/*des.c*/
#include
#include
#include
#define TRUE 1
#define FALSE 0
struct parm {
char keya[8];
int ekey[16][48];
int dkey[16][48];
} *parmp;
static int desargorithm(unsigned char *inparm, unsigned char *outparm,
struct parm *pmp, int encrypt);
static void morioip(char *inarea);
static void moriof(int j);
static void morioe();
static void morios();
static void moriop();
static void morioiip();
static void AUOC050(unsigned char *getkey, struct parm *pmp);
static void moriomkey(char *key64, struct parm *pmp);
static void moriopc1(char *key64, int *l28, int *r28);
static void moriolshift(int *l28, int *r28, int j);
static void moriopc2(struct parm *pmp, int *l28, int *r28, int jj);
static void morioinparam(char *getkey, char *key64);
static int tabip_t[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 tabllP_t[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 int tabe_t[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 tabs_t[8][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 }
},
{{
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 }
},
{{
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 }
},
{{
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 int tabp_t[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 tabpc1_t[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};
static int tabnls_t[16]={
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
static int tabtabpc2_t[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 l_[32],r_[32],frk_[32],e_[48],srk_[48],so_[8];
static int tttpc1_t[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};
static int tttnls_t[16]={
1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
static int ttttabpc2_t[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 char *outarea;
int desargorithm(unsigned char *inparm, unsigned char *outparm,
struct parm *pmp, int encrypt)
{
int count=0;
int count2=0;
int w, j, k;
parmp = pmp;
outarea = (char*)outparm;
morioip((char*)inparm);
for (j=0; j<16; j++) {
if(encrypt) moriof(j);
else moriof(15-j);
for (k=0; k<32; k++) {
w = l_[k];
l_[k] = r_[k];
r_[k] = w ^ frk_[k];
}
}
morioiip();
return 0;
}
void morioip(char *inarea)
{
int j,k,dl,wk[64];
for (j=0; j<8; j++) {
dl = inarea[j];
for (k=0; k<8; k++) {
wk[8*j+k] = dl>>(7-k) & 1;
}
}
for (j=0; j<64; j++) {
dl = tabip_t[j]-1;
if (j<32)
l_[j] = wk[dl];
else
r_[j-32] = wk[dl];
}
return;
}
void moriof(int j)
{
int k;
morioe();
for (k=0; k<48; k++) {
srk_[k] = e_[k] ^ parmp->ekey[j][k];
}
morios();
moriop();
return;
}
void morioe()
{
int k, el;
for (k=0; k<48; k++) {
el = tabe_t[k] - 1;
e_[k] = r_[el];
}
return;
}
void morios()
{
int j, k, l, x, y;
for (j=0; j<8; j++) {
k = j * 6;
y = srk_[k] << 1 | srk_[k+5];
x = 0;
for (l=1; l<=4; l++) {
x |= srk_[k+l]<<(4-l);
}
so_[j] = tabs_t[j][y][x];
}
return;
}
void moriop()
{
int wk[32], j, k, pl;
for (j=0; j<8; j++) {
pl = so_[j];
for (k=0; k<4; k++) {
wk[4*j+k] = pl>>(3-k) & 1;
}
}
for (j=0; j<32; j++) {
pl = tabp_t[j] - 1;
frk_[j] = wk[pl];
}
return;
}
void morioiip()
{
int lr_[64], wk[64], j, k, dl;
for (k=0; k<64; k++) {
if (k<32)
lr_[k] = r_[k];
else
lr_[k] = l_[k-32];
}
for (k=0; k<64; k++) {
dl = tabllP_t[k]-1;
wk[k] = lr_[dl];
}
for (j=0; j<8; j++) {
outarea[j] = 0;
for (k=0; k<8; k++) {
outarea[j] |= wk[8*j+k] << (7-k);
}
}
return;
}
void AUOC050(unsigned char *getkey, struct parm *pmp)
{
char key64[64];
memcpy(pmp->keya,getkey,8);
morioinparam((char*)getkey, key64);
moriomkey(key64, pmp);
return;
}
void moriomkey(char *key64, struct parm *pmp)
{
int j;
int l28[30], r28[30];
moriopc1(key64,l28, r28);
for(j=0; j<16; j++) {
moriolshift(l28, r28, j);
moriopc2(pmp, l28, r28, j);
}
return;
}
void moriopc1(char *key64, int *l28, int *r28)
{
int j, k;
for(j=0; j<56; j++) {
k = tttpc1_t[j] -1;
if (j < 28) {
l28[j] = (int)key64[k];
}
else {
r28[j-28] = (int)key64[k];
}
}
return;
}
void moriolshift(int *l28, int *r28, int j)
{
int k, s;
s = tttnls_t[j];
l28[28] = l28[0];
r28[28] = r28[0];
l28[29] = l28[1];
r28[29] = r28[1];
for(k=0; k<28; k++) {
l28[k] = l28[k+s];
r28[k] = r28[k+s];
}
return;
}
void moriopc2(struct parm *pmp, int *l28, int *r28, int jj)
{
int wk[56], k, p2;
for(k=0; k<56; k++) {
if (k < 28)
wk[k] = l28[k];
else
wk[k] = r28[k-28];
}
for(k=0; k<48; k++) {
p2 = ttttabpc2_t[k] - 1;
pmp->ekey[jj][k] = wk[p2];
}
return;
}
void morioinparam(char *getkey, char *key64)
{
int i, k, k1;
for (i=0; i<8; i++) {
k1 = getkey[i];
for (k=0; k<8; k++) {
key64[8*i+k] = k1 >>(7-k) & 1;
}
}
return;
}
/*****************************************************************************
* Name : des_encode
* Descripe:
* 对in进行DES加密运算，并返回运算结果
* Paramater:
* [in]des_key : 加密的密钥
* [in]in : 要加密的数据
* [out]out : 加密后的数据
* Return value:无
*****************************************************************************/
void des_encode(unsigned char des_key[8], unsigned char *in, unsigned char *out)
{
struct parm key_area;
AUOC050(des_key, &key_area);
desargorithm(in, out, &key_area, TRUE);
return;
}
/*****************************************************************************
* Name : des_decode
* Descripe:
* 对in进行DES解密运算，并返回运算结果
* Paramater:
* [in]des_key : 解密的密钥
* [in]in : 要解密的数据
* [out]out : 解密后的数据
* Return value:无
*****************************************************************************/
void des_decode(unsigned char des_key[8], unsigned char *in, unsigned char *out)
{
struct parm key_area;
AUOC050(des_key, &key_area);
desargorithm(in, out, &key_area, FALSE);
return;
}
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