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