1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2005-2010 IBM Corporation
12 #ifndef __INTEGRITY_EVM_H
13 #define __INTEGRITY_EVM_H
15 #include <linux/xattr.h>
16 #include <linux/security.h>
18 #include "../integrity.h"
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 */
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)
30 struct list_head list;
34 extern int evm_initialized;
36 #define EVM_ATTR_FSUUID 0x0001
38 extern int evm_hmac_attrs;
40 extern struct crypto_shash *hmac_tfm;
41 extern struct crypto_shash *hash_tfm;
43 /* List of EVM protected security xattrs */
44 extern struct list_head evm_config_xattrnames;
47 struct ima_digest_data hdr;
48 char digest[IMA_MAX_DIGEST_SIZE];
51 int evm_init_key(void);
52 int 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);
56 int 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);
59 int 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);
63 int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
65 int evm_init_secfs(void);