include/linux/keyctl.h

   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 */