Unix标准加密方法（2）
/* nibble 4 */
0x02000000, 0x00004000, 0x00000100, 0x02004108,
0x02004008, 0x02000100, 0x00004108, 0x02004000,
0x00004000, 0x00000008, 0x02000008, 0x00004100,
0x02000108, 0x02004008, 0x02004100, 0x00000000,
0x00004100, 0x02000000, 0x00004008, 0x00000108,
0x02000100, 0x00004108, 0x00000000, 0x02000008,
0x00000008, 0x02000108, 0x02004108, 0x00004008,
0x02004000, 0x00000100, 0x00000108, 0x02004100,
0x02004100, 0x02000108, 0x00004008, 0x02004000,
0x00004000, 0x00000008, 0x02000008, 0x02000100,
0x02000000, 0x00004100, 0x02004108, 0x00000000,
0x00004108, 0x02000000, 0x00000100, 0x00004008,
0x02000108, 0x00000100, 0x00000000, 0x02004108,
0x02004008, 0x02004100, 0x00000108, 0x00004000,
0x00004100, 0x02004008, 0x02000100, 0x00000108,
0x00000008, 0x00004108, 0x02004000, 0x02000008,
},
{
/* nibble 5 */
0x20000010, 0x00080010, 0x00000000, 0x20080800,
0x00080010, 0x00000800, 0x20000810, 0x00080000,
0x00000810, 0x20080810, 0x00080800, 0x20000000,
0x20000800, 0x20000010, 0x20080000, 0x00080810,
0x00080000, 0x20000810, 0x20080010, 0x00000000,
0x00000800, 0x00000010, 0x20080800, 0x20080010,
0x20080810, 0x20080000, 0x20000000, 0x00000810,
0x00000010, 0x00080800, 0x00080810, 0x20000800,
0x00000810, 0x20000000, 0x20000800, 0x00080810,
0x20080800, 0x00080010, 0x00000000, 0x20000800,
0x20000000, 0x00000800, 0x20080010, 0x00080000,
0x00080010, 0x20080810, 0x00080800, 0x00000010,
0x20080810, 0x00080800, 0x00080000, 0x20000810,
0x20000010, 0x20080000, 0x00080810, 0x00000000,
0x00000800, 0x20000010, 0x20000810, 0x20080800,
0x20080000, 0x00000810, 0x00000010, 0x20080010,
},
{
/* nibble 6 */
0x00001000, 0x00000080, 0x00400080, 0x00400001,
0x00401081, 0x00001001, 0x00001080, 0x00000000,
0x00400000, 0x00400081, 0x00000081, 0x00401000,
0x00000001, 0x00401080, 0x00401000, 0x00000081,
0x00400081, 0x00001000, 0x00001001, 0x00401081,
0x00000000, 0x00400080, 0x00400001, 0x00001080,
0x00401001, 0x00001081, 0x00401080, 0x00000001,
0x00001081, 0x00401001, 0x00000080, 0x00400000,
0x00001081, 0x00401000, 0x00401001, 0x00000081,
0x00001000, 0x00000080, 0x00400000, 0x00401001,
0x00400081, 0x00001081, 0x00001080, 0x00000000,
0x00000080, 0x00400001, 0x00000001, 0x00400080,
0x00000000, 0x00400081, 0x00400080, 0x00001080,
0x00000081, 0x00001000, 0x00401081, 0x00400000,
0x00401080, 0x00000001, 0x00001001, 0x00401081,
0x00400001, 0x00401080, 0x00401000, 0x00001001,
},
{
/* nibble 7 */
0x08200020, 0x08208000, 0x00008020, 0x00000000,
0x08008000, 0x00200020, 0x08200000, 0x08208020,
0x00000020, 0x08000000, 0x00208000, 0x00008020,
0x00208020, 0x08008020, 0x08000020, 0x08200000,
0x00008000, 0x00208020, 0x00200020, 0x08008000,
0x08208020, 0x08000020, 0x00000000, 0x00208000,
0x08000000, 0x00200000, 0x08008020, 0x08200020,
0x00200000, 0x00008000, 0x08208000, 0x00000020,
0x00200000, 0x00008000, 0x08000020, 0x08208020,
0x00008020, 0x08000000, 0x00000000, 0x00208000,
0x08200020, 0x08008020, 0x08008000, 0x00200020,
0x08208000, 0x00000020, 0x00200020, 0x08008000,
0x08208020, 0x00200000, 0x08200000, 0x08000020,
0x00208000, 0x00008020, 0x08008020, 0x08200000,
0x00000020, 0x08208000, 0x00208020, 0x00000000,
0x08000000, 0x08200020, 0x00008000, 0x00208020
}
};
private static final int cov_2char[] =
{
0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
};
private static final int byteToUnsigned(byte b)
{
int value = (int)b;
return(value >= 0 ? value : value + 256);
}
private static int fourBytesToInt(byte b[], int offset)
{
int value;
value = byteToUnsigned(b[offset++]);
value |= (byteToUnsigned(b[offset++]) << 8);
value |= (byteToUnsigned(b[offset++]) << 16);
value |= (byteToUnsigned(b[offset++]) << 24);
return(value);
}
private static final void intToFourBytes(int iValue, byte b[], int
offset)
{
b[offset++] = (byte)((iValue) & 0xff);
b[offset++] = (byte)((iValue >>> 8 ) & 0xff);
b[offset++] = (byte)((iValue >>> 16) & 0xff);
b[offset++] = (byte)((iValue >>> 24) & 0xff);
}
private static final void PERM_OP(int a, int b, int n, int m, int
results[])
{
int t;
t = ((a >>> n) ^ b) & m;
a ^= t << n;
b ^= t;
results[0] = a;
results[1] = b;
}
private static final int HPERM_OP(int a, int n, int m)
{
int t;
t = ((a << (16 - n)) ^ a) & m;
a = a ^ t ^ (t >>> (16 - n));
return(a);
}
private static int [] des_set_key(byte key[])
{
int schedule[] = new int[ITERATIONS * 2];
int c = fourBytesToInt(key, 0);
int d = fourBytesToInt(key, 4);
int results[] = new int[2];
PERM_OP(d, c, 4, 0x0f0f0f0f, results);
d = results[0]; c = results[1];
c = HPERM_OP(c, -2, 0xcccc0000);
d = HPERM_OP(d, -2, 0xcccc0000);
PERM_OP(d, c, 1, 0x55555555, results);
d = results[0]; c = results[1];
PERM_OP(c, d, 8, 0x00ff00ff, results);
c = results[0]; d = results[1];
PERM_OP(d, c, 1, 0x55555555, results);
d = results[0]; c = results[1];
d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00) |
((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
c &= 0x0fffffff;
int s, t;
int j = 0;
for(int i = 0; i < ITERATIONS; i ++)
{
if(shifts2[i])
{
c = (c >>> 2) | (c << 26);
d = (d >>> 2) | (d << 26);
}
else
{
c = (c >>> 1) | (c << 27);
d = (d >>> 1) | (d << 27);
}
c &= 0x0fffffff;
d &= 0x0fffffff;
s = skb[0][ (c ) & 0x3f ]|
skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]|
skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]|
skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06) |
((c >>> 22) & 0x38)];
t = skb[4][ (d ) & 0x3f ]|
skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]|
skb[6][ (d >>>15) & 0x3f ]|
skb[7][((d >>>21) & 0x0f) | ((d >>> 22) & 0x30)];
schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
s = ((s >>> 16) | (t & 0xffff0000));
s = (s << 4) | (s >>> 28);
schedule[j++] = s & 0xffffffff;
}
return(schedule);
}
private static final int D_ENCRYPT
(
int L, int R, int S, int E0, int E1, int s[]
)
{
int t, u, v;
v = R ^ (R >>> 16);
u = v & E0;
v = v & E1;
u = (u ^ (u << 16)) ^ R ^ s[S];
t = (v ^ (v << 16)) ^ R ^ s[S + 1];
t = (t >>> 4) | (t << 28);
L ^= SPtrans[1][(t ) & 0x3f] |
SPtrans[3][(t >>> 8) & 0x3f] |
SPtrans[5][(t >>> 16) & 0x3f] |
SPtrans[7][(t >>> 24) & 0x3f] |
SPtrans[0][(u ) & 0x3f] |
SPtrans[2][(u >>> 8) & 0x3f] |
SPtrans[4][(u >>> 16) & 0x3f] |
SPtrans[6][(u >>> 24) & 0x3f];
return(L);
}
private static final int [] body(int schedule[], int Eswap0, int Eswap1)
{
int left = 0;
int right = 0;
int t = 0;
for(int j = 0; j < 25; j ++)
{
for(int i = 0; i < ITERATIONS * 2; i += 4)
{
left = D_ENCRYPT(left, right, i, Eswap0, Eswap1,
schedule);
right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1,
schedule);
}
t = left;
left = right;
right = t;
}
t = right;
right = (left >>> 1) | (left << 31);
left = (t >>> 1) | (t << 31);
left &= 0xffffffff;
right &= 0xffffffff;
int results[] = new int[2];
PERM_OP(right, left, 1, 0x55555555, results);
right = results[0]; left = results[1];
PERM_OP(left, right, 8, 0x00ff00ff, results);
left = results[0]; right = results[1];
PERM_OP(right, left, 2, 0x33333333, results);
right = results[0]; left = results[1];
PERM_OP(left, right, 16, 0x0000ffff, results);
left = results[0]; right = results[1];
PERM_OP(right, left, 4, 0x0f0f0f0f, results);
right = results[0]; left = results[1];
int out[] = new int[2];
out[0] = left; out[1] = right;
return(out);
}
public synchronized static final String crypt(String salt, String original)
{
while(salt.length() < 2) salt += "A";
StringBuffer buffer = new StringBuffer(" ");
char charZero = salt.charAt(0);
char charOne = salt.charAt(1);
buffer.setCharAt(0, charZero);
buffer.setCharAt(1, charOne);
int Eswap0 = con_salt[(int)charZero];
int Eswap1 = con_salt[(int)charOne] << 4;
byte key[] = new byte[8];
for(int i = 0; i < key.length; i ++) key[i] = (byte)0;
for(int i = 0; i < key.length && i < original.length(); i ++)
{
int iChar = (int)original.charAt(i);
key[i] = (byte)(iChar << 1);
}
int schedule[] = des_set_key(key);
int out[] = body(schedule, Eswap0, Eswap1);
byte b[] = new byte[9];
intToFourBytes(out[0], b, 0);
intToFourBytes(out[1], b, 4);
b[8] = 0;
for(int i = 2, y = 0, u = 0x80; i < 13; i ++)
{
for(int j = 0, c = 0; j < 6; j ++)
{
c <<= 1;
if(((int)b[y] & u) != 0) c |= 1;
u >>>= 1;
if(u == 0)
{
y++;
u = 0x80;
}
buffer.setCharAt(i, (char)cov_2char[c]);
}
}
return(buffer.toString());
}
}