Adding negative tests.

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org/wso2/carbon/apimgt/handlers/AuthenticationHandler.java

@@ -72,8 +72,8 @@ public class AuthenticationHandler extends AbstractHandler {
     /**
      * Handling the message and checking the security.
      *
-     * @param messageContext
+     * @param messageContext Request message context.
-     * @return
+     * @return Boolean value of the result of the processing the request.
      */
     @Override
     public boolean handleRequest(org.apache.synapse.MessageContext messageContext) {
@@ -87,7 +87,7 @@ public class AuthenticationHandler extends AbstractHandler {
         Map<String, String> headers = (Map<String, String>) axisMC.getProperty(MessageContext.TRANSPORT_HEADERS);
         try {
             int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
-            RESTResponse response;
+            RESTResponse response = null;
             if (headers.containsKey(AuthConstants.MDM_SIGNATURE)) {
 
                 String mdmSignature = headers.get(AuthConstants.MDM_SIGNATURE);
@@ -95,7 +95,7 @@ public class AuthenticationHandler extends AbstractHandler {
                     log.debug("Verify Cert:\n" + mdmSignature);
                 }
                 String deviceType = this.getDeviceType(messageContext.getTo().getAddress().trim());
-                if (deviceType == null){
+                if (deviceType == null) {
                     return false;
                 }
                 URI certVerifyUrl = new URI(iotServerConfiguration.getVerificationEndpoint() + deviceType);
@@ -108,8 +108,7 @@ public class AuthenticationHandler extends AbstractHandler {
 
                 Gson gson = new Gson();
                 String certVerifyContent = gson.toJson(certificate);
-                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, null,
+                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, certVerifyContent);
-                        null, certVerifyContent);
 
                 String str = response.getContent();
                 if (log.isDebugEnabled()) {
@@ -140,8 +139,7 @@ public class AuthenticationHandler extends AbstractHandler {
 
                 Gson gson = new Gson();
                 String certVerifyContent = gson.toJson(certificate);
-                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, null,
+                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, certVerifyContent);
-                        null, certVerifyContent);
                 if (log.isDebugEnabled()) {
                     log.debug("Verify response:" + response.getContent());
                 }
@@ -155,8 +153,6 @@ public class AuthenticationHandler extends AbstractHandler {
                 if (x509 != null) {
                     headers.put(AuthConstants.PROXY_MUTUAL_AUTH_HEADER, CertificateGenerator.getCommonName(x509));
                     return true;
-                } else {
-                    response = null;
                 }
             } else if (headers.containsKey(AuthConstants.ENCODED_PEM)) {
                 String encodedPem = headers.get(AuthConstants.ENCODED_PEM);
@@ -173,8 +169,7 @@ public class AuthenticationHandler extends AbstractHandler {
                 certificate.setSerial("");
                 Gson gson = new Gson();
                 String certVerifyContent = gson.toJson(certificate);
-                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, null,
+                response = restInvoker.invokePOST(certVerifyUrl, certVerifyHeaders, certVerifyContent);
-                        null, certVerifyContent);
                 if (log.isDebugEnabled()) {
                     log.debug("Verify response:" + response.getContent());
                 }

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org/wso2/carbon/apimgt/handlers/invoker/RESTInvoker.java

@@ -17,11 +17,9 @@
  */
 package org.wso2.carbon.apimgt.handlers.invoker;
 
-import org.apache.commons.codec.binary.Base64;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.apache.http.Header;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.client.methods.*;
 import org.apache.http.entity.StringEntity;
@@ -32,7 +30,6 @@ import org.apache.http.util.EntityUtils;
 
 import java.io.IOException;
 import java.net.URI;
-import java.nio.charset.StandardCharsets;
 import java.util.Map;
 import java.util.Set;
 
@@ -63,7 +60,7 @@ public class RESTInvoker {
                 .setConnectionManager(connectionManager)
                 .setDefaultRequestConfig(defaultRequestConfig)
                 .build();
-        if(log.isDebugEnabled()){
+        if (log.isDebugEnabled()) {
             log.debug("REST client initialized with " +
                     "maxTotalConnection = " + maxTotalConnections +
                     "maxConnectionsPerRoute = " + maxTotalConnectionsPerRoute +
@@ -72,14 +69,11 @@ public class RESTInvoker {
 
     }
 
-    public RESTResponse invokePOST(URI uri, Map<String, String> requestHeaders, String username,
+    public RESTResponse invokePOST(URI uri, Map<String, String> requestHeaders, String payload) throws IOException {
-                                   String password, String payload) throws IOException {
 
         HttpPost httpPost = null;
         CloseableHttpResponse response = null;
-        Header[] headers;
         int httpStatus;
-        String contentType;
         String output;
         try {
             httpPost = new HttpPost(uri);
@@ -90,11 +84,9 @@ public class RESTInvoker {
                     httpPost.setHeader(header, requestHeaders.get(header));
                 }
             }
-            response = sendReceiveRequest(httpPost, username, password);
+            response = sendReceiveRequest(httpPost);
             output = IOUtils.toString(response.getEntity().getContent());
-            headers = response.getAllHeaders();
             httpStatus = response.getStatusLine().getStatusCode();
-            contentType = response.getEntity().getContentType().getValue();
             if (log.isDebugEnabled()) {
                 log.debug("Invoked POST " + uri.toString() +
                         " - Input payload: " + payload + " - Response message: " + output);
@@ -108,21 +100,11 @@ public class RESTInvoker {
                 httpPost.releaseConnection();
             }
         }
-        return new RESTResponse(contentType, output, headers, httpStatus);
+        return new RESTResponse(output, httpStatus);
     }
 
-    private CloseableHttpResponse sendReceiveRequest(HttpRequestBase requestBase, String username, String password)
+    private CloseableHttpResponse sendReceiveRequest(HttpRequestBase requestBase)
             throws IOException {
-        CloseableHttpResponse response;
+        return client.execute(requestBase);
-        if (username != null && !username.equals("") && password != null) {
-            String combinedCredentials = username + ":" + password;
-            byte[] encodedCredentials = Base64.encodeBase64(combinedCredentials.getBytes(StandardCharsets.UTF_8));
-            requestBase.addHeader("Authorization", "Basic " + new String(encodedCredentials));
-
-            response = client.execute(requestBase);
-        } else {
-            response = client.execute(requestBase);
-        }
-        return response;
     }
 }

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org/wso2/carbon/apimgt/handlers/invoker/RESTResponse.java

@@ -17,40 +17,25 @@
  */
 package org.wso2.carbon.apimgt.handlers.invoker;
 
-import org.apache.http.Header;
 
 /**
  * RESTResponse class holds the data retrieved from the HTTP invoke response.
  */
 public class RESTResponse {
-    private String contentType;
     private String content;
-    private Header[] headers;
     private int httpStatus;
 
     /**
      * Constructor
      *
-     * @param contentType from the REST invoke response
      * @param content     from the REST invoke response
-     * @param headers     from the REST invoke response
      * @param httpStatus  from the REST invoke response
      */
-    RESTResponse(String contentType, String content, Header[] headers, int httpStatus) {
+    RESTResponse(String content, int httpStatus) {
-        this.contentType = contentType;
         this.content = content;
-        this.headers = headers;
         this.httpStatus = httpStatus;
     }
 
-    /**
-     * Get the content type of the EST invoke response
-     *
-     * @return String content type of the response
-     */
-    public String getContentType() {
-        return contentType;
-    }
 
     /**
      * Get contents of the REST invoke response
@@ -61,15 +46,6 @@ public class RESTResponse {
         return content;
     }
 
-    /**
-     * Get headers of the REST invoke response
-     *
-     * @return headers of the REST invoke response
-     */
-    public Header[] getHeaders() {
-        return headers;
-    }
-
     /**
      * Get the HTTP Status code from REST invoke response
      *

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/main/java/org/wso2/carbon/apimgt/handlers/utils/Utils.java

@@ -59,6 +59,7 @@ public class Utils {
 
     /**
      * This method initializes the iot-api-config.xml file.
+     *
      * @return IoTServerConfiguration Object based on the configuration file.
      */
     public static IOTServerConfiguration initConfig() {
@@ -67,10 +68,11 @@ public class Utils {
 
     /**
      * This methods initialized the iot-api-config.xml from provided path.
+     *
      * @param path The actual file path of iot-api-config.xml
      * @return The instance of the IOTServerConfiguration based on the configuration.
      */
-    public static IOTServerConfiguration initConfig(String path){
+    public static IOTServerConfiguration initConfig(String path) {
         try {
             File file = new File(path);
             Document doc = Utils.convertToDocument(file);
@@ -145,15 +147,15 @@ public class Utils {
                 getClientSecretes(iotServerConfiguration, restInvoker);
             }
             URI tokenUrl = new URI(iotServerConfiguration.getOauthTokenEndpoint());
-            String tokenContent = "grant_type=password&username=" + iotServerConfiguration.getUsername()+ "&password=" +
+            String tokenContent = "grant_type=password&username=" + iotServerConfiguration.getUsername() + "&password=" +
                     iotServerConfiguration.getPassword() + "&scope=activity-view";
             String tokenBasicAuth = "Basic " + Base64.encode((clientId + ":" + clientSecret).getBytes());
             Map<String, String> tokenHeaders = new HashMap<>();
             tokenHeaders.put("Authorization", tokenBasicAuth);
             tokenHeaders.put("Content-Type", "application/x-www-form-urlencoded");
 
-            RESTResponse response = restInvoker.invokePOST(tokenUrl, tokenHeaders, null, null, tokenContent);
+            RESTResponse response = restInvoker.invokePOST(tokenUrl, tokenHeaders, tokenContent);
-            if(log.isDebugEnabled()) {
+            if (log.isDebugEnabled()) {
                 log.debug("Token response:" + response.getContent());
             }
             JSONObject jsonResponse = new JSONObject(response.getContent());
@@ -168,6 +170,7 @@ public class Utils {
 
     /**
      * This method register an application to get the client key and secret.
+     *
      * @param iotServerConfiguration Instance of the IoTServerConfiguration.
      * @throws APIMCertificateMGTException
      */
@@ -189,7 +192,7 @@ public class Utils {
             dcrHeaders.put(AuthConstants.CONTENT_TYPE_HEADER, AuthConstants.CONTENT_TYPE);
             dcrHeaders.put(AuthConstants.AUTHORIZATION_HEADER, AuthConstants.BASIC_AUTH_PREFIX + basicAuth);
             URI dcrUrl = new URI(iotServerConfiguration.getDynamicClientRegistrationEndpoint());
-            RESTResponse response = restInvoker.invokePOST(dcrUrl, dcrHeaders, null, null, dcrContent);
+            RESTResponse response = restInvoker.invokePOST(dcrUrl, dcrHeaders, dcrContent);
             if (log.isDebugEnabled()) {
                 log.debug("DCR response :" + response.getContent());
             }

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/test/java/org/wso2/carbon/apimgt/handlers/AuthenticationHandlerTest.java

@@ -78,7 +78,7 @@ public class AuthenticationHandlerTest extends BaseAPIHandlerTest {
 
     @Test(description = "Handle request with without device type",
             dependsOnMethods = "testHandleRequestWithEmptyTransportHeader")
-    public void testHandleRequestWithURISyntaxError() throws Exception {
+    public void testHandleRequestWithoutDeviceType() throws Exception {
         HashMap<String, String> transportHeaders = new HashMap<>();
         transportHeaders.put(AuthConstants.MDM_SIGNATURE, "some cert");
         boolean response = this.handler.handleRequest(createSynapseMessageContext("<empty/>", this.synapseConfiguration,
@@ -87,7 +87,7 @@ public class AuthenticationHandlerTest extends BaseAPIHandlerTest {
     }
 
     @Test(description = "Handle request with device type URI with MDM ceritificate",
-            dependsOnMethods = "testHandleRequestWithURISyntaxError")
+            dependsOnMethods = "testHandleRequestWithoutDeviceType")
     public void testHandleSuccessfulRequestMDMCertificate() throws Exception {
         HashMap<String, String> transportHeaders = new HashMap<>();
         transportHeaders.put(AuthConstants.MDM_SIGNATURE, "some cert");
@@ -150,6 +150,70 @@ public class AuthenticationHandlerTest extends BaseAPIHandlerTest {
         this.mockClient.reset();
     }
 
+    @Test(description = "Handle request with device type URI with Encoded Pem with invalid response",
+            dependsOnMethods = "testHandleSuccessRequestEncodedPem")
+    public void testHandleSuccessRequestEncodedPemInvalidResponse() throws Exception {
+        HashMap<String, String> transportHeaders = new HashMap<>();
+        transportHeaders.put(AuthConstants.ENCODED_PEM, "encoded pem");
+        setMockClient();
+        this.mockClient.setResponse(getAccessTokenReponse());
+        this.mockClient.setResponse(getInvalidResponse());
+        MessageContext messageContext = createSynapseMessageContext("<empty/>", this.synapseConfiguration,
+                transportHeaders, "https://test.com/testservice/api/testdevice");
+        boolean response = this.handler.handleRequest(messageContext);
+        Assert.assertFalse(response);
+        this.mockClient.reset();
+    }
+
+    @Test(description = "Handle request with cert management exception ",
+            dependsOnMethods = "testHandleSuccessRequestEncodedPem")
+    public void testHandleRequestWithCertMgmtException() throws Exception {
+        HashMap<String, String> transportHeaders = new HashMap<>();
+        transportHeaders.put(AuthConstants.ENCODED_PEM, "encoded pem");
+        setMockClient();
+        this.mockClient.setResponse(null);
+        MessageContext messageContext = createSynapseMessageContext("<empty/>", this.synapseConfiguration,
+                transportHeaders, "https://test.com/testservice/api/testdevice");
+        boolean response = this.handler.handleRequest(messageContext);
+        Assert.assertFalse(response);
+        this.mockClient.reset();
+    }
+
+    @Test(description = "Handle request with IO exception",
+            dependsOnMethods = "testHandleRequestWithCertMgmtException")
+    public void testHandleRequestWithIOException() throws Exception {
+        HashMap<String, String> transportHeaders = new HashMap<>();
+        transportHeaders.put(AuthConstants.ENCODED_PEM, "encoded pem");
+        setMockClient();
+        this.mockClient.setResponse(getAccessTokenReponse());
+        this.mockClient.setResponse(null);
+        MessageContext messageContext = createSynapseMessageContext("<empty/>", this.synapseConfiguration,
+                transportHeaders, "https://test.com/testservice/api/testdevice");
+        boolean response = this.handler.handleRequest(messageContext);
+        Assert.assertFalse(response);
+        this.mockClient.reset();
+    }
+
+    @Test(description = "Handle request with URI exception",
+            dependsOnMethods = "testHandleRequestWithIOException")
+    public void testHandleRequestWithURIException() throws Exception {
+        TestUtils.resetSystemProperties();
+        HashMap<String, String> transportHeaders = new HashMap<>();
+        transportHeaders.put(AuthConstants.MDM_SIGNATURE, "some cert");
+        AuthenticationHandler handler = new AuthenticationHandler();
+        boolean response = handler.handleRequest(createSynapseMessageContext("<empty/>", this.synapseConfiguration,
+                transportHeaders, "https://test.com/testservice/api/testdevice"));
+        Assert.assertFalse(response);
+        TestUtils.setSystemProperties();
+    }
+
+    @Test(description = "Handle response")
+    public void testHandleResponse() throws Exception {
+        boolean response = this.handler.handleResponse(null);
+        Assert.assertTrue(response);
+    }
+
+
     private static MessageContext createSynapseMessageContext(
             String payload, SynapseConfiguration config, HashMap<String, String> transportHeaders,
             String address) throws Exception {
@@ -228,6 +292,16 @@ public class AuthenticationHandlerTest extends BaseAPIHandlerTest {
         return mockDCRResponse;
     }
 
+    private CloseableHttpResponse getInvalidResponse() throws UnsupportedEncodingException {
+        CloseableHttpResponse mockDCRResponse = new MockHttpResponse();
+        BasicHttpEntity responseEntity = new BasicHttpEntity();
+        responseEntity.setContent(new ByteArrayInputStream("invalid response".getBytes(StandardCharsets.UTF_8.name())));
+        responseEntity.setContentType(TestUtils.CONTENT_TYPE);
+        mockDCRResponse.setEntity(responseEntity);
+        mockDCRResponse.setStatusLine(new BasicStatusLine(new ProtocolVersion("http", 1, 0), 400, "Bad Request"));
+        return mockDCRResponse;
+    }
+
     private String getContent(String filePath) throws IOException {
         FileReader fileReader = new FileReader(filePath);
         BufferedReader bufferedReader = new BufferedReader(fileReader);

components/apimgt-extensions/org.wso2.carbon.apimgt.handlers/src/test/java/org/wso2/carbon/apimgt/handlers/mock/MockClient.java

@@ -41,7 +41,11 @@ public class MockClient extends CloseableHttpClient {
             throws IOException {
         if (this.responseCount < this.responses.size()) {
             this.responseCount++;
-            return this.responses.get(this.responseCount - 1);
+            CloseableHttpResponse response = this.responses.get(this.responseCount - 1);
+            if (response == null) {
+                throw new IOException("test exception");
+            }
+            return response;
         } else {
             return new MockHttpResponse();
         }