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 struct linux_binprm;
15
16 #ifdef CONFIG_IMA
17 extern int ima_bprm_check(struct linux_binprm *bprm);
18 extern int ima_file_check(struct file *file, int mask);
19 extern void ima_post_create_tmpfile(struct inode *inode);
20 extern void ima_file_free(struct file *file);
21 extern int ima_file_mmap(struct file *file, unsigned long prot);
22 extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
23 extern int ima_load_data(enum kernel_load_data_id id, bool contents);
24 extern int ima_post_load_data(char *buf, loff_t size,
25 enum kernel_load_data_id id, char *description);
26 extern int ima_read_file(struct file *file, enum kernel_read_file_id id,
27 bool contents);
28 extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
29 enum kernel_read_file_id id);
30 extern void ima_post_path_mknod(struct dentry *dentry);
31 extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
32 extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
33
34 #ifdef CONFIG_IMA_KEXEC
35 extern void ima_add_kexec_buffer(struct kimage *image);
36 #endif
37
38 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
39 extern bool arch_ima_get_secureboot(void);
40 extern const char * const *arch_get_ima_policy(void);
41 #else
arch_ima_get_secureboot(void)42 static inline bool arch_ima_get_secureboot(void)
43 {
44 return false;
45 }
46
arch_get_ima_policy(void)47 static inline const char * const *arch_get_ima_policy(void)
48 {
49 return NULL;
50 }
51 #endif
52
53 #else
ima_bprm_check(struct linux_binprm * bprm)54 static inline int ima_bprm_check(struct linux_binprm *bprm)
55 {
56 return 0;
57 }
58
ima_file_check(struct file * file,int mask)59 static inline int ima_file_check(struct file *file, int mask)
60 {
61 return 0;
62 }
63
ima_post_create_tmpfile(struct inode * inode)64 static inline void ima_post_create_tmpfile(struct inode *inode)
65 {
66 }
67
ima_file_free(struct file * file)68 static inline void ima_file_free(struct file *file)
69 {
70 return;
71 }
72
ima_file_mmap(struct file * file,unsigned long prot)73 static inline int ima_file_mmap(struct file *file, unsigned long prot)
74 {
75 return 0;
76 }
77
ima_file_mprotect(struct vm_area_struct * vma,unsigned long prot)78 static inline int ima_file_mprotect(struct vm_area_struct *vma,
79 unsigned long prot)
80 {
81 return 0;
82 }
83
ima_load_data(enum kernel_load_data_id id,bool contents)84 static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
85 {
86 return 0;
87 }
88
ima_post_load_data(char * buf,loff_t size,enum kernel_load_data_id id,char * description)89 static inline int ima_post_load_data(char *buf, loff_t size,
90 enum kernel_load_data_id id,
91 char *description)
92 {
93 return 0;
94 }
95
ima_read_file(struct file * file,enum kernel_read_file_id id,bool contents)96 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
97 bool contents)
98 {
99 return 0;
100 }
101
ima_post_read_file(struct file * file,void * buf,loff_t size,enum kernel_read_file_id id)102 static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
103 enum kernel_read_file_id id)
104 {
105 return 0;
106 }
107
ima_post_path_mknod(struct dentry * dentry)108 static inline void ima_post_path_mknod(struct dentry *dentry)
109 {
110 return;
111 }
112
ima_file_hash(struct file * file,char * buf,size_t buf_size)113 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
114 {
115 return -EOPNOTSUPP;
116 }
117
ima_kexec_cmdline(int kernel_fd,const void * buf,int size)118 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
119 #endif /* CONFIG_IMA */
120
121 #ifndef CONFIG_IMA_KEXEC
122 struct kimage;
123
ima_add_kexec_buffer(struct kimage * image)124 static inline void ima_add_kexec_buffer(struct kimage *image)
125 {}
126 #endif
127
128 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
129 extern void ima_post_key_create_or_update(struct key *keyring,
130 struct key *key,
131 const void *payload, size_t plen,
132 unsigned long flags, bool create);
133 #else
ima_post_key_create_or_update(struct key * keyring,struct key * key,const void * payload,size_t plen,unsigned long flags,bool create)134 static inline void ima_post_key_create_or_update(struct key *keyring,
135 struct key *key,
136 const void *payload,
137 size_t plen,
138 unsigned long flags,
139 bool create) {}
140 #endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
141
142 #ifdef CONFIG_IMA_APPRAISE
143 extern bool is_ima_appraise_enabled(void);
144 extern void ima_inode_post_setattr(struct dentry *dentry);
145 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
146 const void *xattr_value, size_t xattr_value_len);
147 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
148 #else
is_ima_appraise_enabled(void)149 static inline bool is_ima_appraise_enabled(void)
150 {
151 return 0;
152 }
153
ima_inode_post_setattr(struct dentry * dentry)154 static inline void ima_inode_post_setattr(struct dentry *dentry)
155 {
156 return;
157 }
158
ima_inode_setxattr(struct dentry * dentry,const char * xattr_name,const void * xattr_value,size_t xattr_value_len)159 static inline int ima_inode_setxattr(struct dentry *dentry,
160 const char *xattr_name,
161 const void *xattr_value,
162 size_t xattr_value_len)
163 {
164 return 0;
165 }
166
ima_inode_removexattr(struct dentry * dentry,const char * xattr_name)167 static inline int ima_inode_removexattr(struct dentry *dentry,
168 const char *xattr_name)
169 {
170 return 0;
171 }
172 #endif /* CONFIG_IMA_APPRAISE */
173
174 #if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
175 extern bool ima_appraise_signature(enum kernel_read_file_id func);
176 #else
ima_appraise_signature(enum kernel_read_file_id func)177 static inline bool ima_appraise_signature(enum kernel_read_file_id func)
178 {
179 return false;
180 }
181 #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
182 #endif /* _LINUX_IMA_H */
183
