OF-830: Properly handle LDAP search filters

Updated LDAP components to escape special characters in user and group
search filters, including JID (un)escaping where appropriate

src/java/org/jivesoftware/openfire/ldap/LdapAuthorizationMapping.java

@@ -107,7 +107,8 @@ public class LdapAuthorizationMapping implements AuthorizationMapping {
             }
             constraints.setReturningAttributes(new String[] { usernameField });
 
-            NamingEnumeration answer = ctx.search("", princSearchFilter, new String[] {principal},
+            NamingEnumeration answer = ctx.search("", princSearchFilter, 
+            		new String[] {LdapManager.sanitizeSearchFilter(principal)},
                     constraints);
             Log.debug("LdapAuthorizationMapping: ... search finished");
             if (answer == null || !answer.hasMoreElements()) {

src/java/org/jivesoftware/openfire/ldap/LdapGroupProvider.java

@@ -165,7 +165,7 @@ public class LdapGroupProvider extends AbstractGroupProvider {
         StringBuilder filter = new StringBuilder();
         filter.append("(&");
         filter.append(MessageFormat.format(manager.getGroupSearchFilter(), "*"));
-        filter.append("(").append(key).append("=").append(value);
+        filter.append("(").append(key).append("=").append(LdapManager.sanitizeSearchFilter(value));
         filter.append("))");
         if (Log.isDebugEnabled()) {
             Log.debug("Trying to find group names using query: " + filter.toString());
@@ -188,13 +188,11 @@ public class LdapGroupProvider extends AbstractGroupProvider {
         if (query == null || "".equals(query)) {
             return Collections.emptyList();
         }
-        // Make the query be a wildcard search by default. So, if the user searches for
-        // "Test", make the search be "Test*" instead.
-        if (!query.endsWith("*")) {
-            query = query + "*";
-        }
         StringBuilder filter = new StringBuilder();
-        filter.append("(").append(manager.getGroupNameField()).append("=").append(query).append(")");
+        // Make the query be a wildcard search by default. So, if the user searches for
+        // "Test", make the sanitized search be "Test*" instead.
+        filter.append("(").append(manager.getGroupNameField()).append("=")
+        		.append(LdapManager.sanitizeSearchFilter(query)).append("*)");
         // Perform the LDAP query
         return manager.retrieveList(
                 manager.getGroupNameField(),

src/java/org/jivesoftware/openfire/ldap/LdapManager.java

@@ -20,6 +20,7 @@
 
 package org.jivesoftware.openfire.ldap;
 
+import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.text.MessageFormat;
 import java.util.ArrayList;
@@ -971,7 +972,8 @@ public class LdapManager {
             }
             constraints.setReturningAttributes(new String[] { usernameField });
 
-            NamingEnumeration<SearchResult> answer = ctx.search("", getSearchFilter(), new String[] {username},
+            NamingEnumeration<SearchResult> answer = ctx.search("", getSearchFilter(), 
+            		new String[] {sanitizeSearchFilter(username)},
                     constraints);
 
             if (debug) {
@@ -1115,7 +1117,7 @@ public class LdapManager {
             }
             constraints.setReturningAttributes(new String[] { groupNameField });
 
-            String filter = MessageFormat.format(getGroupSearchFilter(), groupname);
+            String filter = MessageFormat.format(getGroupSearchFilter(), sanitizeSearchFilter(JID.unescapeNode(groupname)));
             NamingEnumeration<SearchResult> answer = ctx.search("", filter, constraints);
 
             if (debug) {
@@ -2183,6 +2185,57 @@ public class LdapManager {
         return count;
     }
     
+    /**
+     * Escapes any special chars (RFC 4515) from a string representing
+     * a search filter assertion value.
+     *
+     * @param input The input string.
+     *
+     * @return A assertion value string ready for insertion into a 
+     *         search filter string.
+     */
+    public static String sanitizeSearchFilter(final String value) {
+
+            StringBuilder result = new StringBuilder();
+
+            for (int i=0; i< value.length(); i++) {
+
+                char c = value.charAt(i);
+
+                switch(c) {
+	            	case '!':		result.append("\\21");	break;
+	            	case '&':		result.append("\\26");	break;
+	            	case '(':		result.append("\\28");	break;
+	            	case ')':		result.append("\\29");	break;
+	            	case '*':		result.append("\\2a");	break;
+	            	case ':':		result.append("\\3a");	break;
+	            	case '\\':		result.append("\\5c");	break;
+	            	case '|':		result.append("\\7c");	break;
+	            	case '~':		result.append("\\7e");	break;
+	            	case '\u0000':	result.append("\\00");	break;
+            	default:
+            		if (c <= 0x7f) {
+                        // regular 1-byte UTF-8 char
+            			result.append(String.valueOf(c));
+                    }
+                    else if (c >= 0x080) { 
+                        // higher-order 2, 3 and 4-byte UTF-8 chars
+                        try {
+                            byte[] utf8bytes = String.valueOf(c).getBytes("UTF8");
+                            for (byte b: utf8bytes)
+                            {
+                            	result.append(String.format("\\%02x", b));
+                            }
+                        } catch (UnsupportedEncodingException e) {
+                            // ignore
+                        }
+            		}
+                }
+            }
+            return result.toString();
+    }
+    
+
     /**
      * Encloses DN values with "
      *

src/java/org/jivesoftware/openfire/ldap/LdapUserProvider.java

@@ -255,11 +255,6 @@ public class LdapUserProvider implements UserProvider {
         if (!searchFields.keySet().containsAll(fields)) {
             throw new IllegalArgumentException("Search fields " + fields + " are not valid.");
         }
-        // Make the query be a wildcard search by default. So, if the user searches for
-        // "John", make the search be "John*" instead.
-        if (!query.endsWith("*")) {
-            query = query + "*";
-        }
         StringBuilder filter = new StringBuilder();
         //Add the global search filter so only those users the directory administrator wants to include
         //are returned from the directory
@@ -271,7 +266,10 @@ public class LdapUserProvider implements UserProvider {
         }
         for (String field:fields) {
             String attribute = searchFields.get(field);
-            filter.append("(").append(attribute).append("=").append(query).append(")");
+            // Make the query be a wildcard search by default. So, if the user searches for
+            // "John", make the sanitized search be "John*" instead.
+            filter.append("(").append(attribute).append("=")
+            	.append(LdapManager.sanitizeSearchFilter(query)).append("*)");
         }
         if (fields.size() > 1) {
             filter.append(")");

src/test/java/org/jivesoftware/util/LDAPTest.java

@@ -9,11 +9,13 @@
  */
 package org.jivesoftware.util;
 
+import static org.junit.Assert.assertTrue;
+
+import javax.naming.ldap.Rdn;
+
 import org.jivesoftware.openfire.ldap.LdapManager;
 import org.junit.Test;
 
-import static org.junit.Assert.assertTrue;
-
 /**
  * @author Daniel Henninger
  */
@@ -36,4 +38,45 @@ public class LDAPTest {
         converted = LdapManager.getEnclosedDN(before);
         assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
     }
+
+    @Test
+    public void testRdnEscapeValue() {
+        String before = "Jive Software, Inc";
+        String after = "Jive Software\\, Inc";
+        String converted = Rdn.escapeValue(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+        
+        before = "Test.User; (+1)";
+        after = "Test.User\\; (\\+1)";
+        converted = Rdn.escapeValue(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+        
+        before = "Wildcard *";
+        after = "Wildcard *";
+        converted = Rdn.escapeValue(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+        
+        before = "Group/Section";
+        after = "Group/Section";
+        converted = Rdn.escapeValue(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+    }
+
+    @Test
+    public void testSanitizeSearchFilter() {
+        String before = "Test.User; (+1)";
+        String after = "Test.User; \\28+1\\29";
+        String converted = LdapManager.sanitizeSearchFilter(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+
+        before = "Wildcard *";
+        after = "Wildcard \\2a";
+        converted = LdapManager.sanitizeSearchFilter(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+        
+        before = "~ Group|Section & Teams!";
+        after = "\\7e Group\\7cSection \\26 Teams\\21";
+        converted = LdapManager.sanitizeSearchFilter(before);
+        assertTrue("Conversion result "+before+" to "+converted, converted.equals(after));
+    }
 }