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 struct enumsettings {
162 void *enum_settings_start(void) {
163 struct enumsettings *ret;
166 if (RegCreateKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS)
169 ret = malloc(sizeof(*ret));
178 char *enum_settings_next(void *handle, char *buffer, int buflen) {
179 struct enumsettings *e = (struct enumsettings *)handle;
181 otherbuf = malloc(3*buflen);
182 if (otherbuf && RegEnumKey(e->key, e->i++, otherbuf,
183 3*buflen) == ERROR_SUCCESS) {
184 unmungestr(otherbuf, buffer, buflen);
192 void enum_settings_finish(void *handle) {
193 struct enumsettings *e = (struct enumsettings *)handle;
198 static void hostkey_regname(char *buffer, char *hostname,
199 int port, char *keytype) {
201 strcpy(buffer, keytype);
203 len = strlen(buffer);
204 len += sprintf(buffer+len, "%d:", port);
205 mungestr(hostname, buffer + strlen(buffer));
208 int verify_host_key(char *hostname, int port, char *keytype, char *key) {
209 char *otherstr, *regname;
216 len = 1 + strlen(key);
219 * Now read a saved key in from the registry and see what it
222 otherstr = smalloc(len);
223 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+15);
224 if (!otherstr || !regname)
225 fatalbox("Out of memory");
227 hostkey_regname(regname, hostname, port, keytype);
229 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
230 &rkey) != ERROR_SUCCESS)
231 return 1; /* key does not exist in registry */
234 ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen);
236 if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA &&
237 !strcmp(keytype, "rsa")) {
239 * Key didn't exist. If the key type is RSA, we'll try
240 * another trick, which is to look up the _old_ key format
241 * under just the hostname and translate that.
243 char *justhost = regname + 1 + strcspn(regname, ":");
244 char *oldstyle = smalloc(len + 10); /* safety margin */
246 ret = RegQueryValueEx(rkey, justhost, NULL, &type,
249 if (ret == ERROR_SUCCESS && type == REG_SZ) {
251 * The old format is two old-style bignums separated by
252 * a slash. An old-style bignum is made of groups of
253 * four hex digits: digits are ordered in sensible
254 * (most to least significant) order within each group,
255 * but groups are ordered in silly (least to most)
256 * order within the bignum. The new format is two
257 * ordinary C-format hex numbers (0xABCDEFG...XYZ, with
258 * A nonzero except in the special case 0x0, which
259 * doesn't appear anyway in RSA keys) separated by a
260 * comma. All hex digits are lowercase in both formats.
266 for (i = 0; i < 2; i++) {
268 *p++ = '0'; *p++ = 'x';
269 ndigits = strcspn(q, "/"); /* find / or end of string */
270 nwords = ndigits / 4;
271 /* now trim ndigits to remove leading zeros */
272 while (q[ (ndigits-1) ^ 3 ] == '0' && ndigits > 1)
274 /* now move digits over to new string */
275 for (j = 0; j < ndigits; j++)
276 p[ndigits-1-j] = q[j^3];
280 q++; /* eat the slash */
281 *p++ = ','; /* add a comma */
283 *p = '\0'; /* terminate the string */
287 * Now _if_ this key matches, we'll enter it in the new
288 * format. If not, we'll assume something odd went
289 * wrong, and hyper-cautiously do nothing.
291 if (!strcmp(otherstr, key))
292 RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr,
299 compare = strcmp(otherstr, key);
304 if (ret == ERROR_MORE_DATA ||
305 (ret == ERROR_SUCCESS && type == REG_SZ && compare))
306 return 2; /* key is different in registry */
307 else if (ret != ERROR_SUCCESS || type != REG_SZ)
308 return 1; /* key does not exist in registry */
310 return 0; /* key matched OK in registry */
313 void store_host_key(char *hostname, int port, char *keytype, char *key) {
317 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+15);
319 fatalbox("Out of memory");
321 hostkey_regname(regname, hostname, port, keytype);
323 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
324 &rkey) != ERROR_SUCCESS)
325 return; /* key does not exist in registry */
326 RegSetValueEx(rkey, regname, 0, REG_SZ, key,
332 * Find the random seed file path and store it in `seedpath'.
334 static void get_seedpath(void) {
338 size = sizeof(seedpath);
340 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey)==ERROR_SUCCESS) {
341 int ret = RegQueryValueEx(rkey, "RandSeedFile",
342 0, &type, seedpath, &size);
343 if (ret != ERROR_SUCCESS || type != REG_SZ)
352 len = GetEnvironmentVariable("HOMEDRIVE", seedpath, sizeof(seedpath));
353 ret = GetEnvironmentVariable("HOMEPATH", seedpath+len,
354 sizeof(seedpath)-len);
355 if (ret == 0) { /* probably win95; store in \WINDOWS */
356 GetWindowsDirectory(seedpath, sizeof(seedpath));
357 len = strlen(seedpath);
360 strcpy(seedpath+len, "\\PUTTY.RND");
364 void read_random_seed(noise_consumer_t consumer) {
370 seedf = CreateFile(seedpath, GENERIC_READ,
371 FILE_SHARE_READ | FILE_SHARE_WRITE,
372 NULL, OPEN_EXISTING, 0, NULL);
374 if (seedf != INVALID_HANDLE_VALUE) {
379 if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len)
388 void write_random_seed(void *data, int len) {
394 seedf = CreateFile(seedpath, GENERIC_WRITE, 0,
395 NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
397 if (seedf != INVALID_HANDLE_VALUE) {
400 WriteFile(seedf, data, len, &lenwritten, NULL);
406 * Recursively delete a registry key and everything under it.
408 static void registry_recursive_remove(HKEY key) {
410 char name[MAX_PATH+1];
414 while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) {
415 if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) {
416 registry_recursive_remove(subkey);
419 RegDeleteKey(key, name);
423 void cleanup_all(void) {
426 char name[MAX_PATH+1];
428 /* ------------------------------------------------------------
429 * Wipe out the random seed file.
435 /* ------------------------------------------------------------
436 * Destroy all registry information associated with PuTTY.
440 * Open the main PuTTY registry key and remove everything in it.
442 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == ERROR_SUCCESS) {
443 registry_recursive_remove(key);
447 * Now open the parent key and remove the PuTTY main key. Once
448 * we've done that, see if the parent key has any other
451 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT,
452 &key) == ERROR_SUCCESS) {
453 RegDeleteKey(key, PUTTY_REG_PARENT_CHILD);
454 ret = RegEnumKey(key, 0, name, sizeof(name));
457 * If the parent key had no other children, we must delete
458 * it in its turn. That means opening the _grandparent_
461 if (ret != ERROR_SUCCESS) {
462 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT,
463 &key) == ERROR_SUCCESS) {
464 RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD);