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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 11 Oct 2019 14:18:22 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9BDIK0T35848280 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 11 Oct 2019 13:18:20 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B4B0711C06E; Fri, 11 Oct 2019 13:18:20 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7EEF711C05B; Fri, 11 Oct 2019 13:18:18 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.178.57]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 11 Oct 2019 13:18:18 +0000 (GMT) Subject: Re: [PATCH v7 6/8] certs: add wrapper function to check blacklisted binary hash From: Mimi Zohar To: Nayna Jain , linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Ard Biesheuvel , Jeremy Kerr , Matthew Garret , Greg Kroah-Hartman , Claudio Carvalho , George Wilson , Elaine Palmer , Eric Ricther , "Oliver O'Halloran" Date: Fri, 11 Oct 2019 09:18:17 -0400 In-Reply-To: <1570497267-13672-7-git-send-email-nayna@linux.ibm.com> References: <1570497267-13672-1-git-send-email-nayna@linux.ibm.com> <1570497267-13672-7-git-send-email-nayna@linux.ibm.com> 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: 19101113-0028-0000-0000-000003A92DAB X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19101113-0029-0000-0000-0000246B3A28 Message-Id: <1570799897.5250.79.camel@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-10-11_08:,, 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=8.0.1-1908290000 definitions=main-1910110124 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2019-10-07 at 21:14 -0400, Nayna Jain wrote: > The existing is_hash_blacklisted() function returns -EKEYREJECTED > error code for both the blacklisted keys and binaries. > > This patch adds a wrapper function is_binary_blacklisted() to check > against binary hashes and returns -EPERM.     > > Signed-off-by: Nayna Jain This patch description describes what you're doing, not the motivation. Reviewed-by: Mimi Zohar > --- > certs/blacklist.c | 9 +++++++++ > include/keys/system_keyring.h | 6 ++++++ > 2 files changed, 15 insertions(+) > > diff --git a/certs/blacklist.c b/certs/blacklist.c > index ec00bf337eb6..6514f9ebc943 100644 > --- a/certs/blacklist.c > +++ b/certs/blacklist.c > @@ -135,6 +135,15 @@ int is_hash_blacklisted(const u8 *hash, size_t hash_len, const char *type) > } > EXPORT_SYMBOL_GPL(is_hash_blacklisted); > > +int is_binary_blacklisted(const u8 *hash, size_t hash_len) > +{ > + if (is_hash_blacklisted(hash, hash_len, "bin") == -EKEYREJECTED) > + return -EPERM; > + > + return 0; > +} > +EXPORT_SYMBOL_GPL(is_binary_blacklisted); > + > /* > * Initialise the blacklist > */ > diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h > index c1a96fdf598b..fb8b07daa9d1 100644 > --- a/include/keys/system_keyring.h > +++ b/include/keys/system_keyring.h > @@ -35,12 +35,18 @@ extern int restrict_link_by_builtin_and_secondary_trusted( > extern int mark_hash_blacklisted(const char *hash); > extern int is_hash_blacklisted(const u8 *hash, size_t hash_len, > const char *type); > +extern int is_binary_blacklisted(const u8 *hash, size_t hash_len); > #else > static inline int is_hash_blacklisted(const u8 *hash, size_t hash_len, > const char *type) > { > return 0; > } > + > +static inline int is_binary_blacklisted(const u8 *hash, size_t hash_len) > +{ > + return 0; > +} > #endif > > #ifdef CONFIG_IMA_BLACKLIST_KEYRING