/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_LINUX_FSCRYPT_H
#define _UAPI_LINUX_FSCRYPT_H

#include <linux/ioctl.h>
#include <linux/types.h>


#define FSCRYPT_POLICY_FLAGS_PAD_4		0x00
#define FSCRYPT_POLICY_FLAGS_PAD_8		0x01
#define FSCRYPT_POLICY_FLAGS_PAD_16		0x02
#define FSCRYPT_POLICY_FLAGS_PAD_32		0x03
#define FSCRYPT_POLICY_FLAGS_PAD_MASK		0x03
#define FSCRYPT_POLICY_FLAG_DIRECT_KEY		0x04
#define FSCRYPT_POLICY_FLAG_IV_INO_LBLK_64	0x08
#define FSCRYPT_POLICY_FLAG_IV_INO_LBLK_32	0x10


#define FSCRYPT_MODE_AES_256_XTS		1
#define FSCRYPT_MODE_AES_256_CTS		4
#define FSCRYPT_MODE_AES_128_CBC		5
#define FSCRYPT_MODE_AES_128_CTS		6
#define FSCRYPT_MODE_ADIANTUM			9
#define FSCRYPT_MODE_AES_256_HCTR2		10



#define FSCRYPT_POLICY_V1		0
#define FSCRYPT_KEY_DESCRIPTOR_SIZE	8
struct fscrypt_policy_v1 {
	__u8 version;
	__u8 contents_encryption_mode;
	__u8 filenames_encryption_mode;
	__u8 flags;
	__u8 master_key_descriptor[FSCRYPT_KEY_DESCRIPTOR_SIZE];
};


#define FSCRYPT_KEY_DESC_PREFIX		"fscrypt:"
#define FSCRYPT_KEY_DESC_PREFIX_SIZE	8
#define FSCRYPT_MAX_KEY_SIZE		64
struct fscrypt_key {
	__u32 mode;
	__u8 raw[FSCRYPT_MAX_KEY_SIZE];
	__u32 size;
};


#define FSCRYPT_POLICY_V2		2
#define FSCRYPT_KEY_IDENTIFIER_SIZE	16
struct fscrypt_policy_v2 {
	__u8 version;
	__u8 contents_encryption_mode;
	__u8 filenames_encryption_mode;
	__u8 flags;
	__u8 __reserved[4];
	__u8 master_key_identifier[FSCRYPT_KEY_IDENTIFIER_SIZE];
};


struct fscrypt_get_policy_ex_arg {
	__u64 policy_size; 
	union {
		__u8 version;
		struct fscrypt_policy_v1 v1;
		struct fscrypt_policy_v2 v2;
	} policy; 
};


#define FSCRYPT_KEY_SPEC_TYPE_DESCRIPTOR	1


#define FSCRYPT_KEY_SPEC_TYPE_IDENTIFIER	2


struct fscrypt_key_specifier {
	__u32 type;	
	__u32 __reserved;
	union {
		__u8 __reserved[32]; 
		__u8 descriptor[FSCRYPT_KEY_DESCRIPTOR_SIZE];
		__u8 identifier[FSCRYPT_KEY_IDENTIFIER_SIZE];
	} u;
};


struct fscrypt_provisioning_key_payload {
	__u32 type;
	__u32 __reserved;
	__u8 raw[];
};


struct fscrypt_add_key_arg {
	struct fscrypt_key_specifier key_spec;
	__u32 raw_size;
	__u32 key_id;
	__u32 __reserved[8];
	__u8 raw[];
};


struct fscrypt_remove_key_arg {
	struct fscrypt_key_specifier key_spec;
#define FSCRYPT_KEY_REMOVAL_STATUS_FLAG_FILES_BUSY	0x00000001
#define FSCRYPT_KEY_REMOVAL_STATUS_FLAG_OTHER_USERS	0x00000002
	__u32 removal_status_flags;	
	__u32 __reserved[5];
};


struct fscrypt_get_key_status_arg {
	
	struct fscrypt_key_specifier key_spec;
	__u32 __reserved[6];

	
#define FSCRYPT_KEY_STATUS_ABSENT		1
#define FSCRYPT_KEY_STATUS_PRESENT		2
#define FSCRYPT_KEY_STATUS_INCOMPLETELY_REMOVED	3
	__u32 status;
#define FSCRYPT_KEY_STATUS_FLAG_ADDED_BY_SELF   0x00000001
	__u32 status_flags;
	__u32 user_count;
	__u32 __out_reserved[13];
};

#define FS_IOC_SET_ENCRYPTION_POLICY		_IOR('f', 19, struct fscrypt_policy_v1)
#define FS_IOC_GET_ENCRYPTION_PWSALT		_IOW('f', 20, __u8[16])
#define FS_IOC_GET_ENCRYPTION_POLICY		_IOW('f', 21, struct fscrypt_policy_v1)
#define FS_IOC_GET_ENCRYPTION_POLICY_EX		_IOWR('f', 22, __u8[9]) 
#define FS_IOC_ADD_ENCRYPTION_KEY		_IOWR('f', 23, struct fscrypt_add_key_arg)
#define FS_IOC_REMOVE_ENCRYPTION_KEY		_IOWR('f', 24, struct fscrypt_remove_key_arg)
#define FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS	_IOWR('f', 25, struct fscrypt_remove_key_arg)
#define FS_IOC_GET_ENCRYPTION_KEY_STATUS	_IOWR('f', 26, struct fscrypt_get_key_status_arg)
#define FS_IOC_GET_ENCRYPTION_NONCE		_IOR('f', 27, __u8[16])




#ifndef __KERNEL__
#define fscrypt_policy			fscrypt_policy_v1
#define FS_KEY_DESCRIPTOR_SIZE		FSCRYPT_KEY_DESCRIPTOR_SIZE
#define FS_POLICY_FLAGS_PAD_4		FSCRYPT_POLICY_FLAGS_PAD_4
#define FS_POLICY_FLAGS_PAD_8		FSCRYPT_POLICY_FLAGS_PAD_8
#define FS_POLICY_FLAGS_PAD_16		FSCRYPT_POLICY_FLAGS_PAD_16
#define FS_POLICY_FLAGS_PAD_32		FSCRYPT_POLICY_FLAGS_PAD_32
#define FS_POLICY_FLAGS_PAD_MASK	FSCRYPT_POLICY_FLAGS_PAD_MASK
#define FS_POLICY_FLAG_DIRECT_KEY	FSCRYPT_POLICY_FLAG_DIRECT_KEY
#define FS_POLICY_FLAGS_VALID		0x07	
#define FS_ENCRYPTION_MODE_INVALID	0	
#define FS_ENCRYPTION_MODE_AES_256_XTS	FSCRYPT_MODE_AES_256_XTS
#define FS_ENCRYPTION_MODE_AES_256_GCM	2	
#define FS_ENCRYPTION_MODE_AES_256_CBC	3	
#define FS_ENCRYPTION_MODE_AES_256_CTS	FSCRYPT_MODE_AES_256_CTS
#define FS_ENCRYPTION_MODE_AES_128_CBC	FSCRYPT_MODE_AES_128_CBC
#define FS_ENCRYPTION_MODE_AES_128_CTS	FSCRYPT_MODE_AES_128_CTS
#define FS_ENCRYPTION_MODE_SPECK128_256_XTS	7	
#define FS_ENCRYPTION_MODE_SPECK128_256_CTS	8	
#define FS_ENCRYPTION_MODE_ADIANTUM	FSCRYPT_MODE_ADIANTUM
#define FS_KEY_DESC_PREFIX		FSCRYPT_KEY_DESC_PREFIX
#define FS_KEY_DESC_PREFIX_SIZE		FSCRYPT_KEY_DESC_PREFIX_SIZE
#define FS_MAX_KEY_SIZE			FSCRYPT_MAX_KEY_SIZE
#endif 

#endif 
