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