Base32 constructor fails-fast with a NullPointerException if the custom

alphabet array is null

Author: garydgregory

src/changes/changes.xml

@@ -49,6 +49,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Optimize memory allocation in PhoneticEngine.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">BCodec and QCodec encode() methods throw UnsupportedCharsetException instead of EncoderException.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Set Javadoc link to latest Java API LTS version.</action>
+      <action type="fix" dev="ggregory" due-to="Gary Gregory">Base32 constructor fails-fast with a NullPointerException if the custom alphabet array is null.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Base32 constructor makes a defensive copy of the line separator array.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Base64 constructor makes a defensive copy of the line separator array.</action>
       <action type="fix" dev="ggregory" due-to="Gary Gregory">Base64 constructor makes a defensive copy of a custom alphabet array.</action>

src/main/java/org/apache/commons/codec/binary/Base32.java

@@ -17,6 +17,8 @@
 
 package org.apache.commons.codec.binary;
 
+import java.util.Objects;
+
 import org.apache.commons.codec.CodecPolicy;
 
 /**
@@ -353,6 +355,7 @@ public Base32(final int lineLength, final byte[] lineSeparator, final boolean us
      */
     private Base32(final int lineLength, final byte[] lineSeparator, final byte[] encodeTable, final byte padding, final CodecPolicy decodingPolicy) {
         super(BYTES_PER_UNENCODED_BLOCK, BYTES_PER_ENCODED_BLOCK, lineLength, toLength(lineSeparator), padding, decodingPolicy);
+        Objects.requireNonNull(encodeTable, "encodeTable");
         this.encodeTable = encodeTable;
         this.decodeTable = encodeTable == HEX_ENCODE_TABLE ? HEX_DECODE_TABLE : DECODE_TABLE;
         if (lineLength > 0) {