| 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> |
| 8 | #include <stdlib.h> |
| 9 | #include "putty.h" |
| 10 | #include "storage.h" |
| 11 | |
| 12 | static const char *const puttystr = PUTTY_REG_POS "\\Sessions"; |
| 13 | |
| 14 | static char seedpath[2 * MAX_PATH + 10] = "\0"; |
| 15 | |
| 16 | static const char hex[16] = "0123456789ABCDEF"; |
| 17 | |
| 18 | static void mungestr(const char *in, char *out) |
| 19 | { |
| 20 | int candot = 0; |
| 21 | |
| 22 | while (*in) { |
| 23 | if (*in == ' ' || *in == '\\' || *in == '*' || *in == '?' || |
| 24 | *in == '%' || *in < ' ' || *in > '~' || (*in == '.' |
| 25 | && !candot)) { |
| 26 | *out++ = '%'; |
| 27 | *out++ = hex[((unsigned char) *in) >> 4]; |
| 28 | *out++ = hex[((unsigned char) *in) & 15]; |
| 29 | } else |
| 30 | *out++ = *in; |
| 31 | in++; |
| 32 | candot = 1; |
| 33 | } |
| 34 | *out = '\0'; |
| 35 | return; |
| 36 | } |
| 37 | |
| 38 | static void unmungestr(const char *in, char *out, int outlen) |
| 39 | { |
| 40 | while (*in) { |
| 41 | if (*in == '%' && in[1] && in[2]) { |
| 42 | int i, j; |
| 43 | |
| 44 | i = in[1] - '0'; |
| 45 | i -= (i > 9 ? 7 : 0); |
| 46 | j = in[2] - '0'; |
| 47 | j -= (j > 9 ? 7 : 0); |
| 48 | |
| 49 | *out++ = (i << 4) + j; |
| 50 | if (!--outlen) |
| 51 | return; |
| 52 | in += 3; |
| 53 | } else { |
| 54 | *out++ = *in++; |
| 55 | if (!--outlen) |
| 56 | return; |
| 57 | } |
| 58 | } |
| 59 | *out = '\0'; |
| 60 | return; |
| 61 | } |
| 62 | |
| 63 | void *open_settings_w(const char *sessionname) |
| 64 | { |
| 65 | HKEY subkey1, sesskey; |
| 66 | int ret; |
| 67 | char *p; |
| 68 | |
| 69 | p = smalloc(3 * strlen(sessionname) + 1); |
| 70 | mungestr(sessionname, p); |
| 71 | |
| 72 | ret = RegCreateKey(HKEY_CURRENT_USER, puttystr, &subkey1); |
| 73 | if (ret != ERROR_SUCCESS) { |
| 74 | sfree(p); |
| 75 | return NULL; |
| 76 | } |
| 77 | ret = RegCreateKey(subkey1, p, &sesskey); |
| 78 | sfree(p); |
| 79 | RegCloseKey(subkey1); |
| 80 | if (ret != ERROR_SUCCESS) |
| 81 | return NULL; |
| 82 | return (void *) sesskey; |
| 83 | } |
| 84 | |
| 85 | void write_setting_s(void *handle, const char *key, const char *value) |
| 86 | { |
| 87 | if (handle) |
| 88 | RegSetValueEx((HKEY) handle, key, 0, REG_SZ, value, |
| 89 | 1 + strlen(value)); |
| 90 | } |
| 91 | |
| 92 | void write_setting_i(void *handle, const char *key, int value) |
| 93 | { |
| 94 | if (handle) |
| 95 | RegSetValueEx((HKEY) handle, key, 0, REG_DWORD, |
| 96 | (CONST BYTE *) & value, sizeof(value)); |
| 97 | } |
| 98 | |
| 99 | void close_settings_w(void *handle) |
| 100 | { |
| 101 | RegCloseKey((HKEY) handle); |
| 102 | } |
| 103 | |
| 104 | void *open_settings_r(const char *sessionname) |
| 105 | { |
| 106 | HKEY subkey1, sesskey; |
| 107 | char *p; |
| 108 | |
| 109 | p = smalloc(3 * strlen(sessionname) + 1); |
| 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 | |
| 121 | sfree(p); |
| 122 | |
| 123 | return (void *) sesskey; |
| 124 | } |
| 125 | |
| 126 | char *read_setting_s(void *handle, const char *key, char *buffer, int buflen) |
| 127 | { |
| 128 | DWORD type, size; |
| 129 | size = buflen; |
| 130 | |
| 131 | if (!handle || |
| 132 | RegQueryValueEx((HKEY) handle, key, 0, |
| 133 | &type, buffer, &size) != ERROR_SUCCESS || |
| 134 | type != REG_SZ) return NULL; |
| 135 | else |
| 136 | return buffer; |
| 137 | } |
| 138 | |
| 139 | int read_setting_i(void *handle, const char *key, int defvalue) |
| 140 | { |
| 141 | DWORD type, val, size; |
| 142 | size = sizeof(val); |
| 143 | |
| 144 | if (!handle || |
| 145 | RegQueryValueEx((HKEY) handle, key, 0, &type, |
| 146 | (BYTE *) & val, &size) != ERROR_SUCCESS || |
| 147 | size != sizeof(val) || type != REG_DWORD) |
| 148 | return defvalue; |
| 149 | else |
| 150 | return val; |
| 151 | } |
| 152 | |
| 153 | void close_settings_r(void *handle) |
| 154 | { |
| 155 | RegCloseKey((HKEY) handle); |
| 156 | } |
| 157 | |
| 158 | void del_settings(const char *sessionname) |
| 159 | { |
| 160 | HKEY subkey1; |
| 161 | char *p; |
| 162 | |
| 163 | if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &subkey1) != ERROR_SUCCESS) |
| 164 | return; |
| 165 | |
| 166 | p = smalloc(3 * strlen(sessionname) + 1); |
| 167 | mungestr(sessionname, p); |
| 168 | RegDeleteKey(subkey1, p); |
| 169 | sfree(p); |
| 170 | |
| 171 | RegCloseKey(subkey1); |
| 172 | } |
| 173 | |
| 174 | struct enumsettings { |
| 175 | HKEY key; |
| 176 | int i; |
| 177 | }; |
| 178 | |
| 179 | void *enum_settings_start(void) |
| 180 | { |
| 181 | struct enumsettings *ret; |
| 182 | HKEY key; |
| 183 | |
| 184 | if (RegOpenKey(HKEY_CURRENT_USER, puttystr, &key) != ERROR_SUCCESS) |
| 185 | return NULL; |
| 186 | |
| 187 | ret = smalloc(sizeof(*ret)); |
| 188 | if (ret) { |
| 189 | ret->key = key; |
| 190 | ret->i = 0; |
| 191 | } |
| 192 | |
| 193 | return ret; |
| 194 | } |
| 195 | |
| 196 | char *enum_settings_next(void *handle, char *buffer, int buflen) |
| 197 | { |
| 198 | struct enumsettings *e = (struct enumsettings *) handle; |
| 199 | char *otherbuf; |
| 200 | otherbuf = smalloc(3 * buflen); |
| 201 | if (RegEnumKey(e->key, e->i++, otherbuf, 3 * buflen) == ERROR_SUCCESS) { |
| 202 | unmungestr(otherbuf, buffer, buflen); |
| 203 | sfree(otherbuf); |
| 204 | return buffer; |
| 205 | } else { |
| 206 | sfree(otherbuf); |
| 207 | return NULL; |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | void enum_settings_finish(void *handle) |
| 212 | { |
| 213 | struct enumsettings *e = (struct enumsettings *) handle; |
| 214 | RegCloseKey(e->key); |
| 215 | sfree(e); |
| 216 | } |
| 217 | |
| 218 | static void hostkey_regname(char *buffer, const char *hostname, |
| 219 | int port, const char *keytype) |
| 220 | { |
| 221 | int len; |
| 222 | strcpy(buffer, keytype); |
| 223 | strcat(buffer, "@"); |
| 224 | len = strlen(buffer); |
| 225 | len += sprintf(buffer + len, "%d:", port); |
| 226 | mungestr(hostname, buffer + strlen(buffer)); |
| 227 | } |
| 228 | |
| 229 | int verify_host_key(const char *hostname, int port, |
| 230 | const char *keytype, const char *key) |
| 231 | { |
| 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); |
| 246 | regname = smalloc(3 * (strlen(hostname) + strlen(keytype)) + 15); |
| 247 | |
| 248 | hostkey_regname(regname, hostname, port, keytype); |
| 249 | |
| 250 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", |
| 251 | &rkey) != ERROR_SUCCESS) |
| 252 | return 1; /* key does not exist in registry */ |
| 253 | |
| 254 | readlen = len; |
| 255 | ret = RegQueryValueEx(rkey, regname, NULL, &type, otherstr, &readlen); |
| 256 | |
| 257 | if (ret != ERROR_SUCCESS && ret != ERROR_MORE_DATA && |
| 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 | } |
| 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 || |
| 327 | (ret == ERROR_SUCCESS && type == REG_SZ && compare)) |
| 328 | return 2; /* key is different in registry */ |
| 329 | else if (ret != ERROR_SUCCESS || type != REG_SZ) |
| 330 | return 1; /* key does not exist in registry */ |
| 331 | else |
| 332 | return 0; /* key matched OK in registry */ |
| 333 | } |
| 334 | |
| 335 | void store_host_key(const char *hostname, int port, |
| 336 | const char *keytype, const char *key) |
| 337 | { |
| 338 | char *regname; |
| 339 | HKEY rkey; |
| 340 | |
| 341 | regname = smalloc(3 * (strlen(hostname) + strlen(keytype)) + 15); |
| 342 | |
| 343 | hostkey_regname(regname, hostname, port, keytype); |
| 344 | |
| 345 | if (RegCreateKey(HKEY_CURRENT_USER, PUTTY_REG_POS "\\SshHostKeys", |
| 346 | &rkey) != ERROR_SUCCESS) |
| 347 | return; /* key does not exist in registry */ |
| 348 | RegSetValueEx(rkey, regname, 0, REG_SZ, key, strlen(key) + 1); |
| 349 | RegCloseKey(rkey); |
| 350 | } |
| 351 | |
| 352 | /* |
| 353 | * Find the random seed file path and store it in `seedpath'. |
| 354 | */ |
| 355 | static void get_seedpath(void) |
| 356 | { |
| 357 | HKEY rkey; |
| 358 | DWORD type, size; |
| 359 | |
| 360 | size = sizeof(seedpath); |
| 361 | |
| 362 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &rkey) == |
| 363 | ERROR_SUCCESS) { |
| 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 | |
| 375 | len = |
| 376 | GetEnvironmentVariable("HOMEDRIVE", seedpath, |
| 377 | sizeof(seedpath)); |
| 378 | ret = |
| 379 | GetEnvironmentVariable("HOMEPATH", seedpath + len, |
| 380 | sizeof(seedpath) - len); |
| 381 | if (ret == 0) { /* probably win95; store in \WINDOWS */ |
| 382 | GetWindowsDirectory(seedpath, sizeof(seedpath)); |
| 383 | len = strlen(seedpath); |
| 384 | } else |
| 385 | len += ret; |
| 386 | strcpy(seedpath + len, "\\PUTTY.RND"); |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | void read_random_seed(noise_consumer_t consumer) |
| 391 | { |
| 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) |
| 407 | consumer(buf, len); |
| 408 | else |
| 409 | break; |
| 410 | } |
| 411 | CloseHandle(seedf); |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | void write_random_seed(void *data, int len) |
| 416 | { |
| 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 | */ |
| 436 | static void registry_recursive_remove(HKEY key) |
| 437 | { |
| 438 | DWORD i; |
| 439 | char name[MAX_PATH + 1]; |
| 440 | HKEY subkey; |
| 441 | |
| 442 | i = 0; |
| 443 | while (RegEnumKey(key, i, name, sizeof(name)) == ERROR_SUCCESS) { |
| 444 | if (RegOpenKey(key, name, &subkey) == ERROR_SUCCESS) { |
| 445 | registry_recursive_remove(subkey); |
| 446 | RegCloseKey(subkey); |
| 447 | } |
| 448 | RegDeleteKey(key, name); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | void cleanup_all(void) |
| 453 | { |
| 454 | HKEY key; |
| 455 | int ret; |
| 456 | char name[MAX_PATH + 1]; |
| 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 | */ |
| 472 | if (RegOpenKey(HKEY_CURRENT_USER, PUTTY_REG_POS, &key) == |
| 473 | ERROR_SUCCESS) { |
| 474 | registry_recursive_remove(key); |
| 475 | RegCloseKey(key); |
| 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, |
| 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 | } |
| 499 | } |
| 500 | /* |
| 501 | * Now we're done. |
| 502 | */ |
| 503 | } |