Ok so at this point I've figured out many of the other issues I was having. Now upon attempting to decrypt the file, I receive no exceptions, however the data is not decrypted properly....it goes through the entire operation without throwing an exception, until I attempt to access the XML document via the combo box again after decrypting. At which time this error is thrown:
Unexpected end of file has occurred. The following elements are not closed: Account. Line 12, position 10. when I open the file in a web browser it only has like 1 half of an XML Node. What happened?
public partial class Form1 : Form
{
public string fileName = "passfile.xml";
public DataSet ds = new DataSet("Account List");
public DataTable accounts = new DataTable("Accounts");
public Form1()
{
InitializeComponent();
accountGroupsBox.Enabled = false;
menuStrip1.Enabled = false;
button2.Enabled = false;
Types type = new Types();
this.accountGroupsBox.Items.AddRange(type.accountTypes);
accounts.Columns.AddRange(new DataColumn[] {
new DataColumn("Username"),
new DataColumn("Password"),
new DataColumn("Description")});
dataGridView1.DataSource = accounts;
}
private void addNewPasswordToolStripMenuItem_Click(object sender, EventArgs e)
{
Form2 addAccount = new Form2(this);
addAccount.Show();
}
private void S_Click(object sender, EventArgs e)
{ //Need to add some code to check for password correctness, for now just unlock the interface
accountGroupsBox.Enabled = true;
menuStrip1.Enabled = true;
button2.Enabled = true;
label2.Text = "Interface Unlocked";
}
private void accountGroupsBox_SelectedIndexChanged(object sender, EventArgs e)
{ //Display the accounts on the datagrid
accounts.Clear();
XmlDocument doc = new XmlDocument();
doc.Load(fileName);
foreach (XmlNode node in doc.GetElementsByTagName("Account"))
{
if (node["AccountType"].InnerText == accountGroupsBox.SelectedItem.ToString())
{
DataRow row = accounts.Rows.Add(
node["Username"].InnerText,
node["Password"].InnerText,
node["Description"].InnerText);
}
}
}
public void Encrypt()
{
string temp = Path.GetTempFileName();
string path = System.IO.Path.GetDirectoryName(Application.ExecutablePath);
byte[] pword = Encoding.UTF8.GetBytes(textBox1.Text);
byte[] hash = SHA256.Create().ComputeHash(pword);
byte[] iv = MD5.Create().ComputeHash(pword);
byte[] key = hash;
using(FileStream fsInput = new FileStream(fileName, FileMode.Open, FileAccess.Read))
using(SymmetricAlgorithm alg = Aes.Create())
using(ICryptoTransform enc = alg.CreateEncryptor(key, iv))
using (FileStream fsOutput = new FileStream(temp, FileMode.Create, FileAccess.Write))
using (CryptoStream cs = new CryptoStream(fsOutput, enc, CryptoStreamMode.Write))
{
try
{
byte[] byteInput = new byte[fsInput.Length - 1];
fsInput.Read(byteInput, 0, byteInput.Length);
cs.Write(byteInput, 0, byteInput.Length);
FileInfo old = new FileInfo(fileName);
FileInfo newer = new FileInfo(temp);
old.Delete();
newer.MoveTo(Path.Combine(path, fileName));
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString(), "Encryption Error", MessageBoxButtons.OK);
}
}
}
public void Decrypt()
{
byte[] pword = Encoding.UTF8.GetBytes(textBox1.Text);
byte[] hash = SHA256.Create().ComputeHash(pword);
byte[] iv = MD5.Create().ComputeHash(pword);
byte[] key = hash;
using(FileStream fsInput = new FileStream(fileName, FileMode.Open, FileAccess.Read))
using(SymmetricAlgorithm alg = Aes.Create())
using(ICryptoTransform enc = alg.CreateDecryptor(key, iv))
using (CryptoStream cs = new CryptoStream(fsInput, enc, CryptoStreamMode.Read))
{
StreamWriter sw = new StreamWriter(temp);
sw.Write(new StreamReader(cs).ReadToEnd());
sw.Flush();
sw.Close();
}
FileInfo encrypted = new FileInfo(fileName);
FileInfo decrypted = new FileInfo(temp);
encrypted.Delete();
decrypted.MoveTo(Path.Combine(path, fileName);