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>
14struct linux_binprm;
15
16#ifdef CONFIG_IMA
17extern int ima_bprm_check(struct linux_binprm *bprm);
18extern int ima_file_check(struct file *file, int mask);
19extern void ima_post_create_tmpfile(struct user_namespace *mnt_userns,
20 struct inode *inode);
21extern void ima_file_free(struct file *file);
22extern int ima_file_mmap(struct file *file, unsigned long prot);
23extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
24extern int ima_load_data(enum kernel_load_data_id id, bool contents);
25extern int ima_post_load_data(char *buf, loff_t size,
26 enum kernel_load_data_id id, char *description);
27extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
28 bool contents);
29extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
30 enum kernel_read_file_id id);
31extern void ima_post_path_mknod(struct user_namespace *mnt_userns,
32 struct dentry *dentry);
33extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
34extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
35extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
36extern void ima_measure_critical_data(const char *event_label,
37 const char *event_name,
38 const void *buf, size_t buf_len,
39 bool hash);
40
41#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
42extern void ima_appraise_parse_cmdline(void);
43#else
44static inline void ima_appraise_parse_cmdline(void) {}
45#endif
46
47#ifdef CONFIG_IMA_KEXEC
48extern void ima_add_kexec_buffer(struct kimage *image);
49#endif
50
51#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
52extern bool arch_ima_get_secureboot(void);
53extern const char * const *arch_get_ima_policy(void);
54#else
55static inline bool arch_ima_get_secureboot(void)
56{
57 return false;
58}
59
60static inline const char * const *arch_get_ima_policy(void)
61{
62 return NULL;
63}
64#endif
65
66#else
67static inline int ima_bprm_check(struct linux_binprm *bprm)
68{
69 return 0;
70}
71
72static inline int ima_file_check(struct file *file, int mask)
73{
74 return 0;
75}
76
77static inline void ima_post_create_tmpfile(struct user_namespace *mnt_userns,
78 struct inode *inode)
79{
80}
81
82static inline void ima_file_free(struct file *file)
83{
84 return;
85}
86
87static inline int ima_file_mmap(struct file *file, unsigned long prot)
88{
89 return 0;
90}
91
92static inline int ima_file_mprotect(struct vm_area_struct *vma,
93 unsigned long prot)
94{
95 return 0;
96}
97
98static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
99{
100 return 0;
101}
102
103static inline int ima_post_load_data(char *buf, loff_t size,
104 enum kernel_load_data_id id,
105 char *description)
106{
107 return 0;
108}
109
110static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
111 bool contents)
112{
113 return 0;
114}
115
116static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
117 enum kernel_read_file_id id)
118{
119 return 0;
120}
121
122static inline void ima_post_path_mknod(struct user_namespace *mnt_userns,
123 struct dentry *dentry)
124{
125 return;
126}
127
128static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
129{
130 return -EOPNOTSUPP;
131}
132
133static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
134{
135 return -EOPNOTSUPP;
136}
137
138static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
139
140static inline void ima_measure_critical_data(const char *event_label,
141 const char *event_name,
142 const void *buf, size_t buf_len,
143 bool hash) {}
144
145#endif /* CONFIG_IMA */
146
147#ifndef CONFIG_IMA_KEXEC
148struct kimage;
149
150static inline void ima_add_kexec_buffer(struct kimage *image)
151{}
152#endif
153
154#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
155extern void ima_post_key_create_or_update(struct key *keyring,
156 struct key *key,
157 const void *payload, size_t plen,
158 unsigned long flags, bool create);
159#else
160static inline void ima_post_key_create_or_update(struct key *keyring,
161 struct key *key,
162 const void *payload,
163 size_t plen,
164 unsigned long flags,
165 bool create) {}
166#endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
167
168#ifdef CONFIG_IMA_APPRAISE
169extern bool is_ima_appraise_enabled(void);
170extern void ima_inode_post_setattr(struct user_namespace *mnt_userns,
171 struct dentry *dentry);
172extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
173 const void *xattr_value, size_t xattr_value_len);
174extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
175#else
176static inline bool is_ima_appraise_enabled(void)
177{
178 return 0;
179}
180
181static inline void ima_inode_post_setattr(struct user_namespace *mnt_userns,
182 struct dentry *dentry)
183{
184 return;
185}
186
187static inline int ima_inode_setxattr(struct dentry *dentry,
188 const char *xattr_name,
189 const void *xattr_value,
190 size_t xattr_value_len)
191{
192 return 0;
193}
194
195static inline int ima_inode_removexattr(struct dentry *dentry,
196 const char *xattr_name)
197{
198 return 0;
199}
200#endif /* CONFIG_IMA_APPRAISE */
201
202#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
203extern bool ima_appraise_signature(enum kernel_read_file_id func);
204#else
205static inline bool ima_appraise_signature(enum kernel_read_file_id func)
206{
207 return false;
208}
209#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
210#endif /* _LINUX_IMA_H */