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
13struct 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
22enum kernel_pkey_operation {
23	kernel_pkey_encrypt,
24	kernel_pkey_decrypt,
25	kernel_pkey_sign,
26	kernel_pkey_verify,
27};
28
29struct 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