/* dsa.h
 *
 * Copyright (C) 2006-2015 wolfSSL Inc.
 *
 * This file is part of wolfSSL. (formerly known as CyaSSL)
 *
 * wolfSSL is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * wolfSSL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#ifndef WOLF_CRYPT_DSA_H
#define WOLF_CRYPT_DSA_H

#include <wolfssl/wolfcrypt/types.h>

#ifndef NO_DSA

#include <wolfssl/wolfcrypt/integer.h>
#include <wolfssl/wolfcrypt/random.h>

/* for DSA reverse compatibility */
#define InitDsaKey wc_InitDsaKey
#define FreeDsaKey wc_FreeDsaKey
#define DsaSign wc_DsaSign
#define DsaVerify wc_DsaVerify
#define DsaPublicKeyDecode wc_DsaPublicKeyDecode
#define DsaPrivateKeyDecode wc_DsaPrivateKeyDecode

#ifdef __cplusplus
    extern "C" {
#endif


enum {
    DSA_PUBLIC   = 0,
    DSA_PRIVATE  = 1
};

/* DSA */
typedef struct DsaKey {
    mp_int p, q, g, y, x;
    int type;                               /* public or private */
} DsaKey;


WOLFSSL_API void wc_InitDsaKey(DsaKey* key);
WOLFSSL_API void wc_FreeDsaKey(DsaKey* key);

WOLFSSL_API int wc_DsaSign(const byte* digest, byte* out, DsaKey* key, RNG* rng);
WOLFSSL_API int wc_DsaVerify(const byte* digest, const byte* sig, DsaKey* key,
                         int* answer);

WOLFSSL_API int wc_DsaPublicKeyDecode(const byte* input, word32* inOutIdx, DsaKey*,
                                  word32);
WOLFSSL_API int wc_DsaPrivateKeyDecode(const byte* input, word32* inOutIdx, DsaKey*,
                                   word32);

#ifdef __cplusplus
    } /* extern "C" */
#endif

#endif /* NO_DSA */
#endif /* WOLF_CRYPT_DSA_H */