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