android加密工具类2

1.SM4加密

package cn.cw.common.utils;

import java.io.UnsupportedEncodingException;
import java.util.Arrays;


/**
 * ClassName: <p>SM4Utils.</p>
 * Description: <p>SM4加密工具类.</p>
 * Date:2019年3月9日. <br/>
 *
 * @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 <p>
 * 描  述:Base64的工具类 <p>
 * 作  者: <p>
 * 时  间:2018/6/27 <p>
 * 版  权: <p>
 */

public class Base64Utils {

    /**
    * 方法名: encode <p>
    * 描  述: 对byte[]进行Base64编码 <p>
    * 参  数: input 输入byte[] <p>
    * 返回值: java.lang.String  已编码数据 <p>
    * 作  者: <p>
    * 日  期: 2018/6/27 <p>
    */
    public static String encode(byte[] input){
        return encode(input, Base64.DEFAULT);
    }

    /**
    * 方法名: encode <p>
    * 描  述: 对byte[]进行Base64编码 <p>
    * 参  数: input  输入byte[] <p>
    * 参  数: flags  编码方式 <p>
    * 返回值: java.lang.String   已编码数据 <p>
    * 作  者:  <p>
    * 日  期: 2018/6/27 <p>
    */
    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 <p>
    * 描  述: 对String进行Base64解码 <p>
    * 参  数: str  输入的String <p>
    * 返回值: byte[]  解码后的byte[] <p>
    * 作  者:  <p>
    * 日  期: 2018/6/27 <p>
    */
    public static byte[] decode(String str){
        return decode(str, Base64.DEFAULT);
    }

    /**
    * 方法名: decode <p>
    * 描  述: 对String进行Base64解码 <p>
    * 参  数: str  输入的String <p>
    * 参  数: flags  解码方式 <p>
    * 返回值: byte[] <p>
    * 作  者: <p>
    * 日  期: 2018/6/27 <p>
    */
    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;
        }
    }
}  

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