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annotate common/binverify.c @ 586:ecfd77751daf

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Disambiguate enumerator values and add portable wrapper.
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 27 May 2014 16:30:58 +0000
parents f4ce4eef3b38
children c93730ef2a3a
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
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2 * Software engineering by Intevation GmbH
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3 *
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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
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5 * and comes with ABSOLUTELY NO WARRANTY!
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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6 * See LICENSE.txt for details.
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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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"
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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13
586
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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);
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
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18 #else
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19 /* TODO */
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20 return VerifyValid;
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21 #endif
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22 }
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23
579
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24 #ifdef WIN32
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25
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26 #include <windows.h>
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27 #include <wincrypt.h>
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28 #include <wintrust.h>
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29 #include <stdio.h>
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30
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31 bin_verify_result
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32 verify_binary_win(const char *filename, size_t name_len) {
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33 bin_verify_result retval = VerifyUnknownError;
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34 WCHAR *filenameW = NULL;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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35 BOOL result = FALSE;
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36 DWORD dwEncoding = 0,
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37 dwContentType = 0,
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38 dwFormatType = 0,
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39 dwSignerInfoSize = 0;
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40 HCERTSTORE hStore = NULL;
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41 HCRYPTMSG hMsg = NULL;
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42 PCERT_INFO pSignerCert = NULL;
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43 PCCERT_CONTEXT pSignerCertContext = NULL;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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44
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45 if (!filename || name_len > MAX_PATH || strlen(filename) != name_len)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
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46 {
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47 ERRORPRINTF ("Invalid parameters\n");
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48 return VerifyUnknownError;
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49 }
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50
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51 filenameW = utf8_to_wchar(filename, strnlen(filename, MAX_PATH));
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52
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53 result = CryptQueryObject (CERT_QUERY_OBJECT_FILE,
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54 filenameW,
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55 CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
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56 CERT_QUERY_FORMAT_FLAG_BINARY,
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57 0,
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58 &dwEncoding,
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59 &dwContentType,
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60 &dwFormatType,
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61 &hStore,
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62 &hMsg,
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63 NULL);
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64
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65 if (!result || !hMsg)
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66 {
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67 PRINTLASTERROR ("Failed to query crypto object");
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68 retval = VerifyReadFailed;
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69 goto done;
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70 }
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71
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72 /* Get the cert info so that we can look up the signer in the store later */
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73 if (CryptMsgGetParam(hMsg,
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74 CMSG_SIGNER_CERT_INFO_PARAM,
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75 0,
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76 NULL,
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77 &dwSignerInfoSize) && dwSignerInfoSize > 0)
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78 {
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79 pSignerCert = xmalloc (dwSignerInfoSize);
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80 }
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81 else
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82 {
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83 ERRORPRINTF ("Failed to get signer cert size.");
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84 retval = VerifyUnknownError;
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85 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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86 }
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Andre Heinecke <aheinecke@intevation.de>
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87
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88 if (!(CryptMsgGetParam(hMsg,
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89 CMSG_SIGNER_CERT_INFO_PARAM,
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90 0,
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91 pSignerCert,
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Andre Heinecke <aheinecke@intevation.de>
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92 &dwSignerInfoSize)))
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Andre Heinecke <aheinecke@intevation.de>
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93 {
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94 ERRORPRINTF ("Failed to get signer cert.");
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95 retval = VerifyUnknownError;
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96 goto done;
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97 }
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98
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99 pSignerCertContext = CertGetSubjectCertificateFromStore(
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100 hStore,
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101 PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
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102 pSignerCert);
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103
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Andre Heinecke <aheinecke@intevation.de>
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104 if (!pSignerCertContext)
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Andre Heinecke <aheinecke@intevation.de>
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105 {
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Andre Heinecke <aheinecke@intevation.de>
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106 ERRORPRINTF ("Failed to find signer cert in store.");
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107 retval = VerifyUnknownError;
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108 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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109 }
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110
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111 /* Verify that the signature is actually valid */
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112 if(CryptMsgControl(hMsg,
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Andre Heinecke <aheinecke@intevation.de>
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113 0,
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114 CMSG_CTRL_VERIFY_SIGNATURE,
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115 pSignerCertContext->pCertInfo))
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116 {
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117 DEBUGPRINTF ("Verify signature succeeded. \n");
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118 /* TODO pinning*/
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119 retval = VerifyValid;
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120 } else {
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121 ERRORPRINTF ("The signature was not verified. \n");
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122 retval = VerifyInvalidSignature;
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123 goto done;
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124 }
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125
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126 done:
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127 xfree(filenameW);
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128 xfree(pSignerCert);
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129
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Andre Heinecke <aheinecke@intevation.de>
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130 if(pSignerCertContext)
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131 {
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132 CertFreeCertificateContext(pSignerCertContext);
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133 }
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134 if (hStore)
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135 {
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136 CertCloseStore(hStore, 0);
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137 }
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138 if (hMsg)
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139 {
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140 CryptMsgClose(hMsg);
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141 }
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142 return retval;
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143 }
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144 #endif /* WIN32 */
http://wald.intevation.org/projects/trustbridge/