include/linux/ima.h

   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/fs.h>
  11 #include <linux/security.h>
  12 #include <linux/kexec.h>
  13 struct linux_binprm;
  14
  15 #ifdef CONFIG_IMA
  16 extern int ima_bprm_check(struct linux_binprm *bprm);
  17 extern int ima_file_check(struct file *file, int mask);
  18 extern void ima_post_create_tmpfile(struct inode *inode);
  19 extern void ima_file_free(struct file *file);
  20 extern int ima_file_mmap(struct file *file, unsigned long prot);
  21 extern int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot);
  22 extern int ima_load_data(enum kernel_load_data_id id);
  23 extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
  24 extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
  25                               enum kernel_read_file_id id);
  26 extern void ima_post_path_mknod(struct dentry *dentry);
  27 extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
  28 extern void ima_kexec_cmdline(int kernel_fd, const void *buf, int size);
  29
  30 #ifdef CONFIG_IMA_KEXEC
  31 extern void ima_add_kexec_buffer(struct kimage *image);
  32 #endif
  33
  34 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
  35 extern bool arch_ima_get_secureboot(void);
  36 extern const char * const *arch_get_ima_policy(void);
  37 #else
  38 static inline bool arch_ima_get_secureboot(void)
  39 {
  40         return false;
  41 }
  42
  43 static inline const char * const *arch_get_ima_policy(void)
  44 {
  45         return NULL;
  46 }
  47 #endif
  48
  49 #else
  50 static inline int ima_bprm_check(struct linux_binprm *bprm)
  51 {
  52         return 0;
  53 }
  54
  55 static inline int ima_file_check(struct file *file, int mask)
  56 {
  57         return 0;
  58 }
  59
  60 static inline void ima_post_create_tmpfile(struct inode *inode)
  61 {
  62 }
  63
  64 static inline void ima_file_free(struct file *file)
  65 {
  66         return;
  67 }
  68
  69 static inline int ima_file_mmap(struct file *file, unsigned long prot)
  70 {
  71         return 0;
  72 }
  73
  74 static inline int ima_file_mprotect(struct vm_area_struct *vma,
  75                                     unsigned long prot)
  76 {
  77         return 0;
  78 }
  79
  80 static inline int ima_load_data(enum kernel_load_data_id id)
  81 {
  82         return 0;
  83 }
  84
  85 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id)
  86 {
  87         return 0;
  88 }
  89
  90 static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
  91                                      enum kernel_read_file_id id)
  92 {
  93         return 0;
  94 }
  95
  96 static inline void ima_post_path_mknod(struct dentry *dentry)
  97 {
  98         return;
  99 }
 100
 101 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
 102 {
 103         return -EOPNOTSUPP;
 104 }
 105
 106 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
 107 #endif /* CONFIG_IMA */
 108
 109 #ifndef CONFIG_IMA_KEXEC
 110 struct kimage;
 111
 112 static inline void ima_add_kexec_buffer(struct kimage *image)
 113 {}
 114 #endif
 115
 116 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
 117 extern void ima_post_key_create_or_update(struct key *keyring,
 118                                           struct key *key,
 119                                           const void *payload, size_t plen,
 120                                           unsigned long flags, bool create);
 121 #else
 122 static inline void ima_post_key_create_or_update(struct key *keyring,
 123                                                  struct key *key,
 124                                                  const void *payload,
 125                                                  size_t plen,
 126                                                  unsigned long flags,
 127                                                  bool create) {}
 128 #endif  /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
 129
 130 #ifdef CONFIG_IMA_APPRAISE
 131 extern bool is_ima_appraise_enabled(void);
 132 extern void ima_inode_post_setattr(struct dentry *dentry);
 133 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
 134                        const void *xattr_value, size_t xattr_value_len);
 135 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
 136 #else
 137 static inline bool is_ima_appraise_enabled(void)
 138 {
 139         return 0;
 140 }
 141
 142 static inline void ima_inode_post_setattr(struct dentry *dentry)
 143 {
 144         return;
 145 }
 146
 147 static inline int ima_inode_setxattr(struct dentry *dentry,
 148                                      const char *xattr_name,
 149                                      const void *xattr_value,
 150                                      size_t xattr_value_len)
 151 {
 152         return 0;
 153 }
 154
 155 static inline int ima_inode_removexattr(struct dentry *dentry,
 156                                         const char *xattr_name)
 157 {
 158         return 0;
 159 }
 160 #endif /* CONFIG_IMA_APPRAISE */
 161
 162 #if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
 163 extern bool ima_appraise_signature(enum kernel_read_file_id func);
 164 #else
 165 static inline bool ima_appraise_signature(enum kernel_read_file_id func)
 166 {
 167         return false;
 168 }
 169 #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
 170 #endif /* _LINUX_IMA_H */