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package createconfig
import (
"fmt"
"strings"
"github.com/containers/common/pkg/capabilities"
"github.com/containers/podman/v2/libpod"
"github.com/containers/podman/v2/libpod/define"
"github.com/containers/podman/v2/pkg/util"
"github.com/opencontainers/runtime-tools/generate"
"github.com/opencontainers/selinux/go-selinux/label"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ToCreateOptions convert the SecurityConfig to a slice of container create
// options.
func (c *SecurityConfig) ToCreateOptions() ([]libpod.CtrCreateOption, error) {
options := make([]libpod.CtrCreateOption, 0)
options = append(options, libpod.WithSecLabels(c.LabelOpts))
options = append(options, libpod.WithPrivileged(c.Privileged))
return options, nil
}
// SetLabelOpts sets the label options of the SecurityConfig according to the
// input.
func (c *SecurityConfig) SetLabelOpts(runtime *libpod.Runtime, pidConfig *PidConfig, ipcConfig *IpcConfig) error {
if c.Privileged {
c.LabelOpts = label.DisableSecOpt()
return nil
}
var labelOpts []string
if pidConfig.PidMode.IsHost() {
labelOpts = append(labelOpts, label.DisableSecOpt()...)
} else if pidConfig.PidMode.IsContainer() {
ctr, err := runtime.LookupContainer(pidConfig.PidMode.Container())
if err != nil {
return errors.Wrapf(err, "container %q not found", pidConfig.PidMode.Container())
}
secopts, err := label.DupSecOpt(ctr.ProcessLabel())
if err != nil {
return errors.Wrapf(err, "failed to duplicate label %q ", ctr.ProcessLabel())
}
labelOpts = append(labelOpts, secopts...)
}
if ipcConfig.IpcMode.IsHost() {
labelOpts = append(labelOpts, label.DisableSecOpt()...)
} else if ipcConfig.IpcMode.IsContainer() {
ctr, err := runtime.LookupContainer(ipcConfig.IpcMode.Container())
if err != nil {
return errors.Wrapf(err, "container %q not found", ipcConfig.IpcMode.Container())
}
secopts, err := label.DupSecOpt(ctr.ProcessLabel())
if err != nil {
return errors.Wrapf(err, "failed to duplicate label %q ", ctr.ProcessLabel())
}
labelOpts = append(labelOpts, secopts...)
}
c.LabelOpts = append(c.LabelOpts, labelOpts...)
return nil
}
// SetSecurityOpts the the security options (labels, apparmor, seccomp, etc.).
func (c *SecurityConfig) SetSecurityOpts(runtime *libpod.Runtime, securityOpts []string) error {
for _, opt := range securityOpts {
if opt == "no-new-privileges" {
c.NoNewPrivs = true
} else {
con := strings.SplitN(opt, "=", 2)
if len(con) != 2 {
return fmt.Errorf("invalid --security-opt 1: %q", opt)
}
switch con[0] {
case "proc-opts":
c.ProcOpts = strings.Split(con[1], ",")
case "label":
c.LabelOpts = append(c.LabelOpts, con[1])
case "apparmor":
c.ApparmorProfile = con[1]
case "seccomp":
c.SeccompProfilePath = con[1]
default:
return fmt.Errorf("invalid --security-opt 2: %q", opt)
}
}
}
if c.SeccompProfilePath == "" {
var err error
c.SeccompProfilePath, err = libpod.DefaultSeccompPath()
if err != nil {
return err
}
}
c.SecurityOpts = securityOpts
return nil
}
// ConfigureGenerator configures the generator according to the input.
func (c *SecurityConfig) ConfigureGenerator(g *generate.Generator, user *UserConfig) error {
// HANDLE CAPABILITIES
// NOTE: Must happen before SECCOMP
if c.Privileged {
g.SetupPrivileged(true)
}
useNotRoot := func(user string) bool {
if user == "" || user == "root" || user == "0" {
return false
}
return true
}
configSpec := g.Config
var err error
var defaultCaplist []string
bounding := configSpec.Process.Capabilities.Bounding
if useNotRoot(user.User) {
configSpec.Process.Capabilities.Bounding = defaultCaplist
}
defaultCaplist, err = capabilities.MergeCapabilities(configSpec.Process.Capabilities.Bounding, c.CapAdd, c.CapDrop)
if err != nil {
return err
}
privCapRequired := []string{}
if !c.Privileged && len(c.CapRequired) > 0 {
// Pass CapRequired in CapAdd field to normalize capabilities names
capRequired, err := capabilities.MergeCapabilities(nil, c.CapRequired, nil)
if err != nil {
logrus.Errorf("capabilities requested by user or image are not valid: %q", strings.Join(c.CapRequired, ","))
} else {
// Verify all capRequiered are in the defaultCapList
for _, cap := range capRequired {
if !util.StringInSlice(cap, defaultCaplist) {
privCapRequired = append(privCapRequired, cap)
}
}
}
if len(privCapRequired) == 0 {
defaultCaplist = capRequired
} else {
logrus.Errorf("capabilities requested by user or image are not allowed by default: %q", strings.Join(privCapRequired, ","))
}
}
configSpec.Process.Capabilities.Bounding = defaultCaplist
configSpec.Process.Capabilities.Permitted = defaultCaplist
configSpec.Process.Capabilities.Inheritable = defaultCaplist
configSpec.Process.Capabilities.Effective = defaultCaplist
configSpec.Process.Capabilities.Ambient = defaultCaplist
if useNotRoot(user.User) {
defaultCaplist, err = capabilities.MergeCapabilities(bounding, c.CapAdd, c.CapDrop)
if err != nil {
return err
}
}
configSpec.Process.Capabilities.Bounding = defaultCaplist
// HANDLE SECCOMP
if c.SeccompProfilePath != "unconfined" {
seccompConfig, err := getSeccompConfig(c, configSpec)
if err != nil {
return err
}
configSpec.Linux.Seccomp = seccompConfig
}
// Clear default Seccomp profile from Generator for privileged containers
if c.SeccompProfilePath == "unconfined" || c.Privileged {
configSpec.Linux.Seccomp = nil
}
for _, opt := range c.SecurityOpts {
// Split on both : and =
splitOpt := strings.SplitN(opt, "=", 2)
if len(splitOpt) == 1 {
splitOpt = strings.Split(opt, ":")
}
if len(splitOpt) < 2 {
continue
}
switch splitOpt[0] {
case "label":
configSpec.Annotations[define.InspectAnnotationLabel] = splitOpt[1]
case "seccomp":
configSpec.Annotations[define.InspectAnnotationSeccomp] = splitOpt[1]
case "apparmor":
configSpec.Annotations[define.InspectAnnotationApparmor] = splitOpt[1]
}
}
g.SetRootReadonly(c.ReadOnlyRootfs)
for sysctlKey, sysctlVal := range c.Sysctl {
g.AddLinuxSysctl(sysctlKey, sysctlVal)
}
return nil
}
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