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b5e300c2 | 1 | /* |
2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. | |
3 | * | |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
b5e300c2 | 12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | #include "includes.h" | |
79ddf6db | 25 | RCSID("$OpenBSD: sftp-server.c,v 1.20 2001/02/21 09:12:56 deraadt Exp $"); |
b5e300c2 | 26 | |
b5e300c2 | 27 | #include "buffer.h" |
28 | #include "bufaux.h" | |
29 | #include "getput.h" | |
42f11eb2 | 30 | #include "log.h" |
b5e300c2 | 31 | #include "xmalloc.h" |
32 | ||
f546c780 | 33 | #include "sftp.h" |
61e96248 | 34 | #include "sftp-common.h" |
b5e300c2 | 35 | |
36 | /* helper */ | |
f546c780 | 37 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 38 | #define get_int() buffer_get_int(&iqueue); |
39 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
f546c780 | 40 | #define TRACE debug |
b5e300c2 | 41 | |
260d427b | 42 | #ifdef HAVE___PROGNAME |
43 | extern char *__progname; | |
44 | #else | |
45 | char *__progname; | |
46 | #endif | |
47 | ||
b5e300c2 | 48 | /* input and output queue */ |
49 | Buffer iqueue; | |
50 | Buffer oqueue; | |
51 | ||
52 | /* portable attibutes, etc. */ | |
53 | ||
b5e300c2 | 54 | typedef struct Stat Stat; |
55 | ||
61e96248 | 56 | struct Stat { |
b5e300c2 | 57 | char *name; |
58 | char *long_name; | |
59 | Attrib attrib; | |
60 | }; | |
61 | ||
62 | int | |
63 | errno_to_portable(int unixerrno) | |
64 | { | |
65 | int ret = 0; | |
66 | switch (unixerrno) { | |
67 | case 0: | |
f546c780 | 68 | ret = SSH2_FX_OK; |
b5e300c2 | 69 | break; |
70 | case ENOENT: | |
71 | case ENOTDIR: | |
72 | case EBADF: | |
73 | case ELOOP: | |
f546c780 | 74 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 75 | break; |
76 | case EPERM: | |
77 | case EACCES: | |
78 | case EFAULT: | |
f546c780 | 79 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 80 | break; |
81 | case ENAMETOOLONG: | |
82 | case EINVAL: | |
f546c780 | 83 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 84 | break; |
85 | default: | |
f546c780 | 86 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 87 | break; |
88 | } | |
89 | return ret; | |
90 | } | |
91 | ||
92 | int | |
93 | flags_from_portable(int pflags) | |
94 | { | |
95 | int flags = 0; | |
79ddf6db | 96 | if ((pflags & SSH2_FXF_READ) && |
97 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 98 | flags = O_RDWR; |
f546c780 | 99 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 100 | flags = O_RDONLY; |
f546c780 | 101 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 102 | flags = O_WRONLY; |
103 | } | |
f546c780 | 104 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 105 | flags |= O_CREAT; |
f546c780 | 106 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 107 | flags |= O_TRUNC; |
f546c780 | 108 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 109 | flags |= O_EXCL; |
110 | return flags; | |
111 | } | |
112 | ||
b5e300c2 | 113 | Attrib * |
114 | get_attrib(void) | |
115 | { | |
116 | return decode_attrib(&iqueue); | |
117 | } | |
118 | ||
119 | /* handle handles */ | |
120 | ||
121 | typedef struct Handle Handle; | |
122 | struct Handle { | |
123 | int use; | |
124 | DIR *dirp; | |
125 | int fd; | |
126 | char *name; | |
127 | }; | |
128 | enum { | |
129 | HANDLE_UNUSED, | |
130 | HANDLE_DIR, | |
131 | HANDLE_FILE | |
132 | }; | |
133 | Handle handles[100]; | |
134 | ||
135 | void | |
136 | handle_init(void) | |
137 | { | |
138 | int i; | |
139 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) | |
140 | handles[i].use = HANDLE_UNUSED; | |
141 | } | |
142 | ||
143 | int | |
144 | handle_new(int use, char *name, int fd, DIR *dirp) | |
145 | { | |
146 | int i; | |
147 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) { | |
148 | if (handles[i].use == HANDLE_UNUSED) { | |
149 | handles[i].use = use; | |
150 | handles[i].dirp = dirp; | |
151 | handles[i].fd = fd; | |
152 | handles[i].name = name; | |
153 | return i; | |
154 | } | |
155 | } | |
156 | return -1; | |
157 | } | |
158 | ||
159 | int | |
160 | handle_is_ok(int i, int type) | |
161 | { | |
f546c780 | 162 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && |
163 | handles[i].use == type; | |
b5e300c2 | 164 | } |
165 | ||
166 | int | |
167 | handle_to_string(int handle, char **stringp, int *hlenp) | |
168 | { | |
b5e300c2 | 169 | if (stringp == NULL || hlenp == NULL) |
170 | return -1; | |
b5c334cc | 171 | *stringp = xmalloc(sizeof(int32_t)); |
172 | PUT_32BIT(*stringp, handle); | |
173 | *hlenp = sizeof(int32_t); | |
b5e300c2 | 174 | return 0; |
175 | } | |
176 | ||
177 | int | |
bcbf86ec | 178 | handle_from_string(char *handle, u_int hlen) |
b5e300c2 | 179 | { |
b5c334cc | 180 | int val; |
181 | if (hlen != sizeof(int32_t)) | |
b5e300c2 | 182 | return -1; |
b5c334cc | 183 | val = GET_32BIT(handle); |
b5e300c2 | 184 | if (handle_is_ok(val, HANDLE_FILE) || |
185 | handle_is_ok(val, HANDLE_DIR)) | |
186 | return val; | |
187 | return -1; | |
188 | } | |
189 | ||
190 | char * | |
191 | handle_to_name(int handle) | |
192 | { | |
193 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
194 | handle_is_ok(handle, HANDLE_FILE)) | |
195 | return handles[handle].name; | |
196 | return NULL; | |
197 | } | |
198 | ||
199 | DIR * | |
200 | handle_to_dir(int handle) | |
201 | { | |
202 | if (handle_is_ok(handle, HANDLE_DIR)) | |
203 | return handles[handle].dirp; | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | int | |
208 | handle_to_fd(int handle) | |
209 | { | |
2b87da3b | 210 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 211 | return handles[handle].fd; |
212 | return -1; | |
213 | } | |
214 | ||
215 | int | |
216 | handle_close(int handle) | |
217 | { | |
218 | int ret = -1; | |
219 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
220 | ret = close(handles[handle].fd); | |
221 | handles[handle].use = HANDLE_UNUSED; | |
222 | } else if (handle_is_ok(handle, HANDLE_DIR)) { | |
223 | ret = closedir(handles[handle].dirp); | |
224 | handles[handle].use = HANDLE_UNUSED; | |
225 | } else { | |
226 | errno = ENOENT; | |
227 | } | |
228 | return ret; | |
229 | } | |
230 | ||
231 | int | |
232 | get_handle(void) | |
233 | { | |
234 | char *handle; | |
f546c780 | 235 | int val = -1; |
bcbf86ec | 236 | u_int hlen; |
b5e300c2 | 237 | handle = get_string(&hlen); |
f546c780 | 238 | if (hlen < 256) |
239 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 240 | xfree(handle); |
241 | return val; | |
242 | } | |
243 | ||
244 | /* send replies */ | |
245 | ||
246 | void | |
247 | send_msg(Buffer *m) | |
248 | { | |
249 | int mlen = buffer_len(m); | |
250 | buffer_put_int(&oqueue, mlen); | |
251 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
252 | buffer_consume(m, mlen); | |
253 | } | |
254 | ||
255 | void | |
256 | send_status(u_int32_t id, u_int32_t error) | |
257 | { | |
258 | Buffer msg; | |
259 | TRACE("sent status id %d error %d", id, error); | |
260 | buffer_init(&msg); | |
f546c780 | 261 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 262 | buffer_put_int(&msg, id); |
263 | buffer_put_int(&msg, error); | |
264 | send_msg(&msg); | |
265 | buffer_free(&msg); | |
266 | } | |
267 | void | |
268 | send_data_or_handle(char type, u_int32_t id, char *data, int dlen) | |
269 | { | |
270 | Buffer msg; | |
271 | buffer_init(&msg); | |
272 | buffer_put_char(&msg, type); | |
273 | buffer_put_int(&msg, id); | |
274 | buffer_put_string(&msg, data, dlen); | |
275 | send_msg(&msg); | |
276 | buffer_free(&msg); | |
277 | } | |
278 | ||
279 | void | |
280 | send_data(u_int32_t id, char *data, int dlen) | |
281 | { | |
282 | TRACE("sent data id %d len %d", id, dlen); | |
f546c780 | 283 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 284 | } |
285 | ||
286 | void | |
287 | send_handle(u_int32_t id, int handle) | |
288 | { | |
289 | char *string; | |
290 | int hlen; | |
291 | handle_to_string(handle, &string, &hlen); | |
292 | TRACE("sent handle id %d handle %d", id, handle); | |
f546c780 | 293 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 294 | xfree(string); |
295 | } | |
296 | ||
297 | void | |
298 | send_names(u_int32_t id, int count, Stat *stats) | |
299 | { | |
300 | Buffer msg; | |
301 | int i; | |
302 | buffer_init(&msg); | |
f546c780 | 303 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 304 | buffer_put_int(&msg, id); |
305 | buffer_put_int(&msg, count); | |
306 | TRACE("sent names id %d count %d", id, count); | |
307 | for (i = 0; i < count; i++) { | |
308 | buffer_put_cstring(&msg, stats[i].name); | |
309 | buffer_put_cstring(&msg, stats[i].long_name); | |
310 | encode_attrib(&msg, &stats[i].attrib); | |
311 | } | |
312 | send_msg(&msg); | |
313 | buffer_free(&msg); | |
314 | } | |
315 | ||
316 | void | |
317 | send_attrib(u_int32_t id, Attrib *a) | |
318 | { | |
319 | Buffer msg; | |
320 | TRACE("sent attrib id %d have 0x%x", id, a->flags); | |
321 | buffer_init(&msg); | |
f546c780 | 322 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 323 | buffer_put_int(&msg, id); |
324 | encode_attrib(&msg, a); | |
325 | send_msg(&msg); | |
326 | buffer_free(&msg); | |
327 | } | |
328 | ||
329 | /* parse incoming */ | |
330 | ||
331 | void | |
332 | process_init(void) | |
333 | { | |
334 | Buffer msg; | |
335 | int version = buffer_get_int(&iqueue); | |
336 | ||
337 | TRACE("client version %d", version); | |
338 | buffer_init(&msg); | |
f546c780 | 339 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
340 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 341 | send_msg(&msg); |
342 | buffer_free(&msg); | |
343 | } | |
344 | ||
345 | void | |
346 | process_open(void) | |
347 | { | |
348 | u_int32_t id, pflags; | |
349 | Attrib *a; | |
350 | char *name; | |
f546c780 | 351 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 352 | |
353 | id = get_int(); | |
354 | name = get_string(NULL); | |
f546c780 | 355 | pflags = get_int(); /* portable flags */ |
b5e300c2 | 356 | a = get_attrib(); |
357 | flags = flags_from_portable(pflags); | |
f546c780 | 358 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
b5e300c2 | 359 | TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode); |
360 | fd = open(name, flags, mode); | |
361 | if (fd < 0) { | |
362 | status = errno_to_portable(errno); | |
363 | } else { | |
364 | handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL); | |
365 | if (handle < 0) { | |
366 | close(fd); | |
367 | } else { | |
368 | send_handle(id, handle); | |
f546c780 | 369 | status = SSH2_FX_OK; |
b5e300c2 | 370 | } |
371 | } | |
f546c780 | 372 | if (status != SSH2_FX_OK) |
b5e300c2 | 373 | send_status(id, status); |
374 | xfree(name); | |
375 | } | |
376 | ||
377 | void | |
378 | process_close(void) | |
379 | { | |
380 | u_int32_t id; | |
f546c780 | 381 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 382 | |
383 | id = get_int(); | |
384 | handle = get_handle(); | |
385 | TRACE("close id %d handle %d", id, handle); | |
386 | ret = handle_close(handle); | |
f546c780 | 387 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 388 | send_status(id, status); |
389 | } | |
390 | ||
391 | void | |
392 | process_read(void) | |
393 | { | |
394 | char buf[64*1024]; | |
f546c780 | 395 | u_int32_t id, len; |
396 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 397 | u_int64_t off; |
398 | ||
399 | id = get_int(); | |
400 | handle = get_handle(); | |
f546c780 | 401 | off = get_int64(); |
b5e300c2 | 402 | len = get_int(); |
403 | ||
9378f292 | 404 | TRACE("read id %d handle %d off %llu len %d", id, handle, |
490cad94 | 405 | (u_int64_t)off, len); |
b5e300c2 | 406 | if (len > sizeof buf) { |
407 | len = sizeof buf; | |
408 | log("read change len %d", len); | |
409 | } | |
410 | fd = handle_to_fd(handle); | |
411 | if (fd >= 0) { | |
412 | if (lseek(fd, off, SEEK_SET) < 0) { | |
413 | error("process_read: seek failed"); | |
414 | status = errno_to_portable(errno); | |
415 | } else { | |
416 | ret = read(fd, buf, len); | |
417 | if (ret < 0) { | |
418 | status = errno_to_portable(errno); | |
419 | } else if (ret == 0) { | |
f546c780 | 420 | status = SSH2_FX_EOF; |
b5e300c2 | 421 | } else { |
422 | send_data(id, buf, ret); | |
f546c780 | 423 | status = SSH2_FX_OK; |
b5e300c2 | 424 | } |
425 | } | |
426 | } | |
f546c780 | 427 | if (status != SSH2_FX_OK) |
b5e300c2 | 428 | send_status(id, status); |
429 | } | |
430 | ||
431 | void | |
432 | process_write(void) | |
433 | { | |
f546c780 | 434 | u_int32_t id; |
b5e300c2 | 435 | u_int64_t off; |
bcbf86ec | 436 | u_int len; |
f546c780 | 437 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 438 | char *data; |
439 | ||
440 | id = get_int(); | |
441 | handle = get_handle(); | |
f546c780 | 442 | off = get_int64(); |
b5e300c2 | 443 | data = get_string(&len); |
444 | ||
9378f292 | 445 | TRACE("write id %d handle %d off %llu len %d", id, handle, |
490cad94 | 446 | (u_int64_t)off, len); |
b5e300c2 | 447 | fd = handle_to_fd(handle); |
448 | if (fd >= 0) { | |
449 | if (lseek(fd, off, SEEK_SET) < 0) { | |
450 | status = errno_to_portable(errno); | |
451 | error("process_write: seek failed"); | |
452 | } else { | |
453 | /* XXX ATOMICIO ? */ | |
454 | ret = write(fd, data, len); | |
455 | if (ret == -1) { | |
456 | error("process_write: write failed"); | |
457 | status = errno_to_portable(errno); | |
458 | } else if (ret == len) { | |
f546c780 | 459 | status = SSH2_FX_OK; |
b5e300c2 | 460 | } else { |
461 | log("nothing at all written"); | |
462 | } | |
463 | } | |
464 | } | |
465 | send_status(id, status); | |
466 | xfree(data); | |
467 | } | |
468 | ||
469 | void | |
470 | process_do_stat(int do_lstat) | |
471 | { | |
b5c334cc | 472 | Attrib a; |
b5e300c2 | 473 | struct stat st; |
474 | u_int32_t id; | |
475 | char *name; | |
f546c780 | 476 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 477 | |
478 | id = get_int(); | |
479 | name = get_string(NULL); | |
480 | TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name); | |
481 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); | |
482 | if (ret < 0) { | |
483 | status = errno_to_portable(errno); | |
484 | } else { | |
b5c334cc | 485 | stat_to_attrib(&st, &a); |
486 | send_attrib(id, &a); | |
f546c780 | 487 | status = SSH2_FX_OK; |
b5e300c2 | 488 | } |
f546c780 | 489 | if (status != SSH2_FX_OK) |
b5e300c2 | 490 | send_status(id, status); |
491 | xfree(name); | |
492 | } | |
493 | ||
494 | void | |
495 | process_stat(void) | |
496 | { | |
497 | process_do_stat(0); | |
498 | } | |
499 | ||
500 | void | |
501 | process_lstat(void) | |
502 | { | |
503 | process_do_stat(1); | |
504 | } | |
505 | ||
506 | void | |
507 | process_fstat(void) | |
508 | { | |
b5c334cc | 509 | Attrib a; |
b5e300c2 | 510 | struct stat st; |
511 | u_int32_t id; | |
f546c780 | 512 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 513 | |
514 | id = get_int(); | |
515 | handle = get_handle(); | |
516 | TRACE("fstat id %d handle %d", id, handle); | |
517 | fd = handle_to_fd(handle); | |
518 | if (fd >= 0) { | |
519 | ret = fstat(fd, &st); | |
520 | if (ret < 0) { | |
521 | status = errno_to_portable(errno); | |
522 | } else { | |
b5c334cc | 523 | stat_to_attrib(&st, &a); |
524 | send_attrib(id, &a); | |
f546c780 | 525 | status = SSH2_FX_OK; |
b5e300c2 | 526 | } |
527 | } | |
f546c780 | 528 | if (status != SSH2_FX_OK) |
b5e300c2 | 529 | send_status(id, status); |
530 | } | |
531 | ||
532 | struct timeval * | |
533 | attrib_to_tv(Attrib *a) | |
534 | { | |
535 | static struct timeval tv[2]; | |
536 | tv[0].tv_sec = a->atime; | |
537 | tv[0].tv_usec = 0; | |
538 | tv[1].tv_sec = a->mtime; | |
539 | tv[1].tv_usec = 0; | |
540 | return tv; | |
541 | } | |
542 | ||
543 | void | |
544 | process_setstat(void) | |
545 | { | |
546 | Attrib *a; | |
547 | u_int32_t id; | |
548 | char *name; | |
549 | int ret; | |
f546c780 | 550 | int status = SSH2_FX_OK; |
b5e300c2 | 551 | |
552 | id = get_int(); | |
553 | name = get_string(NULL); | |
554 | a = get_attrib(); | |
555 | TRACE("setstat id %d name %s", id, name); | |
f546c780 | 556 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
b5e300c2 | 557 | ret = chmod(name, a->perm & 0777); |
558 | if (ret == -1) | |
559 | status = errno_to_portable(errno); | |
560 | } | |
f546c780 | 561 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 562 | ret = utimes(name, attrib_to_tv(a)); |
563 | if (ret == -1) | |
564 | status = errno_to_portable(errno); | |
565 | } | |
408ba72f | 566 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
567 | ret = chown(name, a->uid, a->gid); | |
568 | if (ret == -1) | |
569 | status = errno_to_portable(errno); | |
570 | } | |
b5e300c2 | 571 | send_status(id, status); |
572 | xfree(name); | |
573 | } | |
574 | ||
575 | void | |
576 | process_fsetstat(void) | |
577 | { | |
578 | Attrib *a; | |
579 | u_int32_t id; | |
580 | int handle, fd, ret; | |
f546c780 | 581 | int status = SSH2_FX_OK; |
bcbf86ec | 582 | char *name; |
16e538d4 | 583 | |
b5e300c2 | 584 | id = get_int(); |
585 | handle = get_handle(); | |
586 | a = get_attrib(); | |
587 | TRACE("fsetstat id %d handle %d", id, handle); | |
588 | fd = handle_to_fd(handle); | |
589 | name = handle_to_name(handle); | |
16e538d4 | 590 | if (fd < 0 || name == NULL) { |
f546c780 | 591 | status = SSH2_FX_FAILURE; |
b5e300c2 | 592 | } else { |
f546c780 | 593 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
2fd3c144 | 594 | #ifdef HAVE_FCHMOD |
b5e300c2 | 595 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 596 | #else |
c33f0b36 | 597 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 598 | #endif |
b5e300c2 | 599 | if (ret == -1) |
600 | status = errno_to_portable(errno); | |
601 | } | |
f546c780 | 602 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 603 | #ifdef HAVE_FUTIMES |
604 | ret = futimes(fd, attrib_to_tv(a)); | |
605 | #else | |
606 | ret = utimes(name, attrib_to_tv(a)); | |
607 | #endif | |
608 | if (ret == -1) | |
609 | status = errno_to_portable(errno); | |
610 | } | |
408ba72f | 611 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
01f13020 | 612 | #ifdef HAVE_FCHOWN |
408ba72f | 613 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 614 | #else |
615 | ret = chown(name, a->uid, a->gid); | |
616 | #endif | |
408ba72f | 617 | if (ret == -1) |
618 | status = errno_to_portable(errno); | |
619 | } | |
b5e300c2 | 620 | } |
621 | send_status(id, status); | |
622 | } | |
623 | ||
624 | void | |
625 | process_opendir(void) | |
626 | { | |
627 | DIR *dirp = NULL; | |
628 | char *path; | |
f546c780 | 629 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 630 | u_int32_t id; |
631 | ||
632 | id = get_int(); | |
633 | path = get_string(NULL); | |
634 | TRACE("opendir id %d path %s", id, path); | |
2b87da3b | 635 | dirp = opendir(path); |
b5e300c2 | 636 | if (dirp == NULL) { |
637 | status = errno_to_portable(errno); | |
638 | } else { | |
639 | handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp); | |
640 | if (handle < 0) { | |
641 | closedir(dirp); | |
642 | } else { | |
643 | send_handle(id, handle); | |
f546c780 | 644 | status = SSH2_FX_OK; |
b5e300c2 | 645 | } |
2b87da3b | 646 | |
b5e300c2 | 647 | } |
f546c780 | 648 | if (status != SSH2_FX_OK) |
b5e300c2 | 649 | send_status(id, status); |
650 | xfree(path); | |
651 | } | |
652 | ||
f546c780 | 653 | /* |
b5c334cc | 654 | * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh |
f546c780 | 655 | */ |
b5e300c2 | 656 | char * |
657 | ls_file(char *name, struct stat *st) | |
658 | { | |
b5c334cc | 659 | int sz = 0; |
660 | struct passwd *pw; | |
661 | struct group *gr; | |
662 | struct tm *ltime = localtime(&st->st_mtime); | |
663 | char *user, *group; | |
664 | char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; | |
665 | ||
666 | strmode(st->st_mode, mode); | |
667 | if ((pw = getpwuid(st->st_uid)) != NULL) { | |
668 | user = pw->pw_name; | |
669 | } else { | |
670 | snprintf(ubuf, sizeof ubuf, "%d", st->st_uid); | |
671 | user = ubuf; | |
672 | } | |
673 | if ((gr = getgrgid(st->st_gid)) != NULL) { | |
674 | group = gr->gr_name; | |
675 | } else { | |
676 | snprintf(gbuf, sizeof gbuf, "%d", st->st_gid); | |
677 | group = gbuf; | |
678 | } | |
679 | if (ltime != NULL) { | |
680 | if (time(NULL) - st->st_mtime < (365*24*60*60)/2) | |
681 | sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); | |
682 | else | |
683 | sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); | |
684 | } | |
685 | if (sz == 0) | |
686 | tbuf[0] = '\0'; | |
27df9d4a | 687 | snprintf(buf, sizeof buf, "%s %3d %-8.8s %-8.8s %8llu %s %s", mode, |
490cad94 | 688 | st->st_nlink, user, group, (u_int64_t)st->st_size, tbuf, name); |
b5e300c2 | 689 | return xstrdup(buf); |
690 | } | |
691 | ||
692 | 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(); | |
703 | TRACE("readdir id %d handle %d", id, handle); | |
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; | |
713 | stats = xmalloc(nstats * sizeof(Stat)); | |
714 | while ((dp = readdir(dirp)) != NULL) { | |
715 | if (count >= nstats) { | |
716 | nstats *= 2; | |
717 | stats = xrealloc(stats, nstats * sizeof(Stat)); | |
718 | } | |
719 | /* XXX OVERFLOW ? */ | |
720 | snprintf(pathname, sizeof pathname, | |
721 | "%s/%s", path, dp->d_name); | |
722 | if (lstat(pathname, &st) < 0) | |
723 | continue; | |
b5c334cc | 724 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 725 | stats[count].name = xstrdup(dp->d_name); |
726 | stats[count].long_name = ls_file(dp->d_name, &st); | |
727 | count++; | |
728 | /* send up to 100 entries in one message */ | |
b5c334cc | 729 | /* XXX check packet size instead */ |
b5e300c2 | 730 | if (count == 100) |
731 | break; | |
732 | } | |
f546c780 | 733 | if (count > 0) { |
734 | send_names(id, count, stats); | |
735 | for(i = 0; i < count; i++) { | |
736 | xfree(stats[i].name); | |
737 | xfree(stats[i].long_name); | |
738 | } | |
739 | } else { | |
740 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 741 | } |
742 | xfree(stats); | |
743 | } | |
744 | } | |
745 | ||
746 | void | |
747 | process_remove(void) | |
748 | { | |
749 | char *name; | |
750 | u_int32_t id; | |
f546c780 | 751 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 752 | int ret; |
753 | ||
754 | id = get_int(); | |
755 | name = get_string(NULL); | |
756 | TRACE("remove id %d name %s", id, name); | |
67b0facb | 757 | ret = unlink(name); |
f546c780 | 758 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 759 | send_status(id, status); |
760 | xfree(name); | |
761 | } | |
762 | ||
763 | void | |
764 | process_mkdir(void) | |
765 | { | |
766 | Attrib *a; | |
767 | u_int32_t id; | |
768 | char *name; | |
f546c780 | 769 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 770 | |
771 | id = get_int(); | |
772 | name = get_string(NULL); | |
773 | a = get_attrib(); | |
f546c780 | 774 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
775 | a->perm & 0777 : 0777; | |
b5e300c2 | 776 | TRACE("mkdir id %d name %s mode 0%o", id, name, mode); |
777 | ret = mkdir(name, mode); | |
f546c780 | 778 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 779 | send_status(id, status); |
780 | xfree(name); | |
781 | } | |
782 | ||
783 | void | |
784 | process_rmdir(void) | |
785 | { | |
786 | u_int32_t id; | |
787 | char *name; | |
788 | int ret, status; | |
789 | ||
790 | id = get_int(); | |
791 | name = get_string(NULL); | |
792 | TRACE("rmdir id %d name %s", id, name); | |
793 | ret = rmdir(name); | |
f546c780 | 794 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 795 | send_status(id, status); |
796 | xfree(name); | |
797 | } | |
798 | ||
799 | void | |
800 | process_realpath(void) | |
801 | { | |
802 | char resolvedname[MAXPATHLEN]; | |
803 | u_int32_t id; | |
804 | char *path; | |
805 | ||
806 | id = get_int(); | |
807 | path = get_string(NULL); | |
6b523bae | 808 | if (path[0] == '\0') { |
809 | xfree(path); | |
810 | path = xstrdup("."); | |
811 | } | |
b5e300c2 | 812 | TRACE("realpath id %d path %s", id, path); |
813 | if (realpath(path, resolvedname) == NULL) { | |
814 | send_status(id, errno_to_portable(errno)); | |
815 | } else { | |
816 | Stat s; | |
817 | attrib_clear(&s.attrib); | |
818 | s.name = s.long_name = resolvedname; | |
819 | send_names(id, 1, &s); | |
820 | } | |
821 | xfree(path); | |
822 | } | |
823 | ||
824 | void | |
825 | process_rename(void) | |
826 | { | |
827 | u_int32_t id; | |
b5c334cc | 828 | struct stat st; |
b5e300c2 | 829 | char *oldpath, *newpath; |
b5c334cc | 830 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 831 | |
832 | id = get_int(); | |
833 | oldpath = get_string(NULL); | |
834 | newpath = get_string(NULL); | |
835 | TRACE("rename id %d old %s new %s", id, oldpath, newpath); | |
b5c334cc | 836 | /* fail if 'newpath' exists */ |
837 | if (stat(newpath, &st) == -1) { | |
838 | ret = rename(oldpath, newpath); | |
839 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
840 | } | |
b5e300c2 | 841 | send_status(id, status); |
842 | xfree(oldpath); | |
843 | xfree(newpath); | |
844 | } | |
845 | ||
f546c780 | 846 | void |
847 | process_extended(void) | |
848 | { | |
849 | u_int32_t id; | |
850 | char *request; | |
851 | ||
852 | id = get_int(); | |
853 | request = get_string(NULL); | |
854 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
855 | xfree(request); | |
856 | } | |
b5e300c2 | 857 | |
858 | /* stolen from ssh-agent */ | |
859 | ||
860 | void | |
861 | process(void) | |
862 | { | |
1e3b8b07 | 863 | u_int msg_len; |
864 | u_int type; | |
865 | u_char *cp; | |
b5e300c2 | 866 | |
867 | if (buffer_len(&iqueue) < 5) | |
868 | return; /* Incomplete message. */ | |
1e3b8b07 | 869 | cp = (u_char *) buffer_ptr(&iqueue); |
b5e300c2 | 870 | msg_len = GET_32BIT(cp); |
871 | if (msg_len > 256 * 1024) { | |
872 | error("bad message "); | |
873 | exit(11); | |
874 | } | |
875 | if (buffer_len(&iqueue) < msg_len + 4) | |
876 | return; | |
877 | buffer_consume(&iqueue, 4); | |
878 | type = buffer_get_char(&iqueue); | |
879 | switch (type) { | |
f546c780 | 880 | case SSH2_FXP_INIT: |
b5e300c2 | 881 | process_init(); |
882 | break; | |
f546c780 | 883 | case SSH2_FXP_OPEN: |
b5e300c2 | 884 | process_open(); |
885 | break; | |
f546c780 | 886 | case SSH2_FXP_CLOSE: |
b5e300c2 | 887 | process_close(); |
888 | break; | |
f546c780 | 889 | case SSH2_FXP_READ: |
b5e300c2 | 890 | process_read(); |
891 | break; | |
f546c780 | 892 | case SSH2_FXP_WRITE: |
b5e300c2 | 893 | process_write(); |
894 | break; | |
f546c780 | 895 | case SSH2_FXP_LSTAT: |
b5e300c2 | 896 | process_lstat(); |
897 | break; | |
f546c780 | 898 | case SSH2_FXP_FSTAT: |
b5e300c2 | 899 | process_fstat(); |
900 | break; | |
f546c780 | 901 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 902 | process_setstat(); |
903 | break; | |
f546c780 | 904 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 905 | process_fsetstat(); |
906 | break; | |
f546c780 | 907 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 908 | process_opendir(); |
909 | break; | |
f546c780 | 910 | case SSH2_FXP_READDIR: |
b5e300c2 | 911 | process_readdir(); |
912 | break; | |
f546c780 | 913 | case SSH2_FXP_REMOVE: |
b5e300c2 | 914 | process_remove(); |
915 | break; | |
f546c780 | 916 | case SSH2_FXP_MKDIR: |
b5e300c2 | 917 | process_mkdir(); |
918 | break; | |
f546c780 | 919 | case SSH2_FXP_RMDIR: |
b5e300c2 | 920 | process_rmdir(); |
921 | break; | |
f546c780 | 922 | case SSH2_FXP_REALPATH: |
b5e300c2 | 923 | process_realpath(); |
924 | break; | |
f546c780 | 925 | case SSH2_FXP_STAT: |
b5e300c2 | 926 | process_stat(); |
927 | break; | |
f546c780 | 928 | case SSH2_FXP_RENAME: |
b5e300c2 | 929 | process_rename(); |
930 | break; | |
f546c780 | 931 | case SSH2_FXP_EXTENDED: |
932 | process_extended(); | |
933 | break; | |
b5e300c2 | 934 | default: |
935 | error("Unknown message %d", type); | |
936 | break; | |
937 | } | |
938 | } | |
939 | ||
940 | int | |
941 | main(int ac, char **av) | |
942 | { | |
943 | fd_set rset, wset; | |
944 | int in, out, max; | |
bcbf86ec | 945 | ssize_t len, olen; |
b5e300c2 | 946 | |
260d427b | 947 | __progname = get_progname(av[0]); |
b5e300c2 | 948 | handle_init(); |
949 | ||
b5c334cc | 950 | #ifdef DEBUG_SFTP_SERVER |
2b87da3b | 951 | log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0); |
b5c334cc | 952 | #endif |
f546c780 | 953 | |
b5e300c2 | 954 | in = dup(STDIN_FILENO); |
955 | out = dup(STDOUT_FILENO); | |
956 | ||
957 | max = 0; | |
958 | if (in > max) | |
959 | max = in; | |
960 | if (out > max) | |
961 | max = out; | |
962 | ||
963 | buffer_init(&iqueue); | |
964 | buffer_init(&oqueue); | |
965 | ||
966 | for (;;) { | |
967 | FD_ZERO(&rset); | |
968 | FD_ZERO(&wset); | |
969 | ||
970 | FD_SET(in, &rset); | |
971 | olen = buffer_len(&oqueue); | |
972 | if (olen > 0) | |
973 | FD_SET(out, &wset); | |
974 | ||
975 | if (select(max+1, &rset, &wset, NULL, NULL) < 0) { | |
976 | if (errno == EINTR) | |
977 | continue; | |
978 | exit(2); | |
979 | } | |
980 | ||
981 | /* copy stdin to iqueue */ | |
982 | if (FD_ISSET(in, &rset)) { | |
983 | char buf[4*4096]; | |
984 | len = read(in, buf, sizeof buf); | |
985 | if (len == 0) { | |
986 | debug("read eof"); | |
987 | exit(0); | |
988 | } else if (len < 0) { | |
989 | error("read error"); | |
990 | exit(1); | |
991 | } else { | |
992 | buffer_append(&iqueue, buf, len); | |
993 | } | |
994 | } | |
995 | /* send oqueue to stdout */ | |
996 | if (FD_ISSET(out, &wset)) { | |
997 | len = write(out, buffer_ptr(&oqueue), olen); | |
998 | if (len < 0) { | |
999 | error("write error"); | |
1000 | exit(1); | |
1001 | } else { | |
1002 | buffer_consume(&oqueue, len); | |
1003 | } | |
1004 | } | |
1005 | /* process requests from client */ | |
1006 | process(); | |
1007 | } | |
1008 | } |