[PATCH v10 4/8] KEYS: store reference to machine keyring
From: Eric Snowberg <eric.snowberg@oracle.com>
Date: 2022-01-26 03:00:26
Also in:
keyrings, linux-efi, lkml
Subsystem:
certificate handling, extended verification module (evm), integrity measurement architecture (ima), keys/keyrings, security subsystem, the rest · Maintainers:
David Howells, David Woodhouse, Mimi Zohar, Roberto Sassu, Dmitry Kasatkin, Jarkko Sakkinen, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
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@oracle.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Tested-by: Mimi Zohar <zohar@linux.ibm.com> --- 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 v10: Added Jarkko's Reviewed-by and Mimi's Tested-by --- 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