dropbear: dbutil.c annotate

annotate dbutil.c @ 1802:19b28d2fbe30

fuzz: handle errors from wrapfd_new_dummy()

author	Matt Johnston <matt@ucc.asn.au>
date	Sat, 06 Mar 2021 22:58:57 +0800
parents	a339b1c4b9f2
children	870f6e386a0b

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 * strlcat() is copyright as follows:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	26 * Copyright (c) 1998 Todd C. Miller <[email protected]>
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	27 * All rights reserved.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	28 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	29 * Redistribution and use in source and binary forms, with or without
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	30 * modification, are permitted provided that the following conditions
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	31 * are met:
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	32 * 1. Redistributions of source code must retain the above copyright
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	33 * notice, this list of conditions and the following disclaimer.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	34 * 2. Redistributions in binary form must reproduce the above copyright
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	35 * notice, this list of conditions and the following disclaimer in the
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	36 * documentation and/or other materials provided with the distribution.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	37 * 3. The name of the author may not be used to endorse or promote products
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	38 * derived from this software without specific prior written permission.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	39 *
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	40 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	42 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	43 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	44 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	45 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	46 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	47 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	48 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	49 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	50
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	51 #include "config.h"
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	52
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	53 #ifdef __linux__
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	54 #define _GNU_SOURCE
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	55 /* To call clock_gettime() directly */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	56 #include <sys/syscall.h>
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	57 #endif /* __linux */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	58
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	59 #ifdef HAVE_MACH_MACH_TIME_H
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	60 #include <mach/mach_time.h>
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	61 #include <mach/mach.h>
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	62 #endif
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	63
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	64 #include "includes.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	65 #include "dbutil.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	66 #include "buffer.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	67 #include "session.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	68 #include "atomicio.h"
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	69
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	70 #define MAX_FMT 100
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	71
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	72 static void generic_dropbear_exit(int exitcode, const char* format,
614 00eca37e47e8 Add noreturn and format attribute hints for some functions. Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	73 va_list param) ATTRIB_NORETURN;
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	74 static void generic_dropbear_log(int priority, const char* format,
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	75 va_list param);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	76
614 00eca37e47e8 Add noreturn and format attribute hints for some functions. Matt Johnston <matt@ucc.asn.au> parents: 594 diff changeset	77 void (_dropbear_exit)(int exitcode, const char format, va_list param) ATTRIB_NORETURN
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	78 = generic_dropbear_exit;
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	79 void (_dropbear_log)(int priority, const char format, va_list param)
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	80 = generic_dropbear_log;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	81
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	82 #if DEBUG_TRACE
94 c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	83 int debug_trace = 0;
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	84 #endif
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	85
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	86 #ifndef DISABLE_SYSLOG
1211 6ecc133fb2ee Allow setting syslog identifier via startsyslog(). Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1134 diff changeset	87 void startsyslog(const char *ident) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	88
1211 6ecc133fb2ee Allow setting syslog identifier via startsyslog(). Konstantin Tokarev <ktokarev@smartlabs.tv> parents: 1134 diff changeset	89 openlog(ident, LOG_PID, LOG_AUTHPRIV);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	90
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	91 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	92 #endif /* DISABLE_SYSLOG */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	93
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	94 /* the "format" string must be <= 100 characters */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	95 void dropbear_close(const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	96
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	97 va_list param;
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 va_start(param, format);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	100 _dropbear_exit(EXIT_SUCCESS, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	101 va_end(param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	102
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	103 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	104
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	105 void dropbear_exit(const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	106
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	107 va_list param;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	108
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	109 va_start(param, format);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	110 _dropbear_exit(EXIT_FAILURE, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	111 va_end(param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	112 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	113
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	114 static void generic_dropbear_exit(int exitcode, const char* format,
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	115 va_list param) {
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	116
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	117 char fmtbuf[300];
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	118
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	119 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	120
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	121 _dropbear_log(LOG_INFO, fmtbuf, param);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	122
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1511 diff changeset	123 #if DROPBEAR_FUZZ
1385 6c92e97553f1 Add a flag whether to longjmp, missed that last commit Matt Johnston <matt@ucc.asn.au> parents: 1383 diff changeset	124 if (fuzz.do_jmp) {
1369 ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	125 longjmp(fuzz.jmp, 1);
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	126 }
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	127 #endif
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	128
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	129 exit(exitcode);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	130 }
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	131
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	132 void fail_assert(const char* expr, const char* file, int line) {
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	133 dropbear_exit("Failed assertion (%s:%d): `%s'", file, line, expr);
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	134 }
c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	135
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	136 static void generic_dropbear_log(int UNUSED(priority), const char* format,
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	137 va_list param) {
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	138
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	139 char printbuf[1024];
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	140
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	141 vsnprintf(printbuf, sizeof(printbuf), format, param);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	142
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	143 fprintf(stderr, "%s\n", printbuf);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	144
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	145 }
4 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 /* this is what can be called to write arbitrary log messages */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 void dropbear_log(int priority, const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	149
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150 va_list param;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152 va_start(param, format);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 _dropbear_log(priority, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 va_end(param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	156
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	157
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	158 #if DEBUG_TRACE
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	159
1021 24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	160 static double debug_start_time = -1;
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	161
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	162 void debug_start_net()
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	163 {
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	164 if (getenv("DROPBEAR_DEBUG_NET_TIMESTAMP"))
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	165 {
1250 2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	166 /* Timestamps start from first network activity */
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	167 struct timeval tv;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	168 gettimeofday(&tv, NULL);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	169 debug_start_time = tv.tv_sec + (tv.tv_usec / 1000000.0);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	170 TRACE(("Resetting Dropbear TRACE timestamps"))
1021 24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	171 }
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	172 }
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	173
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	174 static double time_since_start()
257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	175 {
1250 2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	176 double nowf;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	177 struct timeval tv;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	178 gettimeofday(&tv, NULL);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	179 nowf = tv.tv_sec + (tv.tv_usec / 1000000.0);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	180 if (debug_start_time < 0)
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	181 {
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	182 debug_start_time = nowf;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	183 return 0;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	184 }
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	185 return nowf - debug_start_time;
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	186 }
257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	187
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	188 void dropbear_trace(const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 va_list param;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190
1319 21156be2bb26 ses.debug_trace is wrong Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	191 if (!debug_trace) {
94 c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	192 return;
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	193 }
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	194
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	195 va_start(param, format);
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	196 fprintf(stderr, "TRACE (%d) %f: ", getpid(), time_since_start());
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	197 vfprintf(stderr, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	198 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 va_end(param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 }
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	201
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	202 void dropbear_trace2(const char* format, ...) {
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	203 static int trace_env = -1;
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	204 va_list param;
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	205
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	206 if (trace_env == -1) {
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	207 trace_env = getenv("DROPBEAR_TRACE2") ? 1 : 0;
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	208 }
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	209
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	210 if (!(debug_trace && trace_env)) {
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	211 return;
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	212 }
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	213
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	214 va_start(param, format);
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	215 fprintf(stderr, "TRACE2 (%d) %f: ", getpid(), time_since_start());
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	216 vfprintf(stderr, format, param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	217 fprintf(stderr, "\n");
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	218 va_end(param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	219 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	220 #endif /* DEBUG_TRACE */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221
547 cf376c696dfc Make it compile, update for changes in channel structure. Matt Johnston <matt@ucc.asn.au> parents: 500 diff changeset	222 /* Connect to a given unix socket. The socket is blocking */
1499 2d450c1056e3 options: Complete the transition to numeric toggles (`#if') Michael Witten <mfwitten@gmail.com> parents: 1468 diff changeset	223 #if ENABLE_CONNECT_UNIX
550 61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	224 int connect_unix(const char* path) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	225 struct sockaddr_un addr;
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	226 int fd = -1;
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	227
550 61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	228 memset((void*)&addr, 0x0, sizeof(addr));
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	229 addr.sun_family = AF_UNIX;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	230 strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	231 fd = socket(PF_UNIX, SOCK_STREAM, 0);
550 61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	232 if (fd < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	233 TRACE(("Failed to open unix socket"))
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	234 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	235 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	236 if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	237 TRACE(("Failed to connect to '%s' socket", path))
615 e3ac0a426bd0 Fix FD leak if connect() fails, found by Klocwork Matt Johnston <matt@ucc.asn.au> parents: 614 diff changeset	238 m_close(fd);
550 61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	239 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	240 }
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	241 return fd;
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	242 }
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	243 #endif
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	244
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	245 /* Sets up a pipe for a, returning three non-blocking file descriptors
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	246 * and the pid. exec_fn is the function that will actually execute the child process,
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	247 * it will be run after the child has fork()ed, and is passed exec_data.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	248 * If ret_errfd == NULL then stderr will not be captured.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	249 * ret_pid can be passed as NULL to discard the pid. */
1460 58a74cb829b8 Pointer parameter could be declared as pointing to const (callback) Francois Perrad <francois.perrad@gadz.org> parents: 1343 diff changeset	250 int spawn_command(void(exec_fn)(const void user_data), const void *exec_data,
482 7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	251 int ret_writefd, int ret_readfd, int ret_errfd, pid_t ret_pid) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	252 int infds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	253 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	254 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	255 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	256
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	257 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	258 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	259
1740 dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	260 #if DROPBEAR_FUZZ
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	261 if (fuzz.fuzzing) {
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	262 return fuzz_spawn_command(ret_writefd, ret_readfd, ret_errfd, ret_pid);
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	263 }
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	264 #endif
dfbe947bdf0d Make wrapfd share a common buffer for all FDs Matt Johnston <matt@ucc.asn.au> parents: 1622 diff changeset	265
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	266 /* redirect stdin/stdout/stderr */
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	267 if (pipe(infds) != 0) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	268 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	269 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	270 if (pipe(outfds) != 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	271 return DROPBEAR_FAILURE;
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	272 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	273 if (ret_errfd && pipe(errfds) != 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	274 return DROPBEAR_FAILURE;
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	275 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	276
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	277 #if DROPBEAR_VFORK
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	278 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	279 #else
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	280 pid = fork();
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	281 #endif
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	282
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	283 if (pid < 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	284 return DROPBEAR_FAILURE;
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	285 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	286
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	287 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	288 /* child */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	289
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	290 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	291 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	292 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	293 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	294 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	295
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	296 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	297
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	298 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) \|\|
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	299 (dup2(outfds[FDOUT], STDOUT_FILENO) < 0) \|\|
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	300 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	301 TRACE(("leave noptycommand: error redirecting FDs"))
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	302 dropbear_exit("Child dup2() failure");
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	303 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	304
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	305 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	306 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	307 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	308 close(outfds[FDOUT]);
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	309 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	310 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	311 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	312 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	313 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	314
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	315 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	316 /* not reached */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	317 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	318 } else {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	319 /* parent */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	320 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	321 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	322
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	323 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	324 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	325
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	326 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	327 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	328 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	329 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	330
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	331 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	332 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	333 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	334
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	335 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	336 *ret_readfd = outfds[FDIN];
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	337 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	338 *ret_errfd = errfds[FDIN];
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	339 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	340 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	341 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	342 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	343
482 7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	344 /* Runs a command with "sh -c". Will close FDs (except stdin/stdout/stderr) and
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	345 * re-enabled SIGPIPE. If cmd is NULL, will run a login shell.
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	346 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	347 void run_shell_command(const char* cmd, unsigned int maxfd, char* usershell) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	348 char * argv[4];
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	349 char * baseshell = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	350 unsigned int i;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	351
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	352 baseshell = basename(usershell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	353
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	354 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	355 argv[0] = baseshell;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	356 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	357 /* a login shell should be "-bash" for "/bin/bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	358 int len = strlen(baseshell) + 2; /* 2 for "-" */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	359 argv[0] = (char*)m_malloc(len);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	360 snprintf(argv[0], len, "-%s", baseshell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	361 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	362
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	363 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	364 argv[1] = "-c";
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	365 argv[2] = (char*)cmd;
482 7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	366 argv[3] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	367 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	368 /* construct a shell of the form "-bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	369 argv[1] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	370 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	371
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	372 /* Re-enable SIGPIPE for the executed process */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	373 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	374 dropbear_exit("signal() error");
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	375 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	376
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	377 /* close file descriptors except stdin/stdout/stderr
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	378 * Need to be sure FDs are closed here to avoid reading files as root */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	379 for (i = 3; i <= maxfd; i++) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	380 m_close(i);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	381 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	382
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	383 execv(usershell, argv);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	384 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	385
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	386 #if DEBUG_TRACE
198 65585699d980 * add a "label" argument to printhex() Matt Johnston <matt@ucc.asn.au> parents: 173 diff changeset	387 void printhex(const char * label, const unsigned char * buf, int len) {
1764 a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	388 int i, j;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389
198 65585699d980 * add a "label" argument to printhex() Matt Johnston <matt@ucc.asn.au> parents: 173 diff changeset	390 fprintf(stderr, "%s\n", label);
1764 a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	391 /* for each 16 byte line */
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	392 for (j = 0; j < len; j += 16) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	393 const int linelen = MIN(16, len - j);
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	394
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	395 /* print hex digits */
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	396 for (i = 0; i < 16; i++) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	397 if (i < linelen) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	398 fprintf(stderr, "%02x", buf[j+i]);
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	399 } else {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	400 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	401 }
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	402 // separator between pairs
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	403 if (i % 2 ==1) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	404 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	405 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406 }
1764 a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	407
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	408 /* print characters */
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	409 fprintf(stderr, " ");
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	410 for (i = 0; i < linelen; i++) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	411 char c = buf[j+i];
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	412 if (!isprint(c)) {
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	413 c = '.';
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	414 }
a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	415 fputc(c, stderr);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 }
1764 a339b1c4b9f2 Print ascii in printhex too Matt Johnston <matt@ucc.asn.au> parents: 1740 diff changeset	417 fprintf(stderr, "\n");
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 }
764 2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	420
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	421 void printmpint(const char label, mp_int mp) {
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	422 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	423 buf_putmpint(buf, mp);
1432 41dca1e5ea34 fix dss debug printing Matt Johnston <matt@ucc.asn.au> parents: 1385 diff changeset	424 fprintf(stderr, "%d bits ", mp_count_bits(mp));
764 2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	425 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	426 buf_free(buf);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	427
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	428 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	430
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 /* Strip all control characters from text (a null-terminated string), except
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433 * The result returned is a newly allocated string, this must be free()d after
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 * use */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	435 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	436
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 char * ret;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	439 int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	442 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	443
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	444 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	447 \|\| text[i] == '\n' \|\| text[i] == '\r' \|\| text[i] == '\t') {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449 pos++;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	452 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	453 return ret;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	454 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	455
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	456
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	457 /* reads the contents of filename into the buffer buf, from the current
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	458 * position, either to the end of the file, or the buffer being full.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	459 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	461
357 9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	462 int fd = -1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	463 int len;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	464 int maxlen;
358 e81d3bc1dc78 Forgot variable declaration. Matt Johnston <matt@ucc.asn.au> parents: 357 diff changeset	465 int ret = DROPBEAR_FAILURE;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	466
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	467 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	468
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 if (fd < 0) {
357 9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	470 goto out;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	471 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	472
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	473 do {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	474 maxlen = buf->size - buf->pos;
357 9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	475 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	476 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	477 if (errno == EINTR \|\| errno == EAGAIN) {
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	478 continue;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	479 }
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	480 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	481 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	482 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	483 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	484
357 9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	485 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	486
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	487 out:
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	488 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	489 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	490 }
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	491 return ret;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	492 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	493
51 095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	494 /* get a line from the file into buffer in the style expected for an
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	495 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	496 * Will return DROPBEAR_SUCCESS if data is read, or DROPBEAR_FAILURE on EOF.*/
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	497 /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	498 #if DROPBEAR_CLIENT \|\| DROPBEAR_SVR_PUBKEY_AUTH
51 095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	499 int buf_getline(buffer * line, FILE * authfile) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	500
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	501 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	502
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	503 buf_setpos(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	504 buf_setlen(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	505
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	506 while (line->pos < line->size) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	507
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	508 c = fgetc(authfile); /getc() is weird with some uClibc systems/
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	509 if (c == EOF \|\| c == '\n' \|\| c == '\r') {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	510 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	511 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	512
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	513 buf_putbyte(line, (unsigned char)c);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	514 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	515
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 161 diff changeset	516 TRACE(("leave getauthline: line too long"))
51 095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	517 /* We return success, but the line length will be zeroed - ie we just
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	518 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	519 buf_setlen(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	520
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	521 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	522
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	523
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	524 /* if we didn't read anything before EOF or error, exit */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	525 if (c == EOF && line->pos == 0) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	526 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	527 } else {
117 e0acad552a92 Read the last line of a file without a finishing '\n' correctly Matt Johnston <matt@ucc.asn.au> parents: 109 diff changeset	528 buf_setpos(line, 0);
51 095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	529 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	530 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	531
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	532 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	533 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	534
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	535 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	536 void m_close(int fd) {
1038 d3925ed45a85 Fix for old compilers, variable declarations at beginning of functions Thorsten Horstmann <thorsten.horstmann@web.de> parents: 1022 diff changeset	537 int val;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	538
1453 336cae2238ca test close < 0, from Marco Wenzel Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	539 if (fd < 0) {
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	540 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	541 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	542
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	543 do {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	544 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	545 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	546
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	547 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	548 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	549 dropbear_exit("Error closing fd %d, %s", fd, strerror(errno));
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	550 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	551 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	552
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	553 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	554
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 161 diff changeset	555 TRACE(("setnonblocking: %d", fd))
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	556
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1511 diff changeset	557 #if DROPBEAR_FUZZ
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	558 if (fuzz.fuzzing) {
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	559 return;
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	560 }
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	561 #endif
f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	562
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	563 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
173 257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	564 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	565 /* Some devices (like /dev/null redirected in)
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	566 * can't be set to non-blocking */
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	567 TRACE(("ignoring ENODEV for setnonblocking"))
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	568 } else {
1383 f03cfe9c76ac Disable setnonblocking(), get_socket_address(), set_sock_priority() Matt Johnston <matt@ucc.asn.au> parents: 1375 diff changeset	569 {
173 257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	570 dropbear_exit("Couldn't set nonblocking");
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	571 }
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	572 }
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	573 }
165 0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place Matt Johnston <matt@ucc.asn.au> parents: 161 diff changeset	574 TRACE(("leave setnonblocking"))
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	575 }
425 1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	576
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	577 void disallow_core() {
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	578 struct rlimit lim;
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	579 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	580 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	581 }
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	582
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	583 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE, with the result in val /
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	584 int m_str_to_uint(const char* str, unsigned int *val) {
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	585 unsigned long l;
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	586 errno = 0;
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	587 l = strtoul(str, NULL, 10);
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	588 /* The c99 spec doesn't actually seem to define EINVAL, but most platforms
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	589 * I've looked at mention it in their manpage */
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	590 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	591 \|\| (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	592 \|\| (l > UINT_MAX)) {
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	593 return DROPBEAR_FAILURE;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	594 } else {
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	595 *val = l;
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	596 return DROPBEAR_SUCCESS;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	597 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	598 }
817 a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	599
1134 36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	600 /* Returns malloced path. inpath beginning with '/' is returned as-is,
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	601 otherwise home directory is prepended */
36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	602 char * expand_homedir_path(const char *inpath) {
995 6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	603 struct passwd *pw = NULL;
1134 36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	604 if (inpath[0] != '/') {
995 6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	605 pw = getpwuid(getuid());
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	606 if (pw && pw->pw_dir) {
1134 36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	607 int len = strlen(inpath) + strlen(pw->pw_dir) + 2;
995 6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	608 char *buf = m_malloc(len);
1134 36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	609 snprintf(buf, len, "%s/%s", pw->pw_dir, inpath);
995 6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	610 return buf;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	611 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	612 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	613
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	614 /* Fallback */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	615 return m_strdup(inpath);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	616 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	617
817 a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	618 int constant_time_memcmp(const void* a, const void *b, size_t n)
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	619 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	620 const char xa = a, xb = b;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	621 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	622 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	623 for (i = 0; i < n; i++)
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	624 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	625 c \|= (xa[i] ^ xb[i]);
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	626 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	627 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	628 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	629
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	630 /* higher-resolution monotonic timestamp, falls back to gettimeofday */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	631 void gettime_wrapper(struct timespec *now) {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	632 struct timeval tv;
1558 2f64cb3d3007 - #if not #ifdef for DROPBEAR_FUZZ Matt Johnston <matt@ucc.asn.au> parents: 1511 diff changeset	633 #if DROPBEAR_FUZZ
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	634 if (fuzz.fuzzing) {
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	635 /* time stands still when fuzzing */
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	636 now->tv_sec = 5;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	637 now->tv_nsec = 0;
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	638 }
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	639 #endif
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	640
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	641 #if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	642 /* POSIX monotonic clock. Newer Linux, BSD, MacOSX >10.12 */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	643 if (clock_gettime(CLOCK_MONOTONIC, now) == 0) {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	644 return;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	645 }
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	646 #endif
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	647
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	648 #if defined(__linux__) && defined(SYS_clock_gettime)
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	649 {
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	650 /* Old linux toolchain - kernel might support it but not the build headers */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	651 /* Also glibc <2.17 requires -lrt which we neglect to add */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	652 static int linux_monotonic_failed = 0;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	653 if (!linux_monotonic_failed) {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	654 /* CLOCK_MONOTONIC isn't in some headers */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	655 int clock_source_monotonic = 1;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	656 if (syscall(SYS_clock_gettime, clock_source_monotonic, now) == 0) {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	657 return;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	658 } else {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	659 /* Don't try again */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	660 linux_monotonic_failed = 1;
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	661 }
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	662 }
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	663 }
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	664 #endif /* linux fallback clock_gettime */
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	665
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	666 #if defined(HAVE_MACH_ABSOLUTE_TIME)
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	667 {
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	668 /* OS X pre 10.12, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */
930 8f04e36622c0 Fix monotonic_now() on OS X Matt Johnston <matt@ucc.asn.au> parents: 928 diff changeset	669 static mach_timebase_info_data_t timebase_info;
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	670 uint64_t scaled_time;
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	671 if (timebase_info.denom == 0) {
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	672 mach_timebase_info(&timebase_info);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	673 }
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	674 scaled_time = mach_absolute_time() * timebase_info.numer / timebase_info.denom;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	675 now->tv_sec = scaled_time / 1000000000;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	676 now->tv_nsec = scaled_time % 1000000000;
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	677 }
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	678 #endif /* osx mach_absolute_time */
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	679
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	680 /* Fallback for everything else - this will sometimes go backwards */
1622 e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	681 gettimeofday(&tv, NULL);
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	682 now->tv_sec = tv.tv_sec;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	683 now->tv_nsec = 1000*tv.tv_usec;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	684 }
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	685
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	686 /* second-resolution monotonic timestamp */
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	687 time_t monotonic_now() {
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	688 struct timespec ts;
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	689 gettime_wrapper(&ts);
e11ed628708b - Add adaptive authentication failure delay Matt Johnston <matt@ucc.asn.au> parents: 1575 diff changeset	690 return ts.tv_sec;
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	691 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	692
1329 185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	693 void fsync_parent_dir(const char* fn) {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	694 #ifdef HAVE_LIBGEN_H
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	695 char *fn_dir = m_strdup(fn);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	696 char *dir = dirname(fn_dir);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	697 int dirfd = open(dir, O_RDONLY);
1024 aac0095dc3b4 work in progress for async connect Matt Johnston <matt@ucc.asn.au> parents: 1023 diff changeset	698
1329 185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	699 if (dirfd != -1) {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	700 if (fsync(dirfd) != 0) {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	701 TRACE(("fsync of directory %s failed: %s", dir, strerror(errno)))
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	702 }
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	703 m_close(dirfd);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	704 } else {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	705 TRACE(("error opening directory %s for fsync: %s", dir, strerror(errno)))
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	706 }
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	707
1575 e75dab5bec71 some linting after fuzz merge (#60) François Perrad <francois.perrad@gadz.org> parents: 1559 diff changeset	708 m_free(fn_dir);
1329 185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	709 #endif
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	710 }

Mercurial > dropbear

annotate dbutil.c @ 1802:19b28d2fbe30