scd: binary data returned when sending direct APDU

[Alexandre Vaissière]

Hello,

I am trying to send arbitrary APDU commands via scd. When doing that I 
noticed that scd answers me with binary data. For example:

gpg-connect-agent
> scd apdu 00 A4 04 00 07 A0 00 00 05 27 21 01
D yZ��... <other binary data>
OK


As assuan protocol is supposed to transmit utf-8 encoded string data, I 
would have expected an hexified string as returned data (as the input 
data is). Is that a bug or the expected behaviour?


Thank you very much,
Alexandre.