DES加密程序代码有比较详细的讲解Word文档格式.docx
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而后，是初始置换表，逆初始置换表，S-Box等已知数据。
1.
//初始置换表IP
明文置换
2.int
IP_Table[64]
=
{
57,49,41,33,25,17,9,1,
3.
59,51,43,35,27,19,11,3,
4.
61,53,45,37,29,21,13,5,
63,55,47,39,31,23,15,7,
6.
56,48,40,32,24,16,8,0,
7.
58,50,42,34,26,18,10,2,
8.
60,52,44,36,28,20,12,4,
9.
62,54,46,38,30,22,14,6};
10.//逆初始置换表IP^-1
11.int
IP_1_Table[64]
{39,7,47,15,55,23,63,31,
12.
38,6,46,14,54,22,62,30,
13.
37,5,45,13,53,21,61,29,
14.
36,4,44,12,52,20,60,28,
15.
35,3,43,11,51,19,59,27,
16.
34,2,42,10,50,18,58,26,
17.
33,1,41,9,49,17,57,25,
18.
32,0,40,8,48,16,56,24};
19.
20.//扩充置换表E
21.int
E_Table[48]
{31,
0,
1,
2,
3,
4,
22.
4,
5,
6,
7,
8,
23.
8,9,10,11,12,
24.
11,12,13,14,15,16,
25.
15,16,17,18,19,20,
26.
19,20,21,22,23,24,
27.
23,24,25,26,27,28,
28.
27,28,29,30,31,
0};
29.
30.//置换函数P
S盒出来的32位进行移位
31.int
P_Table[32]
{15,6,19,20,28,11,27,16,
32.
0,14,22,25,4,17,30,9,
33.
1,7,23,13,31,26,2,8,
34.
18,12,29,5,21,10,3,24};
35.
36.//S盒
37.int
S[8][4][16]
=//S1
38.
{{{14,4,13,1,2,15,11,8,3,10,6,12,5,9,0,7},
39.
{0,15,7,4,14,2,13,1,10,6,12,11,9,5,3,8},
40.
{4,1,14,8,13,6,2,11,15,12,9,7,3,10,5,0},
41.
{15,12,8,2,4,9,1,7,5,11,3,14,10,0,6,13}},
42.
//S2
43.
{{15,1,8,14,6,11,3,4,9,7,2,13,12,0,5,10},
44.
{3,13,4,7,15,2,8,14,12,0,1,10,6,9,11,5},
45.
{0,14,7,11,10,4,13,1,5,8,12,6,9,3,2,15},
46.
{13,8,10,1,3,15,4,2,11,6,7,12,0,5,14,9}},
47.
//S3
48.
{{10,0,9,14,6,3,15,5,1,13,12,7,11,4,2,8},
49.
{13,7,0,9,3,4,6,10,2,8,5,14,12,11,15,1},
50.
{13,6,4,9,8,15,3,0,11,1,2,12,5,10,14,7},
51.
{1,10,13,0,6,9,8,7,4,15,14,3,11,5,2,12}},
52.
//S4
53.
{{7,13,14,3,0,6,9,10,1,2,8,5,11,12,4,15},
54.
{13,8,11,5,6,15,0,3,4,7,2,12,1,10,14,9},
55.
{10,6,9,0,12,11,7,13,15,1,3,14,5,2,8,4},
56.
{3,15,0,6,10,1,13,8,9,4,5,11,12,7,2,14}},
57.
//S5
58.
{{2,12,4,1,7,10,11,6,8,5,3,15,13,0,14,9},
59.
{14,11,2,12,4,7,13,1,5,0,15,10,3,9,8,6},
60.
{4,2,1,11,10,13,7,8,15,9,12,5,6,3,0,14},
61.
{11,8,12,7,1,14,2,13,6,15,0,9,10,4,5,3}},
62.
//S6
63.
{{12,1,10,15,9,2,6,8,0,13,3,4,14,7,5,11},
64.
{10,15,4,2,7,12,9,5,6,1,13,14,0,11,3,8},
65.
{9,14,15,5,2,8,12,3,7,0,4,10,1,13,11,6},
66.
{4,3,2,12,9,5,15,10,11,14,1,7,6,0,8,13}},
67.
//S7
68.
{{4,11,2,14,15,0,8,13,3,12,9,7,5,10,6,1},
69.
{13,0,11,7,4,9,1,10,14,3,5,12,2,15,8,6},
70.
{1,4,11,13,12,3,7,14,10,15,6,8,0,5,9,2},
71.
{6,11,13,8,1,4,10,7,9,5,0,15,14,2,3,12}},
72.
//S8
73.
{{13,2,8,4,6,15,11,1,10,9,3,14,5,0,12,7},
74.
{1,15,13,8,10,3,7,4,12,5,6,11,0,14,9,2},
75.
{7,11,4,1,9,12,14,2,0,6,10,13,15,3,5,8},
76.
{2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11}}};
77.//置换选择1
78.int
PC_1[56]
{56,48,40,32,24,16,8,
79.
0,57,49,41,33,25,17,
80.
9,1,58,50,42,34,26,
81.
18,10,2,59,51,43,35,
82.
62,54,46,38,30,22,14,
83.
6,61,53,45,37,29,21,
84.
13,5,60,52,44,36,28,
85.
20,12,4,27,19,11,3};
86.
87.//置换选择2
88.int
PC_2[48]
{13,16,10,23,0,4,2,27,
89.
14,5,20,9,22,18,11,3,
90.
25,7,15,6,26,19,12,1,
91.
40,51,30,36,46,54,29,39,
92.
50,44,32,46,43,48,38,55,
93.
33,52,45,41,49,35,28,31};
94.
95.//对左移次数的规定
96.int
MOVE_TIMES[16]
{1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
//初始置换表IP
intIP_Table[64]={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,
56,48,40,32,24,16,8,0,
58,50,42,34,26,18,10,2,
60,52,44,36,28,20,12,4,
62,54,46,38,30,22,14,6};
//逆初始置换表IP^-1
intIP_1_Table[64]={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,
32,0,40,8,48,16,56,24};
//扩充置换表E
intE_Table[48]={31,0,1,2,3,4,
3,4,5,6,7,8,
7,8,9,10,11,12,
11,12,13,14,15,16,
15,16,17,18,19,20,
19,20,21,22,23,24,
23,24,25,26,27,28,
27,28,29,30,31,0};
//置换函数P
intP_Table[32]={15,6,19,20,28,11,27,16,
0,14,22,25,4,17,30,9,
1,7,23,13,31,26,2,8,
18,12,29,5,21,10,3,24};
//S盒
intS[8][4][16]=//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},
//置换选择1
intPC_1[56]={56,48,40,32,24,16,8,
0,57,49,41,33,25,17,
9,1,58,50,42,34,26,
18,10,2,59,51,43,35,
62,54,46,38,30,22,14,
6,61,53,45,37,29,21,
13,5,60,52,44,36,28,
20,12,4,27,19,11,3};
//置换选择2
intPC_2[48]={13,16,10,23,0,4,2,27,
14,5,20,9,22,18,11,3,
25,7,15,6,26,19,12,1,
40,51,30,36,46,54,29,39,
50,44,32,46,43,48,38,55,
33,52,45,41,49,35,28,31};
//对左移次数的规定
intMOVE_TIMES[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
二、模块化。
对面向过程的程序，模块化是否清晰是至关重要的。
下面是函数的声明：
1.int
ByteToBit（ElemType
ch,ElemType
bit[8]）;
BitToByte（ElemType
bit[8],ElemType
*ch）;
3.int
Char8ToBit64（ElemType
ch[8],ElemType
bit[64]）;
4.int
Bit64ToChar8（ElemType
bit[64],ElemType
ch[8]）;
5.int
DES_MakeSubKeys（ElemType
key[64],ElemType
subKeys[16][48]）;
6.int
DES_PC1_Transform（ElemType
key[64],
ElemType
tempbts[56]）;
7.int
DES_PC2_Transform（ElemType
key[56],
tempbts[48]）;
8.int
DES_ROL（ElemType
data[56],
int
time）;
9.int
DES_IP_Transform（ElemType
data[64]）;
10.int
DES_IP_1_Transform（ElemType
DES_E_Transform（ElemType
data[48]）;
12.int
DES_P_Transform（ElemType
data[32]）;
13.int
DES_SBOX（ElemType
14.int
DES_XOR（ElemType
R[48],
L[48],int
count）;
15.int
DES_Swap（ElemType
left[32],ElemType
right[32]）;
16.int
DES_EncryptBlock（ElemType
plainBlock[8],
subKeys[16][48],
cipherBlock[8]）;
17.int
DES_DecryptBlock（ElemType
cipherBlock[8],
plainBlock[8]）;
18.int
DES_Encrypt（char
*plainFile,
*keyStr,char
*cipherFile）;
19.int
DES_Decrypt（char
*cipherFile,
*plainFile）;
intByteToBit（ElemTypech,ElemTypebit[8]）;
intBitToByte（ElemTypebit[8],ElemType*ch）;
intChar8ToBit64（ElemTypech[8],ElemTypebit[64]）;
intBit64ToChar8（ElemTypebit[64],ElemTypech[8]）;
intDES_MakeSubKeys（ElemTypekey[64],ElemTypesubKeys[16][48]）;
intDES_PC1_Transform（ElemTypekey[64],ElemTypetempbts[56]）;
intDES_PC2_Transform（ElemTypekey[56],ElemTypetempbts[48]）;
intDES_ROL（ElemTypedata[56],inttime）;
intDES_IP_Transform（ElemTypedata[64]）;
intDES_IP_1_Transform（ElemTypedata[64]）;
intDES_E_Transform（ElemTypedata[48]）;
intDES_P_Transform（ElemTypedata[32]）;
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