ISC DHCP supports an ASCII or binary option type
ISC DHCP has two "string" types:
- t - ASCII text
- X - either an ASCII string or binary data. On input, the option can be specified either as a quoted string or as a colon-separated hex list.
Kea has string and binary, t matches string but X can be either string or binary. Now only one standard option has a trailing X so the implementation converts X to string (option-def) and when building data (option-data) converts full binary input to binary with csv-format to false. For trailing X add a comment saying that the last type should be changed to binary.
Unfortunately mostly for documentation purpose.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information