1 /* 2 * Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include "e_os.h" 11 #include "dso_local.h" 12 13 #if defined(DSO_WIN32) 14 15 # ifdef _WIN32_WCE 16 # if _WIN32_WCE < 300 17 static FARPROC GetProcAddressA(HMODULE hModule, LPCSTR lpProcName) 18 { 19 WCHAR lpProcNameW[64]; 20 int i; 21 22 for (i = 0; lpProcName[i] && i < 64; i++) 23 lpProcNameW[i] = (WCHAR)lpProcName[i]; 24 if (i == 64) 25 return NULL; 26 lpProcNameW[i] = 0; 27 28 return GetProcAddressW(hModule, lpProcNameW); 29 } 30 # endif 31 # undef GetProcAddress 32 # define GetProcAddress GetProcAddressA 33 34 static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName) 35 { 36 WCHAR *fnamw; 37 size_t len_0 = strlen(lpLibFileName) + 1, i; 38 39 # ifdef _MSC_VER 40 fnamw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR)); 41 # else 42 fnamw = (WCHAR *)alloca(len_0 * sizeof(WCHAR)); 43 # endif 44 if (fnamw == NULL) { 45 SetLastError(ERROR_NOT_ENOUGH_MEMORY); 46 return NULL; 47 } 48 # if defined(_WIN32_WCE) && _WIN32_WCE>=101 49 if (!MultiByteToWideChar(CP_ACP, 0, lpLibFileName, len_0, fnamw, len_0)) 50 # endif 51 for (i = 0; i < len_0; i++) 52 fnamw[i] = (WCHAR)lpLibFileName[i]; 53 54 return LoadLibraryW(fnamw); 55 } 56 # endif 57 58 /* Part of the hack in "win32_load" ... */ 59 # define DSO_MAX_TRANSLATED_SIZE 256 60 61 static int win32_load(DSO *dso); 62 static int win32_unload(DSO *dso); 63 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname); 64 static char *win32_name_converter(DSO *dso, const char *filename); 65 static char *win32_merger(DSO *dso, const char *filespec1, 66 const char *filespec2); 67 static int win32_pathbyaddr(void *addr, char *path, int sz); 68 static void *win32_globallookup(const char *name); 69 70 static const char *openssl_strnchr(const char *string, int c, size_t len); 71 72 static DSO_METHOD dso_meth_win32 = { 73 "OpenSSL 'win32' shared library method", 74 win32_load, 75 win32_unload, 76 win32_bind_func, 77 NULL, /* ctrl */ 78 win32_name_converter, 79 win32_merger, 80 NULL, /* init */ 81 NULL, /* finish */ 82 win32_pathbyaddr, /* pathbyaddr */ 83 win32_globallookup 84 }; 85 86 DSO_METHOD *DSO_METHOD_openssl(void) 87 { 88 return &dso_meth_win32; 89 } 90 91 /* 92 * For this DSO_METHOD, our meth_data STACK will contain; (i) a pointer to 93 * the handle (HINSTANCE) returned from LoadLibrary(), and copied. 94 */ 95 96 static int win32_load(DSO *dso) 97 { 98 HINSTANCE h = NULL, *p = NULL; 99 /* See applicable comments from dso_dl.c */ 100 char *filename = DSO_convert_filename(dso, NULL); 101 102 if (filename == NULL) { 103 ERR_raise(ERR_LIB_DSO, DSO_R_NO_FILENAME); 104 goto err; 105 } 106 h = LoadLibraryA(filename); 107 if (h == NULL) { 108 ERR_raise_data(ERR_LIB_DSO, DSO_R_LOAD_FAILED, 109 "filename(%s)", filename); 110 goto err; 111 } 112 p = OPENSSL_malloc(sizeof(*p)); 113 if (p == NULL) { 114 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 115 goto err; 116 } 117 *p = h; 118 if (!sk_void_push(dso->meth_data, p)) { 119 ERR_raise(ERR_LIB_DSO, DSO_R_STACK_ERROR); 120 goto err; 121 } 122 /* Success */ 123 dso->loaded_filename = filename; 124 return 1; 125 err: 126 /* Cleanup ! */ 127 OPENSSL_free(filename); 128 OPENSSL_free(p); 129 if (h != NULL) 130 FreeLibrary(h); 131 return 0; 132 } 133 134 static int win32_unload(DSO *dso) 135 { 136 HINSTANCE *p; 137 if (dso == NULL) { 138 ERR_raise(ERR_LIB_DSO, ERR_R_PASSED_NULL_PARAMETER); 139 return 0; 140 } 141 if (sk_void_num(dso->meth_data) < 1) 142 return 1; 143 p = sk_void_pop(dso->meth_data); 144 if (p == NULL) { 145 ERR_raise(ERR_LIB_DSO, DSO_R_NULL_HANDLE); 146 return 0; 147 } 148 if (!FreeLibrary(*p)) { 149 ERR_raise(ERR_LIB_DSO, DSO_R_UNLOAD_FAILED); 150 /* 151 * We should push the value back onto the stack in case of a retry. 152 */ 153 sk_void_push(dso->meth_data, p); 154 return 0; 155 } 156 /* Cleanup */ 157 OPENSSL_free(p); 158 return 1; 159 } 160 161 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname) 162 { 163 HINSTANCE *ptr; 164 union { 165 void *p; 166 FARPROC f; 167 } sym; 168 169 if ((dso == NULL) || (symname == NULL)) { 170 ERR_raise(ERR_LIB_DSO, ERR_R_PASSED_NULL_PARAMETER); 171 return NULL; 172 } 173 if (sk_void_num(dso->meth_data) < 1) { 174 ERR_raise(ERR_LIB_DSO, DSO_R_STACK_ERROR); 175 return NULL; 176 } 177 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1); 178 if (ptr == NULL) { 179 ERR_raise(ERR_LIB_DSO, DSO_R_NULL_HANDLE); 180 return NULL; 181 } 182 sym.f = GetProcAddress(*ptr, symname); 183 if (sym.p == NULL) { 184 ERR_raise_data(ERR_LIB_DSO, DSO_R_SYM_FAILURE, "symname(%s)", symname); 185 return NULL; 186 } 187 return (DSO_FUNC_TYPE)sym.f; 188 } 189 190 struct file_st { 191 const char *node; 192 int nodelen; 193 const char *device; 194 int devicelen; 195 const char *predir; 196 int predirlen; 197 const char *dir; 198 int dirlen; 199 const char *file; 200 int filelen; 201 }; 202 203 static struct file_st *win32_splitter(DSO *dso, const char *filename, 204 int assume_last_is_dir) 205 { 206 struct file_st *result = NULL; 207 enum { IN_NODE, IN_DEVICE, IN_FILE } position; 208 const char *start = filename; 209 char last; 210 211 if (!filename) { 212 ERR_raise(ERR_LIB_DSO, DSO_R_NO_FILENAME); 213 return NULL; 214 } 215 216 result = OPENSSL_zalloc(sizeof(*result)); 217 if (result == NULL) { 218 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 219 return NULL; 220 } 221 222 position = IN_DEVICE; 223 224 if ((filename[0] == '\\' && filename[1] == '\\') 225 || (filename[0] == '/' && filename[1] == '/')) { 226 position = IN_NODE; 227 filename += 2; 228 start = filename; 229 result->node = start; 230 } 231 232 do { 233 last = filename[0]; 234 switch (last) { 235 case ':': 236 if (position != IN_DEVICE) { 237 ERR_raise(ERR_LIB_DSO, DSO_R_INCORRECT_FILE_SYNTAX); 238 OPENSSL_free(result); 239 return NULL; 240 } 241 result->device = start; 242 result->devicelen = (int)(filename - start); 243 position = IN_FILE; 244 start = ++filename; 245 result->dir = start; 246 break; 247 case '\\': 248 case '/': 249 if (position == IN_NODE) { 250 result->nodelen = (int)(filename - start); 251 position = IN_FILE; 252 start = ++filename; 253 result->dir = start; 254 } else if (position == IN_DEVICE) { 255 position = IN_FILE; 256 filename++; 257 result->dir = start; 258 result->dirlen = (int)(filename - start); 259 start = filename; 260 } else { 261 filename++; 262 result->dirlen += (int)(filename - start); 263 start = filename; 264 } 265 break; 266 case '\0': 267 if (position == IN_NODE) { 268 result->nodelen = (int)(filename - start); 269 } else { 270 if (filename - start > 0) { 271 if (assume_last_is_dir) { 272 if (position == IN_DEVICE) { 273 result->dir = start; 274 result->dirlen = 0; 275 } 276 result->dirlen += (int)(filename - start); 277 } else { 278 result->file = start; 279 result->filelen = (int)(filename - start); 280 } 281 } 282 } 283 break; 284 default: 285 filename++; 286 break; 287 } 288 } 289 while (last); 290 291 if (!result->nodelen) 292 result->node = NULL; 293 if (!result->devicelen) 294 result->device = NULL; 295 if (!result->dirlen) 296 result->dir = NULL; 297 if (!result->filelen) 298 result->file = NULL; 299 300 return result; 301 } 302 303 static char *win32_joiner(DSO *dso, const struct file_st *file_split) 304 { 305 int len = 0, offset = 0; 306 char *result = NULL; 307 const char *start; 308 309 if (!file_split) { 310 ERR_raise(ERR_LIB_DSO, ERR_R_PASSED_NULL_PARAMETER); 311 return NULL; 312 } 313 if (file_split->node) { 314 len += 2 + file_split->nodelen; /* 2 for starting \\ */ 315 if (file_split->predir || file_split->dir || file_split->file) 316 len++; /* 1 for ending \ */ 317 } else if (file_split->device) { 318 len += file_split->devicelen + 1; /* 1 for ending : */ 319 } 320 len += file_split->predirlen; 321 if (file_split->predir && (file_split->dir || file_split->file)) { 322 len++; /* 1 for ending \ */ 323 } 324 len += file_split->dirlen; 325 if (file_split->dir && file_split->file) { 326 len++; /* 1 for ending \ */ 327 } 328 len += file_split->filelen; 329 330 if (!len) { 331 ERR_raise(ERR_LIB_DSO, DSO_R_EMPTY_FILE_STRUCTURE); 332 return NULL; 333 } 334 335 result = OPENSSL_malloc(len + 1); 336 if (result == NULL) { 337 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 338 return NULL; 339 } 340 341 if (file_split->node) { 342 strcpy(&result[offset], "\\\\"); 343 offset += 2; 344 strncpy(&result[offset], file_split->node, file_split->nodelen); 345 offset += file_split->nodelen; 346 if (file_split->predir || file_split->dir || file_split->file) { 347 result[offset] = '\\'; 348 offset++; 349 } 350 } else if (file_split->device) { 351 strncpy(&result[offset], file_split->device, file_split->devicelen); 352 offset += file_split->devicelen; 353 result[offset] = ':'; 354 offset++; 355 } 356 start = file_split->predir; 357 while (file_split->predirlen > (start - file_split->predir)) { 358 const char *end = openssl_strnchr(start, '/', 359 file_split->predirlen - (start - 360 file_split->predir)); 361 if (!end) 362 end = start 363 + file_split->predirlen - (start - file_split->predir); 364 strncpy(&result[offset], start, end - start); 365 offset += (int)(end - start); 366 result[offset] = '\\'; 367 offset++; 368 start = end + 1; 369 } 370 start = file_split->dir; 371 while (file_split->dirlen > (start - file_split->dir)) { 372 const char *end = openssl_strnchr(start, '/', 373 file_split->dirlen - (start - 374 file_split->dir)); 375 if (!end) 376 end = start + file_split->dirlen - (start - file_split->dir); 377 strncpy(&result[offset], start, end - start); 378 offset += (int)(end - start); 379 result[offset] = '\\'; 380 offset++; 381 start = end + 1; 382 } 383 strncpy(&result[offset], file_split->file, file_split->filelen); 384 offset += file_split->filelen; 385 result[offset] = '\0'; 386 return result; 387 } 388 389 static char *win32_merger(DSO *dso, const char *filespec1, 390 const char *filespec2) 391 { 392 char *merged = NULL; 393 struct file_st *filespec1_split = NULL; 394 struct file_st *filespec2_split = NULL; 395 396 if (!filespec1 && !filespec2) { 397 ERR_raise(ERR_LIB_DSO, ERR_R_PASSED_NULL_PARAMETER); 398 return NULL; 399 } 400 if (!filespec2) { 401 merged = OPENSSL_strdup(filespec1); 402 if (merged == NULL) { 403 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 404 return NULL; 405 } 406 } else if (!filespec1) { 407 merged = OPENSSL_strdup(filespec2); 408 if (merged == NULL) { 409 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 410 return NULL; 411 } 412 } else { 413 filespec1_split = win32_splitter(dso, filespec1, 0); 414 if (!filespec1_split) { 415 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 416 return NULL; 417 } 418 filespec2_split = win32_splitter(dso, filespec2, 1); 419 if (!filespec2_split) { 420 ERR_raise(ERR_LIB_DSO, ERR_R_MALLOC_FAILURE); 421 OPENSSL_free(filespec1_split); 422 return NULL; 423 } 424 425 /* Fill in into filespec1_split */ 426 if (!filespec1_split->node && !filespec1_split->device) { 427 filespec1_split->node = filespec2_split->node; 428 filespec1_split->nodelen = filespec2_split->nodelen; 429 filespec1_split->device = filespec2_split->device; 430 filespec1_split->devicelen = filespec2_split->devicelen; 431 } 432 if (!filespec1_split->dir) { 433 filespec1_split->dir = filespec2_split->dir; 434 filespec1_split->dirlen = filespec2_split->dirlen; 435 } else if (filespec1_split->dir[0] != '\\' 436 && filespec1_split->dir[0] != '/') { 437 filespec1_split->predir = filespec2_split->dir; 438 filespec1_split->predirlen = filespec2_split->dirlen; 439 } 440 if (!filespec1_split->file) { 441 filespec1_split->file = filespec2_split->file; 442 filespec1_split->filelen = filespec2_split->filelen; 443 } 444 445 merged = win32_joiner(dso, filespec1_split); 446 } 447 OPENSSL_free(filespec1_split); 448 OPENSSL_free(filespec2_split); 449 return merged; 450 } 451 452 static char *win32_name_converter(DSO *dso, const char *filename) 453 { 454 char *translated; 455 int len, transform; 456 457 transform = ((strstr(filename, "/") == NULL) && 458 (strstr(filename, "\\") == NULL) && 459 (strstr(filename, ":") == NULL)); 460 /* If transform != 0, then we convert to %s.dll, else just dupe filename */ 461 462 len = strlen(filename) + 1; 463 if (transform) 464 len += strlen(".dll"); 465 translated = OPENSSL_malloc(len); 466 if (translated == NULL) { 467 ERR_raise(ERR_LIB_DSO, DSO_R_NAME_TRANSLATION_FAILED); 468 return NULL; 469 } 470 BIO_snprintf(translated, len, "%s%s", filename, transform ? ".dll" : ""); 471 return translated; 472 } 473 474 static const char *openssl_strnchr(const char *string, int c, size_t len) 475 { 476 size_t i; 477 const char *p; 478 for (i = 0, p = string; i < len && *p; i++, p++) { 479 if (*p == c) 480 return p; 481 } 482 return NULL; 483 } 484 485 # include <tlhelp32.h> 486 # ifdef _WIN32_WCE 487 # define DLLNAME "TOOLHELP.DLL" 488 # else 489 # ifdef MODULEENTRY32 490 # undef MODULEENTRY32 /* unmask the ASCII version! */ 491 # endif 492 # define DLLNAME "KERNEL32.DLL" 493 # endif 494 495 typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD); 496 typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE); 497 typedef BOOL(WINAPI *MODULE32) (HANDLE, MODULEENTRY32 *); 498 499 static int win32_pathbyaddr(void *addr, char *path, int sz) 500 { 501 HMODULE dll; 502 HANDLE hModuleSnap = INVALID_HANDLE_VALUE; 503 MODULEENTRY32 me32; 504 CREATETOOLHELP32SNAPSHOT create_snap; 505 CLOSETOOLHELP32SNAPSHOT close_snap; 506 MODULE32 module_first, module_next; 507 508 if (addr == NULL) { 509 union { 510 int (*f) (void *, char *, int); 511 void *p; 512 } t = { 513 win32_pathbyaddr 514 }; 515 addr = t.p; 516 } 517 518 dll = LoadLibrary(TEXT(DLLNAME)); 519 if (dll == NULL) { 520 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 521 return -1; 522 } 523 524 create_snap = (CREATETOOLHELP32SNAPSHOT) 525 GetProcAddress(dll, "CreateToolhelp32Snapshot"); 526 if (create_snap == NULL) { 527 FreeLibrary(dll); 528 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 529 return -1; 530 } 531 /* We take the rest for granted... */ 532 # ifdef _WIN32_WCE 533 close_snap = (CLOSETOOLHELP32SNAPSHOT) 534 GetProcAddress(dll, "CloseToolhelp32Snapshot"); 535 # else 536 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle; 537 # endif 538 module_first = (MODULE32) GetProcAddress(dll, "Module32First"); 539 module_next = (MODULE32) GetProcAddress(dll, "Module32Next"); 540 541 /* 542 * Take a snapshot of current process which includes 543 * list of all involved modules. 544 */ 545 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0); 546 if (hModuleSnap == INVALID_HANDLE_VALUE) { 547 FreeLibrary(dll); 548 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 549 return -1; 550 } 551 552 me32.dwSize = sizeof(me32); 553 554 if (!(*module_first) (hModuleSnap, &me32)) { 555 (*close_snap) (hModuleSnap); 556 FreeLibrary(dll); 557 ERR_raise(ERR_LIB_DSO, DSO_R_FAILURE); 558 return -1; 559 } 560 561 /* Enumerate the modules to find one which includes me. */ 562 do { 563 if ((size_t) addr >= (size_t) me32.modBaseAddr && 564 (size_t) addr < (size_t) (me32.modBaseAddr + me32.modBaseSize)) { 565 (*close_snap) (hModuleSnap); 566 FreeLibrary(dll); 567 # ifdef _WIN32_WCE 568 # if _WIN32_WCE >= 101 569 return WideCharToMultiByte(CP_ACP, 0, me32.szExePath, -1, 570 path, sz, NULL, NULL); 571 # else 572 { 573 int i, len = (int)wcslen(me32.szExePath); 574 if (sz <= 0) 575 return len + 1; 576 if (len >= sz) 577 len = sz - 1; 578 for (i = 0; i < len; i++) 579 path[i] = (char)me32.szExePath[i]; 580 path[len++] = '\0'; 581 return len; 582 } 583 # endif 584 # else 585 { 586 int len = (int)strlen(me32.szExePath); 587 if (sz <= 0) 588 return len + 1; 589 if (len >= sz) 590 len = sz - 1; 591 memcpy(path, me32.szExePath, len); 592 path[len++] = '\0'; 593 return len; 594 } 595 # endif 596 } 597 } while ((*module_next) (hModuleSnap, &me32)); 598 599 (*close_snap) (hModuleSnap); 600 FreeLibrary(dll); 601 return 0; 602 } 603 604 static void *win32_globallookup(const char *name) 605 { 606 HMODULE dll; 607 HANDLE hModuleSnap = INVALID_HANDLE_VALUE; 608 MODULEENTRY32 me32; 609 CREATETOOLHELP32SNAPSHOT create_snap; 610 CLOSETOOLHELP32SNAPSHOT close_snap; 611 MODULE32 module_first, module_next; 612 union { 613 void *p; 614 FARPROC f; 615 } ret = { NULL }; 616 617 dll = LoadLibrary(TEXT(DLLNAME)); 618 if (dll == NULL) { 619 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 620 return NULL; 621 } 622 623 create_snap = (CREATETOOLHELP32SNAPSHOT) 624 GetProcAddress(dll, "CreateToolhelp32Snapshot"); 625 if (create_snap == NULL) { 626 FreeLibrary(dll); 627 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 628 return NULL; 629 } 630 /* We take the rest for granted... */ 631 # ifdef _WIN32_WCE 632 close_snap = (CLOSETOOLHELP32SNAPSHOT) 633 GetProcAddress(dll, "CloseToolhelp32Snapshot"); 634 # else 635 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle; 636 # endif 637 module_first = (MODULE32) GetProcAddress(dll, "Module32First"); 638 module_next = (MODULE32) GetProcAddress(dll, "Module32Next"); 639 640 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0); 641 if (hModuleSnap == INVALID_HANDLE_VALUE) { 642 FreeLibrary(dll); 643 ERR_raise(ERR_LIB_DSO, DSO_R_UNSUPPORTED); 644 return NULL; 645 } 646 647 me32.dwSize = sizeof(me32); 648 649 if (!(*module_first) (hModuleSnap, &me32)) { 650 (*close_snap) (hModuleSnap); 651 FreeLibrary(dll); 652 return NULL; 653 } 654 655 do { 656 if ((ret.f = GetProcAddress(me32.hModule, name))) { 657 (*close_snap) (hModuleSnap); 658 FreeLibrary(dll); 659 return ret.p; 660 } 661 } while ((*module_next) (hModuleSnap, &me32)); 662 663 (*close_snap) (hModuleSnap); 664 FreeLibrary(dll); 665 return NULL; 666 } 667 #endif /* DSO_WIN32 */ 668