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identity(without persist & without test)
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package minsecurity.crypto.sm2;
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import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
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import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
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import org.bouncycastle.crypto.params.ECDomainParameters;
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import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
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import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
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import org.bouncycastle.crypto.params.ECPublicKeyParameters;
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import org.bouncycastle.crypto.util.PrivateKeyInfoFactory;
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import org.bouncycastle.crypto.util.SubjectPublicKeyInfoFactory;
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import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPrivateKey;
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import org.bouncycastle.jcajce.provider.asymmetric.ec.BCECPublicKey;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import org.bouncycastle.jce.spec.ECParameterSpec;
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import org.bouncycastle.math.ec.ECPoint;
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import org.bouncycastle.math.ec.custom.gm.SM2P256V1Curve;
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import org.slf4j.LoggerFactory;
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import java.math.BigInteger;
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import java.security.*;
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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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import static minsecurity.Common.ALGO_NAME_EC;
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/*
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* @Author: hongyu guo
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* @Description: SM2推荐曲线参数
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* @Version: 1.0.0
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* @Date: 18:48 2021/03/03
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* @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
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*/
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public class SM2Base {
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static {
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Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
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}
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private static final org.slf4j.Logger logger = LoggerFactory.getLogger(SM2Base.class);
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/*
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* 以下为SM2推荐曲线参数
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*/
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public static final SM2P256V1Curve CURVE = new SM2P256V1Curve();
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public final static BigInteger SM2_ECC_P = CURVE.getQ();
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public final static BigInteger SM2_ECC_A = CURVE.getA().toBigInteger();
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public final static BigInteger SM2_ECC_B = CURVE.getB().toBigInteger();
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public final static BigInteger SM2_ECC_N = CURVE.getOrder();
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public final static BigInteger SM2_ECC_H = CURVE.getCofactor();
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public final static BigInteger SM2_ECC_GX = new BigInteger(
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"32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7", 16);
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public final static BigInteger SM2_ECC_GY = new BigInteger(
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"BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0", 16);
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public static final ECPoint G_POINT = CURVE.createPoint(SM2_ECC_GX, SM2_ECC_GY);
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public static final ECDomainParameters DOMAIN_PARAMS = new ECDomainParameters(CURVE, G_POINT,
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SM2_ECC_N, SM2_ECC_H);
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private static final String PEM_STRING_PUBLIC = "PUBLIC KEY";
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private static final String PEM_STRING_ECPRIVATEKEY = "EC PRIVATE KEY";
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/**
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* 生成BC自定义的SM2公私钥
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* @param
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* @return org.bouncycastle.crypto.AsymmetricCipherKeyPair
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static AsymmetricCipherKeyPair generateKeyPairParameter(){
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SecureRandom random = new SecureRandom();
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ECKeyGenerationParameters keyGenerationParams = new ECKeyGenerationParameters(DOMAIN_PARAMS,
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random);
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ECKeyPairGenerator keyGen = new ECKeyPairGenerator();
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keyGen.init(keyGenerationParams);
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AsymmetricCipherKeyPair keyPair = keyGen.generateKeyPair();
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return keyPair;
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}
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/**
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* 生成java.security.KeyPair类型的SM2公私钥
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* @param
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* @return java.security.KeyPair
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static KeyPair generateKeyPair() throws NoSuchProviderException, NoSuchAlgorithmException,
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InvalidAlgorithmParameterException {
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SecureRandom random = new SecureRandom();
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return generateKeyPair(DOMAIN_PARAMS, random);
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}
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/**
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* 生成java.security.KeyPair类型的SM2公私钥, 需自定义曲线参数
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* @param domainParameters
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* @param random
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* @return
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static KeyPair generateKeyPair(ECDomainParameters domainParameters, SecureRandom random)
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throws NoSuchProviderException, NoSuchAlgorithmException,
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InvalidAlgorithmParameterException {
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KeyPairGenerator kpg = KeyPairGenerator.getInstance(ALGO_NAME_EC, BouncyCastleProvider.PROVIDER_NAME);
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ECParameterSpec parameterSpec = new ECParameterSpec(domainParameters.getCurve(), domainParameters.getG(),
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domainParameters.getN(), domainParameters.getH());
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kpg.initialize(parameterSpec, random);
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return kpg.generateKeyPair();
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}
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/**
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* BC公私钥转换为java.security.KeyPair公私钥
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* @param bcKeyPair
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* @return
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static KeyPair convertBcToJceKeyPair(AsymmetricCipherKeyPair bcKeyPair) throws Exception {
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byte[] pkcs8Encoded = PrivateKeyInfoFactory.createPrivateKeyInfo(bcKeyPair.getPrivate()).getEncoded();
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PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(pkcs8Encoded);
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byte[] spkiEncoded = SubjectPublicKeyInfoFactory.createSubjectPublicKeyInfo(bcKeyPair.getPublic()).getEncoded();
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X509EncodedKeySpec spkiKeySpec = new X509EncodedKeySpec(spkiEncoded);
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KeyFactory keyFac = KeyFactory.getInstance(ALGO_NAME_EC, BouncyCastleProvider.PROVIDER_NAME);
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return new KeyPair(keyFac.generatePublic(spkiKeySpec), keyFac.generatePrivate(pkcs8KeySpec));
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}
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/**
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* java.security.KeyPair转换为BC类型的公私钥对
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* @param keyPair
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* @return
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static AsymmetricCipherKeyPair convertKeyPair2Bc(KeyPair keyPair) {
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ECPrivateKeyParameters priKey = convertPrivateKeyToParameters((BCECPrivateKey) keyPair.getPrivate());
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ECPublicKeyParameters pubKey = convertPublicKeyToParameters((BCECPublicKey) keyPair.getPublic());
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return new AsymmetricCipherKeyPair(priKey,pubKey);
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}
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/**
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* BCECPrivateKey类型私钥转化为ECPrivateKeyParameters类型的私钥,
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* 调用者若想将java.security.PrivateKey转化为ECPrivateKeyParameters, 调用时将其强制转换为BCECPrivateKey类型
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* @param ecPriKey
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* @return ECPrivateKeyParameters
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static ECPrivateKeyParameters convertPrivateKeyToParameters(BCECPrivateKey ecPriKey) {
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ECParameterSpec parameterSpec = ecPriKey.getParameters();
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ECDomainParameters domainParameters = new ECDomainParameters(parameterSpec.getCurve(), parameterSpec.getG(),
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parameterSpec.getN(), parameterSpec.getH());
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return new ECPrivateKeyParameters(ecPriKey.getD(), domainParameters);
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}
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/**
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* BCECPublicKey类型私钥转化为ECPublicKeyParameters类型的私钥,
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* 调用者若想将java.security.PublicKey转化为ECPublicKeyParameters, 调用时将其强制转换为BCECPublicKey类型
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* @param ecPubKey
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* @return ECPrivateKeyParameters
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* @author hongyu guo
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* @date 2021/3/7
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**/
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public static ECPublicKeyParameters convertPublicKeyToParameters(BCECPublicKey ecPubKey) {
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ECParameterSpec parameterSpec = ecPubKey.getParameters();
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ECDomainParameters domainParameters = new ECDomainParameters(parameterSpec.getCurve(), parameterSpec.getG(),
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parameterSpec.getN(), parameterSpec.getH());
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return new ECPublicKeyParameters(ecPubKey.getQ(), domainParameters);
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}
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}
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