4c7f0d61 |
1 | /* |
2 | * psftp.c: front end for PSFTP. |
3 | */ |
4 | |
4a8fc3c4 |
5 | #include <windows.h> |
6 | |
4c7f0d61 |
7 | #include <stdio.h> |
8 | #include <stdlib.h> |
f9e162aa |
9 | #include <stdarg.h> |
4c7f0d61 |
10 | #include <assert.h> |
d92624dc |
11 | #include <limits.h> |
4c7f0d61 |
12 | |
4a8fc3c4 |
13 | #define PUTTY_DO_GLOBALS |
14 | #include "putty.h" |
15 | #include "storage.h" |
16 | #include "ssh.h" |
4c7f0d61 |
17 | #include "sftp.h" |
18 | #include "int64.h" |
19 | |
5471d09a |
20 | /* |
21 | * Since SFTP is a request-response oriented protocol, it requires |
22 | * no buffer management: when we send data, we stop and wait for an |
23 | * acknowledgement _anyway_, and so we can't possibly overfill our |
24 | * send buffer. |
25 | */ |
26 | |
4c7f0d61 |
27 | /* ---------------------------------------------------------------------- |
4c7f0d61 |
28 | * sftp client state. |
29 | */ |
30 | |
31 | char *pwd, *homedir; |
32 | |
33 | /* ---------------------------------------------------------------------- |
34 | * Higher-level helper functions used in commands. |
35 | */ |
36 | |
37 | /* |
f9e162aa |
38 | * Attempt to canonify a pathname starting from the pwd. If |
39 | * canonification fails, at least fall back to returning a _valid_ |
40 | * pathname (though it may be ugly, eg /home/simon/../foobar). |
4c7f0d61 |
41 | */ |
32874aea |
42 | char *canonify(char *name) |
43 | { |
f9e162aa |
44 | char *fullname, *canonname; |
4a8fc3c4 |
45 | |
f9e162aa |
46 | if (name[0] == '/') { |
47 | fullname = dupstr(name); |
48 | } else { |
4a8fc3c4 |
49 | char *slash; |
32874aea |
50 | if (pwd[strlen(pwd) - 1] == '/') |
4a8fc3c4 |
51 | slash = ""; |
52 | else |
53 | slash = "/"; |
54 | fullname = dupcat(pwd, slash, name, NULL); |
f9e162aa |
55 | } |
4a8fc3c4 |
56 | |
57 | canonname = fxp_realpath(fullname); |
58 | |
f9e162aa |
59 | if (canonname) { |
60 | sfree(fullname); |
61 | return canonname; |
50d7e054 |
62 | } else { |
32874aea |
63 | /* |
64 | * Attempt number 2. Some FXP_REALPATH implementations |
65 | * (glibc-based ones, in particular) require the _whole_ |
66 | * path to point to something that exists, whereas others |
67 | * (BSD-based) only require all but the last component to |
68 | * exist. So if the first call failed, we should strip off |
69 | * everything from the last slash onwards and try again, |
70 | * then put the final component back on. |
71 | * |
72 | * Special cases: |
73 | * |
74 | * - if the last component is "/." or "/..", then we don't |
75 | * bother trying this because there's no way it can work. |
76 | * |
77 | * - if the thing actually ends with a "/", we remove it |
78 | * before we start. Except if the string is "/" itself |
79 | * (although I can't see why we'd have got here if so, |
80 | * because surely "/" would have worked the first |
81 | * time?), in which case we don't bother. |
82 | * |
83 | * - if there's no slash in the string at all, give up in |
84 | * confusion (we expect at least one because of the way |
85 | * we constructed the string). |
86 | */ |
87 | |
88 | int i; |
89 | char *returnname; |
90 | |
91 | i = strlen(fullname); |
92 | if (i > 2 && fullname[i - 1] == '/') |
93 | fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */ |
94 | while (i > 0 && fullname[--i] != '/'); |
95 | |
96 | /* |
97 | * Give up on special cases. |
98 | */ |
99 | if (fullname[i] != '/' || /* no slash at all */ |
100 | !strcmp(fullname + i, "/.") || /* ends in /. */ |
101 | !strcmp(fullname + i, "/..") || /* ends in /.. */ |
102 | !strcmp(fullname, "/")) { |
103 | return fullname; |
104 | } |
105 | |
106 | /* |
107 | * Now i points at the slash. Deal with the final special |
108 | * case i==0 (ie the whole path was "/nonexistentfile"). |
109 | */ |
110 | fullname[i] = '\0'; /* separate the string */ |
111 | if (i == 0) { |
112 | canonname = fxp_realpath("/"); |
113 | } else { |
114 | canonname = fxp_realpath(fullname); |
115 | } |
116 | |
117 | if (!canonname) |
118 | return fullname; /* even that failed; give up */ |
119 | |
120 | /* |
121 | * We have a canonical name for all but the last path |
122 | * component. Concatenate the last component and return. |
123 | */ |
124 | returnname = dupcat(canonname, |
125 | canonname[strlen(canonname) - 1] == |
126 | '/' ? "" : "/", fullname + i + 1, NULL); |
127 | sfree(fullname); |
128 | sfree(canonname); |
129 | return returnname; |
50d7e054 |
130 | } |
4c7f0d61 |
131 | } |
132 | |
dcf8495c |
133 | /* |
134 | * Return a pointer to the portion of str that comes after the last |
135 | * slash (or backslash or colon, if `local' is TRUE). |
136 | */ |
137 | static char *stripslashes(char *str, int local) |
138 | { |
139 | char *p; |
140 | |
141 | if (local) { |
142 | p = strchr(str, ':'); |
143 | if (p) str = p+1; |
144 | } |
145 | |
146 | p = strrchr(str, '/'); |
147 | if (p) str = p+1; |
148 | |
149 | if (local) { |
150 | p = strrchr(str, '\\'); |
151 | if (p) str = p+1; |
152 | } |
153 | |
154 | return str; |
155 | } |
156 | |
4c7f0d61 |
157 | /* ---------------------------------------------------------------------- |
158 | * Actual sftp commands. |
159 | */ |
160 | struct sftp_command { |
161 | char **words; |
162 | int nwords, wordssize; |
32874aea |
163 | int (*obey) (struct sftp_command *); /* returns <0 to quit */ |
4c7f0d61 |
164 | }; |
165 | |
32874aea |
166 | int sftp_cmd_null(struct sftp_command *cmd) |
167 | { |
4c7f0d61 |
168 | return 0; |
169 | } |
170 | |
32874aea |
171 | int sftp_cmd_unknown(struct sftp_command *cmd) |
172 | { |
4c7f0d61 |
173 | printf("psftp: unknown command \"%s\"\n", cmd->words[0]); |
174 | return 0; |
175 | } |
176 | |
32874aea |
177 | int sftp_cmd_quit(struct sftp_command *cmd) |
178 | { |
4c7f0d61 |
179 | return -1; |
180 | } |
181 | |
182 | /* |
183 | * List a directory. If no arguments are given, list pwd; otherwise |
184 | * list the directory given in words[1]. |
185 | */ |
32874aea |
186 | static int sftp_ls_compare(const void *av, const void *bv) |
187 | { |
188 | const struct fxp_name *a = (const struct fxp_name *) av; |
189 | const struct fxp_name *b = (const struct fxp_name *) bv; |
4c7f0d61 |
190 | return strcmp(a->filename, b->filename); |
191 | } |
32874aea |
192 | int sftp_cmd_ls(struct sftp_command *cmd) |
193 | { |
4c7f0d61 |
194 | struct fxp_handle *dirh; |
195 | struct fxp_names *names; |
196 | struct fxp_name *ournames; |
197 | int nnames, namesize; |
198 | char *dir, *cdir; |
199 | int i; |
200 | |
201 | if (cmd->nwords < 2) |
202 | dir = "."; |
203 | else |
204 | dir = cmd->words[1]; |
205 | |
206 | cdir = canonify(dir); |
207 | if (!cdir) { |
208 | printf("%s: %s\n", dir, fxp_error()); |
209 | return 0; |
210 | } |
211 | |
212 | printf("Listing directory %s\n", cdir); |
213 | |
214 | dirh = fxp_opendir(cdir); |
215 | if (dirh == NULL) { |
216 | printf("Unable to open %s: %s\n", dir, fxp_error()); |
217 | } else { |
218 | nnames = namesize = 0; |
219 | ournames = NULL; |
220 | |
221 | while (1) { |
222 | |
223 | names = fxp_readdir(dirh); |
224 | if (names == NULL) { |
225 | if (fxp_error_type() == SSH_FX_EOF) |
226 | break; |
227 | printf("Reading directory %s: %s\n", dir, fxp_error()); |
228 | break; |
229 | } |
230 | if (names->nnames == 0) { |
231 | fxp_free_names(names); |
232 | break; |
233 | } |
234 | |
235 | if (nnames + names->nnames >= namesize) { |
236 | namesize += names->nnames + 128; |
32874aea |
237 | ournames = |
238 | srealloc(ournames, namesize * sizeof(*ournames)); |
4c7f0d61 |
239 | } |
240 | |
241 | for (i = 0; i < names->nnames; i++) |
242 | ournames[nnames++] = names->names[i]; |
243 | |
244 | names->nnames = 0; /* prevent free_names */ |
245 | fxp_free_names(names); |
246 | } |
247 | fxp_close(dirh); |
248 | |
249 | /* |
250 | * Now we have our filenames. Sort them by actual file |
251 | * name, and then output the longname parts. |
252 | */ |
253 | qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare); |
254 | |
255 | /* |
256 | * And print them. |
257 | */ |
258 | for (i = 0; i < nnames; i++) |
259 | printf("%s\n", ournames[i].longname); |
260 | } |
261 | |
262 | sfree(cdir); |
263 | |
264 | return 0; |
265 | } |
266 | |
267 | /* |
268 | * Change directories. We do this by canonifying the new name, then |
269 | * trying to OPENDIR it. Only if that succeeds do we set the new pwd. |
270 | */ |
32874aea |
271 | int sftp_cmd_cd(struct sftp_command *cmd) |
272 | { |
4c7f0d61 |
273 | struct fxp_handle *dirh; |
274 | char *dir; |
275 | |
276 | if (cmd->nwords < 2) |
f9e162aa |
277 | dir = dupstr(homedir); |
4c7f0d61 |
278 | else |
279 | dir = canonify(cmd->words[1]); |
280 | |
281 | if (!dir) { |
282 | printf("%s: %s\n", dir, fxp_error()); |
283 | return 0; |
284 | } |
285 | |
286 | dirh = fxp_opendir(dir); |
287 | if (!dirh) { |
288 | printf("Directory %s: %s\n", dir, fxp_error()); |
289 | sfree(dir); |
290 | return 0; |
291 | } |
292 | |
293 | fxp_close(dirh); |
294 | |
295 | sfree(pwd); |
296 | pwd = dir; |
297 | printf("Remote directory is now %s\n", pwd); |
298 | |
299 | return 0; |
300 | } |
301 | |
302 | /* |
4f2b387f |
303 | * Print current directory. Easy as pie. |
304 | */ |
305 | int sftp_cmd_pwd(struct sftp_command *cmd) |
306 | { |
307 | printf("Remote directory is %s\n", pwd); |
308 | return 0; |
309 | } |
310 | |
311 | /* |
d92624dc |
312 | * Get a file and save it at the local end. We have two very |
313 | * similar commands here: `get' and `reget', which differ in that |
314 | * `reget' checks for the existence of the destination file and |
315 | * starts from where a previous aborted transfer left off. |
4c7f0d61 |
316 | */ |
d92624dc |
317 | int sftp_general_get(struct sftp_command *cmd, int restart) |
32874aea |
318 | { |
4c7f0d61 |
319 | struct fxp_handle *fh; |
320 | char *fname, *outfname; |
321 | uint64 offset; |
322 | FILE *fp; |
323 | |
324 | if (cmd->nwords < 2) { |
325 | printf("get: expects a filename\n"); |
326 | return 0; |
327 | } |
328 | |
329 | fname = canonify(cmd->words[1]); |
330 | if (!fname) { |
331 | printf("%s: %s\n", cmd->words[1], fxp_error()); |
332 | return 0; |
333 | } |
dcf8495c |
334 | outfname = (cmd->nwords == 2 ? |
335 | stripslashes(cmd->words[1], 0) : cmd->words[2]); |
4c7f0d61 |
336 | |
337 | fh = fxp_open(fname, SSH_FXF_READ); |
338 | if (!fh) { |
339 | printf("%s: %s\n", fname, fxp_error()); |
340 | sfree(fname); |
341 | return 0; |
342 | } |
d92624dc |
343 | |
344 | if (restart) { |
345 | fp = fopen(outfname, "rb+"); |
346 | } else { |
347 | fp = fopen(outfname, "wb"); |
348 | } |
349 | |
4c7f0d61 |
350 | if (!fp) { |
351 | printf("local: unable to open %s\n", outfname); |
32874aea |
352 | fxp_close(fh); |
4c7f0d61 |
353 | sfree(fname); |
354 | return 0; |
355 | } |
356 | |
d92624dc |
357 | if (restart) { |
358 | long posn; |
359 | fseek(fp, 0L, SEEK_END); |
360 | posn = ftell(fp); |
361 | printf("reget: restarting at file position %ld\n", posn); |
362 | offset = uint64_make(0, posn); |
363 | } else { |
364 | offset = uint64_make(0, 0); |
365 | } |
4c7f0d61 |
366 | |
d92624dc |
367 | printf("remote:%s => local:%s\n", fname, outfname); |
4c7f0d61 |
368 | |
369 | /* |
370 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
371 | * thus put up a progress bar. |
372 | */ |
373 | while (1) { |
374 | char buffer[4096]; |
375 | int len; |
376 | int wpos, wlen; |
377 | |
378 | len = fxp_read(fh, buffer, offset, sizeof(buffer)); |
32874aea |
379 | if ((len == -1 && fxp_error_type() == SSH_FX_EOF) || len == 0) |
4c7f0d61 |
380 | break; |
381 | if (len == -1) { |
382 | printf("error while reading: %s\n", fxp_error()); |
383 | break; |
384 | } |
32874aea |
385 | |
4c7f0d61 |
386 | wpos = 0; |
387 | while (wpos < len) { |
32874aea |
388 | wlen = fwrite(buffer, 1, len - wpos, fp); |
4c7f0d61 |
389 | if (wlen <= 0) { |
390 | printf("error while writing local file\n"); |
391 | break; |
392 | } |
393 | wpos += wlen; |
394 | } |
395 | if (wpos < len) /* we had an error */ |
396 | break; |
397 | offset = uint64_add32(offset, len); |
398 | } |
399 | |
400 | fclose(fp); |
401 | fxp_close(fh); |
402 | sfree(fname); |
403 | |
404 | return 0; |
405 | } |
d92624dc |
406 | int sftp_cmd_get(struct sftp_command *cmd) |
407 | { |
408 | return sftp_general_get(cmd, 0); |
409 | } |
410 | int sftp_cmd_reget(struct sftp_command *cmd) |
411 | { |
412 | return sftp_general_get(cmd, 1); |
413 | } |
4c7f0d61 |
414 | |
415 | /* |
d92624dc |
416 | * Send a file and store it at the remote end. We have two very |
417 | * similar commands here: `put' and `reput', which differ in that |
418 | * `reput' checks for the existence of the destination file and |
419 | * starts from where a previous aborted transfer left off. |
4c7f0d61 |
420 | */ |
d92624dc |
421 | int sftp_general_put(struct sftp_command *cmd, int restart) |
32874aea |
422 | { |
4c7f0d61 |
423 | struct fxp_handle *fh; |
424 | char *fname, *origoutfname, *outfname; |
425 | uint64 offset; |
426 | FILE *fp; |
427 | |
428 | if (cmd->nwords < 2) { |
429 | printf("put: expects a filename\n"); |
430 | return 0; |
431 | } |
432 | |
433 | fname = cmd->words[1]; |
dcf8495c |
434 | origoutfname = (cmd->nwords == 2 ? |
435 | stripslashes(cmd->words[1], 1) : cmd->words[2]); |
4c7f0d61 |
436 | outfname = canonify(origoutfname); |
f9e162aa |
437 | if (!outfname) { |
4c7f0d61 |
438 | printf("%s: %s\n", origoutfname, fxp_error()); |
439 | return 0; |
440 | } |
441 | |
442 | fp = fopen(fname, "rb"); |
443 | if (!fp) { |
444 | printf("local: unable to open %s\n", fname); |
4c7f0d61 |
445 | sfree(outfname); |
446 | return 0; |
447 | } |
d92624dc |
448 | if (restart) { |
449 | fh = fxp_open(outfname, |
450 | SSH_FXF_WRITE); |
451 | } else { |
452 | fh = fxp_open(outfname, |
453 | SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC); |
454 | } |
4c7f0d61 |
455 | if (!fh) { |
456 | printf("%s: %s\n", outfname, fxp_error()); |
457 | sfree(outfname); |
458 | return 0; |
459 | } |
460 | |
d92624dc |
461 | if (restart) { |
462 | char decbuf[30]; |
463 | struct fxp_attrs attrs; |
464 | if (!fxp_fstat(fh, &attrs)) { |
465 | printf("read size of %s: %s\n", outfname, fxp_error()); |
466 | sfree(outfname); |
467 | return 0; |
468 | } |
469 | if (!(attrs.flags & SSH_FILEXFER_ATTR_SIZE)) { |
470 | printf("read size of %s: size was not given\n", outfname); |
471 | sfree(outfname); |
472 | return 0; |
473 | } |
474 | offset = attrs.size; |
475 | uint64_decimal(offset, decbuf); |
476 | printf("reput: restarting at file position %s\n", decbuf); |
477 | if (uint64_compare(offset, uint64_make(0, LONG_MAX)) > 0) { |
478 | printf("reput: remote file is larger than we can deal with\n"); |
479 | sfree(outfname); |
480 | return 0; |
481 | } |
482 | if (fseek(fp, offset.lo, SEEK_SET) != 0) |
483 | fseek(fp, 0, SEEK_END); /* *shrug* */ |
484 | } else { |
485 | offset = uint64_make(0, 0); |
486 | } |
4c7f0d61 |
487 | |
d92624dc |
488 | printf("local:%s => remote:%s\n", fname, outfname); |
4c7f0d61 |
489 | |
490 | /* |
491 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
492 | * thus put up a progress bar. |
493 | */ |
494 | while (1) { |
495 | char buffer[4096]; |
496 | int len; |
497 | |
f9e162aa |
498 | len = fread(buffer, 1, sizeof(buffer), fp); |
4c7f0d61 |
499 | if (len == -1) { |
500 | printf("error while reading local file\n"); |
501 | break; |
502 | } else if (len == 0) { |
503 | break; |
504 | } |
f9e162aa |
505 | if (!fxp_write(fh, buffer, offset, len)) { |
4c7f0d61 |
506 | printf("error while writing: %s\n", fxp_error()); |
507 | break; |
508 | } |
509 | offset = uint64_add32(offset, len); |
510 | } |
511 | |
512 | fxp_close(fh); |
513 | fclose(fp); |
514 | sfree(outfname); |
515 | |
516 | return 0; |
517 | } |
d92624dc |
518 | int sftp_cmd_put(struct sftp_command *cmd) |
519 | { |
520 | return sftp_general_put(cmd, 0); |
521 | } |
522 | int sftp_cmd_reput(struct sftp_command *cmd) |
523 | { |
524 | return sftp_general_put(cmd, 1); |
525 | } |
4c7f0d61 |
526 | |
9954aaa3 |
527 | int sftp_cmd_mkdir(struct sftp_command *cmd) |
528 | { |
529 | char *dir; |
530 | int result; |
531 | |
532 | |
533 | if (cmd->nwords < 2) { |
534 | printf("mkdir: expects a directory\n"); |
535 | return 0; |
536 | } |
537 | |
538 | dir = canonify(cmd->words[1]); |
539 | if (!dir) { |
540 | printf("%s: %s\n", dir, fxp_error()); |
541 | return 0; |
542 | } |
543 | |
544 | result = fxp_mkdir(dir); |
545 | if (!result) { |
546 | printf("mkdir %s: %s\n", dir, fxp_error()); |
547 | sfree(dir); |
548 | return 0; |
549 | } |
550 | |
d92624dc |
551 | sfree(dir); |
552 | return 0; |
9954aaa3 |
553 | } |
554 | |
555 | int sftp_cmd_rmdir(struct sftp_command *cmd) |
556 | { |
557 | char *dir; |
558 | int result; |
559 | |
560 | |
561 | if (cmd->nwords < 2) { |
562 | printf("rmdir: expects a directory\n"); |
563 | return 0; |
564 | } |
565 | |
566 | dir = canonify(cmd->words[1]); |
567 | if (!dir) { |
568 | printf("%s: %s\n", dir, fxp_error()); |
569 | return 0; |
570 | } |
571 | |
572 | result = fxp_rmdir(dir); |
573 | if (!result) { |
574 | printf("rmdir %s: %s\n", dir, fxp_error()); |
575 | sfree(dir); |
576 | return 0; |
577 | } |
578 | |
d92624dc |
579 | sfree(dir); |
580 | return 0; |
9954aaa3 |
581 | } |
582 | |
583 | int sftp_cmd_rm(struct sftp_command *cmd) |
584 | { |
585 | char *fname; |
586 | int result; |
587 | |
9954aaa3 |
588 | if (cmd->nwords < 2) { |
589 | printf("rm: expects a filename\n"); |
590 | return 0; |
591 | } |
592 | |
593 | fname = canonify(cmd->words[1]); |
594 | if (!fname) { |
595 | printf("%s: %s\n", fname, fxp_error()); |
596 | return 0; |
597 | } |
598 | |
d92624dc |
599 | result = fxp_remove(fname); |
9954aaa3 |
600 | if (!result) { |
601 | printf("rm %s: %s\n", fname, fxp_error()); |
602 | sfree(fname); |
603 | return 0; |
604 | } |
605 | |
d92624dc |
606 | sfree(fname); |
607 | return 0; |
608 | |
609 | } |
610 | |
611 | int sftp_cmd_mv(struct sftp_command *cmd) |
612 | { |
613 | char *srcfname, *dstfname; |
614 | int result; |
615 | |
616 | if (cmd->nwords < 3) { |
617 | printf("mv: expects two filenames\n"); |
9954aaa3 |
618 | return 0; |
d92624dc |
619 | } |
620 | srcfname = canonify(cmd->words[1]); |
621 | if (!srcfname) { |
622 | printf("%s: %s\n", srcfname, fxp_error()); |
623 | return 0; |
624 | } |
625 | |
626 | dstfname = canonify(cmd->words[2]); |
627 | if (!dstfname) { |
628 | printf("%s: %s\n", dstfname, fxp_error()); |
629 | return 0; |
630 | } |
9954aaa3 |
631 | |
d92624dc |
632 | result = fxp_rename(srcfname, dstfname); |
633 | if (!result) { |
634 | char const *error = fxp_error(); |
635 | struct fxp_attrs attrs; |
636 | |
637 | /* |
638 | * The move might have failed because dstfname pointed at a |
639 | * directory. We check this possibility now: if dstfname |
640 | * _is_ a directory, we re-attempt the move by appending |
641 | * the basename of srcfname to dstfname. |
642 | */ |
643 | result = fxp_stat(dstfname, &attrs); |
644 | if (result && |
645 | (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) && |
646 | (attrs.permissions & 0040000)) { |
647 | char *p; |
648 | char *newname, *newcanon; |
649 | printf("(destination %s is a directory)\n", dstfname); |
650 | p = srcfname + strlen(srcfname); |
651 | while (p > srcfname && p[-1] != '/') p--; |
652 | newname = dupcat(dstfname, "/", p, NULL); |
653 | newcanon = canonify(newname); |
654 | sfree(newname); |
655 | if (newcanon) { |
656 | sfree(dstfname); |
657 | dstfname = newcanon; |
658 | result = fxp_rename(srcfname, dstfname); |
659 | error = result ? NULL : fxp_error(); |
660 | } |
661 | } |
662 | if (error) { |
663 | printf("mv %s %s: %s\n", srcfname, dstfname, error); |
664 | sfree(srcfname); |
665 | sfree(dstfname); |
666 | return 0; |
667 | } |
668 | } |
669 | printf("%s -> %s\n", srcfname, dstfname); |
670 | |
671 | sfree(srcfname); |
672 | sfree(dstfname); |
673 | return 0; |
9954aaa3 |
674 | } |
675 | |
d92624dc |
676 | int sftp_cmd_chmod(struct sftp_command *cmd) |
677 | { |
678 | char *fname, *mode; |
679 | int result; |
680 | struct fxp_attrs attrs; |
681 | unsigned attrs_clr, attrs_xor, oldperms, newperms; |
682 | |
683 | if (cmd->nwords < 3) { |
684 | printf("chmod: expects a mode specifier and a filename\n"); |
685 | return 0; |
686 | } |
687 | |
688 | /* |
689 | * Attempt to parse the mode specifier in cmd->words[1]. We |
690 | * don't support the full horror of Unix chmod; instead we |
691 | * support a much simpler syntax in which the user can either |
692 | * specify an octal number, or a comma-separated sequence of |
693 | * [ugoa]*[-+=][rwxst]+. (The initial [ugoa] sequence may |
694 | * _only_ be omitted if the only attribute mentioned is t, |
695 | * since all others require a user/group/other specification. |
696 | * Additionally, the s attribute may not be specified for any |
697 | * [ugoa] specifications other than exactly u or exactly g. |
698 | */ |
699 | attrs_clr = attrs_xor = 0; |
700 | mode = cmd->words[1]; |
701 | if (mode[0] >= '0' && mode[0] <= '9') { |
702 | if (mode[strspn(mode, "01234567")]) { |
703 | printf("chmod: numeric file modes should" |
704 | " contain digits 0-7 only\n"); |
705 | return 0; |
706 | } |
707 | attrs_clr = 07777; |
708 | sscanf(mode, "%o", &attrs_xor); |
709 | attrs_xor &= attrs_clr; |
710 | } else { |
711 | while (*mode) { |
712 | char *modebegin = mode; |
713 | unsigned subset, perms; |
714 | int action; |
715 | |
716 | subset = 0; |
717 | while (*mode && *mode != ',' && |
718 | *mode != '+' && *mode != '-' && *mode != '=') { |
719 | switch (*mode) { |
720 | case 'u': subset |= 04700; break; /* setuid, user perms */ |
721 | case 'g': subset |= 02070; break; /* setgid, group perms */ |
722 | case 'o': subset |= 00007; break; /* just other perms */ |
723 | case 'a': subset |= 06777; break; /* all of the above */ |
724 | default: |
725 | printf("chmod: file mode '%.*s' contains unrecognised" |
726 | " user/group/other specifier '%c'\n", |
727 | strcspn(modebegin, ","), modebegin, *mode); |
728 | return 0; |
729 | } |
730 | mode++; |
731 | } |
732 | if (!*mode || *mode == ',') { |
733 | printf("chmod: file mode '%.*s' is incomplete\n", |
734 | strcspn(modebegin, ","), modebegin); |
735 | return 0; |
736 | } |
737 | action = *mode++; |
738 | if (!*mode || *mode == ',') { |
739 | printf("chmod: file mode '%.*s' is incomplete\n", |
740 | strcspn(modebegin, ","), modebegin); |
741 | return 0; |
742 | } |
743 | perms = 0; |
744 | while (*mode && *mode != ',') { |
745 | switch (*mode) { |
746 | case 'r': perms |= 00444; break; |
747 | case 'w': perms |= 00222; break; |
748 | case 'x': perms |= 00111; break; |
749 | case 't': perms |= 01000; subset |= 01000; break; |
750 | case 's': |
751 | if ((subset & 06777) != 04700 && |
752 | (subset & 06777) != 02070) { |
753 | printf("chmod: file mode '%.*s': set[ug]id bit should" |
754 | " be used with exactly one of u or g only\n", |
755 | strcspn(modebegin, ","), modebegin); |
756 | return 0; |
757 | } |
758 | perms |= 06000; |
759 | break; |
760 | default: |
761 | printf("chmod: file mode '%.*s' contains unrecognised" |
762 | " permission specifier '%c'\n", |
763 | strcspn(modebegin, ","), modebegin, *mode); |
764 | return 0; |
765 | } |
766 | mode++; |
767 | } |
768 | if (!(subset & 06777) && (perms &~ subset)) { |
769 | printf("chmod: file mode '%.*s' contains no user/group/other" |
770 | " specifier and permissions other than 't' \n", |
771 | strcspn(modebegin, ","), modebegin, *mode); |
772 | return 0; |
773 | } |
774 | perms &= subset; |
775 | switch (action) { |
776 | case '+': |
777 | attrs_clr |= perms; |
778 | attrs_xor |= perms; |
779 | break; |
780 | case '-': |
781 | attrs_clr |= perms; |
782 | attrs_xor &= ~perms; |
783 | break; |
784 | case '=': |
785 | attrs_clr |= subset; |
786 | attrs_xor |= perms; |
787 | break; |
788 | } |
789 | if (*mode) mode++; /* eat comma */ |
790 | } |
791 | } |
792 | |
793 | fname = canonify(cmd->words[2]); |
794 | if (!fname) { |
795 | printf("%s: %s\n", fname, fxp_error()); |
796 | return 0; |
797 | } |
798 | |
799 | result = fxp_stat(fname, &attrs); |
800 | if (!result || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) { |
801 | printf("get attrs for %s: %s\n", fname, |
802 | result ? "file permissions not provided" : fxp_error()); |
803 | sfree(fname); |
804 | return 0; |
805 | } |
806 | |
807 | attrs.flags = SSH_FILEXFER_ATTR_PERMISSIONS; /* perms _only_ */ |
808 | oldperms = attrs.permissions & 07777; |
809 | attrs.permissions &= ~attrs_clr; |
810 | attrs.permissions ^= attrs_xor; |
811 | newperms = attrs.permissions & 07777; |
812 | |
813 | result = fxp_setstat(fname, attrs); |
814 | |
815 | if (!result) { |
816 | printf("set attrs for %s: %s\n", fname, fxp_error()); |
817 | sfree(fname); |
818 | return 0; |
819 | } |
820 | |
821 | printf("%s: %04o -> %04o\n", fname, oldperms, newperms); |
822 | |
823 | sfree(fname); |
824 | return 0; |
825 | } |
9954aaa3 |
826 | |
bf5240cd |
827 | static int sftp_cmd_help(struct sftp_command *cmd); |
828 | |
4c7f0d61 |
829 | static struct sftp_cmd_lookup { |
830 | char *name; |
bf5240cd |
831 | /* |
832 | * For help purposes, there are two kinds of command: |
833 | * |
834 | * - primary commands, in which `longhelp' is non-NULL. In |
835 | * this case `shorthelp' is descriptive text, and `longhelp' |
836 | * is longer descriptive text intended to be printed after |
837 | * the command name. |
838 | * |
839 | * - alias commands, in which `longhelp' is NULL. In this case |
840 | * `shorthelp' is the name of a primary command, which |
841 | * contains the help that should double up for this command. |
842 | */ |
843 | char *shorthelp; |
844 | char *longhelp; |
32874aea |
845 | int (*obey) (struct sftp_command *); |
4c7f0d61 |
846 | } sftp_lookup[] = { |
847 | /* |
848 | * List of sftp commands. This is binary-searched so it MUST be |
849 | * in ASCII order. |
850 | */ |
32874aea |
851 | { |
bf5240cd |
852 | "bye", "finish your SFTP session", |
853 | "\n" |
854 | " Terminates your SFTP session and quits the PSFTP program.\n", |
855 | sftp_cmd_quit |
856 | }, |
857 | { |
858 | "cd", "change your remote working directory", |
859 | " [ <New working directory> ]\n" |
860 | " Change the remote working directory for your SFTP session.\n" |
861 | " If a new working directory is not supplied, you will be\n" |
862 | " returned to your home directory.\n", |
863 | sftp_cmd_cd |
864 | }, |
865 | { |
866 | "chmod", "change file permissions and modes", |
867 | " ( <octal-digits> | <modifiers> ) <filename>\n" |
868 | " Change the file permissions on a file or directory.\n" |
869 | " <octal-digits> can be any octal Unix permission specifier.\n" |
870 | " Alternatively, <modifiers> can include:\n" |
871 | " u+r make file readable by owning user\n" |
872 | " u+w make file writable by owning user\n" |
873 | " u+x make file executable by owning user\n" |
874 | " u-r make file not readable by owning user\n" |
875 | " [also u-w, u-x]\n" |
876 | " g+r make file readable by members of owning group\n" |
877 | " [also g+w, g+x, g-r, g-w, g-x]\n" |
878 | " o+r make file readable by all other users\n" |
879 | " [also o+w, o+x, o-r, o-w, o-x]\n" |
880 | " a+r make file readable by absolutely everybody\n" |
881 | " [also a+w, a+x, a-r, a-w, a-x]\n" |
882 | " u+s enable the Unix set-user-ID bit\n" |
883 | " u-s disable the Unix set-user-ID bit\n" |
884 | " g+s enable the Unix set-group-ID bit\n" |
885 | " g-s disable the Unix set-group-ID bit\n" |
886 | " +t enable the Unix \"sticky bit\"\n" |
887 | " You can give more than one modifier for the same user (\"g-rwx\"), and\n" |
888 | " more than one user for the same modifier (\"ug+w\"). You can\n" |
889 | " use commas to separate different modifiers (\"u+rwx,g+s\").\n", |
890 | sftp_cmd_chmod |
891 | }, |
892 | { |
893 | "del", "delete a file", |
894 | " <filename>\n" |
895 | " Delete a file.\n", |
896 | sftp_cmd_rm |
897 | }, |
898 | { |
899 | "delete", "delete a file", |
900 | "\n" |
901 | " Delete a file.\n", |
902 | sftp_cmd_rm |
903 | }, |
904 | { |
905 | "dir", "list contents of a remote directory", |
906 | " [ <directory-name> ]\n" |
907 | " List the contents of a specified directory on the server.\n" |
908 | " If <directory-name> is not given, the current working directory\n" |
909 | " will be listed.\n", |
910 | sftp_cmd_ls |
911 | }, |
912 | { |
913 | "exit", "bye", NULL, sftp_cmd_quit |
914 | }, |
915 | { |
916 | "get", "download a file from the server to your local machine", |
917 | " <filename> [ <local-filename> ]\n" |
918 | " Downloads a file on the server and stores it locally under\n" |
919 | " the same name, or under a different one if you supply the\n" |
920 | " argument <local-filename>.\n", |
921 | sftp_cmd_get |
922 | }, |
923 | { |
924 | "help", "give help", |
925 | " [ <command> [ <command> ... ] ]\n" |
926 | " Give general help if no commands are specified.\n" |
927 | " If one or more commands are specified, give specific help on\n" |
928 | " those particular commands.\n", |
929 | sftp_cmd_help |
930 | }, |
931 | { |
932 | "ls", "dir", NULL, |
933 | sftp_cmd_ls |
934 | }, |
935 | { |
936 | "mkdir", "create a directory on the remote server", |
937 | " <directory-name>\n" |
938 | " Creates a directory with the given name on the server.\n", |
939 | sftp_cmd_mkdir |
940 | }, |
941 | { |
942 | "mv", "move or rename a file on the remote server", |
943 | " <source-filename> <destination-filename>\n" |
944 | " Moves or renames the file <source-filename> on the server,\n" |
945 | " so that it is accessible under the name <destination-filename>.\n", |
946 | sftp_cmd_mv |
947 | }, |
948 | { |
949 | "put", "upload a file from your local machine to the server", |
950 | " <filename> [ <remote-filename> ]\n" |
951 | " Uploads a file to the server and stores it there under\n" |
952 | " the same name, or under a different one if you supply the\n" |
953 | " argument <remote-filename>.\n", |
954 | sftp_cmd_put |
955 | }, |
956 | { |
4f2b387f |
957 | "pwd", "print your remote working directory", |
958 | "\n" |
959 | " Print the current remote working directory for your SFTP session.\n", |
960 | sftp_cmd_pwd |
961 | }, |
962 | { |
bf5240cd |
963 | "quit", "bye", NULL, |
964 | sftp_cmd_quit |
965 | }, |
966 | { |
967 | "reget", "continue downloading a file", |
968 | " <filename> [ <local-filename> ]\n" |
969 | " Works exactly like the \"get\" command, but the local file\n" |
970 | " must already exist. The download will begin at the end of the\n" |
971 | " file. This is for resuming a download that was interrupted.\n", |
972 | sftp_cmd_reget |
973 | }, |
974 | { |
975 | "ren", "mv", NULL, |
976 | sftp_cmd_mv |
977 | }, |
978 | { |
979 | "rename", "mv", NULL, |
980 | sftp_cmd_mv |
981 | }, |
982 | { |
983 | "reput", "continue uploading a file", |
984 | " <filename> [ <remote-filename> ]\n" |
985 | " Works exactly like the \"put\" command, but the remote file\n" |
986 | " must already exist. The upload will begin at the end of the\n" |
987 | " file. This is for resuming an upload that was interrupted.\n", |
988 | sftp_cmd_reput |
989 | }, |
990 | { |
991 | "rm", "del", NULL, |
992 | sftp_cmd_rm |
993 | }, |
994 | { |
995 | "rmdir", "remove a directory on the remote server", |
996 | " <directory-name>\n" |
997 | " Removes the directory with the given name on the server.\n" |
998 | " The directory will not be removed unless it is empty.\n", |
999 | sftp_cmd_rmdir |
1000 | } |
1001 | }; |
1002 | |
1003 | const struct sftp_cmd_lookup *lookup_command(char *name) |
1004 | { |
1005 | int i, j, k, cmp; |
1006 | |
1007 | i = -1; |
1008 | j = sizeof(sftp_lookup) / sizeof(*sftp_lookup); |
1009 | while (j - i > 1) { |
1010 | k = (j + i) / 2; |
1011 | cmp = strcmp(name, sftp_lookup[k].name); |
1012 | if (cmp < 0) |
1013 | j = k; |
1014 | else if (cmp > 0) |
1015 | i = k; |
1016 | else { |
1017 | return &sftp_lookup[k]; |
1018 | } |
1019 | } |
1020 | return NULL; |
1021 | } |
1022 | |
1023 | static int sftp_cmd_help(struct sftp_command *cmd) |
1024 | { |
1025 | int i; |
1026 | if (cmd->nwords == 1) { |
1027 | /* |
1028 | * Give short help on each command. |
1029 | */ |
1030 | int maxlen; |
1031 | maxlen = 0; |
1032 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
1033 | int len = strlen(sftp_lookup[i].name); |
1034 | if (maxlen < len) |
1035 | maxlen = len; |
1036 | } |
1037 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
1038 | const struct sftp_cmd_lookup *lookup; |
1039 | lookup = &sftp_lookup[i]; |
1040 | printf("%-*s", maxlen+2, lookup->name); |
1041 | if (lookup->longhelp == NULL) |
1042 | lookup = lookup_command(lookup->shorthelp); |
1043 | printf("%s\n", lookup->shorthelp); |
1044 | } |
1045 | } else { |
1046 | /* |
1047 | * Give long help on specific commands. |
1048 | */ |
1049 | for (i = 1; i < cmd->nwords; i++) { |
1050 | const struct sftp_cmd_lookup *lookup; |
1051 | lookup = lookup_command(cmd->words[i]); |
1052 | if (!lookup) { |
1053 | printf("help: %s: command not found\n", cmd->words[i]); |
1054 | } else { |
1055 | printf("%s", lookup->name); |
1056 | if (lookup->longhelp == NULL) |
1057 | lookup = lookup_command(lookup->shorthelp); |
1058 | printf("%s", lookup->longhelp); |
1059 | } |
1060 | } |
1061 | } |
1062 | return 0; |
1063 | } |
4c7f0d61 |
1064 | |
1065 | /* ---------------------------------------------------------------------- |
1066 | * Command line reading and parsing. |
1067 | */ |
9954aaa3 |
1068 | struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags) |
32874aea |
1069 | { |
4c7f0d61 |
1070 | char *line; |
1071 | int linelen, linesize; |
1072 | struct sftp_command *cmd; |
1073 | char *p, *q, *r; |
1074 | int quoting; |
1075 | |
9954aaa3 |
1076 | if ((mode == 0) || (modeflags & 1)) { |
1077 | printf("psftp> "); |
1078 | } |
4c7f0d61 |
1079 | fflush(stdout); |
1080 | |
1081 | cmd = smalloc(sizeof(struct sftp_command)); |
1082 | cmd->words = NULL; |
1083 | cmd->nwords = 0; |
1084 | cmd->wordssize = 0; |
1085 | |
1086 | line = NULL; |
1087 | linesize = linelen = 0; |
1088 | while (1) { |
1089 | int len; |
1090 | char *ret; |
1091 | |
1092 | linesize += 512; |
1093 | line = srealloc(line, linesize); |
9954aaa3 |
1094 | ret = fgets(line + linelen, linesize - linelen, fp); |
1095 | if (modeflags & 1) { |
1096 | printf("%s", ret); |
1097 | } |
4c7f0d61 |
1098 | |
1099 | if (!ret || (linelen == 0 && line[0] == '\0')) { |
1100 | cmd->obey = sftp_cmd_quit; |
1101 | printf("quit\n"); |
1102 | return cmd; /* eof */ |
1103 | } |
32874aea |
1104 | len = linelen + strlen(line + linelen); |
4c7f0d61 |
1105 | linelen += len; |
32874aea |
1106 | if (line[linelen - 1] == '\n') { |
4c7f0d61 |
1107 | linelen--; |
1108 | line[linelen] = '\0'; |
1109 | break; |
1110 | } |
1111 | } |
1112 | |
1113 | /* |
1114 | * Parse the command line into words. The syntax is: |
1115 | * - double quotes are removed, but cause spaces within to be |
1116 | * treated as non-separating. |
1117 | * - a double-doublequote pair is a literal double quote, inside |
1118 | * _or_ outside quotes. Like this: |
1119 | * |
1120 | * firstword "second word" "this has ""quotes"" in" sodoes""this"" |
1121 | * |
1122 | * becomes |
1123 | * |
1124 | * >firstword< |
1125 | * >second word< |
1126 | * >this has "quotes" in< |
1127 | * >sodoes"this"< |
1128 | */ |
1129 | p = line; |
1130 | while (*p) { |
1131 | /* skip whitespace */ |
32874aea |
1132 | while (*p && (*p == ' ' || *p == '\t')) |
1133 | p++; |
4c7f0d61 |
1134 | /* mark start of word */ |
1135 | q = r = p; /* q sits at start, r writes word */ |
1136 | quoting = 0; |
1137 | while (*p) { |
1138 | if (!quoting && (*p == ' ' || *p == '\t')) |
1139 | break; /* reached end of word */ |
1140 | else if (*p == '"' && p[1] == '"') |
32874aea |
1141 | p += 2, *r++ = '"'; /* a literal quote */ |
4c7f0d61 |
1142 | else if (*p == '"') |
1143 | p++, quoting = !quoting; |
1144 | else |
1145 | *r++ = *p++; |
1146 | } |
32874aea |
1147 | if (*p) |
1148 | p++; /* skip over the whitespace */ |
4c7f0d61 |
1149 | *r = '\0'; |
1150 | if (cmd->nwords >= cmd->wordssize) { |
1151 | cmd->wordssize = cmd->nwords + 16; |
32874aea |
1152 | cmd->words = |
1153 | srealloc(cmd->words, cmd->wordssize * sizeof(char *)); |
4c7f0d61 |
1154 | } |
1155 | cmd->words[cmd->nwords++] = q; |
1156 | } |
1157 | |
1158 | /* |
1159 | * Now parse the first word and assign a function. |
1160 | */ |
1161 | |
1162 | if (cmd->nwords == 0) |
1163 | cmd->obey = sftp_cmd_null; |
1164 | else { |
bf5240cd |
1165 | const struct sftp_cmd_lookup *lookup; |
1166 | lookup = lookup_command(cmd->words[0]); |
1167 | if (!lookup) |
1168 | cmd->obey = sftp_cmd_unknown; |
1169 | else |
1170 | cmd->obey = lookup->obey; |
4c7f0d61 |
1171 | } |
1172 | |
1173 | return cmd; |
1174 | } |
1175 | |
9954aaa3 |
1176 | void do_sftp(int mode, int modeflags, char *batchfile) |
32874aea |
1177 | { |
9954aaa3 |
1178 | FILE *fp; |
1179 | |
4c7f0d61 |
1180 | /* |
1181 | * Do protocol initialisation. |
1182 | */ |
1183 | if (!fxp_init()) { |
1184 | fprintf(stderr, |
32874aea |
1185 | "Fatal: unable to initialise SFTP: %s\n", fxp_error()); |
0d694692 |
1186 | return; |
4c7f0d61 |
1187 | } |
1188 | |
1189 | /* |
1190 | * Find out where our home directory is. |
1191 | */ |
f9e162aa |
1192 | homedir = fxp_realpath("."); |
4c7f0d61 |
1193 | if (!homedir) { |
1194 | fprintf(stderr, |
1195 | "Warning: failed to resolve home directory: %s\n", |
1196 | fxp_error()); |
1197 | homedir = dupstr("."); |
1198 | } else { |
1199 | printf("Remote working directory is %s\n", homedir); |
1200 | } |
1201 | pwd = dupstr(homedir); |
1202 | |
9954aaa3 |
1203 | /* |
1204 | * Batch mode? |
4c7f0d61 |
1205 | */ |
9954aaa3 |
1206 | if (mode == 0) { |
1207 | |
1208 | /* ------------------------------------------------------------------ |
1209 | * Now we're ready to do Real Stuff. |
1210 | */ |
1211 | while (1) { |
1212 | struct sftp_command *cmd; |
1213 | cmd = sftp_getcmd(stdin, 0, 0); |
1214 | if (!cmd) |
1215 | break; |
1216 | if (cmd->obey(cmd) < 0) |
1217 | break; |
bf5240cd |
1218 | } |
9954aaa3 |
1219 | } else { |
1220 | fp = fopen(batchfile, "r"); |
1221 | if (!fp) { |
bf5240cd |
1222 | printf("Fatal: unable to open %s\n", batchfile); |
1223 | return; |
9954aaa3 |
1224 | } |
1225 | while (1) { |
bf5240cd |
1226 | struct sftp_command *cmd; |
1227 | cmd = sftp_getcmd(fp, mode, modeflags); |
1228 | if (!cmd) |
1229 | break; |
1230 | if (cmd->obey(cmd) < 0) |
1231 | break; |
1232 | if (fxp_error() != NULL) { |
1233 | if (!(modeflags & 2)) |
9954aaa3 |
1234 | break; |
bf5240cd |
1235 | } |
9954aaa3 |
1236 | } |
bf5240cd |
1237 | fclose(fp); |
9954aaa3 |
1238 | |
4c7f0d61 |
1239 | } |
4a8fc3c4 |
1240 | } |
4c7f0d61 |
1241 | |
4a8fc3c4 |
1242 | /* ---------------------------------------------------------------------- |
1243 | * Dirty bits: integration with PuTTY. |
1244 | */ |
1245 | |
1246 | static int verbose = 0; |
1247 | |
1248 | void verify_ssh_host_key(char *host, int port, char *keytype, |
32874aea |
1249 | char *keystr, char *fingerprint) |
1250 | { |
4a8fc3c4 |
1251 | int ret; |
d0718310 |
1252 | HANDLE hin; |
1253 | DWORD savemode, i; |
4a8fc3c4 |
1254 | |
1255 | static const char absentmsg[] = |
32874aea |
1256 | "The server's host key is not cached in the registry. You\n" |
1257 | "have no guarantee that the server is the computer you\n" |
1258 | "think it is.\n" |
1259 | "The server's key fingerprint is:\n" |
1260 | "%s\n" |
1261 | "If you trust this host, enter \"y\" to add the key to\n" |
1262 | "PuTTY's cache and carry on connecting.\n" |
d0718310 |
1263 | "If you want to carry on connecting just once, without\n" |
1264 | "adding the key to the cache, enter \"n\".\n" |
1265 | "If you do not trust this host, press Return to abandon the\n" |
1266 | "connection.\n" |
1267 | "Store key in cache? (y/n) "; |
4a8fc3c4 |
1268 | |
1269 | static const char wrongmsg[] = |
32874aea |
1270 | "WARNING - POTENTIAL SECURITY BREACH!\n" |
1271 | "The server's host key does not match the one PuTTY has\n" |
1272 | "cached in the registry. This means that either the\n" |
1273 | "server administrator has changed the host key, or you\n" |
1274 | "have actually connected to another computer pretending\n" |
1275 | "to be the server.\n" |
1276 | "The new key fingerprint is:\n" |
1277 | "%s\n" |
1278 | "If you were expecting this change and trust the new key,\n" |
d0718310 |
1279 | "enter \"y\" to update PuTTY's cache and continue connecting.\n" |
32874aea |
1280 | "If you want to carry on connecting but without updating\n" |
d0718310 |
1281 | "the cache, enter \"n\".\n" |
32874aea |
1282 | "If you want to abandon the connection completely, press\n" |
1283 | "Return to cancel. Pressing Return is the ONLY guaranteed\n" |
1284 | "safe choice.\n" |
1285 | "Update cached key? (y/n, Return cancels connection) "; |
4a8fc3c4 |
1286 | |
1287 | static const char abandoned[] = "Connection abandoned.\n"; |
1288 | |
1289 | char line[32]; |
1290 | |
1291 | /* |
1292 | * Verify the key against the registry. |
1293 | */ |
1294 | ret = verify_host_key(host, port, keytype, keystr); |
1295 | |
32874aea |
1296 | if (ret == 0) /* success - key matched OK */ |
1297 | return; |
d0718310 |
1298 | |
32874aea |
1299 | if (ret == 2) { /* key was different */ |
1300 | fprintf(stderr, wrongmsg, fingerprint); |
d0718310 |
1301 | fflush(stderr); |
4a8fc3c4 |
1302 | } |
32874aea |
1303 | if (ret == 1) { /* key was absent */ |
1304 | fprintf(stderr, absentmsg, fingerprint); |
d0718310 |
1305 | fflush(stderr); |
1306 | } |
1307 | |
1308 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1309 | GetConsoleMode(hin, &savemode); |
1310 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
1311 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
1312 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
1313 | SetConsoleMode(hin, savemode); |
1314 | |
1315 | if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') { |
1316 | if (line[0] == 'y' || line[0] == 'Y') |
32874aea |
1317 | store_host_key(host, port, keytype, keystr); |
d0718310 |
1318 | } else { |
1319 | fprintf(stderr, abandoned); |
1320 | exit(0); |
4a8fc3c4 |
1321 | } |
1322 | } |
1323 | |
1324 | /* |
ca20bfcf |
1325 | * Ask whether the selected cipher is acceptable (since it was |
1326 | * below the configured 'warn' threshold). |
1327 | * cs: 0 = both ways, 1 = client->server, 2 = server->client |
1328 | */ |
1329 | void askcipher(char *ciphername, int cs) |
1330 | { |
1331 | HANDLE hin; |
1332 | DWORD savemode, i; |
1333 | |
1334 | static const char msg[] = |
1335 | "The first %scipher supported by the server is\n" |
1336 | "%s, which is below the configured warning threshold.\n" |
1337 | "Continue with connection? (y/n) "; |
1338 | static const char abandoned[] = "Connection abandoned.\n"; |
1339 | |
1340 | char line[32]; |
1341 | |
1342 | fprintf(stderr, msg, |
1343 | (cs == 0) ? "" : |
1344 | (cs == 1) ? "client-to-server " : |
1345 | "server-to-client ", |
1346 | ciphername); |
1347 | fflush(stderr); |
1348 | |
1349 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1350 | GetConsoleMode(hin, &savemode); |
1351 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
1352 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
1353 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
1354 | SetConsoleMode(hin, savemode); |
1355 | |
1356 | if (line[0] == 'y' || line[0] == 'Y') { |
1357 | return; |
1358 | } else { |
1359 | fprintf(stderr, abandoned); |
1360 | exit(0); |
1361 | } |
1362 | } |
1363 | |
1364 | /* |
4a8fc3c4 |
1365 | * Print an error message and perform a fatal exit. |
1366 | */ |
1367 | void fatalbox(char *fmt, ...) |
1368 | { |
32874aea |
1369 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
1370 | va_list ap; |
1371 | va_start(ap, fmt); |
1372 | strcpy(str, "Fatal:"); |
32874aea |
1373 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
1374 | va_end(ap); |
1375 | strcat(str, "\n"); |
1376 | fprintf(stderr, str); |
1377 | |
1378 | exit(1); |
1379 | } |
1380 | void connection_fatal(char *fmt, ...) |
1381 | { |
32874aea |
1382 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
1383 | va_list ap; |
1384 | va_start(ap, fmt); |
1385 | strcpy(str, "Fatal:"); |
32874aea |
1386 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
1387 | va_end(ap); |
1388 | strcat(str, "\n"); |
1389 | fprintf(stderr, str); |
1390 | |
1391 | exit(1); |
1392 | } |
1393 | |
32874aea |
1394 | void logevent(char *string) |
1395 | { |
1396 | } |
4a8fc3c4 |
1397 | |
760e88b2 |
1398 | void ldisc_send(char *buf, int len, int interactive) |
32874aea |
1399 | { |
4a8fc3c4 |
1400 | /* |
1401 | * This is only here because of the calls to ldisc_send(NULL, |
1402 | * 0) in ssh.c. Nothing in PSFTP actually needs to use the |
1403 | * ldisc as an ldisc. So if we get called with any real data, I |
1404 | * want to know about it. |
4c7f0d61 |
1405 | */ |
4a8fc3c4 |
1406 | assert(len == 0); |
1407 | } |
1408 | |
1409 | /* |
1410 | * Be told what socket we're supposed to be using. |
1411 | */ |
1412 | static SOCKET sftp_ssh_socket; |
32874aea |
1413 | char *do_select(SOCKET skt, int startup) |
1414 | { |
4a8fc3c4 |
1415 | if (startup) |
1416 | sftp_ssh_socket = skt; |
1417 | else |
1418 | sftp_ssh_socket = INVALID_SOCKET; |
1419 | return NULL; |
4c7f0d61 |
1420 | } |
4a8fc3c4 |
1421 | extern int select_result(WPARAM, LPARAM); |
1422 | |
1423 | /* |
1424 | * Receive a block of data from the SSH link. Block until all data |
1425 | * is available. |
1426 | * |
1427 | * To do this, we repeatedly call the SSH protocol module, with our |
1428 | * own trap in from_backend() to catch the data that comes back. We |
1429 | * do this until we have enough data. |
1430 | */ |
1431 | |
32874aea |
1432 | static unsigned char *outptr; /* where to put the data */ |
1433 | static unsigned outlen; /* how much data required */ |
4a8fc3c4 |
1434 | static unsigned char *pending = NULL; /* any spare data */ |
32874aea |
1435 | static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */ |
5471d09a |
1436 | int from_backend(int is_stderr, char *data, int datalen) |
32874aea |
1437 | { |
1438 | unsigned char *p = (unsigned char *) data; |
1439 | unsigned len = (unsigned) datalen; |
4a8fc3c4 |
1440 | |
1441 | /* |
1442 | * stderr data is just spouted to local stderr and otherwise |
1443 | * ignored. |
1444 | */ |
1445 | if (is_stderr) { |
1446 | fwrite(data, 1, len, stderr); |
5471d09a |
1447 | return 0; |
4a8fc3c4 |
1448 | } |
1449 | |
1450 | /* |
1451 | * If this is before the real session begins, just return. |
1452 | */ |
1453 | if (!outptr) |
5471d09a |
1454 | return 0; |
4a8fc3c4 |
1455 | |
1456 | if (outlen > 0) { |
32874aea |
1457 | unsigned used = outlen; |
1458 | if (used > len) |
1459 | used = len; |
1460 | memcpy(outptr, p, used); |
1461 | outptr += used; |
1462 | outlen -= used; |
1463 | p += used; |
1464 | len -= used; |
4a8fc3c4 |
1465 | } |
1466 | |
1467 | if (len > 0) { |
32874aea |
1468 | if (pendsize < pendlen + len) { |
1469 | pendsize = pendlen + len + 4096; |
1470 | pending = (pending ? srealloc(pending, pendsize) : |
1471 | smalloc(pendsize)); |
1472 | if (!pending) |
1473 | fatalbox("Out of memory"); |
1474 | } |
1475 | memcpy(pending + pendlen, p, len); |
1476 | pendlen += len; |
4a8fc3c4 |
1477 | } |
5471d09a |
1478 | |
1479 | return 0; |
4a8fc3c4 |
1480 | } |
32874aea |
1481 | int sftp_recvdata(char *buf, int len) |
1482 | { |
1483 | outptr = (unsigned char *) buf; |
4a8fc3c4 |
1484 | outlen = len; |
1485 | |
1486 | /* |
1487 | * See if the pending-input block contains some of what we |
1488 | * need. |
1489 | */ |
1490 | if (pendlen > 0) { |
32874aea |
1491 | unsigned pendused = pendlen; |
1492 | if (pendused > outlen) |
1493 | pendused = outlen; |
4a8fc3c4 |
1494 | memcpy(outptr, pending, pendused); |
32874aea |
1495 | memmove(pending, pending + pendused, pendlen - pendused); |
4a8fc3c4 |
1496 | outptr += pendused; |
1497 | outlen -= pendused; |
32874aea |
1498 | pendlen -= pendused; |
1499 | if (pendlen == 0) { |
1500 | pendsize = 0; |
1501 | sfree(pending); |
1502 | pending = NULL; |
1503 | } |
1504 | if (outlen == 0) |
1505 | return 1; |
4a8fc3c4 |
1506 | } |
1507 | |
1508 | while (outlen > 0) { |
32874aea |
1509 | fd_set readfds; |
4a8fc3c4 |
1510 | |
32874aea |
1511 | FD_ZERO(&readfds); |
1512 | FD_SET(sftp_ssh_socket, &readfds); |
1513 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
1514 | return 0; /* doom */ |
1515 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
1516 | } |
1517 | |
1518 | return 1; |
1519 | } |
32874aea |
1520 | int sftp_senddata(char *buf, int len) |
1521 | { |
1522 | back->send((unsigned char *) buf, len); |
4a8fc3c4 |
1523 | return 1; |
1524 | } |
1525 | |
1526 | /* |
1527 | * Loop through the ssh connection and authentication process. |
1528 | */ |
32874aea |
1529 | static void ssh_sftp_init(void) |
1530 | { |
4a8fc3c4 |
1531 | if (sftp_ssh_socket == INVALID_SOCKET) |
1532 | return; |
1533 | while (!back->sendok()) { |
32874aea |
1534 | fd_set readfds; |
1535 | FD_ZERO(&readfds); |
1536 | FD_SET(sftp_ssh_socket, &readfds); |
1537 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
1538 | return; /* doom */ |
1539 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
1540 | } |
1541 | } |
1542 | |
1543 | static char *password = NULL; |
fa17a66e |
1544 | static int get_line(const char *prompt, char *str, int maxlen, int is_pw) |
4a8fc3c4 |
1545 | { |
1546 | HANDLE hin, hout; |
fa17a66e |
1547 | DWORD savemode, newmode, i; |
4a8fc3c4 |
1548 | |
1549 | if (password) { |
32874aea |
1550 | static int tried_once = 0; |
1551 | |
1552 | if (tried_once) { |
1553 | return 0; |
1554 | } else { |
1555 | strncpy(str, password, maxlen); |
1556 | str[maxlen - 1] = '\0'; |
1557 | tried_once = 1; |
1558 | return 1; |
1559 | } |
4a8fc3c4 |
1560 | } |
1561 | |
1562 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1563 | hout = GetStdHandle(STD_OUTPUT_HANDLE); |
1564 | if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) { |
1565 | fprintf(stderr, "Cannot get standard input/output handles\n"); |
1566 | exit(1); |
1567 | } |
1568 | |
1569 | GetConsoleMode(hin, &savemode); |
fa17a66e |
1570 | newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT; |
1571 | if (is_pw) |
32874aea |
1572 | newmode &= ~ENABLE_ECHO_INPUT; |
fa17a66e |
1573 | else |
32874aea |
1574 | newmode |= ENABLE_ECHO_INPUT; |
fa17a66e |
1575 | SetConsoleMode(hin, newmode); |
4a8fc3c4 |
1576 | |
1577 | WriteFile(hout, prompt, strlen(prompt), &i, NULL); |
32874aea |
1578 | ReadFile(hin, str, maxlen - 1, &i, NULL); |
4a8fc3c4 |
1579 | |
1580 | SetConsoleMode(hin, savemode); |
1581 | |
32874aea |
1582 | if ((int) i > maxlen) |
1583 | i = maxlen - 1; |
1584 | else |
1585 | i = i - 2; |
4a8fc3c4 |
1586 | str[i] = '\0'; |
1587 | |
fa17a66e |
1588 | if (is_pw) |
32874aea |
1589 | WriteFile(hout, "\r\n", 2, &i, NULL); |
4a8fc3c4 |
1590 | |
1591 | return 1; |
1592 | } |
1593 | |
1594 | /* |
1595 | * Initialize the Win$ock driver. |
1596 | */ |
1597 | static void init_winsock(void) |
1598 | { |
1599 | WORD winsock_ver; |
1600 | WSADATA wsadata; |
1601 | |
1602 | winsock_ver = MAKEWORD(1, 1); |
1603 | if (WSAStartup(winsock_ver, &wsadata)) { |
1604 | fprintf(stderr, "Unable to initialise WinSock"); |
1605 | exit(1); |
1606 | } |
32874aea |
1607 | if (LOBYTE(wsadata.wVersion) != 1 || HIBYTE(wsadata.wVersion) != 1) { |
4a8fc3c4 |
1608 | fprintf(stderr, "WinSock version is incompatible with 1.1"); |
1609 | exit(1); |
1610 | } |
1611 | } |
1612 | |
1613 | /* |
1614 | * Short description of parameters. |
1615 | */ |
1616 | static void usage(void) |
1617 | { |
1618 | printf("PuTTY Secure File Transfer (SFTP) client\n"); |
1619 | printf("%s\n", ver); |
1620 | printf("Usage: psftp [options] user@host\n"); |
1621 | printf("Options:\n"); |
9954aaa3 |
1622 | printf(" -b file use specified batchfile\n"); |
1623 | printf(" -bc output batchfile commands\n"); |
1624 | printf(" -be don't stop batchfile processing if errors\n"); |
4a8fc3c4 |
1625 | printf(" -v show verbose messages\n"); |
1626 | printf(" -P port connect to specified port\n"); |
1627 | printf(" -pw passw login with specified password\n"); |
1628 | exit(1); |
1629 | } |
1630 | |
1631 | /* |
1632 | * Main program. Parse arguments etc. |
1633 | */ |
1634 | int main(int argc, char *argv[]) |
1635 | { |
1636 | int i; |
1637 | int portnumber = 0; |
1638 | char *user, *host, *userhost, *realhost; |
1639 | char *err; |
9954aaa3 |
1640 | int mode = 0; |
1641 | int modeflags = 0; |
1642 | char *batchfile = NULL; |
4a8fc3c4 |
1643 | |
2c23c16a |
1644 | flags = FLAG_STDERR | FLAG_INTERACTIVE; |
fa17a66e |
1645 | ssh_get_line = &get_line; |
4a8fc3c4 |
1646 | init_winsock(); |
1647 | sk_init(); |
1648 | |
1649 | userhost = user = NULL; |
1650 | |
1651 | for (i = 1; i < argc; i++) { |
1652 | if (argv[i][0] != '-') { |
1653 | if (userhost) |
1654 | usage(); |
1655 | else |
1656 | userhost = dupstr(argv[i]); |
1657 | } else if (strcmp(argv[i], "-v") == 0) { |
1658 | verbose = 1, flags |= FLAG_VERBOSE; |
1659 | } else if (strcmp(argv[i], "-h") == 0 || |
1660 | strcmp(argv[i], "-?") == 0) { |
1661 | usage(); |
32874aea |
1662 | } else if (strcmp(argv[i], "-l") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1663 | user = argv[++i]; |
32874aea |
1664 | } else if (strcmp(argv[i], "-P") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1665 | portnumber = atoi(argv[++i]); |
32874aea |
1666 | } else if (strcmp(argv[i], "-pw") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1667 | password = argv[++i]; |
9954aaa3 |
1668 | } else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) { |
1669 | mode = 1; |
1670 | batchfile = argv[++i]; |
1671 | } else if (strcmp(argv[i], "-bc") == 0 && i + 1 < argc) { |
1672 | modeflags = modeflags | 1; |
1673 | } else if (strcmp(argv[i], "-be") == 0 && i + 1 < argc) { |
1674 | modeflags = modeflags | 2; |
4a8fc3c4 |
1675 | } else if (strcmp(argv[i], "--") == 0) { |
1676 | i++; |
1677 | break; |
1678 | } else { |
1679 | usage(); |
1680 | } |
1681 | } |
1682 | argc -= i; |
1683 | argv += i; |
1684 | back = NULL; |
1685 | |
1686 | if (argc > 0 || !userhost) |
1687 | usage(); |
1688 | |
1689 | /* Separate host and username */ |
1690 | host = userhost; |
1691 | host = strrchr(host, '@'); |
1692 | if (host == NULL) { |
1693 | host = userhost; |
1694 | } else { |
1695 | *host++ = '\0'; |
1696 | if (user) { |
32874aea |
1697 | printf("psftp: multiple usernames specified; using \"%s\"\n", |
1698 | user); |
4a8fc3c4 |
1699 | } else |
1700 | user = userhost; |
1701 | } |
1702 | |
1703 | /* Try to load settings for this host */ |
1704 | do_defaults(host, &cfg); |
1705 | if (cfg.host[0] == '\0') { |
1706 | /* No settings for this host; use defaults */ |
32874aea |
1707 | do_defaults(NULL, &cfg); |
1708 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
1709 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
4a8fc3c4 |
1710 | cfg.port = 22; |
1711 | } |
1712 | |
449925a6 |
1713 | /* |
1714 | * Trim leading whitespace off the hostname if it's there. |
1715 | */ |
1716 | { |
1717 | int space = strspn(cfg.host, " \t"); |
1718 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
1719 | } |
1720 | |
1721 | /* See if host is of the form user@host */ |
1722 | if (cfg.host[0] != '\0') { |
1723 | char *atsign = strchr(cfg.host, '@'); |
1724 | /* Make sure we're not overflowing the user field */ |
1725 | if (atsign) { |
1726 | if (atsign - cfg.host < sizeof cfg.username) { |
1727 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
1728 | cfg.username[atsign - cfg.host] = '\0'; |
1729 | } |
1730 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
1731 | } |
1732 | } |
1733 | |
1734 | /* |
1735 | * Trim a colon suffix off the hostname if it's there. |
1736 | */ |
1737 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
1738 | |
4a8fc3c4 |
1739 | /* Set username */ |
1740 | if (user != NULL && user[0] != '\0') { |
32874aea |
1741 | strncpy(cfg.username, user, sizeof(cfg.username) - 1); |
1742 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
4a8fc3c4 |
1743 | } |
1744 | if (!cfg.username[0]) { |
1745 | printf("login as: "); |
1746 | if (!fgets(cfg.username, sizeof(cfg.username), stdin)) { |
1747 | fprintf(stderr, "psftp: aborting\n"); |
1748 | exit(1); |
1749 | } else { |
1750 | int len = strlen(cfg.username); |
32874aea |
1751 | if (cfg.username[len - 1] == '\n') |
1752 | cfg.username[len - 1] = '\0'; |
4a8fc3c4 |
1753 | } |
1754 | } |
1755 | |
1756 | if (cfg.protocol != PROT_SSH) |
1757 | cfg.port = 22; |
1758 | |
1759 | if (portnumber) |
1760 | cfg.port = portnumber; |
1761 | |
1762 | /* SFTP uses SSH2 by default always */ |
1763 | cfg.sshprot = 2; |
1764 | |
d27b4a18 |
1765 | /* |
1766 | * Disable scary things which shouldn't be enabled for simple |
1767 | * things like SCP and SFTP: agent forwarding, port forwarding, |
1768 | * X forwarding. |
1769 | */ |
1770 | cfg.x11_forward = 0; |
1771 | cfg.agentfwd = 0; |
1772 | cfg.portfwd[0] = cfg.portfwd[1] = '\0'; |
1773 | |
bebf22d0 |
1774 | /* Set up subsystem name. */ |
4a8fc3c4 |
1775 | strcpy(cfg.remote_cmd, "sftp"); |
1776 | cfg.ssh_subsys = TRUE; |
1777 | cfg.nopty = TRUE; |
1778 | |
bebf22d0 |
1779 | /* |
1780 | * Set up fallback option, for SSH1 servers or servers with the |
1781 | * sftp subsystem not enabled but the server binary installed |
1782 | * in the usual place. We only support fallback on Unix |
248c0c5a |
1783 | * systems, and we use a kludgy piece of shellery which should |
1784 | * try to find sftp-server in various places (the obvious |
1785 | * systemwide spots /usr/lib and /usr/local/lib, and then the |
1786 | * user's PATH) and finally give up. |
bebf22d0 |
1787 | * |
248c0c5a |
1788 | * test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server |
1789 | * test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server |
1790 | * exec sftp-server |
bebf22d0 |
1791 | * |
1792 | * the idea being that this will attempt to use either of the |
1793 | * obvious pathnames and then give up, and when it does give up |
1794 | * it will print the preferred pathname in the error messages. |
1795 | */ |
1796 | cfg.remote_cmd_ptr2 = |
248c0c5a |
1797 | "test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\n" |
1798 | "test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\n" |
1799 | "exec sftp-server"; |
bebf22d0 |
1800 | cfg.ssh_subsys2 = FALSE; |
1801 | |
4a8fc3c4 |
1802 | back = &ssh_backend; |
1803 | |
1804 | err = back->init(cfg.host, cfg.port, &realhost); |
1805 | if (err != NULL) { |
1806 | fprintf(stderr, "ssh_init: %s", err); |
1807 | return 1; |
1808 | } |
1809 | ssh_sftp_init(); |
1810 | if (verbose && realhost != NULL) |
1811 | printf("Connected to %s\n", realhost); |
4c7f0d61 |
1812 | |
9954aaa3 |
1813 | do_sftp(mode, modeflags, batchfile); |
4a8fc3c4 |
1814 | |
1815 | if (back != NULL && back->socket() != NULL) { |
1816 | char ch; |
1817 | back->special(TS_EOF); |
1818 | sftp_recvdata(&ch, 1); |
1819 | } |
1820 | WSACleanup(); |
1821 | random_save_seed(); |
1822 | |
4c7f0d61 |
1823 | return 0; |
1824 | } |