LXR linux/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
  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