/
db.go
219 lines (192 loc) · 5.51 KB
/
db.go
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package builtin
import (
"context"
"fmt"
"github.com/boltdb/bolt"
"github.com/pkg/errors"
"github.com/micromdm/micromdm/platform/device"
)
const (
DeviceBucket = "mdm.Devices"
// The deviceIndexBucket index bucket stores serial number and UDID references
// to the device uuid.
deviceIndexBucket = "mdm.DeviceIdx"
// The udidCertAuthBucket stores a simple mapping from UDID to
// sha256 hash of the device identity certificate for future validation
udidCertAuthBucket = "mdm.UDIDCertAuth"
)
type DB struct {
*bolt.DB
}
func NewDB(db *bolt.DB) (*DB, error) {
err := db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists([]byte(deviceIndexBucket))
if err != nil {
return err
}
_, err = tx.CreateBucketIfNotExists([]byte(DeviceBucket))
if err != nil {
return err
}
_, err = tx.CreateBucketIfNotExists([]byte(udidCertAuthBucket))
return err
})
if err != nil {
return nil, errors.Wrapf(err, "creating %s bucket", DeviceBucket)
}
datastore := &DB{DB: db}
return datastore, nil
}
func (db *DB) List(ctx context.Context, opt device.ListDevicesOption) ([]device.Device, error) {
var devices []device.Device
err := db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(DeviceBucket))
// TODO optimize by implemting Seek() and bytes.HasPrefix() so we don't
// hit all keys in the database if we dont have to.
return b.ForEach(func(k, v []byte) error {
var dev device.Device
if err := device.UnmarshalDevice(v, &dev); err != nil {
return err
}
if len(opt.FilterSerial) == 0 {
devices = append(devices, dev)
return nil
}
for _, fs := range opt.FilterSerial {
if fs == dev.SerialNumber {
devices = append(devices, dev)
}
}
return nil
})
})
return devices, err
}
func (db *DB) Save(ctx context.Context, dev *device.Device) error {
tx, err := db.DB.Begin(true)
if err != nil {
return errors.Wrap(err, "begin transaction")
}
bkt := tx.Bucket([]byte(DeviceBucket))
if bkt == nil {
return fmt.Errorf("bucket %q not found!", DeviceBucket)
}
devproto, err := device.MarshalDevice(dev)
if err != nil {
return errors.Wrap(err, "marshalling device")
}
// store an array of indices to reference the UUID, which will be the
// key used to store the actual device.
indexes := []string{dev.UDID, dev.SerialNumber}
idxBucket := tx.Bucket([]byte(deviceIndexBucket))
if idxBucket == nil {
return fmt.Errorf("bucket %q not found!", deviceIndexBucket)
}
for _, idx := range indexes {
if idx == "" {
continue
}
key := []byte(idx)
if err := idxBucket.Put(key, []byte(dev.UUID)); err != nil {
return errors.Wrap(err, "put device to boltdb")
}
}
key := []byte(dev.UUID)
if err := bkt.Put(key, devproto); err != nil {
return errors.Wrap(err, "put device to boltdb")
}
return tx.Commit()
}
func (db *DB) DeleteByUDID(ctx context.Context, udid string) error {
return db.deleteByIndex(udid)
}
func (db *DB) DeleteBySerial(ctx context.Context, serial string) error {
return db.deleteByIndex(serial)
}
func (db *DB) deleteByIndex(key string) error {
device, err := db.deviceByIndex(key)
if err != nil {
return err
}
tx, err := db.DB.Begin(true)
if err != nil {
return errors.Wrap(err, "begin transaction")
}
bkt := tx.Bucket([]byte(DeviceBucket))
if err := bkt.Delete([]byte(device.UUID)); err != nil {
return errors.Wrapf(err, "delete device for key %s", key)
}
idxBucket := tx.Bucket([]byte(deviceIndexBucket))
if err := idxBucket.Delete([]byte(device.UDID)); err != nil {
return errors.Wrapf(err, "delete device index for UDID %s", device.UDID)
}
if err := idxBucket.Delete([]byte(device.SerialNumber)); err != nil {
return errors.Wrapf(err, "delete device index for serial %s", device.SerialNumber)
}
return tx.Commit()
}
type notFound struct {
ResourceType string
Message string
}
func (e *notFound) Error() string {
return fmt.Sprintf("not found: %s %s", e.ResourceType, e.Message)
}
func (e *notFound) NotFound() bool {
return true
}
func (db *DB) DeviceByUDID(ctx context.Context, udid string) (*device.Device, error) {
return db.deviceByIndex(udid)
}
func (db *DB) DeviceBySerial(ctx context.Context, serial string) (*device.Device, error) {
return db.deviceByIndex(serial)
}
func (db *DB) deviceByIndex(key string) (*device.Device, error) {
var dev device.Device
err := db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(DeviceBucket))
ib := tx.Bucket([]byte(deviceIndexBucket))
idx := ib.Get([]byte(key))
if idx == nil {
return ¬Found{"Device", fmt.Sprintf("key %s", key)}
}
v := b.Get(idx)
if idx == nil {
return ¬Found{"Device", fmt.Sprintf("uuid %s", string(idx))}
}
return device.UnmarshalDevice(v, &dev)
})
if err != nil {
return nil, err
}
return &dev, nil
}
func (db *DB) SaveUDIDCertHash(udid, certHash []byte) error {
tx, err := db.DB.Begin(true)
if err != nil {
return errors.Wrap(err, "begin transaction")
}
bkt := tx.Bucket([]byte(udidCertAuthBucket))
if bkt == nil {
return fmt.Errorf("bucket %q not found!", udidCertAuthBucket)
}
if err := bkt.Put(udid, certHash); err != nil {
return errors.Wrap(err, "put udid cert to boltdb")
}
return tx.Commit()
}
func (db *DB) GetUDIDCertHash(udid []byte) ([]byte, error) {
var certHash []byte
err := db.View(func(tx *bolt.Tx) error {
b := tx.Bucket([]byte(udidCertAuthBucket))
if b == nil {
return fmt.Errorf("bucket %q not found!", udidCertAuthBucket)
}
certHash = b.Get(udid)
if certHash == nil {
return ¬Found{"UDID", fmt.Sprintf("udid %s", string(udid))}
}
return nil
})
return certHash, err
}