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