* switch to composer for qrcode and otp dependencies

* move most OTP-related stuff into userhelper
* remove old phpqrcode and otphp libraries

18 files changed, 1141 insertions, 0 deletions

diff --git a/vendor/spomky-labs/otphp/.github/CONTRIBUTING.md b/vendor/spomky-labs/otphp/.github/CONTRIBUTING.md
new file mode 100644
index 000000000..871735ad1
--- /dev/null
+++ b/vendor/spomky-labs/otphp/.github/CONTRIBUTING.md
@@ -0,0 +1,25 @@
+# Contributing
+
+First of all, **thank you** for contributing.
+
+Bugs or feature requests can be posted online on the GitHub issues section of the project.
+
+Few rules to ease code reviews and merges:
+
+- You MUST follow the [PSR-1](http://www.php-fig.org/psr/psr-1/), [PSR-2](http://www.php-fig.org/psr/psr-2/) and [PSR-4](http://www.php-fig.org/psr/psr-4/) coding standards.
+- You MUST run the test suite.
+- You MUST write (or update) unit tests when bugs are fixed or features are added.
+- You SHOULD write documentation.
+
+We use [Git-Flow](http://jeffkreeftmeijer.com/2010/why-arent-you-using-git-flow/) to automate our git branching workflow.
+
+To contribute use [Pull Requests](https://help.github.com/articles/using-pull-requests), please, write commit messages that make sense, and rebase your branch before submitting your PR.
+
+May be asked to squash your commits too. This is used to "clean" your Pull Request before merging it, avoiding commits such as fix tests, fix 2, fix 3, etc.
+
+Run test suite
+------------
+
+* install composer: `curl -s http://getcomposer.org/installer | php`
+* install dependencies: `php composer.phar install`
+* run tests: `vendor/bin/phpunit`
diff --git a/vendor/spomky-labs/otphp/.github/ISSUE_TEMPLATE.md b/vendor/spomky-labs/otphp/.github/ISSUE_TEMPLATE.md
new file mode 100644
index 000000000..2ceb8da6a
--- /dev/null
+++ b/vendor/spomky-labs/otphp/.github/ISSUE_TEMPLATE.md
@@ -0,0 +1,16 @@
+| Q                    | A
+| -------------------- | -----
+| Bug report?          | yes/no
+| Feature request?     | yes/no
+| BC Break report?     | yes/no
+| RFC? / Specification | yes/no
+| Library version      | x.y(.z)
+
+<!--
+Fill in this template according to your issue.
+Otherwise, replace this comment by the description of your issue.
+
+Please consider the following requirements
+* You MUST never send security issues here. If you think that your issue is a security one then contact Spomky in private at https://gitter.im/Spomky/
+* You should not post many lines of source code or console logs. Small inputs (approx 5 lines) are acceptable otherwize you should use a third party service (e.g. Pastebin, Chop...).
+-->
diff --git a/vendor/spomky-labs/otphp/.github/PULL_REQUEST_TEMPLATE.md b/vendor/spomky-labs/otphp/.github/PULL_REQUEST_TEMPLATE.md
new file mode 100644
index 000000000..acd0be9fc
--- /dev/null
+++ b/vendor/spomky-labs/otphp/.github/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,21 @@
+| Q             | A
+| ------------- | ---
+| Branch?       | master
+| Bug fix?      | yes/no
+| New feature?  | yes/no
+| BC breaks?    | yes/no
+| Deprecations? | yes/no
+| Tests pass?   | yes/no
+| Fixed tickets | #... <!-- #-prefixed issue number(s), if any -->
+| License       | MIT
+| Tests added   |  <!--highly recommended for new features-->
+| Doc PR        |  <!--highly recommended for new features-->
+
+<!--
+Fill in this template according to the PR you're about to submit.
+Replace this comment by a description of what your PR is solving.
+
+Please consider the following requirement:
+* Modification of existing tests should be avoided unless deemed necessary.
+* You MUST never open a PR related to a security issue. Contact Spomky in private at https://gitter.im/Spomky/
+-->
diff --git a/vendor/spomky-labs/otphp/.github/stale.yml b/vendor/spomky-labs/otphp/.github/stale.yml
new file mode 100644
index 000000000..dc90e5a1c
--- /dev/null
+++ b/vendor/spomky-labs/otphp/.github/stale.yml
@@ -0,0 +1,17 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking an issue as stale
+staleLabel: wontfix
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. Thank you
+  for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false
diff --git a/vendor/spomky-labs/otphp/.php_cs.dist b/vendor/spomky-labs/otphp/.php_cs.dist
new file mode 100644
index 000000000..7410dff65
--- /dev/null
+++ b/vendor/spomky-labs/otphp/.php_cs.dist
@@ -0,0 +1,61 @@
+<?php
+
+$header = 'The MIT License (MIT)
+
+Copyright (c) 2014-2019 Spomky-Labs
+
+This software may be modified and distributed under the terms
+of the MIT license.  See the LICENSE file for details.';
+
+$finder = PhpCsFixer\Finder::create()
+    ->in(__DIR__.'/src')
+    ->in(__DIR__.'/tests')
+;
+
+return PhpCsFixer\Config::create()
+    ->setRules([
+        '@PSR1' => true,
+        '@PSR2' => true,
+        '@Symfony' => true,
+        '@DoctrineAnnotation' => true,
+        '@PHP70Migration' => true,
+        '@PHP71Migration' => true,
+        'strict_param' => true,
+        'strict_comparison' => true,
+        'array_syntax' => ['syntax' => 'short'],
+        'array_indentation' => true,
+        'ordered_imports' => true,
+        'protected_to_private' => true,
+        'declare_strict_types' => true,
+        'native_function_invocation' => [
+            'include' => ['@compiler_optimized'],
+            'scope' => 'namespaced',
+        ],
+        'mb_str_functions' => true,
+        'method_chaining_indentation' => true,
+        'linebreak_after_opening_tag' => true,
+        'combine_consecutive_issets' => true,
+        'combine_consecutive_unsets' => true,
+        'compact_nullable_typehint' => true,
+        'no_superfluous_phpdoc_tags' => true,
+        'no_superfluous_elseif' => true,
+        'phpdoc_trim_consecutive_blank_line_separation' => true,
+        'phpdoc_order' => true,
+        'pow_to_exponentiation' => true,
+        'simplified_null_return' => true,
+        'header_comment' => [
+            'header' => $header,
+        ],
+        'align_multiline_comment' => [
+            'comment_type' => 'all_multiline',
+        ],
+        'php_unit_test_annotation' => [
+            'case' => 'snake',
+            'style' => 'annotation',
+        ],
+        'php_unit_test_case_static_method_calls' => true,
+    ])
+    ->setRiskyAllowed(true)
+    ->setUsingCache(true)
+    ->setFinder($finder)
+    ;
diff --git a/vendor/spomky-labs/otphp/CODE_OF_CONDUCT.md b/vendor/spomky-labs/otphp/CODE_OF_CONDUCT.md
new file mode 100644
index 000000000..4ec12c72b
--- /dev/null
+++ b/vendor/spomky-labs/otphp/CODE_OF_CONDUCT.md
@@ -0,0 +1,46 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at [email protected]. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/
diff --git a/vendor/spomky-labs/otphp/LICENSE b/vendor/spomky-labs/otphp/LICENSE
new file mode 100644
index 000000000..e6a673e34
--- /dev/null
+++ b/vendor/spomky-labs/otphp/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2016 Florent Morselli
+
+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.
diff --git a/vendor/spomky-labs/otphp/composer.json b/vendor/spomky-labs/otphp/composer.json
new file mode 100644
index 000000000..8979e8f06
--- /dev/null
+++ b/vendor/spomky-labs/otphp/composer.json
@@ -0,0 +1,50 @@
+{
+    "name": "spomky-labs/otphp",
+    "type": "library",
+    "description": "A PHP library for generating one time passwords according to RFC 4226 (HOTP Algorithm) and the RFC 6238 (TOTP Algorithm) and compatible with Google Authenticator",
+    "license": "MIT",
+    "keywords": ["otp", "hotp", "totp", "RFC 4226", "RFC 6238", "Google Authenticator", "FreeOTP"],
+    "homepage": "https://github.com/Spomky-Labs/otphp",
+    "authors": [
+        {
+            "name": "Florent Morselli",
+            "homepage": "https://github.com/Spomky"
+        },
+        {
+            "name": "All contributors",
+            "homepage": "https://github.com/Spomky-Labs/otphp/contributors"
+        }
+    ],
+    "require": {
+        "php": "^7.2|^8.0",
+        "ext-mbstring": "*",
+        "paragonie/constant_time_encoding": "^2.0",
+        "beberlei/assert": "^3.0",
+        "thecodingmachine/safe": "^0.1.14|^1.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^8.0",
+        "php-coveralls/php-coveralls": "^2.0",
+        "phpstan/phpstan": "^0.12",
+        "phpstan/phpstan-beberlei-assert": "^0.12",
+        "phpstan/phpstan-deprecation-rules": "^0.12",
+        "phpstan/phpstan-phpunit": "^0.12",
+        "phpstan/phpstan-strict-rules": "^0.12",
+        "thecodingmachine/phpstan-safe-rule": "^1.0"
+    },
+    "suggest": {
+    },
+    "autoload": {
+        "psr-4": { "OTPHP\\": "src/" }
+    },
+    "autoload-dev": {
+        "psr-4": { "OTPHP\\Test\\": "tests/" }
+    },
+    "extra": {
+        "branch-alias": {
+            "v10.0": "10.0.x-dev",
+            "v9.0": "9.0.x-dev",
+            "v8.3": "8.3.x-dev"
+        }
+    }
+}
diff --git a/vendor/spomky-labs/otphp/phpstan.neon b/vendor/spomky-labs/otphp/phpstan.neon
new file mode 100644
index 000000000..c9be89623
--- /dev/null
+++ b/vendor/spomky-labs/otphp/phpstan.neon
@@ -0,0 +1,13 @@
+parameters:
+    level: 7
+    paths:
+        - src
+        - tests
+    ignoreErrors:
+        - '#Variable property access on \$this\(OTPHP\\OTP\)\.#'
+includes:
+    - vendor/phpstan/phpstan-strict-rules/rules.neon
+    - vendor/phpstan/phpstan-phpunit/extension.neon
+    - vendor/phpstan/phpstan-deprecation-rules/rules.neon
+    - vendor/thecodingmachine/phpstan-safe-rule/phpstan-safe-rule.neon
+    - vendor/phpstan/phpstan-beberlei-assert/extension.neon
diff --git a/vendor/spomky-labs/otphp/src/Factory.php b/vendor/spomky-labs/otphp/src/Factory.php
new file mode 100644
index 000000000..70df63945
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/Factory.php
@@ -0,0 +1,115 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+use Assert\Assertion;
+use InvalidArgumentException;
+use function Safe\parse_url;
+use function Safe\sprintf;
+use Throwable;
+
+/**
+ * This class is used to load OTP object from a provisioning Uri.
+ */
+final class Factory implements FactoryInterface
+{
+    public static function loadFromProvisioningUri(string $uri): OTPInterface
+    {
+        try {
+            $parsed_url = parse_url($uri);
+        } catch (Throwable $throwable) {
+            throw new InvalidArgumentException('Not a valid OTP provisioning URI', $throwable->getCode(), $throwable);
+        }
+        Assertion::isArray($parsed_url, 'Not a valid OTP provisioning URI');
+        self::checkData($parsed_url);
+
+        $otp = self::createOTP($parsed_url);
+
+        self::populateOTP($otp, $parsed_url);
+
+        return $otp;
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     */
+    private static function populateParameters(OTPInterface &$otp, array $data): void
+    {
+        foreach ($data['query'] as $key => $value) {
+            $otp->setParameter($key, $value);
+        }
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     */
+    private static function populateOTP(OTPInterface &$otp, array $data): void
+    {
+        self::populateParameters($otp, $data);
+        $result = explode(':', rawurldecode(mb_substr($data['path'], 1)));
+
+        if (2 > \count($result)) {
+            $otp->setIssuerIncludedAsParameter(false);
+
+            return;
+        }
+
+        if (null !== $otp->getIssuer()) {
+            Assertion::eq($result[0], $otp->getIssuer(), 'Invalid OTP: invalid issuer in parameter');
+            $otp->setIssuerIncludedAsParameter(true);
+        }
+        $otp->setIssuer($result[0]);
+    }
+
+    /**
+     * @param array<string, mixed> $data
+     */
+    private static function checkData(array &$data): void
+    {
+        foreach (['scheme', 'host', 'path', 'query'] as $key) {
+            Assertion::keyExists($data, $key, 'Not a valid OTP provisioning URI');
+        }
+        Assertion::eq('otpauth', $data['scheme'], 'Not a valid OTP provisioning URI');
+        parse_str($data['query'], $data['query']);
+        Assertion::keyExists($data['query'], 'secret', 'Not a valid OTP provisioning URI');
+    }
+
+    /**
+     * @param array<string, mixed> $parsed_url
+     */
+    private static function createOTP(array $parsed_url): OTPInterface
+    {
+        switch ($parsed_url['host']) {
+            case 'totp':
+                $totp = TOTP::create($parsed_url['query']['secret']);
+                $totp->setLabel(self::getLabel($parsed_url['path']));
+
+                return $totp;
+            case 'hotp':
+                $hotp = HOTP::create($parsed_url['query']['secret']);
+                $hotp->setLabel(self::getLabel($parsed_url['path']));
+
+                return $hotp;
+            default:
+                throw new InvalidArgumentException(sprintf('Unsupported "%s" OTP type', $parsed_url['host']));
+        }
+    }
+
+    private static function getLabel(string $data): string
+    {
+        $result = explode(':', rawurldecode(mb_substr($data, 1)));
+
+        return 2 === \count($result) ? $result[1] : $result[0];
+    }
+}
diff --git a/vendor/spomky-labs/otphp/src/FactoryInterface.php b/vendor/spomky-labs/otphp/src/FactoryInterface.php
new file mode 100644
index 000000000..00acc2d04
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/FactoryInterface.php
@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+interface FactoryInterface
+{
+    /**
+     * This method is the unique public method of the class.
+     * It can load a provisioning Uri and convert it into an OTP object.
+     */
+    public static function loadFromProvisioningUri(string $uri): OTPInterface;
+}
diff --git a/vendor/spomky-labs/otphp/src/HOTP.php b/vendor/spomky-labs/otphp/src/HOTP.php
new file mode 100644
index 000000000..a2f4a2395
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/HOTP.php
@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+use Assert\Assertion;
+
+final class HOTP extends OTP implements HOTPInterface
+{
+    protected function __construct(?string $secret, int $counter, string $digest, int $digits)
+    {
+        parent::__construct($secret, $digest, $digits);
+        $this->setCounter($counter);
+    }
+
+    public static function create(?string $secret = null, int $counter = 0, string $digest = 'sha1', int $digits = 6): HOTPInterface
+    {
+        return new self($secret, $counter, $digest, $digits);
+    }
+
+    protected function setCounter(int $counter): void
+    {
+        $this->setParameter('counter', $counter);
+    }
+
+    public function getCounter(): int
+    {
+        return $this->getParameter('counter');
+    }
+
+    private function updateCounter(int $counter): void
+    {
+        $this->setCounter($counter);
+    }
+
+    public function getProvisioningUri(): string
+    {
+        return $this->generateURI('hotp', ['counter' => $this->getCounter()]);
+    }
+
+    /**
+     * If the counter is not provided, the OTP is verified at the actual counter.
+     */
+    public function verify(string $otp, ?int $counter = null, ?int $window = null): bool
+    {
+        Assertion::greaterOrEqualThan($counter, 0, 'The counter must be at least 0.');
+
+        if (null === $counter) {
+            $counter = $this->getCounter();
+        } elseif ($counter < $this->getCounter()) {
+            return false;
+        }
+
+        return $this->verifyOtpWithWindow($otp, $counter, $window);
+    }
+
+    private function getWindow(?int $window): int
+    {
+        return abs($window ?? 0);
+    }
+
+    private function verifyOtpWithWindow(string $otp, int $counter, ?int $window): bool
+    {
+        $window = $this->getWindow($window);
+
+        for ($i = $counter; $i <= $counter + $window; ++$i) {
+            if ($this->compareOTP($this->at($i), $otp)) {
+                $this->updateCounter($i + 1);
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    protected function getParameterMap(): array
+    {
+        $v = array_merge(
+            parent::getParameterMap(),
+            ['counter' => function ($value): int {
+                Assertion::greaterOrEqualThan((int) $value, 0, 'Counter must be at least 0.');
+
+                return (int) $value;
+            }]
+        );
+
+        return $v;
+    }
+}
diff --git a/vendor/spomky-labs/otphp/src/HOTPInterface.php b/vendor/spomky-labs/otphp/src/HOTPInterface.php
new file mode 100644
index 000000000..336ce1055
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/HOTPInterface.php
@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+interface HOTPInterface extends OTPInterface
+{
+    /**
+     * The initial counter (a positive integer).
+     */
+    public function getCounter(): int;
+
+    /**
+     * Create a new TOTP object.
+     *
+     * If the secret is null, a random 64 bytes secret will be generated.
+     */
+    public static function create(?string $secret = null, int $counter = 0, string $digest = 'sha1', int $digits = 6): self;
+}
diff --git a/vendor/spomky-labs/otphp/src/OTP.php b/vendor/spomky-labs/otphp/src/OTP.php
new file mode 100644
index 000000000..932bcf97e
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/OTP.php
@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+use Assert\Assertion;
+use ParagonIE\ConstantTime\Base32;
+use RuntimeException;
+use function Safe\ksort;
+use function Safe\sprintf;
+
+abstract class OTP implements OTPInterface
+{
+    use ParameterTrait;
+
+    protected function __construct(?string $secret, string $digest, int $digits)
+    {
+        $this->setSecret($secret);
+        $this->setDigest($digest);
+        $this->setDigits($digits);
+    }
+
+    public function getQrCodeUri(string $uri, string $placeholder): string
+    {
+        $provisioning_uri = urlencode($this->getProvisioningUri());
+
+        return str_replace($placeholder, $provisioning_uri, $uri);
+    }
+
+    /**
+     * The OTP at the specified input.
+     */
+    protected function generateOTP(int $input): string
+    {
+        $hash = hash_hmac($this->getDigest(), $this->intToByteString($input), $this->getDecodedSecret(), true);
+
+        $hmac = array_values(unpack('C*', $hash));
+
+        $offset = ($hmac[\count($hmac) - 1] & 0xF);
+        $code = ($hmac[$offset + 0] & 0x7F) << 24 | ($hmac[$offset + 1] & 0xFF) << 16 | ($hmac[$offset + 2] & 0xFF) << 8 | ($hmac[$offset + 3] & 0xFF);
+        $otp = $code % (10 ** $this->getDigits());
+
+        return str_pad((string) $otp, $this->getDigits(), '0', STR_PAD_LEFT);
+    }
+
+    public function at(int $timestamp): string
+    {
+        return $this->generateOTP($timestamp);
+    }
+
+    /**
+     * @param array<string, mixed> $options
+     */
+    protected function filterOptions(array &$options): void
+    {
+        foreach (['algorithm' => 'sha1', 'period' => 30, 'digits' => 6] as $key => $default) {
+            if (isset($options[$key]) && $default === $options[$key]) {
+                unset($options[$key]);
+            }
+        }
+
+        ksort($options);
+    }
+
+    /**
+     * @param array<string, mixed> $options
+     */
+    protected function generateURI(string $type, array $options): string
+    {
+        $label = $this->getLabel();
+        Assertion::string($label, 'The label is not set.');
+        Assertion::false($this->hasColon($label), 'Label must not contain a colon.');
+        $options = array_merge($options, $this->getParameters());
+        $this->filterOptions($options);
+        $params = str_replace(['+', '%7E'], ['%20', '~'], http_build_query($options));
+
+        return sprintf('otpauth://%s/%s?%s', $type, rawurlencode((null !== $this->getIssuer() ? $this->getIssuer().':' : '').$label), $params);
+    }
+
+    private function getDecodedSecret(): string
+    {
+        try {
+            return Base32::decodeUpper($this->getSecret());
+        } catch (\Exception $e) {
+            throw new RuntimeException('Unable to decode the secret. Is it correctly base32 encoded?');
+        }
+    }
+
+    private function intToByteString(int $int): string
+    {
+        $result = [];
+        while (0 !== $int) {
+            $result[] = \chr($int & 0xFF);
+            $int >>= 8;
+        }
+
+        return str_pad(implode(array_reverse($result)), 8, "\000", STR_PAD_LEFT);
+    }
+
+    protected function compareOTP(string $safe, string $user): bool
+    {
+        return hash_equals($safe, $user);
+    }
+}
diff --git a/vendor/spomky-labs/otphp/src/OTPInterface.php b/vendor/spomky-labs/otphp/src/OTPInterface.php
new file mode 100644
index 000000000..66e163d5d
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/OTPInterface.php
@@ -0,0 +1,97 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+interface OTPInterface
+{
+    /**
+     * @return string Return the OTP at the specified timestamp
+     */
+    public function at(int $timestamp): string;
+
+    /**
+     * Verify that the OTP is valid with the specified input.
+     * If no input is provided, the input is set to a default value or false is returned.
+     */
+    public function verify(string $otp, ?int $input = null, ?int $window = null): bool;
+
+    /**
+     * @return string The secret of the OTP
+     */
+    public function getSecret(): string;
+
+    /**
+     * @param string $label The label of the OTP
+     */
+    public function setLabel(string $label): void;
+
+    /**
+     * @return string|null The label of the OTP
+     */
+    public function getLabel(): ?string;
+
+    /**
+     * @return string|null The issuer
+     */
+    public function getIssuer(): ?string;
+
+    public function setIssuer(string $issuer): void;
+
+    /**
+     * @return bool If true, the issuer will be added as a parameter in the provisioning URI
+     */
+    public function isIssuerIncludedAsParameter(): bool;
+
+    public function setIssuerIncludedAsParameter(bool $issuer_included_as_parameter): void;
+
+    /**
+     * @return int Number of digits in the OTP
+     */
+    public function getDigits(): int;
+
+    /**
+     * @return string Digest algorithm used to calculate the OTP. Possible values are 'md5', 'sha1', 'sha256' and 'sha512'
+     */
+    public function getDigest(): string;
+
+    /**
+     * @return mixed|null
+     */
+    public function getParameter(string $parameter);
+
+    public function hasParameter(string $parameter): bool;
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function getParameters(): array;
+
+    /**
+     * @param mixed|null $value
+     */
+    public function setParameter(string $parameter, $value): void;
+
+    /**
+     * Get the provisioning URI.
+     */
+    public function getProvisioningUri(): string;
+
+    /**
+     * Get the provisioning URI.
+     *
+     * @param string $uri         The Uri of the QRCode generator with all parameters. This Uri MUST contain a placeholder that will be replaced by the method.
+     * @param string $placeholder the placeholder to be replaced in the QR Code generator URI
+     */
+    public function getQrCodeUri(string $uri, string $placeholder): string;
+}
diff --git a/vendor/spomky-labs/otphp/src/ParameterTrait.php b/vendor/spomky-labs/otphp/src/ParameterTrait.php
new file mode 100644
index 000000000..69fa774db
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/ParameterTrait.php
@@ -0,0 +1,196 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+use Assert\Assertion;
+use InvalidArgumentException;
+use ParagonIE\ConstantTime\Base32;
+use function Safe\sprintf;
+
+trait ParameterTrait
+{
+    /**
+     * @var array<string, mixed>
+     */
+    private $parameters = [];
+
+    /**
+     * @var string|null
+     */
+    private $issuer;
+
+    /**
+     * @var string|null
+     */
+    private $label;
+
+    /**
+     * @var bool
+     */
+    private $issuer_included_as_parameter = true;
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function getParameters(): array
+    {
+        $parameters = $this->parameters;
+
+        if (null !== $this->getIssuer() && true === $this->isIssuerIncludedAsParameter()) {
+            $parameters['issuer'] = $this->getIssuer();
+        }
+
+        return $parameters;
+    }
+
+    public function getSecret(): string
+    {
+        return $this->getParameter('secret');
+    }
+
+    private function setSecret(?string $secret): void
+    {
+        $this->setParameter('secret', $secret);
+    }
+
+    public function getLabel(): ?string
+    {
+        return $this->label;
+    }
+
+    public function setLabel(string $label): void
+    {
+        $this->setParameter('label', $label);
+    }
+
+    public function getIssuer(): ?string
+    {
+        return $this->issuer;
+    }
+
+    public function setIssuer(string $issuer): void
+    {
+        $this->setParameter('issuer', $issuer);
+    }
+
+    public function isIssuerIncludedAsParameter(): bool
+    {
+        return $this->issuer_included_as_parameter;
+    }
+
+    public function setIssuerIncludedAsParameter(bool $issuer_included_as_parameter): void
+    {
+        $this->issuer_included_as_parameter = $issuer_included_as_parameter;
+    }
+
+    public function getDigits(): int
+    {
+        return $this->getParameter('digits');
+    }
+
+    private function setDigits(int $digits): void
+    {
+        $this->setParameter('digits', $digits);
+    }
+
+    public function getDigest(): string
+    {
+        return $this->getParameter('algorithm');
+    }
+
+    private function setDigest(string $digest): void
+    {
+        $this->setParameter('algorithm', $digest);
+    }
+
+    public function hasParameter(string $parameter): bool
+    {
+        return \array_key_exists($parameter, $this->parameters);
+    }
+
+    public function getParameter(string $parameter)
+    {
+        if ($this->hasParameter($parameter)) {
+            return $this->getParameters()[$parameter];
+        }
+
+        throw new InvalidArgumentException(sprintf('Parameter "%s" does not exist', $parameter));
+    }
+
+    public function setParameter(string $parameter, $value): void
+    {
+        $map = $this->getParameterMap();
+
+        if (true === \array_key_exists($parameter, $map)) {
+            $callback = $map[$parameter];
+            $value = $callback($value);
+        }
+
+        if (property_exists($this, $parameter)) {
+            $this->$parameter = $value;
+        } else {
+            $this->parameters[$parameter] = $value;
+        }
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    protected function getParameterMap(): array
+    {
+        return [
+            'label' => function ($value) {
+                Assertion::false($this->hasColon($value), 'Label must not contain a colon.');
+
+                return $value;
+            },
+            'secret' => function ($value): string {
+                if (null === $value) {
+                    $value = Base32::encodeUpper(random_bytes(64));
+                }
+                $value = trim(mb_strtoupper($value), '=');
+
+                return $value;
+            },
+            'algorithm' => function ($value): string {
+                $value = mb_strtolower($value);
+                Assertion::inArray($value, hash_algos(), sprintf('The "%s" digest is not supported.', $value));
+
+                return $value;
+            },
+            'digits' => function ($value): int {
+                Assertion::greaterThan($value, 0, 'Digits must be at least 1.');
+
+                return (int) $value;
+            },
+            'issuer' => function ($value) {
+                Assertion::false($this->hasColon($value), 'Issuer must not contain a colon.');
+
+                return $value;
+            },
+        ];
+    }
+
+    private function hasColon(string $value): bool
+    {
+        $colons = [':', '%3A', '%3a'];
+        foreach ($colons as $colon) {
+            if (false !== mb_strpos($value, $colon)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
diff --git a/vendor/spomky-labs/otphp/src/TOTP.php b/vendor/spomky-labs/otphp/src/TOTP.php
new file mode 100644
index 000000000..588b37f17
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/TOTP.php
@@ -0,0 +1,159 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+use Assert\Assertion;
+use function Safe\ksort;
+
+final class TOTP extends OTP implements TOTPInterface
+{
+    protected function __construct(?string $secret, int $period, string $digest, int $digits, int $epoch = 0)
+    {
+        parent::__construct($secret, $digest, $digits);
+        $this->setPeriod($period);
+        $this->setEpoch($epoch);
+    }
+
+    public static function create(?string $secret = null, int $period = 30, string $digest = 'sha1', int $digits = 6, int $epoch = 0): TOTPInterface
+    {
+        return new self($secret, $period, $digest, $digits, $epoch);
+    }
+
+    protected function setPeriod(int $period): void
+    {
+        $this->setParameter('period', $period);
+    }
+
+    public function getPeriod(): int
+    {
+        return $this->getParameter('period');
+    }
+
+    private function setEpoch(int $epoch): void
+    {
+        $this->setParameter('epoch', $epoch);
+    }
+
+    public function getEpoch(): int
+    {
+        return $this->getParameter('epoch');
+    }
+
+    public function at(int $timestamp): string
+    {
+        return $this->generateOTP($this->timecode($timestamp));
+    }
+
+    public function now(): string
+    {
+        return $this->at(time());
+    }
+
+    /**
+     * If no timestamp is provided, the OTP is verified at the actual timestamp.
+     */
+    public function verify(string $otp, ?int $timestamp = null, ?int $window = null): bool
+    {
+        $timestamp = $this->getTimestamp($timestamp);
+
+        if (null === $window) {
+            return $this->compareOTP($this->at($timestamp), $otp);
+        }
+
+        return $this->verifyOtpWithWindow($otp, $timestamp, $window);
+    }
+
+    private function verifyOtpWithWindow(string $otp, int $timestamp, int $window): bool
+    {
+        $window = abs($window);
+
+        for ($i = 0; $i <= $window; ++$i) {
+            $next = $i * $this->getPeriod() + $timestamp;
+            $previous = -$i * $this->getPeriod() + $timestamp;
+            $valid = $this->compareOTP($this->at($next), $otp) ||
+                $this->compareOTP($this->at($previous), $otp);
+
+            if ($valid) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private function getTimestamp(?int $timestamp): int
+    {
+        $timestamp = $timestamp ?? time();
+        Assertion::greaterOrEqualThan($timestamp, 0, 'Timestamp must be at least 0.');
+
+        return $timestamp;
+    }
+
+    public function getProvisioningUri(): string
+    {
+        $params = [];
+        if (30 !== $this->getPeriod()) {
+            $params['period'] = $this->getPeriod();
+        }
+
+        if (0 !== $this->getEpoch()) {
+            $params['epoch'] = $this->getEpoch();
+        }
+
+        return $this->generateURI('totp', $params);
+    }
+
+    private function timecode(int $timestamp): int
+    {
+        return (int) floor(($timestamp - $this->getEpoch()) / $this->getPeriod());
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    protected function getParameterMap(): array
+    {
+        $v = array_merge(
+            parent::getParameterMap(),
+            [
+                'period' => function ($value): int {
+                    Assertion::greaterThan((int) $value, 0, 'Period must be at least 1.');
+
+                    return (int) $value;
+                },
+                'epoch' => function ($value): int {
+                    Assertion::greaterOrEqualThan((int) $value, 0, 'Epoch must be greater than or equal to 0.');
+
+                    return (int) $value;
+                },
+            ]
+        );
+
+        return $v;
+    }
+
+    /**
+     * @param array<string, mixed> $options
+     */
+    protected function filterOptions(array &$options): void
+    {
+        parent::filterOptions($options);
+
+        if (isset($options['epoch']) && 0 === $options['epoch']) {
+            unset($options['epoch']);
+        }
+
+        ksort($options);
+    }
+}
diff --git a/vendor/spomky-labs/otphp/src/TOTPInterface.php b/vendor/spomky-labs/otphp/src/TOTPInterface.php
new file mode 100644
index 000000000..a19fe7c0b
--- /dev/null
+++ b/vendor/spomky-labs/otphp/src/TOTPInterface.php
@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2019 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace OTPHP;
+
+interface TOTPInterface extends OTPInterface
+{
+    /**
+     * Create a new TOTP object.
+     *
+     * If the secret is null, a random 64 bytes secret will be generated.
+     */
+    public static function create(?string $secret = null, int $period = 30, string $digest = 'sha1', int $digits = 6): self;
+
+    /**
+     * Return the TOTP at the current time.
+     */
+    public function now(): string;
+
+    /**
+     * Get the period of time for OTP generation (a non-null positive integer, in second).
+     */
+    public function getPeriod(): int;
+
+    public function getEpoch(): int;
+}