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/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 int ima_inode_hash(struct inode *inode, 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_APPRAISE_BOOTPARAM
  36 extern void ima_appraise_parse_cmdline(void);
  37 #else
  38 static inline void ima_appraise_parse_cmdline(void) {}
  39 #endif
  40
  41 #ifdef CONFIG_IMA_KEXEC
  42 extern void ima_add_kexec_buffer(struct kimage *image);
  43 #endif
  44
  45 #ifdef CONFIG_IMA_SECURE_AND_OR_TRUSTED_BOOT
  46 extern bool arch_ima_get_secureboot(void);
  47 extern const char * const *arch_get_ima_policy(void);
  48 #else
  49 static inline bool arch_ima_get_secureboot(void)
  50 {
  51         return false;
  52 }
  53
  54 static inline const char * const *arch_get_ima_policy(void)
  55 {
  56         return NULL;
  57 }
  58 #endif
  59
  60 #else
  61 static inline int ima_bprm_check(struct linux_binprm *bprm)
  62 {
  63         return 0;
  64 }
  65
  66 static inline int ima_file_check(struct file *file, int mask)
  67 {
  68         return 0;
  69 }
  70
  71 static inline void ima_post_create_tmpfile(struct inode *inode)
  72 {
  73 }
  74
  75 static inline void ima_file_free(struct file *file)
  76 {
  77         return;
  78 }
  79
  80 static inline int ima_file_mmap(struct file *file, unsigned long prot)
  81 {
  82         return 0;
  83 }
  84
  85 static inline int ima_file_mprotect(struct vm_area_struct *vma,
  86                                     unsigned long prot)
  87 {
  88         return 0;
  89 }
  90
  91 static inline int ima_load_data(enum kernel_load_data_id id, bool contents)
  92 {
  93         return 0;
  94 }
  95
  96 static inline int ima_post_load_data(char *buf, loff_t size,
  97                                      enum kernel_load_data_id id,
  98                                      char *description)
  99 {
 100         return 0;
 101 }
 102
 103 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id,
 104                                 bool contents)
 105 {
 106         return 0;
 107 }
 108
 109 static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
 110                                      enum kernel_read_file_id id)
 111 {
 112         return 0;
 113 }
 114
 115 static inline void ima_post_path_mknod(struct dentry *dentry)
 116 {
 117         return;
 118 }
 119
 120 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
 121 {
 122         return -EOPNOTSUPP;
 123 }
 124
 125 static inline int ima_inode_hash(struct inode *inode, char *buf, size_t buf_size)
 126 {
 127         return -EOPNOTSUPP;
 128 }
 129
 130 static inline void ima_kexec_cmdline(int kernel_fd, const void *buf, int size) {}
 131 #endif /* CONFIG_IMA */
 132
 133 #ifndef CONFIG_IMA_KEXEC
 134 struct kimage;
 135
 136 static inline void ima_add_kexec_buffer(struct kimage *image)
 137 {}
 138 #endif
 139
 140 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
 141 extern void ima_post_key_create_or_update(struct key *keyring,
 142                                           struct key *key,
 143                                           const void *payload, size_t plen,
 144                                           unsigned long flags, bool create);
 145 #else
 146 static inline void ima_post_key_create_or_update(struct key *keyring,
 147                                                  struct key *key,
 148                                                  const void *payload,
 149                                                  size_t plen,
 150                                                  unsigned long flags,
 151                                                  bool create) {}
 152 #endif  /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
 153
 154 #ifdef CONFIG_IMA_APPRAISE
 155 extern bool is_ima_appraise_enabled(void);
 156 extern void ima_inode_post_setattr(struct dentry *dentry);
 157 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
 158                        const void *xattr_value, size_t xattr_value_len);
 159 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
 160 #else
 161 static inline bool is_ima_appraise_enabled(void)
 162 {
 163         return 0;
 164 }
 165
 166 static inline void ima_inode_post_setattr(struct dentry *dentry)
 167 {
 168         return;
 169 }
 170
 171 static inline int ima_inode_setxattr(struct dentry *dentry,
 172                                      const char *xattr_name,
 173                                      const void *xattr_value,
 174                                      size_t xattr_value_len)
 175 {
 176         return 0;
 177 }
 178
 179 static inline int ima_inode_removexattr(struct dentry *dentry,
 180                                         const char *xattr_name)
 181 {
 182         return 0;
 183 }
 184 #endif /* CONFIG_IMA_APPRAISE */
 185
 186 #if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
 187 extern bool ima_appraise_signature(enum kernel_read_file_id func);
 188 #else
 189 static inline bool ima_appraise_signature(enum kernel_read_file_id func)
 190 {
 191         return false;
 192 }
 193 #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
 194 #endif /* _LINUX_IMA_H */