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b5e300c2 | 1 | /* |
71c1910f | 2 | * Copyright (c) 2000-2004 Markus Friedl. All rights reserved. |
b5e300c2 | 3 | * |
71c1910f | 4 | * Permission to use, copy, modify, and distribute this software for any |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
b5e300c2 | 7 | * |
71c1910f | 8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
b5e300c2 | 15 | */ |
16 | #include "includes.h" | |
71c1910f | 17 | RCSID("$OpenBSD: sftp-server.c,v 1.45 2004/02/19 21:15:04 markus Exp $"); |
b5e300c2 | 18 | |
b5e300c2 | 19 | #include "buffer.h" |
20 | #include "bufaux.h" | |
21 | #include "getput.h" | |
42f11eb2 | 22 | #include "log.h" |
b5e300c2 | 23 | #include "xmalloc.h" |
24 | ||
f546c780 | 25 | #include "sftp.h" |
61e96248 | 26 | #include "sftp-common.h" |
b5e300c2 | 27 | |
28 | /* helper */ | |
f546c780 | 29 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 30 | #define get_int() buffer_get_int(&iqueue); |
31 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
f546c780 | 32 | #define TRACE debug |
b5e300c2 | 33 | |
260d427b | 34 | #ifdef HAVE___PROGNAME |
35 | extern char *__progname; | |
36 | #else | |
37 | char *__progname; | |
38 | #endif | |
39 | ||
b5e300c2 | 40 | /* input and output queue */ |
41 | Buffer iqueue; | |
42 | Buffer oqueue; | |
43 | ||
3a7fe5ba | 44 | /* Version of client */ |
45 | int version; | |
46 | ||
d7ded285 | 47 | /* portable attributes, etc. */ |
b5e300c2 | 48 | |
b5e300c2 | 49 | typedef struct Stat Stat; |
50 | ||
61e96248 | 51 | struct Stat { |
b5e300c2 | 52 | char *name; |
53 | char *long_name; | |
54 | Attrib attrib; | |
55 | }; | |
56 | ||
396c147e | 57 | static int |
b5e300c2 | 58 | errno_to_portable(int unixerrno) |
59 | { | |
60 | int ret = 0; | |
dce9bac5 | 61 | |
b5e300c2 | 62 | switch (unixerrno) { |
63 | case 0: | |
f546c780 | 64 | ret = SSH2_FX_OK; |
b5e300c2 | 65 | break; |
66 | case ENOENT: | |
67 | case ENOTDIR: | |
68 | case EBADF: | |
69 | case ELOOP: | |
f546c780 | 70 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 71 | break; |
72 | case EPERM: | |
73 | case EACCES: | |
74 | case EFAULT: | |
f546c780 | 75 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 76 | break; |
77 | case ENAMETOOLONG: | |
78 | case EINVAL: | |
f546c780 | 79 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 80 | break; |
81 | default: | |
f546c780 | 82 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 83 | break; |
84 | } | |
85 | return ret; | |
86 | } | |
87 | ||
396c147e | 88 | static int |
b5e300c2 | 89 | flags_from_portable(int pflags) |
90 | { | |
91 | int flags = 0; | |
dce9bac5 | 92 | |
79ddf6db | 93 | if ((pflags & SSH2_FXF_READ) && |
94 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 95 | flags = O_RDWR; |
f546c780 | 96 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 97 | flags = O_RDONLY; |
f546c780 | 98 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 99 | flags = O_WRONLY; |
100 | } | |
f546c780 | 101 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 102 | flags |= O_CREAT; |
f546c780 | 103 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 104 | flags |= O_TRUNC; |
f546c780 | 105 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 106 | flags |= O_EXCL; |
107 | return flags; | |
108 | } | |
109 | ||
396c147e | 110 | static Attrib * |
b5e300c2 | 111 | get_attrib(void) |
112 | { | |
113 | return decode_attrib(&iqueue); | |
114 | } | |
115 | ||
116 | /* handle handles */ | |
117 | ||
118 | typedef struct Handle Handle; | |
119 | struct Handle { | |
120 | int use; | |
121 | DIR *dirp; | |
122 | int fd; | |
123 | char *name; | |
124 | }; | |
dce9bac5 | 125 | |
b5e300c2 | 126 | enum { |
127 | HANDLE_UNUSED, | |
128 | HANDLE_DIR, | |
129 | HANDLE_FILE | |
130 | }; | |
dce9bac5 | 131 | |
b5e300c2 | 132 | Handle handles[100]; |
133 | ||
396c147e | 134 | static void |
b5e300c2 | 135 | handle_init(void) |
136 | { | |
137 | int i; | |
dce9bac5 | 138 | |
184eed6a | 139 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
b5e300c2 | 140 | handles[i].use = HANDLE_UNUSED; |
141 | } | |
142 | ||
396c147e | 143 | static int |
b6c7b7b7 | 144 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 145 | { |
146 | int i; | |
dce9bac5 | 147 | |
184eed6a | 148 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
b5e300c2 | 149 | if (handles[i].use == HANDLE_UNUSED) { |
150 | handles[i].use = use; | |
151 | handles[i].dirp = dirp; | |
152 | handles[i].fd = fd; | |
3e2f2431 | 153 | handles[i].name = xstrdup(name); |
b5e300c2 | 154 | return i; |
155 | } | |
156 | } | |
157 | return -1; | |
158 | } | |
159 | ||
396c147e | 160 | static int |
b5e300c2 | 161 | handle_is_ok(int i, int type) |
162 | { | |
f546c780 | 163 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && |
164 | handles[i].use == type; | |
b5e300c2 | 165 | } |
166 | ||
396c147e | 167 | static int |
b5e300c2 | 168 | handle_to_string(int handle, char **stringp, int *hlenp) |
169 | { | |
b5e300c2 | 170 | if (stringp == NULL || hlenp == NULL) |
171 | return -1; | |
b5c334cc | 172 | *stringp = xmalloc(sizeof(int32_t)); |
173 | PUT_32BIT(*stringp, handle); | |
174 | *hlenp = sizeof(int32_t); | |
b5e300c2 | 175 | return 0; |
176 | } | |
177 | ||
396c147e | 178 | static int |
b6c7b7b7 | 179 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 180 | { |
b5c334cc | 181 | int val; |
dce9bac5 | 182 | |
b5c334cc | 183 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 184 | return -1; |
b5c334cc | 185 | val = GET_32BIT(handle); |
b5e300c2 | 186 | if (handle_is_ok(val, HANDLE_FILE) || |
187 | handle_is_ok(val, HANDLE_DIR)) | |
188 | return val; | |
189 | return -1; | |
190 | } | |
191 | ||
396c147e | 192 | static char * |
b5e300c2 | 193 | handle_to_name(int handle) |
194 | { | |
195 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
196 | handle_is_ok(handle, HANDLE_FILE)) | |
197 | return handles[handle].name; | |
198 | return NULL; | |
199 | } | |
200 | ||
396c147e | 201 | static DIR * |
b5e300c2 | 202 | handle_to_dir(int handle) |
203 | { | |
204 | if (handle_is_ok(handle, HANDLE_DIR)) | |
205 | return handles[handle].dirp; | |
206 | return NULL; | |
207 | } | |
208 | ||
396c147e | 209 | static int |
b5e300c2 | 210 | handle_to_fd(int handle) |
211 | { | |
2b87da3b | 212 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 213 | return handles[handle].fd; |
214 | return -1; | |
215 | } | |
216 | ||
396c147e | 217 | static int |
b5e300c2 | 218 | handle_close(int handle) |
219 | { | |
220 | int ret = -1; | |
dce9bac5 | 221 | |
b5e300c2 | 222 | if (handle_is_ok(handle, HANDLE_FILE)) { |
223 | ret = close(handles[handle].fd); | |
224 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 225 | xfree(handles[handle].name); |
b5e300c2 | 226 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
227 | ret = closedir(handles[handle].dirp); | |
228 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 229 | xfree(handles[handle].name); |
b5e300c2 | 230 | } else { |
231 | errno = ENOENT; | |
232 | } | |
233 | return ret; | |
234 | } | |
235 | ||
396c147e | 236 | static int |
b5e300c2 | 237 | get_handle(void) |
238 | { | |
239 | char *handle; | |
f546c780 | 240 | int val = -1; |
bcbf86ec | 241 | u_int hlen; |
dce9bac5 | 242 | |
b5e300c2 | 243 | handle = get_string(&hlen); |
f546c780 | 244 | if (hlen < 256) |
245 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 246 | xfree(handle); |
247 | return val; | |
248 | } | |
249 | ||
250 | /* send replies */ | |
251 | ||
396c147e | 252 | static void |
b5e300c2 | 253 | send_msg(Buffer *m) |
254 | { | |
255 | int mlen = buffer_len(m); | |
dce9bac5 | 256 | |
b5e300c2 | 257 | buffer_put_int(&oqueue, mlen); |
258 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
259 | buffer_consume(m, mlen); | |
260 | } | |
261 | ||
396c147e | 262 | static void |
b5e300c2 | 263 | send_status(u_int32_t id, u_int32_t error) |
264 | { | |
265 | Buffer msg; | |
3a7fe5ba | 266 | const char *status_messages[] = { |
267 | "Success", /* SSH_FX_OK */ | |
268 | "End of file", /* SSH_FX_EOF */ | |
269 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
270 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
271 | "Failure", /* SSH_FX_FAILURE */ | |
272 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
273 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
274 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
275 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
276 | "Unknown error" /* Others */ | |
277 | }; | |
dce9bac5 | 278 | |
9906a836 | 279 | TRACE("sent status id %u error %u", id, error); |
b5e300c2 | 280 | buffer_init(&msg); |
f546c780 | 281 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 282 | buffer_put_int(&msg, id); |
283 | buffer_put_int(&msg, error); | |
3a7fe5ba | 284 | if (version >= 3) { |
cd332296 | 285 | buffer_put_cstring(&msg, |
3a7fe5ba | 286 | status_messages[MIN(error,SSH2_FX_MAX)]); |
287 | buffer_put_cstring(&msg, ""); | |
288 | } | |
b5e300c2 | 289 | send_msg(&msg); |
290 | buffer_free(&msg); | |
291 | } | |
396c147e | 292 | static void |
b6c7b7b7 | 293 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 294 | { |
295 | Buffer msg; | |
dce9bac5 | 296 | |
b5e300c2 | 297 | buffer_init(&msg); |
298 | buffer_put_char(&msg, type); | |
299 | buffer_put_int(&msg, id); | |
300 | buffer_put_string(&msg, data, dlen); | |
301 | send_msg(&msg); | |
302 | buffer_free(&msg); | |
303 | } | |
304 | ||
396c147e | 305 | static void |
b6c7b7b7 | 306 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 307 | { |
9906a836 | 308 | TRACE("sent data id %u len %d", id, dlen); |
f546c780 | 309 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 310 | } |
311 | ||
396c147e | 312 | static void |
b5e300c2 | 313 | send_handle(u_int32_t id, int handle) |
314 | { | |
315 | char *string; | |
316 | int hlen; | |
dce9bac5 | 317 | |
b5e300c2 | 318 | handle_to_string(handle, &string, &hlen); |
9906a836 | 319 | TRACE("sent handle id %u handle %d", id, handle); |
f546c780 | 320 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 321 | xfree(string); |
322 | } | |
323 | ||
396c147e | 324 | static void |
b6c7b7b7 | 325 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 326 | { |
327 | Buffer msg; | |
328 | int i; | |
dce9bac5 | 329 | |
b5e300c2 | 330 | buffer_init(&msg); |
f546c780 | 331 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 332 | buffer_put_int(&msg, id); |
333 | buffer_put_int(&msg, count); | |
9906a836 | 334 | TRACE("sent names id %u count %d", id, count); |
b5e300c2 | 335 | for (i = 0; i < count; i++) { |
336 | buffer_put_cstring(&msg, stats[i].name); | |
337 | buffer_put_cstring(&msg, stats[i].long_name); | |
338 | encode_attrib(&msg, &stats[i].attrib); | |
339 | } | |
340 | send_msg(&msg); | |
341 | buffer_free(&msg); | |
342 | } | |
343 | ||
396c147e | 344 | static void |
b6c7b7b7 | 345 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 346 | { |
347 | Buffer msg; | |
dce9bac5 | 348 | |
9906a836 | 349 | TRACE("sent attrib id %u have 0x%x", id, a->flags); |
b5e300c2 | 350 | buffer_init(&msg); |
f546c780 | 351 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 352 | buffer_put_int(&msg, id); |
353 | encode_attrib(&msg, a); | |
354 | send_msg(&msg); | |
355 | buffer_free(&msg); | |
356 | } | |
357 | ||
358 | /* parse incoming */ | |
359 | ||
396c147e | 360 | static void |
b5e300c2 | 361 | process_init(void) |
362 | { | |
363 | Buffer msg; | |
b5e300c2 | 364 | |
802d93bb | 365 | version = get_int(); |
b5e300c2 | 366 | TRACE("client version %d", version); |
367 | buffer_init(&msg); | |
f546c780 | 368 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
369 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 370 | send_msg(&msg); |
371 | buffer_free(&msg); | |
372 | } | |
373 | ||
396c147e | 374 | static void |
b5e300c2 | 375 | process_open(void) |
376 | { | |
377 | u_int32_t id, pflags; | |
378 | Attrib *a; | |
379 | char *name; | |
f546c780 | 380 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 381 | |
382 | id = get_int(); | |
383 | name = get_string(NULL); | |
f546c780 | 384 | pflags = get_int(); /* portable flags */ |
b5e300c2 | 385 | a = get_attrib(); |
386 | flags = flags_from_portable(pflags); | |
f546c780 | 387 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
9906a836 | 388 | TRACE("open id %u name %s flags %d mode 0%o", id, name, pflags, mode); |
b5e300c2 | 389 | fd = open(name, flags, mode); |
390 | if (fd < 0) { | |
391 | status = errno_to_portable(errno); | |
392 | } else { | |
3e2f2431 | 393 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 394 | if (handle < 0) { |
395 | close(fd); | |
396 | } else { | |
397 | send_handle(id, handle); | |
f546c780 | 398 | status = SSH2_FX_OK; |
b5e300c2 | 399 | } |
400 | } | |
f546c780 | 401 | if (status != SSH2_FX_OK) |
b5e300c2 | 402 | send_status(id, status); |
403 | xfree(name); | |
404 | } | |
405 | ||
396c147e | 406 | static void |
b5e300c2 | 407 | process_close(void) |
408 | { | |
409 | u_int32_t id; | |
f546c780 | 410 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 411 | |
412 | id = get_int(); | |
413 | handle = get_handle(); | |
9906a836 | 414 | TRACE("close id %u handle %d", id, handle); |
b5e300c2 | 415 | ret = handle_close(handle); |
f546c780 | 416 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 417 | send_status(id, status); |
418 | } | |
419 | ||
396c147e | 420 | static void |
b5e300c2 | 421 | process_read(void) |
422 | { | |
423 | char buf[64*1024]; | |
f546c780 | 424 | u_int32_t id, len; |
425 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 426 | u_int64_t off; |
427 | ||
428 | id = get_int(); | |
429 | handle = get_handle(); | |
f546c780 | 430 | off = get_int64(); |
b5e300c2 | 431 | len = get_int(); |
432 | ||
9906a836 | 433 | TRACE("read id %u handle %d off %llu len %d", id, handle, |
490cad94 | 434 | (u_int64_t)off, len); |
b5e300c2 | 435 | if (len > sizeof buf) { |
436 | len = sizeof buf; | |
bbe88b6d | 437 | logit("read change len %d", len); |
b5e300c2 | 438 | } |
439 | fd = handle_to_fd(handle); | |
440 | if (fd >= 0) { | |
441 | if (lseek(fd, off, SEEK_SET) < 0) { | |
442 | error("process_read: seek failed"); | |
443 | status = errno_to_portable(errno); | |
444 | } else { | |
445 | ret = read(fd, buf, len); | |
446 | if (ret < 0) { | |
447 | status = errno_to_portable(errno); | |
448 | } else if (ret == 0) { | |
f546c780 | 449 | status = SSH2_FX_EOF; |
b5e300c2 | 450 | } else { |
451 | send_data(id, buf, ret); | |
f546c780 | 452 | status = SSH2_FX_OK; |
b5e300c2 | 453 | } |
454 | } | |
455 | } | |
f546c780 | 456 | if (status != SSH2_FX_OK) |
b5e300c2 | 457 | send_status(id, status); |
458 | } | |
459 | ||
396c147e | 460 | static void |
b5e300c2 | 461 | process_write(void) |
462 | { | |
f546c780 | 463 | u_int32_t id; |
b5e300c2 | 464 | u_int64_t off; |
bcbf86ec | 465 | u_int len; |
f546c780 | 466 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 467 | char *data; |
468 | ||
469 | id = get_int(); | |
470 | handle = get_handle(); | |
f546c780 | 471 | off = get_int64(); |
b5e300c2 | 472 | data = get_string(&len); |
473 | ||
9906a836 | 474 | TRACE("write id %u handle %d off %llu len %d", id, handle, |
490cad94 | 475 | (u_int64_t)off, len); |
b5e300c2 | 476 | fd = handle_to_fd(handle); |
477 | if (fd >= 0) { | |
478 | if (lseek(fd, off, SEEK_SET) < 0) { | |
479 | status = errno_to_portable(errno); | |
480 | error("process_write: seek failed"); | |
481 | } else { | |
482 | /* XXX ATOMICIO ? */ | |
483 | ret = write(fd, data, len); | |
484 | if (ret == -1) { | |
485 | error("process_write: write failed"); | |
486 | status = errno_to_portable(errno); | |
487 | } else if (ret == len) { | |
f546c780 | 488 | status = SSH2_FX_OK; |
b5e300c2 | 489 | } else { |
bbe88b6d | 490 | logit("nothing at all written"); |
b5e300c2 | 491 | } |
492 | } | |
493 | } | |
494 | send_status(id, status); | |
495 | xfree(data); | |
496 | } | |
497 | ||
396c147e | 498 | static void |
b5e300c2 | 499 | process_do_stat(int do_lstat) |
500 | { | |
b5c334cc | 501 | Attrib a; |
b5e300c2 | 502 | struct stat st; |
503 | u_int32_t id; | |
504 | char *name; | |
f546c780 | 505 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 506 | |
507 | id = get_int(); | |
508 | name = get_string(NULL); | |
9906a836 | 509 | TRACE("%sstat id %u name %s", do_lstat ? "l" : "", id, name); |
b5e300c2 | 510 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
511 | if (ret < 0) { | |
512 | status = errno_to_portable(errno); | |
513 | } else { | |
b5c334cc | 514 | stat_to_attrib(&st, &a); |
515 | send_attrib(id, &a); | |
f546c780 | 516 | status = SSH2_FX_OK; |
b5e300c2 | 517 | } |
f546c780 | 518 | if (status != SSH2_FX_OK) |
b5e300c2 | 519 | send_status(id, status); |
520 | xfree(name); | |
521 | } | |
522 | ||
396c147e | 523 | static void |
b5e300c2 | 524 | process_stat(void) |
525 | { | |
526 | process_do_stat(0); | |
527 | } | |
528 | ||
396c147e | 529 | static void |
b5e300c2 | 530 | process_lstat(void) |
531 | { | |
532 | process_do_stat(1); | |
533 | } | |
534 | ||
396c147e | 535 | static void |
b5e300c2 | 536 | process_fstat(void) |
537 | { | |
b5c334cc | 538 | Attrib a; |
b5e300c2 | 539 | struct stat st; |
540 | u_int32_t id; | |
f546c780 | 541 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 542 | |
543 | id = get_int(); | |
544 | handle = get_handle(); | |
9906a836 | 545 | TRACE("fstat id %u handle %d", id, handle); |
b5e300c2 | 546 | fd = handle_to_fd(handle); |
547 | if (fd >= 0) { | |
548 | ret = fstat(fd, &st); | |
549 | if (ret < 0) { | |
550 | status = errno_to_portable(errno); | |
551 | } else { | |
b5c334cc | 552 | stat_to_attrib(&st, &a); |
553 | send_attrib(id, &a); | |
f546c780 | 554 | status = SSH2_FX_OK; |
b5e300c2 | 555 | } |
556 | } | |
f546c780 | 557 | if (status != SSH2_FX_OK) |
b5e300c2 | 558 | send_status(id, status); |
559 | } | |
560 | ||
396c147e | 561 | static struct timeval * |
b6c7b7b7 | 562 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 563 | { |
564 | static struct timeval tv[2]; | |
dce9bac5 | 565 | |
b5e300c2 | 566 | tv[0].tv_sec = a->atime; |
567 | tv[0].tv_usec = 0; | |
568 | tv[1].tv_sec = a->mtime; | |
569 | tv[1].tv_usec = 0; | |
570 | return tv; | |
571 | } | |
572 | ||
396c147e | 573 | static void |
b5e300c2 | 574 | process_setstat(void) |
575 | { | |
576 | Attrib *a; | |
577 | u_int32_t id; | |
578 | char *name; | |
9906a836 | 579 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 580 | |
581 | id = get_int(); | |
582 | name = get_string(NULL); | |
583 | a = get_attrib(); | |
9906a836 | 584 | TRACE("setstat id %u name %s", id, name); |
cb476289 | 585 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
586 | ret = truncate(name, a->size); | |
587 | if (ret == -1) | |
588 | status = errno_to_portable(errno); | |
589 | } | |
f546c780 | 590 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
b5e300c2 | 591 | ret = chmod(name, a->perm & 0777); |
592 | if (ret == -1) | |
593 | status = errno_to_portable(errno); | |
594 | } | |
f546c780 | 595 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 596 | ret = utimes(name, attrib_to_tv(a)); |
597 | if (ret == -1) | |
598 | status = errno_to_portable(errno); | |
599 | } | |
408ba72f | 600 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
601 | ret = chown(name, a->uid, a->gid); | |
602 | if (ret == -1) | |
603 | status = errno_to_portable(errno); | |
604 | } | |
b5e300c2 | 605 | send_status(id, status); |
606 | xfree(name); | |
607 | } | |
608 | ||
396c147e | 609 | static void |
b5e300c2 | 610 | process_fsetstat(void) |
611 | { | |
612 | Attrib *a; | |
613 | u_int32_t id; | |
614 | int handle, fd, ret; | |
f546c780 | 615 | int status = SSH2_FX_OK; |
bcbf86ec | 616 | char *name; |
16e538d4 | 617 | |
b5e300c2 | 618 | id = get_int(); |
619 | handle = get_handle(); | |
620 | a = get_attrib(); | |
9906a836 | 621 | TRACE("fsetstat id %u handle %d", id, handle); |
b5e300c2 | 622 | fd = handle_to_fd(handle); |
623 | name = handle_to_name(handle); | |
16e538d4 | 624 | if (fd < 0 || name == NULL) { |
f546c780 | 625 | status = SSH2_FX_FAILURE; |
b5e300c2 | 626 | } else { |
cb476289 | 627 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
628 | ret = ftruncate(fd, a->size); | |
629 | if (ret == -1) | |
630 | status = errno_to_portable(errno); | |
631 | } | |
f546c780 | 632 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
2fd3c144 | 633 | #ifdef HAVE_FCHMOD |
b5e300c2 | 634 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 635 | #else |
c33f0b36 | 636 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 637 | #endif |
b5e300c2 | 638 | if (ret == -1) |
639 | status = errno_to_portable(errno); | |
640 | } | |
f546c780 | 641 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 642 | #ifdef HAVE_FUTIMES |
643 | ret = futimes(fd, attrib_to_tv(a)); | |
644 | #else | |
645 | ret = utimes(name, attrib_to_tv(a)); | |
646 | #endif | |
647 | if (ret == -1) | |
648 | status = errno_to_portable(errno); | |
649 | } | |
408ba72f | 650 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
01f13020 | 651 | #ifdef HAVE_FCHOWN |
408ba72f | 652 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 653 | #else |
654 | ret = chown(name, a->uid, a->gid); | |
655 | #endif | |
408ba72f | 656 | if (ret == -1) |
657 | status = errno_to_portable(errno); | |
658 | } | |
b5e300c2 | 659 | } |
660 | send_status(id, status); | |
661 | } | |
662 | ||
396c147e | 663 | static void |
b5e300c2 | 664 | process_opendir(void) |
665 | { | |
666 | DIR *dirp = NULL; | |
667 | char *path; | |
f546c780 | 668 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 669 | u_int32_t id; |
670 | ||
671 | id = get_int(); | |
672 | path = get_string(NULL); | |
9906a836 | 673 | TRACE("opendir id %u path %s", id, path); |
2b87da3b | 674 | dirp = opendir(path); |
b5e300c2 | 675 | if (dirp == NULL) { |
676 | status = errno_to_portable(errno); | |
677 | } else { | |
3e2f2431 | 678 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 679 | if (handle < 0) { |
680 | closedir(dirp); | |
681 | } else { | |
682 | send_handle(id, handle); | |
f546c780 | 683 | status = SSH2_FX_OK; |
b5e300c2 | 684 | } |
2b87da3b | 685 | |
b5e300c2 | 686 | } |
f546c780 | 687 | if (status != SSH2_FX_OK) |
b5e300c2 | 688 | send_status(id, status); |
689 | xfree(path); | |
690 | } | |
691 | ||
396c147e | 692 | static void |
b5e300c2 | 693 | process_readdir(void) |
694 | { | |
695 | DIR *dirp; | |
696 | struct dirent *dp; | |
697 | char *path; | |
698 | int handle; | |
699 | u_int32_t id; | |
700 | ||
701 | id = get_int(); | |
702 | handle = get_handle(); | |
9906a836 | 703 | TRACE("readdir id %u handle %d", id, handle); |
b5e300c2 | 704 | dirp = handle_to_dir(handle); |
705 | path = handle_to_name(handle); | |
706 | if (dirp == NULL || path == NULL) { | |
f546c780 | 707 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 708 | } else { |
b5e300c2 | 709 | struct stat st; |
710 | char pathname[1024]; | |
711 | Stat *stats; | |
712 | int nstats = 10, count = 0, i; | |
9906a836 | 713 | |
b5e300c2 | 714 | stats = xmalloc(nstats * sizeof(Stat)); |
715 | while ((dp = readdir(dirp)) != NULL) { | |
716 | if (count >= nstats) { | |
717 | nstats *= 2; | |
718 | stats = xrealloc(stats, nstats * sizeof(Stat)); | |
719 | } | |
720 | /* XXX OVERFLOW ? */ | |
88690211 | 721 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
722 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 723 | if (lstat(pathname, &st) < 0) |
724 | continue; | |
b5c334cc | 725 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 726 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 727 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 728 | count++; |
729 | /* send up to 100 entries in one message */ | |
b5c334cc | 730 | /* XXX check packet size instead */ |
b5e300c2 | 731 | if (count == 100) |
732 | break; | |
733 | } | |
f546c780 | 734 | if (count > 0) { |
735 | send_names(id, count, stats); | |
184eed6a | 736 | for (i = 0; i < count; i++) { |
f546c780 | 737 | xfree(stats[i].name); |
738 | xfree(stats[i].long_name); | |
739 | } | |
740 | } else { | |
741 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 742 | } |
743 | xfree(stats); | |
744 | } | |
745 | } | |
746 | ||
396c147e | 747 | static void |
b5e300c2 | 748 | process_remove(void) |
749 | { | |
750 | char *name; | |
751 | u_int32_t id; | |
f546c780 | 752 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 753 | int ret; |
754 | ||
755 | id = get_int(); | |
756 | name = get_string(NULL); | |
9906a836 | 757 | TRACE("remove id %u name %s", id, name); |
67b0facb | 758 | ret = unlink(name); |
f546c780 | 759 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 760 | send_status(id, status); |
761 | xfree(name); | |
762 | } | |
763 | ||
396c147e | 764 | static void |
b5e300c2 | 765 | process_mkdir(void) |
766 | { | |
767 | Attrib *a; | |
768 | u_int32_t id; | |
769 | char *name; | |
f546c780 | 770 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 771 | |
772 | id = get_int(); | |
773 | name = get_string(NULL); | |
774 | a = get_attrib(); | |
f546c780 | 775 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
776 | a->perm & 0777 : 0777; | |
9906a836 | 777 | TRACE("mkdir id %u name %s mode 0%o", id, name, mode); |
b5e300c2 | 778 | ret = mkdir(name, mode); |
f546c780 | 779 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 780 | send_status(id, status); |
781 | xfree(name); | |
782 | } | |
783 | ||
396c147e | 784 | static void |
b5e300c2 | 785 | process_rmdir(void) |
786 | { | |
787 | u_int32_t id; | |
788 | char *name; | |
789 | int ret, status; | |
790 | ||
791 | id = get_int(); | |
792 | name = get_string(NULL); | |
9906a836 | 793 | TRACE("rmdir id %u name %s", id, name); |
b5e300c2 | 794 | ret = rmdir(name); |
f546c780 | 795 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 796 | send_status(id, status); |
797 | xfree(name); | |
798 | } | |
799 | ||
396c147e | 800 | static void |
b5e300c2 | 801 | process_realpath(void) |
802 | { | |
803 | char resolvedname[MAXPATHLEN]; | |
804 | u_int32_t id; | |
805 | char *path; | |
806 | ||
807 | id = get_int(); | |
808 | path = get_string(NULL); | |
6b523bae | 809 | if (path[0] == '\0') { |
810 | xfree(path); | |
811 | path = xstrdup("."); | |
812 | } | |
9906a836 | 813 | TRACE("realpath id %u path %s", id, path); |
b5e300c2 | 814 | if (realpath(path, resolvedname) == NULL) { |
815 | send_status(id, errno_to_portable(errno)); | |
816 | } else { | |
817 | Stat s; | |
818 | attrib_clear(&s.attrib); | |
819 | s.name = s.long_name = resolvedname; | |
820 | send_names(id, 1, &s); | |
821 | } | |
822 | xfree(path); | |
823 | } | |
824 | ||
396c147e | 825 | static void |
b5e300c2 | 826 | process_rename(void) |
827 | { | |
828 | u_int32_t id; | |
829 | char *oldpath, *newpath; | |
f2f28f1f | 830 | int status; |
fd77a40f | 831 | struct stat sb; |
b5e300c2 | 832 | |
833 | id = get_int(); | |
834 | oldpath = get_string(NULL); | |
835 | newpath = get_string(NULL); | |
9906a836 | 836 | TRACE("rename id %u old %s new %s", id, oldpath, newpath); |
fd77a40f | 837 | status = SSH2_FX_FAILURE; |
838 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 839 | status = errno_to_portable(errno); |
fd77a40f | 840 | else if (S_ISREG(sb.st_mode)) { |
841 | /* Race-free rename of regular files */ | |
842 | if (link(oldpath, newpath) == -1) | |
843 | status = errno_to_portable(errno); | |
844 | else if (unlink(oldpath) == -1) { | |
845 | status = errno_to_portable(errno); | |
846 | /* clean spare link */ | |
847 | unlink(newpath); | |
848 | } else | |
849 | status = SSH2_FX_OK; | |
850 | } else if (stat(newpath, &sb) == -1) { | |
851 | if (rename(oldpath, newpath) == -1) | |
852 | status = errno_to_portable(errno); | |
853 | else | |
854 | status = SSH2_FX_OK; | |
855 | } | |
b5e300c2 | 856 | send_status(id, status); |
857 | xfree(oldpath); | |
858 | xfree(newpath); | |
859 | } | |
860 | ||
396c147e | 861 | static void |
3a7fe5ba | 862 | process_readlink(void) |
863 | { | |
864 | u_int32_t id; | |
362df52e | 865 | int len; |
3a7fe5ba | 866 | char link[MAXPATHLEN]; |
867 | char *path; | |
868 | ||
869 | id = get_int(); | |
870 | path = get_string(NULL); | |
9906a836 | 871 | TRACE("readlink id %u path %s", id, path); |
362df52e | 872 | if ((len = readlink(path, link, sizeof(link) - 1)) == -1) |
3a7fe5ba | 873 | send_status(id, errno_to_portable(errno)); |
874 | else { | |
875 | Stat s; | |
184eed6a | 876 | |
362df52e | 877 | link[len] = '\0'; |
3a7fe5ba | 878 | attrib_clear(&s.attrib); |
879 | s.name = s.long_name = link; | |
880 | send_names(id, 1, &s); | |
881 | } | |
882 | xfree(path); | |
883 | } | |
884 | ||
396c147e | 885 | static void |
3a7fe5ba | 886 | process_symlink(void) |
887 | { | |
888 | u_int32_t id; | |
3a7fe5ba | 889 | char *oldpath, *newpath; |
f2f28f1f | 890 | int ret, status; |
3a7fe5ba | 891 | |
892 | id = get_int(); | |
893 | oldpath = get_string(NULL); | |
894 | newpath = get_string(NULL); | |
9906a836 | 895 | TRACE("symlink id %u old %s new %s", id, oldpath, newpath); |
f2f28f1f | 896 | /* this will fail if 'newpath' exists */ |
897 | ret = symlink(oldpath, newpath); | |
898 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 899 | send_status(id, status); |
900 | xfree(oldpath); | |
901 | xfree(newpath); | |
902 | } | |
903 | ||
396c147e | 904 | static void |
f546c780 | 905 | process_extended(void) |
906 | { | |
907 | u_int32_t id; | |
908 | char *request; | |
909 | ||
910 | id = get_int(); | |
911 | request = get_string(NULL); | |
912 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
913 | xfree(request); | |
914 | } | |
b5e300c2 | 915 | |
916 | /* stolen from ssh-agent */ | |
917 | ||
396c147e | 918 | static void |
b5e300c2 | 919 | process(void) |
920 | { | |
1e3b8b07 | 921 | u_int msg_len; |
9b4ac641 | 922 | u_int buf_len; |
923 | u_int consumed; | |
1e3b8b07 | 924 | u_int type; |
925 | u_char *cp; | |
b5e300c2 | 926 | |
9b4ac641 | 927 | buf_len = buffer_len(&iqueue); |
928 | if (buf_len < 5) | |
b5e300c2 | 929 | return; /* Incomplete message. */ |
20905a8e | 930 | cp = buffer_ptr(&iqueue); |
b5e300c2 | 931 | msg_len = GET_32BIT(cp); |
932 | if (msg_len > 256 * 1024) { | |
933 | error("bad message "); | |
934 | exit(11); | |
935 | } | |
9b4ac641 | 936 | if (buf_len < msg_len + 4) |
b5e300c2 | 937 | return; |
938 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 939 | buf_len -= 4; |
b5e300c2 | 940 | type = buffer_get_char(&iqueue); |
941 | switch (type) { | |
f546c780 | 942 | case SSH2_FXP_INIT: |
b5e300c2 | 943 | process_init(); |
944 | break; | |
f546c780 | 945 | case SSH2_FXP_OPEN: |
b5e300c2 | 946 | process_open(); |
947 | break; | |
f546c780 | 948 | case SSH2_FXP_CLOSE: |
b5e300c2 | 949 | process_close(); |
950 | break; | |
f546c780 | 951 | case SSH2_FXP_READ: |
b5e300c2 | 952 | process_read(); |
953 | break; | |
f546c780 | 954 | case SSH2_FXP_WRITE: |
b5e300c2 | 955 | process_write(); |
956 | break; | |
f546c780 | 957 | case SSH2_FXP_LSTAT: |
b5e300c2 | 958 | process_lstat(); |
959 | break; | |
f546c780 | 960 | case SSH2_FXP_FSTAT: |
b5e300c2 | 961 | process_fstat(); |
962 | break; | |
f546c780 | 963 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 964 | process_setstat(); |
965 | break; | |
f546c780 | 966 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 967 | process_fsetstat(); |
968 | break; | |
f546c780 | 969 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 970 | process_opendir(); |
971 | break; | |
f546c780 | 972 | case SSH2_FXP_READDIR: |
b5e300c2 | 973 | process_readdir(); |
974 | break; | |
f546c780 | 975 | case SSH2_FXP_REMOVE: |
b5e300c2 | 976 | process_remove(); |
977 | break; | |
f546c780 | 978 | case SSH2_FXP_MKDIR: |
b5e300c2 | 979 | process_mkdir(); |
980 | break; | |
f546c780 | 981 | case SSH2_FXP_RMDIR: |
b5e300c2 | 982 | process_rmdir(); |
983 | break; | |
f546c780 | 984 | case SSH2_FXP_REALPATH: |
b5e300c2 | 985 | process_realpath(); |
986 | break; | |
f546c780 | 987 | case SSH2_FXP_STAT: |
b5e300c2 | 988 | process_stat(); |
989 | break; | |
f546c780 | 990 | case SSH2_FXP_RENAME: |
b5e300c2 | 991 | process_rename(); |
992 | break; | |
3a7fe5ba | 993 | case SSH2_FXP_READLINK: |
994 | process_readlink(); | |
995 | break; | |
996 | case SSH2_FXP_SYMLINK: | |
997 | process_symlink(); | |
998 | break; | |
f546c780 | 999 | case SSH2_FXP_EXTENDED: |
1000 | process_extended(); | |
1001 | break; | |
b5e300c2 | 1002 | default: |
1003 | error("Unknown message %d", type); | |
1004 | break; | |
1005 | } | |
9b4ac641 | 1006 | /* discard the remaining bytes from the current packet */ |
1007 | if (buf_len < buffer_len(&iqueue)) | |
1008 | fatal("iqueue grows"); | |
1009 | consumed = buf_len - buffer_len(&iqueue); | |
1010 | if (msg_len < consumed) | |
1011 | fatal("msg_len %d < consumed %d", msg_len, consumed); | |
1012 | if (msg_len > consumed) | |
1013 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1014 | } |
1015 | ||
1016 | int | |
1017 | main(int ac, char **av) | |
1018 | { | |
c8d75031 | 1019 | fd_set *rset, *wset; |
b5e300c2 | 1020 | int in, out, max; |
c8d75031 | 1021 | ssize_t len, olen, set_size; |
b5e300c2 | 1022 | |
61b3a2bc | 1023 | /* XXX should use getopt */ |
1024 | ||
fda04d7d | 1025 | __progname = ssh_get_progname(av[0]); |
b5e300c2 | 1026 | handle_init(); |
1027 | ||
b5c334cc | 1028 | #ifdef DEBUG_SFTP_SERVER |
2b87da3b | 1029 | log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0); |
b5c334cc | 1030 | #endif |
f546c780 | 1031 | |
b5e300c2 | 1032 | in = dup(STDIN_FILENO); |
1033 | out = dup(STDOUT_FILENO); | |
1034 | ||
fe56c12b | 1035 | #ifdef HAVE_CYGWIN |
1036 | setmode(in, O_BINARY); | |
1037 | setmode(out, O_BINARY); | |
1038 | #endif | |
1039 | ||
b5e300c2 | 1040 | max = 0; |
1041 | if (in > max) | |
1042 | max = in; | |
1043 | if (out > max) | |
1044 | max = out; | |
1045 | ||
1046 | buffer_init(&iqueue); | |
1047 | buffer_init(&oqueue); | |
1048 | ||
c8d75031 | 1049 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1050 | rset = (fd_set *)xmalloc(set_size); | |
1051 | wset = (fd_set *)xmalloc(set_size); | |
1052 | ||
b5e300c2 | 1053 | for (;;) { |
c8d75031 | 1054 | memset(rset, 0, set_size); |
1055 | memset(wset, 0, set_size); | |
b5e300c2 | 1056 | |
c8d75031 | 1057 | FD_SET(in, rset); |
b5e300c2 | 1058 | olen = buffer_len(&oqueue); |
1059 | if (olen > 0) | |
c8d75031 | 1060 | FD_SET(out, wset); |
b5e300c2 | 1061 | |
c8d75031 | 1062 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1063 | if (errno == EINTR) |
1064 | continue; | |
1065 | exit(2); | |
1066 | } | |
1067 | ||
1068 | /* copy stdin to iqueue */ | |
c8d75031 | 1069 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1070 | char buf[4*4096]; |
1071 | len = read(in, buf, sizeof buf); | |
1072 | if (len == 0) { | |
1073 | debug("read eof"); | |
1074 | exit(0); | |
1075 | } else if (len < 0) { | |
1076 | error("read error"); | |
1077 | exit(1); | |
1078 | } else { | |
1079 | buffer_append(&iqueue, buf, len); | |
1080 | } | |
1081 | } | |
1082 | /* send oqueue to stdout */ | |
c8d75031 | 1083 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1084 | len = write(out, buffer_ptr(&oqueue), olen); |
1085 | if (len < 0) { | |
1086 | error("write error"); | |
1087 | exit(1); | |
1088 | } else { | |
1089 | buffer_consume(&oqueue, len); | |
1090 | } | |
1091 | } | |
1092 | /* process requests from client */ | |
1093 | process(); | |
1094 | } | |
1095 | } |