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- /* ====================================================================
- * Copyright (c) 1998-2005 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
- * openssl-core@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). */
-
- #include <openssl/ecdsa.h>
-
- #include <openssl/bio.h>
- #include <openssl/bn.h>
- #include <openssl/crypto.h>
- #include <openssl/ec.h>
- #include <openssl/err.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/rand.h>
-
-
- int test_builtin(BIO *out) {
- size_t 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");
-
- static const int kCurveNIDs[] = {NID_secp224r1, NID_X9_62_prime256v1,
- NID_secp384r1, NID_secp521r1, NID_undef};
-
- /* now create and verify a signature for every curve */
- for (n = 0; kCurveNIDs[n] != NID_undef; n++) {
- unsigned char dirt, offset;
-
- nid = kCurveNIDs[n];
- /* create new ecdsa key (== EC_KEY) */
- eckey = EC_KEY_new();
- if (eckey == 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)) {
- goto builtin_err;
- }
- EC_GROUP_free(group);
- degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey));
- if (degree < 160) {
- /* Too small to test. */
- 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 */
- wrong_eckey = EC_KEY_new();
- if (wrong_eckey == 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);
- signature = OPENSSL_malloc(sig_len);
- if (signature == 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;
- ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len);
- if (ecdsa_sig == 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;
- raw_buf = OPENSSL_malloc(buf_len);
- if (raw_buf == 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);
-
- return ret;
- }
-
- int main(void) {
- int ret = 1;
- BIO *out;
-
- CRYPTO_library_init();
- ERR_load_crypto_strings();
-
- out = BIO_new_fp(stdout, BIO_NOCLOSE);
-
- if (!test_builtin(out))
- goto err;
-
- ret = 0;
-
- err:
- if (ret)
- BIO_printf(out, "\nECDSA test failed\n");
- else
- BIO_printf(out, "\nPASS\n");
- if (ret)
- BIO_print_errors(out);
-
- if (out != NULL)
- BIO_free(out);
-
- return ret;
- }
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