DSA Generate Key

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Download Chilkat DSA ActiveX

uses
    Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
    Dialogs, StdCtrls,
    CHILKATDSALib_TLB,
    OleCtrls;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
dsa: TChilkatDsa;
pemStr: String;
xmlStr: String;
bPublicOnly: Integer;

begin


dsa := TChilkatDsa.Create(Self);

success := dsa.UnlockComponent('Anything for 30-day trial');
if (success <> 1) then
  begin
    ShowMessage(dsa.LastErrorText);
    Exit;
  end;

//  Call GenKey to generate a new DSA key.
//  The number of bits should be at least 1024 and a multiple
//  of 64.   Typical values are either 1024 or 2048.
//  DSA key generation is compute intensive and may take
//  a short while to complete.
success := dsa.GenKey(2048);
if (success <> 1) then
  begin
    ShowMessage(dsa.LastErrorText);
    Exit;
  end;

//  Extract the private and public parts to PEM or DER format
//  and save to files...

//  First for the public key...
//  The public key never needs to be encrypted.

//  Save the public key in PEM format:
pemStr := dsa.ToPublicPem();
//  This example will not check the return value of SaveText...
success := dsa.SaveText(pemStr,'dsa_pub.pem');

//  Save the public key in DER format:
success := dsa.ToPublicDerFile('dsa_pub.der');

bPublicOnly := 1;
//  Save to XML
xmlStr := dsa.ToXml(bPublicOnly);
success := dsa.SaveText(xmlStr,'dsa_pub.xml');

//  ------------------------------------
//  Now for the private key....
//  ------------------------------------

//  Unencrypted PEM:
pemStr := dsa.ToPem();
success := dsa.SaveText(pemStr,'dsa_priv.pem');

//  Encrypted PEM:
pemStr := dsa.ToEncryptedPem('myPassword');
success := dsa.SaveText(pemStr,'dsa_privEncrypted.pem');

//  DER:
success := dsa.ToDerFile('dsa_priv.der');

//  XML:
bPublicOnly := 0;
xmlStr := dsa.ToXml(bPublicOnly);
success := dsa.SaveText(xmlStr,'dsa_priv.xml');

ShowMessage('Finished!');
end;