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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" | |
cd332296 | 25 | RCSID("$OpenBSD: sftp-server.c,v 1.25 2001/04/05 10:42:53 markus 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 | ||
3a7fe5ba | 52 | /* Version of client */ |
53 | int version; | |
54 | ||
b5e300c2 | 55 | /* portable attibutes, etc. */ |
56 | ||
b5e300c2 | 57 | typedef struct Stat Stat; |
58 | ||
61e96248 | 59 | struct Stat { |
b5e300c2 | 60 | char *name; |
61 | char *long_name; | |
62 | Attrib attrib; | |
63 | }; | |
64 | ||
65 | int | |
66 | errno_to_portable(int unixerrno) | |
67 | { | |
68 | int ret = 0; | |
dce9bac5 | 69 | |
b5e300c2 | 70 | switch (unixerrno) { |
71 | case 0: | |
f546c780 | 72 | ret = SSH2_FX_OK; |
b5e300c2 | 73 | break; |
74 | case ENOENT: | |
75 | case ENOTDIR: | |
76 | case EBADF: | |
77 | case ELOOP: | |
f546c780 | 78 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 79 | break; |
80 | case EPERM: | |
81 | case EACCES: | |
82 | case EFAULT: | |
f546c780 | 83 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 84 | break; |
85 | case ENAMETOOLONG: | |
86 | case EINVAL: | |
f546c780 | 87 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 88 | break; |
89 | default: | |
f546c780 | 90 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 91 | break; |
92 | } | |
93 | return ret; | |
94 | } | |
95 | ||
96 | int | |
97 | flags_from_portable(int pflags) | |
98 | { | |
99 | int flags = 0; | |
dce9bac5 | 100 | |
79ddf6db | 101 | if ((pflags & SSH2_FXF_READ) && |
102 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 103 | flags = O_RDWR; |
f546c780 | 104 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 105 | flags = O_RDONLY; |
f546c780 | 106 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 107 | flags = O_WRONLY; |
108 | } | |
f546c780 | 109 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 110 | flags |= O_CREAT; |
f546c780 | 111 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 112 | flags |= O_TRUNC; |
f546c780 | 113 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 114 | flags |= O_EXCL; |
115 | return flags; | |
116 | } | |
117 | ||
b5e300c2 | 118 | Attrib * |
119 | get_attrib(void) | |
120 | { | |
121 | return decode_attrib(&iqueue); | |
122 | } | |
123 | ||
124 | /* handle handles */ | |
125 | ||
126 | typedef struct Handle Handle; | |
127 | struct Handle { | |
128 | int use; | |
129 | DIR *dirp; | |
130 | int fd; | |
131 | char *name; | |
132 | }; | |
dce9bac5 | 133 | |
b5e300c2 | 134 | enum { |
135 | HANDLE_UNUSED, | |
136 | HANDLE_DIR, | |
137 | HANDLE_FILE | |
138 | }; | |
dce9bac5 | 139 | |
b5e300c2 | 140 | Handle handles[100]; |
141 | ||
142 | void | |
143 | handle_init(void) | |
144 | { | |
145 | int i; | |
dce9bac5 | 146 | |
b5e300c2 | 147 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
148 | handles[i].use = HANDLE_UNUSED; | |
149 | } | |
150 | ||
151 | int | |
152 | handle_new(int use, char *name, int fd, DIR *dirp) | |
153 | { | |
154 | int i; | |
dce9bac5 | 155 | |
b5e300c2 | 156 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
157 | if (handles[i].use == HANDLE_UNUSED) { | |
158 | handles[i].use = use; | |
159 | handles[i].dirp = dirp; | |
160 | handles[i].fd = fd; | |
161 | handles[i].name = name; | |
162 | return i; | |
163 | } | |
164 | } | |
165 | return -1; | |
166 | } | |
167 | ||
168 | int | |
169 | handle_is_ok(int i, int type) | |
170 | { | |
f546c780 | 171 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && |
172 | handles[i].use == type; | |
b5e300c2 | 173 | } |
174 | ||
175 | int | |
176 | handle_to_string(int handle, char **stringp, int *hlenp) | |
177 | { | |
b5e300c2 | 178 | if (stringp == NULL || hlenp == NULL) |
179 | return -1; | |
b5c334cc | 180 | *stringp = xmalloc(sizeof(int32_t)); |
181 | PUT_32BIT(*stringp, handle); | |
182 | *hlenp = sizeof(int32_t); | |
b5e300c2 | 183 | return 0; |
184 | } | |
185 | ||
186 | int | |
bcbf86ec | 187 | handle_from_string(char *handle, u_int hlen) |
b5e300c2 | 188 | { |
b5c334cc | 189 | int val; |
dce9bac5 | 190 | |
b5c334cc | 191 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 192 | return -1; |
b5c334cc | 193 | val = GET_32BIT(handle); |
b5e300c2 | 194 | if (handle_is_ok(val, HANDLE_FILE) || |
195 | handle_is_ok(val, HANDLE_DIR)) | |
196 | return val; | |
197 | return -1; | |
198 | } | |
199 | ||
200 | char * | |
201 | handle_to_name(int handle) | |
202 | { | |
203 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
204 | handle_is_ok(handle, HANDLE_FILE)) | |
205 | return handles[handle].name; | |
206 | return NULL; | |
207 | } | |
208 | ||
209 | DIR * | |
210 | handle_to_dir(int handle) | |
211 | { | |
212 | if (handle_is_ok(handle, HANDLE_DIR)) | |
213 | return handles[handle].dirp; | |
214 | return NULL; | |
215 | } | |
216 | ||
217 | int | |
218 | handle_to_fd(int handle) | |
219 | { | |
2b87da3b | 220 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 221 | return handles[handle].fd; |
222 | return -1; | |
223 | } | |
224 | ||
225 | int | |
226 | handle_close(int handle) | |
227 | { | |
228 | int ret = -1; | |
dce9bac5 | 229 | |
b5e300c2 | 230 | if (handle_is_ok(handle, HANDLE_FILE)) { |
231 | ret = close(handles[handle].fd); | |
232 | handles[handle].use = HANDLE_UNUSED; | |
233 | } else if (handle_is_ok(handle, HANDLE_DIR)) { | |
234 | ret = closedir(handles[handle].dirp); | |
235 | handles[handle].use = HANDLE_UNUSED; | |
236 | } else { | |
237 | errno = ENOENT; | |
238 | } | |
239 | return ret; | |
240 | } | |
241 | ||
242 | int | |
243 | get_handle(void) | |
244 | { | |
245 | char *handle; | |
f546c780 | 246 | int val = -1; |
bcbf86ec | 247 | u_int hlen; |
dce9bac5 | 248 | |
b5e300c2 | 249 | handle = get_string(&hlen); |
f546c780 | 250 | if (hlen < 256) |
251 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 252 | xfree(handle); |
253 | return val; | |
254 | } | |
255 | ||
256 | /* send replies */ | |
257 | ||
258 | void | |
259 | send_msg(Buffer *m) | |
260 | { | |
261 | int mlen = buffer_len(m); | |
dce9bac5 | 262 | |
b5e300c2 | 263 | buffer_put_int(&oqueue, mlen); |
264 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
265 | buffer_consume(m, mlen); | |
266 | } | |
267 | ||
268 | void | |
269 | send_status(u_int32_t id, u_int32_t error) | |
270 | { | |
271 | Buffer msg; | |
3a7fe5ba | 272 | const char *status_messages[] = { |
273 | "Success", /* SSH_FX_OK */ | |
274 | "End of file", /* SSH_FX_EOF */ | |
275 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
276 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
277 | "Failure", /* SSH_FX_FAILURE */ | |
278 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
279 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
280 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
281 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
282 | "Unknown error" /* Others */ | |
283 | }; | |
dce9bac5 | 284 | |
b5e300c2 | 285 | TRACE("sent status id %d error %d", id, error); |
286 | buffer_init(&msg); | |
f546c780 | 287 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 288 | buffer_put_int(&msg, id); |
289 | buffer_put_int(&msg, error); | |
3a7fe5ba | 290 | if (version >= 3) { |
cd332296 | 291 | buffer_put_cstring(&msg, |
3a7fe5ba | 292 | status_messages[MIN(error,SSH2_FX_MAX)]); |
293 | buffer_put_cstring(&msg, ""); | |
294 | } | |
b5e300c2 | 295 | send_msg(&msg); |
296 | buffer_free(&msg); | |
297 | } | |
298 | void | |
299 | send_data_or_handle(char type, u_int32_t id, char *data, int dlen) | |
300 | { | |
301 | Buffer msg; | |
dce9bac5 | 302 | |
b5e300c2 | 303 | buffer_init(&msg); |
304 | buffer_put_char(&msg, type); | |
305 | buffer_put_int(&msg, id); | |
306 | buffer_put_string(&msg, data, dlen); | |
307 | send_msg(&msg); | |
308 | buffer_free(&msg); | |
309 | } | |
310 | ||
311 | void | |
312 | send_data(u_int32_t id, char *data, int dlen) | |
313 | { | |
314 | TRACE("sent data id %d len %d", id, dlen); | |
f546c780 | 315 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 316 | } |
317 | ||
318 | void | |
319 | send_handle(u_int32_t id, int handle) | |
320 | { | |
321 | char *string; | |
322 | int hlen; | |
dce9bac5 | 323 | |
b5e300c2 | 324 | handle_to_string(handle, &string, &hlen); |
325 | TRACE("sent handle id %d handle %d", id, handle); | |
f546c780 | 326 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 327 | xfree(string); |
328 | } | |
329 | ||
330 | void | |
331 | send_names(u_int32_t id, int count, Stat *stats) | |
332 | { | |
333 | Buffer msg; | |
334 | int i; | |
dce9bac5 | 335 | |
b5e300c2 | 336 | buffer_init(&msg); |
f546c780 | 337 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 338 | buffer_put_int(&msg, id); |
339 | buffer_put_int(&msg, count); | |
340 | TRACE("sent names id %d count %d", id, count); | |
341 | for (i = 0; i < count; i++) { | |
342 | buffer_put_cstring(&msg, stats[i].name); | |
343 | buffer_put_cstring(&msg, stats[i].long_name); | |
344 | encode_attrib(&msg, &stats[i].attrib); | |
345 | } | |
346 | send_msg(&msg); | |
347 | buffer_free(&msg); | |
348 | } | |
349 | ||
350 | void | |
351 | send_attrib(u_int32_t id, Attrib *a) | |
352 | { | |
353 | Buffer msg; | |
dce9bac5 | 354 | |
b5e300c2 | 355 | TRACE("sent attrib id %d have 0x%x", id, a->flags); |
356 | buffer_init(&msg); | |
f546c780 | 357 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 358 | buffer_put_int(&msg, id); |
359 | encode_attrib(&msg, a); | |
360 | send_msg(&msg); | |
361 | buffer_free(&msg); | |
362 | } | |
363 | ||
364 | /* parse incoming */ | |
365 | ||
366 | void | |
367 | process_init(void) | |
368 | { | |
369 | Buffer msg; | |
b5e300c2 | 370 | |
3a7fe5ba | 371 | version = buffer_get_int(&iqueue); |
b5e300c2 | 372 | TRACE("client version %d", version); |
373 | buffer_init(&msg); | |
f546c780 | 374 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
375 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 376 | send_msg(&msg); |
377 | buffer_free(&msg); | |
378 | } | |
379 | ||
380 | void | |
381 | process_open(void) | |
382 | { | |
383 | u_int32_t id, pflags; | |
384 | Attrib *a; | |
385 | char *name; | |
f546c780 | 386 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 387 | |
388 | id = get_int(); | |
389 | name = get_string(NULL); | |
f546c780 | 390 | pflags = get_int(); /* portable flags */ |
b5e300c2 | 391 | a = get_attrib(); |
392 | flags = flags_from_portable(pflags); | |
f546c780 | 393 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
b5e300c2 | 394 | TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode); |
395 | fd = open(name, flags, mode); | |
396 | if (fd < 0) { | |
397 | status = errno_to_portable(errno); | |
398 | } else { | |
399 | handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL); | |
400 | if (handle < 0) { | |
401 | close(fd); | |
402 | } else { | |
403 | send_handle(id, handle); | |
f546c780 | 404 | status = SSH2_FX_OK; |
b5e300c2 | 405 | } |
406 | } | |
f546c780 | 407 | if (status != SSH2_FX_OK) |
b5e300c2 | 408 | send_status(id, status); |
409 | xfree(name); | |
410 | } | |
411 | ||
412 | void | |
413 | process_close(void) | |
414 | { | |
415 | u_int32_t id; | |
f546c780 | 416 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 417 | |
418 | id = get_int(); | |
419 | handle = get_handle(); | |
420 | TRACE("close id %d handle %d", id, handle); | |
421 | ret = handle_close(handle); | |
f546c780 | 422 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 423 | send_status(id, status); |
424 | } | |
425 | ||
426 | void | |
427 | process_read(void) | |
428 | { | |
429 | char buf[64*1024]; | |
f546c780 | 430 | u_int32_t id, len; |
431 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 432 | u_int64_t off; |
433 | ||
434 | id = get_int(); | |
435 | handle = get_handle(); | |
f546c780 | 436 | off = get_int64(); |
b5e300c2 | 437 | len = get_int(); |
438 | ||
9378f292 | 439 | TRACE("read id %d handle %d off %llu len %d", id, handle, |
490cad94 | 440 | (u_int64_t)off, len); |
b5e300c2 | 441 | if (len > sizeof buf) { |
442 | len = sizeof buf; | |
443 | log("read change len %d", len); | |
444 | } | |
445 | fd = handle_to_fd(handle); | |
446 | if (fd >= 0) { | |
447 | if (lseek(fd, off, SEEK_SET) < 0) { | |
448 | error("process_read: seek failed"); | |
449 | status = errno_to_portable(errno); | |
450 | } else { | |
451 | ret = read(fd, buf, len); | |
452 | if (ret < 0) { | |
453 | status = errno_to_portable(errno); | |
454 | } else if (ret == 0) { | |
f546c780 | 455 | status = SSH2_FX_EOF; |
b5e300c2 | 456 | } else { |
457 | send_data(id, buf, ret); | |
f546c780 | 458 | status = SSH2_FX_OK; |
b5e300c2 | 459 | } |
460 | } | |
461 | } | |
f546c780 | 462 | if (status != SSH2_FX_OK) |
b5e300c2 | 463 | send_status(id, status); |
464 | } | |
465 | ||
466 | void | |
467 | process_write(void) | |
468 | { | |
f546c780 | 469 | u_int32_t id; |
b5e300c2 | 470 | u_int64_t off; |
bcbf86ec | 471 | u_int len; |
f546c780 | 472 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 473 | char *data; |
474 | ||
475 | id = get_int(); | |
476 | handle = get_handle(); | |
f546c780 | 477 | off = get_int64(); |
b5e300c2 | 478 | data = get_string(&len); |
479 | ||
9378f292 | 480 | TRACE("write id %d handle %d off %llu len %d", id, handle, |
490cad94 | 481 | (u_int64_t)off, len); |
b5e300c2 | 482 | fd = handle_to_fd(handle); |
483 | if (fd >= 0) { | |
484 | if (lseek(fd, off, SEEK_SET) < 0) { | |
485 | status = errno_to_portable(errno); | |
486 | error("process_write: seek failed"); | |
487 | } else { | |
488 | /* XXX ATOMICIO ? */ | |
489 | ret = write(fd, data, len); | |
490 | if (ret == -1) { | |
491 | error("process_write: write failed"); | |
492 | status = errno_to_portable(errno); | |
493 | } else if (ret == len) { | |
f546c780 | 494 | status = SSH2_FX_OK; |
b5e300c2 | 495 | } else { |
496 | log("nothing at all written"); | |
497 | } | |
498 | } | |
499 | } | |
500 | send_status(id, status); | |
501 | xfree(data); | |
502 | } | |
503 | ||
504 | void | |
505 | process_do_stat(int do_lstat) | |
506 | { | |
b5c334cc | 507 | Attrib a; |
b5e300c2 | 508 | struct stat st; |
509 | u_int32_t id; | |
510 | char *name; | |
f546c780 | 511 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 512 | |
513 | id = get_int(); | |
514 | name = get_string(NULL); | |
515 | TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name); | |
516 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); | |
517 | if (ret < 0) { | |
518 | status = errno_to_portable(errno); | |
519 | } else { | |
b5c334cc | 520 | stat_to_attrib(&st, &a); |
521 | send_attrib(id, &a); | |
f546c780 | 522 | status = SSH2_FX_OK; |
b5e300c2 | 523 | } |
f546c780 | 524 | if (status != SSH2_FX_OK) |
b5e300c2 | 525 | send_status(id, status); |
526 | xfree(name); | |
527 | } | |
528 | ||
529 | void | |
530 | process_stat(void) | |
531 | { | |
532 | process_do_stat(0); | |
533 | } | |
534 | ||
535 | void | |
536 | process_lstat(void) | |
537 | { | |
538 | process_do_stat(1); | |
539 | } | |
540 | ||
541 | void | |
542 | process_fstat(void) | |
543 | { | |
b5c334cc | 544 | Attrib a; |
b5e300c2 | 545 | struct stat st; |
546 | u_int32_t id; | |
f546c780 | 547 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 548 | |
549 | id = get_int(); | |
550 | handle = get_handle(); | |
551 | TRACE("fstat id %d handle %d", id, handle); | |
552 | fd = handle_to_fd(handle); | |
553 | if (fd >= 0) { | |
554 | ret = fstat(fd, &st); | |
555 | if (ret < 0) { | |
556 | status = errno_to_portable(errno); | |
557 | } else { | |
b5c334cc | 558 | stat_to_attrib(&st, &a); |
559 | send_attrib(id, &a); | |
f546c780 | 560 | status = SSH2_FX_OK; |
b5e300c2 | 561 | } |
562 | } | |
f546c780 | 563 | if (status != SSH2_FX_OK) |
b5e300c2 | 564 | send_status(id, status); |
565 | } | |
566 | ||
567 | struct timeval * | |
568 | attrib_to_tv(Attrib *a) | |
569 | { | |
570 | static struct timeval tv[2]; | |
dce9bac5 | 571 | |
b5e300c2 | 572 | tv[0].tv_sec = a->atime; |
573 | tv[0].tv_usec = 0; | |
574 | tv[1].tv_sec = a->mtime; | |
575 | tv[1].tv_usec = 0; | |
576 | return tv; | |
577 | } | |
578 | ||
579 | void | |
580 | process_setstat(void) | |
581 | { | |
582 | Attrib *a; | |
583 | u_int32_t id; | |
584 | char *name; | |
585 | int ret; | |
f546c780 | 586 | int status = SSH2_FX_OK; |
b5e300c2 | 587 | |
588 | id = get_int(); | |
589 | name = get_string(NULL); | |
590 | a = get_attrib(); | |
591 | TRACE("setstat id %d name %s", id, name); | |
f546c780 | 592 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
b5e300c2 | 593 | ret = chmod(name, a->perm & 0777); |
594 | if (ret == -1) | |
595 | status = errno_to_portable(errno); | |
596 | } | |
f546c780 | 597 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 598 | ret = utimes(name, attrib_to_tv(a)); |
599 | if (ret == -1) | |
600 | status = errno_to_portable(errno); | |
601 | } | |
408ba72f | 602 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
603 | ret = chown(name, a->uid, a->gid); | |
604 | if (ret == -1) | |
605 | status = errno_to_portable(errno); | |
606 | } | |
b5e300c2 | 607 | send_status(id, status); |
608 | xfree(name); | |
609 | } | |
610 | ||
611 | void | |
612 | process_fsetstat(void) | |
613 | { | |
614 | Attrib *a; | |
615 | u_int32_t id; | |
616 | int handle, fd, ret; | |
f546c780 | 617 | int status = SSH2_FX_OK; |
bcbf86ec | 618 | char *name; |
16e538d4 | 619 | |
b5e300c2 | 620 | id = get_int(); |
621 | handle = get_handle(); | |
622 | a = get_attrib(); | |
623 | TRACE("fsetstat id %d handle %d", id, handle); | |
624 | fd = handle_to_fd(handle); | |
625 | name = handle_to_name(handle); | |
16e538d4 | 626 | if (fd < 0 || name == NULL) { |
f546c780 | 627 | status = SSH2_FX_FAILURE; |
b5e300c2 | 628 | } else { |
f546c780 | 629 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
2fd3c144 | 630 | #ifdef HAVE_FCHMOD |
b5e300c2 | 631 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 632 | #else |
c33f0b36 | 633 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 634 | #endif |
b5e300c2 | 635 | if (ret == -1) |
636 | status = errno_to_portable(errno); | |
637 | } | |
f546c780 | 638 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
b5e300c2 | 639 | #ifdef HAVE_FUTIMES |
640 | ret = futimes(fd, attrib_to_tv(a)); | |
641 | #else | |
642 | ret = utimes(name, attrib_to_tv(a)); | |
643 | #endif | |
644 | if (ret == -1) | |
645 | status = errno_to_portable(errno); | |
646 | } | |
408ba72f | 647 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
01f13020 | 648 | #ifdef HAVE_FCHOWN |
408ba72f | 649 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 650 | #else |
651 | ret = chown(name, a->uid, a->gid); | |
652 | #endif | |
408ba72f | 653 | if (ret == -1) |
654 | status = errno_to_portable(errno); | |
655 | } | |
b5e300c2 | 656 | } |
657 | send_status(id, status); | |
658 | } | |
659 | ||
660 | void | |
661 | process_opendir(void) | |
662 | { | |
663 | DIR *dirp = NULL; | |
664 | char *path; | |
f546c780 | 665 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 666 | u_int32_t id; |
667 | ||
668 | id = get_int(); | |
669 | path = get_string(NULL); | |
670 | TRACE("opendir id %d path %s", id, path); | |
2b87da3b | 671 | dirp = opendir(path); |
b5e300c2 | 672 | if (dirp == NULL) { |
673 | status = errno_to_portable(errno); | |
674 | } else { | |
675 | handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp); | |
676 | if (handle < 0) { | |
677 | closedir(dirp); | |
678 | } else { | |
679 | send_handle(id, handle); | |
f546c780 | 680 | status = SSH2_FX_OK; |
b5e300c2 | 681 | } |
2b87da3b | 682 | |
b5e300c2 | 683 | } |
f546c780 | 684 | if (status != SSH2_FX_OK) |
b5e300c2 | 685 | send_status(id, status); |
686 | xfree(path); | |
687 | } | |
688 | ||
f546c780 | 689 | /* |
b5c334cc | 690 | * drwxr-xr-x 5 markus markus 1024 Jan 13 18:39 .ssh |
f546c780 | 691 | */ |
b5e300c2 | 692 | char * |
693 | ls_file(char *name, struct stat *st) | |
694 | { | |
b5c334cc | 695 | int sz = 0; |
696 | struct passwd *pw; | |
697 | struct group *gr; | |
698 | struct tm *ltime = localtime(&st->st_mtime); | |
699 | char *user, *group; | |
700 | char buf[1024], mode[11+1], tbuf[12+1], ubuf[11+1], gbuf[11+1]; | |
701 | ||
702 | strmode(st->st_mode, mode); | |
703 | if ((pw = getpwuid(st->st_uid)) != NULL) { | |
704 | user = pw->pw_name; | |
705 | } else { | |
706 | snprintf(ubuf, sizeof ubuf, "%d", st->st_uid); | |
707 | user = ubuf; | |
708 | } | |
709 | if ((gr = getgrgid(st->st_gid)) != NULL) { | |
710 | group = gr->gr_name; | |
711 | } else { | |
712 | snprintf(gbuf, sizeof gbuf, "%d", st->st_gid); | |
713 | group = gbuf; | |
714 | } | |
715 | if (ltime != NULL) { | |
716 | if (time(NULL) - st->st_mtime < (365*24*60*60)/2) | |
717 | sz = strftime(tbuf, sizeof tbuf, "%b %e %H:%M", ltime); | |
718 | else | |
719 | sz = strftime(tbuf, sizeof tbuf, "%b %e %Y", ltime); | |
720 | } | |
721 | if (sz == 0) | |
722 | tbuf[0] = '\0'; | |
27df9d4a | 723 | snprintf(buf, sizeof buf, "%s %3d %-8.8s %-8.8s %8llu %s %s", mode, |
490cad94 | 724 | st->st_nlink, user, group, (u_int64_t)st->st_size, tbuf, name); |
b5e300c2 | 725 | return xstrdup(buf); |
726 | } | |
727 | ||
728 | void | |
729 | process_readdir(void) | |
730 | { | |
731 | DIR *dirp; | |
732 | struct dirent *dp; | |
733 | char *path; | |
734 | int handle; | |
735 | u_int32_t id; | |
736 | ||
737 | id = get_int(); | |
738 | handle = get_handle(); | |
739 | TRACE("readdir id %d handle %d", id, handle); | |
740 | dirp = handle_to_dir(handle); | |
741 | path = handle_to_name(handle); | |
742 | if (dirp == NULL || path == NULL) { | |
f546c780 | 743 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 744 | } else { |
b5e300c2 | 745 | struct stat st; |
746 | char pathname[1024]; | |
747 | Stat *stats; | |
748 | int nstats = 10, count = 0, i; | |
749 | stats = xmalloc(nstats * sizeof(Stat)); | |
750 | while ((dp = readdir(dirp)) != NULL) { | |
751 | if (count >= nstats) { | |
752 | nstats *= 2; | |
753 | stats = xrealloc(stats, nstats * sizeof(Stat)); | |
754 | } | |
755 | /* XXX OVERFLOW ? */ | |
756 | snprintf(pathname, sizeof pathname, | |
757 | "%s/%s", path, dp->d_name); | |
758 | if (lstat(pathname, &st) < 0) | |
759 | continue; | |
b5c334cc | 760 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 761 | stats[count].name = xstrdup(dp->d_name); |
762 | stats[count].long_name = ls_file(dp->d_name, &st); | |
763 | count++; | |
764 | /* send up to 100 entries in one message */ | |
b5c334cc | 765 | /* XXX check packet size instead */ |
b5e300c2 | 766 | if (count == 100) |
767 | break; | |
768 | } | |
f546c780 | 769 | if (count > 0) { |
770 | send_names(id, count, stats); | |
771 | for(i = 0; i < count; i++) { | |
772 | xfree(stats[i].name); | |
773 | xfree(stats[i].long_name); | |
774 | } | |
775 | } else { | |
776 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 777 | } |
778 | xfree(stats); | |
779 | } | |
780 | } | |
781 | ||
782 | void | |
783 | process_remove(void) | |
784 | { | |
785 | char *name; | |
786 | u_int32_t id; | |
f546c780 | 787 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 788 | int ret; |
789 | ||
790 | id = get_int(); | |
791 | name = get_string(NULL); | |
792 | TRACE("remove id %d name %s", id, name); | |
67b0facb | 793 | ret = unlink(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_mkdir(void) | |
801 | { | |
802 | Attrib *a; | |
803 | u_int32_t id; | |
804 | char *name; | |
f546c780 | 805 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 806 | |
807 | id = get_int(); | |
808 | name = get_string(NULL); | |
809 | a = get_attrib(); | |
f546c780 | 810 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
811 | a->perm & 0777 : 0777; | |
b5e300c2 | 812 | TRACE("mkdir id %d name %s mode 0%o", id, name, mode); |
813 | ret = mkdir(name, mode); | |
f546c780 | 814 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 815 | send_status(id, status); |
816 | xfree(name); | |
817 | } | |
818 | ||
819 | void | |
820 | process_rmdir(void) | |
821 | { | |
822 | u_int32_t id; | |
823 | char *name; | |
824 | int ret, status; | |
825 | ||
826 | id = get_int(); | |
827 | name = get_string(NULL); | |
828 | TRACE("rmdir id %d name %s", id, name); | |
829 | ret = rmdir(name); | |
f546c780 | 830 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 831 | send_status(id, status); |
832 | xfree(name); | |
833 | } | |
834 | ||
835 | void | |
836 | process_realpath(void) | |
837 | { | |
838 | char resolvedname[MAXPATHLEN]; | |
839 | u_int32_t id; | |
840 | char *path; | |
841 | ||
842 | id = get_int(); | |
843 | path = get_string(NULL); | |
6b523bae | 844 | if (path[0] == '\0') { |
845 | xfree(path); | |
846 | path = xstrdup("."); | |
847 | } | |
b5e300c2 | 848 | TRACE("realpath id %d path %s", id, path); |
849 | if (realpath(path, resolvedname) == NULL) { | |
850 | send_status(id, errno_to_portable(errno)); | |
851 | } else { | |
852 | Stat s; | |
853 | attrib_clear(&s.attrib); | |
854 | s.name = s.long_name = resolvedname; | |
855 | send_names(id, 1, &s); | |
856 | } | |
857 | xfree(path); | |
858 | } | |
859 | ||
860 | void | |
861 | process_rename(void) | |
862 | { | |
863 | u_int32_t id; | |
b5c334cc | 864 | struct stat st; |
b5e300c2 | 865 | char *oldpath, *newpath; |
b5c334cc | 866 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 867 | |
868 | id = get_int(); | |
869 | oldpath = get_string(NULL); | |
870 | newpath = get_string(NULL); | |
871 | TRACE("rename id %d old %s new %s", id, oldpath, newpath); | |
b5c334cc | 872 | /* fail if 'newpath' exists */ |
873 | if (stat(newpath, &st) == -1) { | |
874 | ret = rename(oldpath, newpath); | |
875 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
876 | } | |
b5e300c2 | 877 | send_status(id, status); |
878 | xfree(oldpath); | |
879 | xfree(newpath); | |
880 | } | |
881 | ||
3a7fe5ba | 882 | void |
883 | process_readlink(void) | |
884 | { | |
885 | u_int32_t id; | |
886 | char link[MAXPATHLEN]; | |
887 | char *path; | |
888 | ||
889 | id = get_int(); | |
890 | path = get_string(NULL); | |
891 | TRACE("readlink id %d path %s", id, path); | |
892 | if (readlink(path, link, sizeof(link) - 1) == -1) | |
893 | send_status(id, errno_to_portable(errno)); | |
894 | else { | |
895 | Stat s; | |
896 | ||
897 | link[sizeof(link) - 1] = '\0'; | |
898 | attrib_clear(&s.attrib); | |
899 | s.name = s.long_name = link; | |
900 | send_names(id, 1, &s); | |
901 | } | |
902 | xfree(path); | |
903 | } | |
904 | ||
905 | void | |
906 | process_symlink(void) | |
907 | { | |
908 | u_int32_t id; | |
909 | struct stat st; | |
910 | char *oldpath, *newpath; | |
911 | int ret, status = SSH2_FX_FAILURE; | |
912 | ||
913 | id = get_int(); | |
914 | oldpath = get_string(NULL); | |
915 | newpath = get_string(NULL); | |
916 | TRACE("symlink id %d old %s new %s", id, oldpath, newpath); | |
917 | /* fail if 'newpath' exists */ | |
918 | if (stat(newpath, &st) == -1) { | |
919 | ret = symlink(oldpath, newpath); | |
920 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
921 | } | |
922 | send_status(id, status); | |
923 | xfree(oldpath); | |
924 | xfree(newpath); | |
925 | } | |
926 | ||
f546c780 | 927 | void |
928 | process_extended(void) | |
929 | { | |
930 | u_int32_t id; | |
931 | char *request; | |
932 | ||
933 | id = get_int(); | |
934 | request = get_string(NULL); | |
935 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
936 | xfree(request); | |
937 | } | |
b5e300c2 | 938 | |
939 | /* stolen from ssh-agent */ | |
940 | ||
941 | void | |
942 | process(void) | |
943 | { | |
1e3b8b07 | 944 | u_int msg_len; |
945 | u_int type; | |
946 | u_char *cp; | |
b5e300c2 | 947 | |
948 | if (buffer_len(&iqueue) < 5) | |
949 | return; /* Incomplete message. */ | |
1e3b8b07 | 950 | cp = (u_char *) buffer_ptr(&iqueue); |
b5e300c2 | 951 | msg_len = GET_32BIT(cp); |
952 | if (msg_len > 256 * 1024) { | |
953 | error("bad message "); | |
954 | exit(11); | |
955 | } | |
956 | if (buffer_len(&iqueue) < msg_len + 4) | |
957 | return; | |
958 | buffer_consume(&iqueue, 4); | |
959 | type = buffer_get_char(&iqueue); | |
960 | switch (type) { | |
f546c780 | 961 | case SSH2_FXP_INIT: |
b5e300c2 | 962 | process_init(); |
963 | break; | |
f546c780 | 964 | case SSH2_FXP_OPEN: |
b5e300c2 | 965 | process_open(); |
966 | break; | |
f546c780 | 967 | case SSH2_FXP_CLOSE: |
b5e300c2 | 968 | process_close(); |
969 | break; | |
f546c780 | 970 | case SSH2_FXP_READ: |
b5e300c2 | 971 | process_read(); |
972 | break; | |
f546c780 | 973 | case SSH2_FXP_WRITE: |
b5e300c2 | 974 | process_write(); |
975 | break; | |
f546c780 | 976 | case SSH2_FXP_LSTAT: |
b5e300c2 | 977 | process_lstat(); |
978 | break; | |
f546c780 | 979 | case SSH2_FXP_FSTAT: |
b5e300c2 | 980 | process_fstat(); |
981 | break; | |
f546c780 | 982 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 983 | process_setstat(); |
984 | break; | |
f546c780 | 985 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 986 | process_fsetstat(); |
987 | break; | |
f546c780 | 988 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 989 | process_opendir(); |
990 | break; | |
f546c780 | 991 | case SSH2_FXP_READDIR: |
b5e300c2 | 992 | process_readdir(); |
993 | break; | |
f546c780 | 994 | case SSH2_FXP_REMOVE: |
b5e300c2 | 995 | process_remove(); |
996 | break; | |
f546c780 | 997 | case SSH2_FXP_MKDIR: |
b5e300c2 | 998 | process_mkdir(); |
999 | break; | |
f546c780 | 1000 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1001 | process_rmdir(); |
1002 | break; | |
f546c780 | 1003 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1004 | process_realpath(); |
1005 | break; | |
f546c780 | 1006 | case SSH2_FXP_STAT: |
b5e300c2 | 1007 | process_stat(); |
1008 | break; | |
f546c780 | 1009 | case SSH2_FXP_RENAME: |
b5e300c2 | 1010 | process_rename(); |
1011 | break; | |
3a7fe5ba | 1012 | case SSH2_FXP_READLINK: |
1013 | process_readlink(); | |
1014 | break; | |
1015 | case SSH2_FXP_SYMLINK: | |
1016 | process_symlink(); | |
1017 | break; | |
f546c780 | 1018 | case SSH2_FXP_EXTENDED: |
1019 | process_extended(); | |
1020 | break; | |
b5e300c2 | 1021 | default: |
1022 | error("Unknown message %d", type); | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | int | |
1028 | main(int ac, char **av) | |
1029 | { | |
c8d75031 | 1030 | fd_set *rset, *wset; |
b5e300c2 | 1031 | int in, out, max; |
c8d75031 | 1032 | ssize_t len, olen, set_size; |
b5e300c2 | 1033 | |
61b3a2bc | 1034 | /* XXX should use getopt */ |
1035 | ||
260d427b | 1036 | __progname = get_progname(av[0]); |
b5e300c2 | 1037 | handle_init(); |
1038 | ||
b5c334cc | 1039 | #ifdef DEBUG_SFTP_SERVER |
2b87da3b | 1040 | log_init("sftp-server", SYSLOG_LEVEL_DEBUG1, SYSLOG_FACILITY_AUTH, 0); |
b5c334cc | 1041 | #endif |
f546c780 | 1042 | |
b5e300c2 | 1043 | in = dup(STDIN_FILENO); |
1044 | out = dup(STDOUT_FILENO); | |
1045 | ||
1046 | max = 0; | |
1047 | if (in > max) | |
1048 | max = in; | |
1049 | if (out > max) | |
1050 | max = out; | |
1051 | ||
1052 | buffer_init(&iqueue); | |
1053 | buffer_init(&oqueue); | |
1054 | ||
c8d75031 | 1055 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1056 | rset = (fd_set *)xmalloc(set_size); | |
1057 | wset = (fd_set *)xmalloc(set_size); | |
1058 | ||
b5e300c2 | 1059 | for (;;) { |
c8d75031 | 1060 | memset(rset, 0, set_size); |
1061 | memset(wset, 0, set_size); | |
b5e300c2 | 1062 | |
c8d75031 | 1063 | FD_SET(in, rset); |
b5e300c2 | 1064 | olen = buffer_len(&oqueue); |
1065 | if (olen > 0) | |
c8d75031 | 1066 | FD_SET(out, wset); |
b5e300c2 | 1067 | |
c8d75031 | 1068 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1069 | if (errno == EINTR) |
1070 | continue; | |
1071 | exit(2); | |
1072 | } | |
1073 | ||
1074 | /* copy stdin to iqueue */ | |
c8d75031 | 1075 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1076 | char buf[4*4096]; |
1077 | len = read(in, buf, sizeof buf); | |
1078 | if (len == 0) { | |
1079 | debug("read eof"); | |
1080 | exit(0); | |
1081 | } else if (len < 0) { | |
1082 | error("read error"); | |
1083 | exit(1); | |
1084 | } else { | |
1085 | buffer_append(&iqueue, buf, len); | |
1086 | } | |
1087 | } | |
1088 | /* send oqueue to stdout */ | |
c8d75031 | 1089 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1090 | len = write(out, buffer_ptr(&oqueue), olen); |
1091 | if (len < 0) { | |
1092 | error("write error"); | |
1093 | exit(1); | |
1094 | } else { | |
1095 | buffer_consume(&oqueue, len); | |
1096 | } | |
1097 | } | |
1098 | /* process requests from client */ | |
1099 | process(); | |
1100 | } | |
1101 | } |