On Wed, Jan 05, 2022 at 06:50:08PM -0500, Eric Snowberg wrote:
> Expose the .machine keyring created in integrity code by adding
> a reference. Store a reference to the machine keyring in
> system keyring code. The system keyring code needs this to complete
> the keyring link to the machine keyring.
>
> Signed-off-by: Eric Snowberg <eric.snowberg@xxxxxxxxxx>
> ---
> v2: Initial version
> v3: Unmodified from v2
> v4: Removed trust_moklist check
> v5: Rename to machine keyring
> v8: Unmodified from v5
> v9: Combine with "add reference to machine keyring" patch
> ---
> certs/system_keyring.c | 9 +++++++++
> include/keys/system_keyring.h | 8 ++++++++
> security/integrity/digsig.c | 2 ++
> 3 files changed, 19 insertions(+)
>
> diff --git a/certs/system_keyring.c b/certs/system_keyring.c
> index 692365dee2bd..08ea542c8096 100644
> --- a/certs/system_keyring.c
> +++ b/certs/system_keyring.c
> @@ -22,6 +22,9 @@ static struct key *builtin_trusted_keys;
> #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
> static struct key *secondary_trusted_keys;
> #endif
> +#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
> +static struct key *machine_trusted_keys;
> +#endif
> #ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
> static struct key *platform_trusted_keys;
> #endif
> @@ -91,6 +94,12 @@ static __init struct key_restriction *get_builtin_and_secondary_restriction(void
> return restriction;
> }
> #endif
> +#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
> +void __init set_machine_trusted_keys(struct key *keyring)
> +{
> + machine_trusted_keys = keyring;
> +}
> +#endif
>
> /*
> * Create the trusted keyrings
> diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
> index 6acd3cf13a18..98c9b10cdc17 100644
> --- a/include/keys/system_keyring.h
> +++ b/include/keys/system_keyring.h
> @@ -38,6 +38,14 @@ extern int restrict_link_by_builtin_and_secondary_trusted(
> #define restrict_link_by_builtin_and_secondary_trusted restrict_link_by_builtin_trusted
> #endif
>
> +#ifdef CONFIG_INTEGRITY_MACHINE_KEYRING
> +extern void __init set_machine_trusted_keys(struct key *keyring);
> +#else
> +static inline void __init set_machine_trusted_keys(struct key *keyring)
> +{
> +}
> +#endif
> +
> extern struct pkcs7_message *pkcs7;
> #ifdef CONFIG_SYSTEM_BLACKLIST_KEYRING
> extern int mark_hash_blacklisted(const char *hash);
> diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
> index 2b7fa85613c0..7b719aa76188 100644
> --- a/security/integrity/digsig.c
> +++ b/security/integrity/digsig.c
> @@ -112,6 +112,8 @@ static int __init __integrity_init_keyring(const unsigned int id,
> } else {
> if (id == INTEGRITY_KEYRING_PLATFORM)
> set_platform_trusted_keys(keyring[id]);
> + if (id == INTEGRITY_KEYRING_MACHINE)
> + set_machine_trusted_keys(keyring[id]);
> if (id == INTEGRITY_KEYRING_IMA)
> load_module_cert(keyring[id]);
> }
> --
> 2.18.4
>
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
BR, Jarkko
