Re: libaudit: android support

Hi, I don't know if you forget to add the list as CC so i answer you directly and send it to the list if you are okay.

On 14/10/2025 19:52, William Roberts wrote: > On Tue, Oct 14, 2025 at 12:09 PM Jean-Jacques Pitrolle > <jean-jacques.pitrolle(a)sysgo.com&gt; wrote: >> >> Hi Bill >> >> On 14/10/2025 18:54, William Roberts wrote: >>> I did a rewrite of libaudit for Android and it was merged into logd. >>> It's been a long time since I have looked at it, >>> but AFAIK, the logs should be available via logcat. None of this will >>> be part of the ndk if you want to build against it, >>> it's really a system only level thing. >>> >>> Here is where that libaudit code lives now: >>> https://cs.android.com/android/platform/superproject/main/+/main:system/ >>> logging/logd/libaudit/libaudit.cpp >> >> Thanks for your quick answer. >> >> Okay at least something exists for libaudit. I need to take a look on it >> to see how i can use it. > > Ultimately you need permissions to the netlink socket that the audit > subsystem uses, > and that is not available to typical android applications, you would > need to build your > own custom Android that exposes that. However, that would violate the > required CTS > for Android branding IIRC. I think at the end it is a *problem* to build my own Android to access the netlink socket. My purpose is to stick as much as possible to a vanilla Android: so avoid as much as possible specific modification.

> >> >> And what about libauparse? > > I don't believe that is there. > >> Should i consider to build it myself with Android build environment? > > You can grab and build anything, code is code, but the biggest part of > the way Android containers > work is, "Will I have permissions to get at the resource". If you just > want to look at the messages, > it's in logcat, and you can build an application that has the > permission READ_LOGS IIRC, in the > Android Manifest to look at logcat and then look for selinux/audit messages. Hmm i'm not very familiar with Android execution environment. I want to create a C/C++ application (not Kotlin/Java..) an i don't know if a manifest is required. I need to do my 'Android architecture' homework before to have a clear understanding of the pre-requisite for my use case.

> > More about your ultimate goal would help me understand and formulate a > better response if you > can share that? My ultimate goal is to read audit/log events from various daemons like auditd, syslogd, .. and transform those events to a format closed to Qualified Security Event defined by AUTOSAR[1]. On a GNU/Linux distribution the services are "well" defined and known (at least by myself ^^) On an Android it seems that *everything* is logged by logd/logcat.

Thanks. Regards [1]: https://www.autosar.org/fileadmin/standards/R22-11/FO/AUTOSAR_PRS_Intrusi... >> >> Regards.