blob: 27ccc493ab13afbc441b83bc59cb44bf7f21d180 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// Crypto/Rar20Cipher.cpp
#include "StdAfx.h"
#include "Rar20Cipher.h"
#include "Windows/Defs.h"
namespace NCrypto {
namespace NRar20 {
static const int kBufferSize = 1 << 17;
STDMETHODIMP CDecoder::CryptoSetPassword(const Byte *data, UInt32 size)
{
_coder.SetPassword(data, size);
return S_OK;
}
STDMETHODIMP CDecoder::Init()
{
return S_OK;
}
STDMETHODIMP_(UInt32) CDecoder::Filter(Byte *data, UInt32 size)
{
const UInt16 kBlockSize = 16;
if (size > 0 && size < kBlockSize)
return kBlockSize;
UInt32 i;
for (i = 0; i + kBlockSize <= size; i += kBlockSize)
{
_coder.DecryptBlock(data + i);
}
return i;
}
/*
STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
ICompressProgressInfo *progress)
{
UInt64 nowPos = 0;
UInt32 bufferPos = 0;
UInt32 processedSize;
for (;;)
{
UInt32 size = kBufferSize - bufferPos;
RINOK(inStream->Read(_buffer + bufferPos, size, &processedSize));
UInt32 anEndPos = bufferPos + processedSize;
for (;bufferPos + 16 <= anEndPos; bufferPos += 16)
_coder.DecryptBlock(_buffer + bufferPos);
if (bufferPos == 0)
return S_OK;
if (outSize != NULL && nowPos + bufferPos > *outSize)
bufferPos = UInt32(*outSize - nowPos);
RINOK(outStream->Write(_buffer, bufferPos, &processedSize));
if (bufferPos != processedSize)
return E_FAIL;
nowPos += processedSize;
if (outSize != NULL && nowPos == *outSize)
return S_OK;
int i = 0;
while(bufferPos < anEndPos)
_buffer[i++] = _buffer[bufferPos++];
bufferPos = i;
}
}
*/
}}
|
