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