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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 15 Jan 2020 18:36:09 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00FIa88u47972486 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Jan 2020 18:36:08 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8E6854C046; Wed, 15 Jan 2020 18:36:08 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 84B074C04E; Wed, 15 Jan 2020 18:36:07 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.153.48]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 15 Jan 2020 18:36:07 +0000 (GMT) Subject: Re: [PATCH v2] ima: add the ability to query the hash of a given file. From: Mimi Zohar To: KP Singh , Florent Revest Cc: linux-integrity@vger.kernel.org, mjg59@google.com, nramas@linux.microsoft.com, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, Florent Revest Date: Wed, 15 Jan 2020 13:36:07 -0500 In-Reply-To: <20200113104830.GA28588@google.com> References: <20200106162524.164650-1-revest@chromium.org> <20200113104830.GA28588@google.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: 20011518-0008-0000-0000-00000349AB4B X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20011518-0009-0000-0000-00004A6A0255 Message-Id: <1579113367.5032.19.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-15_02:2020-01-15,2020-01-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 mlxscore=0 mlxlogscore=951 impostorscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 bulkscore=0 spamscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001150141 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org On Mon, 2020-01-13 at 11:48 +0100, KP Singh wrote: > On 06-Jan 17:25, Florent Revest wrote: > > From: Florent Revest > > > > This allows other parts of the kernel (perhaps a stacked LSM allowing > > system monitoring, eg. the proposed KRSI LSM [1]) to retrieve the hash > > of a given file from IMA if it's present in the iint cache. > > > > It's true that the existence of the hash means that it's also in the > > audit logs or in /sys/kernel/security/ima/ascii_runtime_measurements, > > but it can be difficult to pull that information out for every > > subsequent exec. This is especially true if a given host has been up > > for a long time and the file was first measured a long time ago. > > > > This is based on Peter Moody's patch: > > https://sourceforge.net/p/linux-ima/mailman/message/33036180/ > > > > [1] https://lkml.org/lkml/2019/9/10/393 > > > > Signed-off-by: Florent Revest > > Thanks for adding this Florent! > > Reviewed-by: KP Singh Thanks, this patch is now queued in next-integrity-testing. Mimi