(**************************************************)
(*                                                *)
(*     Advanced Encryption Standard (AES)         *)
(*                                                *)
(*     Copyright (c) 1998-2001                    *)
(*     EldoS, Alexander Ionov                     *)
(*                                                *)
(**************************************************)

unit ElAES;

interface

uses
  Classes, SysUtils;

type
  EAESError = class(Exception);

  PInteger  = ^Integer;

  TAESBuffer = array [0..15] of byte;
  TAESKey128 = array [0..15] of byte;
  TAESKey192 = array [0..23] of byte;
  TAESKey256 = array [0..31] of byte;
  TAESExpandedKey128 = array [0..43] of longword;
  TAESExpandedKey192 = array [0..53] of longword;
  TAESExpandedKey256 = array [0..63] of longword;

  PAESBuffer =^TAESBuffer;
  PAESKey128 =^TAESKey128;
  PAESKey192 =^TAESKey192;
  PAESKey256 =^TAESKey256;
  PAESExpandedKey128 =^TAESExpandedKey128;
  PAESExpandedKey192 =^TAESExpandedKey192;
  PAESExpandedKey256 =^TAESExpandedKey256;

// Key expansion routines for encryption  

procedure ExpandAESKeyForEncryption(const Key: TAESKey128;
  var ExpandedKey: TAESExpandedKey128); overload;
procedure ExpandAESKeyForEncryption(const Key: TAESKey192;
  var ExpandedKey: TAESExpandedKey192); overload;
procedure ExpandAESKeyForEncryption(const Key: TAESKey256;
  var ExpandedKey: TAESExpandedKey256); overload;

// Block encryption routines

procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey128;
  var OutBuf: TAESBuffer); overload;
procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey192;
  var OutBuf: TAESBuffer); overload;
procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey256;
  var OutBuf: TAESBuffer); overload;

// Stream encryption routines (ECB mode)

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey128; Dest: TStream); overload;
procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128; Dest: TStream); overload;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey192; Dest: TStream); overload;
procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192; Dest: TStream); overload;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey256; Dest: TStream); overload;
procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256; Dest: TStream); overload;

// Stream encryption routines (CBC mode)

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey128; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey192; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey256; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

// Key transformation routines for decryption

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey128); overload;
procedure ExpandAESKeyForDecryption(const Key: TAESKey128;
  var ExpandedKey: TAESExpandedKey128); overload;

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey192); overload;
procedure ExpandAESKeyForDecryption(const Key: TAESKey192;
  var ExpandedKey: TAESExpandedKey192); overload;

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey256); overload;
procedure ExpandAESKeyForDecryption(const Key: TAESKey256;
  var ExpandedKey: TAESExpandedKey256); overload;

// Block decryption routines

procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey128;
  var OutBuf: TAESBuffer); overload;
procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey192;
  var OutBuf: TAESBuffer); overload;
procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey256;
  var OutBuf: TAESBuffer); overload;

// Stream decryption routines (ECB mode)

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey128; Dest: TStream); overload;
procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128; Dest: TStream); overload;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey192; Dest: TStream); overload;
procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192; Dest: TStream); overload;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey256; Dest: TStream); overload;
procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256; Dest: TStream); overload;

// Stream decryption routines (CBC mode)

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey128; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey192; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey256; const InitVector: TAESBuffer; Dest: TStream); overload;
procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256;  const InitVector: TAESBuffer;
  Dest: TStream); overload;

resourcestring
  SInvalidInBufSize = 'Invalid buffer size for decryption';
  SReadError = 'Stream read error';
  SWriteError = 'Stream write error';

implementation

type
  PLongWord = ^LongWord;

function Min(A, B: integer): integer;
begin
  if A < B then
    Result := A
  else
    Result := B;
end;

const
  Rcon: array [1..30] of longword = (
    $00000001, $00000002, $00000004, $00000008, $00000010, $00000020,
    $00000040, $00000080, $0000001B, $00000036, $0000006C, $000000D8,
    $000000AB, $0000004D, $0000009A, $0000002F, $0000005E, $000000BC,
    $00000063, $000000C6, $00000097, $00000035, $0000006A, $000000D4,
    $000000B3, $0000007D, $000000FA, $000000EF, $000000C5, $00000091
  );

  ForwardTable: array [0..255] of longword = (
    $A56363C6, $847C7CF8, $997777EE, $8D7B7BF6, $0DF2F2FF, $BD6B6BD6, $B16F6FDE, $54C5C591,
    $50303060, $03010102, $A96767CE, $7D2B2B56, $19FEFEE7, $62D7D7B5, $E6ABAB4D, $9A7676EC,
    $45CACA8F, $9D82821F, $40C9C989, $877D7DFA, $15FAFAEF, $EB5959B2, $C947478E, $0BF0F0FB,
    $ECADAD41, $67D4D4B3, $FDA2A25F, $EAAFAF45, $BF9C9C23, $F7A4A453, $967272E4, $5BC0C09B,
    $C2B7B775, $1CFDFDE1, $AE93933D, $6A26264C, $5A36366C, $413F3F7E, $02F7F7F5, $4FCCCC83,
    $5C343468, $F4A5A551, $34E5E5D1, $08F1F1F9, $937171E2, $73D8D8AB, $53313162, $3F15152A,
    $0C040408, $52C7C795, $65232346, $5EC3C39D, $28181830, $A1969637, $0F05050A, $B59A9A2F,
    $0907070E, $36121224, $9B80801B, $3DE2E2DF, $26EBEBCD, $6927274E, $CDB2B27F, $9F7575EA,
    $1B090912, $9E83831D, $742C2C58, $2E1A1A34, $2D1B1B36, $B26E6EDC, $EE5A5AB4, $FBA0A05B,
    $F65252A4, $4D3B3B76, $61D6D6B7, $CEB3B37D, $7B292952, $3EE3E3DD, $712F2F5E, $97848413,
    $F55353A6, $68D1D1B9, $00000000, $2CEDEDC1, $60202040, $1FFCFCE3, $C8B1B179, $ED5B5BB6,
    $BE6A6AD4, $46CBCB8D, $D9BEBE67, $4B393972, $DE4A4A94, $D44C4C98, $E85858B0, $4ACFCF85,
    $6BD0D0BB, $2AEFEFC5, $E5AAAA4F, $16FBFBED, $C5434386, $D74D4D9A, $55333366, $94858511,
    $CF45458A, $10F9F9E9, $06020204, $817F7FFE, $F05050A0, $443C3C78, $BA9F9F25, $E3A8A84B,
    $F35151A2, $FEA3A35D, $C0404080, $8A8F8F05, $AD92923F, $BC9D9D21, $48383870, $04F5F5F1,
    $DFBCBC63, $C1B6B677, $75DADAAF, $63212142, $30101020, $1AFFFFE5, $0EF3F3FD, $6DD2D2BF,
    $4CCDCD81, $140C0C18, $35131326, $2FECECC3, $E15F5FBE, $A2979735, $CC444488, $3917172E,
    $57C4C493, $F2A7A755, $827E7EFC, $473D3D7A, $AC6464C8, $E75D5DBA, $2B191932, $957373E6,
    $A06060C0, $98818119, $D14F4F9E, $7FDCDCA3, $66222244, $7E2A2A54, $AB90903B, $8388880B,
    $CA46468C, $29EEEEC7, $D3B8B86B, $3C141428, $79DEDEA7, $E25E5EBC, $1D0B0B16, $76DBDBAD,
    $3BE0E0DB, $56323264, $4E3A3A74, $1E0A0A14, $DB494992, $0A06060C, $6C242448, $E45C5CB8,
    $5DC2C29F, $6ED3D3BD, $EFACAC43, $A66262C4, $A8919139, $A4959531, $37E4E4D3, $8B7979F2,
    $32E7E7D5, $43C8C88B, $5937376E, $B76D6DDA, $8C8D8D01, $64D5D5B1, $D24E4E9C, $E0A9A949,
    $B46C6CD8, $FA5656AC, $07F4F4F3, $25EAEACF, $AF6565CA, $8E7A7AF4, $E9AEAE47, $18080810,
    $D5BABA6F, $887878F0, $6F25254A, $722E2E5C, $241C1C38, $F1A6A657, $C7B4B473, $51C6C697,
    $23E8E8CB, $7CDDDDA1, $9C7474E8, $211F1F3E, $DD4B4B96, $DCBDBD61, $868B8B0D, $858A8A0F,
    $907070E0, $423E3E7C, $C4B5B571, $AA6666CC, $D8484890, $05030306, $01F6F6F7, $120E0E1C,
    $A36161C2, $5F35356A, $F95757AE, $D0B9B969, $91868617, $58C1C199, $271D1D3A, $B99E9E27,
    $38E1E1D9, $13F8F8EB, $B398982B, $33111122, $BB6969D2, $70D9D9A9, $898E8E07, $A7949433,
    $B69B9B2D, $221E1E3C, $92878715, $20E9E9C9, $49CECE87, $FF5555AA, $78282850, $7ADFDFA5,
    $8F8C8C03, $F8A1A159, $80898909, $170D0D1A, $DABFBF65, $31E6E6D7, $C6424284, $B86868D0,
    $C3414182, $B0999929, $772D2D5A, $110F0F1E, $CBB0B07B, $FC5454A8, $D6BBBB6D, $3A16162C
  );

  LastForwardTable: array [0..255] of longword = (
    $00000063, $0000007C, $00000077, $0000007B, $000000F2, $0000006B, $0000006F, $000000C5,
    $00000030, $00000001, $00000067, $0000002B, $000000FE, $000000D7, $000000AB, $00000076,
    $000000CA, $00000082, $000000C9, $0000007D, $000000FA, $00000059, $00000047, $000000F0,
    $000000AD, $000000D4, $000000A2, $000000AF, $0000009C, $000000A4, $00000072, $000000C0,
    $000000B7, $000000FD, $00000093, $00000026, $00000036, $0000003F, $000000F7, $000000CC,
    $00000034, $000000A5, $000000E5, $000000F1, $00000071, $000000D8, $00000031, $00000015,
    $00000004, $000000C7, $00000023, $000000C3, $00000018, $00000096, $00000005, $0000009A,
    $00000007, $00000012, $00000080, $000000E2, $000000EB, $00000027, $000000B2, $00000075,
    $00000009, $00000083, $0000002C, $0000001A, $0000001B, $0000006E, $0000005A, $000000A0,
    $00000052, $0000003B, $000000D6, $000000B3, $00000029, $000000E3, $0000002F, $00000084,
    $00000053, $000000D1, $00000000, $000000ED, $00000020, $000000FC, $000000B1, $0000005B,
    $0000006A, $000000CB, $000000BE, $00000039, $0000004A, $0000004C, $00000058, $000000CF,
    $000000D0, $000000EF, $000000AA, $000000FB, $00000043, $0000004D, $00000033, $00000085,
    $00000045, $000000F9, $00000002, $0000007F, $00000050, $0000003C, $0000009F, $000000A8,
    $00000051, $000000A3, $00000040, $0000008F, $00000092, $0000009D, $00000038, $000000F5,
    $000000BC, $000000B6, $000000DA, $00000021, $00000010, $000000FF, $000000F3, $000000D2,
    $000000CD, $0000000C, $00000013, $000000EC, $0000005F, $00000097, $00000044, $00000017,
    $000000C4, $000000A7, $0000007E, $0000003D, $00000064, $0000005D, $00000019, $00000073,
    $00000060, $00000081, $0000004F, $000000DC, $00000022, $0000002A, $00000090, $00000088,
    $00000046, $000000EE, $000000B8, $00000014, $000000DE, $0000005E, $0000000B, $000000DB,
    $000000E0, $00000032, $0000003A, $0000000A, $00000049, $00000006, $00000024, $0000005C,
    $000000C2, $000000D3, $000000AC, $00000062, $00000091, $00000095, $000000E4, $00000079,
    $000000E7, $000000C8, $00000037, $0000006D, $0000008D, $000000D5, $0000004E, $000000A9,
    $0000006C, $00000056, $000000F4, $000000EA, $00000065, $0000007A, $000000AE, $00000008,
    $000000BA, $00000078, $00000025, $0000002E, $0000001C, $000000A6, $000000B4, $000000C6,
    $000000E8, $000000DD, $00000074, $0000001F, $0000004B, $000000BD, $0000008B, $0000008A,
    $00000070, $0000003E, $000000B5, $00000066, $00000048, $00000003, $000000F6, $0000000E,
    $00000061, $00000035, $00000057, $000000B9, $00000086, $000000C1, $0000001D, $0000009E,
    $000000E1, $000000F8, $00000098, $00000011, $00000069, $000000D9, $0000008E, $00000094,
    $0000009B, $0000001E, $00000087, $000000E9, $000000CE, $00000055, $00000028, $000000DF,
    $0000008C, $000000A1, $00000089, $0000000D, $000000BF, $000000E6, $00000042, $00000068,
    $00000041, $00000099, $0000002D, $0000000F, $000000B0, $00000054, $000000BB, $00000016
  );

  InverseTable: array [0..255] of longword = (
    $50A7F451, $5365417E, $C3A4171A, $965E273A, $CB6BAB3B, $F1459D1F, $AB58FAAC, $9303E34B,
    $55FA3020, $F66D76AD, $9176CC88, $254C02F5, $FCD7E54F, $D7CB2AC5, $80443526, $8FA362B5,
    $495AB1DE, $671BBA25, $980EEA45, $E1C0FE5D, $02752FC3, $12F04C81, $A397468D, $C6F9D36B,
    $E75F8F03, $959C9215, $EB7A6DBF, $DA595295, $2D83BED4, $D3217458, $2969E049, $44C8C98E,
    $6A89C275, $78798EF4, $6B3E5899, $DD71B927, $B64FE1BE, $17AD88F0, $66AC20C9, $B43ACE7D,
    $184ADF63, $82311AE5, $60335197, $457F5362, $E07764B1, $84AE6BBB, $1CA081FE, $942B08F9,
    $58684870, $19FD458F, $876CDE94, $B7F87B52, $23D373AB, $E2024B72, $578F1FE3, $2AAB5566,
    $0728EBB2, $03C2B52F, $9A7BC586, $A50837D3, $F2872830, $B2A5BF23, $BA6A0302, $5C8216ED,
    $2B1CCF8A, $92B479A7, $F0F207F3, $A1E2694E, $CDF4DA65, $D5BE0506, $1F6234D1, $8AFEA6C4,
    $9D532E34, $A055F3A2, $32E18A05, $75EBF6A4, $39EC830B, $AAEF6040, $069F715E, $51106EBD,
    $F98A213E, $3D06DD96, $AE053EDD, $46BDE64D, $B58D5491, $055DC471, $6FD40604, $FF155060,
    $24FB9819, $97E9BDD6, $CC434089, $779ED967, $BD42E8B0, $888B8907, $385B19E7, $DBEEC879,
    $470A7CA1, $E90F427C, $C91E84F8, $00000000, $83868009, $48ED2B32, $AC70111E, $4E725A6C,
    $FBFF0EFD, $5638850F, $1ED5AE3D, $27392D36, $64D90F0A, $21A65C68, $D1545B9B, $3A2E3624,
    $B1670A0C, $0FE75793, $D296EEB4, $9E919B1B, $4FC5C080, $A220DC61, $694B775A, $161A121C,
    $0ABA93E2, $E52AA0C0, $43E0223C, $1D171B12, $0B0D090E, $ADC78BF2, $B9A8B62D, $C8A91E14,
    $8519F157, $4C0775AF, $BBDD99EE, $FD607FA3, $9F2601F7, $BCF5725C, $C53B6644, $347EFB5B,
    $7629438B, $DCC623CB, $68FCEDB6, $63F1E4B8, $CADC31D7, $10856342, $40229713, $2011C684,
    $7D244A85, $F83DBBD2, $1132F9AE, $6DA129C7, $4B2F9E1D, $F330B2DC, $EC52860D, $D0E3C177,
    $6C16B32B, $99B970A9, $FA489411, $2264E947, $C48CFCA8, $1A3FF0A0, $D82C7D56, $EF903322,
    $C74E4987, $C1D138D9, $FEA2CA8C, $360BD498, $CF81F5A6, $28DE7AA5, $268EB7DA, $A4BFAD3F,
    $E49D3A2C, $0D927850, $9BCC5F6A, $62467E54, $C2138DF6, $E8B8D890, $5EF7392E, $F5AFC382,
    $BE805D9F, $7C93D069, $A92DD56F, $B31225CF, $3B99ACC8, $A77D1810, $6E639CE8, $7BBB3BDB,
    $097826CD, $F418596E, $01B79AEC, $A89A4F83, $656E95E6, $7EE6FFAA, $08CFBC21, $E6E815EF,
    $D99BE7BA, $CE366F4A, $D4099FEA, $D67CB029, $AFB2A431, $31233F2A, $3094A5C6, $C066A235,
    $37BC4E74, $A6CA82FC, $B0D090E0, $15D8A733, $4A9804F1, $F7DAEC41, $0E50CD7F, $2FF69117,
    $8DD64D76, $4DB0EF43, $544DAACC, $DF0496E4, $E3B5D19E, $1B886A4C, $B81F2CC1, $7F516546,
    $04EA5E9D, $5D358C01, $737487FA, $2E410BFB, $5A1D67B3, $52D2DB92, $335610E9, $1347D66D,
    $8C61D79A, $7A0CA137, $8E14F859, $893C13EB, $EE27A9CE, $35C961B7, $EDE51CE1, $3CB1477A,
    $59DFD29C, $3F73F255, $79CE1418, $BF37C773, $EACDF753, $5BAAFD5F, $146F3DDF, $86DB4478,
    $81F3AFCA, $3EC468B9, $2C342438, $5F40A3C2, $72C31D16, $0C25E2BC, $8B493C28, $41950DFF,
    $7101A839, $DEB30C08, $9CE4B4D8, $90C15664, $6184CB7B, $70B632D5, $745C6C48, $4257B8D0
  );

  LastInverseTable: array [0..255] of longword = (
    $00000052, $00000009, $0000006A, $000000D5, $00000030, $00000036, $000000A5, $00000038,
    $000000BF, $00000040, $000000A3, $0000009E, $00000081, $000000F3, $000000D7, $000000FB,
    $0000007C, $000000E3, $00000039, $00000082, $0000009B, $0000002F, $000000FF, $00000087,
    $00000034, $0000008E, $00000043, $00000044, $000000C4, $000000DE, $000000E9, $000000CB,
    $00000054, $0000007B, $00000094, $00000032, $000000A6, $000000C2, $00000023, $0000003D,
    $000000EE, $0000004C, $00000095, $0000000B, $00000042, $000000FA, $000000C3, $0000004E,
    $00000008, $0000002E, $000000A1, $00000066, $00000028, $000000D9, $00000024, $000000B2,
    $00000076, $0000005B, $000000A2, $00000049, $0000006D, $0000008B, $000000D1, $00000025,
    $00000072, $000000F8, $000000F6, $00000064, $00000086, $00000068, $00000098, $00000016,
    $000000D4, $000000A4, $0000005C, $000000CC, $0000005D, $00000065, $000000B6, $00000092,
    $0000006C, $00000070, $00000048, $00000050, $000000FD, $000000ED, $000000B9, $000000DA,
    $0000005E, $00000015, $00000046, $00000057, $000000A7, $0000008D, $0000009D, $00000084,
    $00000090, $000000D8, $000000AB, $00000000, $0000008C, $000000BC, $000000D3, $0000000A,
    $000000F7, $000000E4, $00000058, $00000005, $000000B8, $000000B3, $00000045, $00000006,
    $000000D0, $0000002C, $0000001E, $0000008F, $000000CA, $0000003F, $0000000F, $00000002,
    $000000C1, $000000AF, $000000BD, $00000003, $00000001, $00000013, $0000008A, $0000006B,
    $0000003A, $00000091, $00000011, $00000041, $0000004F, $00000067, $000000DC, $000000EA,
    $00000097, $000000F2, $000000CF, $000000CE, $000000F0, $000000B4, $000000E6, $00000073,
    $00000096, $000000AC, $00000074, $00000022, $000000E7, $000000AD, $00000035, $00000085,
    $000000E2, $000000F9, $00000037, $000000E8, $0000001C, $00000075, $000000DF, $0000006E,
    $00000047, $000000F1, $0000001A, $00000071, $0000001D, $00000029, $000000C5, $00000089,
    $0000006F, $000000B7, $00000062, $0000000E, $000000AA, $00000018, $000000BE, $0000001B,
    $000000FC, $00000056, $0000003E, $0000004B, $000000C6, $000000D2, $00000079, $00000020,
    $0000009A, $000000DB, $000000C0, $000000FE, $00000078, $000000CD, $0000005A, $000000F4,
    $0000001F, $000000DD, $000000A8, $00000033, $00000088, $00000007, $000000C7, $00000031,
    $000000B1, $00000012, $00000010, $00000059, $00000027, $00000080, $000000EC, $0000005F,
    $00000060, $00000051, $0000007F, $000000A9, $00000019, $000000B5, $0000004A, $0000000D,
    $0000002D, $000000E5, $0000007A, $0000009F, $00000093, $000000C9, $0000009C, $000000EF,
    $000000A0, $000000E0, $0000003B, $0000004D, $000000AE, $0000002A, $000000F5, $000000B0,
    $000000C8, $000000EB, $000000BB, $0000003C, $00000083, $00000053, $00000099, $00000061,
    $00000017, $0000002B, $00000004, $0000007E, $000000BA, $00000077, $000000D6, $00000026,
    $000000E1, $00000069, $00000014, $00000063, $00000055, $00000021, $0000000C, $0000007D
  );

procedure ExpandAESKeyForEncryption(const Key: TAESKey128; var ExpandedKey: TAESExpandedKey128);
var
  I, J: integer;
  T: longword;
  W0, W1, W2, W3: longword;
begin
  ExpandedKey[0] := PLongWord(@Key[0])^;
  ExpandedKey[1] := PLongWord(@Key[4])^;
  ExpandedKey[2] := PLongWord(@Key[8])^;
  ExpandedKey[3] := PLongWord(@Key[12])^;
  I := 0; J := 1;
  repeat
    T := (ExpandedKey[I + 3] shl 24) or (ExpandedKey[I + 3] shr 8);
    W0 := LastForwardTable[Byte(T)]; W1 := LastForwardTable[Byte(T shr 8)];
    W2 := LastForwardTable[Byte(T shr 16)]; W3 := LastForwardTable[Byte(T shr 24)];
    ExpandedKey[I + 4] := ExpandedKey[I] xor
      (W0 xor ((W1 shl 8) or (W1 shr 24)) xor
      ((W2 shl 16) or (W2 shr 16)) xor ((W3 shl 24) or (W3 shr 8))) xor Rcon[J];
    Inc(J);
    ExpandedKey[I + 5] := ExpandedKey[I + 1] xor ExpandedKey[I + 4];
    ExpandedKey[I + 6] := ExpandedKey[I + 2] xor ExpandedKey[I + 5];
    ExpandedKey[I + 7] := ExpandedKey[I + 3] xor ExpandedKey[I + 6];
    Inc(I, 4);
  until I >= 40;
end;

procedure ExpandAESKeyForEncryption(const Key: TAESKey192; var ExpandedKey: TAESExpandedKey192); overload;
var
  I, J: integer;
  T: longword;
  W0, W1, W2, W3: longword;
begin
  ExpandedKey[0] := PLongWord(@Key[0])^;
  ExpandedKey[1] := PLongWord(@Key[4])^;
  ExpandedKey[2] := PLongWord(@Key[8])^;
  ExpandedKey[3] := PLongWord(@Key[12])^;
  ExpandedKey[4] := PLongWord(@Key[16])^;
  ExpandedKey[5] := PLongWord(@Key[20])^;
  I := 0; J := 1;
  repeat
    T := (ExpandedKey[I + 5] shl 24) or (ExpandedKey[I + 5] shr 8);
    W0 := LastForwardTable[Byte(T)]; W1 := LastForwardTable[Byte(T shr 8)];
    W2 := LastForwardTable[Byte(T shr 16)]; W3 := LastForwardTable[Byte(T shr 24)];
    ExpandedKey[I + 6] := ExpandedKey[I] xor
      (W0 xor ((W1 shl 8) or (W1 shr 24)) xor
      ((W2 shl 16) or (W2 shr 16)) xor ((W3 shl 24) or (W3 shr 8))) xor Rcon[J];
    Inc(J);
    ExpandedKey[I + 7] := ExpandedKey[I + 1] xor ExpandedKey[I + 6];
    ExpandedKey[I + 8] := ExpandedKey[I + 2] xor ExpandedKey[I + 7];
    ExpandedKey[I + 9] := ExpandedKey[I + 3] xor ExpandedKey[I + 8];
    ExpandedKey[I + 10] := ExpandedKey[I + 4] xor ExpandedKey[I + 9];
    ExpandedKey[I + 11] := ExpandedKey[I + 5] xor ExpandedKey[I + 10];
    Inc(I, 6);
  until I >= 46;
end;

procedure ExpandAESKeyForEncryption(const Key: TAESKey256; var ExpandedKey: TAESExpandedKey256); overload;
var
  I, J: integer;
  T: longword;
  W0, W1, W2, W3: longword;
begin
  ExpandedKey[0] := PLongWord(@Key[0])^;
  ExpandedKey[1] := PLongWord(@Key[4])^;
  ExpandedKey[2] := PLongWord(@Key[8])^;
  ExpandedKey[3] := PLongWord(@Key[12])^;
  ExpandedKey[4] := PLongWord(@Key[16])^;
  ExpandedKey[5] := PLongWord(@Key[20])^;
  ExpandedKey[6] := PLongWord(@Key[24])^;
  ExpandedKey[7] := PLongWord(@Key[28])^;
  I := 0; J := 1;
  repeat
    T := (ExpandedKey[I + 7] shl 24) or (ExpandedKey[I + 7] shr 8);
    W0 := LastForwardTable[Byte(T)]; W1 := LastForwardTable[Byte(T shr 8)];
    W2 := LastForwardTable[Byte(T shr 16)]; W3 := LastForwardTable[Byte(T shr 24)];
    ExpandedKey[I + 8] := ExpandedKey[I] xor
      (W0 xor ((W1 shl 8) or (W1 shr 24)) xor
      ((W2 shl 16) or (W2 shr 16)) xor ((W3 shl 24) or (W3 shr 8))) xor Rcon[J];
    Inc(J);
    ExpandedKey[I + 9] := ExpandedKey[I + 1] xor ExpandedKey[I + 8];
    ExpandedKey[I + 10] := ExpandedKey[I + 2] xor ExpandedKey[I + 9];
    ExpandedKey[I + 11] := ExpandedKey[I + 3] xor ExpandedKey[I + 10];
    W0 := LastForwardTable[Byte(ExpandedKey[I + 11])];
    W1 := LastForwardTable[Byte(ExpandedKey[I + 11] shr 8)];
    W2 := LastForwardTable[Byte(ExpandedKey[I + 11] shr 16)];
    W3 := LastForwardTable[Byte(ExpandedKey[I + 11] shr 24)];
    ExpandedKey[I + 12] := ExpandedKey[I + 4] xor
      (W0 xor ((W1 shl 8) or (W1 shr 24)) xor
      ((W2 shl 16) or (W2 shr 16)) xor ((W3 shl 24) or (W3 shr 8)));
    ExpandedKey[I + 13] := ExpandedKey[I + 5] xor ExpandedKey[I + 12];
    ExpandedKey[I + 14] := ExpandedKey[I + 6] xor ExpandedKey[I + 13];
    ExpandedKey[I + 15] := ExpandedKey[I + 7] xor ExpandedKey[I + 14];
    Inc(I, 8);
  until I >= 52;
end;

procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey128;
  var OutBuf: TAESBuffer); 
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[0];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[1];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[2];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[3];
  // performing transformation 9 times
  // round 1
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // round 2
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 3
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 4
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 5
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 6
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 7
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 8
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 9
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // last round of transformations
  W0 := LastForwardTable[Byte(T1[0])]; W1 := LastForwardTable[Byte(T1[1] shr 8)];
  W2 := LastForwardTable[Byte(T1[2] shr 16)]; W3 := LastForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[40];
  W0 := LastForwardTable[Byte(T1[1])]; W1 := LastForwardTable[Byte(T1[2] shr 8)];
  W2 := LastForwardTable[Byte(T1[3] shr 16)]; W3 := LastForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[41];
  W0 := LastForwardTable[Byte(T1[2])]; W1 := LastForwardTable[Byte(T1[3] shr 8)];
  W2 := LastForwardTable[Byte(T1[0] shr 16)]; W3 := LastForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[42];
  W0 := LastForwardTable[Byte(T1[3])]; W1 := LastForwardTable[Byte(T1[0] shr 8)];
  W2 := LastForwardTable[Byte(T1[1] shr 16)]; W3 := LastForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[43];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey192;
  var OutBuf: TAESBuffer);
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[0];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[1];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[2];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[3];
  // performing transformation 11 times
  // round 1
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // round 2
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 3
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 4
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 5
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 6
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 7
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 8
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 9
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // round 10
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[40];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[41];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[42];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[43];
  // round 11
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[44];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[45];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[46];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[47];
  // last round of transformations
  W0 := LastForwardTable[Byte(T1[0])]; W1 := LastForwardTable[Byte(T1[1] shr 8)];
  W2 := LastForwardTable[Byte(T1[2] shr 16)]; W3 := LastForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[48];
  W0 := LastForwardTable[Byte(T1[1])]; W1 := LastForwardTable[Byte(T1[2] shr 8)];
  W2 := LastForwardTable[Byte(T1[3] shr 16)]; W3 := LastForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[49];
  W0 := LastForwardTable[Byte(T1[2])]; W1 := LastForwardTable[Byte(T1[3] shr 8)];
  W2 := LastForwardTable[Byte(T1[0] shr 16)]; W3 := LastForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[50];
  W0 := LastForwardTable[Byte(T1[3])]; W1 := LastForwardTable[Byte(T1[0] shr 8)];
  W2 := LastForwardTable[Byte(T1[1] shr 16)]; W3 := LastForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[51];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

procedure EncryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey256;
  var OutBuf: TAESBuffer);
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[0];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[1];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[2];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[3];
  // performing transformation 13 times
  // round 1
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // round 2
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 3
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 4
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 5
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 6
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 7
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 8
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 9
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // round 10
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[40];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[41];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[42];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[43];
  // round 11
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[44];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[45];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[46];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[47];
  // round 12
  W0 := ForwardTable[Byte(T1[0])]; W1 := ForwardTable[Byte(T1[1] shr 8)];
  W2 := ForwardTable[Byte(T1[2] shr 16)]; W3 := ForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[48];
  W0 := ForwardTable[Byte(T1[1])]; W1 := ForwardTable[Byte(T1[2] shr 8)];
  W2 := ForwardTable[Byte(T1[3] shr 16)]; W3 := ForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[49];
  W0 := ForwardTable[Byte(T1[2])]; W1 := ForwardTable[Byte(T1[3] shr 8)];
  W2 := ForwardTable[Byte(T1[0] shr 16)]; W3 := ForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[50];
  W0 := ForwardTable[Byte(T1[3])]; W1 := ForwardTable[Byte(T1[0] shr 8)];
  W2 := ForwardTable[Byte(T1[1] shr 16)]; W3 := ForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[51];
  // round 13
  W0 := ForwardTable[Byte(T0[0])]; W1 := ForwardTable[Byte(T0[1] shr 8)];
  W2 := ForwardTable[Byte(T0[2] shr 16)]; W3 := ForwardTable[Byte(T0[3] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[52];
  W0 := ForwardTable[Byte(T0[1])]; W1 := ForwardTable[Byte(T0[2] shr 8)];
  W2 := ForwardTable[Byte(T0[3] shr 16)]; W3 := ForwardTable[Byte(T0[0] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[53];
  W0 := ForwardTable[Byte(T0[2])]; W1 := ForwardTable[Byte(T0[3] shr 8)];
  W2 := ForwardTable[Byte(T0[0] shr 16)]; W3 := ForwardTable[Byte(T0[1] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[54];
  W0 := ForwardTable[Byte(T0[3])]; W1 := ForwardTable[Byte(T0[0] shr 8)];
  W2 := ForwardTable[Byte(T0[1] shr 16)]; W3 := ForwardTable[Byte(T0[2] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[55];
  // last round of transformations
  W0 := LastForwardTable[Byte(T1[0])]; W1 := LastForwardTable[Byte(T1[1] shr 8)];
  W2 := LastForwardTable[Byte(T1[2] shr 16)]; W3 := LastForwardTable[Byte(T1[3] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[56];
  W0 := LastForwardTable[Byte(T1[1])]; W1 := LastForwardTable[Byte(T1[2] shr 8)];
  W2 := LastForwardTable[Byte(T1[3] shr 16)]; W3 := LastForwardTable[Byte(T1[0] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[57];
  W0 := LastForwardTable[Byte(T1[2])]; W1 := LastForwardTable[Byte(T1[3] shr 8)];
  W2 := LastForwardTable[Byte(T1[0] shr 16)]; W3 := LastForwardTable[Byte(T1[1] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[58];
  W0 := LastForwardTable[Byte(T1[3])]; W1 := LastForwardTable[Byte(T1[0] shr 8)];
  W2 := LastForwardTable[Byte(T1[1] shr 16)]; W3 := LastForwardTable[Byte(T1[2] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[59];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey128);
var
  I: integer;
  U, F2, F4, F8, F9: longword;
begin
  for I := 1 to 9 do
  begin
    F9 := ExpandedKey[I * 4];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 1];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 1] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 2];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 2] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 3];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 3] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
  end;
end;

procedure ExpandAESKeyForDecryption(const Key: TAESKey128; var ExpandedKey: TAESExpandedKey128);
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  ExpandAESKeyForDecryption(ExpandedKey);
end;

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey192);
var
  I: integer;
  U, F2, F4, F8, F9: longword;
begin
  for I := 1 to 11 do
  begin
    F9 := ExpandedKey[I * 4];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 1];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 1] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 2];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 2] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 3];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 3] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
  end;
end;

procedure ExpandAESKeyForDecryption(const Key: TAESKey192; var ExpandedKey: TAESExpandedKey192);
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  ExpandAESKeyForDecryption(ExpandedKey);
end;

procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey256);
var
  I: integer;
  U, F2, F4, F8, F9: longword;
begin
  for I := 1 to 13 do
  begin
    F9 := ExpandedKey[I * 4];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 1];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 1] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 2];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 2] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
    F9 := ExpandedKey[I * 4 + 3];
    U := F9 and $80808080;
    F2 := ((F9 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F2 and $80808080;
    F4 := ((F2 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    U := F4 and $80808080;
    F8 := ((F4 and $7F7F7F7F) shl 1) xor ((U - (U shr 7)) and $1B1B1B1B);
    F9 := F9 xor F8;
    ExpandedKey[I * 4 + 3] := F2 xor F4 xor F8 xor
      (((F2 xor F9) shl 24) or ((F2 xor F9) shr 8)) xor
      (((F4 xor F9) shl 16) or ((F4 xor F9) shr 16)) xor ((F9 shl 8) or (F9 shr 24));
  end;
end;

procedure ExpandAESKeyForDecryption(const Key: TAESKey256; var ExpandedKey: TAESExpandedKey256);
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  ExpandAESKeyForDecryption(ExpandedKey);
end;

procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey128;
  var OutBuf: TAESBuffer);
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[40];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[41];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[42];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[43];
  // performing transformations 9 times
  // round 1
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // round 2
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 3
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 4
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 5
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 6
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 7
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 8
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 9
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // last round of transformations
  W0 := LastInverseTable[Byte(T1[0])]; W1 := LastInverseTable[Byte(T1[3] shr 8)];
  W2 := LastInverseTable[Byte(T1[2] shr 16)]; W3 := LastInverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[0];
  W0 := LastInverseTable[Byte(T1[1])]; W1 := LastInverseTable[Byte(T1[0] shr 8)];
  W2 := LastInverseTable[Byte(T1[3] shr 16)]; W3 := LastInverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[1];
  W0 := LastInverseTable[Byte(T1[2])]; W1 := LastInverseTable[Byte(T1[1] shr 8)];
  W2 := LastInverseTable[Byte(T1[0] shr 16)]; W3 := LastInverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[2];
  W0 := LastInverseTable[Byte(T1[3])]; W1 := LastInverseTable[Byte(T1[2] shr 8)];
  W2 := LastInverseTable[Byte(T1[1] shr 16)]; W3 := LastInverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[3];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey192;
  var OutBuf: TAESBuffer);
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[48];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[49];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[50];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[51];
  // performing transformations 11 times
  // round 1
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[44];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[45];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[46];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[47];
  // round 2
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[40];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[41];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[42];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[43];
  // round 3
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // round 4
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 5
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 6
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 7
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 8
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 9
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 10
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 11
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // last round of transformations
  W0 := LastInverseTable[Byte(T1[0])]; W1 := LastInverseTable[Byte(T1[3] shr 8)];
  W2 := LastInverseTable[Byte(T1[2] shr 16)]; W3 := LastInverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[0];
  W0 := LastInverseTable[Byte(T1[1])]; W1 := LastInverseTable[Byte(T1[0] shr 8)];
  W2 := LastInverseTable[Byte(T1[3] shr 16)]; W3 := LastInverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[1];
  W0 := LastInverseTable[Byte(T1[2])]; W1 := LastInverseTable[Byte(T1[1] shr 8)];
  W2 := LastInverseTable[Byte(T1[0] shr 16)]; W3 := LastInverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[2];
  W0 := LastInverseTable[Byte(T1[3])]; W1 := LastInverseTable[Byte(T1[2] shr 8)];
  W2 := LastInverseTable[Byte(T1[1] shr 16)]; W3 := LastInverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[3];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

procedure DecryptAES(const InBuf: TAESBuffer; const Key: TAESExpandedKey256;
  var OutBuf: TAESBuffer);
var
  T0, T1: array [0..3] of longword;
  W0, W1, W2, W3: longword;
begin
  // initializing
  T0[0] := PLongWord(@InBuf[0])^ xor Key[56];
  T0[1] := PLongWord(@InBuf[4])^ xor Key[57];
  T0[2] := PLongWord(@InBuf[8])^ xor Key[58];
  T0[3] := PLongWord(@InBuf[12])^ xor Key[59];
  // performing transformations 13 times
  // round 1
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[52];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[53];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[54];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[55];
  // round 2
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[48];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[49];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[50];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[51];
  // round 3
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[44];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[45];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[46];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[47];
  // round 4
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[40];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[41];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[42];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[43];
  // round 5
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[36];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[37];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[38];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[39];
  // round 6
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[32];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[33];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[34];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[35];
  // round 7
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[28];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[29];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[30];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[31];
  // round 8
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[24];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[25];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[26];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[27];
  // round 9
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[20];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[21];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[22];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[23];
  // round 10
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[16];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[17];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[18];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[19];
  // round 11
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[12];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[13];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[14];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[15];
  // round 12
  W0 := InverseTable[Byte(T1[0])]; W1 := InverseTable[Byte(T1[3] shr 8)];
  W2 := InverseTable[Byte(T1[2] shr 16)]; W3 := InverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[8];
  W0 := InverseTable[Byte(T1[1])]; W1 := InverseTable[Byte(T1[0] shr 8)];
  W2 := InverseTable[Byte(T1[3] shr 16)]; W3 := InverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[9];
  W0 := InverseTable[Byte(T1[2])]; W1 := InverseTable[Byte(T1[1] shr 8)];
  W2 := InverseTable[Byte(T1[0] shr 16)]; W3 := InverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[10];
  W0 := InverseTable[Byte(T1[3])]; W1 := InverseTable[Byte(T1[2] shr 8)];
  W2 := InverseTable[Byte(T1[1] shr 16)]; W3 := InverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[11];
  // round 13
  W0 := InverseTable[Byte(T0[0])]; W1 := InverseTable[Byte(T0[3] shr 8)];
  W2 := InverseTable[Byte(T0[2] shr 16)]; W3 := InverseTable[Byte(T0[1] shr 24)];
  T1[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[4];
  W0 := InverseTable[Byte(T0[1])]; W1 := InverseTable[Byte(T0[0] shr 8)];
  W2 := InverseTable[Byte(T0[3] shr 16)]; W3 := InverseTable[Byte(T0[2] shr 24)];
  T1[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[5];
  W0 := InverseTable[Byte(T0[2])]; W1 := InverseTable[Byte(T0[1] shr 8)];
  W2 := InverseTable[Byte(T0[0] shr 16)]; W3 := InverseTable[Byte(T0[3] shr 24)];
  T1[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[6];
  W0 := InverseTable[Byte(T0[3])]; W1 := InverseTable[Byte(T0[2] shr 8)];
  W2 := InverseTable[Byte(T0[1] shr 16)]; W3 := InverseTable[Byte(T0[0] shr 24)];
  T1[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[7];
  // last round of transformations
  W0 := LastInverseTable[Byte(T1[0])]; W1 := LastInverseTable[Byte(T1[3] shr 8)];
  W2 := LastInverseTable[Byte(T1[2] shr 16)]; W3 := LastInverseTable[Byte(T1[1] shr 24)];
  T0[0] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[0];
  W0 := LastInverseTable[Byte(T1[1])]; W1 := LastInverseTable[Byte(T1[0] shr 8)];
  W2 := LastInverseTable[Byte(T1[3] shr 16)]; W3 := LastInverseTable[Byte(T1[2] shr 24)];
  T0[1] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[1];
  W0 := LastInverseTable[Byte(T1[2])]; W1 := LastInverseTable[Byte(T1[1] shr 8)];
  W2 := LastInverseTable[Byte(T1[0] shr 16)]; W3 := LastInverseTable[Byte(T1[3] shr 24)];
  T0[2] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[2];
  W0 := LastInverseTable[Byte(T1[3])]; W1 := LastInverseTable[Byte(T1[2] shr 8)];
  W2 := LastInverseTable[Byte(T1[1] shr 16)]; W3 := LastInverseTable[Byte(T1[0] shr 24)];
  T0[3] := (W0 xor ((W1 shl 8) or (W1 shr 24)) xor ((W2 shl 16) or (W2 shr 16))
    xor ((W3 shl 24) or (W3 shr 8))) xor Key[3];
  // finalizing
  PLongWord(@OutBuf[0])^ := T0[0]; PLongWord(@OutBuf[4])^ := T0[1];
  PLongWord(@OutBuf[8])^ := T0[2]; PLongWord(@OutBuf[12])^ := T0[3];
end;

// Stream encryption routines (ECB mode)

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey128; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey128;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey192; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey192;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey256; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey256;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

procedure EncryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

// Stream decryption routines (ECB mode)

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey128; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey128;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    DecryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey192; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey192;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    DecryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const Key: TAESKey256; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey256;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamECB(Source, Count, ExpandedKey, Dest);
end;

procedure DecryptAESStreamECB(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256; Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    DecryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

// Stream encryption routines (CBC mode)

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey128; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey128;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut, Vector: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  Vector := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Vector := TempOut;
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey192; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey192;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut, Vector: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  Vector := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Vector := TempOut;
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey256; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey256;
begin
  ExpandAESKeyForEncryption(Key, ExpandedKey);
  EncryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure EncryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut, Vector: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  Vector := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError.Create(SReadError);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
    Vector := TempOut;
    Dec(Count, SizeOf(TAESBuffer));
  end;
  if Count > 0 then
  begin
    Done := Source.Read(TempIn, Count);
    if Done < Count then
      raise EStreamError.Create(SReadError);
    FillChar(TempIn[Count], SizeOf(TempIn) - Count, 0);
    PLongWord(@TempIn[0])^ := PLongWord(@TempIn[0])^ xor PLongWord(@Vector[0])^;
    PLongWord(@TempIn[4])^ := PLongWord(@TempIn[4])^ xor PLongWord(@Vector[4])^;
    PLongWord(@TempIn[8])^ := PLongWord(@TempIn[8])^ xor PLongWord(@Vector[8])^;
    PLongWord(@TempIn[12])^ := PLongWord(@TempIn[12])^ xor PLongWord(@Vector[12])^;
    EncryptAES(TempIn, ExpandedKey, TempOut);
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError.Create(SWriteError);
  end;
end;

// Stream decryption routines (CBC mode)

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey128; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey128;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey128;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Vector1, Vector2: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  Vector1 := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError(SReadError);
    Vector2 := TempIn;
    DecryptAES(TempIn, ExpandedKey, TempOut);
    PLongWord(@TempOut[0])^ := PLongWord(@TempOut[0])^ xor PLongWord(@Vector1[0])^;
    PLongWord(@TempOut[4])^ := PLongWord(@TempOut[4])^ xor PLongWord(@Vector1[4])^;
    PLongWord(@TempOut[8])^ := PLongWord(@TempOut[8])^ xor PLongWord(@Vector1[8])^;
    PLongWord(@TempOut[12])^ := PLongWord(@TempOut[12])^ xor PLongWord(@Vector1[12])^;
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError(SWriteError);
    Vector1 := Vector2;
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey192; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey192;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey192;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Vector1, Vector2: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  Vector1 := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError(SReadError);
    Vector2 := TempIn;
    DecryptAES(TempIn, ExpandedKey, TempOut);
    PLongWord(@TempOut[0])^ := PLongWord(@TempOut[0])^ xor PLongWord(@Vector1[0])^;
    PLongWord(@TempOut[4])^ := PLongWord(@TempOut[4])^ xor PLongWord(@Vector1[4])^;
    PLongWord(@TempOut[8])^ := PLongWord(@TempOut[8])^ xor PLongWord(@Vector1[8])^;
    PLongWord(@TempOut[12])^ := PLongWord(@TempOut[12])^ xor PLongWord(@Vector1[12])^;
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError(SWriteError);
    Vector1 := Vector2;
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const Key: TAESKey256; const InitVector: TAESBuffer; Dest: TStream);
var
  ExpandedKey: TAESExpandedKey256;
begin
  ExpandAESKeyForDecryption(Key, ExpandedKey);
  DecryptAESStreamCBC(Source, Count, ExpandedKey, InitVector, Dest);
end;

procedure DecryptAESStreamCBC(Source: TStream; Count: cardinal;
  const ExpandedKey: TAESExpandedKey256;  const InitVector: TAESBuffer;
  Dest: TStream);
var
  TempIn, TempOut: TAESBuffer;
  Vector1, Vector2: TAESBuffer;
  Done: cardinal;
begin
  if Count = 0 then
  begin
    Source.Position := 0;
    Count := Source.Size;
  end
  else Count := Min(Count, Source.Size - Source.Position);
  if Count = 0 then exit;
  if (Count mod SizeOf(TAESBuffer)) > 0 then
    raise EAESError.Create(SInvalidInBufSize);
  Vector1 := InitVector;
  while Count >= SizeOf(TAESBuffer) do
  begin
    Done := Source.Read(TempIn, SizeOf(TempIn));
    if Done < SizeOf(TempIn) then
      raise EStreamError(SReadError);
    Vector2 := TempIn;
    DecryptAES(TempIn, ExpandedKey, TempOut);
    PLongWord(@TempOut[0])^ := PLongWord(@TempOut[0])^ xor PLongWord(@Vector1[0])^;
    PLongWord(@TempOut[4])^ := PLongWord(@TempOut[4])^ xor PLongWord(@Vector1[4])^;
    PLongWord(@TempOut[8])^ := PLongWord(@TempOut[8])^ xor PLongWord(@Vector1[8])^;
    PLongWord(@TempOut[12])^ := PLongWord(@TempOut[12])^ xor PLongWord(@Vector1[12])^;
    Done := Dest.Write(TempOut, SizeOf(TempOut));
    if Done < SizeOf(TempOut) then
      raise EStreamError(SWriteError);
    Vector1 := Vector2;
    Dec(Count, SizeOf(TAESBuffer));
  end;
end;

end.