diff options
| -rw-r--r-- | Documentation/admin-guide/LSM/ipe.rst | 5 | ||||
| -rw-r--r-- | security/ipe/Kconfig | 19 | ||||
| -rw-r--r-- | security/ipe/policy.c | 14 |
3 files changed, 36 insertions, 2 deletions
diff --git a/Documentation/admin-guide/LSM/ipe.rst b/Documentation/admin-guide/LSM/ipe.rst index fcb3c493104b..f93a467db628 100644 --- a/Documentation/admin-guide/LSM/ipe.rst +++ b/Documentation/admin-guide/LSM/ipe.rst @@ -223,7 +223,10 @@ are signed through the PKCS#7 message format to enforce some level of authorization of the policies (prohibiting an attacker from gaining unconstrained root, and deploying an "allow all" policy). These policies must be signed by a certificate that chains to the -``SYSTEM_TRUSTED_KEYRING``. With openssl, the policy can be signed by:: +``SYSTEM_TRUSTED_KEYRING``, or to the secondary and/or platform keyrings if +``CONFIG_IPE_POLICY_SIG_SECONDARY_KEYRING`` and/or +``CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING`` are enabled, respectively. +With openssl, the policy can be signed by:: openssl smime -sign \ -in "$MY_POLICY" \ diff --git a/security/ipe/Kconfig b/security/ipe/Kconfig index 3ab582606ed2..3c75bf267da4 100644 --- a/security/ipe/Kconfig +++ b/security/ipe/Kconfig @@ -31,6 +31,25 @@ config IPE_BOOT_POLICY If unsure, leave blank. +config IPE_POLICY_SIG_SECONDARY_KEYRING + bool "IPE policy update verification with secondary keyring" + default y + depends on SECONDARY_TRUSTED_KEYRING + help + Also allow the secondary trusted keyring to verify IPE policy + updates. + + If unsure, answer Y. + +config IPE_POLICY_SIG_PLATFORM_KEYRING + bool "IPE policy update verification with platform keyring" + default y + depends on INTEGRITY_PLATFORM_KEYRING + help + Also allow the platform keyring to verify IPE policy updates. + + If unsure, answer Y. + menu "IPE Trust Providers" config IPE_PROP_DM_VERITY diff --git a/security/ipe/policy.c b/security/ipe/policy.c index 4cea067adf6a..45f7d6a0ed23 100644 --- a/security/ipe/policy.c +++ b/security/ipe/policy.c @@ -169,9 +169,21 @@ struct ipe_policy *ipe_new_policy(const char *text, size_t textlen, goto err; } - rc = verify_pkcs7_signature(NULL, 0, new->pkcs7, pkcs7len, NULL, + rc = verify_pkcs7_signature(NULL, 0, new->pkcs7, pkcs7len, +#ifdef CONFIG_IPE_POLICY_SIG_SECONDARY_KEYRING + VERIFY_USE_SECONDARY_KEYRING, +#else + NULL, +#endif VERIFYING_UNSPECIFIED_SIGNATURE, set_pkcs7_data, new); +#ifdef CONFIG_IPE_POLICY_SIG_PLATFORM_KEYRING + if (rc == -ENOKEY) + rc = verify_pkcs7_signature(NULL, 0, new->pkcs7, pkcs7len, + VERIFY_USE_PLATFORM_KEYRING, + VERIFYING_UNSPECIFIED_SIGNATURE, + set_pkcs7_data, new); +#endif if (rc) goto err; } else { |