| 1 | /*
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| 2 | * Copyright 1998-2019 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved
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| 4 | *
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| 5 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 6 | * this file except in compliance with the License. You can obtain a copy
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| 7 | * in the file LICENSE in the source distribution or at
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| 8 | * https://www.openssl.org/source/license.html
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| 9 | */
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| 10 |
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| 11 | #include "e_os.h"
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| 12 | #include "crypto/cryptlib.h"
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| 13 | #include <openssl/safestack.h>
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| 14 |
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| 15 | #if defined(__i386) || defined(__i386__) || defined(_M_IX86) || \
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| 16 | defined(__x86_64) || defined(__x86_64__) || \
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| 17 | defined(_M_AMD64) || defined(_M_X64)
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| 18 |
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| 19 | extern unsigned int OPENSSL_ia32cap_P[4];
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| 20 |
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| 21 | # if defined(OPENSSL_CPUID_OBJ) && !defined(OPENSSL_NO_ASM) && !defined(I386_ONLY)
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| 22 |
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| 23 | /*
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| 24 | * Purpose of these minimalistic and character-type-agnostic subroutines
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| 25 | * is to break dependency on MSVCRT (on Windows) and locale. This makes
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| 26 | * OPENSSL_cpuid_setup safe to use as "constructor". "Character-type-
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| 27 | * agnostic" means that they work with either wide or 8-bit characters,
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| 28 | * exploiting the fact that first 127 characters can be simply casted
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| 29 | * between the sets, while the rest would be simply rejected by ossl_is*
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| 30 | * subroutines.
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| 31 | */
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| 32 | # ifdef _WIN32
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| 33 | typedef WCHAR variant_char;
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| 34 |
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| 35 | static variant_char *ossl_getenv(const char *name)
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| 36 | {
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| 37 | /*
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| 38 | * Since we pull only one environment variable, it's simpler to
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| 39 | * to just ignore |name| and use equivalent wide-char L-literal.
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| 40 | * As well as to ignore excessively long values...
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| 41 | */
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| 42 | static WCHAR value[48];
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| 43 | DWORD len = GetEnvironmentVariableW(L"OPENSSL_ia32cap", value, 48);
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| 44 |
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| 45 | return (len > 0 && len < 48) ? value : NULL;
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| 46 | }
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| 47 | # else
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| 48 | typedef char variant_char;
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| 49 | # define ossl_getenv getenv
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| 50 | # endif
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| 51 |
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| 52 | # include "crypto/ctype.h"
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| 53 |
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| 54 | static int todigit(variant_char c)
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| 55 | {
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| 56 | if (ossl_isdigit(c))
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| 57 | return c - '0';
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| 58 | else if (ossl_isxdigit(c))
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| 59 | return ossl_tolower(c) - 'a' + 10;
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| 60 |
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| 61 | /* return largest base value to make caller terminate the loop */
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| 62 | return 16;
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| 63 | }
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| 64 |
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| 65 | static uint64_t ossl_strtouint64(const variant_char *str)
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| 66 | {
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| 67 | uint64_t ret = 0;
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| 68 | unsigned int digit, base = 10;
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| 69 |
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| 70 | if (*str == '0') {
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| 71 | base = 8, str++;
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| 72 | if (ossl_tolower(*str) == 'x')
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| 73 | base = 16, str++;
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| 74 | }
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| 75 |
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| 76 | while((digit = todigit(*str++)) < base)
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| 77 | ret = ret * base + digit;
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| 78 |
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| 79 | return ret;
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| 80 | }
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| 81 |
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| 82 | static variant_char *ossl_strchr(const variant_char *str, char srch)
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| 83 | { variant_char c;
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| 84 |
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| 85 | while((c = *str)) {
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| 86 | if (c == srch)
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| 87 | return (variant_char *)str;
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| 88 | str++;
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| 89 | }
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| 90 |
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| 91 | return NULL;
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| 92 | }
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| 93 |
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| 94 | # define OPENSSL_CPUID_SETUP
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| 95 | typedef uint64_t IA32CAP;
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| 96 |
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| 97 | void OPENSSL_cpuid_setup(void)
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| 98 | {
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| 99 | static int trigger = 0;
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| 100 | IA32CAP OPENSSL_ia32_cpuid(unsigned int *);
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| 101 | IA32CAP vec;
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| 102 | const variant_char *env;
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| 103 |
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| 104 | if (trigger)
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| 105 | return;
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| 106 |
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| 107 | trigger = 1;
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| 108 | if ((env = ossl_getenv("OPENSSL_ia32cap")) != NULL) {
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| 109 | int off = (env[0] == '~') ? 1 : 0;
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| 110 |
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| 111 | vec = ossl_strtouint64(env + off);
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| 112 |
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| 113 | if (off) {
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| 114 | IA32CAP mask = vec;
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| 115 | vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P) & ~mask;
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| 116 | if (mask & (1<<24)) {
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| 117 | /*
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| 118 | * User disables FXSR bit, mask even other capabilities
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| 119 | * that operate exclusively on XMM, so we don't have to
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| 120 | * double-check all the time. We mask PCLMULQDQ, AMD XOP,
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| 121 | * AES-NI and AVX. Formally speaking we don't have to
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| 122 | * do it in x86_64 case, but we can safely assume that
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| 123 | * x86_64 users won't actually flip this flag.
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| 124 | */
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| 125 | vec &= ~((IA32CAP)(1<<1|1<<11|1<<25|1<<28) << 32);
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| 126 | }
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| 127 | } else if (env[0] == ':') {
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| 128 | vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
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| 129 | }
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| 130 |
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| 131 | if ((env = ossl_strchr(env, ':')) != NULL) {
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| 132 | IA32CAP vecx;
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| 133 |
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| 134 | env++;
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| 135 | off = (env[0] == '~') ? 1 : 0;
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| 136 | vecx = ossl_strtouint64(env + off);
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| 137 | if (off) {
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| 138 | OPENSSL_ia32cap_P[2] &= ~(unsigned int)vecx;
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| 139 | OPENSSL_ia32cap_P[3] &= ~(unsigned int)(vecx >> 32);
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| 140 | } else {
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| 141 | OPENSSL_ia32cap_P[2] = (unsigned int)vecx;
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| 142 | OPENSSL_ia32cap_P[3] = (unsigned int)(vecx >> 32);
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| 143 | }
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| 144 | } else {
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| 145 | OPENSSL_ia32cap_P[2] = 0;
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| 146 | OPENSSL_ia32cap_P[3] = 0;
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| 147 | }
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| 148 | } else {
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| 149 | vec = OPENSSL_ia32_cpuid(OPENSSL_ia32cap_P);
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| 150 | }
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| 151 |
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| 152 | /*
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| 153 | * |(1<<10) sets a reserved bit to signal that variable
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| 154 | * was initialized already... This is to avoid interference
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| 155 | * with cpuid snippets in ELF .init segment.
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| 156 | */
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| 157 | OPENSSL_ia32cap_P[0] = (unsigned int)vec | (1 << 10);
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| 158 | OPENSSL_ia32cap_P[1] = (unsigned int)(vec >> 32);
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| 159 | }
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| 160 | # else
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| 161 | unsigned int OPENSSL_ia32cap_P[4];
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| 162 | # endif
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| 163 | #endif
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| 164 | #if !defined(OPENSSL_CPUID_SETUP) && !defined(OPENSSL_CPUID_OBJ)
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| 165 | void OPENSSL_cpuid_setup(void)
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| 166 | {
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| 167 | }
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| 168 | #endif
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| 169 |
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| 170 | #if defined(_WIN32)
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| 171 | # include <tchar.h>
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| 172 | # include <signal.h>
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| 173 | # ifdef __WATCOMC__
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| 174 | # if defined(_UNICODE) || defined(__UNICODE__)
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| 175 | # define _vsntprintf _vsnwprintf
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| 176 | # else
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| 177 | # define _vsntprintf _vsnprintf
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| 178 | # endif
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| 179 | # endif
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| 180 | # ifdef _MSC_VER
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| 181 | # define alloca _alloca
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| 182 | # endif
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| 183 |
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| 184 | # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
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| 185 | # ifdef OPENSSL_SYS_WIN_CORE
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| 186 |
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| 187 | int OPENSSL_isservice(void)
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| 188 | {
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| 189 | /* OneCore API cannot interact with GUI */
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| 190 | return 1;
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| 191 | }
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| 192 | # else
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| 193 | int OPENSSL_isservice(void)
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| 194 | {
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| 195 | HWINSTA h;
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| 196 | DWORD len;
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| 197 | WCHAR *name;
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| 198 | static union {
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| 199 | void *p;
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| 200 | FARPROC f;
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| 201 | } _OPENSSL_isservice = {
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| 202 | NULL
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| 203 | };
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| 204 |
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| 205 | if (_OPENSSL_isservice.p == NULL) {
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| 206 | HANDLE mod = GetModuleHandle(NULL);
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| 207 | FARPROC f = NULL;
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| 208 |
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| 209 | if (mod != NULL)
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| 210 | f = GetProcAddress(mod, "_OPENSSL_isservice");
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| 211 | if (f == NULL)
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| 212 | _OPENSSL_isservice.p = (void *)-1;
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| 213 | else
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| 214 | _OPENSSL_isservice.f = f;
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| 215 | }
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| 216 |
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| 217 | if (_OPENSSL_isservice.p != (void *)-1)
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| 218 | return (*_OPENSSL_isservice.f) ();
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| 219 |
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| 220 | h = GetProcessWindowStation();
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| 221 | if (h == NULL)
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| 222 | return -1;
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| 223 |
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| 224 | if (GetUserObjectInformationW(h, UOI_NAME, NULL, 0, &len) ||
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| 225 | GetLastError() != ERROR_INSUFFICIENT_BUFFER)
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| 226 | return -1;
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| 227 |
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| 228 | if (len > 512)
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| 229 | return -1; /* paranoia */
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| 230 | len++, len &= ~1; /* paranoia */
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| 231 | name = (WCHAR *)alloca(len + sizeof(WCHAR));
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| 232 | if (!GetUserObjectInformationW(h, UOI_NAME, name, len, &len))
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| 233 | return -1;
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| 234 |
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| 235 | len++, len &= ~1; /* paranoia */
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| 236 | name[len / sizeof(WCHAR)] = L'\0'; /* paranoia */
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| 237 | # if 1
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| 238 | /*
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| 239 | * This doesn't cover "interactive" services [working with real
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| 240 | * WinSta0's] nor programs started non-interactively by Task Scheduler
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| 241 | * [those are working with SAWinSta].
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| 242 | */
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| 243 | if (wcsstr(name, L"Service-0x"))
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| 244 | return 1;
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| 245 | # else
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| 246 | /* This covers all non-interactive programs such as services. */
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| 247 | if (!wcsstr(name, L"WinSta0"))
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| 248 | return 1;
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| 249 | # endif
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| 250 | else
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| 251 | return 0;
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| 252 | }
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| 253 | # endif
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| 254 | # else
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| 255 | int OPENSSL_isservice(void)
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| 256 | {
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| 257 | return 0;
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| 258 | }
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| 259 | # endif
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| 260 |
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| 261 | void OPENSSL_showfatal(const char *fmta, ...)
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| 262 | {
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| 263 | va_list ap;
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| 264 | TCHAR buf[256];
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| 265 | const TCHAR *fmt;
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| 266 | /*
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| 267 | * First check if it's a console application, in which case the
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| 268 | * error message would be printed to standard error.
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| 269 | * Windows CE does not have a concept of a console application,
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| 270 | * so we need to guard the check.
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| 271 | */
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| 272 | # ifdef STD_ERROR_HANDLE
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| 273 | HANDLE h;
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| 274 |
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| 275 | if ((h = GetStdHandle(STD_ERROR_HANDLE)) != NULL &&
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| 276 | GetFileType(h) != FILE_TYPE_UNKNOWN) {
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| 277 | /* must be console application */
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| 278 | int len;
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| 279 | DWORD out;
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| 280 |
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| 281 | va_start(ap, fmta);
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| 282 | len = _vsnprintf((char *)buf, sizeof(buf), fmta, ap);
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| 283 | WriteFile(h, buf, len < 0 ? sizeof(buf) : (DWORD) len, &out, NULL);
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| 284 | va_end(ap);
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| 285 | return;
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| 286 | }
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| 287 | # endif
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| 288 |
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| 289 | if (sizeof(TCHAR) == sizeof(char))
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| 290 | fmt = (const TCHAR *)fmta;
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| 291 | else
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| 292 | do {
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| 293 | int keepgoing;
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| 294 | size_t len_0 = strlen(fmta) + 1, i;
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| 295 | WCHAR *fmtw;
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| 296 |
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| 297 | fmtw = (WCHAR *)alloca(len_0 * sizeof(WCHAR));
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| 298 | if (fmtw == NULL) {
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| 299 | fmt = (const TCHAR *)L"no stack?";
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| 300 | break;
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| 301 | }
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| 302 | if (!MultiByteToWideChar(CP_ACP, 0, fmta, len_0, fmtw, len_0))
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| 303 | for (i = 0; i < len_0; i++)
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| 304 | fmtw[i] = (WCHAR)fmta[i];
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| 305 | for (i = 0; i < len_0; i++) {
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| 306 | if (fmtw[i] == L'%')
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| 307 | do {
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| 308 | keepgoing = 0;
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| 309 | switch (fmtw[i + 1]) {
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| 310 | case L'0':
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| 311 | case L'1':
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| 312 | case L'2':
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| 313 | case L'3':
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| 314 | case L'4':
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| 315 | case L'5':
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| 316 | case L'6':
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| 317 | case L'7':
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| 318 | case L'8':
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| 319 | case L'9':
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| 320 | case L'.':
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| 321 | case L'*':
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| 322 | case L'-':
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| 323 | i++;
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| 324 | keepgoing = 1;
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| 325 | break;
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| 326 | case L's':
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| 327 | fmtw[i + 1] = L'S';
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| 328 | break;
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| 329 | case L'S':
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| 330 | fmtw[i + 1] = L's';
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| 331 | break;
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| 332 | case L'c':
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| 333 | fmtw[i + 1] = L'C';
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| 334 | break;
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| 335 | case L'C':
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| 336 | fmtw[i + 1] = L'c';
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| 337 | break;
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| 338 | }
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| 339 | } while (keepgoing);
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| 340 | }
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| 341 | fmt = (const TCHAR *)fmtw;
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| 342 | } while (0);
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| 343 |
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| 344 | va_start(ap, fmta);
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| 345 | _vsntprintf(buf, OSSL_NELEM(buf) - 1, fmt, ap);
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| 346 | buf[OSSL_NELEM(buf) - 1] = _T('\0');
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| 347 | va_end(ap);
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| 348 |
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| 349 | # if defined(_WIN32_WINNT) && _WIN32_WINNT>=0x0333
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| 350 | # ifdef OPENSSL_SYS_WIN_CORE
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| 351 | /* ONECORE is always NONGUI and NT >= 0x0601 */
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| 352 |
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| 353 | /*
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| 354 | * TODO: (For non GUI and no std error cases)
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| 355 | * Add event logging feature here.
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| 356 | */
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| 357 |
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| 358 | # if !defined(NDEBUG)
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| 359 | /*
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| 360 | * We are in a situation where we tried to report a critical
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| 361 | * error and this failed for some reason. As a last resort,
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| 362 | * in debug builds, send output to the debugger or any other
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| 363 | * tool like DebugView which can monitor the output.
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| 364 | */
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| 365 | OutputDebugString(buf);
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| 366 | # endif
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| 367 | # else
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| 368 | /* this -------------v--- guards NT-specific calls */
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| 369 | if (check_winnt() && OPENSSL_isservice() > 0) {
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| 370 | HANDLE hEventLog = RegisterEventSource(NULL, _T("OpenSSL"));
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| 371 |
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| 372 | if (hEventLog != NULL) {
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| 373 | const TCHAR *pmsg = buf;
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| 374 |
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| 375 | if (!ReportEvent(hEventLog, EVENTLOG_ERROR_TYPE, 0, 0, NULL,
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| 376 | 1, 0, &pmsg, NULL)) {
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| 377 | # if !defined(NDEBUG)
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| 378 | /*
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| 379 | * We are in a situation where we tried to report a critical
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| 380 | * error and this failed for some reason. As a last resort,
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| 381 | * in debug builds, send output to the debugger or any other
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| 382 | * tool like DebugView which can monitor the output.
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| 383 | */
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| 384 | OutputDebugString(pmsg);
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| 385 | # endif
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| 386 | }
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| 387 |
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| 388 | (void)DeregisterEventSource(hEventLog);
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| 389 | }
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| 390 | } else {
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| 391 | MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
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| 392 | }
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| 393 | # endif
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| 394 | # else
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| 395 | MessageBox(NULL, buf, _T("OpenSSL: FATAL"), MB_OK | MB_ICONERROR);
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| 396 | # endif
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| 397 | }
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| 398 | #else
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| 399 | void OPENSSL_showfatal(const char *fmta, ...)
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| 400 | {
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| 401 | #ifndef OPENSSL_NO_STDIO
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| 402 | va_list ap;
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| 403 |
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| 404 | va_start(ap, fmta);
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| 405 | vfprintf(stderr, fmta, ap);
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| 406 | va_end(ap);
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| 407 | #endif
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| 408 | }
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| 409 |
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| 410 | int OPENSSL_isservice(void)
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| 411 | {
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| 412 | return 0;
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| 413 | }
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| 414 | #endif
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| 415 |
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| 416 | void OPENSSL_die(const char *message, const char *file, int line)
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| 417 | {
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| 418 | OPENSSL_showfatal("%s:%d: OpenSSL internal error: %s\n",
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| 419 | file, line, message);
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| 420 | #if !defined(_WIN32)
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| 421 | abort();
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| 422 | #else
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| 423 | /*
|
|---|
| 424 | * Win32 abort() customarily shows a dialog, but we just did that...
|
|---|
| 425 | */
|
|---|
| 426 | # if !defined(_WIN32_WCE)
|
|---|
| 427 | raise(SIGABRT);
|
|---|
| 428 | # endif
|
|---|
| 429 | _exit(3);
|
|---|
| 430 | #endif
|
|---|
| 431 | }
|
|---|
| 432 |
|
|---|
| 433 | #if !defined(OPENSSL_CPUID_OBJ)
|
|---|
| 434 | /*
|
|---|
| 435 | * The volatile is used to to ensure that the compiler generates code that reads
|
|---|
| 436 | * all values from the array and doesn't try to optimize this away. The standard
|
|---|
| 437 | * doesn't actually require this behavior if the original data pointed to is
|
|---|
| 438 | * not volatile, but compilers do this in practice anyway.
|
|---|
| 439 | *
|
|---|
| 440 | * There are also assembler versions of this function.
|
|---|
| 441 | */
|
|---|
| 442 | # ifndef VBOX /* Don't undo the mangling, please. */
|
|---|
| 443 | # undef CRYPTO_memcmp
|
|---|
| 444 | # endif /* VBOX */
|
|---|
| 445 | int CRYPTO_memcmp(const void * in_a, const void * in_b, size_t len)
|
|---|
| 446 | {
|
|---|
| 447 | size_t i;
|
|---|
| 448 | const volatile unsigned char *a = in_a;
|
|---|
| 449 | const volatile unsigned char *b = in_b;
|
|---|
| 450 | unsigned char x = 0;
|
|---|
| 451 |
|
|---|
| 452 | for (i = 0; i < len; i++)
|
|---|
| 453 | x |= a[i] ^ b[i];
|
|---|
| 454 |
|
|---|
| 455 | return x;
|
|---|
| 456 | }
|
|---|
| 457 |
|
|---|
| 458 | /*
|
|---|
| 459 | * For systems that don't provide an instruction counter register or equivalent.
|
|---|
| 460 | */
|
|---|
| 461 | uint32_t OPENSSL_rdtsc(void)
|
|---|
| 462 | {
|
|---|
| 463 | return 0;
|
|---|
| 464 | }
|
|---|
| 465 |
|
|---|
| 466 | size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
|
|---|
| 467 | {
|
|---|
| 468 | return 0;
|
|---|
| 469 | }
|
|---|
| 470 |
|
|---|
| 471 | size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
|
|---|
| 472 | {
|
|---|
| 473 | return 0;
|
|---|
| 474 | }
|
|---|
| 475 | #endif
|
|---|
