{******************************************************************************}
{* DCPcrypt v2.0 written by David Barton (crypto@cityinthesky.co.uk) **********}
{******************************************************************************}
{* A binary compatible implementation of SHA256 *******************************}
{******************************************************************************}
{* 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 DCPsha256;

interface
uses
  Classes, Sysutils, DCPcrypt2, DCPconst;

type
  TDCP_sha256= class(TDCP_hash)
  protected
    LenHi, LenLo: longword;
    Index: DWord;
    CurrentHash: array[0..7] 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 Final(var Digest); override;
    procedure Burn; override;
    procedure Update(const Buffer; Size: longword); override;
  end;

{******************************************************************************}
{******************************************************************************}
implementation
{$R-}{$Q-}

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;

procedure TDCP_sha256.Compress;
var
  a, b, c, d, e, f, g, h, t1, t2: DWord;
  W: array[0..63] of DWord;
  i: longword;
begin
  Index:= 0;
  a:= CurrentHash[0]; b:= CurrentHash[1]; c:= CurrentHash[2]; d:= CurrentHash[3];
  e:= CurrentHash[4]; f:= CurrentHash[5]; g:= CurrentHash[6]; h:= CurrentHash[7];
  Move(HashBuffer,W,Sizeof(HashBuffer));
  for i:= 0 to 15 do
    W[i]:= SwapDWord(W[i]);
  for i:= 16 to 63 do
    W[i]:= (((W[i-2] shr 17) or (W[i-2] shl 15)) xor ((W[i-2] shr 19) or (W[i-2] shl 13)) xor
      (W[i-2] shr 10)) + W[i-7] + (((W[i-15] shr 7) or (W[i-15] shl 25)) xor
      ((W[i-15] shr 18) or (W[i-15] shl 14)) xor (W[i-15] shr 3)) + W[i-16];
{
Non-optimised version
  for i:= 0 to 63 do
  begin
    t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) +
      ((e and f) xor (not e and g)) + K[i] + W[i];
    t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) +
      ((a and b) xor (a and c) xor (b and c));
    h:= g; g:= f; f:= e; e:= d + t1; d:= c; c:= b; b:= a; a:= t1 + t2;
  end;
}

  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $428a2f98 + W[0]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $71374491 + W[1]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $b5c0fbcf + W[2]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $e9b5dba5 + W[3]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $3956c25b + W[4]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $59f111f1 + W[5]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $923f82a4 + W[6]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $ab1c5ed5 + W[7]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $d807aa98 + W[8]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $12835b01 + W[9]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $243185be + W[10]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $550c7dc3 + W[11]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $72be5d74 + W[12]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $80deb1fe + W[13]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $9bdc06a7 + W[14]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $c19bf174 + W[15]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $e49b69c1 + W[16]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $efbe4786 + W[17]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $0fc19dc6 + W[18]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $240ca1cc + W[19]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $2de92c6f + W[20]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $4a7484aa + W[21]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $5cb0a9dc + W[22]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $76f988da + W[23]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $983e5152 + W[24]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $a831c66d + W[25]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $b00327c8 + W[26]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $bf597fc7 + W[27]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $c6e00bf3 + W[28]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $d5a79147 + W[29]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $06ca6351 + W[30]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $14292967 + W[31]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $27b70a85 + W[32]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $2e1b2138 + W[33]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $4d2c6dfc + W[34]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $53380d13 + W[35]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $650a7354 + W[36]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $766a0abb + W[37]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $81c2c92e + W[38]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $92722c85 + W[39]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $a2bfe8a1 + W[40]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $a81a664b + W[41]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $c24b8b70 + W[42]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $c76c51a3 + W[43]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $d192e819 + W[44]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $d6990624 + W[45]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;
  t1:= b + (((g shr 6) or (g shl 26)) xor ((g shr 11) or (g shl 21)) xor ((g shr 25) or (g shl 7))) + ((g and h) xor (not g and a)) + $f40e3585 + W[46]; t2:= (((c shr 2) or (c shl 30)) xor ((c shr 13) or (c shl 19)) xor ((c shr 22) xor (c shl 10))) + ((c and d) xor (c and e) xor (d and e)); b:= t1 + t2; f:= f + t1;
  t1:= a + (((f shr 6) or (f shl 26)) xor ((f shr 11) or (f shl 21)) xor ((f shr 25) or (f shl 7))) + ((f and g) xor (not f and h)) + $106aa070 + W[47]; t2:= (((b shr 2) or (b shl 30)) xor ((b shr 13) or (b shl 19)) xor ((b shr 22) xor (b shl 10))) + ((b and c) xor (b and d) xor (c and d)); a:= t1 + t2; e:= e + t1;
  t1:= h + (((e shr 6) or (e shl 26)) xor ((e shr 11) or (e shl 21)) xor ((e shr 25) or (e shl 7))) + ((e and f) xor (not e and g)) + $19a4c116 + W[48]; t2:= (((a shr 2) or (a shl 30)) xor ((a shr 13) or (a shl 19)) xor ((a shr 22) xor (a shl 10))) + ((a and b) xor (a and c) xor (b and c)); h:= t1 + t2; d:= d + t1;
  t1:= g + (((d shr 6) or (d shl 26)) xor ((d shr 11) or (d shl 21)) xor ((d shr 25) or (d shl 7))) + ((d and e) xor (not d and f)) + $1e376c08 + W[49]; t2:= (((h shr 2) or (h shl 30)) xor ((h shr 13) or (h shl 19)) xor ((h shr 22) xor (h shl 10))) + ((h and a) xor (h and b) xor (a and b)); g:= t1 + t2; c:= c + t1;
  t1:= f + (((c shr 6) or (c shl 26)) xor ((c shr 11) or (c shl 21)) xor ((c shr 25) or (c shl 7))) + ((c and d) xor (not c and e)) + $2748774c + W[50]; t2:= (((g shr 2) or (g shl 30)) xor ((g shr 13) or (g shl 19)) xor ((g shr 22) xor (g shl 10))) + ((g and h) xor (g and a) xor (h and a)); f:= t1 + t2; b:= b + t1;
  t1:= e + (((b shr 6) or (b shl 26)) xor ((b shr 11) or (b shl 21)) xor ((b shr 25) or (b shl 7))) + ((b and c) xor (not b and d)) + $34b0bcb5 + W[51]; t2:= (((f shr 2) or (f shl 30)) xor ((f shr 13) or (f shl 19)) xor ((f shr 22) xor (f shl 10))) + ((f and g) xor (f and h) xor (g and h)); e:= t1 + t2; a:= a + t1;
  t1:= d + (((a shr 6) or (a shl 26)) xor ((a shr 11) or (a shl 21)) xor ((a shr 25) or (a shl 7))) + ((a and b) xor (not a and c)) + $391c0cb3 + W[52]; t2:= (((e shr 2) or (e shl 30)) xor ((e shr 13) or (e shl 19)) xor ((e shr 22) xor (e shl 10))) + ((e and f) xor (e and g) xor (f and g)); d:= t1 + t2; h:= h + t1;
  t1:= c + (((h shr 6) or (h shl 26)) xor ((h shr 11) or (h shl 21)) xor ((h shr 25) or (h shl 7))) + ((h and a) xor (not h and b)) + $4ed8aa4a + W[53]; t2:= (((d shr 2) or (d shl 30)) xor ((d shr 13) or (d shl 19)) xor ((d shr 22) xor (d shl 10))) + ((d and e) xor (d and f) xor (e and f)); c:= t1 + t2; g:= g + t1;