From: Mimi Zohar <zohar@linux.ibm.com>
To: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
dhowells@redhat.com, matthewgarrett@google.com,
sashal@kernel.org, jamorris@linux.microsoft.com,
linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 01/10] IMA: Defined an IMA hook to measure keys on key create or update
Date: Wed, 06 Nov 2019 17:43:09 -0500 [thread overview]
Message-ID: <1573080189.5028.313.camel@linux.ibm.com> (raw)
In-Reply-To: <20191106190116.2578-2-nramas@linux.microsoft.com>
On Wed, 2019-11-06 at 11:01 -0800, Lakshmi Ramasubramanian wrote:
> Asymmetric keys used for verifying file signatures or certificates
> are currently not included in the IMA measurement list.
>
> This patch defines a new IMA hook namely ima_post_key_create_or_update()
> to measure asymmetric keys.
>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
> ---
> security/integrity/ima/ima_main.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
> index d7e987baf127..a0e233afe876 100644
> --- a/security/integrity/ima/ima_main.c
> +++ b/security/integrity/ima/ima_main.c
> @@ -721,6 +721,22 @@ void ima_kexec_cmdline(const void *buf, int size)
> KEXEC_CMDLINE, 0);
> }
>
> +/**
> + * ima_post_key_create_or_update - measure asymmetric keys
> + * @keyring: keyring to which the key is linked to
> + * @key: created or updated key
> + * @flags: key flags
> + * @create: flag indicating whether the key was created or updated
> + *
> + * Keys can only be measured, not appraised.
> + */
> +void ima_post_key_create_or_update(struct key *keyring, struct key *key,
> + unsigned long flags, bool create)
> +{
> + if ((keyring != NULL) && (key != NULL))
> + return;
I would move the patch that defines the "keyring=" policy option prior
to this one. Include the call to process_buffer_measurement() in this
patch. A subsequent patch would add support to defer measuring the
key, by calling a function named something like
ima_queue_key_measurement().
Mimi
> +}
> +
> static int __init init_ima(void)
> {
> int error;
next prev parent reply other threads:[~2019-11-06 22:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-06 19:01 [PATCH v4 0/10] KEYS: Measure keys when they are created or updated Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 01/10] IMA: Defined an IMA hook to measure keys on key create or update Lakshmi Ramasubramanian
2019-11-06 22:43 ` Mimi Zohar [this message]
2019-11-07 0:21 ` Lakshmi Ramasubramanian
2019-11-07 3:40 ` Mimi Zohar
2019-11-07 18:42 ` Lakshmi Ramasubramanian
2019-11-07 20:53 ` Mimi Zohar
2019-11-07 21:12 ` Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 02/10] IMA: Added KEYRING_CHECK func in IMA policy to measure keys Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 03/10] IMA: Added keyrings= option in IMA policy to only measure keys added to the specified keyrings Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 04/10] IMA: Read keyrings= option from the IMA policy into ima_rule_entry Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 05/10] IMA: Updated IMA policy functions to return keyrings option read from the policy Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 06/10] IMA: Measure key if the IMA policy allows measurement for the keyring to which the key is linked to Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 07/10] IMA: Added a boolean flag to track IMA initialization status Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 08/10] IMA: Defined functions to queue and dequeue keys for measurement Lakshmi Ramasubramanian
2019-11-06 22:44 ` Mimi Zohar
2019-11-06 23:52 ` Lakshmi Ramasubramanian
2019-11-07 2:20 ` Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 09/10] IMA: Call queue and dequeue functions to measure keys Lakshmi Ramasubramanian
2019-11-06 19:01 ` [PATCH v4 10/10] KEYS: Call the IMA hook to measure key when a new key is created or an existing key is updated Lakshmi Ramasubramanian
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