From a5c1978eefe2fd0dbf1ab6b7cdcb019a9b913a40 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Sun, 20 Jul 2014 12:30:58 +0200
Subject: Remove remaining legacy cryptographic algorithms that are never used
 by VeraCrypt.

---
 src/Volume/EncryptionModeLRW.cpp | 195 ---------------------------------------
 1 file changed, 195 deletions(-)
 delete mode 100644 src/Volume/EncryptionModeLRW.cpp

(limited to 'src/Volume/EncryptionModeLRW.cpp')

diff --git a/src/Volume/EncryptionModeLRW.cpp b/src/Volume/EncryptionModeLRW.cpp
deleted file mode 100644
index 115b0fc5..00000000
--- a/src/Volume/EncryptionModeLRW.cpp
+++ /dev/null
@@ -1,195 +0,0 @@
-/*
- Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
-
- Governed by the TrueCrypt License 3.0 the full text of which is contained in
- the file License.txt included in TrueCrypt binary and source code distribution
- packages.
-*/
-
-#include "EncryptionModeLRW.h"
-#include "Common/GfMul.h"
-
-namespace VeraCrypt
-{
-	void EncryptionModeLRW::Decrypt (byte *data, uint64 length) const
-	{
-		if_debug (ValidateState ());
-		DecryptBuffer (data, length, 1);
-	}
-
-	void EncryptionModeLRW::DecryptBuffer (byte *data, uint64 length, uint64 blockIndex) const
-	{
-		size_t blockSize = Ciphers.front()->GetBlockSize();
-		if (blockSize != 8 && blockSize != 16)
-			throw ParameterIncorrect (SRC_POS);
-
-		byte i[8];
-		*(uint64 *)i = Endian::Big (blockIndex);
-
-		byte t[Cipher::MaxBlockSize];
-
-		for (unsigned int b = 0; b < length / blockSize; b++)
-		{
-			if (blockSize == 8)
-			{
-				Gf64MulTab (i, t, (GfCtx *) (GfContext.Ptr()));
-				Xor64 ((uint64 *)data, (uint64 *)t);
-			}
-			else
-			{
-				Gf128MulBy64Tab (i, t, (GfCtx *) (GfContext.Ptr()));
-				Xor128 ((uint64 *)data, (uint64 *)t);
-			}
-
-			for (CipherList::const_reverse_iterator iCipherList = Ciphers.rbegin();
-				iCipherList != Ciphers.rend();
-				++iCipherList)
-			{
-				const Cipher &c = **iCipherList;
-
-				if (c.GetBlockSize () != blockSize)
-					throw ParameterIncorrect (SRC_POS);
-
-				c.DecryptBlock (data);
-			}
-
-			if (blockSize == 8)
-				Xor64 ((uint64 *)data, (uint64 *)t);
-			else
-				Xor128 ((uint64 *)data, (uint64 *)t);
-
-			data += blockSize;
-			IncrementBlockIndex (i);
-		}
-
-		Memory::Erase (t, sizeof (t));
-	}
-
-	void EncryptionModeLRW::DecryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
-	{
-		if_debug (ValidateState ());
-		if_debug (ValidateParameters (data, sectorCount, sectorSize));
-
-		DecryptBuffer (data,
-			sectorCount * sectorSize,
-			SectorToBlockIndex (sectorIndex));
-	}
-
-	void EncryptionModeLRW::Encrypt (byte *data, uint64 length) const
-	{
-		ValidateState ();
-		EncryptBuffer (data, length, 1);
-	}
-
-	void EncryptionModeLRW::EncryptBuffer (byte *data, uint64 length, uint64 blockIndex) const
-	{
-		size_t blockSize = Ciphers.front()->GetBlockSize();
-		if (blockSize != 8 && blockSize != 16)
-			throw ParameterIncorrect (SRC_POS);
-
-		byte i[8];
-		*(uint64 *)i = Endian::Big (blockIndex);
-
-		byte t[Cipher::MaxBlockSize];
-
-		for (unsigned int b = 0; b < length / blockSize; b++)
-		{
-			if (blockSize == 8)
-			{
-				Gf64MulTab (i, t, (GfCtx *) (GfContext.Ptr()));
-				Xor64 ((uint64 *)data, (uint64 *)t);
-			}
-			else
-			{
-				Gf128MulBy64Tab (i, t, (GfCtx *) (GfContext.Ptr()));
-				Xor128 ((uint64 *)data, (uint64 *)t);
-			}
-
-			for (CipherList::const_iterator iCipherList = Ciphers.begin();
-				iCipherList != Ciphers.end();
-				++iCipherList)
-			{
-				const Cipher &c = **iCipherList;
-
-				if (c.GetBlockSize () != blockSize)
-					throw ParameterIncorrect (SRC_POS);
-
-				c.EncryptBlock (data);
-			}
-
-			if (blockSize == 8)
-				Xor64 ((uint64 *)data, (uint64 *)t);
-			else
-				Xor128 ((uint64 *)data, (uint64 *)t);
-
-			data += blockSize;
-			IncrementBlockIndex (i);
-		}
-
-		Memory::Erase (t, sizeof (t));
-	}
-
-	void EncryptionModeLRW::EncryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
-	{
-		if_debug (ValidateState ());
-		if_debug (ValidateParameters (data, sectorCount, sectorSize));
-
-		EncryptBuffer (data,
-			sectorCount * sectorSize,
-			SectorToBlockIndex (sectorIndex));
-	}
-
-	void EncryptionModeLRW::IncrementBlockIndex (byte *index) const
-	{
-		if (index[7] != 0xff)
-			index[7]++;
-		else
-			*(uint64 *)index = Endian::Big ( Endian::Big (*(uint64 *)index) + 1 );
-	}
-
-	uint64 EncryptionModeLRW::SectorToBlockIndex (uint64 sectorIndex) const
-	{
-		sectorIndex -= SectorOffset;
-
-		switch (Ciphers.front()->GetBlockSize())
-		{
-		case 8:
-			return (sectorIndex << 6) | 1;
-
-		case 16:
-			return (sectorIndex << 5) | 1;
-		
-		default:
-			throw ParameterIncorrect (SRC_POS);
-		}
-	}
-
-	void EncryptionModeLRW::SetKey (const ConstBufferPtr &key)
-	{
-		if (key.Size() != 16)
-			throw ParameterIncorrect (SRC_POS);
-
-		if (!KeySet)
-			GfContext.Allocate (sizeof (GfCtx));
-
-		if (!Gf64TabInit ((unsigned char *) key.Get(), (GfCtx *) (GfContext.Ptr())))
-			throw bad_alloc();
-
-		if (!Gf128Tab64Init ((unsigned char *) key.Get(), (GfCtx *) (GfContext.Ptr())))
-			throw bad_alloc();
-
-		Key.CopyFrom (key);
-		KeySet = true;
-	}
-
-	void EncryptionModeLRW::Xor64 (uint64 *a, const uint64 *b) const
-	{
-		*a ^= *b;
-	}
-
-	void EncryptionModeLRW::Xor128 (uint64 *a, const uint64 *b) const
-	{
-		*a++ ^= *b++;
-		*a ^= *b;
-	}
-}
-- 
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