GUACAMOLE-1809: Merge replacement of Spring with "IPAddress" library.

doc/licenses/ipaddress-5.4.0/README

@@ -0,0 +1,8 @@
+IPAddress (https://seancfoley.github.io/IPAddress/)
+---------------------------------------------------
+
+    Version: 5.4.0
+    From: 'Sean C Foley' (https://seancfoley.github.io/)
+    License(s):
+        Apache v2.0
+

doc/licenses/ipaddress-5.4.0/dep-coordinates.txt

@@ -0,0 +1 @@
+com.github.seancfoley:ipaddress:jar:5.4.0

doc/licenses/spring-framework-5.3.27/README

@@ -1,8 +0,0 @@
-Spring Framework (https://spring.io/projects/spring-framework)
---------------------------------------------------------------
-
-    Version: 5.3.27
-    From: 'Spring' (https://spring.io/)
-    License(s):
-        Apache v2.0
-

doc/licenses/spring-framework-5.3.27/dep-coordinates.txt

@@ -1,7 +0,0 @@
-org.springframework:spring-aop:jar:5.3.27
-org.springframework:spring-beans:jar:5.3.27
-org.springframework:spring-context:jar:5.3.27
-org.springframework:spring-core:jar:5.3.27
-org.springframework:spring-expression:jar:5.3.27
-org.springframework:spring-jcl:jar:5.3.27
-org.springframework:spring-web:jar:5.3.27

doc/licenses/spring-security-5.8.3/NOTICE

@@ -1,2 +0,0 @@
-This product includes software developed by Spring Security
-Project (https://www.springframework.org/security).

doc/licenses/spring-security-5.8.3/README

@@ -1,8 +0,0 @@
-Spring Security (https://spring.io/projects/spring-security)
-------------------------------------------------------------
-
-    Version: 5.8.3
-    From: 'Spring' (https://spring.io/)
-    License(s):
-        Apache v2.0
-

doc/licenses/spring-security-5.8.3/dep-coordinates.txt

@@ -1,3 +0,0 @@
-org.springframework.security:spring-security-core:jar:5.8.3
-org.springframework.security:spring-security-crypto:jar:5.8.3
-org.springframework.security:spring-security-web:jar:5.8.3

extensions/guacamole-auth-json/pom.xml

@@ -73,11 +73,18 @@
             <scope>provided</scope>
         </dependency>
 
-        <!-- Spring security library (required for IP address matching) -->
+        <!-- IPAddress (required for IP address matching) -->
         <dependency>
-            <groupId>org.springframework.security</groupId>
+            <groupId>com.github.seancfoley</groupId>
-            <artifactId>spring-security-web</artifactId>
+            <artifactId>ipaddress</artifactId>
-            <version>5.8.3</version>
+            <version>5.4.0</version>
+        </dependency>
+
+        <!-- JUnit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
         </dependency>
 
     </dependencies>

extensions/guacamole-auth-json/src/main/java/org/apache/guacamole/auth/json/RequestValidationService.java

@@ -20,13 +20,13 @@
 package org.apache.guacamole.auth.json;
 
 import com.google.inject.Inject;
+import inet.ipaddr.IPAddressString;
 import java.util.ArrayList;
 import java.util.Collection;
 import javax.servlet.http.HttpServletRequest;
 import org.apache.guacamole.GuacamoleException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.security.web.util.matcher.IpAddressMatcher;
 
 /**
  * Service for testing the validity of received HTTP requests.
@@ -45,6 +45,17 @@ public class RequestValidationService {
     @Inject
     private ConfigurationService confService;
 
+    /**
+     * Constructor that enables passing of an instance of
+     * ConfigurationService. (Only used for unit testing)
+     *
+     * @param confService
+     *     The (mock) instance of ConfigurationService
+     */
+    public RequestValidationService(ConfigurationService confService) {
+        this.confService = confService;
+    }
+
     /**
      * Returns whether the given request can be used for authentication, taking
      * into account restrictions specified within guacamole.properties.
@@ -77,16 +88,11 @@ public class RequestValidationService {
             return true;
         }
 
-        // Build matchers for each trusted network
+        // Otherwise ensure that the remote address is part of a trusted network
-        Collection<IpAddressMatcher> matchers = new ArrayList<>(trustedNetworks.size());
+        for (String network : trustedNetworks) {
-        for (String network : trustedNetworks)
-            matchers.add(new IpAddressMatcher(network));
-
-        // Otherwise ensure at least one subnet matches
-        for (IpAddressMatcher matcher : matchers) {
 
             // Request is allowed if any subnet matches
-            if (matcher.matches(request)) {
+            if (new IPAddressString(network).contains(new IPAddressString(request.getRemoteAddr()))) {
                 logger.debug("Authentication request from \"{}\" is ALLOWED (matched subnet).", request.getRemoteAddr());
                 return true;
             }

extensions/guacamole-auth-json/src/test/java/org/apache/guacamole/auth/json/RequestValidationServiceTest.java

@@ -0,0 +1,452 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.
+ */
+
+package org.apache.guacamole.auth.json;
+
+import java.io.BufferedReader;
+import java.security.Principal;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Enumeration;
+import java.util.Locale;
+import java.util.Map;
+import java.util.regex.Pattern;
+import javax.servlet.http.Cookie;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpSession;
+import javax.servlet.ServletInputStream;
+import javax.servlet.RequestDispatcher;
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+/**
+ * Unit test for RequestValidationService. Verifies that only requests
+ * from trusted hosts are allowed to authenticate.
+ */
+public class RequestValidationServiceTest {
+
+    /**
+     * This class is used to mock ConfigurationService.
+     */
+    private class MockConfigurationService extends ConfigurationService {
+
+        /**
+         * List of networks to be trusted
+         */
+        private Collection<String> trustedNetworks;
+
+        /**
+         * Constructor that enables passing of a comma-separated list of
+         * trusted networks.
+         *
+         * @param trustedNetworks
+         *     The comma-separated list of trusted networks
+         */
+        private MockConfigurationService(String trustedNetworks) {
+            if (trustedNetworks == null || trustedNetworks.isEmpty())
+                this.trustedNetworks = Collections.<String>emptyList();
+            else
+                this.trustedNetworks = Arrays.asList(Pattern.compile(",\\s*").split(trustedNetworks));
+        }
+
+        @Override
+        public Collection<String> getTrustedNetworks() {
+            return trustedNetworks;
+        }
+
+    }
+
+    /**
+     * The instance of RequestValidationService to be tested.
+     */
+    private RequestValidationService requestService;
+
+    /**
+     * Method that returns a (mock) HttpServletRequest with the provided
+     * remote address.
+     *
+     * @param remoteAddr
+     *     The remote address of the request
+     */
+    private static HttpServletRequest mockHttpServletRequest(String remoteAddr) {
+
+        return new HttpServletRequest() {
+
+            @Override
+            public Object getAttribute(String name) {
+                return null;
+            }
+
+            @Override
+            public Enumeration<String> getAttributeNames() {
+                return null;
+            }
+
+            @Override
+            public String getAuthType() {
+                return null;
+            }
+
+            @Override
+            public String getCharacterEncoding() {
+                return null;
+            }
+
+            @Override
+            public int getContentLength() {
+                return 0;
+            }
+
+            @Override
+            public String getContentType() {
+                return null;
+            }
+
+            @Override
+            public String getContextPath() {
+                return null;
+            }
+
+            @Override
+            public Cookie[] getCookies() {
+                return null;
+            }
+
+            @Override
+            public long getDateHeader(String name) {
+                return 0;
+            }
+
+            @Override
+            public String getHeader(String name) {
+                return null;
+            }
+
+            @Override
+            public Enumeration<String> getHeaderNames() {
+                return null;
+            }
+
+            @Override
+            public Enumeration<String> getHeaders(String name) {
+                return null;
+            }
+
+            @Override
+            public ServletInputStream getInputStream() {
+                return null;
+            }
+
+            @Override
+            public int getIntHeader(String name) {
+                return 0;
+            }
+
+            @Override
+            public String getLocalAddr() {
+                return null;
+            }
+
+            @Override
+            public Locale getLocale() {
+                return null;
+            }
+
+            @Override
+            public Enumeration<Locale> getLocales() {
+                return null;
+            }
+
+            @Override
+            public String getLocalName() {
+                return null;
+            }
+
+            @Override
+            public int getLocalPort() {
+                return 0;
+            }
+
+            @Override
+            public String getMethod() {
+                return null;
+            }
+
+            @Override
+            public String getParameter(String name) {
+                return null;
+            }
+
+            @Override
+            public Map<String,String[]> getParameterMap() {
+                return null;
+            }
+
+            @Override
+            public Enumeration<String> getParameterNames() {
+                return null;
+            }
+
+            @Override
+            public String[] getParameterValues(String name) {
+                return null;
+            }
+
+            @Override
+            public String getPathInfo() {
+                return null;
+            }
+
+            @Override
+            public String getPathTranslated() {
+                return null;
+            }
+
+            @Override
+            public String getProtocol() {
+                return null;
+            }
+
+            @Override
+            public String getQueryString() {
+                return null;
+            }
+
+            @Override
+            public BufferedReader getReader() {
+                return null;
+            }
+
+            @Override
+            @Deprecated
+            public String getRealPath(String path) {
+                return null;
+            }
+
+            @Override
+            public String getRemoteAddr() {
+                return remoteAddr;
+            }
+
+            @Override
+            public String getRemoteHost() {
+                return null;
+            }
+
+            @Override
+            public int getRemotePort() {
+                return 0;
+            }
+
+            @Override
+            public String getRemoteUser() {
+                return null;
+            }
+
+            @Override
+            public RequestDispatcher getRequestDispatcher(String path) {
+                return null;
+            }
+
+            @Override
+            public String getRequestedSessionId() {
+                return null;
+            }
+
+            @Override
+            public String getRequestURI() {
+                return null;
+            }
+
+            @Override
+            public StringBuffer getRequestURL() {
+                return null;
+            }
+
+            @Override
+            public String getScheme() {
+                return null;
+            }
+
+            @Override
+            public String getServerName() {
+                return null;
+            }
+
+            @Override
+            public int getServerPort() {
+                return 0;
+            }
+
+            @Override
+            public String getServletPath() {
+                return null;
+            }
+
+            @Override
+            public HttpSession getSession() {
+                return null;
+            }
+
+            @Override
+            public HttpSession getSession(boolean create) {
+                return null;
+            }
+
+            @Override
+            public Principal getUserPrincipal() {
+                return null;
+            }
+
+            @Override
+            public boolean isRequestedSessionIdFromCookie() {
+                return false;
+            }
+
+            @Override
+            @Deprecated
+            public boolean isRequestedSessionIdFromUrl() {
+                return false;
+            }
+
+            @Override
+            public boolean isRequestedSessionIdFromURL() {
+                return false;
+            }
+
+            @Override
+            public boolean isRequestedSessionIdValid() {
+                return false;
+            }
+
+            @Override
+            public boolean isSecure() {
+                return false;
+            }
+
+            @Override
+            public boolean isUserInRole(String role) {
+                return false;
+            }
+
+            @Override
+            public void removeAttribute(String name) {
+                return;
+            }
+
+            @Override
+            public void setAttribute(String name, Object o) {
+                return;
+            }
+
+            @Override
+            public void setCharacterEncoding(String env) {
+                return;
+            }
+
+        };
+
+    };
+
+    /**
+     * Verifies that all hosts are allowed to authenticate when no
+     * trusted networks are specified.
+     */
+    @Test
+    public void testNoTrustedNetwork() {
+
+        requestService = new RequestValidationService(new MockConfigurationService(null));
+
+        try {
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("1.1.1.1")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("10.10.10.10")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("100.100.100.100")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("1:1:1:1:1:1:1:1")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("10:10:10:10:10:10:10:10")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("100:100:100:100:100:100:100:100")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("1000:1000:1000:1000:1000:1000:1000:1000")));
+        }
+        catch (AssertionError e) {
+            fail("A network was denied to authenticate even though no trusted networks were specified.");
+        }
+
+    }
+
+    /**
+     * Verifies that hosts from trusted networks are allowed to
+     * authenticate:
+     */
+    @Test
+    public void testTrustedNetwork() {
+
+        requestService = new RequestValidationService(new MockConfigurationService("10.0.0.0/8,127.0.0.0/8,172.16.0.0/12,192.168.0.0/16,1.2.3.4/32,::1/128,fc00::/7"));
+
+        try {
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("10.0.0.0")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("10.255.255.255")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("127.0.0.0")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("127.255.255.255")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("172.16.0.0")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("172.31.255.255")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("192.168.0.0")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("192.168.255.255")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("1.2.3.4")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("::1")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("fc00::")));
+            assertTrue(requestService.isAuthenticationAllowed(mockHttpServletRequest("fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")));
+        }
+        catch (AssertionError e) {
+            fail("A trusted network was denied to authenticate.");
+        }
+
+    }
+
+    /**
+     * Verifies that hosts outside trusted networks are not allowed to
+     * authenticate.
+     */
+    @Test
+    public void testUntrustedNetwork() {
+
+        requestService = new RequestValidationService(new MockConfigurationService("10.0.0.0/8,127.0.0.0/8,172.16.0.0/12,192.168.0.0/16,1.2.3.4/32,::1/128,fc00::/7"));
+
+        try {
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("9.255.255.255")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("11.0.0.0")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("126.255.255.255")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("128.0.0.0")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("172.15.255.255")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("172.32.0.0")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("192.167.255.255")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("192.169.0.0")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("1.2.3.3")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("1.2.3.5")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("::0")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("::2")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("fbff:ffff:ffff:ffff:ffff:ffff:ffff:ffff")));
+            assertFalse(requestService.isAuthenticationAllowed(mockHttpServletRequest("fe00::")));
+        }
+        catch (AssertionError e) {
+            fail("An untrusted network was allowed to authenticate.");
+        }
+
+    }
+
+}