310 lines
9.4 KiB
C
310 lines
9.4 KiB
C
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/* ====================================================================
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* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com). */
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#include <openssl/ecdsa.h>
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#include <openssl/bio.h>
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#include <openssl/bn.h>
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#include <openssl/ec.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include <openssl/rand.h>
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int test_builtin(BIO *out) {
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size_t n = 0;
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EC_KEY *eckey = NULL, *wrong_eckey = NULL;
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EC_GROUP *group;
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ECDSA_SIG *ecdsa_sig = NULL;
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unsigned char digest[20], wrong_digest[20];
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unsigned char *signature = NULL;
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const unsigned char *sig_ptr;
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unsigned char *sig_ptr2;
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unsigned char *raw_buf = NULL;
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unsigned int sig_len, degree, r_len, s_len, bn_len, buf_len;
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int nid, ret = 0;
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/* fill digest values with some random data */
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if (!RAND_pseudo_bytes(digest, 20) || !RAND_pseudo_bytes(wrong_digest, 20)) {
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BIO_printf(out, "ERROR: unable to get random data\n");
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goto builtin_err;
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}
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/* create and verify a ecdsa signature with every availble curve
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* (with ) */
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BIO_printf(out,
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"\ntesting ECDSA_sign() and ECDSA_verify() "
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"with some internal curves:\n");
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static const int kCurveNIDs[] = {NID_secp224r1, NID_X9_62_prime256v1,
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NID_secp384r1, NID_secp521r1, NID_undef};
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/* now create and verify a signature for every curve */
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for (n = 0; kCurveNIDs[n] != NID_undef; n++) {
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unsigned char dirt, offset;
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nid = kCurveNIDs[n];
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/* create new ecdsa key (== EC_KEY) */
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eckey = EC_KEY_new();
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if (eckey == NULL) {
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goto builtin_err;
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}
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group = EC_GROUP_new_by_curve_name(nid);
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if (group == NULL) {
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goto builtin_err;
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}
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if (!EC_KEY_set_group(eckey, group)) {
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goto builtin_err;
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}
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EC_GROUP_free(group);
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degree = EC_GROUP_get_degree(EC_KEY_get0_group(eckey));
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if (degree < 160) {
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/* Too small to test. */
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EC_KEY_free(eckey);
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eckey = NULL;
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continue;
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}
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BIO_printf(out, "%s: ", OBJ_nid2sn(nid));
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/* create key */
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if (!EC_KEY_generate_key(eckey)) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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/* create second key */
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wrong_eckey = EC_KEY_new();
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if (wrong_eckey == NULL) {
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goto builtin_err;
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}
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group = EC_GROUP_new_by_curve_name(nid);
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if (group == NULL) {
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goto builtin_err;
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}
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if (EC_KEY_set_group(wrong_eckey, group) == 0) {
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goto builtin_err;
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}
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EC_GROUP_free(group);
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if (!EC_KEY_generate_key(wrong_eckey)) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* check key */
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if (!EC_KEY_check_key(eckey)) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* create signature */
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sig_len = ECDSA_size(eckey);
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signature = OPENSSL_malloc(sig_len);
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if (signature == NULL) {
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goto builtin_err;
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}
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if (!ECDSA_sign(0, digest, 20, signature, &sig_len, eckey)) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* verify signature */
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* verify signature with the wrong key */
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if (ECDSA_verify(0, digest, 20, signature, sig_len, wrong_eckey) == 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* wrong digest */
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if (ECDSA_verify(0, wrong_digest, 20, signature, sig_len, eckey) == 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* wrong length */
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if (ECDSA_verify(0, digest, 20, signature, sig_len - 1, eckey) == 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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/* Modify a single byte of the signature: to ensure we don't
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* garble the ASN1 structure, we read the raw signature and
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* modify a byte in one of the bignums directly. */
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sig_ptr = signature;
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ecdsa_sig = d2i_ECDSA_SIG(NULL, &sig_ptr, sig_len);
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if (ecdsa_sig == NULL) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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/* Store the two BIGNUMs in raw_buf. */
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r_len = BN_num_bytes(ecdsa_sig->r);
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s_len = BN_num_bytes(ecdsa_sig->s);
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bn_len = (degree + 7) / 8;
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if (r_len > bn_len || s_len > bn_len) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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buf_len = 2 * bn_len;
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raw_buf = OPENSSL_malloc(buf_len);
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if (raw_buf == NULL) {
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goto builtin_err;
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}
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/* Pad the bignums with leading zeroes. */
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memset(raw_buf, 0, buf_len);
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BN_bn2bin(ecdsa_sig->r, raw_buf + bn_len - r_len);
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BN_bn2bin(ecdsa_sig->s, raw_buf + buf_len - s_len);
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/* Modify a single byte in the buffer. */
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offset = raw_buf[10] % buf_len;
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dirt = raw_buf[11] ? raw_buf[11] : 1;
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raw_buf[offset] ^= dirt;
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/* Now read the BIGNUMs back in from raw_buf. */
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if (BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL ||
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BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL) {
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goto builtin_err;
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}
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sig_ptr2 = signature;
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sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) == 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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/* Sanity check: undo the modification and verify signature. */
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raw_buf[offset] ^= dirt;
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if (BN_bin2bn(raw_buf, bn_len, ecdsa_sig->r) == NULL ||
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BN_bin2bn(raw_buf + bn_len, bn_len, ecdsa_sig->s) == NULL) {
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goto builtin_err;
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}
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sig_ptr2 = signature;
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sig_len = i2d_ECDSA_SIG(ecdsa_sig, &sig_ptr2);
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if (ECDSA_verify(0, digest, 20, signature, sig_len, eckey) != 1) {
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BIO_printf(out, " failed\n");
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goto builtin_err;
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}
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BIO_printf(out, ".");
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(void)BIO_flush(out);
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BIO_printf(out, " ok\n");
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/* cleanup */
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/* clean bogus errors */
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ERR_clear_error();
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OPENSSL_free(signature);
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signature = NULL;
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EC_KEY_free(eckey);
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eckey = NULL;
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EC_KEY_free(wrong_eckey);
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wrong_eckey = NULL;
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ECDSA_SIG_free(ecdsa_sig);
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ecdsa_sig = NULL;
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OPENSSL_free(raw_buf);
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raw_buf = NULL;
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}
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ret = 1;
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builtin_err:
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if (eckey)
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EC_KEY_free(eckey);
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if (wrong_eckey)
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EC_KEY_free(wrong_eckey);
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if (ecdsa_sig)
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ECDSA_SIG_free(ecdsa_sig);
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if (signature)
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OPENSSL_free(signature);
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if (raw_buf)
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OPENSSL_free(raw_buf);
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return ret;
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}
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int main(void) {
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int ret = 1;
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BIO *out;
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out = BIO_new_fp(stdout, BIO_NOCLOSE);
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ERR_load_crypto_strings();
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if (!test_builtin(out))
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goto err;
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ret = 0;
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err:
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if (ret)
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BIO_printf(out, "\nECDSA test failed\n");
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else
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BIO_printf(out, "\nPASS\n");
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if (ret)
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BIO_print_errors(out);
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if (out != NULL)
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BIO_free(out);
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return ret;
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}
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