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From: Mimi Zohar <zohar@linux.ibm.com>
To: Kairui Song <kasong@redhat.com>, linux-kernel@vger.kernel.org
Cc: dhowells@redhat.com, dwmw2@infradead.org,
	jwboyer@fedoraproject.org, keyrings@vger.kernel.org,
	jmorris@namei.org, serge@hallyn.com, bauerman@linux.ibm.com,
	ebiggers@google.com, nayna@linux.ibm.com, dyoung@redhat.com,
	linux-integrity@vger.kernel.org, kexec@lists.infradead.org
Subject: Re: [RFC PATCH 1/2] integrity, KEYS: add a reference to platform keyring
Date: Wed, 09 Jan 2019 14:21:11 -0500
Message-ID: <1547061671.19931.239.camel@linux.ibm.com> (raw)
In-Reply-To: <20190109164824.19708-2-kasong@redhat.com>

On Thu, 2019-01-10 at 00:48 +0800, Kairui Song wrote:
> Currently kexec_file_load will verify the kernel image being loaded
> against .builtin_trusted_keys or .secondary_trusted_keys, but the
> image could be signed with third part keys which will be provided by
> platform or firmware and the keys won't be available in keyrings mentioned
> above.
> 
> After commit ea93102f3224 ('integrity: Define a trusted platform keyring')
> a .platform keyring is introduced to store the keys provided by platform
> or firmware. And with a few following commits, now keys required to verify
> the image is being imported to .platform keyring, but currently, only
> IMA-appraisal could use the keyring and verify the image.
> 
> This patch exposes the .platform and makes other components, like
> kexec_file_load, could use this .platform keyring to verify the
> kernel image.

The "platform" keyring was upstreamed in order to verify the kernel
image being loaded by the kexec_file_load syscall.  The intentions of
this patch description needs to be clearer.

> 
> Suggested-by: Mimi Zohar <zohar@linux.ibm.com>
> Signed-off-by: Kairui Song <kasong@redhat.com>
> ---
>  certs/system_keyring.c        | 3 +++
>  include/keys/system_keyring.h | 5 +++++
>  security/integrity/digsig.c   | 4 ++++
>  3 files changed, 12 insertions(+)
> 
> diff --git a/certs/system_keyring.c b/certs/system_keyring.c
> index 81728717523d..a61b95390b80 100644
> --- a/certs/system_keyring.c
> +++ b/certs/system_keyring.c
> @@ -24,6 +24,9 @@ static struct key *builtin_trusted_keys;
>  #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
>  static struct key *secondary_trusted_keys;
>  #endif
> +#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
> +struct key *platform_trusted_keys;

Please make it static.

Mimi

> +#endif


  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-09 16:48 [RFC PATCH 0/2] let kexec_file_load use platform keyring to verify the kernel image Kairui Song
2019-01-09 16:48 ` [RFC PATCH 1/2] integrity, KEYS: add a reference to platform keyring Kairui Song
2019-01-09 19:21   ` Mimi Zohar [this message]
2019-01-09 16:48 ` [RFC PATCH 2/2] kexec, KEYS: Make use of platform keyring for signature verify Kairui Song
2019-01-11 13:43   ` Dave Young
2019-01-11 16:13     ` Mimi Zohar
2019-01-13  1:39       ` Dave Young
2019-01-14  3:28         ` Kairui Song
2019-01-14 16:10         ` Mimi Zohar
2019-01-15  2:42           ` Dave Young
2019-01-15  3:10             ` Kairui Song
2019-01-15 15:17             ` nayna

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