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国密：生成SM2秘钥、加解密及加验签_sm2加密

作者：代码艺术家 | 2024-01-31 08:46:00

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sm2加密

国密改造已经持续了很长时间了，相信很多从事金融科技类的程序猿都遇到过这个需求。这篇文章就为大家带来笔者对于国密改造的一些经验，主要是代码层面，有兴趣的同学可以研究下国密的算法模型！

注：本文所用到的工具类并非笔者所写！

目录

一、国密简述

二、依赖准备

三、SM2算法应用

1、生成SM2公私钥

工具类

测试Demo

 2、数据加解密

一、国密简述

国密——国家密码局制定的国家密码算法。主要包含SM1、SM2、SM3、SM4几种方式。

SM1：对称加密，且算法不公开，使用硬件加密，本文不做叙述；

SM2：非对称加密，签名以及生成秘钥速度优于RSA，基于ECC算法，运算效率更高，且更安全；

SM3：摘要，国产杂凑算法，生成长度为256比特，优于MD5以及SHA-1算法；

SM4： 无线局域网标准的分组数据算法。对称加密，密钥长度和分组长度均为128位；

注意

生成SM2 公钥是130 位 前面多了04两个标识符，注意区分！

二、依赖准备

国密主要用到下面的包

  1.         <dependency>
  2.             <groupId>org.bouncycastle</groupId>
  3.             <artifactId>bcpkix-jdk15on</artifactId>
  4.             <version>1.57</version>
  5.         </dependency>

一定注意版本。实际项目中笔者发现项目其他子工程用到1.56版本的包，所以选择了低版本。

三、SM2算法应用

1、生成SM2公私钥

工具类

  1. package cn.test.encrypt.utils.sm2;
  2.  
  3. import cn.test.encrypt.utils.Util;
  4. import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
  5. import org.bouncycastle.crypto.digests.SM3Digest;
  6. import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
  7. import org.bouncycastle.crypto.params.ECPublicKeyParameters;
  8. import org.bouncycastle.math.ec.ECPoint;
  9.  
  10. import java.math.BigInteger;
  11.  
  12. public class Cipher {
  13.     private int ct;
  14.     private ECPoint p2;
  15.     private SM3Digest sm3keybase;
  16.     private SM3Digest sm3c3;
  17.     private byte key[];
  18.     private byte keyOff;
  19.  
  20.     public Cipher()
  21.     {
  22.         this.ct = 1;
  23.         this.key = new byte[32];
  24.         this.keyOff = 0;
  25.     }
  26.  
  27.     private void Reset()
  28.     {
  29.         this.sm3keybase = new SM3Digest();
  30.         this.sm3c3 = new SM3Digest();
  31.  
  32.         byte p[] = Util.byteConvert32Bytes(p2.getX().toBigInteger());
  33.         this.sm3keybase.update(p, 0, p.length);
  34.         this.sm3c3.update(p, 0, p.length);
  35.  
  36.         p = Util.byteConvert32Bytes(p2.getY().toBigInteger());
  37.         this.sm3keybase.update(p, 0, p.length);
  38.         this.ct = 1;
  39.         NextKey();
  40.     }
  41.  
  42.     private void NextKey()
  43.     {
  44.         SM3Digest sm3keycur = new SM3Digest(this.sm3keybase);
  45.         sm3keycur.update((byte) (ct >> 24 & 0xff));
  46.         sm3keycur.update((byte) (ct >> 16 & 0xff));
  47.         sm3keycur.update((byte) (ct >> 8 & 0xff));
  48.         sm3keycur.update((byte) (ct & 0xff));
  49.         sm3keycur.doFinal(key, 0);
  50.         this.keyOff = 0;
  51.         this.ct++;
  52.     }
  53.  
  54.     public ECPoint Init_enc(SM2 sm2, ECPoint userKey)
  55.     {
  56.         AsymmetricCipherKeyPair key = sm2.ecc_key_pair_generator.generateKeyPair();
  57.         ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
  58.         ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
  59.         BigInteger k = ecpriv.getD();
  60.         ECPoint c1 = ecpub.getQ();
  61.         this.p2 = userKey.multiply(k);
  62.         Reset();
  63.         return c1;
  64.     }
  65.  
  66.     public void Encrypt(byte data[])
  67.     {
  68.         this.sm3c3.update(data, 0, data.length);
  69.         for (int i = 0; i < data.length; i++)
  70.         {
  71.             if (keyOff == key.length)
  72.             {
  73.                 NextKey();
  74.             }
  75.             data[i] ^= key[keyOff++];
  76.         }
  77.     }
  78.  
  79.     public void Init_dec(BigInteger userD, ECPoint c1)
  80.     {
  81.         this.p2 = c1.multiply(userD);
  82.         Reset();
  83.     }
  84.  
  85.     public void Decrypt(byte data[])
  86.     {
  87.         for (int i = 0; i < data.length; i++)
  88.         {
  89.             if (keyOff == key.length)
  90.             {
  91.                 NextKey();
  92.             }
  93.             data[i] ^= key[keyOff++];
  94.         }
  95.  
  96.         this.sm3c3.update(data, 0, data.length);
  97.     }
  98.  
  99.     public void Dofinal(byte c3[])
  100.     {
  101.         byte p[] = Util.byteConvert32Bytes(p2.getY().toBigInteger());
  102.         this.sm3c3.update(p, 0, p.length);
  103.         this.sm3c3.doFinal(c3, 0);
  104.         Reset();
  105.     }
  106. }
  1. package cn.test.encrypt.utils.sm2;
  2.  
  3.  
  4. import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
  5. import org.bouncycastle.crypto.params.ECDomainParameters;
  6. import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
  7. import org.bouncycastle.math.ec.ECCurve;
  8. import org.bouncycastle.math.ec.ECFieldElement;
  9. import org.bouncycastle.math.ec.ECFieldElement.Fp;
  10. import org.bouncycastle.math.ec.ECPoint;
  11.  
  12. import java.math.BigInteger;
  13. import java.security.SecureRandom;
  14.  
  15. public class SM2 {
  16.  
  17.     //国密参数
  18.     public static String[] ecc_param = {
  19.             "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF",
  20.             "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC",
  21.             "28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93",
  22.             "FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123",
  23.             "32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7",
  24.             "BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0"
  25.     };
  26.  
  27.     public static SM2 Instance()
  28.     {
  29.         return new SM2();
  30.     }
  31.  
  32.     public final BigInteger ecc_p;
  33.     public final BigInteger ecc_a;
  34.     public final BigInteger ecc_b;
  35.     public final BigInteger ecc_n;
  36.     public final BigInteger ecc_gx;
  37.     public final BigInteger ecc_gy;
  38.     public final ECCurve ecc_curve;
  39.     public final ECPoint ecc_point_g;
  40.     public final ECDomainParameters ecc_bc_spec;
  41.     public final ECKeyPairGenerator ecc_key_pair_generator;
  42.     public final ECFieldElement ecc_gx_fieldelement;
  43.     public final ECFieldElement ecc_gy_fieldelement;
  44.  
  45.     public SM2()
  46.     {
  47.         this.ecc_p = new BigInteger(ecc_param[0], 16);
  48.         this.ecc_a = new BigInteger(ecc_param[1], 16);
  49.         this.ecc_b = new BigInteger(ecc_param[2], 16);
  50.         this.ecc_n = new BigInteger(ecc_param[3], 16);
  51.         this.ecc_gx = new BigInteger(ecc_param[4], 16);
  52.         this.ecc_gy = new BigInteger(ecc_param[5], 16);
  53.  
  54.         this.ecc_gx_fieldelement = new Fp(this.ecc_p, this.ecc_gx);
  55.         this.ecc_gy_fieldelement = new Fp(this.ecc_p, this.ecc_gy);
  56.  
  57.         this.ecc_curve = new ECCurve.Fp(this.ecc_p, this.ecc_a, this.ecc_b);
  58.         this.ecc_point_g = new ECPoint.Fp(this.ecc_curve, this.ecc_gx_fieldelement, this.ecc_gy_fieldelement);
  59.  
  60.         this.ecc_bc_spec = new ECDomainParameters(this.ecc_curve, this.ecc_point_g, this.ecc_n);
  61.  
  62.         ECKeyGenerationParameters ecc_ecgenparam;
  63.         ecc_ecgenparam = new ECKeyGenerationParameters(this.ecc_bc_spec, new SecureRandom());
  64.  
  65.         this.ecc_key_pair_generator = new ECKeyPairGenerator();
  66.         this.ecc_key_pair_generator.init(ecc_ecgenparam);
  67.     }
  68. }

生成随机秘钥工具类

  1. package cn.test.encrypt.utils.sm2;
  2.  
  3.  
  4. import cn.test.encrypt.utils.Util;
  5. import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
  6. import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
  7. import org.bouncycastle.crypto.params.ECPublicKeyParameters;
  8. import org.bouncycastle.math.ec.ECPoint;
  9.  
  10. import java.io.IOException;
  11. import java.math.BigInteger;
  12.  
  13. public class SM2EncDecUtils {
  14.     //生成随机秘钥对
  15.     public static SM2KeyVO generateKeyPair(){
  16.         SM2 sm2 = SM2.Instance();
  17.         AsymmetricCipherKeyPair key = null;
  18.         while (true){
  19.             key=sm2.ecc_key_pair_generator.generateKeyPair();
  20.             if(((ECPrivateKeyParameters) key.getPrivate()).getD().toByteArray().length==32){
  21.                 break;
  22.             }
  23.         }
  24.         ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) key.getPrivate();
  25.         ECPublicKeyParameters ecpub = (ECPublicKeyParameters) key.getPublic();
  26.         BigInteger privateKey = ecpriv.getD();
  27.         ECPoint publicKey = ecpub.getQ();
  28.         SM2KeyVO sm2KeyVO = new SM2KeyVO();
  29.         sm2KeyVO.setPublicKey(publicKey);
  30.         sm2KeyVO.setPrivateKey(privateKey);
  31.         //System.out.println("公钥: " + Util.byteToHex(publicKey.getEncoded()));
  32.         //System.out.println("私钥: " + Util.byteToHex(privateKey.toByteArray()));
  33.         return sm2KeyVO;
  34.     }
  35.  
  36.     //数据加密
  37.     public static String encrypt(byte[] publicKey, byte[] data) throws IOException
  38.     {
  39.         if (publicKey == null || publicKey.length == 0)
  40.         {
  41.             return null;
  42.         }
  43.  
  44.         if (data == null || data.length == 0)
  45.         {
  46.             return null;
  47.         }
  48.  
  49.         byte[] source = new byte[data.length];
  50.         //将数组data复制到source
  51.         System.arraycopy(data, 0, source, 0, data.length);
  52.  
  53.         Cipher cipher = new Cipher();
  54.         SM2 sm2 = SM2.Instance();//new自建类,， SM2 sm2 = new SM2();
  55.         ECPoint userKey = sm2.ecc_curve.decodePoint(publicKey);
  56.  
  57.         ECPoint c1 = cipher.Init_enc(sm2, userKey);
  58.         cipher.Encrypt(source);
  59.         byte[] c3 = new byte[32];
  60.         cipher.Dofinal(c3);
  61.  
  62.      // System.out.println("C1 " + Util.byteToHex(c1.getEncoded()));
  63.      // System.out.println("C2 " + Util.byteToHex(source));
  64.      //System.out.println("C3 " + Util.byteToHex(c3));
  65.         //C1 C2 C3拼装成加密字串
  66.         // C1 | C2 | C3
  67.         //return Util.byteToHex(c1.getEncoded()) + Util.byteToHex(source) + Util.byteToHex(c3);
  68.         // C1 | C3 | C2
  69.         return Util.byteToHex(c1.getEncoded()) + Util.byteToHex(c3) + Util.byteToHex(source);
  70.     }
  71.  
  72.     //数据解密
  73.     public static byte[] decrypt(byte[] privateKey, byte[] encryptedData) throws IOException
  74.     {
  75.         if (privateKey == null || privateKey.length == 0)
  76.         {
  77.             return null;
  78.         }
  79.  
  80.         if (encryptedData == null || encryptedData.length == 0)
  81.         {
  82.             return null;
  83.         }
  84.         //加密字节数组转换为十六进制的字符串 长度变为encryptedData.length * 2
  85.         String data = Util.byteToHex(encryptedData);
  86.         /***分解加密字串 C1 | C2 | C3
  87.          * （C1 = C1标志位2位 + C1实体部分128位 = 130）
  88.          * （C3 = C3实体部分64位  = 64）
  89.          * （C2 = encryptedData.length * 2 - C1长度  - C2长度）
  91.         byte[] c1Bytes = Util.hexToByte(data.substring(0,130));
  92.         int c2Len = encryptedData.length - 97;
  93.         byte[] c2 = Util.hexToByte(data.substring(130,130 + 2 * c2Len));
  94.         byte[] c3 = Util.hexToByte(data.substring(130 + 2 * c2Len,194 + 2 * c2Len));
  95.         */
  96.         /***分解加密字串 C1 | C3 | C2
  97.          * （C1 = C1标志位2位 + C1实体部分128位 = 130）
  98.          * （C3 = C3实体部分64位  = 64）
  99.          * （C2 = encryptedData.length * 2 - C1长度  - C2长度）
  100.          */
  101.         byte[] c1Bytes = Util.hexToByte(data.substring(0,130));
  102.         int c2Len = encryptedData.length - 97;
  103.         byte[] c3 = Util.hexToByte(data.substring(130,130 + 64));
  104.         byte[] c2 = Util.hexToByte(data.substring(194,194 + 2 * c2Len));
  105.  
  106.         SM2 sm2 = SM2.Instance();
  107.         BigInteger userD = new BigInteger(1, privateKey);
  108.  
  109.         //通过C1实体字节来生成ECPoint
  110.         ECPoint c1 = sm2.ecc_curve.decodePoint(c1Bytes);
  111.         Cipher cipher = new Cipher();
  112.         cipher.Init_dec(userD, c1);
  113.         cipher.Decrypt(c2);
  114.         cipher.Dofinal(c3);
  115.  
  116.         //返回解密结果
  117.         return c2;
  118.     }
  119.  
  120. }

SM2曲线算法工具类

  1. package cn.test.encrypt.utils.sm2;
  2.  
  3. import cn.test.encrypt.utils.Util;
  4. import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
  5. import org.bouncycastle.crypto.digests.SM3Digest;
  6. import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
  7. import org.bouncycastle.crypto.params.ECDomainParameters;
  8. import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
  9. import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
  10. import org.bouncycastle.crypto.params.ECPublicKeyParameters;
  11. import org.bouncycastle.math.ec.ECCurve;
  12. import org.bouncycastle.math.ec.ECFieldElement;
  13. import org.bouncycastle.math.ec.ECFieldElement.Fp;
  14. import org.bouncycastle.math.ec.ECPoint;
  15.  
  16. import java.math.BigInteger;
  17. import java.security.SecureRandom;
  18.  
  19.  
  20. public class SM2Factory {
  21. 	/*-----------------------国密算法相关参数begin-----------
  22. 	 * ------------------*/
  23. 	//A 第一系数
  24. 	private static final BigInteger a  = new BigInteger("fffffffeffffffffffffffffffffffffffffffff00000000fffffffffffffffc",16);
  25. 	//B 第二系数
  26. 	private static final BigInteger b  = new BigInteger("28e9fa9e9d9f5e344d5a9e4bcf6509a7f39789f515ab8f92ddbcbd414d940e93",16);
  27. 	//曲线X系数
  28. 	private static final BigInteger gx = new BigInteger("32c4ae2c1f1981195f9904466a39c9948fe30bbff2660be1715a4589334c74c7",16);
  29. 	//曲线Y系数
  30. 	private static final BigInteger gy = new BigInteger("bc3736a2f4f6779c59bdcee36b692153d0a9877cc62a474002df32e52139f0a0",16);
  31. 	//生产者顺序系数
  32. 	private static final BigInteger n  = new BigInteger("fffffffeffffffffffffffffffffffff7203df6b21c6052b53bbf40939d54123",16);
  33. 	//素数
  34. 	private static final BigInteger p  = new BigInteger("fffffffeffffffffffffffffffffffffffffffff00000000ffffffffffffffff",16);
  35. 	//因子系数 1
  36. 	private static final int h  = 1;
  37. 	/*-----------------------国密算法相关参数end-----------------------------*/
  38. 	//一些必要类
  39. 	public final ECFieldElement ecc_gx_fieldelement;
  40. 	public final ECFieldElement ecc_gy_fieldelement;
  41. 	public final ECCurve ecc_curve;
  42. 	public final ECPoint ecc_point_g;
  43. 	public final ECDomainParameters ecc_bc_spec;
  44. 	public final ECKeyPairGenerator ecc_key_pair_generator;
  45. 	/**
  46. 	 * 初始化方法
  47. 	 * @return
  48. 	 */
  49. 	public static SM2Factory getInstance(){
  50. 		return new SM2Factory();
  51. 	}
  52. 	public SM2Factory() {
  53.  
  54. 		this.ecc_gx_fieldelement = new Fp(this.p,this.gx);
  55. 		this.ecc_gy_fieldelement = new Fp(this.p, this.gy);
  56.  
  57. 		this.ecc_curve = new ECCurve.Fp(this.p, this.a, this.b);
  58.  
  59. 		this.ecc_point_g = new ECPoint.Fp(this.ecc_curve, this.ecc_gx_fieldelement,this.ecc_gy_fieldelement);
  60. 		this.ecc_bc_spec = new ECDomainParameters(this.ecc_curve, this.ecc_point_g, this.n);
  61.  
  62. 		ECKeyGenerationParameters ecc_ecgenparam;
  63. 		ecc_ecgenparam = new ECKeyGenerationParameters(this.ecc_bc_spec, new SecureRandom());
  64.  
  65. 		this.ecc_key_pair_generator = new ECKeyPairGenerator();
  66. 		this.ecc_key_pair_generator.init(ecc_ecgenparam);
  67. 	}
  68. 	/**
  69. 	 * 根据私钥、曲线参数计算Z
  70. 	 * @param userId
  71. 	 * @param userKey
  72. 	 * @return
  73. 	 */
  74. 	public  byte[] sm2GetZ(byte[] userId, ECPoint userKey){
  75. 		SM3Digest sm3 = new SM3Digest();
  76.  
  77. 		int len = userId.length * 8;
  78. 		sm3.update((byte) (len >> 8 & 0xFF));
  79. 		sm3.update((byte) (len & 0xFF));
  80. 		sm3.update(userId, 0, userId.length);
  81.  
  82. 		byte[] p = Util.byteConvert32Bytes(this.a);
  83. 		sm3.update(p, 0, p.length);
  84.  
  85. 		p = Util.byteConvert32Bytes(this.b);
  86. 		sm3.update(p, 0, p.length);
  87.  
  88. 		p = Util.byteConvert32Bytes(this.gx);
  89. 		sm3.update(p, 0, p.length);
  90.  
  91. 		p = Util.byteConvert32Bytes(this.gy);
  92. 		sm3.update(p, 0, p.length);
  93.  
  94. 		p = Util.byteConvert32Bytes(userKey.normalize().getXCoord().toBigInteger());
  95. 		sm3.update(p, 0, p.length);
  96.  
  97. 		p = Util.byteConvert32Bytes(userKey.normalize().getYCoord().toBigInteger());
  98. 		sm3.update(p, 0, p.length);
  99.  
  100. 		byte[] md = new byte[sm3.getDigestSize()];
  101. 		sm3.doFinal(md, 0);
  102. 		return md;
  103. 	}
  104. 	/**
  105. 	 * 签名相关值计算
  106. 	 * @param md
  107. 	 * @param userD
  108. 	 * @param userKey
  109. 	 * @param sm2Result
  110. 	 */
  111. 	public void sm2Sign(byte[] md, BigInteger userD, ECPoint userKey, SM2Result sm2Result) {
  112. 		BigInteger e = new BigInteger(1, md);
  113. 		BigInteger k = null;
  114. 		ECPoint kp = null;
  115. 		BigInteger r = null;
  116. 		BigInteger s = null;
  117. 		do {
  118. 			do {
  119. 				// 正式环境
  120. 				AsymmetricCipherKeyPair keypair = ecc_key_pair_generator.generateKeyPair();
  121. 				ECPrivateKeyParameters ecpriv = (ECPrivateKeyParameters) keypair.getPrivate();
  122. 				ECPublicKeyParameters ecpub = (ECPublicKeyParameters) keypair.getPublic();
  123. 				k = ecpriv.getD();
  124. 				kp = ecpub.getQ();
  125. 				//System.out.println("BigInteger:" + k + "\nECPoint:" + kp);
  126.  
  127. 				//System.out.println("计算曲线点X1: "+ kp.getXCoord().toBigInteger().toString(16));
  128. 				//System.out.println("计算曲线点Y1: "+ kp.getYCoord().toBigInteger().toString(16));
  129. 				//System.out.println("");
  130. 				// r
  131. 				r = e.add(kp.getXCoord().toBigInteger());
  132. 				r = r.mod(this.n);
  133. 			} while (r.equals(BigInteger.ZERO) || r.add(k).equals(this.n)||r.toString(16).length()!=64);
  134.  
  135. 			// (1 + dA)~-1
  136. 			BigInteger da_1 = userD.add(BigInteger.ONE);
  137. 			da_1 = da_1.modInverse(this.n);
  138. 			// s
  139. 			s = r.multiply(userD);
  140. 			s = k.subtract(s).mod(this.n);
  141. 			s = da_1.multiply(s).mod(this.n);
  142. 		} while (s.equals(BigInteger.ZERO)||(s.toString(16).length()!=64));
  143.  
  144. 		sm2Result.r = r;
  145. 		sm2Result.s = s;
  146. 	}
  147. 	/**
  148. 	 * 验签
  149. 	 * @param md sm3摘要
  150. 	 * @param userKey 根据公钥decode一个ecpoint对象
  151. 	 * @param r 没有特殊含义
  152. 	 * @param s 没有特殊含义
  153. 	 * @param sm2Result 接收参数的对象
  154. 	 */
  155. 	public void sm2Verify(byte md[], ECPoint userKey, BigInteger r,
  156.                           BigInteger s, SM2Result sm2Result) {
  157. 		sm2Result.R = null;
  158. 		BigInteger e = new BigInteger(1, md);
  159. 		BigInteger t = r.add(s).mod(this.n);
  160. 		if (t.equals(BigInteger.ZERO)) {
  161. 			return;
  162. 		} else {
  163. 			ECPoint x1y1 = ecc_point_g.multiply(sm2Result.s);
  164. 			//System.out.println("计算曲线点X0: "+ x1y1.normalize().getXCoord().toBigInteger().toString(16));
  165. 			//System.out.println("计算曲线点Y0: "+ x1y1.normalize().getYCoord().toBigInteger().toString(16));
  166. 			//System.out.println("");
  167.  
  168. 			x1y1 = x1y1.add(userKey.multiply(t));
  169. 			//System.out.println("计算曲线点X1: "+ x1y1.normalize().getXCoord().toBigInteger().toString(16));
  170. 			//System.out.println("计算曲线点Y1: "+ x1y1.normalize().getYCoord().toBigInteger().toString(16));
  171. 			//System.out.println("");
  172. 			sm2Result.R = e.add(x1y1.normalize().getXCoord().toBigInteger()).mod(this.n);
  173. 			//System.out.println("R: " + sm2Result.R.toString(16));
  174. 			return;
  175. 		}
  176. 	}
  177.  
  178. }

工具类

  1. package cn.test.encrypt.utils;
  2.  
  3. import java.math.BigInteger;
  4.  
  5. public class Util {
  6.     /**
  7.      * 整形转换成网络传输的字节流（字节数组）型数据
  8.      *
  9.      * @param num 一个整型数据
  10.      * @return 4个字节的自己数组
  11.      */
  12.     public static byte[] intToBytes(int num) {
  13.         byte[] bytes = new byte[4];
  14.         bytes[0] = (byte) (0xff & (num >> 0));
  15.         bytes[1] = (byte) (0xff & (num >> 8));
  16.         bytes[2] = (byte) (0xff & (num >> 16));
  17.         bytes[3] = (byte) (0xff & (num >> 24));
  18.         return bytes;
  19.     }
  20.  
  21.     /**
  22.      * 四个字节的字节数据转换成一个整形数据
  23.      *
  24.      * @param bytes 4个字节的字节数组
  25.      * @return 一个整型数据
  26.      */
  27.     public static int byteToInt(byte[] bytes) {
  28.         int num = 0;
  29.         int temp;
  30.         temp = (0x000000ff & (bytes[0])) << 0;
  31.         num = num | temp;
  32.         temp = (0x000000ff & (bytes[1])) << 8;
  33.         num = num | temp;
  34.         temp = (0x000000ff & (bytes[2])) << 16;
  35.         num = num | temp;
  36.         temp = (0x000000ff & (bytes[3])) << 24;
  37.         num = num | temp;
  38.         return num;
  39.     }
  40.  
  41.     /**
  42.      * 长整形转换成网络传输的字节流（字节数组）型数据
  43.      *
  44.      * @param num 一个长整型数据
  45.      * @return 4个字节的自己数组
  46.      */
  47.     public static byte[] longToBytes(long num) {
  48.         byte[] bytes = new byte[8];
  49.         for (int i = 0; i < 8; i++) {
  50.             bytes[i] = (byte) (0xff & (num >> (i * 8)));
  51.         }
  52.  
  53.         return bytes;
  54.     }
  55.  
  56.     /**
  57.      * 大数字转换字节流（字节数组）型数据
  58.      *
  59.      * @param n
  60.      * @return
  61.      */
  62.     public static byte[] byteConvert32Bytes(BigInteger n) {
  63.         byte tmpd[] = (byte[]) null;
  64.         if (n == null) {
  65.             return null;
  66.         }
  67.  
  68.         if (n.toByteArray().length == 33) {
  69.             tmpd = new byte[32];
  70.             System.arraycopy(n.toByteArray(), 1, tmpd, 0, 32);
  71.         } else if (n.toByteArray().length == 32) {
  72.             tmpd = n.toByteArray();
  73.         } else {
  74.             tmpd = new byte[32];
  75.             for (int i = 0; i < 32 - n.toByteArray().length; i++) {
  76.                 tmpd[i] = 0;
  77.             }
  78.             System.arraycopy(n.toByteArray(), 0, tmpd, 32 - n.toByteArray().length, n.toByteArray().length);
  79.         }
  80.         return tmpd;
  81.     }
  82.  
  83.     /**
  84.      * 换字节流（字节数组）型数据转大数字
  85.      *
  86.      * @param b
  87.      * @return
  88.      */
  89.     public static BigInteger byteConvertInteger(byte[] b) {
  90.         if (b[0] < 0) {
  91.             byte[] temp = new byte[b.length + 1];
  92.             temp[0] = 0;
  93.             System.arraycopy(b, 0, temp, 1, b.length);
  94.             return new BigInteger(temp);
  95.         }
  96.         return new BigInteger(b);
  97.     }
  98.  
  99.     /**
  100.      * 根据字节数组获得值(十六进制数字)
  101.      *
  102.      * @param bytes
  103.      * @return
  104.      */
  105.     public static String getHexString(byte[] bytes) {
  106.         return getHexString(bytes, true);
  107.     }
  108.  
  109.     /**
  110.      * 根据字节数组获得值(十六进制数字)
  111.      *
  112.      * @param bytes
  113.      * @param upperCase
  114.      * @return
  115.      */
  116.     public static String getHexString(byte[] bytes, boolean upperCase) {
  117.         String ret = "";
  118.         for (int i = 0; i < bytes.length; i++) {
  119.             ret += Integer.toString((bytes[i] & 0xff) + 0x100, 16).substring(1);
  120.         }
  121.         return upperCase ? ret.toUpperCase() : ret;
  122.     }
  123.  
  124.     /**
  125.      * 打印十六进制字符串
  126.      *
  127.      * @param bytes
  128.      */
  129.     public static void printHexString(byte[] bytes) {
  130.         for (int i = 0; i < bytes.length; i++) {
  131.             String hex = Integer.toHexString(bytes[i] & 0xFF);
  132.             if (hex.length() == 1) {
  133.                 hex = '0' + hex;
  134.             }
  135.             System.out.print("0x" + hex.toUpperCase() + ",");
  136.         }
  137.         System.out.println("");
  138.     }
  139.  
  140.     /**
  141.      * Convert hex string to byte[]
  142.      *
  143.      * @param hexString the hex string
  144.      * @return byte[]
  145.      */
  146.     public static byte[] hexStringToBytes(String hexString) {
  147.         if (hexString == null || hexString.equals("")) {
  148.             return null;
  149.         }
  150.  
  151.         hexString = hexString.toUpperCase();
  152.         int length = hexString.length() / 2;
  153.         char[] hexChars = hexString.toCharArray();
  154.         byte[] d = new byte[length];
  155.         for (int i = 0; i < length; i++) {
  156.             int pos = i * 2;
  157.             d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
  158.         }
  159.         return d;
  160.     }
  161.  
  162.     /**
  163.      * Convert char to byte
  164.      *
  165.      * @param c char
  166.      * @return byte
  167.      */
  168.     public static byte charToByte(char c) {
  169.         return (byte) "0123456789ABCDEF".indexOf(c);
  170.     }
  171.  
  172.     /**
  173.      * 用于建立十六进制字符的输出的小写字符数组
  174.      */
  175.     private static final char[] DIGITS_LOWER = {'0', '1', '2', '3', '4', '5',
  176.             '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
  177.  
  178.     /**
  179.      * 用于建立十六进制字符的输出的大写字符数组
  180.      */
  181.     private static final char[] DIGITS_UPPER = {'0', '1', '2', '3', '4', '5',
  182.             '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
  183.  
  184.     /**
  185.      * 将字节数组转换为十六进制字符数组
  186.      *
  187.      * @param data byte[]
  188.      * @return 十六进制char[]
  189.      */
  190.     public static char[] encodeHex(byte[] data) {
  191.         return encodeHex(data, true);
  192.     }
  193.  
  194.     /**
  195.      * 将字节数组转换为十六进制字符数组
  196.      *
  197.      * @param data        byte[]
  198.      * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
  199.      * @return 十六进制char[]
  200.      */
  201.     public static char[] encodeHex(byte[] data, boolean toLowerCase) {
  202.         return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
  203.     }
  204.  
  205.     /**
  206.      * 将字节数组转换为十六进制字符数组
  207.      *
  208.      * @param data     byte[]
  209.      * @param toDigits 用于控制输出的char[]
  210.      * @return 十六进制char[]
  211.      */
  212.     protected static char[] encodeHex(byte[] data, char[] toDigits) {
  213.         int l = data.length;
  214.         char[] out = new char[l << 1];
  215.         // two characters form the hex value.
  216.         for (int i = 0, j = 0; i < l; i++) {
  217.             out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
  218.             out[j++] = toDigits[0x0F & data[i]];
  219.         }
  220.         return out;
  221.     }
  222.  
  223.     /**
  224.      * 将字节数组转换为十六进制字符串
  225.      *
  226.      * @param data byte[]
  227.      * @return 十六进制String
  228.      */
  229.     public static String encodeHexString(byte[] data) {
  230.         return encodeHexString(data, true);
  231.     }
  232.  
  233.     /**
  234.      * 将字节数组转换为十六进制字符串
  235.      *
  236.      * @param data        byte[]
  237.      * @param toLowerCase <code>true</code> 传换成小写格式 ， <code>false</code> 传换成大写格式
  238.      * @return 十六进制String
  239.      */
  240.     public static String encodeHexString(byte[] data, boolean toLowerCase) {
  241.         return encodeHexString(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
  242.     }
  243.  
  244.     /**
  245.      * 将字节数组转换为十六进制字符串
  246.      *
  247.      * @param data     byte[]
  248.      * @param toDigits 用于控制输出的char[]
  249.      * @return 十六进制String
  250.      */
  251.     protected static String encodeHexString(byte[] data, char[] toDigits) {
  252.         return new String(encodeHex(data, toDigits));
  253.     }
  254.  
  255.     /**
  256.      * 将十六进制字符数组转换为字节数组
  257.      *
  258.      * @param data 十六进制char[]
  259.      * @return byte[]
  260.      * @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
  261.      */
  262.     public static byte[] decodeHex(char[] data) {
  263.         int len = data.length;
  264.  
  265.         if ((len & 0x01) != 0) {
  266.             throw new RuntimeException("Odd number of characters.");
  267.         }
  268.  
  269.         byte[] out = new byte[len >> 1];
  270.  
  271.         // two characters form the hex value.
  272.         for (int i = 0, j = 0; j < len; i++) {
  273.             int f = toDigit(data[j], j) << 4;
  274.             j++;
  275.             f = f | toDigit(data[j], j);
  276.             j++;
  277.             out[i] = (byte) (f & 0xFF);
  278.         }
  279.  
  280.         return out;
  281.     }
  282.  
  283.     /**
  284.      * 将十六进制字符转换成一个整数
  285.      *
  286.      * @param ch    十六进制char
  287.      * @param index 十六进制字符在字符数组中的位置
  288.      * @return 一个整数
  289.      * @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
  290.      */
  291.     protected static int toDigit(char ch, int index) {
  292.         int digit = Character.digit(ch, 16);
  293.         if (digit == -1) {
  294.             throw new RuntimeException("Illegal hexadecimal character " + ch
  295.                     + " at index " + index);
  296.         }
  297.         return digit;
  298.     }
  299.  
  300.     /**
  301.      * 数字字符串转ASCII码字符串
  302.      *
  303.      * @param String 字符串
  304.      * @return ASCII字符串
  305.      */
  306.     public static String StringToAsciiString(String content) {
  307.         String result = "";
  308.         int max = content.length();
  309.         for (int i = 0; i < max; i++) {
  310.             char c = content.charAt(i);
  311.             String b = Integer.toHexString(c);
  312.             result = result + b;
  313.         }
  314.         return result;
  315.     }
  316.  
  317.     /**
  318.      * 十六进制转字符串
  319.      *
  320.      * @param hexString  十六进制字符串
  321.      * @param encodeType 编码类型4：Unicode，2：普通编码
  322.      * @return 字符串
  323.      */
  324.     public static String hexStringToString(String hexString, int encodeType) {
  325.         String result = "";
  326.         int max = hexString.length() / encodeType;
  327.         for (int i = 0; i < max; i++) {
  328.             char c = (char) hexStringToAlgorism(hexString
  329.                     .substring(i * encodeType, (i + 1) * encodeType));
  330.             result += c;
  331.         }
  332.         return result;
  333.     }
  334.  
  335.     /**
  336.      * 十六进制字符串装十进制
  337.      *
  338.      * @param hex 十六进制字符串
  339.      * @return 十进制数值
  340.      */
  341.     public static int hexStringToAlgorism(String hex) {
  342.         hex = hex.toUpperCase();
  343.         int max = hex.length();
  344.         int result = 0;
  345.         for (int i = max; i > 0; i--) {
  346.             char c = hex.charAt(i - 1);
  347.             int algorism = 0;
  348.             if (c >= '0' && c <= '9') {
  349.                 algorism = c - '0';
  350.             } else {
  351.                 algorism = c - 55;
  352.             }
  353.             result += Math.pow(16, max - i) * algorism;
  354.         }
  355.         return result;
  356.     }
  357.  
  358.     /**
  359.      * 十六转二进制
  360.      *
  361.      * @param hex 十六进制字符串
  362.      * @return 二进制字符串
  363.      */
  364.     public static String hexStringToBinary(String hex) {
  365.         hex = hex.toUpperCase();
  366.         String result = "";
  367.         int max = hex.length();
  368.         for (int i = 0; i < max; i++) {
  369.             char c = hex.charAt(i);
  370.             switch (c) {
  371.                 case '0':
  372.                     result += "0000";
  373.                     break;
  374.                 case '1':
  375.                     result += "0001";
  376.                     break;
  377.                 case '2':
  378.                     result += "0010";
  379.                     break;
  380.                 case '3':
  381.                     result += "0011";
  382.                     break;
  383.                 case '4':
  384.                     result += "0100";
  385.                     break;
  386.                 case '5':
  387.                     result += "0101";
  388.                     break;
  389.                 case '6':
  390.                     result += "0110";
  391.                     break;
  392.                 case '7':
  393.                     result += "0111";
  394.                     break;
  395.                 case '8':
  396.                     result += "1000";
  397.                     break;
  398.                 case '9':
  399.                     result += "1001";
  400.                     break;
  401.                 case 'A':
  402.                     result += "1010";
  403.                     break;
  404.                 case 'B':
  405.                     result += "1011";
  406.                     break;
  407.                 case 'C':
  408.                     result += "1100";
  409.                     break;
  410.                 case 'D':
  411.                     result += "1101";
  412.                     break;
  413.                 case 'E':
  414.                     result += "1110";
  415.                     break;
  416.                 case 'F':
  417.                     result += "1111";
  418.                     break;
  419.             }
  420.         }
  421.         return result;
  422.     }
  423.  
  424.     /**
  425.      * ASCII码字符串转数字字符串
  426.      *
  427.      * @param String ASCII字符串
  428.      * @return 字符串
  429.      */
  430.     public static String AsciiStringToString(String content) {
  431.         String result = "";
  432.         int length = content.length() / 2;
  433.         for (int i = 0; i < length; i++) {
  434.             String c = content.substring(i * 2, i * 2 + 2);
  435.             int a = hexStringToAlgorism(c);
  436.             char b = (char) a;
  437.             String d = String.valueOf(b);
  438.             result += d;
  439.         }
  440.         return result;
  441.     }
  442.  
  443.     /**
  444.      * 将十进制转换为指定长度的十六进制字符串
  445.      *
  446.      * @param algorism  int 十进制数字
  447.      * @param maxLength int 转换后的十六进制字符串长度
  448.      * @return String 转换后的十六进制字符串
  449.      */
  450.     public static String algorismToHexString(int algorism, int maxLength) {
  451.         String result = "";
  452.         result = Integer.toHexString(algorism);
  453.  
  454.         if (result.length() % 2 == 1) {
  455.             result = "0" + result;
  456.         }
  457.         return patchHexString(result.toUpperCase(), maxLength);
  458.     }
  459.  
  460.     /**
  461.      * 字节数组转为普通字符串（ASCII对应的字符）
  462.      *
  463.      * @param bytearray byte[]
  464.      * @return String
  465.      */
  466.     public static String byteToString(byte[] bytearray) {
  467.         String result = "";
  468.         char temp;
  469.  
  470.         int length = bytearray.length;
  471.         for (int i = 0; i < length; i++) {
  472.             temp = (char) bytearray[i];
  473.             result += temp;
  474.         }
  475.         return result;
  476.     }
  477.  
  478.     /**
  479.      * 二进制字符串转十进制
  480.      *
  481.      * @param binary 二进制字符串
  482.      * @return 十进制数值
  483.      */
  484.     public static int binaryToAlgorism(String binary) {
  485.         int max = binary.length();
  486.         int result = 0;
  487.         for (int i = max; i > 0; i--) {
  488.             char c = binary.charAt(i - 1);
  489.             int algorism = c - '0';
  490.             result += Math.pow(2, max - i) * algorism;
  491.         }
  492.         return result;
  493.     }
  494.  
  495.     /**
  496.      * 十进制转换为十六进制字符串
  497.      *
  498.      * @param algorism int 十进制的数字
  499.      * @return String 对应的十六进制字符串
  500.      */
  501.     public static String algorismToHEXString(int algorism) {
  502.         String result = "";
  503.         result = Integer.toHexString(algorism);
  504.  
  505.         if (result.length() % 2 == 1) {
  506.             result = "0" + result;
  507.  
  508.         }
  509.         result = result.toUpperCase();
  510.  
  511.         return result;
  512.     }
  513.  
  514.     /**
  515.      * HEX字符串前补0，主要用于长度位数不足。
  516.      *
  517.      * @param str       String 需要补充长度的十六进制字符串
  518.      * @param maxLength int 补充后十六进制字符串的长度
  519.      * @return 补充结果
  520.      */
  521.     static public String patchHexString(String str, int maxLength) {
  522.         String temp = "";
  523.         for (int i = 0; i < maxLength - str.length(); i++) {
  524.             temp = "0" + temp;
  525.         }
  526.         str = (temp + str).substring(0, maxLength);
  527.         return str;
  528.     }
  529.  
  530.     /**
  531.      * 将一个字符串转换为int
  532.      *
  533.      * @param s          String 要转换的字符串
  534.      * @param defaultInt int 如果出现异常,默认返回的数字
  535.      * @param radix      int 要转换的字符串是什么进制的,如16 8 10.
  536.      * @return int 转换后的数字
  537.      */
  538.     public static int parseToInt(String s, int defaultInt, int radix) {
  539.         int i = 0;
  540.         try {
  541.             i = Integer.parseInt(s, radix);
  542.         } catch (NumberFormatException ex) {
  543.             i = defaultInt;
  544.         }
  545.         return i;
  546.     }
  547.  
  548.     /**
  549.      * 将一个十进制形式的数字字符串转换为int
  550.      *
  551.      * @param s          String 要转换的字符串
  552.      * @param defaultInt int 如果出现异常,默认返回的数字
  553.      * @return int 转换后的数字
  554.      */
  555.     public static int parseToInt(String s, int defaultInt) {
  556.         int i = 0;
  557.         try {
  558.             i = Integer.parseInt(s);
  559.         } catch (NumberFormatException ex) {
  560.             i = defaultInt;
  561.         }
  562.         return i;
  563.     }
  564.  
  565.     /**
  566.      * 十六进制串转化为byte数组
  567.      *
  568.      * @return the array of byte
  569.      */
  570.     public static byte[] hexToByte(String hex)
  571.             throws IllegalArgumentException {
  572.         if (hex.length() % 2 != 0) {
  573.             throw new IllegalArgumentException();
  574.         }
  575.         char[] arr = hex.toCharArray();
  576.         byte[] b = new byte[hex.length() / 2];
  577.         for (int i = 0, j = 0, l = hex.length(); i < l; i++, j++) {
  578.             String swap = "" + arr[i++] + arr[i];
  579.             int byteint = Integer.parseInt(swap, 16) & 0xFF;
  580.             b[j] = new Integer(byteint).byteValue();
  581.         }
  582.         return b;
  583.     }
  584.  
  585.     /**
  586.      * 字节数组转换为十六进制字符串
  587.      *
  588.      * @param b byte[] 需要转换的字节数组
  589.      * @return String 十六进制字符串
  590.      */
  591.     public static String byteToHex(byte b[]) {
  592.         if (b == null) {
  593.             throw new IllegalArgumentException(
  594.                     "Argument b ( byte array ) is null! ");
  595.         }
  596.         String hs = "";
  597.         String stmp = "";
  598.         for (int n = 0; n < b.length; n++) {
  599.             stmp = Integer.toHexString(b[n] & 0xff);
  600.             if (stmp.length() == 1) {
  601.                 hs = hs + "0" + stmp;
  602.             } else {
  603.                 hs = hs + stmp;
  604.             }
  605.         }
  606.         return hs.toLowerCase();
  607.         //return hs.toUpperCase();
  608.     }
  609.  
  610.     public static byte[] subByte(byte[] input, int startIndex, int length) {
  611.         byte[] bt = new byte[length];
  612.         for (int i = 0; i < length; i++) {
  613.             bt[i] = input[i + startIndex];
  614.         }
  615.         return bt;
  616.     }
  617. }

SM2对象

  1. package cn.test.encrypt.utils.sm2;
  2.  
  3. import cn.test.encrypt.utils.Util;
  4. import cn.test.encrypt.test.SecurityTestAll;
  5. import org.bouncycastle.math.ec.ECPoint;
  6.  
  7. import java.math.BigInteger;
  8.  
  9. public class SM2KeyVO {
  10.     BigInteger privateKey ;
  11.     ECPoint publicKey ;
  12.  
  13.     public BigInteger getPrivateKey() {
  14.         return privateKey;
  15.     }
  16.  
  17.     public void setPrivateKey(BigInteger privateKey) {
  18.         this.privateKey = privateKey;
  19.     }
  20.  
  21.     public ECPoint getPublicKey() {
  22.         return publicKey;
  23.     }
  24.  
  25.     public void setPublicKey(ECPoint publicKey) {
  26.         this.publicKey = publicKey;
  27.     }
  28.  
  29.     //HardPubKey:3059301306072A8648CE3D020106082A811CCF5501822D03420004+X+Y
  30.     //SoftPubKey:04+X+Y
  31.     public String getPubHexInSoft(){
  32.         return Util.byteToHex(publicKey.getEncoded(true));
  33.         //System.out.println("公钥: " + );
  34.     }
  35.     public String getPubHexInHard(){
  36.         return SecurityTestAll.SM2PubHardKeyHead +Util.byteToHex(publicKey.getEncoded(true));
  37.     }
  38.     public String getPriHexInSoft(){
  39.         return Util.byteToHex(privateKey.toByteArray());
  40.     }
  41. }

测试Demo

  1.  public static void main(String[] args) {
  2.         SM2KeyVO initKeyVO = SM2EncDecUtils.generateKeyPair();
  3.         System.out.println("初始公钥为: "+initKeyVO.getPubHexInSoft());
  4.         System.out.println("初始私钥为: "+initKeyVO.getPriHexInSoft());
  5.     }

输出结果：

 2、数据加解密

简单业务描述：使用初始公钥加密工作公钥，使用初始私钥解密加密后公钥；

Demo

  1.     public static void main(String[] args) throws IOException {
  2.         //生成初始秘钥
  3.         SM2KeyVO initKeyVO = SM2EncDecUtils.generateKeyPair();
  4.         String initPubKey = initKeyVO.getPubHexInSoft();
  5.         String initPriKey = initKeyVO.getPriHexInSoft();
  6.         System.out.println("初始公钥为: " + initPubKey);
  7.         System.out.println("初始私钥为: " + initPriKey);
  8.         //生成工作秘钥
  9.         SM2KeyVO serverKey = SM2EncDecUtils.generateKeyPair();
  10.         String serverPubKey = serverKey.getPubHexInSoft();
  11.         String serverPriKey = serverKey.getPriHexInSoft();
  12.         System.out.println("服务端公钥为: " + serverPubKey);
  13.         System.out.println("服务端私钥为: " + serverPriKey);
  14.         //使用初始公钥加密服务端公钥 注意格式字节数组
  15.         String encryptServerPubKey = SM2EncDecUtils.encrypt(Convert.hexToBytes(initPubKey), serverPubKey.getBytes());
  16.         System.out.println("加密后公钥："+encryptServerPubKey);
  17.         //使用初始私钥解密服务端公钥 注意格式
  18.         byte[] decrypt = SM2EncDecUtils.decrypt(Convert.hexToBytes(initPriKey), Convert.hexToBytes(encryptServerPubKey));
  19.         System.out.println("解密后服务端公钥："+new String(decrypt));
  20.         if (serverPubKey.equals(new String(decrypt)))
  21.             System.out.println("——————————解密成功——————————");
  22.  
  23.     }

结果：

 至此，SM2的公私钥生成以及加解密就完成了，下一期内容为生成Sign以及验证。

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