破解串口协议方法文件（接口协议如何破解）

可以通过串口测试工具破解终端设备的串口端通信协议吗

需要知道协议的格式，最好找一个能够解析协议数据的软件，例如格西烽火软件等，在连续测试中，可以减少计算其中特定数据的时间。

如何应用.dll文件破解虚拟串口

网上搜索一番，主要有VSPM和VSPD，前者是在WIN7前使用稳定，后者在WIN7中使用稳定。我的电脑是WIN7_64的，所以选用了VSPD7。于是下了个VSPD7.1的安装包，安装完成后，利用软件界面就可以创建相应的虚拟COM口了。具体如何使用，可以参看这篇文章《虚拟串口VSPD的使用方法》。记住一点，VSPD的COM通信是成对的，一个用于接收数据，一个用于发送数据。

有了虚拟COM口后，就是写一个DEMO进行测试。具体可以参看这篇文件章《win7系统下用vspd软件进行串口编程实例》。

当虚拟COM口可以实现通讯之后，就想着我们的程序是依赖于这个VSPD安装包的，那如果我们是否可以不依赖呢？有两种方案：

方案一：自己写一个虚拟COM的驱动，然后里面实现。有兴趣的可以参看该文《开发虚拟串口驱动程序》。

方案二：VSPD安装包是一个安装程序，为了实现虚拟COM，必然会有相应的驱动。如果我们能够找到这个驱动并安装，之后用相应的接口来调用，或是可行。

方案一想了，但自认还没有这个能耐，于是果断放弃，退而选方案二。那么方案二要实现，首先要解决的问题是接口的调用，因为驱动程序即使不能做到自己安装，但还是可以通过VSPD安装包的安装来解决，那么VSPD中有没有提供这样的接口呢？

查看VSPD的用户手册(User Manual)，里面果然有相应的接口(在Using serial port driver in your program下的Functions中)，于是有C#写了相应的调用，下面是代码。

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

//Add

using System.Runtime.InteropServices;

namespace Anser.U2Simulator.Model

{

public class VSPD

{

//[DllImport("VSPDCTL.dll", EntryPoint = "CreatePair", CallingConvention = CallingConvention.StdCall, CharSet = CharSet.Auto)]

//public static extern bool CreatePair(byte[] comName1, byte[] comName2);

/// summary

/// CreatePair creates a pair of virtual serial ports with given names.

/// It accepts two null-terminated strings determining which ports should be created as input.

/// For example, "COM5" and "COM6".

/// /summary

/// param name="comName1"A null-terminated string that defines the name of the first port in a pair/param

/// param name="comName2"A null-terminated string that defines the name of the second port in a pair/param

/// returnsCreatePair returns TRUE if virtual serial pair was created successfully and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool CreatePair(string comName1, string comName2);

/// summary

/// DeletePair deletes a pair of virtual serial ports with a given name.

/// As input it takes name of any virtual serial port in a pair.

/// For example, if you want to remove pair named "COM5"-"COM6",

/// you can pass either "COM5" or "COM6" as argument to DeletePair function.

/// /summary

/// param name="comName" A null-terminated string that defines one of the two port names in a pair you want to delete /param

/// returnsDeletePair returns TRUE if virtual serial pair was successfully deleted and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool DeletePair(string comName);

/// summary

/// DeleteAll deletes all virtual serial ports currently present in a system. It accepts no arguments at input.

/// /summary

/// returnsDeleteAll returns TRUE if all virtual serial pairs were successfully deleted and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool DeleteAll();

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrateName(string comName, bool isStrictBaudrate);

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrateHandle(IntPtr handle, bool isStrictBaudrate);

/// summary

/// SetStrictBaudrate enables/disables full baudrate emulation,

/// needs the name of one of the paired virtual ports and boolean parameter

/// that defines if strict baudrate emulation should be enabled or not.

/// /summary

/// param name="comName"A null-terminated string that defines one of the two port names in a pair /param

/// param name="isStrictBaudrate"A boolean variable which should be TRUE

/// if you want to enable strict baudrate emulation and FALSE if you want to disable it/param

/// returnsSetStrictBaudrate returns TRUE if strict baudrate emulation was successfully enabled and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool SetStrictBaudrate(string comName, bool isStrictBaudrate);

/// summary

/// SetBreak enables/disables line break emulation in virtual serial ports.

/// /summary

/// param name="comName"A null-terminated string that defines one of the two port names in a pair/param

/// param name="isBreak" A boolean variable should be TRUE if you want to emulate connection break and FALSE if you want to re-establish it /param

/// returnsSetBreak returns TRUE if line break emulation was successfully enabled and FALSE otherwise./returns

[DllImport("vspdctl.dll")]

public static extern bool SetBreak(string comName, bool isBreak);

/// summary

/// QueryBus: QueryBus sends request to get complete information from the virtual serial bus installed by VSPD.

/// /summary

/// param name="inBufferPtr"A pointer to VSBUS_QUERY or VSBUS_QUERY_EX structures.

/// If you want to get information about all current virtual serial ports

/// then use VSBUS_QUERY structure

/// and if you want to get extended information

/// about single virtual serial pair then use VSBUS_QUERY_EX structure./param

/// param name="inBufferSize"/param

/// param name="outBufferPtr"/param

/// param name="outBufferSize"A pointer to either PORT_INFORMATION or PORT_INFORMATION_EX structures list.

/// If you have used VSBUS_QUERY than you should get PORT_INFORMATION list

/// and if you used VSBUS_QUERY_EX then you should get PORT_INFORMATION_EX./param

/// returns/returns

[DllImport("vspdctl.dll")]

public static extern bool QueryBus(IntPtr inBufferPtr, long inBufferSize, IntPtr outBufferPtr, long outBufferSize);

/// summary

/// SetWiring sets custom signal lines wiring (pinout).

/// /summary

/// param name="comName"A null-terminated string that defines one of the two port names in a pair /param

/// param name="bufferPtr"A pointer to VSERIAL_WIRING structure /param

/// param name="bufferSize"Size of Buffer parameter in bytes /param

/// returnsSetWiring returns TRUE if signal lines wiring was created successfully and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool SetWiring(string comName, IntPtr bufferPtr, long bufferSize);

/// summary

/// SetAccessList restricts access to created virtual serial ports for various applications.

/// /summary

/// param name="comName" A null-terminated string that defines one of the two port names in a pair /param

/// param name="bufferPtr"A pointer to PROGRAM_ACCESS array /param

/// param name="bufferSize"Size of Buffer parameter in bytes /param

/// returnsSetAccessList returns TRUE if port access list was created successfully and FALSE otherwise/returns

[DllImport("vspdctl.dll")]

public static extern bool SetAccessList(string comName, IntPtr bufferPtr, long bufferSize);

//[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Ansi,Pack=1)]

public struct _VSBUS_QUERY

{

/// summary

/// VSBUS_QUERY structure size

/// /summary

ulong Size;

/// summary

/// Has QUERYTYPE_PORTS = 1 value. Can be extended in the future.

/// /summary

ulong QueryType;

};

private const int MAX_PORTNAME_LEN = 6;

public struct _VSBUS_QUERY_EX

{

/// summary

/// VSBUS_QUERY_EX structure size

/// /summary

ulong Size;

/// summary

/// 1:query all virtual ports.

/// 2:query particular virtual pair

/// 3:query particular virtual pair; name of the application, which created the port, is returned.

/// /summary

ulong QueryType;

/// summary

/// Unicode name of any port in the pair you want to delete.

/// For instance, if "COM6-COM7" virtual serial ports pair was created,

/// then to remove it, PortName's value should be COM6 or COM7.

/// /summary

[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_PORTNAME_LEN)]

string PortName;

}

}

}

串口通信简易加密算法的破解

可以.

如果算法很简单,找寻规律并不是很难.

如果复杂一些,可以试试一些常用的算法来解密.需要一些密码知识.

如果使用了密匙,不可逆算法等难以解密的方法,在短时间内是绝对不可能的了.

希望对你有所帮助!

如何破解485通讯协议

破解485通讯协议：此协议定义了一个控制器能认识使用的消息结构,而不管它们是经过何种网络进行通信的。

485是一个物理层协议，无需软件，只要写串口通信软件即可，可以在pc上用rs232转rs485转接头进行通信。通信软件可以用通用的串口软件，如格西烽火、sscom等进行。

主要特性：

典型的串行通信标准是RS232和RS485，它们定义了电压，阻抗等，但不对软件协议给予定义，区别于RS232， RS485的特性包括：RS-485的电气特性：逻辑‘’1‘’以两线间的电压差为+（2—6）V表示；逻辑‘’0‘’以两线间的电压差为-（2—6）V表示。

接口信号电平比RS-232-C降低了，就不易损坏接口电路的芯片， 且该电平与TTL电平兼容，可方便与TTL 电路连接。