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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 28 Oct 2019 12:10:48 -0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9SCAkZb50135174 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 28 Oct 2019 12:10:46 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 522B5A4051; Mon, 28 Oct 2019 12:10:46 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DDF40A404D; Mon, 28 Oct 2019 12:10:43 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.151.87]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 28 Oct 2019 12:10:43 +0000 (GMT) Subject: Re: [PATCH v9 0/8] powerpc: Enabling IMA arch specific secure boot policies From: Mimi Zohar To: Nayna Jain , linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Ard Biesheuvel , Jeremy Kerr , Matthew Garret , Greg Kroah-Hartman , Claudio Carvalho , George Wilson , Elaine Palmer , Eric Ricther , "Oliver O'Halloran" , Prakhar Srivastava , Lakshmi Ramasubramanian Date: Mon, 28 Oct 2019 08:10:43 -0400 In-Reply-To: <20191024034717.70552-1-nayna@linux.ibm.com> References: <20191024034717.70552-1-nayna@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19102812-4275-0000-0000-000003786D27 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19102812-4276-0000-0000-0000388B9F9F Message-Id: <1572264643.4532.244.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-10-28_05:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=860 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910280124 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2019-10-23 at 22:47 -0500, Nayna Jain wrote: > This patchset extends the previous version[1] by adding support for > checking against a blacklist of binary hashes. > > The IMA subsystem supports custom, built-in, arch-specific policies to > define the files to be measured and appraised. These policies are honored > based on priority, where arch-specific policy is the highest and custom > is the lowest. > > PowerNV system uses a Linux-based bootloader to kexec the OS. The > bootloader kernel relies on IMA for signature verification of the OS > kernel before doing the kexec. This patchset adds support for powerpc > arch-specific IMA policies that are conditionally defined based on a > system's secure boot and trusted boot states. The OS secure boot and > trusted boot states are determined via device-tree properties. > > The verification needs to be performed only for binaries that are not > blacklisted. The kernel currently only checks against the blacklist of > keys. However, doing so results in blacklisting all the binaries that > are signed by the same key. In order to prevent just one particular > binary from being loaded, it must be checked against a blacklist of > binary hashes. This patchset also adds support to IMA for checking > against a hash blacklist for files. signed by appended signature. > > [1] http://patchwork.ozlabs.org/cover/1149262/ Thanks, Nayna. Please feel free to add my Signed-off-by tag on patches (2, 4, 5, 7 & 8). thanks, Mimi