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OpenSSLCryptoHash.hpp

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/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 Berin Lautenbach.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by
 *                   Berin Lautenbach"
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "XSEC", "xml-security-c" and Berin Lautenbach must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact berin@users.sourceforge.net.
 *
 * 5. Products derived from this software may not be called "xml-security-c",
 *    nor may "xml-security-c" appear in their name, without prior written
 *    permission of Berin Lautenbach.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL BERIN LAUTENBACH OR OTHER
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 */

/*
 * XSEC
 *
 * OpenSSLCryptoHash := OpenSSL Implementation of SHA1
 *
 */

#ifndef OPENSSLCRYPTOHASHSHA1_INCLUDE
#define OPENSSLCRYPTOHASHSHA1_INCLUDE

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

// OpenSSL Includes

#include <openssl/evp.h>

class DSIG_EXPORT OpenSSLCryptoHash : public XSECCryptoHash {


public :

    // Constructors/Destructors
    
    OpenSSLCryptoHash(XSECCryptoHash::HashType alg);
    virtual ~OpenSSLCryptoHash();

    // Key activities
    virtual void        setKey(XSECCryptoKey * key) {}

    // Hashing Activities
    virtual void        reset(void);                    // Reset the hash
    virtual void        hash(unsigned char * data, 
                             unsigned int length);      // Hash some data
    virtual unsigned int finish(unsigned char * hash,
                                unsigned int maxLength);// Finish and get hash

    // Get information
    virtual HashType getHashType(void);

private:

    // Not implemented constructors
    OpenSSLCryptoHash();

    EVP_MD_CTX          m_mdctx;                        // Context for digest
    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?

};

#endif /* OPENSSLCRYPTOHASHSHA1_INCLUDE */

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