Google2FA::getAlgorithm() - Code Metrics - Inspection of "Merge pull request #138 from KartaviK/feature/opti..." - antonioribeiro/google2fa - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 99a67f...d5b2ba )

by Antonio Carlos

created 2020-04-04 11:25 UTC

Google2FA::getAlgorithm() A

↳ Parent: Google2FA

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	1
c	1
b	0
f	0
dl	0
loc	3
ccs	2
cts	2
cp	1
rs	10
cc	1
nc	1
nop	0
crap	1

<?php

namespace PragmaRX\Google2FA;

use PragmaRX\Google2FA\Support\Base32;
use PragmaRX\Google2FA\Support\QRCode;
use PragmaRX\Google2FA\Support\Constants;
use PragmaRX\Google2FA\Exceptions\InvalidAlgorithmException;
use PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException;

class Google2FA
{
    use QRCode, Base32;

    /**
     * Algorithm.
     *
     * @var string
     */
    protected $algorithm = Constants::SHA1;

    /**
     * Length of the Token generated.
     *
     * @var int
     */
    protected $oneTimePasswordLength = 6;

    /**
     * Interval between key regeneration.
     *
     * @var int
     */
    protected $keyRegeneration = 30;

    /**
     * Secret.
     *
     * @var string
     */
    protected $secret;

    /**
     * Window.
     *
     * @var int
     */
    protected $window = 1; // Keys will be valid for 60 seconds

    /**
     * Find a valid One Time Password.
     *
     * @param string    $secret
     * @param string    $key
     * @param int|null  $window
     * @param int       $startingTimestamp
     * @param int       $timestamp
     * @param int|null  $oldTimestamp
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return bool|int
     */
    public function findValidOTP(
        $secret,
        $key,
        $window,
        $startingTimestamp,
        $timestamp,
        $oldTimestamp = null
    ) {
        for (
            ;
            $startingTimestamp <= $timestamp + $this->getWindow($window);
            $startingTimestamp++
        ) {
            if (
                hash_equals($this->oathTotp($secret, $startingTimestamp), $key)
            ) {
                return is_null($oldTimestamp)
                    ? true
                    : $startingTimestamp;
            }
        }

        return false;
    }

    /**
     * Generate the HMAC OTP
     *
     * @param string $secret
     * @param int $counter
     * @return string
     */
    protected function generateHotp($secret, $counter)
    {
        return hash_hmac(
            $this->getAlgorithm(),
            pack('N*', 0, $counter), // Counter must be 64-bit int
            $secret,
            true
        );
    }

    /**
     * Generate a digit secret key in base32 format.
     *
     * @param int    $length
     * @param string $prefix
     *
     * @throws Exceptions\InvalidCharactersException
     * @throws Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return string
     */
    public function generateSecretKey($length = 16, $prefix = '')
    {
        return $this->generateBase32RandomKey($length, $prefix);
    }

    /**
     * Get the current one time password for a key.
     *
     * @param string $secret
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return string
     */
    public function getCurrentOtp($secret)
    {
        return $this->oathTotp($secret, $this->getTimestamp());
    }

    /**
     * Get the HMAC algorithm.
     *
     * @return string
     */
    public function getAlgorithm()
    {
        return $this->algorithm;
    }

    /**
     * Get key regeneration.
     *
     * @return int
     */
    public function getKeyRegeneration()
    {
        return $this->keyRegeneration;
    }

    /**
     * Get OTP length.
     *
     * @return int
     */
    public function getOneTimePasswordLength()
    {
        return $this->oneTimePasswordLength;
    }

    /**
     * Get secret.
     *
     * @param string|null $secret
     *
     * @return string
     */
    public function getSecret($secret = null)
    {
        return is_null($secret) ? $this->secret : $secret;
    }

    /**
     * Returns the current Unix Timestamp divided by the $keyRegeneration
     * period.
     *
     * @return int
     **/
    public function getTimestamp()
    {
        return (int) floor(microtime(true) / $this->keyRegeneration);
    }

    /**
     * Get a list of valid HMAC algorithms.
     *
     * @return array
     */
    protected function getValidAlgorithms()
    {
        return [
            Constants::SHA1,
            Constants::SHA256,
            Constants::SHA512,
        ];
    }

    /**
     * Get the OTP window.
     *
     * @param null|int $window
     *
     * @return int
     */
    public function getWindow($window = null)
    {
        return is_null($window) ? $this->window : $window;
    }

    /**
     * Make a window based starting timestamp.
     *
     * @param int|null $window
     * @param int $timestamp
     * @param int|null $oldTimestamp
     *
     * @return mixed
     */
    private function makeStartingTimestamp($window, $timestamp, $oldTimestamp = null)
    {
        return is_null($oldTimestamp)
            ? $timestamp - $this->getWindow($window)
            : max($timestamp - $this->getWindow($window), $oldTimestamp + 1);
    }

    /**
     * Get/use a starting timestamp for key verification.
     *
     * @param string|int|null $timestamp
     *
     * @return int
     */
    protected function makeTimestamp($timestamp = null)
    {
        if (is_null($timestamp)) {
            return $this->getTimestamp();
        }

        return (int) $timestamp;
    }

    /**
     * Takes the secret key and the timestamp and returns the one time
     * password.
     *
     * @param string $secret  - Secret key in binary form.
     * @param int    $counter - Timestamp as returned by getTimestamp.
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return string
     */
    public function oathTotp($secret, $counter)
    {
        $secret = $this->base32Decode($this->getSecret($secret));

        if (strlen($secret) < 8) {
            throw new SecretKeyTooShortException();
        }

        return str_pad(
            $this->oathTruncate($this->generateHotp($secret, $counter)),
            $this->getOneTimePasswordLength(),
            '0',
            STR_PAD_LEFT
        );
    }

    /**
     * Extracts the OTP from the SHA1 hash.
     *
     * @param string $hash
     *
     * @return string
     **/
    public function oathTruncate($hash)
    {
        $offset = ord($hash[strlen($hash) - 1]) & 0xf;

        $temp = unpack('N', substr($hash, $offset, 4));

        $temp = $temp[1] & 0x7fffffff;

        return substr(
            (string) $temp,
            -$this->getOneTimePasswordLength()
        );
    }

    /**
     * Remove invalid chars from a base 32 string.
     *
     * @param string $string
     *
     * @return string|null
     */
    public function removeInvalidChars($string)
    {
        return preg_replace(
            '/[^' . Constants::VALID_FOR_B32 . ']/',
            '',
            $string
        );
    }

    /**
     * Setter for the enforce Google Authenticator compatibility property.
     *
     * @param mixed $enforceGoogleAuthenticatorCompatibility
     *
     * @return $this
     */
    public function setEnforceGoogleAuthenticatorCompatibility(
        $enforceGoogleAuthenticatorCompatibility
    ) {
        $this->enforceGoogleAuthenticatorCompatibility = $enforceGoogleAuthenticatorCompatibility;

        return $this;
    }

    /**
     * Set the HMAC hashing algorithm.
     *
     * @param mixed $algorithm
     * @return \PragmaRX\Google2FA\Google2FA
     */
    public function setAlgorithm($algorithm)
    {
        // Default to SHA1 HMAC algorithm
        if (! in_array($algorithm, $this->getValidAlgorithms())) {
            throw new InvalidAlgorithmException();
        }

        $this->algorithm = $algorithm;

        return $this;
    }

    /**
     * Set key regeneration.
     *
     * @param mixed $keyRegeneration
     */
    public function setKeyRegeneration($keyRegeneration)
    {
        $this->keyRegeneration = $keyRegeneration;
    }

    /**
     * Set OTP length.
     *
     * @param mixed $oneTimePasswordLength
     */
    public function setOneTimePasswordLength($oneTimePasswordLength)
    {
        $this->oneTimePasswordLength = $oneTimePasswordLength;
    }

    /**
     * Set secret.
     *
     * @param mixed $secret
     */
    public function setSecret($secret)
    {
        $this->secret = $secret;
    }

    /**
     * Set the OTP window.
     *
     * @param mixed $window
     */
    public function setWindow($window)
    {
        $this->window = $window;
    }

    /**
     * Verifies a user inputted key against the current timestamp. Checks $window
     * keys either side of the timestamp.
     *
     * @param string        $key          - User specified key
     * @param string        $secret
     * @param null|int      $window
     * @param null|int      $timestamp
     * @param null|int      $oldTimestamp
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return bool|int
     */
    public function verify(
        $key,
        $secret,
        $window = null,
        $timestamp = null,
        $oldTimestamp = null
    ) {
        return $this->verifyKey(
            $secret,
            $key,
            $window,
            $timestamp,
            $oldTimestamp
        );
    }

    /**
     * Verifies a user inputted key against the current timestamp. Checks $window
     * keys either side of the timestamp.
     *
     * @param string    $secret
     * @param string    $key          - User specified key
     * @param int|null  $window
     * @param null|int  $timestamp
     * @param null|int  $oldTimestamp
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return bool|int
     */
    public function verifyKey(
        $secret,
        $key,
        $window = null,
        $timestamp = null,
        $oldTimestamp = null
    ) {
        $timestamp = $this->makeTimestamp($timestamp);

        return $this->findValidOTP(
            $secret,
            $key,
            $window,
            $this->makeStartingTimestamp($window, $timestamp, $oldTimestamp),
            $timestamp,
            $oldTimestamp
        );
    }

    /**
     * Verifies a user inputted key against the current timestamp. Checks $window
     * keys either side of the timestamp, but ensures that the given key is newer than
     * the given oldTimestamp. Useful if you need to ensure that a single key cannot
     * be used twice.
     *
     * @param string   $secret
     * @param string   $key          - User specified key
     * @param int      $oldTimestamp - The timestamp from the last verified key
     * @param int|null $window
     * @param int|null $timestamp
     *
     * @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
     * @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
     * @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
     *
     * @return bool|int - false (not verified) or the timestamp of the verified key
     */
    public function verifyKeyNewer(
        $secret,
        $key,
        $oldTimestamp,
        $window = null,
        $timestamp = null
    ) {
        return $this->verifyKey(
            $secret,
            $key,
            $window,
            $timestamp,
            $oldTimestamp
        );
    }
}


1		<?php
2
3		namespace PragmaRX\Google2FA;
4
5		use PragmaRX\Google2FA\Support\Base32;
6		use PragmaRX\Google2FA\Support\QRCode;
7		use PragmaRX\Google2FA\Support\Constants;
8		use PragmaRX\Google2FA\Exceptions\InvalidAlgorithmException;
9		use PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException;
10
11		class Google2FA
12		{
13		use QRCode, Base32;
14
15		/**
16		* Algorithm.
17		*
18		* @var string
19		*/
20		protected $algorithm = Constants::SHA1;
21
22		/**
23		* Length of the Token generated.
24		*
25		* @var int
26		*/
27		protected $oneTimePasswordLength = 6;
28
29		/**
30		* Interval between key regeneration.
31		*
32		* @var int
33		*/
34		protected $keyRegeneration = 30;
35
36		/**
37		* Secret.
38		*
39		* @var string
40		*/
41		protected $secret;
42
43		/**
44		* Window.
45		*
46		* @var int
47		*/
48		protected $window = 1; // Keys will be valid for 60 seconds
49
50		/**
51		* Find a valid One Time Password.
52		*
53		* @param string $secret
54		* @param string $key
55		* @param int\|null $window
56		* @param int $startingTimestamp
57		* @param int $timestamp
58		* @param int\|null $oldTimestamp
59		*
60		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
61		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
62		* @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
63		*
64		* @return bool\|int
65		*/
66	14	public function findValidOTP(
67		$secret,
68		$key,
69		$window,
70		$startingTimestamp,
71		$timestamp,
72		$oldTimestamp = null
73		) {
74		for (
75		;
76	14	$startingTimestamp <= $timestamp + $this->getWindow($window);
77		$startingTimestamp++
78		) {
79		if (
80	14	hash_equals($this->oathTotp($secret, $startingTimestamp), $key)
81		) {
82	9	return is_null($oldTimestamp)
83	9	? true
84	9	: $startingTimestamp;
85		}
86		}
87
88	8	return false;
89		}
90
91		/**
92		* Generate the HMAC OTP
93		*
94		* @param string $secret
95		* @param int $counter
96		* @return string
97		*/
98	11	protected function generateHotp($secret, $counter)
99		{
100	11	return hash_hmac(
101	11	$this->getAlgorithm(),
102	11	pack('N*', 0, $counter), // Counter must be 64-bit int
103		$secret,
104	11	true
105		);
106		}
107
108		/**
109		* Generate a digit secret key in base32 format.
110		*
111		* @param int $length
112		* @param string $prefix
113		*
114		* @throws Exceptions\InvalidCharactersException
115		* @throws Exceptions\IncompatibleWithGoogleAuthenticatorException
116		*
117		* @return string
118		*/
119	5	public function generateSecretKey($length = 16, $prefix = '')
120		{
121	5	return $this->generateBase32RandomKey($length, $prefix);
122		}
123
124		/**
125		* Get the current one time password for a key.
126		*
127		* @param string $secret
128		*
129		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
130		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
131		* @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
132		*
133		* @return string
134		*/
135	2	public function getCurrentOtp($secret)
136		{
137	2	return $this->oathTotp($secret, $this->getTimestamp());
138		}
139
140		/**
141		* Get the HMAC algorithm.
142		*
143		* @return string
144		*/
145	12	public function getAlgorithm()
146		{
147	12	return $this->algorithm;
148		}
149
150		/**
151		* Get key regeneration.
152		*
153		* @return int
154		*/
155	1	public function getKeyRegeneration()
156		{
157	1	return $this->keyRegeneration;
158		}
159
160		/**
161		* Get OTP length.
162		*
163		* @return int
164		*/
165	12	public function getOneTimePasswordLength()
166		{
167	12	return $this->oneTimePasswordLength;
168		}
169
170		/**
171		* Get secret.
172		*
173		* @param string\|null $secret
174		*
175		* @return string
176		*/
177	16	public function getSecret($secret = null)
178		{
179	16	return is_null($secret) ? $this->secret : $secret;
180		}
181
182		/**
183		* Returns the current Unix Timestamp divided by the $keyRegeneration
184		* period.
185		*
186		* @return int
187		**/
188	4	public function getTimestamp()
189		{
190	4	return (int) floor(microtime(true) / $this->keyRegeneration);
191		}
192
193		/**
194		* Get a list of valid HMAC algorithms.
195		*
196		* @return array
197		*/
198	6	protected function getValidAlgorithms()
199		{
200		return [
201	6	Constants::SHA1,
202	6	Constants::SHA256,
203	6	Constants::SHA512,
204		];
205		}
206
207		/**
208		* Get the OTP window.
209		*
210		* @param null\|int $window
211		*
212		* @return int
213		*/
214	14	public function getWindow($window = null)
215		{
216	14	return is_null($window) ? $this->window : $window;
217		}
218
219		/**
220		* Make a window based starting timestamp.
221		*
222		* @param int\|null $window
223		* @param int $timestamp
224		* @param int\|null $oldTimestamp
225		*
226		* @return mixed
227		*/
228	14	private function makeStartingTimestamp($window, $timestamp, $oldTimestamp = null)
229		{
230	14	return is_null($oldTimestamp)
231	14	? $timestamp - $this->getWindow($window)
232	14	: max($timestamp - $this->getWindow($window), $oldTimestamp + 1);
233		}
234
235		/**
236		* Get/use a starting timestamp for key verification.
237		*
238		* @param string\|int\|null $timestamp
239		*
240		* @return int
241		*/
242	14	protected function makeTimestamp($timestamp = null)
243		{
244	14	if (is_null($timestamp)) {
245	1	return $this->getTimestamp();
246		}
247
248	14	return (int) $timestamp;
249		}
250
251		/**
252		* Takes the secret key and the timestamp and returns the one time
253		* password.
254		*
255		* @param string $secret - Secret key in binary form.
256		* @param int $counter - Timestamp as returned by getTimestamp.
257		*
258		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
259		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
260		* @throws Exceptions\IncompatibleWithGoogleAuthenticatorException
261		*
262		* @return string
263		*/
264	16	public function oathTotp($secret, $counter)
265		{
266	16	$secret = $this->base32Decode($this->getSecret($secret));
267
268	11	if (strlen($secret) < 8) {
269		throw new SecretKeyTooShortException();
270		}
271
272	11	return str_pad(
273	11	$this->oathTruncate($this->generateHotp($secret, $counter)),
274	11	$this->getOneTimePasswordLength(),
275	11	'0',
276	11	STR_PAD_LEFT
277		);
278		}
279
280		/**
281		* Extracts the OTP from the SHA1 hash.
282		*
283		* @param string $hash
284		*
285		* @return string
286		**/
287	11	public function oathTruncate($hash)
288		{
289	11	$offset = ord($hash[strlen($hash) - 1]) & 0xf;
290
291	11	$temp = unpack('N', substr($hash, $offset, 4));
292
293	11	$temp = $temp[1] & 0x7fffffff;
294
295	11	return substr(
296	11	(string) $temp,
297	11	-$this->getOneTimePasswordLength()
298		);
299		}
300
301		/**
302		* Remove invalid chars from a base 32 string.
303		*
304		* @param string $string
305		*
306		* @return string\|null
307		*/
308	1	public function removeInvalidChars($string)
309		{
310	1	return preg_replace(
311	1	'/[^' . Constants::VALID_FOR_B32 . ']/',
312	1	'',
313		$string
314		);
315		}
316
317		/**
318		* Setter for the enforce Google Authenticator compatibility property.
319		*
320		* @param mixed $enforceGoogleAuthenticatorCompatibility
321		*
322		* @return $this
323		*/
324	9	public function setEnforceGoogleAuthenticatorCompatibility(
325		$enforceGoogleAuthenticatorCompatibility
326		) {
327	9	$this->enforceGoogleAuthenticatorCompatibility = $enforceGoogleAuthenticatorCompatibility;
328
329	9	return $this;
330		}
331
332		/**
333		* Set the HMAC hashing algorithm.
334		*
335		* @param mixed $algorithm
336		* @return \PragmaRX\Google2FA\Google2FA
337		*/
338	6	public function setAlgorithm($algorithm)
339		{
340		// Default to SHA1 HMAC algorithm
341	6	if (! in_array($algorithm, $this->getValidAlgorithms())) {
342	1	throw new InvalidAlgorithmException();
343		}
344
345	5	$this->algorithm = $algorithm;
346
347	5	return $this;
348		}
349
350		/**
351		* Set key regeneration.
352		*
353		* @param mixed $keyRegeneration
354		*/
355	1	public function setKeyRegeneration($keyRegeneration)
356		{
357	1	$this->keyRegeneration = $keyRegeneration;
358	1	}
359
360		/**
361		* Set OTP length.
362		*
363		* @param mixed $oneTimePasswordLength
364		*/
365	2	public function setOneTimePasswordLength($oneTimePasswordLength)
366		{
367	2	$this->oneTimePasswordLength = $oneTimePasswordLength;
368	2	}
369
370		/**
371		* Set secret.
372		*
373		* @param mixed $secret
374		*/
375	1	public function setSecret($secret)
376		{
377	1	$this->secret = $secret;
378	1	}
379
380		/**
381		* Set the OTP window.
382		*
383		* @param mixed $window
384		*/
385	3	public function setWindow($window)
386		{
387	3	$this->window = $window;
388	3	}
389
390		/**
391		* Verifies a user inputted key against the current timestamp. Checks $window
392		* keys either side of the timestamp.
393		*
394		* @param string $key - User specified key
395		* @param string $secret
396		* @param null\|int $window
397		* @param null\|int $timestamp
398		* @param null\|int $oldTimestamp
399		*
400		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
401		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
402		* @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
403		*
404		* @return bool\|int
405		*/
406	1	public function verify(
407		$key,
408		$secret,
409		$window = null,
410		$timestamp = null,
411		$oldTimestamp = null
412		) {
413	1	return $this->verifyKey(
414	1	$secret,
415		$key,
416		$window,
417		$timestamp,
418		$oldTimestamp
419		);
420		}
421
422		/**
423		* Verifies a user inputted key against the current timestamp. Checks $window
424		* keys either side of the timestamp.
425		*
426		* @param string $secret
427		* @param string $key - User specified key
428		* @param int\|null $window
429		* @param null\|int $timestamp
430		* @param null\|int $oldTimestamp
431		*
432		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
433		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
434		* @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
435		*
436		* @return bool\|int
437		*/
438	14	public function verifyKey(
439		$secret,
440		$key,
441		$window = null,
442		$timestamp = null,
443		$oldTimestamp = null
444		) {
445	14	$timestamp = $this->makeTimestamp($timestamp);
446
447	14	return $this->findValidOTP(
448	14	$secret,
449		$key,
450		$window,
451	14	$this->makeStartingTimestamp($window, $timestamp, $oldTimestamp),
452		$timestamp,
453		$oldTimestamp
454		);
455		}
456
457		/**
458		* Verifies a user inputted key against the current timestamp. Checks $window
459		* keys either side of the timestamp, but ensures that the given key is newer than
460		* the given oldTimestamp. Useful if you need to ensure that a single key cannot
461		* be used twice.
462		*
463		* @param string $secret
464		* @param string $key - User specified key
465		* @param int $oldTimestamp - The timestamp from the last verified key
466		* @param int\|null $window
467		* @param int\|null $timestamp
468		*
469		* @throws \PragmaRX\Google2FA\Exceptions\SecretKeyTooShortException
470		* @throws \PragmaRX\Google2FA\Exceptions\InvalidCharactersException
471		* @throws \PragmaRX\Google2FA\Exceptions\IncompatibleWithGoogleAuthenticatorException
472		*
473		* @return bool\|int - false (not verified) or the timestamp of the verified key
474		*/
475	3	public function verifyKeyNewer(
476		$secret,
477		$key,
478		$oldTimestamp,
479		$window = null,
480		$timestamp = null
481		) {
482	3	return $this->verifyKey(
483	3	$secret,
484		$key,
485		$window,
486		$timestamp,
487		$oldTimestamp
488		);
489		}
490		}
491

antonioribeiro / google2fa

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Google2FA::getAlgorithm() A

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