Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/freebl/win_rand.c @ 0:1e5118fa0cb1

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This is NSS with a Cmake Buildsyste To compile a static NSS library for Windows we've used the Chromium-NSS fork and added a Cmake buildsystem to compile it statically for Windows. See README.chromium for chromium changes and README.trustbridge for our modifications.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 28 Jul 2014 10:47:06 +0200
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rev   line source
0
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
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1 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 #include "secrng.h"
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6
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7 #ifdef XP_WIN
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8 #include <windows.h>
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9 #include <time.h>
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10
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11 static BOOL
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12 CurrentClockTickTime(LPDWORD lpdwHigh, LPDWORD lpdwLow)
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13 {
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14 LARGE_INTEGER liCount;
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15
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16 if (!QueryPerformanceCounter(&liCount))
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17 return FALSE;
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18
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19 *lpdwHigh = liCount.u.HighPart;
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20 *lpdwLow = liCount.u.LowPart;
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21 return TRUE;
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22 }
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23
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24 size_t RNG_GetNoise(void *buf, size_t maxbuf)
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25 {
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26 DWORD dwHigh, dwLow, dwVal;
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27 int n = 0;
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28 int nBytes;
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29 time_t sTime;
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30
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31 if (maxbuf <= 0)
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32 return 0;
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33
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34 CurrentClockTickTime(&dwHigh, &dwLow);
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35
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36 // get the maximally changing bits first
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37 nBytes = sizeof(dwLow) > maxbuf ? maxbuf : sizeof(dwLow);
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38 memcpy((char *)buf, &dwLow, nBytes);
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39 n += nBytes;
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40 maxbuf -= nBytes;
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41
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42 if (maxbuf <= 0)
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43 return n;
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44
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45 nBytes = sizeof(dwHigh) > maxbuf ? maxbuf : sizeof(dwHigh);
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46 memcpy(((char *)buf) + n, &dwHigh, nBytes);
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47 n += nBytes;
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48 maxbuf -= nBytes;
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49
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50 if (maxbuf <= 0)
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51 return n;
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52
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53 // get the number of milliseconds that have elapsed since Windows started
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54 dwVal = GetTickCount();
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55
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56 nBytes = sizeof(dwVal) > maxbuf ? maxbuf : sizeof(dwVal);
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57 memcpy(((char *)buf) + n, &dwVal, nBytes);
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58 n += nBytes;
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59 maxbuf -= nBytes;
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60
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61 if (maxbuf <= 0)
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62 return n;
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63
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64 // get the time in seconds since midnight Jan 1, 1970
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65 time(&sTime);
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66 nBytes = sizeof(sTime) > maxbuf ? maxbuf : sizeof(sTime);
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67 memcpy(((char *)buf) + n, &sTime, nBytes);
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68 n += nBytes;
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69
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70 return n;
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71 }
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72
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73 void RNG_SystemInfoForRNG(void)
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74 {
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75 DWORD dwVal;
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76 char buffer[256];
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77 int nBytes;
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78 MEMORYSTATUS sMem;
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79 HANDLE hVal;
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80 DWORD dwSerialNum;
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81 DWORD dwComponentLen;
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82 DWORD dwSysFlags;
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83 char volName[128];
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84 DWORD dwSectors, dwBytes, dwFreeClusters, dwNumClusters;
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85
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86 nBytes = RNG_GetNoise(buffer, 20); // get up to 20 bytes
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87 RNG_RandomUpdate(buffer, nBytes);
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88
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89 sMem.dwLength = sizeof(sMem);
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90 GlobalMemoryStatus(&sMem); // assorted memory stats
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91 RNG_RandomUpdate(&sMem, sizeof(sMem));
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92
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93 dwVal = GetLogicalDrives();
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94 RNG_RandomUpdate(&dwVal, sizeof(dwVal)); // bitfields in bits 0-25
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95
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96 dwVal = sizeof(buffer);
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97 if (GetComputerName(buffer, &dwVal))
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98 RNG_RandomUpdate(buffer, dwVal);
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99
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100 hVal = GetCurrentProcess(); // 4 or 8 byte pseudo handle (a
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101 // constant!) of current process
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102 RNG_RandomUpdate(&hVal, sizeof(hVal));
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103
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104 dwVal = GetCurrentProcessId(); // process ID (4 bytes)
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105 RNG_RandomUpdate(&dwVal, sizeof(dwVal));
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106
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107 dwVal = GetCurrentThreadId(); // thread ID (4 bytes)
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108 RNG_RandomUpdate(&dwVal, sizeof(dwVal));
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109
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110 volName[0] = '\0';
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111 buffer[0] = '\0';
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112 GetVolumeInformation(NULL,
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113 volName,
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114 sizeof(volName),
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115 &dwSerialNum,
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116 &dwComponentLen,
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117 &dwSysFlags,
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118 buffer,
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119 sizeof(buffer));
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120
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121 RNG_RandomUpdate(volName, strlen(volName));
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122 RNG_RandomUpdate(&dwSerialNum, sizeof(dwSerialNum));
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123 RNG_RandomUpdate(&dwComponentLen, sizeof(dwComponentLen));
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124 RNG_RandomUpdate(&dwSysFlags, sizeof(dwSysFlags));
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125 RNG_RandomUpdate(buffer, strlen(buffer));
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126
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127 if (GetDiskFreeSpace(NULL, &dwSectors, &dwBytes, &dwFreeClusters,
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128 &dwNumClusters)) {
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129 RNG_RandomUpdate(&dwSectors, sizeof(dwSectors));
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130 RNG_RandomUpdate(&dwBytes, sizeof(dwBytes));
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131 RNG_RandomUpdate(&dwFreeClusters, sizeof(dwFreeClusters));
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132 RNG_RandomUpdate(&dwNumClusters, sizeof(dwNumClusters));
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133 }
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134
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135 nBytes = RNG_GetNoise(buffer, 20); // get up to 20 bytes
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136 RNG_RandomUpdate(buffer, nBytes);
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137 }
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138
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139
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140 /*
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141 * The RtlGenRandom function is declared in <ntsecapi.h>, but the
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142 * declaration is missing a calling convention specifier. So we
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143 * declare it manually here.
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144 */
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145 #define RtlGenRandom SystemFunction036
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146 DECLSPEC_IMPORT BOOLEAN WINAPI RtlGenRandom(
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147 PVOID RandomBuffer,
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148 ULONG RandomBufferLength);
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149
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150 size_t RNG_SystemRNG(void *dest, size_t maxLen)
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151 {
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152 size_t bytes = 0;
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153
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154 if (RtlGenRandom(dest, maxLen)) {
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155 bytes = maxLen;
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156 }
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157 return bytes;
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158 }
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159 #endif /* is XP_WIN */
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