forked from luck/tmp_suning_uos_patched
7626676320
A crypto HW kernel module can possibly initialize the EVM key from the kernel __init code to enable EVM before calling the 'init' process. This patch provides a function evm_set_key() to set the EVM key directly without using the KEY subsystem. Changes in v4: * kernel-doc style for evm_set_key Changes in v3: * error reporting moved to evm_set_key * EVM_INIT_HMAC moved to evm_set_key * added bitop to prevent key setting race Changes in v2: * use size_t for key size instead of signed int * provide EVM_MAX_KEY_SIZE macro in <linux/evm.h> * provide EVM_MIN_KEY_SIZE macro in <linux/evm.h> Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@huawei.com> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
|
|
* evm.h
|
|
*
|
|
* Copyright (c) 2009 IBM Corporation
|
|
* Author: Mimi Zohar <zohar@us.ibm.com>
|
|
*/
|
|
|
|
#ifndef _LINUX_EVM_H
|
|
#define _LINUX_EVM_H
|
|
|
|
#include <linux/integrity.h>
|
|
#include <linux/xattr.h>
|
|
|
|
struct integrity_iint_cache;
|
|
|
|
#ifdef CONFIG_EVM
|
|
extern int evm_set_key(void *key, size_t keylen);
|
|
extern enum integrity_status evm_verifyxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
void *xattr_value,
|
|
size_t xattr_value_len,
|
|
struct integrity_iint_cache *iint);
|
|
extern int evm_inode_setattr(struct dentry *dentry, struct iattr *attr);
|
|
extern void evm_inode_post_setattr(struct dentry *dentry, int ia_valid);
|
|
extern int evm_inode_setxattr(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size);
|
|
extern void evm_inode_post_setxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
const void *xattr_value,
|
|
size_t xattr_value_len);
|
|
extern int evm_inode_removexattr(struct dentry *dentry, const char *xattr_name);
|
|
extern void evm_inode_post_removexattr(struct dentry *dentry,
|
|
const char *xattr_name);
|
|
extern int evm_inode_init_security(struct inode *inode,
|
|
const struct xattr *xattr_array,
|
|
struct xattr *evm);
|
|
#ifdef CONFIG_FS_POSIX_ACL
|
|
extern int posix_xattr_acl(const char *xattrname);
|
|
#else
|
|
static inline int posix_xattr_acl(const char *xattrname)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
#else
|
|
|
|
static inline int evm_set_key(void *key, size_t keylen)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#ifdef CONFIG_INTEGRITY
|
|
static inline enum integrity_status evm_verifyxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
void *xattr_value,
|
|
size_t xattr_value_len,
|
|
struct integrity_iint_cache *iint)
|
|
{
|
|
return INTEGRITY_UNKNOWN;
|
|
}
|
|
#endif
|
|
|
|
static inline int evm_inode_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void evm_inode_post_setattr(struct dentry *dentry, int ia_valid)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int evm_inode_setxattr(struct dentry *dentry, const char *name,
|
|
const void *value, size_t size)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void evm_inode_post_setxattr(struct dentry *dentry,
|
|
const char *xattr_name,
|
|
const void *xattr_value,
|
|
size_t xattr_value_len)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int evm_inode_removexattr(struct dentry *dentry,
|
|
const char *xattr_name)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void evm_inode_post_removexattr(struct dentry *dentry,
|
|
const char *xattr_name)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static inline int evm_inode_init_security(struct inode *inode,
|
|
const struct xattr *xattr_array,
|
|
struct xattr *evm)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_EVM */
|
|
#endif /* LINUX_EVM_H */
|