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backup.go
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backup.go
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// Copyright 2018-2019 Shift Cryptosecurity AG
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package firmware
import (
"time"
"github.com/digitalbitbox/bitbox02-api-go/api/firmware/messages"
"github.com/digitalbitbox/bitbox02-api-go/util/errp"
)
// CreateBackup is called after SetPassword() to create the backup.
func (device *Device) CreateBackup() error {
if device.status != StatusSeeded && device.status != StatusInitialized {
return errp.New("invalid status")
}
now := time.Now()
_, offset := now.Zone()
request := &messages.Request{
Request: &messages.Request_CreateBackup{
CreateBackup: &messages.CreateBackupRequest{
Timestamp: uint32(now.Unix()),
TimezoneOffset: int32(offset),
},
},
}
response, err := device.query(request)
if err != nil {
return err
}
_, ok := response.Response.(*messages.Response_Success)
if !ok {
return errp.New("unexpected response")
}
if device.status == StatusSeeded {
device.changeStatus(StatusInitialized)
}
return nil
}
// Backup contains the metadata of one backup.
type Backup struct {
ID string
Name string
Time time.Time
}
// ListBackups returns a list of all backups on the SD card.
func (device *Device) ListBackups() ([]*Backup, error) {
request := &messages.Request{
Request: &messages.Request_ListBackups{
ListBackups: &messages.ListBackupsRequest{},
},
}
response, err := device.query(request)
if err != nil {
return nil, err
}
listBackupsResponse, ok := response.Response.(*messages.Response_ListBackups)
if !ok {
return nil, errp.New("unexpected response")
}
msgBackups := listBackupsResponse.ListBackups.Info
backups := make([]*Backup, len(msgBackups))
for index, msgBackup := range msgBackups {
backups[index] = &Backup{
ID: msgBackup.Id,
Name: msgBackup.Name,
Time: time.Unix(int64(msgBackup.Timestamp), 0).Local(),
}
}
return backups, nil
}
// CheckBackup checks if any backup on the SD card matches the current seed on the device
// and returns the name and ID of the matching backup.
func (device *Device) CheckBackup(silent bool) (string, error) {
request := &messages.Request{
Request: &messages.Request_CheckBackup{
CheckBackup: &messages.CheckBackupRequest{
Silent: silent,
},
},
}
response, err := device.query(request)
if err != nil {
return "", err
}
backup, ok := response.Response.(*messages.Response_CheckBackup)
if !ok {
return "", errp.New("unexpected response")
}
return backup.CheckBackup.Id, nil
}
// RestoreBackup restores a backup returned by ListBackups (id).
func (device *Device) RestoreBackup(id string) error {
now := time.Now()
_, offset := now.Zone()
request := &messages.Request{
Request: &messages.Request_RestoreBackup{
RestoreBackup: &messages.RestoreBackupRequest{
Id: id,
Timestamp: uint32(now.Unix()),
TimezoneOffset: int32(offset),
},
},
}
response, err := device.query(request)
if err != nil {
return err
}
_, ok := response.Response.(*messages.Response_Success)
if !ok {
return errp.New("unexpected response")
}
device.changeStatus(StatusInitialized)
return nil
}