1 files changed, 76 insertions, 0 deletions
diff --git a/CPP/7zip/Crypto/Rar20/Rar20Cipher.cpp b/CPP/7zip/Crypto/Rar20/Rar20Cipher.cpp
new file mode 100755
index 00000000..27ccc493
--- /dev/null
+++ b/CPP/7zip/Crypto/Rar20/Rar20Cipher.cpp
@@ -0,0 +1,76 @@
+// 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;
+  }
+}
+*/
+
+}}