MessageDigestSpi.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#ifndef _DECAF_SECURITY_MESSAGEDIGESTSPI_H_
#define _DECAF_SECURITY_MESSAGEDIGESTSPI_H_

#include <decaf/util/Config.h>

#include <decaf/nio/ByteBuffer.h>
#include <decaf/security/SecuritySpi.h>

#include <vector>

namespace decaf {
namespace security {

    class MessageDigest;

    class DECAF_API MessageDigestSpi : public SecuritySpi {
    public:

        MessageDigestSpi();

        virtual ~MessageDigestSpi();

        virtual bool isCloneable() const;

        virtual MessageDigestSpi* clone();

    protected:

        virtual int engineGetDigestLength() = 0;

        virtual void engineUpdate(unsigned char input) = 0;

        virtual void engineUpdate(const unsigned char* input, int size, int offset, int length) = 0;

        virtual void engineReset() = 0;

        virtual void engineUpdate(const std::vector<unsigned char>& input) = 0;

        virtual void engineUpdate(decaf::nio::ByteBuffer& input) = 0;

        virtual std::vector<unsigned char> engineDigest() = 0;

        virtual int engineDigest(unsigned char* buffer, int size, int offset, int length) = 0;

    private:

        friend class MessageDigest;

    };

}}

#endif /* _DECAF_SECURITY_MESSAGEDIGESTSPI_H_ */