[DllImport("Crypt32.dll", SetLastError = true)]
public static extern bool CryptVerifyMessageSignature(
ref CRYPT_VERIFY_MESSAGE_PARA pVerifyPara,
uint dwSignerIndex,
byte[] pbSignedBlob,
uint cbSignedBlob,
byte[] pbDecoded,
ref uint pcbDecoded,
IntPtr ppSignerCert
);