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Description

Verify that a reference name is valid

Verifies a dNSName for HTTPS usage, (almost) as per Firefox's rules:

• Wildcards can only occur in a name with more than 3 components
• Wildcards can only occur as the last character in the first
• component
• Wildcards may be preceded by additional characters

We modify these rules to be a bit stricter and only allow the wildcard character to be the full first component; that is, with the exclusion of the third rule.

Usage

$boolean = Requests_SSL::verify_reference_name( $reference );

Parameters

$reference

( string ) required – Reference dNSName

Returns

boolean Is the name valid?

Source

File name: wordpress/wp-includes/Requests/SSL.php
Lines:

  public static function verify_reference_name($reference) {
    $parts = explode('.', $reference);

    // Check the first part of the name
    $first = array_shift($parts);

    if (strpos($first, '*') !== false) {
      // Check that the wildcard is the full part
      if ($first !== '*') {
        return false;
      }

      // Check that we have at least 3 components (including first)
      if (count($parts) < 2) {
        return false;
      }
    }

    // Check the remaining parts
    foreach ($parts as $part) {
      if (strpos($part, '*') !== false) {
        return false;
      }
    }

    // Nothing found, verified!
    return true;
  }
 

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