des java c_这个des加密，到底是用的哪种类型？
到底是不是ECB模式+Pkcs7？
因為需要在別的語言中實現(js前端)，需要對接后端的加密方式，這是后端的方法
不懂java，在http://tool.chacuo.net/cryptd...，都加不出相同的結果來
看上去應該是和這篇文章的方法類似，但是具體是什么加密呢？
package com.loty.crypto;
/**
* *********************************************
* DES 算法
* 翻譯自C語言版本。
* ***********************************************
*/
public class Des {
private String key = "09876543210987654321098765432109";
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
/**
* 加密
*
* @param byteArray
* @return
*/
public byte[] encode(byte[] byteArray) {
int iLen = byteArray.length;
int iByteLen = ((int) Math.floor(iLen / 8) + 1) * 8;
byte[] bEncoded = new byte[iByteLen];
int i = ENCRYPT(key.getBytes(), byteArray, bEncoded, iLen);
byte[] result = new byte[i];
System.arraycopy(bEncoded, 0, result, 0, i);
return result;
}
/**
* 解密
*
* @param byteArray
* @return
*/
public byte[] decode(byte[] byteArray) {
int iLen = byteArray.length;
byte[] bDecoded = new byte[iLen];
int i = DECRYPT(key.getBytes(), bDecoded, byteArray, iLen);
int n = 0;
while (n < i) {
if (bDecoded[n] == 0) break;
n++;
}
byte[] result = new byte[n];
System.arraycopy(bDecoded, 0, result, 0, n);
return result;
}
public String digestHexStr;
//28
static final int pc_1_cp[] = {
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};
//28
static final int pc_1_dp[] = {
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};
//48
static final int pc_2p[] = {
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};
//16
static final int ls_countp[] = {1, 1, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 1};
//64
static final int iip_tab_p[] = {
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};
//64
static final int _iip_tab_p[] = {
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};
//48
static final int e_r_p[] = {
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};
//32
static final int local_PP[] = {
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};
//[8][4][16]
static final int ccom_SSS_p[][][] = {
{{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, 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}},
{{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}}, /* err on */
{{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}, /* err on */
{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}},
{{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}}};
byte[][] C = new byte[17][28];
byte[][] D = new byte[17][28];
byte[][] K = new byte[17][48];
public Des() {
return;
}
/*iu2b把int轉換成byte
*/
private static byte iu2b(int input) {
byte output1;
output1 = (byte) (input & 0xff);
return output1;
}
/*
b2iu把byte按照不考慮正負號的原則的＂升位＂成int程序，
因為java沒有unsigned運算
*/
private static int b2iu(byte b) {
return b < 0 ? b & 0x7F + 128 : b;
}
/*byteHEX()，用來把一個byte類型的數轉換成十六進制的ASCII表示，
因為java中的byte的toString無法實現這一點，我們又沒有C語言中的
sprintf(outbuf,"%02X",ib)
*/
public static String byteHEX(byte ib) {
char[] Digit = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
char[] ob = new char[2];
ob[0] = Digit[(ib >>> 4) & 0X0F];
ob[1] = Digit[ib & 0X0F];
String s = new String(ob);
return s;
}
/* desMemcpy是一個內部使用的byte數組的塊拷貝函數，
從input的inpos開始把len長度的
字節拷貝到output的outpos位置開始
*/
private void desMemcpy(byte[] output, byte[] input, int outpos, int inpos, int len) {
int i;
for (i = 0; i < len; i++)
output[outpos + i] = input[inpos + i];
}
private void Fexpand0(byte[] in, byte[] out) {
int divide;
int i, j;
byte temp1;
for (i = 0; i < 8; i++) {
divide = 7;
for (j = 0; j < 8; j++) {
temp1 = in[i];
out[8 * i + j] = iu2b((b2iu(temp1) >>> divide) & 1);
divide--;
}
}
}
private void FLS(byte[] bits, byte[] buffer, int count) {
int i, j;
for (i = 0; i < 28; i++) {
buffer[i] = bits[(i + count) % 28];
}
}
private void Fson(byte[] cc, byte[] dd, byte[] kk) {
int i, j;
byte[] buffer = new byte[56];
for (i = 0; i < 28; i++)
buffer[i] = cc[i];
for (i = 28; i < 56; i++)
buffer[i] = dd[i - 28];
for (i = 0; i < 48; i++)
kk[i] = buffer[pc_2p[i] - 1];
}
private void Fsetkeystar(byte[] bits) {
int i, j;
for (i = 0; i < 28; i++)
C[0][i] = bits[pc_1_cp[i] - 1];
for (i = 0; i < 28; i++)
D[0][i] = bits[pc_1_dp[i] - 1];
for (j = 0; j < 16; j++) {
FLS(C[j], C[j + 1], ls_countp[j]);
FLS(D[j], D[j + 1], ls_countp[j]);
Fson(C[j + 1], D[j + 1], K[j + 1]);
}
}
private void Fiip(byte[] text, byte[] ll, byte[] rr) {
int i, j;
byte[] buffer = new byte[64];
byte[] tmp = new byte[64];
Fexpand0(text, buffer);
for (i = 0; i < 32; i++)
ll[i] = buffer[iip_tab_p[i] - 1];
for (i = 0; i < 32; i++)
rr[i] = buffer[iip_tab_p[i + 32] - 1];
}
private void Fs_box(byte[] aa, byte[] bb) {
int i, j, k, m;
int y, z;
byte[] ss = new byte[8];
m = 0;
for (i = 0; i < 8; i++) {
j = 6 * i;
y = b2iu(aa[j]) * 2 + b2iu(aa[j + 5]);
z = b2iu(aa[j + 1]) * 8 + b2iu(aa[j + 2]) * 4 + b2iu(aa[j + 3]) * 2 + b2iu(aa[j + 4]);
ss[i] = iu2b(ccom_SSS_p[i][y][z]);
y = 3;
for (k = 0; k < 4; k++) {
bb[m++] = iu2b((b2iu(ss[i]) >>> y) & 1);
y--;
}
}
}
private void FF(int n, byte[] ll, byte[] rr, byte[] LL, byte[] RR) {
int i, j;
byte[] buffer = new byte[64], tmp = new byte[64];
for (i = 0; i < 48; i++)
buffer[i] = rr[e_r_p[i] - 1];
for (i = 0; i < 48; i++)
buffer[i] = iu2b((b2iu(buffer[i]) + b2iu(K[n][i])) & 1);
Fs_box(buffer, tmp);
for (i = 0; i < 32; i++)
buffer[i] = tmp[local_PP[i] - 1];
for (i = 0; i < 32; i++)
RR[i] = iu2b((b2iu(buffer[i]) + b2iu(ll[i])) & 1);
for (i = 0; i < 32; i++)
LL[i] = rr[i];
}
private void _Fiip(byte[] text, byte[] ll, byte[] rr) {
int i, j;
byte[] tmp = new byte[64];
for (i = 0; i < 32; i++)
tmp[i] = ll[i];
for (i = 32; i < 64; i++)
tmp[i] = rr[i - 32];
for (i = 0; i < 64; i++)
text[i] = tmp[_iip_tab_p[i] - 1];
}
private void Fcompress016(byte[] out, byte[] in) {
int times;
int i, j;
for (i = 0; i < 16; i++) {
times = 3;
in[i] = '0';
for (j = 0; j < 4; j++) {
in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 16 + j]) << times));
times--;
}
}
}
void Fcompress0(byte[] out, byte[] in) {
int times;
int i, j;
for (i = 0; i < 8; i++) {
times = 7;
in[i] = 0;
for (j = 0; j < 8; j++) {
in[i] = iu2b(b2iu(in[i]) + (b2iu(out[i * 8 + j]) << times));
times--;
}
}
}
private void Fencrypt0(byte[] text, byte[] mtext) {
byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
byte[] tmp = new byte[64];
int i, j;
Fiip(text, ll, rr);
for (i = 1; i < 17; i++) {
FF(i, ll, rr, LL, RR);
for (j = 0; j < 32; j++) {
ll[j] = LL[j];
rr[j] = RR[j];
}
}
_Fiip(tmp, rr, ll);
Fcompress0(tmp, mtext);
}
private void FDES(byte[] key, byte[] text, byte[] mtext) {
byte[] tmp = new byte[64];
Fexpand0(key, tmp);
Fsetkeystar(tmp);
Fencrypt0(text, mtext);
}
/*加密*/
public int ENCRYPT(byte[] key, byte[] s, byte[] d, int len) {
int i, j;
byte[] cData = new byte[8];
byte[] cEncryptData = new byte[8];
for (i = 0; i < len; i += 8) {
if ((i + 8) > len) {
desMemcpy(cData, s, 0, i, len - i);
for (j = len - i; j < 8; j++)
cData[j] = 0;
} else
desMemcpy(cData, s, 0, i, 8);
FDES(key, cData, cEncryptData);
desMemcpy(d, cEncryptData, i, 0, 8);
}
return i;
}
private void Fdiscrypt0(byte[] mtext, byte[] text) {
byte[] ll = new byte[64], rr = new byte[64], LL = new byte[64], RR = new byte[64];
byte[] tmp = new byte[64];
int i, j;
Fiip(mtext, ll, rr);
for (i = 16; i > 0; i--) {
FF(i, ll, rr, LL, RR);
for (j = 0; j < 32; j++) {
ll[j] = LL[j];
rr[j] = RR[j];
}
}
_Fiip(tmp, rr, ll);
Fcompress0(tmp, text);
}
/**
* **************************************************************************
* function: DES
* parameter: u_char * key ; key for encrypt
* u_char * mtext ; encipher data
* u_char * text ; plain data
* return: none
* ***************************************************************************
*/
private void _FDES(byte[] key, byte[] mtext, byte[] text) {
byte[] tmp = new byte[64];
Fexpand0(key, tmp);
Fsetkeystar(tmp);
Fdiscrypt0(mtext, text);
}
/*解密*/
public int DECRYPT(byte[] key, byte[] s, byte[] d, int len) {
int i;
byte[] cData = new byte[8];
byte[] cEncryptData = new byte[8];
for (i = 0; i < len; i += 8) {
desMemcpy(cEncryptData, d, 0, i, 8);
_FDES(key, cEncryptData, cData);
desMemcpy(s, cData, i, 0, 8);
}
return i;
}
public static byte[] hexStr2ByteArr(String strIn) {
byte[] arrB = strIn.getBytes();
int iLen = arrB.length;
//兩個字符表示一個字節，所以字節數組長度是字符串長度除以2
byte[] arrOut = new byte[iLen / 2];
for (int i = 0; i < iLen; i = i + 2) {
String strTmp = new String(arrB, i, 2);
arrOut[i / 2] = (byte) Integer.parseInt(strTmp, 16);
}
return arrOut;
}
public String byteArr2HexStr(byte[] arrB, int iLen) throws Exception {
// 每個byte用兩個字符才能表示，所以字符串的長度是數組長度的兩倍
StringBuffer sb = new StringBuffer(iLen * 2);
for (int i = 0; i < iLen; i++) {
int intTmp = arrB[i];
while (intTmp < 0) {
intTmp = intTmp + 256;
}
if (intTmp < 16) {
sb.append("0");
}
sb.append(Integer.toString(intTmp, 16));
}
String result = sb.toString();
return result;
}
}
總結
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