dropbear: svr-session.c annotate

annotate svr-session.c @ 1570:67cb1983500b

avoid fsanitize=address for fuzzing

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 01 Mar 2018 23:47:46 +0800
parents	92c93b4a3646
children	76189c9ffea2

rev	line source
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	1 /*
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	2 * Dropbear - a SSH2 server
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	3 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	4 * Copyright (c) 2002,2003 Matt Johnston
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	5 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	6 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	7 * Permission is hereby granted, free of charge, to any person obtaining a copy
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	8 * of this software and associated documentation files (the "Software"), to deal
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	9 * in the Software without restriction, including without limitation the rights
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	11 * copies of the Software, and to permit persons to whom the Software is
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	12 * furnished to do so, subject to the following conditions:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	13 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	14 * The above copyright notice and this permission notice shall be included in
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	15 * all copies or substantial portions of the Software.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	16 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	23 * SOFTWARE. */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	24
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	25 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 #include "packet.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 #include "algo.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 #include "buffer.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 #include "dss.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 #include "ssh.h"
858 220f55d540ae rename random.h to dbrandom.h since some OSes have a system random.h Matt Johnston <matt@ucc.asn.au> parents: 801 diff changeset	33 #include "dbrandom.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 #include "kex.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 #include "channel.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 #include "chansession.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 #include "atomicio.h"
68 eee77ac31ccc cleaning up the pubkey defines Matt Johnston <matt@ucc.asn.au> parents: 62 diff changeset	38 #include "tcpfwd.h"
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	39 #include "service.h"
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	40 #include "auth.h"
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	41 #include "runopts.h"
766 d1575fdc29a6 start on ecdsa keys Matt Johnston <matt@ucc.asn.au> parents: 687 diff changeset	42 #include "crypto_desc.h"
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: 1347 diff changeset	43 #include "fuzz.h"
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44
1276 9169e4e7cbee fix empty C prototypes Francois Perrad <francois.perrad@gadz.org> parents: 1237 diff changeset	45 static void svr_remoteclosed(void);
1544 d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	46 static void svr_algos_initialise(void);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47
24 469950e86d0f switching to global vars Matt Johnston <matt@ucc.asn.au> parents: 22 diff changeset	48 struct serversession svr_ses; /* GLOBAL */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	50 static const packettype svr_packettypes[] = {
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	51 {SSH_MSG_CHANNEL_DATA, recv_msg_channel_data},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	52 {SSH_MSG_CHANNEL_WINDOW_ADJUST, recv_msg_channel_window_adjust},
45 9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	53 {SSH_MSG_USERAUTH_REQUEST, recv_msg_userauth_request}, /* server */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	54 {SSH_MSG_SERVICE_REQUEST, recv_msg_service_request}, /* server */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	55 {SSH_MSG_KEXINIT, recv_msg_kexinit},
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	56 {SSH_MSG_KEXDH_INIT, recv_msg_kexdh_init}, /* server */
9ee8996a375f Pubkey auth is mostly there for the client. Something strange with Matt Johnston <matt@ucc.asn.au> parents: 35 diff changeset	57 {SSH_MSG_NEWKEYS, recv_msg_newkeys},
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	58 {SSH_MSG_GLOBAL_REQUEST, recv_msg_global_request_remotetcp},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	59 {SSH_MSG_CHANNEL_REQUEST, recv_msg_channel_request},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	60 {SSH_MSG_CHANNEL_OPEN, recv_msg_channel_open},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	61 {SSH_MSG_CHANNEL_EOF, recv_msg_channel_eof},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	62 {SSH_MSG_CHANNEL_CLOSE, recv_msg_channel_close},
970 0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	63 {SSH_MSG_CHANNEL_SUCCESS, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	64 {SSH_MSG_CHANNEL_FAILURE, ignore_recv_response},
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	65 {SSH_MSG_REQUEST_FAILURE, ignore_recv_response}, /* for keepalive */
0bb16232e7c4 Make keepalive handling more robust, this should now match what OpenSSH does Matt Johnston <matt@ucc.asn.au> parents: 968 diff changeset	66 {SSH_MSG_REQUEST_SUCCESS, ignore_recv_response}, /* client */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	67 #if DROPBEAR_LISTENERS
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	68 {SSH_MSG_CHANNEL_OPEN_CONFIRMATION, recv_msg_channel_open_confirmation},
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	69 {SSH_MSG_CHANNEL_OPEN_FAILURE, recv_msg_channel_open_failure},
156 8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 98 diff changeset	70 #endif
1404 e8f67918fdc9 when pointer, use NULL instead of 0 Francois Perrad <francois.perrad@gadz.org> parents: 1316 diff changeset	71 {0, NULL} /* End */
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	72 };
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	73
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	74 static const struct ChanType *svr_chantypes[] = {
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 5 diff changeset	75 &svrchansess,
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	76 #if DROPBEAR_SVR_LOCALTCPFWD
62 20563735e8b5 just checkpointing Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	77 &svr_chan_tcpdirect,
156 8c2b3506f112 Rearrange preprocessor parts so that compilation with various options Matt Johnston <matt@ucc.asn.au> parents: 98 diff changeset	78 #endif
6 ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 5 diff changeset	79 NULL /* Null termination is mandatory. */
ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 5 diff changeset	80 };
ab00ef513e97 Sorted out the first channel init issues. Matt Johnston <matt@ucc.asn.au> parents: 5 diff changeset	81
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	82 static void
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	83 svr_session_cleanup(void) {
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	84 /* free potential public key options */
70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	85 svr_pubkey_options_cleanup();
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	86
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	87 m_free(svr_ses.addrstring);
1041 3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	88 m_free(svr_ses.remotehost);
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	89 m_free(svr_ses.childpids);
1041 3fb883a6aa81 Some additional cleanup functions Matt Johnston <matt@ucc.asn.au> parents: 1040 diff changeset	90 svr_ses.childpidsize = 0;
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	91 }
70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	92
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	93 void svr_session(int sock, int childpipe) {
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	94 char host, port;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	95 size_t len;
272 3be7ae2e8dfa Only read /dev/random once when the program starts Matt Johnston <matt@ucc.asn.au> parents: 158 diff changeset	96
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	97 common_session_init(sock, sock);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	98
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	99 /* Initialise server specific parts of the session */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 svr_ses.childpipe = childpipe;
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	101 #if DROPBEAR_VFORK
553 8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	102 svr_ses.server_pid = getpid();
8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	103 #endif
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	104 svr_authinitialise();
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	105 chaninitialise(svr_chantypes);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106 svr_chansessinitialise();
1544 d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	107 svr_algos_initialise();
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108
568 005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	109 /* for logging the remote address */
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	110 get_socket_address(ses.sock_in, NULL, NULL, &host, &port, 0);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	111 len = strlen(host) + strlen(port) + 2;
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	112 svr_ses.addrstring = m_malloc(len);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	113 snprintf(svr_ses.addrstring, len, "%s:%s", host, port);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	114 m_free(host);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	115 m_free(port);
005530560594 Rearrange getaddrstring() etc Matt Johnston <matt@ucc.asn.au> parents: 553 diff changeset	116
572 8fd0ac8c8cab Move remotehost into svr_ses structure since we can't look it up Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	117 get_socket_address(ses.sock_in, NULL, NULL,
8fd0ac8c8cab Move remotehost into svr_ses structure since we can't look it up Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	118 &svr_ses.remotehost, NULL, 1);
8fd0ac8c8cab Move remotehost into svr_ses structure since we can't look it up Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	119
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	120 /* set up messages etc */
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	121 ses.remoteclosed = svr_remoteclosed;
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	122 ses.extra_session_cleanup = svr_session_cleanup;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	123
22 c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	124 /* packet handlers */
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	125 ses.packettypes = svr_packettypes;
c1e5d9195402 merge of abac2150ee4f4031a98016241fbd136d24fed127 Matt Johnston <matt@ucc.asn.au> parents: 14 diff changeset	126
35 0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	127 ses.isserver = 1;
0ad5fb979f42 set the isserver flag (oops) Matt Johnston <matt@ucc.asn.au> parents: 33 diff changeset	128
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	129 /* We're ready to go now */
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1404 diff changeset	130 ses.init_done = 1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	131
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	132 /* exchange identification, version etc */
726 78eda530c000 send out our kexinit packet before blocking to read the SSH version string Matt Johnston <matt@ucc.asn.au> parents: 687 diff changeset	133 send_session_identification();
1083 8e0280986710 Make sure kexfirstinitialise is called early enough Matt Johnston <matt@ucc.asn.au> parents: 1041 diff changeset	134
8e0280986710 Make sure kexfirstinitialise is called early enough Matt Johnston <matt@ucc.asn.au> parents: 1041 diff changeset	135 kexfirstinitialise(); /* initialise the kex state */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	136
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	137 /* start off with key exchange */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	138 send_msg_kexinit();
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	139
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	140 /* Run the main for loop. NULL is for the dispatcher - only the client
0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	141 * code makes use of it */
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1404 diff changeset	142 session_loop(svr_chansess_checksignal);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	143
26 0969767bca0d snapshot of stuff Matt Johnston <matt@ucc.asn.au> parents: 24 diff changeset	144 /* Not reached */
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	145
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	146 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 /* failure exit - format must be <= 100 chars */
5 bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	149 void svr_dropbear_exit(int exitcode, const char* format, va_list param) {
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	150 char exitmsg[150];
b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	151 char fullmsg[300];
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	152 int i;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	154 /* Render the formatted exit message */
b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	155 vsnprintf(exitmsg, sizeof(exitmsg), format, param);
b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	156
b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	157 /* Add the prefix depending on session/auth state */
1495 0c16b4ccbd54 make signal flags volatile, simplify handling Matt Johnston <matt@ucc.asn.au> parents: 1404 diff changeset	158 if (!ses.init_done) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	159 /* before session init */
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	160 snprintf(fullmsg, sizeof(fullmsg), "Early exit: %s", exitmsg);
33 f789045062e6 Progressing client support Matt Johnston <matt@ucc.asn.au> parents: 26 diff changeset	161 } else if (ses.authstate.authdone) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	162 /* user has authenticated */
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	163 snprintf(fullmsg, sizeof(fullmsg),
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 572 diff changeset	164 "Exit (%s): %s",
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	165 ses.authstate.pw_name, exitmsg);
464 4317be8b7cf9 Make a copy of passwd fields since getpwnam()'s retval isn't safe to keep Matt Johnston <matt@ucc.asn.au> parents: 454 diff changeset	166 } else if (ses.authstate.pw_name) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	167 /* we have a potential user */
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	168 snprintf(fullmsg, sizeof(fullmsg),
1237 888e3d17e962 Fix print format specifier Chocobo1 <Chocobo1@users.noreply.github.com> parents: 1215 diff changeset	169 "Exit before auth (user '%s', %u fails): %s",
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	170 ses.authstate.pw_name, ses.authstate.failcount, exitmsg);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	171 } else {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	172 /* before userauth */
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	173 snprintf(fullmsg, sizeof(fullmsg), "Exit before auth: %s", exitmsg);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	174 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	175
1304 b66a483f3dcb Improve exit message formatting Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	176 dropbear_log(LOG_INFO, "%s", fullmsg);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	177
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	178 #if DROPBEAR_VFORK
667 fc7ae88e63b3 Rename HAVE_FORK to USE_VFORK Matt Johnston <matt@ucc.asn.au> parents: 666 diff changeset	179 /* For uclinux only the main server process should cleanup - we don't want
553 8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	180 * forked children doing that */
8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	181 if (svr_ses.server_pid == getpid())
8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	182 #endif
8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	183 {
8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	184 /* must be after we've done with username etc */
733 70811267715c Run the cleanup handler also when we close due to TCP connection being closed Matt Johnston <matt@ucc.asn.au> parents: 726 diff changeset	185 session_cleanup();
553 8711f20b89ab - For uclinux, only cleanup on exit for the main process. This avoids Matt Johnston <matt@ucc.asn.au> parents: 496 diff changeset	186 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	187
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1546 diff changeset	188 #if DROPBEAR_FUZZ
1559 92c93b4a3646 Fix to be able to compile normal(ish) binaries with --enable-fuzz Matt Johnston <matt@ucc.asn.au> parents: 1558 diff changeset	189 /* longjmp before cleaning up svr_opts */
1385 6c92e97553f1 Add a flag whether to longjmp, missed that last commit Matt Johnston <matt@ucc.asn.au> parents: 1358 diff changeset	190 if (fuzz.do_jmp) {
1348 5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: 1347 diff changeset	191 longjmp(fuzz.jmp, 1);
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: 1347 diff changeset	192 }
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: 1347 diff changeset	193 #endif
5c2899e35b63 fuzz harness Matt Johnston <matt@ucc.asn.au> parents: 1347 diff changeset	194
1040 2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	195 if (svr_opts.hostkey) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	196 sign_key_free(svr_opts.hostkey);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	197 svr_opts.hostkey = NULL;
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	198 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	199 for (i = 0; i < DROPBEAR_MAX_PORTS; i++) {
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	200 m_free(svr_opts.addresses[i]);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	201 m_free(svr_opts.ports[i]);
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	202 }
2b4fd440399d Free memory before exiting. Based on patch from Thorsten Horstmann. Matt Johnston <matt@ucc.asn.au> parents: 970 diff changeset	203
1347 b28624698130 copy over some fuzzing code from AFL branch Matt Johnston <matt@ucc.asn.au> parents: 1304 diff changeset	204
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	205 exit(exitcode);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	206
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	207 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	208
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	209 /* priority is priority as with syslog() */
5 bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	210 void svr_dropbear_log(int priority, const char* format, va_list param) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	211
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	212 char printbuf[1024];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	213 char datestr[20];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	214 time_t timesec;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	215 int havetrace = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	216
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	217 vsnprintf(printbuf, sizeof(printbuf), format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	218
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	219 #ifndef DISABLE_SYSLOG
1210 64a50eac1030 Moved usingsyslog from svr_runopts to runopts. Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1139 diff changeset	220 if (opts.usingsyslog) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 syslog(priority, "%s", printbuf);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	223 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	224
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	225 /* if we are using DEBUG_TRACE, we want to print to stderr even if
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	226 * syslog is used, so it is included in error reports */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1276 diff changeset	227 #if DEBUG_TRACE
98 297167ef41bd Fix for printing out things with inetd mode when we have DEBUG_TRACE Matt Johnston <matt@ucc.asn.au> parents: 68 diff changeset	228 havetrace = debug_trace;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	229 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	230
1215 d058e15ea213 A few minor style fixes Matt Johnston <matt@ucc.asn.au> parents: 1210 diff changeset	231 if (!opts.usingsyslog \|\| havetrace) {
404 a588558bfc94 Fix potential null pointer dereference found by Klokwork Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	232 struct tm * local_tm = NULL;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	233 timesec = time(NULL);
404 a588558bfc94 Fix potential null pointer dereference found by Klokwork Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	234 local_tm = localtime(&timesec);
a588558bfc94 Fix potential null pointer dereference found by Klokwork Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	235 if (local_tm == NULL
a588558bfc94 Fix potential null pointer dereference found by Klokwork Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	236 \|\| strftime(datestr, sizeof(datestr), "%b %d %H:%M:%S",
618 b5cc8878d5ec Properly fix the bug found years ago by Klocwork, refound again. Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	237 local_tm) == 0)
404 a588558bfc94 Fix potential null pointer dereference found by Klokwork Matt Johnston <matt@ucc.asn.au> parents: 272 diff changeset	238 {
433 c216212001fc Fix for -pedantic -ansi compilation, change // to /*/, plus some signedness Matt Johnston <matt@ucc.asn.au>* parents: 404 diff changeset	239 /* upon failure, just print the epoch-seconds time. */
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 464 diff changeset	240 snprintf(datestr, sizeof(datestr), "%d", (int)timesec);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	241 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	242 fprintf(stderr, "[%d] %s %s\n", getpid(), datestr, printbuf);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	243 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	244 }
5 bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	245
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	246 /* called when the remote side closes the connection */
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	247 static void svr_remoteclosed() {
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	248
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 464 diff changeset	249 m_close(ses.sock_in);
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1355 diff changeset	250 if (ses.sock_in != ses.sock_out) {
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1355 diff changeset	251 m_close(ses.sock_out);
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1355 diff changeset	252 }
479 e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 464 diff changeset	253 ses.sock_in = -1;
e3db1f7a2e43 - Split main socket var into ses.sock_in/ses.sock_out in preparation Matt Johnston <matt@ucc.asn.au> parents: 464 diff changeset	254 ses.sock_out = -1;
5 bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	255 dropbear_close("Exited normally");
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	256
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	257 }
bc6477a6c393 syntactical fixups - it compiles, but channel handling code requires fixing. Matt Johnston <matt@ucc.asn.au> parents: 4 diff changeset	258
1544 d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	259 static void svr_algos_initialise(void) {
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	260 #if DROPBEAR_DH_GROUP1 && DROPBEAR_DH_GROUP1_CLIENTONLY
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	261 algo_type *algo;
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	262 for (algo = sshkex; algo->name; algo++) {
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	263 if (strcmp(algo->name, "diffie-hellman-group1-sha1") == 0) {
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	264 algo->usable = 0;
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	265 }
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	266 }
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	267 #endif
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	268 }
d1a8a05216ff make group1 client-only Matt Johnston <matt@ucc.asn.au> parents: 1495 diff changeset	269

Mercurial > dropbear

annotate svr-session.c @ 1570:67cb1983500b