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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" | |
c9f39d2c | 17 | RCSID("$OpenBSD: sftp-server.c,v 1.47 2004/06/25 05:38:48 dtucker 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 | ||
3c0ef626 | 34 | extern char *__progname; |
3c0ef626 | 35 | |
36 | /* input and output queue */ | |
37 | Buffer iqueue; | |
38 | Buffer oqueue; | |
39 | ||
40 | /* Version of client */ | |
41 | int version; | |
42 | ||
0fff78ff | 43 | /* portable attributes, etc. */ |
3c0ef626 | 44 | |
45 | typedef struct Stat Stat; | |
46 | ||
47 | struct Stat { | |
48 | char *name; | |
49 | char *long_name; | |
50 | Attrib attrib; | |
51 | }; | |
52 | ||
53 | static int | |
54 | errno_to_portable(int unixerrno) | |
55 | { | |
56 | int ret = 0; | |
57 | ||
58 | switch (unixerrno) { | |
59 | case 0: | |
60 | ret = SSH2_FX_OK; | |
61 | break; | |
62 | case ENOENT: | |
63 | case ENOTDIR: | |
64 | case EBADF: | |
65 | case ELOOP: | |
66 | ret = SSH2_FX_NO_SUCH_FILE; | |
67 | break; | |
68 | case EPERM: | |
69 | case EACCES: | |
70 | case EFAULT: | |
71 | ret = SSH2_FX_PERMISSION_DENIED; | |
72 | break; | |
73 | case ENAMETOOLONG: | |
74 | case EINVAL: | |
75 | ret = SSH2_FX_BAD_MESSAGE; | |
76 | break; | |
77 | default: | |
78 | ret = SSH2_FX_FAILURE; | |
79 | break; | |
80 | } | |
81 | return ret; | |
82 | } | |
83 | ||
84 | static int | |
85 | flags_from_portable(int pflags) | |
86 | { | |
87 | int flags = 0; | |
88 | ||
89 | if ((pflags & SSH2_FXF_READ) && | |
90 | (pflags & SSH2_FXF_WRITE)) { | |
91 | flags = O_RDWR; | |
92 | } else if (pflags & SSH2_FXF_READ) { | |
93 | flags = O_RDONLY; | |
94 | } else if (pflags & SSH2_FXF_WRITE) { | |
95 | flags = O_WRONLY; | |
96 | } | |
97 | if (pflags & SSH2_FXF_CREAT) | |
98 | flags |= O_CREAT; | |
99 | if (pflags & SSH2_FXF_TRUNC) | |
100 | flags |= O_TRUNC; | |
101 | if (pflags & SSH2_FXF_EXCL) | |
102 | flags |= O_EXCL; | |
103 | return flags; | |
104 | } | |
105 | ||
106 | static Attrib * | |
107 | get_attrib(void) | |
108 | { | |
109 | return decode_attrib(&iqueue); | |
110 | } | |
111 | ||
112 | /* handle handles */ | |
113 | ||
114 | typedef struct Handle Handle; | |
115 | struct Handle { | |
116 | int use; | |
117 | DIR *dirp; | |
118 | int fd; | |
119 | char *name; | |
120 | }; | |
121 | ||
122 | enum { | |
123 | HANDLE_UNUSED, | |
124 | HANDLE_DIR, | |
125 | HANDLE_FILE | |
126 | }; | |
127 | ||
128 | Handle handles[100]; | |
129 | ||
130 | static void | |
131 | handle_init(void) | |
132 | { | |
133 | int i; | |
134 | ||
e9a17296 | 135 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
3c0ef626 | 136 | handles[i].use = HANDLE_UNUSED; |
137 | } | |
138 | ||
139 | static int | |
cdd66111 | 140 | handle_new(int use, const char *name, int fd, DIR *dirp) |
3c0ef626 | 141 | { |
142 | int i; | |
143 | ||
e9a17296 | 144 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
3c0ef626 | 145 | if (handles[i].use == HANDLE_UNUSED) { |
146 | handles[i].use = use; | |
147 | handles[i].dirp = dirp; | |
148 | handles[i].fd = fd; | |
6a9b3198 | 149 | handles[i].name = xstrdup(name); |
3c0ef626 | 150 | return i; |
151 | } | |
152 | } | |
153 | return -1; | |
154 | } | |
155 | ||
156 | static int | |
157 | handle_is_ok(int i, int type) | |
158 | { | |
159 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && | |
160 | handles[i].use == type; | |
161 | } | |
162 | ||
163 | static int | |
164 | handle_to_string(int handle, char **stringp, int *hlenp) | |
165 | { | |
166 | if (stringp == NULL || hlenp == NULL) | |
167 | return -1; | |
168 | *stringp = xmalloc(sizeof(int32_t)); | |
169 | PUT_32BIT(*stringp, handle); | |
170 | *hlenp = sizeof(int32_t); | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static int | |
cdd66111 | 175 | handle_from_string(const char *handle, u_int hlen) |
3c0ef626 | 176 | { |
177 | int val; | |
178 | ||
179 | if (hlen != sizeof(int32_t)) | |
180 | return -1; | |
181 | val = GET_32BIT(handle); | |
182 | if (handle_is_ok(val, HANDLE_FILE) || | |
183 | handle_is_ok(val, HANDLE_DIR)) | |
184 | return val; | |
185 | return -1; | |
186 | } | |
187 | ||
188 | static char * | |
189 | handle_to_name(int handle) | |
190 | { | |
191 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
192 | handle_is_ok(handle, HANDLE_FILE)) | |
193 | return handles[handle].name; | |
194 | return NULL; | |
195 | } | |
196 | ||
197 | static DIR * | |
198 | handle_to_dir(int handle) | |
199 | { | |
200 | if (handle_is_ok(handle, HANDLE_DIR)) | |
201 | return handles[handle].dirp; | |
202 | return NULL; | |
203 | } | |
204 | ||
205 | static int | |
206 | handle_to_fd(int handle) | |
207 | { | |
208 | if (handle_is_ok(handle, HANDLE_FILE)) | |
209 | return handles[handle].fd; | |
210 | return -1; | |
211 | } | |
212 | ||
213 | static int | |
214 | handle_close(int handle) | |
215 | { | |
216 | int ret = -1; | |
217 | ||
218 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
219 | ret = close(handles[handle].fd); | |
220 | handles[handle].use = HANDLE_UNUSED; | |
6a9b3198 | 221 | xfree(handles[handle].name); |
3c0ef626 | 222 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
223 | ret = closedir(handles[handle].dirp); | |
224 | handles[handle].use = HANDLE_UNUSED; | |
6a9b3198 | 225 | xfree(handles[handle].name); |
3c0ef626 | 226 | } else { |
227 | errno = ENOENT; | |
228 | } | |
229 | return ret; | |
230 | } | |
231 | ||
232 | static int | |
233 | get_handle(void) | |
234 | { | |
235 | char *handle; | |
236 | int val = -1; | |
237 | u_int hlen; | |
238 | ||
239 | handle = get_string(&hlen); | |
240 | if (hlen < 256) | |
241 | val = handle_from_string(handle, hlen); | |
242 | xfree(handle); | |
243 | return val; | |
244 | } | |
245 | ||
246 | /* send replies */ | |
247 | ||
248 | static void | |
249 | send_msg(Buffer *m) | |
250 | { | |
251 | int mlen = buffer_len(m); | |
252 | ||
253 | buffer_put_int(&oqueue, mlen); | |
254 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
255 | buffer_consume(m, mlen); | |
256 | } | |
257 | ||
258 | static void | |
c9f39d2c | 259 | send_status(u_int32_t id, u_int32_t status) |
3c0ef626 | 260 | { |
261 | Buffer msg; | |
262 | const char *status_messages[] = { | |
263 | "Success", /* SSH_FX_OK */ | |
264 | "End of file", /* SSH_FX_EOF */ | |
265 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
266 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
267 | "Failure", /* SSH_FX_FAILURE */ | |
268 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
269 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
270 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
271 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
272 | "Unknown error" /* Others */ | |
273 | }; | |
274 | ||
c9f39d2c | 275 | TRACE("sent status id %u error %u", id, status); |
3c0ef626 | 276 | buffer_init(&msg); |
277 | buffer_put_char(&msg, SSH2_FXP_STATUS); | |
278 | buffer_put_int(&msg, id); | |
c9f39d2c | 279 | buffer_put_int(&msg, status); |
3c0ef626 | 280 | if (version >= 3) { |
281 | buffer_put_cstring(&msg, | |
c9f39d2c | 282 | status_messages[MIN(status,SSH2_FX_MAX)]); |
3c0ef626 | 283 | buffer_put_cstring(&msg, ""); |
284 | } | |
285 | send_msg(&msg); | |
286 | buffer_free(&msg); | |
287 | } | |
288 | static void | |
cdd66111 | 289 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
3c0ef626 | 290 | { |
291 | Buffer msg; | |
292 | ||
293 | buffer_init(&msg); | |
294 | buffer_put_char(&msg, type); | |
295 | buffer_put_int(&msg, id); | |
296 | buffer_put_string(&msg, data, dlen); | |
297 | send_msg(&msg); | |
298 | buffer_free(&msg); | |
299 | } | |
300 | ||
301 | static void | |
cdd66111 | 302 | send_data(u_int32_t id, const char *data, int dlen) |
3c0ef626 | 303 | { |
680cee3b | 304 | TRACE("sent data id %u len %d", id, dlen); |
3c0ef626 | 305 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
306 | } | |
307 | ||
308 | static void | |
309 | send_handle(u_int32_t id, int handle) | |
310 | { | |
311 | char *string; | |
312 | int hlen; | |
313 | ||
314 | handle_to_string(handle, &string, &hlen); | |
680cee3b | 315 | TRACE("sent handle id %u handle %d", id, handle); |
3c0ef626 | 316 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
317 | xfree(string); | |
318 | } | |
319 | ||
320 | static void | |
cdd66111 | 321 | send_names(u_int32_t id, int count, const Stat *stats) |
3c0ef626 | 322 | { |
323 | Buffer msg; | |
324 | int i; | |
325 | ||
326 | buffer_init(&msg); | |
327 | buffer_put_char(&msg, SSH2_FXP_NAME); | |
328 | buffer_put_int(&msg, id); | |
329 | buffer_put_int(&msg, count); | |
680cee3b | 330 | TRACE("sent names id %u count %d", id, count); |
3c0ef626 | 331 | for (i = 0; i < count; i++) { |
332 | buffer_put_cstring(&msg, stats[i].name); | |
333 | buffer_put_cstring(&msg, stats[i].long_name); | |
334 | encode_attrib(&msg, &stats[i].attrib); | |
335 | } | |
336 | send_msg(&msg); | |
337 | buffer_free(&msg); | |
338 | } | |
339 | ||
340 | static void | |
cdd66111 | 341 | send_attrib(u_int32_t id, const Attrib *a) |
3c0ef626 | 342 | { |
343 | Buffer msg; | |
344 | ||
680cee3b | 345 | TRACE("sent attrib id %u have 0x%x", id, a->flags); |
3c0ef626 | 346 | buffer_init(&msg); |
347 | buffer_put_char(&msg, SSH2_FXP_ATTRS); | |
348 | buffer_put_int(&msg, id); | |
349 | encode_attrib(&msg, a); | |
350 | send_msg(&msg); | |
351 | buffer_free(&msg); | |
352 | } | |
353 | ||
354 | /* parse incoming */ | |
355 | ||
356 | static void | |
357 | process_init(void) | |
358 | { | |
359 | Buffer msg; | |
360 | ||
f5799ae1 | 361 | version = get_int(); |
3c0ef626 | 362 | TRACE("client version %d", version); |
363 | buffer_init(&msg); | |
364 | buffer_put_char(&msg, SSH2_FXP_VERSION); | |
365 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
366 | send_msg(&msg); | |
367 | buffer_free(&msg); | |
368 | } | |
369 | ||
370 | static void | |
371 | process_open(void) | |
372 | { | |
373 | u_int32_t id, pflags; | |
374 | Attrib *a; | |
375 | char *name; | |
376 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; | |
377 | ||
378 | id = get_int(); | |
379 | name = get_string(NULL); | |
380 | pflags = get_int(); /* portable flags */ | |
381 | a = get_attrib(); | |
382 | flags = flags_from_portable(pflags); | |
383 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; | |
680cee3b | 384 | TRACE("open id %u name %s flags %d mode 0%o", id, name, pflags, mode); |
3c0ef626 | 385 | fd = open(name, flags, mode); |
386 | if (fd < 0) { | |
387 | status = errno_to_portable(errno); | |
388 | } else { | |
6a9b3198 | 389 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
3c0ef626 | 390 | if (handle < 0) { |
391 | close(fd); | |
392 | } else { | |
393 | send_handle(id, handle); | |
394 | status = SSH2_FX_OK; | |
395 | } | |
396 | } | |
397 | if (status != SSH2_FX_OK) | |
398 | send_status(id, status); | |
399 | xfree(name); | |
400 | } | |
401 | ||
402 | static void | |
403 | process_close(void) | |
404 | { | |
405 | u_int32_t id; | |
406 | int handle, ret, status = SSH2_FX_FAILURE; | |
407 | ||
408 | id = get_int(); | |
409 | handle = get_handle(); | |
680cee3b | 410 | TRACE("close id %u handle %d", id, handle); |
3c0ef626 | 411 | ret = handle_close(handle); |
412 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
413 | send_status(id, status); | |
414 | } | |
415 | ||
416 | static void | |
417 | process_read(void) | |
418 | { | |
419 | char buf[64*1024]; | |
420 | u_int32_t id, len; | |
421 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
422 | u_int64_t off; | |
423 | ||
424 | id = get_int(); | |
425 | handle = get_handle(); | |
426 | off = get_int64(); | |
427 | len = get_int(); | |
428 | ||
680cee3b | 429 | TRACE("read id %u handle %d off %llu len %d", id, handle, |
3c0ef626 | 430 | (u_int64_t)off, len); |
431 | if (len > sizeof buf) { | |
432 | len = sizeof buf; | |
0fff78ff | 433 | logit("read change len %d", len); |
3c0ef626 | 434 | } |
435 | fd = handle_to_fd(handle); | |
436 | if (fd >= 0) { | |
437 | if (lseek(fd, off, SEEK_SET) < 0) { | |
438 | error("process_read: seek failed"); | |
439 | status = errno_to_portable(errno); | |
440 | } else { | |
441 | ret = read(fd, buf, len); | |
442 | if (ret < 0) { | |
443 | status = errno_to_portable(errno); | |
444 | } else if (ret == 0) { | |
445 | status = SSH2_FX_EOF; | |
446 | } else { | |
447 | send_data(id, buf, ret); | |
448 | status = SSH2_FX_OK; | |
449 | } | |
450 | } | |
451 | } | |
452 | if (status != SSH2_FX_OK) | |
453 | send_status(id, status); | |
454 | } | |
455 | ||
456 | static void | |
457 | process_write(void) | |
458 | { | |
459 | u_int32_t id; | |
460 | u_int64_t off; | |
461 | u_int len; | |
462 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
463 | char *data; | |
464 | ||
465 | id = get_int(); | |
466 | handle = get_handle(); | |
467 | off = get_int64(); | |
468 | data = get_string(&len); | |
469 | ||
680cee3b | 470 | TRACE("write id %u handle %d off %llu len %d", id, handle, |
3c0ef626 | 471 | (u_int64_t)off, len); |
472 | fd = handle_to_fd(handle); | |
473 | if (fd >= 0) { | |
474 | if (lseek(fd, off, SEEK_SET) < 0) { | |
475 | status = errno_to_portable(errno); | |
476 | error("process_write: seek failed"); | |
477 | } else { | |
478 | /* XXX ATOMICIO ? */ | |
479 | ret = write(fd, data, len); | |
480 | if (ret == -1) { | |
481 | error("process_write: write failed"); | |
482 | status = errno_to_portable(errno); | |
483 | } else if (ret == len) { | |
484 | status = SSH2_FX_OK; | |
485 | } else { | |
0fff78ff | 486 | logit("nothing at all written"); |
3c0ef626 | 487 | } |
488 | } | |
489 | } | |
490 | send_status(id, status); | |
491 | xfree(data); | |
492 | } | |
493 | ||
494 | static void | |
495 | process_do_stat(int do_lstat) | |
496 | { | |
497 | Attrib a; | |
498 | struct stat st; | |
499 | u_int32_t id; | |
500 | char *name; | |
501 | int ret, status = SSH2_FX_FAILURE; | |
502 | ||
503 | id = get_int(); | |
504 | name = get_string(NULL); | |
680cee3b | 505 | TRACE("%sstat id %u name %s", do_lstat ? "l" : "", id, name); |
3c0ef626 | 506 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
507 | if (ret < 0) { | |
508 | status = errno_to_portable(errno); | |
509 | } else { | |
510 | stat_to_attrib(&st, &a); | |
511 | send_attrib(id, &a); | |
512 | status = SSH2_FX_OK; | |
513 | } | |
514 | if (status != SSH2_FX_OK) | |
515 | send_status(id, status); | |
516 | xfree(name); | |
517 | } | |
518 | ||
519 | static void | |
520 | process_stat(void) | |
521 | { | |
522 | process_do_stat(0); | |
523 | } | |
524 | ||
525 | static void | |
526 | process_lstat(void) | |
527 | { | |
528 | process_do_stat(1); | |
529 | } | |
530 | ||
531 | static void | |
532 | process_fstat(void) | |
533 | { | |
534 | Attrib a; | |
535 | struct stat st; | |
536 | u_int32_t id; | |
537 | int fd, ret, handle, status = SSH2_FX_FAILURE; | |
538 | ||
539 | id = get_int(); | |
540 | handle = get_handle(); | |
680cee3b | 541 | TRACE("fstat id %u handle %d", id, handle); |
3c0ef626 | 542 | fd = handle_to_fd(handle); |
543 | if (fd >= 0) { | |
544 | ret = fstat(fd, &st); | |
545 | if (ret < 0) { | |
546 | status = errno_to_portable(errno); | |
547 | } else { | |
548 | stat_to_attrib(&st, &a); | |
549 | send_attrib(id, &a); | |
550 | status = SSH2_FX_OK; | |
551 | } | |
552 | } | |
553 | if (status != SSH2_FX_OK) | |
554 | send_status(id, status); | |
555 | } | |
556 | ||
557 | static struct timeval * | |
cdd66111 | 558 | attrib_to_tv(const Attrib *a) |
3c0ef626 | 559 | { |
560 | static struct timeval tv[2]; | |
561 | ||
562 | tv[0].tv_sec = a->atime; | |
563 | tv[0].tv_usec = 0; | |
564 | tv[1].tv_sec = a->mtime; | |
565 | tv[1].tv_usec = 0; | |
566 | return tv; | |
567 | } | |
568 | ||
569 | static void | |
570 | process_setstat(void) | |
571 | { | |
572 | Attrib *a; | |
573 | u_int32_t id; | |
574 | char *name; | |
680cee3b | 575 | int status = SSH2_FX_OK, ret; |
3c0ef626 | 576 | |
577 | id = get_int(); | |
578 | name = get_string(NULL); | |
579 | a = get_attrib(); | |
680cee3b | 580 | TRACE("setstat id %u name %s", id, name); |
e9a17296 | 581 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
582 | ret = truncate(name, a->size); | |
583 | if (ret == -1) | |
584 | status = errno_to_portable(errno); | |
585 | } | |
3c0ef626 | 586 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
587 | ret = chmod(name, a->perm & 0777); | |
588 | if (ret == -1) | |
589 | status = errno_to_portable(errno); | |
590 | } | |
591 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { | |
592 | ret = utimes(name, attrib_to_tv(a)); | |
593 | if (ret == -1) | |
594 | status = errno_to_portable(errno); | |
595 | } | |
596 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { | |
597 | ret = chown(name, a->uid, a->gid); | |
598 | if (ret == -1) | |
599 | status = errno_to_portable(errno); | |
600 | } | |
601 | send_status(id, status); | |
602 | xfree(name); | |
603 | } | |
604 | ||
605 | static void | |
606 | process_fsetstat(void) | |
607 | { | |
608 | Attrib *a; | |
609 | u_int32_t id; | |
610 | int handle, fd, ret; | |
611 | int status = SSH2_FX_OK; | |
612 | char *name; | |
613 | ||
614 | id = get_int(); | |
615 | handle = get_handle(); | |
616 | a = get_attrib(); | |
680cee3b | 617 | TRACE("fsetstat id %u handle %d", id, handle); |
3c0ef626 | 618 | fd = handle_to_fd(handle); |
619 | name = handle_to_name(handle); | |
620 | if (fd < 0 || name == NULL) { | |
621 | status = SSH2_FX_FAILURE; | |
622 | } else { | |
e9a17296 | 623 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
624 | ret = ftruncate(fd, a->size); | |
625 | if (ret == -1) | |
626 | status = errno_to_portable(errno); | |
627 | } | |
3c0ef626 | 628 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
629 | #ifdef HAVE_FCHMOD | |
630 | ret = fchmod(fd, a->perm & 0777); | |
631 | #else | |
632 | ret = chmod(name, a->perm & 0777); | |
633 | #endif | |
634 | if (ret == -1) | |
635 | status = errno_to_portable(errno); | |
636 | } | |
637 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { | |
638 | #ifdef HAVE_FUTIMES | |
639 | ret = futimes(fd, attrib_to_tv(a)); | |
640 | #else | |
641 | ret = utimes(name, attrib_to_tv(a)); | |
642 | #endif | |
643 | if (ret == -1) | |
644 | status = errno_to_portable(errno); | |
645 | } | |
646 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { | |
647 | #ifdef HAVE_FCHOWN | |
648 | ret = fchown(fd, a->uid, a->gid); | |
649 | #else | |
650 | ret = chown(name, a->uid, a->gid); | |
651 | #endif | |
652 | if (ret == -1) | |
653 | status = errno_to_portable(errno); | |
654 | } | |
655 | } | |
656 | send_status(id, status); | |
657 | } | |
658 | ||
659 | static void | |
660 | process_opendir(void) | |
661 | { | |
662 | DIR *dirp = NULL; | |
663 | char *path; | |
664 | int handle, status = SSH2_FX_FAILURE; | |
665 | u_int32_t id; | |
666 | ||
667 | id = get_int(); | |
668 | path = get_string(NULL); | |
680cee3b | 669 | TRACE("opendir id %u path %s", id, path); |
3c0ef626 | 670 | dirp = opendir(path); |
671 | if (dirp == NULL) { | |
672 | status = errno_to_portable(errno); | |
673 | } else { | |
6a9b3198 | 674 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
3c0ef626 | 675 | if (handle < 0) { |
676 | closedir(dirp); | |
677 | } else { | |
678 | send_handle(id, handle); | |
679 | status = SSH2_FX_OK; | |
680 | } | |
681 | ||
682 | } | |
683 | if (status != SSH2_FX_OK) | |
684 | send_status(id, status); | |
685 | xfree(path); | |
686 | } | |
687 | ||
3c0ef626 | 688 | static void |
689 | process_readdir(void) | |
690 | { | |
691 | DIR *dirp; | |
692 | struct dirent *dp; | |
693 | char *path; | |
694 | int handle; | |
695 | u_int32_t id; | |
696 | ||
697 | id = get_int(); | |
698 | handle = get_handle(); | |
680cee3b | 699 | TRACE("readdir id %u handle %d", id, handle); |
3c0ef626 | 700 | dirp = handle_to_dir(handle); |
701 | path = handle_to_name(handle); | |
702 | if (dirp == NULL || path == NULL) { | |
703 | send_status(id, SSH2_FX_FAILURE); | |
704 | } else { | |
705 | struct stat st; | |
706 | char pathname[1024]; | |
707 | Stat *stats; | |
708 | int nstats = 10, count = 0, i; | |
680cee3b | 709 | |
3c0ef626 | 710 | stats = xmalloc(nstats * sizeof(Stat)); |
711 | while ((dp = readdir(dirp)) != NULL) { | |
712 | if (count >= nstats) { | |
713 | nstats *= 2; | |
714 | stats = xrealloc(stats, nstats * sizeof(Stat)); | |
715 | } | |
716 | /* XXX OVERFLOW ? */ | |
717 | snprintf(pathname, sizeof pathname, "%s%s%s", path, | |
718 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
719 | if (lstat(pathname, &st) < 0) | |
720 | continue; | |
721 | stat_to_attrib(&st, &(stats[count].attrib)); | |
722 | stats[count].name = xstrdup(dp->d_name); | |
41b2f314 | 723 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
3c0ef626 | 724 | count++; |
725 | /* send up to 100 entries in one message */ | |
726 | /* XXX check packet size instead */ | |
727 | if (count == 100) | |
728 | break; | |
729 | } | |
730 | if (count > 0) { | |
731 | send_names(id, count, stats); | |
e9a17296 | 732 | for (i = 0; i < count; i++) { |
3c0ef626 | 733 | xfree(stats[i].name); |
734 | xfree(stats[i].long_name); | |
735 | } | |
736 | } else { | |
737 | send_status(id, SSH2_FX_EOF); | |
738 | } | |
739 | xfree(stats); | |
740 | } | |
741 | } | |
742 | ||
743 | static void | |
744 | process_remove(void) | |
745 | { | |
746 | char *name; | |
747 | u_int32_t id; | |
748 | int status = SSH2_FX_FAILURE; | |
749 | int ret; | |
750 | ||
751 | id = get_int(); | |
752 | name = get_string(NULL); | |
680cee3b | 753 | TRACE("remove id %u name %s", id, name); |
3c0ef626 | 754 | ret = unlink(name); |
755 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
756 | send_status(id, status); | |
757 | xfree(name); | |
758 | } | |
759 | ||
760 | static void | |
761 | process_mkdir(void) | |
762 | { | |
763 | Attrib *a; | |
764 | u_int32_t id; | |
765 | char *name; | |
766 | int ret, mode, status = SSH2_FX_FAILURE; | |
767 | ||
768 | id = get_int(); | |
769 | name = get_string(NULL); | |
770 | a = get_attrib(); | |
771 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? | |
772 | a->perm & 0777 : 0777; | |
680cee3b | 773 | TRACE("mkdir id %u name %s mode 0%o", id, name, mode); |
3c0ef626 | 774 | ret = mkdir(name, mode); |
775 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
776 | send_status(id, status); | |
777 | xfree(name); | |
778 | } | |
779 | ||
780 | static void | |
781 | process_rmdir(void) | |
782 | { | |
783 | u_int32_t id; | |
784 | char *name; | |
785 | int ret, status; | |
786 | ||
787 | id = get_int(); | |
788 | name = get_string(NULL); | |
680cee3b | 789 | TRACE("rmdir id %u name %s", id, name); |
3c0ef626 | 790 | ret = rmdir(name); |
791 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
792 | send_status(id, status); | |
793 | xfree(name); | |
794 | } | |
795 | ||
796 | static void | |
797 | process_realpath(void) | |
798 | { | |
799 | char resolvedname[MAXPATHLEN]; | |
800 | u_int32_t id; | |
801 | char *path; | |
802 | ||
803 | id = get_int(); | |
804 | path = get_string(NULL); | |
805 | if (path[0] == '\0') { | |
806 | xfree(path); | |
807 | path = xstrdup("."); | |
808 | } | |
680cee3b | 809 | TRACE("realpath id %u path %s", id, path); |
3c0ef626 | 810 | if (realpath(path, resolvedname) == NULL) { |
811 | send_status(id, errno_to_portable(errno)); | |
812 | } else { | |
813 | Stat s; | |
814 | attrib_clear(&s.attrib); | |
815 | s.name = s.long_name = resolvedname; | |
816 | send_names(id, 1, &s); | |
817 | } | |
818 | xfree(path); | |
819 | } | |
820 | ||
821 | static void | |
822 | process_rename(void) | |
823 | { | |
824 | u_int32_t id; | |
3c0ef626 | 825 | char *oldpath, *newpath; |
6a9b3198 | 826 | int status; |
827 | struct stat sb; | |
3c0ef626 | 828 | |
829 | id = get_int(); | |
830 | oldpath = get_string(NULL); | |
831 | newpath = get_string(NULL); | |
680cee3b | 832 | TRACE("rename id %u old %s new %s", id, oldpath, newpath); |
6a9b3198 | 833 | status = SSH2_FX_FAILURE; |
834 | if (lstat(oldpath, &sb) == -1) | |
835 | status = errno_to_portable(errno); | |
836 | else if (S_ISREG(sb.st_mode)) { | |
837 | /* Race-free rename of regular files */ | |
c9f39d2c | 838 | if (link(oldpath, newpath) == -1) { |
839 | if (errno == EOPNOTSUPP | |
840 | #ifdef LINK_OPNOTSUPP_ERRNO | |
841 | || errno == LINK_OPNOTSUPP_ERRNO | |
842 | #endif | |
843 | ) { | |
844 | struct stat st; | |
845 | ||
846 | /* | |
847 | * fs doesn't support links, so fall back to | |
848 | * stat+rename. This is racy. | |
849 | */ | |
850 | if (stat(newpath, &st) == -1) { | |
851 | if (rename(oldpath, newpath) == -1) | |
852 | status = | |
853 | errno_to_portable(errno); | |
854 | else | |
855 | status = SSH2_FX_OK; | |
856 | } | |
857 | } else { | |
858 | status = errno_to_portable(errno); | |
859 | } | |
860 | } else if (unlink(oldpath) == -1) { | |
6a9b3198 | 861 | status = errno_to_portable(errno); |
862 | /* clean spare link */ | |
863 | unlink(newpath); | |
864 | } else | |
865 | status = SSH2_FX_OK; | |
866 | } else if (stat(newpath, &sb) == -1) { | |
867 | if (rename(oldpath, newpath) == -1) | |
868 | status = errno_to_portable(errno); | |
869 | else | |
870 | status = SSH2_FX_OK; | |
3c0ef626 | 871 | } |
872 | send_status(id, status); | |
873 | xfree(oldpath); | |
874 | xfree(newpath); | |
875 | } | |
876 | ||
877 | static void | |
878 | process_readlink(void) | |
879 | { | |
880 | u_int32_t id; | |
881 | int len; | |
c9f39d2c | 882 | char buf[MAXPATHLEN]; |
3c0ef626 | 883 | char *path; |
884 | ||
885 | id = get_int(); | |
886 | path = get_string(NULL); | |
680cee3b | 887 | TRACE("readlink id %u path %s", id, path); |
c9f39d2c | 888 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3c0ef626 | 889 | send_status(id, errno_to_portable(errno)); |
890 | else { | |
891 | Stat s; | |
e9a17296 | 892 | |
c9f39d2c | 893 | buf[len] = '\0'; |
3c0ef626 | 894 | attrib_clear(&s.attrib); |
c9f39d2c | 895 | s.name = s.long_name = buf; |
3c0ef626 | 896 | send_names(id, 1, &s); |
897 | } | |
898 | xfree(path); | |
899 | } | |
900 | ||
901 | static void | |
902 | process_symlink(void) | |
903 | { | |
904 | u_int32_t id; | |
3c0ef626 | 905 | char *oldpath, *newpath; |
6a9b3198 | 906 | int ret, status; |
3c0ef626 | 907 | |
908 | id = get_int(); | |
909 | oldpath = get_string(NULL); | |
910 | newpath = get_string(NULL); | |
680cee3b | 911 | TRACE("symlink id %u old %s new %s", id, oldpath, newpath); |
6a9b3198 | 912 | /* this will fail if 'newpath' exists */ |
913 | ret = symlink(oldpath, newpath); | |
914 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3c0ef626 | 915 | send_status(id, status); |
916 | xfree(oldpath); | |
917 | xfree(newpath); | |
918 | } | |
919 | ||
920 | static void | |
921 | process_extended(void) | |
922 | { | |
923 | u_int32_t id; | |
924 | char *request; | |
925 | ||
926 | id = get_int(); | |
927 | request = get_string(NULL); | |
928 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
929 | xfree(request); | |
930 | } | |
931 | ||
932 | /* stolen from ssh-agent */ | |
933 | ||
934 | static void | |
935 | process(void) | |
936 | { | |
937 | u_int msg_len; | |
f5799ae1 | 938 | u_int buf_len; |
939 | u_int consumed; | |
3c0ef626 | 940 | u_int type; |
941 | u_char *cp; | |
942 | ||
f5799ae1 | 943 | buf_len = buffer_len(&iqueue); |
944 | if (buf_len < 5) | |
3c0ef626 | 945 | return; /* Incomplete message. */ |
e9a17296 | 946 | cp = buffer_ptr(&iqueue); |
3c0ef626 | 947 | msg_len = GET_32BIT(cp); |
948 | if (msg_len > 256 * 1024) { | |
949 | error("bad message "); | |
950 | exit(11); | |
951 | } | |
f5799ae1 | 952 | if (buf_len < msg_len + 4) |
3c0ef626 | 953 | return; |
954 | buffer_consume(&iqueue, 4); | |
f5799ae1 | 955 | buf_len -= 4; |
3c0ef626 | 956 | type = buffer_get_char(&iqueue); |
957 | switch (type) { | |
958 | case SSH2_FXP_INIT: | |
959 | process_init(); | |
960 | break; | |
961 | case SSH2_FXP_OPEN: | |
962 | process_open(); | |
963 | break; | |
964 | case SSH2_FXP_CLOSE: | |
965 | process_close(); | |
966 | break; | |
967 | case SSH2_FXP_READ: | |
968 | process_read(); | |
969 | break; | |
970 | case SSH2_FXP_WRITE: | |
971 | process_write(); | |
972 | break; | |
973 | case SSH2_FXP_LSTAT: | |
974 | process_lstat(); | |
975 | break; | |
976 | case SSH2_FXP_FSTAT: | |
977 | process_fstat(); | |
978 | break; | |
979 | case SSH2_FXP_SETSTAT: | |
980 | process_setstat(); | |
981 | break; | |
982 | case SSH2_FXP_FSETSTAT: | |
983 | process_fsetstat(); | |
984 | break; | |
985 | case SSH2_FXP_OPENDIR: | |
986 | process_opendir(); | |
987 | break; | |
988 | case SSH2_FXP_READDIR: | |
989 | process_readdir(); | |
990 | break; | |
991 | case SSH2_FXP_REMOVE: | |
992 | process_remove(); | |
993 | break; | |
994 | case SSH2_FXP_MKDIR: | |
995 | process_mkdir(); | |
996 | break; | |
997 | case SSH2_FXP_RMDIR: | |
998 | process_rmdir(); | |
999 | break; | |
1000 | case SSH2_FXP_REALPATH: | |
1001 | process_realpath(); | |
1002 | break; | |
1003 | case SSH2_FXP_STAT: | |
1004 | process_stat(); | |
1005 | break; | |
1006 | case SSH2_FXP_RENAME: | |
1007 | process_rename(); | |
1008 | break; | |
1009 | case SSH2_FXP_READLINK: | |
1010 | process_readlink(); | |
1011 | break; | |
1012 | case SSH2_FXP_SYMLINK: | |
1013 | process_symlink(); | |
1014 | break; | |
1015 | case SSH2_FXP_EXTENDED: | |
1016 | process_extended(); | |
1017 | break; | |
1018 | default: | |
1019 | error("Unknown message %d", type); | |
1020 | break; | |
1021 | } | |
f5799ae1 | 1022 | /* discard the remaining bytes from the current packet */ |
1023 | if (buf_len < buffer_len(&iqueue)) | |
1024 | fatal("iqueue grows"); | |
1025 | consumed = buf_len - buffer_len(&iqueue); | |
1026 | if (msg_len < consumed) | |
1027 | fatal("msg_len %d < consumed %d", msg_len, consumed); | |
1028 | if (msg_len > consumed) | |
1029 | buffer_consume(&iqueue, msg_len - consumed); | |
3c0ef626 | 1030 | } |
1031 | ||
1032 | int | |
1033 | main(int ac, char **av) | |
1034 | { | |
1035 | fd_set *rset, *wset; | |
1036 | int in, out, max; | |
1037 | ssize_t len, olen, set_size; | |
1038 | ||
1039 | /* XXX should use getopt */ | |
1040 | ||
0fff78ff | 1041 | __progname = ssh_get_progname(av[0]); |
3c0ef626 | 1042 | handle_init(); |
1043 | ||
1044 | #ifdef DEBUG_SFTP_SERVER | |
1045 | log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0); | |
1046 | #endif | |
1047 | ||
1048 | in = dup(STDIN_FILENO); | |
1049 | out = dup(STDOUT_FILENO); | |
1050 | ||
1051 | #ifdef HAVE_CYGWIN | |
1052 | setmode(in, O_BINARY); | |
1053 | setmode(out, O_BINARY); | |
1054 | #endif | |
1055 | ||
1056 | max = 0; | |
1057 | if (in > max) | |
1058 | max = in; | |
1059 | if (out > max) | |
1060 | max = out; | |
1061 | ||
1062 | buffer_init(&iqueue); | |
1063 | buffer_init(&oqueue); | |
1064 | ||
1065 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); | |
1066 | rset = (fd_set *)xmalloc(set_size); | |
1067 | wset = (fd_set *)xmalloc(set_size); | |
1068 | ||
1069 | for (;;) { | |
1070 | memset(rset, 0, set_size); | |
1071 | memset(wset, 0, set_size); | |
1072 | ||
1073 | FD_SET(in, rset); | |
1074 | olen = buffer_len(&oqueue); | |
1075 | if (olen > 0) | |
1076 | FD_SET(out, wset); | |
1077 | ||
1078 | if (select(max+1, rset, wset, NULL, NULL) < 0) { | |
1079 | if (errno == EINTR) | |
1080 | continue; | |
1081 | exit(2); | |
1082 | } | |
1083 | ||
1084 | /* copy stdin to iqueue */ | |
1085 | if (FD_ISSET(in, rset)) { | |
1086 | char buf[4*4096]; | |
1087 | len = read(in, buf, sizeof buf); | |
1088 | if (len == 0) { | |
1089 | debug("read eof"); | |
1090 | exit(0); | |
1091 | } else if (len < 0) { | |
1092 | error("read error"); | |
1093 | exit(1); | |
1094 | } else { | |
1095 | buffer_append(&iqueue, buf, len); | |
1096 | } | |
1097 | } | |
1098 | /* send oqueue to stdout */ | |
1099 | if (FD_ISSET(out, wset)) { | |
1100 | len = write(out, buffer_ptr(&oqueue), olen); | |
1101 | if (len < 0) { | |
1102 | error("write error"); | |
1103 | exit(1); | |
1104 | } else { | |
1105 | buffer_consume(&oqueue, len); | |
1106 | } | |
1107 | } | |
1108 | /* process requests from client */ | |
1109 | process(); | |
1110 | } | |
1111 | } |