Can't use Password Digest on Z/OS

Base64.decode doesn't account for EBCDIC encoding.

line 281: byte[] base64Data = encoded.getBytes();

results in an array of garbage.

Then, line 307: b1 = base64Alphabet[base64Data[dataIndex++]];

causes an ArrayIndexOutOfBoundsException.

The result is that the PasswordDigest is blank.