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Wed, 8 Feb 2023 21:02:13 +0000 (GMT) Message-ID: Subject: Re: [PATCH v4 4/6] KEYS: X.509: Parse Key Usage From: Mimi Zohar To: Eric Snowberg , jarkko@kernel.org, dhowells@redhat.com, dwmw2@infradead.org Cc: herbert@gondor.apana.org.au, davem@davemloft.net, dmitry.kasatkin@gmail.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, pvorel@suse.cz, tadeusz.struk@intel.com, kanth.ghatraju@oracle.com, konrad.wilk@oracle.com, erpalmer@linux.vnet.ibm.com, coxu@redhat.com, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Date: Wed, 08 Feb 2023 16:02:12 -0500 In-Reply-To: <20230207025958.974056-5-eric.snowberg@oracle.com> References: <20230207025958.974056-1-eric.snowberg@oracle.com> <20230207025958.974056-5-eric.snowberg@oracle.com> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.28.5 (3.28.5-18.el8) X-TM-AS-GCONF: 00 X-Proofpoint-GUID: -NRkau411-dqyK-BRLgzcx0sxM9431rl X-Proofpoint-ORIG-GUID: O2imsdfnjt1YK5PJ1v-IVI6ACXy68YxX Content-Transfer-Encoding: 7bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-02-08_09,2023-02-08_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 impostorscore=0 mlxscore=0 phishscore=0 priorityscore=1501 adultscore=0 clxscore=1015 mlxlogscore=999 malwarescore=0 lowpriorityscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302080178 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org On Mon, 2023-02-06 at 21:59 -0500, Eric Snowberg wrote: > Parse the X.509 Key Usage. The key usage extension defines the purpose of > the key contained in the certificate. > > id-ce-keyUsage OBJECT IDENTIFIER ::= { id-ce 15 } > > KeyUsage ::= BIT STRING { > digitalSignature (0), > contentCommitment (1), > keyEncipherment (2), > dataEncipherment (3), > keyAgreement (4), > keyCertSign (5), > cRLSign (6), > encipherOnly (7), > decipherOnly (8) } > > If the keyCertSign or digitalSignature is set, store it in the > public_key structure. This will be used in a follow on patch that > requires knowing the certificate key usage type. > > Link: https://www.rfc-editor.org/rfc/rfc5280#section-4.2.1.3 > Signed-off-by: Eric Snowberg Reviewed-by: Mimi Zohar