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/* Copyright (c) 2012, Oracle and/or its affiliates.
Copyright (c) 2014, SkySQL Ab.
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, Suite 500, Boston, MA 02110-1335 USA */
/**
@file
@brief
Wrapper functions for OpenSSL and YaSSL. Also provides a Compatibility layer
to make available YaSSL's MD5 implementation.
*/
#include <my_global.h>
#include <my_md5.h>
#include <stdarg.h>
#if defined(HAVE_YASSL)
#include "md5.hpp"
typedef TaoCrypt::MD5 MD5_CONTEXT;
static void md5_init(MD5_CONTEXT *context)
{
context= new(context) MD5_CONTEXT;
context->Init();
}
/*
this is a variant of md5_init to be used in this file only.
does nothing for yassl, because the context's constructor was called automatically.
*/
static void md5_init_fast(MD5_CONTEXT *context)
{
}
static void md5_input(MD5_CONTEXT *context, const uchar *buf, unsigned len)
{
context->Update((const TaoCrypt::byte *) buf, len);
}
static void md5_result(MD5_CONTEXT *context, uchar digest[MD5_HASH_SIZE])
{
context->Final((TaoCrypt::byte *) digest);
}
#elif defined(HAVE_OPENSSL)
#include <openssl/evp.h>
typedef EVP_MD_CTX MD5_CONTEXT;
static void md5_init(MD5_CONTEXT *context)
{
EVP_MD_CTX_init(context);
#ifdef EVP_MD_CTX_FLAG_NON_FIPS_ALLOW
/* Ok to ignore FIPS: MD5 is not used for crypto here */
EVP_MD_CTX_set_flags(context, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
#endif
EVP_DigestInit_ex(context, EVP_md5(), NULL);
}
static void md5_init_fast(MD5_CONTEXT *context)
{
md5_init(context);
}
static void md5_input(MD5_CONTEXT *context, const uchar *buf, unsigned len)
{
EVP_DigestUpdate(context, buf, len);
}
static void md5_result(MD5_CONTEXT *context, uchar digest[MD5_HASH_SIZE])
{
EVP_DigestFinal_ex(context, digest, NULL);
EVP_MD_CTX_cleanup(context);
}
#endif /* HAVE_YASSL */
/**
Wrapper function to compute MD5 message digest.
@param digest [out] Computed MD5 digest
@param buf [in] Message to be computed
@param len [in] Length of the message
@return void
*/
void my_md5(uchar *digest, const char *buf, size_t len)
{
MD5_CONTEXT md5_context;
md5_init_fast(&md5_context);
md5_input(&md5_context, (const uchar *)buf, len);
md5_result(&md5_context, digest);
}
/**
Wrapper function to compute MD5 message digest for
two messages in order to emulate md5(msg1, msg2).
@param digest [out] Computed MD5 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_md5_multi(uchar *digest, ...)
{
va_list args;
va_start(args, digest);
MD5_CONTEXT md5_context;
const uchar *str;
md5_init_fast(&md5_context);
for (str= va_arg(args, const uchar*); str; str= va_arg(args, const uchar*))
md5_input(&md5_context, str, va_arg(args, size_t));
md5_result(&md5_context, digest);
va_end(args);
}
size_t my_md5_context_size()
{
return sizeof(MD5_CONTEXT);
}
void my_md5_init(void *context)
{
md5_init((MD5_CONTEXT *)context);
}
void my_md5_input(void *context, const uchar *buf, size_t len)
{
md5_input((MD5_CONTEXT *)context, buf, len);
}
void my_md5_result(void *context, uchar *digest)
{
md5_result((MD5_CONTEXT *)context, digest);
}
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