Issues in Class-TOTP.php - New Issues - Inspection of "Merge pull request #4161 from albertlast/FasterRep..." - albertlast/SMF2.1 - Measure and Improve Code Quality continuously with Scrutinizer

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Push — release-2.1 ( aa21c4...7040ad )

by Mathias

created 2017-06-30 14:08 UTC

Sources/Class-TOTP.php (12 issues)

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<?php

namespace TOTP;

/**
 * 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
 *
 * @author Chris Cornutt <[email protected]>
 * @package GAuth
 * @license MIT
 *
 * Simple Machines Forum (SMF)
 *
 * @package SMF
 * @author Simple Machines http://www.simplemachines.org
 * @copyright 2017 Simple Machines and individual contributors
 * @license http://www.simplemachines.org/about/smf/license.php BSD
 *
 * @version 2.1 Beta 4
 */

/**
 * Class Auth
 * @package TOTP
 */
class Auth
{
	/**
	 * @var array Internal lookup table
	 */
	private $lookup = array();

	/**
	 * @var string Initialization key
	 */
	private $initKey = null;

	/**
	 * @var integer Seconds between key refreshes
	 */
	private $refreshSeconds = 30;

	/**
	 * @var integer The length of codes to generate
	 */
	private $codeLength = 6;

	/**
	 * @var integer Range plus/minus for "window of opportunity" on allowed codes
	 */
	private $range = 2;

	/**
	 * Initialize the object and set up the lookup table
	 *     Optionally the Initialization key
	 *
	 * @param string $initKey Initialization key
	 */
	public function __construct($initKey = null)
	{
		$this->buildLookup();

		if ($initKey !== null) {
			$this->setInitKey($initKey);
		}
	}

	/**
	 * Build the base32 lookup table
	 */
	public function buildLookup()
	{
		$lookup = array_combine(
			array_merge(range('A', 'Z'), range(2, 7)),
			range(0, 31)
		);
		$this->setLookup($lookup);
	}

	/**
	 * Get the current "range" value
	 * @return integer Range value
	 */
	public function getRange()
	{
		return $this->range;
	}

	/**
	 * Set the "range" value
	 *
	 * @param integer $range Range value
	 * @return \TOTP\Auth instance
	 */
	public function setRange($range)
	{
		if (!is_numeric($range)) {
			throw new \InvalidArgumentException('Invalid window range');
		}
		$this->range = $range;
class Id
{
    public $id;

    public function __construct($id)
    {
        $this->id = $id;
    }

}

class Account
{
    /** @var  Id $id */
    public $id;
}

$account_id = false;

if (starsAreRight()) {
    $account_id = new Id(42);
}

$account = new Account();
if ($account instanceof Id)
{
    $account->id = $account_id;
}
		return $this;
	}

	/**
	 * Set the initialization key for the object
	 *
	 * @param string $key Initialization key
	 * @throws \InvalidArgumentException If hash is not valid base32
	 * @return \TOTP\Auth instance
	 */
	public function setInitKey($key)
	{
		if (preg_match('/^[' . implode('', array_keys($this->getLookup())) . ']+$/', $key) == false) {

			throw new \InvalidArgumentException('Invalid base32 hash!');
		}
		$this->initKey = $key;
		return $this;
	}

	/**
	 * Get the current Initialization key
	 *
	 * @return string Initialization key
	 */
	public function getInitKey()
	{
		return $this->initKey;
	}

	/**
	 * Set the contents of the internal lookup table
	 *
	 * @param array $lookup Lookup data set
	 * @throws \InvalidArgumentException If lookup given is not an array
	 * @return \TOTP\Auth instance
	 */
	public function setLookup($lookup)
	{
		if (!is_array($lookup)) {
			throw new \InvalidArgumentException('Lookup value must be an array');
		}
		$this->lookup = $lookup;
		return $this;
	}

	/**
	 * Get the current lookup data set
	 *
	 * @return array Lookup data
	 */
	public function getLookup()
	{
		return $this->lookup;
	}

	/**
	 * Get the number of seconds for code refresh currently set
	 *
	 * @return integer Refresh in seconds
	 */
	public function getRefresh()
	{
		return $this->refreshSeconds;
	}

	/**
	 * Set the number of seconds to refresh codes
	 *
	 * @param integer $seconds Seconds to refresh
	 * @throws \InvalidArgumentException If seconds value is not numeric
	 * @return \TOTP\Auth instance
	 */
	public function setRefresh($seconds)
	{
		if (!is_numeric($seconds)) {
			throw new \InvalidArgumentException('Seconds must be numeric');
		}
		$this->refreshSeconds = $seconds;
class Id
{
    public $id;

    public function __construct($id)
    {
        $this->id = $id;
    }

}

class Account
{
    /** @var  Id $id */
    public $id;
}

$account_id = false;

if (starsAreRight()) {
    $account_id = new Id(42);
}

$account = new Account();
if ($account instanceof Id)
{
    $account->id = $account_id;
}
		return $this;
	}

	/**
	 * Get the current length for generated codes
	 *
	 * @return integer Code length
	 */
	public function getCodeLength()
	{
		return $this->codeLength;
	}

	/**
	 * Set the length of the generated codes
	 *
	 * @param integer $length Code length
	 * @return \TOTP\Auth instance
	 */
	public function setCodeLength($length)
	{
		$this->codeLength = $length;
		return $this;
	}

	/**
	 * Validate the given code
	 *
	 * @param string $code Code entered by user
	 * @param string $initKey Initialization key
	 * @param string $timestamp Timestamp for calculation
	 * @param integer $range Seconds before/after to validate hash against
	 * @throws \InvalidArgumentException If incorrect code length
	 * @return boolean Pass/fail of validation
	 */
	public function validateCode($code, $initKey = null, $timestamp = null, $range = null)
	{
		if (strlen($code) !== $this->getCodeLength()) {
			throw new \InvalidArgumentException('Incorrect code length');
		}

		$range = ($range == null) ? $this->getRange() : $range;

		$timestamp = ($timestamp == null) ? $this->generateTimestamp() : $timestamp;

		$initKey = ($initKey == null) ? $this->getInitKey() : $initKey;


		$binary = $this->base32_decode($initKey);

		for ($time = ($timestamp - $range); $time <= ($timestamp + $range); $time++) {
			if ($this->generateOneTime($binary, $time) == $code) {
				return true;
			}
		}
		return false;
	}

	/**
	 * Generate a one-time code
	 *
	 * @param string $initKey Initialization key [optional]
	 * @param string $timestamp Timestamp for calculation [optional]
	 * @return string Generated code/hash
	 */
	public function generateOneTime($initKey = null, $timestamp = null)
	{
		$initKey = ($initKey == null) ? $this->getInitKey() : $initKey;

		$timestamp = ($timestamp == null) ? $this->generateTimestamp() : $timestamp;


		$hash = hash_hmac(
			'sha1',
			pack('N*', 0) . pack('N*', $timestamp),
			$initKey,
			true
		);

		return str_pad($this->truncateHash($hash), $this->getCodeLength(), '0', STR_PAD_LEFT);
	}

	/**
	 * Generate a code/hash
	 *     Useful for making Initialization codes
	 *
	 * @param integer $length Length for the generated code
	 * @return string Generated code
	 */
	public function generateCode($length = 16)
	{
		$lookup = implode('', array_keys($this->getLookup()));
		$code = '';

		for ($i = 0; $i < $length; $i++) {
			$code .= $lookup[mt_rand(0, strlen($lookup) - 1)];
		}

		return $code;
	}

	/**
	 * Generate the timestamp for the calculation
	 *
	 * @return integer Timestamp
	 */
	public function generateTimestamp()
	{
		return floor(microtime(true) / $this->getRefresh());
	}

	/**
	 * Truncate the given hash down to just what we need
	 *
	 * @param string $hash Hash to truncate
	 * @return string Truncated hash value
	 */
	public function truncateHash($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, $this->getCodeLength());
	}

	/**
	 * Base32 decoding function
	 *
	 * @param string $hash The base32-encoded hash
	 * @throws \InvalidArgumentException When hash is not valid
	 * @return string Binary value of hash
	 */
	public function base32_decode($hash)
	{
		$lookup = $this->getLookup();

		if (preg_match('/^[' . implode('', array_keys($lookup)) . ']+$/', $hash) == false) {

			throw new \InvalidArgumentException('Invalid base32 hash!');
		}

		$hash = strtoupper($hash);
		$buffer = 0;
		$length = 0;
		$binary = '';

		for ($i = 0; $i < strlen($hash); $i++) {
			$buffer = $buffer << 5;
			$buffer += $lookup[$hash[$i]];
			$length += 5;

			if ($length >= 8) {
				$length -= 8;
				$binary .= chr(($buffer & (0xFF << $length)) >> $length);
			}
		}

		return $binary;
	}

	/**
	 * Returns a URL to QR code for embedding the QR code
	 *
	 * @param string $name The name
	 * @param string $code The generated code
	 * @return string The URL to the QR code
	 */
	public function getQrCodeUrl($name, $code)
	{
		$urlencoded = urlencode('otpauth://totp/' . urlencode($name) . '?secret=' . $code);
		return 'https://chart.googleapis.com/chart?chs=200x200&chld=M|0&cht=qr&chl=' . $urlencoded;
	}
}

?>


1		<?php
2
3		namespace TOTP;
4
5		/**
6		* A class for generating the codes compatible with the Google Authenticator and similar TOTP
7		* clients.
8		*
9		* NOTE: A lot of the logic from this class has been borrowed from this class:
10		* https://www.idontplaydarts.com/wp-content/uploads/2011/07/ga.php_.txt
11		*
12		* @author Chris Cornutt <[email protected]>
13		* @package GAuth
14		* @license MIT
15		*
16		* Simple Machines Forum (SMF)
17		*
18		* @package SMF
19		* @author Simple Machines http://www.simplemachines.org
20		* @copyright 2017 Simple Machines and individual contributors
21		* @license http://www.simplemachines.org/about/smf/license.php BSD
22		*
23		* @version 2.1 Beta 4
24		*/
25
26		/**
27		* Class Auth
28		* @package TOTP
29		*/
30		class Auth
31		{
32		/**
33		* @var array Internal lookup table
34		*/
35		private $lookup = array();
36
37		/**
38		* @var string Initialization key
39		*/
40		private $initKey = null;
41
42		/**
43		* @var integer Seconds between key refreshes
44		*/
45		private $refreshSeconds = 30;
46
47		/**
48		* @var integer The length of codes to generate
49		*/
50		private $codeLength = 6;
51
52		/**
53		* @var integer Range plus/minus for "window of opportunity" on allowed codes
54		*/
55		private $range = 2;
56
57		/**
58		* Initialize the object and set up the lookup table
59		* Optionally the Initialization key
60		*
61		* @param string $initKey Initialization key
62		*/
63		public function __construct($initKey = null)
64		{
65		$this->buildLookup();
66
67		if ($initKey !== null) {
68		$this->setInitKey($initKey);
69		}
70		}
71
72		/**
73		* Build the base32 lookup table
74		*/
75		public function buildLookup()
76		{
77		$lookup = array_combine(
78		array_merge(range('A', 'Z'), range(2, 7)),
79		range(0, 31)
80		);
81		$this->setLookup($lookup);
82		}
83
84		/**
85		* Get the current "range" value
86		* @return integer Range value
87		*/
88		public function getRange()
89		{
90		return $this->range;
91		}
92
93		/**
94		* Set the "range" value
95		*
96		* @param integer $range Range value
97		* @return \TOTP\Auth instance
98		*/
99		public function setRange($range)
100		{
101		if (!is_numeric($range)) {
102		throw new \InvalidArgumentException('Invalid window range');
103		}
104		$this->range = $range;
		0 ignored issues – show Documentation Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like `$range` can also be of type `double` or `string`. However, the property `$range` is declared as type `integer`. Maybe add an additional type check? Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable `$accountId` that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to the `id` property of an instance of the `Account` class. This class holds a proper account, so the id value must no longer be false. Either this assignment is in error or a type check should be added for that assignment. class Id { public $id; public function __construct($id) { $this->id = $id; } } class Account { /** @var Id $id */ public $id; } $account_id = false; if (starsAreRight()) { $account_id = new Id(42); } $account = new Account(); if ($account instanceof Id) { $account->id = $account_id; } Loading history...
105		return $this;
106		}
107
108		/**
109		* Set the initialization key for the object
110		*
111		* @param string $key Initialization key
112		* @throws \InvalidArgumentException If hash is not valid base32
113		* @return \TOTP\Auth instance
114		*/
115		public function setInitKey($key)
116		{
117	View Code Duplication	if (preg_match('/^[' . implode('', array_keys($this->getLookup())) . ']+$/', $key) == false) {
		0 ignored issues – show Bug Best Practice introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `preg_match('/^[' . implo...kup())) . ']+$/', $key)` of type `integer` to the boolean `false`. If you are specifically checking for 0, consider using something more explicit like `=== 0` instead. Loading history... Duplication introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
118		throw new \InvalidArgumentException('Invalid base32 hash!');
119		}
120		$this->initKey = $key;
121		return $this;
122		}
123
124		/**
125		* Get the current Initialization key
126		*
127		* @return string Initialization key
128		*/
129		public function getInitKey()
130		{
131		return $this->initKey;
132		}
133
134		/**
135		* Set the contents of the internal lookup table
136		*
137		* @param array $lookup Lookup data set
138		* @throws \InvalidArgumentException If lookup given is not an array
139		* @return \TOTP\Auth instance
140		*/
141		public function setLookup($lookup)
142		{
143		if (!is_array($lookup)) {
144		throw new \InvalidArgumentException('Lookup value must be an array');
145		}
146		$this->lookup = $lookup;
147		return $this;
148		}
149
150		/**
151		* Get the current lookup data set
152		*
153		* @return array Lookup data
154		*/
155		public function getLookup()
156		{
157		return $this->lookup;
158		}
159
160		/**
161		* Get the number of seconds for code refresh currently set
162		*
163		* @return integer Refresh in seconds
164		*/
165		public function getRefresh()
166		{
167		return $this->refreshSeconds;
168		}
169
170		/**
171		* Set the number of seconds to refresh codes
172		*
173		* @param integer $seconds Seconds to refresh
174		* @throws \InvalidArgumentException If seconds value is not numeric
175		* @return \TOTP\Auth instance
176		*/
177		public function setRefresh($seconds)
178		{
179		if (!is_numeric($seconds)) {
180		throw new \InvalidArgumentException('Seconds must be numeric');
181		}
182		$this->refreshSeconds = $seconds;
		0 ignored issues – show Documentation Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like `$seconds` can also be of type `double` or `string`. However, the property `$refreshSeconds` is declared as type `integer`. Maybe add an additional type check? Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable `$accountId` that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to the `id` property of an instance of the `Account` class. This class holds a proper account, so the id value must no longer be false. Either this assignment is in error or a type check should be added for that assignment. class Id { public $id; public function __construct($id) { $this->id = $id; } } class Account { /** @var Id $id */ public $id; } $account_id = false; if (starsAreRight()) { $account_id = new Id(42); } $account = new Account(); if ($account instanceof Id) { $account->id = $account_id; } Loading history...
183		return $this;
184		}
185
186		/**
187		* Get the current length for generated codes
188		*
189		* @return integer Code length
190		*/
191		public function getCodeLength()
192		{
193		return $this->codeLength;
194		}
195
196		/**
197		* Set the length of the generated codes
198		*
199		* @param integer $length Code length
200		* @return \TOTP\Auth instance
201		*/
202		public function setCodeLength($length)
203		{
204		$this->codeLength = $length;
205		return $this;
206		}
207
208		/**
209		* Validate the given code
210		*
211		* @param string $code Code entered by user
212		* @param string $initKey Initialization key
213		* @param string $timestamp Timestamp for calculation
214		* @param integer $range Seconds before/after to validate hash against
215		* @throws \InvalidArgumentException If incorrect code length
216		* @return boolean Pass/fail of validation
217		*/
218		public function validateCode($code, $initKey = null, $timestamp = null, $range = null)
219		{
220		if (strlen($code) !== $this->getCodeLength()) {
221		throw new \InvalidArgumentException('Incorrect code length');
222		}
223
224		$range = ($range == null) ? $this->getRange() : $range;
		0 ignored issues – show Bug Best Practice introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `$range` of type `integer\|null` against `null`; this is ambiguous if the integer can be zero. Consider using a strict comparison `===` instead. Loading history...
225		$timestamp = ($timestamp == null) ? $this->generateTimestamp() : $timestamp;
		0 ignored issues – show Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `$timestamp` of type `string\|null` against `null`; this is ambiguous if the string can be empty. Consider using a strict comparison `===` instead. Loading history...
226		$initKey = ($initKey == null) ? $this->getInitKey() : $initKey;
		0 ignored issues – show Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `$initKey` of type `string\|null` against `null`; this is ambiguous if the string can be empty. Consider using a strict comparison `===` instead. Loading history...
227
228		$binary = $this->base32_decode($initKey);
229
230		for ($time = ($timestamp - $range); $time <= ($timestamp + $range); $time++) {
231		if ($this->generateOneTime($binary, $time) == $code) {
232		return true;
233		}
234		}
235		return false;
236		}
237
238		/**
239		* Generate a one-time code
240		*
241		* @param string $initKey Initialization key [optional]
242		* @param string $timestamp Timestamp for calculation [optional]
243		* @return string Generated code/hash
244		*/
245		public function generateOneTime($initKey = null, $timestamp = null)
246		{
247		$initKey = ($initKey == null) ? $this->getInitKey() : $initKey;
		0 ignored issues – show Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `$initKey` of type `string\|null` against `null`; this is ambiguous if the string can be empty. Consider using a strict comparison `===` instead. Loading history...
248		$timestamp = ($timestamp == null) ? $this->generateTimestamp() : $timestamp;
		0 ignored issues – show Bug introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `$timestamp` of type `string\|null` against `null`; this is ambiguous if the string can be empty. Consider using a strict comparison `===` instead. Loading history...
249
250		$hash = hash_hmac(
251		'sha1',
252		pack('N', 0) . pack('N', $timestamp),
253		$initKey,
254		true
255		);
256
257		return str_pad($this->truncateHash($hash), $this->getCodeLength(), '0', STR_PAD_LEFT);
258		}
259
260		/**
261		* Generate a code/hash
262		* Useful for making Initialization codes
263		*
264		* @param integer $length Length for the generated code
265		* @return string Generated code
266		*/
267		public function generateCode($length = 16)
268		{
269		$lookup = implode('', array_keys($this->getLookup()));
270		$code = '';
271
272		for ($i = 0; $i < $length; $i++) {
273		$code .= $lookup[mt_rand(0, strlen($lookup) - 1)];
274		}
275
276		return $code;
277		}
278
279		/**
280		* Generate the timestamp for the calculation
281		*
282		* @return integer Timestamp
283		*/
284		public function generateTimestamp()
285		{
286		return floor(microtime(true) / $this->getRefresh());
287		}
288
289		/**
290		* Truncate the given hash down to just what we need
291		*
292		* @param string $hash Hash to truncate
293		* @return string Truncated hash value
294		*/
295		public function truncateHash($hash)
296		{
297		$offset = ord($hash[19]) & 0xf;
298
299		return (
300		((ord($hash[$offset + 0]) & 0x7f) << 24) \|
301		((ord($hash[$offset + 1]) & 0xff) << 16) \|
302		((ord($hash[$offset + 2]) & 0xff) << 8) \|
303		(ord($hash[$offset + 3]) & 0xff)
304		) % pow(10, $this->getCodeLength());
305		}
306
307		/**
308		* Base32 decoding function
309		*
310		* @param string $hash The base32-encoded hash
311		* @throws \InvalidArgumentException When hash is not valid
312		* @return string Binary value of hash
313		*/
314		public function base32_decode($hash)
315		{
316		$lookup = $this->getLookup();
317
318	View Code Duplication	if (preg_match('/^[' . implode('', array_keys($lookup)) . ']+$/', $hash) == false) {
		0 ignored issues – show Bug Best Practice introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It seems like you are loosely comparing `preg_match('/^[' . implo...okup)) . ']+$/', $hash)` of type `integer` to the boolean `false`. If you are specifically checking for 0, consider using something more explicit like `=== 0` instead. Loading history... Duplication introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this This code seems to be duplicated across your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
319		throw new \InvalidArgumentException('Invalid base32 hash!');
320		}
321
322		$hash = strtoupper($hash);
323		$buffer = 0;
324		$length = 0;
325		$binary = '';
326
327		for ($i = 0; $i < strlen($hash); $i++) {
328		$buffer = $buffer << 5;
329		$buffer += $lookup[$hash[$i]];
330		$length += 5;
331
332		if ($length >= 8) {
333		$length -= 8;
334		$binary .= chr(($buffer & (0xFF << $length)) >> $length);
335		}
336		}
337
338		return $binary;
339		}
340
341		/**
342		* Returns a URL to QR code for embedding the QR code
343		*
344		* @param string $name The name
345		* @param string $code The generated code
346		* @return string The URL to the QR code
347		*/
348		public function getQrCodeUrl($name, $code)
349		{
350		$urlencoded = urlencode('otpauth://totp/' . urlencode($name) . '?secret=' . $code);
351		return 'https://chart.googleapis.com/chart?chs=200x200&chld=M\|0&cht=qr&chl=' . $urlencoded;
352		}
353		}
354
355		?>
		0 ignored issues – show Best Practice introduced 2016-12-11 19:54 UTC by Report Bug Copy Issue Report Show Similar Issues like this It is not recommended to use PHP's closing tag `?>` in files other than templates. Using a closing tag in PHP files that only contain PHP code is not recommended as you might accidentally add whitespace after the closing tag which would then be output by PHP. This can cause severe problems, for example headers cannot be sent anymore. A simple precaution is to leave off the closing tag as it is not required, and it also has no negative effects whatsoever. Loading history...

albertlast / SMF2.1

Push — release-2.1 ( aa21c4...7040ad )

Sources/Class-TOTP.php (12 issues)

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