From 0048997b91e3fb4502c8c754b1c9ddd9fc8c4700 Mon Sep 17 00:00:00 2001
From: Nils Schwabe
Date: Mon, 5 May 2014 16:26:07 +0200
Subject: Add user auth when ldap server is down

---
 .../org/openslx/imagemaster/db/DbSatellite.java    |  9 ++++++
 .../java/org/openslx/imagemaster/db/LdapUser.java  | 33 +++++++++++++++++++---
 .../openslx/imagemaster/session/Authenticator.java | 10 +++++--
 3 files changed, 45 insertions(+), 7 deletions(-)

(limited to 'src/main/java/org/openslx')

diff --git a/src/main/java/org/openslx/imagemaster/db/DbSatellite.java b/src/main/java/org/openslx/imagemaster/db/DbSatellite.java
index e6c8e03..2b155cf 100644
--- a/src/main/java/org/openslx/imagemaster/db/DbSatellite.java
+++ b/src/main/java/org/openslx/imagemaster/db/DbSatellite.java
@@ -41,4 +41,13 @@ public class DbSatellite
 	public String getPrefix() {
 		return this.prefix;
 	}
+
+	public static DbSatellite fromPrefix( String prefix )
+	{
+		return MySQL
+				.findUniqueOrNull(
+						DbSatellite.class,
+						"SELECT satellite.organization, satellite.address, satellite.name, satellite.prefix FROM satellite WHERE satellite.prefix = ? LIMIT 1",
+						prefix );
+	}
 }
diff --git a/src/main/java/org/openslx/imagemaster/db/LdapUser.java b/src/main/java/org/openslx/imagemaster/db/LdapUser.java
index f9554c0..ae6aae2 100644
--- a/src/main/java/org/openslx/imagemaster/db/LdapUser.java
+++ b/src/main/java/org/openslx/imagemaster/db/LdapUser.java
@@ -52,9 +52,10 @@ public class LdapUser extends User
 	 */
 	public static LdapUser forLogin( final String login, final String password ) throws AuthenticationException
 	{
-		String username, organization, firstName, lastName, eMail, satelliteAddress;
+		String username, organization, firstName, lastName, eMail, satelliteAddress = "";
 		
-		if (login.split( "_" ).length != 2)
+		final String[] split = login.split( "_" );
+		if (split.length != 2)
 			throw new AuthenticationException(AuthenticationError.GENERIC_ERROR, "Login must be in form: prefix_username");
 		
 		LdapConnection connection = null;
@@ -117,6 +118,13 @@ public class LdapUser extends User
 			// everything went fine
 			return new LdapUser( 0, username, Sha512Crypt.Sha512_crypt( password, null, 0 ), organization, firstName, lastName, eMail, satelliteAddress );
 		} catch ( LdapException e) {
+			if ( e.getMessage().contains( "Cannot connect on the server" ) ) {
+				DbSatellite dbSatellite = DbSatellite.fromPrefix(split[0]);
+				if (dbSatellite == null) throw new AuthenticationException(AuthenticationError.INVALID_CREDENTIALS, "Credentials invalid.");
+				String lo = split[1] + "@" + dbSatellite.getOrganization();
+				log.info( "LDAP server could not be reached. Trying to connect locally with: " + lo );
+				return LdapUser.localLogin(lo, password);
+			}
 			e.printStackTrace();
 			throw new AuthenticationException( AuthenticationError.GENERIC_ERROR, "Something went wrong." );
 		} catch ( CursorException e ) {
@@ -137,10 +145,27 @@ public class LdapUser extends User
 				connection.unBind();
 				connection.close();
 			} catch ( IOException | LdapException e ) {
-				e.printStackTrace();
-				throw new AuthenticationException( AuthenticationError.GENERIC_ERROR, "Something went very wrong." );
+				// was not connected so don't do anything...
 			}
 		}
 		return null;
 	}
+
+	/**
+	 * Login user locally if external Ldap server is not available
+	 * @param username Must be in form "userid@organization"
+	 * @param password The user's password
+	 */
+	private static LdapUser localLogin( String login, String password )
+	{
+		DbUser user = DbUser.forLogin( login );
+		if (user == null) return null; // no user found
+		
+		// check users password
+		if (!Sha512Crypt.verifyPassword( password, user.password )) return null;
+		
+		// return ldapuser if valid
+		return new LdapUser( user.userId, user.username, Sha512Crypt.Sha512_crypt( password, null, 0 ), user.organization, user.firstName,
+					user.lastName, user.eMail, user.satelliteAddress );
+	}
 }
diff --git a/src/main/java/org/openslx/imagemaster/session/Authenticator.java b/src/main/java/org/openslx/imagemaster/session/Authenticator.java
index 85f56b2..0796188 100644
--- a/src/main/java/org/openslx/imagemaster/session/Authenticator.java
+++ b/src/main/java/org/openslx/imagemaster/session/Authenticator.java
@@ -30,20 +30,24 @@ public class Authenticator
 		
 		String login = username;
 		if (username.split( "@" ).length == 2) {
+			log.info( "username is in username@organization format" );
 			// we are in userid@organization format
 			// --> get prefix
 			DbSatellite satellite = DbSatellite.fromOrganization( username.split( "@" )[1] );
 			if (satellite == null)
-				throw new AuthenticationException( AuthenticationError.INVALID_CREDENTIALS, "Unkown Organization" );
+				throw new AuthenticationException( AuthenticationError.INVALID_CREDENTIALS, "Unkown Organization." );
 			login = satellite.getPrefix() + "_" + username.split( "@" )[0];
+		} else if (username.split( "_" ).length != 2) {
+			log.info( "username is not in a valid format." );
+			throw new AuthenticationException(AuthenticationError.INVALID_CREDENTIALS, "Credentials must be in (username@organization) or (prefix@username)");
 		}
 
-		log.info( "Loggin in with: " + login );
+		log.info( "Logging in with: " + login );
 		
 		LdapUser user = LdapUser.forLogin( login, password ); // throws exception if credentials are invalid
 		if ( user == null ) {
 			log.debug( "Login failed: " + username );
-			throw new AuthenticationException( AuthenticationError.GENERIC_ERROR, "Could not login because of a weird error." );
+			throw new AuthenticationException( AuthenticationError.GENERIC_ERROR, "Something went wrong." );
 		}
 		log.debug( "Login succesful: " + username );
 
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