From: Jarkko Sakkinen <jarkko@kernel.org>
To: "Mickaël Salaün" <mic@digikod.net>
Cc: "David Howells" <dhowells@redhat.com>,
"David Woodhouse" <dwmw2@infradead.org>,
"David S . Miller" <davem@davemloft.net>,
"Herbert Xu" <herbert@gondor.apana.org.au>,
"James Morris" <jmorris@namei.org>,
"Mickaël Salaün" <mic@linux.microsoft.com>,
"Mimi Zohar" <zohar@linux.ibm.com>,
"Serge E . Hallyn" <serge@hallyn.com>,
keyrings@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-security-module@vger.kernel.org
Subject: Re: [PATCH v3 08/10] certs: Check that builtin blacklist hashes are valid
Date: Thu, 21 Jan 2021 17:21:58 +0200 [thread overview]
Message-ID: <YAmcFk9r8sUvT7U4@kernel.org> (raw)
In-Reply-To: <c644f660-8b65-586d-42d8-45601ca58ca3@digikod.net>
On Thu, Jan 21, 2021 at 10:18:20AM +0100, Mickaël Salaün wrote:
>
> On 21/01/2021 00:53, Jarkko Sakkinen wrote:
> > On Wed, Jan 20, 2021 at 12:57:55PM +0100, Mickaël Salaün wrote:
> >>
> >> On 20/01/2021 06:19, Jarkko Sakkinen wrote:
> >>> On Thu, Jan 14, 2021 at 04:19:07PM +0100, Mickaël Salaün wrote:
> >>>> From: Mickaël Salaün <mic@linux.microsoft.com>
> >>>>
> >>>> Add and use a check-blacklist-hashes.awk script to make sure that the
> >>>> builtin blacklist hashes will be approved by the run time blacklist
> >>>> description checks. This is useful to debug invalid hash formats, and
> >>>> it make sure that previous hashes which could have been loaded in the
> >>>> kernel (but ignored) are now noticed and deal with by the user.
> >>>>
> >>>> Cc: David Howells <dhowells@redhat.com>
> >>>> Cc: David Woodhouse <dwmw2@infradead.org>
> >>>> Signed-off-by: Mickaël Salaün <mic@linux.microsoft.com>
> >>>> Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
> >>>
> >>> I get this with a self-signed cert:
> >>>
> >>> certs/Makefile:18: *** target pattern contains no '%'. Stop.
> >>>
> >>> CONFIG_SYSTEM_BLACKLIST_HASH_LIST="tbs:8eed1340eef37c1dc84d996406ad05c7dbb3eade19132d688408ca2f63904869"
> >>
> >> As said in the Kconfig documentation for
> >> CONFIG_SYSTEM_BLACKLIST_HASH_LIST, you need to provide a file with the
> >> list, not to set the string directly in the configuration variable. This
> >> patch series didn't change this behavior. The same kind of macros are
> >> used for CONFIG_MODULE_SIG_KEY.
> >
> > OK, the documentation just states that:
> >
> > "Hashes to be preloaded into the system blacklist keyring"
> >
> > No mention about a file. I'd add a patch to update this documentation.
>
> I was referring to the full description:
>
> config SYSTEM_BLACKLIST_HASH_LIST
> string "Hashes to be preloaded into the system blacklist keyring"
> depends on SYSTEM_BLACKLIST_KEYRING
> help
> If set, this option should be the filename of a list of hashes in the
> form "<hash>", "<hash>", ... . This will be included into a C
> wrapper to incorporate the list into the kernel. Each <hash> should
> be a string of hex digits.
>
> …but the short description doesn't mention filename.
Aah.
Anyway, I'll test the next version. Now all should be clear how
to approach that. Thanks.
/Jarkko
next prev parent reply other threads:[~2021-01-21 15:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-14 15:18 [PATCH v3 00/10] Enable root to update the blacklist keyring Mickaël Salaün
2021-01-14 15:19 ` [PATCH v3 01/10] certs/blacklist: fix kernel doc interface issue Mickaël Salaün
2021-01-20 3:39 ` Jarkko Sakkinen
2021-01-14 15:19 ` [PATCH v3 02/10] certs: Fix blacklisted hexadecimal hash string check Mickaël Salaün
2021-01-20 3:43 ` Jarkko Sakkinen
2021-01-20 11:12 ` Mickaël Salaün
2021-01-20 23:44 ` Jarkko Sakkinen
2021-01-14 15:19 ` [PATCH v3 03/10] PKCS#7: Fix missing include Mickaël Salaün
2021-01-20 3:44 ` Jarkko Sakkinen
2021-01-14 15:19 ` [PATCH v3 04/10] certs: Fix blacklist flag type confusion Mickaël Salaün
2021-01-20 3:55 ` Jarkko Sakkinen
2021-01-20 11:15 ` Mickaël Salaün
2021-01-20 23:45 ` Jarkko Sakkinen
2021-01-14 15:19 ` [PATCH v3 05/10] certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID Mickaël Salaün
2021-01-20 5:15 ` Jarkko Sakkinen
2021-01-20 11:17 ` Mickaël Salaün
2021-01-20 23:48 ` Jarkko Sakkinen
2021-01-14 15:19 ` [PATCH v3 06/10] certs: Make blacklist_vet_description() more strict Mickaël Salaün
2021-01-20 4:16 ` Jarkko Sakkinen
2021-01-20 11:23 ` Mickaël Salaün
2021-01-14 15:19 ` [PATCH v3 07/10] certs: Factor out the blacklist hash creation Mickaël Salaün
2021-01-14 15:19 ` [PATCH v3 08/10] certs: Check that builtin blacklist hashes are valid Mickaël Salaün
2021-01-20 5:19 ` Jarkko Sakkinen
2021-01-20 11:57 ` Mickaël Salaün
2021-01-20 23:53 ` Jarkko Sakkinen
2021-01-21 9:18 ` Mickaël Salaün
2021-01-21 15:21 ` Jarkko Sakkinen [this message]
2021-01-14 15:19 ` [PATCH v3 09/10] certs: Allow root user to append signed hashes to the blacklist keyring Mickaël Salaün
2021-01-15 13:06 ` Mimi Zohar
2021-01-20 5:23 ` Jarkko Sakkinen
2021-01-20 11:24 ` Mickaël Salaün
2021-01-14 15:19 ` [PATCH v3 10/10] tools/certs: Add print-cert-tbs-hash.sh Mickaël Salaün
2021-01-15 9:28 ` [PATCH v3 00/10] Enable root to update the blacklist keyring Jarkko Sakkinen
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