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Update on Overleaf.

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nb72soza Bittner
2025-05-19 17:25:49 +00:00
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15
Chapters/Implementation.tex
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@@ -21,20 +21,27 @@
% - oss-fuzz proposes python hypothesis as a framework for fuzzing via python
% - python hypothesis: property based testing library -> we define input structure and hypothesis produces data that is valid for the given structure
% - tests for edge cases
% - in the following section i will go into details on how each implementation works
% - in the following sections i will go into details on how each implementation work
\section{Tracing}
\label{sec:tracing}
% functions:
% - trace traffic from the simtrace2, map the traffic to function calls i.e. identify which function the call handles, record the traced traffic
% - replay: replay the previously recorded traffic to euicc in pcsc reader, check
% - replay: replay the previously recorded traffic to euicc in pcsc reader, check for differences in responses
% parts:
% - card:
% - pcsc_link: wrapper for the python smartcard library, handles session establishment to reader, and apdu/tpdu transmission, automatically handles requesting of available data i.e. status word 61XX
% - card: represents card in the pcsc card reader, identifies card type (i.e sgp22, sgp.22 test, normal sim, etc) and which applications are installed (ISDR, ECASD, etc), used to send apdus to pcsc card through pcsc link
% - tracer: dummy implementation of card for instruction interpretation and apdu parsing, uses pysim gsmtap as apdu source
% - recorder: handles tracer thread and recording of apdus, starts tracer main thread (continously listens for new apdus from gsmtap until timeout is reached or canceld by user) and records apdu to recording, has target isd-r as argument
% - recording: represents a list of recorded apdus, handles source and target isd-r addresses, file saving and loding as well as checking if the file is replayable
% - replay: establishes connection to pcsc via pcsc link, loads recorded apdus and sends them over the link to the connected euicc, switches out source isd-r and target isd-r during replay, compares response status word to recorded status word on prints an error if there is a difference
\section{LPA}
\label{sec:lpa}
%
\section{Fuzzing}
\label{sec:fuzzing}
@@ -46,5 +53,3 @@
\section{CLI}
\label{sec:cli}
\lipsum[4]