scan rules: Clean code tweaks

- Add static modifier where applicable.
- CHANGELOG > Add maintenance note (if there wasn't already one
present).
- pscanrules > Made resource message methods private again where example
alerts have been implemented, or removed them where there was only a
single usage (inlining the Contstant resource message usage).

addOns/ascanrules/CHANGELOG.md

@@ -4,7 +4,8 @@ All notable changes to this add-on will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## Unreleased
-
+### Changed
+- Maintenance changes.
 
 ## [67] - 2024-07-22
 

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/BufferOverflowScanRule.java

@@ -169,7 +169,7 @@ public int getWascId() {
         return 7;
     }
 
-    private String randomCharacterString(int length) {
+    private static String randomCharacterString(int length) {
         StringBuilder sb1 = new StringBuilder(length + 1);
         int counter = 0;
         int character = 0;

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/CommandInjectionScanRule.java

@@ -366,7 +366,7 @@ public int getRisk() {
         return Alert.RISK_HIGH;
     }
 
-    private String getOtherInfo(TestType testType, String testValue) {
+    private static String getOtherInfo(TestType testType, String testValue) {
         return Constant.messages.getString(
                 MESSAGE_PREFIX + "otherinfo." + testType.getNameKey(), testValue);
     }

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/DirectoryBrowsingScanRule.java

@@ -95,7 +95,7 @@ public String getReference() {
         return Constant.messages.getString(MESSAGE_PREFIX + "refs");
     }
 
-    private void checkIfDirectory(HttpMessage msg) throws URIException {
+    private static void checkIfDirectory(HttpMessage msg) throws URIException {
 
         URI uri = msg.getRequestHeader().getURI();
         uri.setQuery(null);

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/ExternalRedirectScanRule.java

@@ -342,7 +342,7 @@ private static boolean isRedirectHost(String value, boolean escaped) throws URIE
      * @param msg the current message where reflected redirection should be check into
      * @return get back the redirection type if exists
      */
-    private int isRedirected(String payload, HttpMessage msg) {
+    private static int isRedirected(String payload, HttpMessage msg) {
 
         // (1) Check if redirection by "Location" header
         // http://en.wikipedia.org/wiki/HTTP_location
@@ -471,7 +471,7 @@ private static boolean isRedirectPresent(Pattern pattern, String value) {
      * @param type the redirection type
      * @return a string representing the reason of this redirection
      */
-    private String getRedirectionReason(int type) {
+    private static String getRedirectionReason(int type) {
         switch (type) {
             case REDIRECT_LOCATION_HEADER:
                 return Constant.messages.getString(MESSAGE_PREFIX + "reason.location.header");

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/FormatStringScanRule.java

@@ -105,7 +105,7 @@ public String getReference() {
         return Constant.messages.getString(MESSAGE_PREFIX + "refs");
     }
 
-    private String getError(char c) {
+    private static String getError(char c) {
         return Constant.messages.getString(MESSAGE_PREFIX + "error" + c);
     }
 

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/PaddingOracleScanRule.java

@@ -267,7 +267,7 @@ private String getEmptyValueResponse(String paramName) throws IOException {
      * @param value the value that need to be checked
      * @return true if it seems to be encrypted
      */
-    private boolean isEncrypted(byte[] value) {
+    private static boolean isEncrypted(byte[] value) {
 
         // Make sure we have a reasonable sized string
         // (encrypted strings tend to be long, and short strings tend to break our numbers)

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/PathTraversalScanRule.java

@@ -608,7 +608,7 @@ private boolean sendAndCheckPayload(
         return false;
     }
 
-    private String getContentsToMatch(HttpMessage message) {
+    private static String getContentsToMatch(HttpMessage message) {
         return message.getResponseHeader().isHtml()
                 ? StringEscapeUtils.unescapeHtml4(message.getResponseBody().toString())
                 : message.getResponseHeader().toString() + message.getResponseBody().toString();
@@ -700,7 +700,7 @@ public String match(String contents) {
             return matchWinDirectories(contents);
         }
 
-        private String matchNixDirectories(String contents) {
+        private static String matchNixDirectories(String contents) {
             Pattern procPattern =
                     Pattern.compile("(?:^|\\W)proc(?:\\W|$)", Pattern.CASE_INSENSITIVE);
             Pattern etcPattern = Pattern.compile("(?:^|\\W)etc(?:\\W|$)", Pattern.CASE_INSENSITIVE);
@@ -727,7 +727,7 @@ private String matchNixDirectories(String contents) {
             return null;
         }
 
-        private String matchWinDirectories(String contents) {
+        private static String matchWinDirectories(String contents) {
             if (contents.contains("Windows")
                     && Pattern.compile("Program\\sFiles").matcher(contents).find()) {
                 return "Windows";

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/SourceCodeDisclosureWebInfScanRule.java

@@ -277,7 +277,7 @@ private HttpMessage createHttpMessage(URI uri) throws HttpMalformedHeaderExcepti
      * @return
      * @throws URIException
      */
-    private URI getClassURI(URI hostURI, String classname) throws URIException {
+    private static URI getClassURI(URI hostURI, String classname) throws URIException {
         return new URI(
                 hostURI.getScheme()
                         + "://"
@@ -288,7 +288,7 @@ private URI getClassURI(URI hostURI, String classname) throws URIException {
                 false);
     }
 
-    private URI getPropsFileURI(URI hostURI, String propsfilename) throws URIException {
+    private static URI getPropsFileURI(URI hostURI, String propsfilename) throws URIException {
         return new URI(
                 hostURI.getScheme()
                         + "://"

addOns/ascanrules/src/main/java/org/zaproxy/zap/extension/ascanrules/Spring4ShellScanRule.java

@@ -76,11 +76,11 @@ public String getDescription() {
         return Constant.messages.getString("ascanrules.spring4shell.desc");
     }
 
-    private boolean is400Response(HttpMessage msg) {
+    private static boolean is400Response(HttpMessage msg) {
         return !msg.getResponseHeader().isEmpty() && msg.getResponseHeader().getStatusCode() == 400;
     }
 
-    private void setGetPayload(HttpMessage msg, String payload) throws URIException {
+    private static void setGetPayload(HttpMessage msg, String payload) throws URIException {
         msg.getRequestHeader().setMethod("GET");
         URI uri = msg.getRequestHeader().getURI();
         String query = uri.getEscapedQuery();
@@ -92,7 +92,7 @@ private void setGetPayload(HttpMessage msg, String payload) throws URIException
         uri.setEscapedQuery(query);
     }
 
-    private void setPostPayload(HttpMessage msg, String payload) {
+    private static void setPostPayload(HttpMessage msg, String payload) {
         msg.getRequestHeader().setMethod("POST");
         String body = msg.getRequestBody().toString();
         if (body.isEmpty()

addOns/ascanrules/src/test/java/org/zaproxy/zap/extension/ascanrules/ExternalRedirectScanRuleUnitTest.java

@@ -80,11 +80,11 @@ private enum PayloadHandling {
         CONCAT_PATH
     };
 
-    private NanoServerHandler createHttpRedirectHandler(String path, String header) {
+    private static NanoServerHandler createHttpRedirectHandler(String path, String header) {
         return createHttpRedirectHandler(path, header, PayloadHandling.NEITHER);
     }
 
-    private NanoServerHandler createHttpRedirectHandler(
+    private static NanoServerHandler createHttpRedirectHandler(
             String path, String header, PayloadHandling payloadHandling) {
         return new NanoServerHandler(path) {
             @Override

addOns/ascanrules/src/test/java/org/zaproxy/zap/extension/ascanrules/HiddenFilesScanRuleUnitTest.java

@@ -110,7 +110,7 @@ void checkNoPathsHaveLeadingSlash() {
         }
     }
 
-    private void assertNoLeadingSlash(String message, String path) {
+    private static void assertNoLeadingSlash(String message, String path) {
         assertThat(message.replace(REPLACE_TOKEN, path), !path.startsWith("/"), is(true));
     }
 

addOns/ascanrules/src/test/java/org/zaproxy/zap/extension/ascanrules/XxeScanRuleUnitTest.java

@@ -314,7 +314,7 @@ void shouldAlertOnlyIfCertainTagValuesArePresent()
         assertThat(alert.getConfidence(), equalTo(Alert.CONFIDENCE_MEDIUM));
     }
 
-    private NanoServerHandler createNanoHandler(
+    private static NanoServerHandler createNanoHandler(
             String path, NanoHTTPD.Response.IStatus status, String responseBody) {
         return new NanoServerHandler(path) {
             @Override

addOns/ascanrulesAlpha/CHANGELOG.md

@@ -6,6 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ## Unreleased
 ### Changed
 - Update minimum ZAP version to 2.15.0.
+- Maintenance changes.
 
 ### Fixed
 - Alert text for various rules has been updated to more consistently use periods and spaces in a uniform manner.

addOns/ascanrulesAlpha/src/main/java/org/zaproxy/zap/extension/ascanrulesAlpha/ExampleFileActiveScanRule.java

@@ -80,10 +80,6 @@ public String getDescription() {
         return Constant.messages.getString(MESSAGE_PREFIX + "desc");
     }
 
-    private String getOtherInfo() {
-        return Constant.messages.getString(MESSAGE_PREFIX + "other");
-    }
-
     @Override
     public String getSolution() {
         return Constant.messages.getString(MESSAGE_PREFIX + "soln");
@@ -159,7 +155,7 @@ public void scan(HttpMessage msg, String param, String value) {
                             .setConfidence(Alert.CONFIDENCE_MEDIUM)
                             .setParam(param)
                             .setAttack(attack)
-                            .setOtherInfo(getOtherInfo())
+                            .setOtherInfo(Constant.messages.getString(MESSAGE_PREFIX + "other"))
                             .setEvidence(evidence)
                             .setMessage(testMsg)
                             .raise();
@@ -194,7 +190,7 @@ private String doesResponseContainString(HttpBody body, String str) {
         return null;
     }
 
-    private List<String> loadFile(String file) {
+    private static List<String> loadFile(String file) {
         /*
          * ZAP will have already extracted the file from the add-on and put it underneath the 'ZAP home' directory
          */

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/BackupFileDisclosureScanRule.java

@@ -426,7 +426,7 @@ public List<Alert> getExampleAlerts() {
                         .build());
     }
 
-    private boolean isEmptyResponse(byte[] response) {
+    private static boolean isEmptyResponse(byte[] response) {
         return response.length == 0;
     }
 

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/HttpParameterPollutionScanRule.java

@@ -242,7 +242,7 @@ public TreeSet<HtmlParameter> getParams(Source s, List<Element> inputTags) {
      * @param url found in the body of the targeted page
      * @return a hashmap of the query string
      */
-    private Map<String, List<String>> getUrlParameters(String url) {
+    private static Map<String, List<String>> getUrlParameters(String url) {
         Map<String, List<String>> params = new HashMap<>();
 
         if (url != null) {

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/IntegerOverflowScanRule.java

@@ -85,7 +85,7 @@ public String getReference() {
         return Constant.messages.getString(MESSAGE_PREFIX + "refs");
     }
 
-    private String getError(char c) {
+    private static String getError(char c) {
         return Constant.messages.getString(MESSAGE_PREFIX + "error" + c);
     }
 
@@ -145,7 +145,7 @@ public Map<String, String> getAlertTags() {
         return ALERT_TAGS;
     }
 
-    private String randomIntegerString(int length) {
+    private static String randomIntegerString(int length) {
 
         int numbercounter = 0;
         int character = 0;
@@ -169,7 +169,7 @@ private String randomIntegerString(int length) {
         return sb1.toString();
     }
 
-    private String singleString(int length, char c) // Single Character String
+    private static String singleString(int length, char c) // Single Character String
             {
 
         int numbercounter = 0;
@@ -241,7 +241,7 @@ private AlertBuilder buildAlert(
                 .setUri(url)
                 .setParam(param)
                 .setAttack(attack)
-                .setOtherInfo(this.getError(type))
+                .setOtherInfo(IntegerOverflowScanRule.getError(type))
                 .setEvidence(evidence);
     }
 }

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/ProxyDisclosureScanRule.java

@@ -752,7 +752,7 @@ public void scan() {
                                 Constant.messages.getString(
                                         MESSAGE_PREFIX + "desc",
                                         step2numberOfNodes - 1 + silentProxySet.size()))
-                        .setAttack(getAttack())
+                        .setAttack(Constant.messages.getString(MESSAGE_PREFIX + "attack"))
                         .setOtherInfo(extraInfo)
                         .setMessage(getBaseMsg())
                         .raise();
@@ -765,18 +765,14 @@ public void scan() {
         }
     }
 
-    private String getPath(URI uri) {
+    private static String getPath(URI uri) {
         String path = uri.getEscapedPath();
         if (path != null) {
             return path;
         }
         return "/";
     }
 
-    private String getAttack() {
-        return Constant.messages.getString(MESSAGE_PREFIX + "attack");
-    }
-
     @Override
     public int getRisk() {
         return Alert.RISK_MEDIUM;

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/RelativePathConfusionScanRule.java

@@ -645,7 +645,7 @@ private AlertBuilder buildAlert(String attack, String otherInfo, String evidence
                 .setEvidence(evidence);
     }
 
-    private Matcher matchStyles(String body) {
+    private static Matcher matchStyles(String body) {
         // remove all " and ' for proper matching url('somefile.png')
         String styleBody = body.replaceAll("['\"]", "");
         return STYLE_URL_LOAD.matcher(styleBody);

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/SessionFixationScanRule.java

@@ -1317,7 +1317,7 @@ private static void logSessionFixation(
      * @param cookieName
      * @return the HtmlParameter representing the cookie, or null if no matching cookie was found
      */
-    private HtmlParameter getResponseCookie(HttpMessage message, String cookieName) {
+    private static HtmlParameter getResponseCookie(HttpMessage message, String cookieName) {
         TreeSet<HtmlParameter> cookieBackParams = message.getResponseHeader().getCookieParams();
         if (cookieBackParams.isEmpty()) {
             // no cookies

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/SlackerCookieScanRule.java

@@ -212,7 +212,7 @@ private AlertBuilder createAlert(int risk, String otherInfo) {
         return newAlert().setRisk(risk).setConfidence(Alert.CONFIDENCE_LOW).setOtherInfo(otherInfo);
     }
 
-    private StringBuilder createOtherInfoText(
+    private static StringBuilder createOtherInfoText(
             Set<String> cookiesThatMakeADifference, Set<String> cookiesThatDoNOTMakeADifference) {
 
         StringBuilder otherInfoBuff =
@@ -228,15 +228,15 @@ private StringBuilder createOtherInfoText(
         return otherInfoBuff;
     }
 
-    private void listCookies(Set<String> cookieSet, StringBuilder otherInfoBuff) {
+    private static void listCookies(Set<String> cookieSet, StringBuilder otherInfoBuff) {
         Iterator<String> itYes = cookieSet.iterator();
         while (itYes.hasNext()) {
             formatCookiesList(otherInfoBuff, itYes);
         }
         otherInfoBuff.append(getEOL());
     }
 
-    private int calculateRisk(
+    private static int calculateRisk(
             Set<String> cookiesThatDoNOTMakeADifference, StringBuilder otherInfoBuff) {
         int riskLevel = Alert.RISK_INFO;
         for (String cookie : cookiesThatDoNOTMakeADifference) {
@@ -252,35 +252,36 @@ private int calculateRisk(
         return riskLevel;
     }
 
-    private String getSessionDestroyedText(String cookie) {
+    private static String getSessionDestroyedText(String cookie) {
         return Constant.messages.getString("ascanbeta.cookieslack.session.destroyed", cookie);
     }
 
-    private String getAffectResponseYes() {
+    private static String getAffectResponseYes() {
         return Constant.messages.getString("ascanbeta.cookieslack.affect.response.yes");
     }
 
-    private String getAffectResponseNo() {
+    private static String getAffectResponseNo() {
         return Constant.messages.getString("ascanbeta.cookieslack.affect.response.no");
     }
 
-    private String getSeparator() {
+    private static String getSeparator() {
         return Constant.messages.getString("ascanbeta.cookieslack.separator");
     }
 
-    private String getEOL() {
+    private static String getEOL() {
         return Constant.messages.getString("ascanbeta.cookieslack.endline");
     }
 
-    private void formatCookiesList(StringBuilder otherInfoBuff, Iterator<String> cookieIterator) {
+    private static void formatCookiesList(
+            StringBuilder otherInfoBuff, Iterator<String> cookieIterator) {
 
         otherInfoBuff.append(cookieIterator.next());
         if (cookieIterator.hasNext()) {
             otherInfoBuff.append(getSeparator());
         }
     }
 
-    private String getSessionCookieWarning(String cookie) {
+    private static String getSessionCookieWarning(String cookie) {
         return Constant.messages.getString("ascanbeta.cookieslack.session.warning", cookie);
     }
 

addOns/ascanrulesBeta/src/main/java/org/zaproxy/zap/extension/ascanrulesBeta/SourceCodeDisclosureFileInclusionScanRule.java

@@ -448,7 +448,7 @@ private boolean isEmptyOrTooSimilar(HttpMessage msg, int matchPercentage) {
      * @param fileExtension
      * @return
      */
-    private boolean dataMatchesExtension(byte[] data, String fileExtension) {
+    private static boolean dataMatchesExtension(byte[] data, String fileExtension) {
         if (fileExtension != null) {
             if (fileExtension.equals("JSP")) {
                 if (PATTERN_JSP.matcher(new String(data)).find()) return true;
@@ -502,7 +502,7 @@ public Map<String, String> getAlertTags() {
      * @param b
      * @return
      */
-    private int calcLengthMatchPercentage(int a, int b) {
+    private static int calcLengthMatchPercentage(int a, int b) {
         if (a == 0 && b == 0) return 100;
         if (a == 0 || b == 0) return 0;