95c29f3cd1
Initial fork from f2d678e6e89b6508147086610e985d4e8416e867 (1.0.2 beta). (This change contains substantial changes from the original and effectively starts a new history.)
112 lines
3.8 KiB
C
112 lines
3.8 KiB
C
/* ====================================================================
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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/asn1.h>
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#include <openssl/asn1t.h>
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#include <openssl/ec_key.h>
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#include "../ec/internal.h"
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ASN1_SEQUENCE(ECDSA_SIG) = {
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ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM),
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ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM),
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} ASN1_SEQUENCE_END(ECDSA_SIG);
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DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG);
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DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG);
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IMPLEMENT_ASN1_FUNCTIONS_const(ECDSA_SIG);
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size_t ECDSA_size(const EC_KEY *key) {
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size_t ret, i;
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ASN1_INTEGER bs;
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BIGNUM *order = NULL;
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unsigned char buf[4];
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const EC_GROUP *group;
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if (key->ecdsa_meth && key->ecdsa_meth->size) {
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return key->ecdsa_meth->size(key);
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}
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if (key == NULL) {
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return 0;
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}
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group = EC_KEY_get0_group(key);
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if (group == NULL) {
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return 0;
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}
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order = BN_new();
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if (order == NULL) {
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return 0;
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}
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if (!EC_GROUP_get_order(group, order, NULL)) {
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BN_clear_free(order);
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return 0;
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}
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i = BN_num_bits(order);
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bs.length = (i + 7) / 8;
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bs.data = buf;
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bs.type = V_ASN1_INTEGER;
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/* If the top bit is set the ASN.1 encoding is 1 larger. */
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buf[0] = 0xff;
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i = i2d_ASN1_INTEGER(&bs, NULL);
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i += i; /* r and s */
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ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
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BN_clear_free(order);
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return ret;
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}
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