crypto/ec/ecdsa_sign.c

   1 /*
   2  * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 #include <openssl/ec.h>
  11 #include "ec_lcl.h"
  12 #include <openssl/engine.h>
  13 #include <openssl/rand.h>
  14 #include <openssl/err.h>
  15
  16 ECDSA_SIG *ECDSA_do_sign(const unsigned char *dgst, int dlen, EC_KEY *eckey)
  17 {
  18     return ECDSA_do_sign_ex(dgst, dlen, NULL, NULL, eckey);
  19 }
  20
  21 ECDSA_SIG *ECDSA_do_sign_ex(const unsigned char *dgst, int dlen,
  22                             const BIGNUM *kinv, const BIGNUM *rp,
  23                             EC_KEY *eckey)
  24 {
  25     if (eckey->meth->sign_sig != NULL)
  26         return eckey->meth->sign_sig(dgst, dlen, kinv, rp, eckey);
  27     ECerr(EC_F_ECDSA_DO_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  28     return NULL;
  29 }
  30
  31 int ECDSA_sign(int type, const unsigned char *dgst, int dlen, unsigned char
  32                *sig, unsigned int *siglen, EC_KEY *eckey)
  33 {
  34     return ECDSA_sign_ex(type, dgst, dlen, sig, siglen, NULL, NULL, eckey);
  35 }
  36
  37 int ECDSA_sign_ex(int type, const unsigned char *dgst, int dlen,
  38                   unsigned char *sig, unsigned int *siglen, const BIGNUM *kinv,
  39                   const BIGNUM *r, EC_KEY *eckey)
  40 {
  41     if (eckey->meth->sign != NULL)
  42         return eckey->meth->sign(type, dgst, dlen, sig, siglen, kinv, r, eckey);
  43     ECerr(EC_F_ECDSA_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  44     return 0;
  45 }
  46
  47 int ECDSA_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp,
  48                      BIGNUM **rp)
  49 {
  50     if (eckey->meth->sign_setup != NULL)
  51         return eckey->meth->sign_setup(eckey, ctx_in, kinvp, rp);
  52     ECerr(EC_F_ECDSA_SIGN_SETUP, EC_R_OPERATION_NOT_SUPPORTED);
  53     return 0;
  54 }