[tor-bugs] #8879 [Tor]: pidgin fails to do socks5 handshake with username/password auth

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#8879: pidgin fails to do socks5 handshake with username/password auth
------------------------+---------------------------------------------------
 Reporter:  arma        |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  normal      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor         |        Version:                    
 Keywords:  tor-client  |         Parent:                    
   Points:              |   Actualpoints:                    
------------------------+---------------------------------------------------
 With Tor 0.2.4.12-alpha and the #8117 patch, my pidgin will no longer
 handshake with my Tor.

 {{{
 May 15 01:15:13.260 [debug] conn_read_callback(): socket 6 wants to read.
 May 15 01:15:13.260 [debug] connection_handle_listener_read(): Connection
 accepted on socket 14 (child of fd 6).
 May 15 01:15:13.260 [debug] connection_add_impl(): new conn type Socks,
 socket 14, address 127.0.0.1, n_conns 6.
 May 15 01:15:13.260 [debug] conn_read_callback(): socket 14 wants to read.
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 0 is '5'
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 1 is '3'
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 2 is '0'
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 3 is '3'
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 4 is '2'
 May 15 01:15:13.260 [debug] read_to_chunk(): Read 5 bytes. 5 on inbuf.
 May 15 01:15:13.260 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:15:13.260 [debug] parse_socks(): socks5: accepted method 2
 (username/password)
 May 15 01:15:13.260 [debug] connection_write_to_buf_impl_(): Wrote byte 0:
 '5'
 May 15 01:15:13.260 [debug] connection_write_to_buf_impl_(): Wrote byte 1:
 '2'
 May 15 01:15:13.260 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:15:13.260 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:15:13.260 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:15:13.260 [debug] conn_write_callback(): socket 14 wants to
 write.
 May 15 01:15:13.260 [debug] conn_read_callback(): socket 14 wants to read.
 May 15 01:15:13.260 [debug] read_to_chunk(): New byte 0 is '1'
 May 15 01:15:13.261 [debug] read_to_chunk(): New byte 1 is '0'
 May 15 01:15:13.261 [debug] read_to_chunk(): New byte 2 is '0'
 May 15 01:15:13.261 [debug] read_to_chunk(): Read 3 bytes. 3 on inbuf.
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:15:13.261 [debug] parse_socks(): socks5: Accepted
 username/password without checking.
 May 15 01:15:13.261 [debug] connection_write_to_buf_impl_(): Wrote byte 0:
 '5'
 May 15 01:15:13.261 [debug] connection_write_to_buf_impl_(): Wrote byte 1:
 '0'
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:15:13.261 [debug] conn_write_callback(): socket 14 wants to
 write.
 May 15 01:15:13.261 [debug] conn_read_callback(): socket 14 wants to read.
 May 15 01:15:13.261 [debug] read_to_chunk(): Encountered eof on fd 14
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:15:13.261 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:15:13.261 [info] connection_edge_reached_eof(): conn (fd 14)
 reached eof. Closing.
 }}}

 If I change my socksport line in my torrc to
 {{{
 SocksPort 9050 PreferSOCKSNoAuth
 }}}

 then it works again:
 {{{
 May 15 01:19:03.307 [debug] conn_read_callback(): socket 6 wants to read.
 May 15 01:19:03.307 [debug] connection_handle_listener_read(): Connection
 accepted on socket 11 (child of fd 6).
 May 15 01:19:03.307 [debug] connection_add_impl(): new conn type Socks,
 socket 11, address 127.0.0.1, n_conns 5.
 May 15 01:19:03.307 [debug] conn_read_callback(): socket 11 wants to read.
 May 15 01:19:03.307 [debug] read_to_chunk(): New byte 0 is '5'
 May 15 01:19:03.307 [debug] read_to_chunk(): New byte 1 is '3'
 May 15 01:19:03.307 [debug] read_to_chunk(): New byte 2 is '0'
 May 15 01:19:03.307 [debug] read_to_chunk(): New byte 3 is '3'
 May 15 01:19:03.307 [debug] read_to_chunk(): New byte 4 is '2'
 May 15 01:19:03.307 [debug] read_to_chunk(): Read 5 bytes. 5 on inbuf.
 May 15 01:19:03.307 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:19:03.307 [debug] parse_socks(): socks5: accepted method 0 (no
 authentication)
 May 15 01:19:03.307 [debug] connection_write_to_buf_impl_(): Wrote byte 0:
 '5'
 May 15 01:19:03.307 [debug] connection_write_to_buf_impl_(): Wrote byte 1:
 '0'
 May 15 01:19:03.307 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:19:03.307 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:19:03.307 [debug] connection_ap_handshake_process_socks(): socks
 handshake not all here yet.
 May 15 01:19:03.307 [debug] conn_write_callback(): socket 11 wants to
 write.
 May 15 01:19:03.311 [debug] conn_read_callback(): socket 11 wants to read.
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 0 is '5'
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 1 is '1'
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 2 is '0'
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 3 is '3'
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 4 is '22'
 May 15 01:19:03.311 [debug] read_to_chunk(): New byte 5 is '97'
 [...]
 May 15 01:19:03.311 [debug] read_to_chunk(): Read 29 bytes. 29 on inbuf.
 May 15 01:19:03.311 [debug] connection_ap_handshake_process_socks():
 entered.
 May 15 01:19:03.312 [debug] parse_socks(): socks5: checking request
 May 15 01:19:03.312 [debug] parse_socks(): socks5: fqdn address type
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8879>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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