package cn.stylefeng.guns.opcua.cert;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.security.Key;
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import java.security.KeyPair;
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import java.security.KeyStore;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import java.security.cert.X509Certificate;
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import java.util.regex.Pattern;
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import org.eclipse.milo.opcua.sdk.server.util.HostnameUtil;
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import org.eclipse.milo.opcua.stack.core.util.SelfSignedCertificateBuilder;
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import org.eclipse.milo.opcua.stack.core.util.SelfSignedCertificateGenerator;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Component;
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/**
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* @ClassName: KeyStoreLoader
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* @Description: KeyStoreLoader
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* @author yyt
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* @date 2023年10月13日
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*/
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@Component
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public class KeyStoreLoader {
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private static final Pattern IP_ADDR_PATTERN = Pattern
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.compile("^(([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d\\d?|2[0-4]\\d|25[0-5])$");
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// 证书别名
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private static final String CLIENT_ALIAS = "jlclient-ai";
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// 获取私钥的密码
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private static final char[] PASSWORD = "yyt@8888888888".toCharArray();
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private final Logger logger = LoggerFactory.getLogger(getClass());
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// 证书对象
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private X509Certificate clientCertificate;
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// 密钥对对象
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private KeyPair clientKeyPair;
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/**
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* @MethodName: load
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* @Description: load
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* @param baseDir
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* @return
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* @throws Exception
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* @CreateTime 2023年10月13日
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*/
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public KeyStoreLoader load(Path baseDir) throws Exception {
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// 创建一个使用`PKCS12`加密标准的KeyStore。KeyStore在后面将作为读取和生成证书的对象。
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KeyStore keyStore = KeyStore.getInstance("PKCS12");
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// PKCS12的加密标准的文件后缀是.pfx，其中包含了公钥和私钥。
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// 而其他如.der等的格式只包含公钥，私钥在另外的文件中。
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Path serverKeyStore = baseDir.resolve("OPCUA-client.pfx");
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logger.info("Loading KeyStore at {}", serverKeyStore);
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// 如果文件不存在则创建.pfx证书文件。
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if (!Files.exists(serverKeyStore)) {
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keyStore.load(null, PASSWORD);
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// 用2048位的RAS算法。`SelfSignedCertificateGenerator`为Milo库的对象。
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KeyPair keyPair = SelfSignedCertificateGenerator.generateRsaKeyPair(2048);
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// `SelfSignedCertificateBuilder`也是Milo库的对象，用来生成证书。
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// 中间所设置的证书属性可以自行修改。
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SelfSignedCertificateBuilder builder = new SelfSignedCertificateBuilder(keyPair)
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.setCommonName("UaClient@Jellyleo")
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.setOrganization("JL")
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.setOrganizationalUnit("per")
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.setLocalityName("jl")
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.setStateName("JiangSu")
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.setCountryCode("CN")
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.setApplicationUri("urn:Yyt_PC:UnifiedAutomation:UaExpert")
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.addDnsName("Yyt_PC")
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.addIpAddress("127.0.0.1");
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// Get as many hostnames and IP addresses as we can listed in the certificate.
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for (String hostname : HostnameUtil.getHostnames("0.0.0.0")) {
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if (IP_ADDR_PATTERN.matcher(hostname).matches()) {
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builder.addIpAddress(hostname);
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} else {
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builder.addDnsName(hostname);
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}
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}
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// 创建证书
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X509Certificate certificate = builder.build();
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// 设置对应私钥的别名，密码，证书链
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keyStore.setKeyEntry(CLIENT_ALIAS, keyPair.getPrivate(), PASSWORD, new X509Certificate[] { certificate });
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try (OutputStream out = Files.newOutputStream(serverKeyStore)) {
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// 保存证书到输出流
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keyStore.store(out, PASSWORD);
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}
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} else {
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try (InputStream in = Files.newInputStream(serverKeyStore)) {
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// 如果文件存在则读取
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keyStore.load(in, PASSWORD);
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}
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}
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// 用密码获取对应别名的私钥。
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Key serverPrivateKey = keyStore.getKey(CLIENT_ALIAS, PASSWORD);
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if (serverPrivateKey instanceof PrivateKey) {
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// 获取对应别名的证书对象。
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clientCertificate = (X509Certificate) keyStore.getCertificate(CLIENT_ALIAS);
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// 获取公钥
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PublicKey serverPublicKey = clientCertificate.getPublicKey();
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// 创建Keypair对象。
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clientKeyPair = new KeyPair(serverPublicKey, (PrivateKey) serverPrivateKey);
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}
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return this;
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}
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// 返回证书
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public X509Certificate getClientCertificate() {
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return clientCertificate;
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}
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// 返回密钥对
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public KeyPair getClientKeyPair() {
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return clientKeyPair;
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}
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}
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