Hi，

attatch is the patch for this issue, please help review it.

issue link is https://github.com/pgpool/pgpool2/issues/129

I have verified it, the result as below:

[root@test1 bin]# ./pg_enc -p -P

db password: 

encryption key: 

PtFXv5keNmBzsARTtJduzw==

pool_passwd string: AESPtFXv5keNmBzsARTtJduzw==