added scm-pam-plugin

plugins/scm-pam-plugin/src/main/java/sonia/scm/pam/PAMAuthenticationHandler.java

@@ -0,0 +1,237 @@
+/**
+ * Copyright (c) 2010, Sebastian Sdorra
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of SCM-Manager; nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * http://bitbucket.org/sdorra/scm-manager
+ *
+ */
+
+
+
+package sonia.scm.pam;
+
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
+
+import org.jvnet.libpam.PAM;
+import org.jvnet.libpam.PAMException;
+import org.jvnet.libpam.UnixUser;
+import org.jvnet.libpam.impl.CLibrary;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import sonia.scm.SCMContextProvider;
+import sonia.scm.plugin.ext.Extension;
+import sonia.scm.store.Store;
+import sonia.scm.store.StoreFactory;
+import sonia.scm.user.User;
+import sonia.scm.util.AssertUtil;
+import sonia.scm.web.security.AuthenticationHandler;
+import sonia.scm.web.security.AuthenticationResult;
+
+//~--- JDK imports ------------------------------------------------------------
+
+import java.io.IOException;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ *
+ * @author Sebastian Sdorra
+ */
+@Singleton
+@Extension
+public class PAMAuthenticationHandler implements AuthenticationHandler
+{
+
+  /** Field description */
+  public static final String TYPE = "pam";
+
+  /** the logger for PAMAuthenticationHandler */
+  private static final Logger logger =
+    LoggerFactory.getLogger(PAMAuthenticationHandler.class);
+
+  //~--- constructors ---------------------------------------------------------
+
+  /**
+   * Constructs ...
+   *
+   *
+   * @param factory
+   */
+  @Inject
+  public PAMAuthenticationHandler(StoreFactory factory)
+  {
+    store = factory.getStore(PAMConfig.class, TYPE);
+  }
+
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param request
+   * @param response
+   * @param username
+   * @param password
+   *
+   * @return
+   */
+  @Override
+  public AuthenticationResult authenticate(HttpServletRequest request,
+          HttpServletResponse response, String username, String password)
+  {
+    AssertUtil.assertIsNotEmpty(username);
+    AssertUtil.assertIsNotEmpty(password);
+
+    PAM pam = null;
+
+    try
+    {
+      pam = new PAM(config.getServiceName());
+    }
+    catch (PAMException ex)
+    {
+      logger.warn("could not load pam module", ex);
+    }
+
+    AuthenticationResult result = AuthenticationResult.NOT_FOUND;
+
+    if (pam != null)
+    {
+      if (CLibrary.libc.getpwnam(username) != null)
+      {
+        try
+        {
+          UnixUser user = pam.authenticate(username, password);
+
+          if (user != null)
+          {
+            result = new AuthenticationResult(new User(username, username,
+                    null));
+          }
+        }
+        catch (PAMException ex)
+        {
+          result = AuthenticationResult.FAILED;
+        }
+      }
+    }
+
+    return result;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @throws IOException
+   */
+  @Override
+  public void close() throws IOException
+  {
+
+    // do nothing
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @param context
+   */
+  @Override
+  public void init(SCMContextProvider context)
+  {
+    config = store.get();
+
+    if (config == null)
+    {
+      config = new PAMConfig();
+      store.set(config);
+    }
+  }
+
+  /**
+   * Method description
+   *
+   */
+  public void storeConfig()
+  {
+    store.set(config);
+  }
+
+  //~--- get methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  public PAMConfig getConfig()
+  {
+    return config;
+  }
+
+  /**
+   * Method description
+   *
+   *
+   * @return
+   */
+  @Override
+  public String getType()
+  {
+    return TYPE;
+  }
+
+  //~--- set methods ----------------------------------------------------------
+
+  /**
+   * Method description
+   *
+   *
+   * @param config
+   */
+  public void setConfig(PAMConfig config)
+  {
+    this.config = config;
+  }
+
+  //~--- fields ---------------------------------------------------------------
+
+  /** Field description */
+  private PAMConfig config;
+
+  /** Field description */
+  private Store<PAMConfig> store;
+}