From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A36E6292B44; Fri, 7 Nov 2025 19:19:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.158.5 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762543194; cv=none; b=FC5nCg4ErKz3eUfXaxbpFTHKIxQ+XMIt+sTFWLivO2GnPk6OOxS47wPphLtF2121TiJEgI98AZCT4bSJGHPd8Di0F7QahuemX7SOIQl4xRUNA7p0lqxR4ygIB+j3FdeiJ2latyeXa5z3t1o2MOPGbOwst/VrtuCYk0dG6Ddhp1I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762543194; c=relaxed/simple; bh=oLgM015OM6CB7TstOOmFItZLsdG8/LLCc/TNDBwFG6c=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=EOZevz1otXPsE66dGCPBEJ1+wvqC1aFzUm9zLywC2CvMEGhJjjDyRGYpIQ4CwIY9WVvvvzCZjCAlwtRMGc9P+0oCjMuJX/PFd+u435X5lEs3aaCKYjD8t/2izd4qvG+6u4djuRzC518mmk4T/HN/oNPWd1qa00qejom6frArhPI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=iwB9wdMk; arc=none smtp.client-ip=148.163.158.5 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="iwB9wdMk" Received: from pps.filterd (m0356516.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 5A7FMvtd018950; Fri, 7 Nov 2025 19:19:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=lYTk4Q KdhbLy2+aNu5zpAguuzePfls8unBeR/cJArbk=; b=iwB9wdMk9hTxVeHtkUr5ZA cLnZ41L2VPDblbPE/dD3cqNca9AUz2Re0air3MQOsWUzuDa9/pjsq+5HUYmF0+7N E/eOGXlxxlOAh6+PilbmGoN+Z6wYI060lyTi5r1+bD2svJoTrspDxwc1d+N5vMGH wToIEfFklRwF713ChKOD1WPQKos4uLBmd2pAMxDO689m3PeegbwoVW1JpNXhNUqD CCjvrta016nsHQaWRE1upj501r7iqkTv7Joz4kQZpCGwfF/0YJ+dhcDsxDIL4RPD YZPBv51lZcUIOCPJdfsDlpMw0o83dRk5MeSo6ooRfCC41cSqlKIVc+hZV0qZnJfQ == Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4a57mrngjs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Nov 2025 19:19:27 +0000 (GMT) Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 5A7GHfkX021463; Fri, 7 Nov 2025 19:19:25 GMT Received: from smtprelay03.wdc07v.mail.ibm.com ([172.16.1.70]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 4a5xrk49ns-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Nov 2025 19:19:25 +0000 Received: from smtpav02.dal12v.mail.ibm.com (smtpav02.dal12v.mail.ibm.com [10.241.53.101]) by smtprelay03.wdc07v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 5A7JJBaY18547454 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 7 Nov 2025 19:19:11 GMT Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D778858060; Fri, 7 Nov 2025 19:19:24 +0000 (GMT) Received: from smtpav02.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EDF0D5805F; Fri, 7 Nov 2025 19:19:23 +0000 (GMT) Received: from [9.47.158.152] (unknown [9.47.158.152]) by smtpav02.dal12v.mail.ibm.com (Postfix) with ESMTP; Fri, 7 Nov 2025 19:19:23 +0000 (GMT) Message-ID: <3bb08a53-0387-41a7-98bd-31054edf48cd@linux.ibm.com> Date: Fri, 7 Nov 2025 14:19:23 -0500 Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: Module signing and post-quantum crypto public key algorithms To: David Howells Cc: Simo Sorce , James Bottomley , Ignat Korchagin , Herbert Xu , Stephan Mueller , torvalds@linux-foundation.org, Paul Moore , Lukas Wunner , Clemens Lang , David Bohannon , Roberto Sassu , keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org References: <53e81761-47e1-400e-933d-0a53018c9cab@linux.ibm.com> <501216.1749826470@warthog.procyon.org.uk> <3081793dc1d846dccef07984520fc544f709ca84.camel@HansenPartnership.com> <7ad6d5f61d6cd602241966476252599800c6a304.camel@redhat.com> <69775877d04b8ee9f072adfd2c595187997e59fb.camel@HansenPartnership.com> <3d650cc9ff07462e5c55cc3d9c0da72a3f2c5df2.camel@redhat.com> <61528.1762509829@warthog.procyon.org.uk> Content-Language: en-US From: Stefan Berger In-Reply-To: <61528.1762509829@warthog.procyon.org.uk> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: LyNIrI7VH9IiLAXu7TEEMMMI12NyfKyF X-Authority-Analysis: v=2.4 cv=MKhtWcZl c=1 sm=1 tr=0 ts=690e463f cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=NEAV23lmAAAA:8 a=VnNF1IyMAAAA:8 a=UqG-1mT3ekDs38WSfRMA:9 a=QEXdDO2ut3YA:10 a=cPQSjfK2_nFv0Q5t_7PE:22 X-Proofpoint-ORIG-GUID: LyNIrI7VH9IiLAXu7TEEMMMI12NyfKyF X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTAxMDAwMSBTYWx0ZWRfX21XGpXMFmoYG MhxAhCgXJnE8FGuNgzAPbERaTsmc2jpgLhBmlVq7yszuf+xaw2RSQc57yCV6dompEOMLxjaeBbI Pln95yeGvq1FrTG/glkCWUS4WTLJNMtdvtFe3mkLlyF5x4Z1/5+zs51UYm8G76LCjlt3P80hA8c Alxn79cK285N2jIyVAbR/HQpf8Yh0FIZbuAubbL1DtgWe72kFUt640HcACuBBusaH+BvYxl11pU OEX6adxi+0QRPQrOINZQhVnQe+R4pZt3sDEH8gBUlV48IUsCySAuLsaACToLeaVHrJFiSTA0d7B Deu1qxobgxNhZymH6nq4AuIEIFQKA0BWBgDUECjzQHfZuBLWqQ/+HBKJzCBOB0mlGPP+PF49K47 8CqgdRueEFH9Nb42u/TH09EfMqn4fQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-07_05,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 bulkscore=0 impostorscore=0 clxscore=1011 lowpriorityscore=0 malwarescore=0 adultscore=0 phishscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2510240000 definitions=main-2511010001 On 11/7/25 5:03 AM, David Howells wrote: > Stefan Berger wrote: > >> On 6/16/25 1:27 PM, Simo Sorce wrote: >>> Of course we can decide to hedge *all bets* and move to a composed >>> signature (both a classic and a PQ one), in which case I would suggest >>> looking into signatures that use ML-DSA-87 + Ed448 or ML-DSA-87 + P-521 >>> ,ideally disjoint, with a kernel policy that can decide which (or both) >>> needs to be valid/checked so that the policy can be changed quickly via >>> configuration if any of the signature is broken. >> >> FYI: based on this implementation of ML-DSA-44/65/87 >> >> https://github.com/IBM/mlca/tree/main/qsc/crystals > > The problem with that is that the Apache-2 licence is incompatible with GPLv2. > Now, it might be possible to persuade IBM to dual-license their code. Correct. It was supposed to become GPLv2 + Apache 2. > > David > >