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Add TrueCrypt 7.1a MacOSX/Linux specific source files.
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Mounir IDRASSI
345
src/Volume/EncryptionAlgorithm.cpp
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345
src/Volume/EncryptionAlgorithm.cpp
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/*
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Copyright (c) 2008 TrueCrypt Developers Association. All rights reserved.
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Governed by the TrueCrypt License 3.0 the full text of which is contained in
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the file License.txt included in TrueCrypt binary and source code distribution
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packages.
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*/
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#include "EncryptionAlgorithm.h"
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#include "EncryptionModeCBC.h"
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#include "EncryptionModeLRW.h"
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#include "EncryptionModeXTS.h"
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namespace TrueCrypt
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{
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EncryptionAlgorithm::EncryptionAlgorithm () : Deprecated (false)
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{
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}
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EncryptionAlgorithm::~EncryptionAlgorithm ()
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{
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}
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void EncryptionAlgorithm::Decrypt (byte *data, uint64 length) const
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{
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if_debug (ValidateState ());
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Mode->Decrypt (data, length);
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}
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void EncryptionAlgorithm::Decrypt (const BufferPtr &data) const
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{
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Decrypt (data, data.Size());
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}
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void EncryptionAlgorithm::DecryptSectors (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
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{
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if_debug (ValidateState());
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Mode->DecryptSectors (data, sectorIndex, sectorCount, sectorSize);
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}
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void EncryptionAlgorithm::Encrypt (byte *data, uint64 length) const
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{
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if_debug (ValidateState());
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Mode->Encrypt (data, length);
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}
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void EncryptionAlgorithm::Encrypt (const BufferPtr &data) const
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{
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Encrypt (data, data.Size());
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}
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void EncryptionAlgorithm::EncryptSectors (byte *data, uint64 sectorIndex, uint64 sectorCount, size_t sectorSize) const
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{
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if_debug (ValidateState ());
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Mode->EncryptSectors (data, sectorIndex, sectorCount, sectorSize);
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}
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EncryptionAlgorithmList EncryptionAlgorithm::GetAvailableAlgorithms ()
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{
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EncryptionAlgorithmList l;
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l.push_back (shared_ptr <EncryptionAlgorithm> (new AES ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new Serpent ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new Twofish ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new AESTwofish ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new AESTwofishSerpent ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new SerpentAES ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new SerpentTwofishAES ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new TwofishSerpent ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new AESBlowfish ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new AESBlowfishSerpent ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new Blowfish ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new Cast5 ()));
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l.push_back (shared_ptr <EncryptionAlgorithm> (new TripleDES ()));
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return l;
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}
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size_t EncryptionAlgorithm::GetLargestKeySize (const EncryptionAlgorithmList &algorithms)
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{
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size_t largestKeySize = 0;
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foreach_ref (const EncryptionAlgorithm &ea, algorithms)
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{
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if (ea.GetKeySize() > largestKeySize)
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largestKeySize = ea.GetKeySize();
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}
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return largestKeySize;
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}
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size_t EncryptionAlgorithm::GetKeySize () const
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{
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if (Ciphers.size() < 1)
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throw NotInitialized (SRC_POS);
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size_t keySize = 0;
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foreach_ref (const Cipher &c, Ciphers)
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keySize += c.GetKeySize();
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return keySize;
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}
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size_t EncryptionAlgorithm::GetMaxBlockSize () const
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{
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size_t blockSize = 0;
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foreach_ref (const Cipher &c, Ciphers)
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if (c.GetBlockSize() > blockSize)
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blockSize = c.GetBlockSize();
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return blockSize;
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}
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size_t EncryptionAlgorithm::GetMinBlockSize () const
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{
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size_t blockSize = 0;
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foreach_ref (const Cipher &c, Ciphers)
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if (blockSize == 0 || c.GetBlockSize() < blockSize)
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blockSize = c.GetBlockSize();
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return blockSize;
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}
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shared_ptr <EncryptionMode> EncryptionAlgorithm::GetMode () const
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{
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if (Mode.get() == nullptr)
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throw NotInitialized (SRC_POS);
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return Mode;
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}
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wstring EncryptionAlgorithm::GetName () const
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{
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if (Ciphers.size() < 1)
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throw NotInitialized (SRC_POS);
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wstring name;
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foreach_reverse_ref (const Cipher &c, Ciphers)
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{
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if (name.empty())
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name = c.GetName();
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else
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name += wstring (L"-") + c.GetName();
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}
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return name;
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}
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bool EncryptionAlgorithm::IsModeSupported (const EncryptionMode &mode) const
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{
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bool supported = false;
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foreach_ref (const EncryptionMode &em, SupportedModes)
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{
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if (typeid (mode) == typeid (em))
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{
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supported = true;
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break;
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}
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}
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return supported;
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}
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bool EncryptionAlgorithm::IsModeSupported (const shared_ptr <EncryptionMode> mode) const
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{
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return IsModeSupported (*mode);
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}
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void EncryptionAlgorithm::SetMode (shared_ptr <EncryptionMode> mode)
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{
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if (!IsModeSupported (*mode))
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throw ParameterIncorrect (SRC_POS);
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mode->SetCiphers (Ciphers);
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Mode = mode;
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}
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void EncryptionAlgorithm::SetKey (const ConstBufferPtr &key)
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{
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if (Ciphers.size() < 1)
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throw NotInitialized (SRC_POS);
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if (GetKeySize() != key.Size())
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throw ParameterIncorrect (SRC_POS);
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size_t keyOffset = 0;
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foreach_ref (Cipher &c, Ciphers)
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{
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c.SetKey (key.GetRange (keyOffset, c.GetKeySize()));
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keyOffset += c.GetKeySize();
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}
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}
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void EncryptionAlgorithm::ValidateState () const
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{
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if (Ciphers.size() < 1 || Mode.get() == nullptr)
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throw NotInitialized (SRC_POS);
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}
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// AES
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AES::AES ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// AES-Blowfish
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AESBlowfish::AESBlowfish ()
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{
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Deprecated = true;
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Ciphers.push_back (shared_ptr <Cipher> (new CipherBlowfish ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// AES-Blowfish-Serpent
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AESBlowfishSerpent::AESBlowfishSerpent ()
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{
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Deprecated = true;
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherBlowfish ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// AES-Twofish
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AESTwofish::AESTwofish ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTwofish ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// AES-Twofish-Serpent
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AESTwofishSerpent::AESTwofishSerpent ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTwofish ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Blowfish
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Blowfish::Blowfish ()
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{
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Deprecated = true;
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Ciphers.push_back (shared_ptr <Cipher> (new CipherBlowfish()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// CAST5
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Cast5::Cast5 ()
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{
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Deprecated = true;
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Ciphers.push_back (shared_ptr <Cipher> (new CipherCast5()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Serpent
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Serpent::Serpent ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Serpent-AES
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SerpentAES::SerpentAES ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Triple-DES
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TripleDES::TripleDES ()
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{
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Deprecated = true;
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTripleDES()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Twofish
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Twofish::Twofish ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTwofish()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Twofish-Serpent
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TwofishSerpent::TwofishSerpent ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTwofish ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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// Serpent-Twofish-AES
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SerpentTwofishAES::SerpentTwofishAES ()
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{
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Ciphers.push_back (shared_ptr <Cipher> (new CipherAES ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherTwofish ()));
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Ciphers.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeXTS ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeLRW ()));
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SupportedModes.push_back (shared_ptr <EncryptionMode> (new EncryptionModeCBC ()));
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}
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}
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