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Fri, 4 Jul 2025 08:43:16 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD6072004B; Fri, 4 Jul 2025 08:43:16 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9846120040; Fri, 4 Jul 2025 08:43:11 +0000 (GMT) Received: from [9.61.253.3] (unknown [9.61.253.3]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Fri, 4 Jul 2025 08:43:11 +0000 (GMT) Message-ID: <6dfdc950-fe2c-4311-b53a-9c1439783d3a@linux.ibm.com> Date: Fri, 4 Jul 2025 14:13:08 +0530 Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 3/3] integrity/platform_certs: Allow loading of keys in the static key management mode To: Srish Srinivasan , linux-integrity@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, naveen@kernel.org, ajd@linux.ibm.com, zohar@linux.ibm.com, nayna@linux.ibm.com, msuchanek@suse.de, linux-kernel@vger.kernel.org References: <20250610211907.101384-1-ssrish@linux.ibm.com> <20250610211907.101384-4-ssrish@linux.ibm.com> Content-Language: en-US From: R Nageswara Sastry In-Reply-To: <20250610211907.101384-4-ssrish@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=E/PNpbdl c=1 sm=1 tr=0 ts=6867942a cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=VnNF1IyMAAAA:8 a=NvCG-ebki-3VrmPakVEA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: hBUyKwWUPpP25JebkuKlcVWl5zZacEw0 X-Proofpoint-ORIG-GUID: S4zUZkPr5byYyvq0hyiqAQzRlh0-nxqU X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzA0MDA2NCBTYWx0ZWRfX4ok3QQ4bhhAd MRLiLEXSplfAsCtn7pSzDdqJc6ge6NrJQxSmFA5UQ5Qw0kNdMF+EhKGSLQtAgJkb86zJyBefUTu AAdOxK9L7uy+NoE0DXFz1rzENm7qInTL/lc+51rEwQ/xXUC/h2p5nH7nwPItHeq33G/lpfGfdgi h7O2zRUg92nTADbshhgFaacxc57yFqOl4dSl7KQgyQFQqr5Zw+pRLXN5LKNqUwx6+wzh9Vlezza 7nZ/Y8efy1TlhWDyGOuq7gpdYJogi7gOk4ZzpbSkhzVACzDKGU+1Gzq+j03z33sN/oSp6gp/Q+H pugFSJ34I8HZm4biagAUBAnZ0NKYhM++39g14LOC2KiXsjCpC2C1cGdVNlJV85Yj9dsPXsuDyOu +f3ySv7CAv031Us1tw/IiYnfYlwEuynOQoQu+qx5bmq21SlO8Q6uSOnL5WXhkjGJjT19R5RS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-04_03,2025-07-02_04,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 bulkscore=0 priorityscore=1501 phishscore=0 suspectscore=0 mlxlogscore=999 lowpriorityscore=0 mlxscore=0 clxscore=1015 adultscore=0 impostorscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507040064 On 11/06/25 2:49 AM, Srish Srinivasan wrote: > On PLPKS enabled PowerVM LPAR, there is no provision to load signed > third-party kernel modules when the key management mode is static. This > is because keys from secure boot secvars are only loaded when the key > management mode is dynamic. > > Allow loading of the trustedcadb and moduledb keys even in the static > key management mode, where the secvar format string takes the form > "ibm,plpks-sb-v0". > > Signed-off-by: Srish Srinivasan > Reviewed-by: Mimi Zohar > Reviewed-by: Stefan Berger > Reviewed-by: Nayna Jain > Reviewed-by: Andrew Donnellan Tested-by: R Nageswara Sastry With the following scenarios: 1. With and with out secure boot by enabling keystore_signed_updates and keystore_kbytes 2. With Dynamic Key Guest Secure Boot 3. With Static Key Guest Secure Boot > --- > security/integrity/platform_certs/load_powerpc.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/security/integrity/platform_certs/load_powerpc.c b/security/integrity/platform_certs/load_powerpc.c > index c85febca3343..714c961a00f5 100644 > --- a/security/integrity/platform_certs/load_powerpc.c > +++ b/security/integrity/platform_certs/load_powerpc.c > @@ -75,12 +75,13 @@ static int __init load_powerpc_certs(void) > return -ENODEV; > > // Check for known secure boot implementations from OPAL or PLPKS > - if (strcmp("ibm,edk2-compat-v1", buf) && strcmp("ibm,plpks-sb-v1", buf)) { > + if (strcmp("ibm,edk2-compat-v1", buf) && strcmp("ibm,plpks-sb-v1", buf) && > + strcmp("ibm,plpks-sb-v0", buf)) { > pr_err("Unsupported secvar implementation \"%s\", not loading certs\n", buf); > return -ENODEV; > } > > - if (strcmp("ibm,plpks-sb-v1", buf) == 0) > + if (strcmp("ibm,plpks-sb-v1", buf) == 0 || strcmp("ibm,plpks-sb-v0", buf) == 0) > /* PLPKS authenticated variables ESL data is prefixed with 8 bytes of timestamp */ > offset = 8; > -- Thanks and Regards R.Nageswara Sastry