2 * winstore.c: Windows-specific implementation of the interface
3 * defined in storage.h.
11 static const char *const puttystr = PUTTY_REG_POS "\\Sessions";
13 static char seedpath[2*MAX_PATH+10] = "\0";
15 static char hex[16] = "0123456789ABCDEF";
17 static void mungestr(char *in, char *out) {
21 if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' ||
22 *in == '%' || *in < ' ' || *in > '~' || (*in == '.' && !candot)) {
24 *out++ = hex[((unsigned char)*in) >> 4];
25 *out++ = hex[((unsigned char)*in) & 15];
35 static void unmungestr(char *in, char *out, int outlen) {
37 if (*in == '%' && in[1] && in[2]) {
40 i = in[1] - '0'; i -= (i > 9 ? 7 : 0);
41 j = in[2] - '0'; j -= (j > 9 ? 7 : 0);
44 if (!--outlen) return;
48 if (!--outlen) return;
55 void *open_settings_w(char *sessionname) {
56 HKEY subkey1, sesskey;
60 p = malloc(3*strlen(sessionname)+1);
61 mungestr(sessionname, p);
63 ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1);
64 if (ret != ERROR_SUCCESS) {
68 ret = RegCreateKey(subkey1, p, &sesskey);
71 if (ret != ERROR_SUCCESS)
73 return (void *)sesskey;
76 void write_setting_s(void *handle, char *key, char *value) {
78 RegSetValueEx((HKEY)handle, key, 0, REG_SZ, value, 1+strlen(value));
81 void write_setting_i(void *handle, char *key, int value) {
83 RegSetValueEx((HKEY)handle, key, 0, REG_DWORD,
84 (CONST BYTE *)&value, sizeof(value));
87 void close_settings_w(void *handle) {
88 RegCloseKey((HKEY)handle);
91 void *open_settings_r(char *sessionname) {
92 HKEY subkey1, sesskey;
95 p = malloc(3*strlen(sessionname)+1);
96 mungestr(sessionname, p);
98 if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) {
101 if (RegOpenKey(subkey1, p, &sesskey) != ERROR_SUCCESS) {
104 RegCloseKey(subkey1);
109 return (void *)sesskey;
112 char *read_setting_s(void *handle, char *key, char *buffer, int buflen) {
117 RegQueryValueEx((HKEY)handle, key, 0,
118 &type, buffer, &size) != ERROR_SUCCESS ||
125 int read_setting_i(void *handle, char *key, int defvalue) {
126 DWORD type, val, size;
130 RegQueryValueEx((HKEY)handle, key, 0, &type,
131 (BYTE *)&val, &size) != ERROR_SUCCESS ||
132 size != sizeof(val) || type != REG_DWORD)
138 void close_settings_r(void *handle) {
139 RegCloseKey((HKEY)handle);
142 void del_settings (char *sessionname) {
146 if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS)
149 p = malloc(3*strlen(sessionname)+1);
150 mungestr(sessionname, p);
151 RegDeleteKey(subkey1, p);
154 RegCloseKey(subkey1);
157 static void hostkey_regname(char *buffer, char *hostname, char *keytype) {
158 strcpy(buffer, keytype);
160 mungestr(hostname, buffer + strlen(buffer));
163 struct enumsettings {
168 void *enum_settings_start(void) {
169 struct enumsettings *ret;
172 if (RegCreateKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS)
175 ret = malloc(sizeof(*ret));
184 char *enum_settings_next(void *handle, char *buffer, int buflen) {
185 struct enumsettings *e = (struct enumsettings *)handle;
187 otherbuf = malloc(3*buflen);
188 if (otherbuf && RegEnumKey(e->key, e->i++, otherbuf,
189 3*buflen) == ERROR_SUCCESS) {
190 unmungestr(otherbuf, buffer, buflen);
198 void enum_settings_finish(void *handle) {
199 struct enumsettings *e = (struct enumsettings *)handle;
204 int verify_host_key(char *hostname, char *keytype, char *key) {
205 char *otherstr, *regname;
212 len = 1 + strlen(key);
215 * Now read a saved key in from the registry and see what it
218 otherstr = smalloc(len);
219 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+5);
220 if (!otherstr || !regname)
221 fatalbox("Out of memory");
223 hostkey_regname(regname, hostname, keytype);
225 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
226 &rkey) != ERROR_SUCCESS)
227 return 1; /* key does not exist in registry */
230 ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen);
232 if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA &&
233 !strcmp(keytype, "rsa")) {
235 * Key didn't exist. If the key type is RSA, we'll try
236 * another trick, which is to look up the _old_ key format
237 * under just the hostname and translate that.
239 char *justhost = regname + 1 + strlen(keytype);
240 char *oldstyle = smalloc(len + 10); /* safety margin */
242 ret = RegQueryValueEx(rkey, justhost, NULL, &type,
245 if (ret == ERROR_SUCCESS && type == REG_SZ) {
247 * The old format is two old-style bignums separated by
248 * a slash. An old-style bignum is made of groups of
249 * four hex digits: digits are ordered in sensible
250 * (most to least significant) order within each group,
251 * but groups are ordered in silly (least to most)
252 * order within the bignum. The new format is two
253 * ordinary C-format hex numbers (0xABCDEFG...XYZ, with
254 * A nonzero except in the special case 0x0, which
255 * doesn't appear anyway in RSA keys) separated by a
256 * comma. All hex digits are lowercase in both formats.
262 for (i = 0; i < 2; i++) {
264 *p++ = '0'; *p++ = 'x';
265 ndigits = strcspn(q, "/"); /* find / or end of string */
266 nwords = ndigits / 4;
267 /* now trim ndigits to remove leading zeros */
268 while (q[ (ndigits-1) ^ 3 ] == '0' && ndigits > 1)
270 /* now move digits over to new string */
271 for (j = 0; j < ndigits; j++)
272 p[ndigits-1-j] = q[j^3];
276 q++; /* eat the slash */
277 *p++ = ','; /* add a comma */
279 *p = '\0'; /* terminate the string */
283 * Now _if_ this key matches, we'll enter it in the new
284 * format. If not, we'll assume something odd went
285 * wrong, and hyper-cautiously do nothing.
287 if (!strcmp(otherstr, key))
288 RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr,
295 compare = strcmp(otherstr, key);
300 if (ret == ERROR_MORE_DATA ||
301 (ret == ERROR_SUCCESS && type == REG_SZ && compare))
302 return 2; /* key is different in registry */
303 else if (ret != ERROR_SUCCESS || type != REG_SZ)
304 return 1; /* key does not exist in registry */
306 return 0; /* key matched OK in registry */
309 void store_host_key(char *hostname, char *keytype, char *key) {
313 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+5);
315 fatalbox("Out of memory");
317 hostkey_regname(regname, hostname, keytype);
319 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
320 &rkey) != ERROR_SUCCESS)
321 return; /* key does not exist in registry */
322 RegSetValueEx(rkey, regname, 0, REG_SZ, key,
328 * Find the random seed file path and store it in `seedpath'.
330 static void get_seedpath(void) {
334 size = sizeof(seedpath);
336 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey)==ERROR_SUCCESS) {
337 int ret = RegQueryValueEx(rkey, "RandSeedFile",
338 0, &type, seedpath, &size);
339 if (ret != ERROR_SUCCESS || type != REG_SZ)
348 len = GetEnvironmentVariable("HOMEDRIVE", seedpath, sizeof(seedpath));
349 ret = GetEnvironmentVariable("HOMEPATH", seedpath+len,
350 sizeof(seedpath)-len);
351 if (ret == 0) { /* probably win95; store in \WINDOWS */
352 GetWindowsDirectory(seedpath, sizeof(seedpath));
353 len = strlen(seedpath);
356 strcpy(seedpath+len, "\\PUTTY.RND");
360 void read_random_seed(noise_consumer_t consumer) {
366 seedf = CreateFile(seedpath, GENERIC_READ,
367 FILE_SHARE_READ | FILE_SHARE_WRITE,
368 NULL, OPEN_EXISTING, 0, NULL);
370 if (seedf != INVALID_HANDLE_VALUE) {
375 if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len)
384 void write_random_seed(void *data, int len) {
390 seedf = CreateFile(seedpath, GENERIC_WRITE, 0,
391 NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
393 if (seedf != INVALID_HANDLE_VALUE) {
396 WriteFile(seedf, data, len, &lenwritten, NULL);
402 * Recursively delete a registry key and everything under it.
404 static void registry_recursive_remove(HKEY key) {
406 char name[MAX_PATH+1];
410 while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) {
411 if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) {
412 registry_recursive_remove(subkey);
415 RegDeleteKey(key, name);
419 void cleanup_all(void) {
422 char name[MAX_PATH+1];
424 /* ------------------------------------------------------------
425 * Wipe out the random seed file.
431 /* ------------------------------------------------------------
432 * Destroy all registry information associated with PuTTY.
436 * Open the main PuTTY registry key and remove everything in it.
438 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == ERROR_SUCCESS) {
439 registry_recursive_remove(key);
443 * Now open the parent key and remove the PuTTY main key. Once
444 * we've done that, see if the parent key has any other
447 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT,
448 &key) == ERROR_SUCCESS) {
449 RegDeleteKey(key, PUTTY_REG_PARENT_CHILD);
450 ret = RegEnumKey(key, 0, name, sizeof(name));
453 * If the parent key had no other children, we must delete
454 * it in its turn. That means opening the _grandparent_
457 if (ret != ERROR_SUCCESS) {
458 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT,
459 &key) == ERROR_SUCCESS) {
460 RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD);