private byte[] CheckKey3DB(string filePath, string MasterPwd)
{
try
{
Converts conv = new Converts();
ErrorHandle eh = new ErrorHandle();
Asn1Der asn = new Asn1Der();
BerkeleyDB db = new BerkeleyDB(Path.Combine(filePath, "key3.db"));
// Verify MasterPassword
PasswordCheck pwdCheck = new PasswordCheck((from p in db.Keys
where p.Key.Equals("password-check")
select p.Value).FirstOrDefault().Replace("-", ""));
string GlobalSalt = (from p in db.Keys
where p.Key.Equals("global-salt")
select p.Value).FirstOrDefault().Replace("-", "");
MozillaPBE CheckPwd = new MozillaPBE(conv.ConvertHexStringToByteArray(GlobalSalt), Encoding.ASCII.GetBytes(MasterPwd), conv.ConvertHexStringToByteArray(pwdCheck.EntrySalt));
CheckPwd.Compute();
string decryptedPwdChk = TripleDESHelper.DESCBCDecryptor(CheckPwd.Key, CheckPwd.IV, conv.ConvertHexStringToByteArray(pwdCheck.Passwordcheck));
if (!decryptedPwdChk.StartsWith("password-check"))
{
eh.ErrorFunc("Master password is wrong !");
return(null);
}
// Get private key
string f81 = (from p in db.Keys
where !p.Key.Equals("global-salt") &&
!p.Key.Equals("Version") &&
!p.Key.Equals("password-check")
select p.Value).FirstOrDefault().Replace("-", "");
Asn1DerObject f800001 = asn.Parse(conv.ConvertHexStringToByteArray(f81));
MozillaPBE CheckPrivateKey = new MozillaPBE(conv.ConvertHexStringToByteArray(GlobalSalt), Encoding.ASCII.GetBytes(MasterPwd), f800001.objects[0].objects[0].objects[1].objects[0].Data);
CheckPrivateKey.Compute();
byte[] decryptF800001 = TripleDESHelper.DESCBCDecryptorByte(CheckPrivateKey.Key, CheckPrivateKey.IV, f800001.objects[0].objects[1].Data);
Asn1DerObject f800001deriv1 = asn.Parse(decryptF800001);
Asn1DerObject f800001deriv2 = asn.Parse(f800001deriv1.objects[0].objects[2].Data);
byte[] privateKey = new byte[24];
if (f800001deriv2.objects[0].objects[3].Data.Length > 24)
{
Array.Copy(f800001deriv2.objects[0].objects[3].Data, f800001deriv2.objects[0].objects[3].Data.Length - 24, privateKey, 0, 24);
}
else
{
privateKey = f800001deriv2.objects[0].objects[3].Data;
}
return(privateKey);
}
catch (Exception ex)
{
return(null);
}
}
