diff options
Diffstat (limited to 'src/TwoFactorAuth.php')
| -rw-r--r-- | src/TwoFactorAuth.php | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/src/TwoFactorAuth.php b/src/TwoFactorAuth.php index ab86eba..5c2ce84 100644 --- a/src/TwoFactorAuth.php +++ b/src/TwoFactorAuth.php @@ -34,11 +34,10 @@ class TwoFactorAuth { if (!($qrcodeprovider instanceof IQRCodeProvider)) throw new Exception('QRCodeProvider must implement IQRCodeProvider'); - $this->qrcodeprovider = new GoogleQRCodeProvider(); + $this->qrcodeprovider = $qrcodeprovider; self::$_base32 = str_split('ABCDEFGHIJKLMNOPQRSTUVWXYZ234567='); - for ($i = 0; $i < sizeof(self::$_base32); $i++) - self::$_base32lookup[self::$_base32[$i]] = $i; + self::$_base32lookup = array_flip(self::$_base32); } /** @@ -61,8 +60,7 @@ class TwoFactorAuth { $ts = "\0\0\0\0".pack('N*', $this->getTimeSlice($this->getTime($time))); // Pack time into binary string $hm = hash_hmac($this->algorithm, $ts, $secretkey, true); // Hash it with users secret key - $offset = ord(substr($hm, -1)) & 0x0F; // Use last nibble of result as index/offset - $hashpart = substr($hm, $offset, 4); // Grab 4 bytes of the result + $hashpart = substr($hm, ord(substr($hm, -1)) & 0x0F, 4); // Use last nibble of result as index/offset and grab 4 bytes of the result $value = unpack('N', $hashpart); // Unpack binary value $value = $value[1] & 0x7FFFFFFF; // Drop MSB, keep only 31 bits |