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Subject: Re: Selinux policy for x509_ima.der public certificate loaded by
 kernel during boot
To:     rishi gupta <gupt21@gmail.com>,
        linux-integrity <linux-integrity@vger.kernel.org>,
        selinux-refpolicy@vger.kernel.org, selinux@vger.kernel.org
References: <CALUj-gt8KD4Cc-zgvXP-8vNdR3RB_Sdx7yd2cv7GX_wBCM6gEQ@mail.gmail.com>
From:   Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
Message-ID: <28afd683-8423-0331-4b7d-ec71d46be30c@rosalinux.ru>
Date:   Fri, 6 Nov 2020 18:12:56 +0300
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06.11.2020 15:22, rishi gupta =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
> I am getting below error as selinux is denying access to the .ima
> keyring. Looking for guidance for asymmetric public key selinux
> policy.
>
> [  172.014855] integrity: Request for unknown key 'id:87deb3bf' err -13
I am getting the same error without selinux.
>
> [  172.015035] audit: type=3D1800 audit(1604596570.579:240): pid=3D825
> uid=3D1021 auid=3D4294967295 ses=3D4294967295
> subj=3Dsystem_u:system_r:mydaemon_t:s0-s15:c0.c1023 op=3D"appraise_data=
"
> cause=3D"invalid-signature" comm=3D"mydaemon"
> name=3D"/usr/lib/libstdc++.so.6.0.25" dev=3D"ubifs" ino=3D14353 res=3D0
Selinux context is just logged here. It has nothing to do with reasons of=
 ivalid signature. Public key seems to be not loaded.
>
> (a) Do I need to set the selinux context of file
> /etc/keys/x509_ima.der. If yes what it should be.
> (b) Do I need to set some selinux rule for .ima keyring. If yes how. I
> tried a lot but could not find any resource.
Usually IMA policy is loaded before SELinux policy I think
>
> Regards,
> Rishi