add use ssl

Author: kulavvy

README.md

@@ -62,3 +62,19 @@ return [
     ]
 ];
 ```
+
+**SSL configuration** example:
+```php
+return [
+    //....
+    'components' => [
+        'redis' => [
+            'class' => 'yii\redis\Connection',
+            'hostname' => 'localhost',
+            'port' => 6380,
+            'database' => 0,
+            'useSSL' => true,
+        ],
+    ],
+];
+```

composer.json

@@ -18,7 +18,8 @@
         }
     ],
     "require": {
-        "yiisoft/yii2": "~2.0.16"
+        "yiisoft/yii2": "~2.0.16",
+        "ext-openssl": "*"
     },
     "require-dev": {
         "phpunit/phpunit": "<7",

src/Connection.php

@@ -281,6 +281,11 @@ class Connection extends Component
      * @var float timeout to use for redis socket when reading and writing data. If not set the php default value will be used.
      */
     public $dataTimeout;
+    /**
+     * @var boolean Send sockets over SSL protocol. Default state is false.
+     * @since 2.0.12
+     */
+    public $useSSL = false;
     /**
      * @var integer Bitmask field which may be set to any combination of connection flags passed to [stream_socket_client()](https://www.php.net/manual/en/function.stream-socket-client.php).
      * Currently the select of connection flags is limited to `STREAM_CLIENT_CONNECT` (default), `STREAM_CLIENT_ASYNC_CONNECT` and `STREAM_CLIENT_PERSISTENT`.
@@ -596,6 +601,9 @@ public function open()
             if ($this->dataTimeout !== null) {
                 stream_set_timeout($socket, $timeout = (int) $this->dataTimeout, (int) (($this->dataTimeout - $timeout) * 1000000));
             }
+            if ($this->useSSL) {
+                stream_socket_enable_crypto($socket, true, STREAM_CRYPTO_METHOD_TLS_CLIENT);
+            }
             if ($this->password !== null) {
                 $this->executeCommand('AUTH', [$this->password]);
             }