sms4算法Java实现
方祺
最近开发中用到sms4算法，参照黑-月 的c的代码实现了Java的代码
/**
*
*/
package com.secular.sms4;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* @author shengjunzhao
*
*/
public class SMS4 {
private final static int ROUND = 32;
private static short sbox[] = {
0xd6, 0x90, 0xe9, 0xfe, 0xcc, 0xe1, 0x3d, 0xb7, 0x16, 0xb6, 0x14, 0xc2, 0x28, 0xfb, 0x2c, 0x05,
0x2b, 0x67, 0x9a, 0x76, 0x2a, 0xbe, 0x04, 0xc3, 0xaa, 0x44, 0x13, 0x26, 0x49, 0x86, 0x06, 0x99,
0x9c, 0x42, 0x50, 0xf4, 0x91, 0xef, 0x98, 0x7a, 0x33, 0x54, 0x0b, 0x43, 0xed, 0xcf, 0xac, 0x62,
0xe4, 0xb3, 0x1c, 0xa9, 0xc9, 0x08, 0xe8, 0x95, 0x80, 0xdf, 0x94, 0xfa, 0x75, 0x8f, 0x3f, 0xa6,
0x47, 0x07, 0xa7, 0xfc, 0xf3, 0x73, 0x17, 0xba, 0x83, 0x59, 0x3c, 0x19, 0xe6, 0x85, 0x4f, 0xa8,
0x68, 0x6b, 0x81, 0xb2, 0x71, 0x64, 0xda, 0x8b, 0xf8, 0xeb, 0x0f, 0x4b, 0x70, 0x56, 0x9d, 0x35,
0x1e, 0x24, 0x0e, 0x5e, 0x63, 0x58, 0xd1, 0xa2, 0x25, 0x22, 0x7c, 0x3b, 0x01, 0x21, 0x78, 0x87,
0xd4, 0x00, 0x46, 0x57, 0x9f, 0xd3, 0x27, 0x52, 0x4c, 0x36, 0x02, 0xe7, 0xa0, 0xc4, 0xc8, 0x9e,
0xea, 0xbf, 0x8a, 0xd2, 0x40, 0xc7, 0x38, 0xb5, 0xa3, 0xf7, 0xf2, 0xce, 0xf9, 0x61, 0x15, 0xa1,
0xe0, 0xae, 0x5d, 0xa4, 0x9b, 0x34, 0x1a, 0x55, 0xad, 0x93, 0x32, 0x30, 0xf5, 0x8c, 0xb1, 0xe3,
0x1d, 0xf6, 0xe2, 0x2e, 0x82, 0x66, 0xca, 0x60, 0xc0, 0x29, 0x23, 0xab, 0x0d, 0x53, 0x4e, 0x6f,
0xd5, 0xdb, 0x37, 0x45, 0xde, 0xfd, 0x8e, 0x2f, 0x03, 0xff, 0x6a, 0x72, 0x6d, 0x6c, 0x5b, 0x51,
0x8d, 0x1b, 0xaf, 0x92, 0xbb, 0xdd, 0xbc, 0x7f, 0x11, 0xd9, 0x5c, 0x41, 0x1f, 0x10, 0x5a, 0xd8,
0x0a, 0xc1, 0x31, 0x88, 0xa5, 0xcd, 0x7b, 0xbd, 0x2d, 0x74, 0xd0, 0x12, 0xb8, 0xe5, 0xb4, 0xb0,
0x89, 0x69, 0x97, 0x4a, 0x0c, 0x96, 0x77, 0x7e, 0x65, 0xb9, 0xf1, 0x09, 0xc5, 0x6e, 0xc6, 0x84,
0x18, 0xf0, 0x7d, 0xec, 0x3a, 0xdc, 0x4d, 0x20, 0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
};
private static int fk[] = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };
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
};
public static int rotateLeft(int x, int n) {
return ((x << n) | x >>> (32 - n));
}
private static int ltrans(int b) {
return b ^ (rotateLeft(b, 2)) ^ (rotateLeft(b, 10)) ^ (rotateLeft(b, 18)) ^ (rotateLeft(b, 24));
}
private static int keyLtrans(int b) {
return (b ^ rotateLeft(b, 13) ^ rotateLeft(b, 23));
}
private static int substitute(int x) {
return (sbox[(x >>> 24) & 0xff] << 24)
^ (sbox[(x >>> 16) & 0xff] << 16)
^ (sbox[(x >>> 8) & 0xff] << 8)
^ (sbox[(x) & 0xff]);
}
private static int ttrans(int x) {
return ltrans(substitute(x));
}
private static int keyTtrans(int x) {
return keyLtrans(substitute(x));
}
/**
* 计算轮密钥rk
* @param input
* @param rk
*/
private static void roundFun(int[] input, int rk) {
int tmp = input[0];
input[0] = input[1];
input[1] = input[2];
input[2] = input[3];
input[3] = tmp ^ ttrans(input[0] ^ input[1] ^ input[2] ^ rk);
}
public static void reverse(int[] input) {
int tmp;
tmp = input[0]; input[0] = input[3];input[3] = tmp;
tmp = input[1]; input[1] = input[2];input[2] = tmp;
}
public static int[] calcRk(int[] mainKey) {
int rk[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
int[] key=new int[4];
key[0] = mainKey[0];
key[1] = mainKey[1];
key[2] = mainKey[2];
key[3] = mainKey[3];
key[0] ^= fk[0];
key[1] ^= fk[1];
key[2] ^= fk[2];
key[3] ^= fk[3];
for (int i = 0; i < ROUND; i++) {
rk[i] = key[0] ^ keyTtrans(key[1] ^ key[2] ^ key[3] ^ ck[i]);
key[0] = key[1];
key[1] = key[2];
key[2] = key[3];
key[3] = rk[i];
}
return rk;
}
/**
* 加密
* @param plain 明文
* @param key 密钥
* @return 密文
*/
public static int[] encrypt(int[] plain, int[] key) {
int[] plainData=Arrays.copyOf(plain, plain.length);
int rk[] = calcRk(key);
for (int i = 0; i < ROUND; i++) {
roundFun(plainData, rk[i]);
}
reverse(plainData);
return plainData;
}
/**
* 反复加密1000000次
* @param plain
* @param key
* @return
*/
public static int[] encryptMillion(int[] plain, int[] key) {
int[] plainData=Arrays.copyOf(plain, plain.length);
int rk[] = calcRk(key);
for(int j=0;j<1000000;j++) {
for (int i = 0; i < ROUND; i++) {
roundFun(plainData, rk[i]);
}
reverse(plainData);
}
return plainData;
}
/**
* 解密
* @param cipher 密文
* @param key 密钥
* @return 明文
*/
public static int[] decrypt(int[] cipher, int[] key) {
int[] cipherData=Arrays.copyOf(cipher, cipher.length);
int rk[] = calcRk(key);
for (int i = 0; i < ROUND; i++) {
roundFun(cipherData, rk[31-i]);
}
reverse(cipherData);
return cipherData;
}
/**
* 反复解密1000000次
* @param cipher 密文
* @param key 密钥
* @return 明文
*/
public static int[] decryptMillion(int[] cipher, int[] key) {
int[] cipherData=Arrays.copyOf(cipher, cipher.length);
int rk[] = calcRk(key);
for(int j=0;j<1000000;j++) {
for (int i = 0; i < ROUND; i++) {
roundFun(cipherData, rk[31-i]);
}
reverse(cipherData);
}
return cipherData;
}
public static void main(String[] args) throws UnsupportedEncodingException {
int[] plain={0x01234567, 0x89abcdef, 0xfedcba98,0x76543210};
int[] key={0x01234567, 0x89abcdef, 0xfedcba98,0x76543210};
int[] cipher=encrypt(plain,key);
System.out.println("------------------");
System.out.println(Integer.toHexString(cipher[0]));
System.out.println(Integer.toHexString(cipher[1]));
System.out.println(Integer.toHexString(cipher[2]));
System.out.println(Integer.toHexString(cipher[3]));
int[] plain1=decrypt(cipher,key);
System.out.println("------------------");
System.out.println(Integer.toHexString(plain1[0]));
System.out.println(Integer.toHexString(plain1[1]));
System.out.println(Integer.toHexString(plain1[2]));
System.out.println(Integer.toHexString(plain1[3]));
System.out.println("------------------");
int[] cipher1=encryptMillion(plain,key);
System.out.println(Integer.toHexString(cipher1[0]));
System.out.println(Integer.toHexString(cipher1[1]));
System.out.println(Integer.toHexString(cipher1[2]));
System.out.println(Integer.toHexString(cipher1[3]));
System.out.println("------------------");
int[] plain2=decryptMillion(cipher1,key);
System.out.println(Integer.toHexString(plain2[0]));
System.out.println(Integer.toHexString(plain2[1]));
System.out.println(Integer.toHexString(plain2[2]));
System.out.println(Integer.toHexString(plain2[3]));
System.out.println("------------------");
}
}
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