XSECCryptoHash.hpp

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/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * 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.
 */

/*
 * XSEC
 *
 * XSECCryptoProvider := Base virtual class to define a hash algorithm
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: XSECCryptoHash.hpp,v 1.12 2005/06/04 11:30:26 blautenb Exp $
 *
 */

#ifndef XSECCRYPTOHASH_INCLUDE
#define XSECCRYPTOHASH_INCLUDE

#include <xsec/framework/XSECDefs.hpp>
#include <xsec/enc/XSECCryptoKey.hpp>

#define XSEC_MAX_HASH_SIZE          256     /* Max size of any expected hash algorithms (oversized) */
#define XSEC_MAX_HASH_BLOCK_SIZE    64      /* Max size of blocks used - MD5 and SHA1 are both 64 bytes*/

class DSIG_EXPORT XSECCryptoHash {


public :

    enum HashType {

        HASH_NONE           = 0,
        HASH_SHA1           = 1,
        HASH_MD5            = 2,
        HASH_SHA224         = 3,
        HASH_SHA256         = 4,
        HASH_SHA384         = 5,
        HASH_SHA512         = 6

    };

    // Constructors/Destructors
    
    XSECCryptoHash() {};
    virtual ~XSECCryptoHash() {};


    virtual void        reset(void) = 0;                    // Reset the hash

    virtual void        hash(unsigned char * data, 
                             unsigned int length) = 0;

    virtual unsigned int finish(unsigned char * hash,
                                unsigned int maxLength) = 0;// Finish and get hash



    virtual HashType getHashType(void) = 0;


    
    virtual void        setKey(XSECCryptoKey * key) = 0;


};

#endif /* XSECCRYPTOHASH_INCLUDE */

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