crypto/ec/ecdsa_sign.c

   1 /*
   2  * Copyright 2015-2016 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
  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
  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     ECerr(EC_F_ECDSA_DO_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  32     return NULL;
  33 }
  34
  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
  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     ECerr(EC_F_ECDSA_SIGN_EX, EC_R_OPERATION_NOT_SUPPORTED);
  48     return 0;
  49 }
  50
  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     ECerr(EC_F_ECDSA_SIGN_SETUP, EC_R_OPERATION_NOT_SUPPORTED);
  57     return 0;
  58 }