(Delphi DLL) Use Base64 RSA Key to Encrypt

Loads a Base64 RSA key and uses it to encrypt a string, returning the result in base64.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
pubkey: HCkPublicKey;
success: Boolean;
rsa: HCkRsa;
encryptedStr: PWideChar;

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

pubkey := CkPublicKey_Create();

success := CkPublicKey_LoadBase64(pubkey,'MIICdgIBADA ... A9PXLk+j5A==');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkPublicKey__lastErrorText(pubkey));
    Exit;
  end;

rsa := CkRsa_Create();

success := CkRsa_ImportPublicKeyObj(rsa,pubkey);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRsa__lastErrorText(rsa));
    Exit;
  end;

CkRsa_putEncodingMode(rsa,'base64');

encryptedStr := CkRsa__encryptStringENC(rsa,'12345678',False);

Memo1.Lines.Add(encryptedStr);

CkPublicKey_Dispose(pubkey);
CkRsa_Dispose(rsa);

end;