c语言的简单加密

#include <stdioh>#include <mathh>

int main()

{

char a[10];

int i=0;

while(getchar()!='\n')

{

a[i++]=getchar(); //错误在这里，上一句while(getchar()!='\n')，如果读入字符不是回车

} //那么再读入一个字符，赋给数组里的元素。也就是说，每两个字符

a[i]='\n'; //能读入第二个字符。如果读入奇数个字符，则无法结束程序。

i=0;

do

{

printf("%c",a[i++]+4);

}

while(a[i]!='\n');

}

修改如下，运行OK：

#include <stdioh

int main()

{

char a;

int i=0;

while((a=getchar())!='\n')

{

printf("%c",a+4);

}

printf("\n");

}

#include "memoryh"

#include "stdioh"

enum {ENCRYPT,DECRYPT};// ENCRYPT:加密,DECRYPT:解密

void Des_Run(char Out[8], char In[8], bool Type=ENCRYPT);

// 设置密钥

void Des_SetKey(const char Key[8]);

static void F_func(bool In[32], const bool Ki[48]);// f 函数

static void S_func(bool Out[32], const bool In[48]);// S 盒代替

// 变换

static void Transform(bool Out, bool In, const char Table, int len);

static void Xor(bool InA, const bool InB, int len);// 异或

static void RotateL(bool In, int len, int loop);// 循环左移

// 字节组转换成位组

static void ByteToBit(bool Out, const char In, int bits);

// 位组转换成字节组

static void BitToByte(char Out, const bool In, int bits);

//置换IP表

const static char IP_Table[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

};

//逆置换IP-1表

const static char IPR_Table[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

};

//E位选择表

static const char E_Table[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

};

//P换位表

const static char P_Table[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

};

//PC1选位表

const static char PC1_Table[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

};

//PC2选位表

const static char PC2_Table[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

};

//左移位数表

const static char LOOP_Table[16] = {

1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1

};

// S盒

const static char S_Box[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,

2,1,14,7,4,10,8,13,15,12,9,0,3,5,6,11

};

static bool SubKey[16][48];// 16圈子密钥

void Des_Run(char Out[8], char In[8], bool Type)

{

static bool M[64], Tmp[32], Li = &M[0], Ri = &M[32];

ByteToBit(M, In, 64);

Transform(M, M, IP_Table, 64);

if( Type == ENCRYPT ){

for(int i=0; i<16; i++) {

memcpy(Tmp, Ri, 32);

F_func(Ri, SubKey[i]);

Xor(Ri, Li, 32);

memcpy(Li, Tmp, 32);

}

}else{

for(int i=15; i>=0; i--) {

memcpy(Tmp, Li, 32);

F_func(Li, SubKey[i]);

Xor(Li, Ri, 32);

memcpy(Ri, Tmp, 32);

}

}

Transform(M, M, IPR_Table, 64);

BitToByte(Out, M, 64);

}

void Des_SetKey(const char Key[8])

{

static bool K[64], KL = &K[0], KR = &K[28];

ByteToBit(K, Key, 64);

Transform(K, K, PC1_Table, 56);

for(int i=0; i<16; i++) {

RotateL(KL, 28, LOOP_Table[i]);

RotateL(KR, 28, LOOP_Table[i]);

Transform(SubKey[i], K, PC2_Table, 48);

}

}

void F_func(bool In[32], const bool Ki[48])

{

static bool MR[48];

Transform(MR, In, E_Table, 48);

Xor(MR, Ki, 48);

S_func(In, MR);

Transform(In, In, P_Table, 32);

}

void S_func(bool Out[32], const bool In[48])

{

for(char i=0,j,k; i<8; i++,In+=6,Out+=4) {

j = (In[0]<<1) + In[5];

k = (In[1]<<3) + (In[2]<<2) + (In[3]<<1) + In[4];

ByteToBit(Out, &S_Box[i][j][k], 4);

}

}

void Transform(bool Out, bool In, const char Table, int len)

{

static bool Tmp[256];

for(int i=0; i<len; i++)

Tmp[i] = In[ Table[i]-1 ];

memcpy(Out, Tmp, len);

}

void Xor(bool InA, const bool InB, int len)

{

for(int i=0; i<len; i++)

InA[i] ^= InB[i];

}

void RotateL(bool In, int len, int loop)

{

static bool Tmp[256];

memcpy(Tmp, In, loop);

memcpy(In, In+loop, len-loop);

memcpy(In+len-loop, Tmp, loop);

}

void ByteToBit(bool Out, const char In, int bits)

{

for(int i=0; i<bits; i++)

Out[i] = (In[i/8]>>(i%8)) & 1;

}

void BitToByte(char Out, const bool In, int bits)

{

memset(Out, 0, (bits+7)/8);

for(int i=0; i<bits; i++)

Out[i/8] |= In[i]<<(i%8);

}

void main()

{

char key[8]={1,9,8,0,9,1,7,2},str[]="Hello";

puts("Before encrypting");

puts(str);

Des_SetKey(key);

Des_Run(str, str, ENCRYPT);

puts("After encrypting");

puts(str);

puts("After decrypting");

Des_Run(str, str, DECRYPT);

puts(str);

}

#include<stdioh>

#include<stringh>

#include<stdlibh>

main()

{

void sc(char fp,char key,int Flen,int Klen);

FILE fp;

char pBuf,filename[20],key[20],ch;

printf("请输入选择：A、加密 B、解密 C退出\n");

ch=getchar();

while(ch!='c'&&ch!='C')

{

if(ch=='a'||ch=='A'||ch=='b'||ch=='B')

{

printf("请输入要打开的文件名：\n");

scanf("%s",filename);

if((fp=fopen(filename,"rb"))==NULL)

{printf("无法打开文件，请注意输入后缀！\n");<br/> exit(0);<br/> }

fseek(fp,0,SEEK_END);

int len=ftell(fp);

pBuf=new char[len+1];

rewind(fp);

fread(pBuf,1,len,fp);

pBuf[len]=0;

printf("%s\n",pBuf);

fclose(fp);

printf("请输入加密/解密的密码：\n");

scanf("%s",key);

sc(pBuf,key,len,strlen(key));

printf("请输入保存加密文件的文件名：\n");

scanf("%s",filename);

if((fp=fopen(filename,"wb"))==NULL)

{printf("无法保存文件，请注意磁盘是否已满！\n");<br/> exit(0);<br/> }

else

fwrite(pBuf,1,len,fp);

fclose(fp);

printf("请输入选择：A、加密 B、解密 C退出\n");

}

else {

printf("输入错误，请重新输入\n");

}

ch=getchar();

ch=getchar();

}

}

void sc(char fp,char key,int Flen,int Klen)

{int i,j,k;<br/>for(i=0;i<Flen;i+=Klen)<br/>for(j=i,k=0;k<Klen;j++,k++)<br/>fp[j]^=key[k];<br/><br/>fp[i]='\0';<br/>printf("%s\n",fp);<br/>}

////这个是我前些日子无聊至急写的超简单超烂 异或加

////密程序 你改改看! 或许可以满足你的要求!

/// 我的51空间里:>

//读取缓冲区的指定位

#define GET_BIT(p_array, bit_index) ((p_array[(bit_index) >> 3] >> (7 - ((bit_index) & 0x07))) & 0x01)

//设置缓冲区的指定位

#define SET_BIT(p_array,bit_index,bit_val) if(1==(bit_val))\

{p_array[(bit_index)>>3]|=0x01 << (7 - ((bit_index)&0x07));}else {p_array[(bit_index)>>3]&=~(0x01<<(7 - ((bit_index)&0x07)));}

//加解密标识，这两个标识涉及到对表的读取位置,

//必须保证DES_ENCRYPT = 0 DES_DECRYPT = 1

CONST uint8 Table_IP[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

};

// 末置换

CONST uint8 Table_InverseIP[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

};

// 扩展置换

CONST uint8 Table_E[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

};

// 密钥初始置换

CONST uint8 Table_PC1[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

};

// 左右移运算

CONST signed char Table_Move[2][16] =

{

//加密左移

{1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1},

//解密右移

{0, -1, -2, -2, -2, -2, -2, -2, -1, -2, -2, -2, -2, -2, -2, -1}

};

// 密钥压缩置换

CONST uint8 Table_PC2[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

};

// S盒

CONST uint8 Table_SBOX[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,

2, 1, 14, 7, 4, 10, 8, 13, 15, 12, 9, 0, 3, 5, 6, 11

};

// P盒置换

CONST uint8 Table_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

};

//对两块大小相同的内存区进行异或

//异或结果保存到第一块内存

//uint8 p_buf_1 内存区1

//const uint8 p_buf_2 内存区2

//uint8 bytes 内存区大小(单位：字节)

void Xor(uint8 p_buf_1, uint8 p_buf_2, uint8 bytes)

{

while(bytes > 0)

{

bytes--;

p_buf_1[bytes] ^= p_buf_2[bytes];

}

}

//将缓冲区从第bit_start位到第bit_end进行循环左移

//offset只能是1，2

//本段代码还可以优化。

void move_left(uint8 p_input, uint8 bit_start, uint8 bit_end, uint8 offset)

{

uint8 IDATA b_val = 0;

uint8 IDATA b_tmp1 = 0;

uint8 IDATA b_tmp2 = 0;

//读取bit_start位

b_tmp1 = GET_BIT(p_input, bit_start);

b_tmp2 = GET_BIT(p_input, bit_start + 1);

//循环左移offset位

for(; bit_start <= (bit_end - offset); bit_start++)

{

b_val = GET_BIT(p_input, bit_start + offset);

SET_BIT(p_input, bit_start, b_val);

}

//将bit_start开始的offset位移到bit_end后头来

if (1 == offset)

{

SET_BIT(p_input, bit_end, b_tmp1);

}

else

{

SET_BIT(p_input, bit_end, b_tmp2);

SET_BIT(p_input, bit_end - 1, b_tmp1);

}

}

//将缓冲区从第bit_start位到第bit_end进行循环右移

//offset只能是1，2

//本段代码在性能上还可以优化。

void move_right(uint8 p_input, uint8 bit_start, uint8 bit_end, uint8 offset)

{

uint8 IDATA b_val = 0;

uint8 IDATA b_tmp1 = 0;

uint8 IDATA b_tmp2 = 0;

//读取bit_end位

b_tmp1 = GET_BIT(p_input, bit_end);

b_tmp2 = GET_BIT(p_input, bit_end - 1);

//循环左移offset位

for(; bit_end >= (bit_start + offset); bit_end--)

{

b_val = GET_BIT(p_input, bit_end - offset);

SET_BIT(p_input, bit_end, b_val);

}

//将bit_end倒数的offset位移到bit_start来

if (1 == offset)

{

SET_BIT(p_input, bit_start, b_tmp1);

}

else

{

SET_BIT(p_input, bit_start, b_tmp2);

SET_BIT(p_input, bit_start + 1, b_tmp1);

}

}

//缓冲区移位

//offset大于0时左移

//offset小于0时右移

void move_bits(uint8 p_input, uint8 bit_start, uint8 bit_end, char offset)

{

if(0 < offset) //左移

{

move_left(p_input, bit_start, bit_end, offset);

}

else if(0 > offset) //右移

{

move_right(p_input, bit_start, bit_end, -offset);

}

}

//通用置换函数, bits <= 64

//p_input与p_output不能指向同一个地址，否则置换会出错。

void Permutation(uint8 p_input, uint8 p_output, uint8 Table, uint8 bits)

{

uint8 IDATA b_val = FALSE;

uint8 IDATA bit_index = 0;

for(bit_index = 0; bit_index < bits; bit_index++)

{

b_val = GET_BIT(p_input, Table[bit_index] - 1);

SET_BIT(p_output, bit_index, b_val);

}

}

//获取从bit_s为起始的第1, 6 位组成行

uint8 S_GetLine(uint8 p_data_ext, uint8 bit_s)

{

return (GET_BIT(p_data_ext, bit_s + 0) << 1) + GET_BIT(p_data_ext, bit_s + 5);

}

//获取从bit_s为起始的第2,3,4,5位组成列

uint8 S_GetRow(uint8 p_data_ext, uint8 bit_s)

{

uint8 IDATA row;

//2,3,4,5位组成列

row = GET_BIT(p_data_ext, bit_s + 1);

row <<= 1;

row += GET_BIT(p_data_ext, bit_s + 2);

row <<= 1;

row += GET_BIT(p_data_ext, bit_s + 3);

row <<= 1;

row += GET_BIT(p_data_ext, bit_s + 4);

return row;

}

///////////////////////////////////////////////////////////////

// 函 数 名 : des

// 函数功能 : DES加解密

// 处理过程 : 根据标准的DES加密算法用输入的64位密钥对64位密文进行加/解密

// 并将加/解密结果存储到p_output里

// 返 回 值 :

// 参数说明 : const char p_data 输入, 加密时输入明文, 解密时输入密文, 64位(8字节)

// const char p_key 输入, 密钥, 64位(8字节)

// char p_output 输出, 加密时输出密文, 解密时输入明文, 64位(8字节)

// uint8 mode DES_ENCRYPT 加密 DES_DECRYPT 解密

///////////////////////////////////////////////////////////////

void des( unsigned char p_data, unsigned char p_key, unsigned char p_output, unsigned char InVet,DES_MODE mode)

{

uint8 IDATA loop = 0; //16轮运算的循环计数器

uint8 XDATA key_tmp[8]; //密钥运算时存储中间结果

uint8 XDATA sub_key[6]; //用于存储子密钥

uint8 p_left;

uint8 p_right;

uint8 XDATA p_right_ext[8]; //R[i]经过扩展置换生成的48位数据(6字节), 及最终结果的存储

uint8 XDATA p_right_s[4]; //经过S_BOX置换后的32位数据(4字节)

uint8 IDATA s_loop = 0; //S_BOX置换的循环计数器

//CBC

for(loop = 0; loop < 8; loop++) p_data[loop]^=InVet[loop];

//密钥第一次缩小换位, 得到一组56位的密钥数据

Permutation(p_key, key_tmp, Table_PC1, 56);

//明文初始化置换

Permutation(p_data, p_output, Table_IP, 64);

p_left = p_output; //L0

p_right = &p_output[4]; //R0

for(loop = 0; loop < 16; loop++)

{

//把缩进小后的把这56位分为左28位和右28位,

//对左28位和右28位分别循环左/右移, 得到一组新数据

//加解密 *** 作时只在移位时有差异

move_bits(key_tmp, 0, 27, Table_Move[mode][loop]);

move_bits(key_tmp, 28, 55, Table_Move[mode][loop]);

//密钥第二次缩小换位，得到一组子48位的子密钥

Permutation(key_tmp, sub_key, Table_PC2, 48);

//R0扩展置换

Permutation(p_right, p_right_ext, Table_E, 48);

//将R0扩展置换后得到的48位数据(6字节)与子密钥进行异或

Xor(p_right_ext, sub_key, 6);

//S_BOX置换

for(s_loop = 0; s_loop < 4; s_loop++)

{

uint8 IDATA s_line = 0;

uint8 IDATA s_row = 0;

uint8 IDATA s_bit = s_loop 12;

s_line = S_GetLine(p_right_ext, s_bit);

s_row = S_GetRow(p_right_ext, s_bit);

p_right_s[s_loop] = Table_SBOX[s_loop 2][s_line][s_row];

s_bit += 6;

s_line = S_GetLine(p_right_ext, s_bit);

s_row = S_GetRow(p_right_ext, s_bit);

p_right_s[s_loop] <<= 4;

p_right_s[s_loop] += Table_SBOX[(s_loop 2) + 1][s_line][s_row];

}

//P置换

Permutation(p_right_s, p_right_ext, Table_P, 32);

Xor(p_right_ext, p_left, 4);

memcpy(p_left, p_right, 4);

memcpy(p_right, p_right_ext, 4);

}

memcpy(&p_right_ext[4], p_left, 4);

memcpy(p_right_ext, p_right, 4);

//最后再进行一次逆置换, 得到最终加密结果

Permutation(p_right_ext, p_output, Table_InverseIP, 64);

memcpy(InVet,p_output,8);

}

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