Implement forked version

.gitignore

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+# PHPStorm
+.idea
+
+# Composer
+composer.phar
+composer.lock
+vendor
+
+phpunit.xml
+.phpunit.result.cache
+build/

.travis.yml

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+language: php
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+php:
+  - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
+  - 7.4snapshot
+
+matrix:
+  allow_failures:
+    - php: nightly
+
+before_script:
+  - travis_retry composer install
+
+script:
+  - composer test

README.md

@@ -1 +1,83 @@
-GoogleAuthenticator
+Google Authenticator (TOTP)
+===========================
+
+[![Build Status](https://travis-ci.org/Vectorface/GoogleAuthenticator.png?branch=master)](https://travis-ci.org/Vectorface/GoogleAuthenticator)
+
+This is a fork of https://github.com/PHPGangsta/GoogleAuthenticator with the following changes:
+
+- Uses https://github.com/endroid/qr-code to generate QR code data URIs
+- No longer generates Google's Chart API to make QR code links
+- Uses namespacing
+- Augmented test coverage to 100%
+- Bumped minimum PHP version to 5.6
+
+Original License:
+-----------------
+
+* Copyright (c) 2012-2016, [http://www.phpgangsta.de](http://www.phpgangsta.de)
+* Author: Michael Kliewe, [@PHPGangsta](http://twitter.com/PHPGangsta) and [contributors](https://github.com/PHPGangsta/GoogleAuthenticator/graphs/contributors)
+* Licensed under the BSD License.
+
+Description:
+------------
+
+This PHP class can be used to interact with the Google Authenticator mobile app for 2-factor-authentication. This class
+can generate secrets, generate codes, validate codes and present a QR-Code for scanning the secret. It implements TOTP 
+according to [RFC6238](https://tools.ietf.org/html/rfc6238)
+
+For a secure installation you have to make sure that used codes cannot be reused (replay-attack). You also need to
+limit the number of verifications, to fight against brute-force attacks. For example you could limit the amount of
+verifications to 10 tries within 10 minutes for one IP address (or IPv6 block). It depends on your environment.
+
+Usage:
+------
+
+See following example:
+
+```php
+<?php
+require_once __DIR__ . 'vendor/autoload.php';
+
+use Vectorface\GoogleAuthenticator;
+
+$ga = new GoogleAuthenticator();
+$secret = $ga->createSecret();
+echo "Secret is: ".$secret."\n\n";
+
+$qrCodeUrl = $ga->getQRCodeUrl('Blog', $secret);
+echo "PNG Data URI for the QR-Code: ".$qrCodeUrl."\n\n";
+
+$oneCode = $ga->getCode($secret);
+echo "Checking Code '$oneCode' and Secret '$secret':\n";
+
+$checkResult = $ga->verifyCode($secret, $oneCode, 2);    // 2 = 2*30sec clock tolerance
+if ($checkResult) {
+    echo 'OK';
+} else {
+    echo 'FAILED';
+}
+```
+Running the script provides output similar to:
+```
+Secret is: OQB6ZZGYHCPSX4AK
+
+Google Charts URL for the QR-Code: data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAARgAAAEYCAIAAAAI[snipped]
+
+Checking Code '848634' and Secret 'OQB6ZZGYHCPSX4AK':
+OK
+```
+
+Installation:
+-------------
+
+- Use [Composer](https://getcomposer.org/doc/01-basic-usage.md) to
+  install the package
+
+```composer require vectorface/googleauthenticator```
+
+Run Tests:
+----------
+
+- All tests are inside `tests` folder.
+- Execute `composer install` to prepare your environment.
+- Run `composer test` from the project root directory.

composer.json

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+{
+  "name": "vectorface/googleauthenticator",
+  "description": "Google Authenticator 2-factor authentication",
+  "version": "1.0.0",
+  "type": "library",
+  "keywords": ["GoogleAuthenticator", "TOTP", "rfc6238"],
+  "license": ["BSD-2-Clause"],
+  "authors": [
+    {
+      "name": "Michael Kliewe",
+      "email": "[email protected]",
+      "homepage": "http://www.phpgangsta.de/",
+      "role": "Developer"
+    },
+    {
+      "name": "Francis Lavoie",
+      "email": "[email protected]",
+      "homepage": "http://vectorface.com/",
+      "role": "Developer"
+    }
+  ],
+  "support": {
+    "source": "https://github.com/Vectorface/GoogleAuthenticator",
+    "issues": "https://github.com/Vectorface/GoogleAuthenticator/issues"
+  },
+  "require": {
+    "php": ">=5.6",
+    "endroid/qr-code": "^2"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^6"
+  },
+  "config": {
+    "sort-packages": true
+  },
+  "autoload": {
+    "psr-4": {
+      "Vectorface\\": "src/"
+    }
+  },
+  "autoload-dev": {
+    "psr-4": {
+      "Tests\\Vectorface\\": "tests/"
+    }
+  },
+  "scripts": {
+    "test": [
+      "@test-unit"
+    ],
+    "test-unit": "phpunit --color=always"
+  }
+}

phpunit.xml.dist

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+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit backupGlobals="false" bootstrap="./vendor/autoload.php" colors="true">
+    <testsuites>
+        <testsuite name="default">
+            <directory>./tests</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist>
+            <directory>./src</directory>
+        </whitelist>
+    </filter>
+    <logging>
+        <log type="coverage-text" target="php://stdout"/>
+        <log type="coverage-html" target="build/coverage"/>
+        <log type="coverage-clover" target="build/logs/clover.xml"/>
+    </logging>
+</phpunit>