Uweheuer

Concept

Encryption

Notes are encrypted by own algorithm implemented in Present.js and Present.java. Encryption works by a logical OR of a single character with a token (indiscernible) and represent the result as a 3 letter block consisting of a the character code with base 25 and filling the rest up randomly with a character of a list of p-z.

To check if the service callers are authorized, the actual timestamp is send uncrypted (haze) and encrypted (camouflage). On the server it is checked that the decrypted camouflage is equal to haze.

Bookmark comments are encrypted by AES. Client-side decryption is done by CryptoJS (in detail aes.js and mode-ecb-min.js are used from the downloaded zip-file).

1. fool = user
2. indiscernible = (unsichtbar) private token to hash a note
3. camouflage = (Tarnung); hashed string; consists of chunks of 3 chars, the last chars are the XOR of string to hash and key converted to base 25 filled up to 3 with random letters not used in base.
4. haze = (Nebel) actual timestamp
5. bft = (AES) private token to hash bookmark comments (JS: amFrb2J0aGltbzEyMzQ1Ng==, Java on server and client (Crypt.java): jakobthimo123456)
6. notepresent = package of present and camouflaged note
7. present = package of fool, haze, camouflage of haze; used to verify if the notepresent sent was camouflaged correctly and valid, by checking if the unwrapped camouflage is equal to haze

Bookmarks

• root node identified by name = 'My Bookmarks' or id = 1

Tree Versioning

1. bookmark tree version is set to latest update version

Tooltip

• implemented by using PowerTip

Notes

Saving a note

• see sequence diagram onSaveNoteButtonTapped()

Documentation

1. s. <PROJECT_DIR>/doc/uweheuer.vsd
2. s. <PROJECT_DIR>/vpproject/uweheuer.vpp

Interfaces

Web Services

Web Services are implemented with Axis. The source files for the classes are in package server.webservices. Callbacks and stubs have been generated long time ago (see automatic comment in generated files) and needed for client implementations. The application acts as a web service client while doing synchronization. WSDL files are generated by target gen_wsdl but are not used.

Initial Installation

Create and fill database mysql505 per mysql tools. Copy war-file or directory tree to the webapp directory of the application server. Adjust Apache or Tomcat for proxying to JBoss (HomePCNew#Apache)

Persistence

• DB configuration see <PROJECT_DIR>\src\WEB-INF\classes\META-INF\persistence.xml and JBoss configuration, which defines the driver and the database connection string, which includes the DB name
• EntityManagementUtil creates two EntityManagerFactories, one for bookmarks (definition see persistence.xml) and one for uweswiki (definition see persistence.xml)

Synchronization

• see sequence diagram 'Synchronization'
• init configuration in web.xml

Releases

• Migration from Axis 1 to Axis 2
• Migration from Hibernate to JPA implemented by Hibernate
• Migration from Runtime JBoss 4.2 to JBoss 7.1

Generierung and Deployment

Die Generierung erfolgt über Ant (s. build.xml and Documentation->Build Process).

Shell

ant [deploy_laptop_jboss7|deploy_home|deploy_vserverjboss7]

Eclipse

Project -> Build Project ruft das target deploy_laptop auf.

Update Applet

• press x (clear class loader cache) in java console
• press 'Bookmark Applets' in menu

Crypt Data Handling

Die Generierung eines leeren Data-Files namens 'data.crypt' erfolgt über das Kommando:

C:\Uwes\eclipse\workspace\uweheuer\build\class>java server.CreateCryptDataFile.

Die Datei muss in das Verzeichnis <TOMCAT_HOME>/webapps/uweheuer/data kopiert werden z.B. mit

C:\Uwes\eclipse\workspace\uweheuer\build\class>copy data.crypt \Uwes\xampp\tomcat\webapps\uweheuer\data

Contacts

Update Contacts on Local Laptop

• open C:\Uwes\WinScripts\ExportOutlookContactsbyVBA4Excel.xlsm
• open Entwicklertools->Visual Basic and start Makro OutlookContactsToExcelWorksheet2 per Icon in top menu bar or
• Ansicht -> Makros

=> this will create the file C:\Uwes\Programme\Java\JBoss\standalone\data\uweheuer\OutlookContactExportbyVBA4Excel.csv

• call web service http://localhost:8090/uweheuer/services/ContactServices?UpdateContactsFromServerFile

Logging and Debuging

Logging

Server-side logging configuration is done via configuration in JBoss. The configuration is:

• Configuration->Core->Logging->Log category 'uweheuer', Log Level 'INFO', handler 'uweheuer_periodic_file_handler'
• Periodic handler 'uweheuer_periodic_file_handler', log level 'INFO', formatter '%d{HH:mm:ss,SSS} %-5p [%c] %C.%M() %s%E%n', ...

The coding uses LogUtil.java an the static method. It creates a logger named uweheuer which is used through out the code and which has the same name as the log category.

Logging on the client side is done via the printDebug() method, which goes at least to the java console.

Eclipse Debugging

• debug server by JBoss
• debug applet by Run -> Debug configurations -> Java Applet -> Debug TunnelAppletx