帮忙看一下，越界异常，汗！毛病在哪啊？
下面的这段程序是DES加密算法，但是老是出问题：public class des2
{
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 };
int[] IP={58,50,42,34,26,18,10,2,60,52,44,36,28,20,12,462,54,46,38,30,22,14,6,64,56,48,40,32,24,16,8,
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[] pc_1={57,49,41,33,25,17,9,1,58,50,42,34,26,18,10,2,59,51,43,35,27, 9,11,3,60,52,44,36,
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={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[] movebyte={1,1,2,2,2,2,2,2,1,2,2,2,2,2,2,1};//存放移位位数
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[] 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[][][] s={{{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}}, //s1
{{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}}, //s2
{{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}}, //s3
{{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}}, //s4
{{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}}, //s5
{{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}}, //s6
{{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}}, //s7
{{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, 4,7,4,10,8,13,15,12,9,0,3,5,6,11}}}; //s8
char[] read(String s) //明文密文存入数组
{
char[] a=new char[8];
for(int i=0;i<8;i++)
{
a[i]=s.charAt(i);
}
return a;
}
String jmsf(char[] y,char[] m) //char[] jmsf(char[] y,char[] m)
{
int[] erkey=new int[64];String zf="";
int[] erdata=new int[64];
int[] dataresult=new int[64];
int[] dataip=new int[64];
int[][] ki=new int[16][48];
int[] resultzf=new int[8];
erkey=varyer(y);
erdata=varyer(m);
dataip=varyip(erdata);
ki=varykey(erkey);
dataresult=varyjm(dataip,ki);
//char[] zf=new char[8];
for(int i=0;i<8;i++)
{
System.arraycopy(dataresult, i*8,resultzf, 0 , 8);
int sum=resultzf[0]*128+resultzf[1]*64+resultzf[2]*32+resultzf[3]*16+resultzf[4]*8+resultzf[5]*4+resultzf[6]*2+resultzf[7];
zf+=sum;//System.arraycopy(sum, 0,zf,i , 1);
}
return zf;
}
int[] varyjm(int[] x,int[][] t)
{
int[] datae=new int[48];
int[] f=new int[48];
int[] F=new int[32];
int[] R=new int[32];
int[] L=new int[32];
int[] R1=new int[32];
int[] L1=new int[32];
int[] result=new int[64];
for(int i=0;i<32;i++)
{
L[i]=x[i];
R[i]=x[i+32];
}
L1=R;
R1=varyYH(L,F);
for(int i=0;i<16;i++)
{
L1=R1;
datae=varye(R);
f=varyyh(datae,t[i]);
F=varys(f,s[i]);
R1=varyYH(L1,F);
}
int[] L0=new int[32];
int[] R0=new int[32];
L0=R1;R0=L1;
for(int i=0;i<32;i++)
{
result[i]=L0[i];
result[i+32]=R0[i];
}
int[] theresult=new int[64];
for(int i=0;i<64;i++)
{
theresult[i]=result[IP_1[i]-1];
}
return theresult;
}
int[] varyYH(int[] s,int[] t)
{
int[] x=new int[32];
for(int i=0;i<32;i++)
{
if(s[i]==t[i]) x[i]=0;
else x[i]=1;
}
return x;
}
int[] varys(int[] s,int[][] t)
{
int[] x=new int[8];
int[] y=new int[4];
int[] z=new int[32];
int hang;
int lie;
int dian;
for(int i=0;i<8;i++)
{
System.arraycopy(s, i*6, x, 0, 6);
hang=x[5]+x[0]*2;
lie=x[4]+x[3]*2+x[2]*4+x[1]*8;
dian=t[hang][lie];
y[3]=dian%2; dian=dian/2;
y[2]=dian%2; dian=dian/2;
y[1]=dian%2; dian=dian/2;
y[0]=dian%2;
System.arraycopy(y, 0, z, i*4, 4);
}
int[] m=new int[32];
for(int i=0;i<32;i++)
{
m[i]=z[p[i]-1];
}
return m;
}
int[] varyyh(int[] s,int[] t)
{
int[] x=new int[48];
for(int i=0;i<48;i++)
{
if(s[i]==t[i]) x[i]=0;
else x[i]=1;
}
return x;
}
int[] varye(int[] s)
{
int[] datae=new int[48];
for(int i=0;i<48;i++)
{
datae[i]=s[E[i]-1];
}
return datae;
}
int[][] varykey(int[] s)
{
int[] k=new int[56];
int[] m=new int[56];
for(int i=0;i<56;i++)
{
m[i]=s[pc_1[i]-1];
}
int[] c=new int[28];
int[] d=new int[28];
for(int i=0;i<28;i++)
{
c[i]=m[i];
d[i]=m[i+28];
}
int[] C=new int[28];
int[] D=new int[28];
int[][] K=new int[16][48];
for(int i=0;i<16;i++)
{
if(movebyte[i]==1) //左移一位
{
for(int j=0;j<27;j++)
{
C[j]=c[j+1];
D[j]=d[j+1];
}
C[27]=c[0];
D[27]=d[0];
}
if(movebyte[i]==2) //左移两位
{
for(int j=0;j<26;j++)
{
C[j]=c[j+2];
D[j]=d[j+2];
}
C[26]=c[0];
C[27]=c[1];
D[26]=d[0];
D[27]=d[1];
}
for(int n=0;n<28;n++) //连接高低密钥组成56位
{
k[n]=c[n];
k[n+28]=d[n];
}
for(int j=0;j<48;j++)
{
K[i][j]=k[pc_2[j]-1];
}
}
return K;
}
int[] varyip(int[] s)
{
int[] m=new int[64];
for(int i=1;i<=64;i++)
{
m[i]=s[IP[i]];
}
return m;
}
int[] varyer(char[] s)
{
int[] zcz=new int[64]; //存对应8个字符的64位二进制
for(int i=0;i<8;i++)
{
for(int j=0;j<8;j++)
{
zcz[(i*8)+7-j]=s[i]%2;
s[i]/=2;
}
}
return zcz;
}
public static void main(String[] args)
{
String zj="Asdfrthj";
String zj2="12345678";
des2 Des=new des2();
char[] mw=Des.read(zj);
char[] my=Des.read(zj2);
String shuchu="";//char[] shuchu=new char[8];
shuchu=Des.jmsf(my,mw);
System.out.println(shuchu);
}
}
每次编绎都能通过，运行就会出现下面的异常：
Exception in thread "main"java.lang.ArrayIndexOutOfBoundsException:462
at des2.varyip(des2.java:212)
at des2.jmsf(des2.java:43)
at des2.main(des2.java:238)
[[it] 本帖最后由 lulu820830 于 2008-4-12 18:05 编辑 [/it]]
