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package persist
import (
"io/ioutil"
"os"
"github.com/cloudflare/redoctober/config"
"github.com/cloudflare/redoctober/keycache"
"github.com/cloudflare/redoctober/passvault"
)
// File implements a file-backed persistence store.
type File struct {
config *config.Delegations
cache *keycache.Cache
state string
blob []byte
}
// Valid ensures the configuration is valid for a file store. Note
// that it won't validate the policy, it will just ensure that one
// is present.
func (f *File) Valid() bool {
if f.config.Persist == false {
return false
}
if f.config.Policy == "" {
return false
}
if len(f.config.Users) == 0 {
return false
}
if f.config.Mechanism != FileMechanism {
return false
}
if f.config.Location == "" {
return false
}
return true
}
// newFile returns a new file-backed persistence store.
func newFile(config *config.Delegations) (Store, error) {
cache := keycache.NewCache()
file := &File{
config: config,
cache: &cache,
state: Inactive,
}
if !file.Valid() {
return nil, ErrInvalidConfig
}
err := file.Load()
if err != nil {
return nil, err
}
return file, nil
}
func (f *File) Blob() []byte {
return f.blob
}
func (f *File) Policy() string {
return f.config.Policy
}
func (f *File) Users() []string {
return f.config.Users
}
func (f *File) Store(blob []byte) error {
if f.state == Active {
f.blob = blob
return ioutil.WriteFile(f.config.Location, blob, 0644)
}
return nil
}
func (f *File) Load() error {
if fi, err := os.Stat(f.config.Location); err != nil {
// If the file doesn't exist, it can be persisted
// immediately.
if os.IsNotExist(err) {
f.state = Active
return nil
}
return err
} else if fi.Size() == 0 {
f.state = Active
return nil
}
in, err := ioutil.ReadFile(f.config.Location)
if err != nil {
return err
}
f.state = Inactive
f.blob = in
return nil
}
func (f *File) Persist() {
f.state = Active
}
func (f *File) Cache() *keycache.Cache {
return f.cache
}
func (f *File) Delegate(record passvault.PasswordRecord, name, password string, users, labels []string, uses int, slot, durationString string) error {
return f.cache.AddKeyFromRecord(record, name, password, users, labels, uses, slot, durationString)
}
func (f *File) Status() *Status {
return &Status{
State: f.state,
Summary: f.cache.GetSummary(),
}
}
func (f *File) Purge() error {
f.state = Active
f.blob = nil
if err := os.Remove(f.config.Location); err != nil {
return err
}
return nil
}
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