474 lines
13 KiB
C
474 lines
13 KiB
C
/*
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* Copyright 1998-2019 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2002, Oracle and/or its affiliates. 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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#include "e_os.h"
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#include "crypto/cryptlib.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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/*
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* Purpose of these minimalistic and character-type-agnostic subroutines
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* is to break dependency on MSVCRT (on Windows) and locale. This makes
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* OPENSSL_cpuid_setup safe to use as "constructor". "Character-type-
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* agnostic" means that they work with either wide or 8-bit characters,
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* exploiting the fact that first 127 characters can be simply casted
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* between the sets, while the rest would be simply rejected by ossl_is*
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* subroutines.
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*/
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# ifdef _WIN32
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typedef WCHAR variant_char;
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static variant_char *ossl_getenv(const char *name)
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{
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/*
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* Since we pull only one environment variable, it's simpler to
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* to just ignore |name| and use equivalent wide-char L-literal.
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* As well as to ignore excessively long values...
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*/
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static WCHAR value[48];
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DWORD len = GetEnvironmentVariableW(L"OPENSSL_ia32cap", value, 48);
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return (len > 0 && len < 48) ? value : NULL;
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}
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# else
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typedef char variant_char;
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# define ossl_getenv getenv
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# endif
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# include "crypto/ctype.h"
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static int todigit(variant_char c)
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{
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if (ossl_isdigit(c))
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return c - '0';
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else if (ossl_isxdigit(c))
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return ossl_tolower(c) - 'a' + 10;
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/* return largest base value to make caller terminate the loop */
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return 16;
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}
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static uint64_t ossl_strtouint64(const variant_char *str)
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{
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uint64_t ret = 0;
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unsigned int digit, base = 10;
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if (*str == '0') {
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base = 8, str++;
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if (ossl_tolower(*str) == 'x')
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base = 16, str++;
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}
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while((digit = todigit(*str++)) < base)
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ret = ret * base + digit;
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return ret;
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}
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static variant_char *ossl_strchr(const variant_char *str, char srch)
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{ variant_char c;
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while((c = *str)) {
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if (c == srch)
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return (variant_char *)str;
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str++;
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}
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return NULL;
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}
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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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const variant_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 = ossl_getenv("OPENSSL_ia32cap")) != NULL) {
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int off = (env[0] == '~') ? 1 : 0;
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vec = ossl_strtouint64(env + off);
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if (off) {
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IA32CAP mask = vec;
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vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~mask;
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if (mask & (1<<24)) {
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/*
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* User disables FXSR bit, mask even other capabilities
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* that operate exclusively on XMM, so we don't have to
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* double-check all the time. We mask PCLMULQDQ, AMD XOP,
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* AES-NI and AVX. Formally speaking we don't have to
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* do it in x86_64 case, but we can safely assume that
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* x86_64 users won't actually flip this flag.
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*/
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vec &= ~((IA32CAP)(1<<1|1<<11|1<<25|1<<28) << 32);
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}
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} else if (env[0] == ':') {
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vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
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}
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if ((env = ossl_strchr(env, ':')) != NULL) {
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IA32CAP vecx;
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env++;
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off = (env[0] == '~') ? 1 : 0;
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vecx = ossl_strtouint64(env + off);
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if (off) {
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OPENSSL_ia32cap_P[2] &= ~(unsigned int)vecx;
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OPENSSL_ia32cap_P[3] &= ~(unsigned int)(vecx >> 32);
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} else {
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OPENSSL_ia32cap_P[2] = (unsigned int)vecx;
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OPENSSL_ia32cap_P[3] = (unsigned int)(vecx >> 32);
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}
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} else {
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OPENSSL_ia32cap_P[2] = 0;
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OPENSSL_ia32cap_P[3] = 0;
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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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/*
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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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#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)
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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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# ifdef OPENSSL_SYS_WIN_CORE
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int OPENSSL_isservice(void)
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{
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/* OneCore API cannot interact with GUI */
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return 1;
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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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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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FARPROC f = NULL;
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if (mod != NULL)
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f = GetProcAddress(mod, "_OPENSSL_isservice");
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if (f == NULL)
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_OPENSSL_isservice.p = (void *)-1;
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else
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_OPENSSL_isservice.f = f;
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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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# endif
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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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/*
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* First check if it's a console application, in which case the
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* error message would be printed to standard error.
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* Windows CE does not have a concept of a console application,
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* so we need to guard the check.
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*/
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# ifdef STD_ERROR_HANDLE
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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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# ifdef OPENSSL_SYS_WIN_CORE
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/* ONECORE is always NONGUI and NT >= 0x0601 */
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/*
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* TODO: (For non GUI and no std error cases)
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* Add event logging feature here.
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*/
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# if !defined(NDEBUG)
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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(buf);
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# endif
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# else
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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(NDEBUG)
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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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MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
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}
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# endif
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# else
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MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
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# endif
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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)
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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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/*
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* The volatile is used to to ensure that the compiler generates code that reads
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* all values from the array and doesn't try to optimize this away. The standard
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* doesn't actually require this behavior if the original data pointed to is
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* not volatile, but compilers do this in practice anyway.
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*
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* There are also assembler versions of this function.
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*/
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# undef CRYPTO_memcmp
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int CRYPTO_memcmp(const void * in_a, const void * in_b, 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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/*
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* For systems that don't provide an instruction counter register or equivalent.
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*/
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uint32_t OPENSSL_rdtsc(void)
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{
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return 0;
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}
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size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
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{
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return 0;
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}
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size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
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{
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return 0;
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}
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#endif
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