2 * Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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
11 #include "dso_local.h"
13 #if defined(DSO_WIN32)
17 static FARPROC GetProcAddressA(HMODULE hModule, LPCSTR lpProcName)
19 WCHAR lpProcNameW[64];
22 for (i = 0; lpProcName[i] && i < 64; i++)
23 lpProcNameW[i] = (WCHAR)lpProcName[i];
28 return GetProcAddressW(hModule, lpProcNameW);
31 # undef GetProcAddress
32 # define GetProcAddress GetProcAddressA
34 static HINSTANCE LoadLibraryA(LPCSTR lpLibFileName)
37 size_t len_0 = strlen(lpLibFileName) + 1, i;
40 fnamw = (WCHAR *)_alloca(len_0 * sizeof(WCHAR));
42 fnamw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
45 SetLastError(ERROR_NOT_ENOUGH_MEMORY);
48 # if defined(_WIN32_WCE) && _WIN32_WCE>=101
49 if (!MultiByteToWideChar(CP_ACP, 0, lpLibFileName, len_0, fnamw, len_0))
51 for (i = 0; i < len_0; i++)
52 fnamw[i] = (WCHAR)lpLibFileName[i];
54 return LoadLibraryW(fnamw);
58 /* Part of the hack in "win32_load" ... */
59 # define DSO_MAX_TRANSLATED_SIZE 256
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);
70 static const char *openssl_strnchr(const char *string, int c, size_t len);
74 static DSO_METHOD dso_meth_win32 = {
75 "OpenSSL 'win32' shared library method",
84 win32_pathbyaddr, /* pathbyaddr */
88 DSO_METHOD *DSO_METHOD_openssl(void)
90 return &dso_meth_win32;
94 * For this DSO_METHOD, our meth_data STACK will contain; (i) a pointer to
95 * the handle (HINSTANCE) returned from LoadLibrary(), and copied.
98 static int win32_load(DSO *dso)
100 HINSTANCE h = NULL, *p = NULL;
101 /* See applicable comments from dso_dl.c */
102 char *filename = DSO_convert_filename(dso, NULL);
104 if (filename == NULL) {
105 DSOerr(DSO_F_WIN32_LOAD, DSO_R_NO_FILENAME);
108 h = LoadLibraryA(filename);
110 DSOerr(DSO_F_WIN32_LOAD, DSO_R_LOAD_FAILED);
111 ERR_add_error_data(3, "filename(", filename, ")");
114 p = OPENSSL_malloc(sizeof(*p));
116 DSOerr(DSO_F_WIN32_LOAD, ERR_R_MALLOC_FAILURE);
120 if (!sk_void_push(dso->meth_data, p)) {
121 DSOerr(DSO_F_WIN32_LOAD, DSO_R_STACK_ERROR);
125 dso->loaded_filename = filename;
129 OPENSSL_free(filename);
136 static int win32_unload(DSO *dso)
140 DSOerr(DSO_F_WIN32_UNLOAD, ERR_R_PASSED_NULL_PARAMETER);
143 if (sk_void_num(dso->meth_data) < 1)
145 p = sk_void_pop(dso->meth_data);
147 DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_NULL_HANDLE);
150 if (!FreeLibrary(*p)) {
151 DSOerr(DSO_F_WIN32_UNLOAD, DSO_R_UNLOAD_FAILED);
153 * We should push the value back onto the stack in case of a retry.
155 sk_void_push(dso->meth_data, p);
163 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
171 if ((dso == NULL) || (symname == NULL)) {
172 DSOerr(DSO_F_WIN32_BIND_FUNC, ERR_R_PASSED_NULL_PARAMETER);
175 if (sk_void_num(dso->meth_data) < 1) {
176 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_STACK_ERROR);
179 ptr = sk_void_value(dso->meth_data, sk_void_num(dso->meth_data) - 1);
181 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_NULL_HANDLE);
184 sym.f = GetProcAddress(*ptr, symname);
186 DSOerr(DSO_F_WIN32_BIND_FUNC, DSO_R_SYM_FAILURE);
187 ERR_add_error_data(3, "symname(", symname, ")");
190 return (DSO_FUNC_TYPE)sym.f;
206 static struct file_st *win32_splitter(DSO *dso, const char *filename,
207 int assume_last_is_dir)
209 struct file_st *result = NULL;
210 enum { IN_NODE, IN_DEVICE, IN_FILE } position;
211 const char *start = filename;
215 DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_NO_FILENAME);
219 result = OPENSSL_zalloc(sizeof(*result));
220 if (result == NULL) {
221 DSOerr(DSO_F_WIN32_SPLITTER, ERR_R_MALLOC_FAILURE);
225 position = IN_DEVICE;
227 if ((filename[0] == '\\' && filename[1] == '\\')
228 || (filename[0] == '/' && filename[1] == '/')) {
232 result->node = start;
239 if (position != IN_DEVICE) {
240 DSOerr(DSO_F_WIN32_SPLITTER, DSO_R_INCORRECT_FILE_SYNTAX);
241 OPENSSL_free(result);
244 result->device = start;
245 result->devicelen = (int)(filename - start);
252 if (position == IN_NODE) {
253 result->nodelen = (int)(filename - start);
257 } else if (position == IN_DEVICE) {
261 result->dirlen = (int)(filename - start);
265 result->dirlen += (int)(filename - start);
270 if (position == IN_NODE) {
271 result->nodelen = (int)(filename - start);
273 if (filename - start > 0) {
274 if (assume_last_is_dir) {
275 if (position == IN_DEVICE) {
279 result->dirlen += (int)(filename - start);
281 result->file = start;
282 result->filelen = (int)(filename - start);
294 if (!result->nodelen)
296 if (!result->devicelen)
297 result->device = NULL;
300 if (!result->filelen)
306 static char *win32_joiner(DSO *dso, const struct file_st *file_split)
308 int len = 0, offset = 0;
313 DSOerr(DSO_F_WIN32_JOINER, ERR_R_PASSED_NULL_PARAMETER);
316 if (file_split->node) {
317 len += 2 + file_split->nodelen; /* 2 for starting \\ */
318 if (file_split->predir || file_split->dir || file_split->file)
319 len++; /* 1 for ending \ */
320 } else if (file_split->device) {
321 len += file_split->devicelen + 1; /* 1 for ending : */
323 len += file_split->predirlen;
324 if (file_split->predir && (file_split->dir || file_split->file)) {
325 len++; /* 1 for ending \ */
327 len += file_split->dirlen;
328 if (file_split->dir && file_split->file) {
329 len++; /* 1 for ending \ */
331 len += file_split->filelen;
334 DSOerr(DSO_F_WIN32_JOINER, DSO_R_EMPTY_FILE_STRUCTURE);
338 result = OPENSSL_malloc(len + 1);
339 if (result == NULL) {
340 DSOerr(DSO_F_WIN32_JOINER, ERR_R_MALLOC_FAILURE);
344 if (file_split->node) {
345 strcpy(&result[offset], "\\\\");
347 strncpy(&result[offset], file_split->node, file_split->nodelen);
348 offset += file_split->nodelen;
349 if (file_split->predir || file_split->dir || file_split->file) {
350 result[offset] = '\\';
353 } else if (file_split->device) {
354 strncpy(&result[offset], file_split->device, file_split->devicelen);
355 offset += file_split->devicelen;
356 result[offset] = ':';
359 start = file_split->predir;
360 while (file_split->predirlen > (start - file_split->predir)) {
361 const char *end = openssl_strnchr(start, '/',
362 file_split->predirlen - (start -
363 file_split->predir));
366 + file_split->predirlen - (start - file_split->predir);
367 strncpy(&result[offset], start, end - start);
368 offset += (int)(end - start);
369 result[offset] = '\\';
373 start = file_split->dir;
374 while (file_split->dirlen > (start - file_split->dir)) {
375 const char *end = openssl_strnchr(start, '/',
376 file_split->dirlen - (start -
379 end = start + file_split->dirlen - (start - file_split->dir);
380 strncpy(&result[offset], start, end - start);
381 offset += (int)(end - start);
382 result[offset] = '\\';
386 strncpy(&result[offset], file_split->file, file_split->filelen);
387 offset += file_split->filelen;
388 result[offset] = '\0';
392 static char *win32_merger(DSO *dso, const char *filespec1,
393 const char *filespec2)
396 struct file_st *filespec1_split = NULL;
397 struct file_st *filespec2_split = NULL;
399 if (!filespec1 && !filespec2) {
400 DSOerr(DSO_F_WIN32_MERGER, ERR_R_PASSED_NULL_PARAMETER);
404 merged = OPENSSL_strdup(filespec1);
405 if (merged == NULL) {
406 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
409 } else if (!filespec1) {
410 merged = OPENSSL_strdup(filespec2);
411 if (merged == NULL) {
412 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
416 filespec1_split = win32_splitter(dso, filespec1, 0);
417 if (!filespec1_split) {
418 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
421 filespec2_split = win32_splitter(dso, filespec2, 1);
422 if (!filespec2_split) {
423 DSOerr(DSO_F_WIN32_MERGER, ERR_R_MALLOC_FAILURE);
424 OPENSSL_free(filespec1_split);
428 /* Fill in into filespec1_split */
429 if (!filespec1_split->node && !filespec1_split->device) {
430 filespec1_split->node = filespec2_split->node;
431 filespec1_split->nodelen = filespec2_split->nodelen;
432 filespec1_split->device = filespec2_split->device;
433 filespec1_split->devicelen = filespec2_split->devicelen;
435 if (!filespec1_split->dir) {
436 filespec1_split->dir = filespec2_split->dir;
437 filespec1_split->dirlen = filespec2_split->dirlen;
438 } else if (filespec1_split->dir[0] != '\\'
439 && filespec1_split->dir[0] != '/') {
440 filespec1_split->predir = filespec2_split->dir;
441 filespec1_split->predirlen = filespec2_split->dirlen;
443 if (!filespec1_split->file) {
444 filespec1_split->file = filespec2_split->file;
445 filespec1_split->filelen = filespec2_split->filelen;
448 merged = win32_joiner(dso, filespec1_split);
450 OPENSSL_free(filespec1_split);
451 OPENSSL_free(filespec2_split);
455 static char *win32_name_converter(DSO *dso, const char *filename)
460 len = strlen(filename);
461 transform = ((strstr(filename, "/") == NULL) &&
462 (strstr(filename, "\\") == NULL) &&
463 (strstr(filename, ":") == NULL));
465 /* We will convert this to "%s.dll" */
466 translated = OPENSSL_malloc(len + 5);
468 /* We will simply duplicate filename */
469 translated = OPENSSL_malloc(len + 1);
470 if (translated == NULL) {
471 DSOerr(DSO_F_WIN32_NAME_CONVERTER, DSO_R_NAME_TRANSLATION_FAILED);
475 sprintf(translated, "%s.dll", filename);
477 sprintf(translated, "%s", filename);
481 static const char *openssl_strnchr(const char *string, int c, size_t len)
485 for (i = 0, p = string; i < len && *p; i++, p++) {
492 # include <tlhelp32.h>
494 # define DLLNAME "TOOLHELP.DLL"
496 # ifdef MODULEENTRY32
497 # undef MODULEENTRY32 /* unmask the ASCII version! */
499 # define DLLNAME "KERNEL32.DLL"
502 typedef HANDLE(WINAPI *CREATETOOLHELP32SNAPSHOT) (DWORD, DWORD);
503 typedef BOOL(WINAPI *CLOSETOOLHELP32SNAPSHOT) (HANDLE);
504 typedef BOOL(WINAPI *MODULE32) (HANDLE, MODULEENTRY32 *);
506 static int win32_pathbyaddr(void *addr, char *path, int sz)
509 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
511 CREATETOOLHELP32SNAPSHOT create_snap;
512 CLOSETOOLHELP32SNAPSHOT close_snap;
513 MODULE32 module_first, module_next;
517 int (*f) (void *, char *, int);
525 dll = LoadLibrary(TEXT(DLLNAME));
527 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
531 create_snap = (CREATETOOLHELP32SNAPSHOT)
532 GetProcAddress(dll, "CreateToolhelp32Snapshot");
533 if (create_snap == NULL) {
535 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
538 /* We take the rest for granted... */
540 close_snap = (CLOSETOOLHELP32SNAPSHOT)
541 GetProcAddress(dll, "CloseToolhelp32Snapshot");
543 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
545 module_first = (MODULE32) GetProcAddress(dll, "Module32First");
546 module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
549 * Take a snapshot of current process which includes
550 * list of all involved modules.
552 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
553 if (hModuleSnap == INVALID_HANDLE_VALUE) {
555 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_UNSUPPORTED);
559 me32.dwSize = sizeof(me32);
561 if (!(*module_first) (hModuleSnap, &me32)) {
562 (*close_snap) (hModuleSnap);
564 DSOerr(DSO_F_WIN32_PATHBYADDR, DSO_R_FAILURE);
568 /* Enumerate the modules to find one which includes me. */
570 if ((uintptr_t) addr >= (uintptr_t) me32.modBaseAddr &&
571 (uintptr_t) addr < (uintptr_t) (me32.modBaseAddr + me32.modBaseSize)) {
572 (*close_snap) (hModuleSnap);
575 # if _WIN32_WCE >= 101
576 return WideCharToMultiByte(CP_ACP, 0, me32.szExePath, -1,
577 path, sz, NULL, NULL);
580 int i, len = (int)wcslen(me32.szExePath);
585 for (i = 0; i < len; i++)
586 path[i] = (char)me32.szExePath[i];
593 int len = (int)strlen(me32.szExePath);
598 memcpy(path, me32.szExePath, len);
604 } while ((*module_next) (hModuleSnap, &me32));
606 (*close_snap) (hModuleSnap);
611 static void *win32_globallookup(const char *name)
614 HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
616 CREATETOOLHELP32SNAPSHOT create_snap;
617 CLOSETOOLHELP32SNAPSHOT close_snap;
618 MODULE32 module_first, module_next;
624 dll = LoadLibrary(TEXT(DLLNAME));
626 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
630 create_snap = (CREATETOOLHELP32SNAPSHOT)
631 GetProcAddress(dll, "CreateToolhelp32Snapshot");
632 if (create_snap == NULL) {
634 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
637 /* We take the rest for granted... */
639 close_snap = (CLOSETOOLHELP32SNAPSHOT)
640 GetProcAddress(dll, "CloseToolhelp32Snapshot");
642 close_snap = (CLOSETOOLHELP32SNAPSHOT) CloseHandle;
644 module_first = (MODULE32) GetProcAddress(dll, "Module32First");
645 module_next = (MODULE32) GetProcAddress(dll, "Module32Next");
647 hModuleSnap = (*create_snap) (TH32CS_SNAPMODULE, 0);
648 if (hModuleSnap == INVALID_HANDLE_VALUE) {
650 DSOerr(DSO_F_WIN32_GLOBALLOOKUP, DSO_R_UNSUPPORTED);
654 me32.dwSize = sizeof(me32);
656 if (!(*module_first) (hModuleSnap, &me32)) {
657 (*close_snap) (hModuleSnap);
663 if ((ret.f = GetProcAddress(me32.hModule, name))) {
664 (*close_snap) (hModuleSnap);
668 } while ((*module_next) (hModuleSnap, &me32));
670 (*close_snap) (hModuleSnap);
674 #endif /* DSO_WIN32 */