《密码学》实验报告

《密码学》实验报告学号：姓名：20第21页共21页实验一：DES加密算法实验目的验证DES加密算法。实验任务运行加密程序，观察加密结果。实验流程打开100行DES加密算法文件夹，运行WjcDesTest.dsw，执行程序。实验结果实验代码#include"memory.h"#include"WjcDes.h"////////////////////////////////////////////////////////////////////////////initialpermutationIPconststaticcharIP_Table[64]={ 58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4, 62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8, 57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3, 61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7};//finalpermutationIP^-1conststaticcharIPR_Table[64]={ 40,8,48,16,56,24,64,32,39,7,47,15,55,23,63,31, 38,6,46,14,54,22,62,30,37,5,45,13,53,21,61,29, 36,4,44,12,52,20,60,28,35,3,43,11,51,19,59,27, 34,2,42,10,50,18,58,26,33,1,41,9,49,17,57,25};//expansionoperationmatrixstaticconstcharE_Table[48]={ 32,1,2,3,4,5,4,5,6,7,8,9, 8,9,10,11,12,13,12,13,14,15,16,17, 16,17,18,19,20,21,20,21,22,23,24,25, 24,25,26,27,28,29,28,29,30,31,32,1};//32-bitpermutationfunctionPusedontheoutputoftheS-boxesconststaticcharP_Table[32]={ 16,7,20,21,29,12,28,17,1,15,23,26,5,18,31,10, 2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25};//permutedchoicetable(key)conststaticcharPC1_Table[56]={ 57,49,41,33,25,17,9,1,58,50,42,34,26,18, 10,2,59,51,43,35,27,19,11,3,60,52,44,36, 63,55,47,39,31,23,15,7,62,54,46,38,30,22, 14,6,61,53,45,37,29,21,13,5,28,20,12,4};//permutedchoicekey(table)conststaticcharPC2_Table[48]={ 14,17,11,24,1,5,3,28,15,6,21,10, 23,19,12,4,26,8,16,7,27,20,13,2, 41,52,31,37,47,55,30,40,51,45,33,48, 44,49,39,56,34,53,46,42,50,36,29,32};//numberleftrotationsofpc1conststaticcharLOOP_Table[16]={ 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};//The(in)famousS-boxesconststaticcharS_Box[8][4][16]={ //S1 14, 4, 13, 1,2,15,11,8,3,10,6,12,5,9,0,7, 0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8, 4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0, 15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13, //S2 15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10, 3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5, 0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15, 13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9, //S3 10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8, 13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1, 13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7, 1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12, //S4 7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15, 13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9, 10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4, 3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14, //S5 2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9, 14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6, 4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14, 11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3, //S6 12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11, 10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8, 9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6, 4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13, //S7 4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1, 13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6, 1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2, 6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12, //S8 13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7, 1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2, 7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8, 2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11};//////////////////////////////////////////////////////////////////////////typedefbool(*PSubKey)[16][48];//////////////////////////////////////////////////////////////////////////staticvoidDES(charOut[8],charIn[8],constPSubKeypSubKey,boolType);//标准DES加/解密staticvoidSetKey(constchar*Key,intlen);//设置密钥staticvoidSetSubKey(PSubKeypSubKey,constcharKey[8]);//设置子密钥staticvoidF_func(boolIn[32],constboolKi[48]);//f函数staticvoidS_func(boolOut[32],constboolIn[48]);//S盒代替staticvoidTransform(bool*Out,bool*In,constchar*Table,intlen);//变换staticvoidXor(bool*InA,constbool*InB,intlen);//异或staticvoidRotateL(bool*In,intlen,intloop);//循环左移staticvoidByteToBit(bool*Out,constchar*In,intbits);//字节组转换成位组staticvoidBitToByte(char*Out,constbool*In,intbits);//位组转换成字节组//////////////////////////////////////////////////////////////////////////staticboolSubKey[2][16][48];//16圈子密钥staticboolIs3DES;//3次DES标志staticcharTmp[256],deskey[16];//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////CodestartsfromLine130//////////////////////////////////////////////////////////////////////////boolDes_Go(char*Out,char*In,longdatalen,constchar*Key,intkeylen,boolType){if(!(Out&&In&&Key&&(datalen=(datalen+7)&0xfffffff8))) returnfalse; SetKey(Key,keylen); if(!Is3DES) {//1次DES for(longi=0,j=datalen>>3;i<j;++i,Out+=8,In+=8) DES(Out,In,&SubKey[0],Type); }else {//3次DES加密:加(key0)-解(key1)-加(key0)解密::解(key0)-加(key1)-解(key0) for(longi=0,j=datalen>>3;i<j;++i,Out+=8,In+=8) { DES(Out,In,&SubKey[0],Type); DES(Out,Out,&SubKey[1],!Type); DES(Out,Out,&SubKey[0],Type); } } returntrue;}voidSetKey(constchar*Key,intlen){ memset(deskey,0,16); memcpy(deskey,Key,len>16?16:len); SetSubKey(&SubKey[0],&deskey[0]); Is3DES=len>8?(SetSubKey(&SubKey[1],&deskey[8]),true):false;}voidDES(charOut[8],charIn[8],constPSubKeypSubKey,boolType){staticboolM[64],tmp[32],*Li=&M[0],*Ri=&M[32];ByteToBit(M,In,64);Transform(M,M,IP_Table,64);if(Type==ENCRYPT) {for(inti=0;i<16;++i) {memcpy(tmp,Ri,32);F_func(Ri,(*pSubKey)[i]);Xor(Ri,Li,32);memcpy(Li,tmp,32);}} else {for(inti=15;i>=0;--i) {memcpy(tmp,Li,32);F_func(Li,(*pSubKey)[i]);Xor(Li,Ri,32);memcpy(Ri,tmp,32);} }Transform(M,M,IPR_Table,64);BitToByte(Out,M,64);}voidSetSubKey(PSubKeypSubKey,constcharKey[8]){staticboolK[64],*KL=&K[0],*KR=&K[28];ByteToBit(K,Key,64);Transform(K,K,PC1_Table,56);for(inti=0;i<16;++i) {RotateL(KL,28,LOOP_Table[i]);RotateL(KR,28,LOOP_Table[i]);Transform((*pSubKey)[i],K,PC2_Table,48);}}voidF_func(boolIn[32],constboolKi[48]){staticboolMR[48];Transform(MR,In,E_Table,48);Xor(MR,Ki,48);S_func(In,MR);Transform(In,In,P_Table,32);}voidS_func(boolOut[32],constboolIn[48]){for(chari=0,j,k;i<8;++i,In+=6,Out+=4) {j=(In[0]<<1)+In[5];k=(In[1]<<3)+(In[2]<<2)+(In[3]<<1)+In[4]; ByteToBit(Out,&S_Box[i][j][k],4);}}voidTransform(bool*Out,bool*In,constchar*Table,intlen){for(inti=0;i<len;++i)Tmp[i]=In[Table[i]-1];memcpy(Out,Tmp,len);}voidXor(bool*InA,constbool*InB,intlen){for(inti=0;i<len;++i)InA[i]^=InB[i];}voidRotateL(bool*In,intlen,intloop){memcpy(Tmp,In,loop);memcpy(In,In+loop,len-loop);memcpy(In+len-loop,Tmp,loop);}voidByteToBit(bool*Out,constchar*In,intbits){for(inti=0;i<bits;++i)Out[i]=(In[i>>3]>>(i&7))&1;}voidBitToByte(char*Out,constbool*In,intbits){memset(Out,0,bits>>3);for(inti=0;i<bits;++i)Out[i>>3]|=In[i]<<(i&7);}////////////////////////////////////////////////////////////////////////////CodeendsatLine231//////////////////////////////////////////////////////////////////////////实验二：SHA加密算法实验目的验证SHA加密算法。实验任务运行加密程序，观察加密结果。实验流程打开SHA文件夹，运行WjcDesTest.dsw，执行程序。实验结果实验代码///////////////////////////////////////////////////////////////////////////////TheoneandonlyapplicationobjectCWinApptheApp;usingnamespacestd;int_tmain(intargc,TCHAR*argv[],TCHAR*envp[]){ intnRetCode=0; //initializeMFCandprintanderroronfailure// if(!AfxWinInit(::GetModuleHandle(NULL),NULL,::GetCommandLine(),0))// {// //TODO:changeerrorcodetosuityourneeds// cerr<<_T("FatalError:MFCinitializationfailed")<<endl;// nRetCode=1;// }// else// {// //TODO:codeyourapplication'sbehaviorhere.// CStringstrHello;// strHello.LoadString(IDS_HELLO);// cout<<(LPCTSTR)strHello<<endl;// } //TODO:Placecodehere. _tprintf(_T("\r\n[TestdriverfortheCSHA1class]\r\n")); TCHARtszInput[80]; while(true) { _tprintf(_T("\r\n1)Hashastring\r\n")); _tprintf(_T("2)Hashafile\r\n")); _tprintf(_T("3)Exit\r\n")); _tprintf(_T("\r\nEnter[1],[2]or[3]:")); //User'schoice fflush(stdin); _getts(tszInput); constintch=tszInput[0]; //Processuser'schoice if(ch==_T('3'))break; elseif(ch==_T('1'))HashString(); elseif(ch==_T('2'))HashFile(); else_tprintf(_T("\r\nInputerror:Enter1,2or3and[Enter].\r\n")); } returnnRetCode;}voidHashString(){ TCHARtszString[1024]; tszString[0]=0; _tprintf(_T("\r\nEnterthestringtohash:\r\n")); fflush(stdin); _getts(tszString); CSHA1sha1; sha1.Update((UINT_8*)tszString,_tcslen(tszString)*sizeof(TCHAR)); sha1.Final(); std::basic_string<TCHAR>strReport; sha1.ReportHashStl(strReport,CSHA1::REPORT_HEX_SHORT); _tprintf(_T("\r\nStringhashedto:\r\n")); _tprintf(strReport.c_str()); _tprintf(_T("\r\n"));}voidHashFile(){ TCHARtszFilename[1024]; tszFilename[0]=0; _tprintf(_T("\r\nFilename:")); fflush(stdin); _getts(tszFilename); CSHA1sha1; constboolbSuccess=sha1.HashFile(tszFilename); sha1.Final(); TCHARtszReport[41]; sha1.ReportHash(tszReport,CSHA1::REPORT_HEX_SHORT); if(bSuccess) { _tprintf(_T("\r\nFilecontentshashedto:\r\n")); _tprintf(tszReport); _tprintf(_T("\r\n")); } else _tprintf(_T("\r\nAnerroroccured(doesthefilereallyexist?).\r\n"));}实验三：简单替换实验目的验证简单替换加密算法。实验任务运行加密程序，观察加密结果。实验流程打开简单替换文件夹，运行yiwei.dsw，执行代码，观察实验结果。实验结果实验代码#include<iostream.h>#include<stdio.h>#defineWZ_COMMEND_NUM4char*WZ_Commend_Help[]={"替代法算法实现演示版本","====追求卓越,勇于创新====","",""};voidwz_printhelp();//界面intcaesar();//caesar替代算法函数intmain(){chark;caesar();cout<<"要继续运行本程序吗<y,n>？"<<flush;cin>>k;while(k=='y'||k=='Y'){ caesar(); cout<<"要继续运行本程序吗<y,n>？"<<flush;cin>>k;}return0;}intcaesar(){charM[10];//存储输入明文字符charC[10];//存储加密密文字符charc;//接收输入的变量inti,k1,k2;//控制变量wz_printhelp();for(i=0;i<10;i++){//对两个数组进行赋初值''M[i]=C[i]='';}cout<<"请输入10个字符:"<<flush;//明文输入for(i=0;i<10;i++){c=getchar();M[i]=c;}cout<<"你输入的字符为："<<flush;//明文显示for(i=0;i<10;i++)cout<<M[i];cout<<endl//加密过程，获取密文 <<"要加密吗(y,n)?"<<flush;cin>>c;if(c=='y'||c=='Y'){cout<<"请输入移位密码（1-25）："<<flush;cin>>k1;cout<<"请重复移位密码（1-25）："<<flush;cin>>k2;while(k1!=k2){cout<<"密码不一致!请再次输入!"<<endl;cout<<"请输入移位密码（1-25）："<<flush;cin>>k1;cout<<"请重复移位密码（1-25）："<<flush;cin>>k2;}for(i=0;i<10;i++){//加密算法if((M[i]<'A'||M[i]>'Z')&&(M[i]<'a'||M[i]>'z')) C[i]=M[i]; elseif(M[i]>='A'&&M[i]<='Z')C[i]='A'+((M[i]-'A'+k1)%26); elseif(M[i]>='a'&&M[i]<='z')C[i]='a'+((M[i]-'a'+k1)%26); } cout<<"明文已加密!"<<endl;cout<<"密文显示："<<flush; for(i=0;i<10;i++){ cout<<C[i];} cout<<endl;}else{ cout<<"你未加密明文，不安全！"<<endl;return0;}cout<<"要查看明文吗(y,n)？"<<flush;//解密过程，获取明文cin>>c;if(c=='y'||c=='Y'){cout<<"进行解密，请输入密码："<<flush;cin>>k1;if(k1==k2){ for(i=0;i<10;i++){//解密算法if((C[i]<'A'||C[i]>'Z')&&(C[i]<'a'||C[i]>'z')) M[i]=C[i]; elseif(C[i]>='A'&&C[i]<='Z')M[i]='A'+((C[i]-'A'-k1+26)%26); elseif(C[i]>='a'&&C[i]<='z')M[i]='a'+((C[i]-'a'-k1+26)%26); } cout<<"明文显示："<<flush; for(i=0;i<10;i++)cout<<M[i];cout<<endl; }elsecout<<"密码错误！查看失败！"<<endl;}return0;}voidwz_printhelp(){inti;printf("\t");for(i=0;i<22;i++){printf("%c",5);}printf("\n");for(i=0;i<WZ_COMMEND_NUM;i++){printf("\t%c\t%s%c\n",5,WZ_Commend_Help[i],5);}printf("\t");for(i=0;i<22;i++){ printf("%c",5);}printf("\n");return;}实验四：简易密钥实现实验目的验证RSA加密算法。实验任务运行加密程序