1 /* crypto/ecdsa/ecdsa_sign.c */ 2 /* ==================================================================== 3 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in 14 * the documentation and/or other materials provided with the 15 * distribution. 16 * 17 * 3. All advertising materials mentioning features or use of this 18 * software must display the following acknowledgment: 19 * "This product includes software developed by the OpenSSL Project 20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 21 * 22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 23 * endorse or promote products derived from this software without 24 * prior written permission. For written permission, please contact 25 * openssl-core (at) OpenSSL.org. 26 * 27 * 5. Products derived from this software may not be called "OpenSSL" 28 * nor may "OpenSSL" appear in their names without prior written 29 * permission of the OpenSSL Project. 30 * 31 * 6. Redistributions of any form whatsoever must retain the following 32 * acknowledgment: 33 * "This product includes software developed by the OpenSSL Project 34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 35 * 36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 47 * OF THE POSSIBILITY OF SUCH DAMAGE. 48 * ==================================================================== 49 * 50 * This product includes cryptographic software written by Eric Young 51 * (eay (at) cryptsoft.com). This product includes software written by Tim 52 * Hudson (tjh (at) cryptsoft.com). 53 * 54 */ 55 56 #include "ecs_locl.h" 57 #ifndef OPENSSL_NO_ENGINE 58 #include <openssl/engine.h> 59 #endif 60 #include <openssl/rand.h> 61 62 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey) 63 { 64 return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey); 65 } 66 67 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen, 68 const BIGNUM *kinv, const BIGNUM *rp, EC_KEY *eckey) 69 { 70 ECDSA_DATA *ecdsa = ecdsa_check(eckey); 71 if (ecdsa == NULL) 72 return NULL; 73 return ecdsa->meth->ecdsa_do_sign(dgst, dlen, kinv, rp, eckey); 74 } 75 76 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char 77 *sig, unsigned int *siglen, EC_KEY *eckey) 78 { 79 return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey); 80 } 81 82 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen, unsigned char 83 *sig, unsigned int *siglen, const BIGNUM *kinv, const BIGNUM *r, 84 EC_KEY *eckey) 85 { 86 ECDSA_SIG *s; 87 RAND_seed(dgst, dlen); 88 s = ECDSA_do_sign_ex(dgst, dlen, kinv, r, eckey); 89 if (s == NULL) 90 { 91 *siglen=0; 92 return 0; 93 } 94 *siglen = i2d_ECDSA_SIG(s, &sig); 95 ECDSA_SIG_free(s); 96 return 1; 97 } 98 99 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, 100 BIGNUM **rp) 101 { 102 ECDSA_DATA *ecdsa = ecdsa_check(eckey); 103 if (ecdsa == NULL) 104 return 0; 105 return ecdsa->meth->ecdsa_sign_setup(eckey, ctx_in, kinvp, rp); 106 } 107
