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  • SM Java实现

    【摘要】

    本文主要解说“国密加密算法”SM系列的Java实现方法,不涉及详细的算法剖析,在网络上找到的java实现方法比較少。切在跨语言加密解密上会存在一些问题。所以整理此文志之。

    源代码下载地址http://download.csdn.net/detail/ererfei/9474502 须要C#实现SM系列算法源代码的能够评论留邮箱地址,看到后发送

    1.SM2 & SM3

    因为SM2算法中须要使用SM3摘要算法,所以把他们放在一起

    项目文件夹结构例如以下:


    首先要下载一个jar包——bcprov-jdk.jar,能够到maven库中下载最新版http://central.maven.org/maven2/org/bouncycastle/并将该jar包引入项目的classpath。实现代码例如以下(每一个工具类都有Main能够执行測试):

    a.      SM2主类

    【SM2.java】

    package com.mlq.sm;
    
    import java.math.BigInteger;
    import java.security.SecureRandom;
    
    import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
    import org.bouncycastle.crypto.params.ECDomainParameters;
    import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
    import org.bouncycastle.math.ec.ECCurve;
    import org.bouncycastle.math.ec.ECFieldElement;
    import org.bouncycastle.math.ec.ECPoint;
    import org.bouncycastle.math.ec.ECFieldElement.Fp;
    
    public class SM2 
    {
    	//測试參数
    //	public static final String[] ecc_param = {
    //	    "8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3", 
    //	    "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498", 
    //	    "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A", 
    //	    "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7", 
    //	    "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D", 
    //	    "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2" 
    //	};
    	
    	//正式參数
    	public static String[] ecc_param = { 
    		"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",
    		"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",
    		"28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",
    		"FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",
    		"32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",
    		"BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0"
    	};
    
    	public static SM2 Instance() 
    	{
    		return new SM2();
    	}
    
    	public final BigInteger ecc_p;
    	public final BigInteger ecc_a;
    	public final BigInteger ecc_b;
    	public final BigInteger ecc_n;
    	public final BigInteger ecc_gx;
    	public final BigInteger ecc_gy;
    	public final ECCurve ecc_curve;
    	public final ECPoint ecc_point_g;
    	public final ECDomainParameters ecc_bc_spec;
    	public final ECKeyPairGenerator ecc_key_pair_generator;
    	public final ECFieldElement ecc_gx_fieldelement;
    	public final ECFieldElement ecc_gy_fieldelement;
    
    	public SM2() 
    	{
    		this.ecc_p = new BigInteger(ecc_param[0], 16);
    		this.ecc_a = new BigInteger(ecc_param[1], 16);
    		this.ecc_b = new BigInteger(ecc_param[2], 16);
    		this.ecc_n = new BigInteger(ecc_param[3], 16);
    		this.ecc_gx = new BigInteger(ecc_param[4], 16);
    		this.ecc_gy = new BigInteger(ecc_param[5], 16);
    
    		this.ecc_gx_fieldelement = new Fp(this.ecc_p, this.ecc_gx);
    		this.ecc_gy_fieldelement = new Fp(this.ecc_p, this.ecc_gy);
    
    		this.ecc_curve = new ECCurve.Fp(this.ecc_p, this.ecc_a, this.ecc_b);
    		this.ecc_point_g = new ECPoint.Fp(this.ecc_curve, this.ecc_gx_fieldelement, this.ecc_gy_fieldelement);
    
    		this.ecc_bc_spec = new ECDomainParameters(this.ecc_curve, this.ecc_point_g, this.ecc_n);
    
    		ECKeyGenerationParameters ecc_ecgenparam;
    		ecc_ecgenparam = new ECKeyGenerationParameters(this.ecc_bc_spec, new SecureRandom());
    
    		this.ecc_key_pair_generator = new ECKeyPairGenerator();
    		this.ecc_key_pair_generator.init(ecc_ecgenparam);
    	}
    }
    

    b.      SM2工具类

    【SM2Utils.java】

    package com.mlq.sm;
    
    import java.io.IOException;
    import java.math.BigInteger;
    import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
    import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
    import org.bouncycastle.crypto.params.ECPublicKeyParameters;
    import org.bouncycastle.math.ec.ECPoint;
    
    public class SM2Utils 
    {
    	//生成随机秘钥对
    	public static void generateKeyPair(){
    		SM2 sm2 = SM2.Instance();
    		AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();
    		ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
    		ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
    		BigInteger privateKey = ecpriv.getD();
    		ECPoint publicKey = ecpub.getQ();
    		
    		System.out.println("公钥: " + Util.byteToHex(publicKey.getEncoded()));
    		System.out.println("私钥: " + Util.byteToHex(privateKey.toByteArray()));
    	}
    	
    	//数据加密
    	public static String encrypt(byte[] publicKey, byte[] data) throws IOException
    	{
    		if (publicKey == null || publicKey.length == 0)
    		{
    			return null;
    		}
    		
    		if (data == null || data.length == 0)
    		{
    			return null;
    		}
    		
    		byte[] source = new byte[data.length];
    		System.arraycopy(data, 0, source, 0, data.length);
    		
    		Cipher cipher = new Cipher();
    		SM2 sm2 = SM2.Instance();
    		ECPoint userKey = sm2.ecc_curve.decodePoint(publicKey);
    		
    		ECPoint c1 = cipher.Init_enc(sm2, userKey);
    		cipher.Encrypt(source);
    		byte[] c3 = new byte[32];
    		cipher.Dofinal(c3);
    		
    //		System.out.println("C1 " + Util.byteToHex(c1.getEncoded()));
    //		System.out.println("C2 " + Util.byteToHex(source));
    //		System.out.println("C3 " + Util.byteToHex(c3));
    		//C1 C2 C3拼装成加密字串
    		return Util.byteToHex(c1.getEncoded()) + Util.byteToHex(source) + Util.byteToHex(c3);
    		
    	}
    	
    	//数据解密
    	public static byte[] decrypt(byte[] privateKey, byte[] encryptedData) throws IOException
    	{
    		if (privateKey == null || privateKey.length == 0)
    		{
    			return null;
    		}
    		
    		if (encryptedData == null || encryptedData.length == 0)
    		{
    			return null;
    		}
    		//加密字节数组转换为十六进制的字符串 长度变为encryptedData.length * 2
    		String data = Util.byteToHex(encryptedData);
    		/***分解加密字串
    		 * (C1 = C1标志位2位 + C1实体部分128位 = 130)
    		 * (C3 = C3实体部分64位  = 64)
    		 * (C2 = encryptedData.length * 2 - C1长度  - C2长度)
    		 */
    		byte[] c1Bytes = Util.hexToByte(data.substring(0,130));
    		int c2Len = encryptedData.length - 97;
    		byte[] c2 = Util.hexToByte(data.substring(130,130 + 2 * c2Len));
    		byte[] c3 = Util.hexToByte(data.substring(130 + 2 * c2Len,194 + 2 * c2Len));
    		
    		SM2 sm2 = SM2.Instance();
    		BigInteger userD = new BigInteger(1, privateKey);
    		
    		//通过C1实体字节来生成ECPoint
    		ECPoint c1 = sm2.ecc_curve.decodePoint(c1Bytes);
    		Cipher cipher = new Cipher();
    		cipher.Init_dec(userD, c1);
    		cipher.Decrypt(c2);
    		cipher.Dofinal(c3);
    		
    		//返回解密结果
    		return c2;
    	}
    	
    	public static void main(String[] args) throws Exception 
    	{
    		//生成密钥对
    		generateKeyPair();
    		
    		String plainText = "ererfeiisgod";
    		byte[] sourceData = plainText.getBytes();
    		
    		//以下的秘钥能够使用generateKeyPair()生成的秘钥内容
    		// 国密规范正式私钥
    		String prik = "3690655E33D5EA3D9A4AE1A1ADD766FDEA045CDEAA43A9206FB8C430CEFE0D94";
    		// 国密规范正式公钥
    		String pubk = "04F6E0C3345AE42B51E06BF50B98834988D54EBC7460FE135A48171BC0629EAE205EEDE253A530608178A98F1E19BB737302813BA39ED3FA3C51639D7A20C7391A";
    		
    		System.out.println("加密: ");
    		String cipherText = SM2Utils.encrypt(Util.hexToByte(pubk), sourceData);
    		System.out.println(cipherText);
    		System.out.println("解密: ");
    		plainText = new String(SM2Utils.decrypt(Util.hexToByte(prik), Util.hexToByte(cipherText)));
    		System.out.println(plainText);
    		
    	}
    }
    

    c.      SM3主类

    【SM3.java】

    package com.mlq.sm;
    
    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;
    	}
    }
    

    d.      SM3工具类

    【SM3Digest.java】

    package com.mlq.sm;
    
    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());
    	}
    }
    

    e.      工具类

    【Util.java】

    package com.mlq.sm;
    
    import java.math.BigInteger;
    
    public 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);
    	}
    	
    	/**
    	 * 依据字节数组获得值(十六进制数字)
    	 * 
    	 * @param bytes
    	 * @return
    	 */
    	public static String getHexString(byte[] bytes) 
    	{
    		return getHexString(bytes, true);
    	}
    	
    	/**
    	 * 依据字节数组获得值(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 <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 <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 假设源十六进制字符数组是一个奇怪的长度,将抛出执行时异常 */ 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,抛出执行时异常 */ 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 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相应的字符) * * @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 相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 须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 假设出现异常,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 假设出现异常,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[] 须要转换的字节数组 * @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; } }

    f.     Chiper类

    package com.mlq.sm;
    
    import java.math.BigInteger;
    import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
    import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
    import org.bouncycastle.crypto.params.ECPublicKeyParameters;
    import org.bouncycastle.math.ec.ECPoint;
    
    public class Cipher 
    {
    	private int ct;
    	private ECPoint p2;
    	private SM3Digest sm3keybase;
    	private SM3Digest sm3c3;
    	private byte key[];
    	private byte keyOff;
    
    	public Cipher() 
    	{
    		this.ct = 1;
    		this.key = new byte[32];
    		this.keyOff = 0;
    	}
    
    	private void Reset() 
    	{
    		this.sm3keybase = new SM3Digest();
    		this.sm3c3 = new SM3Digest();
    		
    		byte p[] = Util.byteConvert32Bytes(p2.getX().toBigInteger());
    		this.sm3keybase.update(p, 0, p.length);
    		this.sm3c3.update(p, 0, p.length);
    		
    		p = Util.byteConvert32Bytes(p2.getY().toBigInteger());
    		this.sm3keybase.update(p, 0, p.length);
    		this.ct = 1;
    		NextKey();
    	}
    
    	private void NextKey() 
    	{
    		SM3Digest sm3keycur = new SM3Digest(this.sm3keybase);
    		sm3keycur.update((byte) (ct >> 24 & 0xff));
    		sm3keycur.update((byte) (ct >> 16 & 0xff));
    		sm3keycur.update((byte) (ct >> 8 & 0xff));
    		sm3keycur.update((byte) (ct & 0xff));
    		sm3keycur.doFinal(key, 0);
    		this.keyOff = 0;
    		this.ct++;
    	}
    
    	public ECPoint Init_enc(SM2 sm2, ECPoint userKey) 
    	{
    		AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();
    		ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
    		ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
    		BigInteger k = ecpriv.getD();
    		ECPoint c1 = ecpub.getQ();
    		this.p2 = userKey.multiply(k);
    		Reset();
    		return c1;
    	}
    
    	public void Encrypt(byte data[]) 
    	{
    		this.sm3c3.update(data, 0, data.length);
    		for (int i = 0; i < data.length; i++) 
    		{
    			if (keyOff == key.length)
    			{
    				NextKey();
    			}
    			data[i] ^= key[keyOff++];
    		}
    	}
    
    	public void Init_dec(BigInteger userD, ECPoint c1)
    	{
    		this.p2 = c1.multiply(userD);
    		Reset();
    	}
    
    	public void Decrypt(byte data[]) 
    	{
    		for (int i = 0; i < data.length; i++)
    		{
    			if (keyOff == key.length)
    			{
    				NextKey();
    			}
    			data[i] ^= key[keyOff++];
    		}
    
    		this.sm3c3.update(data, 0, data.length);
    	}
    
    	public void Dofinal(byte c3[]) 
    	{
    		byte p[] = Util.byteConvert32Bytes(p2.getY().toBigInteger());
    		this.sm3c3.update(p, 0, p.length);
    		this.sm3c3.doFinal(c3, 0);
    		Reset();
    	}
    }

    2.SM4

    直接上代码:

    a.      SM4主类

    【SM4.java】

    package com.mlq.sm;
    
    import java.io.ByteArrayInputStream;
    import java.io.ByteArrayOutputStream;
    
    public class SM4 
    {
    	public static final int SM4_ENCRYPT = 1;
    	
    	public static final int SM4_DECRYPT = 0;
    
    	private long GET_ULONG_BE(byte[] b, int i) 
    	{
    		long n = (long)(b[i] & 0xff) << 24 | (long)((b[i + 1] & 0xff) << 16) | (long)((b[i + 2] & 0xff) << 8) | (long)(b[i + 3] & 0xff) & 0xffffffffL;
    		return n;
    	}
    
    	private void PUT_ULONG_BE(long n, byte[] b, int i) 
    	{
    		b[i] = (byte)(int)(0xFF & n >> 24);
            b[i + 1] = (byte)(int)(0xFF & n >> 16);
            b[i + 2] = (byte)(int)(0xFF & n >> 8);
            b[i + 3] = (byte)(int)(0xFF & n);
    	}
    
    	private long SHL(long x, int n) 
    	{
    		return (x & 0xFFFFFFFF) << n;
    	}
    	
    	private long ROTL(long x, int n) 
    	{
    		return SHL(x, n) | x >> (32 - n);
    	}
    	
    	private void SWAP(long[] sk, int i)
    	{
    		long t = sk[i];
    		sk[i] = sk[(31 - i)];
    		sk[(31 - i)] = t;
    	}
    	
    	public static final byte[] SboxTable = { (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 };
    	
    	public static final int[] FK = { 0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc };
    	
    	public static final 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 byte sm4Sbox(byte inch)
    	{
    		int i = inch & 0xFF;
    		byte retVal = SboxTable[i];
    		return retVal;
    	}
    
    	private long sm4Lt(long ka) 
    	{
    		long bb = 0L;
    		long c = 0L;
    		byte[] a = new byte[4];
    		byte[] b = new byte[4];
    		PUT_ULONG_BE(ka, a, 0);
    		b[0] = sm4Sbox(a[0]);
    		b[1] = sm4Sbox(a[1]);
    		b[2] = sm4Sbox(a[2]);
    		b[3] = sm4Sbox(a[3]);
    		bb = GET_ULONG_BE(b, 0);
    		c = bb ^ ROTL(bb, 2) ^ ROTL(bb, 10) ^ ROTL(bb, 18) ^ ROTL(bb, 24);
    		return c;
    	}
    
    	private long sm4F(long x0, long x1, long x2, long x3, long rk)
    	{
    		return x0 ^ sm4Lt(x1 ^ x2 ^ x3 ^ rk);
    	}
    
    	private long sm4CalciRK(long ka) 
    	{
    		long bb = 0L;
    		long rk = 0L;
    		byte[] a = new byte[4];
    		byte[] b = new byte[4];
    		PUT_ULONG_BE(ka, a, 0);
    		b[0] = sm4Sbox(a[0]);
    		b[1] = sm4Sbox(a[1]);
    		b[2] = sm4Sbox(a[2]);
    		b[3] = sm4Sbox(a[3]);
    		bb = GET_ULONG_BE(b, 0);
    		rk = bb ^ ROTL(bb, 13) ^ ROTL(bb, 23);
    		return rk;
    	}
    
    	private void sm4_setkey(long[] SK, byte[] key) 
    	{
    		long[] MK = new long[4];
    		long[] k = new long[36];
    		int i = 0;
    		MK[0] = GET_ULONG_BE(key, 0);
    		MK[1] = GET_ULONG_BE(key, 4);
    		MK[2] = GET_ULONG_BE(key, 8);
    		MK[3] = GET_ULONG_BE(key, 12);
    		k[0] = MK[0] ^ (long) FK[0];
    		k[1] = MK[1] ^ (long) FK[1];
    		k[2] = MK[2] ^ (long) FK[2];
    		k[3] = MK[3] ^ (long) FK[3];
    		for (; i < 32; i++) 
    		{
    			k[(i + 4)] = (k[i] ^ sm4CalciRK(k[(i + 1)] ^ k[(i + 2)] ^ k[(i + 3)] ^ (long) CK[i]));
    			SK[i] = k[(i + 4)];
    		}
    	}
    
    	private void sm4_one_round(long[] sk, byte[] input, byte[] output) 
    	{
    		int i = 0;
    		long[] ulbuf = new long[36];
    		ulbuf[0] = GET_ULONG_BE(input, 0);
    		ulbuf[1] = GET_ULONG_BE(input, 4);
    		ulbuf[2] = GET_ULONG_BE(input, 8);
    		ulbuf[3] = GET_ULONG_BE(input, 12);
    		while (i < 32)
    		{
    			ulbuf[(i + 4)] = sm4F(ulbuf[i], ulbuf[(i + 1)], ulbuf[(i + 2)], ulbuf[(i + 3)], sk[i]);
    			i++;
    		}
    		PUT_ULONG_BE(ulbuf[35], output, 0);
    		PUT_ULONG_BE(ulbuf[34], output, 4);
    		PUT_ULONG_BE(ulbuf[33], output, 8);
    		PUT_ULONG_BE(ulbuf[32], output, 12);
    	}
    
    	private byte[] padding(byte[] input, int mode)
    	{
    		if (input == null) 
    		{
    			return null;
    		}
    		
    		byte[] ret = (byte[]) null;
    		if (mode == SM4_ENCRYPT) 
    		{
    			int p = 16 - input.length % 16;
    			ret = new byte[input.length + p];
    			System.arraycopy(input, 0, ret, 0, input.length);
    			for (int i = 0; i < p; i++) 
    			{
    				ret[input.length + i] = (byte) p;
    			}
    		} 
    		else 
    		{
    			int p = input[input.length - 1];
    			ret = new byte[input.length - p];
    			System.arraycopy(input, 0, ret, 0, input.length - p);
    		}
    		return ret;
    	}
    
    	public void sm4_setkey_enc(SM4_Context ctx, byte[] key) throws Exception
    	{
    		if (ctx == null) 
    		{
    			throw new Exception("ctx is null!");
    		}
    		
    		if (key == null || key.length != 16) 
    		{
    			throw new Exception("key error!");
    		}
    		
    		ctx.mode = SM4_ENCRYPT;
    		sm4_setkey(ctx.sk, key);
    	}
    
    	public void sm4_setkey_dec(SM4_Context ctx, byte[] key) throws Exception
    	{
    		if (ctx == null) 
    		{
    			throw new Exception("ctx is null!");
    		}
    		
    		if (key == null || key.length != 16) 
    		{
    			throw new Exception("key error!");
    		}
    		
    		int i = 0;
    		ctx.mode = SM4_DECRYPT;
    		sm4_setkey(ctx.sk, key);
    		for (i = 0; i < 16; i++) 
    		{
    			SWAP(ctx.sk, i);
    		}
    	}
    
    	public byte[] sm4_crypt_ecb(SM4_Context ctx, byte[] input) throws Exception 
    	{
    		if (input == null) 
    		{
    			throw new Exception("input is null!");
    		}
    	
    		if ((ctx.isPadding) && (ctx.mode == SM4_ENCRYPT)) 
    		{
    			input = padding(input, SM4_ENCRYPT);
    		}
    		
    		int length = input.length;
    		ByteArrayInputStream bins = new ByteArrayInputStream(input);
    		ByteArrayOutputStream bous = new ByteArrayOutputStream();
    		for(; length > 0; length -= 16)
    		{
    			byte[] in = new byte[16];
    			byte[] out = new byte[16];
    			bins.read(in);
    			sm4_one_round(ctx.sk, in, out);
    			bous.write(out);
    		}
    		
    		byte[] output = bous.toByteArray();
    		if (ctx.isPadding && ctx.mode == SM4_DECRYPT) 
    		{
    			output = padding(output, SM4_DECRYPT);
    		}
    		bins.close();
    		bous.close();
    		return output;
    	}
    
    	public byte[] sm4_crypt_cbc(SM4_Context ctx, byte[] iv, byte[] input) throws Exception
    	{
    		if (iv == null || iv.length != 16)
    		{
    			throw new Exception("iv error!");
    		}
    		
    		if (input == null) 
    		{
    			throw new Exception("input is null!");
    		}
    		
    		if (ctx.isPadding && ctx.mode == SM4_ENCRYPT) 
    		{
    			input = padding(input, SM4_ENCRYPT);
    		}
    		
    		int i = 0;
    		int length = input.length;
    		ByteArrayInputStream bins = new ByteArrayInputStream(input);
    		ByteArrayOutputStream bous = new ByteArrayOutputStream();
    		if (ctx.mode == SM4_ENCRYPT) 
    		{
    			for(; length > 0; length -= 16)
    			{
    				byte[] in = new byte[16];
    				byte[] out = new byte[16];
    				byte[] out1 = new byte[16];
    				
    				bins.read(in);
    				for (i = 0; i < 16; i++) 
    				{
    					out[i] = ((byte) (in[i] ^ iv[i]));
    				}
    				sm4_one_round(ctx.sk, out, out1);
    				System.arraycopy(out1, 0, iv, 0, 16);
    				bous.write(out1);
    			}
    		} 
    		else 
    		{
    			byte[] temp = new byte[16];
    			for(; length > 0; length -= 16)
    			{
    				byte[] in = new byte[16];
    				byte[] out = new byte[16];
    				byte[] out1 = new byte[16];
    				
    				bins.read(in);
    				System.arraycopy(in, 0, temp, 0, 16);
    				sm4_one_round(ctx.sk, in, out);
    				for (i = 0; i < 16; i++) 
    				{
    					out1[i] = ((byte) (out[i] ^ iv[i]));
    				}
    				System.arraycopy(temp, 0, iv, 0, 16);
    				bous.write(out1);
    			}
    		}
    		
    		byte[] output = bous.toByteArray();
    		if (ctx.isPadding && ctx.mode == SM4_DECRYPT) 
    		{
    			output = padding(output, SM4_DECRYPT);
    		}
    		bins.close();
    		bous.close();
    		return output;
    	}
    }
    

    b.      SM4实体类

    【SM4_Context.java】

    package com.mlq.sm;
    
    public class SM4_Context
    {
    	public int mode;
    	
    	public long[] sk;
    	
    	public boolean isPadding;
    
    	public SM4_Context() 
    	{
    		this.mode = 1;
    		this.isPadding = true;
    		this.sk = new long[32];
    	}
    }
    

    c.      SM4工具类(这里的PaddingMode採用的是PKCS7)

    【SM4Utils.java】

    package com.mlq.sm;
    
    import java.io.IOException;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    import sun.misc.BASE64Decoder;
    import sun.misc.BASE64Encoder;
    
    public class SM4Utils
    {
    	private String secretKey = "";
    	private String iv = "";
    	private boolean hexString = false;
    	
    	public SM4Utils()
    	{
    	}
    	
    	public String encryptData_ECB(String plainText)
    	{
    		try 
    		{
    			SM4_Context ctx = new SM4_Context();
    			ctx.isPadding = true;
    			ctx.mode = SM4.SM4_ENCRYPT;
    			
    			byte[] keyBytes;
    			if (hexString)
    			{
    				keyBytes = Util.hexStringToBytes(secretKey);
    			}
    			else
    			{
    				keyBytes = secretKey.getBytes();
    			}
    			
    			SM4 sm4 = new SM4();
    			sm4.sm4_setkey_enc(ctx, keyBytes);
    			byte[] encrypted = sm4.sm4_crypt_ecb(ctx, plainText.getBytes("GBK"));
    			String cipherText = new BASE64Encoder().encode(encrypted);
    			if (cipherText != null && cipherText.trim().length() > 0)
    			{
    				Pattern p = Pattern.compile("\s*|	|
    |
    ");
    				Matcher m = p.matcher(cipherText);
    				cipherText = m.replaceAll("");
    			}
    			return cipherText;
    		} 
    		catch (Exception e) 
    		{
    			e.printStackTrace();
    			return null;
    		}
    	}
    	
    	public String decryptData_ECB(String cipherText)
    	{
    		try 
    		{
    			SM4_Context ctx = new SM4_Context();
    			ctx.isPadding = true;
    			ctx.mode = SM4.SM4_DECRYPT;
    			
    			byte[] keyBytes;
    			if (hexString)
    			{
    				keyBytes = Util.hexStringToBytes(secretKey);
    			}
    			else
    			{
    				keyBytes = secretKey.getBytes();
    			}
    			
    			SM4 sm4 = new SM4();
    			sm4.sm4_setkey_dec(ctx, keyBytes);
    			byte[] decrypted = sm4.sm4_crypt_ecb(ctx, new BASE64Decoder().decodeBuffer(cipherText));
    			return new String(decrypted, "GBK");
    		} 
    		catch (Exception e) 
    		{
    			e.printStackTrace();
    			return null;
    		}
    	}
    	
    	public String encryptData_CBC(String plainText)
    	{
    		try 
    		{
    			SM4_Context ctx = new SM4_Context();
    			ctx.isPadding = true;
    			ctx.mode = SM4.SM4_ENCRYPT;
    			
    			byte[] keyBytes;
    			byte[] ivBytes;
    			if (hexString)
    			{
    				keyBytes = Util.hexStringToBytes(secretKey);
    				ivBytes = Util.hexStringToBytes(iv);
    			}
    			else
    			{
    				keyBytes = secretKey.getBytes();
    				ivBytes = iv.getBytes();
    			}
    			
    			SM4 sm4 = new SM4();
    			sm4.sm4_setkey_enc(ctx, keyBytes);
    			byte[] encrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, plainText.getBytes("GBK"));
    			String cipherText = new BASE64Encoder().encode(encrypted);
    			if (cipherText != null && cipherText.trim().length() > 0)
    			{
    				Pattern p = Pattern.compile("\s*|	|
    |
    ");
    				Matcher m = p.matcher(cipherText);
    				cipherText = m.replaceAll("");
    			}
    			return cipherText;
    		} 
    		catch (Exception e) 
    		{
    			e.printStackTrace();
    			return null;
    		}
    	}
    	
    	public String decryptData_CBC(String cipherText)
    	{
    		try 
    		{
    			SM4_Context ctx = new SM4_Context();
    			ctx.isPadding = true;
    			ctx.mode = SM4.SM4_DECRYPT;
    			
    			byte[] keyBytes;
    			byte[] ivBytes;
    			if (hexString)
    			{
    				keyBytes = Util.hexStringToBytes(secretKey);
    				ivBytes = Util.hexStringToBytes(iv);
    			}
    			else
    			{
    				keyBytes = secretKey.getBytes();
    				ivBytes = iv.getBytes();
    			}
    			
    			SM4 sm4 = new SM4();
    			sm4.sm4_setkey_dec(ctx, keyBytes);
    			byte[] decrypted = sm4.sm4_crypt_cbc(ctx, ivBytes, new BASE64Decoder().decodeBuffer(cipherText));
    			return new String(decrypted, "GBK");
    		} 
    		catch (Exception e)
    		{
    			e.printStackTrace();
    			return null;
    		}
    	}
    	
    	public static void main(String[] args) throws IOException 
    	{
    		String plainText = "ererfeiisgod";
    		
    		SM4Utils sm4 = new SM4Utils();
    		sm4.secretKey = "JeF8U9wHFOMfs2Y8";
    		sm4.hexString = false;
    		
    		System.out.println("ECB模式");
    		String cipherText = sm4.encryptData_ECB(plainText);
    		System.out.println("密文: " + cipherText);
    		System.out.println("");
    		
    		plainText = sm4.decryptData_ECB(cipherText);
    		System.out.println("明文: " + plainText);
    		System.out.println("");
    		
    		System.out.println("CBC模式");
    		sm4.iv = "UISwD9fW6cFh9SNS";
    		cipherText = sm4.encryptData_CBC(plainText);
    		System.out.println("密文: " + cipherText);
    		System.out.println("");
    		
    		plainText = sm4.decryptData_CBC(cipherText);
    		System.out.println("明文: " + plainText);
    	}
    }
    

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  • 原文地址:https://www.cnblogs.com/yjbjingcha/p/7381059.html
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