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|
#!/usr/bin/env bash
LDAPSEARCH=ldapsearch
KEY="immaeSshKey"
LDAP_BIND="cn=ssh,ou=services,dc=immae,dc=eu"
#LDAP_PASS="password taken from environment"
LDAP_HOST="ldap.immae.eu"
LDAP_MEMBER="cn=users,cn=ssh,ou=services,dc=immae,dc=eu"
LDAP_GITOLITE_MEMBER="cn=users,cn=gitolite,ou=services,dc=immae,dc=eu"
LDAP_PUB_RESTRICT_MEMBER="cn=restrict,cn=pub,ou=services,dc=immae,dc=eu"
LDAP_PUB_FORWARD_MEMBER="cn=forward,cn=pub,ou=services,dc=immae,dc=eu"
LDAP_BASE="dc=immae,dc=eu"
suitable_for() {
type_for="$1"
key="$2"
if [[ $key != *$'\n'* ]] && [[ $key == ssh-* ]]; then
echo "$key"
else
key_type=$(cut -d " " -f 1 <<< "$key")
if grep -q "\b-$type_for\b" <<< "$key_type"; then
echo ""
elif grep -q "\b$type_for\b" <<< "$key_type"; then
echo $(sed -e "s/^[^ ]* //g" <<< "$key")
else
echo ""
fi
fi
}
clean_key_line() {
type_for="$1"
line="$2"
if [[ "$line" == $KEY::* ]]; then
# base64 keys should't happen, unless wrong copy-pasting
key=""
else
key=$(sed -e "s/^$KEY: *//" -e "s/ *$//" <<< "$line")
fi
suitable_for "$type_for" "$key"
}
ldap_search() {
$LDAPSEARCH -h $LDAP_HOST -b $LDAP_BASE -D $LDAP_BIND -w "$LDAP_PASS" -x -o ldif-wrap=no -LLL "$@"
}
ldap_keys() {
user=$1;
if [[ $user == gitolite ]]; then
ldap_search '(&(memberOf='$LDAP_GITOLITE_MEMBER')('$KEY'=*))' $KEY | \
while read line ;
do
if [ ! -z "$line" ]; then
if [[ $line == dn* ]]; then
user=$(sed -n 's/.*uid=\([^,]*\).*/\1/p' <<< "$line")
if [ -n "$user" ]; then
if [[ $user == "immae" ]] || [[ $user == "denise" ]]; then
# Capitalize first letter (backward compatibility)
user=$(sed -r 's/^([a-z])/\U\1/' <<< "$user")
fi
else
# Service fake user
user=$(sed -n 's/.*cn=\([^,]*\).*/\1/p' <<< "$line")
fi
elif [[ $line == $KEY* ]]; then
key=$(clean_key_line git "$line")
if [ ! -z "$key" ]; then
if [[ $key != *$'\n'* ]] && [[ $key == ssh-* ]]; then
echo -n 'command="'$GITOLITE_SHELL' '$user'",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty '
echo $key
fi
fi
fi
fi
done
exit 0
elif [[ $user == pub ]]; then
ldap_search '(&(memberOf='$LDAP_PUB_RESTRICT_MEMBER')('$KEY'=*))' $KEY | \
while read line ;
do
if [ ! -z "$line" ]; then
if [[ $line == dn* ]]; then
echo ""
user=$(sed -n 's/.*uid=\([^,]*\).*/\1/p' <<< "$line")
echo "# $user"
elif [[ $line == $KEY* ]]; then
key=$(clean_key_line pub "$line")
key_forward=$(clean_key_line forward "$line")
if [ ! -z "$key" ]; then
if [[ $key != *$'\n'* ]] && [[ $key == ssh-* ]]; then
echo -n 'command="$HOME/bin/restrict '$user'" '
echo $key
fi
elif [ ! -z "$key_forward" ]; then
if [[ $key_forward != *$'\n'* ]] && [[ $key_forward == ssh-* ]]; then
echo "# forward only"
echo -n 'no-pty,no-X11-forwarding,command="'$ECHO' forward only" '
echo $key_forward
fi
fi
fi
fi
done
echo ""
ldap_search '(&(memberOf='$LDAP_PUB_FORWARD_MEMBER')('$KEY'=*))' $KEY | \
while read line ;
do
if [ ! -z "$line" ]; then
if [[ $line == dn* ]]; then
echo ""
user=$(sed -n 's/.*uid=\([^,]*\).*/\1/p' <<< "$line")
echo "# $user"
elif [[ $line == $KEY* ]]; then
key=$(clean_key_line forward "$line")
if [ ! -z "$key" ]; then
if [[ $key != *$'\n'* ]] && [[ $key == ssh-* ]]; then
echo -n 'no-pty,no-X11-forwarding,command="'$ECHO' forward only" '
echo $key
fi
fi
fi
fi
done
exit 0
else
ldap_search '(&(memberOf='$LDAP_MEMBER')('$KEY'=*)(uid='$user'))' $KEY | \
while read line ;
do
if [ ! -z "$line" ]; then
if [[ $line == dn* ]]; then
user=$(sed -n 's/.*uid=\([^,]*\).*/\1/p' <<< "$line")
elif [[ $line == $KEY* ]]; then
key=$(clean_key_line ssh "$line")
if [ ! -z "$key" ]; then
if [[ $key != *$'\n'* ]] && [[ $key == ssh-* ]]; then
echo $key
fi
fi
fi
fi
done
fi
}
ldap_keys $@
|
