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| -- 作者：wangxinxin -- 發(fā)布時間：2010-12-14 11:35:33 -- MD5程序（Delphi） /*** Source Code of MD5 ***/ y}aKL(AaU / written BY upfeed[FCG] / -!O v{GHr0 /**************************/ ( AI gW ~;)H |R5kV 下面的函數(shù)是計算核心，至于分組和填充部分就略去了。 o paRk.p ==================================================== $X\\ deJ1Hi 參數(shù)說明： =&8Cg AA,BB,CC,DD是摘要信息，一般初始化為 1iLr K A AA := $67452301; 5EX Ghc\' BB := $EFCDAB89; "A9qC*6[ CC := $98BADCFE; A WS[e$Mt2 DD := $10325476; 5 Z]]xR[ MSGs是一個長64的LongWord數(shù)組，保存的就是要摘要的信息 Crg@05Z ==================================================== yiO/0nMp procedure TMainForm.MD5(var AA, BB, CC, DD: LongWord; MSGs: array of LongWord); i:/Ws1=q var *!5X!\\e_ A, B, C, D: LongWord; Fo.p}j+> T: array[1..64] of LongWord; +"?O2PX i: integer; K| w\\KX0 3\'jH,17lWV //沒有循環(huán)左移的位運算，自己寫一個 (8In f_ 59 function ROL(r: LongWord; bit: byte): LongWord; !+o`,KTYp var wAA9M4 ii: byte; o=)[ "V begin . UaLP for ii:=1 to bit do XF Cwa if r and $80000000 = $80000000 then T*1`MIkv r := (r shl 1) or $01 7=`_UqCV else W*WSjuFr2 r := (r shl 1); vxZ :l Result := r; |T+YC[T#v end; X aw&41K Oh W o //四輪運算中的函數(shù)定義，也可以自行定義的 [,TK" procedure FF(var a: LongWord; b, c, d: LongWord; k, s, i: byte); N _o|2 begin j 21>\\K!p a := b + ROL((a + ((b and c) or (not b and d)) + MSGs[k] + T), s); f7v|N) end; VlFhfOR6t procedure GG(var a: LongWord; b, c, d: LongWord; k, s, i: byte); ;y]BXW&l& begin )\\m%&EXG{ a := b + ROL((a + ((b and d) or (c and not d)) + MSGs[k] + T), s); ,7os3~Mk9 end; |_u|Td (n procedure HH(var a: LongWord; b, c, d: LongWord; k, s, i: byte); #McX begin *}RV)0m if a := b + ROL((a + (b xor c xor d) + MSGs[k] + T), s); ?656P=b) end; *T-v^ndJh procedure II(var a: LongWord; b, c, d: LongWord; k, s, i: byte); i:n1Di1~E begin z|v/h UrD a := b + ROL((a + (c xor (b or not d)) + MSGs[k] + T), s); "VgPaz# end; gxCl=\\ % ou@Y` begin %mNd9 ]< fillchar(T, sizeof(T), 0); bF c % 19*D*dkBR //常數(shù)數(shù)組的初始化，通常是這種形式，當(dāng)然可以自己做手腳的 cL^r^kL(" for i:=1 to 64 do fDrjR6xV T := Trunc(4294967296*abs(sin(i))); c^8csQ fG ( P\\oLr9 A := AA; B := BB; C := CC; D := DD; qs3V2lvYw{ //第一輪 O Y,iz FF(A, B, C, D, 0, 7, 1); FF(D, A, B, C, 1, 12, 2); FF(C, D, A, B, 2, 17, 3); FF(B, C, D, A, 3, 22, 4); S&{#sl#e FF(A, B, C, D, 4, 7, 5); FF(D, A, B, C, 5, 12, 6); FF(C, D, A, B, 6, 17, 7); FF(B, C, D, A, 7, 22, 8); *DuP ~8 FF(A, B, C, D, 8, 7, 9); FF(D, A, B, C, 9, 12,10); FF(C, D, A, B, 10,17,11); FF(B, C, D, A, 11,22,12); \' ;KZ.D FF(A, B, C, D, 12,7,13); FF(D, A, B, C, 13,12,14); FF(C, D, A, B, 14,17,15); FF(B, C, D, A, 15,22,16); gh<2i\\})\' VL8yL`~zc. //第二輪 `Oe"s_O# GG(A, B, C, D, 1, 5,17); GG(D, A, B, C, 6, 9,18); GG(C, D, A, B, 11,14,19); GG(B, C, D, A, 0, 20,20); >{ .|Ng4K GG(A, B, C, D, 5, 5,21); GG(D, A, B, C, 10, 9,22); GG(C, D, A, B, 15,14,23); GG(B, C, D, A, 4, 20,24); !b?`TUt GG(A, B, C, D, 9, 5,25); GG(D, A, B, C, 14, 9,26); GG(C, D, A, B, 3, 14,27); GG(B, C, D, A, 8, 20,28); A9kn\\U92 GG(A, B, C, D, 13,5,29); GG(D, A, B, C, 2, 9,30); GG(C, D, A, B, 7, 14,31); GG(B, C, D, A, 12,20,32); v 0D@`C P*3PDa@ //第三輪 yBnUz" HH(A, B, C, D, 5, 4,33); HH(D, A, B, C, 8, 11,34); HH(C, D, A, B, 11,16,35); HH(B, C, D, A, 14,23,36); iE* Y@E5x0 HH(A, B, C, D, 1, 4,37); HH(D, A, B, C, 4, 11,38); HH(C, D, A, B, 7, 16,39); HH(B, C, D, A, 10,23,40); A*TO0L HH(A, B, C, D, 13,4,41); HH(D, A, B, C, 0, 11,42); HH(C, D, A, B, 3, 16,43); HH(B, C, D, A, 6, 23,44); @0fiui_ HH(A, B, C, D, 9, 4,45); HH(D, A, B, C, 12,11,46); HH(C, D, A, B, 15,16,47); HH(B, C, D, A, 2, 23,48); Vy@ 0Got5= 3\\H0Nkubts //第四輪 Y%#r&de II(A, B, C, D, 0, 6,49); II(D, A, B, C, 7, 10,50); II(C, D, A, B, 14,15,51); II(B, C, D, A, 5, 21,52); >/9on. II(A, B, C, D, 12,6,53); II(D, A, B, C, 3, 10,54); II(C, D, A, B, 10,15,55); II(B, C, D, A, 1, 21,56); \\><v1x>; II(A, B, C, D, 8, 6,57); II(D, A, B, C, 15,10,58); II(C, D, A, B, 6, 15,59); II(B, C, D, A, 13,21,60); I@l }%L II(A, B, C, D, 4, 6,61); II(D, A, B, C, 11,10,62); II(C, D, A, B, 2, 15,63); II(B, C, D, A, 9, 21,64); (i>bGmiN 1MxO ((k AA := A + AA; \'I5~<"E BB := B + BB; 3;f}w g CC := C + CC; : i/uRR DD := D + DD; 6 u}c543 end; |