First working concept

.editorconfig

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+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.php]
+indent_size = 4

.gitattributes

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+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.travis.yml export-ignore
+/.editorconfig export-ignore
+/phpunit.xml export-ignore
+/tests export-ignore
+/Gruntfile.js export-ignore
+/package.json export-ignore
+/phpunit.xml export-ignore
+/README.md export-ignore
+

.gitignore

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+/node_modules/
+/vendor/
+/report/
+composer.lock

CONTRIBUTING.md

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+# Contributing
+
+Contributions are **welcome** and will be fully **credited**.
+
+We accept contributions via Pull Requests on [Github](https://github.com/tuupola/slim-jwt-auth).
+
+
+## Pull Requests
+
+- **[PSR-2 Coding Standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md)** - The easiest way to apply the conventions is to install [PHP Code Sniffer](http://pear.php.net/package/PHP_CodeSniffer).
+
+- **Add tests!** - Your patch won't be accepted if it doesn't have tests.
+
+- **Document any change in behaviour** - Make sure the `README.md` and any other relevant documentation are kept up-to-date.
+
+- **Consider our release cycle** - We try to follow [SemVer v2.0.0](http://semver.org/). Randomly breaking public APIs is not an option.
+
+- **Create feature branches** - Don't ask us to pull from your master branch.
+
+- **One pull request per feature** - If you want to do more than one thing, send multiple pull requests.
+
+- **Send coherent history** - Make sure each individual commit in your pull request is meaningful. If you had to make multiple intermediate commits while developing, please squash them before submitting.
+
+
+## Running Tests
+
+``` bash
+$ phpunit
+```
+
+
+**Happy coding**!

Gruntfile.js

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+module.exports = function(grunt) {
+    "use strict";
+
+    grunt.initConfig({
+        pkg: grunt.file.readJSON("package.json"),
+        watch: {
+            php: {
+                files: ["src/**/*.php", "tests/**/*.php"],
+                tasks: ["testphp"]
+            }
+        },
+        phpunit: {
+            unit: {
+                dir: "tests"
+            },
+            options: {
+                bin: "vendor/bin/phpunit --bootstrap=vendor/autoload.php --coverage-text --coverage-html ./report",
+                colors: true,
+                testdox: false
+            }
+        },
+        phplint: {
+            options: {
+                swapPath: "/tmp"
+            },
+            all: ["src/**/*.php", "tests/**/*.php"]
+        },
+        phpcs: {
+            application: {
+                src: ["src/**/*.php", "tests/**/*.php"]
+            },
+            options: {
+                bin: "vendor/bin/phpcs",
+                standard: "PSR2"
+            }
+        }
+    });
+
+    require("load-grunt-tasks")(grunt);
+
+    grunt.registerTask("testphp", ["phplint", "phpcs", "phpunit"]);
+    grunt.registerTask("default", ["testphp"]);
+};

LICENSE.md

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+# The MIT License (MIT)
+
+Copyright (c) 2015 Mika Tuupola <[email protected]>
+
+> 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.

README.md

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+# JWT Authentication Middleware for Slim
+
+[![Latest Version](https://img.shields.io/github/release/tuupola/slim-jwt-auth.svg?style=flat-square)](https://github.com/tuupola/slim-jwt-auth/releases)
+[![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE.md)
+[![Build Status](https://img.shields.io/travis/tuupola/slim-jwt-auth/master.svg?style=flat-square)](https://travis-ci.org/tuupola/slim-jwt-auth)
+[![HHVM Status](https://img.shields.io/hhvm/tuupola/slim-jwt-auth.svg?style=flat-square)](http://hhvm.h4cc.de/package/tuupola/slim-jwt-auth)
+[![Coverage](http://img.shields.io/codecov/c/github/tuupola/slim-jwt-auth.svg?style=flat-square)](https://codecov.io/github/tuupola/slim-jwt-auth)
+[![Total Downloads](https://img.shields.io/packagist/dt/tuupola/slim-jwt-auth.svg?style=flat-square)](https://packagist.org/packages/tuupola/slim-jwt-auth)
+
+This middleware implements JSON Web Token Authentication for Slim Framework. It does **not** implement OAuth 2.0 authorization server nor does it provide ways to generate, issue or store authentication tokens. It only parses and authenticates a token when passed via header, cookie or querystring. This is useful when you want to use [JSON Web Tokens as API keys](https://auth0.com/blog/2014/12/02/using-json-web-tokens-as-api-keys/).
+
+## Install
+
+You can install latest version using [composer](https://getcomposer.org/).
+
+``` bash
+$ composer require tuupola/slim-jwt-auth
+```
+
+## Usage
+
+``` php
+$app = new \Slim\Slim();
+$app->add(new \Slim\Middleware\JwtAuthentication([
+    "secret" => "supersecretkeyyoushouldnotcommittogithub"
+]));
+
+$app->get("/hello", function () use ($app) {
+    print_r($app->jwt->data());
+});
+```
+
+## Testing
+
+``` bash
+$ phpunit
+```
+
+## Contributing
+
+Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
+
+## Security
+
+If you discover any security related issues, please email [email protected] instead of using the issue tracker.
+
+## Credits
+
+- [Mika Tuupola](https://github.com/tuupola)
+- [All Contributors](../../contributors)
+
+## License
+
+The MIT License (MIT). Please see [License File](LICENSE.md) for more information.

composer.json

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+{
+    "name": "tuupola/slim-jwt-auth",
+    "description": "JSON Web Token Authorization Middleware for Slim Framework",
+    "keywords": [
+        "slim",
+        "middleware",
+        "jwt",
+        "json",
+        "auth"
+    ],
+    "homepage": "https://github.com/tuupola/slim-jwt-auth",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Mika Tuupola",
+            "email": "[email protected]",
+            "homepage": "http://www.appelsiini.net/",
+            "role": "Developer"
+        }
+    ],
+    "require": {
+        "php" : ">=5.3.0",
+        "firebase/php-jwt": "~2.0",
+        "slim/slim": "~2.3"
+    },
+    "require-dev": {
+        "phpunit/phpunit" : "~4.6",
+        "squizlabs/php_codesniffer": "~2.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "Slim\\Middleware\\": "src"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "Slim\\Middleware\\Test\\": "tests"
+        }
+    }
+}