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Simba/Units/Misc/dcptiger.pas
John P (Dgby714) f14f484c28 Simba: Hash Functions
2010-10-22 06:07:13 -04:00

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{******************************************************************************}
{* DCPcrypt v2.0 written by David Barton (crypto@cityinthesky.co.uk) **********}
{******************************************************************************}
{* A binary compatible implementation of Tiger ********************************}
{******************************************************************************}
{* Copyright (c) 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 DCPtiger;
{$MODE Delphi}
interface
uses
Classes, Sysutils, DCPcrypt2, DCPconst;
type
TDCP_tiger= class(TDCP_hash)
protected
Len: int64;
Index: DWord;
CurrentHash: array[0..2] of int64;
HashBuffer: array[0..63] of byte;
procedure Compress;
public
class function GetId: integer; override;
class function GetAlgorithm: string; override;
class function GetHashSize: integer; override;
class function SelfTest: boolean; override;
procedure Init; override;
procedure Burn; override;
procedure Update(const Buffer; Size: longword); override;
procedure Final(var Digest); override;
end;
{******************************************************************************}
{******************************************************************************}
implementation
{$R-}{$Q-}
{$INCLUDE DCPtiger.inc}
procedure TDCP_tiger.Compress;
var
a, b, c, aa, bb, cc: int64;
x: array[0..7] of int64;
begin
dcpFillChar(x, SizeOf(x), 0);
a:= CurrentHash[0]; aa:= a;
b:= CurrentHash[1]; bb:= b;
c:= CurrentHash[2]; cc:= c;
Move(HashBuffer,x,Sizeof(x));
c:= c xor x[0];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 5;
a:= a xor x[1];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 5;
b:= b xor x[2];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 5;
c:= c xor x[3];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 5;
a:= a xor x[4];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 5;
b:= b xor x[5];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 5;
c:= c xor x[6];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 5;
a:= a xor x[7];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 5;
x[0]:= x[0] - (x[7] xor $A5A5A5A5A5A5A5A5);
x[1]:= x[1] xor x[0];
x[2]:= x[2] + x[1];
x[3]:= x[3] - (x[2] xor ((not x[1]) shl 19));
x[4]:= x[4] xor x[3];
x[5]:= x[5] + x[4];
x[6]:= x[6] - (x[5] xor ((not x[4]) shr 23));
x[7]:= x[7] xor x[6];
x[0]:= x[0] + x[7];
x[1]:= x[1] - (x[0] xor ((not x[7]) shl 19));
x[2]:= x[2] xor x[1];
x[3]:= x[3] + x[2];
x[4]:= x[4] - (x[3] xor ((not x[2]) shr 23));
x[5]:= x[5] xor x[4];
x[6]:= x[6] + x[5];
x[7]:= x[7] - (x[6] xor $0123456789ABCDEF);
b:= b xor x[0];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 7;
c:= c xor x[1];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 7;
a:= a xor x[2];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 7;
b:= b xor x[3];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 7;
c:= c xor x[4];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 7;
a:= a xor x[5];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 7;
b:= b xor x[6];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 7;
c:= c xor x[7];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 7;
x[0]:= x[0] - (x[7] xor $A5A5A5A5A5A5A5A5);
x[1]:= x[1] xor x[0];
x[2]:= x[2] + x[1];
x[3]:= x[3] - (x[2] xor ((not x[1]) shl 19));
x[4]:= x[4] xor x[3];
x[5]:= x[5] + x[4];
x[6]:= x[6] - (x[5] xor ((not x[4]) shr 23));
x[7]:= x[7] xor x[6];
x[0]:= x[0] + x[7];
x[1]:= x[1] - (x[0] xor ((not x[7]) shl 19));
x[2]:= x[2] xor x[1];
x[3]:= x[3] + x[2];
x[4]:= x[4] - (x[3] xor ((not x[2]) shr 23));
x[5]:= x[5] xor x[4];
x[6]:= x[6] + x[5];
x[7]:= x[7] - (x[6] xor $0123456789ABCDEF);
a:= a xor x[0];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 9;
b:= b xor x[1];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 9;
c:= c xor x[2];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 9;
a:= a xor x[3];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 9;
b:= b xor x[4];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 9;
c:= c xor x[5];
a:= a - (t1[c and $FF] xor t2[(c shr 16) and $FF] xor t3[(c shr 32) and $FF] xor t4[(c shr 48) and $FF]);
b:= b + (t4[(c shr 8) and $FF] xor t3[(c shr 24) and $FF] xor t2[(c shr 40) and $FF] xor t1[(c shr 56) and $FF]);
b:= b * 9;
a:= a xor x[6];
b:= b - (t1[a and $FF] xor t2[(a shr 16) and $FF] xor t3[(a shr 32) and $FF] xor t4[(a shr 48) and $FF]);
c:= c + (t4[(a shr 8) and $FF] xor t3[(a shr 24) and $FF] xor t2[(a shr 40) and $FF] xor t1[(a shr 56) and $FF]);
c:= c * 9;
b:= b xor x[7];
c:= c - (t1[b and $FF] xor t2[(b shr 16) and $FF] xor t3[(b shr 32) and $FF] xor t4[(b shr 48) and $FF]);
a:= a + (t4[(b shr 8) and $FF] xor t3[(b shr 24) and $FF] xor t2[(b shr 40) and $FF] xor t1[(b shr 56) and $FF]);
a:= a * 9;
CurrentHash[0]:= a xor aa;
CurrentHash[1]:= b - bb;
CurrentHash[2]:= c + cc;
Index:= 0;
FillChar(HashBuffer,Sizeof(HashBuffer),0);
end;
class function TDCP_tiger.GetHashSize: integer;
begin
Result:= 192;
end;
class function TDCP_tiger.GetId: integer;
begin
Result:= DCP_tiger;
end;
class function TDCP_tiger.GetAlgorithm: string;
begin
Result:= 'Tiger';
end;
class function TDCP_tiger.SelfTest: boolean;
const
Test1Out: array[0..2] of int64=
($87FB2A9083851CF7,$470D2CF810E6DF9E,$B586445034A5A386);
Test2Out: array[0..2] of int64=
($0C410A042968868A,$1671DA5A3FD29A72,$5EC1E457D3CDB303);
var
TestHash: TDCP_tiger;
TestOut: array[0..2] of int64;
begin
dcpFillChar(TestOut, SizeOf(TestOut), 0);
TestHash:= TDCP_tiger.Create(nil);
TestHash.Init;
TestHash.UpdateStr('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+-');
TestHash.Final(TestOut);
Result:= CompareMem(@TestOut,@Test1Out,Sizeof(Test1Out));
TestHash.Init;
TestHash.UpdateStr('Tiger - A Fast New Hash Function, by Ross Anderson and Eli Biham');
TestHash.Final(TestOut);
Result:= CompareMem(@TestOut,@Test2Out,Sizeof(Test2Out)) and Result;
TestHash.Free;
end;
procedure TDCP_tiger.Init;
begin
Burn;
fInitialized:= true;
CurrentHash[0]:= $0123456789ABCDEF;
CurrentHash[1]:= $FEDCBA9876543210;
CurrentHash[2]:= $F096A5B4C3B2E187;
end;
procedure TDCP_tiger.Burn;
begin
Len:= 0;
Index:= 0;
FillChar(HashBuffer,Sizeof(HashBuffer),0);
FillChar(CurrentHash,Sizeof(CurrentHash),0);
fInitialized:= false;
end;
procedure TDCP_tiger.Update(const Buffer; Size: longword);
var
PBuf: ^byte;
begin
if not fInitialized then
raise EDCP_hash.Create('Hash not initialized');
Inc(Len,Size*8);
PBuf:= @Buffer;
while Size> 0 do
begin
if (Sizeof(HashBuffer)-Index)<= DWord(Size) then
begin
Move(PBuf^,HashBuffer[Index],Sizeof(HashBuffer)-Index);
Dec(Size,Sizeof(HashBuffer)-Index);
Inc(PBuf,Sizeof(HashBuffer)-Index);
Compress;
end
else
begin
Move(PBuf^,HashBuffer[Index],Size);
Inc(Index,Size);
Size:= 0;
end;
end;
end;
procedure TDCP_tiger.Final(var Digest);
begin
if not fInitialized then
raise EDCP_hash.Create('Hash not initialized');
HashBuffer[Index]:= $01;
if Index>= 56 then
Compress;
Pint64(@HashBuffer[56])^:= Len;
Compress;
Move(CurrentHash,Digest,Sizeof(CurrentHash));
Burn;
end;
end.
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