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prepare.go
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prepare.go
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/* Vuls - Vulnerability Scanner
Copyright (C) 2016 Future Architect, Inc. Japan.
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 <http://www.gnu.org/licenses/>.
*/
package commands
import (
"flag"
"os"
"path/filepath"
"github.com/Sirupsen/logrus"
c "github.com/future-architect/vuls/config"
"github.com/future-architect/vuls/scan"
"github.com/future-architect/vuls/util"
"github.com/google/subcommands"
"golang.org/x/net/context"
)
// PrepareCmd is Subcommand of host discovery mode
type PrepareCmd struct {
debug bool
configPath string
askSudoPassword bool
askKeyPassword bool
}
// Name return subcommand name
func (*PrepareCmd) Name() string { return "prepare" }
// Synopsis return synopsis
func (*PrepareCmd) Synopsis() string {
return `Install required packages to scan.
CentOS: yum-plugin-security, yum-plugin-changelog
Amazon: None
RHEL: TODO
Ubuntu: None
`
}
// Usage return usage
func (*PrepareCmd) Usage() string {
return `prepare:
prepare
[-config=/path/to/config.toml]
[-ask-key-password]
[-debug]
[SERVER]...
`
}
// SetFlags set flag
func (p *PrepareCmd) SetFlags(f *flag.FlagSet) {
f.BoolVar(&p.debug, "debug", false, "debug mode")
wd, _ := os.Getwd()
defaultConfPath := filepath.Join(wd, "config.toml")
f.StringVar(&p.configPath, "config", defaultConfPath, "/path/to/toml")
f.BoolVar(
&p.askKeyPassword,
"ask-key-password",
false,
"Ask ssh privatekey password before scanning",
)
f.BoolVar(
&p.askSudoPassword,
"ask-sudo-password",
false,
"[Deprecated] THIS OPTION WAS REMOVED FOR SECURITY REASON. Define NOPASSWD in /etc/sudoers on tareget servers and use SSH key-based authentication",
)
}
// Execute execute
func (p *PrepareCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
var keyPass string
var err error
if p.askKeyPassword {
prompt := "SSH key password: "
if keyPass, err = getPasswd(prompt); err != nil {
logrus.Error(err)
return subcommands.ExitFailure
}
}
if p.askSudoPassword {
logrus.Errorf("[Deprecated] -ask-sudo-password WAS REMOVED FOR SECURITY REASONS. Define NOPASSWD in /etc/sudoers on tareget servers and use SSH key-based authentication")
return subcommands.ExitFailure
}
err = c.Load(p.configPath, keyPass)
if err != nil {
logrus.Errorf("Error loading %s, %s", p.configPath, err)
return subcommands.ExitUsageError
}
logrus.Infof("Start Preparing (config: %s)", p.configPath)
target := make(map[string]c.ServerInfo)
for _, arg := range f.Args() {
found := false
for servername, info := range c.Conf.Servers {
if servername == arg {
target[servername] = info
found = true
break
}
}
if !found {
logrus.Errorf("%s is not in config", arg)
return subcommands.ExitUsageError
}
}
if 0 < len(f.Args()) {
c.Conf.Servers = target
}
c.Conf.Debug = p.debug
// Set up custom logger
logger := util.NewCustomLogger(c.ServerInfo{})
logger.Info("Detecting OS... ")
scan.InitServers(logger)
logger.Info("Checking sudo configuration... ")
if err := scan.CheckIfSudoNoPasswd(logger); err != nil {
logger.Errorf("Failed to sudo with nopassword via SSH. Define NOPASSWD in /etc/sudoers on target servers")
return subcommands.ExitFailure
}
logger.Info("Installing...")
if errs := scan.Prepare(); 0 < len(errs) {
for _, e := range errs {
logger.Errorf("Failed: %s", e)
}
return subcommands.ExitFailure
}
logger.Info("Success")
return subcommands.ExitSuccess
}