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_bprm_check(struct linux_binprm *bprm);
20extern int ima_file_check(struct file *file, int mask);
21extern void ima_post_create_tmpfile(struct mnt_idmap *idmap,
22 struct inode *inode);
23extern void ima_file_free(struct file *file);
24extern int ima_file_mmap(struct file *file, unsigned long reqprot,
25 unsigned long prot, unsigned long flags);
26extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
27extern int ima_load_data(enum kernel_load_data_id id, bool contents);
28extern int ima_post_load_data(char *buf, loff_t size,
29 enum kernel_load_data_id id, char *description);
30extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
31 bool contents);
32extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
33 enum kernel_read_file_id id);
34extern void ima_post_path_mknod(struct mnt_idmap *idmap,
35 struct dentry *dentry);
36extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
37extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
38extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
39extern int ima_measure_critical_data(const char *event_label,
40 const char *event_name,
41 const void *buf, size_t buf_len,
42 bool hash, u8 *digest, size_t digest_len);
43
44#ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
45extern void ima_appraise_parse_cmdline(void);
46#else
47static inline void ima_appraise_parse_cmdline(void) {}
48#endif
49
50#ifdef CONFIG_IMA_KEXEC
51extern void ima_add_kexec_buffer(struct kimage *image);
52#endif
53
54#else
55static inline enum hash_algo ima_get_current_hash_algo(void)
56{
57 return HASH_ALGO__LAST;
58}
59
60static inline int ima_bprm_check(struct linux_binprm *bprm)
61{
62 return 0;
63}
64
65static inline int ima_file_check(struct file *file, int mask)
66{
67 return 0;
68}
69
70static inline void ima_post_create_tmpfile(struct mnt_idmap *idmap,
71 struct inode *inode)
72{
73}
74
75static inline void ima_file_free(struct file *file)
76{
77 return;
78}
79
80static inline int ima_file_mmap(struct file *file, unsigned long reqprot,
81 unsigned long prot, unsigned long flags)
82{
83 return 0;
84}
85
86static inline int ima_file_mprotect(struct vm_area_struct *vma,
87 unsigned long prot)
88{
89 return 0;
90}
91
92static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
93{
94 return 0;
95}
96
97static inline int ima_post_load_data(char *buf, loff_t size,
98 enum kernel_load_data_id id,
99 char *description)
100{
101 return 0;
102}
103
104static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
105 bool contents)
106{
107 return 0;
108}
109
110static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
111 enum kernel_read_file_id id)
112{
113 return 0;
114}
115
116static inline void ima_post_path_mknod(struct mnt_idmap *idmap,
117 struct dentry *dentry)
118{
119 return;
120}
121
122static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
123{
124 return -EOPNOTSUPP;
125}
126
127static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
128{
129 return -EOPNOTSUPP;
130}
131
132static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
133
134static inline int ima_measure_critical_data(const char *event_label,
135 const char *event_name,
136 const void *buf, size_t buf_len,
137 bool hash, u8 *digest,
138 size_t digest_len)
139{
140 return -ENOENT;
141}
142
143#endif /* CONFIG_IMA */
144
145#ifdef CONFIG_HAVE_IMA_KEXEC
146int __init ima_free_kexec_buffer(void);
147int __init ima_get_kexec_buffer(void **addr, size_t *size);
148#endif
149
150#ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
151extern bool arch_ima_get_secureboot(void);
152extern const char * const *arch_get_ima_policy(void);
153#else
154static inline bool arch_ima_get_secureboot(void)
155{
156 return false;
157}
158
159static inline const char * const *arch_get_ima_policy(void)
160{
161 return NULL;
162}
163#endif
164
165#ifndef CONFIG_IMA_KEXEC
166struct kimage;
167
168static inline void ima_add_kexec_buffer(struct kimage *image)
169{}
170#endif
171
172#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
173extern void ima_post_key_create_or_update(struct key *keyring,
174 struct key *key,
175 const void *payload, size_t plen,
176 unsigned long flags, bool create);
177#else
178static inline void ima_post_key_create_or_update(struct key *keyring,
179 struct key *key,
180 const void *payload,
181 size_t plen,
182 unsigned long flags,
183 bool create) {}
184#endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
185
186#ifdef CONFIG_IMA_APPRAISE
187extern bool is_ima_appraise_enabled(void);
188extern void ima_inode_post_setattr(struct mnt_idmap *idmap,
189 struct dentry *dentry);
190extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
191 const void *xattr_value, size_t xattr_value_len);
192extern int ima_inode_set_acl(struct mnt_idmap *idmap,
193 struct dentry *dentry, const char *acl_name,
194 struct posix_acl *kacl);
195static inline int ima_inode_remove_acl(struct mnt_idmap *idmap,
196 struct dentry *dentry,
197 const char *acl_name)
198{
199 return ima_inode_set_acl(idmap, dentry, acl_name, NULL);
200}
201extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
202#else
203static inline bool is_ima_appraise_enabled(void)
204{
205 return 0;
206}
207
208static inline void ima_inode_post_setattr(struct mnt_idmap *idmap,
209 struct dentry *dentry)
210{
211 return;
212}
213
214static inline int ima_inode_setxattr(struct dentry *dentry,
215 const char *xattr_name,
216 const void *xattr_value,
217 size_t xattr_value_len)
218{
219 return 0;
220}
221
222static inline int ima_inode_set_acl(struct mnt_idmap *idmap,
223 struct dentry *dentry, const char *acl_name,
224 struct posix_acl *kacl)
225{
226
227 return 0;
228}
229
230static inline int ima_inode_removexattr(struct dentry *dentry,
231 const char *xattr_name)
232{
233 return 0;
234}
235
236static inline int ima_inode_remove_acl(struct mnt_idmap *idmap,
237 struct dentry *dentry,
238 const char *acl_name)
239{
240 return 0;
241}
242#endif /* CONFIG_IMA_APPRAISE */
243
244#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
245extern bool ima_appraise_signature(enum kernel_read_file_id func);
246#else
247static inline bool ima_appraise_signature(enum kernel_read_file_id func)
248{
249 return false;
250}
251#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
252#endif /* _LINUX_IMA_H */