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The OcfaLib API is a C++ API that is meant for usage by modules in the Open Computer Forensics Architecture. The C++ class ocfa::module::OcfaModule defines the base class of what all OCFA modules are derived. Depending on the type of module, the ocfa::facade namespace provides different convenient subclasses. The OcfaModule class defines a virtual function named ProcessEvidence that the final module class must implement. A typical module implementation implements a subclass by implementing a constructor and a ProcessEvidence method. The main function of the module program will create an instance of the module class and call the run method on the object. The module will connect and register itself to the OCFA Anycast Relay and thus be connected into the Open Computer Forensics Architecture. For each piece of evidence data the module receives, the ProcessEvidence method will get invoked. The implementation of the ProcessEvidence method can depending on the type of facade used as baseclass can:
- Gain read access to the input evidence data.
- Use its own private workdir for derived and temporary data
- Derive evidence from the input evidence.
- Access meta data created by other modules.
- Add additional metadata to the input evidence or child evidences.
The only API available currently is the C++ API. Work is currently being done to also create a Java API and plans exist to build a Perl API to OCFA in the future.