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tor/src/test/test_socks.c
Nick Mathewson c116728209 Use __attribute__((fallthrough)) rather than magic GCC comments. 
GCC added an implicit-fallthrough warning a while back, where it
would complain if you had a nontrivial "case:" block that didn't end
with break, return, or something like that.  Clang recently added
the same thing.

GCC, however, would let you annotate a fall-through as intended by
any of various magic "/* fall through */" comments.  Clang, however,
only seems to like "__attribute__((fallthrough))".  Fortunately, GCC
accepts that too.

A previous commit in this branch defined a FALLTHROUGH macro to do
the right thing if GNUC is defined; here we replace all of our "fall
through" comments with uses of that macro.

This is an automated commit, made with the following perl one-liner:

  #!/usr/bin/perl -i -p
  s#/\* *falls? ?thr.*?\*/#FALLTHROUGH;#i;

(In order to avoid conflicts, I'm applying this script separately to
each maint branch. This is the 0.4.3 version.)
2020-05-06 16:55:25 -04:00

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/* Copyright (c) 2001-2004, Roger Dingledine.
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "core/or/or.h"
#include "lib/buf/buffers.h"
#include "app/config/config.h"
#include "core/mainloop/connection.h"
#include "core/proto/proto_socks.h"
#include "test/test.h"
#include "test/log_test_helpers.h"
#include "core/or/socks_request_st.h"
#include "lib/net/socks5_status.h"
typedef struct socks_test_data_t {
socks_request_t *req;
buf_t *buf;
} socks_test_data_t;
static void *
socks_test_setup(const struct testcase_t *testcase)
{
socks_test_data_t *data = tor_malloc(sizeof(socks_test_data_t));
(void)testcase;
data->buf = buf_new_with_capacity(256);
data->req = socks_request_new();
config_register_addressmaps(get_options());
return data;
}
static int
socks_test_cleanup(const struct testcase_t *testcase, void *ptr)
{
socks_test_data_t *data = ptr;
(void)testcase;
buf_free(data->buf);
socks_request_free(data->req);
tor_free(data);
return 1;
}
static const struct testcase_setup_t socks_setup = {
socks_test_setup, socks_test_cleanup
};
#define SOCKS_TEST_INIT() \
socks_test_data_t *testdata = ptr; \
buf_t *buf = testdata->buf; \
socks_request_t *socks = testdata->req;
#define ADD_DATA(buf, s) \
buf_add(buf, s, sizeof(s)-1)
static void
socks_request_clear(socks_request_t *socks)
{
tor_free(socks->username);
tor_free(socks->password);
memset(socks, 0, sizeof(socks_request_t));
}
/** Perform unsupported SOCKS 4 commands */
static void
test_socks_4_unsupported_commands(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 4 Send BIND [02] to IP address 2.2.2.2:4369 */
ADD_DATA(buf, "\x04\x02\x11\x11\x02\x02\x02\x02\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
tt_int_op(4,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, socks->replylen); /* XXX: shouldn't tor reply? */
done:
;
}
/** Perform supported SOCKS 4 commands */
static void
test_socks_4_supported_commands(void *ptr)
{
SOCKS_TEST_INIT();
tt_int_op(0,OP_EQ, buf_datalen(buf));
/* SOCKS 4 Send CONNECT [01] to IP address 2.2.2.3:4370 */
ADD_DATA(buf, "\x04\x01\x11\x12\x02\x02\x02\x03\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(4,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, socks->replylen); /* XXX: shouldn't tor reply? */
tt_int_op(SOCKS_COMMAND_CONNECT,OP_EQ, socks->command);
tt_str_op("2.2.2.3",OP_EQ, socks->address);
tt_int_op(4370,OP_EQ, socks->port);
tt_assert(socks->got_auth == 0);
tt_assert(! socks->username);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 4 Send CONNECT [01] to IP address 2.2.2.4:4369 with userid*/
ADD_DATA(buf, "\x04\x01\x11\x12\x02\x02\x02\x04me\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0),
OP_EQ, 1);
tt_int_op(4,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, socks->replylen); /* XXX: shouldn't tor reply? */
tt_int_op(SOCKS_COMMAND_CONNECT,OP_EQ, socks->command);
tt_str_op("2.2.2.4",OP_EQ, socks->address);
tt_int_op(4370,OP_EQ, socks->port);
tt_assert(socks->got_auth == 1);
tt_assert(socks->username);
tt_int_op(2,OP_EQ, socks->usernamelen);
tt_mem_op("me",OP_EQ, socks->username, 2);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 4a Send RESOLVE [F0] request for torproject.org */
ADD_DATA(buf, "\x04\xF0\x01\x01\x00\x00\x00\x02me\x00torproject.org\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, 1,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(4,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, socks->replylen); /* XXX: shouldn't tor reply? */
tt_str_op("torproject.org",OP_EQ, socks->address);
tt_int_op(0,OP_EQ, buf_datalen(buf));
done:
;
}
static void
test_socks_4_bad_arguments(void *ptr)
{
SOCKS_TEST_INIT();
setup_capture_of_logs(LOG_DEBUG);
/* Try with 0 IPv4 address */
ADD_DATA(buf, "\x04\x01\x00\x50\x00\x00\x00\x00\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Port or DestIP is zero.");
mock_clean_saved_logs();
/* Try with 0 port */
ADD_DATA(buf, "\x04\x01\x00\x00\x01\x02\x03\x04\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Port or DestIP is zero.");
mock_clean_saved_logs();
/* Try with 2000-byte username (!) */
ADD_DATA(buf, "\x04\x01\x00\x50\x01\x02\x03\x04");
int i;
for (i = 0; i < 200; ++i) {
ADD_DATA(buf, "1234567890");
}
ADD_DATA(buf, "\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0),
OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("socks4: parsing failed - invalid request.");
mock_clean_saved_logs();
/* Try with 2000-byte hostname */
ADD_DATA(buf, "\x04\x01\x00\x50\x00\x00\x00\x01\x00");
for (i = 0; i < 200; ++i) {
ADD_DATA(buf, "1234567890");
}
ADD_DATA(buf, "\x00");
{
const char *p;
size_t s;
buf_pullup(buf, 9999, &p, &s);
}
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0),
OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Destaddr too long. Rejecting.");
mock_clean_saved_logs();
/* Try with 2000-byte hostname, not terminated. */
ADD_DATA(buf, "\x04\x01\x00\x50\x00\x00\x00\x01\x00");
for (i = 0; i < 200; ++i) {
ADD_DATA(buf, "1234567890");
}
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0),
OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("parsing failed - invalid request.");
mock_clean_saved_logs();
/* Socks4, bogus hostname */
ADD_DATA(buf, "\x04\x01\x00\x50\x00\x00\x00\x01\x00" "---\x00" );
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0), OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Your application (using socks4 to port 80) "
"gave Tor a malformed hostname: ");
mock_clean_saved_logs();
done:
teardown_capture_of_logs();
}
/** Perform unsupported SOCKS 5 commands */
static void
test_socks_5_unsupported_commands(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Send unsupported BIND [02] command */
ADD_DATA(buf, "\x05\x02\x00\x01");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, 0);
tt_int_op(0,OP_EQ, buf_datalen(buf));
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
ADD_DATA(buf, "\x05\x02\x00\x01\x02\x02\x02\x01\x01\x01");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
tt_int_op(SOCKS5_COMMAND_NOT_SUPPORTED,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
buf_clear(buf);
socks_request_clear(socks);
/* SOCKS 5 Send unsupported UDP_ASSOCIATE [03] command */
ADD_DATA(buf, "\x05\x02\x00\x01");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, 0);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
ADD_DATA(buf, "\x05\x03\x00\x01\x02\x02\x02\x01\x01\x01");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
tt_int_op(SOCKS5_COMMAND_NOT_SUPPORTED,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
done:
;
}
/** Perform supported SOCKS 5 commands */
static void
test_socks_5_supported_commands(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Send CONNECT [01] to IP address 2.2.2.2:4369 */
ADD_DATA(buf, "\x05\x01\x00");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, 0);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
ADD_DATA(buf, "\x05\x01\x00\x01\x02\x02\x02\x02\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, 1);
tt_str_op("2.2.2.2",OP_EQ, socks->address);
tt_int_op(4369,OP_EQ, socks->port);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send CONNECT [01] to one of the ipv6 addresses for
torproject.org:80 */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\x01\x00\x04"
"\x20\x02\x41\xb8\x02\x02\x0d\xeb\x02\x13\x21\xff\xfe\x20\x14\x26"
"\x00\x50");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("[2002:41b8:202:deb:213:21ff:fe20:1426]",OP_EQ, socks->address);
tt_int_op(80,OP_EQ, socks->port);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send CONNECT [01] to FQDN torproject.org:4369 */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\x01\x00\x03\x0Etorproject.org\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, 1,
get_options()->SafeSocks),OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("torproject.org",OP_EQ, socks->address);
tt_int_op(4369,OP_EQ, socks->port);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send RESOLVE [F0] request for torproject.org:4369 */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF0\x00\x03\x0Etorproject.org\x01\x02");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("torproject.org",OP_EQ, socks->address);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Should NOT reject RESOLVE [F0] request for IPv4 address
* string if SafeSocks is enabled. */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF0\x00\x03\x07");
ADD_DATA(buf, "8.8.8.8");
ADD_DATA(buf, "\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks, 1),
OP_EQ, 1);
tt_str_op("8.8.8.8", OP_EQ, socks->address);
tt_int_op(4369, OP_EQ, socks->port);
tt_int_op(0, OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 should NOT reject RESOLVE [F0] request for IPv6 address
* string if SafeSocks is enabled. */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF0\x00\x03\x29");
ADD_DATA(buf, "[2001:0db8:85a3:0000:0000:8a2e:0370:7334]");
ADD_DATA(buf, "\x01\x02");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks, 1),
OP_EQ, 1);
tt_str_op("[2001:0db8:85a3:0000:0000:8a2e:0370:7334]", OP_EQ,
socks->address);
tt_int_op(258, OP_EQ, socks->port);
tt_int_op(0, OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* Also allow bracket-less form. */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF0\x00\x03\x27");
ADD_DATA(buf, "2001:0db8:85a3:0000:0000:8a2e:0370:7334");
ADD_DATA(buf, "\x01\x02");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks, 1),
OP_EQ, 1);
tt_str_op("2001:0db8:85a3:0000:0000:8a2e:0370:7334", OP_EQ,
socks->address);
tt_int_op(258, OP_EQ, socks->port);
tt_int_op(0, OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send RESOLVE_PTR [F1] for IP address 2.2.2.5 */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF1\x00\x01\x02\x02\x02\x05\x01\x03");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("2.2.2.5",OP_EQ, socks->address);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send RESOLVE_PTR [F1] for an IPv6 address */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF1\x00\x04"
"\x20\x01\x0d\xb8\x85\xa3\x00\x00\x00\x00\x8a\x2e\x03\x70\x73\x34"
"\x12\x34");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("[2001:db8:85a3::8a2e:370:7334]",OP_EQ, socks->address);
tt_int_op(0,OP_EQ, buf_datalen(buf));
socks_request_clear(socks);
/* SOCKS 5 Send RESOLVE_PTR [F1] for a an IPv6 address written as a
* string with brackets */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF1\x00\x03\x1e");
ADD_DATA(buf, "[2001:db8:85a3::8a2e:370:7334]");
ADD_DATA(buf, "\x12\x34");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("[2001:db8:85a3::8a2e:370:7334]",OP_EQ, socks->address);
tt_int_op(0,OP_EQ, buf_datalen(buf));
done:
;
}
/** Perform SOCKS 5 authentication */
static void
test_socks_5_no_authenticate(void *ptr)
{
SOCKS_TEST_INIT();
/*SOCKS 5 No Authentication */
ADD_DATA(buf,"\x05\x01\x00");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(SOCKS_NO_AUTH,OP_EQ, socks->reply[1]);
tt_int_op(0,OP_EQ, buf_datalen(buf));
/*SOCKS 5 Send username/password anyway - pretend to be broken */
ADD_DATA(buf,"\x01\x02\x01\x01\x02\x01\x01");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(1,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_int_op(2,OP_EQ, socks->usernamelen);
tt_int_op(2,OP_EQ, socks->passwordlen);
tt_mem_op("\x01\x01",OP_EQ, socks->username, 2);
tt_mem_op("\x01\x01",OP_EQ, socks->password, 2);
done:
;
}
/** Perform SOCKS 5 authentication */
static void
test_socks_5_authenticate(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Negotiate username/password authentication */
ADD_DATA(buf, "\x05\x01\x02");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(SOCKS_USER_PASS,OP_EQ, socks->reply[1]);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, buf_datalen(buf));
/* SOCKS 5 Send username/password */
ADD_DATA(buf, "\x01\x02me\x08mypasswd");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(1,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_int_op(2,OP_EQ, socks->usernamelen);
tt_int_op(8,OP_EQ, socks->passwordlen);
tt_mem_op("me",OP_EQ, socks->username, 2);
tt_mem_op("mypasswd",OP_EQ, socks->password, 8);
done:
;
}
/** Perform SOCKS 5 authentication with empty username/password fields.
* Technically this violates RfC 1929, but some client software will send
* this kind of message to Tor.
* */
static void
test_socks_5_authenticate_empty_user_pass(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Negotiate username/password authentication */
ADD_DATA(buf, "\x05\x01\x02");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(SOCKS_USER_PASS,OP_EQ, socks->reply[1]);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, buf_datalen(buf));
/* SOCKS 5 Send username/password auth message with empty user/pass fields */
ADD_DATA(buf, "\x01\x00\x00");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(1,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_int_op(0,OP_EQ, socks->usernamelen);
tt_int_op(0,OP_EQ, socks->passwordlen);
done:
;
}
/** Perform SOCKS 5 authentication and send data all in one go */
static void
test_socks_5_authenticate_with_data(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Negotiate username/password authentication */
ADD_DATA(buf, "\x05\x01\x02");
tt_assert(!fetch_from_buf_socks(buf, socks,
get_options()->TestSocks,
get_options()->SafeSocks));
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(SOCKS_USER_PASS,OP_EQ, socks->reply[1]);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, buf_datalen(buf));
/* SOCKS 5 Send username/password */
/* SOCKS 5 Send CONNECT [01] to IP address 2.2.2.2:4369 */
ADD_DATA(buf, "\x01\x02me\x03you\x05\x01\x00\x01\x02\x02\x02\x02\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 1);
tt_int_op(5,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(1,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
tt_str_op("2.2.2.2",OP_EQ, socks->address);
tt_int_op(4369,OP_EQ, socks->port);
tt_int_op(2,OP_EQ, socks->usernamelen);
tt_int_op(3,OP_EQ, socks->passwordlen);
tt_mem_op("me",OP_EQ, socks->username, 2);
tt_mem_op("you",OP_EQ, socks->password, 3);
done:
;
}
/** Try to negotiate an unsupported authentication type */
static void
test_socks_5_auth_unsupported_type(void *ptr)
{
SOCKS_TEST_INIT();
/* None of these authentication types are recognized. */
ADD_DATA(buf, "\x05\x03\x99\x21\x10");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
tt_int_op(0,OP_EQ, socks->socks_version);
tt_int_op(2,OP_EQ, socks->replylen);
tt_int_op(5,OP_EQ, socks->reply[0]);
tt_int_op(0xff,OP_EQ, socks->reply[1]);
done:
;
}
/** Try to negotiate an unsupported version of username/password auth. */
static void
test_socks_5_auth_unsupported_version(void *ptr)
{
SOCKS_TEST_INIT();
/* Negotiate username/password */
ADD_DATA(buf, "\x05\x01\x02");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, 0);
tt_int_op(0,OP_EQ, buf_datalen(buf)); /* buf should be drained */
/* Now, suggest an unrecognized username/password version */
ADD_DATA(buf, "\x02\x05" "hello" "\x05" "world");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
done:
;
}
/** Perform SOCKS 5 authentication before method negotiated */
static void
test_socks_5_auth_before_negotiation(void *ptr)
{
SOCKS_TEST_INIT();
/* SOCKS 5 Send username/password */
ADD_DATA(buf, "\x01\x02me\x02me");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),
OP_EQ, -1);
tt_int_op(0,OP_EQ, socks->socks_version);
tt_int_op(0,OP_EQ, socks->replylen);
tt_int_op(0,OP_EQ, socks->reply[0]);
tt_int_op(0,OP_EQ, socks->reply[1]);
done:
;
}
/** Perform malformed SOCKS 5 commands */
static void
test_socks_5_malformed_commands(void *ptr)
{
SOCKS_TEST_INIT();
/* XXX: Stringified address length > MAX_SOCKS_ADDR_LEN will never happen */
/** SOCKS 5 Send CONNECT [01] to IP address 2.2.2.2:4369, with SafeSocks set
*/
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\x01\x00\x01\x02\x02\x02\x02\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks, 1),
OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
tt_int_op(SOCKS5_NOT_ALLOWED,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
buf_clear(buf);
socks_request_clear(socks);
/* SOCKS 5 Send RESOLVE_PTR [F1] for FQDN torproject.org */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\xF1\x00\x03\x0Etorproject.org\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
tt_int_op(SOCKS5_ADDRESS_TYPE_NOT_SUPPORTED,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
buf_clear(buf);
socks_request_clear(socks);
/* XXX: len + 1 > MAX_SOCKS_ADDR_LEN (FQDN request) will never happen */
/* SOCKS 5 Send CONNECT [01] to FQDN """"".com */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\x01\x00\x03\x09\"\"\"\"\".com\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
tt_int_op(SOCKS5_GENERAL_ERROR,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
buf_clear(buf);
socks_request_clear(socks);
/* SOCKS 5 Send CONNECT [01] to address type 0x23 */
ADD_DATA(buf, "\x05\x01\x00");
ADD_DATA(buf, "\x05\x01\x00\x23\x02\x02\x02\x02\x11\x11");
tt_int_op(fetch_from_buf_socks(buf, socks, get_options()->TestSocks,
get_options()->SafeSocks),OP_EQ, -1);
tt_int_op(5,OP_EQ,socks->socks_version);
tt_int_op(10,OP_EQ,socks->replylen);
tt_int_op(5,OP_EQ,socks->reply[0]);
/* trunnel parsing will fail with -1 */
tt_int_op(SOCKS5_GENERAL_ERROR,OP_EQ,socks->reply[1]);
tt_int_op(1,OP_EQ,socks->reply[3]);
done:
;
}
static void
test_socks_5_bad_arguments(void *ptr)
{
SOCKS_TEST_INIT();
setup_capture_of_logs(LOG_DEBUG);
/* Socks5, bogus hostname */
ADD_DATA(buf, "\x05\x01\x00" "\x05\x01\x00\x03\x03" "---" "\x00\x50" );
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0), OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Your application (using socks5 to port 80) "
"gave Tor a malformed hostname: ");
mock_clean_saved_logs();
socks_request_clear(socks);
done:
teardown_capture_of_logs();
}
/** check for correct behavior when the socks command has not arrived. */
static void
test_socks_truncated(void *ptr)
{
const struct {
enum { NONE, AUTH, ALL } setup;
const char *body;
size_t len;
} commands[] = {
/* SOCKS4 */
/* Connect, to an IP. */
{ NONE, "\x04\x01\x05\x05\x01\x02\x03\x04\x00", 9},
/* Connect, to an IP, with authentication. */
{ NONE, "\x04\x01\x05\x05\x01\x02\x03\x04hello\x00", 14},
/* SOCKS4A */
/* Connect, to a hostname */
{ NONE, "\x04\x01\x09\x09\x00\x00\x00\x01\x00www.example.com\x00", 25},
/* Connect, to a hostname, with authentication */
{ NONE, "\x04\x01\x09\x09\x00\x00\x00\x01hi\x00www.example.com\x00", 27},
/* SOCKS5 */
/* initial handshake */
{ NONE, "\x05\x00", 2 },
/* no-auth handshake */
{ NONE, "\x05\x03\x99\x21\x10", 5 },
/* SOCSK5, username-password, all empty. */
{ AUTH, "\x01\x00\x00", 3 },
/* SOCSK5, username-password, 1 char each. */
{ AUTH, "\x01\x01x\x01y", 5 },
/* SOCSK5, username-password, max length. */
{ AUTH, "\x01\xff"
"Ogni tempo ha il suo fascismo: se ne notano i segni premonitori "
"dovunque la concentrazione di potere nega al cittadino la "
"possibilit\xc3\xa0 e la capacit\xc3\xa0 di esprimere ed attuare la "
"sua volont\xc3\xa0. A questo si arriva in molti modi, non "
"necessariamente col terror"
"\xff"
"e dell'intimidazione poliziesca, ma anche negando o distorcendo "
"l'informazione, inquinando la giustizia, paralizzando la scuola, "
"diffondendo in molti modi sottili la nostalgia per un mondo in cui "
"regnava sovrano l'ordine, ed in cui la sicurezza dei pochi "
/* privilegiati riposava sul lavoro forzato e sul silenzio forzato dei
molti. -- Primo Levi */ , 513 },
/* Socks5, IPv4 address */
{ ALL, "\x05\x01\x00\x01\x01\x02\x03\x04\x20\x20", 10 },
/* Socks5, IPv6 address */
{ ALL, "\x05\x01\x00\x04"
"\x49\x20\x48\x41\x5a\x20\x45\x41\x53\x54\x45\x52\x20\x45\x47\x47"
"\x20\x20", 22 },
/* Socks5, hostname, empty. */
{ ALL, "\x05\x01\x00\x03" "\x00" "\x00\x50", 7 },
/* Socks5, hostname, moderate. */
{ ALL, "\x05\x01\x00\x03" "\x11" "onion.example.com" "\x00\x50", 24 },
/* Socks5, hostname, maximum. */
{ ALL, "\x05\x01\x00\x03" "\xff"
"whatsoever.I.shall.see.or.hear.in.the.course.of.my.profession.as.well."
"as.outside.my.profession.in.my.intercourse.with.men.if.it.be.what."
"should.not.be.published.abroad.I.will.never.divulge.holding.such."
"things.to.be.holy.secrets.x.hippocratic.oath.wikipedia"
"\x00\x50", 262 },
};
unsigned i, j;
SOCKS_TEST_INIT();
for (i = 0; i < ARRAY_LENGTH(commands); ++i) {
for (j = 0; j < commands[i].len; ++j) {
switch (commands[i].setup) {
default: FALLTHROUGH;
case NONE:
/* This test calls for no setup on the socks state. */
break;
case AUTH:
/* This test calls for the socks state to be waiting for
* username/password authentication */
ADD_DATA(buf, "\x05\x01\x02");
tt_int_op(0, OP_EQ, fetch_from_buf_socks(buf, socks, 0, 0));
tt_int_op(0, OP_EQ, buf_datalen(buf));
break;
case ALL:
/* This test calls for the socks state to be waiting for
* the connection request */
ADD_DATA(buf, "\x05\x01\x00");
tt_int_op(0, OP_EQ, fetch_from_buf_socks(buf, socks, 0, 0));
tt_int_op(0, OP_EQ, buf_datalen(buf));
}
TT_BLATHER(("Checking command %u, length %u, omitting char %u", i, j,
(unsigned)commands[i].body[j]));
buf_add(buf, commands[i].body, j);
/* This should return 0 meaning "not done yet" */
tt_int_op(0, OP_EQ, fetch_from_buf_socks(buf, socks, 0, 0));
tt_uint_op(j, OP_EQ, buf_datalen(buf)); /* Nothing was drained */
buf_clear(buf);
socks_request_free(testdata->req);
socks = testdata->req = socks_request_new();
}
}
done:
;
}
static void
test_socks_wrong_protocol(void *ptr)
{
SOCKS_TEST_INIT();
setup_capture_of_logs(LOG_DEBUG);
/* HTTP request. */
ADD_DATA(buf, "GET /index.html HTTP/1.0" );
tt_int_op(fetch_from_buf_socks(buf, socks, 1, 0), OP_EQ, -1);
buf_clear(buf);
expect_log_msg_containing("Socks version 71 not recognized. "
"(This port is not an HTTP proxy;");
mock_clean_saved_logs();
socks_request_clear(socks);
done:
teardown_capture_of_logs();
}
/* Check our client-side socks4 parsing (that is to say, our parsing of
* server responses).
*/
static void
test_socks_client_v4(void *arg)
{
(void)arg;
buf_t *buf = buf_new();
char *reason = NULL;
/* Legit socks4 response, success */
ADD_DATA(buf, "\x04\x5a\x20\x25\x01\x02\x03\x04");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf, PROXY_SOCKS4_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Legit socks4 response, failure. */
ADD_DATA(buf, "\x04\x5b\x20\x25\x01\x02\x03\x04");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf, PROXY_SOCKS4_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_NE, NULL);
tt_str_op(reason, OP_EQ, "server rejected connection");
done:
buf_free(buf);
tor_free(reason);
}
/* Check our client-side socks5 authentication-negotiation parsing (that is to
* say, our parsing of server responses).
*/
static void
test_socks_client_v5_auth(void *arg)
{
(void)arg;
buf_t *buf = buf_new();
char *reason = NULL;
/* Legit socks5 responses, got a method we like. */
ADD_DATA(buf, "\x05\x00");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_METHOD_NONE,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Same, but we wanted something else. */
ADD_DATA(buf, "\x05\x00");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Same, and they offered a password. */
ADD_DATA(buf, "\x05\x02");
tt_int_op(2, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* They rejected our method, or selected something we don't know. */
ADD_DATA(buf, "\x05\xff");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_METHOD_NONE,
&reason));
tt_str_op(reason, OP_EQ, "server doesn't support any of our available "
"authentication methods");
buf_clear(buf);
tor_free(reason);
ADD_DATA(buf, "\x05\xff");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929,
&reason));
tt_str_op(reason, OP_EQ, "server doesn't support any of our available "
"authentication methods");
tor_free(reason);
buf_clear(buf);
/* Now check for authentication responses: check success and failure. */
ADD_DATA(buf, "\x01\x00");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_RFC1929_OK,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
ADD_DATA(buf, "\x01\xf0");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_AUTH_RFC1929_OK,
&reason));
tt_ptr_op(reason, OP_NE, NULL);
tt_str_op(reason, OP_EQ, "authentication failed");
done:
buf_free(buf);
tor_free(reason);
}
/* Check our client-side socks5 connect parsing (that is to say, our parsing
* of server responses).
*/
static void
test_socks_client_v5_connect(void *arg)
{
(void)arg;
buf_t *buf = buf_new();
char *reason = NULL;
/* Legit socks5 responses, success, ipv4. */
ADD_DATA(buf, "\x05\x00\x00\x01\x01\x02\x03\x04\x00\x05");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Legit socks5 responses, success, ipv6. */
ADD_DATA(buf, "\x05\x00\x00\x04"
"abcdefghijklmnop"
"\x00\x05");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Legit socks5 responses, success, hostname. */
ADD_DATA(buf, "\x05\x00\x00\x03\x12"
"gopher.example.com"
"\x00\x05");
tt_int_op(1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_EQ, NULL);
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* Legit socks5 responses, failure, hostname. */
ADD_DATA(buf, "\x05\x03\x00\x03\x12"
"gopher.example.com"
"\x00\x05");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_NE, NULL);
tt_str_op(reason, OP_EQ, "Network unreachable");
tor_free(reason);
buf_clear(buf);
/* Bogus socks5 responses: what is address type 0x17? */
ADD_DATA(buf, "\x05\x03\x00\x17\x12 blah blah");
tt_int_op(-1, OP_EQ,
fetch_from_buf_socks_client(buf,
PROXY_SOCKS5_WANT_CONNECT_OK,
&reason));
tt_ptr_op(reason, OP_NE, NULL);
tt_str_op(reason, OP_EQ, "invalid response to connect request");
buf_clear(buf);
done:
buf_free(buf);
tor_free(reason);
}
static void
test_socks_client_truncated(void *arg)
{
(void)arg;
buf_t *buf = buf_new();
char *reason = NULL;
#define S(str) str, (sizeof(str)-1)
const struct {
int state;
const char *body;
size_t len;
} replies[] = {
{ PROXY_SOCKS4_WANT_CONNECT_OK, S("\x04\x5a\x20\x25\x01\x02\x03\x04") },
{ PROXY_SOCKS4_WANT_CONNECT_OK, S("\x04\x5b\x20\x25\x01\x02\x03\x04") },
{ PROXY_SOCKS5_WANT_AUTH_METHOD_NONE, S("\x05\x00") },
{ PROXY_SOCKS5_WANT_AUTH_METHOD_RFC1929, S("\x05\x00") },
{ PROXY_SOCKS5_WANT_AUTH_RFC1929_OK, S("\x01\x00") },
{ PROXY_SOCKS5_WANT_CONNECT_OK,
S("\x05\x00\x00\x01\x01\x02\x03\x04\x00\x05") },
{ PROXY_SOCKS5_WANT_CONNECT_OK,
S("\x05\x00\x00\x04" "abcdefghijklmnop" "\x00\x05") },
{ PROXY_SOCKS5_WANT_CONNECT_OK,
S("\x05\x00\x00\x03\x12" "gopher.example.com" "\x00\x05") },
{ PROXY_SOCKS5_WANT_CONNECT_OK,
S("\x05\x03\x00\x03\x12" "gopher.example.com""\x00\x05") },
{ PROXY_SOCKS5_WANT_CONNECT_OK,
S("\x05\x03\x00\x17") },
};
unsigned i, j;
for (i = 0; i < ARRAY_LENGTH(replies); ++i) {
for (j = 0; j < replies[i].len; ++j) {
TT_BLATHER(("Checking command %u, length %u", i, j));
buf_add(buf, replies[i].body, j);
/* This should return 0 meaning "not done yet" */
tt_int_op(0, OP_EQ,
fetch_from_buf_socks_client(buf, replies[i].state, &reason));
tt_uint_op(j, OP_EQ, buf_datalen(buf)); /* Nothing was drained */
buf_clear(buf);
tt_ptr_op(reason, OP_EQ, NULL);
}
}
done:
tor_free(reason);
buf_free(buf);
}
#define SOCKSENT(name) \
{ #name, test_socks_##name, TT_FORK, &socks_setup, NULL }
struct testcase_t socks_tests[] = {
SOCKSENT(4_unsupported_commands),
SOCKSENT(4_supported_commands),
SOCKSENT(4_bad_arguments),
SOCKSENT(5_unsupported_commands),
SOCKSENT(5_supported_commands),
SOCKSENT(5_no_authenticate),
SOCKSENT(5_auth_unsupported_type),
SOCKSENT(5_auth_unsupported_version),
SOCKSENT(5_auth_before_negotiation),
SOCKSENT(5_authenticate),
SOCKSENT(5_authenticate_empty_user_pass),
SOCKSENT(5_authenticate_with_data),
SOCKSENT(5_malformed_commands),
SOCKSENT(5_bad_arguments),
SOCKSENT(truncated),
SOCKSENT(wrong_protocol),
{ "client/v4", test_socks_client_v4, TT_FORK, NULL, NULL },
{ "client/v5_auth", test_socks_client_v5_auth, TT_FORK, NULL, NULL },
{ "client/v5_connect", test_socks_client_v5_connect, TT_FORK, NULL, NULL },
{ "client/truncated", test_socks_client_truncated, TT_FORK, NULL, NULL },
END_OF_TESTCASES
};
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