1 files changed, 314 insertions, 0 deletions
diff --git a/src/Volume/Cipher.cpp b/src/Volume/Cipher.cpp
new file mode 100644
index 00000000..fa37e298
--- /dev/null
+++ b/src/Volume/Cipher.cpp
@@ -0,0 +1,314 @@
+/*
+ Copyright (c) 2008-2010 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/Platform.h"
+#include "Cipher.h"
+#include "Crypto/Aes.h"
+#include "Crypto/Blowfish.h"
+#include "Crypto/Des.h"
+#include "Crypto/Cast.h"
+#include "Crypto/Serpent.h"
+#include "Crypto/Twofish.h"
+
+#ifdef TC_AES_HW_CPU
+#	include "Crypto/Aes_hw_cpu.h"
+#endif
+
+namespace TrueCrypt
+{
+	Cipher::Cipher () : Initialized (false)
+	{
+	}
+
+	Cipher::~Cipher ()
+	{
+	}
+
+	void Cipher::DecryptBlock (byte *data) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+		Decrypt (data);
+	}
+
+	void Cipher::DecryptBlocks (byte *data, size_t blockCount) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+		while (blockCount-- > 0)
+		{
+			Decrypt (data);
+			data += GetBlockSize();
+		}
+	}
+
+	void Cipher::EncryptBlock (byte *data) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+		Encrypt (data);
+	}
+
+	void Cipher::EncryptBlocks (byte *data, size_t blockCount) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+		while (blockCount-- > 0)
+		{
+			Encrypt (data);
+			data += GetBlockSize();
+		}
+	}
+
+	CipherList Cipher::GetAvailableCiphers ()
+	{
+		CipherList l;
+
+		l.push_back (shared_ptr <Cipher> (new CipherAES ()));
+		l.push_back (shared_ptr <Cipher> (new CipherSerpent ()));
+		l.push_back (shared_ptr <Cipher> (new CipherTwofish ()));
+		l.push_back (shared_ptr <Cipher> (new CipherBlowfish ()));
+		l.push_back (shared_ptr <Cipher> (new CipherCast5 ()));
+		l.push_back (shared_ptr <Cipher> (new CipherTripleDES ()));
+
+		return l;
+	}
+
+	void Cipher::SetKey (const ConstBufferPtr &key)
+	{
+		if (key.Size() != GetKeySize ())
+			throw ParameterIncorrect (SRC_POS);
+
+		if (!Initialized)
+			ScheduledKey.Allocate (GetScheduledKeySize ());
+
+		SetCipherKey (key);
+		Key.CopyFrom (key);
+		Initialized = true;
+	}
+
+#define TC_EXCEPTION(TYPE) TC_SERIALIZER_FACTORY_ADD(TYPE)
+#undef TC_EXCEPTION_NODECL
+#define TC_EXCEPTION_NODECL(TYPE) TC_SERIALIZER_FACTORY_ADD(TYPE)
+
+	TC_SERIALIZER_FACTORY_ADD_EXCEPTION_SET (CipherException);
+
+
+	// AES
+	void CipherAES::Decrypt (byte *data) const
+	{
+#ifdef TC_AES_HW_CPU
+		if (IsHwSupportAvailable())
+			aes_hw_cpu_decrypt (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx), data);
+		else
+#endif
+			aes_decrypt (data, data, (aes_decrypt_ctx *) (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx)));
+	}
+
+	void CipherAES::DecryptBlocks (byte *data, size_t blockCount) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+#ifdef TC_AES_HW_CPU
+		if ((blockCount & (32 - 1)) == 0
+			&& IsHwSupportAvailable())
+		{
+			while (blockCount > 0)
+			{
+				aes_hw_cpu_decrypt_32_blocks (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx), data);
+
+				data += 32 * GetBlockSize();
+				blockCount -= 32;
+			}
+		}
+		else
+#endif
+			Cipher::DecryptBlocks (data, blockCount);
+	}
+
+	void CipherAES::Encrypt (byte *data) const
+	{
+#ifdef TC_AES_HW_CPU
+		if (IsHwSupportAvailable())
+			aes_hw_cpu_encrypt (ScheduledKey.Ptr(), data);
+		else
+#endif
+			aes_encrypt (data, data, (aes_encrypt_ctx *) ScheduledKey.Ptr());
+	}
+
+	void CipherAES::EncryptBlocks (byte *data, size_t blockCount) const
+	{
+		if (!Initialized)
+			throw NotInitialized (SRC_POS);
+
+#ifdef TC_AES_HW_CPU
+		if ((blockCount & (32 - 1)) == 0
+			&& IsHwSupportAvailable())
+		{
+			while (blockCount > 0)
+			{
+				aes_hw_cpu_encrypt_32_blocks (ScheduledKey.Ptr(), data);
+
+				data += 32 * GetBlockSize();
+				blockCount -= 32;
+			}
+		}
+		else
+#endif
+			Cipher::EncryptBlocks (data, blockCount);
+	}
+
+	size_t CipherAES::GetScheduledKeySize () const
+	{
+		return sizeof(aes_encrypt_ctx) + sizeof(aes_decrypt_ctx);
+	}
+
+	bool CipherAES::IsHwSupportAvailable () const
+	{
+#ifdef TC_AES_HW_CPU
+		static bool state = false;
+		static bool stateValid = false;
+
+		if (!stateValid)
+		{
+			state = is_aes_hw_cpu_supported() ? true : false;
+			stateValid = true;
+		}
+		return state && HwSupportEnabled;
+#else
+		return false;
+#endif
+	}
+
+	void CipherAES::SetCipherKey (const byte *key)
+	{
+		if (aes_encrypt_key256 (key, (aes_encrypt_ctx *) ScheduledKey.Ptr()) != EXIT_SUCCESS)
+			throw CipherInitError (SRC_POS);
+
+		if (aes_decrypt_key256 (key, (aes_decrypt_ctx *) (ScheduledKey.Ptr() + sizeof (aes_encrypt_ctx))) != EXIT_SUCCESS)
+			throw CipherInitError (SRC_POS);
+	}
+
+	
+	// Blowfish
+	void CipherBlowfish::Decrypt (byte *data) const
+	{
+		BlowfishEncryptLE (data, data, (BF_KEY *) ScheduledKey.Ptr(), 0);
+	}
+
+	void CipherBlowfish::Encrypt (byte *data) const
+	{
+		BlowfishEncryptLE (data, data, (BF_KEY *) ScheduledKey.Ptr(), 1);
+	}
+
+	size_t CipherBlowfish::GetScheduledKeySize () const
+	{
+		return sizeof (BF_KEY);
+	}
+
+	void CipherBlowfish::SetCipherKey (const byte *key)
+	{
+		BlowfishSetKey ((BF_KEY *) ScheduledKey.Ptr(), static_cast<int> (GetKeySize ()), (unsigned char *) key);
+	}
+
+
+	// CAST5
+	void CipherCast5::Decrypt (byte *data) const
+	{
+		Cast5Decrypt (data, data, (CAST_KEY *) ScheduledKey.Ptr());
+	}
+
+	void CipherCast5::Encrypt (byte *data) const
+	{
+		Cast5Encrypt (data, data, (CAST_KEY *) ScheduledKey.Ptr());
+	}
+
+	size_t CipherCast5::GetScheduledKeySize () const
+	{
+		return sizeof (CAST_KEY);
+	}
+
+	void CipherCast5::SetCipherKey (const byte *key)
+	{
+		Cast5SetKey ((CAST_KEY *) ScheduledKey.Ptr(), static_cast<int> (GetKeySize ()), (unsigned char *) key);
+	}
+
+
+	// Serpent
+	void CipherSerpent::Decrypt (byte *data) const
+	{
+		serpent_decrypt (data, data, ScheduledKey);
+	}
+
+	void CipherSerpent::Encrypt (byte *data) const
+	{
+		serpent_encrypt (data, data, ScheduledKey);
+	}
+	
+	size_t CipherSerpent::GetScheduledKeySize () const
+	{
+		return 140*4;
+	}
+
+	void CipherSerpent::SetCipherKey (const byte *key)
+	{
+		serpent_set_key (key, static_cast<int> (GetKeySize ()), ScheduledKey);
+	}
+
+
+	// Triple-DES
+	void CipherTripleDES::Decrypt (byte *data) const
+	{
+		TripleDesEncrypt (data, data, (TDES_KEY *) ScheduledKey.Ptr(), 0);
+	}
+
+	void CipherTripleDES::Encrypt (byte *data) const
+	{
+		TripleDesEncrypt (data, data, (TDES_KEY *) ScheduledKey.Ptr(), 1);
+	}
+
+	size_t CipherTripleDES::GetScheduledKeySize () const
+	{
+		return sizeof (TDES_KEY);
+	}
+
+	void CipherTripleDES::SetCipherKey (const byte *key)
+	{
+		TripleDesSetKey (key, GetKeySize(), (TDES_KEY *) ScheduledKey.Ptr());
+	}
+
+
+	// Twofish
+	void CipherTwofish::Decrypt (byte *data) const
+	{
+		twofish_decrypt ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *)data, (unsigned int *)data);
+	}
+
+	void CipherTwofish::Encrypt (byte *data) const
+	{
+		twofish_encrypt ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *)data, (unsigned int *)data);
+	}
+
+	size_t CipherTwofish::GetScheduledKeySize () const
+	{
+		return TWOFISH_KS;
+	}
+
+	void CipherTwofish::SetCipherKey (const byte *key)
+	{
+		twofish_set_key ((TwofishInstance *) ScheduledKey.Ptr(), (unsigned int *) key, static_cast<int> (GetKeySize ()) * 8);
+	}
+
+
+	bool Cipher::HwSupportEnabled = true;
+}