Bug #1794: support random IV for GEA (via XID) - OsmoSGSN - Open Source Mobile Communications

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Bug #1794

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support random IV for GEA (via XID)

Added by msuraev over 7 years ago. Updated about 6 years ago.

Status:

Stalled

Priority:

Normal

Assignee:

Category:

Target version:

Start date:

08/09/2016

Due date:

% Done:

10%

Spec Reference:

Description

Current implementation of GPRS encryption uses hardcoded IV = 0 while according to spec it should be random. This random value is communicated to client as part of XID negotiation.

Related issues

Related to libosmocore - Feature #1910: add v4 encryption support

Resolved

01/11/2017

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Related to OsmocomBB - Feature #1672: add gprs decoding utility

Closed

03/24/2016

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Related to OsmoGGSN (former OpenGGSN) - Bug #2843: crash by icmpv6 message

Resolved

pespin

01/19/2018

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Blocked by OsmoSGSN - Feature #1580: IP header compression

Closed

dexter

02/23/2016

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Blocks OsmoSGSN - Bug #1582: GEA Encryption is missing

Resolved

laforge

02/23/2016

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Issue # Delay: days Cancel

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Updated by msuraev over 7 years ago

Blocked by Feature #1580: IP header compression added

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Updated by msuraev over 7 years ago

Blocks Bug #1582: GEA Encryption is missing added

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Updated by laforge over 7 years ago

The LLC XID related patch was just merged, so this should be possible to
implement now.
--
- Harald Welte <laforge@gnumonks.org> http://laforge.gnumonks.org/ ============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)

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Updated by laforge over 7 years ago

Assignee set to msuraev

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Updated by laforge over 7 years ago

Priority changed from Low to High

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Updated by msuraev over 7 years ago

Status changed from New to In Progress
% Done changed from 0 to 10

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Updated by msuraev over 7 years ago

Status changed from In Progress to Stalled

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Updated by laforge over 7 years ago

Priority changed from High to Normal

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Updated by laforge almost 7 years ago

ping?

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#10

Updated by laforge over 6 years ago

another ping, 5 months later. This is not acceptable.

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#11

Updated by msuraev over 6 years ago

Sorry, completely slipped of my mind - I was sure I've updated it. There's incomplete implementation in gerrit 1462 which is not working unfortunately: we send IV to the phone, we got encrypted traffic back but we fail to decrypt it (using IV we've sent or IV=0). Which means that the phone interprets it somehow differently. To debug this we've got to somehow get phone's baseband logs. Unfortunately xgoldmon and osmocom-bb do not support gprs yet. Not sure if there's better way to see what goes wrong.

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#12