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function myStrToHex(s:string):string; //×Ö´®×ª16½øÖÆ
var
TmpStr:string;
i:integer;
begin
TmpStr:='';
for i:=1 to Length(s)do
TmpStr:=TmpStr+IntToHex(ord(s[i]),2);
Result:=TmpStr;
end;
function myHexToStr(S:string):string; //16½øÖÆת×Ö´®
var
HexS,TmpStr:string;
i:Integer;
a:Byte;
begin
HexS:=s;
if Length(HexS) mod 2=1 then
HexS:=HexS+'0';
TmpStr:='';
for i:=1 to(Length(HexS)div 2)do
begin
a:=StrToInt('$'+HexS[2*i-1]+HexS[2*i]);
TmpStr:=TmpStr+Chr(a);
end;
Result:=TmpStr;
end;
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{Á½¸öº¯ÊýµÄ²ÎÊýÏàͬ£¬sΪҪ¼ÓÃÜ¡¢½âÃܵÄ×Ö´®£»sKeyΪÃܳ×}
function EncryptStr(const s:string;sKey:string):string; //¼ÓÃÜ
var
i,j:Integer;
HexS,HexsKey,MidS,TmpStr:string;
a,b,c:byte;
begin
HexS:=myStrToHex(s);
HexsKey:=myStrToHex(sKey);
MidS:=HexS;
for i:=1 to(Length(HexsKey)div 2)do
begin
if i<>1 then MidS:=TmpStr;
TmpStr:=''; //ÏÂÃæÒªÓõ½TmpStr£¬ËùÒÔÒªÇå¿Õ
for j:=1 to (Length(MidS)div 2)do
begin
a:=StrToInt('$'+midS[2*j-1]+midS[2*j]);
b:=StrToInt('$'+HexsKey[2*i-1]+HexsKey[2*i]);
c:=a xor b;
tmpstr:=TmpStr+myStrToHex(Chr(c));
end;
end;
Result:=TmpStr;
end;
function DecryptStr(const s:string;sKey:string):string; //½âÃÜ
var
i,j:Integer;
HexS,HexsKey,MidS,TmpStr:string;
a,b,c:Byte;
begin
HexS:=s;
if Length(HexS)mod 2=1 then //¼ì²éÊÇ·ñΪ×Ö·û´®
begin
ShowMessage('ÃÜÎÄ´íÎó£¡');
Exit;
end;
HexsKey:=myStrToHex(sKey);
TmpStr:=HexS;
MidS:=HexS;
for i:=(length(HexsKey) div 2) downto 1 do
begin
if i<>(length(HexsKey) div 2)then
MidS:=TmpStr;
TmpStr:=''; //ÏÂÃæÒªÓõ½TmpStr£¬ËùÒÔÒªÇå¿Õ
for j:=1 to(length(MidS) div 2)do
begin
a:=StrToInt('$'+MidS[2*j-1]+MidS[2*j]);
b:=StrToInt('$'+HexsKey[2*i-1]+HexsKey[2*i]);