Fix SpotBugs [ERROR] Medium:

org.apache.commons.codec.binary.BaseNCodec$AbstractBuilder.setEncodeTable(byte[])
may expose internal representation by storing an externally mutable
object into BaseNCodec$AbstractBuilder.encodeTable
[org.apache.commons.codec.binary.BaseNCodec$AbstractBuilder] At
BaseNCodec.java:[line 131] EI_EXPOSE_REP2

Author: garydgregory

src/changes/changes.xml

@@ -63,6 +63,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix PMD multiple UnnecessaryFullyQualifiedName in org.apache.commons.codec.digest.Blake3.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix PMD UnnecessaryFullyQualifiedName in org.apache.commons.codec.digest.Md5Crypt.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix PMD EmptyControlStatement in org.apache.commons.codec.language.Metaphone.</action>
+      <action type="fix" dev="ggregory" due-to="Gary Gregory">Fix SpotBugs [ERROR] Medium: org.apache.commons.codec.binary.BaseNCodec$AbstractBuilder.setEncodeTable(byte[]) may expose internal representation by storing an externally mutable object into BaseNCodec$AbstractBuilder.encodeTable [org.apache.commons.codec.binary.BaseNCodec$AbstractBuilder] At BaseNCodec.java:[line 131] EI_EXPOSE_REP2.</action>
       <!-- ADD -->
       <action type="add" dev="ggregory" due-to="Gary Gregory">Add HmacUtils.hmac(Path).</action>      
       <action type="add" dev="ggregory" due-to="Gary Gregory">Add HmacUtils.hmacHex(Path).</action>      

src/main/java/org/apache/commons/codec/binary/Base64.java

@@ -667,7 +667,8 @@ private Base64(final int lineLength, final byte[] lineSeparator, final byte padd
         if (encodeTable.length != STANDARD_ENCODE_TABLE.length) {
             throw new IllegalArgumentException("encodeTable must have exactly 64 entries.");
         }
-        this.isUrlSafe = encodeTable == URL_SAFE_ENCODE_TABLE;
+        // same array first or equal contents second
+        this.isUrlSafe = encodeTable == URL_SAFE_ENCODE_TABLE || Arrays.equals(encodeTable, URL_SAFE_ENCODE_TABLE);
         if (encodeTable == STANDARD_ENCODE_TABLE || this.isUrlSafe) {
             decodeTable = DECODE_TABLE;
             // No need of a defensive copy of an internal table.

src/main/java/org/apache/commons/codec/binary/BaseNCodec.java

@@ -128,7 +128,7 @@ public B setDecodingPolicy(final CodecPolicy decodingPolicy) {
          * @return {@code this} instance.
          */
         public B setEncodeTable(final byte... encodeTable) {
-            this.encodeTable = encodeTable != null ? encodeTable : defaultEncodeTable;
+            this.encodeTable = encodeTable != null ? encodeTable.clone() : defaultEncodeTable;
             return asThis();
         }