From a5c1978eefe2fd0dbf1ab6b7cdcb019a9b913a40 Mon Sep 17 00:00:00 2001 From: Mounir IDRASSI Date: Sun, 20 Jul 2014 12:30:58 +0200 Subject: Remove remaining legacy cryptographic algorithms that are never used by VeraCrypt. --- src/Volume/EncryptionModeCBC.cpp | 335 --------------------------------------- 1 file changed, 335 deletions(-) delete mode 100644 src/Volume/EncryptionModeCBC.cpp (limited to 'src/Volume/EncryptionModeCBC.cpp') diff --git a/src/Volume/EncryptionModeCBC.cpp b/src/Volume/EncryptionModeCBC.cpp deleted file mode 100644 index 2892986b..00000000 --- a/src/Volume/EncryptionModeCBC.cpp +++ /dev/null @@ -1,335 +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 "Platform/Memory.h" -#include "Common/Crc.h" -#include "Common/Endian.h" -#include "EncryptionModeCBC.h" - -namespace VeraCrypt -{ - void EncryptionModeCBC::Decrypt (byte *data, uint64 length) const - { - if_debug (ValidateState ()); - if_debug (ValidateParameters (data, length)); - - if (IsOuterCBC (Ciphers)) - { - DecryptBuffer (data, length, Ciphers, (uint32 *) IV.Ptr(), (uint32 *) (IV.Ptr() + WhiteningIVOffset)); - } - else - { - for (CipherList::const_reverse_iterator iCipherList = Ciphers.rbegin(); - iCipherList != Ciphers.rend(); - ++iCipherList) - { - CipherList cl; - cl.push_back (*iCipherList); - - DecryptBuffer (data, length, cl, (uint32 *) IV.Ptr(), (uint32 *) (IV.Ptr() + WhiteningIVOffset)); - } - } - } - - void EncryptionModeCBC::DecryptBuffer (byte *data, uint64 length, const CipherList &ciphers, const uint32 *iv, const uint32 *whitening) const - { - size_t blockSize = ciphers.front()->GetBlockSize(); - if (blockSize != 8 && blockSize != 16) - throw ParameterIncorrect (SRC_POS); - - uint32 *data32 = (uint32 *) data; - uint32 bufIV[4]; - uint32 ct[4]; - uint64 i; - - bufIV[0] = iv[0]; - bufIV[1] = iv[1]; - if (blockSize == 16) - { - bufIV[2] = iv[2]; - bufIV[3] = iv[3]; - } - - for (i = 0; i < length / blockSize; i++) - { - // Dewhitening - data32[0] ^= whitening[0]; - data32[1] ^= whitening[1]; - if (blockSize == 16) - { - data32[2] ^= whitening[0]; - data32[3] ^= whitening[1]; - } - - // CBC - ct[0] = data32[0]; - ct[1] = data32[1]; - if (blockSize == 16) - { - ct[2] = data32[2]; - ct[3] = data32[3]; - } - - 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 ((byte *) data32); - } - - // CBC - data32[0] ^= bufIV[0]; - data32[1] ^= bufIV[1]; - bufIV[0] = ct[0]; - bufIV[1] = ct[1]; - if (blockSize == 16) - { - data32[2] ^= bufIV[2]; - data32[3] ^= bufIV[3]; - bufIV[2] = ct[2]; - bufIV[3] = ct[3]; - } - - data32 += blockSize / sizeof(*data32); - } - - Memory::Erase (bufIV, sizeof (bufIV)); - Memory::Erase (ct, sizeof (ct)); - } - - void EncryptionModeCBC::DecryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const - { - if_debug (ValidateState ()); - if_debug (ValidateParameters (data, sectorCount, sectorSize)); - - uint32 sectorIV[4]; - uint32 sectorWhitening[2]; - - while (sectorCount--) - { - if (IsOuterCBC (Ciphers)) - { - InitSectorIVAndWhitening (sectorIndex, Ciphers.front()->GetBlockSize(), (uint64 *) IV.Ptr(), sectorIV, sectorWhitening); - DecryptBuffer (data, sectorSize, Ciphers, sectorIV, sectorWhitening); - } - else - { - for (CipherList::const_reverse_iterator iCipherList = Ciphers.rbegin(); - iCipherList != Ciphers.rend(); - ++iCipherList) - { - const Cipher &c = **iCipherList; - CipherList cl; - cl.push_back (*iCipherList); - - InitSectorIVAndWhitening (sectorIndex, c.GetBlockSize(), (uint64 *) IV.Ptr(), sectorIV, sectorWhitening); - DecryptBuffer (data, sectorSize, cl, sectorIV, sectorWhitening); - } - } - - data += sectorSize; - sectorIndex++; - } - - Memory::Erase (sectorIV, sizeof (sectorIV)); - Memory::Erase (sectorWhitening, sizeof (sectorWhitening)); - } - - void EncryptionModeCBC::Encrypt (byte *data, uint64 length) const - { - if_debug (ValidateState ()); - if_debug (ValidateParameters (data, length)); - - if (IsOuterCBC (Ciphers)) - { - EncryptBuffer (data, length, Ciphers, (uint32 *) IV.Ptr(), (uint32 *) (IV.Ptr() + WhiteningIVOffset)); - } - else - { - for (CipherList::const_iterator iCipherList = Ciphers.begin(); - iCipherList != Ciphers.end(); - ++iCipherList) - { - CipherList cl; - cl.push_back (*iCipherList); - - EncryptBuffer (data, length, cl, (uint32 *) IV.Ptr(), (uint32 *) (IV.Ptr() + WhiteningIVOffset)); - } - } - } - - void EncryptionModeCBC::EncryptBuffer (byte *data, uint64 length, const CipherList &ciphers, const uint32 *iv, const uint32 *whitening) const - { - size_t blockSize = ciphers.front()->GetBlockSize(); - if (blockSize != 8 && blockSize != 16) - throw ParameterIncorrect (SRC_POS); - - uint32 *data32 = (uint32 *) data; - uint32 bufIV[4]; - uint64 i; - - bufIV[0] = iv[0]; - bufIV[1] = iv[1]; - if (blockSize == 16) - { - bufIV[2] = iv[2]; - bufIV[3] = iv[3]; - } - - for (i = 0; i < length / blockSize; i++) - { - data32[0] ^= bufIV[0]; - data32[1] ^= bufIV[1]; - if (blockSize == 16) - { - data32[2] ^= bufIV[2]; - data32[3] ^= bufIV[3]; - } - - 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 ((byte *) data32); - } - - bufIV[0] = data32[0]; - bufIV[1] = data32[1]; - if (blockSize == 16) - { - bufIV[2] = data32[2]; - bufIV[3] = data32[3]; - } - - data32[0] ^= whitening[0]; - data32[1] ^= whitening[1]; - if (blockSize == 16) - { - data32[2] ^= whitening[0]; - data32[3] ^= whitening[1]; - } - - data32 += blockSize / sizeof(*data32); - } - - Memory::Erase (bufIV, sizeof (bufIV)); - } - - void EncryptionModeCBC::EncryptSectorsCurrentThread (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const - { - if_debug (ValidateState ()); - if_debug (ValidateParameters (data, sectorCount, sectorSize)); - - uint32 sectorIV[4]; - uint32 sectorWhitening[2]; - - while (sectorCount--) - { - if (IsOuterCBC (Ciphers)) - { - InitSectorIVAndWhitening (sectorIndex, Ciphers.front()->GetBlockSize(), (uint64 *) IV.Ptr(), sectorIV, sectorWhitening); - EncryptBuffer (data, sectorSize, Ciphers, sectorIV, sectorWhitening); - } - else - { - for (CipherList::const_iterator iCipherList = Ciphers.begin(); - iCipherList != Ciphers.end(); - ++iCipherList) - { - const Cipher &c = **iCipherList; - CipherList cl; - cl.push_back (*iCipherList); - - InitSectorIVAndWhitening (sectorIndex, c.GetBlockSize(), (uint64 *) IV.Ptr(), sectorIV, sectorWhitening); - EncryptBuffer (data, sectorSize, cl, sectorIV, sectorWhitening); - } - } - - data += sectorSize; - sectorIndex++; - } - - Memory::Erase (sectorIV, sizeof (sectorIV)); - Memory::Erase (sectorWhitening, sizeof (sectorWhitening)); - } - - void EncryptionModeCBC::InitSectorIVAndWhitening (uint64 sectorIndex, size_t blockSize, const uint64 *ivSeed, uint32 *iv, uint32 *whitening) const - { - if (blockSize != 8 && blockSize != 16) - throw ParameterIncorrect (SRC_POS); - - uint64 iv64[4]; - uint32 *iv32 = (uint32 *) iv64; - - iv64[0] = ivSeed[0] ^ Endian::Little (sectorIndex); - iv64[1] = ivSeed[1] ^ Endian::Little (sectorIndex); - iv64[2] = ivSeed[2] ^ Endian::Little (sectorIndex); - if (blockSize == 16) - { - iv64[3] = ivSeed[3] ^ Endian::Little (sectorIndex); - } - - iv[0] = iv32[0]; - iv[1] = iv32[1]; - - if (blockSize == 8) - { - whitening[0] = Endian::Little ( crc32int ( &iv32[2] ) ^ crc32int ( &iv32[5] ) ); - whitening[1] = Endian::Little ( crc32int ( &iv32[3] ) ^ crc32int ( &iv32[4] ) ); - } - else - { - iv[2] = iv32[2]; - iv[3] = iv32[3]; - - whitening[0] = Endian::Little ( crc32int ( &iv32[4] ) ^ crc32int ( &iv32[7] ) ); - whitening[1] = Endian::Little ( crc32int ( &iv32[5] ) ^ crc32int ( &iv32[6] ) ); - } - } - - bool EncryptionModeCBC::IsOuterCBC (const CipherList &ciphers) const - { - if (ciphers.size() < 2) - return false; - - size_t blockSize = ciphers.front()->GetBlockSize(); - - for (CipherList::const_iterator iCipherList = ciphers.begin(); - iCipherList != ciphers.end(); - ++iCipherList) - { - const Cipher &c = **iCipherList; - if (c.GetBlockSize() != blockSize) - return false; - } - - return true; - } - - void EncryptionModeCBC::SetKey (const ConstBufferPtr &key) - { - if (key.Size() != GetKeySize ()) - throw ParameterIncorrect (SRC_POS); - - if (!KeySet) - IV.Allocate (GetKeySize ()); - - IV.CopyFrom (key); - KeySet = true; - } -} -- cgit v1.2.3