-/* 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 2002-2019 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
*/
-/* ====================================================================
- * 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 */
+#include "testutil.h"
-#ifdef OPENSSL_NO_EC
-int main(int argc, char *argv[])
-{
- puts("Elliptic curves are disabled.");
- return 0;
-}
-#else
+#ifndef OPENSSL_NO_EC
-# 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/ec.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 *);
+# include "internal/nelem.h"
+# include "ecdsatest.h"
/* functions to change the RAND_METHOD */
-int change_rand(void);
-int restore_rand(void);
-int fbytes(unsigned char *buf, int num);
+static int fbytes(unsigned char *buf, int num);
static RAND_METHOD fake_rand;
static const RAND_METHOD *old_rand;
+static int use_fake = 0;
+static const char *numbers[2];
+static size_t crv_len = 0;
+static EC_builtin_curve *curves = NULL;
-int change_rand(void)
+static int change_rand(void)
{
/* save old rand method */
- if ((old_rand = RAND_get_rand_method()) == NULL)
+ if (!TEST_ptr(old_rand = RAND_get_rand_method()))
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;
+ fake_rand = *old_rand;
/* 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))
+ if (!TEST_true(RAND_set_rand_method(&fake_rand)))
return 0;
return 1;
}
-int restore_rand(void)
+static int restore_rand(void)
{
- if (!RAND_set_rand_method(old_rand))
+ if (!TEST_true(RAND_set_rand_method(old_rand)))
return 0;
- else
- return 1;
+ 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)
+static int fbytes(unsigned char *buf, int num)
{
- int ret;
+ int ret = 0;
+ static int fbytes_counter = 0;
BIGNUM *tmp = NULL;
if (use_fake == 0)
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;
+ if (!TEST_ptr(tmp = BN_new())
+ || !TEST_int_lt(fbytes_counter, OSSL_NELEM(numbers))
+ || !TEST_true(BN_hex2bn(&tmp, numbers[fbytes_counter]))
+ /* tmp might need leading zeros so pad it out */
+ || !TEST_int_le(BN_num_bytes(tmp), num)
+ || !TEST_true(BN_bn2binpad(tmp, buf, num)))
+ goto err;
+
+ fbytes_counter = (fbytes_counter + 1) % OSSL_NELEM(numbers);
+ ret = 1;
+ err:
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)
+/*-
+ * This function hijacks the RNG to feed it the chosen ECDSA key and nonce.
+ * The ECDSA KATs are from:
+ * - the X9.62 draft (4)
+ * - NIST CAVP (720)
+ *
+ * It uses the low-level ECDSA_sign_setup instead of EVP to control the RNG.
+ * NB: This is not how applications should use ECDSA; this is only for testing.
+ *
+ * Tests the library can successfully:
+ * - generate public keys that matches those KATs
+ * - create ECDSA signatures that match those KATs
+ * - accept those signatures as valid
+ */
+static int x9_62_tests(int n)
{
- int ret = 0;
- const char message[] = "abc";
- unsigned char digest[20];
+ int nid, md_nid, ret = 0;
+ const char *r_in = NULL, *s_in = NULL, *tbs = NULL;
+ unsigned char *pbuf = NULL, *qbuf = NULL, *message = NULL;
+ unsigned char digest[EVP_MAX_MD_SIZE];
unsigned int dgst_len = 0;
- EVP_MD_CTX md_ctx;
+ long q_len, msg_len = 0;
+ size_t p_len;
+ EVP_MD_CTX *mctx = NULL;
EC_KEY *key = NULL;
ECDSA_SIG *signature = NULL;
BIGNUM *r = NULL, *s = NULL;
BIGNUM *kinv = NULL, *rp = NULL;
+ const BIGNUM *sig_r = NULL, *sig_s = NULL;
+
+ nid = ecdsa_cavs_kats[n].nid;
+ md_nid = ecdsa_cavs_kats[n].md_nid;
+ r_in = ecdsa_cavs_kats[n].r;
+ s_in = ecdsa_cavs_kats[n].s;
+ tbs = ecdsa_cavs_kats[n].msg;
+ numbers[0] = ecdsa_cavs_kats[n].d;
+ numbers[1] = ecdsa_cavs_kats[n].k;
+
+ TEST_info("ECDSA KATs for curve %s", OBJ_nid2sn(nid));
+
+ if (!TEST_ptr(mctx = EVP_MD_CTX_new())
+ /* get the message digest */
+ || !TEST_ptr(message = OPENSSL_hexstr2buf(tbs, &msg_len))
+ || !TEST_true(EVP_DigestInit_ex(mctx, EVP_get_digestbynid(md_nid), NULL))
+ || !TEST_true(EVP_DigestUpdate(mctx, message, msg_len))
+ || !TEST_true(EVP_DigestFinal_ex(mctx, digest, &dgst_len))
+ /* create the key */
+ || !TEST_ptr(key = EC_KEY_new_by_curve_name(nid))
+ /* load KAT variables */
+ || !TEST_ptr(r = BN_new())
+ || !TEST_ptr(s = BN_new())
+ || !TEST_true(BN_hex2bn(&r, r_in))
+ || !TEST_true(BN_hex2bn(&s, s_in))
+ /* swap the RNG source */
+ || !TEST_true(change_rand()))
+ goto err;
- EVP_MD_CTX_init(&md_ctx);
- /* 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;
+ /* public key must match KAT */
use_fake = 1;
- if (!EC_KEY_generate_key(key))
- goto x962_int_err;
- BIO_printf(out, ".");
- (void)BIO_flush(out);
- /* create the signature */
+ if (!TEST_true(EC_KEY_generate_key(key))
+ || !TEST_true(p_len = EC_KEY_key2buf(key, POINT_CONVERSION_UNCOMPRESSED,
+ &pbuf, NULL))
+ || !TEST_ptr(qbuf = OPENSSL_hexstr2buf(ecdsa_cavs_kats[n].Q, &q_len))
+ || !TEST_int_eq(q_len, p_len)
+ || !TEST_mem_eq(qbuf, q_len, pbuf, p_len))
+ goto err;
+
+ /* create the signature via ECDSA_sign_setup to avoid use of ECDSA nonces */
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);
+ if (!TEST_true(ECDSA_sign_setup(key, NULL, &kinv, &rp))
+ || !TEST_ptr(signature = ECDSA_do_sign_ex(digest, dgst_len,
+ kinv, rp, key))
+ /* verify the signature */
+ || !TEST_int_eq(ECDSA_do_verify(digest, dgst_len, signature, key), 1))
+ goto err;
+
/* 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");
+ ECDSA_SIG_get0(signature, &sig_r, &sig_s);
+ if (!TEST_BN_eq(sig_r, r)
+ || !TEST_BN_eq(sig_s, s))
+ goto err;
+
ret = 1;
- x962_int_err:
- if (!ret)
- BIO_printf(out, " failed\n");
+
+ err:
+ /* restore the RNG source */
+ if (!TEST_true(restore_rand()))
+ ret = 0;
+
+ OPENSSL_free(message);
+ OPENSSL_free(pbuf);
+ OPENSSL_free(qbuf);
EC_KEY_free(key);
ECDSA_SIG_free(signature);
BN_free(r);
BN_free(s);
- EVP_MD_CTX_cleanup(&md_ctx);
+ EVP_MD_CTX_free(mctx);
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)
+/*-
+ * Positive and negative ECDSA testing through EVP interface:
+ * - EVP_DigestSign (this is the one-shot version)
+ * - EVP_DigestVerify
+ *
+ * Tests the library can successfully:
+ * - create a key
+ * - create a signature
+ * - accept that signature
+ * - reject that signature with a different public key
+ * - reject that signature if its length is not correct
+ * - reject that signature after modifying the message
+ * - accept that signature after un-modifying the message
+ * - reject that signature after modifying the signature
+ * - accept that signature after un-modifying the signature
+ */
+static int test_builtin(int n)
{
- 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;
+ EC_KEY *eckey_neg = NULL, *eckey = NULL;
+ unsigned char dirt, offset, tbs[128];
+ unsigned char *sig = NULL;
+ EVP_PKEY *pkey_neg = NULL, *pkey = NULL;
+ EVP_MD_CTX *mctx = NULL;
+ size_t sig_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 availble curve (with )
- */
- BIO_printf(out, "\ntesting ECDSA_sign() and ECDSA_verify() "
- "with some internal curves:\n");
+ nid = curves[n].nid;
- /* 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)
- 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_zalloc(buf_len)) == NULL)
- goto builtin_err;
- 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;
+ /* skip built-in curves where ord(G) is not prime */
+ if (nid == NID_ipsec4 || nid == NID_ipsec3) {
+ TEST_info("skipped: ECDSA unsupported for curve %s", OBJ_nid2sn(nid));
+ return 1;
}
- ret = 1;
- builtin_err:
- EC_KEY_free(eckey);
- EC_KEY_free(wrong_eckey);
- ECDSA_SIG_free(ecdsa_sig);
- OPENSSL_free(signature);
- OPENSSL_free(raw_buf);
- OPENSSL_free(curves);
-
- return ret;
-}
-
-int main(void)
-{
- int ret = 1;
- BIO *out;
-
- out = BIO_new_fp(stdout, BIO_NOCLOSE | BIO_FP_TEXT);
-
- /* 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);
+ TEST_info("testing ECDSA for curve %s", OBJ_nid2sn(nid));
+
+ if (!TEST_ptr(mctx = EVP_MD_CTX_new())
+ /* get some random message data */
+ || !TEST_true(RAND_bytes(tbs, sizeof(tbs)))
+ /* real key */
+ || !TEST_ptr(eckey = EC_KEY_new_by_curve_name(nid))
+ || !TEST_true(EC_KEY_generate_key(eckey))
+ || !TEST_ptr(pkey = EVP_PKEY_new())
+ || !TEST_true(EVP_PKEY_assign_EC_KEY(pkey, eckey))
+ /* fake key for negative testing */
+ || !TEST_ptr(eckey_neg = EC_KEY_new_by_curve_name(nid))
+ || !TEST_true(EC_KEY_generate_key(eckey_neg))
+ || !TEST_ptr(pkey_neg = EVP_PKEY_new())
+ || !TEST_true(EVP_PKEY_assign_EC_KEY(pkey_neg, eckey_neg)))
+ goto err;
- ERR_load_crypto_strings();
+ sig_len = ECDSA_size(eckey);
+
+ if (!TEST_ptr(sig = OPENSSL_malloc(sig_len))
+ /* create a signature */
+ || !TEST_true(EVP_DigestSignInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_true(EVP_DigestSign(mctx, sig, &sig_len, tbs, sizeof(tbs)))
+ || !TEST_int_le(sig_len, ECDSA_size(eckey))
+ /* negative test, verify with wrong key, 0 return */
+ || !TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey_neg))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 0)
+ /* negative test, verify with wrong signature length, -1 return */
+ || !TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len - 1, tbs, sizeof(tbs)), -1)
+ /* positive test, verify with correct key, 1 return */
+ || !TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 1))
+ goto err;
- /* initialize the prng */
- RAND_seed(rnd_seed, sizeof(rnd_seed));
+ /* muck with the message, test it fails with 0 return */
+ tbs[0] ^= 1;
+ if (!TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 0))
+ goto err;
+ /* un-muck and test it verifies */
+ tbs[0] ^= 1;
+ if (!TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 1))
+ goto err;
- /* the tests */
- if (!x9_62_tests(out))
+ /*-
+ * Muck with the ECDSA signature. The DER encoding is one of:
+ * - 30 LL 02 ..
+ * - 30 81 LL 02 ..
+ *
+ * - Sometimes this mucks with the high level DER sequence wrapper:
+ * in that case, DER-parsing of the whole signature should fail.
+ *
+ * - Sometimes this mucks with the DER-encoding of ECDSA.r:
+ * in that case, DER-parsing of ECDSA.r should fail.
+ *
+ * - Sometimes this mucks with the DER-encoding of ECDSA.s:
+ * in that case, DER-parsing of ECDSA.s should fail.
+ *
+ * - Sometimes this mucks with ECDSA.r:
+ * in that case, the signature verification should fail.
+ *
+ * - Sometimes this mucks with ECDSA.s:
+ * in that case, the signature verification should fail.
+ *
+ * The usual case is changing the integer value of ECDSA.r or ECDSA.s.
+ * Because the ratio of DER overhead to signature bytes is small.
+ * So most of the time it will be one of the last two cases.
+ *
+ * In any case, EVP_PKEY_verify should not return 1 for valid.
+ */
+ offset = tbs[0] % sig_len;
+ dirt = tbs[1] ? tbs[1] : 1;
+ sig[offset] ^= dirt;
+ if (!TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_ne(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 1))
goto err;
- if (!test_builtin(out))
+ /* un-muck and test it verifies */
+ sig[offset] ^= dirt;
+ if (!TEST_true(EVP_MD_CTX_reset(mctx))
+ || !TEST_true(EVP_DigestVerifyInit(mctx, NULL, NULL, NULL, pkey))
+ || !TEST_int_eq(EVP_DigestVerify(mctx, sig, sig_len, tbs, sizeof(tbs)), 1))
goto err;
- ret = 0;
+ ret = 1;
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);
- BIO_free(out);
+ EVP_PKEY_free(pkey);
+ EVP_PKEY_free(pkey_neg);
+ EVP_MD_CTX_free(mctx);
+ OPENSSL_free(sig);
return ret;
}
#endif
+
+int setup_tests(void)
+{
+#ifdef OPENSSL_NO_EC
+ TEST_note("Elliptic curves are disabled.");
+#else
+ /* 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)))
+ return 0;
+ ADD_ALL_TESTS(test_builtin, crv_len);
+ ADD_ALL_TESTS(x9_62_tests, OSSL_NELEM(ecdsa_cavs_kats));
+#endif
+ return 1;
+}
+
+void cleanup_tests(void)
+{
+#ifndef OPENSSL_NO_EC
+ OPENSSL_free(curves);
+#endif
+}
projects / openssl.git / blobdiff