2 * winstore.c: Windows-specific implementation of the interface
3 * defined in storage.h.
12 static const char *const puttystr = PUTTY_REG_POS "\\Sessions";
14 static char seedpath[2*MAX_PATH+10] = "\0";
16 static char hex[16] = "0123456789ABCDEF";
18 static void mungestr(char *in, char *out) {
22 if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' ||
23 *in == '%' || *in < ' ' || *in > '~' || (*in == '.' && !candot)) {
25 *out++ = hex[((unsigned char)*in) >> 4];
26 *out++ = hex[((unsigned char)*in) & 15];
36 static void unmungestr(char *in, char *out, int outlen) {
38 if (*in == '%' && in[1] && in[2]) {
41 i = in[1] - '0'; i -= (i > 9 ? 7 : 0);
42 j = in[2] - '0'; j -= (j > 9 ? 7 : 0);
45 if (!--outlen) return;
49 if (!--outlen) return;
56 void *open_settings_w(char *sessionname) {
57 HKEY subkey1, sesskey;
61 p = malloc(3*strlen(sessionname)+1);
62 mungestr(sessionname, p);
64 ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1);
65 if (ret != ERROR_SUCCESS) {
69 ret = RegCreateKey(subkey1, p, &sesskey);
72 if (ret != ERROR_SUCCESS)
74 return (void *)sesskey;
77 void write_setting_s(void *handle, char *key, char *value) {
79 RegSetValueEx((HKEY)handle, key, 0, REG_SZ, value, 1+strlen(value));
82 void write_setting_i(void *handle, char *key, int value) {
84 RegSetValueEx((HKEY)handle, key, 0, REG_DWORD,
85 (CONST BYTE *)&value, sizeof(value));
88 void close_settings_w(void *handle) {
89 RegCloseKey((HKEY)handle);
92 void *open_settings_r(char *sessionname) {
93 HKEY subkey1, sesskey;
96 p = malloc(3*strlen(sessionname)+1);
97 mungestr(sessionname, p);
99 if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) {
102 if (RegOpenKey(subkey1, p, &sesskey) != ERROR_SUCCESS) {
105 RegCloseKey(subkey1);
110 return (void *)sesskey;
113 char *read_setting_s(void *handle, char *key, char *buffer, int buflen) {
118 RegQueryValueEx((HKEY)handle, key, 0,
119 &type, buffer, &size) != ERROR_SUCCESS ||
126 int read_setting_i(void *handle, char *key, int defvalue) {
127 DWORD type, val, size;
131 RegQueryValueEx((HKEY)handle, key, 0, &type,
132 (BYTE *)&val, &size) != ERROR_SUCCESS ||
133 size != sizeof(val) || type != REG_DWORD)
139 void close_settings_r(void *handle) {
140 RegCloseKey((HKEY)handle);
143 void del_settings (char *sessionname) {
147 if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS)
150 p = malloc(3*strlen(sessionname)+1);
151 mungestr(sessionname, p);
152 RegDeleteKey(subkey1, p);
155 RegCloseKey(subkey1);
158 struct enumsettings {
163 void *enum_settings_start(void) {
164 struct enumsettings *ret;
167 if (RegCreateKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS)
170 ret = malloc(sizeof(*ret));
179 char *enum_settings_next(void *handle, char *buffer, int buflen) {
180 struct enumsettings *e = (struct enumsettings *)handle;
182 otherbuf = malloc(3*buflen);
183 if (otherbuf && RegEnumKey(e->key, e->i++, otherbuf,
184 3*buflen) == ERROR_SUCCESS) {
185 unmungestr(otherbuf, buffer, buflen);
193 void enum_settings_finish(void *handle) {
194 struct enumsettings *e = (struct enumsettings *)handle;
199 static void hostkey_regname(char *buffer, char *hostname,
200 int port, char *keytype) {
202 strcpy(buffer, keytype);
204 len = strlen(buffer);
205 len += sprintf(buffer+len, "%d:", port);
206 mungestr(hostname, buffer + strlen(buffer));
209 int verify_host_key(char *hostname, int port, char *keytype, char *key) {
210 char *otherstr, *regname;
217 len = 1 + strlen(key);
220 * Now read a saved key in from the registry and see what it
223 otherstr = smalloc(len);
224 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+15);
226 hostkey_regname(regname, hostname, port, keytype);
228 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
229 &rkey) != ERROR_SUCCESS)
230 return 1; /* key does not exist in registry */
233 ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen);
235 if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA &&
236 !strcmp(keytype, "rsa")) {
238 * Key didn't exist. If the key type is RSA, we'll try
239 * another trick, which is to look up the _old_ key format
240 * under just the hostname and translate that.
242 char *justhost = regname + 1 + strcspn(regname, ":");
243 char *oldstyle = smalloc(len + 10); /* safety margin */
245 ret = RegQueryValueEx(rkey, justhost, NULL, &type,
248 if (ret == ERROR_SUCCESS && type == REG_SZ) {
250 * The old format is two old-style bignums separated by
251 * a slash. An old-style bignum is made of groups of
252 * four hex digits: digits are ordered in sensible
253 * (most to least significant) order within each group,
254 * but groups are ordered in silly (least to most)
255 * order within the bignum. The new format is two
256 * ordinary C-format hex numbers (0xABCDEFG...XYZ, with
257 * A nonzero except in the special case 0x0, which
258 * doesn't appear anyway in RSA keys) separated by a
259 * comma. All hex digits are lowercase in both formats.
265 for (i = 0; i < 2; i++) {
267 *p++ = '0'; *p++ = 'x';
268 ndigits = strcspn(q, "/"); /* find / or end of string */
269 nwords = ndigits / 4;
270 /* now trim ndigits to remove leading zeros */
271 while (q[ (ndigits-1) ^ 3 ] == '0' && ndigits > 1)
273 /* now move digits over to new string */
274 for (j = 0; j < ndigits; j++)
275 p[ndigits-1-j] = q[j^3];
279 q++; /* eat the slash */
280 *p++ = ','; /* add a comma */
282 *p = '\0'; /* terminate the string */
286 * Now _if_ this key matches, we'll enter it in the new
287 * format. If not, we'll assume something odd went
288 * wrong, and hyper-cautiously do nothing.
290 if (!strcmp(otherstr, key))
291 RegSetValueEx(rkey, regname, 0, REG_SZ, otherstr,
298 compare = strcmp(otherstr, key);
303 if (ret == ERROR_MORE_DATA ||
304 (ret == ERROR_SUCCESS && type == REG_SZ && compare))
305 return 2; /* key is different in registry */
306 else if (ret != ERROR_SUCCESS || type != REG_SZ)
307 return 1; /* key does not exist in registry */
309 return 0; /* key matched OK in registry */
312 void store_host_key(char *hostname, int port, char *keytype, char *key) {
316 regname = smalloc(3*(strlen(hostname)+strlen(keytype))+15);
318 hostkey_regname(regname, hostname, port, keytype);
320 if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys",
321 &rkey) != ERROR_SUCCESS)
322 return; /* key does not exist in registry */
323 RegSetValueEx(rkey, regname, 0, REG_SZ, key,
329 * Find the random seed file path and store it in `seedpath'.
331 static void get_seedpath(void) {
335 size = sizeof(seedpath);
337 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey)==ERROR_SUCCESS) {
338 int ret = RegQueryValueEx(rkey, "RandSeedFile",
339 0, &type, seedpath, &size);
340 if (ret != ERROR_SUCCESS || type != REG_SZ)
349 len = GetEnvironmentVariable("HOMEDRIVE", seedpath, sizeof(seedpath));
350 ret = GetEnvironmentVariable("HOMEPATH", seedpath+len,
351 sizeof(seedpath)-len);
352 if (ret == 0) { /* probably win95; store in \WINDOWS */
353 GetWindowsDirectory(seedpath, sizeof(seedpath));
354 len = strlen(seedpath);
357 strcpy(seedpath+len, "\\PUTTY.RND");
361 void read_random_seed(noise_consumer_t consumer) {
367 seedf = CreateFile(seedpath, GENERIC_READ,
368 FILE_SHARE_READ | FILE_SHARE_WRITE,
369 NULL, OPEN_EXISTING, 0, NULL);
371 if (seedf != INVALID_HANDLE_VALUE) {
376 if (ReadFile(seedf, buf, sizeof(buf), &len, NULL) && len)
385 void write_random_seed(void *data, int len) {
391 seedf = CreateFile(seedpath, GENERIC_WRITE, 0,
392 NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
394 if (seedf != INVALID_HANDLE_VALUE) {
397 WriteFile(seedf, data, len, &lenwritten, NULL);
403 * Recursively delete a registry key and everything under it.
405 static void registry_recursive_remove(HKEY key) {
407 char name[MAX_PATH+1];
411 while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) {
412 if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) {
413 registry_recursive_remove(subkey);
416 RegDeleteKey(key, name);
420 void cleanup_all(void) {
423 char name[MAX_PATH+1];
425 /* ------------------------------------------------------------
426 * Wipe out the random seed file.
432 /* ------------------------------------------------------------
433 * Destroy all registry information associated with PuTTY.
437 * Open the main PuTTY registry key and remove everything in it.
439 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == ERROR_SUCCESS) {
440 registry_recursive_remove(key);
444 * Now open the parent key and remove the PuTTY main key. Once
445 * we've done that, see if the parent key has any other
448 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_PARENT,
449 &key) == ERROR_SUCCESS) {
450 RegDeleteKey(key, PUTTY_REG_PARENT_CHILD);
451 ret = RegEnumKey(key, 0, name, sizeof(name));
454 * If the parent key had no other children, we must delete
455 * it in its turn. That means opening the _grandparent_
458 if (ret != ERROR_SUCCESS) {
459 if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_GPARENT,
460 &key) == ERROR_SUCCESS) {
461 RegDeleteKey(key, PUTTY_REG_GPARENT_CHILD);