Mercurial > trustbridge

annotate cinst/windowsstore.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 f595fcbe3e76
children 698b6a9bd75e
rev   line source
404
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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 #ifdef WIN32
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9
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10 #include <stdio.h>
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11
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12 #include "windowsstore.h"
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13 #include "errorcodes.h"
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14 #include "listutil.h"
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15 #include "strhelp.h"
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16 #include "logging.h"
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17 #include "util.h"
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18
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19 static PCCERT_CONTEXT
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20 b64_to_cert_context(char *b64_data, size_t b64_size)
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21 {
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22 size_t buf_size = 0;
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23 char *buf = NULL;
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24 PCCERT_CONTEXT pCert = NULL;
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25 int ret = -1;
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26
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27 ret = str_base64_decode (&buf, &buf_size, b64_data, b64_size);
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28
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29 if (ret != 0)
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30 {
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31 ERRORPRINTF ("decoding certificate failed\n");
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32 return NULL;
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33 }
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34
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35 pCert = CertCreateContext (CERT_STORE_CERTIFICATE_CONTEXT,
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36 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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37 (const PBYTE) buf,
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38 (DWORD) buf_size,
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39 0,
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40 NULL);
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41 free (buf); /* Windows has a copy */
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42
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43 if (pCert == NULL)
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44 {
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45 char *error = getLastErrorMsg();
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46 if (error)
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47 {
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48 ERRORPRINTF ("Failed to create cert context: %s \n", error);
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49 free (error);
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50 }
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51 return NULL;
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52 }
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53 return pCert;
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54 }
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55
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56 void
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57 do_remove(HCERTSTORE hStore, char **to_remove)
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58 {
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59 PCCERT_CONTEXT pCert = NULL;
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60 unsigned int i = 0;
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61 bool elevated = is_elevated();
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62
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63 if (!to_remove)
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64 {
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65 return;
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66 }
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67
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68 for (i=0; to_remove[i]; i++)
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69 {
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70 PCCERT_CONTEXT pc_to_remove = NULL;
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71
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72 pc_to_remove = b64_to_cert_context(to_remove[i],
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73 strnlen(to_remove[i], MAX_LINE_LENGTH));
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74
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75 if (pc_to_remove == NULL)
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76 {
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77 char *error = getLastErrorMsg();
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78 if (error)
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79 {
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80 ERRORPRINTF ("Failed to create cert context: %s \n", error);
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81 free (error);
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82 }
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83 continue;
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84 }
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85
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86 pCert = CertFindCertificateInStore (hStore,
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87 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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88 0,
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89 CERT_FIND_EXISTING,
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90 pc_to_remove,
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91 NULL);
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92
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93 CertFreeCertificateContext (pc_to_remove);
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94
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95 if (pCert == NULL)
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96 {
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97 ERRORPRINTF ("Did not find certificate\n");
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98 continue;
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99 }
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100
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101 if (!CertDeleteCertificateFromStore (pCert))
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102 {
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103 /* From MSDN:
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104 The CertDeleteCertificateFromStore function always frees
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105 pCertContext by calling the CertFreeCertificateContext
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106 function, even if an error is encountered. */
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107 char *error = getLastErrorMsg();
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108 ERRORPRINTF ("Error deleting certificate. %s", error);
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109 free (error);
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110 continue;
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111 }
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112 log_certificate (elevated ? "Local Machine" : "Current User",
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113 to_remove[i], false);
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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 void
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119 do_install(HCERTSTORE hStore, char **to_install)
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120 {
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121 int i = 0,
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122 ret = -1;
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123 bool elevated = is_elevated();
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124
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125 if (!to_install)
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126 {
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127 return;
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128 }
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129
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130 for (i = 0; to_install[i]; i++)
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131 {
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132 PCCERT_CONTEXT pc_to_add = NULL;
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133 PCCERT_CONTEXT found_cert = NULL;
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134
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135 pc_to_add = b64_to_cert_context(to_install[i],
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136 strnlen(to_install[i], MAX_LINE_LENGTH));
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137
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138 if (pc_to_add == NULL)
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139 {
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140 continue;
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141 }
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142
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143 found_cert = CertFindCertificateInStore (hStore,
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144 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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145 0,
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146 CERT_FIND_EXISTING,
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147 pc_to_add,
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148 NULL);
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149 if (found_cert != NULL)
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150 {
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151 DEBUGPRINTF ("Certificate already in store\n");
222
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152 CertFreeCertificateContext (found_cert);
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153 CertFreeCertificateContext (pc_to_add);
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154 continue;
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155 }
215
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156
222
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157 ret = CertAddCertificateContextToStore (hStore,
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158 pc_to_add,
215
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159 CERT_STORE_ADD_ALWAYS,
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160 NULL);
222
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161 CertFreeCertificateContext (pc_to_add);
215
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162 if (!ret)
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163 {
253
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164 char *error = getLastErrorMsg();
215
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165 if (error)
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166 {
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167 ERRORPRINTF ("Failed to add certificate: %s \n", error);
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168 free (error);
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169 }
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170 }
624
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171 log_certificate (elevated ? "Local Machine" : "Current User",
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172 to_install[i], true);
215
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173 }
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174 return;
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175 }
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176
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177 int
247
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178 write_stores_win (char **to_install, char **to_remove)
215
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179 {
163
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180 HCERTSTORE hStore = NULL;
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181
215
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182 if (!to_install && !to_remove)
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183 {
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184 /* Nothing to do */
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185 return 0;
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186 }
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187
247
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188 if (!is_elevated())
163
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189 {
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190 hStore = CertOpenStore (CERT_STORE_PROV_SYSTEM, 0,
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191 0, CERT_SYSTEM_STORE_CURRENT_USER, L"Root");
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192 }
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193 else
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194 {
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195 hStore = CertOpenStore (CERT_STORE_PROV_SYSTEM, 0,
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196 0, CERT_SYSTEM_STORE_LOCAL_MACHINE, L"Root");
137
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197 }
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198
163
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199 if (!hStore)
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200 {
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201 ERRORPRINTF ("Failed to access store.\n");
163
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202 return ERR_STORE_ACCESS_DENIED;
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203 }
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204
215
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205 /* Do the actual work */
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206 do_install (hStore, to_install);
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207
215
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208 do_remove (hStore, to_remove);
161
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209
163
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210 if (hStore)
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211 {
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212 CertCloseStore (hStore, 0);
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213 }
163
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214 return 0;
137
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215 }
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216 #endif // WIN32
http://wald.intevation.org/projects/trustbridge/