Initial drop of rProxy code

The Reverse Proxy sidecar is used to separate the responsibility of
authentication and authorization away from the primary microservice. In
conjunction with the Forward Proxy sidecar, it is responsible for
controlling access to the REST URL endpoints exposed by the primary
microservice, and propogating security credentials to downstream
microservices.

Change-Id: I5d80429e5422d7b3937cde73ac10c2ec00d264e8
Issue-ID: AAI-1604
Signed-off-by: Lee, Tian (tl5884) <TianL@amdocs.com>

14 files changed, 1151 insertions, 0 deletions

diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyApplication.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyApplication.java
new file mode 100644
index 0000000..ebceceb
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyApplication.java
@@ -0,0 +1,182 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy;
+
+import java.io.IOException;
+import java.security.GeneralSecurityException;
+import java.util.HashMap;
+import java.util.Properties;
+import javax.annotation.PostConstruct;
+import javax.annotation.Resource;
+import javax.net.ssl.SSLContext;
+import org.apache.http.conn.ssl.NoopHostnameVerifier;
+import org.apache.http.impl.client.HttpClientBuilder;
+import org.apache.http.impl.client.HttpClients;
+import org.apache.http.ssl.SSLContextBuilder;
+import org.eclipse.jetty.util.security.Password;
+import org.onap.aaf.cadi.filter.CadiFilter;
+import org.onap.aaf.rproxy.config.ForwardProxyProperties;
+import org.onap.aaf.rproxy.config.PrimaryServiceProperties;
+import org.onap.aaf.rproxy.config.ReverseProxySSLProperties;
+import org.onap.aaf.rproxy.mocks.ReverseProxyMockCadiFilter;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.boot.web.servlet.RegistrationBean;
+import org.springframework.boot.web.servlet.ServletComponentScan;
+import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Profile;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.env.Environment;
+import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
+import org.springframework.util.ResourceUtils;
+import org.springframework.web.client.RestTemplate;
+
+@SpringBootApplication
+@ServletComponentScan
+@EnableConfigurationProperties(ReverseProxySSLProperties.class)
+@PropertySource("file:${CONFIG_HOME}/reverse-proxy.properties")
+public class ReverseProxyApplication extends SpringBootServletInitializer {
+
+    private static final String CADI_TRUSTSTORE_PASS = "cadi_truststore_password";
+
+    @Autowired
+    private Environment env;
+
+    /**
+     * Spring Boot Initialisation.
+     * 
+     * @param args main args
+     */
+    public static void main(String[] args) {
+        String keyStorePassword = System.getProperty("KEY_STORE_PASSWORD");
+        if (keyStorePassword == null || keyStorePassword.isEmpty()) {
+            throw new IllegalArgumentException("Env property KEY_STORE_PASSWORD not set");
+        }
+        HashMap<String, Object> props = new HashMap<>();
+        props.put("server.ssl.key-store-password", Password.deobfuscate(keyStorePassword));
+        new ReverseProxyApplication()
+                .configure(new SpringApplicationBuilder(ReverseProxyApplication.class).properties(props)).run(args);
+    }
+
+    /**
+     * Set required trust store system properties using values from application.properties
+     */
+    @PostConstruct
+    public void setSystemProperties() {
+        String keyStorePath = env.getProperty("server.ssl.key-store");
+        if (keyStorePath != null) {
+            String keyStorePassword = env.getProperty("server.ssl.key-store-password");
+
+            if (keyStorePassword != null) {
+                System.setProperty("javax.net.ssl.keyStore", keyStorePath);
+                System.setProperty("javax.net.ssl.keyStorePassword", keyStorePassword);
+                System.setProperty("javax.net.ssl.trustStore", keyStorePath);
+                System.setProperty("javax.net.ssl.trustStorePassword", keyStorePassword);
+            } else {
+                throw new IllegalArgumentException("Env property server.ssl.key-store-password not set");
+            }
+        }
+    }
+
+    @Resource
+    private ReverseProxySSLProperties reverseProxySSLProperties;
+
+    @Resource
+    Properties cadiProps;
+
+    @Bean(name = "ForwardProxyProperties")
+    public ForwardProxyProperties forwardProxyProperties() {
+        return new ForwardProxyProperties();
+    }
+
+    @Bean(name = "PrimaryServiceProperties")
+    public PrimaryServiceProperties primaryServiceProperties() {
+        return new PrimaryServiceProperties();
+    }
+
+    @Profile("secure")
+    @Bean
+    public RestTemplate restTemplate(RestTemplateBuilder builder) throws GeneralSecurityException, IOException {
+        return new RestTemplate(new HttpComponentsClientHttpRequestFactory(getClientBuilder().build()));
+    }
+
+    @Profile("noHostVerification")
+    @Bean
+    public RestTemplate restTemplateNoHostVerification(RestTemplateBuilder builder)
+            throws GeneralSecurityException, IOException {
+        return new RestTemplate(new HttpComponentsClientHttpRequestFactory(
+                getClientBuilder().setSSLHostnameVerifier(NoopHostnameVerifier.INSTANCE).build()));
+    }
+
+    private HttpClientBuilder getClientBuilder() throws GeneralSecurityException, IOException {
+
+        SSLContext sslContext = SSLContextBuilder.create()
+                .loadKeyMaterial(ResourceUtils.getFile(reverseProxySSLProperties.getClientcert()),
+                        reverseProxySSLProperties.getKeystorePassword().toCharArray(),
+                        reverseProxySSLProperties.getKeystorePassword().toCharArray())
+                .loadTrustMaterial(ResourceUtils.getFile(reverseProxySSLProperties.getKeystore()),
+                        reverseProxySSLProperties.getKeystorePassword().toCharArray())
+                .build();
+
+        return HttpClients.custom().setSSLContext(sslContext);
+    }
+
+    @Profile("cadi")
+    @Bean
+    public FilterRegistrationBean<CadiFilter> registerCADIFilter() {
+
+        FilterRegistrationBean<CadiFilter> filterRegistrationBean = new FilterRegistrationBean<>();
+
+        filterRegistrationBean.setFilter(new CadiFilter());
+        filterRegistrationBean.addUrlPatterns("/*");
+        filterRegistrationBean.setName("CADIFilter");
+        filterRegistrationBean.setOrder(RegistrationBean.HIGHEST_PRECEDENCE);
+
+        // Deobfuscate truststore password
+        String trustStorePassword = cadiProps.getProperty(CADI_TRUSTSTORE_PASS);
+        if (trustStorePassword != null) {
+            cadiProps.setProperty(CADI_TRUSTSTORE_PASS, Password.deobfuscate(trustStorePassword));
+        }
+
+        // Add filter init params
+        cadiProps.forEach((k, v) -> filterRegistrationBean.addInitParameter((String) k, (String) v));
+
+        return filterRegistrationBean;
+    }
+
+    @Profile("mockCadi")
+    @Bean
+    public FilterRegistrationBean<ReverseProxyMockCadiFilter> registerMockCADIFilter() {
+
+        FilterRegistrationBean<ReverseProxyMockCadiFilter> filterRegistrationBean = new FilterRegistrationBean<>();
+
+        filterRegistrationBean.setFilter(new ReverseProxyMockCadiFilter());
+        filterRegistrationBean.addUrlPatterns("/*");
+        filterRegistrationBean.setName("CADIFilter");
+        filterRegistrationBean.setOrder(RegistrationBean.HIGHEST_PRECEDENCE);
+
+        return filterRegistrationBean;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyAuthorizationFilter.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyAuthorizationFilter.java
new file mode 100644
index 0000000..6374c9d
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyAuthorizationFilter.java
@@ -0,0 +1,211 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy;
+
+import com.google.gson.Gson;
+import com.google.gson.stream.JsonReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.security.Principal;
+import java.util.ArrayList;
+import java.util.List;
+import javax.annotation.Resource;
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import org.eclipse.jetty.http.HttpStatus;
+import org.onap.aaf.cadi.CadiWrap;
+import org.onap.aaf.cadi.Permission;
+import org.onap.aaf.rproxy.config.ReverseProxyURIAuthorizationProperties;
+import org.onap.aaf.rproxy.utils.ReverseProxyAuthorization;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.core.annotation.Order;
+import org.springframework.stereotype.Component;
+
+@Component
+@Order(1)
+@EnableConfigurationProperties(ReverseProxyURIAuthorizationProperties.class)
+public class ReverseProxyAuthorizationFilter implements Filter {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ReverseProxyAuthorizationFilter.class);
+
+    private ReverseProxyAuthorization[] reverseProxyAuthorizations = new ReverseProxyAuthorization[] {};
+
+    @Resource
+    private ReverseProxyURIAuthorizationProperties reverseProxyURIAuthorizationProperties;
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+
+        // Read in the URI Authorisation configuration file
+        String authFilePath = reverseProxyURIAuthorizationProperties.getConfigurationFile();
+        if (authFilePath != null) {
+            try (InputStream inputStream =
+                    new FileInputStream(new File(reverseProxyURIAuthorizationProperties.getConfigurationFile()));
+                    JsonReader jsonReader = new JsonReader(new InputStreamReader(inputStream))) {
+                reverseProxyAuthorizations = new Gson().fromJson(jsonReader, ReverseProxyAuthorization[].class);
+            } catch (IOException e) {
+                throw new ServletException("Authorizations config file not found.", e);
+            }
+        }
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
+            throws IOException, ServletException {
+
+        CadiWrap cadiWrap = (CadiWrap) servletRequest;
+        Principal principal = cadiWrap.getUserPrincipal();
+        List<Permission> grantedPermissions = new ArrayList<>();
+        cadiWrap.getLur().fishAll(principal, grantedPermissions);
+
+        if (LOGGER.isDebugEnabled()) {
+            logNeededPermissions();
+        }
+
+        String requestPath;
+        try {
+            requestPath = new URI(((HttpServletRequest) servletRequest).getRequestURI()).getPath();
+        } catch (URISyntaxException e) {
+            throw new ServletException("Request URI not valid", e);
+        }
+
+        if (authorizeRequest(grantedPermissions, requestPath)) {
+            LOGGER.info("Authorized");
+            filterChain.doFilter(servletRequest, servletResponse);
+        } else {
+            LOGGER.info("Unauthorized");
+            ((HttpServletResponse) servletResponse).setStatus(HttpStatus.FORBIDDEN_403);
+            ((HttpServletResponse) servletResponse).setContentType("application/json");
+            ((HttpServletResponse) servletResponse).sendError(HttpStatus.FORBIDDEN_403,
+                    "Sorry, the request is not allowed");
+        }
+    }
+
+    /**
+     * Check if the granted permissions for the request path matches the configured needed permissions.
+     * 
+     * @param grantedPermissions The granted permissions for the request path
+     * @param requestPath The request path
+     * @return true if permissions match
+     */
+    private boolean authorizeRequest(List<Permission> grantedPermissions, String requestPath) {
+        boolean authorized = false;
+        for (ReverseProxyAuthorization reverseProxyAuthorization : reverseProxyAuthorizations) {
+            if (requestPath.matches(reverseProxyAuthorization.getUri())) {
+                LOGGER.debug("The URI:{}  matches:{}", requestPath, reverseProxyAuthorization.getUri());
+                if (checkPermissionsMatch(grantedPermissions, reverseProxyAuthorization)) {
+                    authorized = true;
+                    break;
+                }
+            } else {
+                LOGGER.debug("The URI:{} doesn't match any in the configuration:{}", requestPath,
+                        reverseProxyAuthorization.getUri());
+            }
+        }
+        return authorized;
+    }
+
+    /**
+     * Check all needed permissions match the granted permissions.
+     * 
+     * @param grantedPermissions the granted permissions
+     * @param reverseProxyAuthorization the bean that contains the needed permissions
+     * @return true if all needed permissions match
+     */
+    private boolean checkPermissionsMatch(List<Permission> grantedPermissions,
+            ReverseProxyAuthorization reverseProxyAuthorization) {
+
+        boolean matchedAllPermissions = true;
+        for (String neededPermission : reverseProxyAuthorization.getPermissions()) {
+
+            // Check needed permission is granted
+            boolean matchedNeededPermission = false;
+            for (Permission grantedPermission : grantedPermissions) {
+                if (checkGrantedPermission(neededPermission, grantedPermission.getKey())) {
+                    LOGGER.debug("Permission match found - needed permission:{}, granted permission:{}",
+                            neededPermission, grantedPermission.getKey());
+                    matchedNeededPermission = true;
+                    break;
+                }
+            }
+            if (!matchedNeededPermission) {
+                matchedAllPermissions = false;
+                break;
+            }
+        }
+        return matchedAllPermissions;
+    }
+
+    /**
+     * Check whether an AAF style permission matches a needed permission. Wildcards (*) are supported.
+     * 
+     * @param neededPermission, the needed permission
+     * @param grantedPermission, the granted permission
+     * 
+     * @return true if the needed permission matches a granted permission
+     */
+    private boolean checkGrantedPermission(String neededPermission, String grantedPermission) {
+        boolean permissionMatch = false;
+        if (grantedPermission.matches(neededPermission)) {
+            permissionMatch = true;
+        } else if (grantedPermission.contains("*")) {
+            String[] splitNeededPermission = neededPermission.split("\\\\\\|");
+            String[] splitGrantedPermission = grantedPermission.split("\\|");
+            if ((splitGrantedPermission[0].matches(splitNeededPermission[0]))
+                    && (splitGrantedPermission[1].equals("*")
+                            || splitGrantedPermission[1].matches(splitNeededPermission[1]))
+                    && (splitGrantedPermission[2].equals("*")
+                            || splitGrantedPermission[2].matches(splitNeededPermission[2]))) {
+                permissionMatch = true;
+            }
+        }
+        return permissionMatch;
+    }
+
+    /**
+     * Log the needed permissions for each URL configured.
+     */
+    private void logNeededPermissions() {
+        for (ReverseProxyAuthorization reverseProxyAuthorization : reverseProxyAuthorizations) {
+            LOGGER.debug("URI For authorization: {}", reverseProxyAuthorization.getUri());
+            for (String permission : reverseProxyAuthorization.getPermissions()) {
+                LOGGER.debug("\t Needed permission:{}", permission);
+            }
+        }
+    }
+
+    @Override
+    public void destroy() {
+        // No op
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyService.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyService.java
new file mode 100644
index 0000000..b5c000c
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/ReverseProxyService.java
@@ -0,0 +1,166 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy;
+
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.Enumeration;
+import java.util.UUID;
+import javax.annotation.Resource;
+import javax.servlet.http.HttpServletRequest;
+import org.onap.aaf.fproxy.data.CredentialCacheData;
+import org.onap.aaf.fproxy.data.CredentialCacheData.CredentialType;
+import org.onap.aaf.rproxy.config.ForwardProxyProperties;
+import org.onap.aaf.rproxy.config.PrimaryServiceProperties;
+import org.onap.aaf.rproxy.logging.ReverseProxyMethodLogTimeAnnotation;
+import org.onap.aaf.rproxy.utils.ReverseProxyUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.actuate.endpoint.InvalidEndpointRequestException;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+@RestController
+@EnableConfigurationProperties({ForwardProxyProperties.class, PrimaryServiceProperties.class})
+public class ReverseProxyService {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ReverseProxyService.class);
+
+    private String validatedTransactionId;
+
+    @Resource(name = "ForwardProxyProperties")
+    private ForwardProxyProperties forwardProxyProperties;
+
+    @Resource(name = "PrimaryServiceProperties")
+    private PrimaryServiceProperties primaryServiceProperties;
+
+    @Autowired
+    private RestTemplate restTemplate;
+
+    @Value("${transactionid.header.name}")
+    private String transactionIdHeader;
+
+    @RequestMapping("/**")
+    @ReverseProxyMethodLogTimeAnnotation
+    public ResponseEntity<String> handleRequest(HttpServletRequest request,
+            @RequestHeader(value = "${transactionid.header.name}", defaultValue = "") String transactionId,
+            @RequestBody(required = false) String requestBody, HttpMethod requestMethod) throws URISyntaxException {
+        validatedTransactionId = getValidTransactionId(transactionId);
+
+        // Extract Request Permissions and store in Forward Proxy cache
+        CredentialCacheData credentialCacheData = getCredentialDataFromRequest(request);
+        if (credentialCacheData != null) {
+            postCredentialsToCache(credentialCacheData);
+        }
+
+        // Call out to Primary Service & Return Response
+        URI requestURI = new URI(request.getRequestURI());
+
+        LOGGER.debug("Request URI: {}", request.getRequestURI());
+
+        // Get Request Endpoint & substitute in local values
+        URI primaryServiceURI = new URI(primaryServiceProperties.getProtocol(), requestURI.getUserInfo(),
+                primaryServiceProperties.getHost(), Integer.parseInt(primaryServiceProperties.getPort()),
+                requestURI.getPath(), requestURI.getQuery(), requestURI.getFragment());
+
+        LOGGER.debug("Primary Service URI:{}, HTTP Method: {}", primaryServiceURI, requestMethod);
+
+        HttpHeaders requestHeaders = setForwardedRequestHeaders(request);
+        HttpEntity<String> httpEntity = new HttpEntity<>(requestBody, requestHeaders);
+
+        return restTemplate.exchange(primaryServiceURI, requestMethod, httpEntity, String.class);
+    }
+
+    private String getValidTransactionId(String transactionId) {
+        LOGGER.debug("Request transaction ID: {}", transactionId);
+        if (transactionId == null || !ReverseProxyUtils.validTransactionId(transactionId)) {
+            transactionId = UUID.randomUUID().toString();
+        }
+        LOGGER.debug("Validated transaction ID: {}", transactionId);
+        return transactionId;
+    }
+
+    private HttpHeaders setForwardedRequestHeaders(HttpServletRequest httpServletRequest) {
+        HttpHeaders httpHeaders = new HttpHeaders();
+        Enumeration<String> headerNames = httpServletRequest.getHeaderNames();
+        while (headerNames.hasMoreElements()) {
+            String headerName = headerNames.nextElement();
+            if (!headerName.equals(transactionIdHeader)) {
+                httpHeaders.set(headerName, httpServletRequest.getHeader(headerName));
+            }
+        }
+        // Always set transaction ID
+        httpHeaders.set(transactionIdHeader, validatedTransactionId);
+
+        return httpHeaders;
+    }
+
+    /**
+     * Retrieves credential data from request.
+     * 
+     * @param request The request to retrieve credentials from
+     * @return The retrieved credential data, or null if no credentials are found in request
+     */
+    private CredentialCacheData getCredentialDataFromRequest(HttpServletRequest request) {
+        CredentialCacheData credentialCacheData = null;
+        String authValue = request.getHeader(HttpHeaders.AUTHORIZATION);
+        if (authValue != null) {
+            credentialCacheData = new CredentialCacheData(HttpHeaders.AUTHORIZATION, authValue, CredentialType.HEADER);
+        }
+        return credentialCacheData;
+    }
+
+    /**
+     * Posts credential data to credential cache endpoint
+     * 
+     * @param credentialCacheData The credential data to post
+     * @throws URISyntaxException
+     */
+    private void postCredentialsToCache(CredentialCacheData credentialCacheData) throws URISyntaxException {
+        URI forwardProxyURI = new URI(forwardProxyProperties.getProtocol(), null, forwardProxyProperties.getHost(),
+                forwardProxyProperties.getPort(), forwardProxyProperties.getCacheurl() + "/" + validatedTransactionId,
+                null, null);
+
+        ResponseEntity<String> response =
+                restTemplate.postForEntity(forwardProxyURI, credentialCacheData, String.class);
+
+        if (!response.getStatusCode().is2xxSuccessful()) {
+            throw new InvalidEndpointRequestException("Error posting to credential cache.",
+                    "Status code: " + response.getStatusCodeValue() + " Message: " + response.getBody());
+        }
+    }
+
+    @Override
+    public String toString() {
+        return this.getClass().getName() + ": Forward proxy host:" + forwardProxyProperties.getHost()
+                + ": Primary service host:" + primaryServiceProperties.getHost();
+
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/CadiProperties.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/CadiProperties.java
new file mode 100644
index 0000000..0afb506
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/CadiProperties.java
@@ -0,0 +1,41 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.config;
+
+import java.net.MalformedURLException;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.beans.factory.config.PropertiesFactoryBean;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.io.UrlResource;
+
+@Configuration
+public class CadiProperties {
+
+    @Value("${CONFIG_HOME}")
+    private String configHome;
+
+    @Bean(name = "cadiProps")
+    public PropertiesFactoryBean mapper() throws MalformedURLException {
+        PropertiesFactoryBean bean = new PropertiesFactoryBean();
+        bean.setLocation(new UrlResource("file:" + configHome + "/cadi.properties"));
+        return bean;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ForwardProxyProperties.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ForwardProxyProperties.java
new file mode 100644
index 0000000..3607797
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ForwardProxyProperties.java
@@ -0,0 +1,67 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.config;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource("file:${CONFIG_HOME}/forward-proxy.properties")
+@ConfigurationProperties(prefix = "forward-proxy")
+public class ForwardProxyProperties {
+
+    private String protocol;
+    private String host;
+    private int port;
+    private String cacheurl;
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+
+    public int getPort() {
+        return port;
+    }
+
+    public void setPort(int port) {
+        this.port = port;
+    }
+
+    public String getProtocol() {
+        return protocol;
+    }
+
+    public void setProtocol(String protocol) {
+        this.protocol = protocol;
+    }
+
+    public String getCacheurl() {
+        return cacheurl;
+    }
+
+    public void setCacheurl(String cacheurl) {
+        this.cacheurl = cacheurl;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/PrimaryServiceProperties.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/PrimaryServiceProperties.java
new file mode 100644
index 0000000..994dc55
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/PrimaryServiceProperties.java
@@ -0,0 +1,58 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.config;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+
+@Configuration
+@PropertySource("file:${CONFIG_HOME}/primary-service.properties")
+@ConfigurationProperties(prefix = "primary-service")
+public class PrimaryServiceProperties {
+
+    private String protocol;
+    private String host;
+    private String port;
+
+    public String getHost() {
+        return host;
+    }
+
+    public void setHost(String host) {
+        this.host = host;
+    }
+
+    public String getPort() {
+        return port;
+    }
+
+    public void setPort(String port) {
+        this.port = port;
+    }
+
+    public String getProtocol() {
+        return protocol;
+    }
+
+    public void setProtocol(String protocol) {
+        this.protocol = protocol;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxySSLProperties.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxySSLProperties.java
new file mode 100644
index 0000000..31e8a0d
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxySSLProperties.java
@@ -0,0 +1,56 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.config;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "server.ssl")
+public class ReverseProxySSLProperties {
+
+    private String keystore;
+    private String keystorePassword;
+    private String clientcert;
+
+    public String getKeystore() {
+        return keystore;
+    }
+
+    public void setKeystore(String keystore) {
+        this.keystore = keystore;
+    }
+
+    public String getClientcert() {
+        return clientcert;
+    }
+
+    public void setClientcert(String clientcert) {
+        this.clientcert = clientcert;
+    }
+
+    public String getKeystorePassword() {
+        return keystorePassword;
+    }
+
+    public void setKeystorePassword(String keystorePassword) {
+        this.keystorePassword = keystorePassword;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxyURIAuthorizationProperties.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxyURIAuthorizationProperties.java
new file mode 100644
index 0000000..da25d9c
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/config/ReverseProxyURIAuthorizationProperties.java
@@ -0,0 +1,38 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.config;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "uri.authorization")
+public class ReverseProxyURIAuthorizationProperties {
+
+    private String configurationFile;
+
+    public String getConfigurationFile() {
+        return configurationFile;
+    }
+
+    public void setConfigurationFile(String configurationFile) {
+        this.configurationFile = configurationFile;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyEntryExitLoggingAspect.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyEntryExitLoggingAspect.java
new file mode 100644
index 0000000..174420c
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyEntryExitLoggingAspect.java
@@ -0,0 +1,45 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.logging;
+
+import org.aspectj.lang.JoinPoint;
+import org.aspectj.lang.annotation.After;
+import org.aspectj.lang.annotation.Aspect;
+import org.aspectj.lang.annotation.Before;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+@Aspect
+@Component
+public class ReverseProxyEntryExitLoggingAspect {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ReverseProxyEntryExitLoggingAspect.class);
+
+    @Before("execution(* org.onap.platform.security.*.*(..))")
+    public void before(JoinPoint joinPoint) {
+        LOGGER.info("Entry of {}#{}", joinPoint.getTarget().getClass(), joinPoint.getSignature().getName());
+    }
+
+    @After("execution(* org.onap.platform.security.*.*(..))")
+    public void after(JoinPoint joinPoint) {
+        LOGGER.info("Exit of {}#{}", joinPoint.getTarget().getClass(), joinPoint.getSignature().getName());
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTime.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTime.java
new file mode 100644
index 0000000..00cfba6
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTime.java
@@ -0,0 +1,51 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.logging;
+
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Configuration;
+
+@Aspect
+@Configuration
+public class ReverseProxyMethodLogTime {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ReverseProxyMethodLogTime.class);
+
+    @Around("@annotation(org.onap.aaf.rproxy.logging.ReverseProxyMethodLogTimeAnnotation)")
+    public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
+
+        long startTime = System.currentTimeMillis();
+
+        Object object = joinPoint.proceed();
+
+        long duration = System.currentTimeMillis() - startTime;
+
+        LOGGER.info("Time taken by {} is {} ms", joinPoint, duration);
+
+        return object;
+    }
+
+
+
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTimeAnnotation.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTimeAnnotation.java
new file mode 100644
index 0000000..55f00f4
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/logging/ReverseProxyMethodLogTimeAnnotation.java
@@ -0,0 +1,30 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.logging;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ReverseProxyMethodLogTimeAnnotation {
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/mocks/ReverseProxyMockCadiFilter.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/mocks/ReverseProxyMockCadiFilter.java
new file mode 100644
index 0000000..10bfc3e
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/mocks/ReverseProxyMockCadiFilter.java
@@ -0,0 +1,143 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.mocks;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+import java.security.Principal;
+import java.util.List;
+import javax.servlet.Filter;
+import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServletRequest;
+import org.onap.aaf.cadi.CadiWrap;
+import org.onap.aaf.cadi.Lur;
+import org.onap.aaf.cadi.Permission;
+import org.onap.aaf.cadi.aaf.AAFPermission;
+import org.onap.aaf.cadi.principal.TaggedPrincipal;
+import org.onap.aaf.cadi.taf.TafResp;
+
+public class ReverseProxyMockCadiFilter implements Filter {
+
+    private FakeLur fakeLur = new FakeLur();
+
+    static class FakeLur implements Lur {
+
+		@Override
+		public void fishAll(Principal bait, List<Permission> permissions) {
+			
+			final String WildcardPermissionType = "test.wildcard.access";
+			final String MultiplePermissionType = "test.multiple.access";
+			final String TestAuthAccessPermissionType = "test.auth.access";
+			final String PermissionAction = "permission";
+
+			String principalName = bait.getName();
+
+			if (principalName != null && principalName.equals("UserWithInstanceActionWildcardPermissionGranted")) {
+				permissions.add(new AAFPermission(null, WildcardPermissionType, "*", "*"));
+			} 
+			else 
+			if (principalName != null && principalName.equals("UserWithInstanceWildcardPermissionGranted")) {
+				permissions.add(new AAFPermission(null, WildcardPermissionType, "*", PermissionAction));
+			} 
+			else 
+			if (principalName != null && principalName.equals("UserWithActionWildcardPermissionGranted")) {
+					permissions.add(new AAFPermission(null, WildcardPermissionType, "first", "*"));
+				}
+			else {
+
+				// For single permission test
+				permissions.add(new AAFPermission(null, "test.single.access", "single", PermissionAction));
+
+				// For multiple permission test
+				permissions.add(new AAFPermission(null, MultiplePermissionType, "first", PermissionAction));
+				permissions.add(new AAFPermission(null, MultiplePermissionType, "second", PermissionAction));
+				permissions.add(new AAFPermission(null, MultiplePermissionType, "third", PermissionAction));
+
+				// For transaction id test
+				permissions.add(new AAFPermission(null, TestAuthAccessPermissionType, "rest", "write"));
+				permissions.add(new AAFPermission(null, TestAuthAccessPermissionType, "rpc", "write"));
+			}
+		}
+
+        @Override
+        public Permission createPerm(String p) {
+            return null;
+        }
+
+        @Override
+        public boolean fish(Principal bait, Permission... pond) {
+            return false;
+        }
+
+        @Override
+        public void destroy() {
+            // Mock implementation
+        }
+
+        @Override
+        public boolean handlesExclusively(Permission... pond) {
+            return false;
+        }
+
+        @Override
+        public boolean handles(Principal principal) {
+            return false;
+        }
+
+        @Override
+        public void clear(Principal p, StringBuilder report) {
+            // Mock implementation
+        }
+
+    }
+
+    @Override
+    public void destroy() {
+        // Mock implementation
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
+            throws IOException, ServletException {
+    	
+    	String userName = ((HttpServletRequest)servletRequest).getHeader("PermissionsUser");
+
+        TaggedPrincipal mockTaggedPrincipal = mock(TaggedPrincipal.class);
+        when(mockTaggedPrincipal.getName()).thenReturn(userName);
+
+        TafResp tafResponseMock = mock(TafResp.class);
+        when(tafResponseMock.getPrincipal()).thenReturn(mockTaggedPrincipal);
+
+        CadiWrap cadiWrap = new CadiWrap((HttpServletRequest) servletRequest, tafResponseMock, fakeLur);
+        filterChain.doFilter(cadiWrap, servletResponse);
+    }
+
+    @Override
+    public void init(FilterConfig arg0) throws ServletException {
+        // Mock implementation
+    }
+
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyAuthorization.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyAuthorization.java
new file mode 100644
index 0000000..6c5baa2
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyAuthorization.java
@@ -0,0 +1,34 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.utils;
+
+public class ReverseProxyAuthorization {
+
+    private String uri;
+    private String[] permissions;
+
+    public String getUri() {
+        return uri;
+    }
+
+    public String[] getPermissions() {
+        return permissions;
+    }
+}
diff --git a/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyUtils.java b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyUtils.java
new file mode 100644
index 0000000..d2d1ba4
--- /dev/null
+++ b/sidecar/rproxy/src/main/java/org/onap/aaf/rproxy/utils/ReverseProxyUtils.java
@@ -0,0 +1,29 @@
+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aaf
+ * ================================================================================
+ * Copyright © 2018 European Software Marketing Ltd.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.aaf.rproxy.utils;
+
+public class ReverseProxyUtils {
+
+    public static boolean validTransactionId(String transactionId) {
+        return transactionId.matches("[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}");
+    }
+
+    private ReverseProxyUtils() {}
+}