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124 lines
4.4 KiB
ObjectPascal
124 lines
4.4 KiB
ObjectPascal
{******************************************************************************}
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{* DCPcrypt v2.0 written by David Barton (crypto@cityinthesky.co.uk) **********}
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{******************************************************************************}
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{* A binary compatible implementation of BLAKE3 *}
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{******************************************************************************}
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{* Copyright (C) 2020 Alexander Koblov (alexx2000@mail.ru) *}
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{* Permission is hereby granted, free of charge, to any person obtaining a *}
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{* copy of this software and associated documentation files (the "Software"), *}
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{* to deal in the Software without restriction, including without limitation *}
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{* the rights to use, copy, modify, merge, publish, distribute, sublicense, *}
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{* and/or sell copies of the Software, and to permit persons to whom the *}
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{* Software is furnished to do so, subject to the following conditions: *}
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{* *}
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{* The above copyright notice and this permission notice shall be included in *}
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{* all copies or substantial portions of the Software. *}
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{* *}
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{* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *}
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{* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *}
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{* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *}
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{* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *}
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{* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *}
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{* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *}
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{* DEALINGS IN THE SOFTWARE. *}
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{******************************************************************************}
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unit DCPblake3;
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{$mode delphi}
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interface
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uses
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Classes, SysUtils, CTypes, DCPcrypt2, DCPconst, DCblake3;
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type
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{ TDCP_blake3 }
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TDCP_blake3 = class(TDCP_hash)
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protected
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S: blake3_hasher;
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public
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class function GetId: integer; override;
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class function GetAlgorithm: string; override;
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class function GetHashSize: integer; override;
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class function SelfTest: boolean; override;
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procedure Init; override;
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procedure Burn; override;
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procedure Update(const Buffer; Size: longword); override;
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procedure Final(var Digest); override;
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end;
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implementation
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{ TDCP_blake3 }
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class function TDCP_blake3.GetId: integer;
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begin
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Result:= DCP_blake3;
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end;
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class function TDCP_blake3.GetAlgorithm: string;
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begin
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Result:= 'BLAKE3';
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end;
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class function TDCP_blake3.GetHashSize: integer;
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begin
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Result:= 256;
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end;
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class function TDCP_blake3.SelfTest: boolean;
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const
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Test1Out: array[0..31] of byte=
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($64, $37, $b3, $ac, $38, $46, $51, $33, $ff, $b6, $3b, $75, $27, $3a, $8d, $b5,
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$48, $c5, $58, $46, $5d, $79, $db, $03, $fd, $35, $9c, $6c, $d5, $bd, $9d, $85);
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Test2Out: array[0..31] of byte=
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($c1, $90, $12, $cc, $2a, $af, $0d, $c3, $d8, $e5, $c4, $5a, $1b, $79, $11, $4d,
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$2d, $f4, $2a, $bb, $2a, $41, $0b, $f5, $4b, $e0, $9e, $89, $1a, $f0, $6f, $f8 );
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var
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TestHash: TDCP_blake3;
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TestOut: array[0..31] of byte;
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begin
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dcpFillChar(TestOut, SizeOf(TestOut), 0);
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TestHash:= TDCP_blake3.Create(nil);
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TestHash.Init;
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TestHash.UpdateStr('abc');
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TestHash.Final(TestOut);
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Result:= boolean(CompareMem(@TestOut,@Test1Out,Sizeof(Test1Out)));
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TestHash.Init;
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TestHash.UpdateStr('abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq');
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TestHash.Final(TestOut);
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Result:= boolean(CompareMem(@TestOut,@Test2Out,Sizeof(Test2Out))) and Result;
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TestHash.Free;
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end;
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procedure TDCP_blake3.Init;
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begin
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blake3_hasher_init(@S);
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fInitialized:= true;
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end;
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procedure TDCP_blake3.Burn;
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begin
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fInitialized:= false;
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end;
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procedure TDCP_blake3.Update(const Buffer; Size: longword);
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begin
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blake3_hasher_update(@S, @Buffer, Size);
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end;
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procedure TDCP_blake3.Final(var Digest);
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var
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Hash: array[0..Pred(BLAKE3_OUT_LEN)] of cuint8;
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begin
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if not fInitialized then
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raise EDCP_hash.Create('Hash not initialized');
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blake3_hasher_finalize(@S, Hash, SizeOf(Hash));
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Move(Hash, Digest, Sizeof(Hash));
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Burn;
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end;
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end.
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