mirror of
https://github.com/foxcpp/maddy.git
synced 2025-04-03 05:07:38 +03:00
100 lines
2.2 KiB
Go
100 lines
2.2 KiB
Go
/*
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Maddy Mail Server - Composable all-in-one email server.
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Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package shadow
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import (
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"bufio"
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"errors"
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"fmt"
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"os"
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"strconv"
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"strings"
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)
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var (
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ErrNoSuchUser = errors.New("shadow: user entry is not present in database")
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ErrWrongPassword = errors.New("shadow: wrong password")
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)
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// Read reads system shadow passwords database and returns all entires in it.
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func Read() ([]Entry, error) {
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f, err := os.Open("/etc/shadow")
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if err != nil {
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return nil, err
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}
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scnr := bufio.NewScanner(f)
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var res []Entry
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for scnr.Scan() {
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ent, err := parseEntry(scnr.Text())
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if err != nil {
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return res, err
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}
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res = append(res, *ent)
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}
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if err := scnr.Err(); err != nil {
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return res, err
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}
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return res, nil
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}
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func parseEntry(line string) (*Entry, error) {
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parts := strings.Split(line, ":")
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if len(parts) != 9 {
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return nil, errors.New("read: malformed entry")
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}
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res := &Entry{
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Name: parts[0],
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Pass: parts[1],
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}
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for i, value := range [...]*int{
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&res.LastChange, &res.MinPassAge, &res.MaxPassAge,
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&res.WarnPeriod, &res.InactivityPeriod, &res.AcctExpiry, &res.Flags,
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} {
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if parts[2+i] == "" {
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*value = -1
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} else {
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var err error
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*value, err = strconv.Atoi(parts[2+i])
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if err != nil {
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return nil, fmt.Errorf("read: invalid value for field %d", 2+i)
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}
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}
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}
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return res, nil
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}
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func Lookup(name string) (*Entry, error) {
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entries, err := Read()
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if err != nil {
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return nil, err
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}
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for _, entry := range entries {
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if entry.Name == name {
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return &entry, nil
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}
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}
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return nil, ErrNoSuchUser
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}
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