SM3、MD5、SHA256加密算法的使用

MD5、SHA256加密算法

通过spring自带的DigestUtils工具进行加密

import org.apache.commons.codec.digest.DigestUtils;


@Test
public static void main(String[] args) {

     System.out.println(DigestUtils.md5Hex("1234a").toUpperCase());
     System.out.println(DigestUtils.sha256Hex("1234").toUpperCase());

}

SM3加密算法

1、在pom中配置maven依赖

  org.bouncycastle
  bcprov-jdk15on
  1.69

2、在项目中创建所需的Java文件——SM3、SM3Digest、Util.java

        SM3.java

public class SM3 {

        public static final byte[] iv = { 0x73, (byte) 0x80, 0x16, 0x6f, 0x49,
                0x14, (byte) 0xb2, (byte) 0xb9, 0x17, 0x24, 0x42, (byte) 0xd7,
                (byte) 0xda, (byte) 0x8a, 0x06, 0x00, (byte) 0xa9, 0x6f, 0x30,
                (byte) 0xbc, (byte) 0x16, 0x31, 0x38, (byte) 0xaa, (byte) 0xe3,
                (byte) 0x8d, (byte) 0xee, 0x4d, (byte) 0xb0, (byte) 0xfb, 0x0e,
                0x4e };

        public static int[] Tj = new int[64];

        static
        {
            for (int i = 0; i < 16; i++)
            {
                Tj[i] = 0x79cc4519;
            }

            for (int i = 16; i < 64; i++)
            {
                Tj[i] = 0x7a879d8a;
            }
        }

        public static byte[] CF(byte[] V, byte[] B)
        {
            int[] v, b;
            v = convert(V);
            b = convert(B);
            return convert(CF(v, b));
        }

        private static int[] convert(byte[] arr)
        {
            int[] out = new int[arr.length / 4];
            byte[] tmp = new byte[4];
            for (int i = 0; i < arr.length; i += 4)
            {
                System.arraycopy(arr, i, tmp, 0, 4);
                out[i / 4] = bigEndianByteToInt(tmp);
            }
            return out;
        }

        private static byte[] convert(int[] arr)
        {
            byte[] out = new byte[arr.length * 4];
            byte[] tmp = null;
            for (int i = 0; i < arr.length; i++)
            {
                tmp = bigEndianIntToByte(arr[i]);
                System.arraycopy(tmp, 0, out, i * 4, 4);
            }
            return out;
        }

        public static int[] CF(int[] V, int[] B)
        {
            int a, b, c, d, e, f, g, h;
            int ss1, ss2, tt1, tt2;
            a = V[0];
            b = V[1];
            c = V[2];
            d = V[3];
            e = V[4];
            f = V[5];
            g = V[6];
            h = V[7];

            int[][] arr = expand(B);
            int[] w = arr[0];
            int[] w1 = arr[1];

            for (int j = 0; j < 64; j++)
            {
                ss1 = (bitCycleLeft(a, 12) + e + bitCycleLeft(Tj[j], j));
                ss1 = bitCycleLeft(ss1, 7);
                ss2 = ss1 ^ bitCycleLeft(a, 12);
                tt1 = FFj(a, b, c, j) + d + ss2 + w1[j];
                tt2 = GGj(e, f, g, j) + h + ss1 + w[j];
                d = c;
                c = bitCycleLeft(b, 9);
                b = a;
                a = tt1;
                h = g;
                g = bitCycleLeft(f, 19);
                f = e;
                e = P0(tt2);

		            /*System.out.print(j+" ");
		            System.out.print(Integer.toHexString(a)+" ");
		            System.out.print(Integer.toHexString(b)+" ");
		            System.out.print(Integer.toHexString(c)+" ");
		            System.out.print(Integer.toHexString(d)+" ");
		            System.out.print(Integer.toHexString(e)+" ");
		            System.out.print(Integer.toHexString(f)+" ");
		            System.out.print(Integer.toHexString(g)+" ");
		            System.out.print(Integer.toHexString(h)+" ");
		            System.out.println("");*/
            }
//		      System.out.println("");

            int[] out = new int[8];
            out[0] = a ^ V[0];
            out[1] = b ^ V[1];
            out[2] = c ^ V[2];
            out[3] = d ^ V[3];
            out[4] = e ^ V[4];
            out[5] = f ^ V[5];
            out[6] = g ^ V[6];
            out[7] = h ^ V[7];

            return out;
        }

        private static int[][] expand(int[] B)
        {
            int W[] = new int[68];
            int W1[] = new int[64];
            for (int i = 0; i < B.length; i++)
            {
                W[i] = B[i];
            }

            for (int i = 16; i < 68; i++)
            {
                W[i] = P1(W[i - 16] ^ W[i - 9] ^ bitCycleLeft(W[i - 3], 15))
                        ^ bitCycleLeft(W[i - 13], 7) ^ W[i - 6];
            }

            for (int i = 0; i < 64; i++)
            {
                W1[i] = W[i] ^ W[i + 4];
            }

            int arr[][] = new int[][] { W, W1 };
            return arr;
        }

        private static byte[] bigEndianIntToByte(int num)
        {
            return back(Util.intToBytes(num));
        }

        private static int bigEndianByteToInt(byte[] bytes)
        {
            return Util.byteToInt(back(bytes));
        }

        private static int FFj(int X, int Y, int Z, int j)
        {
            if (j >= 0 && j <= 15)
            {
                return FF1j(X, Y, Z);
            }
            else
            {
                return FF2j(X, Y, Z);
            }
        }

        private static int GGj(int X, int Y, int Z, int j)
        {
            if (j >= 0 && j <= 15)
            {
                return GG1j(X, Y, Z);
            }
            else
            {
                return GG2j(X, Y, Z);
            }
        }

        // 逻辑位运算函数
        private static int FF1j(int X, int Y, int Z)
        {
            int tmp = X ^ Y ^ Z;
            return tmp;
        }

        private static int FF2j(int X, int Y, int Z)
        {
            int tmp = ((X & Y) | (X & Z) | (Y & Z));
            return tmp;
        }

        private static int GG1j(int X, int Y, int Z)
        {
            int tmp = X ^ Y ^ Z;
            return tmp;
        }

        private static int GG2j(int X, int Y, int Z)
        {
            int tmp = (X & Y) | (~X & Z);
            return tmp;
        }

        private static int P0(int X)
        {
            int y = rotateLeft(X, 9);
            y = bitCycleLeft(X, 9);
            int z = rotateLeft(X, 17);
            z = bitCycleLeft(X, 17);
            int t = X ^ y ^ z;
            return t;
        }

        private static int P1(int X)
        {
            int t = X ^ bitCycleLeft(X, 15) ^ bitCycleLeft(X, 23);
            return t;
        }

        /**
         * 对最后一个分组字节数据padding
         *
         * @param in
         * @param bLen
         *            分组个数
         * @return
         */
        public static byte[] padding(byte[] in, int bLen)
        {
            int k = 448 - (8 * in.length + 1) % 512;
            if (k < 0)
            {
                k = 960 - (8 * in.length + 1) % 512;
            }
            k += 1;
            byte[] padd = new byte[k / 8];
            padd[0] = (byte) 0x80;
            long n = in.length * 8 + bLen * 512;
            byte[] out = new byte[in.length + k / 8 + 64 / 8];
            int pos = 0;
            System.arraycopy(in, 0, out, 0, in.length);
            pos += in.length;
            System.arraycopy(padd, 0, out, pos, padd.length);
            pos += padd.length;
            byte[] tmp = back(Util.longToBytes(n));
            System.arraycopy(tmp, 0, out, pos, tmp.length);
            return out;
        }

        /**
         * 字节数组逆序
         *
         * @param in
         * @return
         */
        private static byte[] back(byte[] in)
        {
            byte[] out = new byte[in.length];
            for (int i = 0; i < out.length; i++)
            {
                out[i] = in[out.length - i - 1];
            }

            return out;
        }

        public static int rotateLeft(int x, int n)
        {
            return (x << n) | (x >> (32 - n));
        }

        private static int bitCycleLeft(int n, int bitLen)
        {
            bitLen %= 32;
            byte[] tmp = bigEndianIntToByte(n);
            int byteLen = bitLen / 8;
            int len = bitLen % 8;
            if (byteLen > 0)
            {
                tmp = byteCycleLeft(tmp, byteLen);
            }

            if (len > 0)
            {
                tmp = bitSmall8CycleLeft(tmp, len);
            }

            return bigEndianByteToInt(tmp);
        }

        private static byte[] bitSmall8CycleLeft(byte[] in, int len)
        {
            byte[] tmp = new byte[in.length];
            int t1, t2, t3;
            for (int i = 0; i < tmp.length; i++)
            {
                t1 = (byte) ((in[i] & 0x000000ff) << len);
                t2 = (byte) ((in[(i + 1) % tmp.length] & 0x000000ff) >> (8 - len));
                t3 = (byte) (t1 | t2);
                tmp[i] = (byte) t3;
            }

            return tmp;
        }

        private static byte[] byteCycleLeft(byte[] in, int byteLen)
        {
            byte[] tmp = new byte[in.length];
            System.arraycopy(in, byteLen, tmp, 0, in.length - byteLen);
            System.arraycopy(in, 0, tmp, in.length - byteLen, byteLen);
            return tmp;
        }



}

        SM3Digest.java

import org.bouncycastle.util.encoders.Hex;

public class SM3Digest {
    /** SM3值的长度 */
    private static final int BYTE_LENGTH = 32;

    /** SM3分组长度 */
    private static final int BLOCK_LENGTH = 64;

    /** 缓冲区长度 */
    private static final int BUFFER_LENGTH = BLOCK_LENGTH * 1;

    /** 缓冲区 */
    private byte[] xBuf = new byte[BUFFER_LENGTH];

    /** 缓冲区偏移量 */
    private int xBufOff;

    /** 初始向量 */
    private byte[] V = SM3.iv.clone();

    private int cntBlock = 0;

    public SM3Digest() {
    }

    public SM3Digest(SM3Digest t)
    {
        System.arraycopy(t.xBuf, 0, this.xBuf, 0, t.xBuf.length);
        this.xBufOff = t.xBufOff;
        System.arraycopy(t.V, 0, this.V, 0, t.V.length);
    }

    /**
     * SM3结果输出
     *
     * @param out 保存SM3结构的缓冲区
     * @param outOff 缓冲区偏移量
     * @return
     */
    public int doFinal(byte[] out, int outOff)
    {
        byte[] tmp = doFinal();
        System.arraycopy(tmp, 0, out, 0, tmp.length);
        return BYTE_LENGTH;
    }

    public void reset()
    {
        xBufOff = 0;
        cntBlock = 0;
        V = SM3.iv.clone();
    }

    /**
     * 明文输入
     *
     * @param in
     *            明文输入缓冲区
     * @param inOff
     *            缓冲区偏移量
     * @param len
     *            明文长度
     */
    public void update(byte[] in, int inOff, int len)
    {
        int partLen = BUFFER_LENGTH - xBufOff;
        int inputLen = len;
        int dPos = inOff;
        if (partLen < inputLen)
        {
            System.arraycopy(in, dPos, xBuf, xBufOff, partLen);
            inputLen -= partLen;
            dPos += partLen;
            doUpdate();
            while (inputLen > BUFFER_LENGTH)
            {
                System.arraycopy(in, dPos, xBuf, 0, BUFFER_LENGTH);
                inputLen -= BUFFER_LENGTH;
                dPos += BUFFER_LENGTH;
                doUpdate();
            }
        }

        System.arraycopy(in, dPos, xBuf, xBufOff, inputLen);
        xBufOff += inputLen;
    }

    private void doUpdate()
    {
        byte[] B = new byte[BLOCK_LENGTH];
        for (int i = 0; i < BUFFER_LENGTH; i += BLOCK_LENGTH)
        {
            System.arraycopy(xBuf, i, B, 0, B.length);
            doHash(B);
        }
        xBufOff = 0;
    }

    private void doHash(byte[] B)
    {
        byte[] tmp = SM3.CF(V, B);
        System.arraycopy(tmp, 0, V, 0, V.length);
        cntBlock++;
    }

    private byte[] doFinal()
    {
        byte[] B = new byte[BLOCK_LENGTH];
        byte[] buffer = new byte[xBufOff];
        System.arraycopy(xBuf, 0, buffer, 0, buffer.length);
        byte[] tmp = SM3.padding(buffer, cntBlock);
        for (int i = 0; i < tmp.length; i += BLOCK_LENGTH)
        {
            System.arraycopy(tmp, i, B, 0, B.length);
            doHash(B);
        }
        return V;
    }

    public void update(byte in)
    {
        byte[] buffer = new byte[] { in };
        update(buffer, 0, 1);
    }

    public int getDigestSize()
    {
        return BYTE_LENGTH;
    }

    public static void main(String[] args)
    {
        byte[] md = new byte[32];
        byte[] msg1 = "ererfeiisgod".getBytes();
        SM3Digest sm3 = new SM3Digest();
        sm3.update(msg1, 0, msg1.length);
        sm3.doFinal(md, 0);
        String s = new String(Hex.encode(md));
        System.out.println(s.toUpperCase());
    }
}

        Util.java

import java.math.BigInteger;

class Util {
    /**
     * 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);
    }

    /**
     * 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'};

    /**
     * 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 true 传换成小写格式 ， false 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[]
     * @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 true 传换成小写格式 ， false 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;
    }

    /**
     * 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;
    }

    /**
     * 数字字符串转ASCII码字符串
     *
     * @param
     * @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
     *
     * @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;
    }
}

 实现SM3加密算法

/**
     * SM3加密
     * @param 
     * @return
     */
public static String encrypt(String src) {
    return ByteUtils.toHexString(getEncryptBySrcByte(src.getBytes()));
}

public static byte[] getEncryptBySrcByte(byte[] srcByte) {
    SM3Digest sm3 = new SM3Digest();
    sm3.update(srcByte, 0, srcByte.length);
    byte[] encryptByte = new byte[sm3.getDigestSize()];
    sm3.doFinal(encryptByte, 0);
    return encryptByte;
}



在执行方法时调用上面写的SM3的encrypt方法进行加密
@Test
public static void main(String[] args) {

    System.out.println("-----------");
    System.out.println(encrypt("111").toUpperCase());

}

MD5、SHA256、SM3加密示例

@Test
void jiami() {

    System.out.println(DigestUtils.md5Hex("1234a").toUpperCase());
    System.out.println(DigestUtils.sha256Hex("1234").toUpperCase());
    System.out.println("-----------");
    System.out.println(encrypt("111").toUpperCase());
        
}

结果