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(Delphi ActiveX) Generate an RSA Key and Get as Base64 DERDemonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER. Note: This example requires Chilkat v11.0.0 or greater.
uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB; ... procedure TForm1.Button1Click(Sender: TObject); var success: Integer; rsa: TChilkatRsa; privKey: TPrivateKey; pubKey: TPublicKey; bChoosePkcs1: Integer; pubKeyBase64Der: WideString; privKeyPkcs1: WideString; privKeyPkcs8: WideString; begin success := 0; // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. rsa := TChilkatRsa.Create(Self); // Generate a 2048-bit key. privKey := TPrivateKey.Create(Self); success := rsa.GenKey(2048,privKey.ControlInterface); if (success = 0) then begin Memo1.Lines.Add(rsa.LastErrorText); Exit; end; // Get the public part of the key. pubKey := TPublicKey.Create(Self); privKey.ToPublicKey(pubKey.ControlInterface); // There are two possible formats for representing the RSA public key // in ASN.1 (DER). The possible formats are PKCS1 and PKCS8. // We can get either by setting bChoosePkcs1 to 1 or 0. bChoosePkcs1 := 1; pubKeyBase64Der := pubKey.GetEncoded(bChoosePkcs1,'base64'); Memo1.Lines.Add('Public Key Base64 DER:'); Memo1.Lines.Add(pubKeyBase64Der); // Get the private key as Base64 DER: // We can get PKCS1 or PKCS8, but with different methods: privKeyPkcs1 := privKey.GetPkcs1ENC('base64'); Memo1.Lines.Add('Private Key PKCS1 Base64 DER:'); Memo1.Lines.Add(privKeyPkcs1); privKeyPkcs8 := privKey.GetPkcs8ENC('base64'); Memo1.Lines.Add('Private Key PKCS8 Base64 DER:'); Memo1.Lines.Add(privKeyPkcs8); end; |
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