function _acquia_search_derived_key in Acquia Search 6

Same name and namespace in other branches

1. 6.3 acquia_search.module \_acquia_search_derived_key()

Derive a key for the solr hmac using the information shared with acquia.com.

3 calls to _acquia_search_derived_key()

AcquiaSearchTest::testHMAC in tests/acquia_search.test

acquia_search_authenticator in ./acquia_search.module

Creates an authenticator based on a data string and HMAC-SHA1.

acquia_search_valid_response in ./acquia_search.module

Validate the authenticity of returned data using a nonce and HMAC-SHA1.

File

./acquia_search.module, line 305

Integration between Acquia Drupal and Acquia's hosted solr search service.

Code

function _acquia_search_derived_key() {
  static $derived_key = NULL;
  if (!isset($derived_key) && acquia_agent_subscription_is_active()) {
    $key = acquia_agent_settings('acquia_key');
    $identifier = acquia_agent_settings('acquia_identifier');
    $derived_key_salt = acquia_search_derived_key_salt();

    // We use a salt from acquia.com in key derivation since this is a shared
    // value that we could change on the AN side if needed to force any
    // or all clients to use a new derived key.  We also use a string
    // ('solr') specific to the service, since we want each service using a
    // derived key to have a separate one.
    if (empty($derived_key_salt) || empty($key) || empty($identifier)) {

      // Expired or invalid subscription - don't continue.
      $derived_key = '';
    }
    else {
      $derivation_string = $identifier . 'solr' . $derived_key_salt;
      $derived_key = _acquia_search_hmac($key, str_pad($derivation_string, 80, $derivation_string));
    }
  }
  return $derived_key;
}