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75 lines
2.2 KiB
75 lines
2.2 KiB
// Copyright (c) 2020 Proton Technologies AG |
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// |
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// This file is part of ProtonMail Bridge. |
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// |
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// ProtonMail 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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// ProtonMail 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 ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package message |
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import ( |
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"encoding/base64" |
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"fmt" |
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"io" |
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"mime/quotedprintable" |
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pmcrypto "github.com/ProtonMail/gopenpgp/crypto" |
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"github.com/ProtonMail/proton-bridge/pkg/pmapi" |
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"github.com/emersion/go-textwrapper" |
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openpgperrors "golang.org/x/crypto/openpgp/errors" |
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) |
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func WriteBody(w io.Writer, kr *pmcrypto.KeyRing, m *pmapi.Message) error { |
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// Decrypt body. |
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if err := m.Decrypt(kr); err != nil && err != openpgperrors.ErrSignatureExpired { |
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return err |
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} |
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if m.MIMEType != pmapi.ContentTypeMultipartMixed { |
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// Encode it. |
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qp := quotedprintable.NewWriter(w) |
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if _, err := io.WriteString(qp, m.Body); err != nil { |
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return err |
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} |
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return qp.Close() |
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} |
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_, err := io.WriteString(w, m.Body) |
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return err |
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} |
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func WriteAttachmentBody(w io.Writer, kr *pmcrypto.KeyRing, m *pmapi.Message, att *pmapi.Attachment, r io.Reader) (err error) { |
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// Decrypt it |
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var dr io.Reader |
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dr, err = att.Decrypt(r, kr) |
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if err == openpgperrors.ErrKeyIncorrect { |
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// Do not fail if attachment is encrypted with a different key. |
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dr = r |
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err = nil |
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att.Name += ".gpg" |
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att.MIMEType = "application/pgp-encrypted" |
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} else if err != nil && err != openpgperrors.ErrSignatureExpired { |
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err = fmt.Errorf("cannot decrypt attachment: %v", err) |
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return |
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} |
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// Encode it. |
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ww := textwrapper.NewRFC822(w) |
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bw := base64.NewEncoder(base64.StdEncoding, ww) |
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var n int64 |
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if n, err = io.Copy(bw, dr); err != nil { |
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err = fmt.Errorf("cannot write attachment: %v (wrote %v bytes)", err, n) |
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} |
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_ = bw.Close() |
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return |
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}
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