1 files changed, 126 insertions, 0 deletions
diff --git a/src/main/java/com/gitblit/auth/PAMAuthProvider.java b/src/main/java/com/gitblit/auth/PAMAuthProvider.java
new file mode 100644
index 00000000..bbc82d84
--- /dev/null
+++ b/src/main/java/com/gitblit/auth/PAMAuthProvider.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2013 gitblit.com.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.gitblit.auth;
+
+import java.io.File;
+
+import org.jvnet.libpam.PAM;
+import org.jvnet.libpam.PAMException;
+import org.jvnet.libpam.impl.CLibrary;
+
+import com.gitblit.Constants;
+import com.gitblit.Constants.AccountType;
+import com.gitblit.Keys;
+import com.gitblit.auth.AuthenticationProvider.UsernamePasswordAuthenticationProvider;
+import com.gitblit.models.UserModel;
+import com.gitblit.utils.ArrayUtils;
+import com.gitblit.utils.StringUtils;
+
+/**
+ * Implementation of PAM authentication for Linux/Unix/MacOSX.
+ *
+ * @author James Moger
+ */
+public class PAMAuthProvider extends UsernamePasswordAuthenticationProvider {
+
+    public PAMAuthProvider() {
+        super("pam");
+    }
+
+    @Override
+    public void setup() {
+        // Try to identify the passwd database
+        String [] files = { "/etc/shadow", "/etc/master.passwd" };
+		File passwdFile = null;
+		for (String name : files) {
+			File f = new File(name);
+			if (f.exists()) {
+				passwdFile = f;
+				break;
+			}
+		}
+		if (passwdFile == null) {
+			logger.error("PAM Authentication could not find a passwd database!");
+		} else if (!passwdFile.canRead()) {
+			logger.error("PAM Authentication can not read passwd database {}! PAM authentications may fail!", passwdFile);
+		}
+    }
+
+    @Override
+    public boolean supportsCredentialChanges() {
+        return false;
+    }
+
+    @Override
+    public boolean supportsDisplayNameChanges() {
+        return true;
+    }
+
+    @Override
+    public boolean supportsEmailAddressChanges() {
+        return true;
+    }
+
+    @Override
+    public boolean supportsTeamMembershipChanges() {
+        return true;
+    }
+
+	 @Override
+	public AccountType getAccountType() {
+		return AccountType.PAM;
+	}
+
+    @Override
+    public UserModel authenticate(String username, char[] password) {
+		if (CLibrary.libc.getpwnam(username) == null) {
+			logger.warn("Can not get PAM passwd for " + username);
+			return null;
+		}
+
+		PAM pam = null;
+		try {
+			String serviceName = settings.getString(Keys.realm.pam.serviceName, "system-auth");
+			pam = new PAM(serviceName);
+			pam.authenticate(username, new String(password));
+		} catch (PAMException e) {
+			logger.error(e.getMessage());
+			return null;
+		} finally {
+			pam.dispose();
+		}
+
+        UserModel user = userManager.getUserModel(username);
+        if (user == null)	// create user object for new authenticated user
+        	user = new UserModel(username.toLowerCase());
+
+        // create a user cookie
+        if (StringUtils.isEmpty(user.cookie) && !ArrayUtils.isEmpty(password)) {
+        	user.cookie = StringUtils.getSHA1(user.username + new String(password));
+        }
+
+        // update user attributes from UnixUser
+        user.accountType = getAccountType();
+        user.password = Constants.EXTERNAL_ACCOUNT;
+
+        // TODO consider mapping PAM groups to teams
+
+        // push the changes to the backing user service
+        updateUser(user);
+
+        return user;
+    }
+}