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/*
Copyright (C) 2018 MariaDB Corporation AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not see <http://www.gnu.org/licenses>
or write to the Free Software Foundation, Inc.,
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
*/
#ifndef _ma_hash_h_
#define _ma_hash_h_
#include <stddef.h>
#include <stdarg.h>
/*! Hash algorithms */
#define MA_HASH_MD5 1
#define MA_HASH_SHA1 2
#define MA_HASH_SHA224 3
#define MA_HASH_SHA256 4
#define MA_HASH_SHA384 5
#define MA_HASH_SHA512 6
#define MA_HASH_RIPEMD160 7
/*! Hash digest sizes */
#define MA_MD5_HASH_SIZE 16
#define MA_SHA1_HASH_SIZE 20
#define MA_SHA224_HASH_SIZE 28
#define MA_SHA256_HASH_SIZE 32
#define MA_SHA384_HASH_SIZE 48
#define MA_SHA512_HASH_SIZE 64
#define MA_RIPEMD160_HASH_SIZE 20
#define MA_MAX_HASH_SIZE 64
/** \typedef MRL hash context */
#if defined(_WIN32)
#include <windows.h>
#include <bcrypt.h>
typedef struct {
char free_me;
BCRYPT_ALG_HANDLE hAlg;
BCRYPT_HASH_HANDLE hHash;
PBYTE hashObject;
DWORD digest_len;
} MA_HASH_CTX;
#elif defined(HAVE_OPENSSL)
typedef void MA_HASH_CTX;
#elif defined(HAVE_GNUTLS)
typedef struct {
void *ctx;
const struct nettle_hash *hash;
} MA_HASH_CTX;
#endif
/**
@brief acquire and initialize new hash context
@param[in] algorithm hash algorithm
@param[in] ctx pointer to a crypto context
@return hash context on success, NULL on error
*/
MA_HASH_CTX *ma_hash_new(unsigned int algorithm, MA_HASH_CTX *ctx);
/**
@brief release and deinitializes a hash context
@param[in] hash context
@return void
*/
void ma_hash_free(MA_HASH_CTX *ctx);
/**
@brief hashes len bytes of data into the hash context.
This function can be called several times on same context to
hash additional data.
@param[in] ctx hash context
@param[in] buffer data buffer
@param[in] len size of buffer
@return void
*/
void ma_hash_input(MA_HASH_CTX *ctx,
const unsigned char *buffer,
size_t len);
/**
@brief retrieves the hash value from hash context
@param[in] ctx hash context
@param[out] digest digest containing hash value
@return void
*/
void ma_hash_result(MA_HASH_CTX *ctx, unsigned char *digest);
/**
@brief returns digest size for a given hash algorithm
@param[in] hash algorithm
@returns digest size or 0 on error
*/
static inline size_t ma_hash_digest_size(unsigned int hash_alg)
{
switch(hash_alg) {
case MA_HASH_MD5:
return MA_MD5_HASH_SIZE;
case MA_HASH_SHA1:
return MA_SHA1_HASH_SIZE;
case MA_HASH_SHA224:
return MA_SHA224_HASH_SIZE;
case MA_HASH_SHA256:
return MA_SHA256_HASH_SIZE;
case MA_HASH_SHA384:
return MA_SHA384_HASH_SIZE;
case MA_HASH_SHA512:
return MA_SHA512_HASH_SIZE;
case MA_HASH_RIPEMD160:
return MA_RIPEMD160_HASH_SIZE;
default:
return 0;
}
}
/**
@brief function to compute hash from buffer.
@param[in] hash_alg hash algorithm
@param[in] buffer buffer
@param[in] buffer_leng length of buffer
@param[out] digest computed hash digest
@return void
*/
static inline void ma_hash(unsigned int algorithm,
const unsigned char *buffer,
size_t buffer_length,
unsigned char *digest)
{
MA_HASH_CTX *ctx= NULL;
#ifdef _WIN32
MA_HASH_CTX dctx;
ctx= &dctx;
#endif
ctx= ma_hash_new(algorithm, ctx);
ma_hash_input(ctx, buffer, buffer_length);
ma_hash_result(ctx, digest);
ma_hash_free(ctx);
}
#endif /* _ma_hash_h_ */
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