TCP-servce-.rar_C实现TCP传输_TCP-servce_tcp 数据传输

///////////////////////////////////////////////////////////////////////////// //Project: 互联资讯电子券项目--中心服务部分 //Discription: DES加密、解密公共模块 //Written By: ZXZ //Date: 2001-08-21 //Version: 1.0 //Modified by: //Modified Date: //Version: //////////////////////////////////////////////////////////////////////////// #include "stdafx.h" #include "des.h" #include <string.h> static unsigned char C[17][28],D[17][28],K[17][48],c,ch1; void DesMac(unsigned char *source, int iLen, unsigned char *dest, unsigned char *key) { unsigned char strXOR[8], strTemp[8]; int i, iCount=iLen/8, iRemain=iLen%8; memset(strXOR, 0, sizeof(strXOR)); for(i=0; i<iCount; i++) Do_XOR(strXOR, source+8*i, 8); if (iRemain) { memset(strTemp, 0, 8); memcpy(strTemp, source+8*iCount, iRemain); Do_XOR(strXOR, strTemp, 8); } Des(strXOR, dest, key, 'e'); } // 做DES void Des(unsigned char *source, unsigned char *dest, unsigned char *key, unsigned char flag) { char tmp[64]; expand0(key, tmp); setkeystar((unsigned char *)tmp); if ( flag == ENCRYPT || flag == 'e' || flag == 'E' ) encrypt0(source, dest); else discrypt0(source, dest); } // 做异或 void Do_XOR(unsigned char *dest, unsigned char *source, int size) { int i; for(i=0; i<size; i++) dest[i] ^= source[i]; } void HEX_2_DSP(unsigned char *hex, unsigned char *dsp, int count) { int i; unsigned char ch; for (i = 0; i < count; i++) { ch=(unsigned char)((hex[i]&0xf0)>>4); dsp[i*2]=(char)((ch>9)?ch+0x41-10:ch+0x30); ch=(unsigned char)(hex[i]&0xf); dsp[i*2+1]=(char)((ch>9)?ch+0x41-10:ch+0x30); } } void DSP_2_HEX(unsigned char *dsp, unsigned char *hex, int count) { int i; unsigned char ch1, ch2; for (i = 0; i < count; i++) { ch1 = (unsigned char)dsp[i*2], ch2 = (unsigned char)dsp[i*2+1]; hex[i]=(char)((((ch1<=0x39)?ch1-0x30:(ch1&0xdf)-0x41+10)<<4) |((ch2<=0x39)?ch2-0x30:(ch2&0xdf)-0x41+10)); } } void encrypt0(unsigned char *text, unsigned char *mtext) { char ll[64],rr[64],LL[64],RR[64]; unsigned char tmp[64]; int i,j; ip(text,(unsigned char *)ll,(unsigned char *)rr); for (i=1;i<17;i++) { FF(i,ll,rr,LL,RR); for (j=0;j<32;j++) { ll[j]=LL[j]; rr[j]=RR[j]; } } _ip(tmp,(unsigned char *)rr,(unsigned char *)ll); compress0(tmp,mtext); } void discrypt0(unsigned char *mtext, unsigned char *text) { char ll[64],rr[64],LL[64],RR[64]; unsigned char tmp[64]; int i,j; ip(mtext,(unsigned char *)ll,(unsigned char *)rr); for (i=16;i>0;i--) { FF(i,ll,rr,LL,RR); for (j=0;j<32;j++) { ll[j]=LL[j]; rr[j]=RR[j]; } } _ip(tmp,(unsigned char *)rr,(unsigned char *)ll); compress0(tmp,text); } void expand0(unsigned char *in, char *out) { int divide; int i,j; for (i=0;i<8;i++) { divide=0x80; for (j=0;j<8;j++) { *out++=(in[i]/divide)&1; divide/=2; } } } void compress0(unsigned char *out, unsigned char *in) { int times; int i,j; for (i=0;i<8;i++) { times=0x80; in[i]=0; for (j=0;j<8;j++) { in[i]+=(*out++)*times; times/=2; } } } void compress016(unsigned char *out, unsigned char *in) { int times; int i,j; for (i=0;i<16;i++) { times=0x8; in[i]='0'; for (j=0;j<4;j++) { in[i]+=(*out++)*times; times/=2; } } } static int pc_1_c[28]= { 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 }; static int pc_1_d[28]= { 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 }; static int pc_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 }; static int ls_count[16]= { 1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1 }; void setkeystar(unsigned char *bits) { int i,j; for (i=0;i<28;i++) C[0][i]=bits[pc_1_c[i]-1]; for (i=0;i<28;i++) D[0][i]=bits[pc_1_d[i]-1]; for (j=0;j<16;j++) { LS((char *)C[j],(char *)C[j+1],ls_count[j]); LS((char *)D[j],(char *)D[j+1],ls_count[j]); son((char *)C[j+1],(char *)D[j+1],(char *)K[j+1]); } } void LS(char *bits, char *buffer, int count) { int i; for (i=0;i<28;i++) { buffer[i]=bits[(i+count)%28]; } } void son(char *cc, char *dd, char *kk) { int i; char buffer[56]; for (i=0;i<28;i++) buffer[i] = *cc++; for (i=28;i<56;i++) buffer[i] = *dd++; for (i=0;i<48;i++) *kk++=buffer[pc_2[i]-1]; } static int ip_tab[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 }; static int _ip_tab[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 }; void ip(unsigned char *text, unsigned char *ll, unsigned char *rr) { int i; char buffer[64]; expand0(text,buffer); for (i=0;i<32;i++) ll[i]=buffer[ip_tab[i]-1]; for (i=0;i<32;i++) rr[i]=buffer[ip_tab[i+32]-1]; } void _ip(unsigned char *text, unsigned char *ll, unsigned char *rr) { int i; char tmp[64]; for (i=0;i<32;i++) tmp[i]=ll[i]; for (i=32;i<64;i++) tmp[i]=rr[i-32]; for (i=0;i<64;i++) text[i]=tmp[_ip_tab[i]-1]; } static int e_r[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 }; static int P[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 }; static int SSS[16][4][16]= { 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, /* err on */ 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, /* err on */ 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, /* err on */ 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 }; void FF(int n, char *ll, char *rr, char *LL, char *RR) { int i; char buffer[64],tmp[64]; for (i=0;i<48;i++) buffer[i]=rr[e_r[i]-1]; for (i=0;i<48;i++) buffer[i]=(buffer[i]+K[n][i])&1; s_box(buffer,tmp); for (i=0;i<32;i++) buffer[i]=tmp[P[i]-1]; for (i=0;i<32;i++) RR[i]=(buffer[i]+ll[i])&1; for (i=0;i<3