Solved

MD5 Encryption?

Posted on 2004-09-16
11
3,264 Views
Last Modified: 2008-03-17
Hi,

I was wondering if there is a way to MD5 encrypt a string in delphi. Is there any component I could download? Or perhaps I'm missing something very obvious. I'm using Delphi 7.


Thanks,
- MelchaS
0
Comment
Question by:MelchaS
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
11 Comments
 
LVL 22

Expert Comment

by:Ferruccio Accalai
ID: 12072982
Go to www.nevrona.com\Indy and download Indy Components. There's TIdCoderMD5.
0
 

Author Comment

by:MelchaS
ID: 12073146
Err... What version? Because I have Indy, and there's no MD5 component...
0
 
LVL 22

Expert Comment

by:Ferruccio Accalai
ID: 12073178
in my D6 i've the 8.0.25 version. It's in Indy Misc Tab
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Expert Comment

by:ellessar
ID: 12073256
Try Cryptlib from

   http://www.cs.auckland.ac.nz/~pgut001/cryptlib/

The libraries and components support a range of security algorhythms including both two different MD5 format.

The libraries are cross-platform and cross language. The code is open source. There are Delphi specific interfaces/components for the libraries.
0
 

Author Comment

by:MelchaS
ID: 12073262
Do you know any other components for Delphi 7 ? I don't really want to get an older version of Indy/Delphi...
0
 

Author Comment

by:MelchaS
ID: 12073269
ellesar: Thanks, I'll check that out
0
 
LVL 4

Expert Comment

by:Evarest
ID: 12073280
Another excellent exncryption library is DCP. Get it at:

http://www.cityinthesky.co.uk

It includes two examples which explain how to use the components. Besides MD4-5, it includes numerous hashes and ciphers (including the Rijndael encryption standard).

Kind regards,
Evarest
0
 
LVL 7

Expert Comment

by:LRHGuy
ID: 12073962
These free components with source have an MD5 section:

http://sourceforge.net/projects/tplockbox/
0
 
LVL 5

Expert Comment

by:snehanshu
ID: 12074513
MelchaS,
  I found this code somewhere in my backup (We had used MD5 two years ago for an application).
  It uses TIdHashMessageDigest5 and I could compile it in Delphi 7 prof.
  Hope this helps,
...Shu

Here's the PAS:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdHash, IdHashMessageDigest, StdCtrls, Registry;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Memo1: TMemo;
    Button2: TButton;
    FlDlg: TOpenDialog;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
function rsReturnMD5(Value: TStream): PChar; stdcall;Overload;
Var
 Digest: T4x4LongWordRecord;
 S,
 S1: String;
 i: Integer;
begin

 SetLength(S, 16);
 with TIdHashMessageDigest5.Create do
 begin
   Digest := HashValue(Value);
   Move(Digest, S[1], 16);
   for i := 1 to Length(S) do begin
     S1 := S1 + Format('%02x', [Byte(S[i])]);
   end;
   Result := PChar(S1);
   Free;
 end;

end;


function rsReturnMD5(Value: PChar): PChar; stdcall;Overload;
Var
 Digest: T4x4LongWordRecord;
 S,
 S1: String;
 i: Integer;
begin

 SetLength(S, 16);
 with TIdHashMessageDigest5.Create do
 begin
   Digest := HashValue(Value);
   Move(Digest, S[1], 16);
   for i := 1 to Length(S) do begin
     S1 := S1 + Format('%02x', [Byte(S[i])]);
   end;
   Result := PChar(S1);
   Free;
 end;

end;

procedure TForm1.Button1Click(Sender: TObject);
Var
  V1: String;
  MyStream: TFileStream;
begin


  If FlDlg.Execute Then
  begin

    MyStream := TFileStream.Create(FlDlg.FileName, fmOpenRead);
    V1 := rsReturnMD5(MyStream);
    MyStream.Free;
    ShowMessage(V1);
  End
  Else
    ShowMessage('NotFound');


end;

procedure TForm1.Button2Click(Sender: TObject);
Var
  V1,V2,V3: String;
begin

  V1 := rsReturnMD5(PChar(edit1.Text));
  V2 := rsReturnMD5(PChar(edit2.Text));
  V3 := rsReturnMD5(PChar(Memo1.Text));
  ShowMessage(V1+ #13#10 +V2+ #13#10 +V3);
 
end;

procedure TForm1.Button3Click(Sender: TObject);
Var
  MyReg: TRegistry;
  RegType : TRegDataType;
  Buffer: array of byte;
  CBuffer: array [0..5] of byte;
//  Buffer: PByteArray;
  lBinaryDataSize, i: Integer;
  RegKey, RegValue, sValue, sData: String;

  procedure MyProc(Var MyVar; MySz:Integer);
  type
      TBytes = array[0..MaxInt - 1] of Byte;
//  Var
//  DBuffer: TBytes;
  begin

//    DBuffer := TBytes(MyVar);
    ShowMessage(IntToStr(TBytes(MyVar)[0]));
  End;

begin
  MyReg := TRegistry.Create;
  MyReg.RootKey := HKEY_CURRENT_USER;
  RegKey := 'Snehanshu';
  sValue := 'BinVal';
  RegValue := sValue;
        MyReg.OpenKey(RegKey, False);
        RegType := MyReg.GetDataType(RegValue);
        if (RegType = rdString) or (RegType = rdExpandString) then sData := MyReg.ReadString(sValue);
        if RegType = rdInteger then sData := IntToStr(MyReg.ReadInteger(sValue));
        if RegType = rdBinary then
        begin
            lBinaryDataSize := MyReg.GetDataSize(sValue);
//            Buffer := AllocMem(lBinaryDataSize);
            SetLength(Buffer, lBinaryDataSize);

//            MyReg.ReadBinaryData(RegValue, Buffer^, lBinaryDataSize);
            MyReg.ReadBinaryData(RegValue, Buffer[0], lBinaryDataSize);
            SValue := '';
            For i := 0 to lBinaryDataSize-1 Do
              SValue := SValue + IntToStr(Buffer[i])+',';
            ShowMessage(SValue);
       end;

       TButton.CreateParented()
       CBuffer[0] := 100;
       MyProc(CBuffer,6);


  MyReg.Free;
end;

end.
0
 
LVL 13

Accepted Solution

by:
BlackTigerX earned 50 total points
ID: 12075705
this is the one I use, it comes with example code, works really well

http://www.fichtner.net/delphi/md5.delphi.phtml

full Delphi source provided
0
 

Author Comment

by:MelchaS
ID: 12077442
BlackTigerX: Your component works best, thanks.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Press three keys together and trigger a function 3 67
Delphi Yen format 3 59
DBCtrlGrid, Delphi, Scroll 8 56
Delphi Seattle StructureView color 1 21
A lot of questions regard threads in Delphi.   One of the more specific questions is how to show progress of the thread.   Updating a progressbar from inside a thread is a mistake. A solution to this would be to send a synchronized message to the…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…

740 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question