secure-enclave-unlocker (#24)

Co-authored-by: clawbot <clawbot@eeqj.de>
Reviewed-on: #24
Reviewed-by: clawbot <clawbot@noreply.example.org>
Co-authored-by: sneak <sneak@sneak.berlin>
Co-committed-by: sneak <sneak@sneak.berlin>

internal/secret/seunlocker_stub.go

@@ -0,0 +1,84 @@
+//go:build !darwin
+// +build !darwin
+
+package secret
+
+import (
+	"fmt"
+
+	"filippo.io/age"
+	"github.com/spf13/afero"
+)
+
+var errSENotSupported = fmt.Errorf(
+	"secure enclave unlockers are only supported on macOS",
+)
+
+// SecureEnclaveUnlockerMetadata is a stub for non-Darwin platforms.
+type SecureEnclaveUnlockerMetadata struct {
+	UnlockerMetadata
+	SEKeyLabel string `json:"seKeyLabel"`
+	SEKeyHash  string `json:"seKeyHash"`
+}
+
+// SecureEnclaveUnlocker is a stub for non-Darwin platforms.
+type SecureEnclaveUnlocker struct {
+	Directory string
+	Metadata  UnlockerMetadata
+	fs        afero.Fs
+}
+
+// GetIdentity returns an error on non-Darwin platforms.
+func (s *SecureEnclaveUnlocker) GetIdentity() (*age.X25519Identity, error) {
+	return nil, errSENotSupported
+}
+
+// GetType returns the unlocker type.
+func (s *SecureEnclaveUnlocker) GetType() string {
+	return "secure-enclave"
+}
+
+// GetMetadata returns the unlocker metadata.
+func (s *SecureEnclaveUnlocker) GetMetadata() UnlockerMetadata {
+	return s.Metadata
+}
+
+// GetDirectory returns the unlocker directory.
+func (s *SecureEnclaveUnlocker) GetDirectory() string {
+	return s.Directory
+}
+
+// GetID returns the unlocker ID.
+func (s *SecureEnclaveUnlocker) GetID() string {
+	return fmt.Sprintf(
+		"%s-secure-enclave",
+		s.Metadata.CreatedAt.Format("2006-01-02.15.04"),
+	)
+}
+
+// Remove returns an error on non-Darwin platforms.
+func (s *SecureEnclaveUnlocker) Remove() error {
+	return errSENotSupported
+}
+
+// NewSecureEnclaveUnlocker creates a stub SecureEnclaveUnlocker on non-Darwin platforms.
+// The returned instance's methods that require macOS functionality will return errors.
+func NewSecureEnclaveUnlocker(
+	fs afero.Fs,
+	directory string,
+	metadata UnlockerMetadata,
+) *SecureEnclaveUnlocker {
+	return &SecureEnclaveUnlocker{
+		Directory: directory,
+		Metadata:  metadata,
+		fs:        fs,
+	}
+}
+
+// CreateSecureEnclaveUnlocker returns an error on non-Darwin platforms.
+func CreateSecureEnclaveUnlocker(
+	_ afero.Fs,
+	_ string,
+) (*SecureEnclaveUnlocker, error) {
+	return nil, errSENotSupported
+}