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77 lines
1.6 KiB
C++
Executable File
77 lines
1.6 KiB
C++
Executable File
// Crypto/Rar20Cipher.cpp
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#include "StdAfx.h"
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#include "Rar20Cipher.h"
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#include "Windows/Defs.h"
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namespace NCrypto {
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namespace NRar20 {
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static const int kBufferSize = 1 << 17;
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STDMETHODIMP CDecoder::CryptoSetPassword(const Byte *data, UInt32 size)
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{
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_coder.SetPassword(data, size);
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return S_OK;
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}
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STDMETHODIMP CDecoder::Init()
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{
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return S_OK;
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}
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STDMETHODIMP_(UInt32) CDecoder::Filter(Byte *data, UInt32 size)
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{
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const UInt16 kBlockSize = 16;
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if (size > 0 && size < kBlockSize)
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return kBlockSize;
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UInt32 i;
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for (i = 0; i + kBlockSize <= size; i += kBlockSize)
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{
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_coder.DecryptBlock(data + i);
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}
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return i;
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}
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/*
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STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
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ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
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ICompressProgressInfo *progress)
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{
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UInt64 nowPos = 0;
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UInt32 bufferPos = 0;
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UInt32 processedSize;
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for (;;)
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{
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UInt32 size = kBufferSize - bufferPos;
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RINOK(inStream->Read(_buffer + bufferPos, size, &processedSize));
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UInt32 anEndPos = bufferPos + processedSize;
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for (;bufferPos + 16 <= anEndPos; bufferPos += 16)
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_coder.DecryptBlock(_buffer + bufferPos);
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if (bufferPos == 0)
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return S_OK;
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if (outSize != NULL && nowPos + bufferPos > *outSize)
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bufferPos = UInt32(*outSize - nowPos);
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RINOK(outStream->Write(_buffer, bufferPos, &processedSize));
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if (bufferPos != processedSize)
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return E_FAIL;
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nowPos += processedSize;
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if (outSize != NULL && nowPos == *outSize)
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return S_OK;
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int i = 0;
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while(bufferPos < anEndPos)
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_buffer[i++] = _buffer[bufferPos++];
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bufferPos = i;
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}
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}
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*/
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}}
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