2 * Copyright 1998-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (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
10 /* ====================================================================
11 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
12 * ECDH support in OpenSSL originally developed by
13 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project.
16 #include "internal/cryptlib_int.h"
17 #include <openssl/safestack.h>
19 #if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
20 defined(__x86_64) || defined(__x86_64__) || \
21 defined(_M_AMD64) || defined(_M_X64)
23 extern unsigned int OPENSSL_ia32cap_P[4];
25 # if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
27 # define OPENSSL_CPUID_SETUP
28 typedef uint64_t IA32CAP;
29 void OPENSSL_cpuid_setup(void)
31 static int trigger = 0;
32 IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
40 if ((env = getenv("OPENSSL_ia32cap"))) {
41 int off = (env[0] == '~') ? 1 : 0;
43 if (!sscanf(env + off, "%I64i", &vec))
44 vec = strtoul(env + off, NULL, 0);
46 if (!sscanf(env + off, "%lli", (long long *)&vec))
47 vec = strtoul(env + off, NULL, 0);
51 vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~mask;
54 * User disables FXSR bit, mask even other capabilities
55 * that operate exclusively on XMM, so we don't have to
56 * double-check all the time. We mask PCLMULQDQ, AMD XOP,
57 * AES-NI and AVX. Formally speaking we don't have to
58 * do it in x86_64 case, but we can safely assume that
59 * x86_64 users won't actually flip this flag.
61 vec &= ~((IA32CAP)(1<<1|1<<11|1<<25|1<<28) << 32);
63 } else if (env[0] == ':') {
64 vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
67 if ((env = strchr(env, ':'))) {
70 off = (env[0] == '~') ? 1 : 0;
71 vecx = strtoul(env + off, NULL, 0);
73 OPENSSL_ia32cap_P[2] &= ~vecx;
75 OPENSSL_ia32cap_P[2] = vecx;
77 OPENSSL_ia32cap_P[2] = 0;
80 vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
84 * |(1<<10) sets a reserved bit to signal that variable
85 * was initialized already... This is to avoid interference
86 * with cpuid snippets in ELF .init segment.
88 OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10);
89 OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32);
92 unsigned int OPENSSL_ia32cap_P[4];
95 int OPENSSL_NONPIC_relocated = 0;
96 #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
97 void OPENSSL_cpuid_setup(void)
106 # if defined(_UNICODE) || defined(__UNICODE__)
107 # define _vsntprintf _vsnwprintf
109 # define _vsntprintf _vsnprintf
113 # define alloca _alloca
116 # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
117 int OPENSSL_isservice(void)
125 } _OPENSSL_isservice = {
129 if (_OPENSSL_isservice.p == NULL) {
130 HANDLE mod = GetModuleHandle(NULL);
134 f = GetProcAddress(mod, "_OPENSSL_isservice");
136 _OPENSSL_isservice.p = (void *)-1;
138 _OPENSSL_isservice.f = f;
141 if (_OPENSSL_isservice.p != (void *)-1)
142 return (*_OPENSSL_isservice.f) ();
144 h = GetProcessWindowStation();
148 if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) ||
149 GetLastError() != ERROR_INSUFFICIENT_BUFFER)
153 return -1; /* paranoia */
154 len++, len &= ~1; /* paranoia */
155 name = (WCHAR *)alloca(len + sizeof(WCHAR));
156 if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len))
159 len++, len &= ~1; /* paranoia */
160 name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */
163 * This doesn't cover "interactive" services [working with real
164 * WinSta0's] nor programs started non-interactively by Task Scheduler
165 * [those are working with SAWinSta].
167 if (wcsstr(name, L"Service-0x"))
170 /* This covers all non-interactive programs such as services. */
171 if (!wcsstr(name, L"WinSta0"))
178 int OPENSSL_isservice(void)
184 void OPENSSL_showfatal(const char *fmta, ...)
189 # ifdef STD_ERROR_HANDLE /* what a dirty trick! */
192 if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
193 GetFileType(h) != FILE_TYPE_UNKNOWN) {
194 /* must be console application */
199 len = _vsnprintf((char *)buf, sizeof(buf), fmta, ap);
200 WriteFile(h, buf, len < 0 ? sizeof(buf) : (DWORD) len, &out, NULL);
206 if (sizeof(TCHAR) == sizeof(char))
207 fmt = (const TCHAR *)fmta;
211 size_t len_0 = strlen(fmta) + 1, i;
214 fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
216 fmt = (const TCHAR *)L"no stack?";
219 if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0))
220 for (i = 0; i < len_0; i++)
221 fmtw[i] = (WCHAR)fmta[i];
222 for (i = 0; i < len_0; i++) {
226 switch (fmtw[i + 1]) {
258 fmt = (const TCHAR *)fmtw;
262 _vsntprintf(buf, OSSL_NELEM(buf) - 1, fmt, ap);
263 buf[OSSL_NELEM(buf) - 1] = _T('\0');
266 # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
267 /* this -------------v--- guards NT-specific calls */
268 if (check_winnt() && OPENSSL_isservice() > 0) {
269 HANDLE hEventLog = RegisterEventSource(NULL, _T("OpenSSL"));
271 if (hEventLog != NULL) {
272 const TCHAR *pmsg = buf;
274 if (!ReportEvent(hEventLog, EVENTLOG_ERROR_TYPE, 0, 0, NULL,
275 1, 0, &pmsg, NULL)) {
278 * We are in a situation where we tried to report a critical
279 * error and this failed for some reason. As a last resort,
280 * in debug builds, send output to the debugger or any other
281 * tool like DebugView which can monitor the output.
283 OutputDebugString(pmsg);
287 (void)DeregisterEventSource(hEventLog);
291 MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
294 void OPENSSL_showfatal(const char *fmta, ...)
296 #ifndef OPENSSL_NO_STDIO
300 vfprintf(stderr, fmta, ap);
305 int OPENSSL_isservice(void)
311 void OPENSSL_die(const char *message, const char *file, int line)
313 OPENSSL_showfatal("%s:%d: OpenSSL internal error: %s\n",
314 file, line, message);
319 * Win32 abort() customarily shows a dialog, but we just did that...
321 # if !defined(_WIN32_WCE)
328 #if !defined(OPENSSL_CPUID_OBJ)
329 /* volatile unsigned char* pointers are there because
330 * 1. Accessing a variable declared volatile via a pointer
331 * that lacks a volatile qualifier causes undefined behavior.
332 * 2. When the variable itself is not volatile the compiler is
333 * not required to keep all those reads and can convert
334 * this into canonical memcmp() which doesn't read the whole block.
335 * Pointers to volatile resolve the first problem fully. The second
336 * problem cannot be resolved in any Standard-compliant way but this
337 * works the problem around. Compilers typically react to
338 * pointers to volatile by preserving the reads and writes through them.
339 * The latter is not required by the Standard if the memory pointed to
341 * Pointers themselves are volatile in the function signature to work
342 * around a subtle bug in gcc 4.6+ which causes writes through
343 * pointers to volatile to not be emitted in some rare,
344 * never needed in real life, pieces of code.
346 int CRYPTO_memcmp(const volatile void * volatile in_a,
347 const volatile void * volatile in_b,
351 const volatile unsigned char *a = in_a;
352 const volatile unsigned char *b = in_b;
355 for (i = 0; i < len; i++)