linux-kernel - [PATCH RFC v2 09/12] KEYS: add a reference to mok keyring

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Date:   Mon, 26 Jul 2021 13:13:16 -0400
From:   Eric Snowberg <eric.snowberg@...cle.com>
To:     keyrings@...r.kernel.org, linux-integrity@...r.kernel.org,
        zohar@...ux.ibm.com, dhowells@...hat.com, dwmw2@...radead.org,
        herbert@...dor.apana.org.au, davem@...emloft.net,
        jarkko@...nel.org, jmorris@...ei.org, serge@...lyn.com
Cc:     eric.snowberg@...cle.com, keescook@...omium.org,
        gregkh@...uxfoundation.org, torvalds@...ux-foundation.org,
        scott.branden@...adcom.com, weiyongjun1@...wei.com,
        nayna@...ux.ibm.com, ebiggers@...gle.com, ardb@...nel.org,
        nramas@...ux.microsoft.com, lszubowi@...hat.com,
        linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        James.Bottomley@...senPartnership.com, pjones@...hat.com,
        glin@...e.com, konrad.wilk@...cle.com
Subject: [PATCH RFC v2 09/12] KEYS: add a reference to mok keyring

Expose the .mok keyring created in integrity code by adding
a reference.  This makes the mok keyring accessible for keyring
restrictions in the future.

Signed-off-by: Eric Snowberg <eric.snowberg@...cle.com>
---
v2: Initial version
---
 certs/system_keyring.c        | 5 +++++
 include/keys/system_keyring.h | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index 0a7b16c28a72..dcaf74102ab2 100644
--- a/certs/system_keyring.c
+++ b/certs/system_keyring.c
@@ -27,6 +27,7 @@ static struct key *secondary_trusted_keys;
 #endif
 #ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
 static struct key *platform_trusted_keys;
+static struct key *mok_trusted_keys;
 #endif
 
 extern __initconst const u8 system_certificate_list[];
@@ -317,4 +318,8 @@ void __init set_platform_trusted_keys(struct key *keyring)
 {
 	platform_trusted_keys = keyring;
 }
+void __init set_mok_trusted_keys(struct key *keyring)
+{
+	mok_trusted_keys = keyring;
+}
 #endif
diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
index 2041254d74f4..1adf78ddc035 100644
--- a/include/keys/system_keyring.h
+++ b/include/keys/system_keyring.h
@@ -94,10 +94,14 @@ static inline struct key *get_ima_blacklist_keyring(void)
 #if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \
 	defined(CONFIG_SYSTEM_TRUSTED_KEYRING)
 extern void __init set_platform_trusted_keys(struct key *keyring);
+extern void __init set_mok_trusted_keys(struct key *keyring);
 #else
 static inline void set_platform_trusted_keys(struct key *keyring)
 {
 }
+static void __init set_mok_trusted_keys(struct key *keyring)
+{
+}
 #endif
 
 #endif /* _KEYS_SYSTEM_KEYRING_H */
-- 
2.18.4