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  1. uses Classes, SysUtils;
  2.  
  3. function leftrotate(x, c: Cardinal): Cardinal;
  4. begin
  5.   leftrotate := (x shl c) or (x shr (32-c));
  6. end;
  7.  
  8. const s: array[0..63] of Longint = (
  9. 	7, 12, 17, 22,  7, 12, 17, 22,  7, 12, 17, 22,  7, 12, 17, 22,
  10. 	5,  9, 14, 20,  5,  9, 14, 20,  5,  9, 14, 20,  5,  9, 14, 20,
  11. 	4, 11, 16, 23,  4, 11, 16, 23,  4, 11, 16, 23,  4, 11, 16, 23,
  12. 	6, 10, 15, 21,  6, 10, 15, 21,  6, 10, 15, 21,  6, 10, 15, 21 );
  13. K: array[0..63] of Longint = (
  14. 	$d76aa478, $e8c7b756, $242070db, $c1bdceee,
  15. 	$f57c0faf, $4787c62a, $a8304613, $fd469501,
  16. 	$698098d8, $8b44f7af, $ffff5bb1, $895cd7be,
  17. 	$6b901122, $fd987193, $a679438e, $49b40821,
  18. 	$f61e2562, $c040b340, $265e5a51, $e9b6c7aa,
  19. 	$d62f105d, $02441453, $d8a1e681, $e7d3fbc8,
  20. 	$21e1cde6, $c33707d6, $f4d50d87, $455a14ed,
  21. 	$a9e3e905, $fcefa3f8, $676f02d9, $8d2a4c8a,
  22. 	$fffa3942, $8771f681, $6d9d6122, $fde5380c,
  23. 	$a4beea44, $4bdecfa9, $f6bb4b60, $bebfbc70,
  24. 	$289b7ec6, $eaa127fa, $d4ef3085, $04881d05,
  25. 	$d9d4d039, $e6db99e5, $1fa27cf8, $c4ac5665,
  26. 	$f4292244, $432aff97, $ab9423a7, $fc93a039,
  27. 	$655b59c3, $8f0ccc92, $ffeff47d, $85845dd1,
  28. 	$6fa87e4f, $fe2ce6e0, $a3014314, $4e0811a1,
  29. 	$f7537e82, $bd3af235, $2ad7d2bb, $eb86d391 );
  30.  
  31. var a0,b0,c0,d0, a,b,c,d, f,g,dTemp: Longint;
  32.    Len: Integer;
  33.    Msg: array[0..63] of Char;
  34.    M: array[0..15] of Longint absolute Msg; //break chunk into sixteen 32-bit words M[j]
  35.    Str: String;
  36.    i: Integer;
  37.    ff: TFileStream;
  38.    wait: Char;
  39. begin
  40.   a0 := $67452301;
  41.   b0 := $efcdab89;
  42.   c0 := $98badcfe;
  43.   d0 := $10325476;
  44.  
  45.   Str := 'hello world';
  46.   Len := Length(Str);
  47.  
  48.   FillChar(Msg, 64, 0);
  49.  
  50.   for i:=1 to Len do Msg[i-1] := Str[i];
  51.  
  52. //append "1" bit to message
  53.   Msg[Len] := chr(128);
  54.  
  55. //append original length in bits mod (2 pow 64) to message
  56.   Msg[63-7] := chr(8*Len);
  57.  
  58. //Process each 512-bit chunk of message- 1 only have 1 chunk
  59.  
  60. //TEST dump
  61. //  ff := TFileStream.create('test.txt', fmCreate);
  62. //  ff.write(msg, 64);
  63. //  ff.free;
  64.  
  65. //Initialize hash value for this chunk:
  66.     A := a0;
  67.     B := b0;
  68.     C := c0;
  69.     D := d0;
  70.  
  71. //Main loop:
  72.     for i := 0 to 63 do begin
  73.  
  74.         if (i>=0) and (i<=15) then begin
  75.             F := (B and C) or ((not B) and D);
  76.             g := i;
  77.         end
  78.         else if (i>=16) and (i<=31) then begin
  79.             F := (D and B) or ((not D) and C);
  80.             g := (5*i + 1) mod 16;
  81.         end
  82.         else if (i>=32) and (i<=47) then begin
  83.             F := B xor C xor D;
  84.             g := (3*i + 5) mod 16;
  85.         end
  86.         else if (i>=48) and (i<=63) then begin
  87.             F := C xor (B or (not D));
  88.             g := (7*i) mod 16;
  89.         end;
  90.  
  91.         dTemp := D;
  92.         D := C;
  93.         C := B;
  94.         B := B + leftrotate((A + F + K[i] + M[g]), s[i]);
  95.         A := dTemp;
  96.     end;
  97.  
  98. //Add this chunk's hash to result so far:
  99.   a0 := a0 + A;
  100.   b0 := b0 + B;
  101.   c0 := c0 + C;
  102.   d0 := d0 + D;
  103.  
  104.   //This should give 5EB63BBBE01EEED093CB22BB8F5ACDC3
  105.   Writeln( IntToHex(a0,8) + IntToHex(b0,8) + IntToHex(c0,8)  +IntToHex(d0,8) );
  106.  
  107.   Readln(wait);
  108. end.
Success #stdin #stdout 0s 592KB
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Standard input is empty
stdout
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BB3BB65ED0EE1EE0BB22CB93C3CD5A8F
https://ideone.com/qdYQ6q
language:
Pascal (fpc 3.0.4)
created:
10 years ago
visibility:
public

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