82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
/*
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SSHSecure - a program to harden OpenSSH from defaults
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Copyright (C) 2020 Brent Saner
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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 config
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path"
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"github.com/pkg/errors"
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"r00t2.io/sysutils/exec_extra"
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"r00t2.io/sysutils/paths"
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)
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func ChkConfig(config *[]byte) (bool, error) {
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var sysPaths []string
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var binPath string
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var tmpConf *os.File
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var err error
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var stdout, stderr bytes.Buffer
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// sshd *requires* to be invoked with an absolute path.
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sysPaths, err = paths.GetPathEnv()
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if err != nil {
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return false, err
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}
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for _, p := range sysPaths {
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fpath := path.Join(p, "sshd")
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if exists, err := paths.RealPathExists(&fpath); err != nil {
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return false, err
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} else if !exists {
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continue
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}
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binPath = fpath
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break
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}
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tmpConf, err = ioutil.TempFile("/tmp", ".test.sshconf.")
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if err != nil {
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return false, err
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}
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defer os.Remove(tmpConf.Name())
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if err = tmpConf.Chmod(0600); err != nil {
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return false, err
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}
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if _, err = tmpConf.Write(*config); err != nil {
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return false, err
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}
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cmd := exec.Command(binPath,
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"-T", fmt.Sprintf("-f %v",
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tmpConf.Name()))
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cmd.Stdout = &stdout
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cmd.Stderr = &stderr
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exitStatus, err := exec_extra.ExecCmdReturn(cmd)
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if err != nil {
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return false, err
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}
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if exitStatus != 0 {
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// TODO: also handle non-empty stderr?
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e := fmt.Sprintf("returned status/exit code %d", exitStatus)
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return false, errors.New(e)
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}
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return true, nil
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}
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