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 #ifndef OPENSSL_SYS_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 DSO_METHOD dso_meth_win32 = {
  90         "OpenSSL 'win32' shared library method",
  91         win32_load,
  92         win32_unload,
  93         win32_bind_var,
  94         win32_bind_func,
  95 /* For now, "unbind" doesn't exist */
  96 #if 0
  97         NULL, /* unbind_var */
  98         NULL, /* unbind_func */
  99 #endif
 100         NULL, /* ctrl */
 101         win32_name_converter,
 102         win32_merger,
 103         NULL, /* init */
 104         NULL  /* finish */
 105         };
 106
 107 DSO_METHOD *DSO_METHOD_win32(void)
 108         {
 109         return(&dso_meth_win32);
 110         }
 111
 112 /* For this DSO_METHOD, our meth_data STACK will contain;
 113  * (i) a pointer to the handle (HINSTANCE) returned from
 114  *     LoadLibrary(), and copied.
 115  */
 116
 117 static int win32_load(DSO *dso)
 118         {
 119         HINSTANCE h = NULL, *p = NULL;
 120         /* See applicable comments from dso_dl.c */
 121         char *filename = DSO_convert_filename(dso, NULL);
 122
 123         if(filename == NULL)
 124                 {
 125                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_NO_FILENAME);
 126                 goto err;
 127                 }
 128         h = LoadLibrary(filename);
 129         if(h == NULL)
 130                 {
 131                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_LOAD_FAILED);
 132                 ERR_add_error_data(3, "filename(", filename, ")");
 133                 goto err;
 134                 }
 135         p = (HINSTANCE *)OPENSSL_malloc(sizeof(HINSTANCE));
 136         if(p == NULL)
 137                 {
 138                 DSOerr(DSO_F_WIN32_LOAD,ERR_R_MALLOC_FAILURE);
 139                 goto err;
 140                 }
 141         *p = h;
 142         if(!sk_push(dso->meth_data, (char *)p))
 143                 {
 144                 DSOerr(DSO_F_WIN32_LOAD,DSO_R_STACK_ERROR);
 145                 goto err;
 146                 }
 147         /* Success */
 148         dso->loaded_filename = filename;
 149         return(1);
 150 err:
 151         /* Cleanup !*/
 152         if(filename != NULL)
 153                 OPENSSL_free(filename);
 154         if(p != NULL)
 155                 OPENSSL_free(p);
 156         if(h != NULL)
 157                 FreeLibrary(h);
 158         return(0);
 159         }
 160
 161 static int win32_unload(DSO *dso)
 162         {
 163         HINSTANCE *p;
 164         if(dso == NULL)
 165                 {
 166                 DSOerr(DSO_F_WIN32_UNLOAD,ERR_R_PASSED_NULL_PARAMETER);
 167                 return(0);
 168                 }
 169         if(sk_num(dso->meth_data) < 1)
 170                 return(1);
 171         p = (HINSTANCE *)sk_pop(dso->meth_data);
 172         if(p == NULL)
 173                 {
 174                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_NULL_HANDLE);
 175                 return(0);
 176                 }
 177         if(!FreeLibrary(*p))
 178                 {
 179                 DSOerr(DSO_F_WIN32_UNLOAD,DSO_R_UNLOAD_FAILED);
 180                 /* We should push the value back onto the stack in
 181                  * case of a retry. */
 182                 sk_push(dso->meth_data, (char *)p);
 183                 return(0);
 184                 }
 185         /* Cleanup */
 186         OPENSSL_free(p);
 187         return(1);
 188         }
 189
 190 /* Using GetProcAddress for variables? TODO: Check this out in
 191  * the Win32 API docs, there's probably a variant for variables. */
 192 static void *win32_bind_var(DSO *dso, const char *symname)
 193         {
 194         HINSTANCE *ptr;
 195         void *sym;
 196
 197         if((dso == NULL) || (symname == NULL))
 198                 {
 199                 DSOerr(DSO_F_WIN32_BIND_VAR,ERR_R_PASSED_NULL_PARAMETER);
 200                 return(NULL);
 201                 }
 202         if(sk_num(dso->meth_data) < 1)
 203                 {
 204                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_STACK_ERROR);
 205                 return(NULL);
 206                 }
 207         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 208         if(ptr == NULL)
 209                 {
 210                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_NULL_HANDLE);
 211                 return(NULL);
 212                 }
 213         sym = GetProcAddress(*ptr, symname);
 214         if(sym == NULL)
 215                 {
 216                 DSOerr(DSO_F_WIN32_BIND_VAR,DSO_R_SYM_FAILURE);
 217                 ERR_add_error_data(3, "symname(", symname, ")");
 218                 return(NULL);
 219                 }
 220         return(sym);
 221         }
 222
 223 static DSO_FUNC_TYPE win32_bind_func(DSO *dso, const char *symname)
 224         {
 225         HINSTANCE *ptr;
 226         void *sym;
 227
 228         if((dso == NULL) || (symname == NULL))
 229                 {
 230                 DSOerr(DSO_F_WIN32_BIND_FUNC,ERR_R_PASSED_NULL_PARAMETER);
 231                 return(NULL);
 232                 }
 233         if(sk_num(dso->meth_data) < 1)
 234                 {
 235                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_STACK_ERROR);
 236                 return(NULL);
 237                 }
 238         ptr = (HINSTANCE *)sk_value(dso->meth_data, sk_num(dso->meth_data) - 1);
 239         if(ptr == NULL)
 240                 {
 241                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_NULL_HANDLE);
 242                 return(NULL);
 243                 }
 244         sym = GetProcAddress(*ptr, symname);
 245         if(sym == NULL)
 246                 {
 247                 DSOerr(DSO_F_WIN32_BIND_FUNC,DSO_R_SYM_FAILURE);
 248                 ERR_add_error_data(3, "symname(", symname, ")");
 249                 return(NULL);
 250                 }
 251         return((DSO_FUNC_TYPE)sym);
 252         }
 253
 254 struct file_st
 255         {
 256         const char *node; int nodelen;
 257         const char *device; int devicelen;
 258         const char *predir; int predirlen;
 259         const char *dir; int dirlen;
 260         const char *file; int filelen;
 261         }
 262
 263 static struct file_st *win32_splitter(DSO *dso, const char *filename,
 264         int assume_last_is_dir)
 265         {
 266         struct file_st *result = NULL;
 267         enum { IN_NODE, IN_DEVICE, IN_FILE } position;
 268         const char *start = filename;
 269
 270         if (!filename)
 271                 {
 272                 DSOerr(DSO_F_WIN32_MERGER,DSO_R_NO_FILENAME);
 273                 goto err;
 274                 }
 275
 276         result = OPENSSL_malloc(sizeof(struct file_st));
 277         if(result == NULL)
 278                 {
 279                 DSOerr(DSO_F_WIN32_MERGER,
 280                         ERR_R_MALLOC_FAILURE);
 281                 return(NULL);
 282                 }
 283
 284         memset(result, 0, sizeof(struct file_st));
 285         position = IN_DEVICE;
 286
 287         if(filename[0] == '\\' && filename[1] == '\\'
 288                 || filename[0] == '/' && filename[1] == '/')
 289                 {
 290                 position = IN_NODE;
 291                 filename += 2;
 292                 start = filename;
 293                 result->node = start;
 294                 }
 295
 296         do
 297                 {
 298                 switch(filename[0])
 299                         {
 300                 case ':':
 301                         if(position != IN_DEVICE)
 302                                 {
 303                                 DSOerr(DSO_F_WIN32_MERGER,
 304                                         DSO_R_INCORRECT_FILE_SYNTAX);
 305                                 goto err;
 306                                 }
 307                         result->device = start;
 308                         result->devicelen = filename - start;
 309                         position = IN_FILE;
 310                         start = ++filename;
 311                         result->dir = start;
 312                         break;
 313                 case '\\':
 314                 case '/':
 315                         if(position == IN_NODE)
 316                                 {
 317                                 result->nodelen = filename - start;
 318                                 position = IN_FILE;
 319                                 start = ++filename;
 320                                 result->dir = start;
 321                                 }
 322                         else
 323                                 {
 324                                 filename++;
 325                                 result->dirlen += filename - start;
 326                                 }
 327                         break;
 328                 case '\0':
 329                         if(position == IN_NODE)
 330                                 {
 331                                 result->nodelen = filename - start;
 332                                 }
 333                         else
 334                                 {
 335                                 if(filename - start > 0)
 336                                         {
 337                                         if (assume_last_is_dir)
 338                                                 {
 339                                                 result->devicelen += filename - start;
 340                                                 }
 341                                         else
 342                                                 {
 343                                                 result->file = start;
 344                                                 result->filelen = filename - start;
 345                                                 }
 346                                         }
 347                                 }
 348                         break;
 349                 default:
 350                         filename++;
 351                         break;
 352                         }
 353                 }
 354         while(*filename);
 355
 356         if(!result->nodelen) result->node = NULL;
 357         if(!result->devicelen) result->devicce = NULL;
 358         if(!result->dirlen) result->dir = NULL;
 359         if(!result->filelen) result->file = NULL;
 360
 361         return(result);
 362         }
 363
 364 static char *win32_joiner(DSO *dso, const file_st *file_split)
 365         {
 366         int len = 0, offset = 0;
 367         char *result = NULL;
 368         const char *start;
 369
 370         if(!file_split)
 371                 {
 372                 DSOerr(DSO_F_WIN32_MERGER,
 373                                 ERR_R_PASSED_NULL_PARAMETER);
 374                 return(NULL);
 375                 }
 376         if(file_split->node)
 377                 {
 378                 len += 2 + file_split->nodelen; /* 2 for starting \\ */
 379                 if(file_split->predir || file_split->dir || file_split->file)
 380                         len++;  /* 1 for ending \ */
 381                 }
 382         else if(file_split->device)
 383                 {
 384                 len += file_split->devicelen + 1; /* 1 for ending : */
 385                 }
 386         len += file_split->predirlen;
 387         if(file_split->predir && (file_split->dir || file_split->file))
 388                 {
 389                 len++;  /* 1 for ending \ */
 390                 }
 391         len += file_split->dirlen;
 392         if(file_split->dir && file_split->file)
 393                 {
 394                 len++;  /* 1 for ending \ */
 395                 }
 396         len += file_split->filelen;
 397
 398         if(!len)
 399                 {
 400                 DSOerr(DSO_F_WIN32_MERGER, DSO_R_EMPTY_FILE_STRUCTURE);
 401                 return(NULL);
 402                 }
 403
 404         result = OPENSSL_malloc(len + 1);
 405         if (!result)
 406                 {
 407                 DSOerr(DSO_F_WIN32_MERGER,
 408                         ERR_R_MALLOC_FAILURE);
 409                 return(NULL);
 410                 }
 411
 412         if(file_split->node)
 413                 {
 414                 strcpy(&result[offset], "\\\\"); offset += 2;
 415                 strncpy(&result[offset], file_split->node,
 416                         file_split->nodelen); offset += file_split->nodelen;
 417                 if(file_split->predir || file_split->dir || file_split->file)
 418                         {
 419                         result[offset] = '\\'; offset++;
 420                         }
 421                 }
 422         else if(file_split->device)
 423                 {
 424                 strncpy(&result[offset], file_split->device,
 425                         file_split->devicelen); offset += file_split->devicelen;
 426                 result[offset] = ':'; offset++;
 427                 }
 428         start = file_split->predir;
 429         while(file_split->predirlen > (start - file_split->predir))
 430                 {
 431                 const char *end = strnchr(start, '/',
 432                         file_split->predirlen - (start - file_split->predir));
 433                 if(!end)
 434                         end = start
 435                                 + file_split->predirlen
 436                                 - (start - file_split->predir);
 437                 strncpy(&result[offset], start,
 438                         end - start); offset += end - start;
 439                 result[offset] = '\\'; offset++;
 440                 start = end + 1;
 441                 }
 442         if(file_split->predir && (file_split->dir || file_split->file))
 443                 {
 444                 result[offset] = '\\'; offset++;
 445                 }
 446         start = file_split->dir;
 447         while(file_split->dirlen > (start - file_split->dir))
 448                 {
 449                 const char *end = strnchr(start, '/',
 450                         file_split->dirlen - (start - file_split->dir));
 451                 if(!end)
 452                         end = start
 453                                 + file_split->dirlen
 454                                 - (start - file_split->dir);
 455                 strncpy(&result[offset], start,
 456                         end - start); offset += end - start;
 457                 result[offset] = '\\'; offset++;
 458                 start = end + 1;
 459                 }
 460         if(file_split->dir && file_split->file)
 461                 {
 462                 result[offset] = '\\'; offset++;
 463                 }
 464         strncpy(&result[offset], file_split->file,
 465                 file_split->filelen); offset += file_split->filelen;
 466         result[offset] = '\0';
 467         return(result);
 468         }
 469
 470 static char *win32_merger(DSO *dso, const char *filespec1, const char *filespec2)
 471         {
 472         char *merged = NULL;
 473         struct file_st *filespec1_split = NULL;
 474         struct file_st *filespec2_split = NULL;
 475
 476         if(!filespec1 && !filespec2)
 477                 {
 478                 DSOerr(DSO_F_WIN32_MERGER,
 479                                 ERR_R_PASSED_NULL_PARAMETER);
 480                 return(NULL);
 481                 }
 482         if (!filespec2)
 483                 {
 484                 merged = OPENSSL_malloc(strlen(filespec1) + 1);
 485                 if(!merged)
 486                         {
 487                         DSOerr(DSO_F_WIN32_MERGER,
 488                                 ERR_R_MALLOC_FAILURE);
 489                         return(NULL);
 490                         }
 491                 strcpy(merged, filespec1);
 492                 }
 493         else if (!filespec1)
 494                 {
 495                 merged = OPENSSL_malloc(strlen(filespec2) + 1);
 496                 if(!merged)
 497                         {
 498                         DSOerr(DSO_F_WIN32_MERGER,
 499                                 ERR_R_MALLOC_FAILURE);
 500                         return(NULL);
 501                         }
 502                 strcpy(merged, filespec2);
 503                 }
 504         else
 505                 {
 506                 filespec1_split = win32_splitter(dso, filespec1, 1);
 507                 if (!filespec1_split)
 508                         {
 509                         DSOerr(DSO_F_WIN32_MERGER,
 510                                 ERR_R_MALLOC_FAILURE);
 511                         return(NULL);
 512                         }
 513                 filespec2_split = win32_splitter(dso, filespec2, 0);
 514                 if (!filespec1_split)
 515                         {
 516                         DSOerr(DSO_F_WIN32_MERGER,
 517                                 ERR_R_MALLOC_FAILURE);
 518                         OPENSSL_free(filespec1_split);
 519                         return(NULL);
 520                         }
 521
 522                 /* Fill in into filespec1_split */
 523                 if (!filespec1_split->node && !filespec1_split->device)
 524                         {
 525                         filespec1_split->node = filespec2_split->node;
 526                         filespec1_split->nodelen = filespec2_split->nodelen;
 527                         filespec1_split->device = filespec2_split->device;
 528                         filespec1_split->devicelen = filespec2_split->devicelen;
 529                         }
 530                 if (!filespec1_split->dir)
 531                         {
 532                         filespec1_split->dir = filespec2_split->dir;
 533                         filespec1_split->dirlen = filespec2_split->dirlen;
 534                         }
 535                 else if (filespec1_split->dir[0] != '\\'
 536                         && filespec1_split->dir[0] != '/')
 537                         {
 538                         filespec1_split->predir = filespec2_split->dir;
 539                         filespec1_split->predirlen = filespec2_split->dirlen;
 540                         }
 541                 if (!filespec1_split->file)
 542                         {
 543                         filespec1_split->file = filespec2_split->file;
 544                         filespec1_split->filelen = filespec2_split->filelen;
 545                         }
 546
 547                 merged = win32_joiner(dso, filespec1_split);
 548                 }
 549         return(merged);
 550         }
 551
 552 static char *win32_name_converter(DSO *dso, const char *filename)
 553         {
 554         char *translated;
 555         int len, transform;
 556
 557         len = strlen(filename);
 558         transform = ((strstr(filename, "/") == NULL) &&
 559                         (strstr(filename, "\\") == NULL) &&
 560                         (strstr(filename, ":") == NULL));
 561         if(transform)
 562                 /* We will convert this to "%s.dll" */
 563                 translated = OPENSSL_malloc(len + 5);
 564         else
 565                 /* We will simply duplicate filename */
 566                 translated = OPENSSL_malloc(len + 1);
 567         if(translated == NULL)
 568                 {
 569                 DSOerr(DSO_F_WIN32_NAME_CONVERTER,
 570                                 DSO_R_NAME_TRANSLATION_FAILED);
 571                 return(NULL);
 572                 }
 573         if(transform)
 574                 sprintf(translated, "%s.dll", filename);
 575         else
 576                 sprintf(translated, "%s", filename);
 577         return(translated);
 578         }
 579
 580 #endif /* OPENSSL_SYS_WIN32 */