tree e1cdc953d81f38a49a18edfc54fb34b1ca1d051f
parent c555e18ebb8829ff216452c6803fd7c1718c6845
author Ben Fox-Moore <ben.foxmoore@accelleran.com> 1537796822 +0200
committer Philipp Maier <pmaier@sysmocom.de> 1537978459 +0200

utils: fix encoding/decoding of IMSI value

When programming or reading a SIM with an IMSI shorter than 15, the IMSI
value is incorrectly encoded/decoded.

The code pads the the IMSI value with 0xF from the left but padding from
the right would be correct.

It also encodes the length as half the number of digits in the IMSI
(rounded up). This isn't correct for even length IMSIs. With even length
IMSIs, the odd/even parity bit bumps the last digit into an extra byte,
which should be counted as well.

- Fix endcoding of IMSI value
- Fix decoding of IMSI value

Change-Id: I9ae4ca4eb7c2965e601a7108843d052ff613beb9
Patch-by: Ben Foxmoore
Closes: SYS#3552