GoToSocial/internal/trans/encoders.go

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/*
GoToSocial
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package trans
import (
"context"
"crypto/x509"
"encoding/json"
"encoding/pem"
"errors"
"fmt"
"os"
transmodel "github.com/superseriousbusiness/gotosocial/internal/trans/model"
)
// accountEncode handles special fields like private + public keys on accounts
func (e *exporter) accountEncode(ctx context.Context, f *os.File, a *transmodel.Account) error {
a.Type = transmodel.TransAccount
// marshal public key
encodedPublicKey := x509.MarshalPKCS1PublicKey(a.PublicKey)
if encodedPublicKey == nil {
return errors.New("could not MarshalPKCS1PublicKey")
}
publicKeyBytes := pem.EncodeToMemory(&pem.Block{
Type: "RSA PUBLIC KEY",
Bytes: encodedPublicKey,
})
a.PublicKeyString = string(publicKeyBytes)
if a.Domain == "" {
// marshal private key for local account
encodedPrivateKey := x509.MarshalPKCS1PrivateKey(a.PrivateKey)
if encodedPrivateKey == nil {
return errors.New("could not MarshalPKCS1PrivateKey")
}
privateKeyBytes := pem.EncodeToMemory(&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: encodedPrivateKey,
})
a.PrivateKeyString = string(privateKeyBytes)
}
return e.simpleEncode(ctx, f, a, a.ID)
}
// simpleEncode can be used for any type that doesn't have special keys which need handling differently,
// or for types where special keys have already been handled.
//
// Beware, the 'type' key on the passed interface should already have been set, since simpleEncode won't know
// what type it is! If you try to decode stuff you've encoded with a missing type key, you're going to have a bad time.
func (e *exporter) simpleEncode(ctx context.Context, file *os.File, i interface{}, id string) error {
_, alreadyWritten := e.writtenIDs[id]
if alreadyWritten {
// this exporter has already exported an entry with this ID, no need to do it twice
return nil
}
err := json.NewEncoder(file).Encode(i)
if err != nil {
return fmt.Errorf("simpleEncode: error encoding entry with id %s: %s", id, err)
}
e.writtenIDs[id] = true
return nil
}