Merge pull request #342 from chriseskow/generate-key-cli

[WIP] Add command line script for generating new keys

bin/generate-defuse-key

@@ -0,0 +1,14 @@
+#!/usr/bin/env php
+<?php
+
+use Defuse\Crypto\Key;
+
+foreach ([__DIR__ . '/../../../autoload.php', __DIR__ . '/../vendor/autoload.php'] as $file) {
+    if (file_exists($file)) {
+        require $file;
+        break;
+    }
+}
+
+$key = Key::createNewRandomKey();
+echo $key->saveToAsciiSafeString(), "\n";

composer.json

@@ -28,5 +28,8 @@
     "require-dev": {
         "phpunit/phpunit": "^4|^5",
         "nikic/php-parser": "^2.0|^3.0"
-    }
+    },
+    "bin": [
+        "bin/generate-defuse-key"
+    ]
 }

docs/Tutorial.md

@@ -100,17 +100,12 @@ Eve is a good database administrator, but she might have incentive to steal the
 data from the database. They want to keep some of the web application's data
 secret from Eve.
 
-In order to do that, Alice will write a script that generates a random
-encryption key and prints it to standard output:
-
-```php
-<?php
-// generate-key.php
-use Defuse\Crypto\Key;
-
-$key = Key::createNewRandomKey();
-echo $key->saveToAsciiSafeString();
+In order to do that, Alice will use the included `generate-defuse-key` script
+which generates a random encryption key and prints it to standard output:
 
+```sh
+$ composer require defuse/php-encryption
+$ vendor/bin/generate-defuse-key
 ```
 
 Alice will run this script once and save the output to a configuration file, say