Mercurial > trustbridge

annotate cinst/windowsstore.c @ 502:e551de11d8b6

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Properly handle the case that the file does not exist. TRUNCATE makes create file fail if the file does not exist but we need TRUNCATE in the case that the file already exists
author Andre Heinecke <aheinecke@intevation.de>
date Mon, 28 Apr 2014 09:18:07 +0000
parents 17e1c8f37d72
children 3cf72c5282e8
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 printf ("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 printf ("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
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62 if (!to_remove)
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63 {
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64 return;
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65 }
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66
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67 for (i=0; to_remove[i]; i++)
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68 {
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69 PCCERT_CONTEXT pc_to_remove = NULL;
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70
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71 pc_to_remove = b64_to_cert_context(to_remove[i],
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72 strnlen(to_remove[i], MAX_LINE_LENGTH));
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73
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74 if (pc_to_remove == NULL)
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75 {
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76 char *error = getLastErrorMsg();
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77 if (error)
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78 {
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79 printf ("Failed to create cert context: %s \n", error);
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80 free (error);
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81 }
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82 continue;
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83 }
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84
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85 pCert = CertFindCertificateInStore (hStore,
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8fb12af98960 According to MSDN you Must also provide message encoding flag.
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86 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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87 0,
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88 CERT_FIND_EXISTING,
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89 pc_to_remove,
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90 NULL);
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91
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92 CertFreeCertificateContext (pc_to_remove);
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93
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94 if (pCert == NULL)
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95 {
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96 printf ("Did not find certificate\n");
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97 continue;
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98 }
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99
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100 if (!CertDeleteCertificateFromStore (pCert))
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101 {
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102 /* From MSDN:
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103 The CertDeleteCertificateFromStore function always frees
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104 pCertContext by calling the CertFreeCertificateContext
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105 function, even if an error is encountered. */
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106 char *error = getLastErrorMsg();
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107 printf ("Error deleting certificate. %s", error);
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108 free (error);
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109 continue;
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110 }
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111 }
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112 return;
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113 }
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114
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115 void
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116 do_install(HCERTSTORE hStore, char **to_install)
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117 {
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118 int i = 0,
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119 ret = -1;
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120
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121 if (!to_install)
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122 {
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123 return;
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124 }
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125
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126 for (i = 0; to_install[i]; i++)
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127 {
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128 PCCERT_CONTEXT pc_to_add = NULL;
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129 PCCERT_CONTEXT found_cert = NULL;
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130
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131 pc_to_add = b64_to_cert_context(to_install[i],
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132 strnlen(to_install[i], MAX_LINE_LENGTH));
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133
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134 if (pc_to_add == NULL)
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135 {
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136 continue;
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137 }
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138
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139 found_cert = CertFindCertificateInStore (hStore,
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140 X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
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141 0,
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142 CERT_FIND_EXISTING,
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143 pc_to_add,
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144 NULL);
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145 if (found_cert != NULL)
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146 {
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147 printf ("Certificate already in store\n");
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148 CertFreeCertificateContext (found_cert);
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149 CertFreeCertificateContext (pc_to_add);
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150 continue;
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151 }
215
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152
222
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153 ret = CertAddCertificateContextToStore (hStore,
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154 pc_to_add,
215
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155 CERT_STORE_ADD_ALWAYS,
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156 NULL);
222
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157 CertFreeCertificateContext (pc_to_add);
215
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158 if (!ret)
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159 {
253
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160 char *error = getLastErrorMsg();
215
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161 if (error)
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162 {
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163 printf ("Failed to add certificate: %s \n", error);
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164 free (error);
215
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165 }
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166 }
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167 }
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168 return;
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169 }
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170
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171 int
247
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172 write_stores_win (char **to_install, char **to_remove)
215
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173 {
163
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174 HCERTSTORE hStore = NULL;
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175
215
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176 if (!to_install && !to_remove)
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177 {
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178 /* Nothing to do */
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179 return 0;
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180 }
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181
247
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182 if (!is_elevated())
163
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183 {
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184 hStore = CertOpenStore (CERT_STORE_PROV_SYSTEM, 0,
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185 0, CERT_SYSTEM_STORE_CURRENT_USER, L"Root");
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186 }
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187 else
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188 {
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189 hStore = CertOpenStore (CERT_STORE_PROV_SYSTEM, 0,
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190 0, CERT_SYSTEM_STORE_LOCAL_MACHINE, L"Root");
137
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191 }
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192
163
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193 if (!hStore)
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194 {
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195 return ERR_STORE_ACCESS_DENIED;
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196 }
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197
215
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198 /* Do the actual work */
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199 do_install (hStore, to_install);
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200
215
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201 do_remove (hStore, to_remove);
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202
163
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203 if (hStore)
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204 {
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205 CertCloseStore (hStore, 0);
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206 }
163
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207 return 0;
137
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208 }
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209 #endif // WIN32
http://wald.intevation.org/projects/trustbridge/