Auth

A class for generating the codes compatible with the Google Authenticator and similar TOTP clients. NOTE: A lot of the logic from this class has been borrowed from this class: https://www.idontplaydarts.com/wp-content/uploads/2011/07/ga.php_.txt

Open source code

Methods Summary
`public`	# `__construct( string $initKey = NULL )` Initialize the object and set up the lookup table Optionally the Initialization key
`public`	# `buildLookup( )` Build the base32 lookup table
`public`	# `getRange( )` Get the current "range" value
`public`	# `setRange( int $range )` Set the "range" value
`public`	# `setInitKey( string $key )` Set the initialization key for the object
`public`	# `getInitKey( )` Get the current Initialization key
`public`	# `setLookup( array $lookup )` Set the contents of the internal lookup table
`public`	# `getLookup( )` Get the current lookup data set
`public`	# `getRefresh( )` Get the number of seconds for code refresh currently set
`public`	# `setRefresh( int $seconds )` Set the number of seconds to refresh codes
`public`	# `getCodeLength( )` Get the current length for generated codes
`public`	# `setCodeLength( int $length )` Set the length of the generated codes
`public`	# `validateCode( string $code , string $initKey = NULL, string $timestamp = NULL, int $range = NULL )` Validate the given code
`public`	# `generateOneTime( string $initKey = NULL, string $timestamp = NULL )` Generate a one-time code
`public`	# `generateCode( int $length = 16 )` Generate a code/hash Useful for making Initialization codes
`public`	# `generateTimestamp( )` Generate the timestamp for the calculation
`public`	# `truncateHash( string $hash )` Truncate the given hash down to just what we need
`public`	# `base32_decode( string $hash )` Base32 decoding function
`public`	# `getQrCodeUrl( string $name , string $code )` Returns a URL to QR code for embedding the QR code