(Delphi DLL) Everyware API RSA Encrypt JSON

See more RSA Examples

Demonstrates how to RSA encrypt JSON using everyware.com's RSA public key.

For more information, see https://docs.everyware.com/docs/access-iframe#sample-json--encrypted-payload

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, StringBuilder, Rsa, PublicKey, JsonObject, CkDateTime;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
json: HCkJsonObject;
dt: HCkDateTime;
sb: HCkStringBuilder;
bCrlf: Boolean;
pubkey: HCkPublicKey;
rsa: HCkRsa;
encryptedJson: PWideChar;
sbUrl: HCkStringBuilder;

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

// First build the JSON to be encrypted.
json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'provider_key','USER GUID HERE');
CkJsonObject_UpdateString(json,'menu_item','payment');
dt := CkDateTime_Create();
CkDateTime_SetFromCurrentSystemTime(dt);
CkJsonObject_UpdateString(json,'date_time',CkDateTime__getAsUnixTimeStr(dt,False));

// This build JSON like the following:

// {
//     "provider_key": "USER GUID HERE",
//     "menu_item": "payment",
//     "date_time": "1588163411"
// }

// When we sign, we'll want to sign the most compact JSON possible
CkJsonObject_putEmitCompact(json,True);

// Everyware's RSA public key is at:  https://docs.everyware.com/docs/everyware-public-rsa-key
sb := CkStringBuilder_Create();
bCrlf := True;
CkStringBuilder_AppendLine(sb,'-----BEGIN PUBLIC KEY-----',bCrlf);
CkStringBuilder_AppendLine(sb,'MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAxNbflxUSWQ3XJ1N9dAoh',bCrlf);
CkStringBuilder_AppendLine(sb,'k+uaiFsg3wkPi9LGS/mH8DtHBgZxKyz+oQBDtnDd9FDEo0ql7MMgCMsTAv27W5vk',bCrlf);
CkStringBuilder_AppendLine(sb,'Pu0rm6zhcTeYquWEuVCS7VtVsyTATr0Z9WhqNeZlIRurovJAXl2jRDX6QeY5dayC',bCrlf);
CkStringBuilder_AppendLine(sb,'ubwyG4lBWE4fCakGY6zlh+oaElK0rvblqjYoEg3dn4KPRCYGof8OFxLptHThD4cE',bCrlf);
CkStringBuilder_AppendLine(sb,'T30j+utVafhO0HRyJ4iR3Pigb4GXdWBtJEEEWddZJizMkjFQkyUAoYLOT8EJ2TW3',bCrlf);
CkStringBuilder_AppendLine(sb,'Tz8SvAuHBUEFcPWTSTMAG/bSp5wrYBTXaeEhx+wrYa60OruHuzgmhzKyQVuYlCNJ',bCrlf);
CkStringBuilder_AppendLine(sb,'HdbnassuIRjjSNo25o4AdSlWwpGfBZjAiyEInR+KGpHdhKTxSekJxiwiXUS0UfSG',bCrlf);
CkStringBuilder_AppendLine(sb,'prOpd5PzWaAR7DvjLsdmR9XffxvJCVxC735gLK7hDJKjCajDPHVDr8FSL8xMlrq0',bCrlf);
CkStringBuilder_AppendLine(sb,'nKxtsHeRl1yzoGrRr12+9MiQnHtpqROTNXcXdwe3v+Vh8V5k8v8oIrcgh1+/N7Bd',bCrlf);
CkStringBuilder_AppendLine(sb,'NiRsy1gFHBdu/he/KcDRT/9/acQFMPLQueGfZxUvU5As6pEONjtKX2MUg2fMF6Rc',bCrlf);
CkStringBuilder_AppendLine(sb,'sQVVrLzg0g7EcuHGfuPeKfD/716MvS8NU7rX+2soijCSQv/e18PJPMVDlcMXjnup',bCrlf);
CkStringBuilder_AppendLine(sb,'PPx1tStemesavFlj1okhS6UCAwEAAQ==',bCrlf);
CkStringBuilder_AppendLine(sb,'-----END PUBLIC KEY-----',bCrlf);

pubkey := CkPublicKey_Create();
success := CkPublicKey_LoadFromString(pubkey,CkStringBuilder__getAsString(sb));
if (success = False) then
  begin
    Memo1.Lines.Add(CkPublicKey__lastErrorText(pubkey));
    Exit;
  end;

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

// We probably need a base64Url encoded encrypted key.
// Using straight-up base64 would potenially include chars that are not URL safe (i.e. have special meanings in URLs)
CkRsa_putEncodingMode(rsa,'base64url');

encryptedJson := CkRsa__encryptStringENC(rsa,CkJsonObject__emit(json),False);

// Build the URL
// Such as:  https://portal.everyware.com/Account/LoginMenu?data={Base64Url_encrypted_JSON}
sbUrl := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,'https://portal.everyware.com/Account/LoginMenu?data=');
CkStringBuilder_Append(sbUrl,encryptedJson);

Memo1.Lines.Add(CkStringBuilder__getAsString(sbUrl));

CkJsonObject_Dispose(json);
CkDateTime_Dispose(dt);
CkStringBuilder_Dispose(sb);
CkPublicKey_Dispose(pubkey);
CkRsa_Dispose(rsa);
CkStringBuilder_Dispose(sbUrl);

end;