Mercurial > trustbridge

annotate common/logging.c @ 856:797aa8d9c785

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(issue48) Fallback to HKEY_USERS on hive load failure If the hive can not be loaded it might mean that the user is currently logged on. In that case we can access his registry via HKEY_USERS.
author Andre Heinecke <andre.heinecke@intevation.de>
date Thu, 31 Jul 2014 12:56:26 +0200
parents 2303caf56dbb
children 698b6a9bd75e
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 #include "logging.h"
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9 #include "strhelp.h"
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10
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11 #include <stdio.h>
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12 #include <stdarg.h>
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13 #include <stdbool.h>
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14
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15 #include <strhelp.h>
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16
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17 #include <certhelp.h>
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18
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19 #include <polarssl/sha256.h>
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20
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21 #ifdef WIN32
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22 # include <windows.h>
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23 # include "events.h"
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24 #else
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25 # include <syslog.h>
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26 #endif
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27
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28 #ifdef WIN32
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29
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30 /** @brief helper to prepare common logging information */
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31 static void
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32 win_do_log(WORD type, WORD category, DWORD eventID, WORD numStrings, LPCWSTR *strings)
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33 {
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34 HANDLE log_src = NULL,
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35 process_token = NULL;
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36 PTOKEN_USER user_struct = NULL;
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37 PSID user_sid = NULL;
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38 BOOL success = FALSE;
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39
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40 log_src = RegisterEventSourceW (NULL, L"" LOG_NAME);
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41
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42 if (log_src == NULL)
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43 {
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44 PRINTLASTERROR ("Failed to open log source.");
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45 return;
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46 }
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47
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48 /* Get the current user sid for logging */
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49 OpenProcessToken (GetCurrentProcess(), TOKEN_READ, &process_token);
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50 if (process_token)
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51 {
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52 DWORD size = 0;
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53
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54 // check how much space is needed
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55 GetTokenInformation (process_token, TokenUser, NULL, 0, &size);
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56 if (ERROR_INSUFFICIENT_BUFFER == GetLastError())
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57 {
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58 user_struct = xmalloc (size);
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59 GetTokenInformation (process_token, TokenUser, user_struct, size, &size);
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60 user_sid = user_struct->User.Sid;
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61 }
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62 }
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63
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64 success = ReportEventW (log_src,
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65 type,
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66 category,
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67 eventID,
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68 user_sid,
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69 numStrings,
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70 0,
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71 strings,
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72 NULL);
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73 if (!success)
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74 {
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75 PRINTLASTERROR ("Failed to report event.");
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76 }
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77
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78 if (process_token)
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79 {
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80 CloseHandle(process_token);
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81 }
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82 xfree (user_struct);
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83
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84 if (!DeregisterEventSource (log_src))
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85 {
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86 PRINTLASTERROR ("Failed to close log source.");
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87 }
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88 }
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89
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90 static void
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91 win_log(const char *format, va_list ap, bool error)
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92 {
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93 wchar_t *wmsg = NULL;
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94 char buffer[MAX_LOG+1];
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95 vsnprintf (buffer, MAX_LOG, format, ap);
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96
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97 buffer[MAX_LOG] = '\0';
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98
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99 wmsg = utf8_to_wchar (buffer, strlen(buffer));
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100 if (wmsg == NULL)
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101 {
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102 ERRORPRINTF ("Failed to convert log message to utf-16");
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103 return;
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104 }
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105
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106 win_do_log (error ? EVENTLOG_ERROR_TYPE : EVENTLOG_INFORMATION_TYPE,
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107 EVENT_CAT_TB,
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108 error ? MSG_DEFAULT_ERROR : MSG_DEFAULT_INFO,
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109 1,
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110 (const WCHAR **) &wmsg);
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111
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112
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113 xfree (wmsg);
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114
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115 return;
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116 }
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117
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118 char *
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119 getLastErrorMsg()
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120 {
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121 LPWSTR bufPtr = NULL;
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122 DWORD err = GetLastError();
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123 char *retval = NULL;
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124 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER |
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125 FORMAT_MESSAGE_FROM_SYSTEM |
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126 FORMAT_MESSAGE_IGNORE_INSERTS,
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127 NULL, err, 0, (LPWSTR) &bufPtr, 0, NULL);
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128 if (!bufPtr)
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129 {
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130 HMODULE hWinhttp = GetModuleHandleW (L"crypt32");
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131 if (hWinhttp)
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132 {
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133 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER |
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134 FORMAT_MESSAGE_FROM_HMODULE |
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135 FORMAT_MESSAGE_IGNORE_INSERTS,
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136 hWinhttp, HRESULT_CODE (err), 0,
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137 (LPWSTR) &bufPtr, 0, NULL);
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138 }
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139 }
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140 if (!bufPtr) {
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141 fprintf (stderr, "Error getting last error for code: %lx \n", err);
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142 return NULL;
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143 }
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144
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145 retval = wchar_to_utf8(bufPtr, wcslen(bufPtr));
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146 LocalFree (bufPtr);
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147
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148 return retval;
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149 }
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150
615
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151 #else /* WIN32 */
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152
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153 static void
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154 linux_log (const char *format, va_list ap, bool error)
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155 {
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156 openlog (LOG_NAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_USER);
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157 vsyslog ( error ? LOG_ERR : LOG_INFO, format, ap);
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158 }
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159
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160 #endif /* WIN32 */
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161
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162 void
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163 log_certificate(const char* store, char *b64cert, bool install)
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164 {
625
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165 char *der_data = NULL;
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166 size_t der_size = 0;
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167 int ret = 0;
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168
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169 ret = str_base64_decode (&der_data, &der_size, b64cert, strlen(b64cert));
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170
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171 if (ret != 0)
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172 {
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173 ERRORPRINTF ("Error decoding certificate.\n");
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174 return;
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175 }
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176
625
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177 log_certificate_der (store, (unsigned char *) der_data, der_size, install);
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178
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179 xfree (der_data);
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180 }
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181
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182 void
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183 log_certificate_der(const char *store, unsigned char *der_data, size_t der_size, bool install)
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184 {
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185 char subject[MAX_LOG + 1];
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186 int ret = 0,
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187 i = 0;
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188 x509_crt chain;
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189 unsigned char sha256sum[32];
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190 char fingerprint[32 * 3 + 1];
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191
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192 x509_crt_init(&chain);
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193 if (x509_crt_parse_der(&chain, (const unsigned char *)der_data,
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194 der_size) != 0)
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195 {
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196 ERRORPRINTF("Failed to parse cert..");
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197 return;
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198 }
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199
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200 ret = x509_dn_gets(subject, MAX_LOG, &(chain.subject));
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201
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202 if (ret == -1)
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203 {
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204 ERRORPRINTF("Failed to parse subject..");
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205 return;
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206 }
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207 subject[MAX_LOG] = '\0';
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208
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209 sha256 (chain.raw.p, chain.raw.len, sha256sum, 0);
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210
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211 for (i = 0; i < 31; i++)
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212 {
625
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213 snprintf (fingerprint + (i * 3), 4, "%02X:", sha256sum[i]);
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214 }
625
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215 snprintf (fingerprint + (31 * 3), 3, "%02X", sha256sum[31]);
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216
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217 fingerprint[32*3] = '\0';
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218
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219 #ifdef WIN32
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220 {
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221 wchar_t *wstrings[3];
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222
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223 wstrings[0] = utf8_to_wchar (subject, strnlen (subject, MAX_LOG));
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224 wstrings[1] = utf8_to_wchar (fingerprint, strnlen (fingerprint, MAX_LOG));
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225 wstrings[2] = utf8_to_wchar (store, strnlen (store, MAX_LOG));
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226
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227 win_do_log (EVENTLOG_INFORMATION_TYPE,
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228 EVENT_CAT_CINST,
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229 install ? MSG_CERT_INSTALL : MSG_CERT_REMOVE,
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230 3,
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231 (const WCHAR**) wstrings);
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232 xfree (wstrings[0]);
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233 xfree (wstrings[1]);
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234 xfree (wstrings[2]);
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235 }
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236 #else
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237 /* Please keep the following line in line with message from events.mc */
625
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238 syslog_info_printf ("%s of root certificate: %s Sha256 thumbprint:<%s>. Certificate store \"%s\"",
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239 install ? "Installation" : "Removal",
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240 subject, fingerprint, store);
623
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241 #endif
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242 x509_crt_free (&chain);
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243 }
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244
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245 void
615
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246 syslog_info_printf(const char *format, ...)
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247 {
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248 va_list args;
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249 va_start (args, format);
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250 #ifdef WIN32
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251 win_log (format, args, false);
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252 #else
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253 linux_log (format, args, false);
252
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254 #endif
615
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255 va_end (args);
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256 }
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257
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258 void
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259 syslog_error_printf(const char *format, ...)
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260 {
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261 va_list args;
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262 va_start (args, format);
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263 #ifdef WIN32
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264 win_log (format, args, true);
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265 #else
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266 linux_log (format, args, true);
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267 #endif
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268 va_end (args);
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269 }
http://wald.intevation.org/projects/trustbridge/