用DES算法对图片进行加密解密.docx
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用DES算法对图片进行加密解密.docx
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用DES算法对图片进行加密解密
用DES算法对图片进行加密解密
//main.cpp
#include"DES.h"
#include
#include
#include
usingnamespacestd;
voidEncrypt_Mode(void);
voidTest_Mode(void);
intmain()
{
intchoose;
cout<<"\t\t\t####S-BOXDesign####"< cout<<"1.UseStandardS-Box\n2.UseRandomS-Box\n3.UseLinearityS- Box\n4.MyDesignS-Box"< cout<<"YourChoose: "; cin>>choose; if((choose! =1)&&(choose! =2)&&(choose! =3)&&(choose! =4)) { cout<<"ErrorChoose! "< return1; } system("cls"); switch(choose) { case1: break; case2: GetRandSBox(); break; case3: GetLineSBox(); break; case4: MySBox(); break; } cout<<"\t\t\t####DESEncryptSystem####"< cout<<"1.EncryptMode\n2.TestMode"< cout<<"YourChoose: "; cin>>choose; system("cls"); switch(choose) { case1: Encrypt_Mode(); break; case2: Test_Mode(); break; default: cout<<"ErrorChoose! "< } return0; } //////////////////////////////////////////////////////////////////////////////////// voidEncrypt_Mode() { uvar32FileSize,Offset,DataSize; charIV[]="wangyao"; charkey[8]={1,9,8,7,0,3,1,4}; charplaint[8]={0},crypt[8]={0}; //stringHeader; charHeader[HEAD_LEN]; ifstreamfin; ofstreamfout; intchoose; while(true) { cout<<"\t\t\tDESEncryptBMPFileSystem"< cout<<"\n1.EBCENCRYPT\n2.EBCDECRYPT\n3.CBCENCRYPT\n4.CBC DECRYPT\n5.Exit"< cout<<"YourChoose: "; cin>>choose; if(choose==5) break; elseif((choose! =1)&&(choose! =2)&&(choose! =3)&&(choose! =4)) { cout<<"WrongChoose! "< break; } cout<<"Enterthefile'sname: "; stringfilename; cin>>filename; ifstreamfin(filename.c_str(),ios: : binary); stringoutfilename=filename; outfilename="out_"+outfilename; ofstreamfout(outfilename.c_str(),ios: : binary); if(! fin||! fout) { cout<<"OpenFileError! "< return; } fin.seekg (2);//Skip"BM"(theheadoftheBMPfile) fin.read((char*)&FileSize,sizeof(uvar32));//GettheBMPFileSize fin.seekg(sizeof(uvar32),ios_base: : cur);//SkiptheReservedField fin.read((char*)&Offset,sizeof(uvar32));//GettheOffsetoftheRealSize DataSize=FileSize-Offset;//GettheDataSize;Alsocanbedoneby"DataSize" FieldintheHeader //SettheKey Des_SetKey(key); //CopytheHeadertoencryptfile fin.seekg(ios: : beg); fin.read(Header,Offset); fout.write(Header,Offset); memcpy(crypt,IV,8);//GettheIVkey //DoDESEncrypt for(inti=0;i { fin.read(plaint,8); switch(choose) { case1: //ECBDESENCRYPT ECB_Des_Run(crypt,plaint,ENCRYPT); fout.write(crypt,8); break; case2: //ECBDESDECRYPT ECB_Des_Run(crypt,plaint,DECRYPT); fout.write(crypt,8); break; case3: //CBCDESENCRYPT CBC_Des_Run(crypt,plaint,ENCRYPT); fout.write(crypt,8); break; case4: //CBCDESDECRYPT CBC_Des_Run(crypt,plaint,DECRYPT); fout.write(crypt,8); memcpy(crypt,plaint,8);//GettheIVkey } } system("cls"); } fin.close(); fout.close(); system("pause"); } voidTest_Mode() { boolPlaintBits1[64]={0},PlaintBits2[64]={0};//Snowslip_Test boolPlaintBits[PLAINT_SIZE][64];//Completeness_Test intchoose; while(true) { cout<<"\t\t\t####DESTestMode####"< cout<<"1.SnowslipTest\n2.CompletenessTest\n3.DifferentialCryptanalysis Test\n4.Exit"< cout<<"YourChoose: "; cin>>choose; if(choose==4) break; switch(choose) { case1: //Snowslip_Test GetRandPlaint_Snowslip(PlaintBits1,PlaintBits2); Snowslip_Test(PlaintBits1,PlaintBits2); break; case2: //Completeness_Test GetRandPlaint_Complete(PlaintBits); Completeness_Test(PlaintBits); break; case3: Differential_Analysis(); break; default: cout<<"ErrorChoose! "< } system("pause"); system("cls"); } } //~main.cpp 以下为des的代码: //DES.cpp #include #include #include #include #include"DES.h" usingnamespacestd; //////////////////////////////////////////////////////////////////// //initialpermutationIP conststaticcharIP_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^-1 conststaticcharIPR_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 }; //expansionoperationmatrix staticconstcharE_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-boxes conststaticcharP_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 }; //numberleftrotationsofpc1 conststaticcharLOOP_Table[16]={ 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1 }; //externcharS_Box[8][4][16]; //The(in)famousS-boxes //conststaticcharS_Box[8][4][16]={ staticcharS_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 }; ////////////////////////////////////////////////////////////////////////// staticboolSubKey[16][48];//16圈子密钥 ////////////////////////////////////////////////////////////////////////// voidECB_Des_Run(charOut[8],charIn[8],boolType) { staticboolM[64],Tmp[32],*Li=&M[0],*Ri=&M[32]; ByteToBit(M,In,64); Transform(M,M,IP_Table,64); if(Type==ENCRYPT){ //fk(L,R)=(L^F(R,SK),R) for(inti=0;i<16;i++){ memcpy(Tmp,Ri,32); F_func(Ri,SubKey[i]); Xor(Ri,Li,32); memcpy(Li,Tmp,32); } }else{ for(inti=15;i>=0;i--){ memcpy(Tmp,Li,32); F_func(Li,SubKey[i]); Xor(Li,Ri,32); memcpy(Ri,Tmp,32); } } Transform(M,M,IPR_Table,64); BitToByte(Out,M,64); } voidCBC_Des_Run(charOut[8],charIn[8],boolType) { staticboolM[64],N[64],Tmp[32],*Li=&M[0],*Ri=&M[32]; ByteToBit(M,In,64); ByteToBit(N,Out,64); if(Type==ENCRYPT) Xor(M,N,64); Transform(M,M,IP_Table,64); if(Type==ENCRYPT){ //fk(L,R)=(L^F(R,SK),R) for(inti=0;i<16;i++){ memcpy(Tmp,Ri,32); F_func(Ri,SubKey[i]); Xor(Ri,Li,32); memcpy(Li,Tmp,32); } }else{ for(inti=15;i>=0;i--){ memcpy(Tmp,Li,32); F_func(Li,SubKey[i]); Xor(Li,Ri,32); memcpy(Ri,Tmp,32); } } Transform(M,M,IPR_Table,64); if(Type==DECRYPT) Xor(M,N,64); BitToByte(Out,M,64); //BitToByte(In,N,64); } voidDes_SetKey(constcharKey[8]) { staticboolK[64],*KL=&K[0],*KR=&K[28]; ByteToBit(K,Key,64); //PC1Transform Transform(K,K,PC1_Table,56); for(inti=0;i<16;i++){ RotateL(KL,28,LOOP_Table[i]);//Leftshiftcircle RotateL(KR,28,LOOP_Table[i]); //PC2Transform Transform(SubKey[i],K,PC2_Table,48); } } //ARoundofDES voidF_func(boolIn[32],constboolKi[48]) { staticboolMR[48]; //ETransform Transform(MR,In,E_Table,48); Xor(MR,Ki,48); S_func(In,MR);//SBOX //PTransform Tr
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- DES 算法 图片 进行 加密 解密