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 */ 61