Support php5.5

.travis.yml

@@ -9,13 +9,18 @@ git:
 
 language: php
 php:
+  - 5.5
+  - 5.6
   - 7.0
   - 7.1
   - 7.2
 
 install:
   - composer install --prefer-dist
 
+before_script:
+  - for P in src tests; do find $P -type f -name '*.php' -exec php -l {} \;; done
+
 script:
   - vendor/bin/phpunit --coverage-text --coverage-clover=coverage.xml
 

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "adhocore/jwt",
-    "description": "Ultra lightweight JSON web token (JWT) library for PHP7.",
+    "description": "Ultra lightweight JSON web token (JWT) library for PHP5.5+.",
     "type": "library",
     "keywords": [
         "jwt", "jwt-php", "auth", "json-web-token", "token"
@@ -15,17 +15,18 @@
     "autoload": {
         "psr-4": {
             "Ahc\\Jwt\\": "src/"
-        }
+        },
+        "files": ["src/functions.php"]
     },
     "autoload-dev": {
         "psr-4": {
             "Ahc\\Jwt\\Test\\": "tests/"
         }
     },
     "require": {
-        "php": ">=7.0"
+        "php": ">=5.5"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.0.0"
+        "phpunit/phpunit": "^4.8 || ^5.7 || ^6.5"
     }
 }

readme.md

@@ -8,7 +8,7 @@
 [![Software License](https://img.shields.io/badge/license-MIT-brightgreen.svg?style=flat-square)](LICENSE)
 
 
-- Lightweight JSON Web Token (JWT) library for PHP7.
+- Lightweight JSON Web Token (JWT) library for PHP5.5 or newer.
 
 ## Installation
 ```

src/JWT.php

@@ -3,7 +3,7 @@
 namespace Ahc\Jwt;
 
 /**
- * JSON Web Token (JWT) implementation in PHP7.
+ * JSON Web Token (JWT) implementation in PHP5.5+.
  *
  * @author   Jitendra Adhikari <jiten.adhikary@gmail.com>
  * @license  MIT
@@ -68,7 +68,7 @@ class JWT
      * @param int             $leeway Leeway for clock skew. Shouldnot be more than 2 minutes (120s).
      * @param string          $pass   The passphrase (only for RS* algos).
      */
-    public function __construct($key, string $algo = 'HS256', int $maxAge = 3600, int $leeway = 0, string $pass = null)
+    public function __construct($key, $algo = 'HS256', $maxAge = 3600, $leeway = 0, $pass = null)
     {
         $this->validateConfig($key, $algo, $maxAge, $leeway);
 
@@ -91,7 +91,7 @@ public function __construct($key, string $algo = 'HS256', int $maxAge = 3600, in
      *
      * @return self
      */
-    public function registerKeys(array $keys): self
+    public function registerKeys(array $keys)
     {
         $this->keys = \array_merge($this->keys, $keys);
 
@@ -106,14 +106,14 @@ public function registerKeys(array $keys): self
      *
      * @return string URL safe JWT token.
      */
-    public function encode(array $payload, array $header = []) : string
+    public function encode(array $payload, array $header = [])
     {
         $header = ['typ' => 'JWT', 'alg' => $this->algo] + $header;
 
         $this->validateKid($header);
 
         if (!isset($payload['iat']) && !isset($payload['exp'])) {
-            $payload['exp'] = ($this->timestamp ?? \time()) + $this->maxAge;
+            $payload['exp'] = ($this->timestamp ?: \time()) + $this->maxAge;
         }
 
         $header    = $this->urlSafeEncode($header);
@@ -130,7 +130,7 @@ public function encode(array $payload, array $header = []) : string
      *
      * @return array
      */
-    public function decode(string $token) : array
+    public function decode($token)
     {
         if (\substr_count($token, '.') < 2) {
             throw new JWTException('Invalid token: Incomplete segments', static::ERROR_TOKEN_INVALID);
@@ -156,7 +156,7 @@ public function decode(string $token) : array
      *
      * @param int|null $timestamp
      */
-    public function setTestTimestamp(int $timestamp = null) : JWT
+    public function setTestTimestamp($timestamp = null)
     {
         $this->timestamp = $timestamp;
 
@@ -170,7 +170,7 @@ public function setTestTimestamp(int $timestamp = null) : JWT
      *
      * @return string
      */
-    protected function sign(string $input) : string
+    protected function sign($input)
     {
         // HMAC SHA.
         if (\substr($this->algo, 0, 2) === 'HS') {
@@ -194,7 +194,7 @@ protected function sign(string $input) : string
      *
      * @return bool
      */
-    protected function verify(string $input, string $signature) : bool
+    protected function verify($input, $signature)
     {
         $algo = $this->algos[$this->algo];
 
@@ -221,7 +221,7 @@ protected function verify(string $input, string $signature) : bool
      *
      * @return string
      */
-    protected function urlSafeEncode($data) : string
+    protected function urlSafeEncode($data)
     {
         if (\is_array($data)) {
             $data = \json_encode($data, JSON_UNESCAPED_SLASHES);
@@ -241,7 +241,7 @@ protected function urlSafeEncode($data) : string
      *
      * @return array|\stdClass|string
      */
-    protected function urlSafeDecode(string $data, bool $asJson = true)
+    protected function urlSafeDecode($data, $asJson = true)
     {
         if (!$asJson) {
             return \base64_decode(\strtr($data, '-_', '+/'));

src/ValidatesJWT.php

@@ -17,7 +17,7 @@ trait ValidatesJWT
      *
      * @codeCoverageIgnore
      */
-    protected function validateConfig($key, string $algo, int $maxAge, int $leeway)
+    protected function validateConfig($key, $algo, $maxAge, $leeway)
     {
         if (empty($key)) {
             throw new JWTException('Signing key cannot be empty', static::ERROR_KEY_EMPTY);
@@ -71,7 +71,7 @@ protected function validateKid(array $header)
      */
     protected function validateTimestamps(array $payload)
     {
-        $timestamp = $this->timestamp ?? \time();
+        $timestamp = $this->timestamp ?: \time();
         $checks    = [
             ['exp', $this->leeway /*          */ , static::ERROR_TOKEN_EXPIRED, 'Expired'],
             ['iat', $this->maxAge - $this->leeway, static::ERROR_TOKEN_EXPIRED, 'Expired'],
@@ -100,7 +100,7 @@ protected function validateKey()
                 $key = 'file://' . $key;
             }
 
-            $this->key = \openssl_get_privatekey($key, $this->passphrase ?? '');
+            $this->key = \openssl_get_privatekey($key, $this->passphrase ?: '');
         }
 
         if (!\is_resource($this->key)) {

src/functions.php

@@ -0,0 +1,23 @@
+<?php
+
+// @codeCoverageIgnoreStart
+if (!\function_exists('hash_equals')) {
+    // PHP5.5 compat.
+    // @see http://php.net/manual/en/function.hash-equals.php#115635
+    function hash_equals($str1, $str2)
+    {
+        if (\strlen($str1) !== \strlen($str2)) {
+            return false;
+        }
+
+        $ret = 0;
+        $res = $str1 ^ $str2;
+
+        for ($i = \strlen($res) - 1; $i >= 0; $i--) {
+            $ret |= ord($res[$i]);
+        }
+
+        return !$ret;
+    }
+}
+// @codeCoverageIgnoreEnd

tests/JWTTest.php

@@ -3,13 +3,12 @@
 namespace Ahc\Jwt\Test;
 
 use Ahc\Jwt\JWT;
-use Ahc\Jwt\JWTException;
 
 /** @coversDefaultClass \Ahc\Jwt\JWT */
 class JWTTest extends \PHPUnit\Framework\TestCase
 {
     /** @dataProvider data1 */
-    public function test_decode_encoded_token(string $key, string $algo, int $age, int $leeway, array $payload, array $header = [])
+    public function test_decode_encoded_token($key, $algo, $age, $leeway, array $payload, array $header = [])
     {
         $jwt   = new JWT($key, $algo, $age, $leeway);
         $token = $jwt->encode($payload, $header);
@@ -26,26 +25,28 @@ public function test_decode_encoded_token(string $key, string $algo, int $age, i
         $this->assertSame($payload, $decoded);
     }
 
+    /**
+     * @expectedException \Ahc\Jwt\JWTException
+     */
     public function test_json_fail()
     {
-        $this->expectException(JWTException::class);
-
         $jwt = new JWT('very^secre7');
 
         try {
-            $jwt->encode([random_bytes(10)]);
+            $jwt->encode([base64_decode('mF6u28o4K2cD3w==')]);
         } catch (\Exception $e) {
             $this->assertSame($e->getCode(), JWT::ERROR_JSON_FAILED, $e->getMessage());
 
             throw $e;
         }
     }
 
-    /** @dataProvider data2 */
-    public function test_decode_fail(string $key, string $algo, int $age, int $leeway, int $offset, int $error, $token)
+    /**
+     * @dataProvider data2
+     * @expectedException \Ahc\Jwt\JWTException
+     */
+    public function test_decode_fail($key, $algo, $age, $leeway, $offset, $error, $token)
     {
-        $this->expectException(JWTException::class);
-
         $jwt   = new JWT($key, $algo, $age, $leeway);
         $token = is_string($token) ? $token : $jwt->encode($token);
 
@@ -63,7 +64,7 @@ public function test_decode_fail(string $key, string $algo, int $age, int $leewa
     }
 
     /** @dataProvider data1 */
-    public function test_rs_decode_encoded(string $key, string $algo, int $age, int $leeway, array $payload, array $header = [])
+    public function test_rs_decode_encoded($key, $algo, $age, $leeway, array $payload, array $header = [])
     {
         $key   = __DIR__ . '/stubs/priv.key';
         $jwt   = new JWT($key, str_replace('HS', 'RS', $algo), $age, $leeway);
@@ -81,11 +82,12 @@ public function test_rs_decode_encoded(string $key, string $algo, int $age, int
         $this->assertSame($payload, $decoded);
     }
 
-    /** @dataProvider data3 */
-    public function test_rs_invalid_key(string $method, string $key, $arg)
+    /**
+     * @dataProvider data3
+     * @expectedException \Ahc\Jwt\JWTException
+     */
+    public function test_rs_invalid_key($method, $key, $arg)
     {
-        $this->expectException(JWTException::class);
-
         $jwt = new JWT($key, 'RS256');
 
         try {
@@ -109,19 +111,20 @@ public function test_kid()
         return $jwt;
     }
 
+    /**
+     * @expectedException \Ahc\Jwt\JWTException
+     * @expectedExceptionMessage Invalid token: Unknown key ID
+     */
     public function test_kid_invalid()
     {
         // keys can be sent as array too
         $jwt = new JWT(['key1' => 'secret1', 'key2' => 'secret2'], 'HS256');
 
-        $this->expectException(JWTException::class);
-        $this->expectExceptionMessage('Invalid token: Unknown key ID');
-
         // Use key3
         $jwt->encode(['a' => 1, 'exp' => time() + 1000], ['kid' => 'key3']);
     }
 
-    public function data1() : array
+    public function data1()
     {
         return [
             ['secret', 'HS256', rand(10, 1000), rand(1, 10), [
@@ -152,7 +155,7 @@ public function data1() : array
         ];
     }
 
-    public function data2() : array
+    public function data2()
     {
         return [
             ['topsecret',     'HS256', 5,  0,  0,  JWT::ERROR_TOKEN_INVALID,    'a.b'],