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Send SOCKS arguments when doing SOCKS5.

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This commit is contained in:
George Kadianakis 2012-12-17 15:07:26 +02:00
parent 14b84858c0
commit 8f2e980159
3 changed files with 51 additions and 11 deletions
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58
src/or/connection.c
View File

@ -1712,8 +1712,13 @@ connection_proxy_connect(connection_t *conn, int type)
buf[0] = 5; /* version */ buf[0] = 5; /* version */
/* We have to use SOCKS5 authentication, if we have a
Socks5ProxyUsername or if we want to pass arguments to our
pluggable transport proxy: */
if ((options->Socks5ProxyUsername) ||
(get_proxy_type() == PROXY_PLUGGABLE &&
(get_socks_args_by_bridge_addrport(&conn->addr, conn->port)))) {
/* number of auth methods */ /* number of auth methods */
if (options->Socks5ProxyUsername) {
buf[1] = 2; buf[1] = 2;
buf[2] = 0x00; /* no authentication */ buf[2] = 0x00; /* no authentication */
buf[3] = 0x02; /* rfc1929 Username/Passwd auth */ buf[3] = 0x02; /* rfc1929 Username/Passwd auth */
@ -1907,15 +1912,47 @@ connection_read_proxy_handshake(connection_t *conn)
unsigned char buf[1024]; unsigned char buf[1024];
size_t reqsize, usize, psize; size_t reqsize, usize, psize;
const char *user, *pass; const char *user, *pass;
char *socks_args_string = NULL;
user = get_options()->Socks5ProxyUsername; if (get_proxy_type() == PROXY_PLUGGABLE) {
pass = get_options()->Socks5ProxyPassword; socks_args_string =
tor_assert(user && pass); pt_get_socks_args_for_proxy_addrport(&conn->addr, conn->port);
if (!socks_args_string) {
log_warn(LD_NET, "Could not create SOCKS args string.");
ret = -1;
break;
}
/* XXX len of user and pass must be <= 255 !!! */ log_debug(LD_NET, "SOCKS5 arguments: %s", socks_args_string);
usize = strlen(user); tor_assert(strlen(socks_args_string) > 0);
psize = strlen(pass); tor_assert(strlen(socks_args_string) <= MAX_SOCKS5_AUTH_SIZE_TOTAL);
tor_assert(usize <= 255 && psize <= 255);
if (strlen(socks_args_string) > MAX_SOCKS5_AUTH_FIELD_SIZE) {
user = socks_args_string;
usize = MAX_SOCKS5_AUTH_FIELD_SIZE;
pass = socks_args_string + MAX_SOCKS5_AUTH_FIELD_SIZE;
psize = strlen(socks_args_string) - MAX_SOCKS5_AUTH_FIELD_SIZE;
} else {
user = socks_args_string;
usize = strlen(socks_args_string);
pass = "\0";
psize = 1;
}
} else if (get_options()->Socks5ProxyUsername) {
user = get_options()->Socks5ProxyUsername;
pass = get_options()->Socks5ProxyPassword;
tor_assert(user && pass);
usize = strlen(user);
psize = strlen(pass);
} else {
log_err(LD_BUG, "We entered %s for no reason!", __func__);
tor_fragile_assert();
ret = -1;
break;
}
tor_assert(usize <= MAX_SOCKS5_AUTH_FIELD_SIZE &&
psize <= MAX_SOCKS5_AUTH_FIELD_SIZE);
reqsize = 3 + usize + psize; reqsize = 3 + usize + psize;
buf[0] = 1; /* negotiation version */ buf[0] = 1; /* negotiation version */
@ -1924,6 +1961,9 @@ connection_read_proxy_handshake(connection_t *conn)
buf[2 + usize] = psize; buf[2 + usize] = psize;
memcpy(buf + 3 + usize, pass, psize); memcpy(buf + 3 + usize, pass, psize);
if (socks_args_string)
tor_free(socks_args_string);
connection_write_to_buf((char *)buf, reqsize, conn); connection_write_to_buf((char *)buf, reqsize, conn);
conn->proxy_state = PROXY_SOCKS5_WANT_AUTH_RFC1929_OK; conn->proxy_state = PROXY_SOCKS5_WANT_AUTH_RFC1929_OK;
@ -4390,7 +4430,7 @@ get_proxy_addrport(tor_addr_t *addr, uint16_t *port, int *proxy_type,
options->Bridges) { options->Bridges) {
const transport_t *transport = NULL; const transport_t *transport = NULL;
int r; int r;
r = find_transport_by_bridge_addrport(&conn->addr, conn->port, &transport); r = get_transport_by_bridge_addrport(&conn->addr, conn->port, &transport);
if (r<0) if (r<0)
return -1; return -1;
if (transport) { /* transport found */ if (transport) { /* transport found */

2
src/or/entrynodes.c
View File

@ -1724,7 +1724,7 @@ find_transport_name_by_bridge_addrport(const tor_addr_t *addr, uint16_t port)
* transport, but the transport could not be found. * transport, but the transport could not be found.
*/ */
int int
find_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port, get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
const transport_t **transport) const transport_t **transport)
{ {
*transport = NULL; *transport = NULL;

2
src/or/entrynodes.h
View File

@ -120,7 +120,7 @@ void entry_guards_free_all(void);
const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr, const char *find_transport_name_by_bridge_addrport(const tor_addr_t *addr,
uint16_t port); uint16_t port);
struct transport_t; struct transport_t;
int find_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port, int get_transport_by_bridge_addrport(const tor_addr_t *addr, uint16_t port,
const struct transport_t **transport); const struct transport_t **transport);
int validate_pluggable_transports_config(void); int validate_pluggable_transports_config(void);