1.SM4加密
package cn.cw.common.utils;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
/**
* ClassName: SM4Utils.
* Description: SM4加密工具类.
* Date:2019年3月9日.
*
* @author
* @version 1.1.0
* @since 1.7
*/
public class SM4Utils {
/**
* -默认字符集
*/
private static final String ENCODE = "UTF-8";
/**
* -加密
*/
private static final int ENCRYPT = 1;
/**
* -解密
*/
private static final int DECRYPT = 0;
/**
* -位数
*/
public static final int ROUND = 32;
/**
* -块大小
*/
private static final int BLOCK = 16;
/**
* -字符串盒子
*/
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 left1(int b) {
return b ^ rotl(b, 2) ^ rotl(b, 10) ^ rotl(b, 18) ^ rotl(b, 24);
}
private static int left2(int b) {
return b ^ rotl(b, 13) ^ rotl(b, 23);
}
private static void sms4Crypt(byte[] input, byte[] output, int[] rk) {
if (input == null) {
return;
}
int r, mid;
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] ^ left1(mid);
mid = x[2] ^ x[3] ^ x[0] ^ rk[r + 1];
mid = byteSub(mid);
x[1] = x[1] ^ left1(mid);
mid = x[3] ^ x[0] ^ x[1] ^ rk[r + 2];
mid = byteSub(mid);
x[2] = x[2] ^ left1(mid);
mid = x[0] ^ x[1] ^ x[2] ^ rk[r + 3];
mid = byteSub(mid);
x[3] = x[3] ^ left1(mid);
}
// Reverse
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] ^= left2(mid);
mid = x[2] ^ x[3] ^ x[0] ^ CK[r + 1];
mid = byteSub(mid);
rk[r + 1] = x[1] ^= left2(mid);
mid = x[3] ^ x[0] ^ x[1] ^ CK[r + 2];
mid = byteSub(mid);
rk[r + 2] = x[2] ^= left2(mid);
mid = x[0] ^ x[1] ^ x[2] ^ CK[r + 3];
mid = byteSub(mid);
rk[r + 3] = x[3] ^= left2(mid);
}
// 解密时轮密钥使用顺序：rk31,rk30,...,rk0
if (cryptFlag == DECRYPT) {
for (r = 0; r < 16; r++) {
mid = rk[r];
rk[r] = rk[31 - r];
rk[31 - r] = mid;
}
}
}
private static int sms4(byte[] in, int inLen, byte[] key, byte[] out, int cryptFlag) {
int point = 0;
int[] roundKey = new int[ROUND];
sms4KeyExt(key, roundKey, cryptFlag);
byte[] input = null;
byte[] output = new byte[16];
while (inLen >= BLOCK) {
input = Arrays.copyOfRange(in, point, point + 16);
sms4Crypt(input, output, roundKey);
System.arraycopy(output, 0, out, point, BLOCK);
inLen -= BLOCK;
point += BLOCK;
}
return 0;
}
/**
* -针对不限字节数的明文字符串和16位密钥字符串进行加密
*
* @param plaintext
* @param key
* @return
* @throws UnsupportedEncodingException
*/
public static String encodeSMS4(String plaintext, String key) throws UnsupportedEncodingException {
for (int i = plaintext.getBytes(ENCODE).length % 16; i < 16; i++) {
plaintext += '\0';
}
byte[] keyHex = key.getBytes(ENCODE);
return Base64Utils.encode(encodeSMS4(plaintext.getBytes(ENCODE), keyHex));
}
/**
* - 针对不限字节数的明文字符串和16位密钥进行加密
*
* @param plaintext
* @param key
* @return
* @throws UnsupportedEncodingException
*/
public static byte[] encodeSMS4(String plaintext, byte[] key) throws UnsupportedEncodingException {
if (plaintext == null || plaintext.equals("")) {
return null;
}
for (int i = plaintext.getBytes(ENCODE).length % 16; i < 16; i++) {
plaintext += '\0';
}
return encodeSMS4(plaintext.getBytes(ENCODE), key);
}
/**
* -针对不限字节数的明文和16位密钥进行加密
*
* @param plaintext
* @param key
* @return
*/
public static byte[] encodeSMS4(byte[] plaintext, byte[] key) {
byte[] ciphertext = new byte[plaintext.length];
int k = 0;
int plainLen = plaintext.length;
while (k + 16 <= plainLen) {
byte[] cellPlain = new byte[16];
for (int i = 0; i < 16; i++) {
cellPlain[i] = plaintext[k + i];
}
byte[] cellCipher = encode16(cellPlain, key);
for (int i = 0; i < cellCipher.length; i++) {
ciphertext[k + i] = cellCipher[i];
}
k += 16;
}
return ciphertext;
}
/**
* -针对不限长度的密文字符串和16位密钥字符串进行解密
*
* @param cipherString
* @param key
* @return
* @throws UnsupportedEncodingException
*/
public static String decodeSMS4(String cipherString, String key) throws UnsupportedEncodingException {
byte[] ciphertext = Base64Utils.decode(cipherString);
byte[] keyHex = key.getBytes(ENCODE);
return decodeSMS4toString(ciphertext, keyHex);
}
/**
* -针对不限字节数的密文和16位密钥进行解密
*
* @param ciphertext
* @param key
* @return
*/
public static byte[] decodeSMS4(byte[] ciphertext, byte[] key) {
if (ciphertext == null) {
return null;
}
byte[] plaintext = new byte[ciphertext.length];
int k = 0;
int cipherLen = ciphertext.length;
while (k + 16 <= cipherLen) {
byte[] cellCipher = new byte[16];
for (int i = 0; i < 16; i++) {
cellCipher[i] = ciphertext[k + i];
}
byte[] cellPlain = decode16(cellCipher, key);
for (int i = 0; i < cellPlain.length; i++) {
plaintext[k + i] = cellPlain[i];
}
k += 16;
}
return plaintext;
}
/**
* -针对不限字节数的密文和16位密钥进行解密,获得字符串
*
* @param ciphertext
* @param key
* @return
*/
public static String decodeSMS4toString(byte[] ciphertext, byte[] key) {
byte[] plaintext = decodeSMS4(ciphertext, key);
if (plaintext == null) {
return "";
}
return new String(plaintext).replaceAll("\0", "");
}
/**
* -针对16位明文和16位密钥进行加密
*
* @param plaintext
* @param key
* @return
*/
private static byte[] encode16(byte[] plaintext, byte[] key) {
byte[] cipher = new byte[16];
sms4(plaintext, 16, key, cipher, ENCRYPT);
return cipher;
}
/**
* -针对16位密文和16位密钥进行解密
*
* @param ciphertext
* @param key
* @return
*/
private static byte[] decode16(byte[] ciphertext, byte[] key) {
byte[] plain = new byte[16];
sms4(ciphertext, 16, key, plain, DECRYPT);
return plain;
}
public static void main(String[] args) throws Exception {
System.out.println(SM4Utils.encodeSMS4("1", "465535453546785465342345"));
System.out.println(SM4Utils.decodeSMS4(encodeSMS4("1", "465535453546785465342345"), "465535453546785465342345"));
}
}
2.Base64加密
package cn.cw.common.utils;
import android.text.TextUtils;
import android.util.Base64;
/**
* 文件名：Base64Utils
* 描 述：Base64的工具类
* 作 者：
* 时 间：2018/6/27
* 版 权：
*/
public class Base64Utils {
/**
* 方法名： encode
* 描 述： 对byte[]进行Base64编码
* 参 数： input 输入byte[]
* 返回值： java.lang.String 已编码数据
* 作 者：
* 日 期： 2018/6/27
*/
public static String encode(byte[] input){
return encode(input, Base64.DEFAULT);
}
/**
* 方法名： encode
* 描 述： 对byte[]进行Base64编码
* 参 数： input 输入byte[]
* 参 数： flags 编码方式
* 返回值： java.lang.String 已编码数据
* 作 者：
* 日 期： 2018/6/27
*/
public static String encode(byte[] input, int flags){
if (null == input || input.length == 0){
return null;
}
try {
return Base64.encodeToString(input, flags);
}catch (Exception e){
return null;
}
}
/**
* 方法名： decode
* 描 述： 对String进行Base64解码
* 参 数： str 输入的String
* 返回值： byte[] 解码后的byte[]
* 作 者：
* 日 期： 2018/6/27
*/
public static byte[] decode(String str){
return decode(str, Base64.DEFAULT);
}
/**
* 方法名： decode
* 描 述： 对String进行Base64解码
* 参 数： str 输入的String
* 参 数： flags 解码方式
* 返回值： byte[]
* 作 者：
* 日 期： 2018/6/27
*/
public static byte[] decode(String str, int flags){
if (TextUtils.isEmpty(str)){
return null;
}
try {
return Base64.decode(str, flags);
}catch (Exception e){
return null;
}
}
}