/*************************************************************************
* Copyright (C) 2002 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* 	http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law  or agreed  to  in  writing,  software
* distributed under  the License  is  distributed  on  an  "AS IS"  BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the  specific  language  governing  permissions  and
* limitations under the License.
*************************************************************************/

/*
//
//  Purpose:
//     Cryptography Primitive.
//     Digesting message according to MD5
//     (derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm)
//
//     Equivalent code is available from RFC 1321.
//
//  Contents:
//        ippsHashMethod_MD5()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "hash/pcphash.h"
#include "hash/pcphash_rmf.h"
#include "pcptool.h"
#include "hash/md5/pcpmd5stuff.h"

/*F*
//    Name: ippsHashMethod_MD5
//
// Purpose: Return MD5 method.
//
// Returns:
//          Pointer to MD5 hash-method.
//
*F*/

IPPFUN(const IppsHashMethod*, ippsHashMethod_MD5, (void))
{
    /* Prevents re-initialization for better multi-threaded/repeated call performance */
    static volatile int isInitialized = 0;

    static IppsHashMethod method = { ippHashAlg_MD5,
                                     IPP_MD5_DIGEST_BITSIZE / 8,
                                     MBS_MD5,
                                     MLR_MD5,
                                     IPP_MD5_STATE_BYTESIZE,
                                     NULL,
                                     NULL,
                                     NULL,
                                     NULL };
    if (isInitialized) {
        CP_PREVENT_REORDER();
        return &method;
    }

    method.hashInit   = md5_hashInit;
    method.hashUpdate = md5_hashUpdate;
    method.hashOctStr = md5_hashOctString;
    method.msgLenRep  = md5_msgRep;

    CP_PREVENT_REORDER();
    isInitialized = 1;

    return &method;
}
