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_file_hash(struct file *file, char *buf, size_t buf_size);
20 extern int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size);
21 extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
22 extern int ima_measure_critical_data(const char *event_label,
23 const char *event_name,
24 const void *buf, size_t buf_len,
25 bool hash, u8 *digest, size_t digest_len);
26
27 #ifdef CONFIG_IMA_APPRAISE_BOOTPARAM
28 extern void ima_appraise_parse_cmdline(void);
29 #else
ima_appraise_parse_cmdline(void)30 static inline void ima_appraise_parse_cmdline(void) {}
31 #endif
32
33 #ifdef CONFIG_IMA_KEXEC
34 extern void ima_add_kexec_buffer(struct kimage *image);
35 #endif
36
37 #else
ima_get_current_hash_algo(void)38 static inline enum hash_algo ima_get_current_hash_algo(void)
39 {
40 return HASH_ALGO__LAST;
41 }
42
ima_file_hash(struct file * file,char * buf,size_t buf_size)43 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
44 {
45 return -EOPNOTSUPP;
46 }
47
ima_inode_hash(struct inode * inode,char * buf,size_t buf_size)48 static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
49 {
50 return -EOPNOTSUPP;
51 }
52
ima_kexec_cmdline(int kernel_fd,const void * buf,int size)53 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
54
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)55 static inline int ima_measure_critical_data(const char *event_label,
56 const char *event_name,
57 const void *buf, size_t buf_len,
58 bool hash, u8 *digest,
59 size_t digest_len)
60 {
61 return -ENOENT;
62 }
63
64 #endif /* CONFIG_IMA */
65
66 #ifdef CONFIG_HAVE_IMA_KEXEC
67 int __init ima_free_kexec_buffer(void);
68 int __init ima_get_kexec_buffer(void **addr, size_t *size);
69 #endif
70
71 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
72 extern bool arch_ima_get_secureboot(void);
73 extern const char * const *arch_get_ima_policy(void);
74 #else
arch_ima_get_secureboot(void)75 static inline bool arch_ima_get_secureboot(void)
76 {
77 return false;
78 }
79
arch_get_ima_policy(void)80 static inline const char * const *arch_get_ima_policy(void)
81 {
82 return NULL;
83 }
84 #endif
85
86 #ifndef CONFIG_IMA_KEXEC
87 struct kimage;
88
ima_add_kexec_buffer(struct kimage * image)89 static inline void ima_add_kexec_buffer(struct kimage *image)
90 {}
91 #endif
92
93 #ifdef CONFIG_IMA_APPRAISE
94 extern bool is_ima_appraise_enabled(void);
95 #else
is_ima_appraise_enabled(void)96 static inline bool is_ima_appraise_enabled(void)
97 {
98 return 0;
99 }
100 #endif /* CONFIG_IMA_APPRAISE */
101
102 #if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
103 extern bool ima_appraise_signature(enum kernel_read_file_id func);
104 #else
ima_appraise_signature(enum kernel_read_file_id func)105 static inline bool ima_appraise_signature(enum kernel_read_file_id func)
106 {
107 return false;
108 }
109 #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
110 #endif /* _LINUX_IMA_H */
111