/** * POST TITLE: SPIRE for Workload Identity in Java * * Complete implementation of SPIRE (SPIFFE Runtime Environment) for workload identity in Java applications */ import io.fabric8.kubernetes.client.KubernetesClient; import io.fabric8.kubernetes.client.KubernetesClientBuilder; import io.fabric8.kubernetes.api.model.*; import org.bouncycastle.asn1.x509.GeneralName; import org.bouncycastle.openssl.jcajce.JcaPEMWriter; import java.io.*; import java.net.http.HttpClient; import java.net.http.HttpRequest; import java.net.http.HttpResponse; import java.net.URI; import java.nio.file.*; import java.security.*; import java.security.cert.*; import java.util.*; import java.util.concurrent.*; public class SPIREJavaIntegration { /** * SPIFFE ID and SVID Management */ public static class SPIFFEIdentityManager { private final String spireSocketPath; private final String trustDomain; private final HttpClient httpClient; public SPIFFEIdentityManager(String spireSocketPath, String trustDomain) { this.spireSocketPath = spireSocketPath; this.trustDomain = trustDomain; this.httpClient = HttpClient.newBuilder() .version(HttpClient.Version.HTTP_1_1) .build(); } /** * SPIFFE ID representation */ public static class SPIFFEID { private final String trustDomain; private final List<String> pathSegments; public SPIFFEID(String trustDomain, String... pathSegments) { this.trustDomain = trustDomain; this.pathSegments = Arrays.asList(pathSegments); } public String toString() { return "spiffe://" + trustDomain + "/" + String.join("/", pathSegments); } public static SPIFFEID parse(String spiffeId) { if (!spiffeId.startsWith("spiffe://")) { throw new IllegalArgumentException("Invalid SPIFFE ID format"); } String withoutScheme = spiffeId.substring(9); int slashIndex = withoutScheme.indexOf('/'); String trustDomain = withoutScheme.substring(0, slashIndex); String path = withoutScheme.substring(slashIndex + 1); return new SPIFFEID(trustDomain, path.split("/")); } // Getters public String getTrustDomain() { return trustDomain; } public List<String> getPathSegments() { return pathSegments; } } /** * SVID (SPIFFE Verifiable Identity Document) */ public static class SVID { private final SPIFFEID spiffeId; private final X509Certificate certificate; private final PrivateKey privateKey; private final List<X509Certificate> certificateChain; private final Date expiry; public SVID(SPIFFEID spiffeId, X509Certificate certificate, PrivateKey privateKey, List<X509Certificate> certificateChain) { this.spiffeId = spiffeId; this.certificate = certificate; this.privateKey = privateKey; this.certificateChain = certificateChain; this.expiry = certificate.getNotAfter(); } // Getters public SPIFFEID getSpiffeId() { return spiffeId; } public X509Certificate getCertificate() { return certificate; } public PrivateKey getPrivateKey() { return privateKey; } public List<X509Certificate> getCertificateChain() { return certificateChain; } public Date getExpiry() { return expiry; } public boolean isExpired() { return new Date().after(expiry); } public boolean expiresSoon(long milliseconds) { return new Date().getTime() > (expiry.getTime() - milliseconds); } } /** * Fetch SVID from SPIRE agent */ public SVID fetchSVID(String workloadSocketPath) throws Exception { // Using SPIRE Workload API Map<String, String> headers = new HashMap<>(); headers.put("X-Spiffe-ID", "default"); // Requesting default SVID HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://unix" + workloadSocketPath + "/workload")) .headers(createHeaders(headers)) .GET() .build(); HttpResponse<byte[]> response = httpClient.send(request, HttpResponse.BodyHandlers.ofByteArray()); if (response.statusCode() != 200) { throw new RuntimeException("Failed to fetch SVID: " + response.statusCode()); } return parseSVIDResponse(response.body()); } /** * Fetch SVID with specific SPIFFE ID */ public SVID fetchSVIDForIdentity(SPIFFEID spiffeId, String workloadSocketPath) throws Exception { Map<String, String> headers = new HashMap<>(); headers.put("X-Spiffe-ID", spiffeId.toString()); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("http://unix" + workloadSocketPath + "/workload")) .headers(createHeaders(headers)) .GET() .build(); HttpResponse<byte[]> response = httpClient.send(request, HttpResponse.BodyHandlers.ofByteArray()); return parseSVIDResponse(response.body()); } private SVID parseSVIDResponse(byte[] responseBody) throws Exception { // Parse Workload API response (simplified) // In reality, this would parse the protobuf response CertificateFactory certFactory = CertificateFactory.getInstance("X.509"); // Mock parsing - actual implementation would use proper protobuf parsing ByteArrayInputStream certStream = new ByteArrayInputStream(responseBody); X509Certificate cert = (X509Certificate) certFactory.generateCertificate(certStream); // Extract SPIFFE ID from certificate SPIFFEID spiffeId = extractSPIFFEIDFromCertificate(cert); // Generate mock private key (in reality, this comes from the response) KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); keyGen.initialize(2048); PrivateKey privateKey = keyGen.generateKeyPair().getPrivate(); return new SVID(spiffeId, cert, privateKey, Arrays.asList(cert)); } private SPIFFEID extractSPIFFEIDFromCertificate(X509Certificate cert) throws Exception { // Extract SPIFFE ID from certificate URI SAN Collection<List<?>> subjectAlternativeNames = cert.getSubjectAlternativeNames(); if (subjectAlternativeNames != null) { for (List<?> san : subjectAlternativeNames) { Integer type = (Integer) san.get(0); if (type == 6) { // URI type String uri = (String) san.get(1); if (uri.startsWith("spiffe://")) { return SPIFFEID.parse(uri); } } } } throw new IllegalArgumentException("No SPIFFE ID found in certificate"); } private String[] createHeaders(Map<String, String> headers) { return headers.entrySet().stream() .flatMap(entry -> Arrays.stream(new String[]{entry.getKey(), entry.getValue()})) .toArray(String[]::new); } /** * Validate SPIFFE ID against trust domain */ public boolean validateSPIFFEID(SPIFFEID spiffeId) { return trustDomain.equals(spiffeId.getTrustDomain()); } /** * Create SPIFFE ID for Kubernetes workload */ public SPIFFEID createK8sSPIFFEID(String namespace, String serviceAccount, String podName) { return new SPIFFEID(trustDomain, "ns", namespace, "sa", serviceAccount, "pod", podName); } /** * Create SPIFFE ID for service */ public SPIFFEID createServiceSPIFFEID(String serviceName) { return new SPIFFEID(trustDomain, "svc", serviceName); } } /** * SPIRE Agent Configuration Manager */ public static class SPIREAgentManager { private final KubernetesClient k8sClient; private final String namespace; public SPIREAgentManager(KubernetesClient k8sClient, String namespace) { this.k8sClient = k8sClient; this.namespace = namespace; } /** * SPIRE Agent Configuration */ public static class SPIREAgentConfig { private String trustDomain; private String socketPath = "/run/spire/sockets/agent.sock"; private String dataDir = "/run/spire/data"; private Map<String, String> plugins; private List<NodeAttestorConfig> nodeAttestors; private List<WorkloadAttestorConfig> workloadAttestors; private KeyManagerConfig keyManager; private TelemetryConfig telemetry; public SPIREAgentConfig(String trustDomain) { this.trustDomain = trustDomain; this.plugins = new HashMap<>(); this.nodeAttestors = new ArrayList<>(); this.workloadAttestors = new ArrayList<>(); initializeDefaults(); } private void initializeDefaults() { // Default plugins plugins.put("KeyManager", "disk"); plugins.put("NodeAttestor", "k8s_psat"); plugins.put("WorkloadAttestor", "k8s"); plugins.put("DataStore", "sql"); // Default node attestors nodeAttestors.add(new NodeAttestorConfig("k8s_psat") .withConfig("cluster", "kubernetes") .withConfig("service_account_allow_list", Arrays.asList("spire:spire-agent"))); // Default workload attestors workloadAttestors.add(new WorkloadAttestorConfig("k8s") .withConfig("kubeconfig_file", "/etc/kubernetes/kubeconfig") .withConfig("node_name_env", "MY_NODE_NAME")); // Key manager keyManager = new KeyManagerConfig("disk") .withConfig("directory", "./data/agent"); // Telemetry telemetry = new TelemetryConfig() .withPrometheusEnabled(true) .withPrometheusPort(9988); } // Builder methods public SPIREAgentConfig withSocketPath(String socketPath) { this.socketPath = socketPath; return this; } public SPIREAgentConfig withPlugin(String name, String implementation) { this.plugins.put(name, implementation); return this; } public SPIREAgentConfig withNodeAttestor(NodeAttestorConfig attestor) { this.nodeAttestors.add(attestor); return this; } public SPIREAgentConfig withWorkloadAttestor(WorkloadAttestorConfig attestor) { this.workloadAttestors.add(attestor); return this; } public SPIREAgentConfig withKeyManager(KeyManagerConfig keyManager) { this.keyManager = keyManager; return this; } public SPIREAgentConfig withTelemetry(TelemetryConfig telemetry) { this.telemetry = telemetry; return this; } // Getters public String getTrustDomain() { return trustDomain; } public String getSocketPath() { return socketPath; } public String getDataDir() { return dataDir; } public Map<String, String> getPlugins() { return plugins; } public List<NodeAttestorConfig> getNodeAttestors() { return nodeAttestors; } public List<WorkloadAttestorConfig> getWorkloadAttestors() { return workloadAttestors; } public KeyManagerConfig getKeyManager() { return keyManager; } public TelemetryConfig getTelemetry() { return telemetry; } } public static class NodeAttestorConfig { private String name; private Map<String, Object> config; public NodeAttestorConfig(String name) { this.name = name; this.config = new HashMap<>(); } public NodeAttestorConfig withConfig(String key, Object value) { this.config.put(key, value); return this; } // Getters public String getName() { return name; } public Map<String, Object> getConfig() { return config; } } public static class WorkloadAttestorConfig { private String name; private Map<String, Object> config; public WorkloadAttestorConfig(String name) { this.name = name; this.config = new HashMap<>(); } public WorkloadAttestorConfig withConfig(String key, Object value) { this.config.put(key, value); return this; } // Getters public String getName() { return name; } public Map<String, Object> getConfig() { return config; } } public static class KeyManagerConfig { private String plugin; private Map<String, Object> config; public KeyManagerConfig(String plugin) { this.plugin = plugin; this.config = new HashMap<>(); } public KeyManagerConfig withConfig(String key, Object value) { this.config.put(key, value); return this; } // Getters public String getPlugin() { return plugin; } public Map<String, Object> getConfig() { return config; } } public static class TelemetryConfig { private boolean prometheusEnabled; private int prometheusPort; private Map<String, Object> config; public TelemetryConfig() { this.config = new HashMap<>(); } public TelemetryConfig withPrometheusEnabled(boolean enabled) { this.prometheusEnabled = enabled; return this; } public TelemetryConfig withPrometheusPort(int port) { this.prometheusPort = port; return this; } public TelemetryConfig withConfig(String key, Object value) { this.config.put(key, value); return this; } // Getters public boolean isPrometheusEnabled() { return prometheusEnabled; } public int getPrometheusPort() { return prometheusPort; } public Map<String, Object> getConfig() { return config; } } /** * Deploy SPIRE agent to Kubernetes */ public void deploySPIREAgent(SPIREAgentConfig config) { try { System.out.println("🚀 Deploying SPIRE Agent..."); // Create ConfigMap for agent configuration ConfigMap agentConfigMap = createAgentConfigMap(config); k8sClient.configMaps().inNamespace(namespace).createOrReplace(agentConfigMap); // Create ServiceAccount ServiceAccount serviceAccount = createServiceAccount(); k8sClient.serviceAccounts().inNamespace(namespace).createOrReplace(serviceAccount); // Create DaemonSet for SPIRE agent DaemonSet daemonSet = createAgentDaemonSet(config); k8sClient.apps().daemonSets().inNamespace(namespace).createOrReplace(daemonSet); System.out.println("✅ SPIRE Agent deployed successfully"); } catch (Exception e) { System.err.println("❌ Failed to deploy SPIRE Agent: " + e.getMessage()); throw new RuntimeException("SPIRE Agent deployment failed", e); } } private ConfigMap createAgentConfigMap(SPIREAgentConfig config) { String agentConf = generateAgentConfig(config); return new ConfigMapBuilder() .withNewMetadata() .withName("spire-agent-config") .withNamespace(namespace) .endMetadata() .withData(Map.of("agent.conf", agentConf)) .build(); } private String generateAgentConfig(SPIREAgentConfig config) { // Generate HCL configuration for SPIRE agent return String.format(""" agent { data_dir = "%s" trust_domain = "%s" server_address = "spire-server" server_port = 8081 socket_path = "%s" log_level = "DEBUG" } plugins { %s } """, config.getDataDir(), config.getTrustDomain(), config.getSocketPath(), generatePluginsConfig(config)); } private String generatePluginsConfig(SPIREAgentConfig config) { StringBuilder sb = new StringBuilder(); // Node attestors for (NodeAttestorConfig attestor : config.getNodeAttestors()) { sb.append(String.format(""" NodeAttestor "%s" { plugin_data { %s } } """, attestor.getName(), generatePluginData(attestor.getConfig()))); } // Workload attestors for (WorkloadAttestorConfig attestor : config.getWorkloadAttestors()) { sb.append(String.format(""" WorkloadAttestor "%s" { plugin_data { %s } } """, attestor.getName(), generatePluginData(attestor.getConfig()))); } return sb.toString(); } private String generatePluginData(Map<String, Object> config) { StringBuilder sb = new StringBuilder(); for (Map.Entry<String, Object> entry : config.entrySet()) { if (entry.getValue() instanceof List) { sb.append(entry.getKey()).append(" = ["); @SuppressWarnings("unchecked") List<Object> list = (List<Object>) entry.getValue(); for (Object item : list) { sb.append("\"").append(item).append("\", "); } sb.append("]\n"); } else { sb.append(entry.getKey()).append(" = \"").append(entry.getValue()).append("\"\n"); } } return sb.toString(); } private ServiceAccount createServiceAccount() { return new ServiceAccountBuilder() .withNewMetadata() .withName("spire-agent") .withNamespace(namespace) .endMetadata() .build(); } private DaemonSet createAgentDaemonSet(SPIREAgentConfig config) { return new DaemonSetBuilder() .withNewMetadata() .withName("spire-agent") .withNamespace(namespace) .endMetadata() .withNewSpec() .withNewSelector() .addToMatchLabels("app", "spire-agent") .endSelector() .withNewTemplate() .withNewMetadata() .withLabels(Map.of("app", "spire-agent")) .endMetadata() .withNewSpec() .withServiceAccountName("spire-agent") .withHostNetwork(true) .withContainers(createAgentContainer(config)) .withVolumes(createAgentVolumes()) .endSpec() .endTemplate() .endSpec() .build(); } private List<Container> createAgentContainer(SPIREAgentConfig config) { Container container = new ContainerBuilder() .withName("spire-agent") .withImage("spiffe/spire-agent:1.6.0") .withArgs(Arrays.asList( "-config", "/run/spire/config/agent.conf" )) .withPorts(Arrays.asList( new ContainerPortBuilder() .withContainerPort(8081) .withName("grpc") .build() )) .withVolumeMounts(Arrays.asList( new VolumeMountBuilder() .withName("spire-config") .withMountPath("/run/spire/config") .withReadOnly(true) .build(), new VolumeMountBuilder() .withName("spire-sockets") .withMountPath("/run/spire/sockets") .build(), new VolumeMountBuilder() .withName("spire-data") .withMountPath("/run/spire/data") .build() )) .withLivenessProbe(createLivenessProbe()) .withReadinessProbe(createReadinessProbe()) .build(); return Arrays.asList(container); } private List<Volume> createAgentVolumes() { return Arrays.asList( new VolumeBuilder() .withName("spire-config") .withConfigMap(new ConfigMapVolumeSourceBuilder() .withName("spire-agent-config") .build()) .build(), new VolumeBuilder() .withName("spire-sockets") .withHostPath(new HostPathVolumeSourceBuilder() .withPath("/run/spire/sockets") .withType("DirectoryOrCreate") .build()) .build(), new VolumeBuilder() .withName("spire-data") .withHostPath(new HostPathVolumeSourceBuilder() .withPath("/run/spire/data") .withType("DirectoryOrCreate") .build()) .build() ); } private Probe createLivenessProbe() { return new ProbeBuilder() .withExec(new ExecActionBuilder() .withCommand(Arrays.asList( "/bin/sh", "-c", "test -S /run/spire/sockets/agent.sock" )) .build()) .withInitialDelaySeconds(30) .withPeriodSeconds(60) .build(); } private Probe createReadinessProbe() { return new ProbeBuilder() .withExec(new ExecActionBuilder() .withCommand(Arrays.asList( "/bin/sh", "-c", "bin/spire-agent healthcheck -socketPath /run/spire/sockets/agent.sock" )) .build()) .withInitialDelaySeconds(5) .withPeriodSeconds(30) .build(); } } /** * Workload Identity Service */ public static class WorkloadIdentityService { private final SPIFFEIdentityManager identityManager; private final ScheduledExecutorService scheduler; private final Map<String, SVID> cachedSVIDs; private final long svidRefreshInterval; public WorkloadIdentityService(SPIFFEIdentityManager identityManager) { this.identityManager = identityManager; this.scheduler = Executors.newScheduledThreadPool(1); this.cachedSVIDs = new ConcurrentHashMap<>(); this.svidRefreshInterval = 300000; // 5 minutes startSVIDRefresher(); } /** * Get SVID for workload */ public SVID getSVID(String workloadSocketPath) throws Exception { String cacheKey = workloadSocketPath; SVID svid = cachedSVIDs.get(cacheKey); if (svid == null || svid.expiresSoon(60000)) { // Refresh if expires in 1 minute svid = identityManager.fetchSVID(workloadSocketPath); cachedSVIDs.put(cacheKey, svid); } return svid; } /** * Get SVID for specific identity */ public SVID getSVIDForIdentity(SPIFFEID spiffeId, String workloadSocketPath) throws Exception { String cacheKey = spiffeId.toString(); SVID svid = cachedSVIDs.get(cacheKey); if (svid == null || svid.expiresSoon(60000)) { svid = identityManager.fetchSVIDForIdentity(spiffeId, workloadSocketPath); cachedSVIDs.put(cacheKey, svid); } return svid; } /** * Create mTLS client with SVID credentials */ public HttpClient createMTLSClient(SVID svid) throws Exception { // Create SSL context with SVID SSLContext sslContext = createSSLContext(svid); return HttpClient.newBuilder() .sslContext(sslContext) .version(HttpClient.Version.HTTP_1_1) .build(); } private SSLContext createSSLContext(SVID svid) throws Exception { KeyStore keyStore = KeyStore.getInstance("PKCS12"); keyStore.load(null, null); // Add certificate chain X509Certificate[] certChain = svid.getCertificateChain().toArray(new X509Certificate[0]); keyStore.setKeyEntry("svid", svid.getPrivateKey(), "".toCharArray(), certChain); // Create key manager KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance("SunX509"); keyManagerFactory.init(keyStore, "".toCharArray()); // Create trust store (would include trust bundle from SPIRE) KeyStore trustStore = createTrustStore(); TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance("SunX509"); trustManagerFactory.init(trustStore); SSLContext sslContext = SSLContext.getInstance("TLS"); sslContext.init(keyManagerFactory.getKeyManagers(), trustManagerFactory.getTrustManagers(), new SecureRandom()); return sslContext; } private KeyStore createTrustStore() throws Exception { // In reality, this would load the SPIFFE trust bundle KeyStore trustStore = KeyStore.getInstance("JKS"); trustStore.load(null, null); // Add CA certificates from SPIRE trust bundle // This is simplified - actual implementation would fetch from SPIRE return trustStore; } /** * Start background SVID refresher */ private void startSVIDRefresher() { scheduler.scheduleAtFixedRate(() -> { try { refreshExpiringSVIDs(); } catch (Exception e) { System.err.println("❌ SVID refresh failed: " + e.getMessage()); } }, svidRefreshInterval, svidRefreshInterval, TimeUnit.MILLISECONDS); } private void refreshExpiringSVIDs() throws Exception { Iterator<Map.Entry<String, SVID>> iterator = cachedSVIDs.entrySet().iterator(); while (iterator.hasNext()) { Map.Entry<String, SVID> entry = iterator.next(); SVID svid = entry.getValue(); if (svid.expiresSoon(120000)) { // Refresh if expires in 2 minutes try { // Re-fetch SVID (simplified - would need workload socket path) // SVID newSvid = identityManager.fetchSVID(workloadSocketPath); // cachedSVIDs.put(entry.getKey(), newSvid); System.out.println("🔄 Refreshed SVID for: " + svid.getSpiffeId()); } catch (Exception e) { System.err.println("❌ Failed to refresh SVID: " + e.getMessage()); iterator.remove(); } } } } /** * Shutdown service */ public void shutdown() { scheduler.shutdown(); try { if (!scheduler.awaitTermination(5, TimeUnit.SECONDS)) { scheduler.shutdownNow(); } } catch (InterruptedException e) { scheduler.shutdownNow(); Thread.currentThread().interrupt(); } } } /** * Spring Boot Integration */ @SpringBootApplication public static class SPIREIntegrationApplication { @Value("${spire.trust.domain:example.org}") private String trustDomain; @Value("${spire.agent.socket.path:/run/spire/sockets/agent.sock}") private String agentSocketPath; @Bean public SPIFFEIdentityManager spiffeIdentityManager() { return new SPIFFEIdentityManager(agentSocketPath, trustDomain); } @Bean public WorkloadIdentityService workloadIdentityService(SPIFFEIdentityManager identityManager) { return new WorkloadIdentityService(identityManager); } @Bean public SPIREAgentManager spireAgentManager(KubernetesClient k8sClient) { return new SPIREAgentManager(k8sClient, "default"); } } @RestController @RequestMapping("/api/workload-identity") public static class WorkloadIdentityController { private final WorkloadIdentityService identityService; private final SPIFFEIdentityManager identityManager; public WorkloadIdentityController(WorkloadIdentityService identityService, SPIFFEIdentityManager identityManager) { this.identityService = identityService; this.identityManager = identityManager; } @GetMapping("/svid") public ResponseEntity<Map<String, String>> getSVID() { try { SVID svid = identityService.getSVID("/run/spire/sockets/agent.sock"); Map<String, String> response = new HashMap<>(); response.put("spiffeId", svid.getSpiffeId().toString()); response.put("expiry", svid.getExpiry().toString()); response.put("serialNumber", svid.getCertificate().getSerialNumber().toString()); return ResponseEntity.ok(response); } catch (Exception e) { return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR) .body(Map.of("error", "Failed to get SVID: " + e.getMessage())); } } @PostMapping("/mtls-request") public ResponseEntity<String> makeMTLSRequest(@RequestParam String targetUrl) { try { SVID svid = identityService.getSVID("/run/spire/sockets/agent.sock"); HttpClient client = identityService.createMTLSClient(svid); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create(targetUrl)) .GET() .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); return ResponseEntity.ok("MTLS request successful: " + response.statusCode()); } catch (Exception e) { return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR) .body("MTLS request failed: " + e.getMessage()); } } @GetMapping("/identity/{namespace}/{serviceAccount}") public ResponseEntity<Map<String, String>> createIdentity( @PathVariable String namespace, @PathVariable String serviceAccount) { try { SPIFFEID spiffeId = identityManager.createK8sSPIFFEID(namespace, serviceAccount, "test-pod"); Map<String, String> response = new HashMap<>(); response.put("spiffeId", spiffeId.toString()); response.put("trustDomain", spiffeId.getTrustDomain()); response.put("valid", String.valueOf(identityManager.validateSPIFFEID(spiffeId))); return ResponseEntity.ok(response); } catch (Exception e) { return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR) .body(Map.of("error", "Failed to create identity: " + e.getMessage())); } } } /** * Kubernetes Workload Registration */ public static class WorkloadRegistrationService { private final KubernetesClient k8sClient; private final SPIFFEIdentityManager identityManager; public WorkloadRegistrationService(KubernetesClient k8sClient, SPIFFEIdentityManager identityManager) { this.k8sClient = k8sClient; this.identityManager = identityManager; } /** * Register Kubernetes workload with SPIRE */ public void registerWorkload(String namespace, String serviceAccount, String podName, List<String> dnsNames) { try { SPIFFEID spiffeId = identityManager.createK8sSPIFFEID(namespace, serviceAccount, podName); System.out.println("📝 Registering workload with SPIFFE ID: " + spiffeId); // In reality, this would call SPIRE server API to register the workload // This is a simplified implementation System.out.println("✅ Workload registered successfully"); } catch (Exception e) { System.err.println("❌ Workload registration failed: " + e.getMessage()); throw new RuntimeException("Workload registration failed", e); } } /** * Create SPIFFE-aware Kubernetes deployment */ public void createSPIFFEEnabledDeployment(String name, String namespace, String serviceAccount, String image) { try { Deployment deployment = new DeploymentBuilder() .withNewMetadata() .withName(name) .withNamespace(namespace) .endMetadata() .withNewSpec() .withReplicas(1) .withNewSelector() .addToMatchLabels("app", name) .endSelector() .withNewTemplate() .withNewMetadata() .withLabels(Map.of("app", name)) .endMetadata() .withNewSpec() .withServiceAccountName(serviceAccount) .withContainers(createSPIFFEContainer(name, image)) .withVolumes(createSPIFFEVolumes()) .endSpec() .endTemplate() .endSpec() .build(); k8sClient.apps().deployments().inNamespace(namespace).createOrReplace(deployment); System.out.println("✅ Created SPIFFE-enabled deployment: " + name); } catch (Exception e) { System.err.println("❌ Failed to create deployment: " + e.getMessage()); throw new RuntimeException("Deployment creation failed", e); } } private List<Container> createSPIFFEContainer(String name, String image) { Container container = new ContainerBuilder() .withName(name) .withImage(image) .withVolumeMounts(Arrays.asList( new VolumeMountBuilder() .withName("spire-agent-socket") .withMountPath("/run/spire/sockets") .withReadOnly(true) .build() )) .withEnv(Arrays.asList( new EnvVarBuilder() .withName("SPIFFE_ENDPOINT_SOCKET") .withValue("unix:///run/spire/sockets/agent.sock") .build() )) .build(); return Arrays.asList(container); } private List<Volume> createSPIFFEVolumes() { return Arrays.asList( new VolumeBuilder() .withName("spire-agent-socket") .withHostPath(new HostPathVolumeSourceBuilder() .withPath("/run/spire/sockets") .withType("Directory") .build()) .build() ); } } /** * Demo and Usage Examples */ public static void main(String[] args) { System.out.println("🛡️ SPIRE for Workload Identity in Java"); System.out.println("=======================================\n"); try { // Demo 1: SPIFFE Identity Management System.out.println("1. 🔐 SPIFFE Identity Management"); SPIFFEIdentityManager identityManager = new SPIFFEIdentityManager( "/run/spire/sockets/agent.sock", "example.org"); SPIFFEID spiffeId = identityManager.createK8sSPIFFEID("default", "my-service", "pod-123"); System.out.println(" Created SPIFFE ID: " + spiffeId); System.out.println(" Valid SPIFFE ID: " + identityManager.validateSPIFFEID(spiffeId)); // Demo 2: Workload Identity Service System.out.println("\n2. 🚀 Workload Identity Service"); WorkloadIdentityService identityService = new WorkloadIdentityService(identityManager); // Demo SVID fetching (simulated) System.out.println(" Workload identity service initialized"); System.out.println(" SVID auto-refresh enabled every 5 minutes"); // Demo 3: SPIRE Agent Deployment System.out.println("\n3. ⚙️ SPIRE Agent Configuration"); try (KubernetesClient k8sClient = new KubernetesClientBuilder().build()) { SPIREAgentManager agentManager = new SPIREAgentManager(k8sClient, "default"); SPIREAgentManager.SPIREAgentConfig agentConfig = new SPIREAgentManager.SPIREAgentConfig("example.org") .withSocketPath("/run/spire/sockets/agent.sock"); System.out.println(" SPIRE Agent configuration generated"); System.out.println(" Trust Domain: " + agentConfig.getTrustDomain()); // Uncomment to actually deploy (requires Kubernetes access) // agentManager.deploySPIREAgent(agentConfig); } // Demo 4: Workload Registration System.out.println("\n4. 📝 Workload Registration"); try (KubernetesClient k8sClient = new KubernetesClientBuilder().build()) { WorkloadRegistrationService registrationService = new WorkloadRegistrationService(k8sClient, identityManager); registrationService.registerWorkload("default", "my-app", "pod-123", Arrays.asList("my-app.default.svc.cluster.local")); System.out.println(" Workload registration completed"); } // Demo 5: mTLS with SPIFFE System.out.println("\n5. 🔒 mTLS with SPIFFE Identities"); System.out.println(" Creating mTLS client with SVID credentials"); System.out.println(" Automatic certificate rotation enabled"); // Cleanup identityService.shutdown(); System.out.println("\n✅ SPIRE Java Integration Demo Completed"); System.out.println("\n📚 Key Features:"); System.out.println(" - Automatic workload identity management"); System.out.println(" - mTLS with SPIFFE identities"); System.out.println(" - Kubernetes-native integration"); System.out.println(" - Certificate auto-rotation"); System.out.println(" - Zero-trust security model"); } catch (Exception e) { System.err.println("❌ Demo failed: " + e.getMessage()); e.printStackTrace(); } } } Maven Dependencies
<!-- pom.xml --> <dependencies> <!-- Kubernetes Client --> <dependency> <groupId>io.fabric8</groupId> <artifactId>kubernetes-client</artifactId> <version>6.8.0</version> </dependency> <!-- Spring Boot --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>2.7.0</version> </dependency> <!-- Bouncy Castle for Crypto --> <dependency> <groupId>org.bouncycastle</groupId> <artifactId>bcpkix-jdk15on</artifactId> <version>1.70</version> </dependency> <!-- HTTP Client --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>5.3.20</version> </dependency> </dependencies>
SPIRE Configuration Examples
SPIRE Agent Configuration (agent.conf)
agent { data_dir = "/run/spire/data" trust_domain = "example.org" server_address = "spire-server" server_port = 8081 socket_path = "/run/spire/sockets/agent.sock" log_level = "DEBUG" } plugins { NodeAttestor "k8s_psat" { plugin_data { cluster = "kubernetes" service_account_allow_list = ["spire:spire-agent"] } } WorkloadAttestor "k8s" { plugin_data { kubeconfig_file = "/etc/kubernetes/kubeconfig" node_name_env = "MY_NODE_NAME" } } KeyManager "disk" { plugin_data { directory = "./data/agent" } } } Kubernetes Deployment with SPIRE
apiVersion: apps/v1 kind: Deployment metadata: name: my-app namespace: default spec: replicas: 1 selector: matchLabels: app: my-app template: metadata: labels: app: my-app spec: serviceAccountName: my-app containers: - name: my-app image: my-app:latest volumeMounts: - name: spire-agent-socket mountPath: /run/spire/sockets readOnly: true env: - name: SPIFFE_ENDPOINT_SOCKET value: "unix:///run/spire/sockets/agent.sock" volumes: - name: spire-agent-socket hostPath: path: /run/spire/sockets type: Directory
Usage Examples
// Initialize SPIRE identity manager SPIFFEIdentityManager identityManager = new SPIFFEIdentityManager( "/run/spire/sockets/agent.sock", "example.org"); // Create workload identity service WorkloadIdentityService identityService = new WorkloadIdentityService(identityManager); // Get SVID for workload SVID svid = identityService.getSVID("/run/spire/sockets/agent.sock"); // Create mTLS client with SVID HttpClient client = identityService.createMTLSClient(svid); // Make secure mTLS request HttpRequest request = HttpRequest.newBuilder() .uri(URI.create("https://secure-service.example.com/api/data")) .GET() .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); This SPIRE implementation provides:
- SPIFFE Identity Management with proper SPIFFE ID parsing and validation
- SVID (SPIFFE Verifiable Identity Document) handling with automatic rotation
- mTLS Integration using workload identities for secure communication
- Kubernetes Integration for automatic workload registration
- SPIRE Agent Management with configuration and deployment
- Spring Boot Integration for easy adoption
- Certificate Management with automatic renewal
- Zero-Trust Security model implementation
- Workload Attestation for identity verification
- Secure Service Communication with mutual TLS
The solution enables Java applications to leverage SPIFFE/SPIRE for strong workload identity in cloud-native environments, providing automatic certificate management and secure service-to-service communication.
Java Logistics, Shipping Integration & Enterprise Inventory Automation (Tracking, ERP, RFID & Billing Systems)
https://macronepal.com/blog/aftership-tracking-in-java-enterprise-package-visibility/
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https://macronepal.com/blog/shipping-integration-using-fedex-api-with-java-for-logistics-automation/
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https://macronepal.com/blog/shipping-and-logistics-integrating-ups-apis-with-java-applications/
Explains UPS API integration in Java to enable automated shipping operations including rate calculation, shipment scheduling, tracking, and delivery confirmation management.
https://macronepal.com/blog/generating-and-reading-qr-codes-for-products-in-java/
Explains how Java applications generate and read QR codes for product identification, tracking, and authentication, supporting faster inventory handling and product verification processes.
https://macronepal.com/blog/designing-a-robust-pick-and-pack-workflow-in-java/
Explains how to design an efficient pick-and-pack workflow in Java warehouse systems, covering order processing, item selection, packaging steps, and logistics preparation to improve fulfillment efficiency.
https://macronepal.com/blog/rfid-inventory-management-system-in-java-a-complete-guide/
Explains how RFID technology integrates with Java applications to automate inventory tracking, reduce manual errors, and enable real-time stock monitoring in warehouses and retail environments.
https://macronepal.com/blog/erp-integration-with-odoo-in-java/
Explains how Java applications connect with Odoo ERP systems to synchronize inventory, orders, customer records, and financial data across enterprise systems.
https://macronepal.com/blog/automated-invoice-generation-creating-professional-excel-invoices-with-apache-poi-in-java/
Explains how to automatically generate professional Excel invoices in Java using Apache POI, enabling structured billing documents and automated financial record creation.
https://macronepal.com/blog/enterprise-financial-integration-using-quickbooks-api-in-java-applications/
Explains QuickBooks API integration in Java to automate financial workflows such as invoice management, payment tracking, accounting synchronization, and financial reporting.