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codeclicence is an AVM internal tool to set or get the hidden licence keys for nonfree VoIP Codecs like G.729.
It was never part of any release firmware or Labor, but it leaked in exactly 2 english (likely ISP dedicated) Labor files.

The keys are stored in the hidden TFFS-Configuration files codec0 and codec1, without any defaults in ADAM2 / EVA.
A Recovery.exe preserves these keys while cleaning and recreating the TFFS, see the get-codecs feature.

The keys use AES128 encryption, provided by libavmcipher.so. Programs which access them use the low-level libtffs.so.
libtffs.so is used by codeclicence, dect_manager, run_clock, telefon and voipd. But only codeclicence and voipd use
libavmcipher.so and contain the AES128 passphrases, so the keys are only for voipd, as expected.

Fw 4.07 help:

usage: codeclicence [value]

Functions used:




Daily updated index of all dependencies of this command. Last update: 2022-11-26 07:14 GMT.
A * in the Mod column marks info from Supportdata-Probes, which will always stay incomplete.

Relation Typ Object Mod Firmware Info Origin
Depends on lib libavmcipher.so 2 3.93 - 4.07 AES / DES / Rijndael encryption / decryption. AVM
Depends on lib libc.so 2 3.93 - 4.07 Standard C library Linux
Depends on lib libtffs.so 2 3.93 - 4.07 Low-level access to the TFFS-Configuration AVM
3 dependencies for this command


Daily updated index of the presence, path and size of this command for each model. Last update: 2022-11-26 05:51 GMT.
Showing all models using this command. Click any column header (click-wait-click) to sort the list by the respective data.
The (main/scrpn/boot/arm/prx/atom) label in the Model column shows which CPU is meant for models with multiple Linux instances.
Note that this list is merged from Firmware-Probes of all known AVM firmware for a model, including Recovery.exe and Labor-Files.

Model Firmware Path Size
FRITZ!Box Fon WLAN 3.93 /bin 9.8k
FRITZ!Box Fon WLAN 7050 4.07 /bin 9.8k
2 models use this command


Daily updated index of all symbols of this command. Last update: 2022-11-26 07:14 GMT.

Firmware Symbol
3.93 - 4.07 ReadCodecLicence
3.93 - 4.07 Usage
3.93 - 4.07 WriteCodecLicence
3.93 - 4.07 main
4 symbols for this command


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