1 files changed, 102 insertions, 0 deletions
diff --git a/java/com/google/gerrit/server/auth/ldap/LdapAuthBackend.java b/java/com/google/gerrit/server/auth/ldap/LdapAuthBackend.java
new file mode 100644
index 0000000000..f31954e6e1
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+++ b/java/com/google/gerrit/server/auth/ldap/LdapAuthBackend.java
@@ -0,0 +1,102 @@
+// Copyright (C) 2012 The Android Open Source Project
+//
+// 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.google.gerrit.server.auth.ldap;
+
+import com.google.common.flogger.FluentLogger;
+import com.google.gerrit.extensions.client.AuthType;
+import com.google.gerrit.server.account.AccountException;
+import com.google.gerrit.server.auth.AuthBackend;
+import com.google.gerrit.server.auth.AuthException;
+import com.google.gerrit.server.auth.AuthRequest;
+import com.google.gerrit.server.auth.AuthUser;
+import com.google.gerrit.server.auth.InvalidCredentialsException;
+import com.google.gerrit.server.auth.MissingCredentialsException;
+import com.google.gerrit.server.auth.UnknownUserException;
+import com.google.gerrit.server.auth.UserNotAllowedException;
+import com.google.gerrit.server.config.AuthConfig;
+import com.google.gerrit.server.config.GerritServerConfig;
+import com.google.inject.Inject;
+import java.io.IOException;
+import java.util.Locale;
+import javax.naming.NamingException;
+import javax.naming.directory.DirContext;
+import javax.security.auth.login.LoginException;
+import org.eclipse.jgit.lib.Config;
+
+/** Implementation of AuthBackend for the LDAP authentication system. */
+public class LdapAuthBackend implements AuthBackend {
+  private static final FluentLogger logger = FluentLogger.forEnclosingClass();
+
+  private final Helper helper;
+  private final AuthConfig authConfig;
+  private final boolean lowerCaseUsername;
+
+  @Inject
+  public LdapAuthBackend(Helper helper, AuthConfig authConfig, @GerritServerConfig Config config) {
+    this.helper = helper;
+    this.authConfig = authConfig;
+    this.lowerCaseUsername = config.getBoolean("ldap", "localUsernameToLowerCase", false);
+  }
+
+  @Override
+  public String getDomain() {
+    return "ldap";
+  }
+
+  @Override
+  public AuthUser authenticate(AuthRequest req)
+      throws MissingCredentialsException, InvalidCredentialsException, UnknownUserException,
+          UserNotAllowedException, AuthException {
+    if (!req.getUsername().isPresent() || !req.getPassword().isPresent()) {
+      throw new MissingCredentialsException();
+    }
+
+    String username =
+        lowerCaseUsername
+            ? req.getUsername().map(u -> u.toLowerCase(Locale.US)).get()
+            : req.getUsername().get();
+    try {
+      final DirContext ctx;
+      if (authConfig.getAuthType() == AuthType.LDAP_BIND) {
+        ctx = helper.authenticate(username, req.getPassword().get());
+      } else {
+        ctx = helper.open();
+      }
+      try {
+        final Helper.LdapSchema schema = helper.getSchema(ctx);
+        final LdapQuery.Result m = helper.findAccount(schema, ctx, username, false);
+
+        if (authConfig.getAuthType() == AuthType.LDAP) {
+          // We found the user account, but we need to verify
+          // the password matches it before we can continue.
+          //
+          helper.close(helper.authenticate(m.getDN(), req.getPassword().get()));
+        }
+        return new AuthUser(AuthUser.UUID.create(username), username);
+      } finally {
+        helper.close(ctx);
+      }
+    } catch (AccountException e) {
+      logger.atSevere().withCause(e).log("Cannot query LDAP to authenticate user");
+      throw new InvalidCredentialsException("Cannot query LDAP for account", e);
+    } catch (IOException | NamingException e) {
+      logger.atSevere().withCause(e).log("Cannot query LDAP to authenticate user");
+      throw new AuthException("Cannot query LDAP for account", e);
+    } catch (LoginException e) {
+      logger.atSevere().withCause(e).log("Cannot authenticate server via JAAS");
+      throw new AuthException("Cannot query LDAP for account", e);
+    }
+  }
+}