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annotate common/binverify.c @ 615:2a4f7364ab81

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Add first simple event logging functions
author Andre Heinecke <andre.heinecke@intevation.de>
date Thu, 19 Jun 2014 11:53:07 +0200
parents 26a18e3c3db4
children facb13c578f1
rev   line source
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
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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)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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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
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9 #include "binverify.h"
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10
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11 #include "strhelp.h"
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12 #include "logging.h"
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13
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14 bin_verify_result
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15 verify_binary(const char *filename, size_t name_len) {
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16 #ifdef WIN32
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17 return verify_binary_win(filename, name_len);
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18 #else
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19 /* TODO */
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20 if (filename && name_len)
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21 return VerifyValid;
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22 return VerifyUnknownError;
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23 #endif
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24 }
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25
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26 #ifdef WIN32
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27
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28 #include <windows.h>
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29 #include <wincrypt.h>
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30 #include <wintrust.h>
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31 #include <stdio.h>
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32
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33 bin_verify_result
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34 verify_binary_win(const char *filename, size_t name_len) {
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35 bin_verify_result retval = VerifyUnknownError;
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36 WCHAR *filenameW = NULL;
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37 BOOL result = FALSE;
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38 DWORD dwEncoding = 0,
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39 dwContentType = 0,
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40 dwFormatType = 0,
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41 dwSignerInfoSize = 0;
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42 HCERTSTORE hStore = NULL;
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43 HCRYPTMSG hMsg = NULL;
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44 PCERT_INFO pSignerCert = NULL;
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45 PCCERT_CONTEXT pSignerCertContext = NULL;
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46
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47 if (!filename || name_len > MAX_PATH || strlen(filename) != name_len)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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48 {
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49 ERRORPRINTF ("Invalid parameters\n");
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50 return VerifyUnknownError;
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51 }
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52
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53 filenameW = utf8_to_wchar(filename, name_len);
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54
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55 result = CryptQueryObject (CERT_QUERY_OBJECT_FILE,
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56 filenameW,
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57 CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
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58 CERT_QUERY_FORMAT_FLAG_BINARY,
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59 0,
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60 &dwEncoding,
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61 &dwContentType,
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62 &dwFormatType,
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63 &hStore,
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64 &hMsg,
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65 NULL);
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66
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67 if (!result || !hMsg)
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68 {
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69 PRINTLASTERROR ("Failed to query crypto object");
586
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70 retval = VerifyReadFailed;
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71 goto done;
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72 }
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73
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74 /* Get the cert info so that we can look up the signer in the store later */
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75 if (CryptMsgGetParam(hMsg,
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76 CMSG_SIGNER_CERT_INFO_PARAM,
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77 0,
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78 NULL,
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Andre Heinecke <aheinecke@intevation.de>
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79 &dwSignerInfoSize) && dwSignerInfoSize > 0)
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80 {
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81 pSignerCert = xmalloc (dwSignerInfoSize);
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82 }
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83 else
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84 {
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85 ERRORPRINTF ("Failed to get signer cert size.");
586
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86 retval = VerifyUnknownError;
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87 goto done;
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88 }
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Andre Heinecke <aheinecke@intevation.de>
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89
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90 if (!(CryptMsgGetParam(hMsg,
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91 CMSG_SIGNER_CERT_INFO_PARAM,
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92 0,
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93 pSignerCert,
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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94 &dwSignerInfoSize)))
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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95 {
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96 ERRORPRINTF ("Failed to get signer cert.");
586
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97 retval = VerifyUnknownError;
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98 goto done;
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99 }
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100
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101 pSignerCertContext = CertGetSubjectCertificateFromStore(
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102 hStore,
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103 PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
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104 pSignerCert);
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105
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106 if (!pSignerCertContext)
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Andre Heinecke <aheinecke@intevation.de>
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107 {
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108 ERRORPRINTF ("Failed to find signer cert in store.");
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109 retval = VerifyUnknownError;
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110 goto done;
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111 }
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112
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113 /* Verify that the signature is actually valid */
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114 if(CryptMsgControl(hMsg,
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115 0,
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116 CMSG_CTRL_VERIFY_SIGNATURE,
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117 pSignerCertContext->pCertInfo))
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118 {
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119 DEBUGPRINTF ("Verify signature succeeded. \n");
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120 /* TODO pinning*/
586
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121 retval = VerifyValid;
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122 } else {
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123 ERRORPRINTF ("The signature was not verified. \n");
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124 retval = VerifyInvalidSignature;
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125 goto done;
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126 }
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127
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128 done:
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129 xfree(filenameW);
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130 xfree(pSignerCert);
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131
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Andre Heinecke <aheinecke@intevation.de>
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132 if(pSignerCertContext)
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133 {
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134 CertFreeCertificateContext(pSignerCertContext);
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135 }
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136 if (hStore)
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137 {
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138 CertCloseStore(hStore, 0);
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139 }
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140 if (hMsg)
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141 {
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142 CryptMsgClose(hMsg);
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143 }
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144 return retval;
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145 }
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146 #endif /* WIN32 */
http://wald.intevation.org/projects/trustbridge/