Delphi DLL

Rabobank GET /v3/accounts

See more Rabobank Examples

Demonstrates a call to a Rabobank API. Specifically this makes a call to the "Accounts AIS sb" API to deliver all the consented payments accounts for a specific Rabobank customer.

(This includes source code to for signing requests for PSD2 APIs)

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, CkDateTime, Rsa, StringBuilder, JsonObject, PrivateKey, Cert, Crypt2, BinData;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
jsonToken: HCkJsonObject;
sbTppCert: HCkStringBuilder;
crypt: HCkCrypt2;
xRequestId: PWideChar;
dt: HCkDateTime;
dateHdrVal: PWideChar;
payload: PWideChar;
payloadDigest: PWideChar;
sbDigestHdrVal: HCkStringBuilder;
sbStringToSign: HCkStringBuilder;
sbPrivKey: HCkStringBuilder;
privKey: HCkPrivateKey;
rsa: HCkRsa;
b64Signature: PWideChar;
cert: HCkCert;
sbSigHdrVal: HCkStringBuilder;
tlsCert: HCkCert;
bdPrivKey: HCkBinData;
tlsPrivKey: HCkPrivateKey;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
v_linksAccount: PWideChar;
v_linksBalances: PWideChar;
v_linksTransactions: PWideChar;
currency: PWideChar;
iban: PWideChar;
name: PWideChar;
resourceId: PWideChar;
status: PWideChar;
i: Integer;
count_i: Integer;

begin
success := False;

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

http := CkHttp_Create();

// Implements the following CURL command:

// curl --request GET \
//   --url https://api-sandbox.rabobank.nl/openapi/sandbox/payments/account-information/ais/v3/accounts \
//   --header 'accept: application/json' \
//   --header 'authorization: Bearer REPLACE_BEARER_TOKEN' \
//   --header 'date: REPLACE_THIS_VALUE' \
//   --header 'digest: REPLACE_THIS_VALUE' \
//   --header 'psu-ip-address: OPTIONAL' \
//   --header 'signature: REPLACE_THIS_VALUE' \
//   --header 'tpp-signature-certificate: MIIDkDCCAnigA ... cwE6gUl0rMA==' \
//   --header 'x-ibm-client-id: Client ID' \
//   --header 'x-request-id: REPLACE_THIS_VALUE'

// Load the previously fetched OAuth2 access token.
jsonToken := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/rabobank.json');
if (success = False) then
  begin
    Memo1.Lines.Add(CkJsonObject__lastErrorText(jsonToken));
    Exit;
  end;

// This adds the "authorization: Bearer REPLACE_BEARER_TOKEN" header.
CkHttp_putAuthToken(http,CkJsonObject__stringOf(jsonToken,'access_token'));

// This is the TTP Signature certificate: The certificate used for signing the request.
sbTppCert := CkStringBuilder_Create();
CkStringBuilder_Append(sbTppCert,'MIIDkDCCAnigAwIBAgIEWs3AJDANBgkqhkiG9w0BAQsFADCBiTELMAkGA1UEBhMC');
CkStringBuilder_Append(sbTppCert,'TkwxEDAOBgNVBAgMB1V0cmVjaHQxEDAOBgNVBAcMB1V0cmVjaHQxETAPBgNVBAoM');
CkStringBuilder_Append(sbTppCert,'CFJhYm9iYW5rMRwwGgYDVQQLDBNPbmxpbmUgVHJhbnNhY3Rpb25zMSUwIwYDVQQD');
CkStringBuilder_Append(sbTppCert,'DBxQU0QyIEFQSSBQSSBTZXJ2aWNlcyBTYW5kYm94MB4XDTE4MDQxMTA3NTgyOFoX');
CkStringBuilder_Append(sbTppCert,'DTIzMDQxMTA3NTgyOFowgYkxCzAJBgNVBAYTAk5MMRAwDgYDVQQIDAdVdHJlY2h0');
CkStringBuilder_Append(sbTppCert,'MRAwDgYDVQQHDAdVdHJlY2h0MREwDwYDVQQKDAhSYWJvYmFuazEcMBoGA1UECwwT');
CkStringBuilder_Append(sbTppCert,'T25saW5lIFRyYW5zYWN0aW9uczElMCMGA1UEAwwcUFNEMiBBUEkgUEkgU2Vydmlj');
CkStringBuilder_Append(sbTppCert,'ZXMgU2FuZGJveDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANoAjqGW');
CkStringBuilder_Append(sbTppCert,'UgCIm2F+0sBSEwLal+T3u+uldLikpxHCB8iL1GD7FrRjcA+MVsxhvHly7vRsHK+t');
CkStringBuilder_Append(sbTppCert,'QyMSaeK782RHpY33qxPLc8LmoQLb2EuiQxXj9POYkYBQ74qkrZnvKVlR3WoyQWeD');
CkStringBuilder_Append(sbTppCert,'OXnSY2wbNFfkP8ET4ElwyuIIEriwYhab0OIrnnrO8X82/SPZxHwEd3aQjQ6uhiw8');
CkStringBuilder_Append(sbTppCert,'paDspJbS5WjEfuwY16KVVUYlhbtAwGjvc6aK0NBm+LH9fMLpAE6gfGZNy0gzMDor');
CkStringBuilder_Append(sbTppCert,'VNbkQK1IoAGD8p9ZHdB0F3FwkILEjUiQW6nK+/fKDNJ0TBbpgZUpY8bR460qzxKd');
CkStringBuilder_Append(sbTppCert,'eZ1yPDqX2Cjh6fkCAwEAATANBgkqhkiG9w0BAQsFAAOCAQEAYL4iD6noMJAt63kD');
CkStringBuilder_Append(sbTppCert,'ED4RB2mII/lssvHhcxuDpOm3Ims9urubFWEpvV5TgIBAxy9PBinOdjhO1kGJJnYi');
CkStringBuilder_Append(sbTppCert,'7F1jv1qnZwTV1JhYbvxv3+vk0jaiu7Ew7G3ASlzruXyMhN6t6jk9MpaWGl5Uw1T+');
CkStringBuilder_Append(sbTppCert,'gNRUcWQRR44g3ahQRIS/UHkaV+vcpOa8j186/1X0ULHfbcVQk4LMmJeXqNs8sBAU');
CkStringBuilder_Append(sbTppCert,'dKU/c6ssvj8jfJ4SfrurcBhY5UBTOdQOXTPY85aU3iFloerx7Oi9EHewxInOrU5X');
CkStringBuilder_Append(sbTppCert,'zqqTz2AQPXezexVeAQxP27lzqCmYC7CFiam6QBr06VebkmnPLfs76n8CDc1cwE6g');
CkStringBuilder_Append(sbTppCert,'Ul0rMA==');
CkHttp_SetRequestHeader(http,'tpp-signature-certificate',CkStringBuilder__getAsString(sbTppCert));

// ----------------------------------------------------------------
// We're not going to add the psu-ip-address header in this example.

// ----------------------------------------------------------------
// X-Request-ID header...
// Generate a UUID v4.
crypt := CkCrypt2_Create();
xRequestId := CkCrypt2__generateUuid(crypt);
CkHttp_SetRequestHeader(http,'x-request-id',xRequestId);

// ----------------------------------------------------------------
// Date header...
dt := CkDateTime_Create();
CkDateTime_SetFromCurrentSystemTime(dt);
dateHdrVal := CkDateTime__getAsRfc822(dt,False);
// The desire date/time format is the "RFC822" format.
CkHttp_SetRequestHeader(http,'Date',dateHdrVal);

// ----------------------------------------------------------------
// Digest header...
CkCrypt2_putHashAlgorithm(crypt,'SHA256');
CkCrypt2_putEncodingMode(crypt,'base64');
// A GET request has no HTTP request body.  Therefore the payload is the empty string.
payload := '';
payloadDigest := CkCrypt2__hashStringENC(crypt,payload);
sbDigestHdrVal := CkStringBuilder_Create();
CkStringBuilder_Append(sbDigestHdrVal,'SHA-256=');
CkStringBuilder_Append(sbDigestHdrVal,payloadDigest);
CkHttp_SetRequestHeader(http,'digest',CkStringBuilder__getAsString(sbDigestHdrVal));

// ----------------------------------------------------------------
// The HTTP request needs to be signed for PSD2 API's...
// Create the signing string (to use in signing the HTTP request).
// See https://developer.rabobank.nl/signing-requests-psd2-apis
// 
// For "account information" HTTP requests, we must use the following headers in the signing string.
//    date
//    digest
//    x-request-id

sbStringToSign := CkStringBuilder_Create();
CkStringBuilder_Append(sbStringToSign,'date: ');
CkStringBuilder_AppendLine(sbStringToSign,dateHdrVal,False);
CkStringBuilder_Append(sbStringToSign,'digest: ');
CkStringBuilder_AppendLine(sbStringToSign,CkStringBuilder__getAsString(sbDigestHdrVal),False);
CkStringBuilder_Append(sbStringToSign,'x-request-id: ');
CkStringBuilder_Append(sbStringToSign,xRequestId);

// ----------------------------------------------------------------
// Sign with our private key...
sbPrivKey := CkStringBuilder_Create();
CkStringBuilder_Append(sbPrivKey,'MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQDaAI6hllIAiJth');
CkStringBuilder_Append(sbPrivKey,'ftLAUhMC2pfk97vrpXS4pKcRwgfIi9Rg+xa0Y3APjFbMYbx5cu70bByvrUMjEmni');
CkStringBuilder_Append(sbPrivKey,'u/NkR6WN96sTy3PC5qEC29hLokMV4/TzmJGAUO+KpK2Z7ylZUd1qMkFngzl50mNs');
CkStringBuilder_Append(sbPrivKey,'GzRX5D/BE+BJcMriCBK4sGIWm9DiK556zvF/Nv0j2cR8BHd2kI0OroYsPKWg7KSW');
CkStringBuilder_Append(sbPrivKey,'0uVoxH7sGNeilVVGJYW7QMBo73OmitDQZvix/XzC6QBOoHxmTctIMzA6K1TW5ECt');
CkStringBuilder_Append(sbPrivKey,'SKABg/KfWR3QdBdxcJCCxI1IkFupyvv3ygzSdEwW6YGVKWPG0eOtKs8SnXmdcjw6');
CkStringBuilder_Append(sbPrivKey,'l9go4en5AgMBAAECggEAB8nsTqalwGIhFw8mbXuhNUFlGuek/arYLD6pv28swwQH');
CkStringBuilder_Append(sbPrivKey,'7v0ZlxFUcCHF+iBl0PsDwZTZQ4ePtgGS6ehoLkWHCzb1lEv5E1YVG5qKNE2UUwRl');
CkStringBuilder_Append(sbPrivKey,'fIyPakO6AzyV/UF3uzq7C+/GuXGNTKZxKewg5yD/DCFvKoCOpxu9u36FyqP/hw0S');
CkStringBuilder_Append(sbPrivKey,'ADVlmp35/zoPDPZzu1j4FiCo0pJ9LwJcHxeJHopNAKDw9k6I4z/grskdgupsGzK2');
CkStringBuilder_Append(sbPrivKey,'BiGiQ/+wmmO68/6Xa6KWfpr1PQ6ODJHgzZsdGCVi6Ebaqlj6BbsYWxP6h3lrsGt+');
CkStringBuilder_Append(sbPrivKey,'LmHBaN2jCD6cDp+lihqFgnm8hfdv0lmbPilp71EDfwKBgQD6U8PBzZtN8yXm5WuS');
CkStringBuilder_Append(sbPrivKey,'NL+/8q5GjNmeTJBSo1gM6Y8vOT4QAE147LbVuVBDwyHPoSrNejePae6Q14PswjBy');
CkStringBuilder_Append(sbPrivKey,'T7B8DZ0OeQyGa3trrFg/ib7Vv4ZMvJqX9+WzBrzZsxTg7oCKHzmCR4vIRItKHH3z');
CkStringBuilder_Append(sbPrivKey,'Wnnhqlo8ic2AZ2O43cdJosbO1wKBgQDe8UODOLu0vnHohOKeUqF3w/ZOB2+83/js');
CkStringBuilder_Append(sbPrivKey,'YyUbSkzsGvHIwTjObuMUFTQvdMZ6IkIyJdfnDZIbvlBSD8tzL5iKFTNCK2nL1i4G');
CkStringBuilder_Append(sbPrivKey,'iFr0CYLaHAlhJ5GEbTrTMDoJeBPerZq83HPrSa/Wb0xO18QTWsoVQPFfPFbbcQyI');
CkStringBuilder_Append(sbPrivKey,'9ryJ2iIDrwKBgQC6kuAefG46ZPVk6K2KZUJdgDUgZC52a75NuW0RAqszmUiGiJM1');
CkStringBuilder_Append(sbPrivKey,'g8ip9tq6BqAWrprGV0c93shusBKlzf5p1LdHXqYmeVY6gbWVhPipMrNHgN5KJ3BZ');
CkStringBuilder_Append(sbPrivKey,'v+w1yNnMsErpcxne2HL2hPjMJTpj3GSLkm2xIlTrNhIyl9ydlr7IRUhENQKBgQCv');
CkStringBuilder_Append(sbPrivKey,'i6HxbXa/90WSJTCcIcxqla8X+dsOCf3jhJ3vQy4Wq5C+1wZ35fCAG8Ifq/+so9Uj');
CkStringBuilder_Append(sbPrivKey,'z5CVqqXlmpF8TFuSs2OVNuRJsg14J4nOMwgLKIIUZAcurQ10DN5I9Kx+UEK1EFXL');
CkStringBuilder_Append(sbPrivKey,'aHsORdNjMfgQDO2jn9WHrr9gkg6CdB2+qyoCEfS+mQKBgBW08lcy9V5RzRWb/v/j');
CkStringBuilder_Append(sbPrivKey,'xsc7ovmgAhCJhDeV7dPbx4HbFeoQJlbA8g1thdcFlcatSGyNDbvNE1GPSd4NhkpR');
CkStringBuilder_Append(sbPrivKey,'Y6Hfv53kdEzjVkEtU8lUdL7HNVJqX7bU7oZlfbYcwxWQ1Gg8C1oLIAyEt71slQtd');
CkStringBuilder_Append(sbPrivKey,'RiNYBRZTQe2F0wxbXnuUqLAw');

privKey := CkPrivateKey_Create();
success := CkPrivateKey_LoadPem(privKey,CkStringBuilder__getAsString(sbPrivKey));
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

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

CkRsa_putEncodingMode(rsa,'base64');
b64Signature := CkRsa__signStringENC(rsa,CkStringBuilder__getAsString(sbStringToSign),'SHA256');

// ----------------------------------------------------------------
// Add the "signature" header.
// 
// The signature header will look like this:
// signature: keyId="1523433508",algorithm="rsa-sha512",headers="date digest x-request-id",signature="y5o7gKxmfA6AT6...blE1A9Q=="
// 
// The keyId is the serial number of the certificate as defined in 'TPP-Signing-Certificate' header, the format should be Integer not hex. 
cert := CkCert_Create();
success := CkCert_SetFromEncoded(cert,CkStringBuilder__getAsString(sbTppCert));
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(cert));
    Exit;
  end;

sbSigHdrVal := CkStringBuilder_Create();
CkStringBuilder_Append(sbSigHdrVal,'keyId="');
CkStringBuilder_Append(sbSigHdrVal,CkCert__serialDecimal(cert));
CkStringBuilder_Append(sbSigHdrVal,'",');
CkStringBuilder_Append(sbSigHdrVal,'algorithm="rsa-sha256",');
CkStringBuilder_Append(sbSigHdrVal,'headers="date digest x-request-id",');
CkStringBuilder_Append(sbSigHdrVal,'signature="');
CkStringBuilder_Append(sbSigHdrVal,b64Signature);
CkStringBuilder_Append(sbSigHdrVal,'"');

CkHttp_SetRequestHeader(http,'signature',CkStringBuilder__getAsString(sbSigHdrVal));

// ----------------------------------------------------------------
// Add remaining headers...

CkHttp_SetRequestHeader(http,'x-ibm-client-id','YOUR_APP_CLIENT_ID');
CkHttp_SetRequestHeader(http,'accept','application/json');

// ----------------------------------------------------------------
// Add our certificate and key for mutual TLS 
// (provide a registered X509 client certificate during TLS handhake)

tlsCert := CkCert_Create();
success := CkCert_LoadFromFile(tlsCert,'qa_data/certs_and_keys/ING/example_client_tls.cer');
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(tlsCert));
    Exit;
  end;

bdPrivKey := CkBinData_Create();
success := CkBinData_LoadFile(bdPrivKey,'qa_data/certs_and_keys/ING/example_client_tls.key');
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to load example_client_tls.key');
    Exit;
  end;

// The OAuth 2.0 client_id for these certificates is e77d776b-90af-4684-bebc-521e5b2614dd. 
// Please note down this client_id since you will need it in the next steps to call the API.

tlsPrivKey := CkPrivateKey_Create();
success := CkPrivateKey_LoadAnyFormat(tlsPrivKey,bdPrivKey,'');
if (success = False) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(tlsPrivKey));
    Exit;
  end;

// Associate the private key with the certificate.
success := CkCert_SetPrivateKey(tlsCert,tlsPrivKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkCert__lastErrorText(tlsCert));
    Exit;
  end;

success := CkHttp_SetSslClientCert(http,tlsCert);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// ----------------------------------------------------------------
// Finally, send the request...

sbResponseBody := CkStringBuilder_Create();
success := CkHttp_QuickGetSb(http,'https://api-sandbox.rabobank.nl/openapi/sandbox/payments/account-information/ais/v3/accounts',sbResponseBody);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttp_getLastStatus(http);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkHttp__lastHeader(http));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "accounts": [
//     {
//       "_links": {
//         "account": "/v3/accounts/dW9od2VIVUhGVypIZHVpaGRhdWR3OGRoY",
//         "balances": "/v3/accounts/dW9od2VIVUhGVypIZHVpaGRhdWR3OGRoY/balances",
//         "transactions": "/v3/accounts/dW9od2VIVUhGVypIZHVpaGRhdWR3OGRoY/transactions"
//       },
//       "currency": "EUR",
//       "iban": "NL05RABO0812836782",
//       "name": "Rosie Roy",
//       "resourceId": "dW9od2VIVUhGVypIZHVpaGRhdWR3OGRoY",
//       "status": "enabled"
//     }
//   ]
// }

// Sample code for parsing the JSON response...
// Use the following online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

i := 0;
count_i := CkJsonObject_SizeOfArray(jResp,'accounts');
while i < count_i do
  begin
    CkJsonObject_putI(jResp,i);
    v_linksAccount := CkJsonObject__stringOf(jResp,'accounts[i]._links.account');
    v_linksBalances := CkJsonObject__stringOf(jResp,'accounts[i]._links.balances');
    v_linksTransactions := CkJsonObject__stringOf(jResp,'accounts[i]._links.transactions');
    currency := CkJsonObject__stringOf(jResp,'accounts[i].currency');
    iban := CkJsonObject__stringOf(jResp,'accounts[i].iban');
    name := CkJsonObject__stringOf(jResp,'accounts[i].name');
    resourceId := CkJsonObject__stringOf(jResp,'accounts[i].resourceId');
    status := CkJsonObject__stringOf(jResp,'accounts[i].status');
    i := i + 1;
  end;

CkHttp_Dispose(http);
CkJsonObject_Dispose(jsonToken);
CkStringBuilder_Dispose(sbTppCert);
CkCrypt2_Dispose(crypt);
CkDateTime_Dispose(dt);
CkStringBuilder_Dispose(sbDigestHdrVal);
CkStringBuilder_Dispose(sbStringToSign);
CkStringBuilder_Dispose(sbPrivKey);
CkPrivateKey_Dispose(privKey);
CkRsa_Dispose(rsa);
CkCert_Dispose(cert);
CkStringBuilder_Dispose(sbSigHdrVal);
CkCert_Dispose(tlsCert);
CkBinData_Dispose(bdPrivKey);
CkPrivateKey_Dispose(tlsPrivKey);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;