设计一个使用rsa算法进行加密解密的系统网络安全基础课程设计.doc

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1、 目录1课程设计简介21.1 课程设计的目的21.2 课程设计内容22课程设计的整体实现过程22.1 流程分析22.2算法实现代码42.3测试与评价183心得体会204参考文献21.21.1课程设计简介1.1 课程设计的目的在数据加密解密算法中，RSA是典型的双密钥体制，目前均在大量使用。通过实验，让我们充分理解和掌握RSA算法的使用。这种加密算法的特点主要是密钥的变化， RSA同时有两把钥匙，公钥与私钥。同时支持数字签名。数字签名的意义在于，对传输过来的数据进行校验。确保数据在传输工程中不被修改。1.2 课程设计内容我们一组设计一个使用RSA算法进行加密解密的系统。并设计操作界面，对输入的明

2、文可以进行加解密以及对指定的文件可以加解密。2课程设计的整体实现过程2.1 流程分析甲方构建密钥对，将公钥公布给乙方，将私钥保留。 甲方使用私钥加密数据，然后用私钥对加密后的数据签名，发送给乙方签名以及加密后的数据；乙方使用公钥、签名来验证待解密数据是否有效，如果有效使用公钥对数据解密。 乙方使用公钥加密数据，向甲方发送经过加密后的数据；甲方获得加密数据，通过私钥解密。2.2算法实现代码package RSA;import java.awt.*;import java.awt.event.*;import java.util.*;/定义对话框类class Rsa_dialog extends

3、Dialog implements ActionListener int message; Panel panel_dialog;Button button_queding;Label label_jinggao;Rsa_dialog(Frame f,String s,boolean b,String jinggao)super(f,s,b);panel_dialog=new Panel(); panel_dialog.setLayout(null);label_jinggao=new Label(jinggao);panel_dialog.add(label_jinggao);label_j

4、inggao.setBounds(2, 2, 145, 40);button_queding=new Button(确定);panel_dialog.add(button_queding);button_queding.setBounds(150/2-80/2,44,80,30);button_queding.addActionListener(this);add(panel_dialog);Toolkit tool=getToolkit();Dimension dim=tool.getScreenSize();setBounds(dim.width/2-120/2,dim.height/2-

5、150/2,150,120);addWindowListener(new WindowAdapter( )public void windowClosing(WindowEvent e)message=-1;setVisible(false););public void actionPerformed(ActionEvent e)if(e.getSource()=button_queding)message=1;setVisible(false);class WindowArea extends Frame implements ActionListener/定义对话框Rsa_dialog d

6、ialog_p,dialog_q,dialog_mingwen_n;/定义选择素数p、qString string_p,string_q;long long_p,long_q;Panel panel_p_q;TextField textfield_p,textfield_q;Label label_p,label_q;/定义O(n)nCA-IOS(799054470);String string_on,string_n;long long_on,long_n;Panel panel_on_n;TextField textfield_on,textfield_n;Label label_on,l

7、abel_n;Button button_on,button_n;/定义可选择的整数ePanel panel_kexuan_e;Label label_kexuan_e;TextArea textarea_kexuan_e;Button button_e;/定义选择ePanel panel_xuanze_e;Label label_xuanze_e;TextField textfield_xuanze_e;/定义dString string_e,string_d;long long_e,long_d;Panel panel_d;Label label_d;TextField textfield

8、_d;Button button_d;/定义公钥Panel panel_gongyao;Label label_gongyao_e,label_gongyao_n;TextField textfield_gongyao_e,textfield_gongyao_n;Button button_gongyao;/定义私钥Panel panel_siyao;Label label_siyao_d,label_siyao_n;TextField textfield_siyao_d,textfield_siyao_n;Button button_siyao;/定义加密long long_jiami_mi

9、ngwen,long_jiami_miwen;String string_jiami_mingwen,string_jiami_miwen;Panel panel_jiami;TextField textfield_jiami_mingwen,textfield_jiami_miwen;Label label_jiami_mingwen,label_jiami_miwen;Button button_jiami;/定义解密long long_jiemi_mingwen,long_jiemi_miwen;String string_jiemi_mingwen,string_jiemi_miwen

10、;Panel panel_jiemi;TextField textfield_jiemi_mingwen,textfield_jiemi_miwen;Label label_jiemi_mingwen,label_jiemi_miwen;Button button_jiemi;WindowArea(String s)super(s);setLayout(null);addWindowListener(new WindowAdapter()public void windowClosing(WindowEvent e)System.exit(0););/框架选择素数p、qpanel_p_q=ne

11、w Panel();panel_p_q.setBounds(30,50,700,50);panel_p_q.setLayout(null);label_p=new Label(选择素数p:);panel_p_q.add(label_p);label_p.setBounds(10, 10, 150, 20);textfield_q=new TextField();panel_p_q.add(textfield_q);textfield_q.setBounds(160,10,75,20);label_q=new Label( 选择素数q:);panel_p_q.add(label_q);label

12、_q.setBounds(245,10,150,20);textfield_p=new TextField();panel_p_q.add(textfield_p);textfield_p.setBounds(405,10,75,20);add(panel_p_q);/框架生成O（n）npanel_on_n=new Panel();panel_on_n.setBounds(30,90,700,70);panel_on_n.setLayout(null);label_on=new Label(O(n):);panel_on_n.add(label_on);label_on.setBounds(1

13、0,10,100,20);textfield_on=new TextField();textfield_on.setEditable(false);panel_on_n.add(textfield_on);textfield_on.setBounds(160,10,75,20);button_on=new Button(生成O（n）);button_on.addActionListener(this);panel_on_n.add(button_on);button_on.setBounds(488,10,110,20);label_n=new Label(n:);panel_on_n.add

14、(label_n);label_n.setBounds(10,40,150,20);textfield_n=new TextField();textfield_n.setEditable(false);panel_on_n.add(textfield_n);textfield_n.setBounds(160,40,75,20);button_n=new Button(生成n);button_n.addActionListener(this);panel_on_n.add(button_n);button_n.setBounds(488,40,110,20);add(panel_on_n);/框

15、架可选择的epanel_kexuan_e=new Panel();panel_kexuan_e.setBounds(30,160,700,100);panel_kexuan_e.setLayout(null);label_kexuan_e=new Label(可供选择的e有：);/label_kexuan_e.setBackground(Color.cyan);panel_kexuan_e.add(label_kexuan_e);label_kexuan_e.setBounds(10,10,150,20);textarea_kexuan_e=new TextArea();textarea_ke

16、xuan_e.setEditable(false);panel_kexuan_e.add(textarea_kexuan_e);textarea_kexuan_e.setBounds(160,10,250,80);button_e=new Button(生成可供选择的e);button_e.addActionListener(this);panel_kexuan_e.add(button_e);button_e.setBounds(488,10,110,20);add(panel_kexuan_e);/框架选择epanel_xuanze_e=new Panel();panel_xuanze_e

17、.setBounds(30,260,700,40);/panel_xuanze_e.setBackground(Color.blue);panel_xuanze_e.setLayout(null);label_xuanze_e=new Label(选择e为：);panel_xuanze_e.add(label_xuanze_e);label_xuanze_e.setBounds(10,10,150,20);textfield_xuanze_e=new TextField();panel_xuanze_e.add(textfield_xuanze_e);textfield_xuanze_e.se

18、tBounds(160,10,75,20);add(panel_xuanze_e);/框架dpanel_d=new Panel();panel_d.setBounds(30,310,700,40);panel_d.setLayout(null);label_d=new Label( d为：);panel_d.add(label_d);label_d.setBounds(10,10,150,20);textfield_d=new TextField();textfield_d.setEditable(false);panel_d.add(textfield_d);textfield_d.setB

19、ounds(160,10,75,20);button_d=new Button(生成d);button_d.addActionListener(this);panel_d.add(button_d);button_d.setBounds(488,10,110,20);add(panel_d);/框架生成公钥KUpanel_gongyao=new Panel();panel_gongyao.setBounds(30,360,700,40);panel_gongyao.setLayout(null);label_gongyao_e=new Label(公钥KU为：e);panel_gongyao.

20、add(label_gongyao_e);label_gongyao_e.setBounds(10,10,150,20);textfield_gongyao_e=new TextField();textfield_gongyao_e.setEditable(false);panel_gongyao.add(textfield_gongyao_e);textfield_gongyao_e.setBounds(160,10,75,20);label_gongyao_n=new Label( n:);panel_gongyao.add(label_gongyao_n);label_gongyao_n

21、.setBounds(238,10,35,20);textfield_gongyao_n=new TextField();textfield_gongyao_n.setEditable(false);panel_gongyao.add(textfield_gongyao_n);textfield_gongyao_n.setBounds(280,10,95,20);button_gongyao=new Button(生成公钥KU);button_gongyao.addActionListener(this);panel_gongyao.add(button_gongyao);button_gon

22、gyao.setBounds(488,10,110,20);add(panel_gongyao);/框架生成私钥KUpanel_siyao=new Panel();panel_siyao.setBounds(30,410,700,40);panel_siyao.setLayout(null);label_siyao_d=new Label(私钥KR为：d);panel_siyao.add(label_siyao_d);label_siyao_d.setBounds(10,10,150,20);textfield_siyao_d=new TextField();textfield_siyao_d

23、.setEditable(false);panel_siyao.add(textfield_siyao_d);textfield_siyao_d.setBounds(160,10,75,20);label_siyao_n=new Label( n:);panel_siyao.add(label_siyao_n);label_siyao_n.setBounds(238,10,35,20);textfield_siyao_n=new TextField();textfield_siyao_n.setEditable(false);panel_siyao.add(textfield_siyao_n)

24、;textfield_siyao_n.setBounds(280,10,95,20);button_siyao=new Button(生成私钥KR);button_siyao.addActionListener(this);panel_siyao.add(button_siyao);button_siyao.setBounds(488,10,110,20);add(panel_siyao);/框架加密panel_jiami=new Panel();panel_jiami.setBounds(30,460,700,70);panel_jiami.setLayout(null);label_jia

25、mi_mingwen=new Label(输入明文:);panel_jiami.add(label_jiami_mingwen);label_jiami_mingwen.setBounds(30,10,75,20);textfield_jiami_mingwen=new TextField();panel_jiami.add(textfield_jiami_mingwen);textfield_jiami_mingwen.setBounds(160,10,215,20);label_jiami_miwen=new Label(输出密文:);panel_jiami.add(label_jiami

26、_miwen);label_jiami_miwen.setBounds(30,40,75,20);textfield_jiami_miwen=new TextField();textfield_jiami_miwen.setEditable(false);panel_jiami.add(textfield_jiami_miwen);textfield_jiami_miwen.setBounds(160,40,215,20);button_jiami=new Button(加 密);button_jiami.addActionListener(this);panel_jiami.add(butt

27、on_jiami);button_jiami.setBounds(488,10,110,20);add(panel_jiami);/框架解密panel_jiemi=new Panel();panel_jiemi.setBounds(30,540,700,70);panel_jiemi.setLayout(null);label_jiemi_mingwen=new Label(输出明文:);panel_jiemi.add(label_jiemi_mingwen);label_jiemi_mingwen.setBounds(30,10,75,20);textfield_jiemi_mingwen=

28、new TextField();textfield_jiemi_mingwen.setEditable(false);panel_jiemi.add(textfield_jiemi_mingwen);textfield_jiemi_mingwen.setBounds(160,10,215,20);label_jiemi_miwen=new Label(输入密文:);panel_jiemi.add(label_jiemi_miwen);label_jiemi_miwen.setBounds(30,40,75,20);textfield_jiemi_miwen=new TextField();pa

29、nel_jiemi.add(textfield_jiemi_miwen);textfield_jiemi_miwen.setBounds(160,40,215,20);button_jiemi=new Button(解 密);button_jiemi.addActionListener(this);panel_jiemi.add(button_jiemi);button_jiemi.setBounds(488,10,110,20);add(panel_jiemi);/总的外框架尺寸Toolkit tool=getToolkit();Dimension dim=tool.getScreenSiz

30、e();setBounds(dim.width/2-700/2,dim.height/2-620/2,700,620);setVisible(true);validate();public int panduan_sushu(long n)long i;for(i=2;in/2;i+)if(n%i=0)return 0;return 1;public void actionPerformed(ActionEvent e)String string_lingshi_e; / 生成O(n)if(e.getSource()=button_on)string_p=textfield_p.getText

31、();long_p=Integer.parseInt(string_p);if(panduan_sushu(long_p)=0)dialog_p=new Rsa_dialog(this,警告！!,true, q必须为素数);dialog_p.setVisible(true);string_q=textfield_q.getText();long_q=Integer.parseInt(string_q);if(panduan_sushu(long_q)=0)dialog_q=new Rsa_dialog(this,警告！!,true, p必须为素数);dialog_q.setVisible(tr

32、ue);long_on=(long_p-1)*(long_q-1);string_on=Long.toString(long_on);textfield_on.setText(string_on); /生成nif(e.getSource()=button_n)string_p=textfield_p.getText();long_p=Integer.parseInt(string_p);if(panduan_sushu(long_p)=0)dialog_p=new Rsa_dialog(this,警告！!,true, q必须为素数);dialog_p.setVisible(true);stri

33、ng_q=textfield_q.getText();long_q=Integer.parseInt(string_q);if(panduan_sushu(long_q)=0)dialog_q=new Rsa_dialog(this,警告！!,true, p必须为素数);dialog_q.setVisible(true);long_n=(long_p)*(long_q);string_n=Long.toString(long_n);textfield_n.setText(string_n); /生成可供选择的eif(e.getSource()=button_e)String string_e;

34、long long_lingshi_e,counter=0;for(long_lingshi_e=2;long_lingshi_elong_on;long_lingshi_e+)for(int i=2;ilong_n)dialog_mingwen_n=new Rsa_dialog(this,警告！!,true, 明文必须小于n!);dialog_mingwen_n.setVisible(true);long lingshibl=long_jiami_mingwen;for(int i=1;ilong_n)lingshibl%=long_n;long_jiami_miwen=lingshibl;

35、string_jiami_miwen=Long.toString(long_jiami_miwen);textfield_jiami_miwen.setText(string_jiami_miwen); /解密模块if(e.getSource()=button_jiemi)string_jiemi_miwen=textfield_jiemi_miwen.getText();long_jiemi_miwen=Integer.parseInt(string_jiemi_miwen);long lingshibl2=long_jiemi_miwen;for(int i=1;ilong_n)lings

36、hibl2%=long_n;long_jiemi_mingwen=lingshibl2;System.out.println(long_jiemi_mingwen=+long_jiemi_mingwen);string_jiemi_mingwen=Long.toString(long_jiemi_mingwen);textfield_jiemi_mingwen.setText(string_jiemi_mingwen);public class RSA public static void main(String args)WindowArea a=new WindowArea(RSA加密算法

37、);2.3测试与评价上述RSA非对称加密解密源代码是利用JAVA软件实现的,输入代码后运行会出现如图一所示样式。1.在其“选择素数”栏中输入任意2个素数，然后点右边的“生成”，一直点下去；2.在“输入明文”栏中输入要加密的明文，点击“加密”，就会在“输出密文”栏中显示密文；3.在“输入密文”栏中输入要解密的密文，点击“解密”，就会在“输出明文”栏中显示明文。图二是输入素数7、11后，按上述步骤操作完后的图图一图二3心得体会通过这次课程设计实验使我们对RSA算法的原理有了深刻的理解，也对非对称加解密有了一定的认识。实验刚开始我们小组对这个算法只是有点初步了解，后来通过这一周的学习与实验，我们可以说是有了质的变化。同时，这次实验使我对团队合作有了很好的好感，团结就是力量，团队合作使我们能更快更好的完成了本次实验。4参考文献1.Willian Stallings著，孟庆树、王丽娜等译.密码编码学与网络安全.电子工业出版社，20092.刘文涛.网络安全编程技术与实例.机械工业出版社,20083.(美