//// SPDX-License-Identifier: GPL-2.0-or-later
///* System trusted keyring for trusted public keys
// *
// * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
// * Written by David Howells (dhowells@redhat.com)
// */
//
////#include <linux/export.h>
////#include <linux/kernel.h>
////#include <linux/sched.h>
////#include <linux/cred.h>
////#include <linux/err.h>
////#include <linux/slab.h>
////#include <linux/verification.h>
////#include <keys/asymmetric-type.h>
////#include <keys/system_keyring.h>
////#include <crypto/pkcs7.h>
//
//
//#include "pkcs7.h"
//#include "errno.h"
//
//
//#include "../rewrite/lib_vsign_rewritefunc.h"
//
//
////
//// macro
////
//
//
////laji daima
//#define pr_debug
//#define pr_devel
//#define pr_warn
//#define pr_err
//#define printk
//
//#define GFP_ATOMIC	/*(__GFP_HIGH|__GFP_ATOMIC|__GFP_KSWAPD_RECLAIM)*/1
//#define GFP_KERNEL	/*(__GFP_RECLAIM | __GFP_IO | __GFP_FS)*/2
//#define GFP_KERNEL_ACCOUNT /*(GFP_KERNEL | __GFP_ACCOUNT)*/3
//#define GFP_NOWAIT	/*(__GFP_KSWAPD_RECLAIM)*/4
//#define GFP_NOIO	/*(__GFP_RECLAIM)*/5
//#define GFP_NOFS	/*(__GFP_RECLAIM | __GFP_IO)*/6
//#define GFP_USER	/*(__GFP_RECLAIM | __GFP_IO | __GFP_FS | __GFP_HARDWALL)*/7
//#define GFP_DMA		/*__GFP_DMA*/8
//#define GFP_DMA32	/*__GFP_DMA32*/9
//#define GFP_HIGHUSER	/*(GFP_USER | __GFP_HIGHMEM)*/10
//#define GFP_HIGHUSER_MOVABLE	/*(GFP_HIGHUSER | __GFP_MOVABLE)*/11
//#define GFP_TRANSHUGE_LIGHT	12
//#define GFP_TRANSHUGE	/*(GFP_TRANSHUGE_LIGHT | __GFP_DIRECT_RECLAIM)*/13
//
//
//#define ERR_PTR(err)    ((void *)((long)(err)))
//#define PTR_ERR(ptr)    ((long)(ptr))
//#define IS_ERR(ptr)     ((unsigned long)(ptr) > (unsigned long)(-1000))
//
//
//#define CONFIG_SECONDARY_TRUSTED_KEYRING
//#define CONFIG_INTEGRITY_PLATFORM_KEYRING
//
//#define CONFIG_SYSTEM_DATA_VERIFICATION
//
//
//
//
//static struct key *builtin_trusted_keys;
//#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
//static struct key *secondary_trusted_keys;
//#endif
//#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
//static struct key *platform_trusted_keys;
//#endif
//
////extern __initconst const u8 system_certificate_list[];
////extern __initconst const unsigned long system_certificate_list_size;
//
//
///**
// * restrict_link_to_builtin_trusted - Restrict keyring addition by built in CA
// *
// * Restrict the addition of keys into a keyring based on the key-to-be-added
// * being vouched for by a key in the built in system keyring.
// */
//int restrict_link_by_builtin_trusted(struct key *dest_keyring,
//				     const struct key_type *type,
//				     const union key_payload *payload,
//				     struct key *restriction_key)
//{
//	return restrict_link_by_signature(dest_keyring, type, payload,
//					  builtin_trusted_keys);
//}
//
//#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
///**
// * restrict_link_by_builtin_and_secondary_trusted - Restrict keyring
// *   addition by both builtin and secondary keyrings
// *
// * Restrict the addition of keys into a keyring based on the key-to-be-added
// * being vouched for by a key in either the built-in or the secondary system
// * keyrings.
// */
//int restrict_link_by_builtin_and_secondary_trusted(
//	struct key *dest_keyring,
//	const struct key_type *type,
//	const union key_payload *payload,
//	struct key *restrict_key)
//{
//	/* If we have a secondary trusted keyring, then that contains a link
//	 * through to the builtin keyring and the search will follow that link.
//	 */
//	if (type == &key_type_keyring &&
//	    dest_keyring == secondary_trusted_keys &&
//	    payload == &builtin_trusted_keys->payload)
//		/* Allow the builtin keyring to be added to the secondary */
//		return 0;
//
//	return restrict_link_by_signature(dest_keyring, type, payload,
//					  secondary_trusted_keys);
//}
//
///**
// * Allocate a struct key_restriction for the "builtin and secondary trust"
// * keyring. Only for use in system_trusted_keyring_init().
// */
//static __init struct key_restriction *get_builtin_and_secondary_restriction(void)
//{
//	struct key_restriction *restriction;
//
//	restriction = kzalloc(sizeof(struct key_restriction), GFP_KERNEL);
//
//	if (!restriction)
//		panic("Can't allocate secondary trusted keyring restriction\n");
//
//	restriction->check = restrict_link_by_builtin_and_secondary_trusted;
//
//	return restriction;
//}
//#endif
//
///*
// * Create the trusted keyrings
// */
////static __init int system_trusted_keyring_init(void)
////{
////	pr_notice("Initialise system trusted keyrings\n");
////
////	builtin_trusted_keys =
////		keyring_alloc(".builtin_trusted_keys",
////			      KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
////			      ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
////			      KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
////			      KEY_ALLOC_NOT_IN_QUOTA,
////			      NULL, NULL);
////	if (IS_ERR(builtin_trusted_keys))
////		panic("Can't allocate builtin trusted keyring\n");
////
////#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
////	secondary_trusted_keys =
////		keyring_alloc(".secondary_trusted_keys",
////			      KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
////			      ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
////			       KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH |
////			       KEY_USR_WRITE),
////			      KEY_ALLOC_NOT_IN_QUOTA,
////			      get_builtin_and_secondary_restriction(),
////			      NULL);
////	if (IS_ERR(secondary_trusted_keys))
////		panic("Can't allocate secondary trusted keyring\n");
////
////	if (key_link(secondary_trusted_keys, builtin_trusted_keys) < 0)
////		panic("Can't link trusted keyrings\n");
////#endif
////
////	return 0;
////}
//
///*
// * Must be initialised before we try and load the keys into the keyring.
// */
////device_initcall(system_trusted_keyring_init);
////
/////*
//// * Load the compiled-in list of X.509 certificates.
//// */
////static __init int load_system_certificate_list(void)
////{
////	key_ref_t key;
////	const u8 *p, *end;
////	size_t plen;
////
////	pr_notice("Loading compiled-in X.509 certificates\n");
////
////	p = system_certificate_list;
////	end = p + system_certificate_list_size;
////	while (p < end) {
////		/* Each cert begins with an ASN.1 SEQUENCE tag and must be more
////		 * than 256 bytes in size.
////		 */
////		if (end - p < 4)
////			goto dodgy_cert;
////		if (p[0] != 0x30 &&
////		    p[1] != 0x82)
////			goto dodgy_cert;
////		plen = (p[2] << 8) | p[3];
////		plen += 4;
////		if (plen > end - p)
////			goto dodgy_cert;
////
////		key = key_create_or_update(make_key_ref(builtin_trusted_keys, 1),
////					   "asymmetric",
////					   NULL,
////					   p,
////					   plen,
////					   ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
////					   KEY_USR_VIEW | KEY_USR_READ),
////					   KEY_ALLOC_NOT_IN_QUOTA |
////					   KEY_ALLOC_BUILT_IN |
////					   KEY_ALLOC_BYPASS_RESTRICTION);
////		if (IS_ERR(key)) {
////			pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
////			       PTR_ERR(key));
////		} else {
////			pr_notice("Loaded X.509 cert '%s'\n",
////				  key_ref_to_ptr(key)->description);
////			key_ref_put(key);
////		}
////		p += plen;
////	}
////
////	return 0;
////
////dodgy_cert:
////	pr_err("Problem parsing in-kernel X.509 certificate list\n");
////	return 0;
////}
////late_initcall(load_system_certificate_list);
//
//
//
//#ifdef CONFIG_SYSTEM_DATA_VERIFICATION
//
///**
// * verify_pkcs7_signature - Verify a PKCS#7-based signature on system data.
// * @data: The data to be verified (NULL if expecting internal data).
// * @len: Size of @data.
// * @raw_pkcs7: The PKCS#7 message that is the signature.
// * @pkcs7_len: The size of @raw_pkcs7.
// * @trusted_keys: Trusted keys to use (NULL for builtin trusted keys only,
// *					(void *)1UL for all trusted keys).
// * @usage: The use to which the key is being put.
// * @view_content: Callback to gain access to content.
// * @ctx: Context for callback.
// */
//int verify_pkcs7_signature(const void *data, size_t len,
//			   const void *raw_pkcs7, size_t pkcs7_len,
//			   struct key *trusted_keys,
//			   enum key_being_used_for usage,
//			   int (*view_content)(void *ctx,
//					       const void *data, size_t len,
//					       size_t asn1hdrlen),
//			   void *ctx)
//{
//	struct pkcs7_message *pkcs7;
//	int ret;
//
//	pkcs7 = pkcs7_parse_message(raw_pkcs7, pkcs7_len);
//	if (IS_ERR(pkcs7))
//		return PTR_ERR(pkcs7);
//
//	/* The data should be detached - so we need to supply it. */
//	if (data && pkcs7_supply_detached_data(pkcs7, data, len) < 0) {
//		pr_err("PKCS#7 signature with non-detached data\n");
//		ret = -EBADMSG;
//		goto error;
//	}
//
//	ret = pkcs7_verify(pkcs7, usage);
//	if (ret < 0)
//		goto error;
//
//	if (!trusted_keys) {
//		trusted_keys = builtin_trusted_keys;
//	} else if (trusted_keys == VERIFY_USE_SECONDARY_KEYRING) {
//#ifdef CONFIG_SECONDARY_TRUSTED_KEYRING
//		trusted_keys = secondary_trusted_keys;
//#else
//		trusted_keys = builtin_trusted_keys;
//#endif
//	} else if (trusted_keys == VERIFY_USE_PLATFORM_KEYRING) {
//#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
//		trusted_keys = platform_trusted_keys;
//#else
//		trusted_keys = NULL;
//#endif
//		if (!trusted_keys) {
//			ret = -ENOKEY;
//			pr_devel("PKCS#7 platform keyring is not available\n");
//			goto error;
//		}
//	}
//	ret = pkcs7_validate_trust(pkcs7, trusted_keys);
//	if (ret < 0) {
//		if (ret == -ENOKEY)
//			pr_devel("PKCS#7 signature not signed with a trusted key\n");
//		goto error;
//	}
//
//	if (view_content) {
//		size_t asn1hdrlen;
//
//		ret = pkcs7_get_content_data(pkcs7, &data, &len, &asn1hdrlen);
//		if (ret < 0) {
//			if (ret == -ENODATA)
//				pr_devel("PKCS#7 message does not contain data\n");
//			goto error;
//		}
//
//		ret = view_content(ctx, data, len, asn1hdrlen);
//	}
//
//error:
//	pkcs7_free_message(pkcs7);
//	pr_devel("<==%s() = %d\n", __func__, ret);
//	return ret;
//}
//
//
////EXPORT_SYMBOL_GPL(verify_pkcs7_signature);
//
//#endif /* CONFIG_SYSTEM_DATA_VERIFICATION */
//
////#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
////void __init set_platform_trusted_keys(struct key *keyring)
////{
////	platform_trusted_keys = keyring;
////}
////#endif