procedure ExpandAESKeyForDecryption(var ExpandedKey: TAESExpandedKey256); overload;
procedure ExpandAESKeyForDecryption(const Key: TAESKey256;
var ExpandedKey: TAESExpandedKey256); overload;
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;
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;
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'; //第一部分结束
var
Form1: TForm1;
implementation
{$R *.dfm}
type //第二部分开始
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;
function StringToHex(S: string): string;
var
i: integer;
begin
Result := '';
for i := 1 to Length( S ) do
Result := Result + IntToHex( Ord( S[i] ), 2 );
end;
function HexToString(S: string): string;
var
i: integer;
begin
Result := '';
for i := 1 to Length( S ) do
begin
if ((i mod 2) = 1) then
Result := Result + Chr( StrToInt( '0x' + Copy( S, i, 2 )));
end;
end; //第二部分结束
procedure TForm1.Button1Click(Sender: TObject);
var
Source: TStringStream;
Dest: TStringStream;
Start, Stop: cardinal;
Size: integer;
Key: TAESKey128;
RegCode:String;
begin
Source := TStringStream.Create(Edit1.Text);
Dest := TStringStream.Create( '' );
try
Size := Source.Size;
Dest.WriteBuffer( Size, SizeOf(Size) );
FillChar( Key, SizeOf(Key), 0 );
Move( PChar('ksaiy')^, Key, Min( SizeOf( Key ), Length('ksaiy')));//此处ksaiy为key，您可以自己设定自己的key;
Start := GetTickCount;
EncryptAESStreamECB( Source, 0, Key, Dest );
Stop := GetTickCount;
RegCode:= StringToHex( Dest.DataString );
finally
Source.Free;
Dest.Free;
end;
if RegCode=Edit2.Text then
ShowMessage('注册成功！')
else
ShowMessage('注册失败');
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
application.Terminate;
end;