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