mirror of
https://github.com/moparisthebest/Simba
synced 2024-11-25 10:42:20 -05:00
238 lines
8.6 KiB
ObjectPascal
238 lines
8.6 KiB
ObjectPascal
{******************************************************************************}
|
|
{* DCPcrypt v2.0 written by David Barton (crypto@cityinthesky.co.uk) **********}
|
|
{******************************************************************************}
|
|
{* A binary compatible implementation of MD4 **********************************}
|
|
{******************************************************************************}
|
|
{* 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 DCPmd4;
|
|
|
|
{$MODE Delphi}
|
|
|
|
interface
|
|
uses
|
|
Classes, Sysutils, DCPcrypt2, DCPconst;
|
|
|
|
type
|
|
TDCP_md4= class(TDCP_hash)
|
|
protected
|
|
LenHi, LenLo: longword;
|
|
Index: DWord;
|
|
CurrentHash: array[0..3] of DWord;
|
|
HashBuffer: array[0..63] of byte;
|
|
procedure Compress;
|
|
public
|
|
class function GetId: integer; override;
|
|
class function GetAlgorithm: string; override;
|
|
class function GetHashSize: integer; override;
|
|
class function SelfTest: boolean; override;
|
|
procedure Init; override;
|
|
procedure Burn; override;
|
|
procedure Update(const Buffer; Size: longword); override;
|
|
procedure Final(var Digest); override;
|
|
end;
|
|
|
|
|
|
|
|
{******************************************************************************}
|
|
{******************************************************************************}
|
|
implementation
|
|
{$R-}{$Q-}
|
|
|
|
function LRot32(a, b: longword): longword;
|
|
begin
|
|
Result:= (a shl b) or (a shr (32-b));
|
|
end;
|
|
|
|
procedure TDCP_md4.Compress;
|
|
var
|
|
Data: array[0..15] of dword;
|
|
A, B, C, D: dword;
|
|
begin
|
|
dcpFillChar(Data, SizeOf(Data), 0);
|
|
Move(HashBuffer,Data,Sizeof(Data));
|
|
A:= CurrentHash[0];
|
|
B:= CurrentHash[1];
|
|
C:= CurrentHash[2];
|
|
D:= CurrentHash[3];
|
|
|
|
A:= LRot32(A + (D xor (B and (C xor D))) + Data[ 0],3);
|
|
D:= LRot32(D + (C xor (A and (B xor C))) + Data[ 1],7);
|
|
C:= LRot32(C + (B xor (D and (A xor B))) + Data[ 2],11);
|
|
B:= LRot32(B + (A xor (C and (D xor A))) + Data[ 3],19);
|
|
A:= LRot32(A + (D xor (B and (C xor D))) + Data[ 4],3);
|
|
D:= LRot32(D + (C xor (A and (B xor C))) + Data[ 5],7);
|
|
C:= LRot32(C + (B xor (D and (A xor B))) + Data[ 6],11);
|
|
B:= LRot32(B + (A xor (C and (D xor A))) + Data[ 7],19);
|
|
A:= LRot32(A + (D xor (B and (C xor D))) + Data[ 8],3);
|
|
D:= LRot32(D + (C xor (A and (B xor C))) + Data[ 9],7);
|
|
C:= LRot32(C + (B xor (D and (A xor B))) + Data[10],11);
|
|
B:= LRot32(B + (A xor (C and (D xor A))) + Data[11],19);
|
|
A:= LRot32(A + (D xor (B and (C xor D))) + Data[12],3);
|
|
D:= LRot32(D + (C xor (A and (B xor C))) + Data[13],7);
|
|
C:= LRot32(C + (B xor (D and (A xor B))) + Data[14],11);
|
|
B:= LRot32(B + (A xor (C and (D xor A))) + Data[15],19);
|
|
|
|
A:= LRot32(A + ((B and C) or (B and D) or (C and D)) + Data[ 0] + $5a827999,3);
|
|
D:= LRot32(D + ((A and B) or (A and C) or (B and C)) + Data[ 4] + $5a827999,5);
|
|
C:= LRot32(C + ((D and A) or (D and B) or (A and B)) + Data[ 8] + $5a827999,9);
|
|
B:= LRot32(B + ((C and D) or (C and A) or (D and A)) + Data[12] + $5a827999,13);
|
|
A:= LRot32(A + ((B and C) or (B and D) or (C and D)) + Data[ 1] + $5a827999,3);
|
|
D:= LRot32(D + ((A and B) or (A and C) or (B and C)) + Data[ 5] + $5a827999,5);
|
|
C:= LRot32(C + ((D and A) or (D and B) or (A and B)) + Data[ 9] + $5a827999,9);
|
|
B:= LRot32(B + ((C and D) or (C and A) or (D and A)) + Data[13] + $5a827999,13);
|
|
A:= LRot32(A + ((B and C) or (B and D) or (C and D)) + Data[ 2] + $5a827999,3);
|
|
D:= LRot32(D + ((A and B) or (A and C) or (B and C)) + Data[ 6] + $5a827999,5);
|
|
C:= LRot32(C + ((D and A) or (D and B) or (A and B)) + Data[10] + $5a827999,9);
|
|
B:= LRot32(B + ((C and D) or (C and A) or (D and A)) + Data[14] + $5a827999,13);
|
|
A:= LRot32(A + ((B and C) or (B and D) or (C and D)) + Data[ 3] + $5a827999,3);
|
|
D:= LRot32(D + ((A and B) or (A and C) or (B and C)) + Data[ 7] + $5a827999,5);
|
|
C:= LRot32(C + ((D and A) or (D and B) or (A and B)) + Data[11] + $5a827999,9);
|
|
B:= LRot32(B + ((C and D) or (C and A) or (D and A)) + Data[15] + $5a827999,13);
|
|
|
|
A:= LRot32(A + (B xor C xor D) + Data[ 0] + $6ed9eba1,3);
|
|
D:= LRot32(D + (A xor B xor C) + Data[ 8] + $6ed9eba1,9);
|
|
C:= LRot32(C + (D xor A xor B) + Data[ 4] + $6ed9eba1,11);
|
|
B:= LRot32(B + (C xor D xor A) + Data[12] + $6ed9eba1,15);
|
|
A:= LRot32(A + (B xor C xor D) + Data[ 2] + $6ed9eba1,3);
|
|
D:= LRot32(D + (A xor B xor C) + Data[10] + $6ed9eba1,9);
|
|
C:= LRot32(C + (D xor A xor B) + Data[ 6] + $6ed9eba1,11);
|
|
B:= LRot32(B + (C xor D xor A) + Data[14] + $6ed9eba1,15);
|
|
A:= LRot32(A + (B xor C xor D) + Data[ 1] + $6ed9eba1,3);
|
|
D:= LRot32(D + (A xor B xor C) + Data[ 9] + $6ed9eba1,9);
|
|
C:= LRot32(C + (D xor A xor B) + Data[ 5] + $6ed9eba1,11);
|
|
B:= LRot32(B + (C xor D xor A) + Data[13] + $6ed9eba1,15);
|
|
A:= LRot32(A + (B xor C xor D) + Data[ 3] + $6ed9eba1,3);
|
|
D:= LRot32(D + (A xor B xor C) + Data[11] + $6ed9eba1,9);
|
|
C:= LRot32(C + (D xor A xor B) + Data[ 7] + $6ed9eba1,11);
|
|
B:= LRot32(B + (C xor D xor A) + Data[15] + $6ed9eba1,15);
|
|
|
|
Inc(CurrentHash[0],A);
|
|
Inc(CurrentHash[1],B);
|
|
Inc(CurrentHash[2],C);
|
|
Inc(CurrentHash[3],D);
|
|
Index:= 0;
|
|
FillChar(HashBuffer,Sizeof(HashBuffer),0);
|
|
end;
|
|
|
|
class function TDCP_md4.GetHashSize: integer;
|
|
begin
|
|
Result:= 128;
|
|
end;
|
|
|
|
class function TDCP_md4.GetId: integer;
|
|
begin
|
|
Result:= DCP_md4;
|
|
end;
|
|
|
|
class function TDCP_md4.GetAlgorithm: string;
|
|
begin
|
|
Result:= 'MD4';
|
|
end;
|
|
|
|
class function TDCP_md4.SelfTest: boolean;
|
|
const
|
|
Test1Out: array[0..15] of byte=
|
|
($a4,$48,$01,$7a,$af,$21,$d8,$52,$5f,$c1,$0a,$e8,$7a,$a6,$72,$9d);
|
|
Test2Out: array[0..15] of byte=
|
|
($d7,$9e,$1c,$30,$8a,$a5,$bb,$cd,$ee,$a8,$ed,$63,$df,$41,$2d,$a9);
|
|
var
|
|
TestHash: TDCP_md4;
|
|
TestOut: array[0..19] of byte;
|
|
begin
|
|
dcpFillChar(TestOut, SizeOf(TestOut), 0);
|
|
TestHash:= TDCP_md4.Create(nil);
|
|
TestHash.Init;
|
|
TestHash.UpdateStr('abc');
|
|
TestHash.Final(TestOut);
|
|
Result:= CompareMem(@TestOut,@Test1Out,Sizeof(Test1Out));
|
|
TestHash.Init;
|
|
TestHash.UpdateStr('abcdefghijklmnopqrstuvwxyz');
|
|
TestHash.Final(TestOut);
|
|
Result:= CompareMem(@TestOut,@Test2Out,Sizeof(Test2Out)) and Result;
|
|
TestHash.Free;
|
|
end;
|
|
|
|
procedure TDCP_md4.Init;
|
|
begin
|
|
Burn;
|
|
CurrentHash[0]:= $67452301;
|
|
CurrentHash[1]:= $efcdab89;
|
|
CurrentHash[2]:= $98badcfe;
|
|
CurrentHash[3]:= $10325476;
|
|
fInitialized:= true;
|
|
end;
|
|
|
|
procedure TDCP_md4.Burn;
|
|
begin
|
|
LenHi:= 0; LenLo:= 0;
|
|
Index:= 0;
|
|
FillChar(HashBuffer,Sizeof(HashBuffer),0);
|
|
FillChar(CurrentHash,Sizeof(CurrentHash),0);
|
|
fInitialized:= false;
|
|
end;
|
|
|
|
procedure TDCP_md4.Update(const Buffer; Size: longword);
|
|
var
|
|
PBuf: ^byte;
|
|
begin
|
|
if not fInitialized then
|
|
raise EDCP_hash.Create('Hash not initialized');
|
|
|
|
Inc(LenHi,Size shr 29);
|
|
Inc(LenLo,Size*8);
|
|
if LenLo< (Size*8) then
|
|
Inc(LenHi);
|
|
|
|
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_md4.Final(var Digest);
|
|
begin
|
|
if not fInitialized then
|
|
raise EDCP_hash.Create('Hash not initialized');
|
|
HashBuffer[Index]:= $80;
|
|
if Index>= 56 then
|
|
Compress;
|
|
PDWord(@HashBuffer[56])^:= LenLo;
|
|
PDWord(@HashBuffer[60])^:= LenHi;
|
|
Compress;
|
|
Move(CurrentHash,Digest,Sizeof(CurrentHash));
|
|
Burn;
|
|
end;
|
|
|
|
end.
|