public static Crypt::hmacBase64($data, $key)
Calculates a base-64 encoded, URL-safe sha-256 hmac.
Parameters
mixed $data: Scalar value to be validated with the hmac.
mixed $key: A secret key, this can be any scalar value.
Return value
string A base-64 encoded sha-256 hmac, with + replaced with -, / with _ and any = padding characters removed.
File
- core/lib/Drupal/Component/Utility/Crypt.php, line 46
Class
- Crypt
- Utility class for cryptographically-secure string handling routines.
Namespace
Drupal\Component\Utility
Code
public static function hmacBase64($data, $key) {
// $data and $key being strings here is necessary to avoid empty string
// results of the hash function if they are not scalar values. As this
// function is used in security-critical contexts like token validation it
// is important that it never returns an empty string.
if (!is_scalar($data) || !is_scalar($key)) {
throw new \InvalidArgumentException('Both parameters passed to \Drupal\Component\Utility\Crypt::hmacBase64 must be scalar values.');
}
$hmac = base64_encode(hash_hmac('sha256', $data, $key, TRUE));
// Modify the hmac so it's safe to use in URLs.
return str_replace(['+', '/', '='], ['-', '_', ''], $hmac);
}
Please login to continue.