Difference between revisions of "MIB Exception List file"

Revision as of 10:18, 21 August 2020 (view source) Admin (talk | contribs) (→‎Fazit IDs) ← Older edit		Revision as of 13:12, 25 August 2020 (view source) Admin (talk | contribs) (→‎File names and locations) Newer edit →
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	== File names and locations ==		== File names and locations ==
		+	<ref>https://mhhauto.com/Thread-MIB2-vcrn</ref>
		+	<ref>https://rennlist.com/forums/991/1049794-porsche-pcm-upgrade-hack-for-android-auto-is-this-real-9.html#post16124795</ref>
		+	<ref>https://turbo-quattro.com/archive/index.php/t-24737.html</ref>
		+	<ref>https://github.com/askac/PorschePCMStuff/blob/master/MIB2_FEC_Generator.sh</ref>
		+	<ref>https://www.digital-eliteboard.com/threads/audi-mmi-mib2-mhi2-firmware-3634-3663-update-und-asi-apple-carplay-android-auto.480571/post-3810164</ref>
		+
	* /tsd/etc/slist/'''signed_exception_list.txt'''		* /tsd/etc/slist/'''signed_exception_list.txt'''
	* /HBpersistence/FEC/'''Exceptionlist.txt'''		* /HBpersistence/FEC/'''Exceptionlist.txt'''
−	* '''prodEL.txt'''	+	* /efs-persist/etc/'''prodEL.txt'''
	== File Content ==		== File Content ==

---

Revision as of 13:12, 25 August 2020

Purpose

File names and locations

^{[1] [2] [3] [4] [5]}

• /tsd/etc/slist/signed_exception_list.txt
• /HBpersistence/FEC/Exceptionlist.txt
• /efs-persist/etc/prodEL.txt

File Content

Fazit IDs

There's a mechanism that can secure the file and prohibit for using it in different device than it's intended to. Example: VVV-074DD.MM.YYZZZZZZZZ

• VVV = vendor or main unit code name
• DD = production day
• MM = production month
• YY = production year
• ZZZZZZZZ = VCRN

There seems to be a workaround mechanism by replacing characters with ?. That way we get ???-?????.??.?????????? which in theory should be accepted as valid by main units with different VCRNs and production dates.

Different main unit versions use different 3-character prefix. ^[6]

Boardbook data path

Destination = "/net/mmx/mnt/boardbook"
SigDestination = "/net/mmx/mnt/boardbook/RSDB"

PPOI data path

Destination = "/net/mmx/mnt/navdb/PersonalPOI"

List of supported FSCs

[SupportedFSC]
fsc = "00030000"
fsc2 = "00040100"
fsc3...

FEC can be provided as a range of values, for example fsc = "02100000;0210003F".

Signature

[Signature]
signature1 = ...

Parsing

Process tsd.mibstd2.system.swap checks the file, compares production date, VCRN, signature. If it's all OK, then it passes listed FEC codes ad valid.

Patching tsd.mibstd2.system.swap

Altering parts of this files code one can make it to skip the checking procedure and force it to pass FEC codes.

1. ↑ https://mhhauto.com/Thread-MIB2-vcrn
2. ↑ https://rennlist.com/forums/991/1049794-porsche-pcm-upgrade-hack-for-android-auto-is-this-real-9.html#post16124795
3. ↑ https://turbo-quattro.com/archive/index.php/t-24737.html
4. ↑ https://github.com/askac/PorschePCMStuff/blob/master/MIB2_FEC_Generator.sh
5. ↑ https://www.digital-eliteboard.com/threads/audi-mmi-mib2-mhi2-firmware-3634-3663-update-und-asi-apple-carplay-android-auto.480571/post-3810164
6. ↑ https://turbo-quattro.com/archive/index.php/t-24737.html