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cn.hutool.crypto.ECKeyUtil Maven / Gradle / Ivy
package cn.hutool.crypto;
import cn.hutool.core.io.IORuntimeException;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.sec.ECPrivateKey;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.ECUtil;
import org.bouncycastle.jcajce.spec.OpenSSHPrivateKeySpec;
import org.bouncycastle.jcajce.spec.OpenSSHPublicKeySpec;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.math.ec.FixedPointCombMultiplier;
import org.bouncycastle.util.BigIntegers;
import java.io.IOException;
import java.math.BigInteger;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.spec.KeySpec;
/**
* EC密钥参数相关工具类封装
*
* @author looly
* @since 5.4.3
*/
public class ECKeyUtil {
/**
* 密钥转换为AsymmetricKeyParameter
*
* @param key PrivateKey或者PublicKey
* @return ECPrivateKeyParameters或者ECPublicKeyParameters
*/
public static AsymmetricKeyParameter toParams(Key key) {
if (key instanceof PrivateKey) {
return toPrivateParams((PrivateKey) key);
} else if (key instanceof PublicKey) {
return toPublicParams((PublicKey) key);
}
return null;
}
/**
* 根据私钥参数获取公钥参数
*
* @param privateKeyParameters 私钥参数
* @return 公钥参数
* @since 5.5.9
*/
public static ECPublicKeyParameters getPublicParams(ECPrivateKeyParameters privateKeyParameters) {
final ECDomainParameters domainParameters = privateKeyParameters.getParameters();
final ECPoint q = new FixedPointCombMultiplier().multiply(domainParameters.getG(), privateKeyParameters.getD());
return new ECPublicKeyParameters(q, domainParameters);
}
//--------------------------------------------------------------------------- Public Key
/**
* 转换为 ECPublicKeyParameters
*
* @param q 公钥Q值
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toSm2PublicParams(byte[] q) {
return toPublicParams(q, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为 ECPublicKeyParameters
*
* @param q 公钥Q值
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toSm2PublicParams(String q) {
return toPublicParams(q, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为SM2的ECPublicKeyParameters
*
* @param x 公钥X
* @param y 公钥Y
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toSm2PublicParams(String x, String y) {
return toPublicParams(x, y, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为SM2的ECPublicKeyParameters
*
* @param xBytes 公钥X
* @param yBytes 公钥Y
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toSm2PublicParams(byte[] xBytes, byte[] yBytes) {
return toPublicParams(xBytes, yBytes, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为ECPublicKeyParameters
*
* @param x 公钥X
* @param y 公钥Y
* @param domainParameters ECDomainParameters
* @return ECPublicKeyParameters，x或y为{@code null}则返回{@code null}
*/
public static ECPublicKeyParameters toPublicParams(String x, String y, ECDomainParameters domainParameters) {
return toPublicParams(SecureUtil.decode(x), SecureUtil.decode(y), domainParameters);
}
/**
* 转换为ECPublicKeyParameters
*
* @param xBytes 公钥X
* @param yBytes 公钥Y
* @param domainParameters ECDomainParameters曲线参数
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toPublicParams(byte[] xBytes, byte[] yBytes, ECDomainParameters domainParameters) {
if (null == xBytes || null == yBytes) {
return null;
}
return toPublicParams(BigIntegers.fromUnsignedByteArray(xBytes), BigIntegers.fromUnsignedByteArray(yBytes), domainParameters);
}
/**
* 转换为ECPublicKeyParameters
*
* @param x 公钥X
* @param y 公钥Y
* @param domainParameters ECDomainParameters
* @return ECPublicKeyParameters
*/
public static ECPublicKeyParameters toPublicParams(BigInteger x, BigInteger y, ECDomainParameters domainParameters) {
if (null == x || null == y) {
return null;
}
final ECCurve curve = domainParameters.getCurve();
return toPublicParams(curve.createPoint(x, y), domainParameters);
}
/**
* 转换为ECPublicKeyParameters
*
* @param pointEncoded 被编码的曲线坐标点
* @param domainParameters ECDomainParameters
* @return ECPublicKeyParameters
* @since 5.4.3
*/
public static ECPublicKeyParameters toPublicParams(String pointEncoded, ECDomainParameters domainParameters) {
final ECCurve curve = domainParameters.getCurve();
return toPublicParams(curve.decodePoint(SecureUtil.decode(pointEncoded)), domainParameters);
}
/**
* 转换为ECPublicKeyParameters
*
* @param pointEncoded 被编码的曲线坐标点
* @param domainParameters ECDomainParameters
* @return ECPublicKeyParameters
* @since 5.4.3
*/
public static ECPublicKeyParameters toPublicParams(byte[] pointEncoded, ECDomainParameters domainParameters) {
final ECCurve curve = domainParameters.getCurve();
return toPublicParams(curve.decodePoint(pointEncoded), domainParameters);
}
/**
* 转换为ECPublicKeyParameters
*
* @param point 曲线坐标点
* @param domainParameters ECDomainParameters
* @return ECPublicKeyParameters
* @since 5.4.3
*/
public static ECPublicKeyParameters toPublicParams(org.bouncycastle.math.ec.ECPoint point, ECDomainParameters domainParameters) {
return new ECPublicKeyParameters(point, domainParameters);
}
/**
* 公钥转换为 {@link ECPublicKeyParameters}
*
* @param publicKey 公钥，传入null返回null
* @return {@link ECPublicKeyParameters}或null
*/
public static ECPublicKeyParameters toPublicParams(PublicKey publicKey) {
if (null == publicKey) {
return null;
}
try {
return (ECPublicKeyParameters) ECUtil.generatePublicKeyParameter(publicKey);
} catch (InvalidKeyException e) {
throw new CryptoException(e);
}
}
//--------------------------------------------------------------------------- Private Key
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值16进制字符串
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toSm2PrivateParams(String d) {
return toPrivateParams(d, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toSm2PrivateParams(byte[] d) {
return toPrivateParams(d, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toSm2PrivateParams(BigInteger d) {
return toPrivateParams(d, SmUtil.SM2_DOMAIN_PARAMS);
}
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值16进制字符串
* @param domainParameters ECDomainParameters
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toPrivateParams(String d, ECDomainParameters domainParameters) {
if (null == d) {
return null;
}
return toPrivateParams(BigIntegers.fromUnsignedByteArray(SecureUtil.decode(d)), domainParameters);
}
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值
* @param domainParameters ECDomainParameters
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toPrivateParams(byte[] d, ECDomainParameters domainParameters) {
return toPrivateParams(BigIntegers.fromUnsignedByteArray(d), domainParameters);
}
/**
* 转换为 ECPrivateKeyParameters
*
* @param d 私钥d值
* @param domainParameters ECDomainParameters
* @return ECPrivateKeyParameters
*/
public static ECPrivateKeyParameters toPrivateParams(BigInteger d, ECDomainParameters domainParameters) {
if (null == d) {
return null;
}
return new ECPrivateKeyParameters(d, domainParameters);
}
/**
* 私钥转换为 {@link ECPrivateKeyParameters}
*
* @param privateKey 私钥，传入null返回null
* @return {@link ECPrivateKeyParameters}或null
*/
public static ECPrivateKeyParameters toPrivateParams(PrivateKey privateKey) {
if (null == privateKey) {
return null;
}
try {
return (ECPrivateKeyParameters) ECUtil.generatePrivateKeyParameter(privateKey);
} catch (InvalidKeyException e) {
throw new CryptoException(e);
}
}
/**
* 将SM2算法的{@link ECPrivateKey} 转换为 {@link PrivateKey}
*
* @param privateKey {@link ECPrivateKey}
* @return {@link PrivateKey}
*/
public static PrivateKey toSm2PrivateKey(ECPrivateKey privateKey) {
try {
final PrivateKeyInfo info = new PrivateKeyInfo(
new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, SmUtil.ID_SM2_PUBLIC_KEY_PARAM), privateKey);
return KeyUtil.generatePrivateKey("SM2", info.getEncoded());
} catch (IOException e) {
throw new IORuntimeException(e);
}
}
/**
* 创建{@link OpenSSHPrivateKeySpec}
*
* @param key 私钥，需为PKCS#1格式
* @return {@link OpenSSHPrivateKeySpec}
* @since 5.5.9
*/
public static KeySpec createOpenSSHPrivateKeySpec(byte[] key) {
return new OpenSSHPrivateKeySpec(key);
}
/**
* 创建{@link OpenSSHPublicKeySpec}
*
* @param key 公钥，需为PKCS#1格式
* @return {@link OpenSSHPublicKeySpec}
* @since 5.5.9
*/
public static KeySpec createOpenSSHPublicKeySpec(byte[] key) {
return new OpenSSHPublicKeySpec(key);
}
/**
* 尝试解析转换各种类型私钥为{@link ECPrivateKeyParameters}，支持包括：
*
*
*
* @param privateKeyBytes 私钥
* @return {@link ECPrivateKeyParameters}
* @since 5.5.9
*/
public static ECPrivateKeyParameters decodePrivateKeyParams(byte[] privateKeyBytes) {
try {
// 尝试D值
return toSm2PrivateParams(privateKeyBytes);
} catch (Exception ignore) {
// ignore
}
PrivateKey privateKey;
//尝试PKCS#8
try {
privateKey = KeyUtil.generatePrivateKey("sm2", privateKeyBytes);
} catch (Exception ignore) {
// 尝试PKCS#1
privateKey = KeyUtil.generatePrivateKey("sm2", createOpenSSHPrivateKeySpec(privateKeyBytes));
}
return toPrivateParams(privateKey);
}
/**
* 尝试解析转换各种类型公钥为{@link ECPublicKeyParameters}，支持包括：
*
*
*
* @param publicKeyBytes 公钥
* @return {@link ECPublicKeyParameters}
* @since 5.5.9
*/
public static ECPublicKeyParameters decodePublicKeyParams(byte[] publicKeyBytes) {
try {
// 尝试Q值
return toSm2PublicParams(publicKeyBytes);
} catch (Exception ignore) {
// ignore
}
PublicKey publicKey;
//尝试X.509
try {
publicKey = KeyUtil.generatePublicKey("sm2", publicKeyBytes);
} catch (Exception ignore) {
// 尝试PKCS#1
publicKey = KeyUtil.generatePublicKey("sm2", createOpenSSHPublicKeySpec(publicKeyBytes));
}
return toPublicParams(publicKey);
}
}
