mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-13 01:36:55 +07:00
6beea7afcc
This allows other parts of the kernel (perhaps a stacked LSM allowing system monitoring, eg. the proposed KRSI LSM [1]) to retrieve the hash of a given file from IMA if it's present in the iint cache. It's true that the existence of the hash means that it's also in the audit logs or in /sys/kernel/security/ima/ascii_runtime_measurements, but it can be difficult to pull that information out for every subsequent exec. This is especially true if a given host has been up for a long time and the file was first measured a long time ago. It should be kept in mind that this function gives access to cached entries which can be removed, for instance on security_inode_free(). This is based on Peter Moody's patch: https://sourceforge.net/p/linux-ima/mailman/message/33036180/ [1] https://lkml.org/lkml/2019/9/10/393 Signed-off-by: Florent Revest <revest@google.com> Reviewed-by: KP Singh <kpsingh@chromium.org> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
165 lines
4.0 KiB
C
165 lines
4.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2008 IBM Corporation
|
|
* Author: Mimi Zohar <zohar@us.ibm.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_IMA_H
|
|
#define _LINUX_IMA_H
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/security.h>
|
|
#include <linux/kexec.h>
|
|
struct linux_binprm;
|
|
|
|
#ifdef CONFIG_IMA
|
|
extern int ima_bprm_check(struct linux_binprm *bprm);
|
|
extern int ima_file_check(struct file *file, int mask);
|
|
extern void ima_post_create_tmpfile(struct inode *inode);
|
|
extern void ima_file_free(struct file *file);
|
|
extern int ima_file_mmap(struct file *file, unsigned long prot);
|
|
extern int ima_load_data(enum kernel_load_data_id id);
|
|
extern int ima_read_file(struct file *file, enum kernel_read_file_id id);
|
|
extern int ima_post_read_file(struct file *file, void *buf, loff_t size,
|
|
enum kernel_read_file_id id);
|
|
extern void ima_post_path_mknod(struct dentry *dentry);
|
|
extern int ima_file_hash(struct file *file, char *buf, size_t buf_size);
|
|
extern void ima_kexec_cmdline(const void *buf, int size);
|
|
|
|
#ifdef CONFIG_IMA_KEXEC
|
|
extern void ima_add_kexec_buffer(struct kimage *image);
|
|
#endif
|
|
|
|
#if (defined(CONFIG_X86) && defined(CONFIG_EFI)) || defined(CONFIG_S390) \
|
|
|| defined(CONFIG_PPC_SECURE_BOOT)
|
|
extern bool arch_ima_get_secureboot(void);
|
|
extern const char * const *arch_get_ima_policy(void);
|
|
#else
|
|
static inline bool arch_ima_get_secureboot(void)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
static inline const char * const *arch_get_ima_policy(void)
|
|
{
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
#else
|
|
static inline int ima_bprm_check(struct linux_binprm *bprm)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_file_check(struct file *file, int mask)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_post_create_tmpfile(struct inode *inode)
|
|
{
|
|
}
|
|
|
|
static inline void ima_file_free(struct file *file)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_file_mmap(struct file *file, unsigned long prot)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_load_data(enum kernel_load_data_id id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_read_file(struct file *file, enum kernel_read_file_id id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_post_read_file(struct file *file, void *buf, loff_t size,
|
|
enum kernel_read_file_id id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_post_path_mknod(struct dentry *dentry)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_file_hash(struct file *file, char *buf, size_t buf_size)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static inline void ima_kexec_cmdline(const void *buf, int size) {}
|
|
#endif /* CONFIG_IMA */
|
|
|
|
#ifndef CONFIG_IMA_KEXEC
|
|
struct kimage;
|
|
|
|
static inline void ima_add_kexec_buffer(struct kimage *image)
|
|
{}
|
|
#endif
|
|
|
|
#ifdef CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS
|
|
extern void ima_post_key_create_or_update(struct key *keyring,
|
|
struct key *key,
|
|
const void *payload, size_t plen,
|
|
unsigned long flags, bool create);
|
|
#else
|
|
static inline void ima_post_key_create_or_update(struct key *keyring,
|
|
struct key *key,
|
|
const void *payload,
|
|
size_t plen,
|
|
unsigned long flags,
|
|
bool create) {}
|
|
#endif /* CONFIG_IMA_MEASURE_ASYMMETRIC_KEYS */
|
|
|
|
#ifdef CONFIG_IMA_APPRAISE
|
|
extern bool is_ima_appraise_enabled(void);
|
|
extern void ima_inode_post_setattr(struct dentry *dentry);
|
|
extern int ima_inode_setxattr(struct dentry *dentry, const char *xattr_name,
|
|
const void *xattr_value, size_t xattr_value_len);
|
|
extern int ima_inode_removexattr(struct dentry *dentry, const char *xattr_name);
|
|
#else
|
|
static inline bool is_ima_appraise_enabled(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void ima_inode_post_setattr(struct dentry *dentry)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int ima_inode_setxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
const void *xattr_value,
|
|
size_t xattr_value_len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int ima_inode_removexattr(struct dentry *dentry,
|
|
const char *xattr_name)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_IMA_APPRAISE */
|
|
|
|
#if defined(CONFIG_IMA_APPRAISE) && defined(CONFIG_INTEGRITY_TRUSTED_KEYRING)
|
|
extern bool ima_appraise_signature(enum kernel_read_file_id func);
|
|
#else
|
|
static inline bool ima_appraise_signature(enum kernel_read_file_id func)
|
|
{
|
|
return false;
|
|
}
|
|
#endif /* CONFIG_IMA_APPRAISE && CONFIG_INTEGRITY_TRUSTED_KEYRING */
|
|
#endif /* _LINUX_IMA_H */
|