OpenSSLCryptoHashHMAC.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
 *
 * OpenSSLCryptoHashHMAC := OpenSSL Implementation of HMAC
 *
 * Author(s): Berin Lautenbach
 *
 * $Id: OpenSSLCryptoHashHMAC.hpp,v 1.9 2005/06/04 11:30:26 blautenb Exp $
 *
 */

#ifndef OPENSSLCRYPTOHASHHMAC_INCLUDE
#define OPENSSLCRYPTOHASHHMAC_INCLUDE

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

// OpenSSL Includes
#if defined (HAVE_OPENSSL)

#include <openssl/evp.h>
#include <openssl/hmac.h>

class DSIG_EXPORT OpenSSLCryptoHashHMAC : public XSECCryptoHash {

public :


    OpenSSLCryptoHashHMAC(XSECCryptoHash::HashType alg);

    virtual ~OpenSSLCryptoHashHMAC();


    
    virtual void        setKey(XSECCryptoKey * key);

    virtual const XMLCh * getProviderName() {return DSIGConstants::s_unicodeStrPROVOpenSSL;}


    //{@

    virtual void        reset(void);

    virtual void        hash(unsigned char * data, 
                             unsigned int length);
    virtual unsigned int finish(unsigned char * hash,
                                unsigned int maxLength);// Finish and get hash



    virtual HashType getHashType(void);


private:

    // Not implemented constructors
    OpenSSLCryptoHashHMAC();

    const EVP_MD        * mp_md;                        // Digest instance
    unsigned char       m_mdValue[EVP_MAX_MD_SIZE];     // Final output
    unsigned int        m_mdLen;                        // Length of digest
    HashType            m_hashType;                     // What type of hash is this?
    HMAC_CTX            m_hctx;                         // Context for HMAC
    safeBuffer          m_keyBuf;                       // The loaded key
    unsigned int        m_keyLen;                       // The loaded key length
    bool                m_initialised;

};
#endif /* HAVE_OPENSSL */
#endif /* OPENSSLCRYPTOHASHHMAC_INCLUDE */

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