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 v5 01/10] IMA: Added KEYRING_CHECK func in IMA policy to measure keys
Date: Tue, 12 Nov 2019 12:04:56 -0500 [thread overview]
Message-ID: <1573578296.17949.41.camel@linux.ibm.com> (raw)
In-Reply-To: <20191111193303.12781-2-nramas@linux.microsoft.com>
On Mon, 2019-11-11 at 11:32 -0800, Lakshmi Ramasubramanian wrote:
> IMA policy needs to support a func to enable measurement of
> asymmetric keys.
>
> This patch defines a new IMA policy func namely KEYRING_CHECK to
> measure asymmetric keys.
This new feature measures "keys" based on policy, not "keyrings".
Please change the name to KEY_CHECK.
>
> Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com>
> ---
> Documentation/ABI/testing/ima_policy | 6 ++++++
> security/integrity/ima/ima.h | 1 +
> security/integrity/ima/ima_policy.c | 4 +++-
> 3 files changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy
> index 29aaedf33246..341df49b5ad1 100644
> --- a/Documentation/ABI/testing/ima_policy
> +++ b/Documentation/ABI/testing/ima_policy
> @@ -30,6 +30,7 @@ Description:
> [FIRMWARE_CHECK]
> [KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK]
> [KEXEC_CMDLINE]
> + [KEYRING_CHECK]
> mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND]
> [[^]MAY_EXEC]
> fsmagic:= hex value
> @@ -113,3 +114,8 @@ Description:
> Example of appraise rule allowing modsig appended signatures:
>
> appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig
> +
> + Example of measure rule using KEYRING_CHECK to measure
> + all keys:
> +
> + measure func=KEYRING_CHECK
> diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
> index df4ca482fb53..7f23405b2718 100644
> --- a/security/integrity/ima/ima.h
> +++ b/security/integrity/ima/ima.h
> @@ -193,6 +193,7 @@ static inline unsigned long ima_hash_key(u8 *digest)
> hook(KEXEC_INITRAMFS_CHECK) \
> hook(POLICY_CHECK) \
> hook(KEXEC_CMDLINE) \
> + hook(KEYRING_CHECK) \
> hook(MAX_CHECK)
> #define __ima_hook_enumify(ENUM) ENUM,
>
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index f19a895ad7cd..9ca32ffaaa9d 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -373,7 +373,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode,
> {
> int i;
>
> - if (func == KEXEC_CMDLINE) {
> + if ((func == KEXEC_CMDLINE) || (func == KEYRING_CHECK)) {
> if ((rule->flags & IMA_FUNC) && (rule->func == func))
> return true;
> return false;
> @@ -997,6 +997,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
> entry->func = POLICY_CHECK;
> else if (strcmp(args[0].from, "KEXEC_CMDLINE") == 0)
> entry->func = KEXEC_CMDLINE;
> + else if (strcmp(args[0].from, "KEYRING_CHECK") == 0)
> + entry->func = KEYRING_CHECK;
> else
> result = -EINVAL;
> if (!result)
next prev parent reply other threads:[~2019-11-12 17:05 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-11 19:32 [PATCH v5 0/10] KEYS: Measure keys when they are created or updated Lakshmi Ramasubramanian
2019-11-11 19:32 ` [PATCH v5 01/10] IMA: Added KEYRING_CHECK func in IMA policy to measure keys Lakshmi Ramasubramanian
2019-11-12 17:04 ` Mimi Zohar [this message]
2019-11-12 17:37 ` Lakshmi Ramasubramanian
2019-11-11 19:32 ` [PATCH v5 02/10] IMA: Added keyrings= option in IMA policy to only measure keys added to the specified keyrings Lakshmi Ramasubramanian
2019-11-12 17:05 ` Mimi Zohar
2019-11-12 17:43 ` Lakshmi Ramasubramanian
2019-11-12 17:58 ` Mimi Zohar
2019-11-11 19:32 ` [PATCH v5 03/10] IMA: Read keyrings= option from the IMA policy into ima_rule_entry Lakshmi Ramasubramanian
2019-11-11 19:32 ` [PATCH v5 04/10] IMA: Updated IMA policy functions to return keyrings option read from the policy Lakshmi Ramasubramanian
2019-11-12 17:05 ` Mimi Zohar
2019-11-12 17:47 ` Lakshmi Ramasubramanian
2019-11-12 18:06 ` Mimi Zohar
2019-11-11 19:32 ` [PATCH v5 05/10] IMA: Measure key if the IMA policy allows measurement for the keyring to which the key is linked to Lakshmi Ramasubramanian
2019-11-11 19:32 ` [PATCH v5 06/10] IMA: Defined an IMA hook to measure keys on key create or update Lakshmi Ramasubramanian
2019-11-11 19:33 ` [PATCH v5 07/10] KEYS: Call the IMA hook to measure key when a new key is created or an existing key is updated Lakshmi Ramasubramanian
2019-11-11 19:33 ` [PATCH v5 08/10] IMA: Added a flag to determine whether IMA hook can process the key now or has to queue for processing later Lakshmi Ramasubramanian
2019-11-11 19:33 ` [PATCH v5 09/10] IMA: Defined functions to queue and dequeue keys for measurement Lakshmi Ramasubramanian
2019-11-11 19:33 ` [PATCH v5 10/10] IMA: Call queue and dequeue functions to measure keys Lakshmi Ramasubramanian
2019-11-11 19:41 ` [PATCH v5 0/10] KEYS: Measure keys when they are created or updated Lakshmi Ramasubramanian
2019-11-12 17:08 ` Mimi Zohar
2019-11-12 17:52 ` Lakshmi Ramasubramanian
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