forked from osmocom/wireshark
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* packet-cose.h
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* Definitions for CBOR Object Signing and Encryption (COSE) dissection
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* References:
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* RFC 8152: https://tools.ietf.org/html/rfc8152
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*
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* Copyright 2019-2021, Brian Sipos <brian.sipos@gmail.com>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*/
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#ifndef __PACKET_COSE_H__
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#define __PACKET_COSE_H__
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#include <glib.h>
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/**
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* COSE message dissectors are registered multiple ways:
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* 1. The unit-keyed dissector table "cose.msgtag" with keys being
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* IANA-registered CBOR tag values (e.g., 18 is COSE_Sign1).
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* 2. The string-keyed dissector table "media_type" with keys being
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* IANA-registered media type IDs
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* (e.g., application/cose; cose-type="cose-sign1" is COSE_Sign1).
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* 3. The registered dissectors for names "cose" and message names in
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* all-lowercase form (e.g., "cose_sign1").
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* There is currently no CoAP dissector table to register with.
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*
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* COSE message dissectors use the tag (wscbor_tag_t *) value, if used to
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* discriminate the message type, as the user data pointer.
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*
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* COSE header label dissectors are registered with the dissector table
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* "cose.header" and key parameter dissectors with the table "cose.keyparam"
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* both with cose_param_key_t* keys.
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* The header/parameter dissectors use a cose_header_context_t* as the user
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* data pointer.
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*
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* An additional dissector "cose.msg.headers" will dissect an individual
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* header map structure outside of a COSE message.
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*/
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// A header parameter or key-type parameter key
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typedef struct {
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/// The Algorithm or Key Type context or NULL for
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/// all-context keys.
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GVariant *principal;
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/// Label simple value (int or tstr) as variant.
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/// Object owned by this struct.
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GVariant *label;
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} cose_param_key_t;
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/** Compatible with GHashFunc signature.
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*/
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guint cose_param_key_hash(gconstpointer ptr);
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/** Compatible with GEqualFunc signature.
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*/
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gboolean cose_param_key_equal(gconstpointer a, gconstpointer b);
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/// User data for header/key-parameter dissectors
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typedef struct {
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/// Principal value (alg or kty) of the map, if defined.
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GVariant *principal;
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/// Current label being processed
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GVariant *label;
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} cose_header_context_t;
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#endif /* __PACKET_COSE_H__ */
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