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 mnt_idmap *idmap,
22 struct inode *inode);
23 extern void ima_file_free(struct file *file);
24 extern int ima_file_mmap(struct file *file, unsigned long reqprot,
25 unsigned long prot, unsigned long flags);
26 extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
27 extern int ima_load_data(enum kernel_load_data_id id, bool contents);
28 extern int ima_post_load_data(char *buf, loff_t size,
29 enum kernel_load_data_id id, char *description);
30 extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
31 bool contents);
32 extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
33 enum kernel_read_file_id id);
34 extern void ima_post_path_mknod(struct mnt_idmap *idmap,
35 struct dentry *dentry);
36 extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
37 extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
38 extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
39 extern 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
45 extern void ima_appraise_parse_cmdline(void);
46 #else
ima_appraise_parse_cmdline(void)47 static inline void ima_appraise_parse_cmdline(void) {}
48 #endif
49
50 #ifdef CONFIG_IMA_KEXEC
51 extern void ima_add_kexec_buffer(struct kimage *image);
52 #endif
53
54 #else
ima_get_current_hash_algo(void)55 static inline enum hash_algo ima_get_current_hash_algo(void)
56 {
57 return HASH_ALGO__LAST;
58 }
59
ima_bprm_check(struct linux_binprm * bprm)60 static inline int ima_bprm_check(struct linux_binprm *bprm)
61 {
62 return 0;
63 }
64
ima_file_check(struct file * file,int mask)65 static inline int ima_file_check(struct file *file, int mask)
66 {
67 return 0;
68 }
69
ima_post_create_tmpfile(struct mnt_idmap * idmap,struct inode * inode)70 static inline void ima_post_create_tmpfile(struct mnt_idmap *idmap,
71 struct inode *inode)
72 {
73 }
74
ima_file_free(struct file * file)75 static inline void ima_file_free(struct file *file)
76 {
77 return;
78 }
79
ima_file_mmap(struct file * file,unsigned long reqprot,unsigned long prot,unsigned long flags)80 static inline int ima_file_mmap(struct file *file, unsigned long reqprot,
81 unsigned long prot, unsigned long flags)
82 {
83 return 0;
84 }
85
ima_file_mprotect(struct vm_area_struct * vma,unsigned long prot)86 static inline int ima_file_mprotect(struct vm_area_struct *vma,
87 unsigned long prot)
88 {
89 return 0;
90 }
91
ima_load_data(enum kernel_load_data_id id,bool contents)92 static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
93 {
94 return 0;
95 }
96
ima_post_load_data(char * buf,loff_t size,enum kernel_load_data_id id,char * description)97 static 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
ima_read_file(struct file * file,enum kernel_read_file_id id,bool contents)104 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
105 bool contents)
106 {
107 return 0;
108 }
109
ima_post_read_file(struct file * file,void * buf,loff_t size,enum kernel_read_file_id id)110 static 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
ima_post_path_mknod(struct mnt_idmap * idmap,struct dentry * dentry)116 static inline void ima_post_path_mknod(struct mnt_idmap *idmap,
117 struct dentry *dentry)
118 {
119 return;
120 }
121
ima_file_hash(struct file * file,char * buf,size_t buf_size)122 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
123 {
124 return -EOPNOTSUPP;
125 }
126
ima_inode_hash(struct inode * inode,char * buf,size_t buf_size)127 static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
128 {
129 return -EOPNOTSUPP;
130 }
131
ima_kexec_cmdline(int kernel_fd,const void * buf,int size)132 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
133
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)134 static 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
146 int __init ima_free_kexec_buffer(void);
147 int __init ima_get_kexec_buffer(void **addr, size_t *size);
148 #endif
149
150 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
151 extern bool arch_ima_get_secureboot(void);
152 extern const char * const *arch_get_ima_policy(void);
153 #else
arch_ima_get_secureboot(void)154 static inline bool arch_ima_get_secureboot(void)
155 {
156 return false;
157 }
158
arch_get_ima_policy(void)159 static inline const char * const *arch_get_ima_policy(void)
160 {
161 return NULL;
162 }
163 #endif
164
165 #ifndef CONFIG_IMA_KEXEC
166 struct kimage;
167
ima_add_kexec_buffer(struct kimage * image)168 static inline void ima_add_kexec_buffer(struct kimage *image)
169 {}
170 #endif
171
172 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
173 extern 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
ima_post_key_create_or_update(struct key * keyring,struct key * key,const void * payload,size_t plen,unsigned long flags,bool create)178 static 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
187 extern bool is_ima_appraise_enabled(void);
188 extern void ima_inode_post_setattr(struct mnt_idmap *idmap,
189 struct dentry *dentry);
190 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
191 const void *xattr_value, size_t xattr_value_len);
192 extern int ima_inode_set_acl(struct mnt_idmap *idmap,
193 struct dentry *dentry, const char *acl_name,
194 struct posix_acl *kacl);
ima_inode_remove_acl(struct mnt_idmap * idmap,struct dentry * dentry,const char * acl_name)195 static 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 }
201 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
202 #else
is_ima_appraise_enabled(void)203 static inline bool is_ima_appraise_enabled(void)
204 {
205 return 0;
206 }
207
ima_inode_post_setattr(struct mnt_idmap * idmap,struct dentry * dentry)208 static inline void ima_inode_post_setattr(struct mnt_idmap *idmap,
209 struct dentry *dentry)
210 {
211 return;
212 }
213
ima_inode_setxattr(struct dentry * dentry,const char * xattr_name,const void * xattr_value,size_t xattr_value_len)214 static 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
ima_inode_set_acl(struct mnt_idmap * idmap,struct dentry * dentry,const char * acl_name,struct posix_acl * kacl)222 static 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
ima_inode_removexattr(struct dentry * dentry,const char * xattr_name)230 static inline int ima_inode_removexattr(struct dentry *dentry,
231 const char *xattr_name)
232 {
233 return 0;
234 }
235
ima_inode_remove_acl(struct mnt_idmap * idmap,struct dentry * dentry,const char * acl_name)236 static 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)
245 extern bool ima_appraise_signature(enum kernel_read_file_id func);
246 #else
ima_appraise_signature(enum kernel_read_file_id func)247 static 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 */
253