From 310c18e6bbd8e7f78a0a45f0501cb1dc6fab2159 Mon Sep 17 00:00:00 2001
From: Andrew Dolgov <noreply@fakecake.org>
Date: Wed, 20 Jun 2018 18:27:34 +0300
Subject: move OTPHP to vendor/; additionally move Base32 class to OTPHP
 namespace

---
 vendor/OTPHP/OTP.php | 120 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 vendor/OTPHP/OTP.php

(limited to 'vendor/OTPHP/OTP.php')

diff --git a/vendor/OTPHP/OTP.php b/vendor/OTPHP/OTP.php
new file mode 100644
index 000000000..d1995ef99
--- /dev/null
+++ b/vendor/OTPHP/OTP.php
@@ -0,0 +1,120 @@
+<?php
+/*
+ * Copyright (c) 2011 Le Lag
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+namespace OTPHP {
+/**
+ * One Time Password Generator
+ *
+ * The OTP class allow the generation of one-time
+ * password that is described in rfc 4xxx.
+ *
+ * This is class is meant to be compatible with
+ * Google Authenticator.
+ *
+ * This class was originally ported from the rotp
+ * ruby library available at https://github.com/mdp/rotp
+ */
+class OTP {
+    /**
+     * The base32 encoded secret key
+     * @var string
+     */
+    public $secret;
+
+    /**
+     * The algorithm used for the hmac hash function
+     * @var string
+     */
+    public $digest;
+
+    /**
+     * The number of digits in the one-time password
+     * @var integer
+     */
+    public $digits;
+
+    /**
+     * Constructor for the OTP class
+     * @param string $secret the secret key
+     * @param array $opt options array can contain the
+     * following keys :
+     *   @param integer digits : the number of digits in the one time password
+     *   Currently Google Authenticator only support 6. Defaults to 6.
+     *   @param string digest : the algorithm used for the hmac hash function
+     *   Google Authenticator only support sha1. Defaults to sha1
+     *
+     * @return new OTP class.
+     */
+    public function __construct($secret, $opt = Array()) {
+      $this->digits = isset($opt['digits']) ? $opt['digits'] : 6;
+      $this->digest = isset($opt['digest']) ? $opt['digest'] : 'sha1';
+      $this->secret = $secret;
+    }
+
+    /**
+     * Generate a one-time password
+     *
+     * @param integer $input : number used to seed the hmac hash function.
+     * This number is usually a counter (HOTP) or calculated based on the current
+     * timestamp (see TOTP class).
+     * @return integer the one-time password
+     */
+    public function generateOTP($input) {
+      $hash = hash_hmac($this->digest, $this->intToBytestring($input), $this->byteSecret());
+      foreach(str_split($hash, 2) as $hex) { // stupid PHP has bin2hex but no hex2bin WTF
+        $hmac[] = hexdec($hex);
+      }
+      $offset = $hmac[19] & 0xf;
+      $code = ($hmac[$offset+0] & 0x7F) << 24 |
+        ($hmac[$offset + 1] & 0xFF) << 16 |
+        ($hmac[$offset + 2] & 0xFF) << 8 |
+        ($hmac[$offset + 3] & 0xFF);
+      return $code % pow(10, $this->digits);
+    }
+
+    /**
+     * Returns the binary value of the base32 encoded secret
+     * @access private
+     * This method should be private but was left public for
+     * phpunit tests to work.
+     * @return binary secret key
+     */
+    public function byteSecret() {
+      return Base32::decode($this->secret);
+    }
+
+    /**
+     * Turns an integer in a OATH bytestring
+     * @param integer $int
+     * @access private
+     * @return string bytestring
+     */
+    public function intToBytestring($int) {
+      $result = Array();
+      while($int != 0) {
+        $result[] = chr($int & 0xFF);
+        $int >>= 8;
+      }
+      return str_pad(join(array_reverse($result)), 8, "\000", STR_PAD_LEFT);
+    }
+  }
+}
-- 
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