/*
 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/Serpent.h"
#include "Crypto/Twofish.h"

#ifdef TC_AES_HW_CPU
#	include "Crypto/Aes_hw_cpu.h"
#endif

namespace VeraCrypt
{
	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 ()));

		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);
	}

	// 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, ScheduledKey);
	}


	// 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);
	}


	bool Cipher::HwSupportEnabled = true;
}
0-03-10 10:32:38 +0100'>2020-03-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=65500305404a6100b50161343637c115e5718c9e'>Windows: Fix keyfiles path passed as CLI argument and set as default not alwa...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-4</span>/<span class='insertions'>+9</span></td></tr>
<tr><td><span title='2020-03-10 10:32:31 +0100'>2020-03-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=68b9c9c72da2bb544098786c568902b902675bef'>Windows: Fix text truncation in password dialog with some languages</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2020-02-11 23:05:48 +0100'>2020-02-11</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=8fa1596e73b6b9caac77e64f83949fb413bef5dd'>Increment version to 1.24-Update5 and update signed Windows drivers.</a></td><td>Mounir IDRASSI</td><td>20</td><td><span class='deletions'>-38</span>/<span class='insertions'>+38</span></td></tr>
<tr><td><span title='2020-02-10 02:23:25 +0100'>2020-02-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=94d3a1919c8eee4d7bfd7280ee4964477dee02e3'>Windows: Implement support for processor groups in the driver and fix build i...</a></td><td>Mounir IDRASSI</td><td>4</td><td><span class='deletions'>-62</span>/<span class='insertions'>+138</span></td></tr>
<tr><td><span title='2020-02-10 02:23:18 +0100'>2020-02-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=c1d670fd752b96abac09b919d7ca1bff4ebafcbc'>Windows: Fix warnings reported by Coverity static code analyzer</a></td><td>Mounir IDRASSI</td><td>4</td><td><span class='deletions'>-17</span>/<span class='insertions'>+37</span></td></tr>
<tr><td><span title='2020-02-04 15:09:39 +0100'>2020-02-04</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=a7b61ce5e5a0d0d5ab2814d59e832c169e1b845f'>Windows: Fix groupbox alignment issue in UI of Fprmat wizard</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2020-01-29 11:10:00 +0100'>2020-01-29</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=123b187af597cbe4524bbbd4decafa3536599645'> Adding Processor Groups support for more than 64 processors (#581)</a></td><td>techvintage</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+57</span></td></tr>
<tr><td><span title='2020-01-22 18:30:30 +0100'>2020-01-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=247a16cb5ffef4dbf09615dd3d934fd7d06fdb76'>Windows: restore Visual Studio solution and project files to default configur...</a><span class='decoration'><a class='tag-deco' href='/code/VeraCrypt/tag/?h=VeraCrypt_1.24-Update4'>VeraCrypt_1.24-Update4</a></span></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-1</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2020-01-22 18:20:35 +0100'>2020-01-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=11aa708076910d5aaf187eecc4e33ea207155b12'>Windows: use fix for CVE-2019-19501 only when process elevated otherwise it w...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+22</span></td></tr>
<tr><td><span title='2020-01-22 18:20:27 +0100'>2020-01-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=3874e9af97427c42aa0a789a3e75c6f841cd14e4'>Increment version to 1.24-Update4 and update Release Notes</a></td><td>Mounir IDRASSI</td><td>16</td><td><span class='deletions'>-37</span>/<span class='insertions'>+36</span></td></tr>
<tr><td><span title='2020-01-22 18:20:18 +0100'>2020-01-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=c4893ce034372a26d8687a8d914c64368815f7a7'>Linux: correct OpenSUSE build script to indicate that we link against GTK2 an...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2020-01-22 18:20:11 +0100'>2020-01-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=be1aee00340f40f9c81676d8b65f728f4a34cd9b'>Windows: Fix regression in Expander and Format when RAM encryption is enable ...</a></td><td>Mounir IDRASSI</td><td>5</td><td><span class='deletions'>-2</span>/<span class='insertions'>+217</span></td></tr>
<tr><td><span title='2020-01-21 01:46:18 +0100'>2020-01-21</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=55831cad2267dfd50066bc7b2391b11e2d28a359'>Windows: Support notifying WAITFOR.EXE Windows command when VeraCrypt.exe exi...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+54</span></td></tr>
<tr><td><span title='2020-01-21 01:46:11 +0100'>2020-01-21</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=b6c290e4fd77c5d4ae1f5fb68e69006d49e1ad52'>Windows: Fix failure of Screen Readers (Accessibility support) to reader UI b...</a></td><td>Mounir IDRASSI</td><td>5</td><td><span class='deletions'>-3</span>/<span class='insertions'>+97</span></td></tr>
<tr><td><span title='2020-01-21 01:46:03 +0100'>2020-01-21</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=8fe3eb0136b9105ff9adabc10f04814e932fc2dc'>Windows: don't display mount/dismount examples in help dialog for command lin...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2020-01-20 01:02:54 +0100'>2020-01-20</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=b0b149db836063cc017b2530c305a7d5da92f58d'>Linux/MacOSX: Fix regression that limited the size available for hidden volumes</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2019-12-22 16:35:56 +0100'>2019-12-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=f9572ea8f5a1e4200f0ec4b8a131eed7dda6efea'>Increment version to 1.24-Update3 for Linux and update Release Notes</a><span class='decoration'><a class='tag-deco' href='/code/VeraCrypt/tag/?h=VeraCrypt_1.24-Update3'>VeraCrypt_1.24-Update3</a></span></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-4</span>/<span class='insertions'>+4</span></td></tr>
<tr><td><span title='2019-12-22 10:10:43 +0100'>2019-12-22</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=cdbe7854e86bac970824c1b8602accf27aff9c2f'>Linux: Modify .deb build scripts to link against statically built wxWidgets o...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-7</span>/<span class='insertions'>+29</span></td></tr>
<tr><td><span title='2019-12-21 02:46:50 +0100'>2019-12-21</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=f8beac6ebd00ac8b8e1286a34dfb52ef92d7e89c'>Linux: Fix building and packaging console-only version to remove dependency o...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-23</span>/<span class='insertions'>+41</span></td></tr>
<tr><td><span title='2019-12-20 13:39:43 +0100'>2019-12-20</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=de52f51f5bac0a25df78c071d9038f0232b45ca6'>Fix the compilation against WxWidgets when NOGUI=1 (#570)</a></td><td>Gokturk Yuksek</td><td>3</td><td><span class='deletions'>-1</span>/<span class='insertions'>+8</span></td></tr>
<tr><td><span title='2019-12-17 01:25:58 +0100'>2019-12-17</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=31611ad3156dbecf5986cfc6c7f4877a966b1a51'>MacOSX: revert to using wxWidgets 3.1.2 following unexplained crash when usin...</a><span class='decoration'><a class='tag-deco' href='/code/VeraCrypt/tag/?h=VeraCrypt_1.24-Update2'>VeraCrypt_1.24-Update2</a></span></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-2</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2019-12-16 15:15:55 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=27c2fc06c298237c691adc752ed6511b04a42eac'>Linux: Fix build error when linking with old wxWidgets version</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2019-12-16 00:47:13 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=7aecbb225c8a6a7ff0378668e7f67aa508513173'>Update version information in preparation for 1.24-Update2 release</a></td><td>Mounir IDRASSI</td><td>11</td><td><span class='deletions'>-16</span>/<span class='insertions'>+16</span></td></tr>
<tr><td><span title='2019-12-16 00:47:04 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=bc69fe91660b4da034230f4fa11bb70ddaaf828c'>Update Format wizard bitmap using submission by Andreas Becker (https://githu...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2019-12-16 00:46:49 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=826730650ce24f3b886d49df470257cd745e7337'>Windows: make /fastCreateFile switch apply to both UI and command line creati...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+2</span></td></tr>
<tr><td><span title='2019-12-16 00:46:41 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=1e978e69cc3fdd3482091c770014646349812023'>MacOSX: Ensure that the heading bar is always visible when window is moved so...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-5</span>/<span class='insertions'>+27</span></td></tr>
<tr><td><span title='2019-12-16 00:46:34 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=a81d45df820887cd9c66fb99d921f73632237bfc'>MacOSX: Ensure that main window is visible on screen when About is display as...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-0</span>/<span class='insertions'>+22</span></td></tr>
<tr><td><span title='2019-12-16 00:46:26 +0100'>2019-12-16</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=a4ed6be38c58a009a480a81931676273a78e36fb'>MacOSX: fix compilation error caused by missing StringConverter::ToWide metho...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2019-12-13 00:08:17 +0100'>2019-12-13</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=1fd097c666be570fedf612ed7caa7e809881e072'>Windows: check "TrueCrypt Mode" in password dialog when mounting a file conta...</a></td><td>Mounir IDRASSI</td><td>3</td><td><span class='deletions'>-1</span>/<span class='insertions'>+11</span></td></tr>
<tr><td><span title='2019-12-12 00:13:01 +0100'>2019-12-12</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=2a93826497f10540034a430add272c1d71a25eba'>Windows: Fix the checkbox for skipping verification of Rescue Disk not reflec...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-0</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2019-12-11 23:53:47 +0100'>2019-12-11</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=14bee5e6a227701e78c5fec04064c0494f6361f0'>Linux: fix compilation error when building console-only version of VeraCrypt ...</a></td><td>Mounir IDRASSI</td><td>2</td><td><span class='deletions'>-9</span>/<span class='insertions'>+0</span></td></tr>
<tr><td><span title='2019-12-10 11:10:31 +0100'>2019-12-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=8942b3eff3729d6c754c233d8b1fe272c6ea5eed'>MacOSX: link against latest wxWidgets version 3.1.3</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-3</span>/<span class='insertions'>+3</span></td></tr>
<tr><td><span title='2019-12-10 11:10:24 +0100'>2019-12-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=ed8068cbbd55025bc826c7266d9878a6671e605b'>Increment version to 1.24-Update2</a></td><td>Mounir IDRASSI</td><td>20</td><td><span class='deletions'>-38</span>/<span class='insertions'>+38</span></td></tr>
<tr><td><span title='2019-12-10 00:51:41 +0100'>2019-12-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=f9bf666018ad0327fa74251a3316a2618e2b0e67'>Windows: Align volume size field in Format wizard with other controls</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2019-12-10 00:51:34 +0100'>2019-12-10</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=f9d95ef2c84ebc61e4e0c77f8b9f054c65abd7cd'>Windows: Add switch /FastCreateFile for VeraCrypt Format.exe to speedup creat...</a></td><td>Mounir IDRASSI</td><td>3</td><td><span class='deletions'>-2</span>/<span class='insertions'>+34</span></td></tr>
<tr><td><span title='2019-12-09 18:59:27 +0100'>2019-12-09</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=5eaa204d83a1d9867094c14b4a35f310f27f6c65'>Windows Driver: Reduce memory usage of IOCTL_DISK_VERIFY handler. Now we read...</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-6</span>/<span class='insertions'>+22</span></td></tr>
<tr><td><span title='2019-12-09 18:59:20 +0100'>2019-12-09</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=31c4fbfc12e8a2293e1c40c8007a2981bbac534d'>Fix wrong check on the define CRYPTOPP_BOOL_X64</a></td><td>Mounir IDRASSI</td><td>1</td><td><span class='deletions'>-1</span>/<span class='insertions'>+1</span></td></tr>
<tr><td><span title='2019-12-09 18:59:13 +0100'>2019-12-09</span></td><td><a href='/code/VeraCrypt/commit/src?h=CI&amp;id=214efac67eaa43c7cf1392f0cdb1c1ab0c9ec2e9'>Windows: Add latest 1.24 EFI bootloader files that are signed by Microsoft th...</a></td><td>Mounir IDRASSI