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Wed, 25 Mar 2026 21:07:22 +0000 (GMT) Message-ID: Subject: Re: [PATCH] integrity: Allow sigv3 verification on EVM_XATTR_PORTABLE_DIGSIG From: Mimi Zohar To: Stefan Berger , linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, ebiggers@kernel.org, roberto.sassu@huawei.com In-Reply-To: <6849d94f-6295-486d-aec2-0f2942539b33@linux.ibm.com> References: <20260325001051.754093-1-stefanb@linux.ibm.com> <3f9e7aa4e22ebaf38735a74b1912cf4601535791.camel@linux.ibm.com> <6849d94f-6295-486d-aec2-0f2942539b33@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Date: Wed, 25 Mar 2026 17:07:22 -0400 Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Evolution 3.56.2 (3.56.2-2.fc42) X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 0LUIyjZlfpjkbn7pnxjStRdsX0PUh5wF X-Authority-Analysis: v=2.4 cv=aMr9aL9m c=1 sm=1 tr=0 ts=69c44e8c cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=nnOYOSgYopN8RwZPrccA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDE0OSBTYWx0ZWRfXy5StQwNcvUEi 1fkfZjarlfJTU5Kwoexlb4z7oVMt2F/VOAGGwOIOCsdukNM159k1+KWEAbA54+uwEpcZW8Ua+nN TFADPEpRCbLbuRcwC6NVayWOcLiVpCu4nCOWg5s5m1SHMNA5jdYXs+MytAVhCsBuurGBdHJlIE6 KS2yL/WxUqwo/YaXwYBVkoF/UlUKKsj7EvqBSkIElBnMgiP8LmSnk4cYQKdl+ma02luC7IgyMm7 ABFHg5wfQzUfKtWco5VCemuIN+DeYn/CnchAXGIZWt5liZhr/gOV6d6jiNBkrZ94t9PhLJlE96s fzp/9ZIx4eZKRuKoL/btTnU/meHx3EomY65j2pgMzoVg0e9HK7wGGIZg4qGZGeRnVfT4wkLRfij KhlFN4PAclrsnsIMfSKrWKqws4btV3Edq/qaz3c+S0tCq48OpCYKYzlccFKjjv6EFINpWCf22Ay Ivgq1ST8wG0psRmQCAQ== X-Proofpoint-GUID: 0LUIyjZlfpjkbn7pnxjStRdsX0PUh5wF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-25_05,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 malwarescore=0 suspectscore=0 phishscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250149 On Wed, 2026-03-25 at 13:37 -0400, Stefan Berger wrote: >=20 > On 3/25/26 10:56 AM, Mimi Zohar wrote: > > On Tue, 2026-03-24 at 20:10 -0400, Stefan Berger wrote: > > > Allow sigv3 verification on EVM_XATTR_PORTABLE_DIGSIG on RSA, ECDSA, > > > ECRDSA, and SM2 signatures. > > >=20 > > > Signed-off-by: Stefan Berger > >=20 > > Thanks, Stefan. > >=20 > > IMA makes an exception allowing an EVM signature in lieu of an IMA sign= ature, > > when there is no IMA signature. If the IMA policy rule requires an IMA= sigv3 > > type signature, then EVM should also require a sigv3 type signature. > > > Currently any EVM signature type suffices. >=20 > Agreed, though it seems to be a problem that also exists with EVM=20 > non-portable signature, which should have a check. I cannot create them= =20 > easily in my environment, so I cannot test with them. >=20 > Passing the flags from IMA into EVM is easy. What is a bit more=20 > challenging is the evm_verify_current_integrity code path... I've queued this patch in next-integrity-testing with the other sigv3 patch= es, since enforcing EVM sigv3 should be upstreamed as separate patch. thanks, Mimi