| /* |
| * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the OpenSSL license (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| /* ==================================================================== |
| * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. |
| * ECDH support in OpenSSL originally developed by |
| * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. |
| */ |
| |
| #include "internal/cryptlib_int.h" |
| #include <openssl/safestack.h> |
| |
| #if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \ |
| defined(__x86_64) || defined(__x86_64__) || \ |
| defined(_M_AMD64) || defined(_M_X64) |
| |
| extern unsigned int OPENSSL_ia32cap_P[4]; |
| |
| # if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY) |
| #include <stdio.h> |
| # define OPENSSL_CPUID_SETUP |
| typedef uint64_t IA32CAP; |
| void OPENSSL_cpuid_setup(void) |
| { |
| static int trigger = 0; |
| IA32CAP OPENSSL_ia32_cpuid(unsigned int *); |
| IA32CAP vec; |
| char *env; |
| |
| if (trigger) |
| return; |
| |
| trigger = 1; |
| if ((env = getenv("OPENSSL_ia32cap"))) { |
| int off = (env[0] == '~') ? 1 : 0; |
| # if defined(_WIN32) |
| if (!sscanf(env + off, "%I64i", &vec)) |
| vec = strtoul(env + off, NULL, 0); |
| # else |
| if (!sscanf(env + off, "%lli", (long long *)&vec)) |
| vec = strtoul(env + off, NULL, 0); |
| # endif |
| if (off) |
| vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~vec; |
| else if (env[0] == ':') |
| vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P); |
| |
| OPENSSL_ia32cap_P[2] = 0; |
| if ((env = strchr(env, ':'))) { |
| unsigned int vecx; |
| env++; |
| off = (env[0] == '~') ? 1 : 0; |
| vecx = strtoul(env + off, NULL, 0); |
| if (off) |
| OPENSSL_ia32cap_P[2] &= ~vecx; |
| else |
| OPENSSL_ia32cap_P[2] = vecx; |
| } |
| } else |
| vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P); |
| |
| /* |
| * |(1<<10) sets a reserved bit to signal that variable |
| * was initialized already... This is to avoid interference |
| * with cpuid snippets in ELF .init segment. |
| */ |
| OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10); |
| OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32); |
| } |
| # else |
| unsigned int OPENSSL_ia32cap_P[4]; |
| # endif |
| #endif |
| int OPENSSL_NONPIC_relocated = 0; |
| #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ) |
| void OPENSSL_cpuid_setup(void) |
| { |
| } |
| #endif |
| |
| #if defined(_WIN32) && !defined(__CYGWIN__) |
| # include <tchar.h> |
| # include <signal.h> |
| # ifdef __WATCOMC__ |
| # if defined(_UNICODE) || defined(__UNICODE__) |
| # define _vsntprintf _vsnwprintf |
| # else |
| # define _vsntprintf _vsnprintf |
| # endif |
| # endif |
| # ifdef _MSC_VER |
| # define alloca _alloca |
| # endif |
| |
| # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333 |
| int OPENSSL_isservice(void) |
| { |
| HWINSTA h; |
| DWORD len; |
| WCHAR *name; |
| static union { |
| void *p; |
| FARPROC f; |
| } _OPENSSL_isservice = { |
| NULL |
| }; |
| |
| if (_OPENSSL_isservice.p == NULL) { |
| HANDLE mod = GetModuleHandle(NULL); |
| if (mod != NULL) |
| _OPENSSL_isservice.f = GetProcAddress(mod, "_OPENSSL_isservice"); |
| if (_OPENSSL_isservice.p == NULL) |
| _OPENSSL_isservice.p = (void *)-1; |
| } |
| |
| if (_OPENSSL_isservice.p != (void *)-1) |
| return (*_OPENSSL_isservice.f) (); |
| |
| h = GetProcessWindowStation(); |
| if (h == NULL) |
| return -1; |
| |
| if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) || |
| GetLastError() != ERROR_INSUFFICIENT_BUFFER) |
| return -1; |
| |
| if (len > 512) |
| return -1; /* paranoia */ |
| len++, len &= ~1; /* paranoia */ |
| name = (WCHAR *)alloca(len + sizeof(WCHAR)); |
| if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len)) |
| return -1; |
| |
| len++, len &= ~1; /* paranoia */ |
| name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */ |
| # if 1 |
| /* |
| * This doesn't cover "interactive" services [working with real |
| * WinSta0's] nor programs started non-interactively by Task Scheduler |
| * [those are working with SAWinSta]. |
| */ |
| if (wcsstr(name, L"Service-0x")) |
| return 1; |
| # else |
| /* This covers all non-interactive programs such as services. */ |
| if (!wcsstr(name, L"WinSta0")) |
| return 1; |
| # endif |
| else |
| return 0; |
| } |
| # else |
| int OPENSSL_isservice(void) |
| { |
| return 0; |
| } |
| # endif |
| |
| void OPENSSL_showfatal(const char *fmta, ...) |
| { |
| va_list ap; |
| TCHAR buf[256]; |
| const TCHAR *fmt; |
| /* |
| * First check if it's a console application, in which case the |
| * error message would be printed to standard error. |
| * Windows CE does not have a concept of a console application, |
| * so we need to guard the check. |
| */ |
| # ifdef STD_ERROR_HANDLE |
| HANDLE h; |
| |
| if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL && |
| GetFileType(h) != FILE_TYPE_UNKNOWN) { |
| /* must be console application */ |
| int len; |
| DWORD out; |
| |
| va_start(ap, fmta); |
| len = _vsnprintf((char *)buf, sizeof(buf), fmta, ap); |
| WriteFile(h, buf, len < 0 ? sizeof(buf) : (DWORD) len, &out, NULL); |
| va_end(ap); |
| return; |
| } |
| # endif |
| |
| if (sizeof(TCHAR) == sizeof(char)) |
| fmt = (const TCHAR *)fmta; |
| else |
| do { |
| int keepgoing; |
| size_t len_0 = strlen(fmta) + 1, i; |
| WCHAR *fmtw; |
| |
| fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR)); |
| if (fmtw == NULL) { |
| fmt = (const TCHAR *)L"no stack?"; |
| break; |
| } |
| if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0)) |
| for (i = 0; i < len_0; i++) |
| fmtw[i] = (WCHAR)fmta[i]; |
| for (i = 0; i < len_0; i++) { |
| if (fmtw[i] == L'%') |
| do { |
| keepgoing = 0; |
| switch (fmtw[i + 1]) { |
| case L'0': |
| case L'1': |
| case L'2': |
| case L'3': |
| case L'4': |
| case L'5': |
| case L'6': |
| case L'7': |
| case L'8': |
| case L'9': |
| case L'.': |
| case L'*': |
| case L'-': |
| i++; |
| keepgoing = 1; |
| break; |
| case L's': |
| fmtw[i + 1] = L'S'; |
| break; |
| case L'S': |
| fmtw[i + 1] = L's'; |
| break; |
| case L'c': |
| fmtw[i + 1] = L'C'; |
| break; |
| case L'C': |
| fmtw[i + 1] = L'c'; |
| break; |
| } |
| } while (keepgoing); |
| } |
| fmt = (const TCHAR *)fmtw; |
| } while (0); |
| |
| va_start(ap, fmta); |
| _vsntprintf(buf, OSSL_NELEM(buf) - 1, fmt, ap); |
| buf[OSSL_NELEM(buf) - 1] = _T('\0'); |
| va_end(ap); |
| |
| # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333 |
| /* this -------------v--- guards NT-specific calls */ |
| if (check_winnt() && OPENSSL_isservice() > 0) { |
| HANDLE hEventLog = RegisterEventSource(NULL, _T("OpenSSL")); |
| |
| if (hEventLog != NULL) { |
| const TCHAR *pmsg = buf; |
| |
| if (!ReportEvent(hEventLog, EVENTLOG_ERROR_TYPE, 0, 0, NULL, |
| 1, 0, &pmsg, NULL)) { |
| #if defined(DEBUG) |
| /* |
| * We are in a situation where we tried to report a critical |
| * error and this failed for some reason. As a last resort, |
| * in debug builds, send output to the debugger or any other |
| * tool like DebugView which can monitor the output. |
| */ |
| OutputDebugString(pmsg); |
| #endif |
| } |
| |
| (void)DeregisterEventSource(hEventLog); |
| } |
| } else |
| # endif |
| MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR); |
| } |
| #else |
| void OPENSSL_showfatal(const char *fmta, ...) |
| { |
| #ifndef OPENSSL_NO_STDIO |
| va_list ap; |
| |
| va_start(ap, fmta); |
| vfprintf(stderr, fmta, ap); |
| va_end(ap); |
| #endif |
| } |
| |
| int OPENSSL_isservice(void) |
| { |
| return 0; |
| } |
| #endif |
| |
| void OPENSSL_die(const char *message, const char *file, int line) |
| { |
| OPENSSL_showfatal("%s:%d: OpenSSL internal error: %s\n", |
| file, line, message); |
| #if !defined(_WIN32) || defined(__CYGWIN__) |
| abort(); |
| #else |
| /* |
| * Win32 abort() customarily shows a dialog, but we just did that... |
| */ |
| # if !defined(_WIN32_WCE) |
| raise(SIGABRT); |
| # endif |
| _exit(3); |
| #endif |
| } |
| |
| #if !defined(OPENSSL_CPUID_OBJ) |
| /* volatile unsigned char* pointers are there because |
| * 1. Accessing a variable declared volatile via a pointer |
| * that lacks a volatile qualifier causes undefined behavior. |
| * 2. When the variable itself is not volatile the compiler is |
| * not required to keep all those reads and can convert |
| * this into canonical memcmp() which doesn't read the whole block. |
| * Pointers to volatile resolve the first problem fully. The second |
| * problem cannot be resolved in any Standard-compliant way but this |
| * works the problem around. Compilers typically react to |
| * pointers to volatile by preserving the reads and writes through them. |
| * The latter is not required by the Standard if the memory pointed to |
| * is not volatile. |
| * Pointers themselves are volatile in the function signature to work |
| * around a subtle bug in gcc 4.6+ which causes writes through |
| * pointers to volatile to not be emitted in some rare, |
| * never needed in real life, pieces of code. |
| */ |
| int CRYPTO_memcmp(const volatile void * volatile in_a, |
| const volatile void * volatile in_b, |
| size_t len) |
| { |
| size_t i; |
| const volatile unsigned char *a = in_a; |
| const volatile unsigned char *b = in_b; |
| unsigned char x = 0; |
| |
| for (i = 0; i < len; i++) |
| x |= a[i] ^ b[i]; |
| |
| return x; |
| } |
| #endif |
