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https://github.com/ProtonMail/proton-bridge.git
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03c3404044
This helps the export tool to deal with problems arising from message assembly after everything has been successfully encrypted. The original behavior is still available under `DecryptAndBuildRFC822`.
98 lines
2.5 KiB
Go
98 lines
2.5 KiB
Go
// Copyright (c) 2023 Proton AG
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//
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// This file is part of Proton Mail Bridge.
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//
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// Proton Mail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Proton Mail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package message
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import (
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"fmt"
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"mime"
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"github.com/ProtonMail/go-proton-api"
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"github.com/ProtonMail/gopenpgp/v2/constants"
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"github.com/ProtonMail/gopenpgp/v2/crypto"
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"github.com/emersion/go-message"
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)
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// writeCustomTextPart writes an armored-PGP text part for a message body that couldn't be decrypted.
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func writeCustomTextPart(
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w *message.Writer,
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decrypted *DecryptedMessage,
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decError error,
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) error {
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enc, err := crypto.NewPGPMessageFromArmored(decrypted.Msg.Body)
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if err != nil {
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return err
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}
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arm, err := enc.GetArmoredWithCustomHeaders(
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fmt.Sprintf("This message could not be decrypted: %v", decError),
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constants.ArmorHeaderVersion,
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)
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if err != nil {
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return err
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}
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var hdr message.Header
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hdr.SetContentType(string(decrypted.Msg.MIMEType), nil)
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part, err := w.CreatePart(hdr)
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if err != nil {
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return err
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}
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if _, err := part.Write([]byte(arm)); err != nil {
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return err
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}
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return nil
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}
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// writeCustomAttachmentPart writes an armored-PGP data part for an attachment that couldn't be decrypted.
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func writeCustomAttachmentPart(
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w *message.Writer,
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att proton.Attachment,
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msg *crypto.PGPMessage,
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decError error,
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) error {
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arm, err := msg.GetArmoredWithCustomHeaders(
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fmt.Sprintf("This attachment could not be decrypted: %v", decError),
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constants.ArmorHeaderVersion,
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)
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if err != nil {
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return err
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}
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filename := mime.QEncoding.Encode("utf-8", att.Name+".pgp")
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var hdr message.Header
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hdr.SetContentType("application/octet-stream", map[string]string{"name": filename})
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hdr.SetContentDisposition(string(att.Disposition), map[string]string{"filename": filename})
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part, err := w.CreatePart(hdr)
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if err != nil {
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return err
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}
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if _, err := part.Write([]byte(arm)); err != nil {
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return err
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}
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return part.Close()
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}
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