DES加解密算法C语言源代码

#includestdio.h#includestring.hvoidEncodeMain();//EncodeMainfunctionvoidDecodeMain();//Sorry,ithasnotusedvoidDecode(int*str,int*keychar);//decode:input8chars,8keycharsvoidEncode(int*str,int*keychar);//encode:input8chars,8keycharsvoidkeyBuild(int*keychar);//createkeyarrayvoidStrtoBin(int*midkey,int*keychar);//changeintobinaryvoidkeyCreate(int*midkey2,intmovebit,inti);//callbykeyBuildvoidEncodeData(int*lData,int*rData,int*srt);//encodedatafunctionvoidF(int*rData,int*key);//FfunctionvoidExpand(int*rData,int*rDataP);//ExpandfunctionvoidExchangeS(int*rDataP,int*rData);//S-diagramchangevoidExchangeP(int*rData);//PchangevoidFillBin(int*rData,intn,ints);//datatobinary;callbyS-DiagramchangefunctionvoidDecodeData(int*str,int*lData,int*rData);//DecodeDatafrombinaryintIP1[]={58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,4,//initialchange62,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,57,49,41,33,25,17,9,1,59,51,43,35,27,19,11,3,61,53,45,37,29,21,13,5,63,55,47,39,31,23,15,7,};intIP2[]={40,8,48,16,56,24,64,32,39,7,47,15,55,23,63,31,//oppinitialchange38,6,46,14,54,22,62,30,37,5,45,13,53,21,61,29,36,4,44,12,52,20,60,28,35,3,43,11,51,19,59,27,34,2,42,10,50,18,58,26,33,1,41,9,49,17,57,25};ints[][4][16]={{//S-diagramarray{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}},{{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}},{{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}},{{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}},{{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}},{{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}},{{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}},{{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}}};intEx[48]={32,1,2,3,4,5,//Expandarray4,5,6,7,8,9,8,9,10,11,12,13,12,13,14,15,16,17,16,17,18,19,20,21,20,21,22,23,24,25,24,25,26,27,28,29,28,29,30,31,32,1};intP[32]={16,7,20,21,//P-change29,12,28,17,1,15,23,26,5,18,31,10,2,8,24,14,32,27,3,9,19,13,30,6,22,11,4,25};intPC1[56]={57,49,41,33,25,17,9,//PC-1inkeyBuild1,58,50,42,34,26,18,10,2,59,51,43,35,27,19,11,3,60,52,44,36,63,55,47,39,31,33,15,7,62,54,46,38,30,22,14,6,61,53,45,37,29,21,13,5,28,20,12,4};intPC2[48]={14,17,11,24,1,5,//PC-2inkeyBuild3,28,15,6,21,10,23,19,12,4,26,8,16,7,27,20,13,2,41,52,31,37,47,55,30,40,51,45,33,48,44,49,39,56,34,53,46,42,50,36,29,32};intkey[16][48];charstr[8];voidmain()//mainfunction{EncodeMain();}voidEncodeMain()//EncodeMainfunction{inti;charkeychar[8];intkey2[8];intstrkey[8];printf(ÇëÊäÈë8¸öÒª¼ÓÃܵÄ×Ö·û£º\n);for(i=0;i8;i++)scanf(%c,&str[i]);getchar();for(i=0;i8;i++)strkey[i]=str[i];printf(\nÊäÈëÃ÷ÎĵÄÊ®Áù½øÖÆΪ:\n);for(i=0;i8;i++)printf(%10x,strkey[i]);printf(\nÇëÊäÈëÃÜÔ¿(8¸ö×Ö·û):\n);for(i=0;i8;i++)scanf(%c,&keychar[i]);for(i=0;i8;i++)key2[i]=keychar[i];getchar();//printf(%c,keychar[i]);Encode(strkey,key2);printf(\n¼ÓÃܺóÊ®Áù½øÖÆÃÜÎÄÊÇ:\n);for(i=0;i8;i++)printf(%10x,strkey[i]);printf(\n\nÇëÊäÈë½âÃÜÃÜÂë\n);for(i=0;i8;i++)scanf(%c,&keychar[i]);for(i=0;i8;i++)key2[i]=keychar[i];Decode(strkey,key2);for(i=0;i8;i++)printf(%10x,strkey[i]);for(i=0;i8;i++)str[i]=strkey[i];printf(\nÃ÷ÎÄΪ£º\t);for(i=0;i8;i++)printf(%c,str[i]);printf(\n\n);}voidkeyBuild(int*keychar){//createkeyarrayinti,j;intmovebit[]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};intmidkey2[56];intmidkey[64];StrtoBin(midkey,keychar);for(i=0;i56;i++)midkey2[i]=midkey[PC1[i]-1];for(i=0;i16;i++)keyCreate(midkey2,movebit[i],i);}voidStrtoBin(int*midkey,int*keychar){//changeintobinaryinttrans[8],i,j,k,n;n=0;for(i=0;i8;i++){j=0;while(keychar[i]!=0){trans[j]=keychar[i]%2;keychar[i]=keychar[i]/2;j++;}for(k=j;k8;k++)trans[k]=0;for(k=0;k8;k++)midkey[n++]=trans[7-k];}}voidkeyCreate(int*midkey2,intmovebit,intn){inti,temp[4];temp[0]=midkey2[0];temp[1]=midkey2[1];temp[2]=midkey2[28];temp[3]=midkey2[29];if(movebit==2){for(i=0;i26;i++){midkey2[i]=midkey2[i+2];midkey2[i+28]=midkey2[i+30];}midkey2[26]=temp[0];midkey2[27]=temp[1];midkey2[54]=temp[2];midkey2[55]=temp[3];}else{for(i=0;i27;i++){midkey2[i]=midkey2[i+1];midkey2[i+28]=midkey2[i+29];}midkey2[27]=temp[0];midkey2[55]=temp[2];}for(i=0;i48;i++)key[n][i]=midkey2[PC2[i]-1];}voidEncodeData(int*lData,int*rData,int*str){//encodedatafunctioninti,j,temp[8],lint,rint;/