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111 lines
5.0 KiB
C
111 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later
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* Copyright © 2016-2018 The TokTok team.
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* Copyright © 2013 Tox project.
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*/
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/*
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* Implementation of the announce part of docs/Prevent_Tracking.txt
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*/
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#ifndef C_TOXCORE_TOXCORE_ONION_ANNOUNCE_H
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#define C_TOXCORE_TOXCORE_ONION_ANNOUNCE_H
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#include "logger.h"
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#include "onion.h"
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#define ONION_ANNOUNCE_MAX_ENTRIES 160
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#define ONION_ANNOUNCE_TIMEOUT 300
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#define ONION_PING_ID_SIZE CRYPTO_SHA256_SIZE
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#define ONION_ANNOUNCE_SENDBACK_DATA_LENGTH (sizeof(uint64_t))
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#define ONION_ANNOUNCE_REQUEST_SIZE (1 + CRYPTO_NONCE_SIZE + CRYPTO_PUBLIC_KEY_SIZE + ONION_PING_ID_SIZE + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_PUBLIC_KEY_SIZE + ONION_ANNOUNCE_SENDBACK_DATA_LENGTH + CRYPTO_MAC_SIZE)
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#define ONION_ANNOUNCE_RESPONSE_MIN_SIZE (1 + ONION_ANNOUNCE_SENDBACK_DATA_LENGTH + CRYPTO_NONCE_SIZE + 1 + ONION_PING_ID_SIZE + CRYPTO_MAC_SIZE)
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#define ONION_ANNOUNCE_RESPONSE_MAX_SIZE (ONION_ANNOUNCE_RESPONSE_MIN_SIZE + sizeof(Node_format)*MAX_SENT_NODES)
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#define ONION_DATA_RESPONSE_MIN_SIZE (1 + CRYPTO_NONCE_SIZE + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE)
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#define ONION_DATA_REQUEST_MIN_SIZE (1 + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_NONCE_SIZE + CRYPTO_PUBLIC_KEY_SIZE + CRYPTO_MAC_SIZE)
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#define MAX_DATA_REQUEST_SIZE (ONION_MAX_DATA_SIZE - ONION_DATA_REQUEST_MIN_SIZE)
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typedef struct Onion_Announce Onion_Announce;
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/* These two are not public; they are for tests only! */
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uint8_t *onion_announce_entry_public_key(Onion_Announce *onion_a, uint32_t entry);
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void onion_announce_entry_set_time(Onion_Announce *onion_a, uint32_t entry, uint64_t time);
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/* Create an onion announce request packet in packet of max_packet_length (recommended size ONION_ANNOUNCE_REQUEST_SIZE).
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*
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* dest_client_id is the public key of the node the packet will be sent to.
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* public_key and secret_key is the kepair which will be used to encrypt the request.
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* ping_id is the ping id that will be sent in the request.
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* client_id is the client id of the node we are searching for.
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* data_public_key is the public key we want others to encrypt their data packets with.
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* sendback_data is the data of ONION_ANNOUNCE_SENDBACK_DATA_LENGTH length that we expect to
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* receive back in the response.
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*
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* return -1 on failure.
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* return packet length on success.
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*/
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int create_announce_request(uint8_t *packet, uint16_t max_packet_length, const uint8_t *dest_client_id,
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const uint8_t *public_key, const uint8_t *secret_key, const uint8_t *ping_id, const uint8_t *client_id,
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const uint8_t *data_public_key, uint64_t sendback_data);
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/* Create an onion data request packet in packet of max_packet_length (recommended size ONION_MAX_PACKET_SIZE).
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*
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* public_key is the real public key of the node which we want to send the data of length length to.
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* encrypt_public_key is the public key used to encrypt the data packet.
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*
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* nonce is the nonce to encrypt this packet with
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*
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* return -1 on failure.
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* return 0 on success.
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*/
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int create_data_request(uint8_t *packet, uint16_t max_packet_length, const uint8_t *public_key,
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const uint8_t *encrypt_public_key, const uint8_t *nonce, const uint8_t *data, uint16_t length);
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/* Create and send an onion announce request packet.
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*
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* path is the path the request will take before it is sent to dest.
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*
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* public_key and secret_key is the kepair which will be used to encrypt the request.
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* ping_id is the ping id that will be sent in the request.
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* client_id is the client id of the node we are searching for.
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* data_public_key is the public key we want others to encrypt their data packets with.
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* sendback_data is the data of ONION_ANNOUNCE_SENDBACK_DATA_LENGTH length that we expect to
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* receive back in the response.
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*
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* return -1 on failure.
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* return 0 on success.
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*/
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int send_announce_request(Networking_Core *net, const Onion_Path *path, Node_format dest, const uint8_t *public_key,
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const uint8_t *secret_key, const uint8_t *ping_id, const uint8_t *client_id, const uint8_t *data_public_key,
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uint64_t sendback_data);
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/* Create and send an onion data request packet.
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*
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* path is the path the request will take before it is sent to dest.
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* (if dest knows the person with the public_key they should
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* send the packet to that person in the form of a response)
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*
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* public_key is the real public key of the node which we want to send the data of length length to.
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* encrypt_public_key is the public key used to encrypt the data packet.
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*
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* nonce is the nonce to encrypt this packet with
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*
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* The maximum length of data is MAX_DATA_REQUEST_SIZE.
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*
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* return -1 on failure.
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* return 0 on success.
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*/
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int send_data_request(Networking_Core *net, const Onion_Path *path, IP_Port dest, const uint8_t *public_key,
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const uint8_t *encrypt_public_key, const uint8_t *nonce, const uint8_t *data, uint16_t length);
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Onion_Announce *new_onion_announce(const Logger *log, Mono_Time *mono_time, DHT *dht);
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void kill_onion_announce(Onion_Announce *onion_a);
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#endif
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