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Mon, 6 Apr 2026 00:08:16 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org Cc: zohar@linux.ibm.com, roberto.sassu@huawei.com, ebiggers@kernel.org, coxu@redhat.com, Stefan Berger Subject: [ima-evm-utils PATCH 0/5] Add support for ML-DSA signing and verification Date: Sun, 5 Apr 2026 20:08:05 -0400 Message-ID: <20260406000810.4013201-1-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=J6anLQnS c=1 sm=1 tr=0 ts=69d2f973 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=BLDyFmNgsX99shYY7EQA:9 X-Proofpoint-GUID: IaTAzSaU5jGoxYAWGgyu9bvJFcLbzfE- X-Proofpoint-ORIG-GUID: IaTAzSaU5jGoxYAWGgyu9bvJFcLbzfE- X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA1MDI0NyBTYWx0ZWRfX2wWb1AF0iSVp K1isUw2RdCL/x26Tf3+etS1EAin4a7dxd+JFxWy5B/JY2iwoxvg2K6KM+pIimze4rNfOdIjfKSn 14Fhzpdc19RChpp+PeiqyMA8niiYB3fHJc12BvwavJhr9ncpI6WWF/slQr7UGfaDSwZIxsUuvBk 0P6vQLeIFma0ctZ1e0iKgUJpgcu4tJ9jKnnELM+9FzwYQHzdnIufnbhFyrdH1W65Fa++Beo3N7I MyhbvnlqTn0XX/WMMvyzojpkyH8EFd/fhC7kJtCaAulk7M3Q45RQ9WVpGxko9PxAx2pyB+Kd8z4 X1ZBFAXXMSPKY60zJovXFRJzakJDutHoLujzXZEFSoZyjEZdJ9EdqvD0xssDgMd9zVJEO/83+HU uVyJhUr2S/eSppji0a1k6wwhJ4S0OHFuwGZ9O8iM039lURaAWgBGlzJxeMq6oRSoIocbAvNpSyD 7DTmkPY778NjfPuHcQw== 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=2026-04-05_08,2026-04-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 impostorscore=0 phishscore=0 malwarescore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604050247 This series adds support for ML-DSA signing and verification for EVM and IMA using ML-DSA in pure mode and IMA's sigv3 signature format. Evmctl will prevent users from trying to use sigv2 signatures with ML-DSA and therefore ML-DSA requires the usage of --v3. Test cases for IMA and EVM sigv3 are added using ML-DSA-44 (2420 bytes) and ML-DSA-65 (3309 bytes) type of keys since those are more likely to fit into xattrs on most filesystems than the even larger ML-DSA-87 signatures (4627 bytes). Stefan Stefan Berger (5): checkpatch: Remove warning when function name is found in output string Set size of xattr_value to MAX_SIGNATURE_SIZE Support signing with ML-DSA keys when OpenSSL >=3.5 is available examples: Implement script to create ML-DSA-65 CA and signing keys test: Add tests for signing and verifying with ML-DSA keys README | 3 +- examples/ima-gen-local-ca-mldsa65.sh | 29 +++ examples/ima-genkey-mldsa65.sh | 34 ++++ examples/ima-genkey-mldsa87.sh | 34 ++++ scripts/checkpatch.pl | 14 +- src/evmctl.c | 6 +- src/imaevm.h | 5 +- src/libimaevm.c | 258 +++++++++++++++++++++++++-- tests/gen-keys.sh | 22 +++ tests/sign_verify.test | 40 ++++- 10 files changed, 417 insertions(+), 28 deletions(-) create mode 100755 examples/ima-gen-local-ca-mldsa65.sh create mode 100755 examples/ima-genkey-mldsa65.sh create mode 100755 examples/ima-genkey-mldsa87.sh -- 2.53.0