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>
15 struct linux_binprm;
16
17 #ifdef CONFIG_IMA
18 extern enum hash_algo ima_get_current_hash_algo(void);
19 extern int ima_bprm_check(struct linux_binprm *bprm);
20 extern int ima_file_check(struct file *file, int mask);
21 extern void ima_post_create_tmpfile(struct user_namespace *mnt_userns,
22 struct inode *inode);
23 extern void ima_file_free(struct file *file);
24 extern int ima_file_mmap(struct file *file, unsigned long prot);
25 extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
26 extern int ima_load_data(enum kernel_load_data_id id, bool contents);
27 extern int ima_post_load_data(char *buf, loff_t size,
28 enum kernel_load_data_id id, char *description);
29 extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
30 bool contents);
31 extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
32 enum kernel_read_file_id id);
33 extern void ima_post_path_mknod(struct user_namespace *mnt_userns,
34 struct dentry *dentry);
35 extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
36 extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
37 extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
38 extern 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
44 extern void ima_appraise_parse_cmdline(void);
45 #else
ima_appraise_parse_cmdline(void)46 static inline void ima_appraise_parse_cmdline(void) {}
47 #endif
48
49 #ifdef CONFIG_IMA_KEXEC
50 extern void ima_add_kexec_buffer(struct kimage *image);
51 #endif
52
53 #else
ima_get_current_hash_algo(void)54 static inline enum hash_algo ima_get_current_hash_algo(void)
55 {
56 return HASH_ALGO__LAST;
57 }
58
ima_bprm_check(struct linux_binprm * bprm)59 static inline int ima_bprm_check(struct linux_binprm *bprm)
60 {
61 return 0;
62 }
63
ima_file_check(struct file * file,int mask)64 static inline int ima_file_check(struct file *file, int mask)
65 {
66 return 0;
67 }
68
ima_post_create_tmpfile(struct user_namespace * mnt_userns,struct inode * inode)69 static inline void ima_post_create_tmpfile(struct user_namespace *mnt_userns,
70 struct inode *inode)
71 {
72 }
73
ima_file_free(struct file * file)74 static inline void ima_file_free(struct file *file)
75 {
76 return;
77 }
78
ima_file_mmap(struct file * file,unsigned long prot)79 static inline int ima_file_mmap(struct file *file, unsigned long prot)
80 {
81 return 0;
82 }
83
ima_file_mprotect(struct vm_area_struct * vma,unsigned long prot)84 static inline int ima_file_mprotect(struct vm_area_struct *vma,
85 unsigned long prot)
86 {
87 return 0;
88 }
89
ima_load_data(enum kernel_load_data_id id,bool contents)90 static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
91 {
92 return 0;
93 }
94
ima_post_load_data(char * buf,loff_t size,enum kernel_load_data_id id,char * description)95 static 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
ima_read_file(struct file * file,enum kernel_read_file_id id,bool contents)102 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
103 bool contents)
104 {
105 return 0;
106 }
107
ima_post_read_file(struct file * file,void * buf,loff_t size,enum kernel_read_file_id id)108 static 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
ima_post_path_mknod(struct user_namespace * mnt_userns,struct dentry * dentry)114 static inline void ima_post_path_mknod(struct user_namespace *mnt_userns,
115 struct dentry *dentry)
116 {
117 return;
118 }
119
ima_file_hash(struct file * file,char * buf,size_t buf_size)120 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
121 {
122 return -EOPNOTSUPP;
123 }
124
ima_inode_hash(struct inode * inode,char * buf,size_t buf_size)125 static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
126 {
127 return -EOPNOTSUPP;
128 }
129
ima_kexec_cmdline(int kernel_fd,const void * buf,int size)130 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
131
ima_measure_critical_data(const char * event_label,const char * event_name,const void * buf,size_t buf_len,bool hash,u8 * digest,size_t digest_len)132 static 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
144 int __init ima_free_kexec_buffer(void);
145 int __init ima_get_kexec_buffer(void **addr, size_t *size);
146 #endif
147
148 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
149 extern bool arch_ima_get_secureboot(void);
150 extern const char * const *arch_get_ima_policy(void);
151 #else
arch_ima_get_secureboot(void)152 static inline bool arch_ima_get_secureboot(void)
153 {
154 return false;
155 }
156
arch_get_ima_policy(void)157 static inline const char * const *arch_get_ima_policy(void)
158 {
159 return NULL;
160 }
161 #endif
162
163 #ifndef CONFIG_IMA_KEXEC
164 struct kimage;
165
ima_add_kexec_buffer(struct kimage * image)166 static inline void ima_add_kexec_buffer(struct kimage *image)
167 {}
168 #endif
169
170 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
171 extern 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
ima_post_key_create_or_update(struct key * keyring,struct key * key,const void * payload,size_t plen,unsigned long flags,bool create)176 static 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
185 extern bool is_ima_appraise_enabled(void);
186 extern void ima_inode_post_setattr(struct user_namespace *mnt_userns,
187 struct dentry *dentry);
188 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
189 const void *xattr_value, size_t xattr_value_len);
190 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
191 #else
is_ima_appraise_enabled(void)192 static inline bool is_ima_appraise_enabled(void)
193 {
194 return 0;
195 }
196
ima_inode_post_setattr(struct user_namespace * mnt_userns,struct dentry * dentry)197 static inline void ima_inode_post_setattr(struct user_namespace *mnt_userns,
198 struct dentry *dentry)
199 {
200 return;
201 }
202
ima_inode_setxattr(struct dentry * dentry,const char * xattr_name,const void * xattr_value,size_t xattr_value_len)203 static 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
ima_inode_removexattr(struct dentry * dentry,const char * xattr_name)211 static 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)
219 extern bool ima_appraise_signature(enum kernel_read_file_id func);
220 #else
ima_appraise_signature(enum kernel_read_file_id func)221 static 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 */
227