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annotate cinst/windowsstore.c @ 1061:db831a204a6b

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(issue38) Show error message as messagebox if the window is visible
author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 10 Sep 2014 11:05:34 +0200
parents 698b6a9bd75e
children 265583011f24
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 #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);
222
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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);
215
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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 {
504
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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);
137
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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/