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