annotate common/binverify.c @ 757:9bfaced5cf59

(issue56) Do not delete the certificate immediately When the selection changed the remove cert is triggered by a slection change event in the certificateitem. Deleting it immediately would delete the trigger of the call. Instead we deleteLater so that the widget get's cleaned up in the next mainloop iteration when it is no longer needed.
author Andre Heinecke <andre.heinecke@intevation.de>
date Mon, 07 Jul 2014 12:54:02 +0200
parents be30d50bc4f0
children 2798f1869eee
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
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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 #ifdef RELEASE_BUILD
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15 #include "pubkey-release.h"
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16 #else
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17 #include "pubkey-test.h"
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18 #endif
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19
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20 bin_verify_result
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21 verify_binary(const char *filename, size_t name_len) {
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22 #ifdef WIN32
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23 return verify_binary_win(filename, name_len);
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24 #else
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25 /* TODO */
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26 if (filename && name_len)
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27 return VerifyValid;
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28 return VerifyUnknownError;
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29 #endif
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30 }
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31
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32 #ifdef WIN32
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33
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34 #include <polarssl/x509_crt.h>
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35
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36 #include <windows.h>
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37 #include <wincrypt.h>
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38 #include <wintrust.h>
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39 #include <stdio.h>
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40
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41
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42 /** @brief Check if the certificate @a pCCertContext is pinned
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43 *
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44 * Compares the certificate's binary data (public key and attributes)
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45 * with each other to validate that the certificate pCCertContext has
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46 * exactly the same data as the builtin public certificate.
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47 *
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48 * @param[in] pCCertContext pointer to the certificate to check
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49 *
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50 * @returns true if the certificate matches, false otherwise.
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51 */
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52 static bool
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53 check_certificate (PCCERT_CONTEXT pCCertContext)
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54 {
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55 x509_crt codesign_cert;
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56 int ret = 0;
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57 DWORD dwI = 0;
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58 bool retval = false;
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59
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60 if (pCCertContext == NULL)
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61 {
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62 ERRORPRINTF ("Invalid call to check_certificate");
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63 return false;
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64 }
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65
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66 x509_crt_init(&codesign_cert);
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67
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68 /* Parse the pinned certificate */
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69 ret = x509_crt_parse(&codesign_cert,
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70 public_key_codesign_pem,
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71 public_key_codesign_pem_size);
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72 if (ret != 0)
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73 {
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74 ERRORPRINTF ("x509_crt_parse failed with -0x%04x\n\n", -ret);
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75 goto done;
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76 }
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77
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78 if (codesign_cert.raw.len != pCCertContext->cbCertEncoded ||
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79 codesign_cert.raw.len <= 0)
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80 {
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81 ERRORPRINTF ("Certificate size mismatch");
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82 goto done;
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83 }
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84
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85 /* Check that the certificate is exactly the same as the pinned one */
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86 for (dwI = 0; dwI < pCCertContext->cbCertEncoded; dwI++)
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87 {
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88 if (pCCertContext->pbCertEncoded[dwI] != codesign_cert.raw.p[dwI])
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89 {
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90 ERRORPRINTF ("Certificate content mismatch");
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91 goto done;
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92 }
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93 }
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94
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95 retval = true;
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96
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97 done:
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98 x509_crt_free(&codesign_cert);
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99 return retval;
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100 }
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101
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102 bin_verify_result
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103 verify_binary_win(const char *filename, size_t name_len) {
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104 bin_verify_result retval = VerifyUnknownError;
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105 WCHAR *filenameW = NULL;
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106 BOOL result = FALSE;
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107 DWORD dwEncoding = 0,
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108 dwContentType = 0,
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109 dwFormatType = 0,
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110 dwSignerInfoSize = 0;
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111 HCERTSTORE hStore = NULL;
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112 HCRYPTMSG hMsg = NULL;
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113 PCERT_INFO pSignerCert = NULL;
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114 PCCERT_CONTEXT pSignerCertContext = NULL;
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115
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116 if (!filename || name_len > MAX_PATH || strlen(filename) != name_len)
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117 {
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118 ERRORPRINTF ("Invalid parameters\n");
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119 return VerifyUnknownError;
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120 }
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121
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122 filenameW = utf8_to_wchar(filename, name_len);
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123
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124 result = CryptQueryObject (CERT_QUERY_OBJECT_FILE,
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125 filenameW,
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126 CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
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127 CERT_QUERY_FORMAT_FLAG_BINARY,
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128 0,
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129 &dwEncoding,
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130 &dwContentType,
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131 &dwFormatType,
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132 &hStore,
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133 &hMsg,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
134 NULL);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
135
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
136 if (!result || !hMsg)
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
137 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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138 PRINTLASTERROR ("Failed to query crypto object");
586
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
Andre Heinecke <aheinecke@intevation.de>
parents: 579
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139 retval = VerifyReadFailed;
579
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Andre Heinecke <aheinecke@intevation.de>
parents:
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140 goto done;
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Andre Heinecke <aheinecke@intevation.de>
parents:
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141 }
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Andre Heinecke <aheinecke@intevation.de>
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142
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Andre Heinecke <aheinecke@intevation.de>
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143 /* Get the cert info so that we can look up the signer in the store later */
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
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144 if (CryptMsgGetParam(hMsg,
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Andre Heinecke <aheinecke@intevation.de>
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diff changeset
145 CMSG_SIGNER_CERT_INFO_PARAM,
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
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146 0,
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Andre Heinecke <aheinecke@intevation.de>
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147 NULL,
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Andre Heinecke <aheinecke@intevation.de>
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148 &dwSignerInfoSize) && dwSignerInfoSize > 0)
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Andre Heinecke <aheinecke@intevation.de>
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149 {
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Andre Heinecke <aheinecke@intevation.de>
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150 pSignerCert = xmalloc (dwSignerInfoSize);
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Andre Heinecke <aheinecke@intevation.de>
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151 }
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Andre Heinecke <aheinecke@intevation.de>
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152 else
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Andre Heinecke <aheinecke@intevation.de>
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153 {
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Andre Heinecke <aheinecke@intevation.de>
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154 ERRORPRINTF ("Failed to get signer cert size.");
586
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
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155 retval = VerifyUnknownError;
579
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156 goto done;
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Andre Heinecke <aheinecke@intevation.de>
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157 }
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Andre Heinecke <aheinecke@intevation.de>
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158
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Andre Heinecke <aheinecke@intevation.de>
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159 if (!(CryptMsgGetParam(hMsg,
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Andre Heinecke <aheinecke@intevation.de>
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160 CMSG_SIGNER_CERT_INFO_PARAM,
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Andre Heinecke <aheinecke@intevation.de>
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161 0,
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Andre Heinecke <aheinecke@intevation.de>
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162 pSignerCert,
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Andre Heinecke <aheinecke@intevation.de>
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163 &dwSignerInfoSize)))
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
164 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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165 ERRORPRINTF ("Failed to get signer cert.");
586
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
Andre Heinecke <aheinecke@intevation.de>
parents: 579
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166 retval = VerifyUnknownError;
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
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167 goto done;
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Andre Heinecke <aheinecke@intevation.de>
parents:
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168 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
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169
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Andre Heinecke <aheinecke@intevation.de>
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170 pSignerCertContext = CertGetSubjectCertificateFromStore(
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
171 hStore,
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
172 PKCS_7_ASN_ENCODING | X509_ASN_ENCODING,
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
173 pSignerCert);
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Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
174
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
175 if (!pSignerCertContext)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
176 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
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diff changeset
177 ERRORPRINTF ("Failed to find signer cert in store.");
586
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
Andre Heinecke <aheinecke@intevation.de>
parents: 579
diff changeset
178 retval = VerifyUnknownError;
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
179 goto done;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
180 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
181
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
182 /* Verify that the signature is actually valid */
629
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
183 if(!CryptMsgControl(hMsg,
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
184 0,
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
185 CMSG_CTRL_VERIFY_SIGNATURE,
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
186 pSignerCertContext->pCertInfo))
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
187 {
629
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
188 ERRORPRINTF ("The signature is invalid. \n");
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
189 retval = VerifyInvalidSignature;
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
190 syslog_error_printf ("Software update embedded signature is invalid.");
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
191 goto done;
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
192 }
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
193
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
194 if(check_certificate(pSignerCertContext))
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
195 {
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
196 DEBUGPRINTF ("Valid signature with pinned certificate.");
586
ecfd77751daf Disambiguate enumerator values and add portable wrapper.
Andre Heinecke <aheinecke@intevation.de>
parents: 579
diff changeset
197 retval = VerifyValid;
629
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
198 goto done;
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
199 }
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
200 else
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
201 {
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
202 ERRORPRINTF ("Certificate mismatch. \n");
637
be30d50bc4f0 Add remaining tests to check binverify functionality
Andre Heinecke <andre.heinecke@intevation.de>
parents: 629
diff changeset
203 retval = VerifyInvalidCertificate;
629
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
204 syslog_error_printf ("Software update embedded signature "
facb13c578f1 Add certificate pinning to verify_binary_win
Andre Heinecke <andre.heinecke@intevation.de>
parents: 591
diff changeset
205 "created with wrong certificate.");
579
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
206 goto done;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
207 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
208
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
209 done:
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
210 xfree(filenameW);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
211 xfree(pSignerCert);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
212
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
213 if(pSignerCertContext)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
214 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
215 CertFreeCertificateContext(pSignerCertContext);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
216 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
217 if (hStore)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
218 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
219 CertCloseStore(hStore, 0);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
220 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
221 if (hMsg)
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
222 {
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
223 CryptMsgClose(hMsg);
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
224 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
225 return retval;
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
226 }
f4ce4eef3b38 Implement PKCS#7 embedded signature verfification for windows
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
227 #endif /* WIN32 */

http://wald.intevation.org/projects/trustbridge/