crypto/dso/dso_win32.c

   1 /* dso_win32.c -*- mode:C; c-file-style: "eay" -*- */
   2 /* Written by Geoff Thorpe (geoff@geoffthorpe.net) for the OpenSSL
   3  * project 2000.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <string.h>
  61 #include "cryptlib.h"
  62 #include <openssl/dso.h>
  63
  64 #if !defined(DSO_WIN32)
  65 DSO_METHOD *DSO_METHOD_win32(void)
  66         {
  67         return NULL;
  68         }
  69 #else
  70
  71 /* Part of the hack in "win32_load" ... */
  72 #define DSO_MAX_TRANSLATED_SIZE 256
  73
  74 static int win32_load(DSO *dso);
  75 static int win32_unload(DSO *dso);
  76 static void *win32_bind_var(DSO *dso, const char *symname);
  77 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname);
  78 #if 0
  79 static int win32_unbind_var(DSO *dso, char *symname, void *symptr);
  80 static int win32_unbind_func(DSO *dso, char *symname, DSO_FUNC_TYPE symptr);
  81 static int win32_init(DSO *dso);
  82 static int win32_finish(DSO *dso);
  83 static long win32_ctrl(DSO *dso, int cmd, long larg, void *parg);
  84 #endif
  85 static char *win32_name_converter(DSO *dso, const char *filename);
  86 static char *win32_merger(DSO *dso, const char *filespec1,
  87         const char *filespec2);
  88
  89 static const char *openssl_strnchr(const char *string, int c, size_t len);
  90
  91 static DSO_METHOD dso_meth_win32 = {
  92         "OpenSSL 'win32' shared library method",
  93         win32_load,
  94         win32_unload,
  95         win32_bind_var,
  96         win32_bind_func,
  97 /* For now, "unbind" doesn't exist */
  98 #if 0
  99         NULL, /* unbind_var */
 100         NULL, /* unbind_func */
 101 #endif
 102         NULL, /* ctrl */
 103         win32_name_converter,
 104         win32_merger,
 105         NULL, /* init */
 106         NULL  /* finish */
 107         };
 108
 109 DSO_METHOD *DSO_METHOD_win32(void)
 110         {
 111         return(&dso_meth_win32);
 112         }
 113
 114 /* For this DSO_METHOD, our meth_data STACK will contain;
 115  * (i) a pointer to the handle (HINSTANCE) returned from
 116  *     LoadLibrary(), and copied.
 117  */
 118
 119 static int win32_load(DSO *dso)
 120         {
 121         HINSTANCE h = NULL, *p = NULL;
 122         /* See applicable comments from dso_dl.c */
 123         char *filename = DSO_convert_filename(dso, NULL);
 124
 125         if(filename == NULL)
 126                 {
 127                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
 128                 goto err;
 129                 }
 130         h = LoadLibrary(filename);
 131         if(h == NULL)
 132                 {
 133                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 134                 ERR_add_error_data(3, "filename(", filename, ")");
 135                 goto err;
 136                 }
 137         p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 138         if(p == NULL)
 139                 {
 140                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 141                 goto err;
 142                 }
 143         *p = h;
 144         if(!sk_push(dso->meth_data, (char *)p))
 145                 {
 146                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 147                 goto err;
 148                 }
 149         /* Success */
 150         dso->loaded_filename = filename;
 151         return(1);
 152 err:
 153         /* Cleanup !*/
 154         if(filename != NULL)
 155                 OPENSSL_free(filename);
 156         if(p != NULL)
 157                 OPENSSL_free(p);
 158         if(h != NULL)
 159                 FreeLibrary(h);
 160         return(0);
 161         }
 162
 163 static int win32_unload(DSO *dso)
 164         {
 165         HINSTANCE *p;
 166         if(dso == NULL)
 167                 {
 168                 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 169                 return(0);
 170                 }
 171         if(sk_num(dso->meth_data) < 1)
 172                 return(1);
 173         p = (HINSTANCE *)sk_pop(dso->meth_data);
 174         if(p == NULL)
 175                 {
 176                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 177                 return(0);
 178                 }
 179         if(!FreeLibrary(*p))
 180                 {
 181                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 182                 /* We should push the value back onto the stack in
 183                  * case of a retry. */
 184                 sk_push(dso->meth_data, (char *)p);
 185                 return(0);
 186                 }
 187         /* Cleanup */
 188         OPENSSL_free(p);
 189         return(1);
 190         }
 191
 192 /* Using GetProcAddress for variables? TODO: Check this out in
 193  * the Win32 API docs, there's probably a variant for variables. */
 194 static void *win32_bind_var(DSO *dso, const char *symname)
 195         {
 196         HINSTANCE *ptr;
 197         void *sym;
 198
 199         if((dso == NULL) || (symname == NULL))
 200                 {
 201                 DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 202                 return(NULL);
 203                 }
 204         if(sk_num(dso->meth_data) < 1)
 205                 {
 206                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
 207                 return(NULL);
 208                 }
 209         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 210         if(ptr == NULL)
 211                 {
 212                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
 213                 return(NULL);
 214                 }
 215         sym = GetProcAddress(*ptr, symname);
 216         if(sym == NULL)
 217                 {
 218                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
 219                 ERR_add_error_data(3, "symname(", symname, ")");
 220                 return(NULL);
 221                 }
 222         return(sym);
 223         }
 224
 225 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 226         {
 227         HINSTANCE *ptr;
 228         void *sym;
 229
 230         if((dso == NULL) || (symname == NULL))
 231                 {
 232                 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 233                 return(NULL);
 234                 }
 235         if(sk_num(dso->meth_data) < 1)
 236                 {
 237                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 238                 return(NULL);
 239                 }
 240         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 241         if(ptr == NULL)
 242                 {
 243                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 244                 return(NULL);
 245                 }
 246         sym = GetProcAddress(*ptr, symname);
 247         if(sym == NULL)
 248                 {
 249                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 250                 ERR_add_error_data(3, "symname(", symname, ")");
 251                 return(NULL);
 252                 }
 253         return((DSO_FUNC_TYPE)sym);
 254         }
 255
 256 struct file_st
 257         {
 258         const char *node; int nodelen;
 259         const char *device; int devicelen;
 260         const char *predir; int predirlen;
 261         const char *dir; int dirlen;
 262         const char *file; int filelen;
 263         };
 264
 265 static struct file_st *win32_splitter(DSO *dso, const char *filename,
 266         int assume_last_is_dir)
 267         {
 268         struct file_st *result = NULL;
 269         enum { IN_NODE, IN_DEVICE, IN_FILE } position;
 270         const char *start = filename;
 271
 272         if (!filename)
 273                 {
 274                 DSOerr(DSO_F_WIN32_MERGER,DSO_R_NO_FILENAME);
 275                 /*goto err;*/
 276                 return(NULL);
 277                 }
 278
 279         result = OPENSSL_malloc(sizeof(struct file_st));
 280         if(result == NULL)
 281                 {
 282                 DSOerr(DSO_F_WIN32_MERGER,
 283                         ERR_R_MALLOC_FAILURE);
 284                 return(NULL);
 285                 }
 286
 287         memset(result, 0, sizeof(struct file_st));
 288         position = IN_DEVICE;
 289
 290         if(filename[0] == '\\' && filename[1] == '\\'
 291                 || filename[0] == '/' && filename[1] == '/')
 292                 {
 293                 position = IN_NODE;
 294                 filename += 2;
 295                 start = filename;
 296                 result->node = start;
 297                 }
 298
 299         do
 300                 {
 301                 switch(filename[0])
 302                         {
 303                 case ':':
 304                         if(position != IN_DEVICE)
 305                                 {
 306                                 DSOerr(DSO_F_WIN32_MERGER,
 307                                         DSO_R_INCORRECT_FILE_SYNTAX);
 308                                 /*goto err;*/
 309                                 return(NULL);
 310                                 }
 311                         result->device = start;
 312                         result->devicelen = filename - start;
 313                         position = IN_FILE;
 314                         start = ++filename;
 315                         result->dir = start;
 316                         break;
 317                 case '\\':
 318                 case '/':
 319                         if(position == IN_NODE)
 320                                 {
 321                                 result->nodelen = filename - start;
 322                                 position = IN_FILE;
 323                                 start = ++filename;
 324                                 result->dir = start;
 325                                 }
 326                         else
 327                                 {
 328                                 filename++;
 329                                 result->dirlen += filename - start;
 330                                 }
 331                         break;
 332                 case '\0':
 333                         if(position == IN_NODE)
 334                                 {
 335                                 result->nodelen = filename - start;
 336                                 }
 337                         else
 338                                 {
 339                                 if(filename - start > 0)
 340                                         {
 341                                         if (assume_last_is_dir)
 342                                                 {
 343                                                 result->devicelen += filename - start;
 344                                                 }
 345                                         else
 346                                                 {
 347                                                 result->file = start;
 348                                                 result->filelen = filename - start;
 349                                                 }
 350                                         }
 351                                 }
 352                         break;
 353                 default:
 354                         filename++;
 355                         break;
 356                         }
 357                 }
 358         while(*filename);
 359
 360         if(!result->nodelen) result->node = NULL;
 361         if(!result->devicelen) result->device = NULL;
 362         if(!result->dirlen) result->dir = NULL;
 363         if(!result->filelen) result->file = NULL;
 364
 365         return(result);
 366         }
 367
 368 static char *win32_joiner(DSO *dso, const struct file_st *file_split)
 369         {
 370         int len = 0, offset = 0;
 371         char *result = NULL;
 372         const char *start;
 373
 374         if(!file_split)
 375                 {
 376                 DSOerr(DSO_F_WIN32_MERGER,
 377                                 ERR_R_PASSED_NULL_PARAMETER);
 378                 return(NULL);
 379                 }
 380         if(file_split->node)
 381                 {
 382                 len += 2 + file_split->nodelen; /* 2 for starting \\ */
 383                 if(file_split->predir || file_split->dir || file_split->file)
 384                         len++;  /* 1 for ending \ */
 385                 }
 386         else if(file_split->device)
 387                 {
 388                 len += file_split->devicelen + 1; /* 1 for ending : */
 389                 }
 390         len += file_split->predirlen;
 391         if(file_split->predir && (file_split->dir || file_split->file))
 392                 {
 393                 len++;  /* 1 for ending \ */
 394                 }
 395         len += file_split->dirlen;
 396         if(file_split->dir && file_split->file)
 397                 {
 398                 len++;  /* 1 for ending \ */
 399                 }
 400         len += file_split->filelen;
 401
 402         if(!len)
 403                 {
 404                 DSOerr(DSO_F_WIN32_MERGER, DSO_R_EMPTY_FILE_STRUCTURE);
 405                 return(NULL);
 406                 }
 407
 408         result = OPENSSL_malloc(len + 1);
 409         if (!result)
 410                 {
 411                 DSOerr(DSO_F_WIN32_MERGER,
 412                         ERR_R_MALLOC_FAILURE);
 413                 return(NULL);
 414                 }
 415
 416         if(file_split->node)
 417                 {
 418                 strcpy(&result[offset], "\\\\"); offset += 2;
 419                 strncpy(&result[offset], file_split->node,
 420                         file_split->nodelen); offset += file_split->nodelen;
 421                 if(file_split->predir || file_split->dir || file_split->file)
 422                         {
 423                         result[offset] = '\\'; offset++;
 424                         }
 425                 }
 426         else if(file_split->device)
 427                 {
 428                 strncpy(&result[offset], file_split->device,
 429                         file_split->devicelen); offset += file_split->devicelen;
 430                 result[offset] = ':'; offset++;
 431                 }
 432         start = file_split->predir;
 433         while(file_split->predirlen > (start - file_split->predir))
 434                 {
 435                 const char *end = openssl_strnchr(start, '/',
 436                         file_split->predirlen - (start - file_split->predir));
 437                 if(!end)
 438                         end = start
 439                                 + file_split->predirlen
 440                                 - (start - file_split->predir);
 441                 strncpy(&result[offset], start,
 442                         end - start); offset += end - start;
 443                 result[offset] = '\\'; offset++;
 444                 start = end + 1;
 445                 }
 446         if(file_split->predir && (file_split->dir || file_split->file))
 447                 {
 448                 result[offset] = '\\'; offset++;
 449                 }
 450         start = file_split->dir;
 451         while(file_split->dirlen > (start - file_split->dir))
 452                 {
 453                 const char *end = openssl_strnchr(start, '/',
 454                         file_split->dirlen - (start - file_split->dir));
 455                 if(!end)
 456                         end = start
 457                                 + file_split->dirlen
 458                                 - (start - file_split->dir);
 459                 strncpy(&result[offset], start,
 460                         end - start); offset += end - start;
 461                 result[offset] = '\\'; offset++;
 462                 start = end + 1;
 463                 }
 464         if(file_split->dir && file_split->file)
 465                 {
 466                 result[offset] = '\\'; offset++;
 467                 }
 468         strncpy(&result[offset], file_split->file,
 469                 file_split->filelen); offset += file_split->filelen;
 470         result[offset] = '\0';
 471         return(result);
 472         }
 473
 474 static char *win32_merger(DSO *dso, const char *filespec1, const char *filespec2)
 475         {
 476         char *merged = NULL;
 477         struct file_st *filespec1_split = NULL;
 478         struct file_st *filespec2_split = NULL;
 479
 480         if(!filespec1 && !filespec2)
 481                 {
 482                 DSOerr(DSO_F_WIN32_MERGER,
 483                                 ERR_R_PASSED_NULL_PARAMETER);
 484                 return(NULL);
 485                 }
 486         if (!filespec2)
 487                 {
 488                 merged = OPENSSL_malloc(strlen(filespec1) + 1);
 489                 if(!merged)
 490                         {
 491                         DSOerr(DSO_F_WIN32_MERGER,
 492                                 ERR_R_MALLOC_FAILURE);
 493                         return(NULL);
 494                         }
 495                 strcpy(merged, filespec1);
 496                 }
 497         else if (!filespec1)
 498                 {
 499                 merged = OPENSSL_malloc(strlen(filespec2) + 1);
 500                 if(!merged)
 501                         {
 502                         DSOerr(DSO_F_WIN32_MERGER,
 503                                 ERR_R_MALLOC_FAILURE);
 504                         return(NULL);
 505                         }
 506                 strcpy(merged, filespec2);
 507                 }
 508         else
 509                 {
 510                 filespec1_split = win32_splitter(dso, filespec1, 1);
 511                 if (!filespec1_split)
 512                         {
 513                         DSOerr(DSO_F_WIN32_MERGER,
 514                                 ERR_R_MALLOC_FAILURE);
 515                         return(NULL);
 516                         }
 517                 filespec2_split = win32_splitter(dso, filespec2, 0);
 518                 if (!filespec1_split)
 519                         {
 520                         DSOerr(DSO_F_WIN32_MERGER,
 521                                 ERR_R_MALLOC_FAILURE);
 522                         OPENSSL_free(filespec1_split);
 523                         return(NULL);
 524                         }
 525
 526                 /* Fill in into filespec1_split */
 527                 if (!filespec1_split->node && !filespec1_split->device)
 528                         {
 529                         filespec1_split->node = filespec2_split->node;
 530                         filespec1_split->nodelen = filespec2_split->nodelen;
 531                         filespec1_split->device = filespec2_split->device;
 532                         filespec1_split->devicelen = filespec2_split->devicelen;
 533                         }
 534                 if (!filespec1_split->dir)
 535                         {
 536                         filespec1_split->dir = filespec2_split->dir;
 537                         filespec1_split->dirlen = filespec2_split->dirlen;
 538                         }
 539                 else if (filespec1_split->dir[0] != '\\'
 540                         && filespec1_split->dir[0] != '/')
 541                         {
 542                         filespec1_split->predir = filespec2_split->dir;
 543                         filespec1_split->predirlen = filespec2_split->dirlen;
 544                         }
 545                 if (!filespec1_split->file)
 546                         {
 547                         filespec1_split->file = filespec2_split->file;
 548                         filespec1_split->filelen = filespec2_split->filelen;
 549                         }
 550
 551                 merged = win32_joiner(dso, filespec1_split);
 552                 }
 553         return(merged);
 554         }
 555
 556 static char *win32_name_converter(DSO *dso, const char *filename)
 557         {
 558         char *translated;
 559         int len, transform;
 560
 561         len = strlen(filename);
 562         transform = ((strstr(filename, "/") == NULL) &&
 563                         (strstr(filename, "\\") == NULL) &&
 564                         (strstr(filename, ":") == NULL));
 565         if(transform)
 566                 /* We will convert this to "%s.dll" */
 567                 translated = OPENSSL_malloc(len + 5);
 568         else
 569                 /* We will simply duplicate filename */
 570                 translated = OPENSSL_malloc(len + 1);
 571         if(translated == NULL)
 572                 {
 573                 DSOerr(DSO_F_WIN32_NAME_CONVERTER,
 574                                 DSO_R_NAME_TRANSLATION_FAILED);
 575                 return(NULL);
 576                 }
 577         if(transform)
 578                 sprintf(translated, "%s.dll", filename);
 579         else
 580                 sprintf(translated, "%s", filename);
 581         return(translated);
 582         }
 583
 584 static const char *openssl_strnchr(const char *string, int c, size_t len)
 585         {
 586         size_t i;
 587         const char *p;
 588         for (i = 0, p = string; i < len && *p; i++, p++)
 589                 {
 590                 if (*p == c)
 591                         return p;
 592                 }
 593         return NULL;
 594         }
 595
 596
 597 #endif /* OPENSSL_SYS_WIN32 */