(Delphi DLL) REST Basic Auth with Secure Strings

Demonstrates how to do REST Basic authentication using secure strings.

This example requires Chilkat v9.5.0.71 or greater.

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, SecureString, Rest, JsonObject, Crypt2;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
json: HCkJsonObject;
crypt: HCkCrypt2;
ssLogin: HCkSecureString;
ssPassword: HCkSecureString;
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
responseJson: PWideChar;

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

// Imagine we've previously saved our encrypted login and password within a JSON config file
// that contains this:

// {
//   "http_login": "mCrOmA7mBA7Au9RuJGb9hw==",
//   "http_password": "jJtiI9TgErTTpqBz9JtHBw=="
// }

json := CkJsonObject_Create();
CkJsonObject_LoadFile(json,'qa_data/passwords/http.json');

crypt := CkCrypt2_Create();

// These are the encryption settings we previously used to encrypt the credentials within the JSON config file.
CkCrypt2_putCryptAlgorithm(crypt,'aes');
CkCrypt2_putCipherMode(crypt,'cbc');
CkCrypt2_putKeyLength(crypt,128);
CkCrypt2_SetEncodedKey(crypt,'000102030405060708090A0B0C0D0E0F','hex');
CkCrypt2_SetEncodedIV(crypt,'000102030405060708090A0B0C0D0E0F','hex');
CkCrypt2_putEncodingMode(crypt,'base64');

ssLogin := CkSecureString_Create();
ssPassword := CkSecureString_Create();

// Decrypt to the secure string.  (the strings will still held in memory encrypted, but are now encrypted using
// a randomly generated session key.)
CkCrypt2_DecryptSecureENC(crypt,CkJsonObject__stringOf(json,'http_login'),ssLogin);
CkCrypt2_DecryptSecureENC(crypt,CkJsonObject__stringOf(json,'http_password'),ssPassword);

rest := CkRest_Create();

// Connect to a REST server.
bTls := True;
port := 443;
bAutoReconnect := True;
success := CkRest_Connect(rest,'chilkatsoft.com',port,bTls,bAutoReconnect);

// Cause the "Authorization: Basic ..." header to be added to HTTP requests
CkRest_SetAuthBasicSecure(rest,ssLogin,ssPassword);

responseJson := CkRest__fullRequestNoBody(rest,'GET','/helloWorld.html');
if (CkRest_getLastMethodSuccess(rest) <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// Show the LastRequestHeader that was sent.
Memo1.Lines.Add(CkRest__lastRequestHeader(rest));

// The LastRequestHeader looks like this:

// Host: chilkatsoft.com
// Authorization: Basic bXlIdHRwTG9naW46bXlIdHRwUGFzc3dvcmQ=

CkJsonObject_Dispose(json);
CkCrypt2_Dispose(crypt);
CkSecureString_Dispose(ssLogin);
CkSecureString_Dispose(ssPassword);
CkRest_Dispose(rest);

end;