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/* packet-oscore.h
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __PACKET_OSCORE_H__
#define __PACKET_OSCORE_H__
/* OSCORE uses AEAD algorithms defined in RFC8152 (COSE)
* We only implement the default algorithm which corresponds to CCM*
* */
typedef enum {
COSE_AES_CCM_16_64_128 = 10,
} cose_aead_alg_t;
typedef enum {
STATUS_ERROR_DECRYPT_FAILED = 0,
STATUS_ERROR_CBCMAC_FAILED,
STATUS_ERROR_TAG_CHECK_FAILED,
STATUS_ERROR_MESSAGE_TOO_SMALL,
STATUS_SUCCESS_DECRYPTED_TAG_TRUNCATED,
STATUS_SUCCESS_DECRYPTED_TAG_CHECKED,
} oscore_decryption_status_t;
/* Structure containing information regarding all necessary OSCORE message fields. */
typedef struct oscore_context {
/* Pre-Shared Parameters as Strings */
char *master_secret_prefs;
char *master_salt_prefs;
char *id_context_prefs;
char *sender_id_prefs;
char *recipient_id_prefs;
cose_aead_alg_t algorithm;
/* Pre-Shared Parameters as Byte Arrays */
GByteArray *master_secret;
GByteArray *master_salt;
GByteArray *id_context;
GByteArray *sender_id;
GByteArray *recipient_id;
/* Derived Parameters */
GByteArray *request_decryption_key;
GByteArray *response_decryption_key;
GByteArray *common_iv; /* IV used to generate the nonce */
} oscore_context_t;
/* Data from the lower layer (CoAP/HTTP) necessary for OSCORE to decrypt the packet */
typedef struct oscore_info {
uint8_t *kid;
uint8_t kid_len;
uint8_t *kid_context;
uint8_t kid_context_len;
uint8_t *piv;
uint8_t piv_len;
uint8_t *request_piv;
uint8_t request_piv_len;
bool response;
} oscore_info_t;
#endif /* __PACKET_OSCORE_H__ */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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