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/*
* Copyright (C) 2009-2010 IBM Corporation
*
* Authors:
* Mimi Zohar <zohar@us.ibm.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*
*/
#include <linux/types.h>
#include <linux/integrity.h>
#include <crypto/sha.h>
/* iint action cache flags */
#define IMA_MEASURE 0x0001
#define IMA_MEASURED 0x0002
#define IMA_APPRAISE 0x0004
#define IMA_APPRAISED 0x0008
/*#define IMA_COLLECT 0x0010 do not use this flag */
#define IMA_COLLECTED 0x0020
#define IMA_AUDIT 0x0040
#define IMA_AUDITED 0x0080
/* iint cache flags */
#define IMA_ACTION_FLAGS 0xff00
#define IMA_DIGSIG 0x0100
#define IMA_DIGSIG_REQUIRED 0x0200
#define IMA_DO_MASK (IMA_MEASURE | IMA_APPRAISE | IMA_AUDIT)
#define IMA_DONE_MASK (IMA_MEASURED | IMA_APPRAISED | IMA_AUDITED \
| IMA_COLLECTED)
enum evm_ima_xattr_type {
IMA_XATTR_DIGEST = 0x01,
EVM_XATTR_HMAC,
EVM_IMA_XATTR_DIGSIG,
};
struct evm_ima_xattr_data {
u8 type;
u8 digest[SHA1_DIGEST_SIZE];
} __attribute__((packed));
/* integrity data associated with an inode */
struct integrity_iint_cache {
struct rb_node rb_node; /* rooted in integrity_iint_tree */
struct inode *inode; /* back pointer to inode in question */
u64 version; /* track inode changes */
unsigned short flags;
struct evm_ima_xattr_data ima_xattr;
enum integrity_status ima_status:4;
enum integrity_status evm_status:4;
};
/* rbtree tree calls to lookup, insert, delete
* integrity data associated with an inode.
*/
struct integrity_iint_cache *integrity_iint_insert(struct inode *inode);
struct integrity_iint_cache *integrity_iint_find(struct inode *inode);
#define INTEGRITY_KEYRING_EVM 0
#define INTEGRITY_KEYRING_MODULE 1
#define INTEGRITY_KEYRING_IMA 2
#define INTEGRITY_KEYRING_MAX 3
#ifdef CONFIG_INTEGRITY_SIGNATURE
int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen,
const char *digest, int digestlen);
#else
static inline int integrity_digsig_verify(const unsigned int id,
const char *sig, int siglen,
const char *digest, int digestlen)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_INTEGRITY_SIGNATURE */
/* set during initialization */
extern int iint_initialized;
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