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_load_data(enum kernel_load_data_id id);
  22 extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
  23 extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
  24                               enum kernel_read_file_id id);
  25 extern void ima_post_path_mknod(struct dentry *dentry);
  26 extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
  27 extern void ima_kexec_cmdline(const void *buf, int size);
  28
  29 #ifdef CONFIG_IMA_KEXEC
  30 extern void ima_add_kexec_buffer(struct kimage *image);
  31 #endif
  32
  33 #if (defined(CONFIG_X86) && defined(CONFIG_EFI)) || defined(CONFIG_S390) \
  34         || defined(CONFIG_PPC_SECURE_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_load_data(enum kernel_load_data_id id)
  75 {
  76         return 0;
  77 }
  78
  79 static inline int ima_read_file(struct file *file, enum kernel_read_file_id id)
  80 {
  81         return 0;
  82 }
  83
  84 static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
  85                                      enum kernel_read_file_id id)
  86 {
  87         return 0;
  88 }
  89
  90 static inline void ima_post_path_mknod(struct dentry *dentry)
  91 {
  92         return;
  93 }
  94
  95 static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
  96 {
  97         return -EOPNOTSUPP;
  98 }
  99
 100 static inline void ima_kexec_cmdline(const void *buf, int size) {}
 101 #endif /* CONFIG_IMA */
 102
 103 #ifndef CONFIG_IMA_KEXEC
 104 struct kimage;
 105
 106 static inline void ima_add_kexec_buffer(struct kimage *image)
 107 {}
 108 #endif
 109
 110 #ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
 111 extern void ima_post_key_create_or_update(struct key *keyring,
 112                                           struct key *key,
 113                                           const void *payload, size_t plen,
 114                                           unsigned long flags, bool create);
 115 #else
 116 static inline void ima_post_key_create_or_update(struct key *keyring,
 117                                                  struct key *key,
 118                                                  const void *payload,
 119                                                  size_t plen,
 120                                                  unsigned long flags,
 121                                                  bool create) {}
 122 #endif  /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
 123
 124 #ifdef CONFIG_IMA_APPRAISE
 125 extern bool is_ima_appraise_enabled(void);
 126 extern void ima_inode_post_setattr(struct dentry *dentry);
 127 extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
 128                        const void *xattr_value, size_t xattr_value_len);
 129 extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
 130 #else
 131 static inline bool is_ima_appraise_enabled(void)
 132 {
 133         return 0;
 134 }
 135
 136 static inline void ima_inode_post_setattr(struct dentry *dentry)
 137 {
 138         return;
 139 }
 140
 141 static inline int ima_inode_setxattr(struct dentry *dentry,
 142                                      const char *xattr_name,
 143                                      const void *xattr_value,
 144                                      size_t xattr_value_len)
 145 {
 146         return 0;
 147 }
 148
 149 static inline int ima_inode_removexattr(struct dentry *dentry,
 150                                         const char *xattr_name)
 151 {
 152         return 0;
 153 }
 154 #endif /* CONFIG_IMA_APPRAISE */
 155
 156 #if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
 157 extern bool ima_appraise_signature(enum kernel_read_file_id func);
 158 #else
 159 static inline bool ima_appraise_signature(enum kernel_read_file_id func)
 160 {
 161         return false;
 162 }
 163 #endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
 164 #endif /* _LINUX_IMA_H */