function aes_make_key in AES encryption 7

Same name and namespace in other branches

1. 5 aes.module \aes_make_key()
2. 6 aes.module \aes_make_key()

Generate a random key, containing uppercase, lowercase and digits.

Return value

string Encryption key.

1 call to aes_make_key()

aes_get_key in ./aes.module

Gets the current key used for the encryption system. If there's currently no key defined, this function will generate one, store it, and return it.

File

./aes.module, line 410

Main file of the AES encryption module.

Code

function aes_make_key() {
  $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
  srand();
  while (TRUE) {
    $key = '';
    while (strlen($key) < 32) {
      $key .= substr($chars, rand(0, strlen($chars)), 1);
    }

    // is there at least one lowercase letter?
    if (!preg_match('/.*[a-z].*/', $key)) {
      continue;
    }

    // is there at least one uppercase letter?
    if (!preg_match('/.*[A-Z].*/', $key)) {
      continue;
    }

    // is there at least one numeric?
    if (!preg_match('/.*[0-9].*/', $key)) {
      continue;
    }
    break;
  }
  return $key;
}