1 files changed, 41 insertions, 0 deletions
diff --git a/vendor/maunium.net/go/mautrix/crypto/backup/ephemeralkey.go b/vendor/maunium.net/go/mautrix/crypto/backup/ephemeralkey.go
new file mode 100644
index 0000000..e481e7a
--- /dev/null
+++ b/vendor/maunium.net/go/mautrix/crypto/backup/ephemeralkey.go
@@ -0,0 +1,41 @@
+// Copyright (c) 2024 Sumner Evans
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+package backup
+
+import (
+	"crypto/ecdh"
+	"encoding/base64"
+	"encoding/json"
+)
+
+// EphemeralKey is a wrapper around an ECDH X25519 public key that implements
+// JSON marshalling and unmarshalling.
+type EphemeralKey struct {
+	*ecdh.PublicKey
+}
+
+func (k *EphemeralKey) MarshalJSON() ([]byte, error) {
+	if k == nil || k.PublicKey == nil {
+		return json.Marshal(nil)
+	}
+	return json.Marshal(base64.RawStdEncoding.EncodeToString(k.Bytes()))
+}
+
+func (k *EphemeralKey) UnmarshalJSON(data []byte) error {
+	var keyStr string
+	err := json.Unmarshal(data, &keyStr)
+	if err != nil {
+		return err
+	}
+
+	keyBytes, err := base64.RawStdEncoding.DecodeString(keyStr)
+	if err != nil {
+		return err
+	}
+	k.PublicKey, err = ecdh.X25519().NewPublicKey(keyBytes)
+	return err
+}