function urllogin_base64dec in urllogin 8

Same name and namespace in other branches

1. 6 urllogin_security.inc \urllogin_base64dec()
2. 7 urllogin_security.inc \urllogin_base64dec()
3. 2.x urllogin_security.inc \urllogin_base64dec()

Converts a base64url encoded string.

Converts a base64url encoded string into a pair of integers plus an extra byte.

Parameters

int $i: First Integer, passed by reference.

int $j: Second Integer, passed by reference.

string $x: Extra byte, passed by reference.

string $urlstr: Encoded string as base64 with the '=' stripped off the end.

Return value

bool Return TRUE if successful, FALSE if $urlstr was invalid base64url

1 call to urllogin_base64dec()

urllogin_decode in ./urllogin_security.inc

Decodes an encoded url string.

File

./urllogin_security.inc, line 141

Include file for urllogin security functions.

Code

function urllogin_base64dec(&$i, &$j, &$x, $urlstr) {

  // Do not use drupal_strlen because this is a binary string, not UTF.
  if (strlen($urlstr) != 12) {

    // URL wrong length.
    return FALSE;
  }

  // Modify to use base64url decoding and decode
  // if (version_compare(PHP_VERSION, '5.2.0', '>=')) {.
  $s = base64_decode(strtr($urlstr, '-_,', '+/='), TRUE);
  if ($s == FALSE) {
    return FALSE;
  }
  $i = ord($s[0]) << 24 | ord($s[1]) << 16 | ord($s[2]) << 8 | ord($s[3]);
  $j = ord($s[4]) << 24 | ord($s[5]) << 16 | ord($s[6]) << 8 | ord($s[7]);
  $x = ord($s[8]);
  return TRUE;
}