drivers/md/dm-verity-verify-sig.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2019 Microsoft Corporation.
   4  *
   5  * Author:  Jaskaran Singh Khurana <jaskarankhurana@linux.microsoft.com>
   6  *
   7  */
   8 #ifndef DM_VERITY_SIG_VERIFICATION_H
   9 #define DM_VERITY_SIG_VERIFICATION_H
  10
  11 #define DM_VERITY_ROOT_HASH_VERIFICATION "DM Verity Sig Verification"
  12 #define DM_VERITY_ROOT_HASH_VERIFICATION_OPT_SIG_KEY "root_hash_sig_key_desc"
  13
  14 struct dm_verity_sig_opts {
  15         unsigned int sig_size;
  16         u8 *sig;
  17 };
  18
  19 #ifdef CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG
  20
  21 #define DM_VERITY_ROOT_HASH_VERIFICATION_OPTS 2
  22
  23 int verity_verify_root_hash(const void *data, size_t data_len,
  24                             const void *sig_data, size_t sig_len);
  25 bool verity_verify_is_sig_opt_arg(const char *arg_name);
  26
  27 int verity_verify_sig_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
  28                                     struct dm_verity_sig_opts *sig_opts,
  29                                     unsigned int *argc, const char *arg_name);
  30
  31 void verity_verify_sig_opts_cleanup(struct dm_verity_sig_opts *sig_opts);
  32
  33 #else
  34
  35 #define DM_VERITY_ROOT_HASH_VERIFICATION_OPTS 0
  36
  37 static inline int verity_verify_root_hash(const void *data, size_t data_len,
  38                                           const void *sig_data, size_t sig_len)
  39 {
  40         return 0;
  41 }
  42
  43 static inline bool verity_verify_is_sig_opt_arg(const char *arg_name)
  44 {
  45         return false;
  46 }
  47
  48 static inline int verity_verify_sig_parse_opt_args(struct dm_arg_set *as,
  49                         struct dm_verity *v, struct dm_verity_sig_opts *sig_opts,
  50                         unsigned int *argc, const char *arg_name)
  51 {
  52         return -EINVAL;
  53 }
  54
  55 static inline void verity_verify_sig_opts_cleanup(struct dm_verity_sig_opts *sig_opts)
  56 {
  57 }
  58
  59 #endif /* CONFIG_DM_VERITY_VERIFY_ROOTHASH_SIG */
  60 #endif /* DM_VERITY_SIG_VERIFICATION_H */