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tt-rss/vendor/OTPHP/HOTP.php

75 lines
2.6 KiB
PHP

<?php
/*
* Copyright (c) 2011 Le Lag
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
namespace OTPHP {
/**
* HOTP - One time password generator
*
* The HOTP class allow for the generation
* and verification of one-time password using
* the HOTP specified algorithm.
*
* This class is meant to be compatible with
* Google Authenticator
*
* This class was originally ported from the rotp
* ruby library available at https://github.com/mdp/rotp
*/
class HOTP extends OTP {
/**
* Get the password for a specific counter value
* @param integer $count the counter which is used to
* seed the hmac hash function.
* @return integer the One Time Password
*/
public function at($count) {
return $this->generateOTP($count);
}
/**
* Verify if a password is valid for a specific counter value
*
* @param integer $otp the one-time password
* @param integer $counter the counter value
* @return bool true if the counter is valid, false otherwise
*/
public function verify($otp, $counter) {
return ($otp == $this->at($counter));
}
/**
* Returns the uri for a specific secret for hotp method.
* Can be encoded as a image for simple configuration in
* Google Authenticator.
*
* @param string $name the name of the account / profile
* @param integer $initial_count the initial counter
* @return string the uri for the hmac secret
*/
public function provisioning_uri($name, $initial_count) {
return "otpauth://hotp/".urlencode($name)."?secret={$this->secret}&counter=$initial_count";
}
}
}