crypto/cryptlib.c

   1 /* crypto/cryptlib.c */
   2 /* ====================================================================
   3  * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  *
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in
  14  *    the documentation and/or other materials provided with the
  15  *    distribution.
  16  *
  17  * 3. All advertising materials mentioning features or use of this
  18  *    software must display the following acknowledgment:
  19  *    "This product includes software developed by the OpenSSL Project
  20  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  21  *
  22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23  *    endorse or promote products derived from this software without
  24  *    prior written permission. For written permission, please contact
  25  *    openssl-core@openssl.org.
  26  *
  27  * 5. Products derived from this software may not be called "OpenSSL"
  28  *    nor may "OpenSSL" appear in their names without prior written
  29  *    permission of the OpenSSL Project.
  30  *
  31  * 6. Redistributions of any form whatsoever must retain the following
  32  *    acknowledgment:
  33  *    "This product includes software developed by the OpenSSL Project
  34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  35  *
  36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47  * OF THE POSSIBILITY OF SUCH DAMAGE.
  48  * ====================================================================
  49  *
  50  * This product includes cryptographic software written by Eric Young
  51  * (eay@cryptsoft.com).  This product includes software written by Tim
  52  * Hudson (tjh@cryptsoft.com).
  53  *
  54  */
  55 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  56  * All rights reserved.
  57  *
  58  * This package is an SSL implementation written
  59  * by Eric Young (eay@cryptsoft.com).
  60  * The implementation was written so as to conform with Netscapes SSL.
  61  *
  62  * This library is free for commercial and non-commercial use as long as
  63  * the following conditions are aheared to.  The following conditions
  64  * apply to all code found in this distribution, be it the RC4, RSA,
  65  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  66  * included with this distribution is covered by the same copyright terms
  67  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  68  *
  69  * Copyright remains Eric Young's, and as such any Copyright notices in
  70  * the code are not to be removed.
  71  * If this package is used in a product, Eric Young should be given attribution
  72  * as the author of the parts of the library used.
  73  * This can be in the form of a textual message at program startup or
  74  * in documentation (online or textual) provided with the package.
  75  *
  76  * Redistribution and use in source and binary forms, with or without
  77  * modification, are permitted provided that the following conditions
  78  * are met:
  79  * 1. Redistributions of source code must retain the copyright
  80  *    notice, this list of conditions and the following disclaimer.
  81  * 2. Redistributions in binary form must reproduce the above copyright
  82  *    notice, this list of conditions and the following disclaimer in the
  83  *    documentation and/or other materials provided with the distribution.
  84  * 3. All advertising materials mentioning features or use of this software
  85  *    must display the following acknowledgement:
  86  *    "This product includes cryptographic software written by
  87  *     Eric Young (eay@cryptsoft.com)"
  88  *    The word 'cryptographic' can be left out if the rouines from the library
  89  *    being used are not cryptographic related :-).
  90  * 4. If you include any Windows specific code (or a derivative thereof) from
  91  *    the apps directory (application code) you must include an acknowledgement:
  92  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  95  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  97  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  98  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  99  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 100  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 101  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 102  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 103  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 104  * SUCH DAMAGE.
 105  *
 106  * The licence and distribution terms for any publically available version or
 107  * derivative of this code cannot be changed.  i.e. this code cannot simply be
 108  * copied and put under another distribution licence
 109  * [including the GNU Public Licence.]
 110  */
 111 /* ====================================================================
 112  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 113  * ECDH support in OpenSSL originally developed by
 114  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
 115  */
 116
 117 #include "internal/cryptlib.h"
 118 #include <openssl/safestack.h>
 119
 120 #if     defined(__i386)   || defined(__i386__)   || defined(_M_IX86) || \
 121         defined(__INTEL__) || \
 122         defined(__x86_64) || defined(__x86_64__) || \
 123         defined(_M_AMD64) || defined(_M_X64)
 124
 125 extern unsigned int OPENSSL_ia32cap_P[4];
 126 unsigned int *OPENSSL_ia32cap_loc(void)
 127 {
 128     return OPENSSL_ia32cap_P;
 129 }
 130
 131 # if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
 132 #include <stdio.h>
 133 #  define OPENSSL_CPUID_SETUP
 134 typedef uint64_t IA32CAP;
 135 void OPENSSL_cpuid_setup(void)
 136 {
 137     static int trigger = 0;
 138     IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
 139     IA32CAP vec;
 140     char *env;
 141
 142     if (trigger)
 143         return;
 144
 145     trigger = 1;
 146     if ((env = getenv("OPENSSL_ia32cap"))) {
 147         int off = (env[0] == '~') ? 1 : 0;
 148 #  if defined(_WIN32)
 149         if (!sscanf(env + off, "%I64i", &vec))
 150             vec = strtoul(env + off, NULL, 0);
 151 #  else
 152         if (!sscanf(env + off, "%lli", (long long *)&vec))
 153             vec = strtoul(env + off, NULL, 0);
 154 #  endif
 155         if (off)
 156             vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~vec;
 157         else if (env[0] == ':')
 158             vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
 159
 160         OPENSSL_ia32cap_P[2] = 0;
 161         if ((env = strchr(env, ':'))) {
 162             unsigned int vecx;
 163             env++;
 164             off = (env[0] == '~') ? 1 : 0;
 165             vecx = strtoul(env + off, NULL, 0);
 166             if (off)
 167                 OPENSSL_ia32cap_P[2] &= ~vecx;
 168             else
 169                 OPENSSL_ia32cap_P[2] = vecx;
 170         }
 171     } else
 172         vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
 173
 174     /*
 175      * |(1<<10) sets a reserved bit to signal that variable
 176      * was initialized already... This is to avoid interference
 177      * with cpuid snippets in ELF .init segment.
 178      */
 179     OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10);
 180     OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32);
 181 }
 182 # else
 183 unsigned int OPENSSL_ia32cap_P[4];
 184 # endif
 185
 186 #else
 187 unsigned int *OPENSSL_ia32cap_loc(void)
 188 {
 189     return NULL;
 190 }
 191 #endif
 192 int OPENSSL_NONPIC_relocated = 0;
 193 #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
 194 void OPENSSL_cpuid_setup(void)
 195 {
 196 }
 197 #endif
 198
 199 #if (defined(_WIN32) || defined(__CYGWIN__)) && defined(_WINDLL)
 200 # ifdef __CYGWIN__
 201 /* pick DLL_[PROCESS|THREAD]_[ATTACH|DETACH] definitions */
 202 #  include <windows.h>
 203 /*
 204  * this has side-effect of _WIN32 getting defined, which otherwise is
 205  * mutually exclusive with __CYGWIN__...
 206  */
 207 # endif
 208
 209 /*
 210  * All we really need to do is remove the 'error' state when a thread
 211  * detaches
 212  */
 213
 214 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 215 {
 216     switch (fdwReason) {
 217     case DLL_PROCESS_ATTACH:
 218         OPENSSL_cpuid_setup();
 219 # if defined(_WIN32_WINNT)
 220         {
 221             IMAGE_DOS_HEADER *dos_header = (IMAGE_DOS_HEADER *) hinstDLL;
 222             IMAGE_NT_HEADERS *nt_headers;
 223
 224             if (dos_header->e_magic == IMAGE_DOS_SIGNATURE) {
 225                 nt_headers = (IMAGE_NT_HEADERS *) ((char *)dos_header
 226                                                    + dos_header->e_lfanew);
 227                 if (nt_headers->Signature == IMAGE_NT_SIGNATURE &&
 228                     hinstDLL !=
 229                     (HINSTANCE) (nt_headers->OptionalHeader.ImageBase))
 230                     OPENSSL_NONPIC_relocated = 1;
 231             }
 232         }
 233 # endif
 234         break;
 235     case DLL_THREAD_ATTACH:
 236         break;
 237     case DLL_THREAD_DETACH:
 238         break;
 239     case DLL_PROCESS_DETACH:
 240         break;
 241     }
 242     return (TRUE);
 243 }
 244 #endif
 245
 246 #if defined(_WIN32) && !defined(__CYGWIN__)
 247 # include <tchar.h>
 248 # include <signal.h>
 249 # ifdef __WATCOMC__
 250 #  if defined(_UNICODE) || defined(__UNICODE__)
 251 #   define _vsntprintf _vsnwprintf
 252 #  else
 253 #   define _vsntprintf _vsnprintf
 254 #  endif
 255 # endif
 256 # ifdef _MSC_VER
 257 #  define alloca _alloca
 258 # endif
 259
 260 # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
 261 int OPENSSL_isservice(void)
 262 {
 263     HWINSTA h;
 264     DWORD len;
 265     WCHAR *name;
 266     static union {
 267         void *p;
 268         FARPROC f;
 269     } _OPENSSL_isservice = {
 270         NULL
 271     };
 272
 273     if (_OPENSSL_isservice.p == NULL) {
 274         HANDLE mod = GetModuleHandle(NULL);
 275         if (mod != NULL)
 276             _OPENSSL_isservice.f = GetProcAddress(mod, "_OPENSSL_isservice");
 277         if (_OPENSSL_isservice.p == NULL)
 278             _OPENSSL_isservice.p = (void *)-1;
 279     }
 280
 281     if (_OPENSSL_isservice.p != (void *)-1)
 282         return (*_OPENSSL_isservice.f) ();
 283
 284     h = GetProcessWindowStation();
 285     if (h == NULL)
 286         return -1;
 287
 288     if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) ||
 289         GetLastError() != ERROR_INSUFFICIENT_BUFFER)
 290         return -1;
 291
 292     if (len > 512)
 293         return -1;              /* paranoia */
 294     len++, len &= ~1;           /* paranoia */
 295     name = (WCHAR *)alloca(len + sizeof(WCHAR));
 296     if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len))
 297         return -1;
 298
 299     len++, len &= ~1;           /* paranoia */
 300     name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */
 301 #  if 1
 302     /*
 303      * This doesn't cover "interactive" services [working with real
 304      * WinSta0's] nor programs started non-interactively by Task Scheduler
 305      * [those are working with SAWinSta].
 306      */
 307     if (wcsstr(name, L"Service-0x"))
 308         return 1;
 309 #  else
 310     /* This covers all non-interactive programs such as services. */
 311     if (!wcsstr(name, L"WinSta0"))
 312         return 1;
 313 #  endif
 314     else
 315         return 0;
 316 }
 317 # else
 318 int OPENSSL_isservice(void)
 319 {
 320     return 0;
 321 }
 322 # endif
 323
 324 void OPENSSL_showfatal(const char *fmta, ...)
 325 {
 326     va_list ap;
 327     TCHAR buf[256];
 328     const TCHAR *fmt;
 329 # ifdef STD_ERROR_HANDLE        /* what a dirty trick! */
 330     HANDLE h;
 331
 332     if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
 333         GetFileType(h) != FILE_TYPE_UNKNOWN) {
 334         /* must be console application */
 335         int len;
 336         DWORD out;
 337
 338         va_start(ap, fmta);
 339         len = _vsnprintf((char *)buf, sizeof(buf), fmta, ap);
 340         WriteFile(h, buf, len < 0 ? sizeof(buf) : (DWORD) len, &out, NULL);
 341         va_end(ap);
 342         return;
 343     }
 344 # endif
 345
 346     if (sizeof(TCHAR) == sizeof(char))
 347         fmt = (const TCHAR *)fmta;
 348     else
 349         do {
 350             int keepgoing;
 351             size_t len_0 = strlen(fmta) + 1, i;
 352             WCHAR *fmtw;
 353
 354             fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
 355             if (fmtw == NULL) {
 356                 fmt = (const TCHAR *)L"no stack?";
 357                 break;
 358             }
 359             if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0))
 360                 for (i = 0; i < len_0; i++)
 361                     fmtw[i] = (WCHAR)fmta[i];
 362             for (i = 0; i < len_0; i++) {
 363                 if (fmtw[i] == L'%')
 364                     do {
 365                         keepgoing = 0;
 366                         switch (fmtw[i + 1]) {
 367                         case L'0':
 368                         case L'1':
 369                         case L'2':
 370                         case L'3':
 371                         case L'4':
 372                         case L'5':
 373                         case L'6':
 374                         case L'7':
 375                         case L'8':
 376                         case L'9':
 377                         case L'.':
 378                         case L'*':
 379                         case L'-':
 380                             i++;
 381                             keepgoing = 1;
 382                             break;
 383                         case L's':
 384                             fmtw[i + 1] = L'S';
 385                             break;
 386                         case L'S':
 387                             fmtw[i + 1] = L's';
 388                             break;
 389                         case L'c':
 390                             fmtw[i + 1] = L'C';
 391                             break;
 392                         case L'C':
 393                             fmtw[i + 1] = L'c';
 394                             break;
 395                         }
 396                     } while (keepgoing);
 397             }
 398             fmt = (const TCHAR *)fmtw;
 399         } while (0);
 400
 401     va_start(ap, fmta);
 402     _vsntprintf(buf, OSSL_NELEM(buf) - 1, fmt, ap);
 403     buf[OSSL_NELEM(buf) - 1] = _T('\0');
 404     va_end(ap);
 405
 406 # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
 407     /* this -------------v--- guards NT-specific calls */
 408     if (check_winnt() && OPENSSL_isservice() > 0) {
 409         HANDLE hEventLog = RegisterEventSource(NULL, _T("OpenSSL"));
 410
 411         if (hEventLog != NULL) {
 412             const TCHAR *pmsg = buf;
 413
 414             if (!ReportEvent(hEventLog, EVENTLOG_ERROR_TYPE, 0, 0, NULL,
 415                              1, 0, &pmsg, NULL)) {
 416 #if defined(DEBUG)
 417                 /*
 418                  * We are in a situation where we tried to report a critical
 419                  * error and this failed for some reason. As a last resort,
 420                  * in debug builds, send output to the debugger or any other
 421                  * tool like DebugView which can monitor the output.
 422                  */
 423                 OutputDebugString(pmsg);
 424 #endif
 425             }
 426
 427             (void)DeregisterEventSource(hEventLog);
 428         }
 429     } else
 430 # endif
 431         MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
 432 }
 433 #else
 434 void OPENSSL_showfatal(const char *fmta, ...)
 435 {
 436 #ifndef OPENSSL_NO_STDIO
 437     va_list ap;
 438
 439     va_start(ap, fmta);
 440     vfprintf(stderr, fmta, ap);
 441     va_end(ap);
 442 #endif
 443 }
 444
 445 int OPENSSL_isservice(void)
 446 {
 447     return 0;
 448 }
 449 #endif
 450
 451 void OpenSSLDie(const char *file, int line, const char *assertion)
 452 {
 453     OPENSSL_showfatal
 454         ("%s(%d): OpenSSL internal error, assertion failed: %s\n", file, line,
 455          assertion);
 456 #if !defined(_WIN32) || defined(__CYGWIN__)
 457     abort();
 458 #else
 459     /*
 460      * Win32 abort() customarily shows a dialog, but we just did that...
 461      */
 462 # if !defined(_WIN32_WCE)
 463     raise(SIGABRT);
 464 # endif
 465     _exit(3);
 466 #endif
 467 }
 468
 469 int CRYPTO_memcmp(const void *in_a, const void *in_b, size_t len)
 470 {
 471     size_t i;
 472     const unsigned char *a = in_a;
 473     const unsigned char *b = in_b;
 474     unsigned char x = 0;
 475
 476     for (i = 0; i < len; i++)
 477         x |= a[i] ^ b[i];
 478
 479     return x;
 480 }