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path: root/src/nshd/hackers_git/hackers.go
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// Copyright 2015 Luke Shumaker <lukeshu@sbcglobal.net>.
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// The GNU General Public License's references to "object code" and
// "executables" are to be interpreted to also include the output of
// any document formatting or typesetting system, including
// intermediate and printed output.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this manual; if not, see
// <http://www.gnu.org/licenses/>.

// Package hackers_git is an nslcd_server Backend that speaks to
// hackers.git.
package hackers_git

import (
	"lukeshu.com/git/go/libnslcd.git/proto"
	"lukeshu.com/git/go/libnslcd.git/proto/server"
	"lukeshu.com/git/go/libnslcd.git/systemd"
	"lukeshu.com/git/go/libsystemd.git/sd_daemon/logger"
	"sync"
)

type user struct {
	passwd nslcd_proto.Passwd
	groups []string
}

type config struct {
	Pam_password_prohibit_message string
}

type Hackers struct {
	nslcd_server.NilBackend
	lock sync.RWMutex

	CfgFilename string
	YamlCat     string

	cfg    config
	users  map[int32]user
	groups map[string]map[string]bool
}

var _ nslcd_systemd.Backend = &Hackers{}
var _ nslcd_server.Backend = &Hackers{}

func (o *Hackers) Init() error {
	logger.Debug("hackers.git: CfgFilename = %v", o.CfgFilename)
	logger.Debug("hackers.git: YamlCat     = %v", o.YamlCat)
	err := o.Reload()
	if err != nil {
		logger.Err("hackers.git: Could not initialize: %v", err)
		return err
	}
	return nil
}

func (o *Hackers) Close() {
	logger.Info("hackers.git: Closing session")
	o.lock.Lock()
	defer o.lock.Unlock()

	o.users = make(map[int32]user, 0)
	o.groups = make(map[string]map[string]bool)
}

func (o *Hackers) Reload() error {
	logger.Info("hackers.git: Loading session")
	o.lock.Lock()
	defer o.lock.Unlock()

	var err error
	o.cfg, err = parse_config(o.CfgFilename)
	if err != nil {
		return err
	}

	logger.Debug("hackers.git:  Parsing user data")
	o.users, err = parse_users(o.YamlCat)
	if err != nil {
		return err
	}

	o.groups = make(map[string]map[string]bool)
	for _, user := range o.users {
		for _, groupname := range user.groups {
			o.add_user_to_group(user.passwd.Name, groupname)
		}
	}
	return nil
}

func (o *Hackers) name2uid(name string) int32 {
	for uid, data := range o.users {
		if data.passwd.Name == name {
			return uid
		}
	}
	return -1
}

func (o *Hackers) add_user_to_group(username string, groupname string) {
	group, found := o.groups[groupname]
	if !found {
		group = make(map[string]bool)
		o.groups[groupname] = group
	}
	group[username] = true
}