d5859615 |
1 | /* |
2 | * winstore.c: Windows-specific implementation of the interface |
3 | * defined in storage.h. |
4 | */ |
5 | |
6 | #include <windows.h> |
7 | #include <stdio.h> |
49bad831 |
8 | #include <stdlib.h> |
d5859615 |
9 | #include "putty.h" |
10 | #include "storage.h" |
11 | |
d1622aed |
12 | static const char *const puttystr = PUTTY_REG_POS "\\Sessions"; |
13 | |
32874aea |
14 | static char seedpath[2 * MAX_PATH + 10] = "\0"; |
d5859615 |
15 | |
c85623f9 |
16 | static const char hex[16] = "0123456789ABCDEF"; |
d5859615 |
17 | |
c85623f9 |
18 | static void mungestr(const char *in, char *out) |
32874aea |
19 | { |
d5859615 |
20 | int candot = 0; |
21 | |
22 | while (*in) { |
23 | if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' || |
32874aea |
24 | *in == '%' || *in < ' ' || *in > '~' || (*in == '.' |
25 | && !candot)) { |
d5859615 |
26 | *out++ = '%'; |
32874aea |
27 | *out++ = hex[((unsigned char) *in) >> 4]; |
28 | *out++ = hex[((unsigned char) *in) & 15]; |
d5859615 |
29 | } else |
30 | *out++ = *in; |
31 | in++; |
32 | candot = 1; |
33 | } |
34 | *out = '\0'; |
35 | return; |
36 | } |
37 | |
c85623f9 |
38 | static void unmungestr(const char *in, char *out, int outlen) |
32874aea |
39 | { |
d5859615 |
40 | while (*in) { |
41 | if (*in == '%' && in[1] && in[2]) { |
42 | int i, j; |
43 | |
32874aea |
44 | i = in[1] - '0'; |
45 | i -= (i > 9 ? 7 : 0); |
46 | j = in[2] - '0'; |
47 | j -= (j > 9 ? 7 : 0); |
d5859615 |
48 | |
32874aea |
49 | *out++ = (i << 4) + j; |
50 | if (!--outlen) |
51 | return; |
d5859615 |
52 | in += 3; |
d1622aed |
53 | } else { |
d5859615 |
54 | *out++ = *in++; |
32874aea |
55 | if (!--outlen) |
56 | return; |
57 | } |
d5859615 |
58 | } |
59 | *out = '\0'; |
60 | return; |
61 | } |
62 | |
c85623f9 |
63 | void *open_settings_w(const char *sessionname) |
32874aea |
64 | { |
d1622aed |
65 | HKEY subkey1, sesskey; |
66 | int ret; |
67 | char *p; |
68 | |
32874aea |
69 | p = smalloc(3 * strlen(sessionname) + 1); |
d1622aed |
70 | mungestr(sessionname, p); |
32874aea |
71 | |
d1622aed |
72 | ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1); |
73 | if (ret != ERROR_SUCCESS) { |
32874aea |
74 | sfree(p); |
75 | return NULL; |
d1622aed |
76 | } |
77 | ret = RegCreateKey(subkey1, p, &sesskey); |
dcbde236 |
78 | sfree(p); |
d1622aed |
79 | RegCloseKey(subkey1); |
80 | if (ret != ERROR_SUCCESS) |
32874aea |
81 | return NULL; |
82 | return (void *) sesskey; |
d1622aed |
83 | } |
84 | |
c85623f9 |
85 | void write_setting_s(void *handle, const char *key, const char *value) |
32874aea |
86 | { |
d1622aed |
87 | if (handle) |
32874aea |
88 | RegSetValueEx((HKEY) handle, key, 0, REG_SZ, value, |
89 | 1 + strlen(value)); |
d1622aed |
90 | } |
91 | |
c85623f9 |
92 | void write_setting_i(void *handle, const char *key, int value) |
32874aea |
93 | { |
d1622aed |
94 | if (handle) |
32874aea |
95 | RegSetValueEx((HKEY) handle, key, 0, REG_DWORD, |
96 | (CONST BYTE *) & value, sizeof(value)); |
d1622aed |
97 | } |
98 | |
32874aea |
99 | void close_settings_w(void *handle) |
100 | { |
101 | RegCloseKey((HKEY) handle); |
d1622aed |
102 | } |
103 | |
c85623f9 |
104 | void *open_settings_r(const char *sessionname) |
32874aea |
105 | { |
d1622aed |
106 | HKEY subkey1, sesskey; |
107 | char *p; |
108 | |
32874aea |
109 | p = smalloc(3 * strlen(sessionname) + 1); |
d1622aed |
110 | mungestr(sessionname, p); |
111 | |
112 | if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) { |
113 | sesskey = NULL; |
114 | } else { |
115 | if (RegOpenKey(subkey1, p, &sesskey) != ERROR_SUCCESS) { |
116 | sesskey = NULL; |
117 | } |
118 | RegCloseKey(subkey1); |
119 | } |
120 | |
dcbde236 |
121 | sfree(p); |
d1622aed |
122 | |
32874aea |
123 | return (void *) sesskey; |
d1622aed |
124 | } |
125 | |
c85623f9 |
126 | char *read_setting_s(void *handle, const char *key, char *buffer, int buflen) |
32874aea |
127 | { |
d1622aed |
128 | DWORD type, size; |
129 | size = buflen; |
130 | |
131 | if (!handle || |
32874aea |
132 | RegQueryValueEx((HKEY) handle, key, 0, |
133 | &type, buffer, &size) != ERROR_SUCCESS || |
134 | type != REG_SZ) return NULL; |
d1622aed |
135 | else |
32874aea |
136 | return buffer; |
d1622aed |
137 | } |
d5859615 |
138 | |
c85623f9 |
139 | int read_setting_i(void *handle, const char *key, int defvalue) |
32874aea |
140 | { |
d1622aed |
141 | DWORD type, val, size; |
142 | size = sizeof(val); |
143 | |
144 | if (!handle || |
32874aea |
145 | RegQueryValueEx((HKEY) handle, key, 0, &type, |
146 | (BYTE *) & val, &size) != ERROR_SUCCESS || |
d1622aed |
147 | size != sizeof(val) || type != REG_DWORD) |
148 | return defvalue; |
149 | else |
150 | return val; |
151 | } |
152 | |
32874aea |
153 | void close_settings_r(void *handle) |
154 | { |
155 | RegCloseKey((HKEY) handle); |
d1622aed |
156 | } |
157 | |
c85623f9 |
158 | void del_settings(const char *sessionname) |
32874aea |
159 | { |
d1622aed |
160 | HKEY subkey1; |
161 | char *p; |
162 | |
163 | if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) |
164 | return; |
165 | |
32874aea |
166 | p = smalloc(3 * strlen(sessionname) + 1); |
d1622aed |
167 | mungestr(sessionname, p); |
168 | RegDeleteKey(subkey1, p); |
dcbde236 |
169 | sfree(p); |
d1622aed |
170 | |
171 | RegCloseKey(subkey1); |
172 | } |
d5859615 |
173 | |
d1622aed |
174 | struct enumsettings { |
175 | HKEY key; |
176 | int i; |
177 | }; |
178 | |
32874aea |
179 | void *enum_settings_start(void) |
180 | { |
d1622aed |
181 | struct enumsettings *ret; |
182 | HKEY key; |
183 | |
5f2df4d2 |
184 | if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS) |
32874aea |
185 | return NULL; |
d1622aed |
186 | |
dcbde236 |
187 | ret = smalloc(sizeof(*ret)); |
d1622aed |
188 | if (ret) { |
32874aea |
189 | ret->key = key; |
190 | ret->i = 0; |
d1622aed |
191 | } |
192 | |
193 | return ret; |
194 | } |
195 | |
32874aea |
196 | char *enum_settings_next(void *handle, char *buffer, int buflen) |
197 | { |
198 | struct enumsettings *e = (struct enumsettings *) handle; |
d1622aed |
199 | char *otherbuf; |
32874aea |
200 | otherbuf = smalloc(3 * buflen); |
60371ab3 |
201 | if (RegEnumKey(e->key, e->i++, otherbuf, 3 * buflen) == ERROR_SUCCESS) { |
32874aea |
202 | unmungestr(otherbuf, buffer, buflen); |
203 | sfree(otherbuf); |
204 | return buffer; |
60371ab3 |
205 | } else { |
206 | sfree(otherbuf); |
32874aea |
207 | return NULL; |
60371ab3 |
208 | } |
d1622aed |
209 | } |
210 | |
32874aea |
211 | void enum_settings_finish(void *handle) |
212 | { |
213 | struct enumsettings *e = (struct enumsettings *) handle; |
d1622aed |
214 | RegCloseKey(e->key); |
dcbde236 |
215 | sfree(e); |
d1622aed |
216 | } |
217 | |
c85623f9 |
218 | static void hostkey_regname(char *buffer, const char *hostname, |
219 | int port, const char *keytype) |
32874aea |
220 | { |
d4857987 |
221 | int len; |
222 | strcpy(buffer, keytype); |
223 | strcat(buffer, "@"); |
224 | len = strlen(buffer); |
32874aea |
225 | len += sprintf(buffer + len, "%d:", port); |
d4857987 |
226 | mungestr(hostname, buffer + strlen(buffer)); |
227 | } |
228 | |
c85623f9 |
229 | int verify_host_key(const char *hostname, int port, |
230 | const char *keytype, const char *key) |
32874aea |
231 | { |
d5859615 |
232 | char *otherstr, *regname; |
233 | int len; |
234 | HKEY rkey; |
235 | DWORD readlen; |
236 | DWORD type; |
237 | int ret, compare; |
238 | |
239 | len = 1 + strlen(key); |
240 | |
241 | /* |
242 | * Now read a saved key in from the registry and see what it |
243 | * says. |
244 | */ |
245 | otherstr = smalloc(len); |
32874aea |
246 | regname = smalloc(3 * (strlen(hostname) + strlen(keytype)) + 15); |
d5859615 |
247 | |
d4857987 |
248 | hostkey_regname(regname, hostname, port, keytype); |
d5859615 |
249 | |
5f2df4d2 |
250 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", |
251 | &rkey) != ERROR_SUCCESS) |
32874aea |
252 | return 1; /* key does not exist in registry */ |
d5859615 |
253 | |
254 | readlen = len; |
255 | ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen); |
256 | |
257 | if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA && |
32874aea |
258 | !strcmp(keytype, "rsa")) { |
259 | /* |
260 | * Key didn't exist. If the key type is RSA, we'll try |
261 | * another trick, which is to look up the _old_ key format |
262 | * under just the hostname and translate that. |
263 | */ |
264 | char *justhost = regname + 1 + strcspn(regname, ":"); |
265 | char *oldstyle = smalloc(len + 10); /* safety margin */ |
266 | readlen = len; |
267 | ret = RegQueryValueEx(rkey, justhost, NULL, &type, |
268 | oldstyle, &readlen); |
269 | |
270 | if (ret == ERROR_SUCCESS && type == REG_SZ) { |
271 | /* |
272 | * The old format is two old-style bignums separated by |
273 | * a slash. An old-style bignum is made of groups of |
274 | * four hex digits: digits are ordered in sensible |
275 | * (most to least significant) order within each group, |
276 | * but groups are ordered in silly (least to most) |
277 | * order within the bignum. The new format is two |
278 | * ordinary C-format hex numbers (0xABCDEFG...XYZ, with |
279 | * A nonzero except in the special case 0x0, which |
280 | * doesn't appear anyway in RSA keys) separated by a |
281 | * comma. All hex digits are lowercase in both formats. |
282 | */ |
283 | char *p = otherstr; |
284 | char *q = oldstyle; |
285 | int i, j; |
286 | |
287 | for (i = 0; i < 2; i++) { |
288 | int ndigits, nwords; |
289 | *p++ = '0'; |
290 | *p++ = 'x'; |
291 | ndigits = strcspn(q, "/"); /* find / or end of string */ |
292 | nwords = ndigits / 4; |
293 | /* now trim ndigits to remove leading zeros */ |
294 | while (q[(ndigits - 1) ^ 3] == '0' && ndigits > 1) |
295 | ndigits--; |
296 | /* now move digits over to new string */ |
297 | for (j = 0; j < ndigits; j++) |
298 | p[ndigits - 1 - j] = q[j ^ 3]; |
299 | p += ndigits; |
300 | q += nwords * 4; |
301 | if (*q) { |
302 | q++; /* eat the slash */ |
303 | *p++ = ','; /* add a comma */ |
304 | } |
305 | *p = '\0'; /* terminate the string */ |
306 | } |
307 | |
308 | /* |
309 | * Now _if_ this key matches, we'll enter it in the new |
310 | * format. If not, we'll assume something odd went |
311 | * wrong, and hyper-cautiously do nothing. |
312 | */ |
313 | if (!strcmp(otherstr, key)) |
314 | RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr, |
315 | strlen(otherstr) + 1); |
316 | } |
d5859615 |
317 | } |
318 | |
319 | RegCloseKey(rkey); |
320 | |
321 | compare = strcmp(otherstr, key); |
322 | |
323 | sfree(otherstr); |
324 | sfree(regname); |
325 | |
326 | if (ret == ERROR_MORE_DATA || |
32874aea |
327 | (ret == ERROR_SUCCESS && type == REG_SZ && compare)) |
328 | return 2; /* key is different in registry */ |
d5859615 |
329 | else if (ret != ERROR_SUCCESS || type != REG_SZ) |
32874aea |
330 | return 1; /* key does not exist in registry */ |
d5859615 |
331 | else |
32874aea |
332 | return 0; /* key matched OK in registry */ |
d5859615 |
333 | } |
334 | |
c85623f9 |
335 | void store_host_key(const char *hostname, int port, |
336 | const char *keytype, const char *key) |
32874aea |
337 | { |
d5859615 |
338 | char *regname; |
339 | HKEY rkey; |
340 | |
32874aea |
341 | regname = smalloc(3 * (strlen(hostname) + strlen(keytype)) + 15); |
d5859615 |
342 | |
d4857987 |
343 | hostkey_regname(regname, hostname, port, keytype); |
d5859615 |
344 | |
345 | if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", |
346 | &rkey) != ERROR_SUCCESS) |
32874aea |
347 | return; /* key does not exist in registry */ |
348 | RegSetValueEx(rkey, regname, 0, REG_SZ, key, strlen(key) + 1); |
d5859615 |
349 | RegCloseKey(rkey); |
350 | } |
351 | |
352 | /* |
353 | * Find the random seed file path and store it in `seedpath'. |
354 | */ |
32874aea |
355 | static void get_seedpath(void) |
356 | { |
d5859615 |
357 | HKEY rkey; |
358 | DWORD type, size; |
359 | |
360 | size = sizeof(seedpath); |
361 | |
32874aea |
362 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey) == |
363 | ERROR_SUCCESS) { |
d5859615 |
364 | int ret = RegQueryValueEx(rkey, "RandSeedFile", |
365 | 0, &type, seedpath, &size); |
366 | if (ret != ERROR_SUCCESS || type != REG_SZ) |
367 | seedpath[0] = '\0'; |
368 | RegCloseKey(rkey); |
369 | } else |
370 | seedpath[0] = '\0'; |
371 | |
372 | if (!seedpath[0]) { |
373 | int len, ret; |
374 | |
32874aea |
375 | len = |
376 | GetEnvironmentVariable("HOMEDRIVE", seedpath, |
377 | sizeof(seedpath)); |
378 | ret = |
379 | GetEnvironmentVariable("HOMEPATH", seedpath + len, |
380 | sizeof(seedpath) - len); |
d5859615 |
381 | if (ret == 0) { /* probably win95; store in \WINDOWS */ |
382 | GetWindowsDirectory(seedpath, sizeof(seedpath)); |
383 | len = strlen(seedpath); |
384 | } else |
385 | len += ret; |
32874aea |
386 | strcpy(seedpath + len, "\\PUTTY.RND"); |
d5859615 |
387 | } |
388 | } |
389 | |
32874aea |
390 | void read_random_seed(noise_consumer_t consumer) |
391 | { |
d5859615 |
392 | HANDLE seedf; |
393 | |
394 | if (!seedpath[0]) |
395 | get_seedpath(); |
396 | |
397 | seedf = CreateFile(seedpath, GENERIC_READ, |
398 | FILE_SHARE_READ | FILE_SHARE_WRITE, |
399 | NULL, OPEN_EXISTING, 0, NULL); |
400 | |
401 | if (seedf != INVALID_HANDLE_VALUE) { |
402 | while (1) { |
403 | char buf[1024]; |
404 | DWORD len; |
405 | |
406 | if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len) |
32874aea |
407 | consumer(buf, len); |
d5859615 |
408 | else |
409 | break; |
410 | } |
411 | CloseHandle(seedf); |
412 | } |
413 | } |
414 | |
32874aea |
415 | void write_random_seed(void *data, int len) |
416 | { |
d5859615 |
417 | HANDLE seedf; |
418 | |
419 | if (!seedpath[0]) |
420 | get_seedpath(); |
421 | |
422 | seedf = CreateFile(seedpath, GENERIC_WRITE, 0, |
423 | NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); |
424 | |
425 | if (seedf != INVALID_HANDLE_VALUE) { |
426 | DWORD lenwritten; |
427 | |
428 | WriteFile(seedf, data, len, &lenwritten, NULL); |
429 | CloseHandle(seedf); |
430 | } |
431 | } |
432 | |
433 | /* |
434 | * Recursively delete a registry key and everything under it. |
435 | */ |
32874aea |
436 | static void registry_recursive_remove(HKEY key) |
437 | { |
d5859615 |
438 | DWORD i; |
32874aea |
439 | char name[MAX_PATH + 1]; |
d5859615 |
440 | HKEY subkey; |
441 | |
442 | i = 0; |
443 | while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) { |
32874aea |
444 | if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) { |
445 | registry_recursive_remove(subkey); |
446 | RegCloseKey(subkey); |
447 | } |
448 | RegDeleteKey(key, name); |
d5859615 |
449 | } |
450 | } |
451 | |
32874aea |
452 | void cleanup_all(void) |
453 | { |
d5859615 |
454 | HKEY key; |
455 | int ret; |
32874aea |
456 | char name[MAX_PATH + 1]; |
d5859615 |
457 | |
458 | /* ------------------------------------------------------------ |
459 | * Wipe out the random seed file. |
460 | */ |
461 | if (!seedpath[0]) |
462 | get_seedpath(); |
463 | remove(seedpath); |
464 | |
465 | /* ------------------------------------------------------------ |
466 | * Destroy all registry information associated with PuTTY. |
467 | */ |
468 | |
469 | /* |
470 | * Open the main PuTTY registry key and remove everything in it. |
471 | */ |
32874aea |
472 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == |
473 | ERROR_SUCCESS) { |
474 | registry_recursive_remove(key); |
475 | RegCloseKey(key); |
d5859615 |
476 | } |
477 | /* |
478 | * Now open the parent key and remove the PuTTY main key. Once |
479 | * we've done that, see if the parent key has any other |
480 | * children. |
481 | */ |
482 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT, |
32874aea |
483 | &key) == ERROR_SUCCESS) { |
484 | RegDeleteKey(key, PUTTY_REG_PARENT_CHILD); |
485 | ret = RegEnumKey(key, 0, name, sizeof(name)); |
486 | RegCloseKey(key); |
487 | /* |
488 | * If the parent key had no other children, we must delete |
489 | * it in its turn. That means opening the _grandparent_ |
490 | * key. |
491 | */ |
492 | if (ret != ERROR_SUCCESS) { |
493 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT, |
494 | &key) == ERROR_SUCCESS) { |
495 | RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD); |
496 | RegCloseKey(key); |
497 | } |
498 | } |
d5859615 |
499 | } |
500 | /* |
501 | * Now we're done. |
502 | */ |
503 | } |