libcoap 4.3.5-develop-72190a8
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oscore_crypto.h
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1/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2
3/*
4 * Copyright (c) 2018, SICS, RISE AB
5 * All rights reserved.
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7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
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31 */
32
48#ifndef _OSCORE_CRYPTO_H
49#define _OSCORE_CRYPTO_H
50
51#include <coap3/coap_internal.h>
52
59#define HKDF_INFO_MAXLEN 25
60#define HKDF_OUTPUT_MAXLEN 25
61#define AES_CCM_TAG 8
62
63/* Plaintext Maxlen and Tag Maxlen is quite generous. */
64#define AEAD_PLAINTEXT_MAXLEN COAP_MAX_CHUNK_SIZE
65#define AEAD_TAG_MAXLEN COAP_MAX_CHUNK_SIZE
66
77int oscore_hmac_hash(cose_hmac_alg_t hmac_alg,
78 coap_bin_const_t *key,
79 coap_bin_const_t *data,
80 coap_bin_const_t **hmac);
81
94int oscore_hkdf_extract(cose_hkdf_alg_t hkdf_alg,
95 coap_bin_const_t *salt,
96 coap_bin_const_t *ikm,
97 coap_bin_const_t **hkdf_extract);
98
112int oscore_hkdf_expand(cose_hkdf_alg_t hkdf_alg,
113 coap_bin_const_t *prk,
114 uint8_t *info,
115 size_t info_len,
116 uint8_t *okm,
117 size_t okm_len);
118
133int oscore_hkdf(cose_hkdf_alg_t hkdf_alg,
134 coap_bin_const_t *salt,
135 coap_bin_const_t *ikm,
136 uint8_t *info,
137 size_t info_len,
138 uint8_t *okm,
139 size_t okm_len);
140
143#endif /* _OSCORE_CRYPTO_H */
coap_internal.h
Pulls together all the internal only header files.
cose_hkdf_alg_t
cose_hkdf_alg_t
Definition oscore_cose.h:165
cose_hmac_alg_t
cose_hmac_alg_t
Definition oscore_cose.h:157
oscore_hkdf_expand
int oscore_hkdf_expand(cose_hkdf_alg_t hkdf_alg, coap_bin_const_t *prk, uint8_t *info, size_t info_len, uint8_t *okm, size_t okm_len)
Derive the key using HKDF-Expand() function.
Definition oscore_crypto.c:101
oscore_hkdf
int oscore_hkdf(cose_hkdf_alg_t hkdf_alg, coap_bin_const_t *salt, coap_bin_const_t *ikm, uint8_t *info, size_t info_len, uint8_t *okm, size_t okm_len)
Derive the key using HKDF() function.
Definition oscore_crypto.c:158
oscore_hmac_hash
int oscore_hmac_hash(cose_hmac_alg_t hmac_alg, coap_bin_const_t *key, coap_bin_const_t *data, coap_bin_const_t **hmac)
Derive the hmac hash using HMAC-HASH() function.
Definition oscore_crypto.c:57
oscore_hkdf_extract
int oscore_hkdf_extract(cose_hkdf_alg_t hkdf_alg, coap_bin_const_t *salt, coap_bin_const_t *ikm, coap_bin_const_t **hkdf_extract)
Derive the pseudorandom key using HKDF-Extract() function.
Definition oscore_crypto.c:73
coap_bin_const_t
CoAP binary data definition with const data.
Definition coap_str.h:64