HOTP Class Based on the work of OAuth, and the sample implementation of HMAC OTP http://tools.ietf.org/html/draft-mraihi-oath-hmac-otp-04#appendix-D. More...

Static Public Member Functions
static	generateByCounter ( $key, $counter)
	Generate a HOTP key based on a counter value (event based HOTP) More...

static	generateByTime ( $key, $window, $timestamp=false)
	Generate a HOTP key based on a timestamp and window size. More...

static	generateByTimeWindow ( $key, $window, $min=-1, $max=1, $timestamp=false)
	Generate a HOTP key collection based on a timestamp and window size all keys that could exist between a start and end time will be included in the returned array. More...

static	getTime ()
	Gets the current time Ensures we are operating in UTC for the entire framework Restores the timezone on exit. More...

Detailed Description

HOTP Class Based on the work of OAuth, and the sample implementation of HMAC OTP http://tools.ietf.org/html/draft-mraihi-oath-hmac-otp-04#appendix-D.

Author: Jakob Heuser (firstname)@felocity.com

Note: 2011; BSD-3-Clause

Version: 1.0

Definition at line 11 of file hotp.php.

Member Function Documentation

◆ generateByCounter()

static HOTP::generateByCounter	(	$key,
		$counter
	)

static

Generate a HOTP key based on a counter value (event based HOTP)

Parameters

string	$key	the key to use for hashing
int	$counter	the number of attempts represented in this hashing

Returns: HOTPResult a HOTP Result which can be truncated or output

Definition at line 18 of file hotp.php.

References array().

Referenced by generateByTime(), and generateByTimeWindow().

◆ generateByTime()

static HOTP::generateByTime	(	$key,
		$window,
		$timestamp = `false`
	)

static

Generate a HOTP key based on a timestamp and window size.

Parameters

string	$key	the key to use for hashing
int	$window	the size of the window a key is valid for in seconds
int \| bool	$timestamp	a timestamp to calculate for, defaults to time()

Returns: HOTPResult a HOTP Result which can be truncated or output

Definition at line 49 of file hotp.php.

References generateByCounter(), and getTime().

◆ generateByTimeWindow()

static HOTP::generateByTimeWindow	(	$key,
		$window,
		$min = `-1`,
		$max = `1`,
		$timestamp = `false`
	)

static

Generate a HOTP key collection based on a timestamp and window size all keys that could exist between a start and end time will be included in the returned array.

Parameters

string	$key	the key to use for hashing
int	$window	the size of the window a key is valid for in seconds
int	$min	the minimum window to accept before $timestamp
int	$max	the maximum window to accept after $timestamp
int \| bool	$timestamp	a timestamp to calculate for, defaults to time()