C++ DES加密解密string字符串

#include<iostream> #include <string> #include<stdio.h> #include<memory.h> #include "base64.h" using namespace std; const char IP_Table[64] =//初始置换 { 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 }; const char IPR_Table[64] = //初始逆置换表 { 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 }; static const char Extension_Table[48]= //扩展置换表 { 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 }; const static char P_Table[32]= //P盒置换表 { 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 }; const static char PCK_Table[56] =//密钥置换（原64位去掉奇偶校验位后） { 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 }; const static char LOOP_Table[16] =//左移 { 1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1 }; const static char PCC_Table[48] =//压缩置换表 { 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 }; const static char S_Box[8][4][16] =//8个S盒 { { // 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 } } }; typedef bool (*PSubKey)[16][48]; enum{ENCRYPT,DECRYPT}; bool SubKey[2][16][48]; bool Is3DES; char Tmp[256],deskey[16]; void SetKey(const char *Key,int len); void SetSubKey(PSubKey pSubKey,const char Key[8]); void F_func(bool In[32],const bool Ki[48]); void S_func(bool Out[32],const bool In[48]); void Transform(bool *Out[32],const bool In[48],int len); void Xor(bool *InA,const bool *InB,int len); void RotateL(bool *In,int len,int loop); void ByteToBit(bool *Out,const char *In,int bits); void BitToByte(char *Out,const bool *In,int bits); void myDES(char Out[8],char In[8],const PSubKey pSubKey,bool Type); //bool DES_Act(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type); bool DES_Act(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type,bool is3DES); void ByteToBit(bool *Out,const char *In,int bits) { for(int i=0;i<bits;++i) Out[i]=(In[i>>3]>>(i&7))&1; } void BitToByte(char *Out,const bool *In,int bits) { memset(Out,0,bits>>3); for(int i=0;i<bits;++i) Out[i>>3] |=In[i]<<(i&7); } void Transform(bool *Out,bool *In,const char *Table,int len) { for(int i=0;i<len;++i) Tmp[i]=In[Table[i]-1]; memcpy(Out,Tmp,len); } void Xor(bool *InA,const bool *InB,int len) { for(int i=0;i<len;++i) InA[i]^=InB[i]; } void RotateL(bool *In,int len,int loop) { memcpy(Tmp,In,loop); memcpy(In,In+loop,len-loop); memcpy(In+len-loop,Tmp,loop); } void S_func(bool Out[32],const bool In[48]) { for(char i=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); } } void F_func(bool In[32],const bool Ki[48]) { static bool MR[48]; Transform(MR,In,Extension_Table,48); Xor(MR,Ki,48); S_func(In,MR); Transform(In,In,P_Table,32); } void SetSubKey(PSubKey pSubKey,const char Key[8]) { static bool K[64],*KL=&K[0],*KR=&K[28]; ByteToBit(K,Key,64); Transform(K,K,PCK_Table,56); for(int i=0;i<16;i++) { RotateL(KL,28,LOOP_Table[i]); RotateL(KR,28,LOOP_Table[i]); Transform((*pSubKey)[i],K,PCC_Table,48); } } void SetKey(const char *Key,int len) { 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; } void DES(char Out[8],char In[8],const PSubKey pSubKey,bool Type) { static bool M[64],tmp[32],*Li=&M[0],*Ri=&M[32]; ByteToBit(M,In,64); Transform(M,M,IP_Table,64); if(Type==ENCRYPT) { for(int i=0;i<16;i++) { memcpy(tmp,Ri,32); F_func(Ri,(*pSubKey)[i]); Xor(Ri,Li,32); memcpy(Li,tmp,32); } } else { for(int i=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); } /*bool DES_Act(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type) { if(!(Out&&In&&Key && (datalen=datalen+7)&0xfffffff8)) return false; SetKey(Key,keylen); if(!Is3DES) { for(long i=0,j=datalen>>3;i<j;++i,Out+=8,In+=8) DES(Out,In,&SubKey[0],Type); } else { for(long i=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); } } return true; }*///原版 //bool DES_Act(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type,bool is3DES) bool DES_Act(char *Out,char *In,long datalen,const char *Key,int keylen,bool Type,bool is3DES) { if(!(Out&&In&&Key && (datalen=datalen+7)&0xfffffff8)) return false; SetKey(Key,keylen); if(!is3DES) { for(long i=0,j=datalen>>3;i<j;++i,Out+=8,In+=8) DES(Out,In,&SubKey[0],Type); } else { for(long i=0,j=datalen>>3;i<j;++i,Out+=8,In+=8) { DES(Out