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import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.stereotype.Component;
import org.springframework.ws.WebServiceMessage;
import org.springframework.ws.soap.saaj.SaajSoapMessage;

import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.Reference;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.Transform;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.soap.*;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.PrivateKey;
import java.security.Provider;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Base64;

@Slf4j
@Component
public class SoapSignService {

    private final KeyStore keystore;
    private final String password;
    private final String keystoreAlias;

    @Value("${mastercard.system.institutionName}")
    private String institutionName;

    @Autowired
    public SoapSignService(@Value("${mastercard.keystore.sign.path}") String path,
                           @Value("${mastercard.keystore.sign.password}") String password,
                           @Value("${mastercard.keystore.sign.alias}") String keystoreAlias) throws Exception {
        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        byte[] keystoreBytes;
        try (InputStream inputStream = resolver.getResource(path).getInputStream()) {
            keystoreBytes = IOUtils.toByteArray(inputStream);
        } catch (Exception e) {
            log.error("签名秘钥文件signing.jks读取异常, keystore: {}", path);
            throw e;
        }

        this.keystore = KeyStore.getInstance("PKCS12");
        this.keystore.load(new ByteArrayInputStream(keystoreBytes), password.toCharArray());
        this.password = password;
        this.keystoreAlias = keystoreAlias;
    }

    private PrivateKey getKeyFormCert() throws Exception {
        return (PrivateKey) keystore.getKey(keystoreAlias, password.toCharArray());
    }

    private java.security.cert.Certificate getCertificate() throws Exception {
        return keystore.getCertificate(keystoreAlias);
    }

    public void sign(WebServiceMessage message) {
        sign("", message);
    }

    public void sign(String appId, WebServiceMessage message) {
        this.sign(appId, ((SaajSoapMessage) message).getSaajMessage());
    }

    public void sign(String appId, SOAPMessage soapMessage) {
        try {
            SOAPEnvelope soapEnvelope = soapMessage.getSOAPPart().getEnvelope();
            soapEnvelope.setPrefix("soapenv");
            soapEnvelope.removeNamespaceDeclaration("SOAP-ENV");
            soapEnvelope.addNamespaceDeclaration("com", "http://common.ws.mcrewards.mastercard.com/");

            SOAPHeader header = soapMessage.getSOAPHeader();
            header.setPrefix("soapenv");
            SOAPElement identity = header.addChildElement("identity", "com");
            identity.addAttribute(soapEnvelope.createName("Id", "wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"), "IDENTITY");

            SOAPElement appID = identity.addChildElement("appID");
            appID.addTextNode(appId);
            SOAPElement institutionName = identity.addChildElement("institutionName");
            institutionName.addTextNode(this.institutionName);

            SOAPBody soapBody = soapMessage.getSOAPBody();
            soapBody.setPrefix("soapenv");
            soapBody.addAttribute(soapEnvelope.createName("Id", "wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"), "Body");

            signSOAPMessage(soapMessage);
        } catch (Exception e) {
            log.error(e.getMessage(), e);
            throw new RuntimeException(e);
        }
    }

    private void signSOAPMessage(SOAPMessage soapMessage) throws Exception {
        
        SOAPElement soapHeader = soapMessage.getSOAPHeader();
        SOAPElement securityElement = soapHeader.addChildElement("Security", "wsse", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
        securityElement.addNamespaceDeclaration("wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");

        
        java.security.cert.Certificate cert = getCertificate();

        
        SOAPElement binarySecurityToken = addBinarySecurityToken(securityElement, soapMessage, cert);

        
        SOAPElement timestamp = addTimestamp(securityElement, soapMessage);

        
        
        PrivateKey key = getKeyFormCert();
        SOAPElement securityTokenReference = addSecurityToken(securityElement);
        addSignature(securityElement, key, securityTokenReference, soapMessage.getSOAPBody(), timestamp, binarySecurityToken);
    }

    private SOAPElement addSecurityToken(SOAPElement signature) throws SOAPException {
        SOAPElement securityTokenReference = signature.addChildElement("SecurityTokenReference", "wsse");
        SOAPElement reference = securityTokenReference.addChildElement("Reference", "wsse");
        reference.setAttribute("URI", "#X509Token");
        return securityTokenReference;
    }

    private void addSignature(SOAPElement signatureElement, PrivateKey privateKey, SOAPElement securityTokenReference, SOAPBody soapBody, SOAPElement timestamp, SOAPElement binarySecurityToken) throws Exception {
        String providerName = System.getProperty("jsr105Provider", "org.jcp.xml.dsig.internal.dom.XMLDSigRI");
        XMLSignatureFactory xmlSignatureFactory = XMLSignatureFactory.getInstance("DOM", (Provider) Class.forName(providerName).newInstance());

        
        javax.xml.crypto.dsig.DigestMethod digestMethod = xmlSignatureFactory.newDigestMethod("http://www.w3.org/2001/04/xmlenc#sha512", null);
        ArrayList<Transform> transformList = new ArrayList<>();

        
        Transform envTransform = xmlSignatureFactory.newTransform("http://www.w3.org/2001/10/xml-exc-c14n#", (TransformParameterSpec) null);
        transformList.add(envTransform);

        
        ArrayList<Reference> referenceList = new ArrayList<>();
        Reference x509 = xmlSignatureFactory.newReference("#X509Token", digestMethod, transformList, null, null);
        Reference refTS = xmlSignatureFactory.newReference("#TS", digestMethod, transformList, null, null);
        Reference refBody = xmlSignatureFactory.newReference("#Body", digestMethod, transformList, null, null);
        Reference header = xmlSignatureFactory.newReference("#IDENTITY", digestMethod, transformList, null, null);
        referenceList.add(x509);
        referenceList.add(refTS);
        referenceList.add(refBody);
        referenceList.add(header);

        javax.xml.crypto.dsig.CanonicalizationMethod cm = xmlSignatureFactory.newCanonicalizationMethod("http://www.w3.org/2001/10/xml-exc-c14n#", (C14NMethodParameterSpec) null);
        javax.xml.crypto.dsig.SignatureMethod sm = xmlSignatureFactory.newSignatureMethod("http://www.w3.org/2001/04/xmldsig-more#rsa-sha512", null);
        SignedInfo signedInfo = xmlSignatureFactory.newSignedInfo(cm, sm, referenceList);


        DOMSignContext signContext = new DOMSignContext(privateKey, signatureElement);
        signContext.setDefaultNamespacePrefix("ds");
        signContext.putNamespacePrefix("http://www.w3.org/2000/09/xmldsig#", "ds");

        
        signContext.setIdAttributeNS(soapBody, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Id");
        signContext.setIdAttributeNS(timestamp, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Id");
        signContext.setIdAttributeNS(binarySecurityToken, "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd", "Id");

        KeyInfoFactory keyFactory = KeyInfoFactory.getInstance();
        DOMStructure domKeyInfo = new DOMStructure(securityTokenReference);
        javax.xml.crypto.dsig.keyinfo.KeyInfo keyInfo = keyFactory.newKeyInfo(java.util.Collections.singletonList(domKeyInfo));
        javax.xml.crypto.dsig.XMLSignature signature = xmlSignatureFactory.newXMLSignature(signedInfo, keyInfo);
        signContext.setBaseURI("");
        signature.sign(signContext);
    }

    private SOAPElement addTimestamp(SOAPElement securityElement, SOAPMessage soapMessage) throws SOAPException {
        SOAPElement timestamp = securityElement.addChildElement("Timestamp", "wsu");
        SOAPEnvelope soapEnvelope = soapMessage.getSOAPPart().getEnvelope();
        timestamp.addAttribute(soapEnvelope.createName("Id", "wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"), "TS");

        String DATE_TIME_PATTERN = "yyyy-MM-dd'T'HH:mm:ssX";
        DateTimeFormatter timeStampFormatter = DateTimeFormatter.ofPattern(DATE_TIME_PATTERN);
        ZonedDateTime zonedDateTime = ZonedDateTime.now();
        timestamp.addChildElement("Created", "wsu").setValue(timeStampFormatter.format(zonedDateTime.toInstant().atZone(ZoneId.of("UTC"))));
        timestamp.addChildElement("Expires", "wsu").setValue(timeStampFormatter.format(zonedDateTime.plusSeconds(60).toInstant().atZone(ZoneId.of("UTC"))));
        return timestamp;
    }

    private SOAPElement addBinarySecurityToken(SOAPElement securityElement, SOAPMessage soapMessage, java.security.cert.Certificate cert) throws Exception {
        byte[] certByte = cert.getEncoded();
        SOAPElement binarySecurityToken = securityElement.addChildElement("BinarySecurityToken", "wsse");

        binarySecurityToken.setAttribute("ValueType", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3");
        binarySecurityToken.setAttribute("EncodingType", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary");
        SOAPEnvelope soapEnvelope = soapMessage.getSOAPPart().getEnvelope();

        binarySecurityToken.addAttribute(soapEnvelope.createName("Id", "wsu", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"), "X509Token");
        binarySecurityToken.addTextNode(Base64.getEncoder().encodeToString(certByte));
        return binarySecurityToken;
    }

}