| /* ==================================================================== |
| * 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 "../ec/internal.h" |
| |
| |
| ASN1_SEQUENCE(ECDSA_SIG) = { |
| ASN1_SIMPLE(ECDSA_SIG, r, CBIGNUM), |
| ASN1_SIMPLE(ECDSA_SIG, s, CBIGNUM), |
| } ASN1_SEQUENCE_END(ECDSA_SIG); |
| |
| DECLARE_ASN1_FUNCTIONS_const(ECDSA_SIG); |
| DECLARE_ASN1_ENCODE_FUNCTIONS_const(ECDSA_SIG, ECDSA_SIG); |
| IMPLEMENT_ASN1_FUNCTIONS_const(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; |
| } |