From 563399081b51443092d82fa29043316df57f26d9 Mon Sep 17 00:00:00 2001
From: Skylar Ittner <admin@netsyms.com>
Date: Fri, 9 Jun 2017 03:33:56 -0600
Subject: [PATCH] Initial commit

---
 .gitignore                   |   5 ++
 LICENSE                      |   9 +++
 api.php                      |  90 ++++++++++++++++++++++
 captcheck.js                 |  58 ++++++++++++++
 composer.json                |   5 ++
 composer.lock                |  77 +++++++++++++++++++
 database.mwb                 | Bin 0 -> 8834 bytes
 images/bolt.png              | Bin 0 -> 752 bytes
 images/building.png          | Bin 0 -> 213 bytes
 images/camera.png            | Bin 0 -> 904 bytes
 images/circle.png            | Bin 0 -> 732 bytes
 images/cloud.png             | Bin 0 -> 744 bytes
 images/cog.png               | Bin 0 -> 981 bytes
 images/cube.png              | Bin 0 -> 924 bytes
 images/envelope.png          | Bin 0 -> 854 bytes
 images/female.png            | Bin 0 -> 790 bytes
 images/file-o.png            | Bin 0 -> 361 bytes
 images/flag.png              | Bin 0 -> 660 bytes
 images/globe.png             | Bin 0 -> 1315 bytes
 images/heart.png             | Bin 0 -> 830 bytes
 images/male.png              | Bin 0 -> 494 bytes
 images/mobile.png            | Bin 0 -> 332 bytes
 images/moon-o.png            | Bin 0 -> 1111 bytes
 images/paint-brush.png       | Bin 0 -> 916 bytes
 images/pencil.png            | Bin 0 -> 450 bytes
 images/picture-o.png         | Bin 0 -> 531 bytes
 images/plane.png             | Bin 0 -> 853 bytes
 images/print.png             | Bin 0 -> 459 bytes
 images/puzzle-piece.png      | Bin 0 -> 959 bytes
 images/shopping-basket.png   | Bin 0 -> 971 bytes
 images/snowflake-o.png       | Bin 0 -> 1108 bytes
 images/square.png            | Bin 0 -> 378 bytes
 images/star.png              | Bin 0 -> 858 bytes
 images/sun-o.png             | Bin 0 -> 968 bytes
 images/tree.png              | Bin 0 -> 497 bytes
 images/truck.png             | Bin 0 -> 545 bytes
 images/umbrella.png          | Bin 0 -> 859 bytes
 index.php                    |   2 +
 nbproject/project.properties |   7 ++
 nbproject/project.xml        |   9 +++
 readme.md                    |  60 +++++++++++++++
 required.php                 | 144 +++++++++++++++++++++++++++++++++++
 settings.template.php        |  14 ++++
 test.html                    |  17 +++++
 test.php                     |   6 ++
 45 files changed, 503 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 LICENSE
 create mode 100644 api.php
 create mode 100644 captcheck.js
 create mode 100644 composer.json
 create mode 100644 composer.lock
 create mode 100644 database.mwb
 create mode 100644 images/bolt.png
 create mode 100644 images/building.png
 create mode 100644 images/camera.png
 create mode 100644 images/circle.png
 create mode 100644 images/cloud.png
 create mode 100644 images/cog.png
 create mode 100644 images/cube.png
 create mode 100644 images/envelope.png
 create mode 100644 images/female.png
 create mode 100644 images/file-o.png
 create mode 100644 images/flag.png
 create mode 100644 images/globe.png
 create mode 100644 images/heart.png
 create mode 100644 images/male.png
 create mode 100644 images/mobile.png
 create mode 100644 images/moon-o.png
 create mode 100644 images/paint-brush.png
 create mode 100644 images/pencil.png
 create mode 100644 images/picture-o.png
 create mode 100644 images/plane.png
 create mode 100644 images/print.png
 create mode 100644 images/puzzle-piece.png
 create mode 100644 images/shopping-basket.png
 create mode 100644 images/snowflake-o.png
 create mode 100644 images/square.png
 create mode 100644 images/star.png
 create mode 100644 images/sun-o.png
 create mode 100644 images/tree.png
 create mode 100644 images/truck.png
 create mode 100644 images/umbrella.png
 create mode 100644 index.php
 create mode 100644 nbproject/project.properties
 create mode 100644 nbproject/project.xml
 create mode 100644 readme.md
 create mode 100644 required.php
 create mode 100644 settings.template.php
 create mode 100644 test.html
 create mode 100644 test.php

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f65e2ba
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+nbproject/private
+settings.php
+database.mwb.bak
+debug
+vendor
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..df0407f
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,9 @@
+Copyright (C) 2017 Netsyms Technologies.
+
+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 NETSYMS TECHNOLOGIES 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.
+
+Except as contained in this notice, the name and other identifying marks of Netsyms Technologies shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from Netsyms Technologies.
\ No newline at end of file
diff --git a/api.php b/api.php
new file mode 100644
index 0000000..ced2072
--- /dev/null
+++ b/api.php
@@ -0,0 +1,90 @@
+<?php
+
+require __DIR__ . '/required.php';
+header("Content-Type: application/json");
+
+switch ($VARS['action']) {
+    case "ping":
+        $out = ["status" => "OK", "pong" => true];
+        exit(json_encode($out));
+    case "new":
+        // generate unique session ID that has an essentially zero chance of being a duplicate.
+        // Contains a hash of a secure random number, a hash of the user's IP, and 23 uniqid() characters.
+        $skey = uniqid(substr(hash("md5", mt_rand()), 3, 5) . hash("md5", getUserIP()), true);
+        $answers = $database->select('answers', ['aid', 'aname']);
+        shuffle($answers);
+        $answers = array_slice($answers, 0, 5);
+        //var_dump($answers);
+        $correct_answer = $answers[mt_rand(0, count($answers) - 1)];
+        $scrambled = ["real" => [], "fake" => []];
+        foreach ($answers as $a) {
+            $scrambled["real"][] = $a['aid'];
+            $scrambled["fake"][] = substr(hash("md5", mt_rand()), 0, 20);
+        }
+        $database->insert("sessions", ["skey" => $skey, "aid" => $correct_answer['aid'], "expired" => 0, "#timestamp" => "NOW()"]);
+        $sid = $database->id();
+        $scrambled_insert = [];
+        for ($i = 0; $i < count($scrambled['real']); $i++) {
+            $scrambled_insert[] = ["sid" => $sid, "aid" => $scrambled['real'][$i], "acode" => $scrambled['fake'][$i]];
+        }
+        $database->insert("scrambled_answers", $scrambled_insert);
+        $resp = [
+            "session" => $skey,
+            "question" => $correct_answer['aname'],
+            "answers" => $scrambled["fake"]
+        ];
+        exit(json_encode($resp));
+    case "img":
+        if (!$database->has('sessions', ['skey' => $VARS['s']])) {
+            sendError("Missing or invalid session ID.", "client");
+        }
+        $sid = $database->get('sessions', 'sid', ['skey' => $VARS['s']]);
+        if (!$database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['c']]])) {
+            sendError("Missing or invalid image code.", "client");
+        }
+        $imgid = $database->get("scrambled_answers", ["[>]answers" => ["aid" => "aid"]], 'aimg', ["AND" => ["sid" => $sid, "acode" => $VARS['c']]]);
+        /* Load image, add some black/white noise, and send */
+        header('Content-Type: image/png');
+        $imgpath = __DIR__ . "/images/" . $imgid . ".png";
+        if (DEBUG) {
+            file_put_contents("debug", $imgpath . "\n", FILE_APPEND);
+        }
+        $img = imagecreatefrompng($imgpath);
+        imageAlphaBlending($img, true);
+        imageSaveAlpha($img, true);
+        $black = imagecolorallocate($img, 0, 0, 0);
+        $white = imagecolorallocate($img, 255, 255, 255);
+        for ($i = 0; $i < 512; $i++) {
+            imagesetpixel($img, mt_rand(0, 63), mt_rand(0, 63), $black);
+        }
+        for ($i = 0; $i < 256; $i++) {
+            imagesetpixel($img, mt_rand(0, 63), mt_rand(0, 63), $white);
+        }
+        imagepng($img);
+        exit();
+    case "verify":
+        if (!$database->has('sessions', ['skey' => $VARS['session_id']])) {
+            echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Session invalid."]);
+            exit();
+        }
+        $sid = $database->get('sessions', 'sid', ['skey' => $VARS['session_id']]);
+        $expired = ($database->get('sessions', 'expired', ['skey' => $VARS['session_id']]) == 1 ? true : false);
+        if ($expired) {
+            echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Session key already used."]);
+            exit();
+        }
+        if (!$database->has("scrambled_answers", ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]])) {
+            echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer invalid."]);
+            exit();
+        }
+        $aid = $database->get('scrambled_answers', 'aid', ["AND" => ["sid" => $sid, "acode" => $VARS['answer_id']]]);
+        if ($database->has('sessions', ["AND" => ["sid" => $sid, "aid" => $aid]])) {
+            echo json_encode(["session" => $VARS['session_id'], "result" => true]);
+        } else {
+            echo json_encode(["session" => $VARS['session_id'], "result" => false, "msg" => "Answer incorrect."]);
+        }
+        $database->update("sessions", ['expired' => 1], ["sid" => $sid]);
+        exit();
+    default:
+        sendError("Bad Request", "client");
+}
\ No newline at end of file
diff --git a/captcheck.js b/captcheck.js
new file mode 100644
index 0000000..5a04c6c
--- /dev/null
+++ b/captcheck.js
@@ -0,0 +1,58 @@
+window.onload = function () {
+    var api_url = "http://192.168.25.1/captcheck/api.php";
+    var getJSON = function (url, callback) {
+        var xhr = new XMLHttpRequest();
+        xhr.open('GET', url, true);
+        xhr.onreadystatechange = function () {
+            if (this.readyState == 4) {
+                callback(this.status, this.responseText);
+            }
+        };
+        xhr.send();
+    };
+    getJSON(api_url + "?action=new", function (status, json) {
+        /* Add custom styles */
+        var styles = document.createElement('style');
+        styles.innerHTML = ".captcheck_box {font-family: Ubuntu, Arial, sans-serif; border: 1px solid #e0e0e0; border-radius: 3px; display: inline-block; padding: 3px; margin: 5px 2px 5px 1px; background-color: #f5f5f5;} .captcheck_answer_label > input {visibility: hidden; position: absolute;} .captcheck_answer_label > input + img {cursor: pointer; border: 2px solid transparent; border-radius: 3px; min-width: 32px; width: 18%; max-width: 64px;} .captcheck_answer_label > input:checked + img {cursor: pointer; border: 2px solid #424242; border-radius: 3px;} .captcheck_error_message { color: red; }";
+        document.body.appendChild(styles);
+
+        /* Get captcha container div */
+        var container = document.getElementById("captcheck_container");
+        /* Create captcha div */
+        var captcha = document.createElement("div");
+        captcha.setAttribute("class", "captcheck_box");
+        container.appendChild(captcha);
+        
+        if (status == 200) {
+            var data = JSON.parse(json);
+            /* Create answer buttons */
+            var answers = "";
+            for (var i = 0, len = data.answers.length; i < len; i++) {
+                var src = api_url + "?action=img&s=" + data.session + "&c=" + data.answers[i];
+                answers += "<span class='captcheck_answer_label' onclick='chooseAnswer(\"" + data.answers[i] + "\")'><input id='captcheck_answer_" + data.answers[i] + "' type='radio' name='captcheck_selected_answer' value='" + data.answers[i] + "' /><img src='" + src + "' /></span>";
+            }
+            var answer_div = document.createElement("div");
+            answer_div.innerHTML = answers;
+            /* Create question */
+            var question_div = document.createElement("div");
+            question_div.innerHTML = "Click on the <b>" + data.question + "</b>:";
+
+            /* Add question and answers */
+            captcha.appendChild(question_div);
+            captcha.appendChild(answer_div);
+
+            /* Add hidden session ID element */
+            var skey_input = document.createElement("span");
+            skey_input.innerHTML = "<input type='hidden' name='captcheck_session_code' value='" + data.session + "' />";
+            captcha.appendChild(skey_input);
+        } else {
+            /* Add error message */
+            captcha.innerHTML = "<span class='captcheck_error_message'>There was a problem loading the CAPTCHA.</span>";
+        }
+    });
+}
+
+function chooseAnswer(ans) {
+    var box = document.getElementById("captcheck_answer_" + ans);
+    box.checked = true;
+}
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..7e61998
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,5 @@
+{
+    "require": {
+        "catfan/medoo": "^1.4"
+    }
+}
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..86b83e6
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,77 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "3d60b6d6d1ba750afa45d307e067f006",
+    "packages": [
+        {
+            "name": "catfan/medoo",
+            "version": "v1.4.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/catfan/Medoo.git",
+                "reference": "bcabbef4d8355d52fc4d19f17463e5e816c9ef44"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/catfan/Medoo/zipball/bcabbef4d8355d52fc4d19f17463e5e816c9ef44",
+                "reference": "bcabbef4d8355d52fc4d19f17463e5e816c9ef44",
+                "shasum": ""
+            },
+            "require": {
+                "ext-pdo": "*",
+                "php": ">=5.4"
+            },
+            "suggest": {
+                "ext-pdo_dblib": "For MSSQL or Sybase database on Linux/UNIX platform",
+                "ext-pdo_mysql": "For MySQL or MariaDB database",
+                "ext-pdo_oci": "For Oracle database",
+                "ext-pdo_oci8": "For Oracle version 8 database",
+                "ext-pdo_pqsql": "For PostgreSQL database",
+                "ext-pdo_sqlite": "For SQLite database",
+                "ext-pdo_sqlsrv": "For MSSQL database on Windows platform"
+            },
+            "type": "framework",
+            "autoload": {
+                "psr-4": {
+                    "Medoo\\": "/src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Angel Lai",
+                    "email": "angel@catfan.me"
+                }
+            ],
+            "description": "The lightest PHP database framework to accelerate development",
+            "homepage": "https://medoo.in",
+            "keywords": [
+                "database",
+                "lightweight",
+                "mariadb",
+                "mssql",
+                "mysql",
+                "oracle",
+                "php framework",
+                "postgresql",
+                "sql",
+                "sqlite"
+            ],
+            "time": "2017-06-02T15:25:04+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}
diff --git a/database.mwb b/database.mwb
new file mode 100644
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diff --git a/images/cube.png b/images/cube.png
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diff --git a/images/envelope.png b/images/envelope.png
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diff --git a/images/female.png b/images/female.png
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diff --git a/images/flag.png b/images/flag.png
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diff --git a/images/mobile.png b/images/mobile.png
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diff --git a/images/picture-o.png b/images/picture-o.png
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diff --git a/images/plane.png b/images/plane.png
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diff --git a/images/print.png b/images/print.png
new file mode 100644
index 0000000000000000000000000000000000000000..34c4c465cbefc7c2247b6b5d364b86fd93292a91
GIT binary patch
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literal 0
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diff --git a/images/puzzle-piece.png b/images/puzzle-piece.png
new file mode 100644
index 0000000000000000000000000000000000000000..7426bdb8608287289e700287ea3eaebfa29fc091
GIT binary patch
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diff --git a/images/shopping-basket.png b/images/shopping-basket.png
new file mode 100644
index 0000000000000000000000000000000000000000..ad318e87fab4b99d18033bd47398bcf430030438
GIT binary patch
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literal 0
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diff --git a/images/snowflake-o.png b/images/snowflake-o.png
new file mode 100644
index 0000000000000000000000000000000000000000..83d444023df072f3646349273812d3216d8c9d2d
GIT binary patch
literal 1108
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diff --git a/images/square.png b/images/square.png
new file mode 100644
index 0000000000000000000000000000000000000000..5a0f90f2f2a6a39866647c4949de3b3644855af0
GIT binary patch
literal 378
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literal 0
HcmV?d00001

diff --git a/images/star.png b/images/star.png
new file mode 100644
index 0000000000000000000000000000000000000000..555fe91579a51a8438fa87ae8cd1d9baf7eb935d
GIT binary patch
literal 858
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literal 0
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diff --git a/images/sun-o.png b/images/sun-o.png
new file mode 100644
index 0000000000000000000000000000000000000000..07a4eb5f28bc2c5aeb47db509603c4f8d747ff00
GIT binary patch
literal 968
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literal 0
HcmV?d00001

diff --git a/images/tree.png b/images/tree.png
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index 0000000000000000000000000000000000000000..f34aeb6f6d4000d597061f3f1911b8ba80171817
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/images/truck.png b/images/truck.png
new file mode 100644
index 0000000000000000000000000000000000000000..835d32e1365fd9a7b68556a3652f2f8ce49457a2
GIT binary patch
literal 545
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literal 0
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diff --git a/images/umbrella.png b/images/umbrella.png
new file mode 100644
index 0000000000000000000000000000000000000000..b9ba0ae9e5c11023733804c78141366e6e908d42
GIT binary patch
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diff --git a/index.php b/index.php
new file mode 100644
index 0000000..207fe1c
--- /dev/null
+++ b/index.php
@@ -0,0 +1,2 @@
+<?php
+header("Location: test.html");
\ No newline at end of file
diff --git a/nbproject/project.properties b/nbproject/project.properties
new file mode 100644
index 0000000..911a7b8
--- /dev/null
+++ b/nbproject/project.properties
@@ -0,0 +1,7 @@
+include.path=${php.global.include.path}
+php.version=PHP_70
+source.encoding=UTF-8
+src.dir=.
+tags.asp=false
+tags.short=false
+web.root=.
diff --git a/nbproject/project.xml b/nbproject/project.xml
new file mode 100644
index 0000000..3ef54ad
--- /dev/null
+++ b/nbproject/project.xml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://www.netbeans.org/ns/project/1">
+    <type>org.netbeans.modules.php.project</type>
+    <configuration>
+        <data xmlns="http://www.netbeans.org/ns/php-project/1">
+            <name>Captcheck</name>
+        </data>
+    </configuration>
+</project>
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..9618f53
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,60 @@
+Captcheck
+=========
+
+Easy, light, self-hostable CAPTCHA service.  Works on all modern browsers and 
+IE9+.  Uses icons from Font-Awesome.
+
+How to use
+----------
+
+In your form, put an empty div with the ID "captcheck_container". 
+Add `captcheck.js` into your page.
+
+    <!DOCTYPE html>
+    <html>
+        <head>
+            <title>Captcheck Sample Form</title>
+            <meta charset="UTF-8">
+            <meta name="viewport" content="width=device-width, initial-scale=1.0">
+            <script src="captcheck.js"></script>
+        </head>
+        <body>
+            <form action="submit.php">
+                <input type="text" name="form_field" placeholder="Some random form field" />
+                <div id="captcheck_container">
+                </div>
+                <button type="submit">Submit Form</button>
+            </form>
+        </body>
+    </html>
+
+When the form is submitted, your server will receive two extra form fields: 
+`captcheck_session_code` and `captcheck_selected_answer`.
+In your form handling code, send a request to `http(s)://captcheck-url/api.php`. 
+Pass the variables `session_id` and `answer_id` with the values sent with the form, 
+and also pass the variable `action` with the value `verify`.  
+You will receive a JSON response with (among other things) `"result": true` or 
+`"result": false`.  If result is false, the user failed the test, and another 
+variable `msg` is available with an explanation.
+
+Example URL:  
+`http(s)://captcheck-url/api.php?action=verify&session_id=<captcheck_session_code>&answer_id=<captcheck_selected_answer>`
+
+Example responses:  
+`{"session":"some_session_id","result":true}`  
+`{"session":"some_session_id","result":false,"msg":"Answer incorrect."}`
+
+
+Execution Flow
+--------------
+
+    JS = captcheck.js, API = api.php, FORM = parent form, 
+    SITE = form processing code, -> = some action taken on the right by the left
+
+    JS -> API:      Request session ID, question, and answers (with scrambled random codes)
+    API -> JS:      Sends info, saves session ID, correct answer, and scrambled answer codes in DB
+    JS -> API:      Requests answer images by sending scrambled value and session ID
+    JS -> FORM:     Adds hidden field with value=session ID, displays question and images
+    [USER SUBMITS FORM]
+    SITE -> API:    Sends session ID and scrambled answer
+    API -> SITE:    Responds with true/false to indicate if the answer is valid, marks session as expired to prevent CAPTCHA reuse
diff --git a/required.php b/required.php
new file mode 100644
index 0000000..557625e
--- /dev/null
+++ b/required.php
@@ -0,0 +1,144 @@
+<?php
+
+/**
+ * This file contains global settings and utility functions.
+ */
+ob_start(); // allow sending headers after content
+//
+// Unicode, solves almost all stupid encoding problems
+header('Content-Type: application/json; charset=utf-8');
+header('X-Content-Type-Options: nosniff');
+header('Access-Control-Allow-Origin: *');
+
+
+$session_length = (60 * 60) * 8; // 1 hour x 8 = 8 hours
+session_set_cookie_params($session_length, "/", null, false, true);
+
+session_start(); // stick some cookies in it
+// renew session cookie
+setcookie(session_name(), session_id(), time() + $session_length);
+
+// Composer
+require __DIR__ . '/vendor/autoload.php';
+
+require __DIR__ . '/settings.php';
+
+/**
+ * Kill off the running process and spit out an error message
+ * @param string $error error message
+ * @param string $fault who's fault the error is: "server" (default) or "client".
+ */
+function sendError($error, $fault = "server") {
+    if ($fault == "server") {
+        header('HTTP/1.1 500 Internal Server Error');
+        $code = 500;
+    } else {
+        header('HTTP/1.1 400 Bad Request');
+        $code = 400;
+    }
+    die(json_encode(["error" => $error, "code" => $code]));
+}
+
+// Database settings
+// Also inits database and stuff
+use Medoo\Medoo;
+
+$database;
+try {
+    $database = new Medoo([
+        'database_type' => DB_TYPE,
+        'database_name' => DB_NAME,
+        'server' => DB_SERVER,
+        'username' => DB_USER,
+        'password' => DB_PASS,
+        'charset' => DB_CHARSET
+    ]);
+} catch (Exception $ex) {
+    sendError("Database error.  Try again later.");
+}
+
+
+if (!DEBUG) {
+    error_reporting(0);
+} else {
+    error_reporting(E_ALL);
+    ini_set('display_errors', 'On');
+}
+
+
+$VARS;
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    $VARS = $_POST;
+    define("GET", false);
+} else {
+    $VARS = $_GET;
+    define("GET", true);
+}
+
+/**
+ * Checks if a string or whatever is empty.
+ * @param $str The thingy to check
+ * @return boolean True if it's empty or whatever.
+ */
+function is_empty($str) {
+    return (is_null($str) || !isset($str) || $str == '');
+}
+
+/*
+ * http://stackoverflow.com/a/20075147/2534036
+ */
+if (!function_exists('base_url')) {
+
+    function base_url($atRoot = FALSE, $atCore = FALSE, $parse = FALSE) {
+        if (isset($_SERVER['HTTP_HOST'])) {
+            $http = isset($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off' ? 'https' : 'http';
+            $hostname = $_SERVER['HTTP_HOST'];
+            $dir = str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);
+
+            $core = preg_split('@/@', str_replace($_SERVER['DOCUMENT_ROOT'], '', realpath(dirname(__FILE__))), NULL, PREG_SPLIT_NO_EMPTY);
+            $core = $core[0];
+
+            $tmplt = $atRoot ? ($atCore ? "%s://%s/%s/" : "%s://%s/") : ($atCore ? "%s://%s/%s/" : "%s://%s%s");
+            $end = $atRoot ? ($atCore ? $core : $hostname) : ($atCore ? $core : $dir);
+            $base_url = sprintf($tmplt, $http, $hostname, $end);
+        } else
+            $base_url = 'http://localhost/';
+
+        if ($parse) {
+            $base_url = parse_url($base_url);
+            if (isset($base_url['path']))
+                if ($base_url['path'] == '/')
+                    $base_url['path'] = '';
+        }
+
+        return $base_url;
+    }
+
+}
+
+
+/**
+ * Attempts to discover the user's IP address.
+ * @return string IP string or "NOT FOUND".
+ */
+function getUserIP() {
+    $ip = "";
+    if (isset($_SERVER["HTTP_CF_CONNECTING_IP"])) {
+        $ip = $_SERVER["HTTP_CF_CONNECTING_IP"];
+    } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
+        $ip = $_SERVER["HTTP_CLIENT_IP"];
+    } else if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
+        $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];
+    } else if (isset($_SERVER["HTTP_X_FORWARDED"])) {
+        $ip = $_SERVER["HTTP_X_FORWARDED"];
+    } else if (isset($_SERVER["HTTP_FORWARDED_FOR"])) {
+        $ip = $_SERVER["HTTP_FORWARDED_FOR"];
+    } else if (isset($_SERVER["HTTP_FORWARDED"])) {
+        $ip = $_SERVER["HTTP_FORWARDED"];
+    } else if (isset($_SERVER["REMOTE_ADDR"])) {
+        $ip = $_SERVER["REMOTE_ADDR"];
+    } else {
+        $ip = "NOT FOUND";
+    }
+    return $ip;
+}
\ No newline at end of file
diff --git a/settings.template.php b/settings.template.php
new file mode 100644
index 0000000..5653230
--- /dev/null
+++ b/settings.template.php
@@ -0,0 +1,14 @@
+<?php
+
+// Whether to show debugging data in output.
+// DO NOT SET TO TRUE IN PRODUCTION!!!
+define("DEBUG", false);
+
+// Database connection settings
+// See http://medoo.in/api/new for info
+define("DB_TYPE", "mysql");
+define("DB_NAME", "captcheck");
+define("DB_SERVER", "localhost");
+define("DB_USER", "");
+define("DB_PASS", "");
+define("DB_CHARSET", "utf8");
\ No newline at end of file
diff --git a/test.html b/test.html
new file mode 100644
index 0000000..da05f99
--- /dev/null
+++ b/test.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Captcheck Test Page</title>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <script src="captcheck.js"></script>
+    </head>
+    <body>
+        <form action="test.php" method="GET">
+            <input type="text" name="junk" placeholder="Junk" />
+            <div id="captcheck_container">
+            </div>
+            <button type="submit">Submit Form</button>
+        </form>
+    </body>
+</html>
diff --git a/test.php b/test.php
new file mode 100644
index 0000000..6952c66
--- /dev/null
+++ b/test.php
@@ -0,0 +1,6 @@
+<?php
+
+//header("Content-Type: application/json");
+header("Content-Type: text/plain");
+
+echo json_encode(["get" => $_GET, "api" => json_decode(file_get_contents("http://localhost/captcheck/api.php?action=verify&session_id=" . $_GET["captcheck_session_code"] . "&answer_id=".$_GET["captcheck_selected_answer"]), true)]);
\ No newline at end of file