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annotate common/binverify.c @ 579:f4ce4eef3b38

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Implement PKCS#7 embedded signature verfification for windows
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 27 May 2014 10:28:36 +0000
parents
children ecfd77751daf
rev   line source
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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2 * Software engineering by Intevation GmbH
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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3 *
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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4 * This file is Free Software under the GNU GPL (v>=2)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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5 * and comes with ABSOLUTELY NO WARRANTY!
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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6 * See LICENSE.txt for details.
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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7 */
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Andre Heinecke <aheinecke@intevation.de>
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8
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Andre Heinecke <aheinecke@intevation.de>
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9 #include "binverify.h"
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10
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11 #include "strhelp.h"
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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12 #include "logging.h"
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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13
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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14 #ifdef WIN32
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Andre Heinecke <aheinecke@intevation.de>
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15
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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16 #include <windows.h>
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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17 #include <wincrypt.h>
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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18 #include <wintrust.h>
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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19 #include <stdio.h>
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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20
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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21 bin_verify_result
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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22 verify_binary_win(const char *filename, size_t name_len) {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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23 bin_verify_result retval = UnknownError;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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24 WCHAR *filenameW = NULL;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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25 BOOL result = FALSE;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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26 DWORD dwEncoding = 0,
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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27 dwContentType = 0,
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28 dwFormatType = 0,
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29 dwSignerInfoSize = 0;
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30 HCERTSTORE hStore = NULL;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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31 HCRYPTMSG hMsg = NULL;
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32 PCERT_INFO pSignerCert = NULL;
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33 PCCERT_CONTEXT pSignerCertContext = NULL;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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34
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35 if (!filename || name_len > MAX_PATH || strlen(filename) != name_len)
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Andre Heinecke <aheinecke@intevation.de>
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36 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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37 ERRORPRINTF ("Invalid parameters\n");
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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38 return UnknownError;
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Andre Heinecke <aheinecke@intevation.de>
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39 }
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40
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41 filenameW = utf8_to_wchar(filename, strnlen(filename, MAX_PATH));
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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42
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Andre Heinecke <aheinecke@intevation.de>
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43 result = CryptQueryObject (CERT_QUERY_OBJECT_FILE,
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44 filenameW,
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45 CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
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46 CERT_QUERY_FORMAT_FLAG_BINARY,
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47 0,
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48 &dwEncoding,
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49 &dwContentType,
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50 &dwFormatType,
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51 &hStore,
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52 &hMsg,
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53 NULL);
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54
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55 if (!result || !hMsg)
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56 {
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57 PRINTLASTERROR ("Failed to query crypto object");
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58 retval = ReadFailed;
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59 goto done;
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60 }
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61
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62 /* Get the cert info so that we can look up the signer in the store later */
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63 if (CryptMsgGetParam(hMsg,
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64 CMSG_SIGNER_CERT_INFO_PARAM,
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65 0,
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66 NULL,
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67 &dwSignerInfoSize) && dwSignerInfoSize > 0)
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68 {
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69 pSignerCert = xmalloc (dwSignerInfoSize);
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70 }
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71 else
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72 {
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73 ERRORPRINTF ("Failed to get signer cert size.");
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74 retval = UnknownError;
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75 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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76 }
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Andre Heinecke <aheinecke@intevation.de>
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77
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Andre Heinecke <aheinecke@intevation.de>
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78 if (!(CryptMsgGetParam(hMsg,
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79 CMSG_SIGNER_CERT_INFO_PARAM,
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80 0,
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Andre Heinecke <aheinecke@intevation.de>
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81 pSignerCert,
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Andre Heinecke <aheinecke@intevation.de>
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82 &dwSignerInfoSize)))
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Andre Heinecke <aheinecke@intevation.de>
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83 {
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Andre Heinecke <aheinecke@intevation.de>
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84 ERRORPRINTF ("Failed to get signer cert.");
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Andre Heinecke <aheinecke@intevation.de>
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85 retval = UnknownError;
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Andre Heinecke <aheinecke@intevation.de>
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86 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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87 }
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Andre Heinecke <aheinecke@intevation.de>
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88
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Andre Heinecke <aheinecke@intevation.de>
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89 pSignerCertContext = CertGetSubjectCertificateFromStore(
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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90 hStore,
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Andre Heinecke <aheinecke@intevation.de>
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91 PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
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92 pSignerCert);
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Andre Heinecke <aheinecke@intevation.de>
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93
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Andre Heinecke <aheinecke@intevation.de>
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94 if (!pSignerCertContext)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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95 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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96 ERRORPRINTF ("Failed to find signer cert in store.");
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97 retval = UnknownError;
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98 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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99 }
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Andre Heinecke <aheinecke@intevation.de>
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100
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Andre Heinecke <aheinecke@intevation.de>
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101 /* Verify that the signature is actually valid */
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Andre Heinecke <aheinecke@intevation.de>
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102 if(CryptMsgControl(hMsg,
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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103 0,
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104 CMSG_CTRL_VERIFY_SIGNATURE,
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105 pSignerCertContext->pCertInfo))
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Andre Heinecke <aheinecke@intevation.de>
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106 {
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107 DEBUGPRINTF ("Verify signature succeeded. \n");
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108 /* TODO pinning*/
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109 retval = Valid;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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110 } else {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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111 ERRORPRINTF ("The signature was not verified. \n");
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112 retval = InvalidSignature;
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113 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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114 }
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115
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Andre Heinecke <aheinecke@intevation.de>
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116 done:
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117 xfree(filenameW);
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118 xfree(pSignerCert);
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119
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Andre Heinecke <aheinecke@intevation.de>
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120 if(pSignerCertContext)
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Andre Heinecke <aheinecke@intevation.de>
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121 {
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122 CertFreeCertificateContext(pSignerCertContext);
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Andre Heinecke <aheinecke@intevation.de>
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123 }
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Andre Heinecke <aheinecke@intevation.de>
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124 if (hStore)
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Andre Heinecke <aheinecke@intevation.de>
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125 {
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Andre Heinecke <aheinecke@intevation.de>
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126 CertCloseStore(hStore, 0);
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Andre Heinecke <aheinecke@intevation.de>
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127 }
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Andre Heinecke <aheinecke@intevation.de>
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128 if (hMsg)
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Andre Heinecke <aheinecke@intevation.de>
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129 {
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Andre Heinecke <aheinecke@intevation.de>
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130 CryptMsgClose(hMsg);
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Andre Heinecke <aheinecke@intevation.de>
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131 }
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Andre Heinecke <aheinecke@intevation.de>
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132 return retval;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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133 }
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134 #endif /* WIN32 */
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