📄 des_h.h
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#define DEBUG
int IP[]={
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};
int E[]={
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};
int IP_1[]={
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 };
unsigned char S1[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},
{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}
};
unsigned char S2[4][16]={
{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}
};
unsigned char S3[4][16]={
{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}
};
unsigned char S4[4][16]={
{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}
};
unsigned char S5[4][16]={
{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}
};
unsigned char S6[4][16]={
{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}
};
unsigned char S7[4][16]={
{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}
};
unsigned char S8[4][16]={
{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}
};
int P[]={
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};
int PC_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};
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};
int LS[]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
unsigned char CONST1[]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01};
unsigned char CONST2[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
/**********Byte8To64Bit**********/
// Function Name: Byte8To64Bit
// 传入参数: Byte[8]
// 功能：将传入的8bytes 转为64bits (binary type)
// 传出参数:Bit[64]
// 返回值: void
/********************************/
void Byte8To64Bit(unsigned char Byte[8],unsigned char Bit[64])
{
int i,j;
for(i=0;i<8;i++)
{
for(j=0;j<8;j++)
{
/* if((Bit[i] & CONST1[j]) == CONST1[j])
Byte[i*8+j]=0x01;
*/
//如果对应的位为1，则分别将对应的位置为0x01
//CONST1[i]==>0x80, 0x40, 0x20, 0x10, 0x08, 0x04,0x02,0x01
//Decimal 128 64 32 16 8 4 2 1
//Binary 111111111 11111111 111111 11111 1111 111 11 1
if((*(Byte+i) & *(CONST1+j)) == *(CONST1+j))
*(Bit+i*8+j) = 0x01;
}
}
}
/**********Bit64To8Byte**********/
// Function Name: Bit64To8Byte
// 传入参数: Bit[64]
// 功能：将传入的64bits 转为8bytes
// 传出参数:Byte[8]
// 返回值: void
/********************************/
void Bit64To8Byte(unsigned char Bit[64],unsigned char Byte[8])
{
int i,j;
for(i=0;i<8;i++)
{
for(j=0;j<8;j++)
{
if(*(Bit+8*i+j) == 0x01)
*(Byte+i) |= *(CONST1+j);
else *(Byte+i) &= *(CONST2+j);
/*
if(Byte[8*i+j] == 0x01)
Bit[i] |= CONST1[j];
else Bit[i] &= CONST2[j];
*/
}
}
}
/**********BuildKey**********/
// Function Name: BuildKey
// 传入参数: origokey[8]
// 功能：由传入的origokey经过位移后得K1，K2...K16(每个key为48位),
// 存于key[i]中
// 传出参数:key[16][8]
// 返回值: void
/********************************/
void BuildKey(unsigned char origokey[8],unsigned char key[16][8])
{
int i,j,k;
unsigned char Bit64[64];
unsigned char Swap_Bit[64];
unsigned char Key_Bit[16][64];
unsigned char C0[28],D0[28];
unsigned char c_tmp,d_tmp;
memset(Bit64,0,64);
memset(Swap_Bit,0,sizeof(Swap_Bit));
memset(Key_Bit,0,sizeof(Key_Bit));
memset(C0,0,28);
memset(D0,0,28);
Byte8To64Bit(origokey,Bit64);
//pc-1
/*
#ifdef DEBUG
printf("\n");
for(i=0;i<64;i++)
printf("%d",Bit64[i]);
printf("\n");
#endif
*/
// PC-1
for(i=0;i<56;i++)
{
if(i<28)
C0[i]=Bit64[PC_1[i]-1];
else
D0[i-28]=Bit64[PC_1[i]-1];
}
/*
#ifdef DEBUG
for(i=0;i<56;i++)
{
if(i<28)
printf("%d",C0[i]);
else printf("%d",D0[i-28]);
}
printf("\n");
#endif
*/
for(i=0;i<16;i++){
for(j=0;j<LS[i];j++){
c_tmp=C0[0];
d_tmp=D0[0];
for(k=0;k<27;k++)
{
C0[k]=C0[k+1];
D0[k]=D0[k+1];
}
C0[27]=c_tmp;
D0[27]=d_tmp;
}
for(k=0;k<56;k++)
{
if(k<28)
Swap_Bit[k]=C0[k];
else Swap_Bit[k]=D0[k-28];
}
// PC-2
for(k=0;k<48;k++)
Key_Bit[i][k]=Swap_Bit[PC_2[k]-1];
}
/*
#ifdef DEBUG
printf("\n");
for(i=0;i<16;i++)
{
for(k=0;k<48;k++)
printf("%d",Key_Bit[i][k]);
printf("\n");
}
printf("\n");
#endif
*/
for(i=0;i<16;i++)
Bit64To8Byte(Key_Bit[i],key[i]);
/*
#ifdef DEBUG
printf("\n");
for(i=0;i<16;i++)
for(j=0;j<8;j++)
printf("%c",key[i][j]);
printf("\n");
#endif
*/
}
/***********Expand**********/
// Function Name: Expand
// 传入参数: orig(32bits)
// 功能：将传入的32bit扩展为48bit,
// 传出参数:Ex[48](48bits)
// 返回值: void
/********************************/
void Expand(unsigned char *orig,unsigned char Ex[48])
{
int i;
for(i=0;i<48;i++)
Ex[i]=orig[E[i]-1];
}
/***********Bit64To32Bit**********/
// Function Name: Bit64To32Bit
// 传入参数: Bit64
// 功能：将传入的64bit均分为8bit,
// 把高4位截去(eg:00001011=>1011)
// 传出参数:Bit32
// 返回值: void
/********************************/
void Bit64To32Bit(unsigned char *Bit64,unsigned char *Bit32)
{
int i;
for(i=0;i<8;i++)
memcpy(Bit32+i*4,Bit64+i*8+4,4);
}
/***********S_Box**********/
// Function Name: S_Box
// 传入参数: Ex[48]
// 功能：将传入的48bits，经过S盒压缩替换为32bits
// 传出参数:S_Bit[32]
// 返回值: void
/********************************/
void S_Box(unsigned char Ex[48],unsigned char S_Bit[32])
{
int i,j;
unsigned char row=0,col=0;
unsigned char s_tmp[8];
unsigned char tmp[6];
unsigned char RowCol_Bit[64];
unsigned char RowCol_Byte[8];
//unsigned char Result[32];
memset(tmp,0,6);
memset(s_tmp,0,8);
for(i=0;i<8;i++)
{
memset(RowCol_Bit,0,64);
memset(RowCol_Byte,0,8);
memcpy(tmp,Ex+6*i,6);
RowCol_Bit[6]=tmp[0];
RowCol_Bit[7]=tmp[5];
//取头尾2位组成S盒的行
Bit64To8Byte(RowCol_Bit,RowCol_Byte);
row=RowCol_Byte[0];
memset(RowCol_Bit,0,16);
memcpy(RowCol_Bit+4,tmp+1,4);
//取中间4位组成S盒的列
Bit64To8Byte(RowCol_Bit,RowCol_Byte);
col=RowCol_Byte[0];
//由行和列查对应的S盒
switch(i)
{
case 0:
s_tmp[i]=S1[row][col];
break;
case 1:
s_tmp[i]=S2[row][col];
break;
case 2:
s_tmp[i]=S3[row][col];
break;
case 3:
s_tmp[i]=S4[row][col];
break;
case 4:
s_tmp[i]=S5[row][col];
break;
case 5:
s_tmp[i]=S6[row][col];
break;
case 6:
s_tmp[i]=S7[row][col];
break;
case 7:
s_tmp[i]=S8[row][col];
break;
}
}
memset(RowCol_Bit,0,64);
Byte8To64Bit(s_tmp,RowCol_Bit);
/*
#ifdef DEBUG
printf("\n S_R Bit:\n");
for(i=0;i<63;i++)
printf("%d",RowCol_Bit[i]);
printf("\n");
#endif
*/
Bit64To32Bit(RowCol_Bit,S_Bit);//clean high 4bit(0000)
}
void Encode(unsigned char orig_str[8],unsigned char orig_pass[8],unsigned char encode_str[8])
{
unsigned char KEY[16][8];//48 bit(6byte)密码
unsigned char Origo_Bit[64];
unsigned char Swap_Bit[64];
unsigned char LBit[64],RBit[64];
unsigned char LBYTE[17][8],RBYTE[17][8];
unsigned char tmpByte[8];
unsigned char Ex_Bit[64],SBOX_Bit[32];
unsigned char Pass_Bit[64];
int i,j;
memset(Origo_Bit,0,64);
memset(Swap_Bit,0,64);
memset(LBit,0,sizeof(LBit));
memset(LBYTE,0,sizeof(LBYTE));
memset(RBYTE,0,sizeof(RBYTE));
memset(tmpByte,0,8);
//get key
BuildKey(orig_pass,KEY);
Byte8To64Bit(orig_str,Origo_Bit);
//ip swap
for(i=0;i<64;i++)
Swap_Bit[i]=Origo_Bit[IP[i]-1];
//将IP排列后的64bit一分为二,RBYTE=4byte,LBYTE=4BYTE;
Bit64To8Byte(Swap_Bit,tmpByte);
/*
#ifdef DEBUG
printf("\n Ip swap later:\n");
for(i=0;i<8;i++)
printf("%c",tmpByte[i]);
printf("\n");
#endif
*/
memcpy(LBYTE[0],tmpByte,4);
memcpy(RBYTE[0],tmpByte+4,4);
//进行16次乘积变换()
for(i=0;i<16;i++)
{
memcpy(LBYTE[i+1],RBYTE[i],4);//L(i)=R(i-1)
memset(tmpByte,0,8);
memset(RBit,0,sizeof(RBit));
Byte8To64Bit(RBYTE[i],RBit);
/*
#ifdef DEBUG
printf("\nRBit:\n");
for(j=0;j<64;j++)
printf("%d",RBit[j]);
printf("\n");
#endif */
memset(Ex_Bit,0,64);
Expand(RBit,Ex_Bit);
memset(RBYTE[i],0,8);
Bit64To8Byte(Ex_Bit,RBYTE[i]);
/*
#ifdef DEBUG
printf("\n Expand RBYTE[%d] :",i);
for(j=0;j<8;j++)
printf("%c",tmpByte[j]);
printf("\n");
#endif */
//xor R0(48bit) XOR KEY[i]
memset(Ex_Bit,0,64);
for(j=0;j<6;j++)
RBYTE[i][j] ^= KEY[i][j];
Byte8To64Bit(RBYTE[i],Ex_Bit);
/*
#ifdef DEBUG
printf("\n Ex_Bit:\n");
for(j=0;j<64;j++)
printf("%d",Ex_Bit[j]);
printf("\n");
#endif
#ifdef DEBUG
printf("\n KEY[%d]:",i);
for(j=0;j<8;j++)
printf("%c",KEY[i][j]);
printf("\n RBYTE0: ");
for(j=0;j<8;j++)
printf("%c",RBYTE[0][j]);
printf("\n");
#endif*/
memset(SBOX_Bit,0,32);
S_Box(Ex_Bit,SBOX_Bit);
memset(RBit,0,64);
for(j=0;j<32;j++)
RBit[j]=SBOX_Bit[P[j]-1];//p排列
/*
#ifdef DEBUG
printf("\n RBIT:\n");
for(j=0;j<32;j++)
printf("%d",RBit[j]);
printf("\n");
#endif
*/ memset(RBYTE[i],0,8);
Bit64To8Byte(RBit,RBYTE[i]);
//32bit == 4 byte
for(j=0;j<4;j++)
RBYTE[i+1][j]=LBYTE[i][j] ^ RBYTE[i][j];
/*
#ifdef DEBUG
printf("\n RBYTE[%d]: ",i);
for(j=0;j<4;j++)
printf("%c",RBYTE[i][j]);
printf(" LBYTE[%d]",i);
for(j=0;j<4;j++)
printf("%c",LBYTE[i][j]);
//printf("\n");
#endif
*/
}
memset(tmpByte,0,8);
memcpy(tmpByte,RBYTE[16],4);
memcpy(tmpByte+4,LBYTE[16],4);
/*
printf("\n tmpByte:");
for(j=0;j<8;j++)
printf("%c",tmpByte[j]);
printf("\n");*/
memset(Swap_Bit,0,64);
Byte8To64Bit(tmpByte,Swap_Bit);
memset(Pass_Bit,0,64);
for(i=0;i<64;i++)
Pass_Bit[i]=Swap_Bit[IP_1[i]-1];
Bit64To8Byte(Pass_Bit,encode_str);
}
void Uncode(unsigned char orig_str[8],unsigned char orig_pass[8],unsigned char uncode_str[8])
{
unsigned char KEY[16][8];//48 bit(6byte)密码
unsigned char Origo_Bit[64];
unsigned char Swap_Bit[64];
unsigned char LBit[64],RBit[64];
unsigned char LBYTE[17][8],RBYTE[17][8];
unsigned char tmpByte[8];
unsigned char Ex_Bit[64],SBOX_Bit[32];
unsigned char Pass_Bit[64];
int i,j;
memset(Origo_Bit,0,64);
memset(Swap_Bit,0,64);
memset(LBit,0,sizeof(LBit));
memset(LBYTE,0,sizeof(LBYTE));
memset(RBYTE,0,sizeof(RBYTE));
memset(tmpByte,0,8);
//get key
BuildKey(orig_pass,KEY);
Byte8To64Bit(orig_str,Origo_Bit);
//ip swap
for(i=0;i<64;i++)
Swap_Bit[i]=Origo_Bit[IP[i]-1];
//将IP排列后的64bit一分为二,RBYTE=4byte,LBYTE=4BYTE;
Bit64To8Byte(Swap_Bit,tmpByte);
memcpy(RBYTE[16],tmpByte,4);
memcpy(LBYTE[16],tmpByte+4,4);
//进行16次乘积变换()
for(i=16;i>0;i--)
{
memcpy(RBYTE[i-1],LBYTE[i],4);//R(i-1)=L(i)
memset(tmpByte,0,8);
memset(LBit,0,sizeof(LBit));
Byte8To64Bit(LBYTE[i],LBit);
memset(Ex_Bit,0,64);
Expand(LBit,Ex_Bit);
memset(LBYTE[i],0,8);
Bit64To8Byte(Ex_Bit,LBYTE[i]);
//xor R0(48bit) XOR KEY[i]
memset(Ex_Bit,0,64);
for(j=0;j<6;j++)
LBYTE[i][j] ^= KEY[i-1][j];
Byte8To64Bit(LBYTE[i],Ex_Bit);
memset(SBOX_Bit,0,32);
S_Box(Ex_Bit,SBOX_Bit);
memset(LBit,0,64);
for(j=0;j<32;j++)
LBit[j]=SBOX_Bit[P[j]-1];//p排列
memset(LBYTE[i],0,8);
Bit64To8Byte(LBit,LBYTE[i]);
//32bit == 4 byte
for(j=0;j<4;j++)
LBYTE[i-1][j]=RBYTE[i][j] ^ LBYTE[i][j];
}
memset(tmpByte,0,8);
memcpy(tmpByte,LBYTE[0],4);
memcpy(tmpByte+4,RBYTE[0],4);
memset(Swap_Bit,0,64);
Byte8To64Bit(tmpByte,Swap_Bit);
memset(Pass_Bit,0,64);
for(i=0;i<64;i++)
Pass_Bit[i]=Swap_Bit[IP_1[i]-1];
Bit64To8Byte(Pass_Bit,uncode_str);
}
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