SMS4(java版国密算法的加密与解密)

男娘i 2022-03-18 15:52 881阅读 0赞

Convert与SMS4均为sms4的算法实现方法，sms4类里面有Encryption加密方法Decrypt为解密方法

建议直接拷贝Convert和SMS4类(因为里面的方法比较长)，可以直接运行，得到其运行的结果。

package cn.myapps.core.security.sms4;
    
    import java.math.BigInteger;
    public class Convert {
    	/**
    	 * 用于建立十六进制字符的输出的小写字符数组
    	 */
    	private static final char[] DIGITS_LOWER = { '0', '1', '2', '3', '4', '5',
    			'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
    	/**
    	 * 用于建立十六进制字符的输出的大写字符数组
    	 */
    	private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5',
    			'6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
    
    	/**
    	 * 整形转换成网络传输的字节流（字节数组）型数据
    	 *
    	 * @param num 一个整型数据
    	 * @return 4个字节的自己数组
    	 */
    	public static byte[] intToBytes(int num) {
    		byte[] bytes = new byte[4];
    		bytes[0] = (byte) (0xff & (num >> 0));
    		bytes[1] = (byte) (0xff & (num >> 8));
    		bytes[2] = (byte) (0xff & (num >> 16));
    		bytes[3] = (byte) (0xff & (num >> 24));
    		return bytes;
    	}
    
    	/**
    	 * 四个字节的字节数据转换成一个整形数据
    	 *
    	 * @param bytes 4个字节的字节数组
    	 * @return 一个整型数据
    	 */
    	public static int byteToInt(byte[] bytes) {
    		int num = 0;
    		int temp;
    		temp = (0x000000ff & (bytes[0])) << 0;
    		num = num | temp;
    		temp = (0x000000ff & (bytes[1])) << 8;
    		num = num | temp;
    		temp = (0x000000ff & (bytes[2])) << 16;
    		num = num | temp;
    		temp = (0x000000ff & (bytes[3])) << 24;
    		num = num | temp;
    		return num;
    	}
    
    	/**
    	 * 长整形转换成网络传输的字节流（字节数组）型数据
    	 *
    	 * @param num 一个长整型数据
    	 * @return 4个字节的自己数组
    	 */
    	public static byte[] longToBytes(long num) {
    		byte[] bytes = new byte[8];
    		for(int i = 0; i < 8; i++) {
    			bytes[i] = (byte) (0xff & (num >> (i * 8)));
    		}
    
    		return bytes;
    	}
    
    	/**
    	 * 大数字转换字节流（字节数组）型数据
    	 *
    	 * @param n
    	 * @return
    	 */
    	public static byte[] byteConvert32Bytes(BigInteger n) {
    		byte tmpd[] = (byte[]) null;
    		if(n == null) {
    			return null;
    		}
    
    		if(n.toByteArray().length == 33) {
    			tmpd = new byte[32];
    			System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);
    		}
    		else if(n.toByteArray().length == 32) {
    			tmpd = n.toByteArray();
    		}
    		else {
    			tmpd = new byte[32];
    			for(int i = 0; i < 32 - n.toByteArray().length; i++) {
    				tmpd[i] = 0;
    			}
    			System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);
    		}
    		return tmpd;
    	}
    
    	/**
    	 * 换字节流（字节数组）型数据转大数字
    	 *
    	 * @param b
    	 * @return
    	 */
    	public static BigInteger byteConvertInteger(byte[] b) {
    		if(b[0] < 0) {
    			byte[] temp = new byte[b.length + 1];
    			temp[0] = 0;
    			System.arraycopy(b, 0, temp, 1, b.length);
    			return new BigInteger(temp);
    		}
    		return new BigInteger(b);
    	}
    
    	/**
    	 * 根据字节数组获得值(十六进制数字)
    	 *
    	 * @param bytes
    	 * @return
    	 */
    	public static String getHexString(byte[] bytes) {
    		return getHexString(bytes, true);
    	}
    
    	/**
    	 * 根据字节数组获得值(十六进制数字)
    	 *
    	 * @param bytes
    	 * @param upperCase
    	 * @return
    	 */
    	public static String getHexString(byte[] bytes, boolean upperCase) {
    		String ret = "";
    		for(int i = 0; i < bytes.length; i++) {
    			ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);
    		}
    		return upperCase ? ret.toUpperCase() : ret;
    	}
    
    	/**
    	 * 打印十六进制字符串
    	 *
    	 * @param bytes
    	 */
    	public static void printHexString(byte[] bytes) {
    		for(int i = 0; i < bytes.length; i++) {
    			String hex = Integer.toHexString(bytes[i] & 0xFF);
    			if(hex.length() == 1) {
    				hex = '0' + hex;
    			}
    			System.out.print("0x" + hex.toUpperCase() + ",");
    		}
    		System.out.println("");
    	}
    
    	/**
    	 * Convert hex string to byte[]
    	 *
    	 * @param hexString the hex string
    	 * @return byte[]
    	 */
    	public static byte[] hexStringToBytes(String hexString) {
    		if(hexString == null || hexString.equals("")) {
    			return null;
    		}
    
    		hexString = hexString.toUpperCase();
    		int length = hexString.length() / 2;
    		char[] hexChars = hexString.toCharArray();
    		byte[] d = new byte[length];
    		for(int i = 0; i < length; i++) {
    			int pos = i * 2;
    			d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
    		}
    		return d;
    	}
    
    	/**
    	 * Convert char to byte
    	 *
    	 * @param c char
    	 * @return byte
    	 */
    	public static byte charToByte(char c) {
    		return (byte) "0123456789ABCDEF".indexOf(c);
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符数组
    	 *
    	 * @param data byte[]
    	 * @return 十六进制char[]
    	 */
    	public static char[] encodeHex(byte[] data) {
    		return encodeHex(data, true);
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符数组
    	 *
    	 * @param data        byte[]
    	 * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
    	 * @return 十六进制char[]
    	 */
    	public static char[] encodeHex(byte[] data, boolean toLowerCase) {
    		return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符串
    	 *
    	 * @param data byte[]
    	 * @return 十六进制String
    	 */
    	public static String encodeHexString(byte[] data) {
    		return encodeHexString(data, true);
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符串
    	 *
    	 * @param data        byte[]
    	 * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
    	 * @return 十六进制String
    	 */
    	public static String encodeHexString(byte[] data, boolean toLowerCase) {
    		return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
    	}
    
    	/**
    	 * 将十六进制字符数组转换为字节数组
    	 *
    	 * @param data 十六进制char[]
    	 * @return byte[]
    	 * @throws RuntimeException 如果源十六进制字符数组是一个奇怪的长度，将抛出运行时异常
    	 */
    	public static byte[] decodeHex(char[] data) {
    		int len = data.length;
    
    		if((len & 0x01) != 0) {
    			throw new RuntimeException("Odd number of characters.");
    		}
    
    		byte[] out = new byte[len >> 1];
    
    		// two characters form the hex value.
    		for(int i = 0, j = 0; j < len; i++) {
    			int f = toDigit(data[j], j) << 4;
    			j++;
    			f = f | toDigit(data[j], j);
    			j++;
    			out[i] = (byte) (f & 0xFF);
    		}
    
    		return out;
    	}
    
    	/**
    	 * 数字字符串转ASCII码字符串
    	 *
    	 * @param String 字符串
    	 * @return ASCII字符串
    	 */
    	public static String StringToAsciiString(String content) {
    		String result = "";
    		int max = content.length();
    		for(int i = 0; i < max; i++) {
    			char c = content.charAt(i);
    			String b = Integer.toHexString(c);
    			result = result + b;
    		}
    		return result;
    	}
    
    	/**
    	 * 十六进制转字符串
    	 *
    	 * @param hexString  十六进制字符串
    	 * @param encodeType 编码类型4：Unicode，2：普通编码
    	 * @return 字符串
    	 */
    	public static String hexStringToString(String hexString, int encodeType) {
    		String result = "";
    		int max = hexString.length() / encodeType;
    		for(int i = 0; i < max; i++) {
    			char c = (char) hexStringToAlgorism(hexString
    					.substring(i * encodeType, (i + 1) * encodeType));
    			result += c;
    		}
    		return result;
    	}
    
    	/**
    	 * 十六进制字符串装十进制
    	 *
    	 * @param hex 十六进制字符串
    	 * @return 十进制数值
    	 */
    	public static int hexStringToAlgorism(String hex) {
    		hex = hex.toUpperCase();
    		int max = hex.length();
    		int result = 0;
    		for(int i = max; i > 0; i--) {
    			char c = hex.charAt(i - 1);
    			int algorism = 0;
    			if(c >= '0' && c <= '9') {
    				algorism = c - '0';
    			}
    			else {
    				algorism = c - 55;
    			}
    			result += Math.pow(16, max - i) * algorism;
    		}
    		return result;
    	}
    
    	/**
    	 * 十六转二进制
    	 *
    	 * @param hex 十六进制字符串
    	 * @return 二进制字符串
    	 */
    	public static String hexStringToBinary(String hex) {
    		hex = hex.toUpperCase();
    		String result = "";
    		int max = hex.length();
    		for(int i = 0; i < max; i++) {
    			char c = hex.charAt(i);
    			switch(c) {
    				case '0':
    					result += "0000";
    					break;
    				case '1':
    					result += "0001";
    					break;
    				case '2':
    					result += "0010";
    					break;
    				case '3':
    					result += "0011";
    					break;
    				case '4':
    					result += "0100";
    					break;
    				case '5':
    					result += "0101";
    					break;
    				case '6':
    					result += "0110";
    					break;
    				case '7':
    					result += "0111";
    					break;
    				case '8':
    					result += "1000";
    					break;
    				case '9':
    					result += "1001";
    					break;
    				case 'A':
    					result += "1010";
    					break;
    				case 'B':
    					result += "1011";
    					break;
    				case 'C':
    					result += "1100";
    					break;
    				case 'D':
    					result += "1101";
    					break;
    				case 'E':
    					result += "1110";
    					break;
    				case 'F':
    					result += "1111";
    					break;
    			}
    		}
    		return result;
    	}
    
    	/**
    	 * ASCII码字符串转数字字符串
    	 *
    	 * @param String ASCII字符串
    	 * @return 字符串
    	 */
    	public static String AsciiStringToString(String content) {
    		String result = "";
    		int length = content.length() / 2;
    		for(int i = 0; i < length; i++) {
    			String c = content.substring(i * 2, i * 2 + 2);
    			int a = hexStringToAlgorism(c);
    			char b = (char) a;
    			String d = String.valueOf(b);
    			result += d;
    		}
    		return result;
    	}
    
    	/**
    	 * 将十进制转换为指定长度的十六进制字符串
    	 *
    	 * @param algorism  int 十进制数字
    	 * @param maxLength int 转换后的十六进制字符串长度
    	 * @return String 转换后的十六进制字符串
    	 */
    	public static String algorismToHexString(int algorism, int maxLength) {
    		String result = "";
    		result = Integer.toHexString(algorism);
    
    		if(result.length() % 2 == 1) {
    			result = "0" + result;
    		}
    		return patchHexString(result.toUpperCase(), maxLength);
    	}
    
    	/**
    	 * 字节数组转为普通字符串（ASCII对应的字符）
    	 *
    	 * @param bytearray byte[]
    	 * @return String
    	 */
    	public static String byteToString(byte[] bytearray) {
    		String result = "";
    		char temp;
    
    		int length = bytearray.length;
    		for(int i = 0; i < length; i++) {
    			temp = (char) bytearray[i];
    			result += temp;
    		}
    		return result;
    	}
    
    	/**
    	 * 二进制字符串转十进制
    	 *
    	 * @param binary 二进制字符串
    	 * @return 十进制数值
    	 */
    	public static int binaryToAlgorism(String binary) {
    		int max = binary.length();
    		int result = 0;
    		for(int i = max; i > 0; i--) {
    			char c = binary.charAt(i - 1);
    			int algorism = c - '0';
    			result += Math.pow(2, max - i) * algorism;
    		}
    		return result;
    	}
    
    	/**
    	 * 十进制转换为十六进制字符串
    	 *
    	 * @param algorism int 十进制的数字
    	 * @return String 对应的十六进制字符串
    	 */
    	public static String algorismToHEXString(int algorism) {
    		String result = "";
    		result = Integer.toHexString(algorism);
    
    		if(result.length() % 2 == 1) {
    			result = "0" + result;
    
    		}
    		result = result.toUpperCase();
    
    		return result;
    	}
    
    	/**
    	 * HEX字符串前补0，主要用于长度位数不足。
    	 *
    	 * @param str       String 需要补充长度的十六进制字符串
    	 * @param maxLength int 补充后十六进制字符串的长度
    	 * @return 补充结果
    	 */
    	static public String patchHexString(String str, int maxLength) {
    		String temp = "";
    		for(int i = 0; i < maxLength - str.length(); i++) {
    			temp = "0" + temp;
    		}
    		str = (temp + str).substring(0, maxLength);
    		return str;
    	}
    
    	/**
    	 * 将一个字符串转换为int
    	 *
    	 * @param s          String 要转换的字符串
    	 * @param defaultInt int 如果出现异常,默认返回的数字
    	 * @param radix      int 要转换的字符串是什么进制的,如16 8 10.
    	 * @return int 转换后的数字
    	 */
    	public static int parseToInt(String s, int defaultInt, int radix) {
    		int i = 0;
    		try {
    			i = Integer.parseInt(s, radix);
    		}
    		catch(NumberFormatException ex) {
    			i = defaultInt;
    		}
    		return i;
    	}
    
    	/**
    	 * 将一个十进制形式的数字字符串转换为int
    	 *
    	 * @param s          String 要转换的字符串
    	 * @param defaultInt int 如果出现异常,默认返回的数字
    	 * @return int 转换后的数字
    	 */
    	public static int parseToInt(String s, int defaultInt) {
    		int i = 0;
    		try {
    			i = Integer.parseInt(s);
    		}
    		catch(NumberFormatException ex) {
    			i = defaultInt;
    		}
    		return i;
    	}
    
    	/**
    	 * 十六进制串转化为byte数组
    	 *
    	 * @return the array of byte
    	 */
    	public static byte[] hexToByte(String hex)
    			throws IllegalArgumentException {
    		if(hex.length() % 2 != 0) {
    			throw new IllegalArgumentException();
    		}
    		char[] arr = hex.toCharArray();
    		byte[] b = new byte[hex.length() / 2];
    		for(int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
    			String swap = "" + arr[i++] + arr[i];
    			int byteint = Integer.parseInt(swap, 16) & 0xFF;
    			b[j] = new Integer(byteint).byteValue();
    		}
    		return b;
    	}
    
    	/**
    	 * 字节数组转换为十六进制字符串
    	 *
    	 * @param b byte[] 需要转换的字节数组
    	 * @return String 十六进制字符串
    	 */
    	public static String byteToHex(byte b[]) {
    		if(b == null) {
    			throw new IllegalArgumentException(
    					"Argument b ( byte array ) is null! ");
    		}
    		String hs = "";
    		String stmp = "";
    		for(int n = 0; n < b.length; n++) {
    			stmp = Integer.toHexString(b[n] & 0xff);
    			if(stmp.length() == 1) {
    				hs = hs + "0" + stmp;
    			}
    			else {
    				hs = hs + stmp;
    			}
    		}
    		return hs.toUpperCase();
    	}
    
    	public static byte[] subByte(byte[] input, int startIndex, int length) {
    		byte[] bt = new byte[length];
    		for(int i = 0; i < length; i++) {
    			bt[i] = input[i + startIndex];
    		}
    		return bt;
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符数组
    	 *
    	 * @param data     byte[]
    	 * @param toDigits 用于控制输出的char[]
    	 * @return 十六进制char[]
    	 */
    	protected static char[] encodeHex(byte[] data, char[] toDigits) {
    		int l = data.length;
    		char[] out = new char[l << 1];
    		// two characters form the hex value.
    		for(int i = 0, j = 0; i < l; i++) {
    			out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
    			out[j++] = toDigits[0x0F & data[i]];
    		}
    		return out;
    	}
    
    	/**
    	 * 将字节数组转换为十六进制字符串
    	 *
    	 * @param data     byte[]
    	 * @param toDigits 用于控制输出的char[]
    	 * @return 十六进制String
    	 */
    	protected static String encodeHexString(byte[] data, char[] toDigits) {
    		return new String(encodeHex(data, toDigits));
    	}
    
    	/**
    	 * 将十六进制字符转换成一个整数
    	 *
    	 * @param ch    十六进制char
    	 * @param index 十六进制字符在字符数组中的位置
    	 * @return 一个整数
    	 * @throws RuntimeException 当ch不是一个合法的十六进制字符时，抛出运行时异常
    	 */
    	protected static int toDigit(char ch, int index) {
    		int digit = Character.digit(ch, 16);
    		if(digit == -1) {
    			throw new RuntimeException("Illegal hexadecimal character " + ch
    					+ " at index " + index);
    		}
    		return digit;
    	}
    }

package cn.myapps.core.security.sms4;
    
    import java.util.Arrays;
    
    import javax.crypto.Cipher;
    import javax.crypto.spec.IvParameterSpec;
    import javax.crypto.spec.SecretKeySpec;
    
    /**
     * SMS4国密算法
     */
    public class SMS4 {
    	private static byte[] key = "JeF8U9wHFOMfs2S3".getBytes();
    	public static final int ROUND = 32;
    	private static final int ENCRYPT = 1;
    	private static final int DECRYPT = 0;
    	private static final int BLOCK = 16;
    	private 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 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 byte[] encodeSMS4(String plaintext, byte[] key)
    			throws Exception {
    		if (plaintext == null || plaintext.equals("")) {
    			return null;
    		}
    		return SMS4.encodeSMS4(encryptDES(plaintext).getBytes(), key);
    		/*
    		 * StringBuilder plaintextBuilder = new StringBuilder(plaintext);
    		 * for(int i = plaintextBuilder.toString().getBytes().length % 16; i <
    		 * 16; i++) { plaintextBuilder.append(" "); } plaintext =
    		 * plaintextBuilder.toString(); return
    		 * SMS4.encodeSMS4(plaintext.getBytes(), key);
    		 */
    	}
    
    	/**
    	 * 不限明文长度的SMS4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];
    			System.arraycopy(plaintext, k, cellPlain, 0, 16);
    			byte[] cellCipher = encode16(cellPlain, key);
    			System.arraycopy(cellCipher, 0, ciphertext, k, cellCipher.length);
    			k += 16;
    		}
    		return ciphertext;
    	}
    
    	/**
    	 * 不限明文长度的SMS4解密
    	 *
    	 * @param ciphertext
    	 * @param key
    	 * @return
    	 */
    	public static byte[] decodeSMS4(byte[] ciphertext, byte[] key) {
    		byte[] plaintext = new byte[ciphertext.length];
    		int k = 0;
    		int cipherLen = ciphertext.length;
    		while (k + 16 <= cipherLen) {
    			byte[] cellCipher = new byte[16];
    			System.arraycopy(ciphertext, k, cellCipher, 0, 16);
    			byte[] cellPlain = decode16(cellCipher, key);
    			System.arraycopy(cellPlain, 0, plaintext, k, cellPlain.length);
    			k += 16;
    		}
    		return plaintext;
    	}
    
    	/**
    	 * 解密，获得明文字符串
    	 *
    	 * @param ciphertext
    	 * @param key
    	 * @return
    	 */
    	public static String decodeSMS4toString(byte[] ciphertext, byte[] key)
    			throws Exception {
    		byte[] plaintext = decodeSMS4(ciphertext, key);
    
    		return decryptDES(new String(plaintext));
    	}
    
    	/**
    	 * 只加密16位明文
    	 *
    	 * @param plaintext
    	 * @param key
    	 * @return
    	 */
    	private static byte[] encode16(byte[] plaintext, byte[] key) {
    		byte[] cipher = new byte[16];
    		SMS4 sm4 = new SMS4();
    		sm4.sms4(plaintext, 16, key, cipher, ENCRYPT);
    		return cipher;
    	}
    
    	/**
    	 * 只解密16位密文
    	 *
    	 * @param plaintext
    	 * @param key
    	 * @return
    	 */
    	private static byte[] decode16(byte[] ciphertext, byte[] key) {
    		byte[] plain = new byte[16];
    		SMS4 sm4 = new SMS4();
    		sm4.sms4(ciphertext, 16, key, plain, DECRYPT);
    		return plain;
    	}
    
    	public 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;
    		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;
    	}
    
    	private int Rotl(int x, int y) {
    		return x << y | x >>> (32 - y);
    	}
    
    	private 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 int L1(int B) {
    		return B ^ Rotl(B, 2) ^ Rotl(B, 10) ^ Rotl(B, 18) ^ Rotl(B, 24);
    	}
    
    	private int L2(int B) {
    		return B ^ Rotl(B, 13) ^ Rotl(B, 23);
    	}
    
    	@SuppressWarnings("unused")
    	private 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[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];
    			mid = ByteSub(mid);
    			x[0] = x[0] ^ L1(mid); // x4
    
    			mid = x[2] ^ x[3] ^ x[0] ^ rk[r + 1];
    			mid = ByteSub(mid);
    			x[1] = x[1] ^ L1(mid); // x5
    
    			mid = x[3] ^ x[0] ^ x[1] ^ rk[r + 2];
    			mid = ByteSub(mid);
    			x[2] = x[2] ^ L1(mid); // x6
    
    			mid = x[0] ^ x[1] ^ x[2] ^ rk[r + 3];
    			mid = ByteSub(mid);
    			x[3] = x[3] ^ L1(mid); // x7
    		}
    
    		// 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 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[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];
    			mid = ByteSub(mid);
    			rk[r] = x[0] ^= L2(mid); // rk0=K4
    
    			mid = x[2] ^ x[3] ^ x[0] ^ CK[r + 1];
    			mid = ByteSub(mid);
    			rk[r + 1] = x[1] ^= L2(mid); // rk1=K5
    
    			mid = x[3] ^ x[0] ^ x[1] ^ CK[r + 2];
    			mid = ByteSub(mid);
    			rk[r + 2] = x[2] ^= L2(mid); // rk2=K6
    
    			mid = x[0] ^ x[1] ^ x[2] ^ CK[r + 3];
    			mid = ByteSub(mid);
    			rk[r + 3] = x[3] ^= L2(mid); // rk3=K7
    		}
    
    		// 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 final String PASSWORD_CRYPT_KEY = "CSSssDes";
    	private static byte[] iv = { 1, 2, 3, 4, 5, 6, 7, 8 };
    
    	/**
    	 * Str转16位
    	 *
    	 * @param plaintext
    	 * @param key
    	 * @return
    	 */
    	public static String encryptDES(String encryptString) throws Exception {
    		IvParameterSpec zeroIv = new IvParameterSpec(iv);
    		SecretKeySpec key = new SecretKeySpec(PASSWORD_CRYPT_KEY.getBytes(),
    				"DES");
    		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    		cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
    		byte[] encryptedData = cipher.doFinal(encryptString.getBytes());
    		String hexString = parseByte2HexStr(encryptedData);
    		return hexString;
    		// return Base64.encode(encryptedData);
    	}
    
    	/**
    	 * 16位转str
    	 *
    	 * @param plaintext
    	 * @param key
    	 * @return
    	 */
    	public static String decryptDES(String decryptString) throws Exception {
    		// byte[] byteMi = Base64.decode(decryptString);
    		byte[] byteMi = hex2byte(decryptString.getBytes());
    		IvParameterSpec zeroIv = new IvParameterSpec(iv);
    		SecretKeySpec key = new SecretKeySpec(PASSWORD_CRYPT_KEY.getBytes(),
    				"DES");
    		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
    		cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
    		byte decryptedData[] = cipher.doFinal(byteMi);
    
    		return new String(decryptedData);
    	}
    
    	public static String parseByte2HexStr(byte buf[]) {
    		StringBuffer sb = new StringBuffer();
    		for (int i = 0; i < buf.length; i++) {
    			String hex = Integer.toHexString(buf[i] & 0xFF);
    			if (hex.length() == 1) {
    				hex = '0' + hex;
    			}
    			sb.append(hex.toUpperCase());
    		}
    		return sb.toString();
    	}
    
    	public static byte[] hex2byte(byte[] b) {
    		if ((b.length % 2) != 0)
    			throw new IllegalArgumentException("长度不是偶数");
    		byte[] b2 = new byte[b.length / 2];
    		for (int n = 0; n < b.length; n += 2) {
    			String item = new String(b, n, 2);
    			b2[n / 2] = (byte) Integer.parseInt(item, 16);
    		}
    		return b2;
    	}
    
    	/**
    	 * 加密字符串为SMS4密文
    	 * 
    	 * @param encodingStr
    	 * @return
    	 */
    	public static String Encryption(String encodingStr) {
    		try {
    			byte[] enOut = SMS4.encodeSMS4(encodingStr, key);
    			return Convert.byteToHex(enOut);
    		} catch (Exception e) {
    			e.printStackTrace();
    			return null;
    		}
    	}
    
    	/**
    	 * 解密SMS4密文
    	 * 
    	 * @param Redaction
    	 * @return
    	 */
    	public static String Decrypt(String Redaction) {
    		try {
    			byte[] bytes = Convert.hexStringToBytes(Redaction);
    			String deOutStr = SMS4.decodeSMS4toString(bytes, key);
    			return deOutStr.trim();
    		} catch (Exception e) {
    			e.printStackTrace();
    			return null;
    		}
    	}
    }

运行效果图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d3dzEwNTY0ODExNjc_size_16_color_FFFFFF_t_70][]

百度网盘下载地址：[链接: https://pan.baidu.com/s/1ct1USog3lNmEUX2pElvVEA 提取码: j6tr][https_pan.baidu.com_s_1ct1USog3lNmEUX2pElvVEA _ j6tr]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d3dzEwNTY0ODExNjc_size_16_color_FFFFFF_t_70]: /images/20220318/0a4023f4e3b5463287c00dfdfcdaeee0.png
[https_pan.baidu.com_s_1ct1USog3lNmEUX2pElvVEA _ j6tr]: https://pan.baidu.com/s/1MhhYjjxAQvgUrjUQzMJJgQ