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package kube
import (
"path/filepath"
"strings"
"github.com/containers/podman/v2/libpod"
"github.com/pkg/errors"
v1 "k8s.io/api/core/v1"
)
// KubeSeccompPaths holds information about a pod YAML's seccomp configuration
// it holds both container and pod seccomp paths
type KubeSeccompPaths struct {
containerPaths map[string]string
podPath string
}
// FindForContainer checks whether a container has a seccomp path configured for it
// if not, it returns the podPath, which should always have a value
func (k *KubeSeccompPaths) FindForContainer(ctrName string) string {
if path, ok := k.containerPaths[ctrName]; ok {
return path
}
return k.podPath
}
// InitializeSeccompPaths takes annotations from the pod object metadata and finds annotations pertaining to seccomp
// it parses both pod and container level
// if the annotation is of the form "localhost/%s", the seccomp profile will be set to profileRoot/%s
func InitializeSeccompPaths(annotations map[string]string, profileRoot string) (*KubeSeccompPaths, error) {
seccompPaths := &KubeSeccompPaths{containerPaths: make(map[string]string)}
var err error
if annotations != nil {
for annKeyValue, seccomp := range annotations {
// check if it is prefaced with container.seccomp.security.alpha.kubernetes.io/
prefixAndCtr := strings.Split(annKeyValue, "/")
if prefixAndCtr[0]+"/" != v1.SeccompContainerAnnotationKeyPrefix {
continue
} else if len(prefixAndCtr) != 2 {
// this could be caused by a user inputting either of
// container.seccomp.security.alpha.kubernetes.io{,/}
// both of which are invalid
return nil, errors.Errorf("Invalid seccomp path: %s", prefixAndCtr[0])
}
path, err := verifySeccompPath(seccomp, profileRoot)
if err != nil {
return nil, err
}
seccompPaths.containerPaths[prefixAndCtr[1]] = path
}
podSeccomp, ok := annotations[v1.SeccompPodAnnotationKey]
if ok {
seccompPaths.podPath, err = verifySeccompPath(podSeccomp, profileRoot)
} else {
seccompPaths.podPath, err = libpod.DefaultSeccompPath()
}
if err != nil {
return nil, err
}
}
return seccompPaths, nil
}
// verifySeccompPath takes a path and checks whether it is a default, unconfined, or a path
// the available options are parsed as defined in https://kubernetes.io/docs/concepts/policy/pod-security-policy/#seccomp
func verifySeccompPath(path string, profileRoot string) (string, error) {
switch path {
case v1.DeprecatedSeccompProfileDockerDefault:
fallthrough
case v1.SeccompProfileRuntimeDefault:
return libpod.DefaultSeccompPath()
case "unconfined":
return path, nil
default:
parts := strings.Split(path, "/")
if parts[0] == "localhost" {
return filepath.Join(profileRoot, parts[1]), nil
}
return "", errors.Errorf("invalid seccomp path: %s", path)
}
}
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