blob: 19a132bd91ce44e8e715045fa151401936c8ea97 [file] [log] [blame]
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +00001/* $OpenBSD: sftp-server.c,v 1.114 2019/01/16 23:22:10 djm Exp $ */
Damien Miller7b28dc52000-09-05 13:34:53 +11002/*
Darren Tucker37bd3662004-02-24 09:19:15 +11003 * Copyright (c) 2000-2004 Markus Friedl. All rights reserved.
Damien Miller7b28dc52000-09-05 13:34:53 +11004 *
Darren Tucker37bd3662004-02-24 09:19:15 +11005 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
Damien Miller7b28dc52000-09-05 13:34:53 +11008 *
Darren Tucker37bd3662004-02-24 09:19:15 +11009 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Damien Miller7b28dc52000-09-05 13:34:53 +110016 */
Damien Millerd7834352006-08-05 12:39:39 +100017
Damien Miller7b28dc52000-09-05 13:34:53 +110018#include "includes.h"
Damien Millerf17883e2006-03-15 11:45:54 +110019
20#include <sys/types.h>
21#include <sys/stat.h>
Damien Miller9aec9192006-08-05 10:57:45 +100022#ifdef HAVE_SYS_TIME_H
23# include <sys/time.h>
24#endif
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100025#ifdef HAVE_SYS_MOUNT_H
Damien Millerd671e5a2008-05-19 14:53:33 +100026#include <sys/mount.h>
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100027#endif
28#ifdef HAVE_SYS_STATVFS_H
Damien Millerd671e5a2008-05-19 14:53:33 +100029#include <sys/statvfs.h>
Darren Tucker5b2e2ba2008-06-08 09:25:28 +100030#endif
Damien Miller88f254b2006-03-15 11:25:13 +110031
32#include <dirent.h>
Darren Tucker39972492006-07-12 22:22:46 +100033#include <errno.h>
Damien Miller57cf6382006-07-10 21:13:46 +100034#include <fcntl.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100035#include <pwd.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100036#include <stdlib.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100037#include <stdio.h>
Damien Millere3476ed2006-07-24 14:13:33 +100038#include <string.h>
Damien Miller5598b4f2006-07-24 14:09:40 +100039#include <time.h>
Damien Millere3476ed2006-07-24 14:13:33 +100040#include <unistd.h>
Damien Millerd7834352006-08-05 12:39:39 +100041#include <stdarg.h>
Damien Miller7b28dc52000-09-05 13:34:53 +110042
Damien Miller7b28dc52000-09-05 13:34:53 +110043#include "xmalloc.h"
djm@openbsd.org7d845f42015-01-14 13:54:13 +000044#include "sshbuf.h"
45#include "ssherr.h"
Damien Millerd7834352006-08-05 12:39:39 +100046#include "log.h"
Darren Tuckerce321d82005-10-03 18:11:24 +100047#include "misc.h"
Damien Miller6eaeebf2013-10-15 11:55:57 +110048#include "match.h"
Damien Millerfef95ad2006-07-10 20:46:55 +100049#include "uidswap.h"
Damien Miller7b28dc52000-09-05 13:34:53 +110050
Ben Lindstrom2f959b42001-01-11 06:20:23 +000051#include "sftp.h"
Damien Miller33804262001-02-04 23:20:18 +110052#include "sftp-common.h"
Damien Miller7b28dc52000-09-05 13:34:53 +110053
Damien Millerfef95ad2006-07-10 20:46:55 +100054/* Our verbosity */
Damien Miller6eaeebf2013-10-15 11:55:57 +110055static LogLevel log_level = SYSLOG_LEVEL_ERROR;
Damien Millerfef95ad2006-07-10 20:46:55 +100056
57/* Our client */
Damien Miller6eaeebf2013-10-15 11:55:57 +110058static struct passwd *pw = NULL;
59static char *client_addr = NULL;
Ben Lindstrom49a79c02000-11-17 03:47:20 +000060
Damien Miller7b28dc52000-09-05 13:34:53 +110061/* input and output queue */
djm@openbsd.org7d845f42015-01-14 13:54:13 +000062struct sshbuf *iqueue;
63struct sshbuf *oqueue;
Damien Miller7b28dc52000-09-05 13:34:53 +110064
Damien Miller058316f2001-03-08 10:08:49 +110065/* Version of client */
Damien Miller6eaeebf2013-10-15 11:55:57 +110066static u_int version;
67
68/* SSH2_FXP_INIT received */
69static int init_done;
Damien Miller058316f2001-03-08 10:08:49 +110070
Darren Tuckerdb7bf822010-01-09 22:24:33 +110071/* Disable writes */
Damien Miller6eaeebf2013-10-15 11:55:57 +110072static int readonly;
73
74/* Requests that are allowed/denied */
75static char *request_whitelist, *request_blacklist;
Darren Tuckerdb7bf822010-01-09 22:24:33 +110076
Darren Tuckera6612d42003-06-28 12:39:03 +100077/* portable attributes, etc. */
Damien Miller7b28dc52000-09-05 13:34:53 +110078typedef struct Stat Stat;
79
Damien Miller33804262001-02-04 23:20:18 +110080struct Stat {
Damien Miller7b28dc52000-09-05 13:34:53 +110081 char *name;
82 char *long_name;
83 Attrib attrib;
84};
85
Damien Miller6eaeebf2013-10-15 11:55:57 +110086/* Packet handlers */
87static void process_open(u_int32_t id);
88static void process_close(u_int32_t id);
89static void process_read(u_int32_t id);
90static void process_write(u_int32_t id);
91static void process_stat(u_int32_t id);
92static void process_lstat(u_int32_t id);
93static void process_fstat(u_int32_t id);
94static void process_setstat(u_int32_t id);
95static void process_fsetstat(u_int32_t id);
96static void process_opendir(u_int32_t id);
97static void process_readdir(u_int32_t id);
98static void process_remove(u_int32_t id);
99static void process_mkdir(u_int32_t id);
100static void process_rmdir(u_int32_t id);
101static void process_realpath(u_int32_t id);
102static void process_rename(u_int32_t id);
103static void process_readlink(u_int32_t id);
104static void process_symlink(u_int32_t id);
105static void process_extended_posix_rename(u_int32_t id);
106static void process_extended_statvfs(u_int32_t id);
107static void process_extended_fstatvfs(u_int32_t id);
108static void process_extended_hardlink(u_int32_t id);
Damien Millerf29238e2013-10-17 11:48:52 +1100109static void process_extended_fsync(u_int32_t id);
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +0000110static void process_extended_lsetstat(u_int32_t id);
Damien Miller6eaeebf2013-10-15 11:55:57 +1100111static void process_extended(u_int32_t id);
112
113struct sftp_handler {
114 const char *name; /* user-visible name for fine-grained perms */
115 const char *ext_name; /* extended request name */
116 u_int type; /* packet type, for non extended packets */
117 void (*handler)(u_int32_t);
118 int does_write; /* if nonzero, banned for readonly mode */
119};
120
djm@openbsd.org5bed70a2019-01-01 23:10:53 +0000121static const struct sftp_handler handlers[] = {
Damien Miller6eaeebf2013-10-15 11:55:57 +1100122 /* NB. SSH2_FXP_OPEN does the readonly check in the handler itself */
123 { "open", NULL, SSH2_FXP_OPEN, process_open, 0 },
124 { "close", NULL, SSH2_FXP_CLOSE, process_close, 0 },
125 { "read", NULL, SSH2_FXP_READ, process_read, 0 },
126 { "write", NULL, SSH2_FXP_WRITE, process_write, 1 },
127 { "lstat", NULL, SSH2_FXP_LSTAT, process_lstat, 0 },
128 { "fstat", NULL, SSH2_FXP_FSTAT, process_fstat, 0 },
129 { "setstat", NULL, SSH2_FXP_SETSTAT, process_setstat, 1 },
130 { "fsetstat", NULL, SSH2_FXP_FSETSTAT, process_fsetstat, 1 },
131 { "opendir", NULL, SSH2_FXP_OPENDIR, process_opendir, 0 },
132 { "readdir", NULL, SSH2_FXP_READDIR, process_readdir, 0 },
133 { "remove", NULL, SSH2_FXP_REMOVE, process_remove, 1 },
134 { "mkdir", NULL, SSH2_FXP_MKDIR, process_mkdir, 1 },
135 { "rmdir", NULL, SSH2_FXP_RMDIR, process_rmdir, 1 },
136 { "realpath", NULL, SSH2_FXP_REALPATH, process_realpath, 0 },
137 { "stat", NULL, SSH2_FXP_STAT, process_stat, 0 },
138 { "rename", NULL, SSH2_FXP_RENAME, process_rename, 1 },
139 { "readlink", NULL, SSH2_FXP_READLINK, process_readlink, 0 },
140 { "symlink", NULL, SSH2_FXP_SYMLINK, process_symlink, 1 },
141 { NULL, NULL, 0, NULL, 0 }
142};
143
144/* SSH2_FXP_EXTENDED submessages */
djm@openbsd.org5bed70a2019-01-01 23:10:53 +0000145static const struct sftp_handler extended_handlers[] = {
Damien Miller6eaeebf2013-10-15 11:55:57 +1100146 { "posix-rename", "posix-rename@openssh.com", 0,
147 process_extended_posix_rename, 1 },
148 { "statvfs", "statvfs@openssh.com", 0, process_extended_statvfs, 0 },
149 { "fstatvfs", "fstatvfs@openssh.com", 0, process_extended_fstatvfs, 0 },
150 { "hardlink", "hardlink@openssh.com", 0, process_extended_hardlink, 1 },
Damien Millerf29238e2013-10-17 11:48:52 +1100151 { "fsync", "fsync@openssh.com", 0, process_extended_fsync, 1 },
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +0000152 { "lsetstat", "lsetstat@openssh.com", 0, process_extended_lsetstat, 1 },
Damien Miller6eaeebf2013-10-15 11:55:57 +1100153 { NULL, NULL, 0, NULL, 0 }
154};
155
156static int
djm@openbsd.org5bed70a2019-01-01 23:10:53 +0000157request_permitted(const struct sftp_handler *h)
Damien Miller6eaeebf2013-10-15 11:55:57 +1100158{
159 char *result;
160
161 if (readonly && h->does_write) {
162 verbose("Refusing %s request in read-only mode", h->name);
163 return 0;
164 }
165 if (request_blacklist != NULL &&
166 ((result = match_list(h->name, request_blacklist, NULL))) != NULL) {
167 free(result);
168 verbose("Refusing blacklisted %s request", h->name);
169 return 0;
170 }
171 if (request_whitelist != NULL &&
172 ((result = match_list(h->name, request_whitelist, NULL))) != NULL) {
173 free(result);
174 debug2("Permitting whitelisted %s request", h->name);
175 return 1;
176 }
177 if (request_whitelist != NULL) {
178 verbose("Refusing non-whitelisted %s request", h->name);
179 return 0;
180 }
181 return 1;
182}
183
Ben Lindstrombba81212001-06-25 05:01:22 +0000184static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100185errno_to_portable(int unixerrno)
186{
187 int ret = 0;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000188
Damien Miller7b28dc52000-09-05 13:34:53 +1100189 switch (unixerrno) {
190 case 0:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000191 ret = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100192 break;
193 case ENOENT:
194 case ENOTDIR:
195 case EBADF:
196 case ELOOP:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000197 ret = SSH2_FX_NO_SUCH_FILE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100198 break;
199 case EPERM:
200 case EACCES:
201 case EFAULT:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000202 ret = SSH2_FX_PERMISSION_DENIED;
Damien Miller7b28dc52000-09-05 13:34:53 +1100203 break;
204 case ENAMETOOLONG:
205 case EINVAL:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000206 ret = SSH2_FX_BAD_MESSAGE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100207 break;
Darren Tucker422c34c2008-06-09 22:48:31 +1000208 case ENOSYS:
209 ret = SSH2_FX_OP_UNSUPPORTED;
210 break;
Damien Miller7b28dc52000-09-05 13:34:53 +1100211 default:
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000212 ret = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100213 break;
214 }
215 return ret;
216}
217
Ben Lindstrombba81212001-06-25 05:01:22 +0000218static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100219flags_from_portable(int pflags)
220{
221 int flags = 0;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000222
Ben Lindstrom36592512001-03-05 05:02:08 +0000223 if ((pflags & SSH2_FXF_READ) &&
224 (pflags & SSH2_FXF_WRITE)) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100225 flags = O_RDWR;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000226 } else if (pflags & SSH2_FXF_READ) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100227 flags = O_RDONLY;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000228 } else if (pflags & SSH2_FXF_WRITE) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100229 flags = O_WRONLY;
230 }
Damien Millere9fc72e2013-10-15 12:14:12 +1100231 if (pflags & SSH2_FXF_APPEND)
232 flags |= O_APPEND;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000233 if (pflags & SSH2_FXF_CREAT)
Damien Miller7b28dc52000-09-05 13:34:53 +1100234 flags |= O_CREAT;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000235 if (pflags & SSH2_FXF_TRUNC)
Damien Miller7b28dc52000-09-05 13:34:53 +1100236 flags |= O_TRUNC;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000237 if (pflags & SSH2_FXF_EXCL)
Damien Miller7b28dc52000-09-05 13:34:53 +1100238 flags |= O_EXCL;
239 return flags;
240}
241
Damien Millerfef95ad2006-07-10 20:46:55 +1000242static const char *
243string_from_portable(int pflags)
244{
245 static char ret[128];
246
247 *ret = '\0';
248
249#define PAPPEND(str) { \
250 if (*ret != '\0') \
251 strlcat(ret, ",", sizeof(ret)); \
Damien Millerd7834352006-08-05 12:39:39 +1000252 strlcat(ret, str, sizeof(ret)); \
Damien Millerfef95ad2006-07-10 20:46:55 +1000253 }
254
255 if (pflags & SSH2_FXF_READ)
256 PAPPEND("READ")
257 if (pflags & SSH2_FXF_WRITE)
258 PAPPEND("WRITE")
Damien Millere9fc72e2013-10-15 12:14:12 +1100259 if (pflags & SSH2_FXF_APPEND)
260 PAPPEND("APPEND")
Damien Millerfef95ad2006-07-10 20:46:55 +1000261 if (pflags & SSH2_FXF_CREAT)
262 PAPPEND("CREATE")
263 if (pflags & SSH2_FXF_TRUNC)
264 PAPPEND("TRUNCATE")
265 if (pflags & SSH2_FXF_EXCL)
266 PAPPEND("EXCL")
267
268 return ret;
269}
270
Damien Miller7b28dc52000-09-05 13:34:53 +1100271/* handle handles */
272
273typedef struct Handle Handle;
274struct Handle {
275 int use;
276 DIR *dirp;
277 int fd;
Damien Millere9fc72e2013-10-15 12:14:12 +1100278 int flags;
Damien Miller7b28dc52000-09-05 13:34:53 +1100279 char *name;
Damien Millerfef95ad2006-07-10 20:46:55 +1000280 u_int64_t bytes_read, bytes_write;
Damien Miller3397d0e2008-02-10 22:26:51 +1100281 int next_unused;
Damien Miller7b28dc52000-09-05 13:34:53 +1100282};
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000283
Damien Miller7b28dc52000-09-05 13:34:53 +1100284enum {
285 HANDLE_UNUSED,
286 HANDLE_DIR,
287 HANDLE_FILE
288};
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000289
djm@openbsd.org5bed70a2019-01-01 23:10:53 +0000290static Handle *handles = NULL;
291static u_int num_handles = 0;
292static int first_unused_handle = -1;
Damien Miller7b28dc52000-09-05 13:34:53 +1100293
Damien Miller3397d0e2008-02-10 22:26:51 +1100294static void handle_unused(int i)
Damien Miller7b28dc52000-09-05 13:34:53 +1100295{
Damien Miller3397d0e2008-02-10 22:26:51 +1100296 handles[i].use = HANDLE_UNUSED;
297 handles[i].next_unused = first_unused_handle;
298 first_unused_handle = i;
Damien Miller7b28dc52000-09-05 13:34:53 +1100299}
300
Ben Lindstrombba81212001-06-25 05:01:22 +0000301static int
Damien Millere9fc72e2013-10-15 12:14:12 +1100302handle_new(int use, const char *name, int fd, int flags, DIR *dirp)
Damien Miller7b28dc52000-09-05 13:34:53 +1100303{
Damien Miller3397d0e2008-02-10 22:26:51 +1100304 int i;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000305
Damien Miller3397d0e2008-02-10 22:26:51 +1100306 if (first_unused_handle == -1) {
307 if (num_handles + 1 <= num_handles)
308 return -1;
309 num_handles++;
deraadt@openbsd.org657a5fb2015-04-24 01:36:00 +0000310 handles = xreallocarray(handles, num_handles, sizeof(Handle));
Damien Miller3397d0e2008-02-10 22:26:51 +1100311 handle_unused(num_handles - 1);
Damien Miller7b28dc52000-09-05 13:34:53 +1100312 }
Damien Miller3397d0e2008-02-10 22:26:51 +1100313
314 i = first_unused_handle;
315 first_unused_handle = handles[i].next_unused;
316
317 handles[i].use = use;
318 handles[i].dirp = dirp;
319 handles[i].fd = fd;
Damien Millere9fc72e2013-10-15 12:14:12 +1100320 handles[i].flags = flags;
Damien Miller3397d0e2008-02-10 22:26:51 +1100321 handles[i].name = xstrdup(name);
322 handles[i].bytes_read = handles[i].bytes_write = 0;
323
324 return i;
Damien Miller7b28dc52000-09-05 13:34:53 +1100325}
326
Ben Lindstrombba81212001-06-25 05:01:22 +0000327static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100328handle_is_ok(int i, int type)
329{
Damien Miller3397d0e2008-02-10 22:26:51 +1100330 return i >= 0 && (u_int)i < num_handles && handles[i].use == type;
Damien Miller7b28dc52000-09-05 13:34:53 +1100331}
332
Ben Lindstrombba81212001-06-25 05:01:22 +0000333static int
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000334handle_to_string(int handle, u_char **stringp, int *hlenp)
Damien Miller7b28dc52000-09-05 13:34:53 +1100335{
Damien Miller7b28dc52000-09-05 13:34:53 +1100336 if (stringp == NULL || hlenp == NULL)
337 return -1;
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000338 *stringp = xmalloc(sizeof(int32_t));
Damien Miller3f941882006-03-31 23:13:02 +1100339 put_u32(*stringp, handle);
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000340 *hlenp = sizeof(int32_t);
Damien Miller7b28dc52000-09-05 13:34:53 +1100341 return 0;
342}
343
Ben Lindstrombba81212001-06-25 05:01:22 +0000344static int
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000345handle_from_string(const u_char *handle, u_int hlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100346{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000347 int val;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000348
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000349 if (hlen != sizeof(int32_t))
Damien Miller7b28dc52000-09-05 13:34:53 +1100350 return -1;
Damien Miller3f941882006-03-31 23:13:02 +1100351 val = get_u32(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100352 if (handle_is_ok(val, HANDLE_FILE) ||
353 handle_is_ok(val, HANDLE_DIR))
354 return val;
355 return -1;
356}
357
Ben Lindstrombba81212001-06-25 05:01:22 +0000358static char *
Damien Miller7b28dc52000-09-05 13:34:53 +1100359handle_to_name(int handle)
360{
361 if (handle_is_ok(handle, HANDLE_DIR)||
362 handle_is_ok(handle, HANDLE_FILE))
363 return handles[handle].name;
364 return NULL;
365}
366
Ben Lindstrombba81212001-06-25 05:01:22 +0000367static DIR *
Damien Miller7b28dc52000-09-05 13:34:53 +1100368handle_to_dir(int handle)
369{
370 if (handle_is_ok(handle, HANDLE_DIR))
371 return handles[handle].dirp;
372 return NULL;
373}
374
Ben Lindstrombba81212001-06-25 05:01:22 +0000375static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100376handle_to_fd(int handle)
377{
Kevin Stevesef4eea92001-02-05 12:42:17 +0000378 if (handle_is_ok(handle, HANDLE_FILE))
Damien Miller7b28dc52000-09-05 13:34:53 +1100379 return handles[handle].fd;
380 return -1;
381}
382
Damien Millere9fc72e2013-10-15 12:14:12 +1100383static int
384handle_to_flags(int handle)
385{
386 if (handle_is_ok(handle, HANDLE_FILE))
387 return handles[handle].flags;
388 return 0;
389}
390
Damien Millerfef95ad2006-07-10 20:46:55 +1000391static void
392handle_update_read(int handle, ssize_t bytes)
393{
394 if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
395 handles[handle].bytes_read += bytes;
396}
397
398static void
399handle_update_write(int handle, ssize_t bytes)
400{
401 if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0)
402 handles[handle].bytes_write += bytes;
403}
404
405static u_int64_t
406handle_bytes_read(int handle)
407{
408 if (handle_is_ok(handle, HANDLE_FILE))
409 return (handles[handle].bytes_read);
410 return 0;
411}
412
413static u_int64_t
414handle_bytes_write(int handle)
415{
416 if (handle_is_ok(handle, HANDLE_FILE))
417 return (handles[handle].bytes_write);
418 return 0;
419}
420
Ben Lindstrombba81212001-06-25 05:01:22 +0000421static int
Damien Miller7b28dc52000-09-05 13:34:53 +1100422handle_close(int handle)
423{
424 int ret = -1;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000425
Damien Miller7b28dc52000-09-05 13:34:53 +1100426 if (handle_is_ok(handle, HANDLE_FILE)) {
427 ret = close(handles[handle].fd);
Darren Tuckera627d422013-06-02 07:31:17 +1000428 free(handles[handle].name);
Damien Miller3397d0e2008-02-10 22:26:51 +1100429 handle_unused(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100430 } else if (handle_is_ok(handle, HANDLE_DIR)) {
431 ret = closedir(handles[handle].dirp);
Darren Tuckera627d422013-06-02 07:31:17 +1000432 free(handles[handle].name);
Damien Miller3397d0e2008-02-10 22:26:51 +1100433 handle_unused(handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100434 } else {
435 errno = ENOENT;
436 }
437 return ret;
438}
439
Damien Millerfef95ad2006-07-10 20:46:55 +1000440static void
441handle_log_close(int handle, char *emsg)
442{
443 if (handle_is_ok(handle, HANDLE_FILE)) {
444 logit("%s%sclose \"%s\" bytes read %llu written %llu",
445 emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
446 handle_to_name(handle),
Darren Tucker86473c52007-05-20 14:59:32 +1000447 (unsigned long long)handle_bytes_read(handle),
448 (unsigned long long)handle_bytes_write(handle));
Damien Millerfef95ad2006-07-10 20:46:55 +1000449 } else {
450 logit("%s%sclosedir \"%s\"",
451 emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ",
452 handle_to_name(handle));
453 }
454}
455
456static void
457handle_log_exit(void)
458{
459 u_int i;
460
Damien Miller3397d0e2008-02-10 22:26:51 +1100461 for (i = 0; i < num_handles; i++)
Damien Millerfef95ad2006-07-10 20:46:55 +1000462 if (handles[i].use != HANDLE_UNUSED)
463 handle_log_close(i, "forced");
464}
465
Ben Lindstrombba81212001-06-25 05:01:22 +0000466static int
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000467get_handle(struct sshbuf *queue, int *hp)
Damien Miller7b28dc52000-09-05 13:34:53 +1100468{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000469 u_char *handle;
470 int r;
471 size_t hlen;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000472
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000473 *hp = -1;
474 if ((r = sshbuf_get_string(queue, &handle, &hlen)) != 0)
475 return r;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000476 if (hlen < 256)
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000477 *hp = handle_from_string(handle, hlen);
Darren Tuckera627d422013-06-02 07:31:17 +1000478 free(handle);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000479 return 0;
Damien Miller7b28dc52000-09-05 13:34:53 +1100480}
481
482/* send replies */
483
Ben Lindstrombba81212001-06-25 05:01:22 +0000484static void
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000485send_msg(struct sshbuf *m)
Damien Miller7b28dc52000-09-05 13:34:53 +1100486{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000487 int r;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000488
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000489 if ((r = sshbuf_put_stringb(oqueue, m)) != 0)
490 fatal("%s: buffer error: %s", __func__, ssh_err(r));
491 sshbuf_reset(m);
Damien Miller7b28dc52000-09-05 13:34:53 +1100492}
493
Damien Millerfef95ad2006-07-10 20:46:55 +1000494static const char *
495status_to_message(u_int32_t status)
Damien Miller7b28dc52000-09-05 13:34:53 +1100496{
Damien Miller058316f2001-03-08 10:08:49 +1100497 const char *status_messages[] = {
498 "Success", /* SSH_FX_OK */
499 "End of file", /* SSH_FX_EOF */
500 "No such file", /* SSH_FX_NO_SUCH_FILE */
501 "Permission denied", /* SSH_FX_PERMISSION_DENIED */
502 "Failure", /* SSH_FX_FAILURE */
503 "Bad message", /* SSH_FX_BAD_MESSAGE */
504 "No connection", /* SSH_FX_NO_CONNECTION */
505 "Connection lost", /* SSH_FX_CONNECTION_LOST */
506 "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */
507 "Unknown error" /* Others */
508 };
deraadt@openbsd.org9136ec12016-09-12 01:22:38 +0000509 return (status_messages[MINIMUM(status,SSH2_FX_MAX)]);
Damien Millerfef95ad2006-07-10 20:46:55 +1000510}
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000511
Damien Millerfef95ad2006-07-10 20:46:55 +1000512static void
513send_status(u_int32_t id, u_int32_t status)
514{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000515 struct sshbuf *msg;
516 int r;
Damien Millerfef95ad2006-07-10 20:46:55 +1000517
518 debug3("request %u: sent status %u", id, status);
519 if (log_level > SYSLOG_LEVEL_VERBOSE ||
520 (status != SSH2_FX_OK && status != SSH2_FX_EOF))
521 logit("sent status %s", status_to_message(status));
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000522 if ((msg = sshbuf_new()) == NULL)
523 fatal("%s: sshbuf_new failed", __func__);
524 if ((r = sshbuf_put_u8(msg, SSH2_FXP_STATUS)) != 0 ||
525 (r = sshbuf_put_u32(msg, id)) != 0 ||
526 (r = sshbuf_put_u32(msg, status)) != 0)
527 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller058316f2001-03-08 10:08:49 +1100528 if (version >= 3) {
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000529 if ((r = sshbuf_put_cstring(msg,
530 status_to_message(status))) != 0 ||
531 (r = sshbuf_put_cstring(msg, "")) != 0)
532 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller058316f2001-03-08 10:08:49 +1100533 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000534 send_msg(msg);
535 sshbuf_free(msg);
Damien Miller7b28dc52000-09-05 13:34:53 +1100536}
Ben Lindstrombba81212001-06-25 05:01:22 +0000537static void
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000538send_data_or_handle(char type, u_int32_t id, const u_char *data, int dlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100539{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000540 struct sshbuf *msg;
541 int r;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000542
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000543 if ((msg = sshbuf_new()) == NULL)
544 fatal("%s: sshbuf_new failed", __func__);
545 if ((r = sshbuf_put_u8(msg, type)) != 0 ||
546 (r = sshbuf_put_u32(msg, id)) != 0 ||
547 (r = sshbuf_put_string(msg, data, dlen)) != 0)
548 fatal("%s: buffer error: %s", __func__, ssh_err(r));
549 send_msg(msg);
550 sshbuf_free(msg);
Damien Miller7b28dc52000-09-05 13:34:53 +1100551}
552
Ben Lindstrombba81212001-06-25 05:01:22 +0000553static void
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000554send_data(u_int32_t id, const u_char *data, int dlen)
Damien Miller7b28dc52000-09-05 13:34:53 +1100555{
Damien Millerfef95ad2006-07-10 20:46:55 +1000556 debug("request %u: sent data len %d", id, dlen);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000557 send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
Damien Miller7b28dc52000-09-05 13:34:53 +1100558}
559
Ben Lindstrombba81212001-06-25 05:01:22 +0000560static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100561send_handle(u_int32_t id, int handle)
562{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000563 u_char *string;
Damien Miller7b28dc52000-09-05 13:34:53 +1100564 int hlen;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000565
Damien Miller7b28dc52000-09-05 13:34:53 +1100566 handle_to_string(handle, &string, &hlen);
Damien Millerfef95ad2006-07-10 20:46:55 +1000567 debug("request %u: sent handle handle %d", id, handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000568 send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen);
Darren Tuckera627d422013-06-02 07:31:17 +1000569 free(string);
Damien Miller7b28dc52000-09-05 13:34:53 +1100570}
571
Ben Lindstrombba81212001-06-25 05:01:22 +0000572static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100573send_names(u_int32_t id, int count, const Stat *stats)
Damien Miller7b28dc52000-09-05 13:34:53 +1100574{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000575 struct sshbuf *msg;
576 int i, r;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000577
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000578 if ((msg = sshbuf_new()) == NULL)
579 fatal("%s: sshbuf_new failed", __func__);
580 if ((r = sshbuf_put_u8(msg, SSH2_FXP_NAME)) != 0 ||
581 (r = sshbuf_put_u32(msg, id)) != 0 ||
582 (r = sshbuf_put_u32(msg, count)) != 0)
583 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Millerfef95ad2006-07-10 20:46:55 +1000584 debug("request %u: sent names count %d", id, count);
Damien Miller7b28dc52000-09-05 13:34:53 +1100585 for (i = 0; i < count; i++) {
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000586 if ((r = sshbuf_put_cstring(msg, stats[i].name)) != 0 ||
587 (r = sshbuf_put_cstring(msg, stats[i].long_name)) != 0 ||
588 (r = encode_attrib(msg, &stats[i].attrib)) != 0)
589 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +1100590 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000591 send_msg(msg);
592 sshbuf_free(msg);
Damien Miller7b28dc52000-09-05 13:34:53 +1100593}
594
Ben Lindstrombba81212001-06-25 05:01:22 +0000595static void
Damien Millerf58b58c2003-11-17 21:18:23 +1100596send_attrib(u_int32_t id, const Attrib *a)
Damien Miller7b28dc52000-09-05 13:34:53 +1100597{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000598 struct sshbuf *msg;
599 int r;
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000600
Damien Millerfef95ad2006-07-10 20:46:55 +1000601 debug("request %u: sent attrib have 0x%x", id, a->flags);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000602 if ((msg = sshbuf_new()) == NULL)
603 fatal("%s: sshbuf_new failed", __func__);
604 if ((r = sshbuf_put_u8(msg, SSH2_FXP_ATTRS)) != 0 ||
605 (r = sshbuf_put_u32(msg, id)) != 0 ||
606 (r = encode_attrib(msg, a)) != 0)
607 fatal("%s: buffer error: %s", __func__, ssh_err(r));
608 send_msg(msg);
609 sshbuf_free(msg);
Damien Miller7b28dc52000-09-05 13:34:53 +1100610}
611
Damien Millerd671e5a2008-05-19 14:53:33 +1000612static void
613send_statvfs(u_int32_t id, struct statvfs *st)
614{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000615 struct sshbuf *msg;
Damien Millerd671e5a2008-05-19 14:53:33 +1000616 u_int64_t flag;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000617 int r;
Damien Millerd671e5a2008-05-19 14:53:33 +1000618
619 flag = (st->f_flag & ST_RDONLY) ? SSH2_FXE_STATVFS_ST_RDONLY : 0;
620 flag |= (st->f_flag & ST_NOSUID) ? SSH2_FXE_STATVFS_ST_NOSUID : 0;
621
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000622 if ((msg = sshbuf_new()) == NULL)
623 fatal("%s: sshbuf_new failed", __func__);
624 if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED_REPLY)) != 0 ||
625 (r = sshbuf_put_u32(msg, id)) != 0 ||
626 (r = sshbuf_put_u64(msg, st->f_bsize)) != 0 ||
627 (r = sshbuf_put_u64(msg, st->f_frsize)) != 0 ||
628 (r = sshbuf_put_u64(msg, st->f_blocks)) != 0 ||
629 (r = sshbuf_put_u64(msg, st->f_bfree)) != 0 ||
630 (r = sshbuf_put_u64(msg, st->f_bavail)) != 0 ||
631 (r = sshbuf_put_u64(msg, st->f_files)) != 0 ||
632 (r = sshbuf_put_u64(msg, st->f_ffree)) != 0 ||
633 (r = sshbuf_put_u64(msg, st->f_favail)) != 0 ||
634 (r = sshbuf_put_u64(msg, FSID_TO_ULONG(st->f_fsid))) != 0 ||
635 (r = sshbuf_put_u64(msg, flag)) != 0 ||
636 (r = sshbuf_put_u64(msg, st->f_namemax)) != 0)
637 fatal("%s: buffer error: %s", __func__, ssh_err(r));
638 send_msg(msg);
639 sshbuf_free(msg);
Damien Millerd671e5a2008-05-19 14:53:33 +1000640}
641
Damien Miller7b28dc52000-09-05 13:34:53 +1100642/* parse incoming */
643
Ben Lindstrombba81212001-06-25 05:01:22 +0000644static void
Damien Miller7b28dc52000-09-05 13:34:53 +1100645process_init(void)
646{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000647 struct sshbuf *msg;
648 int r;
Damien Miller7b28dc52000-09-05 13:34:53 +1100649
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000650 if ((r = sshbuf_get_u32(iqueue, &version)) != 0)
651 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Millerf145a5b2011-06-20 14:42:51 +1000652 verbose("received client version %u", version);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000653 if ((msg = sshbuf_new()) == NULL)
654 fatal("%s: sshbuf_new failed", __func__);
655 if ((r = sshbuf_put_u8(msg, SSH2_FXP_VERSION)) != 0 ||
656 (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0 ||
657 /* POSIX rename extension */
658 (r = sshbuf_put_cstring(msg, "posix-rename@openssh.com")) != 0 ||
659 (r = sshbuf_put_cstring(msg, "1")) != 0 || /* version */
660 /* statvfs extension */
661 (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 ||
662 (r = sshbuf_put_cstring(msg, "2")) != 0 || /* version */
663 /* fstatvfs extension */
664 (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 ||
665 (r = sshbuf_put_cstring(msg, "2")) != 0 || /* version */
666 /* hardlink extension */
667 (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 ||
668 (r = sshbuf_put_cstring(msg, "1")) != 0 || /* version */
669 /* fsync extension */
670 (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 ||
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +0000671 (r = sshbuf_put_cstring(msg, "1")) != 0 || /* version */
672 (r = sshbuf_put_cstring(msg, "lsetstat@openssh.com")) != 0 ||
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000673 (r = sshbuf_put_cstring(msg, "1")) != 0) /* version */
674 fatal("%s: buffer error: %s", __func__, ssh_err(r));
675 send_msg(msg);
676 sshbuf_free(msg);
Damien Miller7b28dc52000-09-05 13:34:53 +1100677}
678
Ben Lindstrombba81212001-06-25 05:01:22 +0000679static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100680process_open(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100681{
Damien Miller6eaeebf2013-10-15 11:55:57 +1100682 u_int32_t pflags;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000683 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100684 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000685 int r, handle, fd, flags, mode, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100686
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000687 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ||
688 (r = sshbuf_get_u32(iqueue, &pflags)) != 0 || /* portable flags */
689 (r = decode_attrib(iqueue, &a)) != 0)
690 fatal("%s: buffer error: %s", __func__, ssh_err(r));
691
Damien Miller6444fe92006-07-10 21:31:27 +1000692 debug3("request %u: open flags %d", id, pflags);
Damien Miller7b28dc52000-09-05 13:34:53 +1100693 flags = flags_from_portable(pflags);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000694 mode = (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a.perm : 0666;
Damien Millerfef95ad2006-07-10 20:46:55 +1000695 logit("open \"%s\" flags %s mode 0%o",
696 name, string_from_portable(pflags), mode);
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100697 if (readonly &&
djm@openbsd.org4d827f02017-04-04 00:24:56 +0000698 ((flags & O_ACCMODE) != O_RDONLY ||
699 (flags & (O_CREAT|O_TRUNC)) != 0)) {
Damien Miller6eaeebf2013-10-15 11:55:57 +1100700 verbose("Refusing open request in read-only mode");
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000701 status = SSH2_FX_PERMISSION_DENIED;
Damien Miller6eaeebf2013-10-15 11:55:57 +1100702 } else {
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100703 fd = open(name, flags, mode);
704 if (fd < 0) {
705 status = errno_to_portable(errno);
Damien Miller7b28dc52000-09-05 13:34:53 +1100706 } else {
Damien Millere9fc72e2013-10-15 12:14:12 +1100707 handle = handle_new(HANDLE_FILE, name, fd, flags, NULL);
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100708 if (handle < 0) {
709 close(fd);
710 } else {
711 send_handle(id, handle);
712 status = SSH2_FX_OK;
713 }
Damien Miller7b28dc52000-09-05 13:34:53 +1100714 }
715 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000716 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100717 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +1000718 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100719}
720
Ben Lindstrombba81212001-06-25 05:01:22 +0000721static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100722process_close(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100723{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000724 int r, handle, ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100725
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000726 if ((r = get_handle(iqueue, &handle)) != 0)
727 fatal("%s: buffer error: %s", __func__, ssh_err(r));
728
Damien Millerfef95ad2006-07-10 20:46:55 +1000729 debug3("request %u: close handle %u", id, handle);
730 handle_log_close(handle, NULL);
Damien Miller7b28dc52000-09-05 13:34:53 +1100731 ret = handle_close(handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000732 status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100733 send_status(id, status);
734}
735
Ben Lindstrombba81212001-06-25 05:01:22 +0000736static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100737process_read(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100738{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000739 u_char buf[64*1024];
Damien Miller6eaeebf2013-10-15 11:55:57 +1100740 u_int32_t len;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000741 int r, handle, fd, ret, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100742 u_int64_t off;
743
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000744 if ((r = get_handle(iqueue, &handle)) != 0 ||
745 (r = sshbuf_get_u64(iqueue, &off)) != 0 ||
746 (r = sshbuf_get_u32(iqueue, &len)) != 0)
747 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +1100748
Damien Millerfef95ad2006-07-10 20:46:55 +1000749 debug("request %u: read \"%s\" (handle %d) off %llu len %d",
750 id, handle_to_name(handle), handle, (unsigned long long)off, len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100751 if (len > sizeof buf) {
752 len = sizeof buf;
Damien Millerfef95ad2006-07-10 20:46:55 +1000753 debug2("read change len %d", len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100754 }
755 fd = handle_to_fd(handle);
756 if (fd >= 0) {
757 if (lseek(fd, off, SEEK_SET) < 0) {
758 error("process_read: seek failed");
759 status = errno_to_portable(errno);
760 } else {
761 ret = read(fd, buf, len);
762 if (ret < 0) {
763 status = errno_to_portable(errno);
764 } else if (ret == 0) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000765 status = SSH2_FX_EOF;
Damien Miller7b28dc52000-09-05 13:34:53 +1100766 } else {
767 send_data(id, buf, ret);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000768 status = SSH2_FX_OK;
Damien Millerfef95ad2006-07-10 20:46:55 +1000769 handle_update_read(handle, ret);
Damien Miller7b28dc52000-09-05 13:34:53 +1100770 }
771 }
772 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000773 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100774 send_status(id, status);
775}
776
Ben Lindstrombba81212001-06-25 05:01:22 +0000777static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100778process_write(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100779{
Damien Miller7b28dc52000-09-05 13:34:53 +1100780 u_int64_t off;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000781 size_t len;
782 int r, handle, fd, ret, status;
783 u_char *data;
Damien Miller7b28dc52000-09-05 13:34:53 +1100784
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000785 if ((r = get_handle(iqueue, &handle)) != 0 ||
786 (r = sshbuf_get_u64(iqueue, &off)) != 0 ||
787 (r = sshbuf_get_string(iqueue, &data, &len)) != 0)
788 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +1100789
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000790 debug("request %u: write \"%s\" (handle %d) off %llu len %zu",
Damien Millerfef95ad2006-07-10 20:46:55 +1000791 id, handle_to_name(handle), handle, (unsigned long long)off, len);
Damien Miller7b28dc52000-09-05 13:34:53 +1100792 fd = handle_to_fd(handle);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000793
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100794 if (fd < 0)
795 status = SSH2_FX_FAILURE;
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100796 else {
Damien Millere9fc72e2013-10-15 12:14:12 +1100797 if (!(handle_to_flags(handle) & O_APPEND) &&
798 lseek(fd, off, SEEK_SET) < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100799 status = errno_to_portable(errno);
800 error("process_write: seek failed");
801 } else {
802/* XXX ATOMICIO ? */
803 ret = write(fd, data, len);
Damien Millereccb9de2005-06-17 12:59:34 +1000804 if (ret < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100805 error("process_write: write failed");
806 status = errno_to_portable(errno);
Damien Millereccb9de2005-06-17 12:59:34 +1000807 } else if ((size_t)ret == len) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000808 status = SSH2_FX_OK;
Damien Millerfef95ad2006-07-10 20:46:55 +1000809 handle_update_write(handle, ret);
Damien Miller7b28dc52000-09-05 13:34:53 +1100810 } else {
Damien Millerfef95ad2006-07-10 20:46:55 +1000811 debug2("nothing at all written");
Darren Tuckerdb7bf822010-01-09 22:24:33 +1100812 status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100813 }
814 }
815 }
816 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +1000817 free(data);
Damien Miller7b28dc52000-09-05 13:34:53 +1100818}
819
Ben Lindstrombba81212001-06-25 05:01:22 +0000820static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100821process_do_stat(u_int32_t id, int do_lstat)
Damien Miller7b28dc52000-09-05 13:34:53 +1100822{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000823 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100824 struct stat st;
Damien Miller7b28dc52000-09-05 13:34:53 +1100825 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000826 int r, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100827
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000828 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0)
829 fatal("%s: buffer error: %s", __func__, ssh_err(r));
830
Damien Millerfef95ad2006-07-10 20:46:55 +1000831 debug3("request %u: %sstat", id, do_lstat ? "l" : "");
832 verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000833 r = do_lstat ? lstat(name, &st) : stat(name, &st);
834 if (r < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100835 status = errno_to_portable(errno);
836 } else {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000837 stat_to_attrib(&st, &a);
838 send_attrib(id, &a);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000839 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100840 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000841 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100842 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +1000843 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100844}
845
Ben Lindstrombba81212001-06-25 05:01:22 +0000846static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100847process_stat(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100848{
Damien Miller6eaeebf2013-10-15 11:55:57 +1100849 process_do_stat(id, 0);
Damien Miller7b28dc52000-09-05 13:34:53 +1100850}
851
Ben Lindstrombba81212001-06-25 05:01:22 +0000852static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100853process_lstat(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100854{
Damien Miller6eaeebf2013-10-15 11:55:57 +1100855 process_do_stat(id, 1);
Damien Miller7b28dc52000-09-05 13:34:53 +1100856}
857
Ben Lindstrombba81212001-06-25 05:01:22 +0000858static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100859process_fstat(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100860{
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000861 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100862 struct stat st;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000863 int fd, r, handle, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +1100864
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000865 if ((r = get_handle(iqueue, &handle)) != 0)
866 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Millerfef95ad2006-07-10 20:46:55 +1000867 debug("request %u: fstat \"%s\" (handle %u)",
868 id, handle_to_name(handle), handle);
Damien Miller7b28dc52000-09-05 13:34:53 +1100869 fd = handle_to_fd(handle);
Damien Millere2334d62007-01-05 16:31:02 +1100870 if (fd >= 0) {
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000871 r = fstat(fd, &st);
872 if (r < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +1100873 status = errno_to_portable(errno);
874 } else {
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000875 stat_to_attrib(&st, &a);
876 send_attrib(id, &a);
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000877 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100878 }
879 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000880 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +1100881 send_status(id, status);
882}
883
Ben Lindstrombba81212001-06-25 05:01:22 +0000884static struct timeval *
Damien Millerf58b58c2003-11-17 21:18:23 +1100885attrib_to_tv(const Attrib *a)
Damien Miller7b28dc52000-09-05 13:34:53 +1100886{
887 static struct timeval tv[2];
Ben Lindstrom1addabd2001-03-05 07:09:11 +0000888
Damien Miller7b28dc52000-09-05 13:34:53 +1100889 tv[0].tv_sec = a->atime;
890 tv[0].tv_usec = 0;
891 tv[1].tv_sec = a->mtime;
892 tv[1].tv_usec = 0;
893 return tv;
894}
895
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +0000896static struct timespec *
897attrib_to_ts(const Attrib *a)
898{
899 static struct timespec ts[2];
900
901 ts[0].tv_sec = a->atime;
902 ts[0].tv_nsec = 0;
903 ts[1].tv_sec = a->mtime;
904 ts[1].tv_nsec = 0;
905 return ts;
906}
907
Ben Lindstrombba81212001-06-25 05:01:22 +0000908static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100909process_setstat(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100910{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000911 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +1100912 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000913 int r, status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +1100914
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000915 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ||
916 (r = decode_attrib(iqueue, &a)) != 0)
917 fatal("%s: buffer error: %s", __func__, ssh_err(r));
918
Damien Millerfef95ad2006-07-10 20:46:55 +1000919 debug("request %u: setstat name \"%s\"", id, name);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000920 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) {
Darren Tucker86473c52007-05-20 14:59:32 +1000921 logit("set \"%s\" size %llu",
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000922 name, (unsigned long long)a.size);
923 r = truncate(name, a.size);
924 if (r == -1)
Damien Miller00c92172002-02-13 14:05:00 +1100925 status = errno_to_portable(errno);
926 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000927 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
928 logit("set \"%s\" mode %04o", name, a.perm);
929 r = chmod(name, a.perm & 07777);
930 if (r == -1)
Damien Miller7b28dc52000-09-05 13:34:53 +1100931 status = errno_to_portable(errno);
932 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000933 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000934 char buf[64];
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000935 time_t t = a.mtime;
Damien Millerfef95ad2006-07-10 20:46:55 +1000936
937 strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S",
938 localtime(&t));
939 logit("set \"%s\" modtime %s", name, buf);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000940 r = utimes(name, attrib_to_tv(&a));
941 if (r == -1)
Damien Miller7b28dc52000-09-05 13:34:53 +1100942 status = errno_to_portable(errno);
943 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000944 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
Damien Millerfef95ad2006-07-10 20:46:55 +1000945 logit("set \"%s\" owner %lu group %lu", name,
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000946 (u_long)a.uid, (u_long)a.gid);
947 r = chown(name, a.uid, a.gid);
948 if (r == -1)
Kevin Steves8e743932001-02-05 13:24:35 +0000949 status = errno_to_portable(errno);
950 }
Damien Miller7b28dc52000-09-05 13:34:53 +1100951 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +1000952 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +1100953}
954
Ben Lindstrombba81212001-06-25 05:01:22 +0000955static void
Damien Miller6eaeebf2013-10-15 11:55:57 +1100956process_fsetstat(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +1100957{
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000958 Attrib a;
959 int handle, fd, r;
Ben Lindstrom2f959b42001-01-11 06:20:23 +0000960 int status = SSH2_FX_OK;
Kevin Stevesf7ffab32001-01-24 20:11:06 +0000961
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000962 if ((r = get_handle(iqueue, &handle)) != 0 ||
963 (r = decode_attrib(iqueue, &a)) != 0)
964 fatal("%s: buffer error: %s", __func__, ssh_err(r));
965
966 debug("request %u: fsetstat handle %d", id, handle);
967 fd = handle_to_fd(handle);
968 if (fd < 0)
969 status = SSH2_FX_FAILURE;
970 else {
971 char *name = handle_to_name(handle);
972
973 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) {
974 logit("set \"%s\" size %llu",
975 name, (unsigned long long)a.size);
976 r = ftruncate(fd, a.size);
977 if (r == -1)
978 status = errno_to_portable(errno);
979 }
980 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
981 logit("set \"%s\" mode %04o", name, a.perm);
982#ifdef HAVE_FCHMOD
Damien Miller83b96782015-01-15 02:35:50 +1100983 r = fchmod(fd, a.perm & 07777);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000984#else
Damien Miller83b96782015-01-15 02:35:50 +1100985 r = chmod(name, a.perm & 07777);
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000986#endif
987 if (r == -1)
988 status = errno_to_portable(errno);
989 }
990 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
991 char buf[64];
992 time_t t = a.mtime;
993
994 strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S",
995 localtime(&t));
996 logit("set \"%s\" modtime %s", name, buf);
997#ifdef HAVE_FUTIMES
Damien Miller83b96782015-01-15 02:35:50 +1100998 r = futimes(fd, attrib_to_tv(&a));
djm@openbsd.org7d845f42015-01-14 13:54:13 +0000999#else
Damien Miller83b96782015-01-15 02:35:50 +11001000 r = utimes(name, attrib_to_tv(&a));
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001001#endif
1002 if (r == -1)
1003 status = errno_to_portable(errno);
1004 }
1005 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
1006 logit("set \"%s\" owner %lu group %lu", name,
1007 (u_long)a.uid, (u_long)a.gid);
1008#ifdef HAVE_FCHOWN
Damien Miller83b96782015-01-15 02:35:50 +11001009 r = fchown(fd, a.uid, a.gid);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001010#else
Damien Miller83b96782015-01-15 02:35:50 +11001011 r = chown(name, a.uid, a.gid);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001012#endif
1013 if (r == -1)
1014 status = errno_to_portable(errno);
1015 }
1016 }
1017 send_status(id, status);
1018}
Damien Miller7b28dc52000-09-05 13:34:53 +11001019
Ben Lindstrombba81212001-06-25 05:01:22 +00001020static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001021process_opendir(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001022{
1023 DIR *dirp = NULL;
1024 char *path;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001025 int r, handle, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +11001026
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001027 if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0)
1028 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1029
Damien Millerfef95ad2006-07-10 20:46:55 +10001030 debug3("request %u: opendir", id);
1031 logit("opendir \"%s\"", path);
Kevin Stevesef4eea92001-02-05 12:42:17 +00001032 dirp = opendir(path);
Damien Miller7b28dc52000-09-05 13:34:53 +11001033 if (dirp == NULL) {
1034 status = errno_to_portable(errno);
1035 } else {
Damien Millere9fc72e2013-10-15 12:14:12 +11001036 handle = handle_new(HANDLE_DIR, path, 0, 0, dirp);
Damien Miller7b28dc52000-09-05 13:34:53 +11001037 if (handle < 0) {
1038 closedir(dirp);
1039 } else {
1040 send_handle(id, handle);
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001041 status = SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +11001042 }
Kevin Stevesef4eea92001-02-05 12:42:17 +00001043
Damien Miller7b28dc52000-09-05 13:34:53 +11001044 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001045 if (status != SSH2_FX_OK)
Damien Miller7b28dc52000-09-05 13:34:53 +11001046 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001047 free(path);
Damien Miller7b28dc52000-09-05 13:34:53 +11001048}
1049
Ben Lindstrombba81212001-06-25 05:01:22 +00001050static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001051process_readdir(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001052{
1053 DIR *dirp;
1054 struct dirent *dp;
1055 char *path;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001056 int r, handle;
Damien Miller7b28dc52000-09-05 13:34:53 +11001057
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001058 if ((r = get_handle(iqueue, &handle)) != 0)
1059 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1060
Damien Millerfef95ad2006-07-10 20:46:55 +10001061 debug("request %u: readdir \"%s\" (handle %d)", id,
1062 handle_to_name(handle), handle);
Damien Miller7b28dc52000-09-05 13:34:53 +11001063 dirp = handle_to_dir(handle);
1064 path = handle_to_name(handle);
1065 if (dirp == NULL || path == NULL) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001066 send_status(id, SSH2_FX_FAILURE);
Damien Miller7b28dc52000-09-05 13:34:53 +11001067 } else {
Damien Miller7b28dc52000-09-05 13:34:53 +11001068 struct stat st;
deraadt@openbsd.org087266e2015-01-20 23:14:00 +00001069 char pathname[PATH_MAX];
Damien Miller7b28dc52000-09-05 13:34:53 +11001070 Stat *stats;
1071 int nstats = 10, count = 0, i;
Ben Lindstromb1f483f2002-06-23 21:27:18 +00001072
Damien Miller07d86be2006-03-26 14:19:21 +11001073 stats = xcalloc(nstats, sizeof(Stat));
Damien Miller7b28dc52000-09-05 13:34:53 +11001074 while ((dp = readdir(dirp)) != NULL) {
1075 if (count >= nstats) {
1076 nstats *= 2;
deraadt@openbsd.org657a5fb2015-04-24 01:36:00 +00001077 stats = xreallocarray(stats, nstats, sizeof(Stat));
Damien Miller7b28dc52000-09-05 13:34:53 +11001078 }
1079/* XXX OVERFLOW ? */
Ben Lindstrom95148e32001-08-06 21:30:53 +00001080 snprintf(pathname, sizeof pathname, "%s%s%s", path,
1081 strcmp(path, "/") ? "/" : "", dp->d_name);
Damien Miller7b28dc52000-09-05 13:34:53 +11001082 if (lstat(pathname, &st) < 0)
1083 continue;
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001084 stat_to_attrib(&st, &(stats[count].attrib));
Damien Miller7b28dc52000-09-05 13:34:53 +11001085 stats[count].name = xstrdup(dp->d_name);
Darren Tucker2901e2d2010-01-13 22:44:06 +11001086 stats[count].long_name = ls_file(dp->d_name, &st, 0, 0);
Damien Miller7b28dc52000-09-05 13:34:53 +11001087 count++;
1088 /* send up to 100 entries in one message */
Ben Lindstrombf555ba2001-01-18 02:04:35 +00001089 /* XXX check packet size instead */
Damien Miller7b28dc52000-09-05 13:34:53 +11001090 if (count == 100)
1091 break;
1092 }
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001093 if (count > 0) {
1094 send_names(id, count, stats);
Damien Miller9f0f5c62001-12-21 14:45:46 +11001095 for (i = 0; i < count; i++) {
Darren Tuckera627d422013-06-02 07:31:17 +10001096 free(stats[i].name);
1097 free(stats[i].long_name);
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001098 }
1099 } else {
1100 send_status(id, SSH2_FX_EOF);
Damien Miller7b28dc52000-09-05 13:34:53 +11001101 }
Darren Tuckera627d422013-06-02 07:31:17 +10001102 free(stats);
Damien Miller7b28dc52000-09-05 13:34:53 +11001103 }
1104}
1105
Ben Lindstrombba81212001-06-25 05:01:22 +00001106static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001107process_remove(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001108{
1109 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001110 int r, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +11001111
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001112 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0)
1113 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1114
Damien Millerfef95ad2006-07-10 20:46:55 +10001115 debug3("request %u: remove", id);
1116 logit("remove name \"%s\"", name);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001117 r = unlink(name);
1118 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +11001119 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001120 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +11001121}
1122
Ben Lindstrombba81212001-06-25 05:01:22 +00001123static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001124process_mkdir(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001125{
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001126 Attrib a;
Damien Miller7b28dc52000-09-05 13:34:53 +11001127 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001128 int r, mode, status = SSH2_FX_FAILURE;
Damien Miller7b28dc52000-09-05 13:34:53 +11001129
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001130 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ||
1131 (r = decode_attrib(iqueue, &a)) != 0)
1132 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1133
1134 mode = (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ?
1135 a.perm & 07777 : 0777;
Damien Millerfef95ad2006-07-10 20:46:55 +10001136 debug3("request %u: mkdir", id);
1137 logit("mkdir name \"%s\" mode 0%o", name, mode);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001138 r = mkdir(name, mode);
1139 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +11001140 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001141 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +11001142}
1143
Ben Lindstrombba81212001-06-25 05:01:22 +00001144static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001145process_rmdir(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001146{
Damien Miller7b28dc52000-09-05 13:34:53 +11001147 char *name;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001148 int r, status;
Damien Miller7b28dc52000-09-05 13:34:53 +11001149
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001150 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0)
1151 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1152
Damien Millerfef95ad2006-07-10 20:46:55 +10001153 debug3("request %u: rmdir", id);
1154 logit("rmdir name \"%s\"", name);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001155 r = rmdir(name);
1156 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller7b28dc52000-09-05 13:34:53 +11001157 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001158 free(name);
Damien Miller7b28dc52000-09-05 13:34:53 +11001159}
1160
Ben Lindstrombba81212001-06-25 05:01:22 +00001161static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001162process_realpath(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001163{
deraadt@openbsd.org087266e2015-01-20 23:14:00 +00001164 char resolvedname[PATH_MAX];
Damien Miller7b28dc52000-09-05 13:34:53 +11001165 char *path;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001166 int r;
Damien Miller7b28dc52000-09-05 13:34:53 +11001167
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001168 if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0)
1169 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1170
Ben Lindstromfa1b3d02000-12-10 01:55:37 +00001171 if (path[0] == '\0') {
Darren Tuckera627d422013-06-02 07:31:17 +10001172 free(path);
Ben Lindstromfa1b3d02000-12-10 01:55:37 +00001173 path = xstrdup(".");
1174 }
Damien Millerfef95ad2006-07-10 20:46:55 +10001175 debug3("request %u: realpath", id);
1176 verbose("realpath \"%s\"", path);
Damien Miller7b28dc52000-09-05 13:34:53 +11001177 if (realpath(path, resolvedname) == NULL) {
1178 send_status(id, errno_to_portable(errno));
1179 } else {
1180 Stat s;
1181 attrib_clear(&s.attrib);
1182 s.name = s.long_name = resolvedname;
1183 send_names(id, 1, &s);
1184 }
Darren Tuckera627d422013-06-02 07:31:17 +10001185 free(path);
Damien Miller7b28dc52000-09-05 13:34:53 +11001186}
1187
Ben Lindstrombba81212001-06-25 05:01:22 +00001188static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001189process_rename(u_int32_t id)
Damien Miller7b28dc52000-09-05 13:34:53 +11001190{
Damien Miller7b28dc52000-09-05 13:34:53 +11001191 char *oldpath, *newpath;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001192 int r, status;
Damien Millerb3207e82003-03-26 16:01:11 +11001193 struct stat sb;
Damien Miller7b28dc52000-09-05 13:34:53 +11001194
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001195 if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 ||
1196 (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0)
1197 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1198
Damien Millerfef95ad2006-07-10 20:46:55 +10001199 debug3("request %u: rename", id);
1200 logit("rename old \"%s\" new \"%s\"", oldpath, newpath);
Damien Millerb3207e82003-03-26 16:01:11 +11001201 status = SSH2_FX_FAILURE;
Damien Miller6eaeebf2013-10-15 11:55:57 +11001202 if (lstat(oldpath, &sb) == -1)
Damien Miller9e51a732003-02-24 11:58:44 +11001203 status = errno_to_portable(errno);
Damien Millerb3207e82003-03-26 16:01:11 +11001204 else if (S_ISREG(sb.st_mode)) {
1205 /* Race-free rename of regular files */
Darren Tuckeraedc1d62004-06-25 17:06:02 +10001206 if (link(oldpath, newpath) == -1) {
Damien Miller0e265512009-08-28 10:43:13 +10001207 if (errno == EOPNOTSUPP || errno == ENOSYS
Darren Tuckerf7fa7062008-07-04 14:10:19 +10001208#ifdef EXDEV
1209 || errno == EXDEV
1210#endif
Darren Tuckere59b5082004-06-28 16:01:19 +10001211#ifdef LINK_OPNOTSUPP_ERRNO
1212 || errno == LINK_OPNOTSUPP_ERRNO
1213#endif
1214 ) {
Darren Tuckeraedc1d62004-06-25 17:06:02 +10001215 struct stat st;
1216
1217 /*
1218 * fs doesn't support links, so fall back to
1219 * stat+rename. This is racy.
1220 */
1221 if (stat(newpath, &st) == -1) {
1222 if (rename(oldpath, newpath) == -1)
1223 status =
1224 errno_to_portable(errno);
1225 else
1226 status = SSH2_FX_OK;
1227 }
1228 } else {
1229 status = errno_to_portable(errno);
1230 }
1231 } else if (unlink(oldpath) == -1) {
Damien Millerb3207e82003-03-26 16:01:11 +11001232 status = errno_to_portable(errno);
1233 /* clean spare link */
1234 unlink(newpath);
1235 } else
1236 status = SSH2_FX_OK;
1237 } else if (stat(newpath, &sb) == -1) {
1238 if (rename(oldpath, newpath) == -1)
1239 status = errno_to_portable(errno);
1240 else
1241 status = SSH2_FX_OK;
1242 }
Damien Miller7b28dc52000-09-05 13:34:53 +11001243 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001244 free(oldpath);
1245 free(newpath);
Damien Miller7b28dc52000-09-05 13:34:53 +11001246}
1247
Ben Lindstrombba81212001-06-25 05:01:22 +00001248static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001249process_readlink(u_int32_t id)
Damien Miller058316f2001-03-08 10:08:49 +11001250{
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001251 int r, len;
deraadt@openbsd.org087266e2015-01-20 23:14:00 +00001252 char buf[PATH_MAX];
Damien Miller058316f2001-03-08 10:08:49 +11001253 char *path;
1254
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001255 if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0)
1256 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1257
Damien Millerfef95ad2006-07-10 20:46:55 +10001258 debug3("request %u: readlink", id);
1259 verbose("readlink \"%s\"", path);
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001260 if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1)
Damien Miller058316f2001-03-08 10:08:49 +11001261 send_status(id, errno_to_portable(errno));
1262 else {
1263 Stat s;
Damien Miller9f0f5c62001-12-21 14:45:46 +11001264
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001265 buf[len] = '\0';
Damien Miller058316f2001-03-08 10:08:49 +11001266 attrib_clear(&s.attrib);
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001267 s.name = s.long_name = buf;
Damien Miller058316f2001-03-08 10:08:49 +11001268 send_names(id, 1, &s);
1269 }
Darren Tuckera627d422013-06-02 07:31:17 +10001270 free(path);
Damien Miller058316f2001-03-08 10:08:49 +11001271}
1272
Ben Lindstrombba81212001-06-25 05:01:22 +00001273static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001274process_symlink(u_int32_t id)
Damien Miller058316f2001-03-08 10:08:49 +11001275{
Damien Miller058316f2001-03-08 10:08:49 +11001276 char *oldpath, *newpath;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001277 int r, status;
Damien Miller058316f2001-03-08 10:08:49 +11001278
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001279 if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 ||
1280 (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0)
1281 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1282
Damien Millerfef95ad2006-07-10 20:46:55 +10001283 debug3("request %u: symlink", id);
1284 logit("symlink old \"%s\" new \"%s\"", oldpath, newpath);
Damien Miller9e51a732003-02-24 11:58:44 +11001285 /* this will fail if 'newpath' exists */
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001286 r = symlink(oldpath, newpath);
1287 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Miller058316f2001-03-08 10:08:49 +11001288 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001289 free(oldpath);
1290 free(newpath);
Damien Miller058316f2001-03-08 10:08:49 +11001291}
1292
Ben Lindstrombba81212001-06-25 05:01:22 +00001293static void
Damien Miller7c296612008-03-07 18:33:53 +11001294process_extended_posix_rename(u_int32_t id)
1295{
1296 char *oldpath, *newpath;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001297 int r, status;
Damien Miller7c296612008-03-07 18:33:53 +11001298
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001299 if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 ||
1300 (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0)
1301 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1302
Damien Miller7c296612008-03-07 18:33:53 +11001303 debug3("request %u: posix-rename", id);
1304 logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001305 r = rename(oldpath, newpath);
1306 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Darren Tuckerdb7bf822010-01-09 22:24:33 +11001307 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001308 free(oldpath);
1309 free(newpath);
Damien Miller7c296612008-03-07 18:33:53 +11001310}
1311
1312static void
Damien Millerd671e5a2008-05-19 14:53:33 +10001313process_extended_statvfs(u_int32_t id)
1314{
1315 char *path;
1316 struct statvfs st;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001317 int r;
Damien Millerd671e5a2008-05-19 14:53:33 +10001318
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001319 if ((r = sshbuf_get_cstring(iqueue, &path, NULL)) != 0)
1320 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Darren Tucker2aca1592014-01-19 15:25:34 +11001321 debug3("request %u: statvfs", id);
1322 logit("statvfs \"%s\"", path);
Damien Millerd671e5a2008-05-19 14:53:33 +10001323
1324 if (statvfs(path, &st) != 0)
1325 send_status(id, errno_to_portable(errno));
1326 else
1327 send_statvfs(id, &st);
Darren Tuckera627d422013-06-02 07:31:17 +10001328 free(path);
Damien Millerd671e5a2008-05-19 14:53:33 +10001329}
1330
1331static void
1332process_extended_fstatvfs(u_int32_t id)
1333{
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001334 int r, handle, fd;
Damien Millerd671e5a2008-05-19 14:53:33 +10001335 struct statvfs st;
1336
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001337 if ((r = get_handle(iqueue, &handle)) != 0)
1338 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Millerd671e5a2008-05-19 14:53:33 +10001339 debug("request %u: fstatvfs \"%s\" (handle %u)",
1340 id, handle_to_name(handle), handle);
1341 if ((fd = handle_to_fd(handle)) < 0) {
1342 send_status(id, SSH2_FX_FAILURE);
1343 return;
1344 }
1345 if (fstatvfs(fd, &st) != 0)
1346 send_status(id, errno_to_portable(errno));
1347 else
1348 send_statvfs(id, &st);
1349}
1350
1351static void
Darren Tuckeraf1f9092010-12-05 09:02:47 +11001352process_extended_hardlink(u_int32_t id)
1353{
1354 char *oldpath, *newpath;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001355 int r, status;
Darren Tuckeraf1f9092010-12-05 09:02:47 +11001356
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001357 if ((r = sshbuf_get_cstring(iqueue, &oldpath, NULL)) != 0 ||
1358 (r = sshbuf_get_cstring(iqueue, &newpath, NULL)) != 0)
1359 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1360
Darren Tuckeraf1f9092010-12-05 09:02:47 +11001361 debug3("request %u: hardlink", id);
1362 logit("hardlink old \"%s\" new \"%s\"", oldpath, newpath);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001363 r = link(oldpath, newpath);
1364 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Darren Tuckeraf1f9092010-12-05 09:02:47 +11001365 send_status(id, status);
Darren Tuckera627d422013-06-02 07:31:17 +10001366 free(oldpath);
1367 free(newpath);
Darren Tuckeraf1f9092010-12-05 09:02:47 +11001368}
1369
1370static void
Damien Millerf29238e2013-10-17 11:48:52 +11001371process_extended_fsync(u_int32_t id)
1372{
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001373 int handle, fd, r, status = SSH2_FX_OP_UNSUPPORTED;
Damien Millerf29238e2013-10-17 11:48:52 +11001374
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001375 if ((r = get_handle(iqueue, &handle)) != 0)
1376 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Millerf29238e2013-10-17 11:48:52 +11001377 debug3("request %u: fsync (handle %u)", id, handle);
1378 verbose("fsync \"%s\"", handle_to_name(handle));
1379 if ((fd = handle_to_fd(handle)) < 0)
1380 status = SSH2_FX_NO_SUCH_FILE;
1381 else if (handle_is_ok(handle, HANDLE_FILE)) {
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001382 r = fsync(fd);
1383 status = (r == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
Damien Millerf29238e2013-10-17 11:48:52 +11001384 }
1385 send_status(id, status);
1386}
1387
1388static void
djm@openbsd.orgdbbc7e02019-01-16 23:22:10 +00001389process_extended_lsetstat(u_int32_t id)
1390{
1391 Attrib a;
1392 char *name;
1393 int r, status = SSH2_FX_OK;
1394
1395 if ((r = sshbuf_get_cstring(iqueue, &name, NULL)) != 0 ||
1396 (r = decode_attrib(iqueue, &a)) != 0)
1397 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1398
1399 debug("request %u: lsetstat name \"%s\"", id, name);
1400 if (a.flags & SSH2_FILEXFER_ATTR_SIZE) {
1401 /* nonsensical for links */
1402 status = SSH2_FX_BAD_MESSAGE;
1403 goto out;
1404 }
1405 if (a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
1406 logit("set \"%s\" mode %04o", name, a.perm);
1407 r = fchmodat(AT_FDCWD, name,
1408 a.perm & 07777, AT_SYMLINK_NOFOLLOW);
1409 if (r == -1)
1410 status = errno_to_portable(errno);
1411 }
1412 if (a.flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
1413 char buf[64];
1414 time_t t = a.mtime;
1415
1416 strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S",
1417 localtime(&t));
1418 logit("set \"%s\" modtime %s", name, buf);
1419 r = utimensat(AT_FDCWD, name,
1420 attrib_to_ts(&a), AT_SYMLINK_NOFOLLOW);
1421 if (r == -1)
1422 status = errno_to_portable(errno);
1423 }
1424 if (a.flags & SSH2_FILEXFER_ATTR_UIDGID) {
1425 logit("set \"%s\" owner %lu group %lu", name,
1426 (u_long)a.uid, (u_long)a.gid);
1427 r = fchownat(AT_FDCWD, name, a.uid, a.gid,
1428 AT_SYMLINK_NOFOLLOW);
1429 if (r == -1)
1430 status = errno_to_portable(errno);
1431 }
1432 out:
1433 send_status(id, status);
1434 free(name);
1435}
1436
1437static void
Damien Miller6eaeebf2013-10-15 11:55:57 +11001438process_extended(u_int32_t id)
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001439{
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001440 char *request;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001441 int i, r;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001442
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001443 if ((r = sshbuf_get_cstring(iqueue, &request, NULL)) != 0)
1444 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller6eaeebf2013-10-15 11:55:57 +11001445 for (i = 0; extended_handlers[i].handler != NULL; i++) {
1446 if (strcmp(request, extended_handlers[i].ext_name) == 0) {
1447 if (!request_permitted(&extended_handlers[i]))
1448 send_status(id, SSH2_FX_PERMISSION_DENIED);
1449 else
1450 extended_handlers[i].handler(id);
1451 break;
1452 }
1453 }
1454 if (extended_handlers[i].handler == NULL) {
1455 error("Unknown extended request \"%.100s\"", request);
Damien Miller7c296612008-03-07 18:33:53 +11001456 send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
Damien Miller6eaeebf2013-10-15 11:55:57 +11001457 }
Darren Tuckera627d422013-06-02 07:31:17 +10001458 free(request);
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001459}
Damien Miller7b28dc52000-09-05 13:34:53 +11001460
1461/* stolen from ssh-agent */
1462
Ben Lindstrombba81212001-06-25 05:01:22 +00001463static void
Damien Miller7b28dc52000-09-05 13:34:53 +11001464process(void)
1465{
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001466 u_int msg_len;
1467 u_int buf_len;
1468 u_int consumed;
1469 u_char type;
1470 const u_char *cp;
1471 int i, r;
Damien Miller6eaeebf2013-10-15 11:55:57 +11001472 u_int32_t id;
Damien Miller7b28dc52000-09-05 13:34:53 +11001473
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001474 buf_len = sshbuf_len(iqueue);
Ben Lindstrom2c140472002-06-06 21:57:54 +00001475 if (buf_len < 5)
Damien Miller7b28dc52000-09-05 13:34:53 +11001476 return; /* Incomplete message. */
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001477 cp = sshbuf_ptr(iqueue);
Damien Miller3f941882006-03-31 23:13:02 +11001478 msg_len = get_u32(cp);
Damien Miller54446182006-01-02 23:40:50 +11001479 if (msg_len > SFTP_MAX_MSG_LENGTH) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001480 error("bad message from %s local user %s",
1481 client_addr, pw->pw_name);
Damien Millerdfc24252008-02-10 22:29:40 +11001482 sftp_server_cleanup_exit(11);
Damien Miller7b28dc52000-09-05 13:34:53 +11001483 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001484 if (buf_len < msg_len + 4)
Damien Miller7b28dc52000-09-05 13:34:53 +11001485 return;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001486 if ((r = sshbuf_consume(iqueue, 4)) != 0)
1487 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Ben Lindstrom2c140472002-06-06 21:57:54 +00001488 buf_len -= 4;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001489 if ((r = sshbuf_get_u8(iqueue, &type)) != 0)
1490 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller6eaeebf2013-10-15 11:55:57 +11001491
Damien Miller7b28dc52000-09-05 13:34:53 +11001492 switch (type) {
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001493 case SSH2_FXP_INIT:
Damien Miller7b28dc52000-09-05 13:34:53 +11001494 process_init();
Damien Miller6eaeebf2013-10-15 11:55:57 +11001495 init_done = 1;
Damien Miller058316f2001-03-08 10:08:49 +11001496 break;
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001497 case SSH2_FXP_EXTENDED:
Damien Miller6eaeebf2013-10-15 11:55:57 +11001498 if (!init_done)
1499 fatal("Received extended request before init");
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001500 if ((r = sshbuf_get_u32(iqueue, &id)) != 0)
1501 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller6eaeebf2013-10-15 11:55:57 +11001502 process_extended(id);
Ben Lindstrom2f959b42001-01-11 06:20:23 +00001503 break;
Damien Miller7b28dc52000-09-05 13:34:53 +11001504 default:
Damien Miller6eaeebf2013-10-15 11:55:57 +11001505 if (!init_done)
1506 fatal("Received %u request before init", type);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001507 if ((r = sshbuf_get_u32(iqueue, &id)) != 0)
1508 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller6eaeebf2013-10-15 11:55:57 +11001509 for (i = 0; handlers[i].handler != NULL; i++) {
1510 if (type == handlers[i].type) {
1511 if (!request_permitted(&handlers[i])) {
1512 send_status(id,
1513 SSH2_FX_PERMISSION_DENIED);
1514 } else {
1515 handlers[i].handler(id);
1516 }
1517 break;
1518 }
1519 }
1520 if (handlers[i].handler == NULL)
1521 error("Unknown message %u", type);
Damien Miller7b28dc52000-09-05 13:34:53 +11001522 }
Ben Lindstrom2c140472002-06-06 21:57:54 +00001523 /* discard the remaining bytes from the current packet */
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001524 if (buf_len < sshbuf_len(iqueue)) {
Damien Millerdfc24252008-02-10 22:29:40 +11001525 error("iqueue grew unexpectedly");
1526 sftp_server_cleanup_exit(255);
1527 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001528 consumed = buf_len - sshbuf_len(iqueue);
Damien Millerdfc24252008-02-10 22:29:40 +11001529 if (msg_len < consumed) {
Damien Miller6eaeebf2013-10-15 11:55:57 +11001530 error("msg_len %u < consumed %u", msg_len, consumed);
Damien Millerdfc24252008-02-10 22:29:40 +11001531 sftp_server_cleanup_exit(255);
1532 }
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001533 if (msg_len > consumed &&
1534 (r = sshbuf_consume(iqueue, msg_len - consumed)) != 0)
1535 fatal("%s: buffer error: %s", __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +11001536}
1537
Damien Millerfef95ad2006-07-10 20:46:55 +10001538/* Cleanup handler that logs active handles upon normal exit */
1539void
Damien Millerdfc24252008-02-10 22:29:40 +11001540sftp_server_cleanup_exit(int i)
Damien Millerfef95ad2006-07-10 20:46:55 +10001541{
1542 if (pw != NULL && client_addr != NULL) {
1543 handle_log_exit();
1544 logit("session closed for local user %s from [%s]",
1545 pw->pw_name, client_addr);
1546 }
1547 _exit(i);
1548}
1549
1550static void
Damien Millerdfc24252008-02-10 22:29:40 +11001551sftp_server_usage(void)
Damien Millerfef95ad2006-07-10 20:46:55 +10001552{
1553 extern char *__progname;
1554
1555 fprintf(stderr,
Damien Milleraa7ad302013-01-09 15:58:21 +11001556 "usage: %s [-ehR] [-d start_directory] [-f log_facility] "
Damien Miller6efab272013-10-15 12:07:05 +11001557 "[-l log_level]\n\t[-P blacklisted_requests] "
1558 "[-p whitelisted_requests] [-u umask]\n"
1559 " %s -Q protocol_feature\n",
1560 __progname, __progname);
Damien Millerfef95ad2006-07-10 20:46:55 +10001561 exit(1);
1562}
1563
Damien Miller7b28dc52000-09-05 13:34:53 +11001564int
Damien Millerd8cb1f12008-02-10 22:40:12 +11001565sftp_server_main(int argc, char **argv, struct passwd *user_pw)
Damien Miller7b28dc52000-09-05 13:34:53 +11001566{
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001567 fd_set *rset, *wset;
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001568 int i, r, in, out, max, ch, skipargs = 0, log_stderr = 0;
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001569 ssize_t len, olen, set_size;
Damien Millerfef95ad2006-07-10 20:46:55 +10001570 SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
djm@openbsd.org9c935dd2018-06-01 03:33:53 +00001571 char *cp, *homedir = NULL, uidstr[32], buf[4*4096];
Damien Miller07331212010-11-05 10:20:31 +11001572 long mask;
Damien Millerfef95ad2006-07-10 20:46:55 +10001573
Damien Millerfef95ad2006-07-10 20:46:55 +10001574 extern char *optarg;
1575 extern char *__progname;
Damien Miller7b28dc52000-09-05 13:34:53 +11001576
dtucker@openbsd.orgffb1e7e2016-02-15 09:47:49 +00001577 ssh_malloc_init(); /* must be called before any mallocs */
Damien Millerfef95ad2006-07-10 20:46:55 +10001578 __progname = ssh_get_progname(argv[0]);
1579 log_init(__progname, log_level, log_facility, log_stderr);
Ben Lindstromc7f4ccd2001-03-15 00:09:15 +00001580
Damien Miller502ab0e2013-01-09 15:57:36 +11001581 pw = pwcopy(user_pw);
1582
Damien Miller6eaeebf2013-10-15 11:55:57 +11001583 while (!skipargs && (ch = getopt(argc, argv,
1584 "d:f:l:P:p:Q:u:cehR")) != -1) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001585 switch (ch) {
Damien Miller6eaeebf2013-10-15 11:55:57 +11001586 case 'Q':
1587 if (strcasecmp(optarg, "requests") != 0) {
1588 fprintf(stderr, "Invalid query type\n");
1589 exit(1);
1590 }
1591 for (i = 0; handlers[i].handler != NULL; i++)
1592 printf("%s\n", handlers[i].name);
1593 for (i = 0; extended_handlers[i].handler != NULL; i++)
1594 printf("%s\n", extended_handlers[i].name);
1595 exit(0);
1596 break;
Darren Tuckerdb7bf822010-01-09 22:24:33 +11001597 case 'R':
1598 readonly = 1;
1599 break;
Damien Millerfef95ad2006-07-10 20:46:55 +10001600 case 'c':
1601 /*
1602 * Ignore all arguments if we are invoked as a
Damien Millerd7834352006-08-05 12:39:39 +10001603 * shell using "sftp-server -c command"
Damien Millerfef95ad2006-07-10 20:46:55 +10001604 */
1605 skipargs = 1;
1606 break;
1607 case 'e':
1608 log_stderr = 1;
1609 break;
1610 case 'l':
1611 log_level = log_level_number(optarg);
1612 if (log_level == SYSLOG_LEVEL_NOT_SET)
1613 error("Invalid log level \"%s\"", optarg);
1614 break;
1615 case 'f':
1616 log_facility = log_facility_number(optarg);
Damien Miller35e18db2007-09-17 16:11:33 +10001617 if (log_facility == SYSLOG_FACILITY_NOT_SET)
Damien Millerfef95ad2006-07-10 20:46:55 +10001618 error("Invalid log facility \"%s\"", optarg);
1619 break;
Damien Miller502ab0e2013-01-09 15:57:36 +11001620 case 'd':
1621 cp = tilde_expand_filename(optarg, user_pw->pw_uid);
djm@openbsd.org9c935dd2018-06-01 03:33:53 +00001622 snprintf(uidstr, sizeof(uidstr), "%llu",
1623 (unsigned long long)pw->pw_uid);
Damien Miller502ab0e2013-01-09 15:57:36 +11001624 homedir = percent_expand(cp, "d", user_pw->pw_dir,
djm@openbsd.org9c935dd2018-06-01 03:33:53 +00001625 "u", user_pw->pw_name, "U", uidstr, (char *)NULL);
Damien Miller502ab0e2013-01-09 15:57:36 +11001626 free(cp);
1627 break;
Damien Miller6eaeebf2013-10-15 11:55:57 +11001628 case 'p':
1629 if (request_whitelist != NULL)
1630 fatal("Permitted requests already set");
1631 request_whitelist = xstrdup(optarg);
1632 break;
1633 case 'P':
1634 if (request_blacklist != NULL)
1635 fatal("Refused requests already set");
1636 request_blacklist = xstrdup(optarg);
1637 break;
Darren Tucker7dc48502009-10-07 08:44:42 +11001638 case 'u':
Damien Miller07331212010-11-05 10:20:31 +11001639 errno = 0;
1640 mask = strtol(optarg, &cp, 8);
1641 if (mask < 0 || mask > 0777 || *cp != '\0' ||
1642 cp == optarg || (mask == 0 && errno != 0))
1643 fatal("Invalid umask \"%s\"", optarg);
1644 (void)umask((mode_t)mask);
Darren Tucker7dc48502009-10-07 08:44:42 +11001645 break;
Damien Millerfef95ad2006-07-10 20:46:55 +10001646 case 'h':
1647 default:
Damien Millerdfc24252008-02-10 22:29:40 +11001648 sftp_server_usage();
Damien Millerfef95ad2006-07-10 20:46:55 +10001649 }
1650 }
1651
1652 log_init(__progname, log_level, log_facility, log_stderr);
1653
Damien Miller14928b72014-04-01 14:38:07 +11001654 /*
Darren Tucker0fb7f592016-06-09 16:23:07 +10001655 * On platforms where we can, avoid making /proc/self/{mem,maps}
Damien Miller14928b72014-04-01 14:38:07 +11001656 * available to the user so that sftp access doesn't automatically
1657 * imply arbitrary code execution access that will break
1658 * restricted configurations.
1659 */
Darren Tucker0fb7f592016-06-09 16:23:07 +10001660 platform_disable_tracing(1); /* strict */
Damien Miller14928b72014-04-01 14:38:07 +11001661
Damien Miller4626cba2016-01-08 14:24:56 +11001662 /* Drop any fine-grained privileges we don't need */
1663 platform_pledge_sftp_server();
1664
Damien Millerfef95ad2006-07-10 20:46:55 +10001665 if ((cp = getenv("SSH_CONNECTION")) != NULL) {
1666 client_addr = xstrdup(cp);
Damien Millerdfc24252008-02-10 22:29:40 +11001667 if ((cp = strchr(client_addr, ' ')) == NULL) {
1668 error("Malformed SSH_CONNECTION variable: \"%s\"",
Damien Millerfef95ad2006-07-10 20:46:55 +10001669 getenv("SSH_CONNECTION"));
Damien Millerdfc24252008-02-10 22:29:40 +11001670 sftp_server_cleanup_exit(255);
1671 }
Damien Millerfef95ad2006-07-10 20:46:55 +10001672 *cp = '\0';
1673 } else
1674 client_addr = xstrdup("UNKNOWN");
1675
Damien Millerfef95ad2006-07-10 20:46:55 +10001676 logit("session opened for local user %s from [%s]",
1677 pw->pw_name, client_addr);
1678
Darren Tuckeraaf51d22010-01-08 19:04:49 +11001679 in = STDIN_FILENO;
1680 out = STDOUT_FILENO;
Damien Miller7b28dc52000-09-05 13:34:53 +11001681
Damien Miller402b3312001-04-14 00:28:42 +10001682#ifdef HAVE_CYGWIN
1683 setmode(in, O_BINARY);
1684 setmode(out, O_BINARY);
1685#endif
1686
Damien Miller7b28dc52000-09-05 13:34:53 +11001687 max = 0;
1688 if (in > max)
1689 max = in;
1690 if (out > max)
1691 max = out;
1692
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001693 if ((iqueue = sshbuf_new()) == NULL)
1694 fatal("%s: sshbuf_new failed", __func__);
1695 if ((oqueue = sshbuf_new()) == NULL)
1696 fatal("%s: sshbuf_new failed", __func__);
Damien Miller7b28dc52000-09-05 13:34:53 +11001697
logan@openbsd.orgdb6f8dc2015-11-16 06:13:04 +00001698 rset = xcalloc(howmany(max + 1, NFDBITS), sizeof(fd_mask));
1699 wset = xcalloc(howmany(max + 1, NFDBITS), sizeof(fd_mask));
Damien Miller7b28dc52000-09-05 13:34:53 +11001700
Damien Miller502ab0e2013-01-09 15:57:36 +11001701 if (homedir != NULL) {
1702 if (chdir(homedir) != 0) {
1703 error("chdir to \"%s\" failed: %s", homedir,
1704 strerror(errno));
1705 }
1706 }
1707
logan@openbsd.orgdb6f8dc2015-11-16 06:13:04 +00001708 set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask);
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001709 for (;;) {
1710 memset(rset, 0, set_size);
1711 memset(wset, 0, set_size);
1712
Darren Tuckere9405982007-05-20 15:09:04 +10001713 /*
1714 * Ensure that we can read a full buffer and handle
1715 * the worst-case length packet it can generate,
1716 * otherwise apply backpressure by stopping reads.
1717 */
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001718 if ((r = sshbuf_check_reserve(iqueue, sizeof(buf))) == 0 &&
1719 (r = sshbuf_check_reserve(oqueue,
1720 SFTP_MAX_MSG_LENGTH)) == 0)
Darren Tuckere9405982007-05-20 15:09:04 +10001721 FD_SET(in, rset);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001722 else if (r != SSH_ERR_NO_BUFFER_SPACE)
1723 fatal("%s: sshbuf_check_reserve failed: %s",
1724 __func__, ssh_err(r));
Darren Tuckere9405982007-05-20 15:09:04 +10001725
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001726 olen = sshbuf_len(oqueue);
Damien Miller7b28dc52000-09-05 13:34:53 +11001727 if (olen > 0)
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001728 FD_SET(out, wset);
Damien Miller7b28dc52000-09-05 13:34:53 +11001729
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001730 if (select(max+1, rset, wset, NULL, NULL) < 0) {
Damien Miller7b28dc52000-09-05 13:34:53 +11001731 if (errno == EINTR)
1732 continue;
Damien Millerfef95ad2006-07-10 20:46:55 +10001733 error("select: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001734 sftp_server_cleanup_exit(2);
Damien Miller7b28dc52000-09-05 13:34:53 +11001735 }
1736
1737 /* copy stdin to iqueue */
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001738 if (FD_ISSET(in, rset)) {
Damien Miller7b28dc52000-09-05 13:34:53 +11001739 len = read(in, buf, sizeof buf);
1740 if (len == 0) {
1741 debug("read eof");
Damien Millerdfc24252008-02-10 22:29:40 +11001742 sftp_server_cleanup_exit(0);
Damien Miller7b28dc52000-09-05 13:34:53 +11001743 } else if (len < 0) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001744 error("read: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001745 sftp_server_cleanup_exit(1);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001746 } else if ((r = sshbuf_put(iqueue, buf, len)) != 0) {
1747 fatal("%s: buffer error: %s",
1748 __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +11001749 }
1750 }
1751 /* send oqueue to stdout */
Ben Lindstromcb80bdf2001-03-05 07:06:12 +00001752 if (FD_ISSET(out, wset)) {
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001753 len = write(out, sshbuf_ptr(oqueue), olen);
Damien Miller7b28dc52000-09-05 13:34:53 +11001754 if (len < 0) {
Damien Millerfef95ad2006-07-10 20:46:55 +10001755 error("write: %s", strerror(errno));
Damien Millerdfc24252008-02-10 22:29:40 +11001756 sftp_server_cleanup_exit(1);
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001757 } else if ((r = sshbuf_consume(oqueue, len)) != 0) {
1758 fatal("%s: buffer error: %s",
1759 __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +11001760 }
1761 }
Darren Tuckere9405982007-05-20 15:09:04 +10001762
1763 /*
1764 * Process requests from client if we can fit the results
1765 * into the output buffer, otherwise stop processing input
1766 * and let the output queue drain.
1767 */
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001768 r = sshbuf_check_reserve(oqueue, SFTP_MAX_MSG_LENGTH);
1769 if (r == 0)
Darren Tuckere9405982007-05-20 15:09:04 +10001770 process();
djm@openbsd.org7d845f42015-01-14 13:54:13 +00001771 else if (r != SSH_ERR_NO_BUFFER_SPACE)
1772 fatal("%s: sshbuf_check_reserve: %s",
1773 __func__, ssh_err(r));
Damien Miller7b28dc52000-09-05 13:34:53 +11001774 }
1775}