pepo2000：你要的DES代码来了

[牧牛人软件]

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

/***************************************
*<des_1.c> des encrypt program *
****************************************/
#include <stdio.h>
static unsigned char C[17][28],D[17][28],K[17][48],c,ch1;
static void expand0(unsigned char *, char *);
static void setkeystar(unsigned char *);
static void encrypt0(unsigned char*, unsigned char *);
static void discrypt0(unsigned char*, unsigned char *);
static void compress0(char* , unsigned char *);
static void compress016(char*,unsigned char*);
static void LS(char*, char*, int);
static void son(char *, char*, char *);
static void ip(unsigned char*, char*, char*);
static void _ip(unsigned char *, char*, char*);
static void F(int, char*, char*, char*, char*);
static void s_box(char*, char*);
static void HEX_2_DSP(char *, char *, int);
static void DSP_2_HEX(char*, char*, int);

void des(char * source, char * dest, char *key,int mode)
/* mode 0:加密 ; mode 1:解密 */
{
int i;

char tmp[64];
expand0(key,tmp);
setkeystar(tmp);
if (mode==0)
encrypt0(source,dest);
else
discrypt0(source,dest);
}



static void encrypt0(text,mtext)
unsigned char *text,*mtext;
{
char ll[64],rr[64],LL[64],RR[64];
char tmp[64];
int i,j;
ip(text,ll,rr);
for(i=1;i<17;i++)
{
F(i,ll,rr,LL,RR);
for (j=0;j<32;j++)
{
ll[j]=LL[j];
rr[j]=RR[j];
}
}
_ip(tmp,rr,ll);
compress0(tmp,mtext);
}


void Do_XOR(dest,source,size)
unsigned char *dest,*source;
int size;
{
int i;
for(i=0;i<size;i++)
dest[i]^=source[i];
}

static void DSP_2_HEX(dsp,hex,count)
char *dsp, *hex;
int count;
{
int i;
for(i=0;i<count;i++)
{
hex[i]=((dsp[i*2]<=0x39)?dsp[i*2]-0x30:dsp[i*2]-0x41+10);
hex[i]=hex[i]<<4;
hex[i]+=((dsp[i*2+1]<=0x39)?dsp[i*2+1]-0x30:dsp[i*2+1]-0x41+10);
}
} /*Defined already in iso.h*/
static void HEX_2_DSP(hex,dsp,count)
char *hex,*dsp;
int count;
{
int i;
char ch;
for (i=0;i<count;i++)
{
ch=(hex[i]&0xf0)>>4;
dsp[i*2]=(ch>9)?ch+0x41-10:ch+0x30;
ch=hex[i]&0xf;
dsp[i*2+1]=(ch>9)?ch+0x41-10:ch+0x30;
}
} /*Defined already in iso.h*/


static void discrypt0(mtext,text)
unsigned char *text,*mtext;
{
char ll[64],rr[64],LL[64],RR[64];
char tmp[64];
int i,j;
ip(mtext,ll,rr);
for(i=16;i>0;i--)
{
F(i,ll,rr,LL,RR);
for (j=0;j<32;j++)
{
ll[j]=LL[j];
rr[j]=RR[j];
}
}
_ip(tmp,rr,ll);
compress0(tmp,text);
}

static void expand0(in,out)
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;
if(divide==0 && j<7) printf("11***&&");
}
}
}

static void compress0(out,in)
unsigned char *in;
char *out;
{
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;
if(times==0 && j<7) printf("22***&&");

}
}
}

static void compress016(out,in)
unsigned char *in;
char *out;
{
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};
static void setkeystar(bits)
unsigned char bits[64];
{
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(C[j],C[j+1],ls_count[j]);
LS(D[j],D[j+1],ls_count[j]);
son(C[j+1],D[j+1],K[j+1]);
}
}

[牧牛人软件]

static void LS(bits,buffer,count)
char *bits;
int count;
char *buffer;
{
int i,j;
for(i=0;i<28;i++)
{
buffer[i]=bits[(i+count)%28];
}
}





static void son(cc,dd,kk)
char *cc,*dd,*kk;
{
int i,j;
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};
static void ip(text,ll,rr)
unsigned char *text;
char *ll,*rr;
{
int i,j;
char buffer[64];
char tmp[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];
}

static void _ip(text,ll,rr)
unsigned char *text;
char *ll,*rr;
{
int i,j;
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,/*error 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,/*error on*/
2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9,/*error on*/
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};
static void F(n,ll,rr,LL,RR)
char *ll,*rr,*LL,*RR;
int n;
{
int i,j;
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<32;i++)
LL[i]=rr[i];
}

static void s_box(aa,bb)
char *aa,*bb;
{
int i,j,k,m;int y,z;
char ss[9];
m=0;
for(i=0;i<8;i++)
{
j=6*i;
y=aa[j]*2+aa[j+5];
z=aa[j+1]*8+aa[j+2]*4+aa[j+3]*2+aa[j+4];
ss[i]=SSS[i][y][z];
y=0x08;
for(k=0;k<4;k++)
{
bb[m++]=(ss[i]/y)&1;
y/=2;
if(y==0 && k<3) printf("3y=%d",y);
}
}
}


void __fastcall TForm1::Button1Click(TObject *Sender)
{ // mode 0:加密
char dest[20];
des(Edit1->Text.c_str(), dest, Edit2->Text.c_str(),0);
Edit3->Text=dest;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button2Click(TObject *Sender)
{ // mode 1:解密
char dest[20];
des(Edit3->Text.c_str(), dest, Edit2->Text.c_str(),1);
Edit3->Text=dest;
}
//---------------------------------------------------------------------------

[chifengwatch]

收下

[牧牛人软件]

pepo2000:你怎么没反应啊？

[tccsdn]

呵呵，头都看晕了，先收下，以后用的着

[qibo999]

这种DES算法速度怎样？有没有适合加密大量数据的快速DES算法？

[oishi]

，先收下，以后用的着

[huang_jihua]

我也收下了

[gk0205]

mark

[kataboy]

不要紧我帮他收!