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);
35#endif
36
37#else
38static inline enum hash_algo ima_get_current_hash_algo(void)
39{
40	return HASH_ALGO__LAST;
41}
42
43static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
44{
45	return -EOPNOTSUPP;
46}
47
48static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
49{
50	return -EOPNOTSUPP;
51}
52
53static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
54
55static inline int ima_measure_critical_data(const char *event_label,
56					     const char *event_name,
57					     const void *buf, size_t buf_len,
58					     bool hash, u8 *digest,
59					     size_t digest_len)
60{
61	return -ENOENT;
62}
63
64#endif /* CONFIG_IMA */
65
66#ifdef CONFIG_HAVE_IMA_KEXEC
67int __init ima_free_kexec_buffer(void);
68int __init ima_get_kexec_buffer(void **addr, size_t *size);
69#endif
70
71#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
72extern bool arch_ima_get_secureboot(void);
73extern const char * const *arch_get_ima_policy(void);
74#else
75static inline bool arch_ima_get_secureboot(void)
76{
77	return false;
78}
79
80static inline const char * const *arch_get_ima_policy(void)
81{
82	return NULL;
83}
84#endif
85
86#ifndef CONFIG_IMA_KEXEC
87struct kimage;
88
89static inline void ima_add_kexec_buffer(struct kimage *image)
90{}
91#endif
92
93#ifdef CONFIG_IMA_APPRAISE
94extern bool is_ima_appraise_enabled(void);
95#else
96static inline bool is_ima_appraise_enabled(void)
97{
98	return 0;
99}
100#endif /* CONFIG_IMA_APPRAISE */
101
102#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
103extern bool ima_appraise_signature(enum kernel_read_file_id func);
104#else
105static inline bool ima_appraise_signature(enum kernel_read_file_id func)
106{
107	return false;
108}
109#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
110#endif /* _LINUX_IMA_H */
111