mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-26 07:59:37 -05:00
f9a581f329
* Move file watcher and validator to internal * Add aTLS endpoint to KMS for Kubernetes external requests * Update Go version in Dockerfiles * Move most KMS packages to internal Signed-off-by: Daniel Weiße <dw@edgeless.systems>
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
package watcher
|
|
|
|
import (
|
|
"encoding/asn1"
|
|
"fmt"
|
|
"path/filepath"
|
|
"sync"
|
|
|
|
"github.com/edgelesssys/constellation/internal/atls"
|
|
"github.com/edgelesssys/constellation/internal/attestation/azure"
|
|
"github.com/edgelesssys/constellation/internal/attestation/gcp"
|
|
"github.com/edgelesssys/constellation/internal/attestation/qemu"
|
|
"github.com/edgelesssys/constellation/internal/cloud/cloudprovider"
|
|
"github.com/edgelesssys/constellation/internal/constants"
|
|
"github.com/edgelesssys/constellation/internal/file"
|
|
"github.com/edgelesssys/constellation/internal/logger"
|
|
)
|
|
|
|
// Updatable implements an updatable atls.Validator.
|
|
type Updatable struct {
|
|
log *logger.Logger
|
|
mux sync.Mutex
|
|
newValidator newValidatorFunc
|
|
fileHandler file.Handler
|
|
atls.Validator
|
|
}
|
|
|
|
// NewValidator initializes a new updatable validator.
|
|
func NewValidator(log *logger.Logger, csp string, fileHandler file.Handler) (*Updatable, error) {
|
|
var newValidator newValidatorFunc
|
|
switch cloudprovider.FromString(csp) {
|
|
case cloudprovider.Azure:
|
|
newValidator = func(m map[uint32][]byte) atls.Validator { return azure.NewValidator(m) }
|
|
case cloudprovider.GCP:
|
|
newValidator = func(m map[uint32][]byte) atls.Validator { return gcp.NewValidator(m) }
|
|
case cloudprovider.QEMU:
|
|
newValidator = func(m map[uint32][]byte) atls.Validator { return qemu.NewValidator(m) }
|
|
default:
|
|
return nil, fmt.Errorf("unknown cloud service provider: %q", csp)
|
|
}
|
|
|
|
u := &Updatable{
|
|
log: log,
|
|
newValidator: newValidator,
|
|
fileHandler: fileHandler,
|
|
}
|
|
|
|
if err := u.Update(); err != nil {
|
|
return nil, err
|
|
}
|
|
return u, nil
|
|
}
|
|
|
|
// Validate calls the validators Validate method, and prevents any updates during the call.
|
|
func (u *Updatable) Validate(attDoc []byte, nonce []byte) ([]byte, error) {
|
|
u.mux.Lock()
|
|
defer u.mux.Unlock()
|
|
return u.Validator.Validate(attDoc, nonce)
|
|
}
|
|
|
|
// OID returns the validators Object Identifier.
|
|
func (u *Updatable) OID() asn1.ObjectIdentifier {
|
|
return u.Validator.OID()
|
|
}
|
|
|
|
// Update switches out the underlying validator.
|
|
func (u *Updatable) Update() error {
|
|
u.mux.Lock()
|
|
defer u.mux.Unlock()
|
|
|
|
u.log.Infof("Updating expected measurements")
|
|
|
|
var measurements map[uint32][]byte
|
|
if err := u.fileHandler.ReadJSON(filepath.Join(constants.ServiceBasePath, constants.MeasurementsFilename), &measurements); err != nil {
|
|
return err
|
|
}
|
|
u.log.Debugf("New measurements: %v", measurements)
|
|
|
|
u.Validator = u.newValidator(measurements)
|
|
|
|
return nil
|
|
}
|
|
|
|
type newValidatorFunc func(measurements map[uint32][]byte) atls.Validator
|