C#破解access資料庫密碼方法
// 根據網上經驗和方法用C#做一個破解程式
// 本程式最多取16位密碼
using System.IO;
using System.Windows.Forms;
class Access
{
// 擷取密碼
static string GetPassword(string file)
{ // 未加密的檔案0x42開始至0x61之前的每間隔一位元組的數值
byte[] baseByte = { 0xbe,0xec,0x65,0x9c,0xfe,0x28,0x2b,0x8a,0x6c,0x7b,0xcd,0xdf,0x4f,0x13,0xf7,0xb1, };
byte flagByte = 0x0c; // 標誌 0x62 處的數值
string password = "";
try
{
FileStream fs = File.OpenRead(file);
fs.Seek(0x14, SeekOrigin.Begin);
byte ver = (byte)fs.ReadByte(); // 取得版本, 1為Access2000, 0為Access97
fs.Seek(0x42, SeekOrigin.Begin);
byte[] bs = new byte[33];
if (fs.Read(bs, 0, 33) != 33) return "";
byte flag = (byte)(bs[32] ^ flagByte);
for(int i = 0; i < 16; i++)
{
byte b = (byte)(baseByte^bs[i*2]);
if (i%2==0 && ver==1) b ^= flag; //Access 2000
if (b > 0) password += (char)b;
}
}
catch {}
return password;
}
// 主入口
static void Main()
{
OpenFileDialog f = new OpenFileDialog();
if (f.ShowDialog() != DialogResult.OK) return;
MessageBox.Show("密碼:[" + GetPassword(f.FileName) + "]", "密碼");
}
}
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