CHARSET_RFC4648
CHARSET_RFC4648 = ABCDEFGHIJKLMNOPQRSTUVWXYZ234567
Base32 encoder / decoder
Class for encoding / decoding in Base32. Provides four standard character sets:
Default pad string is '='.
However, you can define your own character set and pad string during instantiation. In this case, the desired character set's length must be exactly 32 characters and the desired pad string's length must be exactly one character.