baseband-devel April 2022

baseband-devel@lists.osmocom.org

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Engagetted !
by Sébastien Lorquet 14 Oct '25

14 Oct '25

http://www.engadget.com/2010/12/29/researchers-eavesdrop-on-encrypted-gsm-c… Congrats!

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Re: New attack ?
by Mychaela Falconia 06 Jun '23

06 Jun '23

Bastien Baranoff wrote: > Hello all, the attack : you generate the rainbow tables for each possibles ki > with a given rand set, send this rand (which is not random ;) the phone > respond with sres you make the operation for 3 or 4 rand and meaningly > decrease the possibility of ki. Do you think it is realisable ? Someone please correct me if I'm wrong on this detail, but it is my understanding that no mainstream commercial operator today (outside of personal enthusiast tinkerers in Osmocom and similar communities) issues native 2G SIM cards any more - instead all of their current SIM cards are actually USIM/ISIM, and if GSM 11.11 SIM operation is supported at all, it is only provided as a backward compatibility mode. I reason that these "modern" SIMs must be using Milenage in their native 3G/4G mode, thus their secret key material is not classic Ki, but K/Ki (128 bits) plus OPc (another 128 bits), for a total of 256 bits of secret key material. What happens when these "modern" SIMs are accessed via GSM 11.11 SIM protocol, or when 2G authentication is requested in a USIM session? I find it doubtful that they switch to COMP128 (any version) in this mode, instead I reason that they use 2G mode of Milenage, which still uses both K/Ki and OPc - thus the secret key material used even for 2G Kc and SRES generation from RAND is still 256 bits rather than 128. Again, someone please correct me if my reasoning is wrong here. M~

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mobile app is not working properly
by msfu 08 Apr '22

08 Apr '22

Hello, im trying to open the mobile application but it tells me that it failed to parse the configuration file. ~/osmocom/osmocom-bb/src/host/layer23/src/mobile# sudo ./mobile Copyright (C) 2010-2015 Andreas Eversberg, Sylvain Munaut, Holger Freyther, Harald Welte Contributions by Alex Badea, Pablo Neira, Steve Markgraf and others License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. <0011> app_mobile.c:451 Failed to parse the configuration file '/root/.osmocom/bb/mobile.cfg' <0011> app_mobile.c:454 Please make sure the file '/root/.osmocom/bb/mobile.cfg' exists, or use an example from 'doc/examples/mobile/' i was searching for the directory /root/.osmocom/bb/ to build the missing file but i cannot find it. Am i blind or where is this folder? it is not in my Home or root directory. Thanks for your help best regards msfu

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osmocombb error opening file: No such file or directory
by msfu 08 Apr '22

08 Apr '22

Hi there, after a fresh new install i tried to open layer1 in osmocombb but the tool gave me this error: ~/osmocom/osmocom-bb/src/host/osmocon# sudo ./osmocon -m c123xor -p /dev/ttyUSB1 -c root/osmocom/osmocom-bb/src/target/firmware/board/compal_e88/layer1.compalram.bin got 2 bytes from modem, data looks like: 04 81 .. got 5 bytes from modem, data looks like: 1b f6 02 00 41 ....A got 1 bytes from modem, data looks like: 01 . got 1 bytes from modem, data looks like: 40 @ Received PROMPT1 from phone, responding with CMD read_file(chainloader): file_size=32, hdr_len=4, dnload_len=39 got 1 bytes from modem, data looks like: 1b . got 1 bytes from modem, data looks like: f6 . got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 41 A got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 43 C Received PROMPT2 from phone, starting download handle_write(): 39 bytes (39/39) handle_write(): finished got 1 bytes from modem, data looks like: 1b . got 1 bytes from modem, data looks like: f6 . got 1 bytes from modem, data looks like: 02 . got 1 bytes from modem, data looks like: 00 . got 1 bytes from modem, data looks like: 41 A got 1 bytes from modem, data looks like: 03 . got 1 bytes from modem, data looks like: 42 B Received DOWNLOAD ACK from phone, your code is running now! Enabled Compal ramloader -> Calypso romloader chainloading mode Received ident ack from phone, sending parameter sequence opening file: No such file or directory i dont think its broken, but maybe its a spelling error or something? I hope you can help me. I'm just irritated. Have a nice day msfu

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baseband-devel April 2022