// SPDX-License-Identifier: GPL-2.0 #include <linux/kernel.h>#include <linux/sched.h>#include <linux/cred.h>#include <linux/err.h>#include <linux/efi.h>#include <linux/slab.h>#include <keys/asymmetric-type.h>#include <keys/system_keyring.h>#include "../integrity.h"#include "keyring_handler.h" static efi_guid_t efi_cert_x509_guid __initdata = EFI_CERT_X509_GUID;static efi_guid_t efi_cert_x509_sha256_guid __initdata =	EFI_CERT_X509_SHA256_GUID;static efi_guid_t efi_cert_sha256_guid __initdata = EFI_CERT_SHA256_GUID; /* * Blacklist an X509 TBS hash. */static __init void uefi_blacklist_x509_tbs(const char *source,					   const void *data, size_t len){	mark_hash_blacklisted(data, len, BLACKLIST_HASH_X509_TBS);} /* * Blacklist the hash of an executable. */static __init void uefi_blacklist_binary(const char *source,					 const void *data, size_t len){	mark_hash_blacklisted(data, len, BLACKLIST_HASH_BINARY);} /* * Add an X509 cert to the revocation list. */static __init void uefi_revocation_list_x509(const char *source,					     const void *data, size_t len){	add_key_to_revocation_list(data, len);} /* * Return the appropriate handler for particular signature list types found in * the UEFI db tables. */__init efi_element_handler_t get_handler_for_db(const efi_guid_t *sig_type){	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)		return add_to_platform_keyring;	return NULL;} /* * Return the appropriate handler for particular signature list types found in * the MokListRT tables. */__init efi_element_handler_t get_handler_for_mok(const efi_guid_t *sig_type){	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0) {		if (IS_ENABLED(CONFIG_INTEGRITY_MACHINE_KEYRING) &&		    imputed_trust_enabled())			return add_to_machine_keyring;		else			return add_to_platform_keyring;	}	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;} __init efi_element_handler_t get_handler_for_code_signing_keys(const efi_guid_t *sig_type){	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)		return add_to_secondary_keyring; 	return NULL;} /* * Return the appropriate handler for particular signature list types found in * the UEFI dbx and MokListXRT tables. */__init efi_element_handler_t get_handler_for_dbx(const efi_guid_t *sig_type){	if (efi_guidcmp(*sig_type, efi_cert_x509_sha256_guid) == 0)		return uefi_blacklist_x509_tbs;	if (efi_guidcmp(*sig_type, efi_cert_sha256_guid) == 0)		return uefi_blacklist_binary;	if (efi_guidcmp(*sig_type, efi_cert_x509_guid) == 0)		return uefi_revocation_list_x509;	return NULL;}