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/* dsa.h
*
* Copyright (C) 2006-2020 wolfSSL Inc.
*
* This file is part of wolfSSL.
*
* 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 02110-1335, USA
*/
/*!
\file wolfssl/wolfcrypt/dsa.h
*/
#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
#define DsaKeyToDer wc_DsaKeyToDer
#ifdef __cplusplus
extern "C" {
#endif
enum {
DSA_PUBLIC = 0,
DSA_PRIVATE = 1
};
enum {
DSA_HALF_SIZE = 20, /* r and s size */
DSA_SIG_SIZE = 40 /* signature size */
};
/* DSA */
typedef struct DsaKey {
mp_int p, q, g, y, x;
int type; /* public or private */
void* heap; /* memory hint */
} DsaKey;
WOLFSSL_API int wc_InitDsaKey(DsaKey* key);
WOLFSSL_API int wc_InitDsaKey_h(DsaKey* key, void* h);
WOLFSSL_API void wc_FreeDsaKey(DsaKey* key);
WOLFSSL_API int wc_DsaSign(const byte* digest, byte* out,
DsaKey* key, WC_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);
WOLFSSL_API int wc_DsaKeyToDer(DsaKey* key, byte* output, word32 inLen);
WOLFSSL_API int wc_SetDsaPublicKey(byte* output, DsaKey* key,
int outLen, int with_header);
WOLFSSL_API int wc_DsaKeyToPublicDer(DsaKey* key, byte* output, word32 inLen);
#ifdef WOLFSSL_KEY_GEN
WOLFSSL_API int wc_MakeDsaKey(WC_RNG *rng, DsaKey *dsa);
WOLFSSL_API int wc_MakeDsaParameters(WC_RNG *rng, int modulus_size, DsaKey *dsa);
#endif
/* raw export functions */
WOLFSSL_API int wc_DsaImportParamsRaw(DsaKey* dsa, const char* p,
const char* q, const char* g);
WOLFSSL_API int wc_DsaImportParamsRawCheck(DsaKey* dsa, const char* p,
const char* q, const char* g,
int trusted, WC_RNG* rng);
WOLFSSL_API int wc_DsaExportParamsRaw(DsaKey* dsa, byte* p, word32* pSz,
byte* q, word32* qSz, byte* g,
word32* gSz);
WOLFSSL_API int wc_DsaExportKeyRaw(DsaKey* dsa, byte* x, word32* xSz, byte* y,
word32* ySz);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* NO_DSA */
#endif /* WOLF_CRYPT_DSA_H */
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