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This commit is contained in:
Igor Pavlov
2003-12-11 00:00:00 +00:00
committed by Kornel Lesiński
commit 8c1b5c7b7e
982 changed files with 118799 additions and 0 deletions
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118
7zip/Crypto/Zip/ZipCipher.cpp Executable file
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// Crypto/ZipCipher.h
#include "StdAfx.h"
#include "ZipCipher.h"
#include "Windows/Defs.h"
namespace NCrypto {
namespace NZip {
const int kBufferSize = 1 << 17;
CBuffer2::CBuffer2():
_buffer(0)
{
_buffer = new BYTE[kBufferSize];
}
CBuffer2::~CBuffer2()
{
delete []_buffer;
}
STDMETHODIMP CEncoder::CryptoSetPassword(const BYTE *data, UINT32 size)
{
_cipher.SetPassword(data, size);
return S_OK;
}
STDMETHODIMP CEncoder::CryptoSetCRC(UINT32 crc)
{
_crc = crc;
return S_OK;
}
STDMETHODIMP CEncoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream, const UINT64 *inSize, const UINT64 *outSize,
ICompressProgressInfo *progress)
{
CRandom random;
random.Init(::GetTickCount());
UINT64 nowPos = 0;
BYTE header[kHeaderSize];
for (int i = 0; i < kHeaderSize - 2; i++)
{
header[i] = BYTE(random.Generate());
}
header[kHeaderSize - 1] = BYTE(_crc >> 24);
header[kHeaderSize - 2] = BYTE(_crc >> 16);
UINT32 processedSize;
_cipher.EncryptHeader(header);
RINOK(outStream->Write(header, kHeaderSize, &processedSize));
if (processedSize != kHeaderSize)
return E_FAIL;
while(true)
{
if (outSize != NULL && nowPos == *outSize)
return S_OK;
RINOK(inStream->Read(_buffer, kBufferSize, &processedSize));
if (processedSize == 0)
return S_OK;
for (UINT32 i = 0; i < processedSize; i++)
_buffer[i] = _cipher.EncryptByte(_buffer[i]);
UINT32 size = processedSize;
if (outSize != NULL && nowPos + size > *outSize)
size = UINT32(*outSize - nowPos);
RINOK(outStream->Write(_buffer, size, &processedSize));
if (size != processedSize)
return E_FAIL;
nowPos += processedSize;
}
}
STDMETHODIMP CDecoder::CryptoSetPassword(const BYTE *data, UINT32 size)
{
_cipher.SetPassword(data, size);
return S_OK;
}
STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream, const UINT64 *inSize, const UINT64 *outSize,
ICompressProgressInfo *progress)
{
UINT64 nowPos = 0;
if (inSize != NULL && *inSize == 0)
return S_OK;
BYTE header[kHeaderSize];
UINT32 processedSize;
RINOK(inStream->Read(header, kHeaderSize, &processedSize));
if (processedSize != kHeaderSize)
return E_FAIL;
_cipher.DecryptHeader(header);
while(true)
{
if (outSize != NULL && nowPos == *outSize)
return S_OK;
RINOK(inStream->Read(_buffer, kBufferSize, &processedSize));
if (processedSize == 0)
return S_OK;
for (UINT32 i = 0; i < processedSize; i++)
_buffer[i] = _cipher.DecryptByte(_buffer[i]);
UINT32 size = processedSize;
if (outSize != NULL && nowPos + size > *outSize)
size = UINT32(*outSize - nowPos);
RINOK(outStream->Write(_buffer, size, &processedSize));
if (size != processedSize)
return E_FAIL;
nowPos += processedSize;
}
}
}}