82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
/*
|
|
SSHSecure - a program to harden OpenSSH from defaults
|
|
Copyright (C) 2020 Brent Saner
|
|
|
|
This program 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 program. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package config
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io/ioutil"
|
|
"os"
|
|
"os/exec"
|
|
"path"
|
|
|
|
"github.com/pkg/errors"
|
|
"r00t2.io/sysutils/exec_extra"
|
|
"r00t2.io/sysutils/paths"
|
|
)
|
|
|
|
func TestConfig(config *[]byte) (bool, error) {
|
|
var sysPaths []string
|
|
var binPath string
|
|
var tmpConf *os.File
|
|
var err error
|
|
var stdout, stderr bytes.Buffer
|
|
// sshd *requires* to be invoked with an absolute path.
|
|
sysPaths, err = paths.GetPathEnv()
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
for _, p := range sysPaths {
|
|
fpath := path.Join(p, "sshd")
|
|
if exists, err := paths.RealPathExists(&fpath); err != nil {
|
|
return false, err
|
|
} else if !exists {
|
|
continue
|
|
}
|
|
binPath = fpath
|
|
break
|
|
}
|
|
tmpConf, err = ioutil.TempFile("/tmp", ".test.sshconf.")
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
defer os.Remove(tmpConf.Name())
|
|
if err = tmpConf.Chmod(0600); err != nil {
|
|
return false, err
|
|
}
|
|
if _, err = tmpConf.Write(*config); err != nil {
|
|
return false, err
|
|
}
|
|
cmd := exec.Command(binPath,
|
|
"-T", fmt.Sprintf("-f %v",
|
|
tmpConf.Name()))
|
|
cmd.Stdout = &stdout
|
|
cmd.Stderr = &stderr
|
|
exitStatus, err := exec_extra.ExecCmdReturn(cmd)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if exitStatus != 0 {
|
|
// TODO: also handle non-empty stderr?
|
|
e := fmt.Sprintf("returned status/exit code %d", exitStatus)
|
|
return false, errors.New(e)
|
|
}
|
|
return true, nil
|
|
}
|