4c7f0d61 |
1 | /* |
2 | * sftp.c: SFTP generic client code. |
3 | */ |
4 | |
5 | #include <stdio.h> |
6 | #include <stdlib.h> |
4a8fc3c4 |
7 | #include <string.h> |
4c7f0d61 |
8 | #include <assert.h> |
4c7f0d61 |
9 | |
78139cd8 |
10 | #include "misc.h" |
4c7f0d61 |
11 | #include "int64.h" |
12 | #include "sftp.h" |
13 | |
4c7f0d61 |
14 | #define GET_32BIT(cp) \ |
15 | (((unsigned long)(unsigned char)(cp)[0] << 24) | \ |
16 | ((unsigned long)(unsigned char)(cp)[1] << 16) | \ |
17 | ((unsigned long)(unsigned char)(cp)[2] << 8) | \ |
18 | ((unsigned long)(unsigned char)(cp)[3])) |
19 | |
20 | #define PUT_32BIT(cp, value) { \ |
21 | (cp)[0] = (unsigned char)((value) >> 24); \ |
22 | (cp)[1] = (unsigned char)((value) >> 16); \ |
23 | (cp)[2] = (unsigned char)((value) >> 8); \ |
24 | (cp)[3] = (unsigned char)(value); } |
25 | |
26 | struct sftp_packet { |
27 | char *data; |
28 | int length, maxlen; |
29 | int savedpos; |
30 | int type; |
31 | }; |
32 | |
9954aaa3 |
33 | static const char *fxp_error_message; |
34 | static int fxp_errtype; |
35 | |
4c7f0d61 |
36 | /* ---------------------------------------------------------------------- |
37 | * SFTP packet construction functions. |
38 | */ |
32874aea |
39 | static void sftp_pkt_ensure(struct sftp_packet *pkt, int length) |
40 | { |
4c7f0d61 |
41 | if (pkt->maxlen < length) { |
32874aea |
42 | pkt->maxlen = length + 256; |
4c7f0d61 |
43 | pkt->data = srealloc(pkt->data, pkt->maxlen); |
44 | } |
45 | } |
32874aea |
46 | static void sftp_pkt_adddata(struct sftp_packet *pkt, void *data, int len) |
47 | { |
4c7f0d61 |
48 | pkt->length += len; |
49 | sftp_pkt_ensure(pkt, pkt->length); |
32874aea |
50 | memcpy(pkt->data + pkt->length - len, data, len); |
4c7f0d61 |
51 | } |
32874aea |
52 | static void sftp_pkt_addbyte(struct sftp_packet *pkt, unsigned char byte) |
53 | { |
4c7f0d61 |
54 | sftp_pkt_adddata(pkt, &byte, 1); |
55 | } |
32874aea |
56 | static struct sftp_packet *sftp_pkt_init(int pkt_type) |
57 | { |
4c7f0d61 |
58 | struct sftp_packet *pkt; |
59 | pkt = smalloc(sizeof(struct sftp_packet)); |
60 | pkt->data = NULL; |
61 | pkt->savedpos = -1; |
62 | pkt->length = 0; |
63 | pkt->maxlen = 0; |
32874aea |
64 | sftp_pkt_addbyte(pkt, (unsigned char) pkt_type); |
9954aaa3 |
65 | fxp_error_message = NULL; |
4c7f0d61 |
66 | return pkt; |
67 | } |
32874aea |
68 | static void sftp_pkt_addbool(struct sftp_packet *pkt, unsigned char value) |
69 | { |
4c7f0d61 |
70 | sftp_pkt_adddata(pkt, &value, 1); |
71 | } |
32874aea |
72 | static void sftp_pkt_adduint32(struct sftp_packet *pkt, |
73 | unsigned long value) |
74 | { |
4c7f0d61 |
75 | unsigned char x[4]; |
76 | PUT_32BIT(x, value); |
77 | sftp_pkt_adddata(pkt, x, 4); |
78 | } |
32874aea |
79 | static void sftp_pkt_adduint64(struct sftp_packet *pkt, uint64 value) |
80 | { |
4c7f0d61 |
81 | unsigned char x[8]; |
82 | PUT_32BIT(x, value.hi); |
32874aea |
83 | PUT_32BIT(x + 4, value.lo); |
4c7f0d61 |
84 | sftp_pkt_adddata(pkt, x, 8); |
85 | } |
32874aea |
86 | static void sftp_pkt_addstring_start(struct sftp_packet *pkt) |
87 | { |
4c7f0d61 |
88 | sftp_pkt_adduint32(pkt, 0); |
89 | pkt->savedpos = pkt->length; |
90 | } |
32874aea |
91 | static void sftp_pkt_addstring_str(struct sftp_packet *pkt, char *data) |
92 | { |
4c7f0d61 |
93 | sftp_pkt_adddata(pkt, data, strlen(data)); |
32874aea |
94 | PUT_32BIT(pkt->data + pkt->savedpos - 4, pkt->length - pkt->savedpos); |
4c7f0d61 |
95 | } |
96 | static void sftp_pkt_addstring_data(struct sftp_packet *pkt, |
32874aea |
97 | char *data, int len) |
98 | { |
4c7f0d61 |
99 | sftp_pkt_adddata(pkt, data, len); |
32874aea |
100 | PUT_32BIT(pkt->data + pkt->savedpos - 4, pkt->length - pkt->savedpos); |
4c7f0d61 |
101 | } |
32874aea |
102 | static void sftp_pkt_addstring(struct sftp_packet *pkt, char *data) |
103 | { |
4c7f0d61 |
104 | sftp_pkt_addstring_start(pkt); |
105 | sftp_pkt_addstring_str(pkt, data); |
106 | } |
d92624dc |
107 | static void sftp_pkt_addattrs(struct sftp_packet *pkt, struct fxp_attrs attrs) |
108 | { |
109 | sftp_pkt_adduint32(pkt, attrs.flags); |
110 | if (attrs.flags & SSH_FILEXFER_ATTR_SIZE) { |
111 | sftp_pkt_adduint32(pkt, attrs.size.hi); |
112 | sftp_pkt_adduint32(pkt, attrs.size.lo); |
113 | } |
114 | if (attrs.flags & SSH_FILEXFER_ATTR_UIDGID) { |
115 | sftp_pkt_adduint32(pkt, attrs.uid); |
116 | sftp_pkt_adduint32(pkt, attrs.gid); |
117 | } |
118 | if (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) { |
119 | sftp_pkt_adduint32(pkt, attrs.permissions); |
120 | } |
121 | if (attrs.flags & SSH_FILEXFER_ATTR_ACMODTIME) { |
122 | sftp_pkt_adduint32(pkt, attrs.atime); |
123 | sftp_pkt_adduint32(pkt, attrs.mtime); |
124 | } |
125 | if (attrs.flags & SSH_FILEXFER_ATTR_EXTENDED) { |
126 | /* |
127 | * We currently don't support sending any extended |
128 | * attributes. |
129 | */ |
130 | } |
131 | } |
4c7f0d61 |
132 | |
133 | /* ---------------------------------------------------------------------- |
134 | * SFTP packet decode functions. |
135 | */ |
136 | |
32874aea |
137 | static unsigned char sftp_pkt_getbyte(struct sftp_packet *pkt) |
138 | { |
d8770b12 |
139 | unsigned char value; |
4c7f0d61 |
140 | if (pkt->length - pkt->savedpos < 1) |
32874aea |
141 | return 0; /* arrgh, no way to decline (FIXME?) */ |
4c7f0d61 |
142 | value = (unsigned char) pkt->data[pkt->savedpos]; |
143 | pkt->savedpos++; |
144 | return value; |
145 | } |
32874aea |
146 | static unsigned long sftp_pkt_getuint32(struct sftp_packet *pkt) |
147 | { |
4c7f0d61 |
148 | unsigned long value; |
149 | if (pkt->length - pkt->savedpos < 4) |
32874aea |
150 | return 0; /* arrgh, no way to decline (FIXME?) */ |
151 | value = GET_32BIT(pkt->data + pkt->savedpos); |
4c7f0d61 |
152 | pkt->savedpos += 4; |
153 | return value; |
154 | } |
155 | static void sftp_pkt_getstring(struct sftp_packet *pkt, |
32874aea |
156 | char **p, int *length) |
157 | { |
4c7f0d61 |
158 | *p = NULL; |
159 | if (pkt->length - pkt->savedpos < 4) |
32874aea |
160 | return; |
161 | *length = GET_32BIT(pkt->data + pkt->savedpos); |
4c7f0d61 |
162 | pkt->savedpos += 4; |
163 | if (pkt->length - pkt->savedpos < *length) |
32874aea |
164 | return; |
165 | *p = pkt->data + pkt->savedpos; |
4c7f0d61 |
166 | pkt->savedpos += *length; |
167 | } |
32874aea |
168 | static struct fxp_attrs sftp_pkt_getattrs(struct sftp_packet *pkt) |
169 | { |
4c7f0d61 |
170 | struct fxp_attrs ret; |
171 | ret.flags = sftp_pkt_getuint32(pkt); |
172 | if (ret.flags & SSH_FILEXFER_ATTR_SIZE) { |
173 | unsigned long hi, lo; |
174 | hi = sftp_pkt_getuint32(pkt); |
175 | lo = sftp_pkt_getuint32(pkt); |
176 | ret.size = uint64_make(hi, lo); |
177 | } |
178 | if (ret.flags & SSH_FILEXFER_ATTR_UIDGID) { |
179 | ret.uid = sftp_pkt_getuint32(pkt); |
180 | ret.gid = sftp_pkt_getuint32(pkt); |
181 | } |
182 | if (ret.flags & SSH_FILEXFER_ATTR_PERMISSIONS) { |
183 | ret.permissions = sftp_pkt_getuint32(pkt); |
184 | } |
185 | if (ret.flags & SSH_FILEXFER_ATTR_ACMODTIME) { |
186 | ret.atime = sftp_pkt_getuint32(pkt); |
187 | ret.mtime = sftp_pkt_getuint32(pkt); |
188 | } |
189 | if (ret.flags & SSH_FILEXFER_ATTR_EXTENDED) { |
190 | int count; |
191 | count = sftp_pkt_getuint32(pkt); |
192 | while (count--) { |
193 | char *str; |
194 | int len; |
195 | /* |
196 | * We should try to analyse these, if we ever find one |
197 | * we recognise. |
198 | */ |
199 | sftp_pkt_getstring(pkt, &str, &len); |
200 | sftp_pkt_getstring(pkt, &str, &len); |
201 | } |
202 | } |
203 | return ret; |
204 | } |
32874aea |
205 | static void sftp_pkt_free(struct sftp_packet *pkt) |
206 | { |
207 | if (pkt->data) |
208 | sfree(pkt->data); |
4c7f0d61 |
209 | sfree(pkt); |
210 | } |
211 | |
212 | /* ---------------------------------------------------------------------- |
4a8fc3c4 |
213 | * Send and receive packet functions. |
4c7f0d61 |
214 | */ |
32874aea |
215 | int sftp_send(struct sftp_packet *pkt) |
216 | { |
4a8fc3c4 |
217 | int ret; |
4c7f0d61 |
218 | char x[4]; |
219 | PUT_32BIT(x, pkt->length); |
32874aea |
220 | ret = (sftp_senddata(x, 4) && sftp_senddata(pkt->data, pkt->length)); |
4c7f0d61 |
221 | sftp_pkt_free(pkt); |
4a8fc3c4 |
222 | return ret; |
4c7f0d61 |
223 | } |
32874aea |
224 | struct sftp_packet *sftp_recv(void) |
225 | { |
4c7f0d61 |
226 | struct sftp_packet *pkt; |
227 | char x[4]; |
4c7f0d61 |
228 | |
4a8fc3c4 |
229 | if (!sftp_recvdata(x, 4)) |
230 | return NULL; |
4c7f0d61 |
231 | |
232 | pkt = smalloc(sizeof(struct sftp_packet)); |
233 | pkt->savedpos = 0; |
234 | pkt->length = pkt->maxlen = GET_32BIT(x); |
235 | pkt->data = smalloc(pkt->length); |
236 | |
4a8fc3c4 |
237 | if (!sftp_recvdata(pkt->data, pkt->length)) { |
238 | sftp_pkt_free(pkt); |
239 | return NULL; |
4c7f0d61 |
240 | } |
241 | |
242 | pkt->type = sftp_pkt_getbyte(pkt); |
243 | |
244 | return pkt; |
245 | } |
246 | |
247 | /* ---------------------------------------------------------------------- |
248 | * String handling routines. |
249 | */ |
250 | |
32874aea |
251 | static char *mkstr(char *s, int len) |
252 | { |
253 | char *p = smalloc(len + 1); |
4c7f0d61 |
254 | memcpy(p, s, len); |
255 | p[len] = '\0'; |
256 | return p; |
257 | } |
258 | |
259 | /* ---------------------------------------------------------------------- |
260 | * SFTP primitives. |
261 | */ |
262 | |
4c7f0d61 |
263 | /* |
264 | * Deal with (and free) an FXP_STATUS packet. Return 1 if |
265 | * SSH_FX_OK, 0 if SSH_FX_EOF, and -1 for anything else (error). |
266 | * Also place the status into fxp_errtype. |
267 | */ |
32874aea |
268 | static int fxp_got_status(struct sftp_packet *pktin) |
269 | { |
4c7f0d61 |
270 | static const char *const messages[] = { |
271 | /* SSH_FX_OK. The only time we will display a _message_ for this |
272 | * is if we were expecting something other than FXP_STATUS on |
273 | * success, so this is actually an error message! */ |
274 | "unexpected OK response", |
275 | "end of file", |
276 | "no such file or directory", |
277 | "permission denied", |
278 | "failure", |
279 | "bad message", |
280 | "no connection", |
281 | "connection lost", |
282 | "operation unsupported", |
283 | }; |
284 | |
285 | if (pktin->type != SSH_FXP_STATUS) { |
286 | fxp_error_message = "expected FXP_STATUS packet"; |
287 | fxp_errtype = -1; |
288 | } else { |
289 | fxp_errtype = sftp_pkt_getuint32(pktin); |
290 | if (fxp_errtype < 0 || |
32874aea |
291 | fxp_errtype >= sizeof(messages) / sizeof(*messages)) |
292 | fxp_error_message = "unknown error code"; |
4c7f0d61 |
293 | else |
294 | fxp_error_message = messages[fxp_errtype]; |
295 | } |
296 | |
297 | if (fxp_errtype == SSH_FX_OK) |
298 | return 1; |
299 | else if (fxp_errtype == SSH_FX_EOF) |
300 | return 0; |
301 | else |
302 | return -1; |
303 | } |
304 | |
32874aea |
305 | static void fxp_internal_error(char *msg) |
306 | { |
4c7f0d61 |
307 | fxp_error_message = msg; |
308 | fxp_errtype = -1; |
309 | } |
310 | |
32874aea |
311 | const char *fxp_error(void) |
312 | { |
4c7f0d61 |
313 | return fxp_error_message; |
314 | } |
315 | |
32874aea |
316 | int fxp_error_type(void) |
317 | { |
4c7f0d61 |
318 | return fxp_errtype; |
319 | } |
320 | |
321 | /* |
322 | * Perform exchange of init/version packets. Return 0 on failure. |
323 | */ |
32874aea |
324 | int fxp_init(void) |
325 | { |
4c7f0d61 |
326 | struct sftp_packet *pktout, *pktin; |
327 | int remotever; |
328 | |
329 | pktout = sftp_pkt_init(SSH_FXP_INIT); |
330 | sftp_pkt_adduint32(pktout, SFTP_PROTO_VERSION); |
331 | sftp_send(pktout); |
332 | |
333 | pktin = sftp_recv(); |
0d694692 |
334 | if (!pktin) { |
335 | fxp_internal_error("could not connect"); |
336 | return 0; |
337 | } |
4c7f0d61 |
338 | if (pktin->type != SSH_FXP_VERSION) { |
339 | fxp_internal_error("did not receive FXP_VERSION"); |
340 | return 0; |
341 | } |
342 | remotever = sftp_pkt_getuint32(pktin); |
343 | if (remotever > SFTP_PROTO_VERSION) { |
32874aea |
344 | fxp_internal_error |
345 | ("remote protocol is more advanced than we support"); |
4c7f0d61 |
346 | return 0; |
347 | } |
348 | /* |
349 | * In principle, this packet might also contain extension- |
350 | * string pairs. We should work through them and look for any |
351 | * we recognise. In practice we don't currently do so because |
352 | * we know we don't recognise _any_. |
353 | */ |
354 | sftp_pkt_free(pktin); |
355 | |
356 | return 1; |
357 | } |
358 | |
359 | /* |
f9e162aa |
360 | * Canonify a pathname. |
4c7f0d61 |
361 | */ |
32874aea |
362 | char *fxp_realpath(char *path) |
363 | { |
4c7f0d61 |
364 | struct sftp_packet *pktin, *pktout; |
365 | int id; |
366 | |
367 | pktout = sftp_pkt_init(SSH_FXP_REALPATH); |
368 | sftp_pkt_adduint32(pktout, 0x123); /* request id */ |
369 | sftp_pkt_addstring_start(pktout); |
370 | sftp_pkt_addstring_str(pktout, path); |
4c7f0d61 |
371 | sftp_send(pktout); |
372 | pktin = sftp_recv(); |
f65c4643 |
373 | if (!pktin) { |
374 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
375 | return NULL; |
376 | } |
4c7f0d61 |
377 | id = sftp_pkt_getuint32(pktin); |
378 | if (id != 0x123) { |
379 | fxp_internal_error("request ID mismatch\n"); |
380 | return NULL; |
381 | } |
382 | if (pktin->type == SSH_FXP_NAME) { |
383 | int count; |
384 | char *path; |
385 | int len; |
386 | |
387 | count = sftp_pkt_getuint32(pktin); |
388 | if (count != 1) { |
389 | fxp_internal_error("REALPATH returned name count != 1\n"); |
390 | return NULL; |
391 | } |
392 | sftp_pkt_getstring(pktin, &path, &len); |
393 | if (!path) { |
394 | fxp_internal_error("REALPATH returned malformed FXP_NAME\n"); |
395 | return NULL; |
396 | } |
397 | path = mkstr(path, len); |
398 | sftp_pkt_free(pktin); |
399 | return path; |
400 | } else { |
401 | fxp_got_status(pktin); |
402 | return NULL; |
403 | } |
404 | } |
405 | |
406 | /* |
407 | * Open a file. |
408 | */ |
32874aea |
409 | struct fxp_handle *fxp_open(char *path, int type) |
410 | { |
4c7f0d61 |
411 | struct sftp_packet *pktin, *pktout; |
412 | int id; |
413 | |
414 | pktout = sftp_pkt_init(SSH_FXP_OPEN); |
415 | sftp_pkt_adduint32(pktout, 0x567); /* request id */ |
416 | sftp_pkt_addstring(pktout, path); |
417 | sftp_pkt_adduint32(pktout, type); |
418 | sftp_pkt_adduint32(pktout, 0); /* (FIXME) empty ATTRS structure */ |
419 | sftp_send(pktout); |
420 | pktin = sftp_recv(); |
f65c4643 |
421 | if (!pktin) { |
422 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
423 | return NULL; |
424 | } |
4c7f0d61 |
425 | id = sftp_pkt_getuint32(pktin); |
426 | if (id != 0x567) { |
427 | fxp_internal_error("request ID mismatch\n"); |
428 | return NULL; |
429 | } |
430 | if (pktin->type == SSH_FXP_HANDLE) { |
4c7f0d61 |
431 | char *hstring; |
432 | struct fxp_handle *handle; |
433 | int len; |
434 | |
435 | sftp_pkt_getstring(pktin, &hstring, &len); |
436 | if (!hstring) { |
437 | fxp_internal_error("OPEN returned malformed FXP_HANDLE\n"); |
438 | return NULL; |
439 | } |
440 | handle = smalloc(sizeof(struct fxp_handle)); |
441 | handle->hstring = mkstr(hstring, len); |
f9e162aa |
442 | handle->hlen = len; |
4c7f0d61 |
443 | sftp_pkt_free(pktin); |
444 | return handle; |
445 | } else { |
446 | fxp_got_status(pktin); |
447 | return NULL; |
448 | } |
449 | } |
450 | |
451 | /* |
452 | * Open a directory. |
453 | */ |
32874aea |
454 | struct fxp_handle *fxp_opendir(char *path) |
455 | { |
4c7f0d61 |
456 | struct sftp_packet *pktin, *pktout; |
457 | int id; |
458 | |
459 | pktout = sftp_pkt_init(SSH_FXP_OPENDIR); |
460 | sftp_pkt_adduint32(pktout, 0x456); /* request id */ |
461 | sftp_pkt_addstring(pktout, path); |
462 | sftp_send(pktout); |
463 | pktin = sftp_recv(); |
f65c4643 |
464 | if (!pktin) { |
465 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
466 | return NULL; |
467 | } |
4c7f0d61 |
468 | id = sftp_pkt_getuint32(pktin); |
469 | if (id != 0x456) { |
470 | fxp_internal_error("request ID mismatch\n"); |
471 | return NULL; |
472 | } |
473 | if (pktin->type == SSH_FXP_HANDLE) { |
4c7f0d61 |
474 | char *hstring; |
475 | struct fxp_handle *handle; |
476 | int len; |
477 | |
478 | sftp_pkt_getstring(pktin, &hstring, &len); |
479 | if (!hstring) { |
480 | fxp_internal_error("OPENDIR returned malformed FXP_HANDLE\n"); |
481 | return NULL; |
482 | } |
483 | handle = smalloc(sizeof(struct fxp_handle)); |
484 | handle->hstring = mkstr(hstring, len); |
f9e162aa |
485 | handle->hlen = len; |
4c7f0d61 |
486 | sftp_pkt_free(pktin); |
487 | return handle; |
488 | } else { |
489 | fxp_got_status(pktin); |
490 | return NULL; |
491 | } |
492 | } |
493 | |
494 | /* |
495 | * Close a file/dir. |
496 | */ |
32874aea |
497 | void fxp_close(struct fxp_handle *handle) |
498 | { |
4c7f0d61 |
499 | struct sftp_packet *pktin, *pktout; |
500 | int id; |
501 | |
502 | pktout = sftp_pkt_init(SSH_FXP_CLOSE); |
503 | sftp_pkt_adduint32(pktout, 0x789); /* request id */ |
f9e162aa |
504 | sftp_pkt_addstring_start(pktout); |
505 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
4c7f0d61 |
506 | sftp_send(pktout); |
507 | pktin = sftp_recv(); |
f65c4643 |
508 | if (!pktin) { |
509 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
510 | return; |
511 | } |
4c7f0d61 |
512 | id = sftp_pkt_getuint32(pktin); |
513 | if (id != 0x789) { |
514 | fxp_internal_error("request ID mismatch\n"); |
515 | return; |
516 | } |
517 | fxp_got_status(pktin); |
518 | sfree(handle->hstring); |
519 | sfree(handle); |
520 | } |
521 | |
9954aaa3 |
522 | int fxp_mkdir(char *path) |
523 | { |
524 | struct sftp_packet *pktin, *pktout; |
525 | int id; |
526 | |
527 | pktout = sftp_pkt_init(SSH_FXP_MKDIR); |
528 | sftp_pkt_adduint32(pktout, 0x234); /* request id */ |
d92624dc |
529 | sftp_pkt_addstring(pktout, path); |
9954aaa3 |
530 | sftp_pkt_adduint32(pktout, 0); /* (FIXME) empty ATTRS structure */ |
531 | sftp_send(pktout); |
532 | pktin = sftp_recv(); |
f65c4643 |
533 | if (!pktin) { |
534 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
535 | return 0; |
536 | } |
9954aaa3 |
537 | id = sftp_pkt_getuint32(pktin); |
538 | if (id != 0x234) { |
539 | fxp_internal_error("request ID mismatch\n"); |
540 | return 0; |
541 | } |
542 | id = fxp_got_status(pktin); |
543 | if (id != 1) { |
544 | return 0; |
545 | } |
546 | return 1; |
547 | } |
548 | |
549 | int fxp_rmdir(char *path) |
550 | { |
551 | struct sftp_packet *pktin, *pktout; |
552 | int id; |
553 | |
554 | pktout = sftp_pkt_init(SSH_FXP_RMDIR); |
555 | sftp_pkt_adduint32(pktout, 0x345); /* request id */ |
d92624dc |
556 | sftp_pkt_addstring(pktout, path); |
9954aaa3 |
557 | sftp_send(pktout); |
558 | pktin = sftp_recv(); |
f65c4643 |
559 | if (!pktin) { |
560 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
561 | return 0; |
562 | } |
9954aaa3 |
563 | id = sftp_pkt_getuint32(pktin); |
564 | if (id != 0x345) { |
565 | fxp_internal_error("request ID mismatch\n"); |
566 | return 0; |
567 | } |
568 | id = fxp_got_status(pktin); |
569 | if (id != 1) { |
570 | return 0; |
571 | } |
572 | return 1; |
573 | } |
574 | |
d92624dc |
575 | int fxp_remove(char *fname) |
9954aaa3 |
576 | { |
577 | struct sftp_packet *pktin, *pktout; |
578 | int id; |
579 | |
580 | pktout = sftp_pkt_init(SSH_FXP_REMOVE); |
581 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
d92624dc |
582 | sftp_pkt_addstring(pktout, fname); |
583 | sftp_send(pktout); |
584 | pktin = sftp_recv(); |
f65c4643 |
585 | if (!pktin) { |
586 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
587 | return 0; |
588 | } |
d92624dc |
589 | id = sftp_pkt_getuint32(pktin); |
590 | if (id != 0x678) { |
591 | fxp_internal_error("request ID mismatch\n"); |
592 | return 0; |
593 | } |
594 | id = fxp_got_status(pktin); |
595 | if (id != 1) { |
596 | return 0; |
597 | } |
598 | return 1; |
599 | } |
600 | |
601 | int fxp_rename(char *srcfname, char *dstfname) |
602 | { |
603 | struct sftp_packet *pktin, *pktout; |
604 | int id; |
605 | |
606 | pktout = sftp_pkt_init(SSH_FXP_RENAME); |
607 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
608 | sftp_pkt_addstring(pktout, srcfname); |
609 | sftp_pkt_addstring(pktout, dstfname); |
610 | sftp_send(pktout); |
611 | pktin = sftp_recv(); |
f65c4643 |
612 | if (!pktin) { |
613 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
614 | return 0; |
615 | } |
d92624dc |
616 | id = sftp_pkt_getuint32(pktin); |
617 | if (id != 0x678) { |
618 | fxp_internal_error("request ID mismatch\n"); |
619 | return 0; |
620 | } |
621 | id = fxp_got_status(pktin); |
622 | if (id != 1) { |
623 | return 0; |
624 | } |
625 | return 1; |
626 | } |
627 | |
628 | /* |
629 | * Retrieve the attributes of a file. We have fxp_stat which works |
630 | * on filenames, and fxp_fstat which works on open file handles. |
631 | */ |
632 | int fxp_stat(char *fname, struct fxp_attrs *attrs) |
633 | { |
634 | struct sftp_packet *pktin, *pktout; |
635 | int id; |
636 | |
637 | pktout = sftp_pkt_init(SSH_FXP_STAT); |
638 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
639 | sftp_pkt_addstring(pktout, fname); |
640 | sftp_send(pktout); |
641 | pktin = sftp_recv(); |
f65c4643 |
642 | if (!pktin) { |
643 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
644 | return 0; |
645 | } |
d92624dc |
646 | id = sftp_pkt_getuint32(pktin); |
647 | if (id != 0x678) { |
648 | fxp_internal_error("request ID mismatch\n"); |
649 | return 0; |
650 | } |
651 | |
652 | if (pktin->type == SSH_FXP_ATTRS) { |
653 | *attrs = sftp_pkt_getattrs(pktin); |
654 | return 1; |
655 | } else { |
656 | fxp_got_status(pktin); |
657 | return 0; |
658 | } |
659 | } |
660 | |
661 | int fxp_fstat(struct fxp_handle *handle, struct fxp_attrs *attrs) |
662 | { |
663 | struct sftp_packet *pktin, *pktout; |
664 | int id; |
665 | |
666 | pktout = sftp_pkt_init(SSH_FXP_FSTAT); |
667 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
9954aaa3 |
668 | sftp_pkt_addstring_start(pktout); |
d92624dc |
669 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
670 | sftp_send(pktout); |
671 | pktin = sftp_recv(); |
f65c4643 |
672 | if (!pktin) { |
673 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
674 | return 0; |
675 | } |
d92624dc |
676 | id = sftp_pkt_getuint32(pktin); |
677 | if (id != 0x678) { |
678 | fxp_internal_error("request ID mismatch\n"); |
679 | return 0; |
680 | } |
681 | |
682 | if (pktin->type == SSH_FXP_ATTRS) { |
683 | *attrs = sftp_pkt_getattrs(pktin); |
684 | return 1; |
685 | } else { |
686 | fxp_got_status(pktin); |
687 | return 0; |
688 | } |
689 | } |
690 | |
691 | /* |
692 | * Set the attributes of a file. |
693 | */ |
694 | int fxp_setstat(char *fname, struct fxp_attrs attrs) |
695 | { |
696 | struct sftp_packet *pktin, *pktout; |
697 | int id; |
698 | |
699 | pktout = sftp_pkt_init(SSH_FXP_SETSTAT); |
700 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
701 | sftp_pkt_addstring(pktout, fname); |
702 | sftp_pkt_addattrs(pktout, attrs); |
9954aaa3 |
703 | sftp_send(pktout); |
704 | pktin = sftp_recv(); |
f65c4643 |
705 | if (!pktin) { |
706 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
707 | return 0; |
708 | } |
9954aaa3 |
709 | id = sftp_pkt_getuint32(pktin); |
710 | if (id != 0x678) { |
711 | fxp_internal_error("request ID mismatch\n"); |
712 | return 0; |
713 | } |
714 | id = fxp_got_status(pktin); |
715 | if (id != 1) { |
716 | return 0; |
717 | } |
718 | return 1; |
719 | } |
fd5e5847 |
720 | int fxp_fsetstat(struct fxp_handle *handle, struct fxp_attrs attrs) |
721 | { |
722 | struct sftp_packet *pktin, *pktout; |
723 | int id; |
724 | |
725 | pktout = sftp_pkt_init(SSH_FXP_FSETSTAT); |
726 | sftp_pkt_adduint32(pktout, 0x678); /* request id */ |
727 | sftp_pkt_addstring_start(pktout); |
728 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
729 | sftp_pkt_addattrs(pktout, attrs); |
730 | sftp_send(pktout); |
731 | pktin = sftp_recv(); |
f65c4643 |
732 | if (!pktin) { |
733 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
734 | return 0; |
735 | } |
fd5e5847 |
736 | id = sftp_pkt_getuint32(pktin); |
737 | if (id != 0x678) { |
738 | fxp_internal_error("request ID mismatch\n"); |
739 | return 0; |
740 | } |
741 | id = fxp_got_status(pktin); |
742 | if (id != 1) { |
743 | return 0; |
744 | } |
745 | return 1; |
746 | } |
9954aaa3 |
747 | |
4c7f0d61 |
748 | /* |
749 | * Read from a file. Returns the number of bytes read, or -1 on an |
750 | * error, or possibly 0 if EOF. (I'm not entirely sure whether it |
751 | * will return 0 on EOF, or return -1 and store SSH_FX_EOF in the |
752 | * error indicator. It might even depend on the SFTP server.) |
753 | */ |
32874aea |
754 | int fxp_read(struct fxp_handle *handle, char *buffer, uint64 offset, |
755 | int len) |
756 | { |
4c7f0d61 |
757 | struct sftp_packet *pktin, *pktout; |
758 | int id; |
759 | |
760 | pktout = sftp_pkt_init(SSH_FXP_READ); |
761 | sftp_pkt_adduint32(pktout, 0xBCD); /* request id */ |
f9e162aa |
762 | sftp_pkt_addstring_start(pktout); |
763 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
4c7f0d61 |
764 | sftp_pkt_adduint64(pktout, offset); |
765 | sftp_pkt_adduint32(pktout, len); |
766 | sftp_send(pktout); |
767 | pktin = sftp_recv(); |
f65c4643 |
768 | if (!pktin) { |
769 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
770 | return -1; |
771 | } |
4c7f0d61 |
772 | id = sftp_pkt_getuint32(pktin); |
773 | if (id != 0xBCD) { |
774 | fxp_internal_error("request ID mismatch"); |
4a8fc3c4 |
775 | return -1; |
4c7f0d61 |
776 | } |
777 | if (pktin->type == SSH_FXP_DATA) { |
778 | char *str; |
779 | int rlen; |
780 | |
781 | sftp_pkt_getstring(pktin, &str, &rlen); |
782 | |
783 | if (rlen > len || rlen < 0) { |
784 | fxp_internal_error("READ returned more bytes than requested"); |
785 | return -1; |
786 | } |
787 | |
788 | memcpy(buffer, str, rlen); |
789 | sfree(pktin); |
790 | return rlen; |
791 | } else { |
792 | fxp_got_status(pktin); |
793 | return -1; |
794 | } |
795 | } |
796 | |
797 | /* |
798 | * Read from a directory. |
799 | */ |
32874aea |
800 | struct fxp_names *fxp_readdir(struct fxp_handle *handle) |
801 | { |
4c7f0d61 |
802 | struct sftp_packet *pktin, *pktout; |
803 | int id; |
804 | |
805 | pktout = sftp_pkt_init(SSH_FXP_READDIR); |
806 | sftp_pkt_adduint32(pktout, 0xABC); /* request id */ |
f9e162aa |
807 | sftp_pkt_addstring_start(pktout); |
808 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
4c7f0d61 |
809 | sftp_send(pktout); |
810 | pktin = sftp_recv(); |
f65c4643 |
811 | if (!pktin) { |
812 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
813 | return NULL; |
814 | } |
4c7f0d61 |
815 | id = sftp_pkt_getuint32(pktin); |
816 | if (id != 0xABC) { |
817 | fxp_internal_error("request ID mismatch\n"); |
4a8fc3c4 |
818 | return NULL; |
4c7f0d61 |
819 | } |
820 | if (pktin->type == SSH_FXP_NAME) { |
821 | struct fxp_names *ret; |
822 | int i; |
823 | ret = smalloc(sizeof(struct fxp_names)); |
824 | ret->nnames = sftp_pkt_getuint32(pktin); |
825 | ret->names = smalloc(ret->nnames * sizeof(struct fxp_name)); |
826 | for (i = 0; i < ret->nnames; i++) { |
827 | char *str; |
828 | int len; |
829 | sftp_pkt_getstring(pktin, &str, &len); |
830 | ret->names[i].filename = mkstr(str, len); |
831 | sftp_pkt_getstring(pktin, &str, &len); |
832 | ret->names[i].longname = mkstr(str, len); |
833 | ret->names[i].attrs = sftp_pkt_getattrs(pktin); |
834 | } |
835 | return ret; |
836 | } else { |
837 | fxp_got_status(pktin); |
838 | return NULL; |
839 | } |
840 | } |
841 | |
842 | /* |
843 | * Write to a file. Returns 0 on error, 1 on OK. |
844 | */ |
32874aea |
845 | int fxp_write(struct fxp_handle *handle, char *buffer, uint64 offset, |
846 | int len) |
847 | { |
4c7f0d61 |
848 | struct sftp_packet *pktin, *pktout; |
849 | int id; |
850 | |
851 | pktout = sftp_pkt_init(SSH_FXP_WRITE); |
852 | sftp_pkt_adduint32(pktout, 0xDCB); /* request id */ |
f9e162aa |
853 | sftp_pkt_addstring_start(pktout); |
854 | sftp_pkt_addstring_data(pktout, handle->hstring, handle->hlen); |
4c7f0d61 |
855 | sftp_pkt_adduint64(pktout, offset); |
856 | sftp_pkt_addstring_start(pktout); |
857 | sftp_pkt_addstring_data(pktout, buffer, len); |
858 | sftp_send(pktout); |
859 | pktin = sftp_recv(); |
f65c4643 |
860 | if (!pktin) { |
861 | fxp_internal_error("did not receive a valid SFTP packet\n"); |
862 | return 0; |
863 | } |
4c7f0d61 |
864 | id = sftp_pkt_getuint32(pktin); |
4a8fc3c4 |
865 | if (id != 0xDCB) { |
866 | fxp_internal_error("request ID mismatch\n"); |
d8770b12 |
867 | return 0; |
4a8fc3c4 |
868 | } |
4c7f0d61 |
869 | fxp_got_status(pktin); |
870 | return fxp_errtype == SSH_FX_OK; |
871 | } |
872 | |
873 | /* |
874 | * Free up an fxp_names structure. |
875 | */ |
32874aea |
876 | void fxp_free_names(struct fxp_names *names) |
877 | { |
4c7f0d61 |
878 | int i; |
879 | |
880 | for (i = 0; i < names->nnames; i++) { |
881 | sfree(names->names[i].filename); |
882 | sfree(names->names[i].longname); |
883 | } |
884 | sfree(names->names); |
885 | sfree(names); |
886 | } |