crypto/cryptlib.c

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