1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (C) 2005-2010 IBM Corporation
 4 *
 5 * Authors:
 6 * Mimi Zohar <zohar@us.ibm.com>
 7 * Kylene Hall <kjhall@us.ibm.com>
 8 *
 
 
 
 
 9 * File: evm.h
 
10 */
11
12#ifndef __INTEGRITY_EVM_H
13#define __INTEGRITY_EVM_H
14
15#include <linux/xattr.h>
16#include <linux/security.h>
17
18#include "../integrity.h"
19
20#define EVM_INIT_HMAC	0x0001
21#define EVM_INIT_X509	0x0002
22#define EVM_ALLOW_METADATA_WRITES	0x0004
23#define EVM_SETUP_COMPLETE 0x80000000 /* userland has signaled key load */
24
25#define EVM_KEY_MASK (EVM_INIT_HMAC | EVM_INIT_X509)
26#define EVM_INIT_MASK (EVM_INIT_HMAC | EVM_INIT_X509 | EVM_SETUP_COMPLETE | \
27		       EVM_ALLOW_METADATA_WRITES)
28
29struct xattr_list {
30	struct list_head list;
31	char *name;
32};
33
34extern int evm_initialized;
35
36#define EVM_ATTR_FSUUID		0x0001
37
38extern int evm_hmac_attrs;
39
40extern struct crypto_shash *hmac_tfm;
41extern struct crypto_shash *hash_tfm;
42
43/* List of EVM protected security xattrs */
44extern struct list_head evm_config_xattrnames;
45
46struct evm_digest {
47	struct ima_digest_data hdr;
48	char digest[IMA_MAX_DIGEST_SIZE];
49} __packed;
50
51int evm_init_key(void);
52int evm_update_evmxattr(struct dentry *dentry,
53			const char *req_xattr_name,
54			const char *req_xattr_value,
55			size_t req_xattr_value_len);
56int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
57		  const char *req_xattr_value,
58		  size_t req_xattr_value_len, struct evm_digest *data);
59int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
60		  const char *req_xattr_value,
61		  size_t req_xattr_value_len, char type,
62		  struct evm_digest *data);
63int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
64		  char *hmac_val);
65int evm_init_secfs(void);
66
67#endif

 
 1/*
 2 * Copyright (C) 2005-2010 IBM Corporation
 3 *
 4 * Authors:
 5 * Mimi Zohar <zohar@us.ibm.com>
 6 * Kylene Hall <kjhall@us.ibm.com>
 7 *
 8 * This program is free software; you can redistribute it and/or modify
 9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, version 2 of the License.
11 *
12 * File: evm.h
13 *
14 */
15
16#ifndef __INTEGRITY_EVM_H
17#define __INTEGRITY_EVM_H
18
19#include <linux/xattr.h>
20#include <linux/security.h>
21
22#include "../integrity.h"
23
 
 
 
 
 
 
 
 
 
 
 
 
 
 
24extern int evm_initialized;
25extern char *evm_hmac;
26extern char *evm_hash;
27extern int evm_hmac_version;
 
28
29extern struct crypto_shash *hmac_tfm;
30extern struct crypto_shash *hash_tfm;
31
32/* List of EVM protected security xattrs */
33extern char *evm_config_xattrnames[];
 
 
 
 
 
34
35int evm_init_key(void);
36int evm_update_evmxattr(struct dentry *dentry,
37			const char *req_xattr_name,
38			const char *req_xattr_value,
39			size_t req_xattr_value_len);
40int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
41		  const char *req_xattr_value,
42		  size_t req_xattr_value_len, char *digest);
43int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
44		  const char *req_xattr_value,
45		  size_t req_xattr_value_len, char *digest);
 
46int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
47		  char *hmac_val);
48int evm_init_secfs(void);
49
50#endif