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