Add code integrity check

This PR implements the base foundation of the code signing and integrity check. In this PR implemented is the signing and verification logic, as well as commands to sign single apps or the core repository.

Furthermore, there is a basic implementation to display problems with the code integrity on the update screen.

Code signing basically happens the following way:

- There is a ownCloud Root Certificate authority stored `resources/codesigning/root.crt` (in this PR I also ship the private key which we obviously need to change before a release :wink:). This certificate is not intended to be used for signing directly and only is used to sign new certificates.
- Using the `integrity:sign-core` and `integrity:sign-app` commands developers can sign either the core release or a single app. The core release needs to be signed with a certificate that has a CN of `core`,  apps need to be signed with a certificate that either has a CN of `core` (shipped apps!)  or the AppID.
- The command generates a signature.json file of the following format:
```json
{
    "hashes": {
        "/filename.php": "2401fed2eea6f2c1027c482a633e8e25cd46701f811e2d2c10dc213fd95fa60e350bccbbebdccc73a042b1a2799f673fbabadc783284cc288e4f1a1eacb74e3d",
        "/lib/base.php": "55548cc16b457cd74241990cc9d3b72b6335f2e5f45eee95171da024087d114fcbc2effc3d5818a6d5d55f2ae960ab39fd0414d0c542b72a3b9e08eb21206dd9"
    },
    "certificate": "-----BEGIN CERTIFICATE-----MIIBvTCCASagAwIBAgIUPvawyqJwCwYazcv7iz16TWxfeUMwDQYJKoZIhvcNAQEF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\niG+UxI/MNcWV0uJg9S63LF8=\n-----END CERTIFICATE-----",
    "signature": "U29tZVNpZ25lZERhdGFFeGFtcGxl"
}
```
`hashes` is an array of all files in the folder with their corresponding SHA512 hashes (this is actually quite cheap to calculate), the `certificate` is the  certificate used for signing. It has to be issued by the ownCloud Root Authority and it's CN needs to be permitted to perform the required action. The `signature` is then a signature of the `hashes` which can be verified using the `certificate`.

Steps to do in other PRs, this is already a quite huge one:
- Add nag screen in case the code check fails to ensure that administrators are aware of this.
- Add code verification also to OCC upgrade and unify display code more.
- Add enforced code verification to apps shipped from the appstore with a level of "official"
- Add enfocrced code verification to apps shipped from the appstore that were already signed in a previous release
- Add some developer documentation on how devs can request their own certificate
- Check when installing ownCloud
- Add support for CRLs to allow revoking certificates

**Note:** The upgrade checks are only run when the instance has a defined release channel of `stable` (defined in `version.php`). If you want to test this, you need to change the channel thus and then generate the core signature:

```
➜  master git:(add-integrity-checker) ✗ ./occ integrity:sign-core --privateKey=resources/codesigning/core.key --certificate=resources/codesigning/core.crt
Successfully signed "core"
```

Then increase the version and you should see something like the following:

![2015-11-04_12-02-57](https://cloud.githubusercontent.com/assets/878997/10936336/6adb1d14-82ec-11e5-8f06-9a74801c9abf.png)

As you can see a failed code check will not prevent the further update. It will instead just be a notice to the admin. In a next step we will add some nag screen.

For packaging stable releases this requires the following additional steps as a last action before zipping:
1. Run `./occ integrity:sign-core` once
2. Run `./occ integrity:sign-app` _for each_ app. However, this can be simply automated using a simple foreach on the apps folder.

18 files changed, 1936 insertions, 2 deletions

diff --git a/tests/data/integritycheck/SomeApp.crt b/tests/data/integritycheck/SomeApp.crt
new file mode 100644
index 00000000000..a9bd4cd8a7c
--- /dev/null
+++ b/tests/data/integritycheck/SomeApp.crt
@@ -0,0 +1,28 @@
+-----BEGIN CERTIFICATE-----
+MIIEwTCCAqmgAwIBAgIUWv0iujufs5lUr0svCf/qTQvoyKAwDQYJKoZIhvcNAQEF
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+4B+pXTAcRK0zECDEaX3npS8xWzrB
+-----END CERTIFICATE-----
\ No newline at end of file
diff --git a/tests/data/integritycheck/SomeApp.key b/tests/data/integritycheck/SomeApp.key
new file mode 100644
index 00000000000..ce59eb1b86f
--- /dev/null
+++ b/tests/data/integritycheck/SomeApp.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----
\ No newline at end of file
diff --git a/tests/data/integritycheck/app/AnotherFile.txt b/tests/data/integritycheck/app/AnotherFile.txt
new file mode 100644
index 00000000000..cf85999ddfc
--- /dev/null
+++ b/tests/data/integritycheck/app/AnotherFile.txt
@@ -0,0 +1 @@
+Another file with some Content.
diff --git a/tests/data/integritycheck/app/subfolder/file.txt b/tests/data/integritycheck/app/subfolder/file.txt
new file mode 100644
index 00000000000..69cd4e0afaf
--- /dev/null
+++ b/tests/data/integritycheck/app/subfolder/file.txt
@@ -0,0 +1 @@
+A file with some content.
diff --git a/tests/data/integritycheck/appWithInvalidData/AnotherFile.txt b/tests/data/integritycheck/appWithInvalidData/AnotherFile.txt
new file mode 100644
index 00000000000..c73a4892418
--- /dev/null
+++ b/tests/data/integritycheck/appWithInvalidData/AnotherFile.txt
@@ -0,0 +1 @@
+TAMPERED FILE.
\ No newline at end of file
diff --git a/tests/data/integritycheck/appWithInvalidData/UnecessaryFile b/tests/data/integritycheck/appWithInvalidData/UnecessaryFile
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/tests/data/integritycheck/appWithInvalidData/UnecessaryFile
diff --git a/tests/data/integritycheck/core.crt b/tests/data/integritycheck/core.crt
new file mode 100644
index 00000000000..475a59bddce
--- /dev/null
+++ b/tests/data/integritycheck/core.crt
@@ -0,0 +1,28 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
\ No newline at end of file
diff --git a/tests/data/integritycheck/core.key b/tests/data/integritycheck/core.key
new file mode 100644
index 00000000000..4a588d47356
--- /dev/null
+++ b/tests/data/integritycheck/core.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
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+Lcq5zXyM4gs1hDnrasn1g0JyfeUgnPNNuWeFG0cMb8o7FeYQImhqheIgMJLP
+-----END RSA PRIVATE KEY-----
\ No newline at end of file
diff --git a/tests/data/integritycheck/root.crt b/tests/data/integritycheck/root.crt
new file mode 100644
index 00000000000..539bd9a199f
--- /dev/null
+++ b/tests/data/integritycheck/root.crt
@@ -0,0 +1,28 @@
+-----BEGIN CERTIFICATE-----
+MIIE1DCCArygAwIBAgIUFgEnT7tUWNgEKfbMiRTOm3Z8figwDQYJKoZIhvcNAQEF
+BQAwIzEhMB8GA1UECgwYb3duQ2xvdWQgQ29kZSBTaWduaW5nIENBMCAXDTE1MTEw
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+9YtqEkvyoRTwErwuN/FIVvhWnIP/C69Z1/T/nXyj86P2G7PMgnchIQ==
+-----END CERTIFICATE-----
diff --git a/tests/data/integritycheck/root.key b/tests/data/integritycheck/root.key
new file mode 100644
index 00000000000..557b0a26e3a
--- /dev/null
+++ b/tests/data/integritycheck/root.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIJKgIBAAKCAgEAra2BMIsKboc0TcdS9kp7ZC/82pQOzpMBHLAZ+GLMOO5xHb6e
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+Nj5rx6J2brnNLTD7yo/j74kgaRwSuHafpGX1C0zge0rgIgVu8DhWHan7F/38K0cO
+T1jYJbYcTAvEcO1XXXItnaHR1ETY4p0G5FvUTLWaNQnQTU3r5ZaCkjXN9UBA2k6U
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+J8DspH3ygeLtvKOveEYsiaiNuJLKREC2GIRUm6O4C/RdP0s0QAODpk+yGCfukg==
+-----END RSA PRIVATE KEY-----
diff --git a/tests/lib/command/integrity/SignAppTest.php b/tests/lib/command/integrity/SignAppTest.php
new file mode 100644
index 00000000000..b7c34585c5c
--- /dev/null
+++ b/tests/lib/command/integrity/SignAppTest.php
@@ -0,0 +1,247 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace Test\Command\Integrity;
+
+use OC\Core\Command\Integrity\SignApp;
+use OC\IntegrityCheck\Checker;
+use OC\IntegrityCheck\Helpers\FileAccessHelper;
+use Test\TestCase;
+
+class SignAppTest extends TestCase {
+	/** @var Checker */
+	private $checker;
+	/** @var SignApp */
+	private $signApp;
+	/** @var FileAccessHelper */
+	private $fileAccessHelper;
+
+	public function setUp() {
+		parent::setUp();
+		$this->checker = $this->getMockBuilder('\OC\IntegrityCheck\Checker')
+			->disableOriginalConstructor()->getMock();
+		$this->fileAccessHelper = $this->getMockBuilder('\OC\IntegrityCheck\Helpers\FileAccessHelper')
+			->disableOriginalConstructor()->getMock();
+		$this->signApp = new SignApp(
+			$this->checker,
+			$this->fileAccessHelper
+		);
+	}
+
+	public function testExecuteWithMissingAppId() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue(null));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('PrivateKey'));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('Certificate'));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('--appId, --privateKey and --certificate are required.');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithMissingPrivateKey() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue('AppId'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue(null));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('Certificate'));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('--appId, --privateKey and --certificate are required.');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithMissingCertificate() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue('AppId'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue(null));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('--appId, --privateKey and --certificate are required.');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithNotExistingPrivateKey() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue('AppId'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(false));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Private key "privateKey" does not exists.');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithNotExistingCertificate() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue('AppId'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+		$this->fileAccessHelper
+			->expects($this->at(1))
+			->method('file_get_contents')
+			->with('certificate')
+			->will($this->returnValue(false));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Certificate "certificate" does not exists.');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecute() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('appId')
+			->will($this->returnValue('AppId'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(2))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+		$this->fileAccessHelper
+			->expects($this->at(1))
+			->method('file_get_contents')
+			->with('certificate')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
+
+		$this->checker
+			->expects($this->once())
+			->method('writeAppSignature');
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Successfully signed "AppId"');
+
+		$this->invokePrivate($this->signApp, 'execute', [$inputInterface, $outputInterface]);
+	}
+}
diff --git a/tests/lib/command/integrity/SignCoreTest.php b/tests/lib/command/integrity/SignCoreTest.php
new file mode 100644
index 00000000000..885c6fc664e
--- /dev/null
+++ b/tests/lib/command/integrity/SignCoreTest.php
@@ -0,0 +1,194 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace Test\Command\Integrity;
+
+use OC\Core\Command\Integrity\SignCore;
+use OC\IntegrityCheck\Checker;
+use OC\IntegrityCheck\Helpers\FileAccessHelper;
+use Test\TestCase;
+
+class SignCoreTest extends TestCase {
+	/** @var Checker */
+	private $checker;
+	/** @var SignCore */
+	private $signCore;
+	/** @var FileAccessHelper */
+	private $fileAccessHelper;
+
+	public function setUp() {
+		parent::setUp();
+		$this->checker = $this->getMockBuilder('\OC\IntegrityCheck\Checker')
+			->disableOriginalConstructor()->getMock();
+		$this->fileAccessHelper = $this->getMockBuilder('\OC\IntegrityCheck\Helpers\FileAccessHelper')
+			->disableOriginalConstructor()->getMock();
+		$this->signCore = new SignCore(
+			$this->checker,
+			$this->fileAccessHelper
+		);
+	}
+
+	public function testExecuteWithMissingPrivateKey() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue(null));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('Certificate'));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('--privateKey and --certificate are required.');
+
+		$this->invokePrivate($this->signCore, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithMissingCertificate() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue(null));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('--privateKey and --certificate are required.');
+
+		$this->invokePrivate($this->signCore, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithNotExistingPrivateKey() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(false));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Private key "privateKey" does not exists.');
+
+		$this->invokePrivate($this->signCore, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecuteWithNotExistingCertificate() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+		$this->fileAccessHelper
+			->expects($this->at(1))
+			->method('file_get_contents')
+			->with('certificate')
+			->will($this->returnValue(false));
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Certificate "certificate" does not exists.');
+
+		$this->invokePrivate($this->signCore, 'execute', [$inputInterface, $outputInterface]);
+	}
+
+	public function testExecute() {
+		$inputInterface = $this->getMock('\Symfony\Component\Console\Input\InputInterface');
+		$outputInterface = $this->getMock('\Symfony\Component\Console\Output\OutputInterface');
+
+		$inputInterface
+			->expects($this->at(0))
+			->method('getOption')
+			->with('privateKey')
+			->will($this->returnValue('privateKey'));
+		$inputInterface
+			->expects($this->at(1))
+			->method('getOption')
+			->with('certificate')
+			->will($this->returnValue('certificate'));
+
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_get_contents')
+			->with('privateKey')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.key'));
+		$this->fileAccessHelper
+			->expects($this->at(1))
+			->method('file_get_contents')
+			->with('certificate')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/core.crt'));
+
+		$this->checker
+			->expects($this->once())
+			->method('writeCoreSignature');
+
+		$outputInterface
+			->expects($this->at(0))
+			->method('writeln')
+			->with('Successfully signed "core"');
+
+		$this->invokePrivate($this->signCore, 'execute', [$inputInterface, $outputInterface]);
+	}
+}
diff --git a/tests/lib/integritycheck/checkertest.php b/tests/lib/integritycheck/checkertest.php
new file mode 100644
index 00000000000..17117a4274b
--- /dev/null
+++ b/tests/lib/integritycheck/checkertest.php
@@ -0,0 +1,671 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace Test\IntegrityCheck;
+
+use OC\IntegrityCheck\Checker;
+use OC\Memcache\NullCache;
+use phpseclib\Crypt\RSA;
+use phpseclib\File\X509;
+use Test\TestCase;
+use OC\IntegrityCheck\Helpers\EnvironmentHelper;
+use OC\IntegrityCheck\Helpers\FileAccessHelper;
+use OC\IntegrityCheck\Helpers\AppLocator;
+use OCP\IConfig;
+use OCP\ICacheFactory;
+use OCP\App\IAppManager;
+
+class CheckerTest extends TestCase {
+	/** @var EnvironmentHelper */
+	private $environmentHelper;
+	/** @var AppLocator */
+	private $appLocator;
+	/** @var Checker */
+	private $checker;
+	/** @var FileAccessHelper */
+	private $fileAccessHelper;
+	/** @var IConfig */
+	private $config;
+	/** @var ICacheFactory */
+	private $cacheFactory;
+	/** @var IAppManager */
+	private $appManager;
+
+	public function setUp() {
+		parent::setUp();
+		$this->environmentHelper = $this->getMock('\OC\IntegrityCheck\Helpers\EnvironmentHelper');
+		$this->fileAccessHelper = $this->getMock('\OC\IntegrityCheck\Helpers\FileAccessHelper');
+		$this->appLocator = $this->getMock('\OC\IntegrityCheck\Helpers\AppLocator');
+		$this->config = $this->getMock('\OCP\IConfig');
+		$this->cacheFactory = $this->getMock('\OCP\ICacheFactory');
+		$this->appManager = $this->getMock('\OCP\App\IAppManager');
+
+		$this->cacheFactory
+			->expects($this->any())
+			->method('create')
+			->with('oc.integritycheck.checker')
+			->will($this->returnValue(new NullCache()));
+
+		$this->checker = new Checker(
+			$this->environmentHelper,
+			$this->fileAccessHelper,
+			$this->appLocator,
+			$this->config,
+			$this->cacheFactory,
+			$this->appManager
+		);
+	}
+
+	/**
+	 * @expectedException \Exception
+	 * @expectedExceptionMessage Directory name must not be empty.
+	 */
+	public function testWriteAppSignatureOfNotExistingApp() {
+		$keyBundle = file_get_contents(__DIR__ .'/../../data/integritycheck/SomeApp.crt');
+		$rsaPrivateKey = file_get_contents(__DIR__ .'/../../data/integritycheck/SomeApp.key');
+		$rsa = new RSA();
+		$rsa->loadKey($rsaPrivateKey);
+		$x509 = new X509();
+		$x509->loadX509($keyBundle);
+		$this->checker->writeAppSignature('NotExistingApp', $x509, $rsa);
+	}
+
+	public function testWriteAppSignature() {
+		$expectedSignatureFileData = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\n4B+pXTAcRK0zECDEaX3npS8xWzrB\r\n-----END CERTIFICATE-----"
+}';
+		$this->appLocator
+			->expects($this->once())
+			->method('getAppPath')
+			->with('SomeExistingApp')
+			->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$this->fileAccessHelper
+			->expects($this->once())
+			->method('file_put_contents')
+			->with(
+					\OC::$SERVERROOT . '/tests/data/integritycheck/app//appinfo/signature.json',
+					$expectedSignatureFileData
+			);
+
+		$keyBundle = file_get_contents(__DIR__ .'/../../data/integritycheck/SomeApp.crt');
+		$rsaPrivateKey = file_get_contents(__DIR__ .'/../../data/integritycheck/SomeApp.key');
+		$rsa = new RSA();
+		$rsa->loadKey($rsaPrivateKey);
+		$x509 = new X509();
+		$x509->loadX509($keyBundle);
+		$this->checker->writeAppSignature('SomeExistingApp', $x509, $rsa);
+	}
+
+	public function testVerifyAppSignatureWithoutSignatureData() {
+		$expected = [
+			'EXCEPTION' => [
+					'class' => 'OC\IntegrityCheck\Exceptions\InvalidSignatureException',
+					'message' => 'Signature data not found.',
+			],
+		];
+		$this->assertSame($expected, $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testVerifyAppSignatureWithValidSignatureData() {
+		$this->appLocator
+				->expects($this->once())
+				->method('getAppPath')
+				->with('SomeApp')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//appinfo/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						'/resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$this->assertSame([], $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testVerifyAppSignatureWithTamperedSignatureData() {
+		$this->appLocator
+				->expects($this->once())
+				->method('getAppPath')
+				->with('SomeApp')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "tampered",
+        "subfolder\/file.txt": "tampered"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\n4B+pXTAcRK0zECDEaX3npS8xWzrB\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//appinfo/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						'/resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'EXCEPTION' => [
+						'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+						'message' => 'Signature could not get verified.',
+				],
+		];
+		$this->assertEquals($expected, $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testVerifyAppSignatureWithTamperedFiles() {
+		$this->appLocator
+				->expects($this->once())
+				->method('getAppPath')
+				->with('SomeApp')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//appinfo/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						'/resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+
+		$expected = [
+			'INVALID_HASH' => [
+				'AnotherFile.txt' => [
+						'expected' => '1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112',
+						'current' => '7322348ba269c6d5522efe02f424fa3a0da319a7cd9c33142a5afe32a2d9af2da3a411f086fcfc96ff4301ea566f481dba0960c2abeef3594c4d930462f6584c',
+				],
+			],
+			'FILE_MISSING' => [
+				'subfolder/file.txt' => [
+						'expected' => '410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b',
+						'current' => '',
+				],
+			],
+			'EXTRA_FILE' => [
+				'UnecessaryFile' => [
+						'expected' => '',
+						'current' => 'cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e',
+				],
+			],
+
+		];
+		$this->assertSame($expected, $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testVerifyAppWithDifferentScope() {
+		$this->appLocator
+				->expects($this->once())
+				->method('getAppPath')
+				->with('SomeApp')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nD8YRQg0cjmDytJzHDrtV\/aTc9W1aPHun0vw=\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//appinfo/signature.json')
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						'/resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'EXCEPTION' => [
+						'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+						'message' => 'Certificate is not valid for required scope. (Requested: SomeApp, current: CN=AnotherScope)',
+					],
+		];
+		$this->assertSame($expected, $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testVerifyAppWithDifferentScopeAndAlwaysTrustedCore() {
+		$this->appLocator
+				->expects($this->once())
+				->method('getAppPath')
+				->with('SomeApp')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(\OC::$SERVERROOT . '/tests/data/integritycheck/app//appinfo/signature.json')
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+					'/resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$this->assertSame([], $this->checker->verifyAppSignature('SomeApp'));
+	}
+
+	public function testWriteCoreSignature() {
+		$expectedSignatureFileData = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "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/app/'));
+		$this->fileAccessHelper
+				->expects($this->once())
+				->method('file_put_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//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() {
+		$expected = [
+			'EXCEPTION' => [
+				'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+				'message' => 'Signature data not found.',
+			],
+		];
+		$this->assertSame($expected, $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreSignatureWithValidSignatureData() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$this->assertSame([], $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreSignatureWithValidSignatureDataAndNotAlphabeticOrder() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$this->assertSame([], $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreSignatureWithTamperedSignatureData() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "tampered",
+        "subfolder\/file.txt": "tampered"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'EXCEPTION' => [
+						'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+						'message' => 'Signature could not get verified.',
+				]
+		];
+		$this->assertSame($expected, $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreSignatureWithTamperedFiles() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\nV204fGUkJqW5CrKy3P3XvY9X\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/appWithInvalidData//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'INVALID_HASH' => [
+						'AnotherFile.txt' => [
+								'expected' => '1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112',
+								'current' => '7322348ba269c6d5522efe02f424fa3a0da319a7cd9c33142a5afe32a2d9af2da3a411f086fcfc96ff4301ea566f481dba0960c2abeef3594c4d930462f6584c',
+						],
+				],
+				'FILE_MISSING' => [
+						'subfolder/file.txt' => [
+								'expected' => '410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b',
+								'current' => '',
+						],
+				],
+				'EXTRA_FILE' => [
+						'UnecessaryFile' => [
+								'expected' => '',
+								'current' => 'cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e',
+						],
+				],
+
+		];
+		$this->assertSame($expected, $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreWithInvalidCertificate() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\noj7YKHsaTVGA+FxBktZHfoxD\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'EXCEPTION' => [
+						'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+						'message' => 'Certificate is not valid.',
+				]
+		];
+		$this->assertSame($expected, $this->checker->verifyCoreSignature());
+	}
+
+	public function testVerifyCoreWithDifferentScope() {
+		$this->environmentHelper
+				->expects($this->any())
+				->method('getServerRoot')
+				->will($this->returnValue(\OC::$SERVERROOT . '/tests/data/integritycheck/app/'));
+		$signatureDataFile = '{
+    "hashes": {
+        "AnotherFile.txt": "1570ca9420e37629de4328f48c51da29840ddeaa03ae733da4bf1d854b8364f594aac560601270f9e1797ed4cd57c1aea87bf44cf4245295c94f2e935a2f0112",
+        "subfolder\/file.txt": "410738545fb623c0a5c8a71f561e48ea69e3ada0981a455e920a5ae9bf17c6831ae654df324f9328ff8453de179276ae51931cca0fa71fe8ccde6c083ca0574b"
+    },
+    "signature": "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",
+    "certificate": "-----BEGIN CERTIFICATE-----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\r\n4B+pXTAcRK0zECDEaX3npS8xWzrB\r\n-----END CERTIFICATE-----"
+}';
+		$this->fileAccessHelper
+				->expects($this->at(0))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//core/signature.json'
+				)
+				->will($this->returnValue($signatureDataFile));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_get_contents')
+				->with(
+						\OC::$SERVERROOT . '/tests/data/integritycheck/app//resources/codesigning/root.crt'
+				)
+				->will($this->returnValue(file_get_contents(__DIR__ .'/../../data/integritycheck/root.crt')));
+
+		$expected = [
+				'EXCEPTION' => [
+						'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException',
+						'message' => 'Certificate is not valid for required scope. (Requested: core, current: CN=SomeApp)',
+				]
+		];
+		$this->assertSame($expected, $this->checker->verifyCoreSignature());
+	}
+
+	public function testRunInstanceVerification() {
+		$this->checker = $this->getMockBuilder('\OC\IntegrityCheck\Checker')
+			->setConstructorArgs([
+				$this->environmentHelper,
+				$this->fileAccessHelper,
+				$this->appLocator,
+				$this->config,
+				$this->cacheFactory,
+				$this->appManager,
+			])
+			->setMethods([
+				'verifyCoreSignature',
+				'verifyAppSignature',
+			])
+			->getMock();
+
+		$this->checker
+			->expects($this->at(0))
+			->method('verifyCoreSignature');
+		$this->appLocator
+			->expects($this->at(0))
+			->Method('getAllApps')
+			->will($this->returnValue([
+				'files',
+				'calendar',
+				'contacts',
+				'dav',
+			]));
+		$this->appManager
+			->expects($this->at(0))
+			->method('isShipped')
+			->with('files')
+			->will($this->returnValue(true));
+		$this->checker
+			->expects($this->at(1))
+			->method('verifyAppSignature')
+			->with('files');
+		$this->appManager
+			->expects($this->at(1))
+			->method('isShipped')
+			->with('calendar')
+			->will($this->returnValue(false));
+		$this->appLocator
+			->expects($this->at(1))
+			->method('getAppPath')
+			->with('calendar')
+			->will($this->returnValue('/apps/calendar'));
+		$this->fileAccessHelper
+			->expects($this->at(0))
+			->method('file_exists')
+			->with('/apps/calendar/appinfo/signature.json')
+			->will($this->returnValue(true));
+		$this->checker
+			->expects($this->at(2))
+			->method('verifyAppSignature')
+			->with('calendar');
+		$this->appManager
+				->expects($this->at(2))
+				->method('isShipped')
+				->with('contacts')
+				->will($this->returnValue(false));
+		$this->appLocator
+				->expects($this->at(2))
+				->method('getAppPath')
+				->with('contacts')
+				->will($this->returnValue('/apps/contacts'));
+		$this->fileAccessHelper
+				->expects($this->at(1))
+				->method('file_exists')
+				->with('/apps/contacts/appinfo/signature.json')
+				->will($this->returnValue(false));
+		$this->appManager
+			->expects($this->at(3))
+			->method('isShipped')
+			->with('dav')
+			->will($this->returnValue(true));
+		$this->checker
+			->expects($this->at(3))
+			->method('verifyAppSignature')
+			->with('dav');
+
+		$this->checker->runInstanceVerification();
+	}
+
+}
diff --git a/tests/lib/integritycheck/helpers/AppLocatorTest.php b/tests/lib/integritycheck/helpers/AppLocatorTest.php
new file mode 100644
index 00000000000..d0083298b22
--- /dev/null
+++ b/tests/lib/integritycheck/helpers/AppLocatorTest.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace Test\IntegrityCheck\Helpers;
+
+use OC\IntegrityCheck\Helpers\AppLocator;
+use Test\TestCase;
+
+class AppLocatorTest extends TestCase {
+	/** @var AppLocator */
+	private $locator;
+
+	public function setUp() {
+		parent::setUp();
+		$this->locator = new AppLocator();
+	}
+
+	public function testGetAppPath() {
+		$this->assertSame(\OC_App::getAppPath('files'), $this->locator->getAppPath('files'));
+	}
+
+	/**
+	 * @expectedException \Exception
+	 * @expectedExceptionMessage App not found
+	 */
+	public function testGetAppPathNotExistentApp() {
+		$this->locator->getAppPath('aTotallyNotExistingApp');
+	}
+
+	public function testGetAllApps() {
+		$this->assertSame(\OC_App::getAllApps(), $this->locator->getAllApps());
+	}
+}
diff --git a/tests/lib/integritycheck/helpers/EnvironmentHelperTest.php b/tests/lib/integritycheck/helpers/EnvironmentHelperTest.php
new file mode 100644
index 00000000000..4a292188e75
--- /dev/null
+++ b/tests/lib/integritycheck/helpers/EnvironmentHelperTest.php
@@ -0,0 +1,32 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace Test\IntegrityCheck\Factories;
+
+use OC\IntegrityCheck\Helpers\EnvironmentHelper;
+use Test\TestCase;
+
+class EnvironmentHelperTest extends TestCase {
+	public function testGetServerRoot() {
+		$factory = new EnvironmentHelper();
+		$this->assertSame(\OC::$SERVERROOT, $factory->getServerRoot());
+	}
+}
diff --git a/tests/lib/integritycheck/helpers/FileAccessHelperTest.php b/tests/lib/integritycheck/helpers/FileAccessHelperTest.php
new file mode 100644
index 00000000000..740b14e61c4
--- /dev/null
+++ b/tests/lib/integritycheck/helpers/FileAccessHelperTest.php
@@ -0,0 +1,43 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+namespace Test\IntegrityCheck\Helpers;
+
+use OC\IntegrityCheck\Helpers\FileAccessHelper;
+use Test\TestCase;
+
+class FileAccessHelperTest extends TestCase {
+	/** @var FileAccessHelper */
+	private $fileAccessHelper;
+
+	public function setUp() {
+		parent::setUp();
+		$this->fileAccessHelper = new FileAccessHelper();
+	}
+
+	public function testReadAndWrite() {
+		$tempManager = \OC::$server->getTempManager();
+		$filePath = $tempManager->getTemporaryFile();
+		$data = 'SomeDataGeneratedByIntegrityCheck';
+
+		$this->fileAccessHelper->file_put_contents($filePath, $data);
+		$this->assertSame($data, $this->fileAccessHelper->file_get_contents($filePath));
+	}
+}
diff --git a/tests/lib/updater.php b/tests/lib/updater.php
index 1651fe1759d..14ae3db3276 100644
--- a/tests/lib/updater.php
+++ b/tests/lib/updater.php
@@ -24,6 +24,7 @@ namespace OC;
 
 use OCP\IConfig;
 use OCP\ILogger;
+use OC\IntegrityCheck\Checker;
 
 class UpdaterTest extends \Test\TestCase {
 	/** @var IConfig */
@@ -34,6 +35,8 @@ class UpdaterTest extends \Test\TestCase {
 	private $logger;
 	/** @var Updater */
 	private $updater;
+	/** @var Checker */
+	private $checker;
 
 	public function setUp() {
 		parent::setUp();
@@ -46,10 +49,14 @@ class UpdaterTest extends \Test\TestCase {
 		$this->logger = $this->getMockBuilder('\\OCP\\ILogger')
 			->disableOriginalConstructor()
 			->getMock();
+		$this->checker = $this->getMockBuilder('\OC\IntegrityCheck\Checker')
+				->disableOriginalConstructor()
+				->getMock();
 
 		$this->updater = new Updater(
 			$this->httpHelper,
 			$this->config,
+			$this->checker,
 			$this->logger
 		);
 	}
@@ -158,11 +165,11 @@ class UpdaterTest extends \Test\TestCase {
 	 *
 	 * @param string $oldVersion
 	 * @param string $newVersion
+	 * @param string $allowedVersion
 	 * @param bool $result
 	 */
 	public function testIsUpgradePossible($oldVersion, $newVersion, $allowedVersion, $result) {
-		$updater = new Updater($this->httpHelper, $this->config, $this->logger);
-		$this->assertSame($result, $updater->isUpgradePossible($oldVersion, $newVersion, $allowedVersion));
+		$this->assertSame($result, $this->updater->isUpgradePossible($oldVersion, $newVersion, $allowedVersion));
 	}
 
 	public function testCheckInCache() {
diff --git a/tests/settings/controller/CheckSetupControllerTest.php b/tests/settings/controller/CheckSetupControllerTest.php
index ebba18de5fd..08d4135fa12 100644
--- a/tests/settings/controller/CheckSetupControllerTest.php
+++ b/tests/settings/controller/CheckSetupControllerTest.php
@@ -21,7 +21,10 @@
 
 namespace OC\Settings\Controller;
 
+use OCP\AppFramework\Http;
+use OCP\AppFramework\Http\DataDisplayResponse;
 use OCP\AppFramework\Http\DataResponse;
+use OCP\AppFramework\Http\RedirectResponse;
 use OCP\Http\Client\IClientService;
 use OCP\IConfig;
 use OCP\IL10N;
@@ -29,6 +32,7 @@ use OCP\IRequest;
 use OCP\IURLGenerator;
 use OC_Util;
 use Test\TestCase;
+use OC\IntegrityCheck\Checker;
 
 /**
  * Mock version_compare
@@ -63,6 +67,8 @@ class CheckSetupControllerTest extends TestCase {
 	private $util;
 	/** @var IL10N */
 	private $l10n;
+	/** @var Checker */
+	private $checker;
 
 	public function setUp() {
 		parent::setUp();
@@ -86,6 +92,8 @@ class CheckSetupControllerTest extends TestCase {
 			->will($this->returnCallback(function($message, array $replace) {
 				return vsprintf($message, $replace);
 			}));
+		$this->checker = $this->getMockBuilder('\OC\IntegrityCheck\Checker')
+				->disableOriginalConstructor()->getMock();
 		$this->checkSetupController = $this->getMockBuilder('\OC\Settings\Controller\CheckSetupController')
 			->setConstructorArgs([
 				'settings',
@@ -95,6 +103,7 @@ class CheckSetupControllerTest extends TestCase {
 				$this->urlGenerator,
 				$this->util,
 				$this->l10n,
+				$this->checker,
 				])
 			->setMethods(['getCurlVersion'])->getMock();
 	}
@@ -351,6 +360,8 @@ class CheckSetupControllerTest extends TestCase {
 				'forwardedForHeadersWorking' => true,
 				'reverseProxyDocs' => 'reverse-proxy-doc-link',
 				'isCorrectMemcachedPHPModuleInstalled' => true,
+				'hasPassedCodeIntegrityCheck' => null,
+				'codeIntegrityCheckerDocumentation' => null,
 			]
 		);
 		$this->assertEquals($expected, $this->checkSetupController->check());
@@ -366,6 +377,7 @@ class CheckSetupControllerTest extends TestCase {
 				$this->urlGenerator,
 				$this->util,
 				$this->l10n,
+				$this->checker
 			])
 			->setMethods(null)->getMock();
 
@@ -596,4 +608,441 @@ class CheckSetupControllerTest extends TestCase {
 			->will($this->returnValue([]));
 		$this->assertSame('', $this->invokePrivate($this->checkSetupController, 'isUsedTlsLibOutdated'));
 	}
+
+	public function testRescanFailedIntegrityCheck() {
+		$this->checker
+			->expects($this->once())
+			->method('runInstanceVerification');
+		$this->urlGenerator
+			->expects($this->once())
+			->method('linkToRoute')
+			->with('settings_admin')
+			->will($this->returnValue('/admin'));
+
+		$expected = new RedirectResponse('/admin');
+		$this->assertEquals($expected, $this->checkSetupController->rescanFailedIntegrityCheck());
+	}
+
+	public function testGetFailedIntegrityCheckFilesWithNoErrorsFound() {
+		$this->checker
+			->expects($this->once())
+			->method('getResults')
+			->will($this->returnValue([]));
+
+		$expected = new DataDisplayResponse(
+				'No errors have been found.',
+				Http::STATUS_OK,
+				[
+						'Content-Type' => 'text/plain',
+				]
+		);
+		$this->assertEquals($expected, $this->checkSetupController->getFailedIntegrityCheckFiles());
+	}
+
+	public function testGetFailedIntegrityCheckFilesWithSomeErrorsFound() {
+		$this->checker
+				->expects($this->once())
+				->method('getResults')
+				->will($this->returnValue(array ( 'core' => array ( 'EXTRA_FILE' => array('/testfile' => array()), 'INVALID_HASH' => array ( '/.idea/workspace.xml' => array ( 'expected' => 'f1c5e2630d784bc9cb02d5a28f55d6f24d06dae2a0fee685f3c2521b050955d9d452769f61454c9ddfa9c308146ade10546cfa829794448eaffbc9a04a29d216', 'current' => 'ce08bf30bcbb879a18b49239a9bec6b8702f52452f88a9d32142cad8d2494d5735e6bfa0d8642b2762c62ca5be49f9bf4ec231d4a230559d4f3e2c471d3ea094', ), '/lib/private/integritycheck/checker.php' => array ( 'expected' => 'c5a03bacae8dedf8b239997901ba1fffd2fe51271d13a00cc4b34b09cca5176397a89fc27381cbb1f72855fa18b69b6f87d7d5685c3b45aee373b09be54742ea', 'current' => '88a3a92c11db91dec1ac3be0e1c87f862c95ba6ffaaaa3f2c3b8f682187c66f07af3a3b557a868342ef4a271218fe1c1e300c478e6c156c5955ed53c40d06585', ), '/settings/controller/checksetupcontroller.php' => array ( 'expected' => '3e1de26ce93c7bfe0ede7c19cb6c93cadc010340225b375607a7178812e9de163179b0dc33809f451e01f491d93f6f5aaca7929685d21594cccf8bda732327c4', 'current' => '09563164f9904a837f9ca0b5f626db56c838e5098e0ccc1d8b935f68fa03a25c5ec6f6b2d9e44a868e8b85764dafd1605522b4af8db0ae269d73432e9a01e63a', ), ), ), 'bookmarks' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'dav' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'encryption' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'external' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'federation' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_antivirus' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_drop' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_external' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_pdfviewer' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_sharing' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_trashbin' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_versions' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'files_videoviewer' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'firstrunwizard' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'gitsmart' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'logreader' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature could not get verified.', ), ), 'password_policy' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'provisioning_api' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'sketch' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'threatblock' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'two_factor_auth' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'user_ldap' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), 'user_shibboleth' => array ( 'EXCEPTION' => array ( 'class' => 'OC\\IntegrityCheck\\Exceptions\\InvalidSignatureException', 'message' => 'Signature data not found.', ), ), )));
+
+		$expected = new DataDisplayResponse(
+				'Technical information
+=====================
+The following list covers which files have failed the integrity check. Please read
+the previous linked documentation to learn more about the errors and how to fix
+them.
+
+Results
+=======
+- core
+	- EXTRA_FILE
+		- /testfile
+	- INVALID_HASH
+		- /.idea/workspace.xml
+		- /lib/private/integritycheck/checker.php
+		- /settings/controller/checksetupcontroller.php
+- bookmarks
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- dav
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- encryption
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- external
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- federation
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_antivirus
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_drop
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_external
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_pdfviewer
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_sharing
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_trashbin
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_versions
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- files_videoviewer
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- firstrunwizard
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- gitsmart
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- logreader
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature could not get verified.
+- password_policy
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- provisioning_api
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- sketch
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- threatblock
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- two_factor_auth
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- user_ldap
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+- user_shibboleth
+	- EXCEPTION
+		- OC\IntegrityCheck\Exceptions\InvalidSignatureException
+		- Signature data not found.
+
+Raw output
+==========
+Array
+(
+    [core] => Array
+        (
+            [EXTRA_FILE] => Array
+                (
+                    [/testfile] => Array
+                        (
+                        )
+
+                )
+
+            [INVALID_HASH] => Array
+                (
+                    [/.idea/workspace.xml] => Array
+                        (
+                            [expected] => f1c5e2630d784bc9cb02d5a28f55d6f24d06dae2a0fee685f3c2521b050955d9d452769f61454c9ddfa9c308146ade10546cfa829794448eaffbc9a04a29d216
+                            [current] => ce08bf30bcbb879a18b49239a9bec6b8702f52452f88a9d32142cad8d2494d5735e6bfa0d8642b2762c62ca5be49f9bf4ec231d4a230559d4f3e2c471d3ea094
+                        )
+
+                    [/lib/private/integritycheck/checker.php] => Array
+                        (
+                            [expected] => c5a03bacae8dedf8b239997901ba1fffd2fe51271d13a00cc4b34b09cca5176397a89fc27381cbb1f72855fa18b69b6f87d7d5685c3b45aee373b09be54742ea
+                            [current] => 88a3a92c11db91dec1ac3be0e1c87f862c95ba6ffaaaa3f2c3b8f682187c66f07af3a3b557a868342ef4a271218fe1c1e300c478e6c156c5955ed53c40d06585
+                        )
+
+                    [/settings/controller/checksetupcontroller.php] => Array
+                        (
+                            [expected] => 3e1de26ce93c7bfe0ede7c19cb6c93cadc010340225b375607a7178812e9de163179b0dc33809f451e01f491d93f6f5aaca7929685d21594cccf8bda732327c4
+                            [current] => 09563164f9904a837f9ca0b5f626db56c838e5098e0ccc1d8b935f68fa03a25c5ec6f6b2d9e44a868e8b85764dafd1605522b4af8db0ae269d73432e9a01e63a
+                        )
+
+                )
+
+        )
+
+    [bookmarks] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [dav] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [encryption] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [external] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [federation] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_antivirus] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_drop] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_external] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_pdfviewer] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_sharing] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_trashbin] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_versions] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [files_videoviewer] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [firstrunwizard] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [gitsmart] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [logreader] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature could not get verified.
+                )
+
+        )
+
+    [password_policy] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [provisioning_api] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [sketch] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [threatblock] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [two_factor_auth] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [user_ldap] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+    [user_shibboleth] => Array
+        (
+            [EXCEPTION] => Array
+                (
+                    [class] => OC\IntegrityCheck\Exceptions\InvalidSignatureException
+                    [message] => Signature data not found.
+                )
+
+        )
+
+)
+',
+				Http::STATUS_OK,
+				[
+						'Content-Type' => 'text/plain',
+				]
+		);
+		$this->assertEquals($expected, $this->checkSetupController->getFailedIntegrityCheckFiles());
+	}
 }