/* tox.h
*
* The Tox public API.
*
* 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 .
*
*/
#ifndef TOX_H
#define TOX_H
#include
#if defined(_WIN32) || defined(__WIN32__) || defined (WIN32)
#ifndef WINVER
//Windows XP
#define WINVER 0x0501
#endif
#include
#include
#include
/* sa_family_t is the sockaddr_in / sockaddr_in6 family field */
typedef short sa_family_t;
#ifndef true
#define true 1
#endif
#ifndef false
#define false 0
#endif
#else
#include
#include
#include
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define TOX_MAX_NAME_LENGTH 128
#define TOX_MAX_STATUSMESSAGE_LENGTH 128
#define TOX_CLIENT_ID_SIZE 32
#define TOX_FRIEND_ADDRESS_SIZE (TOX_CLIENT_ID_SIZE + sizeof(uint32_t) + sizeof(uint16_t))
#define TOX_PORTRANGE_FROM 33445
#define TOX_PORTRANGE_TO 33545
#define TOX_PORT_DEFAULT TOX_PORTRANGE_FROM
typedef union {
uint8_t c[4];
uint16_t s[2];
uint32_t i;
} tox_IP4;
typedef union {
uint8_t uint8[16];
uint16_t uint16[8];
uint32_t uint32[4];
struct in6_addr in6_addr;
} tox_IP6;
typedef struct {
sa_family_t family;
union {
tox_IP4 ip4;
tox_IP6 ip6;
};
} tox_IP;
/* will replace IP_Port as soon as the complete infrastructure is in place
* removed the unused union and padding also */
typedef struct {
tox_IP ip;
uint16_t port;
} tox_IP_Port;
#define TOX_ENABLE_IPV6_DEFAULT 1
/* Errors for m_addfriend
* FAERR - Friend Add Error
*/
enum {
TOX_FAERR_TOOLONG = -1,
TOX_FAERR_NOMESSAGE = -2,
TOX_FAERR_OWNKEY = -3,
TOX_FAERR_ALREADYSENT = -4,
TOX_FAERR_UNKNOWN = -5,
TOX_FAERR_BADCHECKSUM = -6,
TOX_FAERR_SETNEWNOSPAM = -7,
TOX_FAERR_NOMEM = -8
};
/* USERSTATUS -
* Represents userstatuses someone can have.
*/
typedef enum {
TOX_USERSTATUS_NONE,
TOX_USERSTATUS_AWAY,
TOX_USERSTATUS_BUSY,
TOX_USERSTATUS_INVALID
}
TOX_USERSTATUS;
#ifndef __TOX_DEFINED__
#define __TOX_DEFINED__
typedef struct Tox Tox;
#endif
/* NOTE: Strings in Tox are all UTF-8, also the last byte in all strings must be NULL (0).
*
* The length when passing those strings to the core includes that NULL character.
*
* If you send non NULL terminated strings Tox will force NULL terminates them when it receives them.
*/
/* return TOX_FRIEND_ADDRESS_SIZE byte address to give to others.
* format: [client_id (32 bytes)][nospam number (4 bytes)][checksum (2 bytes)]
*/
void tox_get_address(Tox *tox, uint8_t *address);
/* Add a friend.
* Set the data that will be sent along with friend request.
* address is the address of the friend (returned by getaddress of the friend you wish to add) it must be TOX_FRIEND_ADDRESS_SIZE bytes. TODO: add checksum.
* data is the data and length is the length.
*
* return the friend number if success.
* return TOX_FA_TOOLONG if message length is too long.
* return TOX_FAERR_NOMESSAGE if no message (message length must be >= 1 byte).
* return TOX_FAERR_OWNKEY if user's own key.
* return TOX_FAERR_ALREADYSENT if friend request already sent or already a friend.
* return TOX_FAERR_UNKNOWN for unknown error.
* return TOX_FAERR_BADCHECKSUM if bad checksum in address.
* return TOX_FAERR_SETNEWNOSPAM if the friend was already there but the nospam was different.
* (the nospam for that friend was set to the new one).
* return TOX_FAERR_NOMEM if increasing the friend list size fails.
*/
int tox_add_friend(Tox *tox, uint8_t *address, uint8_t *data, uint16_t length);
/* Add a friend without sending a friendrequest.
* return the friend number if success.
* return -1 if failure.
*/
int tox_add_friend_norequest(Tox *tox, uint8_t *client_id);
/* return the friend id associated to that client id.
return -1 if no such friend */
int tox_get_friend_id(Tox *tox, uint8_t *client_id);
/* Copies the public key associated to that friend id into client_id buffer.
* Make sure that client_id is of size CLIENT_ID_SIZE.
* return 0 if success.
* return -1 if failure.
*/
int tox_get_client_id(Tox *tox, int friend_id, uint8_t *client_id);
/* Remove a friend. */
int tox_del_friend(Tox *tox, int friendnumber);
/* Checks friend's connecting status.
*
* return 1 if friend is connected to us (Online).
* return 0 if friend is not connected to us (Offline).
* return -1 on failure.
*/
int tox_get_friend_connection_status(Tox *tox, int friendnumber);
/* Checks if there exists a friend with given friendnumber.
*
* return 1 if friend exists.
* return 0 if friend doesn't exist.
*/
int tox_friend_exists(Tox *tox, int friendnumber);
/* Send a text chat message to an online friend.
*
* return the message id if packet was successfully put into the send queue.
* return 0 if it was not.
*
* You will want to retain the return value, it will be passed to your read_receipt callback
* if one is received.
* m_sendmessage_withid will send a message with the id of your choosing,
* however we can generate an id for you by calling plain m_sendmessage.
*/
uint32_t tox_send_message(Tox *tox, int friendnumber, uint8_t *message, uint32_t length);
uint32_t tox_send_message_withid(Tox *tox, int friendnumber, uint32_t theid, uint8_t *message, uint32_t length);
/* Send an action to an online friend.
*
* return the message id if packet was successfully put into the send queue.
* return 0 if it was not.
*
* You will want to retain the return value, it will be passed to your read_receipt callback
* if one is received.
* m_sendaction_withid will send an action message with the id of your choosing,
* however we can generate an id for you by calling plain m_sendaction.
*/
uint32_t tox_send_action(Tox *tox, int friendnumber, uint8_t *action, uint32_t length);
uint32_t tox_send_action_withid(Tox *tox, int friendnumber, uint32_t theid, uint8_t *action, uint32_t length);
/* Set our nickname.
* name must be a string of maximum MAX_NAME_LENGTH length.
* length must be at least 1 byte.
* length is the length of name with the NULL terminator.
*
* return 0 if success.
* return -1 if failure.
*/
int tox_set_name(Tox *tox, uint8_t *name, uint16_t length);
/*
* Get your nickname.
* m - The messanger context to use.
* name - Pointer to a string for the name.
* nlen - The length of the string buffer.
*
* return length of name.
* return 0 on error.
*/
uint16_t tox_get_self_name(Tox *tox, uint8_t *name, uint16_t nlen);
/* Get name of friendnumber and put it in name.
* name needs to be a valid memory location with a size of at least MAX_NAME_LENGTH (128) bytes.
*
* return length of name (with the NULL terminator) if success.
* return -1 if failure.
*/
int tox_get_name(Tox *tox, int friendnumber, uint8_t *name);
/* Set our user status.
* You are responsible for freeing status after.
*
* returns 0 on success.
* returns -1 on failure.
*/
int tox_set_status_message(Tox *tox, uint8_t *status, uint16_t length);
int tox_set_user_status(Tox *tox, TOX_USERSTATUS status);
/* return the length of friendnumber's status message, including null.
* Pass it into malloc
*/
int tox_get_status_message_size(Tox *tox, int friendnumber);
/* Copy friendnumber's status message into buf, truncating if size is over maxlen.
* Get the size you need to allocate from m_get_statusmessage_size.
* The self variant will copy our own status message.
*
* returns the length of the copied data on success
* retruns -1 on failure.
*/
int tox_get_status_message(Tox *tox, int friendnumber, uint8_t *buf, uint32_t maxlen);
int tox_get_self_status_message(Tox *tox, uint8_t *buf, uint32_t maxlen);
/* return one of USERSTATUS values.
* Values unknown to your application should be represented as USERSTATUS_NONE.
* As above, the self variant will return our own USERSTATUS.
* If friendnumber is invalid, this shall return USERSTATUS_INVALID.
*/
TOX_USERSTATUS tox_get_user_status(Tox *tox, int friendnumber);
TOX_USERSTATUS tox_get_self_user_status(Tox *tox);
/* Set our typing status for a friend.
* You are responsible for turning it on or off.
*
* returns 0 on success.
* returns -1 on failure.
*/
int tox_set_user_is_typing(Tox *tox, int friendnumber, uint8_t is_typing);
/* Get the typing status of a friend.
*
* returns 0 if friend is not typing.
* returns 1 if friend is typing.
*/
int tox_get_is_typing(Tox *tox, int friendnumber);
/* Sets whether we send read receipts for friendnumber.
* This function is not lazy, and it will fail if yesno is not (0 or 1).
*/
void tox_set_sends_receipts(Tox *tox, int friendnumber, int yesno);
/* Return the number of friends in the instance m.
* You should use this to determine how much memory to allocate
* for copy_friendlist. */
uint32_t tox_count_friendlist(Tox *tox);
/* Return the number of online friends in the instance m. */
uint32_t tox_get_num_online_friends(Tox *tox);
/* Copy a list of valid friend IDs into the array out_list.
* If out_list is NULL, returns 0.
* Otherwise, returns the number of elements copied.
* If the array was too small, the contents
* of out_list will be truncated to list_size. */
uint32_t tox_get_friendlist(Tox *tox, int *out_list, uint32_t list_size);
/* Set the function that will be executed when a friend request is received.
* Function format is function(uint8_t * public_key, uint8_t * data, uint16_t length)
*/
void tox_callback_friend_request(Tox *tox, void (*function)(uint8_t *, uint8_t *, uint16_t, void *), void *userdata);
/* Set the function that will be executed when a message from a friend is received.
* Function format is: function(int friendnumber, uint8_t * message, uint32_t length)
*/
void tox_callback_friend_message(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, uint16_t, void *),
void *userdata);
/* Set the function that will be executed when an action from a friend is received.
* Function format is: function(int friendnumber, uint8_t * action, uint32_t length)
*/
void tox_callback_friend_action(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, uint16_t, void *), void *userdata);
/* Set the callback for name changes.
* function(int friendnumber, uint8_t *newname, uint16_t length)
* You are not responsible for freeing newname
*/
void tox_callback_name_change(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, uint16_t, void *),
void *userdata);
/* Set the callback for status message changes.
* function(int friendnumber, uint8_t *newstatus, uint16_t length)
* You are not responsible for freeing newstatus.
*/
void tox_callback_status_message(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, uint16_t, void *),
void *userdata);
/* Set the callback for status type changes.
* function(int friendnumber, USERSTATUS kind)
*/
void tox_callback_user_status(Tox *tox, void (*function)(Tox *tox, int, TOX_USERSTATUS, void *), void *userdata);
/* Set the callback for typing changes.
* function (int friendnumber, uint8_t is_typing)
*/
void tox_callback_typing_change(Tox *tox, void (*function)(Tox *tox, int, uint8_t, void *), void *userdata);
/* Set the callback for read receipts.
* function(int friendnumber, uint32_t receipt)
*
* If you are keeping a record of returns from m_sendmessage;
* receipt might be one of those values, meaning the message
* has been received on the other side.
* Since core doesn't track ids for you, receipt may not correspond to any message.
* In that case, you should discard it.
*/
void tox_callback_read_receipt(Tox *tox, void (*function)(Tox *tox, int, uint32_t, void *), void *userdata);
/* Set the callback for connection status changes.
* function(int friendnumber, uint8_t status)
*
* Status:
* 0 -- friend went offline after being previously online
* 1 -- friend went online
*
* NOTE: This callback is not called when adding friends, thus the "after
* being previously online" part. it's assumed that when adding friends,
* their connection status is offline.
*/
void tox_callback_connection_status(Tox *tox, void (*function)(Tox *tox, int, uint8_t, void *), void *userdata);
/**********GROUP CHAT FUNCTIONS: WARNING WILL BREAK A LOT************/
/* Set the callback for group invites.
*
* Function(Tox *tox, int friendnumber, uint8_t *group_public_key, void *userdata)
*/
void tox_callback_group_invite(Tox *tox, void (*function)(Tox *tox, int, uint8_t *, void *), void *userdata);
/* Set the callback for group messages.
*
* Function(Tox *tox, int groupnumber, int friendgroupnumber, uint8_t * message, uint16_t length, void *userdata)
*/
void tox_callback_group_message(Tox *tox, void (*function)(Tox *tox, int, int, uint8_t *, uint16_t, void *),
void *userdata);
/* Set the callback for group actions.
*
* Function(Tox *tox, int groupnumber, int friendgroupnumber, uint8_t * action, uint16_t length, void *userdata)
*/
void tox_callback_group_action(Tox *tox, void (*function)(Tox *tox, int, int, uint8_t *, uint16_t, void *),
void *userdata);
/* Set callback function for peer name list changes.
*
* It gets called every time the name list changes(new peer/name, deleted peer)
* Function(Tox *tox, int groupnumber, int peernumber, TOX_CHAT_CHANGE change, void *userdata)
*/
typedef enum {
TOX_CHAT_CHANGE_PEER_ADD,
TOX_CHAT_CHANGE_PEER_DEL,
TOX_CHAT_CHANGE_PEER_NAME,
} TOX_CHAT_CHANGE;
void tox_callback_group_namelist_change(Tox *tox, void (*function)(Tox *tox, int, int, uint8_t, void *),
void *userdata);
/* Creates a new groupchat and puts it in the chats array.
*
* return group number on success.
* return -1 on failure.
*/
int tox_add_groupchat(Tox *tox);
/* Delete a groupchat from the chats array.
*
* return 0 on success.
* return -1 if failure.
*/
int tox_del_groupchat(Tox *tox, int groupnumber);
/* Copy the name of peernumber who is in groupnumber to name.
* name must be at least TOX_MAX_NAME_LENGTH long.
*
* return length of name if success
* return -1 if failure
*/
int tox_group_peername(Tox *tox, int groupnumber, int peernumber, uint8_t *name);
/* invite friendnumber to groupnumber
* return 0 on success
* return -1 on failure
*/
int tox_invite_friend(Tox *tox, int friendnumber, int groupnumber);
/* Join a group (you need to have been invited first.)
*
* returns group number on success
* returns -1 on failure.
*/
int tox_join_groupchat(Tox *tox, int friendnumber, uint8_t *friend_group_public_key);
/* send a group message
* return 0 on success
* return -1 on failure
*/
int tox_group_message_send(Tox *tox, int groupnumber, uint8_t *message, uint32_t length);
/* send a group action
* return 0 on success
* return -1 on failure
*/
int tox_group_action_send(Tox *tox, int groupnumber, uint8_t *action, uint32_t length);
/* Return the number of peers in the group chat on success.
* return -1 on failure
*/
int tox_group_number_peers(Tox *tox, int groupnumber);
/* List all the peers in the group chat.
*
* Copies the names of the peers to the name[length][TOX_MAX_NAME_LENGTH] array.
*
* returns the number of peers on success.
*
* return -1 on failure.
*/
int tox_group_get_names(Tox *tox, int groupnumber, uint8_t names[][TOX_MAX_NAME_LENGTH], uint16_t length);
/* Return the number of chats in the instance m.
* You should use this to determine how much memory to allocate
* for copy_chatlist. */
uint32_t tox_count_chatlist(Tox *tox);
/* Copy a list of valid chat IDs into the array out_list.
* If out_list is NULL, returns 0.
* Otherwise, returns the number of elements copied.
* If the array was too small, the contents
* of out_list will be truncated to list_size. */
uint32_t tox_get_chatlist(Tox *tox, int *out_list, uint32_t list_size);
/****************FILE SENDING FUNCTIONS*****************/
/* NOTE: This how to will be updated.
*
* HOW TO SEND FILES CORRECTLY:
* 1. Use tox_new_file_sender(...) to create a new file sender.
* 2. Wait for the callback set with tox_callback_file_control(...) to be called with receive_send == 1 and control_type == TOX_FILECONTROL_ACCEPT
* 3. Send the data with tox_file_send_data(...) with chunk size tox_file_data_size(...)
* 4. When sending is done, send a tox_file_send_control(...) with send_receive = 0 and message_id = TOX_FILECONTROL_FINISHED
*
* HOW TO RECEIVE FILES CORRECTLY:
* 1. wait for the callback set with tox_callback_file_send_request(...)
* 2. accept or refuse the connection with tox_file_send_control(...) with send_receive = 1 and message_id = TOX_FILECONTROL_ACCEPT or TOX_FILECONTROL_KILL
* 3. save all the data received with the callback set with tox_callback_file_data(...) to a file.
* 4. when the callback set with tox_callback_file_control(...) is called with receive_send == 0 and control_type == TOX_FILECONTROL_FINISHED
* the file is done transferring.
*
* tox_file_data_remaining(...) can be used to know how many bytes are left to send/receive.
*
* If the connection breaks during file sending (The other person goes offline without pausing the sending and then comes back)
* the reciever must send a control packet with receive_send == 0 message_id = TOX_FILECONTROL_RESUME_BROKEN and the data being
* a uint64_t (in host byte order) containing the number of bytes recieved.
*
* If the sender recieves this packet, he must send a control packet with receive_send == 1 and control_type == TOX_FILECONTROL_ACCEPT
* then he must start sending file data from the position (data , uint64_t in host byte order) recieved in the TOX_FILECONTROL_RESUME_BROKEN packet.
*
* More to come...
*/
enum {
TOX_FILECONTROL_ACCEPT,
TOX_FILECONTROL_PAUSE,
TOX_FILECONTROL_KILL,
TOX_FILECONTROL_FINISHED,
TOX_FILECONTROL_RESUME_BROKEN
};
/* Set the callback for file send requests.
*
* Function(Tox *tox, int friendnumber, uint8_t filenumber, uint64_t filesize, uint8_t *filename, uint16_t filename_length, void *userdata)
*/
void tox_callback_file_send_request(Tox *tox, void (*function)(Tox *m, int, uint8_t, uint64_t, uint8_t *, uint16_t,
void *), void *userdata);
/* Set the callback for file control requests.
*
* receive_send is 1 if the message is for a slot on which we are currently sending a file and 0 if the message
* is for a slot on which we are receiving the file
*
* Function(Tox *tox, int friendnumber, uint8_t receive_send, uint8_t filenumber, uint8_t control_type, uint8_t *data, uint16_t length, void *userdata)
*
*/
void tox_callback_file_control(Tox *tox, void (*function)(Tox *m, int, uint8_t, uint8_t, uint8_t, uint8_t *,
uint16_t, void *), void *userdata);
/* Set the callback for file data.
*
* Function(Tox *tox, int friendnumber, uint8_t filenumber, uint8_t *data, uint16_t length, void *userdata)
*
*/
void tox_callback_file_data(Tox *tox, void (*function)(Tox *m, int, uint8_t, uint8_t *, uint16_t length, void *),
void *userdata);
/* Send a file send request.
* Maximum filename length is 255 bytes.
* return file number on success
* return -1 on failure
*/
int tox_new_file_sender(Tox *tox, int friendnumber, uint64_t filesize, uint8_t *filename, uint16_t filename_length);
/* Send a file control request.
*
* send_receive is 0 if we want the control packet to target a file we are currently sending,
* 1 if it targets a file we are currently receiving.
*
* return 0 on success
* return -1 on failure
*/
int tox_file_send_control(Tox *tox, int friendnumber, uint8_t send_receive, uint8_t filenumber, uint8_t message_id,
uint8_t *data, uint16_t length);
/* Send file data.
*
* return 0 on success
* return -1 on failure
*/
int tox_file_send_data(Tox *tox, int friendnumber, uint8_t filenumber, uint8_t *data, uint16_t length);
/* Returns the recommended/maximum size of the filedata you send with tox_file_send_data()
*
* return size on success
* return -1 on failure (currently will never return -1)
*/
int tox_file_data_size(Tox *tox, int friendnumber);
/* Give the number of bytes left to be sent/received.
*
* send_receive is 0 if we want the sending files, 1 if we want the receiving.
*
* return number of bytes remaining to be sent/received on success
* return 0 on failure
*/
uint64_t tox_file_data_remaining(Tox *tox, int friendnumber, uint8_t filenumber, uint8_t send_receive);
/***************END OF FILE SENDING FUNCTIONS******************/
/*
* Use these two functions to bootstrap the client.
*/
/* Sends a "get nodes" request to the given node with ip, port and public_key
* to setup connections
*/
void tox_bootstrap_from_ip(Tox *tox, tox_IP_Port ip_port, uint8_t *public_key);
/* Resolves address into an IP address. If successful, sends a "get nodes"
* request to the given node with ip, port (in network byte order, HINT: use htons())
* and public_key to setup connections
*
* address can be a hostname or an IP address (IPv4 or IPv6).
* if ipv6enabled is 0 (zero), the resolving sticks STRICTLY to IPv4 addresses
* if ipv6enabled is not 0 (zero), the resolving looks for IPv6 addresses first,
* then IPv4 addresses.
*
* returns 1 if the address could be converted into an IP address
* returns 0 otherwise
*/
int tox_bootstrap_from_address(Tox *tox, const char *address, uint8_t ipv6enabled,
uint16_t port, uint8_t *public_key);
/* return 0 if we are not connected to the DHT.
* return 1 if we are.
*/
int tox_isconnected(Tox *tox);
/*
* Run this function at startup.
*
* Initializes a tox structure
* The type of communication socket depends on ipv6enabled:
* If set to 0 (zero), creates an IPv4 socket which subsequently only allows
* IPv4 communication
* If set to anything else, creates an IPv6 socket which allows both IPv4 AND
* IPv6 communication
*
* return allocated instance of tox on success.
* return 0 if there are problems.
*/
Tox *tox_new(uint8_t ipv6enabled);
/* Run this before closing shop.
* Free all datastructures. */
void tox_kill(Tox *tox);
/* The main loop that needs to be run at least 20 times per second. */
void tox_do(Tox *tox);
/*
* tox_wait_prepare(): function should be called under lock
* Prepares the data required to call tox_wait_execute() asynchronously
*
* data[] is reserved and kept by the caller
* *lenptr is in/out: in = reserved data[], out = required data[]
*
* returns 1 on success
* returns 0 if *lenptr is insufficient
* returns -1 if lenptr is NULL
*
*
* tox_wait_execute(): function can be called asynchronously
* Waits for something to happen on the socket for up to milliseconds milliseconds.
* *** Function MUSTN'T poll. ***
* The function mustn't modify anything at all, so it can be called completely
* asynchronously without any worry.
*
* returns 1 if there is socket activity (i.e. tox_do() should be called)
* returns 0 if the timeout was reached
* returns -1 if data was NULL or len too short
*
*
* tox_wait_cleanup(): function should be called under lock
* Stores results from tox_wait_execute().
*
* data[]/len shall be the exact same as given to tox_wait_execute()
*
*/
int tox_wait_prepare(Tox *tox, uint8_t *data, uint16_t *lenptr);
int tox_wait_execute(Tox *tox, uint8_t *data, uint16_t len, uint16_t milliseconds);
void tox_wait_cleanup(Tox *tox, uint8_t *data, uint16_t len);
/* SAVING AND LOADING FUNCTIONS: */
/* return size of messenger data (for saving). */
uint32_t tox_size(Tox *tox);
/* Save the messenger in data (must be allocated memory of size Messenger_size()). */
void tox_save(Tox *tox, uint8_t *data);
/* Load the messenger from data of size length.
*
* returns 0 on success
* returns -1 on failure
*/
int tox_load(Tox *tox, uint8_t *data, uint32_t length);
/**/
/* return the size of data to pass to messenger_save_encrypted(...)
*/
uint32_t tox_size_encrypted(Tox *tox);
/* Save the messenger, encrypting the data with key of length key_length
*
* This functions simply calls and then encrypt the output of tox_save(..)
* with crypto_secretbox(...) from NaCl/libsodium with the key
* given to crypto_secretbox(...) being the SHA256 sum of the key
* passed to this function.
*
* return 0 on success.
* return -1 on failure.
*/
int tox_save_encrypted(Tox *tox, uint8_t *data, uint8_t *key, uint16_t key_length);
/* Load the messenger from data of size length encrypted with key of key_length.
*
* return 0 on success.
* return -1 on failure.
*/
int tox_load_encrypted(Tox *tox, uint8_t *data, uint32_t length, uint8_t *key, uint16_t key_length);
#ifdef __cplusplus
}
#endif
#endif