VeraCrypt
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path: root/src/Crypto/Serpent.c
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.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFile */
.highlight .c1 { color: #888888 } /* Comment.Single */
.highlight .cs { color: #cc0000; font-weight: bold; background-color: #fff0f0 } /* Comment.Special */
.highlight .gd { color: #000000; background-color: #ffdddd } /* Generic.Deleted */
.highlight .ge { font-style: italic } /* Generic.Emph */
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.highlight .kp { color: #008800 } /* Keyword.Pseudo */
.highlight .kr { color: #008800; font-weight: bold } /* Keyword.Reserved */
.highlight .kt { color: #888888; font-weight: bold } /* Keyword.Type */
.highlight .m { color: #0000DD; font-weight: bold } /* Literal.Number */
.highlight .s { color: #dd2200; background-color: #fff0f0 } /* Literal.String */
.highlight .na { color: #336699 } /* Name.Attribute */
.highlight .nb { color: #003388 } /* Name.Builtin */
.highlight .nc { color: #bb0066; font-weight: bold } /* Name.Class */
.highlight .no { color: #003366; font-weight: bold } /* Name.Constant */
.highlight .nd { color: #555555 } /* Name.Decorator */
.highlight .ne { color: #bb0066; font-weight: bold } /* Name.Exception */
.highlight .nf { color: #0066bb; font-weight: bold } /* Name.Function */
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.highlight .nn { color: #bb0066; font-weight: bold } /* Name.Namespace */
.highlight .py { color: #336699; font-weight: bold } /* Name.Property */
.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
.highlight .w { color: #bbbbbb } /* Text.Whitespace */
.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
.highlight .dl { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Delimiter */
.highlight .sd { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Doc */
.highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */
.highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */
.highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */
.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
.highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */
.highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */
.highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */
.highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */
.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2017 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#include <errno.h>
#include <string.h>
#include "Platform/SerializerFactory.h"
#include "Platform/SystemException.h"
#include "Platform/StringConverter.h"

namespace VeraCrypt
{
	SystemException::SystemException ()
		: ErrorCode (errno)
	{
	}

	SystemException::SystemException (const string &message)
		: Exception (message), ErrorCode (errno)
	{
	}

	SystemException::SystemException (const string &message, const string &subject)
		: Exception (message, StringConverter::ToWide (subject)), ErrorCode (errno)
	{
	}

	SystemException::SystemException (const string &message, const wstring &subject)
		: Exception (message, subject), ErrorCode (errno)
	{
	}

	void SystemException::Deserialize (shared_ptr <Stream> stream)
	{
		Exception::Deserialize (stream);
		Serializer sr (stream);
		sr.Deserialize ("ErrorCode", ErrorCode);
	}

	bool SystemException::IsError () const
	{
		return ErrorCode != 0;
	}

	void SystemException::Serialize (shared_ptr <Stream> stream) const
	{
		Exception::Serialize (stream);
		Serializer sr (stream);
		sr.Serialize ("ErrorCode", ErrorCode);
	}

	wstring SystemException::SystemText () const
	{
		return StringConverter::ToWide (strerror ((int) ErrorCode));
	}

#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 (SystemException);
}
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// serpent.cpp - written and placed in the public domain by Wei Dai

/* Adapted for TrueCrypt */
/* Adapted for VeraCrypt */

#ifdef TC_WINDOWS_BOOT
#pragma optimize ("t", on)
#endif

#include "Serpent.h"
#include "Common/Endian.h"

#ifdef TC_WINDOWS_BOOT
#include <stdlib.h>
#pragma intrinsic(_lrotr,_lrotl)
#define rotr32(x,n)	_lrotr(x, n)
#define rotl32(x,n)	_lrotl(x, n)
#else
#include "Crypto/misc.h"
#endif

#if !defined(_UEFI)
#include <memory.h>
#endif !defined(_UEFI)

// linear transformation
#define LT(i,a,b,c,d,e)	{\
	a = rotl32(a, 13);	\
	c = rotl32(c, 3); 	\
	d = rotl32(d ^ c ^ (a << 3), 7); 	\
	b = rotl32(b ^ a ^ c, 1); 	\
	a = rotl32(a ^ b ^ d, 5); 		\
	c = rotl32(c ^ d ^ (b << 7), 22);}

// inverse linear transformation
#define ILT(i,a,b,c,d,e)	{\
	c = rotr32(c, 22);	\
	a = rotr32(a, 5); 	\
	c ^= d ^ (b << 7);	\
	a ^= b ^ d; 		\
	b = rotr32(b, 1); 	\
	d = rotr32(d, 7) ^ c ^ (a << 3);	\
	b ^= a ^ c; 		\
	c = rotr32(c, 3); 	\
	a = rotr32(a, 13);}

// order of output from S-box functions
#define beforeS0(f) f(0,a,b,c,d,e)
#define afterS0(f) f(1,b,e,c,a,d)
#define afterS1(f) f(2,c,b,a,e,d)
#define afterS2(f) f(3,a,e,b,d,c)
#define afterS3(f) f(4,e,b,d,c,a)
#define afterS4(f) f(5,b,a,e,c,d)
#define afterS5(f) f(6,a,c,b,e,d)
#define afterS6(f) f(7,a,c,d,b,e)
#define afterS7(f) f(8,d,e,b,a,c)

// order of output from inverse S-box functions
#define beforeI7(f) f(8,a,b,c,d,e)
#define afterI7(f) f(7,d,a,b,e,c)
#define afterI6(f) f(6,a,b,c,e,d)
#define afterI5(f) f(5,b,d,e,c,a)
#define afterI4(f) f(4,b,c,e,a,d)
#define afterI3(f) f(3,a,b,e,c,d)
#define afterI2(f) f(2,b,d,e,c,a)
#define afterI1(f) f(1,a,b,c,e,d)
#define afterI0(f) f(0,a,d,b,e,c)

// The instruction sequences for the S-box functions
// come from Dag Arne Osvik's paper "Speeding up Serpent".

#define S0(i, r0, r1, r2, r3, r4) \
       {           \
    r3 ^= r0;   \
    r4 = r1;   \
    r1 &= r3;   \
    r4 ^= r2;   \
    r1 ^= r0;   \
    r0 |= r3;   \
    r0 ^= r4;   \
    r4 ^= r3;   \
    r3 ^= r2;   \
    r2 |= r1;   \
    r2 ^= r4;   \
    r4 = ~r4;      \
    r4 |= r1;   \
    r1 ^= r3;   \
    r1 ^= r4;   \
    r3 |= r0;   \
    r1 ^= r3;   \
    r4 ^= r3;   \
            }

#define I0(i, r0, r1, r2, r3, r4) \
       {           \
    r2 = ~r2;      \
    r4 = r1;   \
    r1 |= r0;   \
    r4 = ~r4;      \
    r1 ^= r2;   \
    r2 |= r4;   \
    r1 ^= r3;   \
    r0 ^= r4;   \
    r2 ^= r0;   \
    r0 &= r3;   \
    r4 ^= r0;   \
    r0 |= r1;   \
    r0 ^= r2;   \
    r3 ^= r4;   \
    r2 ^= r1;   \
    r3 ^= r0;   \
    r3 ^= r1;   \
    r2 &= r3;   \
    r4 ^= r2;   \
            }

#define S1(i, r0, r1, r2, r3, r4) \
       {           \
    r0 = ~r0;      \
    r2 = ~r2;      \
    r4 = r0;   \
    r0 &= r1;   \
    r2 ^= r0;   \
    r0 |= r3;   \
    r3 ^= r2;   \
    r1 ^= r0;   \
    r0 ^= r4;   \
    r4 |= r1;   \
    r1 ^= r3;   \
    r2 |= r0;   \
    r2 &= r4;   \
    r0 ^= r1;   \
    r1 &= r2;   \
    r1 ^= r0;   \
    r0 &= r2;   \
    r0 ^= r4;   \
            }

#define I1(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r1;   \
    r1 ^= r3;   \
    r3 &= r1;   \
    r4 ^= r2;   \
    r3 ^= r0;   \
    r0 |= r1;   \
    r2 ^= r3;   \
    r0 ^= r4;   \
    r0 |= r2;   \
    r1 ^= r3;   \
    r0 ^= r1;   \
    r1 |= r3;   \
    r1 ^= r0;   \
    r4 = ~r4;      \
    r4 ^= r1;   \
    r1 |= r0;   \
    r1 ^= r0;   \
    r1 |= r4;   \
    r3 ^= r1;   \
            }

#define S2(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r0;   \
    r0 &= r2;   \
    r0 ^= r3;   \
    r2 ^= r1;   \
    r2 ^= r0;   \
    r3 |= r4;   \
    r3 ^= r1;   \
    r4 ^= r2;   \
    r1 = r3;   \
    r3 |= r4;   \
    r3 ^= r0;   \
    r0 &= r1;   \
    r4 ^= r0;   \
    r1 ^= r3;   \
    r1 ^= r4;   \
    r4 = ~r4;      \
            }

#define I2(i, r0, r1, r2, r3, r4) \
       {           \
    r2 ^= r3;   \
    r3 ^= r0;   \
    r4 = r3;   \
    r3 &= r2;   \
    r3 ^= r1;   \
    r1 |= r2;   \
    r1 ^= r4;   \
    r4 &= r3;   \
    r2 ^= r3;   \
    r4 &= r0;   \
    r4 ^= r2;   \
    r2 &= r1;   \
    r2 |= r0;   \
    r3 = ~r3;      \
    r2 ^= r3;   \
    r0 ^= r3;   \
    r0 &= r1;   \
    r3 ^= r4;   \
    r3 ^= r0;   \
            }

#define S3(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r0;   \
    r0 |= r3;   \
    r3 ^= r1;   \
    r1 &= r4;   \
    r4 ^= r2;   \
    r2 ^= r3;   \
    r3 &= r0;   \
    r4 |= r1;   \
    r3 ^= r4;   \
    r0 ^= r1;   \
    r4 &= r0;   \
    r1 ^= r3;   \
    r4 ^= r2;   \
    r1 |= r0;   \
    r1 ^= r2;   \
    r0 ^= r3;   \
    r2 = r1;   \
    r1 |= r3;   \
    r1 ^= r0;   \
            }

#define I3(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r2;   \
    r2 ^= r1;   \
    r1 &= r2;   \
    r1 ^= r0;   \
    r0 &= r4;   \
    r4 ^= r3;   \
    r3 |= r1;   \
    r3 ^= r2;   \
    r0 ^= r4;   \
    r2 ^= r0;   \
    r0 |= r3;   \
    r0 ^= r1;   \
    r4 ^= r2;   \
    r2 &= r3;   \
    r1 |= r3;   \
    r1 ^= r2;   \
    r4 ^= r0;   \
    r2 ^= r4;   \
            }

#define S4(i, r0, r1, r2, r3, r4) \
       {           \
    r1 ^= r3;   \
    r3 = ~r3;      \
    r2 ^= r3;   \
    r3 ^= r0;   \
    r4 = r1;   \
    r1 &= r3;   \
    r1 ^= r2;   \
    r4 ^= r3;   \
    r0 ^= r4;   \
    r2 &= r4;   \
    r2 ^= r0;   \
    r0 &= r1;   \
    r3 ^= r0;   \
    r4 |= r1;   \
    r4 ^= r0;   \
    r0 |= r3;   \
    r0 ^= r2;   \
    r2 &= r3;   \
    r0 = ~r0;      \
    r4 ^= r2;   \
            }

#define I4(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r2;   \
    r2 &= r3;   \
    r2 ^= r1;   \
    r1 |= r3;   \
    r1 &= r0;   \
    r4 ^= r2;   \
    r4 ^= r1;   \
    r1 &= r2;   \
    r0 = ~r0;      \
    r3 ^= r4;   \
    r1 ^= r3;   \
    r3 &= r0;   \
    r3 ^= r2;   \
    r0 ^= r1;   \
    r2 &= r0;   \
    r3 ^= r0;   \
    r2 ^= r4;   \
    r2 |= r3;   \
    r3 ^= r0;   \
    r2 ^= r1;   \
            }

#define S5(i, r0, r1, r2, r3, r4) \
       {           \
    r0 ^= r1;   \
    r1 ^= r3;   \
    r3 = ~r3;      \
    r4 = r1;   \
    r1 &= r0;   \
    r2 ^= r3;   \
    r1 ^= r2;   \
    r2 |= r4;   \
    r4 ^= r3;   \
    r3 &= r1;   \
    r3 ^= r0;   \
    r4 ^= r1;   \
    r4 ^= r2;   \
    r2 ^= r0;   \
    r0 &= r3;   \
    r2 = ~r2;      \
    r0 ^= r4;   \
    r4 |= r3;   \
    r2 ^= r4;   \
            }

#define I5(i, r0, r1, r2, r3, r4) \
       {           \
    r1 = ~r1;      \
    r4 = r3;   \
    r2 ^= r1;   \
    r3 |= r0;   \
    r3 ^= r2;   \
    r2 |= r1;   \
    r2 &= r0;   \
    r4 ^= r3;   \
    r2 ^= r4;   \
    r4 |= r0;   \
    r4 ^= r1;   \
    r1 &= r2;   \
    r1 ^= r3;   \
    r4 ^= r2;   \
    r3 &= r4;   \
    r4 ^= r1;   \
    r3 ^= r0;   \
    r3 ^= r4;   \
    r4 = ~r4;      \
            }

#define S6(i, r0, r1, r2, r3, r4) \
       {           \
    r2 = ~r2;      \
    r4 = r3;   \
    r3 &= r0;   \
    r0 ^= r4;   \
    r3 ^= r2;   \
    r2 |= r4;   \
    r1 ^= r3;   \
    r2 ^= r0;   \
    r0 |= r1;   \
    r2 ^= r1;   \
    r4 ^= r0;   \
    r0 |= r3;   \
    r0 ^= r2;   \
    r4 ^= r3;   \
    r4 ^= r0;   \
    r3 = ~r3;      \
    r2 &= r4;   \
    r2 ^= r3;   \
            }

#define I6(i, r0, r1, r2, r3, r4) \
       {           \
    r0 ^= r2;   \
    r4 = r2;   \
    r2 &= r0;   \
    r4 ^= r3;   \
    r2 = ~r2;      \
    r3 ^= r1;   \
    r2 ^= r3;   \
    r4 |= r0;   \
    r0 ^= r2;   \
    r3 ^= r4;   \
    r4 ^= r1;   \
    r1 &= r3;   \
    r1 ^= r0;   \
    r0 ^= r3;   \
    r0 |= r2;   \
    r3 ^= r1;   \
    r4 ^= r0;   \
            }

#define S7(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r2;   \
    r2 &= r1;   \
    r2 ^= r3;   \
    r3 &= r1;   \
    r4 ^= r2;   \
    r2 ^= r1;   \
    r1 ^= r0;   \
    r0 |= r4;   \
    r0 ^= r2;   \
    r3 ^= r1;   \
    r2 ^= r3;   \
    r3 &= r0;   \
    r3 ^= r4;   \
    r4 ^= r2;   \
    r2 &= r0;   \
    r4 = ~r4;      \
    r2 ^= r4;   \
    r4 &= r0;   \
    r1 ^= r3;   \
    r4 ^= r1;   \
            }

#define I7(i, r0, r1, r2, r3, r4) \
       {           \
    r4 = r2;   \
    r2 ^= r0;   \
    r0 &= r3;   \
    r2 = ~r2;      \
    r4 |= r3;   \
    r3 ^= r1;   \
    r1 |= r0;   \
    r0 ^= r2;   \
    r2 &= r4;   \
    r1 ^= r2;   \
    r2 ^= r0;   \
    r0 |= r2;   \
    r3 &= r4;   \
    r0 ^= r3;   \
    r4 ^= r1;   \
    r3 ^= r4;   \
    r4 |= r0;   \
    r3 ^= r2;   \
    r4 ^= r2;   \
            }

// key xor
#define KX(r, a, b, c, d, e)	{\
	a ^= k[4 * r + 0]; \
	b ^= k[4 * r + 1]; \
	c ^= k[4 * r + 2]; \
	d ^= k[4 * r + 3];}


#ifdef TC_MINIMIZE_CODE_SIZE

static void S0f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r3 ^= *r0;
	*r4 = *r1;
	*r1 &= *r3;
	*r4 ^= *r2;
	*r1 ^= *r0;
	*r0 |= *r3;
	*r0 ^= *r4;
	*r4 ^= *r3;
	*r3 ^= *r2;
	*r2 |= *r1;
	*r2 ^= *r4;
	*r4 = ~*r4;
	*r4 |= *r1;
	*r1 ^= *r3;
	*r1 ^= *r4;
	*r3 |= *r0;
	*r1 ^= *r3;
	*r4 ^= *r3;
}

static void S1f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
    *r0 = ~*r0;
    *r2 = ~*r2;
    *r4 = *r0;
    *r0 &= *r1;
    *r2 ^= *r0;
    *r0 |= *r3;
    *r3 ^= *r2;
    *r1 ^= *r0;
    *r0 ^= *r4;
    *r4 |= *r1;
    *r1 ^= *r3;
    *r2 |= *r0;
    *r2 &= *r4;
    *r0 ^= *r1;
    *r1 &= *r2;
    *r1 ^= *r0;
    *r0 &= *r2;
    *r0 ^= *r4;
}

static void S2f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r4 = *r0;
	*r0 &= *r2;
	*r0 ^= *r3;
	*r2 ^= *r1;
	*r2 ^= *r0;
	*r3 |= *r4;
	*r3 ^= *r1;
	*r4 ^= *r2;
	*r1 = *r3;
	*r3 |= *r4;
	*r3 ^= *r0;
	*r0 &= *r1;
	*r4 ^= *r0;
	*r1 ^= *r3;
	*r1 ^= *r4;
	*r4 = ~*r4;
}

static void S3f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r4 = *r0;
	*r0 |= *r3;
	*r3 ^= *r1;
	*r1 &= *r4;
	*r4 ^= *r2;
	*r2 ^= *r3;
	*r3 &= *r0;
	*r4 |= *r1;
	*r3 ^= *r4;
	*r0 ^= *r1;
	*r4 &= *r0;
	*r1 ^= *r3;
	*r4 ^= *r2;
	*r1 |= *r0;
	*r1 ^= *r2;
	*r0 ^= *r3;
	*r2 = *r1;
	*r1 |= *r3;
	*r1 ^= *r0;
}

static void S4f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r1 ^= *r3;
	*r3 = ~*r3;
	*r2 ^= *r3;
	*r3 ^= *r0;
	*r4 = *r1;
	*r1 &= *r3;
	*r1 ^= *r2;
	*r4 ^= *r3;
	*r0 ^= *r4;
	*r2 &= *r4;
	*r2 ^= *r0;
	*r0 &= *r1;
	*r3 ^= *r0;
	*r4 |= *r1;
	*r4 ^= *r0;
	*r0 |= *r3;
	*r0 ^= *r2;
	*r2 &= *r3;
	*r0 = ~*r0;
	*r4 ^= *r2;
}

static void S5f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r0 ^= *r1;
	*r1 ^= *r3;
	*r3 = ~*r3;
	*r4 = *r1;
	*r1 &= *r0;
	*r2 ^= *r3;
	*r1 ^= *r2;
	*r2 |= *r4;
	*r4 ^= *r3;
	*r3 &= *r1;
	*r3 ^= *r0;
	*r4 ^= *r1;
	*r4 ^= *r2;
	*r2 ^= *r0;
	*r0 &= *r3;
	*r2 = ~*r2;
	*r0 ^= *r4;
	*r4 |= *r3;
	*r2 ^= *r4;
}

static void S6f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r2 = ~*r2;
	*r4 = *r3;
	*r3 &= *r0;
	*r0 ^= *r4;
	*r3 ^= *r2;
	*r2 |= *r4;
	*r1 ^= *r3;
	*r2 ^= *r0;
	*r0 |= *r1;
	*r2 ^= *r1;
	*r4 ^= *r0;
	*r0 |= *r3;
	*r0 ^= *r2;
	*r4 ^= *r3;
	*r4 ^= *r0;
	*r3 = ~*r3;
	*r2 &= *r4;
	*r2 ^= *r3;
}

static void S7f (unsigned __int32 *r0, unsigned __int32 *r1, unsigned __int32 *r2, unsigned __int32 *r3, unsigned __int32 *r4)
{
	*r4 = *r2;
	*r2 &= *r1;
	*r2 ^= *r3;
	*r3 &= *r1;
	*r4 ^= *r2;
	*r2 ^= *r1;
	*r1 ^= *r0;
	*r0 |= *r4;
	*r0 ^= *r2;
	*r3 ^= *r1;
	*r2 ^= *r3;
	*r3 &= *r0;
	*r3 ^= *r4;
	*r4 ^= *r2;
	*r2 &= *r0;
	*r4 = ~*r4;
	*r2 ^= *r4;
	*r4 &= *r0;
	*r1 ^= *r3;
	*r4 ^= *r1;
}

static void KXf (const unsigned __int32 *k, unsigned int r, unsigned __int32 *a, unsigned __int32 *b, unsigned __int32 *c, unsigned __int32 *d)
{
	*a ^= k[r];
	*b ^= k[r + 1];
	*c ^= k[r + 2];
	*d ^= k[r + 3];
}

#endif // TC_MINIMIZE_CODE_SIZE

#ifndef TC_MINIMIZE_CODE_SIZE

void serpent_set_key(const unsigned __int8 userKey[],unsigned __int8 *ks)
{
	unsigned __int32 a,b,c,d,e;
	unsigned __int32 *k = (unsigned __int32 *)ks;
	unsigned __int32 t;
	int i;

	for (i = 0; i < 8; i++)
		k[i] = LE32(((unsigned __int32*)userKey)[i]);

	k += 8;
	t = k[-1];
	for (i = 0; i < 132; ++i)
		k[i] = t = rotl32(k[i-8] ^ k[i-5] ^ k[i-3] ^ t ^ 0x9e3779b9 ^ i, 11);
	k -= 20;

#define LK(r, a, b, c, d, e)	{\
	a = k[(8-r)*4 + 0];		\
	b = k[(8-r)*4 + 1];		\
	c = k[(8-r)*4 + 2];		\
	d = k[(8-r)*4 + 3];}

#define SK(r, a, b, c, d, e)	{\
	k[(8-r)*4 + 4] = a;		\
	k[(8-r)*4 + 5] = b;		\
	k[(8-r)*4 + 6] = c;		\
	k[(8-r)*4 + 7] = d;}	\

	for (i=0; i<4; i++)
	{
		afterS2(LK); afterS2(S3); afterS3(SK);
		afterS1(LK); afterS1(S2); afterS2(SK);
		afterS0(LK); afterS0(S1); afterS1(SK);
		beforeS0(LK); beforeS0(S0); afterS0(SK);
		k += 8*4;
		afterS6(LK); afterS6(S7); afterS7(SK);
		afterS5(LK); afterS5(S6); afterS6(SK);
		afterS4(LK); afterS4(S5); afterS5(SK);
		afterS3(LK); afterS3(S4); afterS4(SK);
	}
	afterS2(LK); afterS2(S3); afterS3(SK);
}

#else // TC_MINIMIZE_CODE_SIZE

static void LKf (unsigned __int32 *k, unsigned int r, unsigned __int32 *a, unsigned __int32 *b, unsigned __int32 *c, unsigned __int32 *d)
{
	*a = k[r];
	*b = k[r + 1];
	*c = k[r + 2];
	*d = k[r + 3];
}

static void SKf (unsigned __int32 *k, unsigned int r, unsigned __int32 *a, unsigned __int32 *b, unsigned __int32 *c, unsigned __int32 *d)
{
	k[r + 4] = *a;
	k[r + 5] = *b;
	k[r + 6] = *c;
	k[r + 7] = *d;
}

void serpent_set_key(const unsigned __int8 userKey[], unsigned __int8 *ks)
{
	unsigned __int32 a,b,c,d,e;
	unsigned __int32 *k = (unsigned __int32 *)ks;
	unsigned __int32 t;
	int i;

	for (i = 0; i < 8; i++)
		k[i] = LE32(((unsigned __int32*)userKey)[i]);

	k += 8;
	t = k[-1];
	for (i = 0; i < 132; ++i)
		k[i] = t = rotl32(k[i-8] ^ k[i-5] ^ k[i-3] ^ t ^ 0x9e3779b9 ^ i, 11);
	k -= 20;

	for (i=0; i<4; i++)
	{
		LKf (k, 20, &a, &e, &b, &d); S3f (&a, &e, &b, &d, &c); SKf (k, 16, &e, &b, &d, &c);
		LKf (k, 24, &c, &b, &a, &e); S2f (&c, &b, &a, &e, &d); SKf (k, 20, &a, &e, &b, &d);
		LKf (k, 28, &b, &e, &c, &a); S1f (&b, &e, &c, &a, &d); SKf (k, 24, &c, &b, &a, &e);
		LKf (k, 32, &a, &b, &c, &d); S0f (&a, &b, &c, &d, &e); SKf (k, 28, &b, &e, &c, &a);
		k += 8*4;
		LKf (k,  4, &a, &c, &d, &b); S7f (&a, &c, &d, &b, &e); SKf (k,  0, &d, &e, &b, &a);
		LKf (k,  8, &a, &c, &b, &e); S6f (&a, &c, &b, &e, &d); SKf (k,  4, &a, &c, &d, &b);
		LKf (k, 12, &b, &a, &e, &c); S5f (&b, &a, &e, &c, &d); SKf (k,  8, &a, &c, &b, &e);
		LKf (k, 16, &e, &b, &d, &c); S4f (&e, &b, &d, &c, &a); SKf (k, 12, &b, &a, &e, &c);
	}
	LKf (k, 20, &a, &e, &b, &d); S3f (&a, &e, &b, &d, &c); SKf (k, 16, &e, &b, &d, &c);
}

#endif // TC_MINIMIZE_CODE_SIZE


#ifndef TC_MINIMIZE_CODE_SIZE

void serpent_encrypt(const unsigned __int8 *inBlock, unsigned __int8 *outBlock, unsigned __int8 *ks)
{
	unsigned __int32 a, b, c, d, e;
	unsigned int i=1;
	const unsigned __int32 *k = (unsigned __int32 *)ks + 8;
	unsigned __int32 *in = (unsigned __int32 *) inBlock;
	unsigned __int32 *out = (unsigned __int32 *) outBlock;

    a = LE32(in[0]);
	b = LE32(in[1]);
	c = LE32(in[2]);
	d = LE32(in[3]);

	do
	{
		beforeS0(KX); beforeS0(S0); afterS0(LT);
		afterS0(KX); afterS0(S1); afterS1(LT);
		afterS1(KX); afterS1(S2); afterS2(LT);
		afterS2(KX); afterS2(S3); afterS3(LT);
		afterS3(KX); afterS3(S4); afterS4(LT);
		afterS4(KX); afterS4(S5); afterS5(LT);
		afterS5(KX); afterS5(S6); afterS6(LT);
		afterS6(KX); afterS6(S7);

		if (i == 4)
			break;

		++i;
		c = b;
		b = e;
		e = d;
		d = a;
		a = e;
		k += 32;
		beforeS0(LT);
	}
	while (1);

	afterS7(KX);

    out[0] = LE32(d);
	out[1] = LE32(e);
	out[2] = LE32(b);
	out[3] = LE32(a);
}

#else // TC_MINIMIZE_CODE_SIZE

typedef unsigned __int32 uint32;

static void LTf (uint32 *a, uint32 *b, uint32 *c, uint32 *d)
{
	*a = rotl32(*a, 13);
	*c = rotl32(*c, 3);
	*d = rotl32(*d ^ *c ^ (*a << 3), 7);
	*b = rotl32(*b ^ *a ^ *c, 1);
	*a = rotl32(*a ^ *b ^ *d, 5);
	*c = rotl32(*c ^ *d ^ (*b << 7), 22);
}

void serpent_encrypt(const unsigned __int8 *inBlock, unsigned __int8 *outBlock, unsigned __int8 *ks)
{
	unsigned __int32 a, b, c, d, e;
	unsigned int i=1;
	const unsigned __int32 *k = (unsigned __int32 *)ks + 8;
	unsigned __int32 *in = (unsigned __int32 *) inBlock;
	unsigned __int32 *out = (unsigned __int32 *) outBlock;

    a = LE32(in[0]);
	b = LE32(in[1]);
	c = LE32(in[2]);
	d = LE32(in[3]);

	do
	{
		KXf (k,  0, &a, &b, &c, &d); S0f (&a, &b, &c, &d, &e); LTf (&b, &e, &c, &a);
		KXf (k,  4, &b, &e, &c, &a); S1f (&b, &e, &c, &a, &d); LTf (&c, &b, &a, &e);
		KXf (k,  8, &c, &b, &a, &e); S2f (&c, &b, &a, &e, &d); LTf (&a, &e, &b, &d);
		KXf (k, 12, &a, &e, &b, &d); S3f (&a, &e, &b, &d, &c); LTf (&e, &b, &d, &c);
		KXf (k, 16, &e, &b, &d, &c); S4f (&e, &b, &d, &c, &a); LTf (&b, &a, &e, &c);
		KXf (k, 20, &b, &a, &e, &c); S5f (&b, &a, &e, &c, &d); LTf (&a, &c, &b, &e);
		KXf (k, 24, &a, &c, &b, &e); S6f (&a, &c, &b, &e, &d); LTf (&a, &c, &d, &b);
		KXf (k, 28, &a, &c, &d, &b); S7f (&a, &c, &d, &b, &e);

		if (i == 4)
			break;

		++i;
		c = b;
		b = e;
		e = d;
		d = a;
		a = e;
		k += 32;
		LTf (&a,&b,&c,&d);
	}
	while (1);

	KXf (k, 32, &d, &e, &b, &a);

    out[0] = LE32(d);
	out[1] = LE32(e);
	out[2] = LE32(b);
	out[3] = LE32(a);
}

#endif // TC_MINIMIZE_CODE_SIZE

#if !defined (TC_MINIMIZE_CODE_SIZE)

void serpent_decrypt(const unsigned __int8 *inBlock, unsigned __int8 *outBlock, unsigned __int8 *ks)
{
	unsigned __int32 a, b, c, d, e;
	const unsigned __int32 *k = (unsigned __int32 *)ks + 104;
	unsigned int i=4;
	unsigned __int32 *in = (unsigned __int32 *) inBlock;
	unsigned __int32 *out = (unsigned __int32 *) outBlock;

    a = LE32(in[0]);
	b = LE32(in[1]);
	c = LE32(in[2]);
	d = LE32(in[3]);

	beforeI7(KX);
	goto start;

	do
	{
		c = b;
		b = d;
		d = e;
		k -= 32;
		beforeI7(ILT);
start:
		beforeI7(I7); afterI7(KX);
		afterI7(ILT); afterI7(I6); afterI6(KX);
		afterI6(ILT); afterI6(I5); afterI5(KX);
		afterI5(ILT); afterI5(I4); afterI4(KX);
		afterI4(ILT); afterI4(I3); afterI3(KX);
		afterI3(ILT); afterI3(I2); afterI2(KX);
		afterI2(ILT); afterI2(I1); afterI1(KX);
		afterI1(ILT); afterI1(I0); afterI0(KX);
	}
	while (--i != 0);

    out[0] = LE32(a);
	out[1] = LE32(d);
	out[2] = LE32(b);
	out[3] = LE32(e);
}

#else // TC_MINIMIZE_CODE_SIZE

static void ILTf (uint32 *a, uint32 *b, uint32 *c, uint32 *d)
{
	*c = rotr32(*c, 22);
	*a = rotr32(*a, 5);
	*c ^= *d ^ (*b << 7);
	*a ^= *b ^ *d;
	*b = rotr32(*b, 1);
	*d = rotr32(*d, 7) ^ *c ^ (*a << 3);
	*b ^= *a ^ *c;
	*c = rotr32(*c, 3);
	*a = rotr32(*a, 13);
}

void serpent_decrypt(const unsigned __int8 *inBlock, unsigned __int8 *outBlock, unsigned __int8 *ks)
{
	unsigned __int32 a, b, c, d, e;
	const unsigned __int32 *k = (unsigned __int32 *)ks + 104;
	unsigned int i=4;
	unsigned __int32 *in = (unsigned __int32 *) inBlock;
	unsigned __int32 *out = (unsigned __int32 *) outBlock;

    a = LE32(in[0]);
	b = LE32(in[1]);
	c = LE32(in[2]);
	d = LE32(in[3]);

	KXf (k, 32, &a, &b, &c, &d);
	goto start;

	do
	{
		c = b;
		b = d;
		d = e;
		k -= 32;
		beforeI7(ILT);
start:
		beforeI7(I7); KXf (k, 28, &d, &a, &b, &e);
		ILTf (&d, &a, &b, &e); afterI7(I6); KXf (k, 24, &a, &b, &c, &e);
		ILTf (&a, &b, &c, &e); afterI6(I5); KXf (k, 20, &b, &d, &e, &c);
		ILTf (&b, &d, &e, &c); afterI5(I4); KXf (k, 16, &b, &c, &e, &a);
		ILTf (&b, &c, &e, &a); afterI4(I3); KXf (k, 12, &a, &b, &e, &c);
		ILTf (&a, &b, &e, &c); afterI3(I2); KXf (k, 8,  &b, &d, &e, &c);
		ILTf (&b, &d, &e, &c); afterI2(I1); KXf (k, 4,  &a, &b, &c, &e);
		ILTf (&a, &b, &c, &e); afterI1(I0); KXf (k, 0,  &a, &d, &b, &e);
	}
	while (--i != 0);

    out[0] = LE32(a);
	out[1] = LE32(d);
	out[2] = LE32(b);
	out[3] = LE32(e);
}

#endif // TC_MINIMIZE_CODE_SIZE