Dem slapd das ldapPublicKey-Schema hinzufügen:
  apt-get install fusiondirectory-plugin-ssh-schema
  schema2ldif /etc/ldap/schema/fusiondirectory/openssh-lpk.schema > /etc/ldap/schema/fusiondirectory/openssh-lpk.ldif
(( 
<file txt>
#
# LDAP Public Key Patch schema for use with openssh-ldappubkey
# Author: Eric AUGE <eau@phear.org>
#
# Based on the proposal of : Mark Ruijter
#


# octetString SYNTAX
attributetype ( 1.3.6.1.4.1.24552.500.1.1.1.13 NAME 'sshPublicKey'
        DESC 'MANDATORY: OpenSSH Public key'
        EQUALITY octetStringMatch
        SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )

# printableString SYNTAX yes|no
objectclass ( 1.3.6.1.4.1.24552.500.1.1.2.0 NAME 'ldapPublicKey' SUP top AUXILIARY
        DESC 'MANDATORY: OpenSSH LPK objectclass'
        MAY ( sshPublicKey $ uid )
        )
</file>
<file ldif>
dn: cn=openssh-lpk,cn=schema,cn=config
objectClass: olcSchemaConfig
cn: openssh-lpk
#
# LDAP Public Key Patch schema for use with openssh-ldappubkey
# Author: Eric AUGE <eau@phear.org>
#
# Based on the proposal of : Mark Ruijter
#
# octetString SYNTAX
olcAttributeTypes: ( 1.3.6.1.4.1.24552.500.1.1.1.13 NAME 'sshPublicKey'
  DESC 'MANDATORY: OpenSSH Public key'
  EQUALITY octetStringMatch
  SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 )
# printableString SYNTAX yes|no
olcObjectClasses: ( 1.3.6.1.4.1.24552.500.1.1.2.0 NAME 'ldapPublicKey' SUP top AUXILIARY
  DESC 'MANDATORY: OpenSSH LPK objectclass'
  MAY ( sshPublicKey $ uid )
  )

</file>
))
  ldapadd -Y EXTERNAL -H ldapi:/// -f /etc/ldap/schema/fusiondirectory/openssh-lpk.ldif

Dem Benutzer den Schlüssel hinzufügen:

  cat <<LDIF > add-sshPublicKey.ldif

<file bash>
dn: uid=$USERNAME,ou=people,$DOMAIN
changeType: modify
add: objectClass
objectClass: ldapPublicKey
-
add: sshPublicKey
sshPublicKey: $(cat ~/.ssh/authorized_keys)
</file>
  LDIF

sssd konfigurieren:
<file txt /etc/sssd/sssd.conf>
…
[sssd]
…
services = nss, pam, ssh
…
</file>

  sssctl config-check
  service sssd restart

sshd konfigurieren:
<file txt /etc/ssh/sshd_config>
…
AuthorizedKeysCommand /usr/bin/sss_ssh_authorizedkeys
AuthorizedKeysCommandUser nobody
…
</file>
  service ssh restart