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我正在尝试使用该WinVerifyTrust功能来验证 msi 的签名。

虽然这适用于文件系统上的文件,但我无法让它与内存 blob 一起使用。
我的示例显示问题的基础是微软的示例程序

BOOL VerifyEmbeddedSignature(LPCWSTR pwszSourceFile)
{
   std::basic_ifstream<BYTE> file(pwszSourceFile, std::ios::binary);
  std::vector<BYTE> data((std::istreambuf_iterator<BYTE>(file)),std::istreambuf_iterator<BYTE>());

  LONG lStatus;

  /*
  // this works
  WINTRUST_FILE_INFO FileData;
  memset(&FileData, 0, sizeof(FileData));
  FileData.cbStruct = sizeof(WINTRUST_FILE_INFO);
  FileData.pcwszFilePath = pwszSourceFile;
  FileData.hFile = NULL;
  FileData.pgKnownSubject = NULL;
  */
  WINTRUST_BLOB_INFO FileData{};
  memset(&FileData, 0, sizeof(FileData));
  FileData.cbStruct = sizeof(WINTRUST_BLOB_INFO);
  FileData.gSubject = WIN_TRUST_SUBJTYPE_RAW_FILE;
  FileData.cbMemObject = static_cast<DWORD>(data.size());
  FileData.pbMemObject = data.data();

  GUID WVTPolicyGUID = WINTRUST_ACTION_GENERIC_VERIFY_V2;
  WINTRUST_DATA WinTrustData;
  memset(&WinTrustData, 0, sizeof(WinTrustData));
  WinTrustData.cbStruct = sizeof(WinTrustData);
  WinTrustData.pPolicyCallbackData = NULL;
  WinTrustData.pSIPClientData = NULL;
  WinTrustData.dwUIChoice = WTD_UI_NONE;
  WinTrustData.fdwRevocationChecks = WTD_REVOKE_NONE;
  //WinTrustData.dwUnionChoice = WTD_CHOICE_FILE; -- works
  WinTrustData.dwUnionChoice = WTD_CHOICE_BLOB;
  WinTrustData.dwStateAction = WTD_STATEACTION_VERIFY;
  WinTrustData.hWVTStateData = NULL;
  WinTrustData.pwszURLReference = NULL;
  WinTrustData.dwUIContext = 0;
  WinTrustData.pBlob = &FileData;
  //WinTrustData.pFile = &FileData; -- works

  lStatus = WinVerifyTrust(
    NULL,
    &WVTPolicyGUID,
    &WinTrustData);

  WinTrustData.dwStateAction = WTD_STATEACTION_CLOSE;
  WinVerifyTrust(
    NULL,
    &WVTPolicyGUID,
    &WinTrustData);

  return lStatus == ERROR_SUCCESS;
}

在上面的例子中使用了WINTRUST_FILE_INFO作品,但WINTRUST_BLOB_INFO没有。我使用内存 blob 得到的错误始终是TRUST_E_PROVIDER_UNKNOWN.

我认为问题可能是WIN_TRUST_SUBJTYPE_RAW_FILE主题类型,但我不知道应该将哪个用于 msi 文件。我想知道是否可以使用 msi 文件的内存 blob 进行符号检查。

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1 回答 1

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WIN_TRUST_SUBJTYPE_RAW_FILE不是合适的主题 GUID 。您可以 该函数CryptSIPRetrieveSubjectGuid根据指定文件中的标头信息检索 GUID。

于 2020-07-08T01:19:51.790 回答