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); } }