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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/asn1.h>
- #include <openssl/asn1t.h>
- #include <openssl/ec_key.h>
- #include <openssl/mem.h>
-
- #include "../ec/internal.h"
-
-
- DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG);
- DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG);
-
- ASN1_SEQUENCE(ECDSA_SIG) = {
- ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
- ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM),
- } ASN1_SEQUENCE_END(ECDSA_SIG);
-
- IMPLEMENT_ASN1_ENCODE_FUNCTIONS_const_fname(ECDSA_SIG, ECDSA_SIG, ECDSA_SIG);
-
- size_t ECDSA_size(const EC_KEY *key) {
- size_t ret, i, group_order_size;
- ASN1_INTEGER bs;
- BIGNUM *order = NULL;
- unsigned char buf[4];
- const EC_GROUP *group;
-
- if (key->ecdsa_meth && key->ecdsa_meth->group_order_size) {
- group_order_size = key->ecdsa_meth->group_order_size(key);
- } else {
- size_t num_bits;
-
- if (key == NULL) {
- return 0;
- }
- group = EC_KEY_get0_group(key);
- if (group == NULL) {
- return 0;
- }
-
- order = BN_new();
- if (order == NULL) {
- return 0;
- }
- if (!EC_GROUP_get_order(group, order, NULL)) {
- BN_clear_free(order);
- return 0;
- }
-
- num_bits = BN_num_bits(order);
- group_order_size = (num_bits + 7) / 8;
- }
-
- bs.length = group_order_size;
- bs.data = buf;
- bs.type = V_ASN1_INTEGER;
- /* If the top bit is set the ASN.1 encoding is 1 larger. */
- buf[0] = 0xff;
-
- i = i2d_ASN1_INTEGER(&bs, NULL);
- i += i; /* r and s */
- ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
- BN_clear_free(order);
- return ret;
- }
-
- ECDSA_SIG *ECDSA_SIG_new(void) {
- ECDSA_SIG *sig = OPENSSL_malloc(sizeof(ECDSA_SIG));
- if (sig == NULL) {
- return NULL;
- }
- sig->r = BN_new();
- sig->s = BN_new();
- if (sig->r == NULL || sig->s == NULL) {
- ECDSA_SIG_free(sig);
- return NULL;
- }
- return sig;
- }
-
- void ECDSA_SIG_free(ECDSA_SIG *sig) {
- if (sig == NULL) {
- return;
- }
-
- BN_free(sig->r);
- BN_free(sig->s);
- OPENSSL_free(sig);
- }
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