Delphi进行数据加密,在数据库方面经常要使用到。从网上转载过来的,以后会经常会用到。
一、MD5加密算法
在C#/.Net里提供了MD5加密的类库。在Delphi中没有。只能自己建一个新的单位,将网上别人写的MD5加密函数拿来用。
View Code调用方法:
var
md5: TMD5Digest; //MD5Unit.pas
passwordSource:string;
passwordDestinate:string;
begin
passwordSource:='testStringForMD5';
MD5String(passwordSource, @md5);
passwordDestinate:= LowerCase(MD5DigestToStr(md5));
ShowMessage(passwordDestinate);
end;
调用方法二:
uses MD5Unit,IdHashMessageDigest,IdHash;
procedure TForm1.btn1Click(Sender: TObject);
var
MyMD5: TIdHashMessageDigest5;//IdHashMessageDigest.pas
Digest: T4x4LongWordRecord; //IdHash.pas
passwordSource:string;
passwordDestinate32:string;
passwordDestinate16:string;
begin
passwordSource:='testStringForMD5';
MyMD5 := TIdHashMessageDigest5.Create;
Digest := MyMD5.HashValue(passwordSource);
passwordDestinate32:=LowerCase(MyMD5.AsHex(Digest)); //32个字符长度的MD5签名结果
passwordDestinate16:=Copy(passwordDestinate32, 9, 16);//16个字符长度的MD5签名结果
ShowMessage('32: ' +passwordDestinate32+#13#10+'16: ' + passwordDestinate16);
MyMD5.Free;
end;
end.
二、DES加密算法
DES的加密、解密封库单元
View Code调用方法,加密:
var PlaintextStr:string; begin PlaintextStr:='加密测试!'; PublicCiphertextStr:=EncryStrHex(PlaintextStr, '11111111');//StandardDES.pas showmessage(PublicCiphertextStr); end;
调用方法,解密:
var PlaintextStr:string; begin PlaintextStr:=DecryStrHex(PublicCiphertextStr, '11111111');//StandardDES.pas showmessage(PlaintextStr); end;
转截自:http://www.cnblogs.com/edisonfeng/archive/2011/07/22/2054520.html
