src/stream/ZStream_SHA1.h

/*  @(#) $Id: ZStream_SHA1.h,v 1.7 2006/04/10 20:44:21 agreen Exp $ */

/* ------------------------------------------------------------
Copyright (c) 2002 Andrew Green and Learning in Motion, Inc.
http://www.zoolib.org

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
------------------------------------------------------------ */

#ifndef __ZStream_SHA1__
#define __ZStream_SHA1__ 1
#include "zconfig.h"
#include "ZCONFIG_SPI.h"

#ifndef ZCONFIG_StreamSHA1_UseOpenSSL
#       define ZCONFIG_StreamSHA1_UseOpenSSL ZCONFIG_SPI_Enabled(openssl)
#endif

#include "ZStream.h"

// =================================================================================================
#pragma mark -
#pragma mark * ZStream_SHA1

#if ZCONFIG_StreamSHA1_UseOpenSSL
#       include <openssl/sha.h>
#endif

namespace ZStream_SHA1 {

#if ZCONFIG_StreamSHA1_UseOpenSSL

typedef SHA_CTX Context;

#else // ZCONFIG_StreamSHA1_UseOpenSSL

struct Context
        {
        uint32 fState[5];
        size_t fSpaceUsed;
        size_t fBuffersSent;
        union
                {
                uint32 fBuffer32[16];
                uint8 fBuffer8[64];
                };
        };

#endif // ZCONFIG_StreamSHA1_UseOpenSSL

void sInit(Context& oContext);
void sUpdate(Context& ioContext, const void* iData, size_t iCount);
void sFinal(Context& ioContext, uint8 oDigest[20]);

void sTest();

} // namespace ZStream_SHA1

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamR_SHA1


class ZStreamR_SHA1 : public ZStreamR
        {
public:
        ZStreamR_SHA1(const ZStreamR& iStreamSource);
        ZStreamR_SHA1(uint8 oDigest[20], const ZStreamR& iStreamSource);
        ~ZStreamR_SHA1();

// From ZStreamR
        virtual void Imp_Read(void* iDest, size_t iCount, size_t* oCountRead);
        virtual size_t Imp_CountReadable();

// Our protocol
        void GetDigest(uint8 oDigest[20]);

protected:
        const ZStreamR& fStreamSource;
        ZStream_SHA1::Context fContext;
        uint8* fDigest;
        };

// =================================================================================================
#pragma mark -
#pragma mark * ZStreamW_SHA1


class ZStreamW_SHA1 : public ZStreamW
        {
public:
        ZStreamW_SHA1(const ZStreamW& iStreamSink);
        ZStreamW_SHA1(uint8 oDigest[20], const ZStreamW& iStreamSink);
        ~ZStreamW_SHA1();

// From ZStreamW
        virtual void Imp_Write(const void* iSource, size_t iCount, size_t* oCountWritten);
        virtual void Imp_Flush();

// Our protocol
        void GetDigest(uint8 oDigest[20]);

protected:
        const ZStreamW& fStreamSink;
        ZStream_SHA1::Context fContext;
        uint8* fDigest;
        };

// =================================================================================================

#endif // __ZStream_SHA1__

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