// 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" 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 a hash. */static __init void uefi_blacklist_hash(const char *source, const void *data,				       size_t len, const char *type,				       size_t type_len){	char *hash, *p; 	hash = kmalloc(type_len + len * 2 + 1, GFP_KERNEL);	if (!hash)		return;	p = memcpy(hash, type, type_len);	p += type_len;	bin2hex(p, data, len);	p += len * 2;	*p = 0; 	mark_hash_blacklisted(hash);	kfree(hash);} /* * Blacklist an X509 TBS hash. */static __init void uefi_blacklist_x509_tbs(const char *source,					   const void *data, size_t len){	uefi_blacklist_hash(source, data, len, "tbs:", 4);} /* * Blacklist the hash of an executable. */static __init void uefi_blacklist_binary(const char *source,					 const void *data, size_t len){	uefi_blacklist_hash(source, data, len, "bin:", 4);} /* * 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 and MokListRT 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 0;} /* * 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 0;}