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zyj8119

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[½»Á÷] ¡¾×ªÌû¡¿Delphi ÖеÄMD5ʵÏÖ·½·¨¼°delphi2009ºÍdelphi2010ÖÐÓ÷¨

ÔÚDelphi×Ô´øµÄIndy¿Ø¼þÖÐÆäʵÊÇÌṩÁËMD2,MD4,MD5¶ÔÏóµÄ£¬ÎÒÃÇ¿ÉÒÔÖ±½ÓʹÓÃËüÃÇÀ´Íê³ÉMD5µÄÇ©ÃûËã·¨¡£¶ø²»ÐèÒªÔÙÈ¥ÕÒÆäËüµÄDLL»òÊÇPasÁË¡£
ÔÚUsesµ¥ÔªÖÐÒýÓà IdHashMessageDigest,IdGlobal, IdHash µ¥Ôª£¬ÔÙдÈçÏ´úÂë¼´¿ÉÒÔ´ïµ½MD5µÄʵÏÖ¡£
ʾÀý´úÂë
procedure TForm1.Button1Click(Sender: TObject);
var
MyMD5: TIdHashMessageDigest5;
Digest: T4x4LongWordRecord;
begin
MyMD5 := TIdHashMessageDigest5.Create;
Digest := MyMD5.HashValue('');
ShowMessage('32: ' + MyMD5.AsHex(Digest)); //ÏÔʾ32¸ö×Ö·û³¤¶ÈµÄMD5Ç©Ãû½á¹û
ShowMessage('16: ' + Copy(MyMD5.AsHex(Digest), 9, 16));   //ÏÔʾ16¸ö×Ö·û³¤¶ÈµÄMD5Ç©Ãû½á¹û
end;
˵Ã÷£º
MyMD5.HashValue º¯ÊýÖпÉÒÔÊÇÒ»¸ö×Ö·û´®»òÊÇÒ»¸öÁ÷¶ÔÏó,Ëü·µ»ØµÄ½á¹ûÀàÐÍΪ T4x4LongWordRecord µÄMD5Ç©Ãûºó½á¹û
MyMD5.AsHex º¯ÊýÊǽ«T4x4LongWordRecordµÄMd5Ç©Ãûת»»³ÉΪʮÁù½øÖƵÄMD5Ç©Ãû×Ö·û´®¡£

-----------------------------------------ÒÔÉϵķ½·¨ÊʺÏIndy9---------------------------------------------

ÒÔÏÂΪIndy10µÄÓ÷¨ÓÃdelphi2009»òdelphi2010ʱÒÔÉϾͻᱨ´íÁË.

type
TMD5 = class(TIdHashMessageDigest5);

function StrToMD5(S: String): String; overload;
function StrToMD5(S: String; L: integer): String; overload;

implementation

function StrToMD5(S: String): String;
var
Md5Encode: TMD5;
begin
Md5Encode:= TMD5.Create;
try
    //Result := Md5Encode.AsHex(Md5Encode.HashValue(S)); // Indy9µÄд·¨
    Result := Md5Encode.HashStringAsHex(S);    // Indy10ÖпÉÒÔÖ±½ÓHashStringAsHex
finally
    Md5Encode.Free;
end;
end;

function StrToMD5(S: String; L: integer): String;
begin
Result := Copy(StrToMD5(S), 5, L);
end;
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