Add a whitelist of protocols for URLs

 - for Shaare
 - for markdown description links and images

Not whitelisted protocols will be replaced by `http://`

1 files changed, 63 insertions, 0 deletions

diff --git a/tests/Url/WhitelistProtocolsTest.php b/tests/Url/WhitelistProtocolsTest.php
new file mode 100644
index 00000000..a3156804
--- /dev/null
+++ b/tests/Url/WhitelistProtocolsTest.php
@@ -0,0 +1,63 @@
+<?php
+
+require_once 'application/Url.php';
+
+use Shaarli\Config\ConfigManager;
+
+/**
+ * Class WhitelistProtocolsTest
+ *
+ * Test whitelist_protocols() function of Url.
+ */
+class WhitelistProtocolsTest extends PHPUnit_Framework_TestCase
+{
+    /**
+     * Test whitelist_protocols() on a note (relative URL).
+     */
+    public function testWhitelistProtocolsRelative()
+    {
+        $whitelist = ['ftp', 'magnet'];
+        $url = '?12443564';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+        $url = '/path.jpg';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+    }
+
+    /**
+     * Test whitelist_protocols() on a note (relative URL).
+     */
+    public function testWhitelistProtocolMissing()
+    {
+        $whitelist = ['ftp', 'magnet'];
+        $url = 'test.tld/path/?query=value#hash';
+        $this->assertEquals('http://'. $url, whitelist_protocols($url, $whitelist));
+    }
+
+    /**
+     * Test whitelist_protocols() with allowed protocols.
+     */
+    public function testWhitelistAllowedProtocol()
+    {
+        $whitelist = ['ftp', 'magnet'];
+        $url = 'http://test.tld/path/?query=value#hash';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+        $url = 'https://test.tld/path/?query=value#hash';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+        $url = 'ftp://test.tld/path/?query=value#hash';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+        $url = 'magnet:test.tld/path/?query=value#hash';
+        $this->assertEquals($url, whitelist_protocols($url, $whitelist));
+    }
+
+    /**
+     * Test whitelist_protocols() with allowed protocols.
+     */
+    public function testWhitelistDisallowedProtocol()
+    {
+        $whitelist = ['ftp', 'magnet'];
+        $url = 'javascript:alert("xss");';
+        $this->assertEquals('http://alert("xss");', whitelist_protocols($url, $whitelist));
+        $url = 'other://test.tld/path/?query=value#hash';
+        $this->assertEquals('http://test.tld/path/?query=value#hash', whitelist_protocols($url, $whitelist));
+    }
+}