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From: Mimi Zohar To: David Howells Cc: James Bottomley , Udit Agarwal , zohar@linux.vnet.ibm.com, jmorris@namei.org, serge@hallyn.com, denkenz@gmail.com, linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, sahil.malhotra@nxp.com, ruchika.gupta@nxp.com, horia.geanta@nxp.com, aymen.sghaier@nxp.com Date: Fri, 03 Aug 2018 11:23:35 -0400 In-Reply-To: <25968.1533308142@warthog.procyon.org.uk> References: <1533307535.4337.415.camel@linux.ibm.com> <20180723111432.26830-1-udit.agarwal@nxp.com> <8060.1533226481@warthog.procyon.org.uk> <1533297482.4337.373.camel@linux.ibm.com> <1533306238.4140.1.camel@HansenPartnership.com> <25968.1533308142@warthog.procyon.org.uk> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.20.5 (3.20.5-1.fc24) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 18080315-0008-0000-0000-0000025C724E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080315-0009-0000-0000-000021C31789 Message-Id: <1533309815.4337.437.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-03_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808030169 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2018-08-03 at 15:55 +0100, David Howells wrote: > Mimi Zohar wrote: > > > "trusted" keys are currently being used to decrypt other keys (eg. > > encrypted, ecryptfs, ...). > > Can it decrypt both symmetric and asymmetric keys? Yes, the "trusted" key is returned to the caller and is used to decrypt a datablob. For an example, refer to encrypted_key_decrypt().  The call to request_master_key() returns either the "trusted" or "user" type key, which is used to decrypt the "enccrypted" key type. Mimi