Whitespace only checkstyle rules around tokens

Whitespace rules are added to enforce spacing surrounding various tokens
to provide for a more consistent code style.

Signed-off-by: Jason Katonica <katonica@us.ibm.com>

Author: jasonkatonica

checkstyle.xml

@@ -2,7 +2,7 @@
 <!--
 ###############################################################################
 #
-# Copyright IBM Corp. 2023
+# Copyright IBM Corp. 2023, 2026
 #
 # This code is free software; you can redistribute it and/or modify it
 # under the terms provided by IBM in the LICENSE file that accompanied
@@ -41,5 +41,8 @@
         <module name="UnusedImports"/>
         <module name="UnusedLocalVariable"/>
         <module name="WhitespaceAfter"/>
+        <module name="WhitespaceAround">
+          <property name="allowEmptyConstructors" value="true"/>
+        </module>
     </module>
 </module>

src/main/java/com/ibm/crypto/plus/provider/AESCCMCipher.java

@@ -770,7 +770,7 @@ protected int engineUpdate(ByteBuffer input, ByteBuffer output) throws ShortBuff
     }
 
     private Runnable cleanOCKResources(byte[] Key, OCKContext ockContext) {
-        return() -> {
+        return () -> {
             try {
                 if (ockContext != null) {
                     CCMCipher.doCCM_cleanup(ockContext);

src/main/java/com/ibm/crypto/plus/provider/AESGCMCipher.java

@@ -1445,7 +1445,7 @@ private void resetVars(boolean afterFailure) {
     }
 
     private Runnable cleanOCKResources(PrimitiveWrapper.ByteArray Key) {
-        return() -> {
+        return () -> {
             try {
                 //JS00684 - Leave cleanup of internal variables to GCMCipher that caches them
                 if (Key.getValue() != null) {

src/main/java/com/ibm/crypto/plus/provider/AESKey.java

@@ -1,5 +1,5 @@
 /*
- * Copyright IBM Corp. 2023, 2025
+ * Copyright IBM Corp. 2023, 2026
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms provided by IBM in the LICENSE file that accompanied
@@ -157,12 +157,12 @@ private void checkDestroyed() {
     }
 
     private Runnable cleanOCKResources(byte[] key) {
-        return() -> {
+        return () -> {
             try {
                 if (key != null) {
                     Arrays.fill(key, (byte) 0x00);
                 }
-            } catch (Exception e){
+            } catch (Exception e) {
                 if (OpenJCEPlusProvider.getDebug() != null) {
                     OpenJCEPlusProvider.getDebug().println("An error occurred while cleaning : " + e.getMessage());
                     e.printStackTrace();

src/main/java/com/ibm/crypto/plus/provider/AESKeyWrapCipher.java

@@ -187,7 +187,7 @@ protected int engineGetOutputSize(int inputLen) {
         } else {
             result = Math.addExact(inputLen, 16);
         }
-        return (result < 0? 0:result);
+        return (result < 0 ? 0 : result);
     }
 
     @Override

src/main/java/com/ibm/crypto/plus/provider/ChaCha20Key.java

@@ -1,5 +1,5 @@
 /*
- * Copyright IBM Corp. 2023, 2025
+ * Copyright IBM Corp. 2023, 2026
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms provided by IBM in the LICENSE file that accompanied
@@ -160,12 +160,12 @@ private void checkDestroyed() {
     }
 
     private Runnable cleanOCKResources(byte[] key) {
-        return() -> {
+        return () -> {
             try {
                 if (key != null) {
                     Arrays.fill(key, (byte) 0x00);
                 }
-            } catch (Exception e){
+            } catch (Exception e) {
                 if (OpenJCEPlusProvider.getDebug() != null) {
                     OpenJCEPlusProvider.getDebug().println("An error occurred while cleaning : " + e.getMessage());
                     e.printStackTrace();

src/main/java/com/ibm/crypto/plus/provider/DESedeKey.java

@@ -1,5 +1,5 @@
 /*
- * Copyright IBM Corp. 2023, 2025
+ * Copyright IBM Corp. 2023, 2026
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms provided by IBM in the LICENSE file that accompanied
@@ -161,12 +161,12 @@ private void checkDestroyed() {
     }
 
     private Runnable cleanOCKResources(byte[] key) {
-        return() -> {
+        return () -> {
             try {
                 if (key != null) {
                     Arrays.fill(key, (byte) 0x00);
                 }
-            } catch (Exception e){
+            } catch (Exception e) {
                 if (OpenJCEPlusProvider.getDebug() != null) {
                     OpenJCEPlusProvider.getDebug().println("An error occurred while cleaning : " + e.getMessage());
                     e.printStackTrace();

src/main/java/com/ibm/crypto/plus/provider/ECDSASignature.java

@@ -133,7 +133,7 @@ protected void engineSetParameter(AlgorithmParameterSpec params)
             throw new InvalidAlgorithmParameterException(
                     "Parameters must be of type ECParameterSpec");
         }
-        java.security.interfaces.ECKey key = (this.privateKey == null? this.publicKey : this.privateKey);
+        java.security.interfaces.ECKey key = (this.privateKey == null ? this.publicKey : this.privateKey);
         if ((key != null) && !ECUtil.equals(ecparams, key.getParams())) {
             throw new InvalidAlgorithmParameterException(
                     "Signature params does not match key params");

src/main/java/com/ibm/crypto/plus/provider/ECKeyPairGenerator.java

@@ -25,7 +25,7 @@ public final class ECKeyPairGenerator extends KeyPairGeneratorSpi {
     private static final boolean legacyECdefault = Boolean.parseBoolean(System.getProperty(EC_LEGACY_DEFAULT_KEYSIZE));
 
     private OpenJCEPlusProvider provider = null;
-    private int keysize = legacyECdefault? 256 : 384;
+    private int keysize = legacyECdefault ? 256 : 384;
     private SecureRandom cryptoRandom = null;
     ECParameterSpec ecSpec;
     private ObjectIdentifier oid = null;

src/main/java/com/ibm/crypto/plus/provider/MLKEMImpl.java

@@ -109,7 +109,7 @@ public KEM.Encapsulated engineEncapsulate(int from, int to, String algorithm) {
             byte[] encapsulation = new byte[encapLen];
             byte[] secret = new byte[SECRETSIZE];
 
-            if (from < 0 || to > SECRETSIZE || ((to - from) < 0) || (from >= SECRETSIZE)){
+            if (from < 0 || to > SECRETSIZE || ((to - from) < 0) || (from >= SECRETSIZE)) {
                 throw new IndexOutOfBoundsException();
             }
             if (algorithm == null) {
@@ -191,7 +191,7 @@ public SecretKey engineDecapsulate(byte[] cipherText, int from, int to, String a
                 throws DecapsulateException {
             byte[] secret;
 
-            if (from < 0 || to > SECRETSIZE || ((to - from) < 0) || (from >= SECRETSIZE)){
+            if (from < 0 || to > SECRETSIZE || ((to - from) < 0) || (from >= SECRETSIZE)) {
                 throw new IndexOutOfBoundsException();
             }
             if (algorithm == null || cipherText == null) {