My Choiche of WordPress Plugins


WordPress ouImage result for plugint of the box is already a very good blogging engine. However there are still a lot of features, lacking in the standard version if we want to have a smooth editing workflow and good user experience for the reader. WordPress takes care for the necessary extension of functionality with its plug-in framework and there are hundreds of plug-ins available.
Here is quick run down of the plug-ins that I use. Since I don’t want to dive into WordPress programming, but rather use the product to run my blog and website without much trouble, I am looking only for standard mainstream plugins with a wide usage. Like in many other fields, this strategy normally yields quick success with little problems. 

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Web Single Sign-On with SAML 2.0

While SAML is already widely used in the industry, the configuration within Weblogic
Server is complex and in most companies not part of the regular routine. We want to have look at a simple SAML example that was published in an article by VikrantSawant in 2007. This former example demonstrates a Web
SSO scenario using SAML 1.1 in Weblogic Server 9.2.
We want to upgrade this example, using SAML 2.0 in Weblogic Server 12.1.3.
This is a tutorial in which we will walk through all the necessary steps to setup and run the SAML 2.0 example. This includes the installation and configuration of weblogic server, creation of two weblogic server domains, installation of the test applications and configuration of the identity provider and service provider domains. To provide a comprehensive overview, the separate tutorial steps are summarized in mind map diagrams. The tutorial comprises a ServiceProvider initiated flow and an Identity Provider initiated flow, which both will be demonstrated during the testing steps. As an addition, the tutorial demonstrates the usage of the weblogic feature “virtual user”.

„Web Single Sign-On with SAML 2.0“ weiterlesen

Calculating Checksums for Oracle Downloads

Checksums for Oracle Downloads

It took me
quite a while to figure out which check sum algorithm Oracle is using on some
of its download pages. E.g. on the OSB download page, we find the comment “Oracle
Service Bus Size: 1.06 GB, Check Sum:1490338751”
This check
sum is generated by the old unix tool cksum, which protects for accidental
corruption during transport, however is not cryptographically secure. See
for more details.
On Windows
we can use cksum.exe which is included in win32 tools from the project win-bash
(  Calculating the check sum for the OSB
download on my machine yields:
The first
number is the CRC value which matches the value from the oracle website and the
second value is the size in bytes.

Oracle Identity Manager: The Active Directory Connector Tutorial


    In this tutorial we demonstrate the usage of the Active Directory Connector, which integrates a Microsoft Active Directory into Oracle Identity Manager. The underlying scenario is the integration as a result of a company acquisition. All users of the Active Directory are transferred to OIM, which is then used for user management and provisioning of AD accounts. This tutorial includes the installation and configuration of Windows Server and Active Directory, as well as the installation and configuration of the AD connector. We will create an AD structure, using organizational units, users, groups, GPOs (group policy objects) and directory access writes, to model a non-trivial scenario which emulates a real world installations. While we keep the total system still simple, the complexity is already at a level which reveals usability aspects of the connector, which are beyond a mere technical proving of concept. A conclusion summarizes this work and points to areas of further study.

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Installation of the Oracle Identity Manger


The installation of the Oracle Identity Manager 11g is quite complex and contains some pitfalls that require problem analysis and investigations. In this tutorial we will lead through the installation process of all required product components and development tools. We point out necessary troubleshooting steps and include the analysis of some of the problems. We also provide a detailed list of required installation packages and patches. While analysis during this work was rather time consuming, following the documented steps that circumvent the pitfalls can save a lot of time.

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Oracle Forms and Reports Quick start

During the summer I needed to quickly work myself into Oracle Forms for a business opportunity and I decided to share my experience in form of this quick start guide.
We will look at the installation process on Windows and Linux in a development and production configuration. To work with the Forms samples we install an Oracle Express Edition Database. We will look at the basic operations and a database tutorial to get acquainted with this edition. We also look at an Application Express Example, Oracle’s quick and simple approach to database applications. We will use the development configuration to run through the Forms tutorial “Creating a Master-Detail Form”, which ships with the product. Eventually we will look at a Forms and Reports installation in a high-availability configuration. We propose a setup on two virtual box Linux machines and provide an action plan for its installation.

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Upgrading Vista to Windows 8 on Virtual Box


I still have an old
Windows Vista license which I installed on an Oracle Virtual Box machine.
However it performs so poorly that it is hardly usable, even on a modern quad
core CPU system. Yesterday Microsoft offered an Upgrade from several Windows
versions, including Vista, to Windows 8 Pro for 29,90  Euro. I decided to try an upgrade.

  „Upgrading Vista to Windows 8 on Virtual Box“ weiterlesen

Installation of Oracle Linux 5.8 on Virtual Box 4.1 with Guest Additions

Today I wanted to install
Oracle Linux on virtual box, which I need for some testing systems. Since the
installation and especially the setup of the guest additions were not as smooth
as I expected, I decided to share the information.

InstallingOracleLinux58.pdf (1.5 MByte)

This is the text-only preview. Please open the PDF file for full formatting and pictures.

„“ weiterlesen

WS-Security unveiled


One of the more
complex examples that ship with WLS is a WS-Trust based authentication of a web
service using SAML assertions. This example is quite easy to setup and run and
the example’s documentation gives a basic understanding of what is going on.
But we want to look deeper and shed light on the complexity that is hidden
behind SSL, WS-Trust and SAML authentication. In a first step we separate the
scenario from the example server and integrate it into eclipse, to create an
isolated laboratory environment for further investigation. We will use
Wireshark to analyze the actual flow of messages on the wire. We even look
inside the SSL streams to identify the WS-Trust tokens and SAML assertions as
they are passed between the participants.

„WS-Security unveiled“ weiterlesen

Toolbox: The Mini-ID


This part of the
toolbox series introduces the Mini-IDE project. It is designed to instantly
setup a weblogic server together with a small sample application. It provides everything
to setup and run the example in less than five minutes. Despite its simplicity,
it contains everything to build and deploy a Java EE web application, relying
on not more than a WLS installation. It can easily be modified and used in
analysis situations or as a starting point for proof of concepts. In environments
where access is restricted to shell usage, we provide a distribution method
based on copy and paste via the clipboard.