WinCAPICryptoHashHMAC.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
 *
 * WinCAPICryptoHashHMAC := Windows CAPI Implementation of HMAC
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: WinCAPICryptoHashHMAC.hpp,v 1.8 2005/06/04 11:30:26 blautenb Exp $
 *
 */

#ifndef WINCAPICRYPTOHASHHMAC_INCLUDE
#define WINCAPICRYPTOHASHHMAC_INCLUDE

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

#if !defined(_WIN32_WINNT)
#   define _WIN32_WINNT 0x0400
#endif

#include <wincrypt.h>

class WinCAPICryptoProvider;

class DSIG_EXPORT WinCAPICryptoHashHMAC : public XSECCryptoHash {


public :


    WinCAPICryptoHashHMAC(HCRYPTPROV prov, XSECCryptoHash::HashType alg);
    virtual ~WinCAPICryptoHashHMAC();


    
    virtual void        setKey(XSECCryptoKey * key);



    virtual void        reset(void);

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

    virtual unsigned int finish(unsigned char * hash,
                                unsigned int maxLength);



    virtual HashType getHashType(void);


private:

    // Not implemented constructors
    WinCAPICryptoHashHMAC();

    unsigned char               m_mdValue[XSEC_MAX_HASH_SIZE];      // Final output
    unsigned int                m_mdLen;

    ALG_ID                      m_algId;
    XSECCryptoHash::HashType    m_hashType;

    HCRYPTPROV                  m_p;
    HCRYPTHASH                  m_h;

    unsigned char               m_ipadKeyed[XSEC_MAX_HASH_SIZE];
    unsigned char               m_opadKeyed[XSEC_MAX_HASH_SIZE];

    unsigned int                m_blockSize;        // Block size (bytes) for used alg.

    // Internal functions
    void eraseKeys();

};

#endif /* WINCAPICRYPTOHASHHMAC_INCLUDE */

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