@@ -69,6 +69,14 @@ __init efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type)
return NULL;
}
+__init efi_element_handler_t get_handler_for_ca_keys(const efi_guid_t *sig_type)
+{
+ if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)
+ return add_to_machine_keyring;
+
+ return NULL;
+}
+
/*
* Return the appropriate handler for particular signature list types found in
* the UEFI dbx and MokListXRT tables.
@@ -29,6 +29,11 @@ efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type);
*/
efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type);
+/*
+ * Return the handler for particular signature list types for CA keys.
+ */
+efi_element_handler_t get_handler_for_ca_keys(const efi_guid_t *sig_type);
+
/*
* Return the handler for particular signature list types found in the dbx.
*/
@@ -59,6 +59,7 @@ static __init void *get_cert_list(u8 *key, unsigned long keylen, u64 *size)
static int __init load_powerpc_certs(void)
{
void *db = NULL, *dbx = NULL, *data = NULL;
+ void *trustedca = NULL;
u64 dsize = 0;
u64 offset = 0;
int rc = 0;
@@ -120,6 +121,22 @@ static int __init load_powerpc_certs(void)
kfree(data);
}
+ data = get_cert_list("trustedcadb", 12, &dsize);
+ if (!data) {
+ pr_info("Couldn't get trustedcadb list from firmware\n");
+ } else if (IS_ERR(data)) {
+ rc = PTR_ERR(data);
+ pr_err("Error reading trustedcadb from firmware: %d\n", rc);
+ } else {
+ extract_esl(trustedca, data, dsize, offset);
+
+ rc = parse_efi_signature_list("powerpc:trustedca", trustedca, dsize,
+ get_handler_for_ca_keys);
+ if (rc)
+ pr_err("Couldn't parse trustedcadb signatures: %d\n", rc);
+ kfree(data);
+ }
+
return rc;
}
late_initcall(load_powerpc_certs);
Keys that derive their trust from an entity such as a security officer, administrator, system owner, or machine owner are said to have "imputed trust". CA keys with imputed trust can be loaded onto the machine keyring. The mechanism for loading these keys onto the machine keyring is platform dependent. Load keys stored in the variable trustedcadb onto the .machine keyring on PowerVM platform. Signed-off-by: Nayna Jain <nayna@linux.ibm.com> Reviewed-and-tested-by: Mimi Zohar <zohar@linux.ibm.com> --- .../integrity/platform_certs/keyring_handler.c | 8 ++++++++ .../integrity/platform_certs/keyring_handler.h | 5 +++++ .../integrity/platform_certs/load_powerpc.c | 17 +++++++++++++++++ 3 files changed, 30 insertions(+)