summaryrefslogtreecommitdiffstats
path: root/security/integrity/evm/evm.h
diff options
context:
space:
mode:
Diffstat (limited to 'security/integrity/evm/evm.h')
-rw-r--r--security/integrity/evm/evm.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/security/integrity/evm/evm.h b/security/integrity/evm/evm.h
new file mode 100644
index 000000000..f2fef2b5e
--- /dev/null
+++ b/security/integrity/evm/evm.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2005-2010 IBM Corporation
+ *
+ * Authors:
+ * Mimi Zohar <zohar@us.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * File: evm.h
+ */
+
+#ifndef __INTEGRITY_EVM_H
+#define __INTEGRITY_EVM_H
+
+#include <linux/xattr.h>
+#include <linux/security.h>
+
+#include "../integrity.h"
+
+#define EVM_INIT_HMAC 0x0001
+#define EVM_INIT_X509 0x0002
+#define EVM_ALLOW_METADATA_WRITES 0x0004
+#define EVM_SETUP_COMPLETE 0x80000000 /* userland has signaled key load */
+
+#define EVM_KEY_MASK (EVM_INIT_HMAC | EVM_INIT_X509)
+#define EVM_INIT_MASK (EVM_INIT_HMAC | EVM_INIT_X509 | EVM_SETUP_COMPLETE | \
+ EVM_ALLOW_METADATA_WRITES)
+
+struct xattr_list {
+ struct list_head list;
+ char *name;
+};
+
+extern int evm_initialized;
+
+#define EVM_ATTR_FSUUID 0x0001
+
+extern int evm_hmac_attrs;
+
+extern struct crypto_shash *hmac_tfm;
+extern struct crypto_shash *hash_tfm;
+
+/* List of EVM protected security xattrs */
+extern struct list_head evm_config_xattrnames;
+
+struct evm_digest {
+ struct ima_digest_data hdr;
+ char digest[IMA_MAX_DIGEST_SIZE];
+} __packed;
+
+int evm_init_key(void);
+int evm_update_evmxattr(struct dentry *dentry,
+ const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len);
+int evm_calc_hmac(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len, struct evm_digest *data);
+int evm_calc_hash(struct dentry *dentry, const char *req_xattr_name,
+ const char *req_xattr_value,
+ size_t req_xattr_value_len, char type,
+ struct evm_digest *data);
+int evm_init_hmac(struct inode *inode, const struct xattr *xattr,
+ char *hmac_val);
+int evm_init_secfs(void);
+
+#endif