Exclude .htaccess modifications from code checker

After the initial installation ownCloud will write some content into the .htaccess file such as the 404 or 403 directives. This adds a magic marker into the .htaccess file and only the content above this marker will be compared in the integrity checker.

lib/private/integritycheck/checker.php

@@ -149,16 +149,33 @@ class Checker {
 			}
 
 			$relativeFileName = substr($filename, $baseDirectoryLength);
+			$relativeFileName = ltrim($relativeFileName, '/');
 
 			// Exclude signature.json files in the appinfo and root folder
-			if($relativeFileName === '/appinfo/signature.json') {
+			if($relativeFileName === 'appinfo/signature.json') {
 				continue;
 			}
 			// Exclude signature.json files in the appinfo and core folder
-			if($relativeFileName === '/core/signature.json') {
+			if($relativeFileName === 'core/signature.json') {
 				continue;
 			}
 
+			// The .htaccess file in the root folder of ownCloud can contain
+			// custom content after the installation due to the fact that dynamic
+			// content is written into it at installation time as well. This
+			// includes for example the 404 and 403 instructions.
+			// Thus we ignore everything below the first occurrence of
+			// "#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####" and have the
+			// hash generated based on this.
+			if($filename === $this->environmentHelper->getServerRoot() . '/.htaccess') {
+				$fileContent = file_get_contents($filename);
+				$explodedArray = explode('#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####', $fileContent);
+				if(count($explodedArray) === 2) {
+					$hashes[$relativeFileName] = hash('sha512', $explodedArray[0]);
+					continue;
+				}
+			}
+
 			$hashes[$relativeFileName] = hash_file('sha512', $filename);
 		}
 		return $hashes;

lib/private/integritycheck/helpers/environmenthelper.php

@@ -34,7 +34,7 @@ class EnvironmentHelper {
 	 * @return string
 	 */
 	public function getServerRoot() {
-		return \OC::$SERVERROOT;
+		return rtrim(\OC::$SERVERROOT, '/');
 	}
 
 	/**

lib/private/integritycheck/iterator/excludefoldersbypathfilteriterator.php

@@ -35,6 +35,7 @@ class ExcludeFoldersByPathFilterIterator extends \RecursiveFilterIterator {
 		$this->excludedFolders = array_merge([
 			rtrim(\OC::$server->getConfig()->getSystemValue('datadirectory', \OC::$SERVERROOT . '/data'), '/'),
 			rtrim(\OC::$SERVERROOT.'/themes', '/'),
+			rtrim(\OC::$SERVERROOT.'/config', '/'),
 		], $appFolders);
 	}
 

lib/private/setup.php

@@ -408,7 +408,7 @@ class Setup {
 			\OC::$server->getSecureRandom());
 
 		$htaccessContent = file_get_contents($setupHelper->pathToHtaccess());
-		$content = '';
+		$content = "#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####\n";
 		if (strpos($htaccessContent, 'ErrorDocument 403') === false) {
 			//custom 403 error page
 			$content.= "\nErrorDocument 403 ".\OC::$WEBROOT."/core/templates/403.php";

tests/data/integritycheck/htaccessUnmodified/.htaccess

+# Start of valid file
\ No newline at end of file

tests/data/integritycheck/htaccessUnmodified/subfolder/.htaccess

+# Start of valid file
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+
+# Content that should change the hash in the root folder
\ No newline at end of file

tests/data/integritycheck/htaccessWithInvalidModifiedContent/.htaccess

+# Start of valid file
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+# Content that should not modify the hash
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+# but it does because it is twice
\ No newline at end of file

tests/data/integritycheck/htaccessWithValidModifiedContent/.htaccess

+# Start of valid file
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+
+# Content that should change the hash in the root folder
\ No newline at end of file

tests/data/integritycheck/htaccessWithValidModifiedContent/subfolder/.htaccess

+# Start of valid file
+#### DO NOT CHANGE ANYTHING ABOVE THIS LINE ####
+
+# Content that should change the hash in the root folder
\ No newline at end of file

tests/lib/integritycheck/checkertest.php

@@ -473,6 +473,95 @@ class CheckerTest extends TestCase {
 		$this->checker->writeCoreSignature($x509, $rsa);
 	}
 
+	public function testWriteCoreSignatureWithUnmodifiedHtaccess() {
+		$expectedSignatureFileData = '{
+    "hashes": {
+        ".htaccess": "dc479770a6232061e04a768ee1f9133fdb3aea7b3a99f7105b0e0b6197474733e8d14b5b2bbad054e6b62a410fe5d0b3d790242dee1e0f11274af2100f5289e2",
+        "subfolder\/.htaccess": "2c57b1e25050e11dc3ae975832f378c452159f7b69f818e47eeeafadd6ba568517461dcb4d843b90b906cd7c89d161bc1b89dff8e3ae0eb6f5088508c47befd1"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessUnmodified/'));
+		$this->fileAccessHelper
+				->expects($this->once())
+				->method('file_put_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessUnmodified//core/signature.json',
+						$expectedSignatureFileData
+				);
+
+		$keyBundle = file_get_contents(__DIR__ .'/../../data/integritycheck/core.crt');
+		$rsaPrivateKey = file_get_contents(__DIR__ .'/../../data/integritycheck/core.key');
+		$rsa = new RSA();
+		$rsa->loadKey($rsaPrivateKey);
+		$x509 = new X509();
+		$x509->loadX509($keyBundle);
+		$this->checker->writeCoreSignature($x509, $rsa);
+	}
+
+	public function testWriteCoreSignatureWithInvalidModifiedHtaccess() {
+		$expectedSignatureFileData = '{
+    "hashes": {
+        ".htaccess": "4a54273dc8d697b2ca615acf2ae2c1ee3c1c643492cb04f42b10984fa9aacff1420dc829fd82f93ad3476fbd0cdab0251142c887dc8f872d03e39a3a3eb6d381"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessWithInvalidModifiedContent/'));
+		$this->fileAccessHelper
+				->expects($this->once())
+				->method('file_put_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessWithInvalidModifiedContent//core/signature.json',
+						$expectedSignatureFileData
+				);
+
+		$keyBundle = file_get_contents(__DIR__ .'/../../data/integritycheck/core.crt');
+		$rsaPrivateKey = file_get_contents(__DIR__ .'/../../data/integritycheck/core.key');
+		$rsa = new RSA();
+		$rsa->loadKey($rsaPrivateKey);
+		$x509 = new X509();
+		$x509->loadX509($keyBundle);
+		$this->checker->writeCoreSignature($x509, $rsa);
+	}
+
+	public function testWriteCoreSignatureWithValidModifiedHtaccess() {
+		$expectedSignatureFileData = '{
+    "hashes": {
+        ".htaccess": "a232e6a616c40635d0220e47ebaade40348aadf141a67a331b8870b8fae056584e52fe8b56c49468ee17b58f92cbcd269dc30ae598d6206e97f7d8bb00a766c6",
+        "subfolder\/.htaccess": "2c57b1e25050e11dc3ae975832f378c452159f7b69f818e47eeeafadd6ba568517461dcb4d843b90b906cd7c89d161bc1b89dff8e3ae0eb6f5088508c47befd1"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessWithValidModifiedContent'));
+		$this->fileAccessHelper
+				->expects($this->once())
+				->method('file_put_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/htaccessWithValidModifiedContent/core/signature.json',
+						$expectedSignatureFileData
+				);
+
+		$keyBundle = file_get_contents(__DIR__ .'/../../data/integritycheck/core.crt');
+		$rsaPrivateKey = file_get_contents(__DIR__ .'/../../data/integritycheck/core.key');
+		$rsa = new RSA();
+		$rsa->loadKey($rsaPrivateKey);
+		$x509 = new X509();
+		$x509->loadX509($keyBundle);
+		$this->checker->writeCoreSignature($x509, $rsa);
+	}
+
 	public function testVerifyCoreSignatureWithoutSignatureData() {
 		$this->environmentHelper
 				->expects($this->once())