SM2&SM3&SM4 Java实现分析

【摘要】

本文主要讲解“国密加密算法”SM系列的Java实现方法，不涉及具体的算法剖析，在网络上找到的java实现方法比较少，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。

源码下载地址http://download.youkuaiyun.com/detail/ererfei/9474502需要C#实现SM系列算法源码的可以评论留邮箱地址，看到后发送

1.SM2 & SM3

由于SM2算法中需要使用SM3摘要算法，所以把他们放在一起

项目目录结构如下：

 

首先要下载一个jar包——bcprov-jdk.jar，可以到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。实现代码如下（每个工具类都有Main可以运行测试）：

a.SM2主类

【SM2.java】

 

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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 {      //测试参数 //  public static final String[] ecc_param = { //      "8542D69E4C044F18E8B92435BF6FF7DE457283915C45517D722EDB8B08F1DFC3", //      "787968B4FA32C3FD2417842E73BBFEFF2F3C848B6831D7E0EC65228B3937E498", //      "63E4C6D3B23B0C849CF84241484BFE48F61D59A5B16BA06E6E12D1DA27C5249A", //      "8542D69E4C044F18E8B92435BF6FF7DD297720630485628D5AE74EE7C32E79B7", //      "421DEBD61B62EAB6746434EBC3CC315E32220B3BADD50BDC4C4E6C147FEDD43D", //      "0680512BCBB42C07D47349D2153B70C4E5D7FDFCBFA36EA1A85841B9E46E09A2" //  };            //正式参数      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】

 

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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();                    //下面的秘钥可以使用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】

 

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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】

 

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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】

 

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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);      }            /**       * 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 <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 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 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;      } }

 

2.SM4

直接上代码：

a.SM4主类

【SM4.java】

 

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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】

 

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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采用的是PKCS7)

【SM4Utils.java】

 

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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*|\t|\r|\n" );                  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*|\t|\r|\n" );                  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);      } }