dropbear: dbutil.c annotate

annotate dbutil.c @ 1375:d8215479a58a fuzz

fuzzing has a constant time

author	Matt Johnston <matt@ucc.asn.au>
date	Thu, 25 May 2017 22:20:10 +0800
parents	ddfcadca3c4c
children	f03cfe9c76ac

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
1369 ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	123 #ifdef DROPBEAR_FUZZ
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	124 // longjmp before cleaning up svr_opts
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	125 if (fuzz.fuzzing) {
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	126 longjmp(fuzz.jmp, 1);
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	127 }
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	128 #endif
ddfcadca3c4c fuzzer-pubkey Matt Johnston <matt@ucc.asn.au> parents: 1361 diff changeset	129
73 0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	130 exit(exitcode);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	131 }
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	132
241 c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	133 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	134 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	135 }
c5d3ef11155f * use own assertions which should get logged properly Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	136
108 10f4d3319780 - added circular buffering for channels Matt Johnston <matt@ucc.asn.au> parents: 107 diff changeset	137 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	138 va_list param) {
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	139
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	140 char printbuf[1024];
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	141
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	142 vsnprintf(printbuf, sizeof(printbuf), format, param);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	143
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	144 fprintf(stderr, "%s\n", printbuf);
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	145
0bf5cebe622c Dropbearkey can now print out pubkey portions Matt Johnston <matt@ucc.asn.au> parents: 70 diff changeset	146 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	147
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	148 /* 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	149 void dropbear_log(int priority, const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	150
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	151 va_list param;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	152
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	153 va_start(param, format);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	154 _dropbear_log(priority, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	155 va_end(param);
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
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	158
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	159 #if DEBUG_TRACE
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	160
1021 24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	161 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	162
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	163 void debug_start_net()
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	164 {
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	165 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	166 {
1250 2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	167 /* Timestamps start from first network activity */
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	168 struct timeval tv;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	169 gettimeofday(&tv, NULL);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	170 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	171 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	172 }
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	173 }
24135c8e1d46 Add envirnonment variable for debug timestamps to roughly match Matt Johnston <matt@ucc.asn.au> parents: 1018 diff changeset	174
1016 257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	175 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	176 {
1250 2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	177 double nowf;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	178 struct timeval tv;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	179 gettimeofday(&tv, NULL);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	180 nowf = tv.tv_sec + (tv.tv_usec / 1000000.0);
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	181 if (debug_start_time < 0)
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	182 {
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	183 debug_start_time = nowf;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	184 return 0;
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	185 }
2bb4c662d1c2 more hard tab Francois Perrad <francois.perrad@gadz.org> parents: 1211 diff changeset	186 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	187 }
257f7d5fca97 piggyback data on acks when making connections on linux Matt Johnston <matt@ucc.asn.au> parents: 995 diff changeset	188
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	189 void dropbear_trace(const char* format, ...) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	190 va_list param;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	191
1319 21156be2bb26 ses.debug_trace is wrong Matt Johnston <matt@ucc.asn.au> parents: 1295 diff changeset	192 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	193 return;
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	194 }
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline Matt Johnston <matt@ucc.asn.au> parents: 73 diff changeset	195
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	196 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	197 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	198 vfprintf(stderr, format, param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	199 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	200 va_end(param);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	201 }
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	202
731 9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	203 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	204 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	205 va_list param;
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	206
753 d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	207 if (trace_env == -1) {
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	208 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	209 }
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	210
d63ef1e211ea Take transmit and receive keys into use separately Matt Johnston <matt@ucc.asn.au> parents: 731 diff changeset	211 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	212 return;
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
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	215 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	216 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	217 vfprintf(stderr, format, param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	218 fprintf(stderr, "\n");
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	219 va_end(param);
9a5438271556 Move the more verbose TRACE() statements into TRACE2() Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	220 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	221 #endif /* DEBUG_TRACE */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	222
547 cf376c696dfc Make it compile, update for changes in channel structure. Matt Johnston <matt@ucc.asn.au> parents: 500 diff changeset	223 /* Connect to a given unix socket. The socket is blocking */
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	224 #ifdef 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	225 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	226 struct sockaddr_un addr;
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	227 int fd = -1;
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	228
550 61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	229 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	230 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	231 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	232 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	233 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	234 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	235 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	236 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	237 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	238 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	239 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	240 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys. Matt Johnston <matt@ucc.asn.au> parents: 547 diff changeset	241 }
225 ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	242 return fd;
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	243 }
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	244 #endif
ca7e76d981d9 - progress towards client agent forwarding Matt Johnston <matt@ucc.asn.au> parents: 198 diff changeset	245
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	246 /* 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	247 * 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	248 * 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	249 * 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	250 * ret_pid can be passed as NULL to discard the pid. */
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	251 int spawn_command(void(exec_fn)(void user_data), 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	252 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	253 int infds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	254 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	255 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	256 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	257
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	258 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	259 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	260
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	261 /* 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	262 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	263 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	264 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	265 if (pipe(outfds) != 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	266 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	267 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	268 if (ret_errfd && pipe(errfds) != 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	269 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	270 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	271
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	272 #if DROPBEAR_VFORK
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	273 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	274 #else
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	275 pid = fork();
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	276 #endif
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	277
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	278 if (pid < 0) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	279 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	280 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	281
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	282 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	283 /* child */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	284
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	285 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	286 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	287 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	288 dropbear_exit("signal() error");
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
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	291 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	292
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	293 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) \|\|
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	294 (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	295 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	296 TRACE(("leave noptycommand: error redirecting FDs"))
594 a98a2138364a Improve capitalisation for all logged strings Matt Johnston <matt@ucc.asn.au> parents: 568 diff changeset	297 dropbear_exit("Child dup2() failure");
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	298 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	299
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	300 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	301 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	302 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	303 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	304 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	305 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	306 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	307 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	308 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	309
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	310 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	311 /* not reached */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	312 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	313 } else {
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	314 /* parent */
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	315 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	316 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	317
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	318 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	319 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	320
484 effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	321 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	322 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	323 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	324 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	325
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	326 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	327 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	328 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	329
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	330 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	331 *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	332 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode Matt Johnston <matt@ucc.asn.au> parents: 482 diff changeset	333 *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	334 }
481 357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	335 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	336 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	337 }
357a2e2e9bcc - Generalise spawn_command function Matt Johnston <matt@ucc.asn.au> parents: 433 diff changeset	338
482 7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	339 /* 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	340 * 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	341 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	342 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	343 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	344 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	345 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	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 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	348
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	349 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	350 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	351 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	352 /* 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	353 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	354 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	355 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	356 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	357
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	358 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	359 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	360 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	361 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	362 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	363 /* 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	364 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	365 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	366
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	367 /* 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	368 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	369 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	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 /* 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	373 * 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	374 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	375 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	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
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	378 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	379 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling Matt Johnston <matt@ucc.asn.au> parents: 481 diff changeset	380
1295 750ec4ec4cbe Convert #ifdef to #if, other build changes Matt Johnston <matt@ucc.asn.au> parents: 1283 diff changeset	381 #if DEBUG_TRACE
198 65585699d980 * add a "label" argument to printhex() Matt Johnston <matt@ucc.asn.au> parents: 173 diff changeset	382 void printhex(const char * label, const unsigned char * buf, int len) {
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	383
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	384 int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	385
198 65585699d980 * add a "label" argument to printhex() Matt Johnston <matt@ucc.asn.au> parents: 173 diff changeset	386 fprintf(stderr, "%s\n", label);
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	387 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	388 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	389 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	390 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	391 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	392 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	393 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	394 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	395 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	396 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	397 }
764 2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	398
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	399 void printmpint(const char label, mp_int mp) {
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	400 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	401 buf_putmpint(buf, mp);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	402 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	403 buf_free(buf);
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	404
2202e854d187 add printmpint() for debugging Matt Johnston <matt@ucc.asn.au> parents: 667 diff changeset	405 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	406 #endif
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	407
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	408 /* 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	409 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	410 * 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	411 * use */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	412 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	413
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	414 char * ret;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	415 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	416 int i;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	417
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	418 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	419 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	420
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	421 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	422 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	423 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	424 \|\| 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	425 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	426 pos++;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	427 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	428 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	429 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	430 return ret;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	431 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	432
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	433
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	434 /* 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	435 * 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	436 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	437 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	438
357 9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	439 int fd = -1;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	440 int len;
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	441 int maxlen;
358 e81d3bc1dc78 Forgot variable declaration. Matt Johnston <matt@ucc.asn.au> parents: 357 diff changeset	442 int ret = DROPBEAR_FAILURE;
4 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 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	445
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	446 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	447 goto out;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	448 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	449
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	450 do {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	451 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	452 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	453 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	454 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	455 continue;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	456 }
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	457 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	458 }
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	459 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	460 } while (len < maxlen && len > 0);
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 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	463
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	464 out:
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	465 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	466 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	467 }
9e2ad1023978 Handle failure reading a file (such as a key file) Matt Johnston <matt@ucc.asn.au> parents: 335 diff changeset	468 return ret;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	469 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	470
51 095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	471 /* 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	472 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	473 * 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	474 /* 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	475 #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	476 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	477
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	478 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	479
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	480 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	481 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	482
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	483 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	484
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	485 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	486 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	487 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	488 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	489
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	490 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	491 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	492
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	493 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	494 /* 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	495 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	496 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	497
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	498 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	499
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 /* 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	502 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	503 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	504 } 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	505 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	506 return DROPBEAR_SUCCESS;
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
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	509 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	510 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet. Matt Johnston <matt@ucc.asn.au> parents: 45 diff changeset	511
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	512 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	513 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	514 int val;
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	515
883 ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	516 if (fd == -1) {
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	517 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	518 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default Matt Johnston <matt@ucc.asn.au> parents: 871 diff changeset	519
4 fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	520 do {
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	521 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	522 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	523
277 044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	524 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	525 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits Matt Johnston <matt@ucc.asn.au> parents: 258 diff changeset	526 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	527 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	528 }
fe6bca95afa7 Makefile.in contains updated files required Matt Johnston <matt@ucc.asn.au> parents: diff changeset	529
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	530 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	531
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	532 TRACE(("setnonblocking: %d", fd))
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	533
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	534 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	535 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	536 /* 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	537 * 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	538 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	539 } else {
1358 6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	540 #ifdef DROPBEAR_FUZZ
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	541 if (fuzz.fuzzing)
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	542 {
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	543 TRACE(("fuzzing ignore setnonblocking failure for %d", fd))
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	544 }
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	545 else
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	546 #endif
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	547 {
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	548 dropbear_exit("Couldn't set nonblocking");
6b89eb92f872 glaring wrapfd problems fixed Matt Johnston <matt@ucc.asn.au> parents: 1343 diff changeset	549 }
173 257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker Matt Johnston <matt@ucc.asn.au> parents: 172 diff changeset	550 }
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	551 }
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	552 TRACE(("leave setnonblocking"))
109 2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b Matt Johnston <matt@ucc.asn.au> parents: 108 diff changeset	553 }
425 1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	554
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	555 void disallow_core() {
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	556 struct rlimit lim;
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	557 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	558 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps Matt Johnston <matt@ucc.asn.au> parents: 410 diff changeset	559 }
492 b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	560
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	561 /* 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	562 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	563 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	564 errno = 0;
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	565 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	566 /* 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	567 * I've looked at mention it in their manpage */
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	568 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	569 \|\| (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	570 \|\| (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	571 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	572 } else {
864 30ab30e46452 Fix some warnings Matt Johnston <matt@ucc.asn.au> parents: 835 diff changeset	573 *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	574 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	575 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint() Matt Johnston <matt@ucc.asn.au> parents: 490 diff changeset	576 }
817 a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	577
1134 36557295418e change DROPBEAR_DEFAULT_CLI_AUTHKEY to just prepend homedir Matt Johnston <matt@ucc.asn.au> parents: 1049 diff changeset	578 /* 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	579 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	580 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	581 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	582 if (inpath[0] != '/') {
995 6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	583 pw = getpwuid(getuid());
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	584 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	585 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	586 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	587 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	588 return buf;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	589 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	590 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	591
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	592 /* Fallback */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	593 return m_strdup(inpath);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	594 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear Matt Johnston <matt@ucc.asn.au> parents: 962 diff changeset	595
817 a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	596 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	597 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	598 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	599 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	600 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	601 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	602 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	603 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	604 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	605 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	606 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt Matt Johnston <matt@ucc.asn.au> parents: 753 diff changeset	607
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	608 #if defined(__linux__) && defined(SYS_clock_gettime)
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	609 /* CLOCK_MONOTONIC_COARSE was added in Linux 2.6.32 but took a while to
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	610 reach userspace include headers */
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	611 #ifndef CLOCK_MONOTONIC_COARSE
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	612 #define CLOCK_MONOTONIC_COARSE 6
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	613 #endif
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	614 static clockid_t get_linux_clock_source() {
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	615 struct timespec ts;
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	616 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC_COARSE, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	617 return CLOCK_MONOTONIC_COARSE;
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	618 }
953 356a25a108a3 Fix some format string warnings Matt Johnston <matt@ucc.asn.au> parents: 952 diff changeset	619
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	620 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	621 return CLOCK_MONOTONIC;
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	622 }
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	623 return -1;
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	624 }
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	625 #endif
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	626
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	627 time_t monotonic_now() {
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	628 #ifdef DROPBEAR_FUZZ
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	629 if (fuzz.fuzzing) {
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	630 /* time stands still when fuzzing */
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	631 return 5;
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	632 }
d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	633 #endif
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	634 #if defined(__linux__) && defined(SYS_clock_gettime)
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	635 {
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	636 static clockid_t clock_source = -2;
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	637
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	638 if (clock_source == -2) {
953 356a25a108a3 Fix some format string warnings Matt Johnston <matt@ucc.asn.au> parents: 952 diff changeset	639 /* First run, find out which one works.
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	640 -1 will fall back to time() */
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	641 clock_source = get_linux_clock_source();
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	642 }
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	643
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	644 if (clock_source >= 0) {
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	645 struct timespec ts;
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	646 if (syscall(SYS_clock_gettime, clock_source, &ts) != 0) {
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	647 /* Intermittent clock failures should not happen */
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	648 dropbear_exit("Clock broke");
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	649 }
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	650 return ts.tv_sec;
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	651 }
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	652 }
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	653 #endif /* linux clock_gettime */
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	654
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	655 #if defined(HAVE_MACH_ABSOLUTE_TIME)
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	656 {
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	657 /* OS X, 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	658 static mach_timebase_info_data_t timebase_info;
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	659 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	660 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	661 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	662 return mach_absolute_time() * timebase_info.numer / timebase_info.denom
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	663 / 1e9;
1375 d8215479a58a fuzzing has a constant time Matt Johnston <matt@ucc.asn.au> parents: 1369 diff changeset	664 }
952 ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	665 #endif /* osx mach_absolute_time */
ef8d939de3dd Fix clock_gettime handling Matt Johnston <matt@ucc.asn.au> parents: 936 diff changeset	666
928 7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	667 /* Fallback for everything else - this will sometimes go backwards */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	668 return time(NULL);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	669 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by Matt Johnston <matt@ucc.asn.au> parents: 883 diff changeset	670
1329 185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	671 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	672 #ifdef HAVE_LIBGEN_H
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	673 char *fn_dir = m_strdup(fn);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	674 char *dir = dirname(fn_dir);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	675 int dirfd = open(dir, O_RDONLY);
1024 aac0095dc3b4 work in progress for async connect Matt Johnston <matt@ucc.asn.au> parents: 1023 diff changeset	676
1329 185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	677 if (dirfd != -1) {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	678 if (fsync(dirfd) != 0) {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	679 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	680 }
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	681 m_close(dirfd);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	682 } else {
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	683 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	684 }
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	685
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	686 free(fn_dir);
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	687 #endif
185c14fa504d Use atomic key generation in all cases Matt Johnston <matt@ucc.asn.au> parents: 1319 diff changeset	688 }

Mercurial > dropbear

annotate dbutil.c @ 1375:d8215479a58a fuzz