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3c0ef626 | 1 | /* |
cdd66111 | 2 | * Copyright (c) 2000-2004 Markus Friedl. All rights reserved. |
3c0ef626 | 3 | * |
cdd66111 | 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. | |
3c0ef626 | 7 | * |
cdd66111 | 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. | |
3c0ef626 | 15 | */ |
16 | #include "includes.h" | |
cdd66111 | 17 | RCSID("$OpenBSD: sftp-server.c,v 1.45 2004/02/19 21:15:04 markus Exp $"); |
3c0ef626 | 18 | |
19 | #include "buffer.h" | |
20 | #include "bufaux.h" | |
21 | #include "getput.h" | |
22 | #include "log.h" | |
23 | #include "xmalloc.h" | |
24 | ||
25 | #include "sftp.h" | |
26 | #include "sftp-common.h" | |
27 | ||
28 | /* helper */ | |
29 | #define get_int64() buffer_get_int64(&iqueue); | |
30 | #define get_int() buffer_get_int(&iqueue); | |
31 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
32 | #define TRACE debug | |
33 | ||
34 | #ifdef HAVE___PROGNAME | |
35 | extern char *__progname; | |
36 | #else | |
37 | char *__progname; | |
38 | #endif | |
39 | ||
40 | /* input and output queue */ | |
41 | Buffer iqueue; | |
42 | Buffer oqueue; | |
43 | ||
44 | /* Version of client */ | |
45 | int version; | |
46 | ||
0fff78ff | 47 | /* portable attributes, etc. */ |
3c0ef626 | 48 | |
49 | typedef struct Stat Stat; | |
50 | ||
51 | struct Stat { | |
52 | char *name; | |
53 | char *long_name; | |
54 | Attrib attrib; | |
55 | }; | |
56 | ||
57 | static int | |
58 | errno_to_portable(int unixerrno) | |
59 | { | |
60 | int ret = 0; | |
61 | ||
62 | switch (unixerrno) { | |
63 | case 0: | |
64 | ret = SSH2_FX_OK; | |
65 | break; | |
66 | case ENOENT: | |
67 | case ENOTDIR: | |
68 | case EBADF: | |
69 | case ELOOP: | |
70 | ret = SSH2_FX_NO_SUCH_FILE; | |
71 | break; | |
72 | case EPERM: | |
73 | case EACCES: | |
74 | case EFAULT: | |
75 | ret = SSH2_FX_PERMISSION_DENIED; | |
76 | break; | |
77 | case ENAMETOOLONG: | |
78 | case EINVAL: | |
79 | ret = SSH2_FX_BAD_MESSAGE; | |
80 | break; | |
81 | default: | |
82 | ret = SSH2_FX_FAILURE; | |
83 | break; | |
84 | } | |
85 | return ret; | |
86 | } | |
87 | ||
88 | static int | |
89 | flags_from_portable(int pflags) | |
90 | { | |
91 | int flags = 0; | |
92 | ||
93 | if ((pflags & SSH2_FXF_READ) && | |
94 | (pflags & SSH2_FXF_WRITE)) { | |
95 | flags = O_RDWR; | |
96 | } else if (pflags & SSH2_FXF_READ) { | |
97 | flags = O_RDONLY; | |
98 | } else if (pflags & SSH2_FXF_WRITE) { | |
99 | flags = O_WRONLY; | |
100 | } | |
101 | if (pflags & SSH2_FXF_CREAT) | |
102 | flags |= O_CREAT; | |
103 | if (pflags & SSH2_FXF_TRUNC) | |
104 | flags |= O_TRUNC; | |
105 | if (pflags & SSH2_FXF_EXCL) | |
106 | flags |= O_EXCL; | |
107 | return flags; | |
108 | } | |
109 | ||
110 | static Attrib * | |
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 | }; | |
125 | ||
126 | enum { | |
127 | HANDLE_UNUSED, | |
128 | HANDLE_DIR, | |
129 | HANDLE_FILE | |
130 | }; | |
131 | ||
132 | Handle handles[100]; | |
133 | ||
134 | static void | |
135 | handle_init(void) | |
136 | { | |
137 | int i; | |
138 | ||
e9a17296 | 139 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
3c0ef626 | 140 | handles[i].use = HANDLE_UNUSED; |
141 | } | |
142 | ||
143 | static int | |
cdd66111 | 144 | handle_new(int use, const char *name, int fd, DIR *dirp) |
3c0ef626 | 145 | { |
146 | int i; | |
147 | ||
e9a17296 | 148 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
3c0ef626 | 149 | if (handles[i].use == HANDLE_UNUSED) { |
150 | handles[i].use = use; | |
151 | handles[i].dirp = dirp; | |
152 | handles[i].fd = fd; | |
6a9b3198 | 153 | handles[i].name = xstrdup(name); |
3c0ef626 | 154 | return i; |
155 | } | |
156 | } | |
157 | return -1; | |
158 | } | |
159 | ||
160 | static int | |
161 | handle_is_ok(int i, int type) | |
162 | { | |
163 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && | |
164 | handles[i].use == type; | |
165 | } | |
166 | ||
167 | static int | |
168 | handle_to_string(int handle, char **stringp, int *hlenp) | |
169 | { | |
170 | if (stringp == NULL || hlenp == NULL) | |
171 | return -1; | |
172 | *stringp = xmalloc(sizeof(int32_t)); | |
173 | PUT_32BIT(*stringp, handle); | |
174 | *hlenp = sizeof(int32_t); | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static int | |
cdd66111 | 179 | handle_from_string(const char *handle, u_int hlen) |
3c0ef626 | 180 | { |
181 | int val; | |
182 | ||
183 | if (hlen != sizeof(int32_t)) | |
184 | return -1; | |
185 | val = GET_32BIT(handle); | |
186 | if (handle_is_ok(val, HANDLE_FILE) || | |
187 | handle_is_ok(val, HANDLE_DIR)) | |
188 | return val; | |
189 | return -1; | |
190 | } | |
191 | ||
192 | static char * | |
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 | ||
201 | static DIR * | |
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 | ||
209 | static int | |
210 | handle_to_fd(int handle) | |
211 | { | |
212 | if (handle_is_ok(handle, HANDLE_FILE)) | |
213 | return handles[handle].fd; | |
214 | return -1; | |
215 | } | |
216 | ||
217 | static int | |
218 | handle_close(int handle) | |
219 | { | |
220 | int ret = -1; | |
221 | ||
222 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
223 | ret = close(handles[handle].fd); | |
224 | handles[handle].use = HANDLE_UNUSED; | |
6a9b3198 | 225 | xfree(handles[handle].name); |
3c0ef626 | 226 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
227 | ret = closedir(handles[handle].dirp); | |
228 | handles[handle].use = HANDLE_UNUSED; | |
6a9b3198 | 229 | xfree(handles[handle].name); |
3c0ef626 | 230 | } else { |
231 | errno = ENOENT; | |
232 | } | |
233 | return ret; | |
234 | } | |
235 | ||
236 | static int | |
237 | get_handle(void) | |
238 | { | |
239 | char *handle; | |
240 | int val = -1; | |
241 | u_int hlen; | |
242 | ||
243 | handle = get_string(&hlen); | |
244 | if (hlen < 256) | |
245 | val = handle_from_string(handle, hlen); | |
246 | xfree(handle); | |
247 | return val; | |
248 | } | |
249 | ||
250 | /* send replies */ | |
251 | ||
252 | static void | |
253 | send_msg(Buffer *m) | |
254 | { | |
255 | int mlen = buffer_len(m); | |
256 | ||
257 | buffer_put_int(&oqueue, mlen); | |
258 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
259 | buffer_consume(m, mlen); | |
260 | } | |
261 | ||
262 | static void | |
263 | send_status(u_int32_t id, u_int32_t error) | |
264 | { | |
265 | Buffer msg; | |
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 | }; | |
278 | ||
680cee3b | 279 | TRACE("sent status id %u error %u", id, error); |
3c0ef626 | 280 | buffer_init(&msg); |
281 | buffer_put_char(&msg, SSH2_FXP_STATUS); | |
282 | buffer_put_int(&msg, id); | |
283 | buffer_put_int(&msg, error); | |
284 | if (version >= 3) { | |
285 | buffer_put_cstring(&msg, | |
286 | status_messages[MIN(error,SSH2_FX_MAX)]); | |
287 | buffer_put_cstring(&msg, ""); | |
288 | } | |
289 | send_msg(&msg); | |
290 | buffer_free(&msg); | |
291 | } | |
292 | static void | |
cdd66111 | 293 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
3c0ef626 | 294 | { |
295 | Buffer msg; | |
296 | ||
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 | ||
305 | static void | |
cdd66111 | 306 | send_data(u_int32_t id, const char *data, int dlen) |
3c0ef626 | 307 | { |
680cee3b | 308 | TRACE("sent data id %u len %d", id, dlen); |
3c0ef626 | 309 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
310 | } | |
311 | ||
312 | static void | |
313 | send_handle(u_int32_t id, int handle) | |
314 | { | |
315 | char *string; | |
316 | int hlen; | |
317 | ||
318 | handle_to_string(handle, &string, &hlen); | |
680cee3b | 319 | TRACE("sent handle id %u handle %d", id, handle); |
3c0ef626 | 320 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
321 | xfree(string); | |
322 | } | |
323 | ||
324 | static void | |
cdd66111 | 325 | send_names(u_int32_t id, int count, const Stat *stats) |
3c0ef626 | 326 | { |
327 | Buffer msg; | |
328 | int i; | |
329 | ||
330 | buffer_init(&msg); | |
331 | buffer_put_char(&msg, SSH2_FXP_NAME); | |
332 | buffer_put_int(&msg, id); | |
333 | buffer_put_int(&msg, count); | |
680cee3b | 334 | TRACE("sent names id %u count %d", id, count); |
3c0ef626 | 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 | ||
344 | static void | |
cdd66111 | 345 | send_attrib(u_int32_t id, const Attrib *a) |
3c0ef626 | 346 | { |
347 | Buffer msg; | |
348 | ||
680cee3b | 349 | TRACE("sent attrib id %u have 0x%x", id, a->flags); |
3c0ef626 | 350 | buffer_init(&msg); |
351 | buffer_put_char(&msg, SSH2_FXP_ATTRS); | |
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 | ||
360 | static void | |
361 | process_init(void) | |
362 | { | |
363 | Buffer msg; | |
364 | ||
f5799ae1 | 365 | version = get_int(); |
3c0ef626 | 366 | TRACE("client version %d", version); |
367 | buffer_init(&msg); | |
368 | buffer_put_char(&msg, SSH2_FXP_VERSION); | |
369 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
370 | send_msg(&msg); | |
371 | buffer_free(&msg); | |
372 | } | |
373 | ||
374 | static void | |
375 | process_open(void) | |
376 | { | |
377 | u_int32_t id, pflags; | |
378 | Attrib *a; | |
379 | char *name; | |
380 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; | |
381 | ||
382 | id = get_int(); | |
383 | name = get_string(NULL); | |
384 | pflags = get_int(); /* portable flags */ | |
385 | a = get_attrib(); | |
386 | flags = flags_from_portable(pflags); | |
387 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; | |
680cee3b | 388 | TRACE("open id %u name %s flags %d mode 0%o", id, name, pflags, mode); |
3c0ef626 | 389 | fd = open(name, flags, mode); |
390 | if (fd < 0) { | |
391 | status = errno_to_portable(errno); | |
392 | } else { | |
6a9b3198 | 393 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
3c0ef626 | 394 | if (handle < 0) { |
395 | close(fd); | |
396 | } else { | |
397 | send_handle(id, handle); | |
398 | status = SSH2_FX_OK; | |
399 | } | |
400 | } | |
401 | if (status != SSH2_FX_OK) | |
402 | send_status(id, status); | |
403 | xfree(name); | |
404 | } | |
405 | ||
406 | static void | |
407 | process_close(void) | |
408 | { | |
409 | u_int32_t id; | |
410 | int handle, ret, status = SSH2_FX_FAILURE; | |
411 | ||
412 | id = get_int(); | |
413 | handle = get_handle(); | |
680cee3b | 414 | TRACE("close id %u handle %d", id, handle); |
3c0ef626 | 415 | ret = handle_close(handle); |
416 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
417 | send_status(id, status); | |
418 | } | |
419 | ||
420 | static void | |
421 | process_read(void) | |
422 | { | |
423 | char buf[64*1024]; | |
424 | u_int32_t id, len; | |
425 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
426 | u_int64_t off; | |
427 | ||
428 | id = get_int(); | |
429 | handle = get_handle(); | |
430 | off = get_int64(); | |
431 | len = get_int(); | |
432 | ||
680cee3b | 433 | TRACE("read id %u handle %d off %llu len %d", id, handle, |
3c0ef626 | 434 | (u_int64_t)off, len); |
435 | if (len > sizeof buf) { | |
436 | len = sizeof buf; | |
0fff78ff | 437 | logit("read change len %d", len); |
3c0ef626 | 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) { | |
449 | status = SSH2_FX_EOF; | |
450 | } else { | |
451 | send_data(id, buf, ret); | |
452 | status = SSH2_FX_OK; | |
453 | } | |
454 | } | |
455 | } | |
456 | if (status != SSH2_FX_OK) | |
457 | send_status(id, status); | |
458 | } | |
459 | ||
460 | static void | |
461 | process_write(void) | |
462 | { | |
463 | u_int32_t id; | |
464 | u_int64_t off; | |
465 | u_int len; | |
466 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
467 | char *data; | |
468 | ||
469 | id = get_int(); | |
470 | handle = get_handle(); | |
471 | off = get_int64(); | |
472 | data = get_string(&len); | |
473 | ||
680cee3b | 474 | TRACE("write id %u handle %d off %llu len %d", id, handle, |
3c0ef626 | 475 | (u_int64_t)off, len); |
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) { | |
488 | status = SSH2_FX_OK; | |
489 | } else { | |
0fff78ff | 490 | logit("nothing at all written"); |
3c0ef626 | 491 | } |
492 | } | |
493 | } | |
494 | send_status(id, status); | |
495 | xfree(data); | |
496 | } | |
497 | ||
498 | static void | |
499 | process_do_stat(int do_lstat) | |
500 | { | |
501 | Attrib a; | |
502 | struct stat st; | |
503 | u_int32_t id; | |
504 | char *name; | |
505 | int ret, status = SSH2_FX_FAILURE; | |
506 | ||
507 | id = get_int(); | |
508 | name = get_string(NULL); | |
680cee3b | 509 | TRACE("%sstat id %u name %s", do_lstat ? "l" : "", id, name); |
3c0ef626 | 510 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
511 | if (ret < 0) { | |
512 | status = errno_to_portable(errno); | |
513 | } else { | |
514 | stat_to_attrib(&st, &a); | |
515 | send_attrib(id, &a); | |
516 | status = SSH2_FX_OK; | |
517 | } | |
518 | if (status != SSH2_FX_OK) | |
519 | send_status(id, status); | |
520 | xfree(name); | |
521 | } | |
522 | ||
523 | static void | |
524 | process_stat(void) | |
525 | { | |
526 | process_do_stat(0); | |
527 | } | |
528 | ||
529 | static void | |
530 | process_lstat(void) | |
531 | { | |
532 | process_do_stat(1); | |
533 | } | |
534 | ||
535 | static void | |
536 | process_fstat(void) | |
537 | { | |
538 | Attrib a; | |
539 | struct stat st; | |
540 | u_int32_t id; | |
541 | int fd, ret, handle, status = SSH2_FX_FAILURE; | |
542 | ||
543 | id = get_int(); | |
544 | handle = get_handle(); | |
680cee3b | 545 | TRACE("fstat id %u handle %d", id, handle); |
3c0ef626 | 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 { | |
552 | stat_to_attrib(&st, &a); | |
553 | send_attrib(id, &a); | |
554 | status = SSH2_FX_OK; | |
555 | } | |
556 | } | |
557 | if (status != SSH2_FX_OK) | |
558 | send_status(id, status); | |
559 | } | |
560 | ||
561 | static struct timeval * | |
cdd66111 | 562 | attrib_to_tv(const Attrib *a) |
3c0ef626 | 563 | { |
564 | static struct timeval tv[2]; | |
565 | ||
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 | ||
573 | static void | |
574 | process_setstat(void) | |
575 | { | |
576 | Attrib *a; | |
577 | u_int32_t id; | |
578 | char *name; | |
680cee3b | 579 | int status = SSH2_FX_OK, ret; |
3c0ef626 | 580 | |
581 | id = get_int(); | |
582 | name = get_string(NULL); | |
583 | a = get_attrib(); | |
680cee3b | 584 | TRACE("setstat id %u name %s", id, name); |
e9a17296 | 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 | } | |
3c0ef626 | 590 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
591 | ret = chmod(name, a->perm & 0777); | |
592 | if (ret == -1) | |
593 | status = errno_to_portable(errno); | |
594 | } | |
595 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { | |
596 | ret = utimes(name, attrib_to_tv(a)); | |
597 | if (ret == -1) | |
598 | status = errno_to_portable(errno); | |
599 | } | |
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 | } | |
605 | send_status(id, status); | |
606 | xfree(name); | |
607 | } | |
608 | ||
609 | static void | |
610 | process_fsetstat(void) | |
611 | { | |
612 | Attrib *a; | |
613 | u_int32_t id; | |
614 | int handle, fd, ret; | |
615 | int status = SSH2_FX_OK; | |
616 | char *name; | |
617 | ||
618 | id = get_int(); | |
619 | handle = get_handle(); | |
620 | a = get_attrib(); | |
680cee3b | 621 | TRACE("fsetstat id %u handle %d", id, handle); |
3c0ef626 | 622 | fd = handle_to_fd(handle); |
623 | name = handle_to_name(handle); | |
624 | if (fd < 0 || name == NULL) { | |
625 | status = SSH2_FX_FAILURE; | |
626 | } else { | |
e9a17296 | 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 | } | |
3c0ef626 | 632 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
633 | #ifdef HAVE_FCHMOD | |
634 | ret = fchmod(fd, a->perm & 0777); | |
635 | #else | |
636 | ret = chmod(name, a->perm & 0777); | |
637 | #endif | |
638 | if (ret == -1) | |
639 | status = errno_to_portable(errno); | |
640 | } | |
641 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { | |
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 | } | |
650 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { | |
651 | #ifdef HAVE_FCHOWN | |
652 | ret = fchown(fd, a->uid, a->gid); | |
653 | #else | |
654 | ret = chown(name, a->uid, a->gid); | |
655 | #endif | |
656 | if (ret == -1) | |
657 | status = errno_to_portable(errno); | |
658 | } | |
659 | } | |
660 | send_status(id, status); | |
661 | } | |
662 | ||
663 | static void | |
664 | process_opendir(void) | |
665 | { | |
666 | DIR *dirp = NULL; | |
667 | char *path; | |
668 | int handle, status = SSH2_FX_FAILURE; | |
669 | u_int32_t id; | |
670 | ||
671 | id = get_int(); | |
672 | path = get_string(NULL); | |
680cee3b | 673 | TRACE("opendir id %u path %s", id, path); |
3c0ef626 | 674 | dirp = opendir(path); |
675 | if (dirp == NULL) { | |
676 | status = errno_to_portable(errno); | |
677 | } else { | |
6a9b3198 | 678 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
3c0ef626 | 679 | if (handle < 0) { |
680 | closedir(dirp); | |
681 | } else { | |
682 | send_handle(id, handle); | |
683 | status = SSH2_FX_OK; | |
684 | } | |
685 | ||
686 | } | |
687 | if (status != SSH2_FX_OK) | |
688 | send_status(id, status); | |
689 | xfree(path); | |
690 | } | |
691 | ||
3c0ef626 | 692 | static void |
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(); | |
680cee3b | 703 | TRACE("readdir id %u handle %d", id, handle); |
3c0ef626 | 704 | dirp = handle_to_dir(handle); |
705 | path = handle_to_name(handle); | |
706 | if (dirp == NULL || path == NULL) { | |
707 | send_status(id, SSH2_FX_FAILURE); | |
708 | } else { | |
709 | struct stat st; | |
710 | char pathname[1024]; | |
711 | Stat *stats; | |
712 | int nstats = 10, count = 0, i; | |
680cee3b | 713 | |
3c0ef626 | 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 ? */ | |
721 | snprintf(pathname, sizeof pathname, "%s%s%s", path, | |
722 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
723 | if (lstat(pathname, &st) < 0) | |
724 | continue; | |
725 | stat_to_attrib(&st, &(stats[count].attrib)); | |
726 | stats[count].name = xstrdup(dp->d_name); | |
41b2f314 | 727 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
3c0ef626 | 728 | count++; |
729 | /* send up to 100 entries in one message */ | |
730 | /* XXX check packet size instead */ | |
731 | if (count == 100) | |
732 | break; | |
733 | } | |
734 | if (count > 0) { | |
735 | send_names(id, count, stats); | |
e9a17296 | 736 | for (i = 0; i < count; i++) { |
3c0ef626 | 737 | xfree(stats[i].name); |
738 | xfree(stats[i].long_name); | |
739 | } | |
740 | } else { | |
741 | send_status(id, SSH2_FX_EOF); | |
742 | } | |
743 | xfree(stats); | |
744 | } | |
745 | } | |
746 | ||
747 | static void | |
748 | process_remove(void) | |
749 | { | |
750 | char *name; | |
751 | u_int32_t id; | |
752 | int status = SSH2_FX_FAILURE; | |
753 | int ret; | |
754 | ||
755 | id = get_int(); | |
756 | name = get_string(NULL); | |
680cee3b | 757 | TRACE("remove id %u name %s", id, name); |
3c0ef626 | 758 | ret = unlink(name); |
759 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
760 | send_status(id, status); | |
761 | xfree(name); | |
762 | } | |
763 | ||
764 | static void | |
765 | process_mkdir(void) | |
766 | { | |
767 | Attrib *a; | |
768 | u_int32_t id; | |
769 | char *name; | |
770 | int ret, mode, status = SSH2_FX_FAILURE; | |
771 | ||
772 | id = get_int(); | |
773 | name = get_string(NULL); | |
774 | a = get_attrib(); | |
775 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? | |
776 | a->perm & 0777 : 0777; | |
680cee3b | 777 | TRACE("mkdir id %u name %s mode 0%o", id, name, mode); |
3c0ef626 | 778 | ret = mkdir(name, mode); |
779 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
780 | send_status(id, status); | |
781 | xfree(name); | |
782 | } | |
783 | ||
784 | static void | |
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); | |
680cee3b | 793 | TRACE("rmdir id %u name %s", id, name); |
3c0ef626 | 794 | ret = rmdir(name); |
795 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
796 | send_status(id, status); | |
797 | xfree(name); | |
798 | } | |
799 | ||
800 | static void | |
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); | |
809 | if (path[0] == '\0') { | |
810 | xfree(path); | |
811 | path = xstrdup("."); | |
812 | } | |
680cee3b | 813 | TRACE("realpath id %u path %s", id, path); |
3c0ef626 | 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 | ||
825 | static void | |
826 | process_rename(void) | |
827 | { | |
828 | u_int32_t id; | |
3c0ef626 | 829 | char *oldpath, *newpath; |
6a9b3198 | 830 | int status; |
831 | struct stat sb; | |
3c0ef626 | 832 | |
833 | id = get_int(); | |
834 | oldpath = get_string(NULL); | |
835 | newpath = get_string(NULL); | |
680cee3b | 836 | TRACE("rename id %u old %s new %s", id, oldpath, newpath); |
6a9b3198 | 837 | status = SSH2_FX_FAILURE; |
838 | if (lstat(oldpath, &sb) == -1) | |
839 | status = errno_to_portable(errno); | |
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; | |
3c0ef626 | 855 | } |
856 | send_status(id, status); | |
857 | xfree(oldpath); | |
858 | xfree(newpath); | |
859 | } | |
860 | ||
861 | static void | |
862 | process_readlink(void) | |
863 | { | |
864 | u_int32_t id; | |
865 | int len; | |
866 | char link[MAXPATHLEN]; | |
867 | char *path; | |
868 | ||
869 | id = get_int(); | |
870 | path = get_string(NULL); | |
680cee3b | 871 | TRACE("readlink id %u path %s", id, path); |
3c0ef626 | 872 | if ((len = readlink(path, link, sizeof(link) - 1)) == -1) |
873 | send_status(id, errno_to_portable(errno)); | |
874 | else { | |
875 | Stat s; | |
e9a17296 | 876 | |
3c0ef626 | 877 | link[len] = '\0'; |
878 | attrib_clear(&s.attrib); | |
879 | s.name = s.long_name = link; | |
880 | send_names(id, 1, &s); | |
881 | } | |
882 | xfree(path); | |
883 | } | |
884 | ||
885 | static void | |
886 | process_symlink(void) | |
887 | { | |
888 | u_int32_t id; | |
3c0ef626 | 889 | char *oldpath, *newpath; |
6a9b3198 | 890 | int ret, status; |
3c0ef626 | 891 | |
892 | id = get_int(); | |
893 | oldpath = get_string(NULL); | |
894 | newpath = get_string(NULL); | |
680cee3b | 895 | TRACE("symlink id %u old %s new %s", id, oldpath, newpath); |
6a9b3198 | 896 | /* this will fail if 'newpath' exists */ |
897 | ret = symlink(oldpath, newpath); | |
898 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3c0ef626 | 899 | send_status(id, status); |
900 | xfree(oldpath); | |
901 | xfree(newpath); | |
902 | } | |
903 | ||
904 | static void | |
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 | } | |
915 | ||
916 | /* stolen from ssh-agent */ | |
917 | ||
918 | static void | |
919 | process(void) | |
920 | { | |
921 | u_int msg_len; | |
f5799ae1 | 922 | u_int buf_len; |
923 | u_int consumed; | |
3c0ef626 | 924 | u_int type; |
925 | u_char *cp; | |
926 | ||
f5799ae1 | 927 | buf_len = buffer_len(&iqueue); |
928 | if (buf_len < 5) | |
3c0ef626 | 929 | return; /* Incomplete message. */ |
e9a17296 | 930 | cp = buffer_ptr(&iqueue); |
3c0ef626 | 931 | msg_len = GET_32BIT(cp); |
932 | if (msg_len > 256 * 1024) { | |
933 | error("bad message "); | |
934 | exit(11); | |
935 | } | |
f5799ae1 | 936 | if (buf_len < msg_len + 4) |
3c0ef626 | 937 | return; |
938 | buffer_consume(&iqueue, 4); | |
f5799ae1 | 939 | buf_len -= 4; |
3c0ef626 | 940 | type = buffer_get_char(&iqueue); |
941 | switch (type) { | |
942 | case SSH2_FXP_INIT: | |
943 | process_init(); | |
944 | break; | |
945 | case SSH2_FXP_OPEN: | |
946 | process_open(); | |
947 | break; | |
948 | case SSH2_FXP_CLOSE: | |
949 | process_close(); | |
950 | break; | |
951 | case SSH2_FXP_READ: | |
952 | process_read(); | |
953 | break; | |
954 | case SSH2_FXP_WRITE: | |
955 | process_write(); | |
956 | break; | |
957 | case SSH2_FXP_LSTAT: | |
958 | process_lstat(); | |
959 | break; | |
960 | case SSH2_FXP_FSTAT: | |
961 | process_fstat(); | |
962 | break; | |
963 | case SSH2_FXP_SETSTAT: | |
964 | process_setstat(); | |
965 | break; | |
966 | case SSH2_FXP_FSETSTAT: | |
967 | process_fsetstat(); | |
968 | break; | |
969 | case SSH2_FXP_OPENDIR: | |
970 | process_opendir(); | |
971 | break; | |
972 | case SSH2_FXP_READDIR: | |
973 | process_readdir(); | |
974 | break; | |
975 | case SSH2_FXP_REMOVE: | |
976 | process_remove(); | |
977 | break; | |
978 | case SSH2_FXP_MKDIR: | |
979 | process_mkdir(); | |
980 | break; | |
981 | case SSH2_FXP_RMDIR: | |
982 | process_rmdir(); | |
983 | break; | |
984 | case SSH2_FXP_REALPATH: | |
985 | process_realpath(); | |
986 | break; | |
987 | case SSH2_FXP_STAT: | |
988 | process_stat(); | |
989 | break; | |
990 | case SSH2_FXP_RENAME: | |
991 | process_rename(); | |
992 | break; | |
993 | case SSH2_FXP_READLINK: | |
994 | process_readlink(); | |
995 | break; | |
996 | case SSH2_FXP_SYMLINK: | |
997 | process_symlink(); | |
998 | break; | |
999 | case SSH2_FXP_EXTENDED: | |
1000 | process_extended(); | |
1001 | break; | |
1002 | default: | |
1003 | error("Unknown message %d", type); | |
1004 | break; | |
1005 | } | |
f5799ae1 | 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); | |
3c0ef626 | 1014 | } |
1015 | ||
1016 | int | |
1017 | main(int ac, char **av) | |
1018 | { | |
1019 | fd_set *rset, *wset; | |
1020 | int in, out, max; | |
1021 | ssize_t len, olen, set_size; | |
1022 | ||
1023 | /* XXX should use getopt */ | |
1024 | ||
0fff78ff | 1025 | __progname = ssh_get_progname(av[0]); |
3c0ef626 | 1026 | handle_init(); |
1027 | ||
1028 | #ifdef DEBUG_SFTP_SERVER | |
1029 | log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0); | |
1030 | #endif | |
1031 | ||
1032 | in = dup(STDIN_FILENO); | |
1033 | out = dup(STDOUT_FILENO); | |
1034 | ||
1035 | #ifdef HAVE_CYGWIN | |
1036 | setmode(in, O_BINARY); | |
1037 | setmode(out, O_BINARY); | |
1038 | #endif | |
1039 | ||
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 | ||
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 | ||
1053 | for (;;) { | |
1054 | memset(rset, 0, set_size); | |
1055 | memset(wset, 0, set_size); | |
1056 | ||
1057 | FD_SET(in, rset); | |
1058 | olen = buffer_len(&oqueue); | |
1059 | if (olen > 0) | |
1060 | FD_SET(out, wset); | |
1061 | ||
1062 | if (select(max+1, rset, wset, NULL, NULL) < 0) { | |
1063 | if (errno == EINTR) | |
1064 | continue; | |
1065 | exit(2); | |
1066 | } | |
1067 | ||
1068 | /* copy stdin to iqueue */ | |
1069 | if (FD_ISSET(in, rset)) { | |
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 */ | |
1083 | if (FD_ISSET(out, wset)) { | |
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 | } |