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/* Copyright (c) 2012, Oracle and/or its affiliates.
Copyright (c) 2014, 2017, MariaDB
This program 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; version 2 of the License.
This program 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,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
/**
@file
@brief
Wrapper functions for OpenSSL, YaSSL implementations. Also provides a
Compatibility layer to make available YaSSL's SHAn implementation.
*/
#include <my_global.h>
#include <stdarg.h>
#define HASH_SIZE (NUM > 1 ? NUM/8 : 20)
#if defined(HAVE_YASSL)
#include "sha.hpp"
#define xCONTEXT(x) TaoCrypt::SHA ## x
#define yCONTEXT(y) xCONTEXT(y)
#define CONTEXT yCONTEXT(NUM)
#define SHA1 SHA
static void sha_init(CONTEXT *context)
{
context->Init();
}
/*
this is a variant of sha_init to be used in this file only.
does nothing for yassl, because the context's constructor was called automatically.
*/
static void sha_init_fast(CONTEXT *context)
{
}
static void sha_input(CONTEXT *context, const uchar *buf, unsigned len)
{
context->Update((const TaoCrypt::byte *) buf, len);
}
static void sha_result(CONTEXT *context, uchar digest[HASH_SIZE])
{
context->Final((TaoCrypt::byte *) digest);
}
#elif defined(HAVE_OPENSSL)
#include <openssl/sha.h>
#define xCONTEXT(x) SHA ## x ## _CTX
#define yCONTEXT(y) xCONTEXT(y)
#define CONTEXT yCONTEXT(NUM)
#define SHA1_CTX SHA_CTX
#define SHA224_CTX SHA256_CTX
#define SHA384_CTX SHA512_CTX
#define xSHA_Init(x) SHA ## x ## _Init
#define xSHA_Update(x) SHA ## x ## _Update
#define xSHA_Final(x) SHA ## x ## _Final
#define ySHA_Init(y) xSHA_Init(y)
#define ySHA_Update(y) xSHA_Update(y)
#define ySHA_Final(y) xSHA_Final(y)
#define SHA_Init ySHA_Init(NUM)
#define SHA_Update ySHA_Update(NUM)
#define SHA_Final ySHA_Final(NUM)
static void sha_init(CONTEXT *context)
{
SHA_Init(context);
}
static void sha_init_fast(CONTEXT *context)
{
sha_init(context);
}
static void sha_input(CONTEXT *context, const uchar *buf, unsigned len)
{
SHA_Update(context, buf, len);
}
static void sha_result(CONTEXT *context, uchar digest[HASH_SIZE])
{
SHA_Final(digest, context);
}
#endif /* HAVE_YASSL */
#define xmy_sha_multi(x) my_sha ## x ## _multi
#define xmy_sha_context_size(x) my_sha ## x ## _context_size
#define xmy_sha_init(x) my_sha ## x ## _init
#define xmy_sha_input(x) my_sha ## x ## _input
#define xmy_sha_result(x) my_sha ## x ## _result
#define xmy_sha(x) my_sha ## x
#define ymy_sha_multi(y) xmy_sha_multi(y)
#define ymy_sha_context_size(y) xmy_sha_context_size(y)
#define ymy_sha_init(y) xmy_sha_init(y)
#define ymy_sha_input(y) xmy_sha_input(y)
#define ymy_sha_result(y) xmy_sha_result(y)
#define ymy_sha(y) xmy_sha(y)
#define my_sha_multi ymy_sha_multi(NUM)
#define my_sha_context_size ymy_sha_context_size(NUM)
#define my_sha_init ymy_sha_init(NUM)
#define my_sha_input ymy_sha_input(NUM)
#define my_sha_result ymy_sha_result(NUM)
#define my_sha ymy_sha(NUM)
/**
Wrapper function to compute SHAn message digest.
@param digest [out] Computed SHAn digest
@param buf [in] Message to be computed
@param len [in] Length of the message
@return void
*/
void my_sha(uchar *digest, const char *buf, size_t len)
{
CONTEXT context;
sha_init_fast(&context);
sha_input(&context, (const uchar *)buf, len);
sha_result(&context, digest);
}
/**
Wrapper function to compute SHAn message digest for
two messages in order to emulate shaN(msg1, msg2).
@param digest [out] Computed SHAn digest
@param buf1 [in] First message
@param len1 [in] Length of first message
@param buf2 [in] Second message
@param len2 [in] Length of second message
@return void
*/
void my_sha_multi(uchar *digest, ...)
{
va_list args;
va_start(args, digest);
CONTEXT context;
const uchar *str;
sha_init_fast(&context);
for (str= va_arg(args, const uchar*); str; str= va_arg(args, const uchar*))
sha_input(&context, str, va_arg(args, size_t));
sha_result(&context, digest);
va_end(args);
}
size_t my_sha_context_size()
{
return sizeof(CONTEXT);
}
void my_sha_init(void *context)
{
sha_init((CONTEXT *)context);
}
void my_sha_input(void *context, const uchar *buf, size_t len)
{
sha_input((CONTEXT *)context, buf, len);
}
void my_sha_result(void *context, uchar *digest)
{
sha_result((CONTEXT *)context, digest);
}
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