Greater than 9 Public keys results in inability to delete any keys

[singlerider]

Using the Github public key import feature, I had 17 public keys for my user account. I tried to SSH back in and was given failure notices. After SSH-ing back in as root, then su singlerider, I tried to delete the numerous (and I thought perhaps duplicated) Public keys. To my horror, I was unable to, due to:

https://github.com/hashbang/hashbangctl/blob/master/bin/hashbangctl#L176

expecting a single string character to extract with ord(). I had to go to [email protected] -p 8893
and execute commands resembling:

docker exec -i slapd ldapmodify -D "cn=admin,dc=hashbang,dc=sh" -w $ldap_password << EOF
dn: uid=singlerider,ou=People,dc=hashbang,dc=sh
changetype: modify
delete: sshPublicKey
sshPublicKey: ssh-rsa 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 cardno:000605649986
EOF

one-by-one, ensuring hashbangctl was NOT open on my account, as that locks its state when I run the above command.

Another interesting side-effect was that, with greater than 9 public keys, a user is unable to log in to hashbang via ssh.