xref: /openssl/crypto/ec/ecdsa_sign.c (revision 9311d0c4)
1 /*
2  * Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the Apache License 2.0 (the "License").  You may not use
5  * this file except in compliance with the License.  You can obtain a copy
6  * in the file LICENSE in the source distribution or at
7  * https://www.openssl.org/source/license.html
8  */
9 
10 /*
11  * ECDSA low level APIs are deprecated for public use, but still ok for
12  * internal use.
13  */
14 #include "internal/deprecated.h"
15 
16 #include <openssl/ec.h>
17 #include "ec_local.h"
18 #include <openssl/err.h>
19 
ECDSA_do_sign(const unsigned char * dgst,int dlen,EC_KEY * eckey)20 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
21 {
22     return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
23 }
24 
ECDSA_do_sign_ex(const unsigned char * dgst,int dlen,const BIGNUM * kinv,const BIGNUM * rp,EC_KEY * eckey)25 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
26                             const BIGNUM *kinv, const BIGNUM *rp,
27                             EC_KEY *eckey)
28 {
29     if (eckey->meth->sign_sig != NULL)
30         return eckey->meth->sign_sig(dgst, dlen, kinv, rp, eckey);
31     ERR_raise(ERR_LIB_EC, EC_R_OPERATION_NOT_SUPPORTED);
32     return NULL;
33 }
34 
ECDSA_sign(int type,const unsigned char * dgst,int dlen,unsigned char * sig,unsigned int * siglen,EC_KEY * eckey)35 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
36                *sig, unsigned int *siglen, EC_KEY *eckey)
37 {
38     return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
39 }
40 
ECDSA_sign_ex(int type,const unsigned char * dgst,int dlen,unsigned char * sig,unsigned int * siglen,const BIGNUM * kinv,const BIGNUM * r,EC_KEY * eckey)41 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen,
42                   unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv,
43                   const BIGNUM *r, EC_KEY *eckey)
44 {
45     if (eckey->meth->sign != NULL)
46         return eckey->meth->sign(type, dgst, dlen, sig, siglen, kinv, r, eckey);
47     ERR_raise(ERR_LIB_EC, EC_R_OPERATION_NOT_SUPPORTED);
48     return 0;
49 }
50 
ECDSA_sign_setup(EC_KEY * eckey,BN_CTX * ctx_in,BIGNUM ** kinvp,BIGNUM ** rp)51 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
52                      BIGNUM **rp)
53 {
54     if (eckey->meth->sign_setup != NULL)
55         return eckey->meth->sign_setup(eckey, ctx_in, kinvp, rp);
56     ERR_raise(ERR_LIB_EC, EC_R_OPERATION_NOT_SUPPORTED);
57     return 0;
58 }
59