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/* hmac.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 NO_HMAC
#ifndef WOLF_CRYPT_HMAC_H
#define WOLF_CRYPT_HMAC_H
#include <wolfssl/wolfcrypt/types.h>
#ifndef NO_MD5
#include <wolfssl/wolfcrypt/md5.h>
#endif
#ifndef NO_SHA
#include <wolfssl/wolfcrypt/sha.h>
#endif
#ifndef NO_SHA256
#include <wolfssl/wolfcrypt/sha256.h>
#endif
#ifdef WOLFSSL_SHA512
#include <wolfssl/wolfcrypt/sha512.h>
#endif
#ifdef HAVE_BLAKE2
#include <wolfssl/wolfcrypt/blake2.h>
#endif
#ifdef HAVE_FIPS
/* for fips */
#include <cyassl/ctaocrypt/hmac.h>
#endif
#ifdef HAVE_CAVIUM
#include <wolfssl/wolfcrypt/logging.h>
#include "cavium_common.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef HAVE_FIPS
#define WOLFSSL_HMAC_CAVIUM_MAGIC 0xBEEF0005
enum {
HMAC_FIPS_MIN_KEY = 14, /* 112 bit key length minimum */
IPAD = 0x36,
OPAD = 0x5C,
/* If any hash is not enabled, add the ID here. */
#ifdef NO_MD5
MD5 = 0,
#endif
#ifdef NO_SHA
SHA = 1,
#endif
#ifdef NO_SHA256
SHA256 = 2,
#endif
#ifndef WOLFSSL_SHA512
SHA512 = 4,
#endif
#ifndef WOLFSSL_SHA384
SHA384 = 5,
#endif
#ifndef HAVE_BLAKE2
BLAKE2B_ID = 7,
#endif
/* Select the largest available hash for the buffer size. */
#if defined(WOLFSSL_SHA512)
MAX_DIGEST_SIZE = SHA512_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA512_BLOCK_SIZE
#elif defined(HAVE_BLAKE2)
MAX_DIGEST_SIZE = BLAKE2B_OUTBYTES,
HMAC_BLOCK_SIZE = BLAKE2B_BLOCKBYTES,
#elif defined(WOLFSSL_SHA384)
MAX_DIGEST_SIZE = SHA384_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA384_BLOCK_SIZE
#elif !defined(NO_SHA256)
MAX_DIGEST_SIZE = SHA256_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA256_BLOCK_SIZE
#elif !defined(NO_SHA)
MAX_DIGEST_SIZE = SHA_DIGEST_SIZE,
HMAC_BLOCK_SIZE = SHA_BLOCK_SIZE
#elif !defined(NO_MD5)
MAX_DIGEST_SIZE = MD5_DIGEST_SIZE,
HMAC_BLOCK_SIZE = MD5_BLOCK_SIZE
#else
#error "You have to have some kind of hash if you want to use HMAC."
#endif
};
/* hash union */
typedef union {
#ifndef NO_MD5
Md5 md5;
#endif
#ifndef NO_SHA
Sha sha;
#endif
#ifndef NO_SHA256
Sha256 sha256;
#endif
#ifdef WOLFSSL_SHA384
Sha384 sha384;
#endif
#ifdef WOLFSSL_SHA512
Sha512 sha512;
#endif
#ifdef HAVE_BLAKE2
Blake2b blake2b;
#endif
} Hash;
/* Hmac digest */
typedef struct Hmac {
Hash hash;
word32 ipad[HMAC_BLOCK_SIZE / sizeof(word32)]; /* same block size all*/
word32 opad[HMAC_BLOCK_SIZE / sizeof(word32)];
word32 innerHash[MAX_DIGEST_SIZE / sizeof(word32)];
byte macType; /* md5 sha or sha256 */
byte innerHashKeyed; /* keyed flag */
#ifdef HAVE_CAVIUM
word16 keyLen; /* hmac key length */
word16 dataLen;
HashType type; /* hmac key type */
int devId; /* nitrox device id */
word32 magic; /* using cavium magic */
word64 contextHandle; /* nitrox context memory handle */
byte* data; /* buffered input data for one call */
#endif
} Hmac;
#endif /* HAVE_FIPS */
/* does init */
WOLFSSL_API int wc_HmacSetKey(Hmac*, int type, const byte* key, word32 keySz);
WOLFSSL_API int wc_HmacUpdate(Hmac*, const byte*, word32);
WOLFSSL_API int wc_HmacFinal(Hmac*, byte*);
#ifdef HAVE_CAVIUM
WOLFSSL_API int wc_HmacInitCavium(Hmac*, int);
WOLFSSL_API void wc_HmacFreeCavium(Hmac*);
#endif
WOLFSSL_API int wolfSSL_GetHmacMaxSize(void);
#ifdef HAVE_HKDF
WOLFSSL_API int wc_HKDF(int type, const byte* inKey, word32 inKeySz,
const byte* salt, word32 saltSz,
const byte* info, word32 infoSz,
byte* out, word32 outSz);
#endif /* HAVE_HKDF */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* WOLF_CRYPT_HMAC_H */
#endif /* NO_HMAC */
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