DES加密算法代码文档格式.docx
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DES加密算法代码文档格式.docx
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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};
//PC_2置换坐标表
intPC_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};
//迭代左移位数数组
intlsi[16]={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};
//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};
intKeyOutBox[48]={0};
//输出的子密钥数组
intlsinumber=0;
//用于记录是第i次加密,lsinumber等于i
//sherry第二个函数所用
//f操作中将R0扩展为48位的置换坐标表
intfExpand48[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,
28,29,30,31,32,31};
//P变换置换坐标表
intfPChange[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};
//S盒置换坐标表
intsBox[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},
{0,14,4,11,10,4,13,1,5,8,12,6,9,3,2,15},
{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},
{10,6,9,0,12,11,7,8,15,9,12,5,6,3,0,14},
{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}
}
};
/*---------------------生成R0L0-----------------------*
**将输入的分别为8个的明文和密钥转化为64bit的明文和密钥,**
**分别放入Data64[]和Key64[];
**
**将生成的64bit的明文通过IP置换得到L0[]和R0[]**
**-----------------------------------------------------*/
voidR0andL0(chartempData[8])
{
inti,j,temp,y;
intk=0;
inttempBox[64];
intmtemp=0;
for(i=0;
i<
8;
i++)
{
for(j=7;
j>
=0;
j--)
{
temp=tempData[i]&
(1<
<
j);
if(0==temp)
{
tempBox[k]=0;
k++;
}
else
tempBox[k]=1;
}
}
//当flagDorK等于1时,为明文转化,生成L0和R0
if(flagDorK==1)
printf("
转化为64bit明文\n"
);
for(y=0;
y<
64;
y++)
Data64[y]=tempBox[y];
tempBox[y]=0;
printf("
%d"
Data64[y]);
if(y==7||y==15||y==23||y==39||y==47||y==55||y==63)
{
printf("
"
if(y==31)
\n"
DataTemp[y]=Data64[DataIP[y]-1];
if(y<
32)
L0[y]=DataTemp[y];
else
R0[y-32]=DataTemp[y];
\n明文Data过IP置换后得到:
printf("
L0:
i<
32;
i++)
L0[i]);
if(i==7||i==15||i==23||i==31)
\nR0:
R0[i]);
\n\n"
//当flagDorK等于0时,为密钥转化,生成密钥Key64
if(flagDorK==0)
转化为64bit的密钥\n"
Key64[y]=tempBox[y];
Key64[y]);
}
/*---------------输入函数-------------**
**------------------------------------*/
voidInput(){
inti;
请输入明文:
scanf("
%c"
&
preData[i]);
}
flagDorK=1;
R0andL0(preData);
getchar();
请输入密钥:
scanf("
preKey[i]);
flagDorK=0;
R0andL0(preKey);
//IP逆置换
intDES_IP_1_Transform(intdata[64]){
intcnt;
inttemp[64];
for(cnt=0;
cnt<
64;
cnt++){
temp[cnt]=data[IP_1_Table[cnt]];
memcpy(data,temp,64);
data[cnt]);
return0;
}
//二进制转换成字节
intBitToByte(intbit[8],int*ch){
cnt<
8;
*ch|=*(bit+cnt)<
cnt;
cnt++){
ch[cnt]);
/*------------------生成子密钥函数------------------**
**传进来的64bit密钥通过PC_1置换坐标表变成56bit子密钥**
**此函数被调用16次即得到16个子密钥**
**--------------------------------------------------*/
voidsubKey(intK[64])
intK0[56]={0};
intKeyOut[56]={0};
///*检测所用*/intK0[56]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27};
inttempC[28]={0};
inttempD[28]={0};
inttemp[56]={0};
inti=0,j=0,lsisum=0;
//lsisum为算出要移多少位
=lsinumber-1;
lsisum+=lsi[i];
//得到第一个56位
for(j=0;
j<
56;
j++)
K0[j]=K[PC_1[j]-1];
//移位操作lsisum为移多少位,不论Ki中i为多少都可以用这个来做
//tempC相当于教程中C0移位后的。
tempD相当于教程中D0移位后的。
28-lsisum;
tempC[i]=K0[i+lsisum];
for(i=28-lsisum;
28;
tempC[i]=K0[i+lsisum-28];
for(i=28;
tempD[i-28]=K0[i+lsisum];
tempD[i-28]=K0[i+lsisum-28];
//temp为移位后的56位整体
temp[i]=tempC[i];
temp[i]=tempD[i-28];
//KeyOut数组是得到的Klsinumber,第lsinumber次加密
//丢弃8位
48;
KeyOut[j]=temp[PC_2[j]-1];
//检测
第%d个子密钥\n"
lsinumber);
KeyOut[i]);
if(i==7||i==15||i==23||i==31||i==39)
{printf("
KeyOutBox[i]=KeyOut[i];
/*--------------------f变换函数---------------------**
**先将传进来的32bit的R0扩充至48bit**
**将48bit与子密钥作异或运算**
**通过s盒和p变换后得到的ftemp与L0进行异或运算**
**将R0赋值给L0,ftemp赋值给R0,得到新的L0和R0**
voidfFuction(intflag)
//intKeyOut[48]={1,0,3,0,5,0,0,8,9,10,0,12,0,0,15,0,17,18,19,0,21,22,0,0,25,26,0,28,29,0,31,32,0,34,35,36,0,0,39,0,41,42,43,0,0,46,0,48};
intRtemp48[48]={0};
intRKxor[48]={0};
intsBoxBIT[8][4]={0};
intsBox32[32]={0};
intftemp[32]={0};
inti=0,j=0,k=0;
introw=0,column=0,sBoxNum=0,temp=0;
intplainBits[64];
intcipherBlock[8]={0};
//扩展为48位
Rtemp48[i]=R0[fExpand48[i]-1];
RKxor[i]=Rtemp48[i]^KeyOutBox[i];
k=0;
//清除k的值
row=RKxor[(1+(i*6))-1]*2+RKxor[(6+(i*6))-1];
column=RKxor[(2+(i*6))-1]*8+RKxor[(3+(i*6))-1]*4+RKxor[(4+(i*6))-1]*2+RKxor[(5+(i*6))-1];
sBoxNum=sBox[i][row][column];
for(j=3;
temp=sBoxNum&
sBoxBIT[i][k]=0;
sBoxBIT[i][k]=1;
k=0;
for(j=0;
4;
sBox32[k]=sBoxBIT[i][j];
k++;
//P变换
ftemp[i]=sBox32[fPChange[i]-1];
//与L0进行异或运算
ftemp[i]=L0[i]^ftemp[i];
if(flag!
=15){
for(i=1;
L0[i]=R0[i-1];
R0[i]=ftemp[i];
}else{
for(i=0;
i<
32;
i++){
plainBits[i]=R0[i];
plainBits[32+i]=L0[i];
//逆初始置换(IP^1置换)
DES_IP_1_Transform(plainBits);
voidmain()
inti=0;
Input();
16;
//每进来此函数一次,lsinumber+1,相当于Ki=Klsinumber
lsinumber++;
subKey(Key64);
fFuction(i);
运行结果:
由64位明文12345678,经过64位密钥12345678加密后,最终得到16进制的64位密文,该密文为96D0028878D58C89
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