private void button2_Click(object sender, EventArgs e)
{
String fileName = textBox1.Text;
if (File.Exists(fileName))
{
FileStream fs = new FileStream(fileName, FileMode.Open);
byte[] r = new byte[fs.Length];
fs.Read(r, 0, (int)fs.Length);
fs.Close();
ByteBuffer bout = new ByteBuffer();
int i = 0;
bool xors = false;
for (i = 0; i < r.Length; i++)
{
if (r[i] == 0x2f && r[i + 1] == 0x30 && r[i + 2] == 0xee && r[i + 3] == 0x1f)
{
xors = true;
break;
}
}
if (xors)
{
bout.Put(Encoding.ASCII.GetBytes("GMS"));
bout.Put(0x01);
bout.PutIntG(0x0a);
bout.PutIntG(0x02);
bout.PutChar((char)0x00);
bout.PutIntG(0x01);
for (int j = i; j < r.Length; j++)
{
bout.Put((byte)(r[j] ^ 0xff));
}
File.Move(fileName, fileName + ".bak");
FileStream fo = new FileStream(fileName, FileMode.Create);
byte[] t1 = bout.ToByteArray();
HexUtility.Replace(ref t1, Encoding.ASCII.GetBytes("CMG="), Encoding.ASCII.GetBytes("CMG."));
HexUtility.Replace(ref t1, Encoding.ASCII.GetBytes("DPB="), Encoding.ASCII.GetBytes("DPB."));
fo.Write(t1, 0, t1.Length);
fo.Flush();
fo.Close();
}
else
{
if (MessageBox.Show("文件未加密！是否尝试移除密码？", "提示", MessageBoxButtons.YesNo) == System.Windows.Forms.DialogResult.Yes)
{
button3_Click(null, null);
}
}
}
}
private void button3_Click(object sender, EventArgs e)
{
String fileName = textBox1.Text;
if (!File.Exists(fileName))
{
return;
}
FileStream fs = new FileStream(fileName, FileMode.Open);
byte[] r = new byte[fs.Length];
fs.Read(r, 0, (int)fs.Length);
fs.Close();
File.Move(fileName, fileName + ".bak");
FileStream fo = new FileStream(fileName, FileMode.Create);
HexUtility.Replace(ref r, Encoding.ASCII.GetBytes("CMG="), Encoding.ASCII.GetBytes("CMG."));
HexUtility.Replace(ref r, Encoding.ASCII.GetBytes("DPB="), Encoding.ASCII.GetBytes("DPB."));
fo.Write(r, 0, r.Length);
fo.Flush();
fo.Close();
MessageBox.Show("密码已移除！");
}