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Replace DNS-based username lookups with HTTPS & drop utox.org support

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Jfreegman 2015-10-28 17:14:17 -04:00
parent f7e48d294e
commit 8584feab80
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GPG Key ID: 3627F3144076AE63
14 changed files with 452 additions and 437 deletions
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25
INSTALL.md
View File

@ -9,17 +9,18 @@
<a name="deps" />
## Dependencies
| Name | Needed by | Debian package |
|------------------------------------------------------|----------------------------|------------------|
| [Tox Core](https://github.com/irungentoo/toxcore) | BASE | *None* |
| [NCurses](https://www.gnu.org/software/ncurses) | BASE | libncursesw5-dev |
| [LibConfig](http://www.hyperrealm.com/libconfig) | BASE | libconfig-dev |
| [GNUmake](https://www.gnu.org/software/make) | BASE | make |
| [Tox Core AV](https://github.com/irungentoo/toxcore) | AUDIO | *None* |
| [OpenAL](http://openal.org) | AUDIO, SOUND NOTIFICATIONS | libopenal-dev |
| [OpenALUT](http://openal.org) | SOUND NOTIFICATIONS | libalut-dev |
| [LibNotify](https://developer.gnome.org/libnotify) | DESKTOP NOTIFICATIONS | libnotify-dev |
| [AsciiDoc](http://asciidoc.org/index.html) | DOCUMENTATION<sup>1</sup> | asciidoc |
| Name | Needed by | Debian package |
|------------------------------------------------------|----------------------------|---------------------|
| [Tox Core](https://github.com/irungentoo/toxcore) | BASE | *None* |
| [NCurses](https://www.gnu.org/software/ncurses) | BASE | libncursesw5-dev |
| [LibConfig](http://www.hyperrealm.com/libconfig) | BASE | libconfig-dev |
| [GNUmake](https://www.gnu.org/software/make) | BASE | make |
| [libcurl](http://curl.haxx.se/) | BASE | libcurl4-openssl-dev|
| [Tox Core AV](https://github.com/irungentoo/toxcore) | AUDIO | *None* |
| [OpenAL](http://openal.org) | AUDIO, SOUND NOTIFICATIONS | libopenal-dev |
| [OpenALUT](http://openal.org) | SOUND NOTIFICATIONS | libalut-dev |
| [LibNotify](https://developer.gnome.org/libnotify) | DESKTOP NOTIFICATIONS | libnotify-dev |
| [AsciiDoc](http://asciidoc.org/index.html) | DOCUMENTATION<sup>1</sup> | asciidoc |
<sup>1</sup>: see [Documentation](#docs)
<a name="deps_osx" />
@ -31,7 +32,7 @@ brew install https://raw.githubusercontent.com/Tox/homebrew-tox/master/Formula/l
brew install https://raw.githubusercontent.com/Homebrew/homebrew-x11/master/libnotify.rb
```
You can omit `libnotify` if you intend to build without desktop notifications enabled.
You can omit `libnotify` if you intend to build without desktop notifications enabled.
<a name="Compiling">
## Compiling

4
Makefile
View File

@ -11,10 +11,10 @@ CFLAGS += '-DPACKAGE_DATADIR="$(abspath $(DATADIR))"'
CFLAGS += $(USER_CFLAGS)
LDFLAGS = $(USER_LDFLAGS)
OBJ = chat.o chat_commands.o configdir.o dns.o execute.o file_transfers.o notify.o
OBJ = chat.o chat_commands.o configdir.o execute.o file_transfers.o notify.o
OBJ += friendlist.o global_commands.o groupchat.o line_info.o input.o help.o autocomplete.o
OBJ += log.o misc_tools.o prompt.o settings.o toxic.o toxic_strings.o windows.o message_queue.o
OBJ += group_commands.o term_mplex.o avatars.o
OBJ += group_commands.o term_mplex.o avatars.o name_lookup.o
# Check on wich system we are running
UNAME_S = $(shell uname -s)

2
cfg/global_vars.mk
View File

@ -16,7 +16,7 @@ MISC_DIR = $(BASE_DIR)/misc
# Project files
MANFILES = toxic.1 toxic.conf.5
DATAFILES = DHTnodes DNSservers toxic.conf.example
DATAFILES = DHTnodes nameservers toxic.conf.example
DESKFILE = toxic.desktop
SNDFILES = ToxicContactOnline.wav ToxicContactOffline.wav ToxicError.wav
SNDFILES += ToxicRecvMessage.wav ToxicOutgoingCall.wav ToxicIncomingCall.wav

2
cfg/systems/Darwin.mk
View File

@ -6,5 +6,5 @@ PKG_CONFIG_PATH = $(shell export PKG_CONFIG_PATH=/usr/lib/pkgconfig:/usr/local/o
LIBS := $(filter-out ncursesw, $(LIBS))
# OS X ships a usable, recent version of ncurses, but calls it ncurses not ncursesw.
LDFLAGS += -lncurses -lalut -ltoxav -ltoxcore -ltoxdns -lresolv -lconfig -ltoxencryptsave -g
LDFLAGS += -lncurses -lalut -ltoxav -ltoxcore -lcurl -lconfig -ltoxencryptsave -g
CFLAGS += -I/usr/local/opt/freealut/include/AL -I/usr/local/opt/glib/include/glib-2.0 -g

2
cfg/systems/Linux.mk
View File

@ -1,4 +1,4 @@
# Specials options for linux systems
CFLAGS +=
LDFLAGS += -ldl -lresolv -lrt
LDFLAGS += -ldl -lrt -lcurl
MANDIR = $(PREFIX)/share/man

8
doc/toxic.1
View File

@ -2,12 +2,12 @@
.\" Title: toxic
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\" Date: 2015-03-28
.\" Date: 2015-07-08
.\" Manual: Toxic Manual
.\" Source: toxic __VERSION__
.\" Language: English
.\"
.TH "TOXIC" "1" "2015\-03\-28" "toxic __VERSION__" "Toxic Manual"
.TH "TOXIC" "1" "2015\-07\-08" "toxic __VERSION__" "Toxic Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
@ -101,9 +101,9 @@ Use a SOCKS5 proxy: Requires [IP] [port]
Use a HTTP proxy: Requires [IP] [port]
.RE
.PP
\-r, \-\-dnslist
\-r, \-\-namelist
.RS 4
Use specified DNSservers file
Use specified nameservers list
.RE
.PP
\-t, \-\-force\-tcp

4
doc/toxic.1.asc
View File

@ -53,8 +53,8 @@ OPTIONS
-P, --HTTP-proxy::
Use a HTTP proxy: Requires [IP] [port]
-r, --dnslist::
Use specified DNSservers file
-r, --namelist::
Use specified nameservers list
-t, --force-tcp::
Force TCP connection (use this with proxies)

1
misc/DNSservers → misc/nameservers
View File

@ -1,3 +1,2 @@
utox.org d3154f65d28a5b41a05d4ac7e4b39c6b1c233cc857fb365c56e8392737462a12
toxme.io 1A39E7A5D5FA9CF155C751570A32E625698A60A55F6D88028F949F66144F4F25

391
src/dns.c
View File

@ -1,391 +0,0 @@
/* dns.c
*
*
* Copyright (C) 2014 Toxic All Rights Reserved.
*
* This file is part of Toxic.
*
* Toxic 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.
*
* Toxic 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 Toxic. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h> /* for u_char */
#include <netinet/in.h>
#include <resolv.h>
#ifdef __APPLE__
#include <arpa/nameser_compat.h>
#else
#include <arpa/nameser.h>
#endif /* ifdef __APPLE__ */
#include <tox/toxdns.h>
#include "toxic.h"
#include "windows.h"
#include "line_info.h"
#include "dns.h"
#include "global_commands.h"
#include "misc_tools.h"
#include "configdir.h"
#define DNS3_KEY_SIZE 32
#define MAX_DNS_REQST_SIZE 255
#define TOX_DNS3_TXT_PREFIX "v=tox3;id="
extern struct Winthread Winthread;
extern struct dns3_servers dns3_servers;
extern struct arg_opts arg_opts;
static struct thread_data {
ToxWindow *self;
char id_bin[TOX_ADDRESS_SIZE];
char addr[MAX_STR_SIZE];
char msg[MAX_STR_SIZE];
uint8_t busy;
Tox *m;
} t_data;
static struct dns_thread {
pthread_t tid;
pthread_attr_t attr;
} dns_thread;
#define MAX_DNS_SERVERS 50
#define MAX_DOMAIN_SIZE 32
#define MAX_DNS_LINE MAX_DOMAIN_SIZE + (DNS3_KEY_SIZE * 2) + 3
struct dns3_servers {
bool loaded;
int lines;
char names[MAX_DNS_SERVERS][MAX_DOMAIN_SIZE];
char keys[MAX_DNS_SERVERS][DNS3_KEY_SIZE];
} dns3_servers;
static int load_dns_domainlist(const char *path)
{
FILE *fp = fopen(path, "r");
if (fp == NULL)
return -1;
char line[MAX_DNS_LINE];
while (fgets(line, sizeof(line), fp) && dns3_servers.lines < MAX_DNS_SERVERS) {
int linelen = strlen(line);
if (linelen < DNS3_KEY_SIZE * 2 + 5)
continue;
if (line[linelen - 1] == '\n')
line[--linelen] = '\0';
const char *name = strtok(line, " ");
const char *keystr = strtok(NULL, " ");
if (name == NULL || keystr == NULL)
continue;
if (strlen(keystr) != DNS3_KEY_SIZE * 2)
continue;
snprintf(dns3_servers.names[dns3_servers.lines], sizeof(dns3_servers.names[dns3_servers.lines]), "%s", name);
int res = hex_string_to_bytes(dns3_servers.keys[dns3_servers.lines], DNS3_KEY_SIZE, keystr);
if (res == -1)
continue;
++dns3_servers.lines;
}
fclose(fp);
if (dns3_servers.lines < 1)
return -2;
return 0;
}
static int dns_error(ToxWindow *self, const char *errmsg)
{
pthread_mutex_lock(&Winthread.lock);
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "User lookup failed: %s", errmsg);
pthread_mutex_unlock(&Winthread.lock);
return -1;
}
static void killdns_thread(void *dns_obj)
{
if (dns_obj)
tox_dns3_kill(dns_obj);
memset(&t_data, 0, sizeof(struct thread_data));
pthread_attr_destroy(&dns_thread.attr);
pthread_exit(NULL);
}
/* puts TXT from dns response in buf. Returns length of TXT on success, -1 on fail.*/
static int parse_dns_response(ToxWindow *self, u_char *answer, int ans_len, char *buf)
{
uint8_t *ans_pt = answer + sizeof(HEADER);
uint8_t *ans_end = answer + ans_len;
char exp_ans[PACKETSZ];
int len = dn_expand(answer, ans_end, ans_pt, exp_ans, sizeof(exp_ans));
if (len == -1)
return dns_error(self, "dn_expand failed.");
ans_pt += len;
if (ans_pt > ans_end - 4)
return dns_error(self, "DNS reply was too short.");
int type;
GETSHORT(type, ans_pt);
if (type != T_TXT)
return dns_error(self, "Broken DNS reply.");
ans_pt += INT16SZ; /* class */
uint32_t size = 0;
/* recurse through CNAME rr's */
do {
ans_pt += size;
len = dn_expand(answer, ans_end, ans_pt, exp_ans, sizeof(exp_ans));
if (len == -1)
return dns_error(self, "Second dn_expand failed.");
ans_pt += len;
if (ans_pt > ans_end - 10)
return dns_error(self, "DNS reply was too short.");
GETSHORT(type, ans_pt);
ans_pt += INT16SZ;
ans_pt += 4;
GETSHORT(size, ans_pt);
if (ans_pt + size < answer || ans_pt + size > ans_end)
return dns_error(self, "RR overflow.");
} while (type == T_CNAME);
if (type != T_TXT)
return dns_error(self, "DNS response failed.");
uint32_t txt_len = *ans_pt;
if (!size || txt_len >= size || !txt_len)
return dns_error(self, "No record found.");
if (txt_len > MAX_DNS_REQST_SIZE)
return dns_error(self, "Invalid DNS response.");
ans_pt++;
ans_pt[txt_len] = '\0';
memcpy(buf, ans_pt, txt_len + 1);
return txt_len;
}
/* Takes address addr in the form "username@domain", puts the username in namebuf,
and the domain in dombuf.
return length of username on success, -1 on failure */
static int parse_addr(const char *addr, char *namebuf, size_t namebuf_sz, char *dombuf, size_t dombuf_sz)
{
if (strlen(addr) >= MAX_STR_SIZE)
return -1;
char tmpaddr[MAX_STR_SIZE];
char *tmpname = NULL;
char *tmpdom = NULL;
snprintf(tmpaddr, sizeof(tmpaddr), "%s", addr);
tmpname = strtok(tmpaddr, "@");
tmpdom = strtok(NULL, "");
if (tmpname == NULL || tmpdom == NULL)
return -1;
str_to_lower(tmpdom);
snprintf(namebuf, namebuf_sz, "%s", tmpname);
snprintf(dombuf, dombuf_sz, "%s", tmpdom);
return strlen(namebuf);
}
/* matches input domain name with domains in list and obtains key. Return 0 on success, -1 on failure */
static int get_domain_match(char *pubkey, char *domain, const char *inputdomain)
{
int i;
for (i = 0; i < dns3_servers.lines; ++i) {
if (strcmp(dns3_servers.names[i], inputdomain) == 0) {
memcpy(pubkey, dns3_servers.keys[i], DNS3_KEY_SIZE);
snprintf(domain, MAX_DOMAIN_SIZE, "%s", dns3_servers.names[i]);
return 0;
}
}
return -1;
}
/* Does DNS lookup for addr and puts resulting tox id in id_bin. */
void *dns3_lookup_thread(void *data)
{
ToxWindow *self = t_data.self;
char inputdomain[MAX_STR_SIZE];
char name[MAX_STR_SIZE];
int namelen = parse_addr(t_data.addr, name, sizeof(name), inputdomain, sizeof(inputdomain));
if (namelen == -1) {
dns_error(self, "Must be a Tox ID or an address in the form username@domain");
killdns_thread(NULL);
}
char DNS_pubkey[DNS3_KEY_SIZE];
char domain[MAX_DOMAIN_SIZE];
int match = get_domain_match(DNS_pubkey, domain, inputdomain);
if (match == -1) {
dns_error(self, "Domain not found.");
killdns_thread(NULL);
}
void *dns_obj = tox_dns3_new((uint8_t *) DNS_pubkey);
if (dns_obj == NULL) {
dns_error(self, "Core failed to create DNS object.");
killdns_thread(NULL);
}
char string[MAX_DNS_REQST_SIZE + 1];
uint32_t request_id;
int str_len = tox_generate_dns3_string(dns_obj, (uint8_t *) string, sizeof(string), &request_id,
(uint8_t *) name, namelen);
if (str_len == -1) {
dns_error(self, "Core failed to generate DNS3 string.");
killdns_thread(dns_obj);
}
string[str_len] = '\0';
u_char answer[PACKETSZ];
char d_string[MAX_DOMAIN_SIZE + MAX_DNS_REQST_SIZE + 10];
/* format string and create dns query */
snprintf(d_string, sizeof(d_string), "_%s._tox.%s", string, domain);
int ans_len = res_query(d_string, C_IN, T_TXT, answer, sizeof(answer));
if (ans_len <= 0) {
dns_error(self, "DNS query failed.");
killdns_thread(dns_obj);
}
char ans_id[MAX_DNS_REQST_SIZE + 1];
/* extract TXT from DNS response */
if (parse_dns_response(self, answer, ans_len, ans_id) == -1)
killdns_thread(dns_obj);
char encrypted_id[MAX_DNS_REQST_SIZE + 1];
int prfx_len = strlen(TOX_DNS3_TXT_PREFIX);
/* extract the encrypted ID from TXT response */
if (strncmp(ans_id, TOX_DNS3_TXT_PREFIX, prfx_len) != 0) {
dns_error(self, "Bad DNS3 TXT response.");
killdns_thread(dns_obj);
}
memcpy(encrypted_id, ans_id + prfx_len, ans_len - prfx_len);
if (tox_decrypt_dns3_TXT(dns_obj, (uint8_t *) t_data.id_bin, (uint8_t *) encrypted_id,
strlen(encrypted_id), request_id) == -1) {
dns_error(self, "Core failed to decrypt DNS response.");
killdns_thread(dns_obj);
}
pthread_mutex_lock(&Winthread.lock);
cmd_add_helper(self, t_data.m, t_data.id_bin, t_data.msg);
pthread_mutex_unlock(&Winthread.lock);
killdns_thread(dns_obj);
return 0;
}
/* creates new thread for dns3 lookup. Only allows one lookup at a time. */
void dns3_lookup(ToxWindow *self, Tox *m, const char *id_bin, const char *addr, const char *msg)
{
if (arg_opts.proxy_type != TOX_PROXY_TYPE_NONE && arg_opts.force_tcp) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "DNS lookups are disabled.");
return;
}
if (t_data.busy) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Please wait for previous user lookup to finish.");
return;
}
if (!dns3_servers.loaded) {
const char *path = arg_opts.dns_path[0] ? arg_opts.dns_path : PACKAGE_DATADIR "/DNSservers";
dns3_servers.loaded = true;
int ret = load_dns_domainlist(path);
if (ret < 0) {
const char *errmsg = "DNS server list failed to load with error code %d. Falling back to hard-coded list.";
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, errmsg, ret);
}
}
snprintf(t_data.id_bin, sizeof(t_data.id_bin), "%s", id_bin);
snprintf(t_data.addr, sizeof(t_data.addr), "%s", addr);
snprintf(t_data.msg, sizeof(t_data.msg), "%s", msg);
t_data.self = self;
t_data.m = m;
t_data.busy = 1;
if (pthread_attr_init(&dns_thread.attr) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: DNS thread attr failed to init");
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
if (pthread_attr_setdetachstate(&dns_thread.attr, PTHREAD_CREATE_DETACHED) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: DNS thread attr failed to set");
pthread_attr_destroy(&dns_thread.attr);
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
if (pthread_create(&dns_thread.tid, &dns_thread.attr, dns3_lookup_thread, NULL) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: DNS thread failed to init");
pthread_attr_destroy(&dns_thread.attr);
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
}

6
src/global_commands.c
View File

@ -30,12 +30,12 @@
#include "friendlist.h"
#include "log.h"
#include "line_info.h"
#include "dns.h"
#include "groupchat.h"
#include "prompt.h"
#include "help.h"
#include "term_mplex.h"
#include "avatars.h"
#include "name_lookup.h"
extern char *DATA_FILE;
extern ToxWindow *prompt;
@ -192,8 +192,8 @@ void cmd_add(WINDOW *window, ToxWindow *self, Tox *m, int argc, char (*argv)[MAX
}
cmd_add_helper(self, m, id_bin, msg);
} else { /* assume id is a username@domain address and do DNS lookup */
dns3_lookup(self, m, id_bin, id, msg);
} else { /* assume id is a username@domain address and do http name server lookup */
name_lookup(self, m, id_bin, id, msg);
}
}

391
src/name_lookup.c Normal file
View File

@ -0,0 +1,391 @@
/* name_lookup.c
*
*
* Copyright (C) 2015 Toxic All Rights Reserved.
*
* This file is part of Toxic.
*
* Toxic 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.
*
* Toxic 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 Toxic. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <string.h>
#include <sys/types.h> /* for u_char */
#include <curl/curl.h>
#include "toxic.h"
#include "windows.h"
#include "line_info.h"
#include "global_commands.h"
#include "misc_tools.h"
#include "configdir.h"
extern struct arg_opts arg_opts;
extern struct Winthread Winthread;;
#define NAMESERVER_API_PATH "api"
#define SERVER_KEY_SIZE 32
#define MAX_SERVERS 50
#define MAX_DOMAIN_SIZE 32
#define MAX_SERVER_LINE MAX_DOMAIN_SIZE + (SERVER_KEY_SIZE * 2) + 3
struct Nameservers {
int lines;
char names[MAX_SERVERS][MAX_DOMAIN_SIZE];
char keys[MAX_SERVERS][SERVER_KEY_SIZE];
} Nameservers;
static struct thread_data {
Tox *m;
ToxWindow *self;
char id_bin[TOX_ADDRESS_SIZE];
char addr[MAX_STR_SIZE];
char msg[MAX_STR_SIZE];
bool busy;
bool disabled;
} t_data;
static struct lookup_thread {
pthread_t tid;
pthread_attr_t attr;
} lookup_thread;
static int lookup_error(ToxWindow *self, const char *errmsg)
{
pthread_mutex_lock(&Winthread.lock);
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "name lookup failed: %s", errmsg);
pthread_mutex_unlock(&Winthread.lock);
return -1;
}
static void kill_lookup_thread(void)
{
memset(&t_data, 0, sizeof(struct thread_data));
pthread_attr_destroy(&lookup_thread.attr);
pthread_exit(NULL);
}
/* Attempts to load the nameserver list pointed at by path into the Nameservers structure.
*
* Returns 0 on success.
* -1 is reserved.
* Returns -2 if the supplied path does not exist.
* Returns -3 if the list does not contain any valid entries.
*/
static int load_nameserver_list(const char *path)
{
FILE *fp = fopen(path, "r");
if (fp == NULL)
return -2;
char line[MAX_SERVER_LINE];
while (fgets(line, sizeof(line), fp) && Nameservers.lines < MAX_SERVERS) {
int linelen = strlen(line);
if (linelen < SERVER_KEY_SIZE * 2 + 5)
continue;
if (line[linelen - 1] == '\n')
line[--linelen] = '\0';
const char *name = strtok(line, " ");
const char *keystr = strtok(NULL, " ");
if (name == NULL || keystr == NULL)
continue;
if (strlen(keystr) != SERVER_KEY_SIZE * 2)
continue;
snprintf(Nameservers.names[Nameservers.lines], sizeof(Nameservers.names[Nameservers.lines]), "%s", name);
int res = hex_string_to_bytes(Nameservers.keys[Nameservers.lines], SERVER_KEY_SIZE, keystr);
if (res == -1)
continue;
++Nameservers.lines;
}
fclose(fp);
if (Nameservers.lines < 1)
return -3;
return 0;
}
/* Takes address addr in the form "username@domain", puts the username in namebuf,
* and the domain in dombuf.
*
* Returns 0 on success.
* Returns -1 on failure
*/
static int parse_addr(const char *addr, char *namebuf, size_t namebuf_sz, char *dombuf, size_t dombuf_sz)
{
if (strlen(addr) >= (MAX_STR_SIZE - strlen(NAMESERVER_API_PATH)))
return -1;
char tmpaddr[MAX_STR_SIZE];
char *tmpname = NULL;
char *tmpdom = NULL;
snprintf(tmpaddr, sizeof(tmpaddr), "%s", addr);
tmpname = strtok(tmpaddr, "@");
tmpdom = strtok(NULL, "");
if (tmpname == NULL || tmpdom == NULL)
return -1;
str_to_lower(tmpdom);
snprintf(namebuf, namebuf_sz, "%s", tmpname);
snprintf(dombuf, dombuf_sz, "%s", tmpdom);
return 0;
}
/* matches input domain name with domains in list and obtains key.
* Turns out_domain into the full domain we need to make a POST request.
*
* Return true on match.
* Returns false on no match.
*/
static bool get_domain_match(char *pubkey, char *out_domain, size_t out_domain_size, const char *inputdomain)
{
int i;
for (i = 0; i < Nameservers.lines; ++i) {
if (strcmp(Nameservers.names[i], inputdomain) == 0) {
memcpy(pubkey, Nameservers.keys[i], SERVER_KEY_SIZE);
snprintf(out_domain, out_domain_size, "https://%s/%s", Nameservers.names[i], NAMESERVER_API_PATH);
return true;
}
}
return false;
}
#define MAX_RECV_LOOKUP_DATA_SIZE 1024
/* Holds raw data received from name server */
struct Recv_Data {
char data[MAX_RECV_LOOKUP_DATA_SIZE];
size_t size;
};
size_t write_lookup_data(void *data, size_t size, size_t nmemb, void *user_pointer)
{
struct Recv_Data *recv_data = (struct Recv_Data *) user_pointer;
size_t real_size = size * nmemb;
if (real_size > MAX_RECV_LOOKUP_DATA_SIZE)
return 0;
memcpy(&recv_data->data, data, real_size);
recv_data->size = real_size;
recv_data->data[real_size] = 0;
return real_size;
}
/* Converts Tox ID string contained in recv_data to binary format and puts it in thread's ID buffer.
*
* Returns 0 on success.
* Returns -1 on failure.
*/
#define ID_PREFIX "\"tox_id\": \""
static int process_response(struct Recv_Data *recv_data)
{
size_t prefix_size = strlen(ID_PREFIX);
if (recv_data->size < TOX_ADDRESS_SIZE * 2 + prefix_size)
return -1;
const char *IDstart = strstr(recv_data->data, ID_PREFIX);
if (IDstart == NULL)
return -1;
if (strlen(IDstart) < TOX_ADDRESS_SIZE * 2 + prefix_size)
return -1;
char ID_string[TOX_ADDRESS_SIZE * 2 + 1];
memcpy(ID_string, IDstart + prefix_size, TOX_ADDRESS_SIZE * 2);
ID_string[TOX_ADDRESS_SIZE * 2] = 0;
if (hex_string_to_bin(ID_string, strlen(ID_string), t_data.id_bin, sizeof(t_data.id_bin)) == -1)
return -1;
return 0;
}
void *lookup_thread_func(void *data)
{
ToxWindow *self = t_data.self;
char input_domain[MAX_STR_SIZE];
char name[MAX_STR_SIZE];
if (parse_addr(t_data.addr, name, sizeof(name), input_domain, sizeof(input_domain)) == -1) {
lookup_error(self, "Input must be a 76 character Tox ID or an address in the form: username@domain");
kill_lookup_thread();
}
char nameserver_key[SERVER_KEY_SIZE];
char real_domain[MAX_DOMAIN_SIZE];
if (!get_domain_match(nameserver_key, real_domain, sizeof(real_domain), input_domain)) {
if (!strcasecmp(input_domain, "utox.org"))
lookup_error(self, "utox.org uses deprecated DNS-based lookups and is no longer supported by Toxic");
else
lookup_error(self, "Name server domain not found.");
kill_lookup_thread();
}
CURL *c_handle = curl_easy_init();
if (!c_handle) {
lookup_error(self, "curl handler error");
kill_lookup_thread();
}
struct Recv_Data recv_data;
memset(&recv_data, 0, sizeof(struct Recv_Data));
char post_data[MAX_STR_SIZE];
snprintf(post_data, sizeof(post_data), "{\"action\": 3, \"name\": \"%s\"}", name);
struct curl_slist *headers = NULL;
headers = curl_slist_append(headers, "Content-Type: application/json");
headers = curl_slist_append(headers, "charsets: utf-8");
curl_easy_setopt(c_handle, CURLOPT_HTTPHEADER, headers);
curl_easy_setopt(c_handle, CURLOPT_URL, real_domain);
curl_easy_setopt(c_handle, CURLOPT_WRITEFUNCTION, write_lookup_data);
curl_easy_setopt(c_handle, CURLOPT_WRITEDATA, (void *) &recv_data);
curl_easy_setopt(c_handle, CURLOPT_USERAGENT, "libcurl-agent/1.0");
curl_easy_setopt(c_handle, CURLOPT_POSTFIELDS, post_data);
if (curl_easy_setopt(c_handle, CURLOPT_USE_SSL, CURLUSESSL_ALL) != CURLE_OK) {
lookup_error(self, "Failed to enable TLS.");
goto on_exit;
}
if (curl_easy_setopt(c_handle, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2) != CURLE_OK) {
lookup_error(self, "TLSv1.2 could not be set.");
goto on_exit;
}
if (curl_easy_perform(c_handle) != CURLE_OK) {
lookup_error(self, "curl lookup error.");
goto on_exit;
}
if (process_response(&recv_data) == -1) {
lookup_error(self, "parsing error.");
goto on_exit;
}
pthread_mutex_lock(&Winthread.lock);
cmd_add_helper(self, t_data.m, t_data.id_bin, t_data.msg);
pthread_mutex_unlock(&Winthread.lock);
on_exit:
curl_slist_free_all(headers);
curl_easy_cleanup(c_handle);
kill_lookup_thread();
return 0;
}
void name_lookup(ToxWindow *self, Tox *m, const char *id_bin, const char *addr, const char *message)
{
if (t_data.disabled) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "name lookups are disabled.");
return;
}
if (arg_opts.proxy_type != TOX_PROXY_TYPE_NONE && arg_opts.force_tcp) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "name lookups are disabled.");
return;
}
if (t_data.busy) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, 0, "Please wait for previous name lookup to finish.");
return;
}
snprintf(t_data.id_bin, sizeof(t_data.id_bin), "%s", id_bin);
snprintf(t_data.addr, sizeof(t_data.addr), "%s", addr);
snprintf(t_data.msg, sizeof(t_data.msg), "%s", message);
t_data.self = self;
t_data.m = m;
t_data.busy = true;
if (pthread_attr_init(&lookup_thread.attr) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: lookup thread attr failed to init");
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
if (pthread_attr_setdetachstate(&lookup_thread.attr, PTHREAD_CREATE_DETACHED) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: lookup thread attr failed to set");
pthread_attr_destroy(&lookup_thread.attr);
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
if (pthread_create(&lookup_thread.tid, &lookup_thread.attr, lookup_thread_func, NULL) != 0) {
line_info_add(self, NULL, NULL, NULL, SYS_MSG, 0, RED, "Error: lookup thread failed to init");
pthread_attr_destroy(&lookup_thread.attr);
memset(&t_data, 0, sizeof(struct thread_data));
return;
}
}
/* Initializes http based name lookups. Note: This function must be called only once before additional
* threads are spawned.
*
* Returns 0 on success.
* Returns -1 if curl failed to init.
* Returns -2 if the nameserver list cannot be found.
* Returns -3 if the nameserver list does not contain any valid entries.
*/
int name_lookup_init(void)
{
if (curl_global_init(CURL_GLOBAL_ALL) != 0) {
t_data.disabled = true;
return -1;
}
const char *path = arg_opts.nameserver_path[0] ? arg_opts.nameserver_path : PACKAGE_DATADIR "/nameservers";
int ret = load_nameserver_list(path);
if (ret != 0) {
t_data.disabled = true;
return ret;
}
return 0;
}
void name_lookup_cleanup(void)
{
curl_global_cleanup();
}

23
src/dns.h → src/name_lookup.h
View File

@ -1,7 +1,7 @@
/* dns.c
/* name_lookup.h
*
*
* Copyright (C) 2014 Toxic All Rights Reserved.
* Copyright (C) 2015 Toxic All Rights Reserved.
*
* This file is part of Toxic.
*
@ -20,13 +20,18 @@
*
*/
/* Does DNS lookup for addr and puts resulting tox id in id_bin.
Return 0 on success, -1 on failure. */
#ifndef NAME_LOOKUP
#define NAME_LOOKUP
#ifndef DNS_H
#define DNS_H
/* Initializes http based name lookups. Note: This function must be called only once before additional
* threads are spawned.
*
* Returns 0 on success.
* Returns -1 on failure.
*/
int name_lookup_init(void);
void name_lookup_cleanup(void);
/* creates new thread for dns3 lookup. Only allows one lookup at a time. */
void dns3_lookup(ToxWindow *self, Tox *m, const char *id_bin, const char *addr, const char *msg);
int name_lookup(ToxWindow *self, Tox *m, const char *id_bin, const char *addr, const char *message);
#endif /* #define DNS_H */
#endif /* NAME_LOOKUP */

28
src/toxic.c
View File

@ -58,6 +58,7 @@
#include "message_queue.h"
#include "execute.h"
#include "term_mplex.h"
#include "name_lookup.h"
#ifdef X11
#include "xtra.h"
@ -155,6 +156,7 @@ void exit_toxic_success(Tox *m)
free_global_data();
tox_kill(m);
endwin();
name_lookup_cleanup();
#ifdef X11
/* We have to terminate xtra last coz reasons
@ -904,7 +906,7 @@ static void print_usage(void)
fprintf(stderr, " -o, --noconnect Do not connect to the DHT network\n");
fprintf(stderr, " -p, --SOCKS5-proxy Use SOCKS5 proxy: Requires [IP] [port]\n");
fprintf(stderr, " -P, --HTTP-proxy Use HTTP proxy: Requires [IP] [port]\n");
fprintf(stderr, " -r, --dnslist Use specified DNSservers file\n");
fprintf(stderr, " -r, --namelist Use specified name lookup server list\n");
fprintf(stderr, " -t, --force-tcp Force toxic to use a TCP connection (use with proxies)\n");
fprintf(stderr, " -T, --tcp-server Act as a TCP relay server: Requires [port]\n");
fprintf(stderr, " -u, --unencrypt-data Unencrypt an encrypted data file\n");
@ -932,7 +934,7 @@ static void parse_args(int argc, char *argv[])
{"nodes", required_argument, 0, 'n'},
{"help", no_argument, 0, 'h'},
{"noconnect", no_argument, 0, 'o'},
{"dnslist", required_argument, 0, 'r'},
{"namelist", required_argument, 0, 'r'},
{"force-tcp", no_argument, 0, 't'},
{"tcp-server", required_argument, 0, 'T'},
{"SOCKS5-proxy", required_argument, 0, 'p'},
@ -1044,10 +1046,10 @@ static void parse_args(int argc, char *argv[])
break;
case 'r':
snprintf(arg_opts.dns_path, sizeof(arg_opts.dns_path), "%s", optarg);
snprintf(arg_opts.nameserver_path, sizeof(arg_opts.nameserver_path), "%s", optarg);
if (!file_exists(arg_opts.dns_path))
queue_init_message("DNSservers file not found");
if (!file_exists(arg_opts.nameserver_path))
queue_init_message("nameserver list not found");
break;
@ -1222,7 +1224,18 @@ int main(int argc, char **argv)
exit_toxic_err("failed in main", FATALERR_MEMORY);
const char *p = arg_opts.config_path[0] ? arg_opts.config_path : NULL;
int settings_err = settings_load(user_settings, p);
if (settings_load(user_settings, p) == -1)
queue_init_message("Failed to load user settings");
int nameserver_ret = name_lookup_init();
if (nameserver_ret == -1)
queue_init_message("curl failed to initialize; name lookup service is disabled.");
else if (nameserver_ret == -2)
queue_init_message("Name lookup server list could not be found.");
else if (nameserver_ret == -3)
queue_init_message("Name lookup server list does not contain any valid entries.");
#ifdef X11
if (init_xtra(DnD_callback) == -1)
@ -1271,9 +1284,6 @@ int main(int argc, char **argv)
init_notify(60, 3000);
if (settings_err == -1)
queue_init_message("Failed to load user settings");
/* screen/tmux auto-away timer */
if (init_mplex_away_timer(m) == -1)
queue_init_message("Failed to init mplex auto-away.");

2
src/windows.h
View File

@ -90,7 +90,7 @@ struct arg_opts {
bool encrypt_data;
bool unencrypt_data;
char dns_path[MAX_STR_SIZE];
char nameserver_path[MAX_STR_SIZE];
char config_path[MAX_STR_SIZE];
char nodes_path[MAX_STR_SIZE];