function _openid_signature in Drupal 6

Same name and namespace in other branches

1. 7 modules/openid/openid.inc \_openid_signature()

Sign certain keys in a message

Parameters

$association - object loaded from openid_association or openid_server_association table:

• important fields are ->assoc_type and ->mac_key

$message_array - array of entire message about to be sent:

$keys_to_sign - keys in the message to include in signature (without: 'openid.' appended)

1 call to _openid_signature()

openid_verify_assertion_signature in modules/openid/openid.module

Verify the signature of the response received from the OpenID provider.

File

modules/openid/openid.inc, line 229

OpenID utility functions.

Code

function _openid_signature($association, $message_array, $keys_to_sign) {
  $signature = '';
  $sign_data = array();
  foreach ($keys_to_sign as $key) {
    if (isset($message_array['openid.' . $key])) {
      $sign_data[$key] = $message_array['openid.' . $key];
    }
  }
  $message = _openid_create_message($sign_data);
  $secret = base64_decode($association->mac_key);
  $signature = _openid_hmac($secret, $message);
  return base64_encode($signature);
}