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Instead of maintaining the reversing tools for Abbott FreeStyle devices in
this repository, they are now part of their own project
(https://github.com/glucometers-tech/freestyle-hid), making it easier to
split the dependencies requirements.
The basic I/O of the FreeStyle session is also implemented in that library.
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The sequence number and MAC are not actually encrypted, so they can be
extracted as METADATA.
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This makes it easier to figure out what the message length is meant to be.
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This is following the advice provided in https://matija.suklje.name/how-and-why-to-properly-write-copyright-statements-in-your-code
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This includes changes to the flags, so that instead of an address prefix
you need to provide a full device address, and instead of `--libre2`,
there's a `--encrypted_protocol` flag.
If the capture includes the descriptors, neither flags are needed because
the script identifies them itself.
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These messages are not encrypted, but they can also be safely ignored.
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This encodes some more details of which commands are encrypted and not, but
makes decoding easier.
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The tool needs https://github.com/Flameeyes/usbmon-tools to work, and is
derived off the extract-hid-chatter tool in that repository, so it's
Apache-2 licensed (unlike the rest of the repository) and shares copyright
with the usbmon-tools authors.
While this does not work correctly for Libre2 traces, it does appear to
work fine with Libre1 systems with text protocol exchanges, and it provides
a starting point.
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