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