LXR linux/include/linux/keyctl.h

   1/* keyctl kernel bits
   2 *
   3 * Copyright (C) 2016 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11
  12#ifndef __LINUX_KEYCTL_H
  13#define __LINUX_KEYCTL_H
  14
  15#include <uapi/linux/keyctl.h>
  16
  17struct kernel_pkey_query {
  18        __u32           supported_ops;  /* Which ops are supported */
  19        __u32           key_size;       /* Size of the key in bits */
  20        __u16           max_data_size;  /* Maximum size of raw data to sign in bytes */
  21        __u16           max_sig_size;   /* Maximum size of signature in bytes */
  22        __u16           max_enc_size;   /* Maximum size of encrypted blob in bytes */
  23        __u16           max_dec_size;   /* Maximum size of decrypted blob in bytes */
  24};
  25
  26enum kernel_pkey_operation {
  27        kernel_pkey_encrypt,
  28        kernel_pkey_decrypt,
  29        kernel_pkey_sign,
  30        kernel_pkey_verify,
  31};
  32
  33struct kernel_pkey_params {
  34        struct key      *key;
  35        const char      *encoding;      /* Encoding (eg. "oaep" or "raw" for none) */
  36        const char      *hash_algo;     /* Digest algorithm used (eg. "sha1") or NULL if N/A */
  37        char            *info;          /* Modified info string to be released later */
  38        __u32           in_len;         /* Input data size */
  39        union {
  40                __u32   out_len;        /* Output buffer size (enc/dec/sign) */
  41                __u32   in2_len;        /* 2nd input data size (verify) */
  42        };
  43        enum kernel_pkey_operation op : 8;
  44};
  45
  46#endif /* __LINUX_KEYCTL_H */
  47