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 24 #define EVM_INIT_HMAC 0x0001 25 #define EVM_INIT_X509 0x0002 26 #define EVM_SETUP 0x80000000 /* userland has signaled key load */ 27 28 #define EVM_INIT_MASK (EVM_INIT_HMAC | EVM_INIT_X509 | EVM_SETUP) 29 30 extern int evm_initialized; 31 extern char *evm_hmac; 32 extern char *evm_hash; 33 34 #define EVM_ATTR_FSUUID 0x0001 35 36 extern int evm_hmac_attrs; 37 38 extern struct crypto_shash *hmac_tfm; 39 extern struct crypto_shash *hash_tfm; 40 41 /* List of EVM protected security xattrs */ 42 extern char *evm_config_xattrnames[]; 43 44 int evm_init_key(void); 45 int evm_update_evmxattr(struct dentry *dentry, 46 const char *req_xattr_name, 47 const char *req_xattr_value, 48 size_t req_xattr_value_len); 49 int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name, 50 const char *req_xattr_value, 51 size_t req_xattr_value_len, char *digest); 52 int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name, 53 const char *req_xattr_value, 54 size_t req_xattr_value_len, char *digest); 55 int evm_init_hmac(struct inode *inode, const struct xattr *xattr, 56 char *hmac_val); 57 int evm_init_secfs(void); 58 59 #endif 60