Add Akamai token generator

src/Akamai.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: amir
+ * Date: 26/01/2017
+ * Time: 15:16
+ */
+
+namespace Cloudinary;
+
+
+trait Akamai {
+
+	public static function generate_akamai_token($options=array()){
+		$key = \Cloudinary::option_get($options, "key", \Cloudinary::config_get("akamai_key"));
+		if(!isset($key)) throw new \Exception("Missing akamai_key configuration");
+		$name = \Cloudinary::option_get($options, "token_name", "__cld_token__");
+		$start = \Cloudinary::option_get($options, "start_time");
+		$expiration = \Cloudinary::option_get($options, "end_time");
+		$ip = \Cloudinary::option_get($options, "ip");
+		$acl = \Cloudinary::option_get($options, "acl");
+		$window  = \Cloudinary::option_get($options, "window");
+
+		if(!strcasecmp($start, "now")) {
+			$start = time();
+		} elseif (is_numeric($start)) {
+			$start = 0 + $start;
+		}
+		if(!isset($expiration)){
+			if(isset($window)){
+				$expiration = (isset($start) ? $start : time()) + $window;
+			} else {
+				throw new \Cloudinary\Error("Must provide 'end_time' or 'window'.");
+			}
+		}
+		$token = array();
+		if(isset($ip)) array_push($token, "ip=$ip");
+		if(isset($start)) array_push($token, "st=$start");
+		array_push($token, "exp=$expiration");
+		array_push($token, "acl=$acl");
+		$auth = self::digest(join("~", $token), $key);
+		array_push($token, "hmac=$auth");
+		return "$name=" . join("~", $token);
+	}
+
+	private static function digest($message, $key = NULL) {
+		if(!isset($key)) $key = \Cloudinary::config_get("akamai_key");
+		$bin_key = pack("H*", $key);
+		return hash_hmac( "sha256", $message, $bin_key);
+	}
+}

src/Cloudinary.php

@@ -1,7 +1,9 @@
 <?php
+require_once 'Akamai.php';
 
 class Cloudinary {
 
+	use \Cloudinary\Akamai;
     const CF_SHARED_CDN = "d3jpl91pxevbkh.cloudfront.net";
     const OLD_AKAMAI_SHARED_CDN = "cloudinary-a.akamaihd.net";
     const AKAMAI_SHARED_CDN = "res.cloudinary.com";

tests/CloudinaryTest.php

@@ -926,6 +926,54 @@ public function test_translate_if() {
   }
 
 
+  public function test_akamai_token() {
+  	\Cloudinary::config(array("akamai_key"=>"00112233FF99"));
+	  $token = Cloudinary::generate_akamai_token(
+		  array(
+			  "start_time" => 1111111111,
+			  "acl"        => '/image/*',
+			  "window"     => 300
+		  ) );
+	  $this->assertEquals(
+		  '__cld_token__=st=1111111111~exp=1111111411~acl=/image/*~' .
+		  'hmac=0854e8b6b6a46471a80b2dc28c69bd352d977a67d031755cc6f3486c121b43af',
+		  $token,
+		  "should generate an Akamai token with start_time and window" );
+	  $first_exp = time() + 300;
+	  $token = Cloudinary::generate_akamai_token(
+		  array(
+			  "acl"        => '*',
+			  "window"     => 300
+		  ) );
+	  $second_exp = time() + 300;
+	  preg_match('/exp=(\d+)/', $token, $matches);
+	  $this->assertNotEmpty($matches);
+	  $this->assertNotEmpty($matches[1]);
+	  $expiration = 0+ $matches[1];
+	  $this->assertGreaterThanOrEqual($first_exp, $expiration);
+	  $this->assertLessThanOrEqual($second_exp, $expiration);
+  }
+  public function test_accepts_key() {
+	$this->assertEquals('__cld_token__=exp=10000000~acl=*~' .
+	                   'hmac=030eafb6b19e499659d699b3d43e7595e35e3c0060e8a71904b3b8c8759f4890',
+	                   Cloudinary::generate_akamai_token(
+	                   	array(
+		                    "acl"        => '*',
+		                    "end_time"     => 10000000,
+		                    "key"        => '00aabbff'
+	                    )
+	                   ));
+  }
+	/**
+	 * @expectedException Cloudinary\Error
+	 */
+  public function test_requires_end_time_or_window() {
+	  Cloudinary::generate_akamai_token(
+		  array(
+			  "acl"        => '*'
+		  ) );
+  }
+
   private function cloudinary_url_assertion($source, $options, $expected, $expected_options = array()) {
     $url = Cloudinary::cloudinary_url($source, $options);
     $this->assertEquals($expected_options, $options);