private void btnRead_Click(object sender, EventArgs e)
{
byte[] imageBytes;
try
{
imageBytes = File.ReadAllBytes(txtFilePath.Text);
}
catch
{
MessageBox.Show("Unable to read file");
return;
}
X509Certificate2 certificate = null;
try
{
List <byte[]> certificates;
if (SecondaryExecutableHeader.IsSecondaryExecutable(imageBytes))
{
certificates = SecondaryExecutableHelper.ExtractCertificates(imageBytes);
}
else
{
certificates = ApplicationExecutableHelper.ExtractCertificates(imageBytes);
}
certificate = new X509Certificate2(certificates[0]);
}
catch
{
txtSoftwareID.Text = "Error";
txtHardwareID.Text = "Error";
}
if (certificate != null)
{
txtSoftwareID.Text = GetByteArrayString(ReadHexPropertyFromCertificate(certificate, "OU=01", "SW_ID"));
txtHardwareID.Text = GetByteArrayString(ReadHexPropertyFromCertificate(certificate, "OU=02", "HW_ID"));
}
try
{
byte[] rootCertificateHash;
if (SecondaryExecutableHeader.IsSecondaryExecutable(imageBytes))
{
rootCertificateHash = SecondaryExecutableVerification.GetRootCertificateHash(imageBytes);
}
else
{
rootCertificateHash = ApplicationExecutableVerification.GetRootCertificateHash(imageBytes);
}
txtOemPKHash.Text = GetByteArrayString(rootCertificateHash);
}
catch
{
txtOemPKHash.Text = "Error";
}
}
private void Verify()
{
byte[] hardwareID = null;
try
{
hardwareID = ConvertHexStringToByteArray(txtHardwareID.Text.Replace(" ", String.Empty));
}
catch
{
}
if (hardwareID == null || hardwareID.Length != 8)
{
MessageBox.Show("Invalid HW_ID");
return;
}
byte[] softwareID = null;
try
{
softwareID = ConvertHexStringToByteArray(txtSoftwareID.Text.Replace(" ", String.Empty));
}
catch
{
}
if (softwareID == null || softwareID.Length != 8)
{
MessageBox.Show("Invalid SW_ID");
return;
}
byte[] oemPKHash = null;
try
{
oemPKHash = ConvertHexStringToByteArray(txtOemPKHash.Text.Replace(" ", String.Empty));
}
catch
{
}
if (oemPKHash == null || (oemPKHash.Length != 20 && oemPKHash.Length != 32))
{
MessageBox.Show("Invalid OEM_PK_HASH");
return;
}
byte[] imageBytes;
try
{
imageBytes = File.ReadAllBytes(txtFilePath.Text);
}
catch
{
MessageBox.Show("Unable to read file");
return;
}
try
{
bool isRootCertificateValid = SecondaryExecutableVerification.VerifyRootCertificateHash(imageBytes, oemPKHash);
lblRootCertificateStatus.Text = isRootCertificateValid ? "OK" : "INVALID";
}
catch
{
lblRootCertificateStatus.Text = "Error";
}
try
{
bool isCertificateStoreValid = SecondaryExecutableVerification.VerifyCertificateStore(imageBytes);
lblCertificateStoreStatus.Text = isCertificateStoreValid ? "OK" : "INVALID";
}
catch
{
lblCertificateStoreStatus.Text = "Error";
}
try
{
bool isImageSignatureValid = SecondaryExecutableVerification.VerifyImageSignature(imageBytes, softwareID, hardwareID);
lblImageSignatureStatus.Text = isImageSignatureValid ? "OK" : "INVALID";
}
catch
{
lblImageSignatureStatus.Text = "Error";
}
}
