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Work in progress group chats.
Not done yet.
This commit is contained in:
irungentoo
parent
b73ba8244a
commit
c59975dd7e
71
docs/Group_chats.txt
Normal file
71
docs/Group_chats.txt
Normal file
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@ -0,0 +1,71 @@
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Massive public group chats.
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Everyone generates a short term public private key pair right before joining
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the chat.
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Note that for public group chats it is impossible to protect the chat from
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being spied on by a very dedicated attacker, encryption is therefor used as a
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form of spam/access control.
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## Joining the chats
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## Protocol
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Node format:
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```
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[char array (node_id), length=32 bytes][ip (in network byte order), length=4 bytes][port (in network byte order), length=2 bytes][Padding , length=2 bytes]
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```
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Get nodes (Request):
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Packet contents:
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```
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[char with a value of 48][Bob's (The reciever's) Public key (client_id) (32 bytes))][Alice's (The sender's) Public key (client_id) (32 bytes)][Random nonce (24 bytes)][Encrypted with the nonce and private key of the sender:[char with a value of 48][random 8 byte (ping_id)]
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```
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Valid replies: a send_nodes packet
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Send_nodes (response):
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```
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[char with a value of 48][Bob's (The reciever's) Public key (client_id) (32 bytes))][Alice's (The sender's) Public key (client_id) (32 bytes)][Random nonce (24 bytes)][Encrypted with the nonce and private key of the sender:[char with a value of 49][random 8 byte (ping_id)][Nodes in node format, length=40 * (number of nodes (maximum of 6 nodes)) bytes]]
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```
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Broadcast packet:
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```
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[char with a value of 48][Bob's (The reciever's) Public key (client_id) (32 bytes))][Alice's (The sender's) Public key (client_id) (32 bytes)][nonce][Encrypted with the nonce and private key of the sender:[char with a value of 50][Data to send to everyone]]
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```
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Data to send to everyone:
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TODO: signing and spam control + permissions.
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[client_id of sender][uint32_t message number][char with a value representing id of message][data]
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Note: the message number is increased by 1 for each sent message.
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message ids:
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0 - ping
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sent every ~60 seconds by every peer.
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No data.
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16 - new_peer
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Tell everyone about a new peer in the chat.
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[uint8_t public_key[public_key_len]]
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17 - ban_peer
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Ban a peer
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[uint8_t public_key[public_key_len]]
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18 - topic change
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[uint8_t topic[topiclen]]
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48 - name change
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[uint8_t name[namelen]]
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49 - status change
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[uint8_t (status id)]
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64 - chat message
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[uint8_t message[messagelen]]
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65 - action (/me)
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[uint8_t message[messagelen]]
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470
testing/experiment/group_chats.c
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470
testing/experiment/group_chats.c
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/* group_chats.c
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*
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* An implementation of massive text only group chats.
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*
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*
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* Copyright (C) 2013 Tox project All Rights Reserved.
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*
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* This file is part of Tox.
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*
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* Tox is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tox is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Tox. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "group_chats.h"
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#define GROUPCHAT_MAXDATA_LENGTH (MAX_DATA_SIZE - (1 + crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES))
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#define GROUPCHAT_MAXPLAINDATA_LENGTH (GROUPCHAT_MAXDATA_LENGTH - crypto_box_MACBYTES)
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#define GROUP_MAX_SENDNODES (GROUP_CLOSE_CONNECTIONS * 2)
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typedef struct {
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uint64_t pingid;
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//uint8_t client_id[crypto_box_PUBLICKEYBYTES];
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} getnodes_data;
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typedef struct {
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uint8_t client_id[crypto_box_PUBLICKEYBYTES];
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IP_Port ip_port;
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} groupchat_nodes;
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typedef struct {
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uint64_t pingid;
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groupchat_nodes nodes[GROUP_CLOSE_CONNECTIONS];
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//uint8_t client_id[crypto_box_PUBLICKEYBYTES];
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} sendnodes_data;
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/* Compares client_id1 and client_id2 with client_id
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* return 0 if both are same distance
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* return 1 if client_id1 is closer
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* return 2 if client_id2 is closer
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*/
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static int id_closest(uint8_t *id, uint8_t *id1, uint8_t *id2)
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{
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size_t i;
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uint8_t distance1, distance2;
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for (i = 0; i < CLIENT_ID_SIZE; ++i) {
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distance1 = abs(((int8_t *)id)[i] ^ ((int8_t *)id1)[i]);
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distance2 = abs(((int8_t *)id)[i] ^ ((int8_t *)id2)[i]);
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if (distance1 < distance2)
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return 1;
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if (distance1 > distance2)
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return 2;
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}
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return 0;
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}
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/*
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* check if peer with client_id is in peer array.
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*
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* return peer number if peer is in chat.
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* return -1 if peer is not in chat.
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*
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* TODO: make this more efficient.
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*/
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static int peer_in_chat(Group_Chat *chat, uint8_t *client_id)
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{
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uint32_t i;
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for (i = 0; i < chat->numpeers; ++i) {
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/* Equal */
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if (memcmp(chat->group[i].client_id, client_id, crypto_box_PUBLICKEYBYTES) == 0)
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return i;
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}
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return -1;
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}
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#define BAD_NODE_TIMEOUT 30
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/*
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* Check if peer is closer to us that the other peers in the list and if the peer is in the list.
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* Return the number of peers it is closer to if it is not in the closelist.
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* Return -1 if the peer is in the closelist.
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*/
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static int peer_okping(Group_Chat *chat, uint8_t *client_id)
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{
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uint32_t i, j = 0;
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uint64_t temp_time = unix_time();
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) {
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if (chat->close[i].last_recv < temp_time + BAD_NODE_TIMEOUT)
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continue;
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/* Equal */
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if (memcmp(chat->close[i].client_id, client_id, crypto_box_PUBLICKEYBYTES) == 0)
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return -1;
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if (id_closest(chat->self_public_key, chat->close[i].client_id, client_id) == 2)
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++j;
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}
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return j;
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}
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/* Attempt to add a peer to the close list.
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* Update last_recv if it is in list.
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* Attempt to add it to list if it is not.
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*
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* Return 0 if success.
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* Return -1 if peer was not put in list/updated.
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*/
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static int add_closepeer(Group_Chat *chat, uint8_t *client_id, IP_Port ip_port)
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{
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uint32_t i;
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uint64_t temp_time = unix_time();
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) { /* Check if node is already in list, if it is update its last_recv */
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if (memcmp(chat->close[i].client_id, client_id, crypto_box_PUBLICKEYBYTES) == 0) {
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chat->close[i].last_recv = temp_time;
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return 0;
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}
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}
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) { /* Try replacing bad nodes first */
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if (chat->close[i].last_recv < temp_time + BAD_NODE_TIMEOUT) {
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memcpy(chat->close[i].client_id, client_id, crypto_box_PUBLICKEYBYTES);
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chat->close[i].ip_port = ip_port;
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chat->close[i].last_recv = temp_time;
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return 0;
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}
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}
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) { /* Replace nodes if given one is closer. */
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if (id_closest(chat->self_public_key, chat->close[i].client_id, client_id) == 2) {
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memcpy(chat->close[i].client_id, client_id, crypto_box_PUBLICKEYBYTES);
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chat->close[i].ip_port = ip_port;
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chat->close[i].last_recv = temp_time;
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return 0;
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}
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}
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return -1;
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}
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static int send_groupchatpacket(Group_Chat *chat, IP_Port ip_port, uint8_t *public_key, uint8_t *data, uint32_t length,
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uint8_t request_id)
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{
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if (memcmp(chat->self_public_key, public_key, crypto_box_PUBLICKEYBYTES) == 0)
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return -1;
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uint8_t packet[MAX_DATA_SIZE];
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int len = create_request(chat->self_public_key, chat->self_secret_key, packet, public_key, data, length, request_id);
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packet[0] = 48;
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if (len == -1)
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return -1;
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if (sendpacket(chat->net->sock, ip_port, packet, len) == len)
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return 0;
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return -1;
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}
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/*
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* Send data to all peers in close peer list.
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*
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* return the number of peers the packet was sent to.
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*/
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static uint8_t sendto_allpeers(Group_Chat *chat, uint8_t *data, uint16_t length, uint8_t request_id)
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{
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uint16_t sent = 0;
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uint32_t i;
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uint64_t temp_time = unix_time();
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) {
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if (chat->close[i].ip_port.ip.uint32 != 0 && chat->close[i].last_recv > temp_time + BAD_NODE_TIMEOUT) {
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if (send_groupchatpacket(chat, chat->close[i].ip_port, chat->close[i].client_id, data, length, request_id) == 0)
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++sent;
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}
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}
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return sent;
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}
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/*
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* Add a peer to the group chat.
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*
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* return peernum if success or peer already in chat.
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* return -1 if error.
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*/
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static int addpeer(Group_Chat *chat, uint8_t *client_id)
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{
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int peernum = peer_in_chat(chat, client_id);
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if (peernum != -1)
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return peernum;
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Group_Peer *temp;
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temp = realloc(chat->group, sizeof(Group_Peer) * (chat->numpeers + 1));
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if (temp == NULL)
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return -1;
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chat->group = temp;
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memcpy(chat->group[chat->numpeers].client_id, client_id, crypto_box_PUBLICKEYBYTES);
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++chat->numpeers;
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return (chat->numpeers - 1);
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}
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/*
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* Delete a peer to the group chat.
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*
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* return 0 if success
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* return -1 if error.
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*/
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static int delpeer(Group_Chat *chat, uint8_t *client_id)
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{
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uint32_t i;
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Group_Peer *temp;
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for (i = 0; i < chat->numpeers; ++i) {
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/* Equal */
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if (memcmp(chat->group[i].client_id, client_id, crypto_box_PUBLICKEYBYTES) == 0) {
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--chat->numpeers;
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if (chat->numpeers != i) {
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memcpy( chat->group[i].client_id,
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chat->group[chat->numpeers].client_id,
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crypto_box_PUBLICKEYBYTES );
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}
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temp = realloc(chat->group, sizeof(Group_Peer) * (chat->numpeers));
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if (temp == NULL)
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return -1;
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chat->group = temp;
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return 0;
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}
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}
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return -1;
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}
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/* min time between pings sent to one peer in seconds */
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#define PING_TIMEOUT 5
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static int send_getnodes(Group_Chat *chat, IP_Port ip_port, int peernum)
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{
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if (peernum < 0 || peernum >= chat->numpeers)
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return -1;
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uint64_t temp_time = unix_time();
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getnodes_data contents;
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if (chat->group[peernum].last_pinged + PING_TIMEOUT > temp_time)
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return -1;
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contents.pingid = ((uint64_t)random_int() << 32) + random_int();
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chat->group[peernum].last_pinged = temp_time;
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chat->group[peernum].pingid = contents.pingid;
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return send_groupchatpacket(chat, ip_port, chat->group[peernum].client_id, (uint8_t *)&contents, sizeof(contents), 48);
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}
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static int send_sendnodes(Group_Chat *chat, IP_Port ip_port, int peernum, uint64_t pingid)
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{
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if (peernum < 0 || peernum >= chat->numpeers)
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return -1;
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sendnodes_data contents;
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contents.pingid = pingid;
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uint32_t i, j = 0;
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uint64_t temp_time = unix_time();
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for (i = 0; i < GROUP_CLOSE_CONNECTIONS; ++i) {
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if (chat->close[i].last_recv + BAD_NODE_TIMEOUT > temp_time) {
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memcpy(contents.nodes[j].client_id, chat->close[i].client_id, crypto_box_PUBLICKEYBYTES);
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contents.nodes[j].ip_port = ip_port;
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++j;
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}
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}
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if (j == 0)
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return -1;
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return send_groupchatpacket(chat, ip_port, chat->group[peernum].client_id, (uint8_t *)&contents,
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sizeof(contents.pingid) + sizeof(groupchat_nodes) * j, 49);
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}
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static int handle_getnodes(Group_Chat *chat, IP_Port source, int peernum, uint8_t *data, uint32_t len)
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{
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if (len != sizeof(getnodes_data))
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return 1;
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if (peernum < 0 || peernum >= chat->numpeers)
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return 1;
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getnodes_data contents;
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memcpy(&contents, data, sizeof(contents));
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send_sendnodes(chat, source, peernum, contents.pingid);
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return 0;
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}
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static int handle_sendnodes(Group_Chat *chat, IP_Port source, int peernum, uint8_t *data, uint32_t len)
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{
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if (peernum < 0 || peernum >= chat->numpeers)
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return 1;
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if (len > sizeof(sendnodes_data) || len < (sizeof(uint64_t) + sizeof(groupchat_nodes)))
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return 1;
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if ((len - sizeof(uint64_t)) % sizeof(groupchat_nodes) != 0)
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return 1;
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if (chat->group[peernum].last_pinged + PING_TIMEOUT < unix_time())
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return 1;
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sendnodes_data contents;
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memcpy(&contents, data, len);
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if (contents.pingid != chat->group[peernum].pingid)
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return 1;
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uint16_t numnodes = (len - sizeof(contents.pingid)) / sizeof(groupchat_nodes);
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uint32_t i;
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for (i = 0; i < numnodes; ++i) {
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if (peer_okping(chat, contents.nodes[i].client_id) > 0) {
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int peern = peer_in_chat(chat, contents.nodes[i].client_id);
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if (peern == -1)
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continue;
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send_getnodes(chat, contents.nodes[i].ip_port, peern);
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}
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}
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add_closepeer(chat, chat->group[peernum].client_id, source);
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return 0;
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}
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static int handle_data(Group_Chat *chat, uint8_t *data, uint32_t len)
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{
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if (len < 2)
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return 1;
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int handled = 0;
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if (data[0] == 64 && chat->group_message != NULL) {
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//TODO
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(*chat->group_message)(chat, 0, data + 1, len - 1, chat->group_message_userdata);
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handled = 1;
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}
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if (handled == 1) {
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sendto_allpeers(chat, data, len, 50);
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return 0;
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}
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return 1;
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}
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/*
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* Handle get nodes group packet.
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*
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* return 0 if handled correctly.
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* return 1 if error.
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*/
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int handle_groupchatpacket(Group_Chat *chat, IP_Port source, uint8_t *packet, uint32_t length)
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{
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if (length > MAX_DATA_SIZE)
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return 1;
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uint8_t public_key[crypto_box_PUBLICKEYBYTES];
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uint8_t data[MAX_DATA_SIZE];
|
||||
uint8_t number;
|
||||
int len = handle_request(chat->self_public_key, chat->self_secret_key, public_key, data, &number, packet, length);
|
||||
|
||||
if (len <= 0)
|
||||
return 1;
|
||||
|
||||
if (memcmp(chat->self_public_key, public_key, crypto_box_PUBLICKEYBYTES) == 0)
|
||||
return 1;
|
||||
|
||||
int peernum = peer_in_chat(chat, public_key);
|
||||
|
||||
if (peernum == -1)/*NOTE: This is just for testing and will be removed later.*/
|
||||
peernum = addpeer(chat, public_key);
|
||||
|
||||
if (peernum == -1)
|
||||
return 1;
|
||||
|
||||
|
||||
switch (number) {
|
||||
case 48:
|
||||
return handle_getnodes(chat, source, peernum, data, len);
|
||||
|
||||
case 49:
|
||||
return handle_sendnodes(chat, source, peernum, data, len);
|
||||
|
||||
case 50:
|
||||
return handle_data(chat, data, len);
|
||||
|
||||
default:
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
uint32_t m_sendmessage(Group_Chat *chat, uint8_t *message, uint32_t length)
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
void callback_groupmessage(Group_Chat *chat, void (*function)(Group_Chat *chat, int, uint8_t *, uint16_t, void *),
|
||||
void *userdata)
|
||||
{
|
||||
chat->group_message = function;
|
||||
chat->group_message_userdata = userdata;
|
||||
}
|
||||
|
||||
Group_Chat *new_groupchat(Networking_Core *net)
|
||||
{
|
||||
if (net == 0)
|
||||
return 0;
|
||||
|
||||
Group_Chat *chat = calloc(1, sizeof(Group_Chat));
|
||||
chat->net = net;
|
||||
return chat;
|
||||
}
|
||||
|
||||
|
||||
void kill_groupchat(Group_Chat *chat)
|
||||
{
|
||||
free(chat->group);
|
||||
free(chat);
|
||||
}
|
||||
|
||||
void chat_bootstrap(Group_Chat *chat, IP_Port ip_port, int peernum)
|
||||
{
|
||||
send_getnodes(chat, ip_port, peernum);
|
||||
}
|
||||
109
testing/experiment/group_chats.h
Normal file
109
testing/experiment/group_chats.h
Normal file
|
|
@ -0,0 +1,109 @@
|
|||
/* group_chats.h
|
||||
*
|
||||
* An implementation of massive text only group chats.
|
||||
*
|
||||
*
|
||||
* Copyright (C) 2013 Tox project All Rights Reserved.
|
||||
*
|
||||
* This file is part of Tox.
|
||||
*
|
||||
* Tox is free software: you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation, either version 3 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* Tox is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with Tox. If not, see <http://www.gnu.org/licenses/>.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef GROUP_CHATS_H
|
||||
#define GROUP_CHATS_H
|
||||
|
||||
#include "../../toxcore/net_crypto.h"
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
typedef struct {
|
||||
uint8_t client_id[crypto_box_PUBLICKEYBYTES];
|
||||
uint64_t last_recv;
|
||||
uint64_t pingid;
|
||||
uint64_t last_pinged;
|
||||
uint32_t last_message_number;
|
||||
} Group_Peer;
|
||||
|
||||
typedef struct {
|
||||
uint8_t client_id[crypto_box_PUBLICKEYBYTES];
|
||||
IP_Port ip_port;
|
||||
uint64_t last_recv;
|
||||
|
||||
} Group_Close;
|
||||
|
||||
#define GROUP_CLOSE_CONNECTIONS 6
|
||||
|
||||
typedef struct Group_Chat {
|
||||
Networking_Core *net;
|
||||
uint8_t self_public_key[crypto_box_PUBLICKEYBYTES];
|
||||
uint8_t self_secret_key[crypto_box_SECRETKEYBYTES];
|
||||
|
||||
Group_Peer *group;
|
||||
Group_Close close[GROUP_CLOSE_CONNECTIONS];
|
||||
uint32_t numpeers;
|
||||
|
||||
uint32_t message_number;
|
||||
void (*group_message)(struct Group_Chat *m, int, uint8_t *, uint16_t, void *);
|
||||
void *group_message_userdata;
|
||||
|
||||
} Group_Chat;
|
||||
|
||||
/*
|
||||
* Set callback function for chat messages.
|
||||
*
|
||||
* format of function is: function(Group_Chat *chat, peer number, message, message length, userdata)
|
||||
*/
|
||||
|
||||
void callback_groupmessage(Group_Chat *chat, void (*function)(Group_Chat *chat, int, uint8_t *, uint16_t, void *),
|
||||
void *userdata);
|
||||
|
||||
/*
|
||||
* Send a message to the group.
|
||||
*
|
||||
*/
|
||||
uint32_t m_sendmessage(Group_Chat *chat, uint8_t *message, uint32_t length);
|
||||
|
||||
/* Create a new group chat.
|
||||
*
|
||||
* Returns a new group chat instance if success.
|
||||
*
|
||||
* Returns a NULL pointer if fail.
|
||||
*/
|
||||
Group_Chat *new_groupchat(Networking_Core *net);
|
||||
|
||||
|
||||
/* Kill a group chat
|
||||
*
|
||||
* Frees the memory and everything.
|
||||
*/
|
||||
void kill_groupchat(Group_Chat *chat);
|
||||
|
||||
|
||||
/* if we receive a group chat packet we call this function so it can be handled.
|
||||
return 0 if packet is handled correctly.
|
||||
return 1 if it didn't handle the packet or if the packet was shit. */
|
||||
int handle_groupchatpacket(Group_Chat *chat, IP_Port source, uint8_t *packet, uint32_t length);
|
||||
|
||||
|
||||
void chat_bootstrap(Group_Chat *chat, IP_Port ip_port, int peernum);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
19
testing/experiment/group_chats_test.c
Normal file
19
testing/experiment/group_chats_test.c
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
#include "group_chats.h"
|
||||
#define NUM_CHATS 8
|
||||
|
||||
int main()
|
||||
{
|
||||
IP ip;
|
||||
ip.uint32 = 0;
|
||||
uint32_t i;
|
||||
Group_Chat *chats[NUM_CHATS];
|
||||
|
||||
for (i = 0; i < NUM_CHATS; ++i) {
|
||||
chats[i] = new_groupchat(new_networking(ip, 1234));
|
||||
|
||||
if (chats[i] == 0)
|
||||
exit(1);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -483,12 +483,12 @@ static int getnodes(DHT *dht, IP_Port ip_port, uint8_t *public_key, uint8_t *cli
|
|||
{
|
||||
/* Check if packet is going to be sent to ourself. */
|
||||
if (id_equal(public_key, dht->c->self_public_key) || is_gettingnodes(dht, ip_port, 0))
|
||||
return 1;
|
||||
return -1;
|
||||
|
||||
uint64_t ping_id = add_gettingnodes(dht, ip_port);
|
||||
|
||||
if (ping_id == 0)
|
||||
return 1;
|
||||
return -1;
|
||||
|
||||
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id) + CLIENT_ID_SIZE + ENCRYPTION_PADDING];
|
||||
uint8_t plain[sizeof(ping_id) + CLIENT_ID_SIZE];
|
||||
|
|
@ -522,7 +522,7 @@ static int sendnodes(DHT *dht, IP_Port ip_port, uint8_t *public_key, uint8_t *cl
|
|||
{
|
||||
/* Check if packet is going to be sent to ourself. */
|
||||
if (id_equal(public_key, dht->c->self_public_key))
|
||||
return 1;
|
||||
return -1;
|
||||
|
||||
uint8_t data[1 + CLIENT_ID_SIZE + crypto_box_NONCEBYTES + sizeof(ping_id)
|
||||
+ sizeof(Node_format) * MAX_SENT_NODES + ENCRYPTION_PADDING];
|
||||
|
|
|
|||
|
|
@ -254,30 +254,31 @@ int create_request(uint8_t *send_public_key, uint8_t *send_secret_key, uint8_t *
|
|||
*
|
||||
* return -1 if not valid request.
|
||||
*/
|
||||
static int handle_request(Net_Crypto *c, uint8_t *public_key, uint8_t *data, uint8_t *request_id, uint8_t *packet,
|
||||
uint16_t length)
|
||||
int handle_request(uint8_t *self_public_key, uint8_t *self_secret_key, uint8_t *public_key, uint8_t *data,
|
||||
uint8_t *request_id, uint8_t *packet, uint16_t length)
|
||||
{
|
||||
|
||||
if (length > crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + 1 + ENCRYPTION_PADDING &&
|
||||
length <= MAX_DATA_SIZE + ENCRYPTION_PADDING &&
|
||||
memcmp(packet + 1, c->self_public_key, crypto_box_PUBLICKEYBYTES) == 0) {
|
||||
memcpy(public_key, packet + 1 + crypto_box_PUBLICKEYBYTES, crypto_box_PUBLICKEYBYTES);
|
||||
uint8_t nonce[crypto_box_NONCEBYTES];
|
||||
uint8_t temp[MAX_DATA_SIZE];
|
||||
memcpy(nonce, packet + 1 + crypto_box_PUBLICKEYBYTES * 2, crypto_box_NONCEBYTES);
|
||||
int len1 = decrypt_data(public_key, c->self_secret_key, nonce,
|
||||
packet + 1 + crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES,
|
||||
length - (crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + 1), temp);
|
||||
length <= MAX_DATA_SIZE) {
|
||||
if (memcmp(packet + 1, self_public_key, crypto_box_PUBLICKEYBYTES) == 0) {
|
||||
memcpy(public_key, packet + 1 + crypto_box_PUBLICKEYBYTES, crypto_box_PUBLICKEYBYTES);
|
||||
uint8_t nonce[crypto_box_NONCEBYTES];
|
||||
uint8_t temp[MAX_DATA_SIZE];
|
||||
memcpy(nonce, packet + 1 + crypto_box_PUBLICKEYBYTES * 2, crypto_box_NONCEBYTES);
|
||||
int len1 = decrypt_data(public_key, self_secret_key, nonce,
|
||||
packet + 1 + crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES,
|
||||
length - (crypto_box_PUBLICKEYBYTES * 2 + crypto_box_NONCEBYTES + 1), temp);
|
||||
|
||||
if (len1 == -1 || len1 == 0)
|
||||
return -1;
|
||||
if (len1 == -1 || len1 == 0)
|
||||
return -1;
|
||||
|
||||
request_id[0] = temp[0];
|
||||
--len1;
|
||||
memcpy(data, temp + 1, len1);
|
||||
return len1;
|
||||
} else
|
||||
return -1;
|
||||
request_id[0] = temp[0];
|
||||
--len1;
|
||||
memcpy(data, temp + 1, len1);
|
||||
return len1;
|
||||
}
|
||||
}
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
void cryptopacket_registerhandler(Net_Crypto *c, uint8_t byte, cryptopacket_handler_callback cb, void *object)
|
||||
|
|
@ -299,7 +300,7 @@ static int cryptopacket_handle(void *object, IP_Port source, uint8_t *packet, ui
|
|||
uint8_t public_key[crypto_box_PUBLICKEYBYTES];
|
||||
uint8_t data[MAX_DATA_SIZE];
|
||||
uint8_t number;
|
||||
int len = handle_request(dht->c, public_key, data, &number, packet, length);
|
||||
int len = handle_request(dht->c->self_public_key, dht->c->self_secret_key, public_key, data, &number, packet, length);
|
||||
|
||||
if (len == -1 || len == 0)
|
||||
return 1;
|
||||
|
|
|
|||
|
|
@ -139,6 +139,12 @@ int write_cryptpacket(Net_Crypto *c, int crypt_connection_id, uint8_t *data, uin
|
|||
int create_request(uint8_t *send_public_key, uint8_t *send_secret_key, uint8_t *packet, uint8_t *recv_public_key,
|
||||
uint8_t *data, uint32_t length, uint8_t request_id);
|
||||
|
||||
/* puts the senders public key in the request in public_key, the data from the request
|
||||
in data if a friend or ping request was sent to us and returns the length of the data.
|
||||
packet is the request packet and length is its length
|
||||
return -1 if not valid request. */
|
||||
int handle_request(uint8_t *self_public_key, uint8_t *self_secret_key, uint8_t *public_key, uint8_t *data,
|
||||
uint8_t *request_id, uint8_t *packet, uint16_t length);
|
||||
|
||||
/* Function to call when request beginning with byte is received. */
|
||||
void cryptopacket_registerhandler(Net_Crypto *c, uint8_t byte, cryptopacket_handler_callback cb, void *object);
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user