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
  17 struct 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
  26 enum kernel_pkey_operation {
  27         kernel_pkey_encrypt,
  28         kernel_pkey_decrypt,
  29         kernel_pkey_sign,
  30         kernel_pkey_verify,
  31 };
  32
  33 struct 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 */