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// 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"
"crypto/rand"
)
// MegolmBackupKey is a wrapper around an ECDH X25519 private key that is used
// to decrypt a megolm key backup.
type MegolmBackupKey struct {
*ecdh.PrivateKey
}
func NewMegolmBackupKey() (*MegolmBackupKey, error) {
key, err := ecdh.X25519().GenerateKey(rand.Reader)
if err != nil {
return nil, err
}
return &MegolmBackupKey{key}, nil
}
func MegolmBackupKeyFromBytes(bytes []byte) (*MegolmBackupKey, error) {
key, err := ecdh.X25519().NewPrivateKey(bytes)
if err != nil {
return nil, err
}
return &MegolmBackupKey{key}, nil
}
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