[JENKINS-47372] Add a new Administrative monitor for CSRF-protection (#…

…3072)

* [JENKINS-47372] add administrative monitor when there is no CSRF issuer configured

* - add line breaks

* - add license header
- put link in the properties instead of the previous mix
- remove @author
- simplify isActivated body

* - correct line breaks

core/src/main/java/jenkins/security/csrf/CSRFAdministrativeMonitor.java

@@ -0,0 +1,51 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2017, CloudBees, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package jenkins.security.csrf;
+
+import hudson.Extension;
+import hudson.model.AdministrativeMonitor;
+import jenkins.model.Jenkins;
+import org.jenkinsci.Symbol;
+import org.kohsuke.accmod.Restricted;
+import org.kohsuke.accmod.restrictions.NoExternalUse;
+
+/**
+ * Monitor that the CSRF protection is enabled on the application.
+ *
+ * @since TODO
+ */
+@Extension
+@Symbol("csrf")
+@Restricted(NoExternalUse.class)
+public class CSRFAdministrativeMonitor extends AdministrativeMonitor {
+    @Override
+    public String getDisplayName() {
+        return Messages.CSRFAdministrativeMonitor_displayName();
+    }
+
+    @Override
+    public boolean isActivated() {
+        return Jenkins.getInstance().getCrumbIssuer() == null;
+    }
+}

core/src/main/resources/jenkins/security/csrf/CSRFAdministrativeMonitor/message.jelly

@@ -0,0 +1,29 @@
+<!--
+The MIT License
+
+Copyright (c) 2017, CloudBees, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+-->
+<?jelly escape-by-default='true'?>
+<j:jelly xmlns:j="jelly:core">
+    <div class="warning">
+        ${%warningMessage(rootURL)}
+    </div>
+</j:jelly>

core/src/main/resources/jenkins/security/csrf/CSRFAdministrativeMonitor/message.properties

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+warningMessage=You have not configured the CSRF issuer. This could be a security issue. \
+  For more information, please refer to <a href="https://jenkins.io/redirect/csrf-protection" target="_blank">this page</a>. \
+  <br /> \
+  You can change the current configuration using the Security section <a href="{0}/configureSecurity">CSRF Protection</a>.

core/src/main/resources/jenkins/security/csrf/Messages.properties

@@ -0,0 +1 @@
+CSRFAdministrativeMonitor.displayName=CSRF Protection Monitor

test/src/test/java/jenkins/security/csrf/CSRFAdministrativeMonitorTest.java

@@ -0,0 +1,58 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2017, CloudBees, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package jenkins.security.csrf;
+
+import hudson.model.AdministrativeMonitor;
+import hudson.security.csrf.DefaultCrumbIssuer;
+import org.junit.Rule;
+import org.junit.Test;
+import org.jvnet.hudson.test.Issue;
+import org.jvnet.hudson.test.JenkinsRule;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+public class CSRFAdministrativeMonitorTest {
+
+    @Rule
+    public JenkinsRule j = new JenkinsRule();
+
+    @Test
+    @Issue("JENKINS-47372")
+    public void testWithoutIssuer() {
+        j.jenkins.setCrumbIssuer(null);
+
+        CSRFAdministrativeMonitor monitor = j.jenkins.getExtensionList(AdministrativeMonitor.class).get(CSRFAdministrativeMonitor.class);
+        assertTrue("Monitor must not be activated", monitor.isActivated());
+    }
+
+    @Test
+    @Issue("JENKINS-47372")
+    public void testWithIssuer() {
+        j.jenkins.setCrumbIssuer(new DefaultCrumbIssuer(false));
+
+        CSRFAdministrativeMonitor monitor = j.jenkins.getExtensionList(AdministrativeMonitor.class).get(CSRFAdministrativeMonitor.class);
+        assertFalse("Monitor must be activated", monitor.isActivated());
+    }
+}