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DCPCrypt/Ciphers/DCPcast256.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

374 lines
13 KiB
ObjectPascal
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{******************************************************************************}
{* DCPcrypt v2.1 written by David Barton (crypto@cityinthesky.co.uk) **********}
{******************************************************************************}
{* A binary compatible implementation of Cast256 ******************************}
{******************************************************************************}
{* 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 DCPcast256;
{$INCLUDE '..\dcp.inc'}
interface
uses
Classes, Sysutils, DCPcrypt2, DCPconst, DCPblockciphers;
type
TDCP_cast256= class(TDCP_blockcipher128)
protected
Kr, Km: array[0..11,0..3] of DWord;
procedure InitKey(const Key; Size: longword); override;
public
class function GetId: integer; override;
class function GetAlgorithm: string; override;
class function GetMaxKeySize: integer; override;
class function SelfTest: boolean; override;
procedure Burn; override;
procedure EncryptECB(const InData; var OutData); override;
procedure DecryptECB(const InData; var OutData); override;
end;
{******************************************************************************}
{******************************************************************************}
implementation
{$R-}{$Q-}
{$I DCPcast256.inc}
{$IFDEF DELPHIXE2_UP}
{$POINTERMATH ON}
{$ENDIF}
function LRot32(a, n: dword): dword;
begin
Result:= (a shl n) or (a shr (32-n));
end;
function SwapDword(a: dword): dword;
begin
Result:= ((a and $FF) shl 24) or ((a and $FF00) shl 8) or ((a and $FF0000) shr 8) or ((a and $FF000000) shr 24);
end;
function F1(a,rk,mk: DWord): DWord;
var
t: DWord;
begin
t:= LRot32(mk + a,rk);
Result:= ((S1[t shr 24] xor S2[(t shr 16) and $FF]) - S3[(t shr 8) and $FF]) + S4[t and $FF];
end;
function F2(a,rk,mk: DWord): DWord;
var
t: DWord;
begin
t:= LRot32(mk xor a,rk);
Result:= ((S1[t shr 24] - S2[(t shr 16) and $FF]) + S3[(t shr 8) and $FF]) xor S4[t and $FF];
end;
function F3(a,rk,mk: DWord): DWord;
var
t: DWord;
begin
t:= LRot32(mk - a,rk);
Result:= ((S1[t shr 24] + S2[(t shr 16) and $FF]) xor S3[(t shr 8) and $FF]) - S4[t and $FF];
end;
class function TDCP_cast256.GetMaxKeySize: integer;
begin
Result:= 256;
end;
class function TDCP_cast256.GetId: integer;
begin
Result:= DCP_cast256;
end;
class function TDCP_cast256.GetAlgorithm: string;
begin
Result:= 'Cast256';
end;
class function TDCP_cast256.SelfTest: boolean;
const
Key1: array[0..15] of byte=
($23,$42,$bb,$9e,$fa,$38,$54,$2c,$0a,$f7,$56,$47,$f2,$9f,$61,$5d);
InBlock1: array[0..15] of byte=
($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$0c,$9b,$28,$07);
OutBlock1: array[0..15] of byte=
($96,$3a,$8a,$50,$ce,$b5,$4d,$08,$e0,$de,$e0,$f1,$d0,$41,$3d,$cf);
Key2: array[0..23] of byte=
($23,$42,$bb,$9e,$fa,$38,$54,$2c,$be,$d0,$ac,$83,$94,$0a,$c2,$98,$ba,$c7,$7a,$77,$17,$94,$28,$63);
InBlock2: array[0..15] of byte=
($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$de,$25,$5a,$ff);
OutBlock2: array[0..15] of byte=
($2b,$c1,$92,$9f,$30,$13,$47,$a9,$9d,$3f,$3e,$45,$ad,$34,$01,$e8);
Key3: array[0..31] of byte=
($23,$42,$bb,$9e,$fa,$38,$54,$2c,$be,$d0,$ac,$83,$94,$0a,$c2,$98,$8d,$7c,$47,$ce,$26,$49,$08,$46,$1c,$c1,$b5,$13,$7a,$e6,$b6,$04);
InBlock3: array[0..15] of byte=
($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$c5,$fc,$eb,$19);
OutBlock3: array[0..15] of byte=
($1e,$2e,$bc,$6c,$9f,$2e,$43,$8e,$1d,$90,$d9,$b9,$c6,$85,$32,$86);
var
Block: array[0..15] of byte;
Cipher: TDCP_cast256;
begin
FillChar(Block, SizeOf(Block), 0);
Cipher:= TDCP_cast256.Create(nil);
Cipher.Init(Key1,Sizeof(Key1)*8,nil);
Cipher.EncryptECB(InBlock1,Block);
Result:= boolean(CompareMem(@Block,@OutBlock1,8));
Cipher.DecryptECB(Block,Block);
Result:= Result and boolean(CompareMem(@Block,@InBlock1,16));
Cipher.Burn;
Cipher.Init(Key2,Sizeof(Key2)*8,nil);
Cipher.EncryptECB(InBlock2,Block);
Result:= Result and boolean(CompareMem(@Block,@OutBlock2,8));
Cipher.DecryptECB(Block,Block);
Result:= Result and boolean(CompareMem(@Block,@InBlock2,16));
Cipher.Burn;
Cipher.Init(Key3,Sizeof(Key3)*8,nil);
Cipher.EncryptECB(InBlock3,Block);
Result:= Result and boolean(CompareMem(@Block,@OutBlock3,8));
Cipher.DecryptECB(Block,Block);
Result:= Result and boolean(CompareMem(@Block,@InBlock3,16));
Cipher.Burn;
Cipher.Free;
end;
procedure TDCP_cast256.InitKey(const Key; Size: longword);
var
x: array[0..7] of DWord;
cm, cr: DWord;
i, j: longword;
tr, tm: array[0..7] of DWord;
begin
Size:= Size div 8;
FillChar(x,Sizeof(x),0);
Move(Key,x,Size);
cm:= $5a827999;
cr:= 19;
for i:= 0 to 7 do
x[i]:= (x[i] shl 24) or ((x[i] shl 8) and $FF0000) or ((x[i] shr 8) and $FF00) or (x[i] shr 24);
for i:= 0 to 11 do
begin
for j:= 0 to 7 do
begin
tm[j]:= cm;
Inc(cm,$6ed9eba1);
tr[j]:= cr;
Inc(cr,17);
end;
x[6]:= x[6] xor f1(x[7],tr[0],tm[0]);
x[5]:= x[5] xor f2(x[6],tr[1],tm[1]);
x[4]:= x[4] xor f3(x[5],tr[2],tm[2]);
x[3]:= x[3] xor f1(x[4],tr[3],tm[3]);
x[2]:= x[2] xor f2(x[3],tr[4],tm[4]);
x[1]:= x[1] xor f3(x[2],tr[5],tm[5]);
x[0]:= x[0] xor f1(x[1],tr[6],tm[6]);
x[7]:= x[7] xor f2(x[0],tr[7],tm[7]);
for j:= 0 to 7 do
begin
tm[j]:= cm;
Inc(cm,$6ed9eba1);
tr[j]:= cr;
Inc(cr,17);
end;
x[6]:= x[6] xor f1(x[7],tr[0],tm[0]);
x[5]:= x[5] xor f2(x[6],tr[1],tm[1]);
x[4]:= x[4] xor f3(x[5],tr[2],tm[2]);
x[3]:= x[3] xor f1(x[4],tr[3],tm[3]);
x[2]:= x[2] xor f2(x[3],tr[4],tm[4]);
x[1]:= x[1] xor f3(x[2],tr[5],tm[5]);
x[0]:= x[0] xor f1(x[1],tr[6],tm[6]);
x[7]:= x[7] xor f2(x[0],tr[7],tm[7]);
Kr[i,0]:= x[0] and 31;
Kr[i,1]:= x[2] and 31;
Kr[i,2]:= x[4] and 31;
Kr[i,3]:= x[6] and 31;
Km[i,0]:= x[7];
Km[i,1]:= x[5];
Km[i,2]:= x[3];
Km[i,3]:= x[1];
end;
FillChar(x,Sizeof(x),$FF);
end;
procedure TDCP_cast256.Burn;
begin
FillChar(Kr,Sizeof(Kr),$FF);
FillChar(Km,Sizeof(Km),$FF);
inherited Burn;
end;
procedure TDCP_cast256.EncryptECB(const InData; var OutData);
var
A: array[0..3] of DWord;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
A[0]:= PDWord(@InData)^;
A[1]:= PDWord(PointerToInt(@InData)+4)^;
A[2]:= PDWord(PointerToInt(@InData)+8)^;
A[3]:= PDWord(PointerToInt(@InData)+12)^;
A[0]:= SwapDWord(A[0]);
A[1]:= SwapDWord(A[1]);
A[2]:= SwapDWord(A[2]);
A[3]:= SwapDWord(A[3]);
A[2]:= A[2] xor f1(A[3],kr[0,0],km[0,0]);
A[1]:= A[1] xor f2(A[2],kr[0,1],km[0,1]);
A[0]:= A[0] xor f3(A[1],kr[0,2],km[0,2]);
A[3]:= A[3] xor f1(A[0],kr[0,3],km[0,3]);
A[2]:= A[2] xor f1(A[3],kr[1,0],km[1,0]);
A[1]:= A[1] xor f2(A[2],kr[1,1],km[1,1]);
A[0]:= A[0] xor f3(A[1],kr[1,2],km[1,2]);
A[3]:= A[3] xor f1(A[0],kr[1,3],km[1,3]);
A[2]:= A[2] xor f1(A[3],kr[2,0],km[2,0]);
A[1]:= A[1] xor f2(A[2],kr[2,1],km[2,1]);
A[0]:= A[0] xor f3(A[1],kr[2,2],km[2,2]);
A[3]:= A[3] xor f1(A[0],kr[2,3],km[2,3]);
A[2]:= A[2] xor f1(A[3],kr[3,0],km[3,0]);
A[1]:= A[1] xor f2(A[2],kr[3,1],km[3,1]);
A[0]:= A[0] xor f3(A[1],kr[3,2],km[3,2]);
A[3]:= A[3] xor f1(A[0],kr[3,3],km[3,3]);
A[2]:= A[2] xor f1(A[3],kr[4,0],km[4,0]);
A[1]:= A[1] xor f2(A[2],kr[4,1],km[4,1]);
A[0]:= A[0] xor f3(A[1],kr[4,2],km[4,2]);
A[3]:= A[3] xor f1(A[0],kr[4,3],km[4,3]);
A[2]:= A[2] xor f1(A[3],kr[5,0],km[5,0]);
A[1]:= A[1] xor f2(A[2],kr[5,1],km[5,1]);
A[0]:= A[0] xor f3(A[1],kr[5,2],km[5,2]);
A[3]:= A[3] xor f1(A[0],kr[5,3],km[5,3]);
A[3]:= A[3] xor f1(A[0],kr[6,3],km[6,3]);
A[0]:= A[0] xor f3(A[1],kr[6,2],km[6,2]);
A[1]:= A[1] xor f2(A[2],kr[6,1],km[6,1]);
A[2]:= A[2] xor f1(A[3],kr[6,0],km[6,0]);
A[3]:= A[3] xor f1(A[0],kr[7,3],km[7,3]);
A[0]:= A[0] xor f3(A[1],kr[7,2],km[7,2]);
A[1]:= A[1] xor f2(A[2],kr[7,1],km[7,1]);
A[2]:= A[2] xor f1(A[3],kr[7,0],km[7,0]);
A[3]:= A[3] xor f1(A[0],kr[8,3],km[8,3]);
A[0]:= A[0] xor f3(A[1],kr[8,2],km[8,2]);
A[1]:= A[1] xor f2(A[2],kr[8,1],km[8,1]);
A[2]:= A[2] xor f1(A[3],kr[8,0],km[8,0]);
A[3]:= A[3] xor f1(A[0],kr[9,3],km[9,3]);
A[0]:= A[0] xor f3(A[1],kr[9,2],km[9,2]);
A[1]:= A[1] xor f2(A[2],kr[9,1],km[9,1]);
A[2]:= A[2] xor f1(A[3],kr[9,0],km[9,0]);
A[3]:= A[3] xor f1(A[0],kr[10,3],km[10,3]);
A[0]:= A[0] xor f3(A[1],kr[10,2],km[10,2]);
A[1]:= A[1] xor f2(A[2],kr[10,1],km[10,1]);
A[2]:= A[2] xor f1(A[3],kr[10,0],km[10,0]);
A[3]:= A[3] xor f1(A[0],kr[11,3],km[11,3]);
A[0]:= A[0] xor f3(A[1],kr[11,2],km[11,2]);
A[1]:= A[1] xor f2(A[2],kr[11,1],km[11,1]);
A[2]:= A[2] xor f1(A[3],kr[11,0],km[11,0]);
A[0]:= SwapDWord(A[0]);
A[1]:= SwapDWord(A[1]);
A[2]:= SwapDWord(A[2]);
A[3]:= SwapDWord(A[3]);
PDWord(@OutData)^:= A[0];
PDWord(PointerToInt(@OutData)+4)^:= A[1];
PDWord(PointerToInt(@OutData)+8)^:= A[2];
PDWord(PointerToInt(@OutData)+12)^:= A[3];
end;
procedure TDCP_cast256.DecryptECB(const InData; var OutData);
var
A: array[0..3] of DWord;
begin
if not fInitialized then
raise EDCP_blockcipher.Create('Cipher not initialized');
A[0]:= PDWord(@InData)^;
A[1]:= PDWord(PointerToInt(@InData)+4)^;
A[2]:= PDWord(PointerToInt(@InData)+8)^;
A[3]:= PDWord(PointerToInt(@InData)+12)^;
A[0]:= SwapDWord(A[0]);
A[1]:= SwapDWord(A[1]);
A[2]:= SwapDWord(A[2]);
A[3]:= SwapDWord(A[3]);
A[2]:= A[2] xor f1(A[3],kr[11,0],km[11,0]);
A[1]:= A[1] xor f2(A[2],kr[11,1],km[11,1]);
A[0]:= A[0] xor f3(A[1],kr[11,2],km[11,2]);
A[3]:= A[3] xor f1(A[0],kr[11,3],km[11,3]);
A[2]:= A[2] xor f1(A[3],kr[10,0],km[10,0]);
A[1]:= A[1] xor f2(A[2],kr[10,1],km[10,1]);
A[0]:= A[0] xor f3(A[1],kr[10,2],km[10,2]);
A[3]:= A[3] xor f1(A[0],kr[10,3],km[10,3]);
A[2]:= A[2] xor f1(A[3],kr[9,0],km[9,0]);
A[1]:= A[1] xor f2(A[2],kr[9,1],km[9,1]);
A[0]:= A[0] xor f3(A[1],kr[9,2],km[9,2]);
A[3]:= A[3] xor f1(A[0],kr[9,3],km[9,3]);
A[2]:= A[2] xor f1(A[3],kr[8,0],km[8,0]);
A[1]:= A[1] xor f2(A[2],kr[8,1],km[8,1]);
A[0]:= A[0] xor f3(A[1],kr[8,2],km[8,2]);
A[3]:= A[3] xor f1(A[0],kr[8,3],km[8,3]);
A[2]:= A[2] xor f1(A[3],kr[7,0],km[7,0]);
A[1]:= A[1] xor f2(A[2],kr[7,1],km[7,1]);
A[0]:= A[0] xor f3(A[1],kr[7,2],km[7,2]);
A[3]:= A[3] xor f1(A[0],kr[7,3],km[7,3]);
A[2]:= A[2] xor f1(A[3],kr[6,0],km[6,0]);
A[1]:= A[1] xor f2(A[2],kr[6,1],km[6,1]);
A[0]:= A[0] xor f3(A[1],kr[6,2],km[6,2]);
A[3]:= A[3] xor f1(A[0],kr[6,3],km[6,3]);
A[3]:= A[3] xor f1(A[0],kr[5,3],km[5,3]);
A[0]:= A[0] xor f3(A[1],kr[5,2],km[5,2]);
A[1]:= A[1] xor f2(A[2],kr[5,1],km[5,1]);
A[2]:= A[2] xor f1(A[3],kr[5,0],km[5,0]);
A[3]:= A[3] xor f1(A[0],kr[4,3],km[4,3]);
A[0]:= A[0] xor f3(A[1],kr[4,2],km[4,2]);
A[1]:= A[1] xor f2(A[2],kr[4,1],km[4,1]);
A[2]:= A[2] xor f1(A[3],kr[4,0],km[4,0]);
A[3]:= A[3] xor f1(A[0],kr[3,3],km[3,3]);
A[0]:= A[0] xor f3(A[1],kr[3,2],km[3,2]);
A[1]:= A[1] xor f2(A[2],kr[3,1],km[3,1]);
A[2]:= A[2] xor f1(A[3],kr[3,0],km[3,0]);
A[3]:= A[3] xor f1(A[0],kr[2,3],km[2,3]);
A[0]:= A[0] xor f3(A[1],kr[2,2],km[2,2]);
A[1]:= A[1] xor f2(A[2],kr[2,1],km[2,1]);
A[2]:= A[2] xor f1(A[3],kr[2,0],km[2,0]);
A[3]:= A[3] xor f1(A[0],kr[1,3],km[1,3]);
A[0]:= A[0] xor f3(A[1],kr[1,2],km[1,2]);
A[1]:= A[1] xor f2(A[2],kr[1,1],km[1,1]);
A[2]:= A[2] xor f1(A[3],kr[1,0],km[1,0]);
A[3]:= A[3] xor f1(A[0],kr[0,3],km[0,3]);
A[0]:= A[0] xor f3(A[1],kr[0,2],km[0,2]);
A[1]:= A[1] xor f2(A[2],kr[0,1],km[0,1]);
A[2]:= A[2] xor f1(A[3],kr[0,0],km[0,0]);
A[0]:= SwapDWord(A[0]);
A[1]:= SwapDWord(A[1]);
A[2]:= SwapDWord(A[2]);
A[3]:= SwapDWord(A[3]);
PDWord(@OutData)^:= A[0];
PDWord(PointerToInt(@OutData)+4)^:= A[1];
PDWord(PointerToInt(@OutData)+8)^:= A[2];
PDWord(PointerToInt(@OutData)+12)^:= A[3];
end;
end.
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