DESCFBandOFB模式文件.docx
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DESCFBandOFB模式文件.docx
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DESCFBandOFB模式文件
DES----CFB-and---OFB模式-文件
#include"stdio.h"
#include"memory.h"
#include"time.h"
#include"stdlib.h"
#include"string.h"
#definePLAIN_FILE_OPEN_ERROR-1
#defineKEY_FILE_OPEN_ERROR-2
#defineCIPHER_FILE_OPEN_ERROR-3
#defineOK1
typedefcharElemType;
//初始置换表IP
intIP_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
};//初始置换表
//逆初始置换表IP^-1
intIP_1_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
};//末置换表
//扩充置换表E
intE_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
};//扩展置换表
//置换函数P
intP_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
};//p盒置换表
//S盒
intS[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}}};
//置换选择1
intPC_1[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
};
//置换选择2
intPC_2[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
};//密钥压缩表
//对左移位数表
intMOVE_TIMES[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
voidByteToBit(ElemTypech,ElemTypebit[8]);//字节转换成二进制
voidBitToByte(ElemTypebit[8],ElemType*ch);//二进制转换成字节
voidChar8ToBit64(ElemTypech[8],ElemTypebit[64]);//将长度为8的字符串转为二进制位串
voidDES_MakeSubKeys(ElemTypekey[64],ElemTypesubKeys[16][48]);//生成子密钥
voidDES_PC1_Transform(ElemTypekey[64],ElemTypetempbts[56]);//密钥置换
voidDES_PC2_Transform(ElemTypekey[56],ElemTypetempbts[48]);//密钥扩展
voidDES_ROL(ElemTypedata[56],inttime);//密钥移动方法
voidDES_IP_Transform(ElemTypedata[64]);//初始变换
voidDES_IP_1_Transform(ElemTypedata[64]);//末置换
voidDES_E_Transform(ElemTypedata[48]);//数据右部扩展
voidDES_P_Transform(ElemTypedata[32]);//p置换
voidDES_SBOX(ElemTypedata[48]);//s置换
voidDES_XOR(ElemTypeR[48],ElemTypeL[48],intcount);
voidDES_Swap(ElemTypeleft[32],ElemTyperight[32]);
voidDES_EncryptBlock(ElemTypeplainBlock[8],ElemTypesubKeys[16][48],ElemTypecipherBlock[8]);
voidDES_DecryptBlock(ElemTypecipherBlock[8],ElemTypesubKeys[16][48],ElemTypeplainBlock[8]);
intDES_Encrypt(char*plainFile,char*keyStr,char*cipherFile);//加密方法
intDES_Decrypt(char*cipherFile,char*keyStr,char*plainFile);//解密方法
intCFB_Decrypt(ElemTypeplain[100],ElemTypekey[8],ElemTypecipher[100]);
intCFB_Encrypt(ElemTypeplain[100],ElemTypekey[8],ElemTypecipher[100]);
//字节转换成二进制
voidByteToBit(ElemTypech,ElemTypebit[8]){
intcnt;
for(cnt=0;cnt<8;cnt++){
*(bit+cnt)=(ch>>cnt)&1;
}
}
//二进制转换成字节
voidBitToByte(ElemTypebit[8],ElemType*ch){
intcnt;
for(cnt=0;cnt<8;cnt++){
*ch|=*(bit+cnt)< } } //将长度为8的字符串转为二进制位串 voidChar8ToBit64(ElemTypech[8],ElemTypebit[64]){ intcnt; for(cnt=0;cnt<8;cnt++){ ByteToBit(*(ch+cnt),bit+(cnt<<3)); } } //将二进制位串转为长度为8的字符串 voidBit64ToChar8(ElemTypebit[64],ElemTypech[8]){ intcnt; memset(ch,0,8); for(cnt=0;cnt<8;cnt++){ BitToByte(bit+(cnt<<3),ch+cnt); } } //生成子密钥 voidDES_MakeSubKeys(ElemTypekey[64],ElemTypesubKeys[16][48]){ ElemTypetemp[56]; intcnt; DES_PC1_Transform(key,temp);//PC1置换 for(cnt=0;cnt<16;cnt++){//16轮跌代,产生16个子密钥 DES_ROL(temp,MOVE_TIMES[cnt]);//循环左移 DES_PC2_Transform(temp,subKeys[cnt]);//PC2置换,产生子密钥 } } //密钥置换方法 voidDES_PC1_Transform(ElemTypekey[64],ElemTypetempbts[56]){ intcnt; for(cnt=0;cnt<56;cnt++){ tempbts[cnt]=key[PC_1[cnt]-1]; } } //密钥扩展方法 voidDES_PC2_Transform(ElemTypekey[56],ElemTypetempbts[48]){ intcnt; for(cnt=0;cnt<48;cnt++){ tempbts[cnt]=key[PC_2[cnt]-1]; } } //循环左移 voidDES_ROL(ElemTypedata[56],inttime){ ElemTypetemp[56]; //保存将要循环移动到右边的位 memcpy(temp,data,time); memcpy(temp+time,data+28,time); //前28位移动 memcpy(data,data+time,28-time); memcpy(data+28-time,temp,time); //后28位移动 memcpy(data+28,data+28+time,28-time); memcpy(data+56-time,temp+time,time); } //IP置换 voidDES_IP_Transform(ElemTypedata[64]){ intcnt; ElemTypetemp[64]; for(cnt=0;cnt<64;cnt++){ temp[cnt]=data[IP_Table[cnt]-1]; } memcpy(data,temp,64); } //IP逆置换 voidDES_IP_1_Transform(ElemTypedata[64]){ intcnt; ElemTypetemp[64]; for(cnt=0;cnt<64;cnt++){ temp[cnt]=data[IP_1_Table[cnt]-1]; } memcpy(data,temp,64); } //扩展置换 voidDES_E_Transform(ElemTypedata[48]){ intcnt; ElemTypetemp[48]; for(cnt=0;cnt<48;cnt++){ temp[cnt]=data[E_Table[cnt]-1]; } memcpy(data,temp,48); } //P置换 voidDES_P_Transform(ElemTypedata[32]){ intcnt; ElemTypetemp[32]; for(cnt=0;cnt<32;cnt++){ temp[cnt]=data[P_Table[cnt]-1]; } memcpy(data,temp,32); } //异或 voidDES_XOR(ElemTypeR[48],ElemTypeL[48],intcount){ intcnt; for(cnt=0;cnt R[cnt]^=L[cnt]; } } //S盒置换 voidDES_SBOX(ElemTypedata[48]){ intcnt; intline,row,output; intcur1,cur2; for(cnt=0;cnt<8;cnt++){ cur1=cnt*6; cur2=cnt<<2; //计算在S盒中的行与列 line=(data[cur1]<<1)+data[cur1+5];//每组第一位乘2加上第六位 row=(data[cur1+1]<<3)+(data[cur1+2]<<2) +(data[cur1+3]<<1)+data[cur1+4];//每组第二位乘8加上第三位乘4加上第四位乘2加上第五位 output=S[cnt][line][row]; //化为2进制 data[cur2]=(output&0X08)>>3; data[cur2+1]=(output&0X04)>>2; data[cur2+2]=(output&0X02)>>1; data[cur2+3]=output&0x01; } } //交换 voidDES_Swap(ElemTypeleft[32],ElemTyperight[32]){ ElemTypetemp[32]; memcpy(temp,left,32); memcpy(left,right,32); memcpy(right,temp,32); } //加密单个分组 voidDES_EncryptBlock(ElemTypeplainBlock[8],ElemTypesubKeys[16][48],ElemTypecipherBlock[8]){ ElemTypeplainBits[64]; ElemTypecopyRight[48]; intcnt; Char8ToBit64(plainBlock,plainBits); //初始置换(IP置换) DES_IP_Transform(plainBits); //16轮迭代 for(cnt=0;cnt<16;cnt++){ memcpy(copyRight,plainBits+32,32); //将右半部分进行扩展置换,从32位扩展到48位 DES_E_Transform(copyRight); //将右半部分与子密钥进行异或操作 DES_XOR(copyRight,subKeys[cnt],48); //异或结果进入S盒,输出32位结果 DES_SBOX(copyRight); //P置换 DES_P_Transform(copyRight); //将明文左半部分与右半部分进行异或 DES_XOR(plainBits,copyRight,32); if(cnt! =15){ //最终完成左右部的交换 DES_Swap(plainBits,plainBits+32); } } //逆初始置换(IP^1置换) DES_IP_1_Transform(plainBits); Bit64ToChar8(plainBits,cipherBlock); } //解密单个分组 voidDES_DecryptBlock(ElemTypecipherBlock[8],ElemTypesubKeys[16][48],ElemTypeplainBlock[8]){ ElemTypecipherBits[64]; ElemTypecopyRight[48]; intcnt; Char8ToBit64(cipherBlock,cipherBits); //初始置换(IP置换) DES_IP_Transform(cipherBits); //16轮迭代 for(cnt=15;cnt>=0;cnt--){ memcpy(copyRight,cipherBits+32,32); //将右半部分进行扩展置换,从32位扩展到48位 DES_E_Transform(copyRight); //将右半部分与子密钥进行异或操作 DES_XOR(copyRight,subKeys[cnt],48); //异或结果进入S盒,输出32位结果 DES_SBOX(copyRight); //P置换 DES_P_Transform(copyRight); //将明文左半部分与右半部分进行异或 DES_XOR(cipherBits,copyRight,32); if(cnt! =0){ //最终完成左右部的交换 DES_Swap(cipherBits,cipherBits+32); } } //逆初始置换(IP^1置换) DES_IP_1_Transform(cipherBits); Bit64ToChar8(cipherBits,plainBlock); } intDES_Encrypt(ElemTypeIV[64],ElemTypekey[8],ElemTypeSfrist[8]) { ElemTypeIVBlock[64],bKey[8],subKeys[16][48],cipherBlock[8],cipherBits[64]; Bit64ToChar8(IV,IVBlock); Char8ToBit64(key,bKey); //生成子密钥 DES_MakeSubKeys(bKey,subKeys); DES_EncryptBlock(IVBlock,subKeys,cipherBlock); Char8ToBit64(cipherBlock,cipherBits); for(inti=0;i<8;i++) {Sfrist[i]=cipherBits[i];} returnOK; } intCFB_Encrypt(ElemTypeplain[100],ElemTypekey[8],ElemTypecipher[100]) { ElemTypeplainbit[8]; ElemTypeSfrist[8],Cbit[8]; ElemTypeIV[64],IVBlock[8]={0}; Char8ToBit64(IVBlock,IV); //DES_Encrypt(IV,key,Sfrist); for(inti=0;i { DES_
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