Linux kernel mirror (for testing)
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2008 IBM Corporation
4 * Author: Mimi Zohar <zohar@us.ibm.com>
5 */
6
7#ifndef _LINUX_IMA_H
8#define _LINUX_IMA_H
9
10#include <linux/kernel_read_file.h>
11#include <linux/fs.h>
12#include <linux/security.h>
13#include <linux/kexec.h>
14#include <crypto/hash_info.h>
15struct linux_binprm;
16
17#ifdef CONFIG_IMA
18extern enum hash_algo ima_get_current_hash_algo(void);
19extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
20extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
21extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
22extern int ima_measure_critical_data(const char *event_label,
23 const char *event_name,
24 const void *buf, size_t buf_len,
25 bool hash, u8 *digest, size_t digest_len);
26
27#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
28extern void ima_appraise_parse_cmdline(void);
29#else
30static inline void ima_appraise_parse_cmdline(void) {}
31#endif
32
33#ifdef CONFIG_IMA_KEXEC
34extern void ima_add_kexec_buffer(struct kimage *image);
35extern void ima_kexec_post_load(struct kimage *image);
36#else
37static inline void ima_kexec_post_load(struct kimage *image) {}
38#endif
39
40#else
41static inline enum hash_algo ima_get_current_hash_algo(void)
42{
43 return HASH_ALGO__LAST;
44}
45
46static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
47{
48 return -EOPNOTSUPP;
49}
50
51static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
52{
53 return -EOPNOTSUPP;
54}
55
56static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
57
58static inline int ima_measure_critical_data(const char *event_label,
59 const char *event_name,
60 const void *buf, size_t buf_len,
61 bool hash, u8 *digest,
62 size_t digest_len)
63{
64 return -ENOENT;
65}
66
67#endif /* CONFIG_IMA */
68
69#ifdef CONFIG_HAVE_IMA_KEXEC
70int __init ima_free_kexec_buffer(void);
71int __init ima_get_kexec_buffer(void **addr, size_t *size);
72#endif
73
74#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
75extern bool arch_ima_get_secureboot(void);
76extern const char * const *arch_get_ima_policy(void);
77#else
78static inline bool arch_ima_get_secureboot(void)
79{
80 return false;
81}
82
83static inline const char * const *arch_get_ima_policy(void)
84{
85 return NULL;
86}
87#endif
88
89#ifndef CONFIG_IMA_KEXEC
90struct kimage;
91
92static inline void ima_add_kexec_buffer(struct kimage *image)
93{}
94#endif
95
96#ifdef CONFIG_IMA_APPRAISE
97extern bool is_ima_appraise_enabled(void);
98#else
99static inline bool is_ima_appraise_enabled(void)
100{
101 return 0;
102}
103#endif /* CONFIG_IMA_APPRAISE */
104
105#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
106extern bool ima_appraise_signature(enum kernel_read_file_id func);
107#else
108static inline bool ima_appraise_signature(enum kernel_read_file_id func)
109{
110 return false;
111}
112#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
113#endif /* _LINUX_IMA_H */