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moby--moby/cmd/dockerd/options.go
Brian Goff 5f5285a6e2 Sterner warnings for unathenticated tcp
People keep doing this and getting pwned because they accidentally left
it exposed to the internet.

The warning about doing this has been there forever.
This introduces a sleep after warning.
To disable the extra sleep users must explicitly specify `--tls=false`
or `--tlsverify=false`

Warning also specifies this sleep will be removed in the next release
where the flag will be required if running unauthenticated.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
2020-09-25 00:21:54 +00:00

117 lines
3.8 KiB
Go

package main
import (
"os"
"path/filepath"
cliconfig "github.com/docker/docker/cli/config"
"github.com/docker/docker/daemon/config"
"github.com/docker/docker/opts"
"github.com/docker/go-connections/tlsconfig"
"github.com/spf13/pflag"
)
const (
// DefaultCaFile is the default filename for the CA pem file
DefaultCaFile = "ca.pem"
// DefaultKeyFile is the default filename for the key pem file
DefaultKeyFile = "key.pem"
// DefaultCertFile is the default filename for the cert pem file
DefaultCertFile = "cert.pem"
// FlagTLSVerify is the flag name for the TLS verification option
FlagTLSVerify = "tlsverify"
// FlagTLS is the flag name for the TLS option
FlagTLS = "tls"
// DefaultTLSValue is the default value used for setting the tls option for tcp connections
DefaultTLSValue = false
)
var (
dockerCertPath = os.Getenv("DOCKER_CERT_PATH")
dockerTLSVerify = os.Getenv("DOCKER_TLS_VERIFY") != ""
)
type daemonOptions struct {
configFile string
daemonConfig *config.Config
flags *pflag.FlagSet
Debug bool
Hosts []string
LogLevel string
TLS bool
TLSVerify bool
TLSOptions *tlsconfig.Options
}
// newDaemonOptions returns a new daemonFlags
func newDaemonOptions(config *config.Config) *daemonOptions {
return &daemonOptions{
daemonConfig: config,
}
}
// InstallFlags adds flags for the common options on the FlagSet
func (o *daemonOptions) InstallFlags(flags *pflag.FlagSet) {
if dockerCertPath == "" {
// cliconfig.Dir returns $DOCKER_CONFIG or ~/.docker.
// cliconfig.Dir does not look up $XDG_CONFIG_HOME
dockerCertPath = cliconfig.Dir()
}
flags.BoolVarP(&o.Debug, "debug", "D", false, "Enable debug mode")
flags.StringVarP(&o.LogLevel, "log-level", "l", "info", `Set the logging level ("debug"|"info"|"warn"|"error"|"fatal")`)
flags.BoolVar(&o.TLS, FlagTLS, DefaultTLSValue, "Use TLS; implied by --tlsverify")
flags.BoolVar(&o.TLSVerify, FlagTLSVerify, dockerTLSVerify || DefaultTLSValue, "Use TLS and verify the remote")
// TODO use flag flags.String("identity"}, "i", "", "Path to libtrust key file")
o.TLSOptions = &tlsconfig.Options{
CAFile: filepath.Join(dockerCertPath, DefaultCaFile),
CertFile: filepath.Join(dockerCertPath, DefaultCertFile),
KeyFile: filepath.Join(dockerCertPath, DefaultKeyFile),
}
tlsOptions := o.TLSOptions
flags.Var(opts.NewQuotedString(&tlsOptions.CAFile), "tlscacert", "Trust certs signed only by this CA")
flags.Var(opts.NewQuotedString(&tlsOptions.CertFile), "tlscert", "Path to TLS certificate file")
flags.Var(opts.NewQuotedString(&tlsOptions.KeyFile), "tlskey", "Path to TLS key file")
hostOpt := opts.NewNamedListOptsRef("hosts", &o.Hosts, opts.ValidateHost)
flags.VarP(hostOpt, "host", "H", "Daemon socket(s) to connect to")
}
// SetDefaultOptions sets default values for options after flag parsing is
// complete
func (o *daemonOptions) SetDefaultOptions(flags *pflag.FlagSet) {
// Regardless of whether the user sets it to true or false, if they
// specify --tlsverify at all then we need to turn on TLS
// TLSVerify can be true even if not set due to DOCKER_TLS_VERIFY env var, so we need
// to check that here as well
if flags.Changed(FlagTLSVerify) || o.TLSVerify {
o.TLS = true
}
if o.TLS && !flags.Changed(FlagTLSVerify) {
// Enable tls verification unless explicitly disabled
o.TLSVerify = true
}
if !o.TLS {
o.TLSOptions = nil
} else {
tlsOptions := o.TLSOptions
tlsOptions.InsecureSkipVerify = !o.TLSVerify
// Reset CertFile and KeyFile to empty string if the user did not specify
// the respective flags and the respective default files were not found.
if !flags.Changed("tlscert") {
if _, err := os.Stat(tlsOptions.CertFile); os.IsNotExist(err) {
tlsOptions.CertFile = ""
}
}
if !flags.Changed("tlskey") {
if _, err := os.Stat(tlsOptions.KeyFile); os.IsNotExist(err) {
tlsOptions.KeyFile = ""
}
}
}
}