Delphi DLL

Generate new DSA Key from OpenSSL Parameters File

See more DSA Examples

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Dsa;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
dsa: HCkDsa;
pemStr: PWideChar;
xmlStr: PWideChar;
bPublicOnly: Boolean;

begin
success := False;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

dsa := CkDsa_Create();

success := CkDsa_GenKeyFromParamsDerFile(dsa,'dsaparam.der');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkDsa__lastErrorText(dsa));
    Exit;
  end;

// To generate a key from PEM, call GenKeyFromParamsPem 
// (for an in-memory PEM string) or GenKeyFromParamsFilePem
// for a PEM file.

// The public and private keys may now be exported to PEM, DER,
// and XML formatted files.

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

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

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

bPublicOnly := True;
// Save to XML
xmlStr := CkDsa__toXml(dsa,bPublicOnly);
success := CkDsa_SaveText(dsa,pemStr,'dsa_pub.xml');

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

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

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

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

// XML:
bPublicOnly := False;
xmlStr := CkDsa__toXml(dsa,bPublicOnly);
success := CkDsa_SaveText(dsa,pemStr,'dsa_priv.xml');

Memo1.Lines.Add('Finished!');

CkDsa_Dispose(dsa);

end;