fbytes_counter >= 8)
        return 0;
    if (!TEST_ptr(tmp = BN_new()))
        return 0;
    if (!TEST_true(BN_dec2bn(&tmp, numbers[fbytes_counter]))) {
        BN_free(tmp);
        return 0;
    }
    fbytes_counter++;
    if (TEST_int_eq(BN_num_bytes(tmp), num)
            && TEST_true(BN_bn2bin(tmp, buf)))
        ret = 1;
    BN_free(tmp);
    return ret;
}

/* some tests from the X9.62 draft */
static int x9_62_test_internal(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;
    BIGNUM *kinv = NULL, *rp = NULL;
    const BIGNUM *sig_r, *sig_s;

    if (!TEST_ptr(md_ctx = EVP_MD_CTX_new()))
        goto x962_int_err;

    /* get the message digest */
    if (!TEST_true(EVP_DigestInit(md_ctx, EVP_sha1()))
        || !TEST_true(EVP_DigestUpdate(md_ctx, (const void *)message, 3))
        || !TEST_true(EVP_DigestFinal(md_ctx, digest, &dgst_len)))
        goto x962_int_err;

    TEST_info("testing %s", OBJ_nid2sn(nid));

    /* create the key */
    if (!TEST_ptr(key = EC_KEY_new_by_curve_name(nid)))
        goto x962_int_err;
    use_fake = 1;
    if (!TEST_true(EC_KEY_generate_key(key)))
        goto x962_int_err;

    /* create the signature */
    use_fake = 1;
    /* Use ECDSA_sign_setup to avoid use of ECDSA nonces */
    if (!TEST_true(ECDSA_sign_setup(key, NULL, &kinv, &rp)))
        goto x962_int_err;
    if (!TEST_ptr(signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, key)))
        goto x962_int_err;

    /* compare the created signature with the expected signature */
    if (!TEST_ptr(r = BN_new()) || !TEST_ptr(s = BN_new()))
        goto x962_int_err;
    if (!TEST_true(BN_dec2bn(&r, r_in)) || !TEST_true(BN_dec2bn(&s, s_in)))
        goto x962_int_err;
    ECDSA_SIG_get0(signature, &sig_r, &sig_s);
    if (!TEST_BN_eq(sig_r, r)
            || !TEST_BN_eq(sig_s, s))
        goto x962_int_err;

    /* verify the signature */
    if (!TEST_int_eq(ECDSA_do_verify(digest, 20, signature, key), 1))
        goto x962_int_err;

    ret = 1;

 x962_int_err:
    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;
}

static int x9_62_tests()
{
    int ret = 0;

    /* set own rand method */
    if (!change_rand())
        goto x962_err;

    if (!TEST_true(x9_62_test_internal(NID_X9_62_prime192v1,
                 "3342403536405981729393488334694600415596881826869351677613",
                 "5735822328888155254683894997897571951568553642892029982342")))
        goto x962_err;
    if (!TEST_true(x9_62_test_internal(NID_X9_62_prime239v1,
                 "3086361431751678114926225473006680188549593787585317781474"
                             "62058306432176",
                 "3238135532097973577080787768312505059318910517550078427819"
                             "78505179448783")))
        goto x962_err;

# ifndef OPENSSL_NO_EC2M
    if (!TEST_true(x9_62_test_internal(NID_X9_62_c2tnb191v1,
                 "87194383164871543355722284926904419997237591535066528048",
                 "308992691965804947361541664549085895292153777025772063598")))
        goto x962_err;
    if (!TEST_true(x9_62_test_internal(NID_X9_62_c2tnb239v1,
                 "2159633321041961198501834003903461262881815148684178964245"
                             "5876922391552",
                 "1970303740007316867383349976549972270528498040721988191026"
                             "49413465737174")))
        goto x962_err;
# endif
    ret = 1;

 x962_err:
    if (!TEST_true(restore_rand()))
        ret = 0;
    return ret;
}

static int test_builtin(void)
{
    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 (!TEST_true(RAND_bytes(digest, 20))
            || !TEST_true(RAND_bytes(wrong_digest, 20)))
        goto builtin_err;

    /* create and verify a ecdsa signature with every available curve */
    /* get a list of all internal curves */
    crv_len = EC_get_builtin_curves(NULL, 0);
    if (!TEST_ptr(curves = OPENSSL_malloc(sizeof(*curves) * crv_len))
            || !TEST_true(EC_get_builtin_curves(curves, crv_len)))
        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 (!TEST_ptr(eckey = EC_KEY_new())
                || !TEST_ptr(group = EC_GROUP_new_by_curve_name(nid))
                || !TEST_true(EC_KEY_set_group(eckey, group)))
            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;
        }
        TEST_info("testing %s", OBJ_nid2sn(nid));

        /* create key */
        if (!TEST_true(EC_KEY_generate_key(eckey)))
            goto builtin_err;
        /* create second key */
        if (!TEST_ptr(wrong_eckey = EC_KEY_new())
                || !TEST_ptr(group = EC_GROUP_new_by_curve_name(nid))
                || !TEST_true(EC_KEY_set_group(wrong_eckey, group)))
            goto builtin_err;
        EC_GROUP_free(group);
        if (!TEST_true(EC_KEY_generate_key(wrong_eckey)))
            goto builtin_err;

        /* check key */
        if (!TEST_true(EC_KEY_check_key(eckey)))
            goto builtin_err;

        /* create signature */
        sig_len = ECDSA_size(eckey);
        if (!TEST_ptr(signature = OPENSSL_malloc(sig_len))
                || !TEST_true(ECDSA_sign(0, digest, 20, signature, &sig_len,
                                         eckey)))
            goto builtin_err;

        /* verify signature */
        if (!TEST_int_eq(ECDSA_verify(0, digest, 20, signature, sig_len,
                                      eckey), 1))
            goto builtin_err;

        /* verify signature with the wrong key */
        if (!TEST_int_ne(ECDSA_verify(0, digest, 20, signature, sig_len,
                                      wrong_eckey), 1))
            goto builtin_err;

        /* wrong digest */
        if (!TEST_int_ne(ECDSA_verify(0, wrong_digest, 20, signature,
                                      sig_len, eckey), 1))
            goto builtin_err;

        /* wrong length */
        if (!TEST_int_ne(ECDSA_verify(0, digest, 20, signature,
                                      sig_len - 1, eckey), 1))
            goto builtin_err;

        /*
         * 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 (!TEST_ptr(ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)))
            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 (!TEST_false(r_len > bn_len)
                || !TEST_false(s_len > bn_len))
            goto builtin_err;
        buf_len = 2 * bn_len;
        if (!TEST_ptr(raw_buf = OPENSSL_zalloc(buf_len)))
            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. */
        if (!TEST_ptr(modified_sig = ECDSA_SIG_new()))
            goto builtin_err;
        if (!TEST_ptr(modified_r = BN_bin2bn(raw_buf, bn_len, NULL))
                || !TEST_ptr(modified_s = BN_bin2bn(raw_buf + bn_len,
                                                    bn_len, NULL))
                || !TEST_true(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 (!TEST_false(ECDSA_verify(0, digest, 20, signature, sig_len, eckey)))
            goto builtin_err;

        /* Sanity check: undo the modification and verify signature. */
        raw_buf[offset] ^= dirt;
        if (!TEST_ptr(unmodified_r = BN_bin2bn(raw_buf, bn_len, NULL))
                || !TEST_ptr(unmodified_s = BN_bin2bn(raw_buf + bn_len,
                                                       bn_len, NULL))
                || !TEST_true(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 (!TEST_true(ECDSA_verify(0, digest, 20, signature, sig_len, eckey)))
            goto builtin_err;

        /* cleanup */
        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;
}
#endif

int setup_tests(void)
{
#ifdef OPENSSL_NO_EC
    TEST_note("Elliptic curves are disabled.");
#else
    /* initialize the prng */
    RAND_seed(rnd_seed, sizeof(rnd_seed));
    ADD_TEST(x9_62_tests);
    ADD_TEST(test_builtin);
#endif
    return 1;
}
Commit	Line	Data
2b32b281	1	/*
ad887416	2	* Copyright 2002-2017 The OpenSSL Project Authors. All Rights Reserved.
aa8f3d76	3	* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
4d94ae00	4	*
440e5d80 RS	5	* Licensed under the OpenSSL license (the "License"). You may not use
	6	* this file except in compliance with the License. You can obtain a copy
	7	* in the file LICENSE in the source distribution or at
	8	* https://www.openssl.org/source/license.html
4d94ae00	9	*/
440e5d80	10
4d94ae00 BM	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <string.h>
4d94ae00	14
10bf4fc2	15	#include <openssl/opensslconf.h> /* To see if OPENSSL_NO_EC is defined */
1297ef99	16	# include "testutil.h"
3b6aa36c	17
a69de3f2	18	#ifndef OPENSSL_NO_EC
4d94ae00	19
0f113f3e MC	20	# include <openssl/crypto.h>
	21	# include <openssl/bio.h>
	22	# include <openssl/evp.h>
	23	# include <openssl/bn.h>
fb29bb59	24	# include <openssl/ec.h>
0f113f3e MC	25	# ifndef OPENSSL_NO_ENGINE
	26	# include <openssl/engine.h>
	27	# endif
	28	# include <openssl/err.h>
	29	# include <openssl/rand.h>
690ecff7	30
f367ac2b RS	31	static const char rnd_seed[] =
f367ac2b RS	32	"string to make the random number generator think it has randomness";
2b32b281	33
2b32b281 BM	34
2b32b281 BM	35	/* functions to change the RAND_METHOD */
b66411f6	36	static int fbytes(unsigned char *buf, int num);
2b32b281	37
df2ee0e2 BL	38	static RAND_METHOD fake_rand;
df2ee0e2 BL	39	static const RAND_METHOD *old_rand;
2b32b281	40
b66411f6	41	static int change_rand(void)
0f113f3e MC	42	{
0f113f3e MC	43	/* save old rand method */
b66411f6	44	if (!TEST_ptr(old_rand = RAND_get_rand_method()))
0f113f3e MC	45	return 0;
0f113f3e MC	46
b66411f6	47	fake_rand = *old_rand;
0f113f3e MC	48	/* use own random function */
0f113f3e MC	49	fake_rand.bytes = fbytes;
0f113f3e	50	/* set new RAND_METHOD */
b66411f6	51	if (!TEST_true(RAND_set_rand_method(&fake_rand)))
0f113f3e MC	52	return 0;
	53	return 1;
	54	}
2b32b281	55
b66411f6	56	static int restore_rand(void)
0f113f3e	57	{
b66411f6	58	if (!TEST_true(RAND_set_rand_method(old_rand)))
0f113f3e	59	return 0;
b66411f6	60	return 1;
0f113f3e	61	}
4d94ae00	62
d80399a3	63	static int fbytes_counter = 0, use_fake = 0;
2b32b281	64	static const char *numbers[8] = {
0f113f3e MC	65	"651056770906015076056810763456358567190100156695615665659",
	66	"6140507067065001063065065565667405560006161556565665656654",
	67	"8763001015071075675010661307616710783570106710677817767166"
	68	"71676178726717",
	69	"7000000175690566466555057817571571075705015757757057795755"
	70	"55657156756655",
	71	"1275552191113212300012030439187146164646146646466749494799",
	72	"1542725565216523985789236956265265265235675811949404040041",
	73	"1456427555219115346513212300075341203043918714616464614664"
	74	"64667494947990",
	75	"1712787255652165239672857892369562652652652356758119494040"
	76	"40041670216363"
	77	};
2b32b281	78
b66411f6	79	static int fbytes(unsigned char *buf, int num)
0f113f3e	80	{
b66411f6	81	int ret = 0;
0f113f3e MC	82	BIGNUM *tmp = NULL;
	83
	84	if (use_fake == 0)
	85	return old_rand->bytes(buf, num);
	86
	87	use_fake = 0;
	88
	89	if (fbytes_counter >= 8)
	90	return 0;
b66411f6	91	if (!TEST_ptr(tmp = BN_new()))
0f113f3e	92	return 0;
b66411f6	93	if (!TEST_true(BN_dec2bn(&tmp, numbers[fbytes_counter]))) {
0f113f3e MC	94	BN_free(tmp);
	95	return 0;
	96	}
	97	fbytes_counter++;
b66411f6 RS	98	if (TEST_int_eq(BN_num_bytes(tmp), num)
b66411f6 RS	99	&& TEST_true(BN_bn2bin(tmp, buf)))
0f113f3e MC	100	ret = 1;
	101	BN_free(tmp);
	102	return ret;
	103	}
2b32b281 BM	104
2b32b281 BM	105	/* some tests from the X9.62 draft */
b66411f6	106	static int x9_62_test_internal(int nid, const char r_in, const char s_in)
0f113f3e MC	107	{
	108	int ret = 0;
	109	const char message[] = "abc";
	110	unsigned char digest[20];
	111	unsigned int dgst_len = 0;
b66411f6	112	EVP_MD_CTX *md_ctx;
0f113f3e MC	113	EC_KEY *key = NULL;
	114	ECDSA_SIG *signature = NULL;
	115	BIGNUM r = NULL, s = NULL;
	116	BIGNUM kinv = NULL, rp = NULL;
9267c11b	117	const BIGNUM sig_r, sig_s;
0f113f3e	118
b66411f6	119	if (!TEST_ptr(md_ctx = EVP_MD_CTX_new()))
6e59a892 RL	120	goto x962_int_err;
6e59a892 RL	121
0f113f3e	122	/* get the message digest */
b66411f6 RS	123	if (!TEST_true(EVP_DigestInit(md_ctx, EVP_sha1()))
	124	\|\| !TEST_true(EVP_DigestUpdate(md_ctx, (const void *)message, 3))
	125	\|\| !TEST_true(EVP_DigestFinal(md_ctx, digest, &dgst_len)))
0f113f3e MC	126	goto x962_int_err;
0f113f3e MC	127
b66411f6 RS	128	TEST_info("testing %s", OBJ_nid2sn(nid));
b66411f6 RS	129
0f113f3e	130	/* create the key */
b66411f6	131	if (!TEST_ptr(key = EC_KEY_new_by_curve_name(nid)))
0f113f3e MC	132	goto x962_int_err;
0f113f3e MC	133	use_fake = 1;
b66411f6	134	if (!TEST_true(EC_KEY_generate_key(key)))
0f113f3e	135	goto x962_int_err;
b66411f6	136
0f113f3e MC	137	/* create the signature */
	138	use_fake = 1;
	139	/* Use ECDSA_sign_setup to avoid use of ECDSA nonces */
b66411f6	140	if (!TEST_true(ECDSA_sign_setup(key, NULL, &kinv, &rp)))
0f113f3e	141	goto x962_int_err;
b66411f6	142	if (!TEST_ptr(signature = ECDSA_do_sign_ex(digest, 20, kinv, rp, key)))
0f113f3e	143	goto x962_int_err;
b66411f6	144
0f113f3e	145	/* compare the created signature with the expected signature */
b66411f6	146	if (!TEST_ptr(r = BN_new()) \|\| !TEST_ptr(s = BN_new()))
0f113f3e	147	goto x962_int_err;
b66411f6	148	if (!TEST_true(BN_dec2bn(&r, r_in)) \|\| !TEST_true(BN_dec2bn(&s, s_in)))
0f113f3e	149	goto x962_int_err;
9267c11b	150	ECDSA_SIG_get0(signature, &sig_r, &sig_s);
dc352c19 P	151	if (!TEST_BN_eq(sig_r, r)
dc352c19 P	152	\|\| !TEST_BN_eq(sig_s, s))
0f113f3e	153	goto x962_int_err;
b66411f6	154
0f113f3e	155	/* verify the signature */
b66411f6	156	if (!TEST_int_eq(ECDSA_do_verify(digest, 20, signature, key), 1))
0f113f3e	157	goto x962_int_err;
0f113f3e	158
0f113f3e	159	ret = 1;
b66411f6	160
0f113f3e	161	x962_int_err:
8fdc3734	162	EC_KEY_free(key);
25aaa98a	163	ECDSA_SIG_free(signature);
23a1d5e9 RS	164	BN_free(r);
23a1d5e9 RS	165	BN_free(s);
bfb0641f	166	EVP_MD_CTX_free(md_ctx);
23a1d5e9 RS	167	BN_clear_free(kinv);
23a1d5e9 RS	168	BN_clear_free(rp);
0f113f3e MC	169	return ret;
0f113f3e MC	170	}
4d94ae00	171
b66411f6	172	static int x9_62_tests()
0f113f3e MC	173	{
	174	int ret = 0;
	175
0f113f3e MC	176	/* set own rand method */
	177	if (!change_rand())
	178	goto x962_err;
	179
b66411f6 RS	180	if (!TEST_true(x9_62_test_internal(NID_X9_62_prime192v1,
	181	"3342403536405981729393488334694600415596881826869351677613",
	182	"5735822328888155254683894997897571951568553642892029982342")))
0f113f3e	183	goto x962_err;
b66411f6 RS	184	if (!TEST_true(x9_62_test_internal(NID_X9_62_prime239v1,
b66411f6 RS	185	"3086361431751678114926225473006680188549593787585317781474"
0f113f3e	186	"62058306432176",
b66411f6 RS	187	"3238135532097973577080787768312505059318910517550078427819"
b66411f6 RS	188	"78505179448783")))
0f113f3e	189	goto x962_err;
b66411f6	190
0f113f3e	191	# ifndef OPENSSL_NO_EC2M
b66411f6 RS	192	if (!TEST_true(x9_62_test_internal(NID_X9_62_c2tnb191v1,
	193	"87194383164871543355722284926904419997237591535066528048",
	194	"308992691965804947361541664549085895292153777025772063598")))
0f113f3e	195	goto x962_err;
b66411f6 RS	196	if (!TEST_true(x9_62_test_internal(NID_X9_62_c2tnb239v1,
b66411f6 RS	197	"2159633321041961198501834003903461262881815148684178964245"
0f113f3e	198	"5876922391552",
b66411f6 RS	199	"1970303740007316867383349976549972270528498040721988191026"
b66411f6 RS	200	"49413465737174")))
0f113f3e MC	201	goto x962_err;
	202	# endif
	203	ret = 1;
b66411f6	204
0f113f3e	205	x962_err:
b66411f6	206	if (!TEST_true(restore_rand()))
0f113f3e MC	207	ret = 0;
	208	return ret;
	209	}
2b32b281	210
b66411f6	211	static int test_builtin(void)
0f113f3e MC	212	{
	213	EC_builtin_curve *curves = NULL;
	214	size_t crv_len = 0, n = 0;
	215	EC_KEY eckey = NULL, wrong_eckey = NULL;
	216	EC_GROUP *group;
9267c11b	217	ECDSA_SIG ecdsa_sig = NULL, modified_sig = NULL;
0f113f3e MC	218	unsigned char digest[20], wrong_digest[20];
	219	unsigned char *signature = NULL;
	220	const unsigned char *sig_ptr;
	221	unsigned char *sig_ptr2;
	222	unsigned char *raw_buf = NULL;
9267c11b EK	223	const BIGNUM sig_r, sig_s;
	224	BIGNUM modified_r = NULL, modified_s = NULL;
	225	BIGNUM unmodified_r = NULL, unmodified_s = NULL;
0f113f3e MC	226	unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len;
	227	int nid, ret = 0;
	228
	229	/* fill digest values with some random data */
b66411f6 RS	230	if (!TEST_true(RAND_bytes(digest, 20))
b66411f6 RS	231	\|\| !TEST_true(RAND_bytes(wrong_digest, 20)))
0f113f3e	232	goto builtin_err;
0f113f3e	233
b66411f6	234	/* create and verify a ecdsa signature with every available curve */
0f113f3e MC	235	/* get a list of all internal curves */
0f113f3e MC	236	crv_len = EC_get_builtin_curves(NULL, 0);
b66411f6 RS	237	if (!TEST_ptr(curves = OPENSSL_malloc(sizeof(curves) crv_len))
b66411f6 RS	238	\|\| !TEST_true(EC_get_builtin_curves(curves, crv_len)))
0f113f3e	239	goto builtin_err;
0f113f3e MC	240
	241	/* now create and verify a signature for every curve */
	242	for (n = 0; n < crv_len; n++) {
	243	unsigned char dirt, offset;
	244
	245	nid = curves[n].nid;
4a5bbc4e	246	if (nid == NID_ipsec4 \|\| nid == NID_X25519)
0f113f3e MC	247	continue;
0f113f3e MC	248	/* create new ecdsa key (== EC_KEY) */
b66411f6 RS	249	if (!TEST_ptr(eckey = EC_KEY_new())
	250	\|\| !TEST_ptr(group = EC_GROUP_new_by_curve_name(nid))
	251	\|\| !TEST_true(EC_KEY_set_group(eckey, group)))
0f113f3e MC	252	goto builtin_err;
	253	EC_GROUP_free(group);
	254	degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey));
8fdc3734	255	if (degree < 160) {
0f113f3e	256	/* drop the curve */
0f113f3e MC	257	EC_KEY_free(eckey);
	258	eckey = NULL;
	259	continue;
	260	}
b66411f6 RS	261	TEST_info("testing %s", OBJ_nid2sn(nid));
b66411f6 RS	262
0f113f3e	263	/* create key */
b66411f6	264	if (!TEST_true(EC_KEY_generate_key(eckey)))
0f113f3e	265	goto builtin_err;
0f113f3e	266	/* create second key */
b66411f6 RS	267	if (!TEST_ptr(wrong_eckey = EC_KEY_new())
	268	\|\| !TEST_ptr(group = EC_GROUP_new_by_curve_name(nid))
	269	\|\| !TEST_true(EC_KEY_set_group(wrong_eckey, group)))
0f113f3e MC	270	goto builtin_err;
0f113f3e MC	271	EC_GROUP_free(group);
b66411f6	272	if (!TEST_true(EC_KEY_generate_key(wrong_eckey)))
0f113f3e	273	goto builtin_err;
0f113f3e	274
0f113f3e	275	/* check key */
b66411f6	276	if (!TEST_true(EC_KEY_check_key(eckey)))
0f113f3e	277	goto builtin_err;
b66411f6	278
0f113f3e MC	279	/* create signature */
0f113f3e MC	280	sig_len = ECDSA_size(eckey);
b66411f6 RS	281	if (!TEST_ptr(signature = OPENSSL_malloc(sig_len))
	282	\|\| !TEST_true(ECDSA_sign(0, digest, 20, signature, &sig_len,
	283	eckey)))
0f113f3e	284	goto builtin_err;
b66411f6	285
0f113f3e	286	/* verify signature */
b66411f6 RS	287	if (!TEST_int_eq(ECDSA_verify(0, digest, 20, signature, sig_len,
b66411f6 RS	288	eckey), 1))
0f113f3e	289	goto builtin_err;
b66411f6	290
0f113f3e	291	/* verify signature with the wrong key */
b66411f6 RS	292	if (!TEST_int_ne(ECDSA_verify(0, digest, 20, signature, sig_len,
b66411f6 RS	293	wrong_eckey), 1))
0f113f3e	294	goto builtin_err;
b66411f6	295
0f113f3e	296	/* wrong digest */
b66411f6 RS	297	if (!TEST_int_ne(ECDSA_verify(0, wrong_digest, 20, signature,
b66411f6 RS	298	sig_len, eckey), 1))
0f113f3e	299	goto builtin_err;
b66411f6	300
0f113f3e	301	/* wrong length */
b66411f6 RS	302	if (!TEST_int_ne(ECDSA_verify(0, digest, 20, signature,
b66411f6 RS	303	sig_len - 1, eckey), 1))
0f113f3e	304	goto builtin_err;
0f113f3e MC	305
	306	/*
	307	* Modify a single byte of the signature: to ensure we don't garble
	308	* the ASN1 structure, we read the raw signature and modify a byte in
	309	* one of the bignums directly.
	310	*/
	311	sig_ptr = signature;
b66411f6	312	if (!TEST_ptr(ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len)))
0f113f3e	313	goto builtin_err;
0f113f3e	314
9267c11b	315	ECDSA_SIG_get0(ecdsa_sig, &sig_r, &sig_s);
cf70b8f5	316
0f113f3e	317	/* Store the two BIGNUMs in raw_buf. */
cf70b8f5 DSH	318	r_len = BN_num_bytes(sig_r);
cf70b8f5 DSH	319	s_len = BN_num_bytes(sig_s);
0f113f3e	320	bn_len = (degree + 7) / 8;
b66411f6 RS	321	if (!TEST_false(r_len > bn_len)
b66411f6 RS	322	\|\| !TEST_false(s_len > bn_len))
0f113f3e	323	goto builtin_err;
0f113f3e	324	buf_len = 2 * bn_len;
b66411f6	325	if (!TEST_ptr(raw_buf = OPENSSL_zalloc(buf_len)))
0f113f3e	326	goto builtin_err;
cf70b8f5 DSH	327	BN_bn2bin(sig_r, raw_buf + bn_len - r_len);
cf70b8f5 DSH	328	BN_bn2bin(sig_s, raw_buf + buf_len - s_len);
0f113f3e MC	329
	330	/* Modify a single byte in the buffer. */
	331	offset = raw_buf[10] % buf_len;
	332	dirt = raw_buf[11] ? raw_buf[11] : 1;
	333	raw_buf[offset] ^= dirt;
b66411f6	334
0f113f3e	335	/* Now read the BIGNUMs back in from raw_buf. */
b66411f6	336	if (!TEST_ptr(modified_sig = ECDSA_SIG_new()))
0f113f3e	337	goto builtin_err;
b66411f6 RS	338	if (!TEST_ptr(modified_r = BN_bin2bn(raw_buf, bn_len, NULL))
	339	\|\| !TEST_ptr(modified_s = BN_bin2bn(raw_buf + bn_len,
	340	bn_len, NULL))
	341	\|\| !TEST_true(ECDSA_SIG_set0(modified_sig,
	342	modified_r, modified_s))) {
9267c11b EK	343	BN_free(modified_r);
	344	BN_free(modified_s);
	345	goto builtin_err;
	346	}
0f113f3e	347	sig_ptr2 = signature;
9267c11b	348	sig_len = i2d_ECDSA_SIG(modified_sig, &sig_ptr2);
b66411f6	349	if (!TEST_false(ECDSA_verify(0, digest, 20, signature, sig_len, eckey)))
0f113f3e	350	goto builtin_err;
b66411f6 RS	351
b66411f6 RS	352	/* Sanity check: undo the modification and verify signature. */
0f113f3e	353	raw_buf[offset] ^= dirt;
b66411f6 RS	354	if (!TEST_ptr(unmodified_r = BN_bin2bn(raw_buf, bn_len, NULL))
	355	\|\| !TEST_ptr(unmodified_s = BN_bin2bn(raw_buf + bn_len,
	356	bn_len, NULL))
	357	\|\| !TEST_true(ECDSA_SIG_set0(modified_sig, unmodified_r,
	358	unmodified_s))) {
9267c11b EK	359	BN_free(unmodified_r);
9267c11b EK	360	BN_free(unmodified_s);
0f113f3e	361	goto builtin_err;
9267c11b	362	}
0f113f3e MC	363
0f113f3e MC	364	sig_ptr2 = signature;
9267c11b	365	sig_len = i2d_ECDSA_SIG(modified_sig, &sig_ptr2);
b66411f6	366	if (!TEST_true(ECDSA_verify(0, digest, 20, signature, sig_len, eckey)))
0f113f3e	367	goto builtin_err;
0f113f3e	368
0f113f3e	369	/* cleanup */
0f113f3e MC	370	ERR_clear_error();
	371	OPENSSL_free(signature);
	372	signature = NULL;
	373	EC_KEY_free(eckey);
	374	eckey = NULL;
	375	EC_KEY_free(wrong_eckey);
	376	wrong_eckey = NULL;
	377	ECDSA_SIG_free(ecdsa_sig);
	378	ecdsa_sig = NULL;
9267c11b EK	379	ECDSA_SIG_free(modified_sig);
9267c11b EK	380	modified_sig = NULL;
0f113f3e MC	381	OPENSSL_free(raw_buf);
	382	raw_buf = NULL;
	383	}
	384
	385	ret = 1;
	386	builtin_err:
8fdc3734 RS	387	EC_KEY_free(eckey);
8fdc3734 RS	388	EC_KEY_free(wrong_eckey);
25aaa98a	389	ECDSA_SIG_free(ecdsa_sig);
9267c11b	390	ECDSA_SIG_free(modified_sig);
b548a1f1 RS	391	OPENSSL_free(signature);
	392	OPENSSL_free(raw_buf);
	393	OPENSSL_free(curves);
0f113f3e MC	394
	395	return ret;
	396	}
1297ef99	397	#endif
4d94ae00	398
ad887416	399	int setup_tests(void)
0f113f3e	400	{
a69de3f2 P	401	#ifdef OPENSSL_NO_EC
	402	TEST_note("Elliptic curves are disabled.");
	403	#else
0f113f3e MC	404	/* initialize the prng */
0f113f3e MC	405	RAND_seed(rnd_seed, sizeof(rnd_seed));
b66411f6 RS	406	ADD_TEST(x9_62_tests);
b66411f6 RS	407	ADD_TEST(test_builtin);
a69de3f2	408	#endif
ad887416	409	return 1;
0f113f3e	410	}