From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758216AbaCTMhj (ORCPT ); Thu, 20 Mar 2014 08:37:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:1849 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754990AbaCTMhf (ORCPT ); Thu, 20 Mar 2014 08:37:35 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 03/12] KEYS: Allow expiry time to be set when preparsing a key From: David Howells To: keyrings@linux-nfs.org Cc: dhowells@redhat.com, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Date: Thu, 20 Mar 2014 12:04:58 +0000 Message-ID: <20140320120458.21635.23935.stgit@warthog.procyon.org.uk> In-Reply-To: <20140320120428.21635.13071.stgit@warthog.procyon.org.uk> References: <20140320120428.21635.13071.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.17-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow a key type's preparsing routine to set the expiry time for a key. Signed-off-by: David Howells --- Documentation/security/keys.txt | 10 +++++++--- include/linux/key-type.h | 1 + security/keys/key.c | 8 ++++++++ 3 files changed, 16 insertions(+), 3 deletions(-) diff --git a/Documentation/security/keys.txt b/Documentation/security/keys.txt index a4c33f1a7c6d..315cf96a41a2 100644 --- a/Documentation/security/keys.txt +++ b/Documentation/security/keys.txt @@ -1150,20 +1150,24 @@ The structure has a number of fields, some of which are mandatory: const void *data; size_t datalen; size_t quotalen; + time_t expiry; }; Before calling the method, the caller will fill in data and datalen with the payload blob parameters; quotalen will be filled in with the default - quota size from the key type and the rest will be cleared. + quota size from the key type; expiry will be set to TIME_T_MAX and the + rest will be cleared. If a description can be proposed from the payload contents, that should be attached as a string to the description field. This will be used for the key description if the caller of add_key() passes NULL or "". The method can attach anything it likes to type_data[] and payload. These - are merely passed along to the instantiate() or update() operations. + are merely passed along to the instantiate() or update() operations. If + set, the expiry time will be applied to the key if it is instantiated from + this data. - The method should return 0 if success ful or a negative error code + The method should return 0 if successful or a negative error code otherwise. diff --git a/include/linux/key-type.h b/include/linux/key-type.h index d2b4845d74bf..44792ee649de 100644 --- a/include/linux/key-type.h +++ b/include/linux/key-type.h @@ -45,6 +45,7 @@ struct key_preparsed_payload { const void *data; /* Raw data */ size_t datalen; /* Raw datalen */ size_t quotalen; /* Quota length for proposed payload */ + time_t expiry; /* Expiry time of key */ bool trusted; /* True if key is trusted */ }; diff --git a/security/keys/key.c b/security/keys/key.c index 686b10e81054..6a37856d428d 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -437,6 +437,11 @@ static int __key_instantiate_and_link(struct key *key, /* disable the authorisation key */ if (authkey) key_revoke(authkey); + + if (prep->expiry != TIME_T_MAX) { + key->expiry = prep->expiry; + key_schedule_gc(prep->expiry + key_gc_delay); + } } } @@ -479,6 +484,7 @@ int key_instantiate_and_link(struct key *key, prep.data = data; prep.datalen = datalen; prep.quotalen = key->type->def_datalen; + prep.expiry = TIME_T_MAX; if (key->type->preparse) { ret = key->type->preparse(&prep); if (ret < 0) @@ -811,6 +817,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, prep.datalen = plen; prep.quotalen = index_key.type->def_datalen; prep.trusted = flags & KEY_ALLOC_TRUSTED; + prep.expiry = TIME_T_MAX; if (index_key.type->preparse) { ret = index_key.type->preparse(&prep); if (ret < 0) { @@ -941,6 +948,7 @@ int key_update(key_ref_t key_ref, const void *payload, size_t plen) prep.data = payload; prep.datalen = plen; prep.quotalen = key->type->def_datalen; + prep.expiry = TIME_T_MAX; if (key->type->preparse) { ret = key->type->preparse(&prep); if (ret < 0)