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DCPCrypt/Ciphers/DCPrijndael.pas
Stephen Genusa 5fc435d45f Initial Commit with XE7 Package Files added 
DCPCrypt by David Barton updated and tested with Delphi 2009, 2010, XE,
XE2, XE3, XE4, XE5 by Warren Postma. Updated for XE7 by Stephen Genusa.
2015-03-08 18:30:34 -05:00

368 lines
12 KiB
ObjectPascal
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{******************************************************************************}
{* DCPcrypt v2.1 written by David Barton (crypto@cityinthesky.co.uk) **********}
{******************************************************************************}
{* A binary compatible implementation of Rijndael *****************************}
{******************************************************************************}
{* Copyright (c) 1999-2002 David Barton *}
{* Permission is hereby granted, free of charge, to any person obtaining a *}
{* copy of this software and associated documentation files (the "Software"), *}
{* to deal in the Software without restriction, including without limitation *}
{* the rights to use, copy, modify, merge, publish, distribute, sublicense, *}
{* and/or sell copies of the Software, and to permit persons to whom the *}
{* Software is furnished to do so, subject to the following conditions: *}
{* *}
{* The above copyright notice and this permission notice shall be included in *}
{* all copies or substantial portions of the Software. *}
{* *}
{* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *}
{* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *}
{* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *}
{* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *}
{* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *}
{* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *}
{* DEALINGS IN THE SOFTWARE. *}
{******************************************************************************}
unit DCPrijndael;
{$INCLUDE '..\dcp.inc'}
interface
uses
Classes, Sysutils, DCPcrypt2, DCPconst, DCPblockciphers;
const
BC= 4;
MAXROUNDS= 14;
type
TDCP_rijndael= class(TDCP_blockcipher128)
protected
numrounds: longword;
rk, drk: array[0..MAXROUNDS,0..7] of DWord;
procedure InitKey(const Key; Size: longword); override;
public
class function GetId: integer; override;
class function GetAlgorithm: string; override;
class function GetMaxKeySize: integer; override;
class function SelfTest: boolean; override;
procedure Burn; override;
procedure EncryptECB(const InData; var OutData); override;
procedure DecryptECB(const InData; var OutData); override;
end;
{******************************************************************************}
{******************************************************************************}
implementation
{$R-}{$Q-}
{$I DCPrijndael.inc}
{$IFDEF DELPHIXE2_UP}
{$POINTERMATH ON}
{$ENDIF}
class function TDCP_rijndael.GetMaxKeySize: integer;
begin
Result:= 256;
end;
class function TDCP_rijndael.GetID: integer;
begin
Result:= DCP_rijndael;
end;
class function TDCP_rijndael.GetAlgorithm: string;
begin
Result:= 'Rijndael';
end;
class function TDCP_rijndael.SelfTest: boolean;
const
Key1: array[0..15] of byte=
($00,$01,$02,$03,$05,$06,$07,$08,$0A,$0B,$0C,$0D,$0F,$10,$11,$12);
InData1: array[0..15] of byte=
($50,$68,$12,$A4,$5F,$08,$C8,$89,$B9,$7F,$59,$80,$03,$8B,$83,$59);
OutData1: array[0..15] of byte=
($D8,$F5,$32,$53,$82,$89,$EF,$7D,$06,$B5,$06,$A4,$FD,$5B,$E9,$C9);
Key2: array[0..23] of byte=
($A0,$A1,$A2,$A3,$A5,$A6,$A7,$A8,$AA,$AB,$AC,$AD,$AF,$B0,$B1,$B2,
$B4,$B5,$B6,$B7,$B9,$BA,$BB,$BC);
InData2: array[0..15] of byte=
($4F,$1C,$76,$9D,$1E,$5B,$05,$52,$C7,$EC,$A8,$4D,$EA,$26,$A5,$49);
OutData2: array[0..15] of byte=
($F3,$84,$72,$10,$D5,$39,$1E,$23,$60,$60,$8E,$5A,$CB,$56,$05,$81);
Key3: array[0..31] of byte=
($00,$01,$02,$03,$05,$06,$07,$08,$0A,$0B,$0C,$0D,$0F,$10,$11,$12,
$14,$15,$16,$17,$19,$1A,$1B,$1C,$1E,$1F,$20,$21,$23,$24,$25,$26);
InData3: array[0..15] of byte=
($5E,$25,$CA,$78,$F0,$DE,$55,$80,$25,$24,$D3,$8D,$A3,$FE,$44,$56);
OutData3: array[0..15] of byte=
($E8,$B7,$2B,$4E,$8B,$E2,$43,$43,$8C,$9F,$FF,$1F,$0E,$20,$58,$72);
var
Block: array[0..15] of byte;
Cipher: TDCP_rijndael;
begin
FillChar(Block, SizeOf(Block), 0);
Cipher:= TDCP_rijndael.Create(nil);
Cipher.Init(Key1,Sizeof(Key1)*8,nil);
Cipher.EncryptECB(InData1,Block);
Result:= boolean(CompareMem(@Block,@OutData1,16));
Cipher.DecryptECB(Block,Block);
Cipher.Burn;
Result:= Result and boolean(CompareMem(@Block,@InData1,16));
Cipher.Init(Key2,Sizeof(Key2)*8,nil);
Cipher.EncryptECB(InData2,Block);
Result:= Result and boolean(CompareMem(@Block,@OutData2,16));
Cipher.DecryptECB(Block,Block);
Cipher.Burn;
Result:= Result and boolean(CompareMem(@Block,@InData2,16));
Cipher.Init(Key3,Sizeof(Key3)*8,nil);
Cipher.EncryptECB(InData3,Block);
Result:= Result and boolean(CompareMem(@Block,@OutData3,16));
Cipher.DecryptECB(Block,Block);
Cipher.Burn;
Result:= Result and boolean(CompareMem(@Block,@InData3,16));
Cipher.Free;
end;
procedure InvMixColumn(a: PByteArray; BC: byte);
var
j: longword;
begin
for j:= 0 to (BC-1) do
PDWord(@(a^[j*4]))^:= PDWord(@U1[a^[j*4+0]])^ xor
PDWord(@U2[a^[j*4+1]])^ xor
PDWord(@U3[a^[j*4+2]])^ xor
PDWord(@U4[a^[j*4+3]])^;
end;
procedure TDCP_rijndael.InitKey(const Key; Size: longword);
var
KC, ROUNDS, j, r, t, rconpointer: longword;
tk: array[0..MAXKC-1,0..3] of byte;
begin
Size:= Size div 8;
FillChar(tk,Sizeof(tk),0);
Move(Key,tk,Size);
if Size<= 16 then
begin
KC:= 4;
Rounds:= 10;
end
else if Size<= 24 then
begin
KC:= 6;
Rounds:= 12;
end
else
begin
KC:= 8;
Rounds:= 14;
end;
numrounds:= rounds;
r:= 0;
t:= 0;
j:= 0;
while (j< KC) and (r< (rounds+1)) do
begin
while (j< KC) and (t< BC) do
begin
rk[r,t]:= PDWord(@tk[j])^;
Inc(j);
Inc(t);
end;
if t= BC then
begin
t:= 0;
Inc(r);
end;
end;
rconpointer:= 0;
while (r< (rounds+1)) do
begin
tk[0,0]:= tk[0,0] xor S[tk[KC-1,1]];
tk[0,1]:= tk[0,1] xor S[tk[KC-1,2]];
tk[0,2]:= tk[0,2] xor S[tk[KC-1,3]];
tk[0,3]:= tk[0,3] xor S[tk[KC-1,0]];
tk[0,0]:= tk[0,0] xor rcon[rconpointer];
Inc(rconpointer);
if KC<> 8 then
begin
for j:= 1 to (KC-1) do
PDWord(@tk[j])^:= PDWord(@tk[j])^ xor PDWord(@tk[j-1])^;
end
else
begin
for j:= 1 to ((KC div 2)-1) do
PDWord(@tk[j])^:= PDWord(@tk[j])^ xor PDWord(@tk[j-1])^;
tk[KC div 2,0]:= tk[KC div 2,0] xor S[tk[KC div 2 - 1,0]];
tk[KC div 2,1]:= tk[KC div 2,1] xor S[tk[KC div 2 - 1,1]];
tk[KC div 2,2]:= tk[KC div 2,2] xor S[tk[KC div 2 - 1,2]];
tk[KC div 2,3]:= tk[KC div 2,3] xor S[tk[KC div 2 - 1,3]];
for j:= ((KC div 2) + 1) to (KC-1) do
PDWord(@tk[j])^:= PDWord(@tk[j])^ xor PDWord(@tk[j-1])^;
end;
j:= 0;
while (j< KC) and (r< (rounds+1)) do
begin
while (j< KC) and (t< BC) do
begin
rk[r,t]:= PDWord(@tk[j])^;
Inc(j);
Inc(t);
end;
if t= BC then
begin
Inc(r);
t:= 0;
end;
end;
end;
Move(rk,drk,Sizeof(rk));
for r:= 1 to (numrounds-1) do
InvMixColumn(@drk[r],BC);
end;
procedure TDCP_rijndael.Burn;
begin
numrounds:= 0;
FillChar(rk,Sizeof(rk),0);
FillChar(drk,Sizeof(drk),0);
inherited Burn;
end;
procedure TDCP_rijndael.EncryptECB(const InData; var OutData);
var
r: longword;
tempb: array[0..MAXBC-1,0..3] of byte;
a: array[0..MAXBC,0..3] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
PDword(@a[0,0])^:= PDword(@InData)^;
PDword(@a[1,0])^:= PDword(PointerToInt(@InData)+4)^;
PDword(@a[2,0])^:= PDword(PointerToInt(@InData)+8)^;
PDword(@a[3,0])^:= PDword(PointerToInt(@InData)+12)^;
for r:= 0 to (numrounds-2) do
begin
PDWord(@tempb[0])^:= PDWord(@a[0])^ xor rk[r,0];
PDWord(@tempb[1])^:= PDWord(@a[1])^ xor rk[r,1];
PDWord(@tempb[2])^:= PDWord(@a[2])^ xor rk[r,2];
PDWord(@tempb[3])^:= PDWord(@a[3])^ xor rk[r,3];
PDWord(@a[0])^:= PDWord(@T1[tempb[0,0]])^ xor
PDWord(@T2[tempb[1,1]])^ xor
PDWord(@T3[tempb[2,2]])^ xor
PDWord(@T4[tempb[3,3]])^;
PDWord(@a[1])^:= PDWord(@T1[tempb[1,0]])^ xor
PDWord(@T2[tempb[2,1]])^ xor
PDWord(@T3[tempb[3,2]])^ xor
PDWord(@T4[tempb[0,3]])^;
PDWord(@a[2])^:= PDWord(@T1[tempb[2,0]])^ xor
PDWord(@T2[tempb[3,1]])^ xor
PDWord(@T3[tempb[0,2]])^ xor
PDWord(@T4[tempb[1,3]])^;
PDWord(@a[3])^:= PDWord(@T1[tempb[3,0]])^ xor
PDWord(@T2[tempb[0,1]])^ xor
PDWord(@T3[tempb[1,2]])^ xor
PDWord(@T4[tempb[2,3]])^;
end;
PDWord(@tempb[0])^:= PDWord(@a[0])^ xor rk[numrounds-1,0];
PDWord(@tempb[1])^:= PDWord(@a[1])^ xor rk[numrounds-1,1];
PDWord(@tempb[2])^:= PDWord(@a[2])^ xor rk[numrounds-1,2];
PDWord(@tempb[3])^:= PDWord(@a[3])^ xor rk[numrounds-1,3];
a[0,0]:= T1[tempb[0,0],1];
a[0,1]:= T1[tempb[1,1],1];
a[0,2]:= T1[tempb[2,2],1];
a[0,3]:= T1[tempb[3,3],1];
a[1,0]:= T1[tempb[1,0],1];
a[1,1]:= T1[tempb[2,1],1];
a[1,2]:= T1[tempb[3,2],1];
a[1,3]:= T1[tempb[0,3],1];
a[2,0]:= T1[tempb[2,0],1];
a[2,1]:= T1[tempb[3,1],1];
a[2,2]:= T1[tempb[0,2],1];
a[2,3]:= T1[tempb[1,3],1];
a[3,0]:= T1[tempb[3,0],1];
a[3,1]:= T1[tempb[0,1],1];
a[3,2]:= T1[tempb[1,2],1];
a[3,3]:= T1[tempb[2,3],1];
PDWord(@a[0])^:= PDWord(@a[0])^ xor rk[numrounds,0];
PDWord(@a[1])^:= PDWord(@a[1])^ xor rk[numrounds,1];
PDWord(@a[2])^:= PDWord(@a[2])^ xor rk[numrounds,2];
PDWord(@a[3])^:= PDWord(@a[3])^ xor rk[numrounds,3];
PDword(@OutData)^:= PDword(@a[0,0])^;
PDword(PointerToInt(@OutData)+4)^:= PDword(@a[1,0])^;
PDword(PointerToInt(@OutData)+8)^:= PDword(@a[2,0])^;
PDword(PointerToInt(@OutData)+12)^:= PDword(@a[3,0])^;
end;
procedure TDCP_rijndael.DecryptECB(const InData; var OutData);
var
r: longword;
tempb: array[0..MAXBC-1,0..3] of byte;
a: array[0..MAXBC,0..3] of byte;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
PDword(@a[0,0])^:= PDword(@InData)^;
PDword(@a[1,0])^:= PDword(PointerToInt(@InData)+4)^;
PDword(@a[2,0])^:= PDword(PointerToInt(@InData)+8)^;
PDword(@a[3,0])^:= PDword(PointerToInt(@InData)+12)^;
for r:= NumRounds downto 2 do
begin
PDWord(@tempb[0])^:= PDWord(@a[0])^ xor drk[r,0];
PDWord(@tempb[1])^:= PDWord(@a[1])^ xor drk[r,1];
PDWord(@tempb[2])^:= PDWord(@a[2])^ xor drk[r,2];
PDWord(@tempb[3])^:= PDWord(@a[3])^ xor drk[r,3];
PDWord(@a[0])^:= PDWord(@T5[tempb[0,0]])^ xor
PDWord(@T6[tempb[3,1]])^ xor
PDWord(@T7[tempb[2,2]])^ xor
PDWord(@T8[tempb[1,3]])^;
PDWord(@a[1])^:= PDWord(@T5[tempb[1,0]])^ xor
PDWord(@T6[tempb[0,1]])^ xor
PDWord(@T7[tempb[3,2]])^ xor
PDWord(@T8[tempb[2,3]])^;
PDWord(@a[2])^:= PDWord(@T5[tempb[2,0]])^ xor
PDWord(@T6[tempb[1,1]])^ xor
PDWord(@T7[tempb[0,2]])^ xor
PDWord(@T8[tempb[3,3]])^;
PDWord(@a[3])^:= PDWord(@T5[tempb[3,0]])^ xor
PDWord(@T6[tempb[2,1]])^ xor
PDWord(@T7[tempb[1,2]])^ xor
PDWord(@T8[tempb[0,3]])^;
end;
PDWord(@tempb[0])^:= PDWord(@a[0])^ xor drk[1,0];
PDWord(@tempb[1])^:= PDWord(@a[1])^ xor drk[1,1];
PDWord(@tempb[2])^:= PDWord(@a[2])^ xor drk[1,2];
PDWord(@tempb[3])^:= PDWord(@a[3])^ xor drk[1,3];
a[0,0]:= S5[tempb[0,0]];
a[0,1]:= S5[tempb[3,1]];
a[0,2]:= S5[tempb[2,2]];
a[0,3]:= S5[tempb[1,3]];
a[1,0]:= S5[tempb[1,0]];
a[1,1]:= S5[tempb[0,1]];
a[1,2]:= S5[tempb[3,2]];
a[1,3]:= S5[tempb[2,3]];
a[2,0]:= S5[tempb[2,0]];
a[2,1]:= S5[tempb[1,1]];
a[2,2]:= S5[tempb[0,2]];
a[2,3]:= S5[tempb[3,3]];
a[3,0]:= S5[tempb[3,0]];
a[3,1]:= S5[tempb[2,1]];
a[3,2]:= S5[tempb[1,2]];
a[3,3]:= S5[tempb[0,3]];
PDWord(@a[0])^:= PDWord(@a[0])^ xor drk[0,0];
PDWord(@a[1])^:= PDWord(@a[1])^ xor drk[0,1];
PDWord(@a[2])^:= PDWord(@a[2])^ xor drk[0,2];
PDWord(@a[3])^:= PDWord(@a[3])^ xor drk[0,3];
PDword(@OutData)^:= PDword(@a[0,0])^;
PDword(PointerToInt(@OutData)+4)^:= PDword(@a[1,0])^;
PDword(PointerToInt(@OutData)+8)^:= PDword(@a[2,0])^;
PDword(PointerToInt(@OutData)+12)^:= PDword(@a[3,0])^;
end;
end.
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