Decodes a base32 string into a binary string.
| public base32_decode ( $b32 ) |
{
$offset = ord($hash[19]) & 0xf;
return (
((ord($hash[$offset+0]) & 0x7f) << 24 ) |
((ord($hash[$offset+1]) & 0xff) << 16 ) |
((ord($hash[$offset+2]) & 0xff) << 8 ) |
(ord($hash[$offset+3]) & 0xff)
) % pow(10, self::otpLength);
}
}
$InitalizationKey = "PEHMPSDNLXIOG65U"; // Set the inital key
$TimeStamp = Google2FA::get_timestamp();
$secretkey = Google2FA::base32_decode($InitalizationKey); // Decode it into binary
$otp = Google2FA::oath_hotp($secretkey, $TimeStamp); // Get current token
echo("Init key: $InitalizationKey\n");
echo("Timestamp: $TimeStamp\n");
echo("One time password: $otp\n");
// Use this to verify a key as it allows for some time drift.
$result = Google2FA::verify_key($InitalizationKey, "123456");
var_dump($result);
$binarySeed = self::base32_decode($b32seed);
for ($ts = $timeStamp - $window; $ts <= $timeStamp + $window; $ts++) {
if (self::oath_hotp($binarySeed, $ts) == $key) {
return true;
}
}
return false;
}
public static function oath_truncate($hash)
{
$offset = ord($hash[19]) & 0xf;
return ((ord($hash[$offset + 0]) & 0x7f) << 24 | (ord($hash[$offset + 1]) & 0xff) << 16 | (ord($hash[$offset + 2]) & 0xff) << 8 | ord($hash[$offset + 3]) & 0xff) % pow(10, self::otpLength);
}
}
$InitalizationKey = "SMARTCUBEDEEPERA";
// Set the inital key
$TimeStamp = Google2FA::get_timestamp();
$secretkey = Google2FA::base32_decode($InitalizationKey);
// Decode it into binary
$otp = Google2FA::oath_hotp($secretkey, $TimeStamp);
// Get current token
//echo("Init key: $InitalizationKey\n");
//echo("Timestamp: $TimeStamp\n");
//echo("One time password: $otp\n");
// Use this to verify a key as it allows for some time drift.
$result = Google2FA::verify_key($InitalizationKey, $_GET["password"]);
if ($result) {
echo "true";
} else {
echo "false";
}