网络安全基础课程设计

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211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，对输入的明文可以进行

2、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 dialo

3、g 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_jingga

4、o.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/2-150/2

5、,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 dialog

6、_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,label_

7、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_d;bu

8、tton 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_mingwen

9、,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;pane

10、l 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=new pan

11、el();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_q.se

12、tbounds(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(10,10,

13、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(labe

14、l_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);/框架可选择的

15、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_kexuan_

16、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.setb

17、ounds(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.setboun

18、ds(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.setbounds

19、(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.add(l

20、abel_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.setb

21、ounds(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_gongyao.

22、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.sete

23、ditable(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);text

24、field_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_jiami_mi

25、ngwen=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_miwe

26、n);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(button_ji

27、ami);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=new t

28、extfield();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();panel_j

29、iemi.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.getscreensize();s

30、etbounds(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();lo

31、ng_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(true);l

32、ong_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);string_q=

33、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;long

34、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;string_jiami_miwen=long.t