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> |
4c7f0d61 |
11 | |
4a8fc3c4 |
12 | #define PUTTY_DO_GLOBALS |
13 | #include "putty.h" |
14 | #include "storage.h" |
15 | #include "ssh.h" |
4c7f0d61 |
16 | #include "sftp.h" |
17 | #include "int64.h" |
18 | |
4c7f0d61 |
19 | /* ---------------------------------------------------------------------- |
20 | * String handling routines. |
21 | */ |
22 | |
32874aea |
23 | char *dupstr(char *s) |
24 | { |
4c7f0d61 |
25 | int len = strlen(s); |
32874aea |
26 | char *p = smalloc(len + 1); |
4c7f0d61 |
27 | strcpy(p, s); |
28 | return p; |
29 | } |
30 | |
f9e162aa |
31 | /* Allocate the concatenation of N strings. Terminate arg list with NULL. */ |
32874aea |
32 | char *dupcat(char *s1, ...) |
33 | { |
f9e162aa |
34 | int len; |
35 | char *p, *q, *sn; |
36 | va_list ap; |
37 | |
38 | len = strlen(s1); |
39 | va_start(ap, s1); |
40 | while (1) { |
41 | sn = va_arg(ap, char *); |
42 | if (!sn) |
43 | break; |
44 | len += strlen(sn); |
45 | } |
46 | va_end(ap); |
47 | |
32874aea |
48 | p = smalloc(len + 1); |
f9e162aa |
49 | strcpy(p, s1); |
50 | q = p + strlen(p); |
51 | |
52 | va_start(ap, s1); |
53 | while (1) { |
54 | sn = va_arg(ap, char *); |
55 | if (!sn) |
56 | break; |
57 | strcpy(q, sn); |
58 | q += strlen(q); |
59 | } |
60 | va_end(ap); |
61 | |
62 | return p; |
63 | } |
64 | |
4c7f0d61 |
65 | /* ---------------------------------------------------------------------- |
66 | * sftp client state. |
67 | */ |
68 | |
69 | char *pwd, *homedir; |
70 | |
71 | /* ---------------------------------------------------------------------- |
72 | * Higher-level helper functions used in commands. |
73 | */ |
74 | |
75 | /* |
f9e162aa |
76 | * Attempt to canonify a pathname starting from the pwd. If |
77 | * canonification fails, at least fall back to returning a _valid_ |
78 | * pathname (though it may be ugly, eg /home/simon/../foobar). |
4c7f0d61 |
79 | */ |
32874aea |
80 | char *canonify(char *name) |
81 | { |
f9e162aa |
82 | char *fullname, *canonname; |
4a8fc3c4 |
83 | |
f9e162aa |
84 | if (name[0] == '/') { |
85 | fullname = dupstr(name); |
86 | } else { |
4a8fc3c4 |
87 | char *slash; |
32874aea |
88 | if (pwd[strlen(pwd) - 1] == '/') |
4a8fc3c4 |
89 | slash = ""; |
90 | else |
91 | slash = "/"; |
92 | fullname = dupcat(pwd, slash, name, NULL); |
f9e162aa |
93 | } |
4a8fc3c4 |
94 | |
95 | canonname = fxp_realpath(fullname); |
96 | |
f9e162aa |
97 | if (canonname) { |
98 | sfree(fullname); |
99 | return canonname; |
50d7e054 |
100 | } else { |
32874aea |
101 | /* |
102 | * Attempt number 2. Some FXP_REALPATH implementations |
103 | * (glibc-based ones, in particular) require the _whole_ |
104 | * path to point to something that exists, whereas others |
105 | * (BSD-based) only require all but the last component to |
106 | * exist. So if the first call failed, we should strip off |
107 | * everything from the last slash onwards and try again, |
108 | * then put the final component back on. |
109 | * |
110 | * Special cases: |
111 | * |
112 | * - if the last component is "/." or "/..", then we don't |
113 | * bother trying this because there's no way it can work. |
114 | * |
115 | * - if the thing actually ends with a "/", we remove it |
116 | * before we start. Except if the string is "/" itself |
117 | * (although I can't see why we'd have got here if so, |
118 | * because surely "/" would have worked the first |
119 | * time?), in which case we don't bother. |
120 | * |
121 | * - if there's no slash in the string at all, give up in |
122 | * confusion (we expect at least one because of the way |
123 | * we constructed the string). |
124 | */ |
125 | |
126 | int i; |
127 | char *returnname; |
128 | |
129 | i = strlen(fullname); |
130 | if (i > 2 && fullname[i - 1] == '/') |
131 | fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */ |
132 | while (i > 0 && fullname[--i] != '/'); |
133 | |
134 | /* |
135 | * Give up on special cases. |
136 | */ |
137 | if (fullname[i] != '/' || /* no slash at all */ |
138 | !strcmp(fullname + i, "/.") || /* ends in /. */ |
139 | !strcmp(fullname + i, "/..") || /* ends in /.. */ |
140 | !strcmp(fullname, "/")) { |
141 | return fullname; |
142 | } |
143 | |
144 | /* |
145 | * Now i points at the slash. Deal with the final special |
146 | * case i==0 (ie the whole path was "/nonexistentfile"). |
147 | */ |
148 | fullname[i] = '\0'; /* separate the string */ |
149 | if (i == 0) { |
150 | canonname = fxp_realpath("/"); |
151 | } else { |
152 | canonname = fxp_realpath(fullname); |
153 | } |
154 | |
155 | if (!canonname) |
156 | return fullname; /* even that failed; give up */ |
157 | |
158 | /* |
159 | * We have a canonical name for all but the last path |
160 | * component. Concatenate the last component and return. |
161 | */ |
162 | returnname = dupcat(canonname, |
163 | canonname[strlen(canonname) - 1] == |
164 | '/' ? "" : "/", fullname + i + 1, NULL); |
165 | sfree(fullname); |
166 | sfree(canonname); |
167 | return returnname; |
50d7e054 |
168 | } |
4c7f0d61 |
169 | } |
170 | |
171 | /* ---------------------------------------------------------------------- |
172 | * Actual sftp commands. |
173 | */ |
174 | struct sftp_command { |
175 | char **words; |
176 | int nwords, wordssize; |
32874aea |
177 | int (*obey) (struct sftp_command *); /* returns <0 to quit */ |
4c7f0d61 |
178 | }; |
179 | |
32874aea |
180 | int sftp_cmd_null(struct sftp_command *cmd) |
181 | { |
4c7f0d61 |
182 | return 0; |
183 | } |
184 | |
32874aea |
185 | int sftp_cmd_unknown(struct sftp_command *cmd) |
186 | { |
4c7f0d61 |
187 | printf("psftp: unknown command \"%s\"\n", cmd->words[0]); |
188 | return 0; |
189 | } |
190 | |
32874aea |
191 | int sftp_cmd_quit(struct sftp_command *cmd) |
192 | { |
4c7f0d61 |
193 | return -1; |
194 | } |
195 | |
196 | /* |
197 | * List a directory. If no arguments are given, list pwd; otherwise |
198 | * list the directory given in words[1]. |
199 | */ |
32874aea |
200 | static int sftp_ls_compare(const void *av, const void *bv) |
201 | { |
202 | const struct fxp_name *a = (const struct fxp_name *) av; |
203 | const struct fxp_name *b = (const struct fxp_name *) bv; |
4c7f0d61 |
204 | return strcmp(a->filename, b->filename); |
205 | } |
32874aea |
206 | int sftp_cmd_ls(struct sftp_command *cmd) |
207 | { |
4c7f0d61 |
208 | struct fxp_handle *dirh; |
209 | struct fxp_names *names; |
210 | struct fxp_name *ournames; |
211 | int nnames, namesize; |
212 | char *dir, *cdir; |
213 | int i; |
214 | |
215 | if (cmd->nwords < 2) |
216 | dir = "."; |
217 | else |
218 | dir = cmd->words[1]; |
219 | |
220 | cdir = canonify(dir); |
221 | if (!cdir) { |
222 | printf("%s: %s\n", dir, fxp_error()); |
223 | return 0; |
224 | } |
225 | |
226 | printf("Listing directory %s\n", cdir); |
227 | |
228 | dirh = fxp_opendir(cdir); |
229 | if (dirh == NULL) { |
230 | printf("Unable to open %s: %s\n", dir, fxp_error()); |
231 | } else { |
232 | nnames = namesize = 0; |
233 | ournames = NULL; |
234 | |
235 | while (1) { |
236 | |
237 | names = fxp_readdir(dirh); |
238 | if (names == NULL) { |
239 | if (fxp_error_type() == SSH_FX_EOF) |
240 | break; |
241 | printf("Reading directory %s: %s\n", dir, fxp_error()); |
242 | break; |
243 | } |
244 | if (names->nnames == 0) { |
245 | fxp_free_names(names); |
246 | break; |
247 | } |
248 | |
249 | if (nnames + names->nnames >= namesize) { |
250 | namesize += names->nnames + 128; |
32874aea |
251 | ournames = |
252 | srealloc(ournames, namesize * sizeof(*ournames)); |
4c7f0d61 |
253 | } |
254 | |
255 | for (i = 0; i < names->nnames; i++) |
256 | ournames[nnames++] = names->names[i]; |
257 | |
258 | names->nnames = 0; /* prevent free_names */ |
259 | fxp_free_names(names); |
260 | } |
261 | fxp_close(dirh); |
262 | |
263 | /* |
264 | * Now we have our filenames. Sort them by actual file |
265 | * name, and then output the longname parts. |
266 | */ |
267 | qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare); |
268 | |
269 | /* |
270 | * And print them. |
271 | */ |
272 | for (i = 0; i < nnames; i++) |
273 | printf("%s\n", ournames[i].longname); |
274 | } |
275 | |
276 | sfree(cdir); |
277 | |
278 | return 0; |
279 | } |
280 | |
281 | /* |
282 | * Change directories. We do this by canonifying the new name, then |
283 | * trying to OPENDIR it. Only if that succeeds do we set the new pwd. |
284 | */ |
32874aea |
285 | int sftp_cmd_cd(struct sftp_command *cmd) |
286 | { |
4c7f0d61 |
287 | struct fxp_handle *dirh; |
288 | char *dir; |
289 | |
290 | if (cmd->nwords < 2) |
f9e162aa |
291 | dir = dupstr(homedir); |
4c7f0d61 |
292 | else |
293 | dir = canonify(cmd->words[1]); |
294 | |
295 | if (!dir) { |
296 | printf("%s: %s\n", dir, fxp_error()); |
297 | return 0; |
298 | } |
299 | |
300 | dirh = fxp_opendir(dir); |
301 | if (!dirh) { |
302 | printf("Directory %s: %s\n", dir, fxp_error()); |
303 | sfree(dir); |
304 | return 0; |
305 | } |
306 | |
307 | fxp_close(dirh); |
308 | |
309 | sfree(pwd); |
310 | pwd = dir; |
311 | printf("Remote directory is now %s\n", pwd); |
312 | |
313 | return 0; |
314 | } |
315 | |
316 | /* |
317 | * Get a file and save it at the local end. |
318 | */ |
32874aea |
319 | int sftp_cmd_get(struct sftp_command *cmd) |
320 | { |
4c7f0d61 |
321 | struct fxp_handle *fh; |
322 | char *fname, *outfname; |
323 | uint64 offset; |
324 | FILE *fp; |
325 | |
326 | if (cmd->nwords < 2) { |
327 | printf("get: expects a filename\n"); |
328 | return 0; |
329 | } |
330 | |
331 | fname = canonify(cmd->words[1]); |
332 | if (!fname) { |
333 | printf("%s: %s\n", cmd->words[1], fxp_error()); |
334 | return 0; |
335 | } |
336 | outfname = (cmd->nwords == 2 ? cmd->words[1] : cmd->words[2]); |
337 | |
338 | fh = fxp_open(fname, SSH_FXF_READ); |
339 | if (!fh) { |
340 | printf("%s: %s\n", fname, fxp_error()); |
341 | sfree(fname); |
342 | return 0; |
343 | } |
344 | fp = fopen(outfname, "wb"); |
345 | if (!fp) { |
346 | printf("local: unable to open %s\n", outfname); |
32874aea |
347 | fxp_close(fh); |
4c7f0d61 |
348 | sfree(fname); |
349 | return 0; |
350 | } |
351 | |
352 | printf("remote:%s => local:%s\n", fname, outfname); |
353 | |
32874aea |
354 | offset = uint64_make(0, 0); |
4c7f0d61 |
355 | |
356 | /* |
357 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
358 | * thus put up a progress bar. |
359 | */ |
360 | while (1) { |
361 | char buffer[4096]; |
362 | int len; |
363 | int wpos, wlen; |
364 | |
365 | len = fxp_read(fh, buffer, offset, sizeof(buffer)); |
32874aea |
366 | if ((len == -1 && fxp_error_type() == SSH_FX_EOF) || len == 0) |
4c7f0d61 |
367 | break; |
368 | if (len == -1) { |
369 | printf("error while reading: %s\n", fxp_error()); |
370 | break; |
371 | } |
32874aea |
372 | |
4c7f0d61 |
373 | wpos = 0; |
374 | while (wpos < len) { |
32874aea |
375 | wlen = fwrite(buffer, 1, len - wpos, fp); |
4c7f0d61 |
376 | if (wlen <= 0) { |
377 | printf("error while writing local file\n"); |
378 | break; |
379 | } |
380 | wpos += wlen; |
381 | } |
382 | if (wpos < len) /* we had an error */ |
383 | break; |
384 | offset = uint64_add32(offset, len); |
385 | } |
386 | |
387 | fclose(fp); |
388 | fxp_close(fh); |
389 | sfree(fname); |
390 | |
391 | return 0; |
392 | } |
393 | |
394 | /* |
395 | * Send a file and store it at the remote end. |
396 | */ |
32874aea |
397 | int sftp_cmd_put(struct sftp_command *cmd) |
398 | { |
4c7f0d61 |
399 | struct fxp_handle *fh; |
400 | char *fname, *origoutfname, *outfname; |
401 | uint64 offset; |
402 | FILE *fp; |
403 | |
404 | if (cmd->nwords < 2) { |
405 | printf("put: expects a filename\n"); |
406 | return 0; |
407 | } |
408 | |
409 | fname = cmd->words[1]; |
410 | origoutfname = (cmd->nwords == 2 ? cmd->words[1] : cmd->words[2]); |
411 | outfname = canonify(origoutfname); |
f9e162aa |
412 | if (!outfname) { |
4c7f0d61 |
413 | printf("%s: %s\n", origoutfname, fxp_error()); |
414 | return 0; |
415 | } |
416 | |
417 | fp = fopen(fname, "rb"); |
418 | if (!fp) { |
419 | printf("local: unable to open %s\n", fname); |
4c7f0d61 |
420 | sfree(outfname); |
421 | return 0; |
422 | } |
423 | fh = fxp_open(outfname, SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC); |
424 | if (!fh) { |
425 | printf("%s: %s\n", outfname, fxp_error()); |
426 | sfree(outfname); |
427 | return 0; |
428 | } |
429 | |
430 | printf("local:%s => remote:%s\n", fname, outfname); |
431 | |
32874aea |
432 | offset = uint64_make(0, 0); |
4c7f0d61 |
433 | |
434 | /* |
435 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
436 | * thus put up a progress bar. |
437 | */ |
438 | while (1) { |
439 | char buffer[4096]; |
440 | int len; |
441 | |
f9e162aa |
442 | len = fread(buffer, 1, sizeof(buffer), fp); |
4c7f0d61 |
443 | if (len == -1) { |
444 | printf("error while reading local file\n"); |
445 | break; |
446 | } else if (len == 0) { |
447 | break; |
448 | } |
f9e162aa |
449 | if (!fxp_write(fh, buffer, offset, len)) { |
4c7f0d61 |
450 | printf("error while writing: %s\n", fxp_error()); |
451 | break; |
452 | } |
453 | offset = uint64_add32(offset, len); |
454 | } |
455 | |
456 | fxp_close(fh); |
457 | fclose(fp); |
458 | sfree(outfname); |
459 | |
460 | return 0; |
461 | } |
462 | |
9954aaa3 |
463 | int sftp_cmd_mkdir(struct sftp_command *cmd) |
464 | { |
465 | char *dir; |
466 | int result; |
467 | |
468 | |
469 | if (cmd->nwords < 2) { |
470 | printf("mkdir: expects a directory\n"); |
471 | return 0; |
472 | } |
473 | |
474 | dir = canonify(cmd->words[1]); |
475 | if (!dir) { |
476 | printf("%s: %s\n", dir, fxp_error()); |
477 | return 0; |
478 | } |
479 | |
480 | result = fxp_mkdir(dir); |
481 | if (!result) { |
482 | printf("mkdir %s: %s\n", dir, fxp_error()); |
483 | sfree(dir); |
484 | return 0; |
485 | } |
486 | |
487 | sfree(dir); |
488 | return 0; |
489 | |
490 | } |
491 | |
492 | int sftp_cmd_rmdir(struct sftp_command *cmd) |
493 | { |
494 | char *dir; |
495 | int result; |
496 | |
497 | |
498 | if (cmd->nwords < 2) { |
499 | printf("rmdir: expects a directory\n"); |
500 | return 0; |
501 | } |
502 | |
503 | dir = canonify(cmd->words[1]); |
504 | if (!dir) { |
505 | printf("%s: %s\n", dir, fxp_error()); |
506 | return 0; |
507 | } |
508 | |
509 | result = fxp_rmdir(dir); |
510 | if (!result) { |
511 | printf("rmdir %s: %s\n", dir, fxp_error()); |
512 | sfree(dir); |
513 | return 0; |
514 | } |
515 | |
516 | sfree(dir); |
517 | return 0; |
518 | |
519 | } |
520 | |
521 | int sftp_cmd_rm(struct sftp_command *cmd) |
522 | { |
523 | char *fname; |
524 | int result; |
525 | |
526 | |
527 | if (cmd->nwords < 2) { |
528 | printf("rm: expects a filename\n"); |
529 | return 0; |
530 | } |
531 | |
532 | fname = canonify(cmd->words[1]); |
533 | if (!fname) { |
534 | printf("%s: %s\n", fname, fxp_error()); |
535 | return 0; |
536 | } |
537 | |
538 | result = fxp_rm(fname); |
539 | if (!result) { |
540 | printf("rm %s: %s\n", fname, fxp_error()); |
541 | sfree(fname); |
542 | return 0; |
543 | } |
544 | |
545 | sfree(fname); |
546 | return 0; |
547 | |
548 | } |
549 | |
550 | |
4c7f0d61 |
551 | static struct sftp_cmd_lookup { |
552 | char *name; |
32874aea |
553 | int (*obey) (struct sftp_command *); |
4c7f0d61 |
554 | } sftp_lookup[] = { |
555 | /* |
556 | * List of sftp commands. This is binary-searched so it MUST be |
557 | * in ASCII order. |
558 | */ |
32874aea |
559 | { |
560 | "bye", sftp_cmd_quit}, { |
561 | "cd", sftp_cmd_cd}, { |
562 | "dir", sftp_cmd_ls}, { |
563 | "exit", sftp_cmd_quit}, { |
564 | "get", sftp_cmd_get}, { |
565 | "ls", sftp_cmd_ls}, { |
9954aaa3 |
566 | "mkdir", sftp_cmd_mkdir}, { |
32874aea |
567 | "put", sftp_cmd_put}, { |
9954aaa3 |
568 | "quit", sftp_cmd_quit}, { |
569 | "rm", sftp_cmd_rm}, { |
570 | "rmdir", sftp_cmd_rmdir},}; |
4c7f0d61 |
571 | |
572 | /* ---------------------------------------------------------------------- |
573 | * Command line reading and parsing. |
574 | */ |
9954aaa3 |
575 | struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags) |
32874aea |
576 | { |
4c7f0d61 |
577 | char *line; |
578 | int linelen, linesize; |
579 | struct sftp_command *cmd; |
580 | char *p, *q, *r; |
581 | int quoting; |
582 | |
9954aaa3 |
583 | if ((mode == 0) || (modeflags & 1)) { |
584 | printf("psftp> "); |
585 | } |
4c7f0d61 |
586 | fflush(stdout); |
587 | |
588 | cmd = smalloc(sizeof(struct sftp_command)); |
589 | cmd->words = NULL; |
590 | cmd->nwords = 0; |
591 | cmd->wordssize = 0; |
592 | |
593 | line = NULL; |
594 | linesize = linelen = 0; |
595 | while (1) { |
596 | int len; |
597 | char *ret; |
598 | |
599 | linesize += 512; |
600 | line = srealloc(line, linesize); |
9954aaa3 |
601 | ret = fgets(line + linelen, linesize - linelen, fp); |
602 | if (modeflags & 1) { |
603 | printf("%s", ret); |
604 | } |
4c7f0d61 |
605 | |
606 | if (!ret || (linelen == 0 && line[0] == '\0')) { |
607 | cmd->obey = sftp_cmd_quit; |
608 | printf("quit\n"); |
609 | return cmd; /* eof */ |
610 | } |
32874aea |
611 | len = linelen + strlen(line + linelen); |
4c7f0d61 |
612 | linelen += len; |
32874aea |
613 | if (line[linelen - 1] == '\n') { |
4c7f0d61 |
614 | linelen--; |
615 | line[linelen] = '\0'; |
616 | break; |
617 | } |
618 | } |
619 | |
620 | /* |
621 | * Parse the command line into words. The syntax is: |
622 | * - double quotes are removed, but cause spaces within to be |
623 | * treated as non-separating. |
624 | * - a double-doublequote pair is a literal double quote, inside |
625 | * _or_ outside quotes. Like this: |
626 | * |
627 | * firstword "second word" "this has ""quotes"" in" sodoes""this"" |
628 | * |
629 | * becomes |
630 | * |
631 | * >firstword< |
632 | * >second word< |
633 | * >this has "quotes" in< |
634 | * >sodoes"this"< |
635 | */ |
636 | p = line; |
637 | while (*p) { |
638 | /* skip whitespace */ |
32874aea |
639 | while (*p && (*p == ' ' || *p == '\t')) |
640 | p++; |
4c7f0d61 |
641 | /* mark start of word */ |
642 | q = r = p; /* q sits at start, r writes word */ |
643 | quoting = 0; |
644 | while (*p) { |
645 | if (!quoting && (*p == ' ' || *p == '\t')) |
646 | break; /* reached end of word */ |
647 | else if (*p == '"' && p[1] == '"') |
32874aea |
648 | p += 2, *r++ = '"'; /* a literal quote */ |
4c7f0d61 |
649 | else if (*p == '"') |
650 | p++, quoting = !quoting; |
651 | else |
652 | *r++ = *p++; |
653 | } |
32874aea |
654 | if (*p) |
655 | p++; /* skip over the whitespace */ |
4c7f0d61 |
656 | *r = '\0'; |
657 | if (cmd->nwords >= cmd->wordssize) { |
658 | cmd->wordssize = cmd->nwords + 16; |
32874aea |
659 | cmd->words = |
660 | srealloc(cmd->words, cmd->wordssize * sizeof(char *)); |
4c7f0d61 |
661 | } |
662 | cmd->words[cmd->nwords++] = q; |
663 | } |
664 | |
665 | /* |
666 | * Now parse the first word and assign a function. |
667 | */ |
668 | |
669 | if (cmd->nwords == 0) |
670 | cmd->obey = sftp_cmd_null; |
671 | else { |
672 | int i, j, k, cmp; |
673 | |
674 | cmd->obey = sftp_cmd_unknown; |
675 | |
676 | i = -1; |
677 | j = sizeof(sftp_lookup) / sizeof(*sftp_lookup); |
678 | while (j - i > 1) { |
679 | k = (j + i) / 2; |
680 | cmp = strcmp(cmd->words[0], sftp_lookup[k].name); |
681 | if (cmp < 0) |
682 | j = k; |
683 | else if (cmp > 0) |
684 | i = k; |
685 | else { |
686 | cmd->obey = sftp_lookup[k].obey; |
687 | break; |
688 | } |
689 | } |
690 | } |
691 | |
692 | return cmd; |
693 | } |
694 | |
9954aaa3 |
695 | void do_sftp(int mode, int modeflags, char *batchfile) |
32874aea |
696 | { |
9954aaa3 |
697 | FILE *fp; |
698 | |
4c7f0d61 |
699 | /* |
700 | * Do protocol initialisation. |
701 | */ |
702 | if (!fxp_init()) { |
703 | fprintf(stderr, |
32874aea |
704 | "Fatal: unable to initialise SFTP: %s\n", fxp_error()); |
0d694692 |
705 | return; |
4c7f0d61 |
706 | } |
707 | |
708 | /* |
709 | * Find out where our home directory is. |
710 | */ |
f9e162aa |
711 | homedir = fxp_realpath("."); |
4c7f0d61 |
712 | if (!homedir) { |
713 | fprintf(stderr, |
714 | "Warning: failed to resolve home directory: %s\n", |
715 | fxp_error()); |
716 | homedir = dupstr("."); |
717 | } else { |
718 | printf("Remote working directory is %s\n", homedir); |
719 | } |
720 | pwd = dupstr(homedir); |
721 | |
9954aaa3 |
722 | /* |
723 | * Batch mode? |
4c7f0d61 |
724 | */ |
9954aaa3 |
725 | if (mode == 0) { |
726 | |
727 | /* ------------------------------------------------------------------ |
728 | * Now we're ready to do Real Stuff. |
729 | */ |
730 | while (1) { |
731 | struct sftp_command *cmd; |
732 | cmd = sftp_getcmd(stdin, 0, 0); |
733 | if (!cmd) |
734 | break; |
735 | if (cmd->obey(cmd) < 0) |
736 | break; |
737 | } |
738 | } else { |
739 | fp = fopen(batchfile, "r"); |
740 | if (!fp) { |
741 | printf("Fatal: unable to open %s\n", batchfile); |
742 | return; |
743 | } |
744 | while (1) { |
745 | struct sftp_command *cmd; |
746 | cmd = sftp_getcmd(fp, mode, modeflags); |
747 | if (!cmd) |
748 | break; |
749 | if (cmd->obey(cmd) < 0) |
750 | break; |
751 | if (fxp_error() != NULL) { |
752 | if (!(modeflags & 2)) |
753 | break; |
754 | } |
755 | } |
756 | fclose(fp); |
757 | |
4c7f0d61 |
758 | } |
4a8fc3c4 |
759 | } |
4c7f0d61 |
760 | |
4a8fc3c4 |
761 | /* ---------------------------------------------------------------------- |
762 | * Dirty bits: integration with PuTTY. |
763 | */ |
764 | |
765 | static int verbose = 0; |
766 | |
767 | void verify_ssh_host_key(char *host, int port, char *keytype, |
32874aea |
768 | char *keystr, char *fingerprint) |
769 | { |
4a8fc3c4 |
770 | int ret; |
d0718310 |
771 | HANDLE hin; |
772 | DWORD savemode, i; |
4a8fc3c4 |
773 | |
774 | static const char absentmsg[] = |
32874aea |
775 | "The server's host key is not cached in the registry. You\n" |
776 | "have no guarantee that the server is the computer you\n" |
777 | "think it is.\n" |
778 | "The server's key fingerprint is:\n" |
779 | "%s\n" |
780 | "If you trust this host, enter \"y\" to add the key to\n" |
781 | "PuTTY's cache and carry on connecting.\n" |
d0718310 |
782 | "If you want to carry on connecting just once, without\n" |
783 | "adding the key to the cache, enter \"n\".\n" |
784 | "If you do not trust this host, press Return to abandon the\n" |
785 | "connection.\n" |
786 | "Store key in cache? (y/n) "; |
4a8fc3c4 |
787 | |
788 | static const char wrongmsg[] = |
32874aea |
789 | "WARNING - POTENTIAL SECURITY BREACH!\n" |
790 | "The server's host key does not match the one PuTTY has\n" |
791 | "cached in the registry. This means that either the\n" |
792 | "server administrator has changed the host key, or you\n" |
793 | "have actually connected to another computer pretending\n" |
794 | "to be the server.\n" |
795 | "The new key fingerprint is:\n" |
796 | "%s\n" |
797 | "If you were expecting this change and trust the new key,\n" |
d0718310 |
798 | "enter \"y\" to update PuTTY's cache and continue connecting.\n" |
32874aea |
799 | "If you want to carry on connecting but without updating\n" |
d0718310 |
800 | "the cache, enter \"n\".\n" |
32874aea |
801 | "If you want to abandon the connection completely, press\n" |
802 | "Return to cancel. Pressing Return is the ONLY guaranteed\n" |
803 | "safe choice.\n" |
804 | "Update cached key? (y/n, Return cancels connection) "; |
4a8fc3c4 |
805 | |
806 | static const char abandoned[] = "Connection abandoned.\n"; |
807 | |
808 | char line[32]; |
809 | |
810 | /* |
811 | * Verify the key against the registry. |
812 | */ |
813 | ret = verify_host_key(host, port, keytype, keystr); |
814 | |
32874aea |
815 | if (ret == 0) /* success - key matched OK */ |
816 | return; |
d0718310 |
817 | |
32874aea |
818 | if (ret == 2) { /* key was different */ |
819 | fprintf(stderr, wrongmsg, fingerprint); |
d0718310 |
820 | fflush(stderr); |
4a8fc3c4 |
821 | } |
32874aea |
822 | if (ret == 1) { /* key was absent */ |
823 | fprintf(stderr, absentmsg, fingerprint); |
d0718310 |
824 | fflush(stderr); |
825 | } |
826 | |
827 | hin = GetStdHandle(STD_INPUT_HANDLE); |
828 | GetConsoleMode(hin, &savemode); |
829 | SetConsoleMode(hin, (savemode | ENABLE_ECHO_INPUT | |
830 | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT)); |
831 | ReadFile(hin, line, sizeof(line) - 1, &i, NULL); |
832 | SetConsoleMode(hin, savemode); |
833 | |
834 | if (line[0] != '\0' && line[0] != '\r' && line[0] != '\n') { |
835 | if (line[0] == 'y' || line[0] == 'Y') |
32874aea |
836 | store_host_key(host, port, keytype, keystr); |
d0718310 |
837 | } else { |
838 | fprintf(stderr, abandoned); |
839 | exit(0); |
4a8fc3c4 |
840 | } |
841 | } |
842 | |
843 | /* |
844 | * Print an error message and perform a fatal exit. |
845 | */ |
846 | void fatalbox(char *fmt, ...) |
847 | { |
32874aea |
848 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
849 | va_list ap; |
850 | va_start(ap, fmt); |
851 | strcpy(str, "Fatal:"); |
32874aea |
852 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
853 | va_end(ap); |
854 | strcat(str, "\n"); |
855 | fprintf(stderr, str); |
856 | |
857 | exit(1); |
858 | } |
859 | void connection_fatal(char *fmt, ...) |
860 | { |
32874aea |
861 | char str[0x100]; /* Make the size big enough */ |
4a8fc3c4 |
862 | va_list ap; |
863 | va_start(ap, fmt); |
864 | strcpy(str, "Fatal:"); |
32874aea |
865 | vsprintf(str + strlen(str), fmt, ap); |
4a8fc3c4 |
866 | va_end(ap); |
867 | strcat(str, "\n"); |
868 | fprintf(stderr, str); |
869 | |
870 | exit(1); |
871 | } |
872 | |
32874aea |
873 | void logevent(char *string) |
874 | { |
875 | } |
4a8fc3c4 |
876 | |
32874aea |
877 | void ldisc_send(char *buf, int len) |
878 | { |
4a8fc3c4 |
879 | /* |
880 | * This is only here because of the calls to ldisc_send(NULL, |
881 | * 0) in ssh.c. Nothing in PSFTP actually needs to use the |
882 | * ldisc as an ldisc. So if we get called with any real data, I |
883 | * want to know about it. |
4c7f0d61 |
884 | */ |
4a8fc3c4 |
885 | assert(len == 0); |
886 | } |
887 | |
888 | /* |
889 | * Be told what socket we're supposed to be using. |
890 | */ |
891 | static SOCKET sftp_ssh_socket; |
32874aea |
892 | char *do_select(SOCKET skt, int startup) |
893 | { |
4a8fc3c4 |
894 | if (startup) |
895 | sftp_ssh_socket = skt; |
896 | else |
897 | sftp_ssh_socket = INVALID_SOCKET; |
898 | return NULL; |
4c7f0d61 |
899 | } |
4a8fc3c4 |
900 | extern int select_result(WPARAM, LPARAM); |
901 | |
902 | /* |
903 | * Receive a block of data from the SSH link. Block until all data |
904 | * is available. |
905 | * |
906 | * To do this, we repeatedly call the SSH protocol module, with our |
907 | * own trap in from_backend() to catch the data that comes back. We |
908 | * do this until we have enough data. |
909 | */ |
910 | |
32874aea |
911 | static unsigned char *outptr; /* where to put the data */ |
912 | static unsigned outlen; /* how much data required */ |
4a8fc3c4 |
913 | static unsigned char *pending = NULL; /* any spare data */ |
32874aea |
914 | static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */ |
915 | void from_backend(int is_stderr, char *data, int datalen) |
916 | { |
917 | unsigned char *p = (unsigned char *) data; |
918 | unsigned len = (unsigned) datalen; |
4a8fc3c4 |
919 | |
920 | /* |
921 | * stderr data is just spouted to local stderr and otherwise |
922 | * ignored. |
923 | */ |
924 | if (is_stderr) { |
925 | fwrite(data, 1, len, stderr); |
926 | return; |
927 | } |
928 | |
929 | /* |
930 | * If this is before the real session begins, just return. |
931 | */ |
932 | if (!outptr) |
32874aea |
933 | return; |
4a8fc3c4 |
934 | |
935 | if (outlen > 0) { |
32874aea |
936 | unsigned used = outlen; |
937 | if (used > len) |
938 | used = len; |
939 | memcpy(outptr, p, used); |
940 | outptr += used; |
941 | outlen -= used; |
942 | p += used; |
943 | len -= used; |
4a8fc3c4 |
944 | } |
945 | |
946 | if (len > 0) { |
32874aea |
947 | if (pendsize < pendlen + len) { |
948 | pendsize = pendlen + len + 4096; |
949 | pending = (pending ? srealloc(pending, pendsize) : |
950 | smalloc(pendsize)); |
951 | if (!pending) |
952 | fatalbox("Out of memory"); |
953 | } |
954 | memcpy(pending + pendlen, p, len); |
955 | pendlen += len; |
4a8fc3c4 |
956 | } |
957 | } |
32874aea |
958 | int sftp_recvdata(char *buf, int len) |
959 | { |
960 | outptr = (unsigned char *) buf; |
4a8fc3c4 |
961 | outlen = len; |
962 | |
963 | /* |
964 | * See if the pending-input block contains some of what we |
965 | * need. |
966 | */ |
967 | if (pendlen > 0) { |
32874aea |
968 | unsigned pendused = pendlen; |
969 | if (pendused > outlen) |
970 | pendused = outlen; |
4a8fc3c4 |
971 | memcpy(outptr, pending, pendused); |
32874aea |
972 | memmove(pending, pending + pendused, pendlen - pendused); |
4a8fc3c4 |
973 | outptr += pendused; |
974 | outlen -= pendused; |
32874aea |
975 | pendlen -= pendused; |
976 | if (pendlen == 0) { |
977 | pendsize = 0; |
978 | sfree(pending); |
979 | pending = NULL; |
980 | } |
981 | if (outlen == 0) |
982 | return 1; |
4a8fc3c4 |
983 | } |
984 | |
985 | while (outlen > 0) { |
32874aea |
986 | fd_set readfds; |
4a8fc3c4 |
987 | |
32874aea |
988 | FD_ZERO(&readfds); |
989 | FD_SET(sftp_ssh_socket, &readfds); |
990 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
991 | return 0; /* doom */ |
992 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
993 | } |
994 | |
995 | return 1; |
996 | } |
32874aea |
997 | int sftp_senddata(char *buf, int len) |
998 | { |
999 | back->send((unsigned char *) buf, len); |
4a8fc3c4 |
1000 | return 1; |
1001 | } |
1002 | |
1003 | /* |
1004 | * Loop through the ssh connection and authentication process. |
1005 | */ |
32874aea |
1006 | static void ssh_sftp_init(void) |
1007 | { |
4a8fc3c4 |
1008 | if (sftp_ssh_socket == INVALID_SOCKET) |
1009 | return; |
1010 | while (!back->sendok()) { |
32874aea |
1011 | fd_set readfds; |
1012 | FD_ZERO(&readfds); |
1013 | FD_SET(sftp_ssh_socket, &readfds); |
1014 | if (select(1, &readfds, NULL, NULL, NULL) < 0) |
1015 | return; /* doom */ |
1016 | select_result((WPARAM) sftp_ssh_socket, (LPARAM) FD_READ); |
4a8fc3c4 |
1017 | } |
1018 | } |
1019 | |
1020 | static char *password = NULL; |
fa17a66e |
1021 | static int get_line(const char *prompt, char *str, int maxlen, int is_pw) |
4a8fc3c4 |
1022 | { |
1023 | HANDLE hin, hout; |
fa17a66e |
1024 | DWORD savemode, newmode, i; |
4a8fc3c4 |
1025 | |
1026 | if (password) { |
32874aea |
1027 | static int tried_once = 0; |
1028 | |
1029 | if (tried_once) { |
1030 | return 0; |
1031 | } else { |
1032 | strncpy(str, password, maxlen); |
1033 | str[maxlen - 1] = '\0'; |
1034 | tried_once = 1; |
1035 | return 1; |
1036 | } |
4a8fc3c4 |
1037 | } |
1038 | |
1039 | hin = GetStdHandle(STD_INPUT_HANDLE); |
1040 | hout = GetStdHandle(STD_OUTPUT_HANDLE); |
1041 | if (hin == INVALID_HANDLE_VALUE || hout == INVALID_HANDLE_VALUE) { |
1042 | fprintf(stderr, "Cannot get standard input/output handles\n"); |
1043 | exit(1); |
1044 | } |
1045 | |
1046 | GetConsoleMode(hin, &savemode); |
fa17a66e |
1047 | newmode = savemode | ENABLE_PROCESSED_INPUT | ENABLE_LINE_INPUT; |
1048 | if (is_pw) |
32874aea |
1049 | newmode &= ~ENABLE_ECHO_INPUT; |
fa17a66e |
1050 | else |
32874aea |
1051 | newmode |= ENABLE_ECHO_INPUT; |
fa17a66e |
1052 | SetConsoleMode(hin, newmode); |
4a8fc3c4 |
1053 | |
1054 | WriteFile(hout, prompt, strlen(prompt), &i, NULL); |
32874aea |
1055 | ReadFile(hin, str, maxlen - 1, &i, NULL); |
4a8fc3c4 |
1056 | |
1057 | SetConsoleMode(hin, savemode); |
1058 | |
32874aea |
1059 | if ((int) i > maxlen) |
1060 | i = maxlen - 1; |
1061 | else |
1062 | i = i - 2; |
4a8fc3c4 |
1063 | str[i] = '\0'; |
1064 | |
fa17a66e |
1065 | if (is_pw) |
32874aea |
1066 | WriteFile(hout, "\r\n", 2, &i, NULL); |
4a8fc3c4 |
1067 | |
1068 | return 1; |
1069 | } |
1070 | |
1071 | /* |
1072 | * Initialize the Win$ock driver. |
1073 | */ |
1074 | static void init_winsock(void) |
1075 | { |
1076 | WORD winsock_ver; |
1077 | WSADATA wsadata; |
1078 | |
1079 | winsock_ver = MAKEWORD(1, 1); |
1080 | if (WSAStartup(winsock_ver, &wsadata)) { |
1081 | fprintf(stderr, "Unable to initialise WinSock"); |
1082 | exit(1); |
1083 | } |
32874aea |
1084 | if (LOBYTE(wsadata.wVersion) != 1 || HIBYTE(wsadata.wVersion) != 1) { |
4a8fc3c4 |
1085 | fprintf(stderr, "WinSock version is incompatible with 1.1"); |
1086 | exit(1); |
1087 | } |
1088 | } |
1089 | |
1090 | /* |
1091 | * Short description of parameters. |
1092 | */ |
1093 | static void usage(void) |
1094 | { |
1095 | printf("PuTTY Secure File Transfer (SFTP) client\n"); |
1096 | printf("%s\n", ver); |
1097 | printf("Usage: psftp [options] user@host\n"); |
1098 | printf("Options:\n"); |
9954aaa3 |
1099 | printf(" -b file use specified batchfile\n"); |
1100 | printf(" -bc output batchfile commands\n"); |
1101 | printf(" -be don't stop batchfile processing if errors\n"); |
4a8fc3c4 |
1102 | printf(" -v show verbose messages\n"); |
1103 | printf(" -P port connect to specified port\n"); |
1104 | printf(" -pw passw login with specified password\n"); |
1105 | exit(1); |
1106 | } |
1107 | |
1108 | /* |
1109 | * Main program. Parse arguments etc. |
1110 | */ |
1111 | int main(int argc, char *argv[]) |
1112 | { |
1113 | int i; |
1114 | int portnumber = 0; |
1115 | char *user, *host, *userhost, *realhost; |
1116 | char *err; |
9954aaa3 |
1117 | int mode = 0; |
1118 | int modeflags = 0; |
1119 | char *batchfile = NULL; |
4a8fc3c4 |
1120 | |
1121 | flags = FLAG_STDERR; |
fa17a66e |
1122 | ssh_get_line = &get_line; |
4a8fc3c4 |
1123 | init_winsock(); |
1124 | sk_init(); |
1125 | |
1126 | userhost = user = NULL; |
1127 | |
1128 | for (i = 1; i < argc; i++) { |
1129 | if (argv[i][0] != '-') { |
1130 | if (userhost) |
1131 | usage(); |
1132 | else |
1133 | userhost = dupstr(argv[i]); |
1134 | } else if (strcmp(argv[i], "-v") == 0) { |
1135 | verbose = 1, flags |= FLAG_VERBOSE; |
1136 | } else if (strcmp(argv[i], "-h") == 0 || |
1137 | strcmp(argv[i], "-?") == 0) { |
1138 | usage(); |
32874aea |
1139 | } else if (strcmp(argv[i], "-l") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1140 | user = argv[++i]; |
32874aea |
1141 | } else if (strcmp(argv[i], "-P") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1142 | portnumber = atoi(argv[++i]); |
32874aea |
1143 | } else if (strcmp(argv[i], "-pw") == 0 && i + 1 < argc) { |
4a8fc3c4 |
1144 | password = argv[++i]; |
9954aaa3 |
1145 | } else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) { |
1146 | mode = 1; |
1147 | batchfile = argv[++i]; |
1148 | } else if (strcmp(argv[i], "-bc") == 0 && i + 1 < argc) { |
1149 | modeflags = modeflags | 1; |
1150 | } else if (strcmp(argv[i], "-be") == 0 && i + 1 < argc) { |
1151 | modeflags = modeflags | 2; |
4a8fc3c4 |
1152 | } else if (strcmp(argv[i], "--") == 0) { |
1153 | i++; |
1154 | break; |
1155 | } else { |
1156 | usage(); |
1157 | } |
1158 | } |
1159 | argc -= i; |
1160 | argv += i; |
1161 | back = NULL; |
1162 | |
1163 | if (argc > 0 || !userhost) |
1164 | usage(); |
1165 | |
1166 | /* Separate host and username */ |
1167 | host = userhost; |
1168 | host = strrchr(host, '@'); |
1169 | if (host == NULL) { |
1170 | host = userhost; |
1171 | } else { |
1172 | *host++ = '\0'; |
1173 | if (user) { |
32874aea |
1174 | printf("psftp: multiple usernames specified; using \"%s\"\n", |
1175 | user); |
4a8fc3c4 |
1176 | } else |
1177 | user = userhost; |
1178 | } |
1179 | |
1180 | /* Try to load settings for this host */ |
1181 | do_defaults(host, &cfg); |
1182 | if (cfg.host[0] == '\0') { |
1183 | /* No settings for this host; use defaults */ |
32874aea |
1184 | do_defaults(NULL, &cfg); |
1185 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
1186 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
4a8fc3c4 |
1187 | cfg.port = 22; |
1188 | } |
1189 | |
1190 | /* Set username */ |
1191 | if (user != NULL && user[0] != '\0') { |
32874aea |
1192 | strncpy(cfg.username, user, sizeof(cfg.username) - 1); |
1193 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
4a8fc3c4 |
1194 | } |
1195 | if (!cfg.username[0]) { |
1196 | printf("login as: "); |
1197 | if (!fgets(cfg.username, sizeof(cfg.username), stdin)) { |
1198 | fprintf(stderr, "psftp: aborting\n"); |
1199 | exit(1); |
1200 | } else { |
1201 | int len = strlen(cfg.username); |
32874aea |
1202 | if (cfg.username[len - 1] == '\n') |
1203 | cfg.username[len - 1] = '\0'; |
4a8fc3c4 |
1204 | } |
1205 | } |
1206 | |
1207 | if (cfg.protocol != PROT_SSH) |
1208 | cfg.port = 22; |
1209 | |
1210 | if (portnumber) |
1211 | cfg.port = portnumber; |
1212 | |
1213 | /* SFTP uses SSH2 by default always */ |
1214 | cfg.sshprot = 2; |
1215 | |
1216 | /* Set up subsystem name. FIXME: fudge for SSH1. */ |
1217 | strcpy(cfg.remote_cmd, "sftp"); |
1218 | cfg.ssh_subsys = TRUE; |
1219 | cfg.nopty = TRUE; |
1220 | |
1221 | back = &ssh_backend; |
1222 | |
1223 | err = back->init(cfg.host, cfg.port, &realhost); |
1224 | if (err != NULL) { |
1225 | fprintf(stderr, "ssh_init: %s", err); |
1226 | return 1; |
1227 | } |
1228 | ssh_sftp_init(); |
1229 | if (verbose && realhost != NULL) |
1230 | printf("Connected to %s\n", realhost); |
4c7f0d61 |
1231 | |
9954aaa3 |
1232 | do_sftp(mode, modeflags, batchfile); |
4a8fc3c4 |
1233 | |
1234 | if (back != NULL && back->socket() != NULL) { |
1235 | char ch; |
1236 | back->special(TS_EOF); |
1237 | sftp_recvdata(&ch, 1); |
1238 | } |
1239 | WSACleanup(); |
1240 | random_save_seed(); |
1241 | |
4c7f0d61 |
1242 | return 0; |
1243 | } |