1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* keyctl kernel bits
3  *
4  * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
5  * Written by David Howells (dhowells@redhat.com)
6  */
7 
8 #ifndef __LINUX_KEYCTL_H
9 #define __LINUX_KEYCTL_H
10 
11 #include <uapi/linux/keyctl.h>
12 
13 struct kernel_pkey_query {
14 	__u32		supported_ops;	/* Which ops are supported */
15 	__u32		key_size;	/* Size of the key in bits */
16 	__u16		max_data_size;	/* Maximum size of raw data to sign in bytes */
17 	__u16		max_sig_size;	/* Maximum size of signature in bytes */
18 	__u16		max_enc_size;	/* Maximum size of encrypted blob in bytes */
19 	__u16		max_dec_size;	/* Maximum size of decrypted blob in bytes */
20 };
21 
22 enum kernel_pkey_operation {
23 	kernel_pkey_encrypt,
24 	kernel_pkey_decrypt,
25 	kernel_pkey_sign,
26 	kernel_pkey_verify,
27 };
28 
29 struct kernel_pkey_params {
30 	struct key	*key;
31 	const char	*encoding;	/* Encoding (eg. "oaep" or "raw" for none) */
32 	const char	*hash_algo;	/* Digest algorithm used (eg. "sha1") or NULL if N/A */
33 	char		*info;		/* Modified info string to be released later */
34 	__u32		in_len;		/* Input data size */
35 	union {
36 		__u32	out_len;	/* Output buffer size (enc/dec/sign) */
37 		__u32	in2_len;	/* 2nd input data size (verify) */
38 	};
39 	enum kernel_pkey_operation op : 8;
40 };
41 
42 #endif /* __LINUX_KEYCTL_H */
43