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