diff -r 475c0f2f9d17 -r 30f2d1037d5d hedgewars/uSHA.pas
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hedgewars/uSHA.pas	Mon Aug 22 13:35:41 2005 +0000
@@ -0,0 +1,163 @@
+(*
+ * Hedgewars, a worms-like game
+ * Copyright (c) 2004, 2005 Andrey Korotaev <unC0Rr@gmail.com>
+ *
+ * Distributed under the terms of the BSD-modified licence:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * with 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:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *)
+
+unit uSHA;
+interface
+
+type TSHA1Context = packed record
+                    H: array[0..4] of LongWord;
+                    Length, CurrLength: Int64;
+                    Buf: array[0..63] of byte;
+                    end;
+     TSHA1Digest = record
+                   case byte of
+                        0: (LongWords: array[0.. 4] of LongWord);
+                        1: (    Words: array[0.. 9] of     Word);
+                        2: (    Bytes: array[0..19] of     Byte)
+                   end;
+
+procedure SHA1Init(var Context: TSHA1Context);
+procedure SHA1Update(var Context: TSHA1Context; Buf: Pointer; Length: LongWord);
+function  SHA1Final(Context: TSHA1Context): TSHA1Digest;
+
+implementation
+
+function _bswap(X: LongWord): LongWord; assembler;
+asm
+  bswap eax
+end;
+
+function rol(x: LongWord; y: Byte): LongWord; assembler;
+asm
+  mov   cl,dl
+  rol   eax,cl
+end;
+
+function Ft(t, b, c, d: LongWord): LongWord;
+begin
+case t of
+      0..19: Result := (b and c) or ((not b) and d);
+     20..39: Result :=  b xor c xor d;
+     40..59: Result := (b and c) or (b and d) or (c and d);
+     else    Result :=  b xor c xor d;
+  end;
+end;
+
+function Kt(t: Byte): LongWord;
+begin
+  case t of
+     0..19: Result := $5A827999;
+    20..39: Result := $6ED9EBA1;
+    40..59: Result := $8F1BBCDC;
+  else
+    Result := $CA62C1D6
+  end;
+end;
+
+
+procedure SHA1Hash(var Context: TSHA1Context);
+var S: array[0..4 ] of LongWord;
+    W: array[0..79] of LongWord;
+    i, t: LongWord;
+begin
+move(Context.H, S, sizeof(S));
+for i:= 0 to 15 do
+    W[i]:= _bswap(PLongWord(LongWord(@Context.Buf)+i*4)^);
+for i := 16 to 79 do
+    W[i] := rol(W[i - 3] xor W[i - 8] xor W[i - 14] xor W[i - 16], 1);
+for i := 0 to 79 do
+    begin
+    t:= rol(S[0], 5) + Ft(i, S[1], S[2], S[3]) + S[4] + W[i] + Kt(i);
+    S[4]:= S[3];
+    S[3]:= S[2];
+    S[2]:= rol(S[1], 30);
+    S[1]:= S[0];
+    S[0]:= t
+    end;
+for i := 0 to 4 do
+    Context.H[i]:= Context.H[i] + S[i]
+end;
+
+procedure SHA1Init(var Context: TSHA1Context);
+begin
+  with Context do
+       begin
+       Length    := 0;
+       CurrLength:= 0;
+       H[0]:= $67452301;
+       H[1]:= $EFCDAB89;
+       H[2]:= $98BADCFE;
+       H[3]:= $10325476;
+       H[4]:= $C3D2E1F0
+  end
+end;
+
+procedure SHA1Update(var Context: TSHA1Context; Buf: Pointer; Length: LongWord);
+var i: integer;
+begin
+for i:= 1 to Length do
+    begin
+    Context.Buf[Context.CurrLength]:= PByte(Buf)^;
+    inc(Context.CurrLength);
+    inc(LongWord(Buf));
+    if Context.CurrLength=64 then
+       begin
+       SHA1Hash(Context);
+       inc(Context.Length, 512);
+       Context.CurrLength:=0
+       end
+    end
+end;
+
+function  SHA1Final(Context: TSHA1Context): TSHA1Digest;
+var i: LongWord;
+begin
+Context.Length:= Context.Length + Context.CurrLength shl 3;
+Context.Buf[Context.CurrLength]:= $80;
+inc(Context.CurrLength);
+if Context.CurrLength>56 then
+   begin
+   FillChar(Context.Buf[Context.CurrLength],64-Context.CurrLength,0);
+   Context.CurrLength:= 64;
+   SHA1Hash(Context);
+   Context.CurrLength:=0
+   end;
+FillChar(Context.Buf[Context.CurrLength],56-Context.CurrLength,0);
+for i:= 56 to 63 do
+    Context.Buf[i] := (Context.Length shr ((63 - i) * 8)) and $FF;
+SHA1Hash(Context);
+move(Context.H, Result, sizeof(TSHA1Digest));
+FillChar(Context, sizeof(Context), 0)
+end;
+
+end.