platform_qual_test/nacl_cpuwhitelist.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * nacl_cpuwhitelist.c
  34  */
  35 #include "native_client/include/portability.h"
  36 #include <stdio.h>
  37 #include <string.h>
  38 #include <assert.h>
  39 #include <stdlib.h>
  40 #include "native_client/ncv/nacl_cpuid.h"
  41 #include "native_client/platform_qual_test/nacl_cpuwhitelist.h"
  42
  43 #if !defined(ARRAYSIZE)
  44 #define ARRAYSIZE(a) sizeof(a)/sizeof(a[0])
  45 #endif
  46
  47 static int idcmp(const void *s1, const void *s2) {
  48   return strncmp((char *)s1, *(char **)s2, kCPUIDStringLength);
  49 }
  50
  51
  52
  53 static const char* const kNaclCpuBlacklist[] = {
  54 /*          1         2        */
  55 /* 12345678901234567890 + '\0' */
  56   " FakeEntry0000000000",
  57   " FakeEntry0000000001",
  58   "zFakeEntry0000000000",
  59 };
  60
  61 static const char* const kNaclCpuWhitelist[] = {
  62 /*          1         2        */
  63 /* 12345678901234567890 + '\0' */
  64   " FakeEntry0000000000",
  65   " FakeEntry0000000001",
  66   " FakeEntry0000000002",
  67   " FakeEntry0000000003",
  68   " FakeEntry0000000004",
  69   " FakeEntry0000000005",
  70   "GenuineIntel00000f43",
  71   "zFakeEntry0000000000",
  72 };
  73
  74
  75
  76 static bool VerifyCpuList(const char* const cpulist[], int n) {
  77   int i;
  78   /* check lengths */
  79   for (i = 0; i < n; i++) {
  80     if (strlen(cpulist[i]) != kCPUIDStringLength - 1) {
  81       return 0;
  82     }
  83   }
  84
  85   /* check order */
  86   for (i = 1; i < n; i++) {
  87     if (strncmp(cpulist[i-1], cpulist[i], kCPUIDStringLength) >= 0) {
  88       return 0;
  89     }
  90   }
  91
  92   return 1;
  93 }
  94
  95
  96 bool NaCl_VerifyBlacklist() {
  97   return VerifyCpuList(kNaclCpuBlacklist, ARRAYSIZE(kNaclCpuBlacklist));
  98 }
  99
 100
 101 bool NaCl_VerifyWhitelist() {
 102   return VerifyCpuList(kNaclCpuWhitelist, ARRAYSIZE(kNaclCpuWhitelist));
 103 }
 104
 105
 106 static bool IsCpuInList(const char *myid, const char* const cpulist[], int n) {
 107   return (NULL != bsearch(myid, cpulist, n, sizeof(char*), idcmp));
 108 }
 109
 110
 111 /* for testing */
 112 bool NaCl_CPUIsWhitelisted(const char *myid) {
 113   return IsCpuInList(myid, kNaclCpuWhitelist, ARRAYSIZE(kNaclCpuWhitelist));
 114 }
 115
 116 /* for testing */
 117 bool NaCl_CPUIsBlacklisted(const char *myid) {
 118   return IsCpuInList(myid, kNaclCpuBlacklist, ARRAYSIZE(kNaclCpuBlacklist));
 119 }
 120
 121
 122 bool NaCl_ThisCPUIsWhitelisted() {
 123   const char* myid = GetCPUIDString();
 124   return IsCpuInList(myid, kNaclCpuWhitelist, ARRAYSIZE(kNaclCpuWhitelist));
 125 }
 126
 127 bool NaCl_ThisCPUIsBlacklisted() {
 128   const char* myid = GetCPUIDString();
 129   return IsCpuInList(myid, kNaclCpuBlacklist, ARRAYSIZE(kNaclCpuBlacklist));
 130 }