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diff --git a/encryptedfs_provisioning.h b/encryptedfs_provisioning.h
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+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+
+#ifndef __ENCRYPTEDFS_PROVISIONING_H__
+#define __ENCRYPTEDFS_PROVISIONING_H__
+
+#define MODE_ENCRYPTED_FS_DISABLED 0
+#define MODE_ENCRYPTED_FS_ENABLED 1
+
+#define ENCRYPTED_FS_OK 0
+#define ENCRYPTED_FS_ERROR (-1)
+
+#define ENCRYPTED_FS_KEY_SIZE 16
+#define ENCRYPTED_FS_SALT_SIZE 16
+#define ENCRYPTED_FS_MAX_HASH_SIZE 128
+#define ENTROPY_MAX_SIZE 4096
+
+struct encrypted_fs_info {
+ int mode;
+ char key[ENCRYPTED_FS_KEY_SIZE];
+ char salt[ENCRYPTED_FS_SALT_SIZE];
+ int salt_length;
+ char hash[ENCRYPTED_FS_MAX_HASH_SIZE];
+ int hash_length;
+ char entropy[ENTROPY_MAX_SIZE];
+ int entropy_length;
+};
+
+typedef struct encrypted_fs_info encrypted_fs_info;
+
+int read_encrypted_fs_info(encrypted_fs_info *secure_fs_data);
+
+int restore_encrypted_fs_info(encrypted_fs_info *secure_data);
+
+#endif /* __ENCRYPTEDFS_PROVISIONING_H__ */
+