2 * Copyright (C) 2005-2010 IBM Corporation
5 * Mimi Zohar <zohar@us.ibm.com>
6 * Kylene Hall <kjhall@us.ibm.com>
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.
16 #ifndef __INTEGRITY_EVM_H
17 #define __INTEGRITY_EVM_H
19 #include <linux/xattr.h>
20 #include <linux/security.h>
22 #include "../integrity.h"
24 #define EVM_INIT_HMAC 0x0001
25 #define EVM_INIT_X509 0x0002
26 #define EVM_ALLOW_METADATA_WRITES 0x0004
27 #define EVM_SETUP_COMPLETE 0x80000000 /* userland has signaled key load */
29 #define EVM_KEY_MASK (EVM_INIT_HMAC | EVM_INIT_X509)
30 #define EVM_INIT_MASK (EVM_INIT_HMAC | EVM_INIT_X509 | EVM_SETUP_COMPLETE | \
31 EVM_ALLOW_METADATA_WRITES)
34 struct list_head list;
38 extern int evm_initialized;
40 #define EVM_ATTR_FSUUID 0x0001
42 extern int evm_hmac_attrs;
44 extern struct crypto_shash *hmac_tfm;
45 extern struct crypto_shash *hash_tfm;
47 /* List of EVM protected security xattrs */
48 extern struct list_head evm_config_xattrnames;
51 struct ima_digest_data hdr;
52 char digest[IMA_MAX_DIGEST_SIZE];
55 int evm_init_key(void);
56 int evm_update_evmxattr(struct dentry *dentry,
57 const char *req_xattr_name,
58 const char *req_xattr_value,
59 size_t req_xattr_value_len);
60 int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
61 const char *req_xattr_value,
62 size_t req_xattr_value_len, struct evm_digest *data);
63 int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
64 const char *req_xattr_value,
65 size_t req_xattr_value_len, char type,
66 struct evm_digest *data);
67 int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
69 int evm_init_secfs(void);