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
verity_verify_root_hash(const void * data,size_t data_len,const void * sig_data,size_t sig_len)37 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
verity_verify_is_sig_opt_arg(const char * arg_name)43 bool verity_verify_is_sig_opt_arg(const char *arg_name)
44 {
45 return false;
46 }
47
verity_verify_sig_parse_opt_args(struct dm_arg_set * as,struct dm_verity * v,struct dm_verity_sig_opts * sig_opts,unsigned int * argc,const char * arg_name)48 int verity_verify_sig_parse_opt_args(struct dm_arg_set *as, struct dm_verity *v,
49 struct dm_verity_sig_opts *sig_opts,
50 unsigned int *argc, const char *arg_name)
51 {
52 return -EINVAL;
53 }
54
verity_verify_sig_opts_cleanup(struct dm_verity_sig_opts * sig_opts)55 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 */
61