package com.dxgw.util;
import java.util.Arrays;
public class SMS4 {
public static final int ENCRYPT = 1;
public static final int DECRYPT = 0;
public static final int ROUND = 32;
private static final int BLOCK = 16;
public static byte[] SYEK = {0x01, 0x23, 0x45, 0x67, (byte) 0x89, (byte) 0xab, (byte) 0xcd, (byte) 0xef, (byte) 0xfe, (byte) 0xdc, (byte) 0xba, (byte) 0x98, 0x76, 0x54, 0x32, 0x10};
private static byte[] Sbox = {(byte) 0xd6, (byte) 0x90, (byte) 0xe9, (byte) 0xfe, (byte) 0xcc, (byte) 0xe1, 0x3d, (byte) 0xb7, 0x16, (byte) 0xb6, 0x14, (byte) 0xc2, 0x28, (byte) 0xfb, 0x2c, 0x05, 0x2b, 0x67, (byte) 0x9a, 0x76, 0x2a, (byte) 0xbe, 0x04, (byte) 0xc3, (byte) 0xaa, 0x44, 0x13, 0x26, 0x49, (byte) 0x86, 0x06, (byte) 0x99, (byte) 0x9c, 0x42, 0x50, (byte) 0xf4, (byte) 0x91, (byte) 0xef, (byte) 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, (byte) 0xed, (byte) 0xcf, (byte) 0xac, 0x62, (byte) 0xe4, (byte) 0xb3, 0x1c, (byte) 0xa9, (byte) 0xc9, 0x08, (byte) 0xe8, (byte) 0x95, (byte) 0x80, (byte) 0xdf, (byte) 0x94, (byte) 0xfa, 0x75, (byte) 0x8f, 0x3f, (byte) 0xa6, 0x47, 0x07, (byte) 0xa7, (byte) 0xfc, (byte) 0xf3, 0x73, 0x17, (byte) 0xba, (byte) 0x83, 0x59, 0x3c, 0x19, (byte) 0xe6, (byte) 0x85, 0x4f, (byte) 0xa8, 0x68, 0x6b, (byte) 0x81, (byte) 0xb2, 0x71, 0x64, (byte) 0xda, (byte) 0x8b, (byte) 0xf8, (byte) 0xeb, 0x0f, 0x4b, 0x70, 0x56, (byte) 0x9d, 0x35, 0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, (byte) 0xd1, (byte) 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, (byte) 0x87, (byte) 0xd4, 0x00, 0x46, 0x57, (byte) 0x9f, (byte) 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, (byte) 0xe7, (byte) 0xa0, (byte) 0xc4, (byte) 0xc8, (byte) 0x9e, (byte) 0xea, (byte) 0xbf, (byte) 0x8a, (byte) 0xd2, 0x40, (byte) 0xc7, 0x38, (byte) 0xb5, (byte) 0xa3, (byte) 0xf7, (byte) 0xf2, (byte) 0xce, (byte) 0xf9, 0x61, 0x15, (byte) 0xa1, (byte) 0xe0, (byte) 0xae, 0x5d, (byte) 0xa4, (byte) 0x9b, 0x34, 0x1a, 0x55, (byte) 0xad, (byte) 0x93, 0x32, 0x30, (byte) 0xf5, (byte) 0x8c, (byte) 0xb1, (byte) 0xe3, 0x1d, (byte) 0xf6, (byte) 0xe2, 0x2e, (byte) 0x82, 0x66, (byte) 0xca, 0x60, (byte) 0xc0, 0x29, 0x23, (byte) 0xab, 0x0d, 0x53, 0x4e, 0x6f, (byte) 0xd5, (byte) 0xdb, 0x37, 0x45, (byte) 0xde, (byte) 0xfd, (byte) 0x8e, 0x2f, 0x03, (byte) 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51, (byte) 0x8d, 0x1b, (byte) 0xaf, (byte) 0x92, (byte) 0xbb, (byte) 0xdd, (byte) 0xbc, 0x7f, 0x11, (byte) 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, (byte) 0xd8, 0x0a, (byte) 0xc1, 0x31, (byte) 0x88, (byte) 0xa5, (byte) 0xcd, 0x7b, (byte) 0xbd, 0x2d, 0x74, (byte) 0xd0, 0x12, (byte) 0xb8, (byte) 0xe5, (byte) 0xb4, (byte) 0xb0, (byte) 0x89, 0x69, (byte) 0x97, 0x4a, 0x0c, (byte) 0x96, 0x77, 0x7e, 0x65, (byte) 0xb9, (byte) 0xf1, 0x09, (byte) 0xc5, 0x6e, (byte) 0xc6, (byte) 0x84, 0x18, (byte) 0xf0, 0x7d, (byte) 0xec, 0x3a, (byte) 0xdc, 0x4d, 0x20, 0x79, (byte) 0xee, 0x5f, 0x3e, (byte) 0xd7, (byte) 0xcb, 0x39, 0x48};
private static int[] CK = {0x00070e15, 0x1c232a31, 0x383f464d, 0x545b6269, 0x70777e85, 0x8c939aa1, 0xa8afb6bd, 0xc4cbd2d9, 0xe0e7eef5, 0xfc030a11, 0x181f262d, 0x343b4249, 0x50575e65, 0x6c737a81, 0x888f969d, 0xa4abb2b9, 0xc0c7ced5, 0xdce3eaf1, 0xf8ff060d, 0x141b2229, 0x30373e45, 0x4c535a61, 0x686f767d, 0x848b9299, 0xa0a7aeb5, 0xbcc3cad1, 0xd8dfe6ed, 0xf4fb0209, 0x10171e25, 0x2c333a41, 0x484f565d, 0x646b7279};
private static int Rotl(int x, int y) {
return x << y | x >>> (32 - y);
}
private static int ByteSub(int A) {
return (Sbox[A >>> 24 & 0xFF] & 0xFF) << 24 | (Sbox[A >>> 16 & 0xFF] & 0xFF) << 16 | (Sbox[A >>> 8 & 0xFF] & 0xFF) << 8 | (Sbox[A & 0xFF] & 0xFF);
}
private static int L1(int B) {
return B ^ Rotl(B, 2) ^ Rotl(B, 10) ^ Rotl(B, 18) ^ Rotl(B, 24);
}
private static int L2(int B) {
return B ^ Rotl(B, 13) ^ Rotl(B, 23);
}
private static void SMS4Crypt(byte[] Input, byte[] Output, int[] rk) {
int r, mid, x0, x1, x2, x3;
int[] x = new int[4];
int[] tmp = new int[4];
for (int i = 0; i < 4; i++) {
tmp[0] = Input[0 + 4 * i] & 0xff;
tmp[1] = Input[1 + 4 * i] & 0xff;
tmp[2] = Input[2 + 4 * i] & 0xff;
tmp[3] = Input[3 + 4 * i] & 0xff;
x[i] = tmp[0] << 24 | tmp[1] << 16 | tmp[2] << 8 | tmp[3];
}
for (r = 0; r < 32; r += 4) {
mid = x[1] ^ x[2] ^ x[3] ^ rk[r + 0];
mid = ByteSub(mid);
x[0] = x[0] ^ L1(mid);
mid = x[2] ^ x[3] ^ x[0] ^ rk[r + 1];
mid = ByteSub(mid);
x[1] = x[1] ^ L1(mid);
mid = x[3] ^ x[0] ^ x[1] ^ rk[r + 2];
mid = ByteSub(mid);
x[2] = x[2] ^ L1(mid);
mid = x[0] ^ x[1] ^ x[2] ^ rk[r + 3];
mid = ByteSub(mid);
x[3] = x[3] ^ L1(mid);
}
for (int j = 0; j < 16; j += 4) {
Output[j] = (byte) (x[3 - j / 4] >>> 24 & 0xFF);
Output[j + 1] = (byte) (x[3 - j / 4] >>> 16 & 0xFF);
Output[j + 2] = (byte) (x[3 - j / 4] >>> 8 & 0xFF);
Output[j + 3] = (byte) (x[3 - j / 4] & 0xFF);
}
}
private static void SMS4KeyExt(byte[] Key, int[] rk, int CryptFlag) {
int r, mid;
int[] x = new int[4];
int[] tmp = new int[4];
for (int i = 0; i < 4; i++) {
tmp[0] = Key[0 + 4 * i] & 0xFF;
tmp[1] = Key[1 + 4 * i] & 0xff;
tmp[2] = Key[2 + 4 * i] & 0xff;
tmp[3] = Key[3 + 4 * i] & 0xff;
x[i] = tmp[0] << 24 | tmp[1] << 16 | tmp[2] << 8 | tmp[3];
}
x[0] ^= 0xa3b1bac6;
x[1] ^= 0x56aa3350;
x[2] ^= 0x677d9197;
x[3] ^= 0xb27022dc;
for (r = 0; r < 32; r += 4) {
mid = x[1] ^ x[2] ^ x[3] ^ CK[r + 0];
mid = ByteSub(mid);
rk[r + 0] = x[0] ^= L2(mid);
mid = x[2] ^ x[3] ^ x[0] ^ CK[r + 1];
mid = ByteSub(mid);
rk[r + 1] = x[1] ^= L2(mid);
mid = x[3] ^ x[0] ^ x[1] ^ CK[r + 2];
mid = ByteSub(mid);
rk[r + 2] = x[2] ^= L2(mid);
mid = x[0] ^ x[1] ^ x[2] ^ CK[r + 3];
mid = ByteSub(mid);
rk[r + 3] = x[3] ^= L2(mid);
}
if (CryptFlag == DECRYPT) {
for (r = 0; r < 16; r++) {
mid = rk[r];
rk[r] = rk[31 - r];
rk[31 - r] = mid;
}
}
}
public static int sms4(byte[] in, int inLen, byte[] key, byte[] out, int CryptFlag) {
int point = 0;
int[] round_key = new int[ROUND];
SMS4KeyExt(key, round_key, CryptFlag);
byte[] input = new byte[16];
byte[] output = new byte[16];
while (inLen >= BLOCK) {
input = Arrays.copyOfRange(in, point, point + 16);
SMS4Crypt(input, output, round_key);
System.arraycopy(output, 0, out, point, BLOCK);
inLen -= BLOCK;
point += BLOCK;
}
return 0;
}
public static byte[] encryptStr(String inStr) {
if (inStr == null || inStr.equals("")) return null;
return encryptBytes(inStr.getBytes());
}
public static String decryptStr(String hexStr) {
byte[] in = SMS4.hexStringToByte(hexStr);
byte[] out = decryptBytes(in);
String result = new String(out).trim();
return result;
}
public static byte[] encryptBytes(byte[] inBytes) {
if (inBytes == null || inBytes.length == 0) return null;
int len = inBytes.length;
len += 16 - (len % 16);
byte[] out = new byte[len];
sms4(inBytes, len, SMS4.SYEK, out, SMS4.ENCRYPT);
return out;
}
public static byte[] decryptBytes(byte[] in) {
byte[] out = new byte[in.length];
SMS4.sms4(in, in.length, SMS4.SYEK, out, SMS4.DECRYPT);
return out;
}
public static String str2HexStr(String str) {
char[] chars = "0123456789ABCDEF".toCharArray();
StringBuilder sb = new StringBuilder("");
byte[] bs = str.getBytes();
int bit;
for (int i = 0; i < bs.length; i++) {
bit = (bs[i] & 0x0f0) >> 4;
sb.append(chars[bit]);
bit = bs[i] & 0x0f;
sb.append(chars[bit]);
}
return sb.toString();
}
public static byte[] hexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] achar = hex.toCharArray();
for (int i = 0; i < len; i++) {
int pos = i * 2;
result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
}
return result;
}
private static int toByte(char c) {
byte b = (byte) "0123456789ABCDEF".indexOf(c);
return b;
}
public static final String bytesToHexString(byte[] bArray) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i < bArray.length; i++) {
sTemp = Integer.toHexString(0xFF & bArray[i]);
if (sTemp.length() < 2) sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
public static String hexStr2Str(String hexStr) {
String str = "0123456789ABCDEF";
char[] hexs = hexStr.toCharArray();
byte[] bytes = new byte[hexStr.length() / 2];
int n;
for (int i = 0; i < bytes.length; i++) {
n = str.indexOf(hexs[2 * i]) * 16;
n += str.indexOf(hexs[2 * i + 1]);
bytes[i] = (byte) (n & 0xff);
}
return new String(bytes);
}
}
