晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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# Copyright (C) 2013,2018 Red Hat, Inc., Bryn M. Reeves <bmr@redhat.com>

# This file is part of the sos project: https://github.com/sosreport/sos
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# version 2 of the GNU General Public License.
#
# See the LICENSE file in the source distribution for further information.

import re
import socket
from sos.report.plugins import Plugin, RedHatPlugin, DebianPlugin, UbuntuPlugin


class Krb5(Plugin):
    """This plugin handles the collection of kerberos authentication config
    files and logging. Users should expect to see their krb5 config(s) in the
    final archive, along with krb5 logging and `klist` output.

    kdc configs and acls will also be collected from the distribution-spcecific
    kdc directory.
    """

    short_desc = 'Kerberos authentication'
    plugin_name = 'krb5'
    profiles = ('identity', 'system')
    kdcdir = None

    def setup(self):
        self.add_copy_spec([
            "/etc/krb5.conf",
            "/etc/krb5.conf.d/*",
            f"{self.kdcdir}/kadm5.acl",
            f"{self.kdcdir}/kdc.conf",
            "/var/log/kadmind.log"
        ])
        self.collect_kinit()
        self.add_copy_spec("/var/log/krb5kdc.log", tags="kerberos_kdc_log")
        self.add_cmd_output(f"klist -ket {self.kdcdir}/.k5*")
        self.add_cmd_output("klist -ket /etc/krb5.keytab")

    def collect_kinit(self):
        """
        Collect the kinit command output for the system with id_provider "AD"
        or "IPA" domains.

        While integrating the Linux M/c with AD the realmd will create a
        computer object on the AD side. The realmd and AD restrict the
        Hostname/SPN to 15 Characters.
        """

        hostname = socket.getfqdn()
        sssd_conf = "/etc/sssd/sssd.conf"
        if self.path_isfile(sssd_conf):
            with open(sssd_conf, 'r', encoding='utf-8') as f:
                for line in f:
                    if re.match(r'\s*id_provider\s*=\s*ad',
                                line, re.IGNORECASE):
                        hostname = hostname.split('.')[0][:15].upper()
                        self.add_cmd_output(f"KRB5_TRACE=/dev/stdout \
                                            kinit -k '{hostname}$'")
                        break
                    if re.match(r'\s*id_provider\s*=\s*ipa',
                                line, re.IGNORECASE):
                        self.add_cmd_output(f"KRB5_TRACE=/dev/stdout \
                                            kinit -k '{hostname}'")
                        break


class RedHatKrb5(Krb5, RedHatPlugin):

    packages = ('krb5-libs', 'krb5-server')
    kdcdir = "/var/kerberos/krb5kdc"


class UbuntuKrb5(Krb5, DebianPlugin, UbuntuPlugin):

    packages = ('krb5-kdc', 'krb5-config', 'krb5-user')
    kdcdir = "/var/lib/krb5kdc"

# vim: set et ts=4 sw=4 :

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