Mercurial > trustbridge

annotate common/logging.c @ 1395:a2574a029322

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Fix Base 64 signature size calculation. If the signature byte size is not equally dividable by three the base 64 encoding needs three additional bytes. The value is now fixed to avoid such errors in the future.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 26 Jan 2015 13:17:32 +0100
parents 698b6a9bd75e
children
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 {
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142 fprintf (stderr, "Error getting last error for code: %lx \n", err);
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143 return NULL;
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144 }
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145
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146 retval = wchar_to_utf8(bufPtr, wcslen(bufPtr));
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147 LocalFree (bufPtr);
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148
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149 return retval;
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150 }
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151
615
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152 #else /* WIN32 */
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153
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154 static void
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155 linux_log (const char *format, va_list ap, bool error)
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156 {
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157 openlog (LOG_NAME, LOG_CONS | LOG_PID | LOG_NDELAY, LOG_USER);
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158 vsyslog ( error ? LOG_ERR : LOG_INFO, format, ap);
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159 }
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160
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161 #endif /* WIN32 */
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162
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163 void
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164 log_certificate(const char* store, char *b64cert, bool install)
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165 {
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166 char *der_data = NULL;
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167 size_t der_size = 0;
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168 int ret = 0;
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169
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170 ret = str_base64_decode (&der_data, &der_size, b64cert, strlen(b64cert));
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171
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172 if (ret != 0)
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173 {
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174 ERRORPRINTF ("Error decoding certificate.\n");
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175 return;
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176 }
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177
625
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178 log_certificate_der (store, (unsigned char *) der_data, der_size, install);
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179
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180 xfree (der_data);
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181 }
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182
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183 void
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184 log_certificate_der(const char *store, unsigned char *der_data, size_t der_size, bool install)
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185 {
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186 char subject[MAX_LOG + 1];
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187 int ret = 0,
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188 i = 0;
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189 x509_crt chain;
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190 unsigned char sha256sum[32];
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191 char fingerprint[32 * 3 + 1];
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192
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193 x509_crt_init(&chain);
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194 if (x509_crt_parse_der(&chain, (const unsigned char *)der_data,
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195 der_size) != 0)
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196 {
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197 ERRORPRINTF("Failed to parse cert..");
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198 return;
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199 }
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200
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201 ret = x509_dn_gets(subject, MAX_LOG, &(chain.subject));
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202
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203 if (ret == -1)
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204 {
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205 ERRORPRINTF("Failed to parse subject..");
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206 return;
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207 }
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208 subject[MAX_LOG] = '\0';
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209
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210 sha256 (chain.raw.p, chain.raw.len, sha256sum, 0);
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211
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212 for (i = 0; i < 31; i++)
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213 {
625
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214 snprintf (fingerprint + (i * 3), 4, "%02X:", sha256sum[i]);
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215 }
625
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216 snprintf (fingerprint + (31 * 3), 3, "%02X", sha256sum[31]);
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217
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218 fingerprint[32*3] = '\0';
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219
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220 #ifdef WIN32
905
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221 {
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222 wchar_t *wstrings[3];
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223
905
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224 wstrings[0] = utf8_to_wchar (subject, strnlen (subject, MAX_LOG));
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225 wstrings[1] = utf8_to_wchar (fingerprint, strnlen (fingerprint, MAX_LOG));
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226 wstrings[2] = utf8_to_wchar (store, strnlen (store, MAX_LOG));
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227
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228 win_do_log (EVENTLOG_INFORMATION_TYPE,
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229 EVENT_CAT_CINST,
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230 install ? MSG_CERT_INSTALL : MSG_CERT_REMOVE,
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231 3,
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232 (const WCHAR**) wstrings);
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233 xfree (wstrings[0]);
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234 xfree (wstrings[1]);
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235 xfree (wstrings[2]);
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236 }
623
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237 #else
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238 /* Please keep the following line in line with message from events.mc */
625
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239 syslog_info_printf ("%s of root certificate: %s Sha256 thumbprint:<%s>. Certificate store \"%s\"",
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240 install ? "Installation" : "Removal",
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241 subject, fingerprint, store);
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242 #endif
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243 x509_crt_free (&chain);
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244 }
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245
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246 void
615
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247 syslog_info_printf(const char *format, ...)
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248 {
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249 va_list args;
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250 va_start (args, format);
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251 #ifdef WIN32
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252 win_log (format, args, false);
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253 #else
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254 linux_log (format, args, false);
252
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255 #endif
615
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256 va_end (args);
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257 }
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258
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259 void
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260 syslog_error_printf(const char *format, ...)
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261 {
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262 va_list args;
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263 va_start (args, format);
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264 #ifdef WIN32
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265 win_log (format, args, true);
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266 #else
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267 linux_log (format, args, true);
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268 #endif
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269 va_end (args);
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270 }
http://wald.intevation.org/projects/trustbridge/