1use std::collections::{BTreeSet, HashSet};
4use std::io::Cursor;
5
6use anyhow::{Context as _, Result, bail, ensure};
7use base64::Engine as _;
8use data_encoding::BASE32_NOPAD;
9use deltachat_contact_tools::sanitize_bidi_characters;
10use iroh_gossip::proto::TopicId;
11use mail_builder::headers::HeaderType;
12use mail_builder::headers::address::{Address, EmailAddress};
13use mail_builder::mime::MimePart;
14use tokio::fs;
15
16use crate::aheader::{Aheader, EncryptPreference};
17use crate::blob::BlobObject;
18use crate::chat::{self, Chat};
19use crate::config::Config;
20use crate::constants::ASM_SUBJECT;
21use crate::constants::{Chattype, DC_FROM_HANDSHAKE};
22use crate::contact::{Contact, ContactId, Origin};
23use crate::context::Context;
24use crate::e2ee::EncryptHelper;
25use crate::ensure_and_debug_assert;
26use crate::ephemeral::Timer as EphemeralTimer;
27use crate::headerdef::HeaderDef;
28use crate::key::{DcKey, SignedPublicKey, self_fingerprint};
29use crate::location;
30use crate::log::{info, warn};
31use crate::message::{Message, MsgId, Viewtype};
32use crate::mimeparser::{SystemMessage, is_hidden};
33use crate::param::Param;
34use crate::peer_channels::{create_iroh_header, get_iroh_topic_for_msg};
35use crate::simplify::escape_message_footer_marks;
36use crate::stock_str;
37use crate::tools::{
38 IsNoneOrEmpty, create_outgoing_rfc724_mid, create_smeared_timestamp, remove_subject_prefix,
39 time,
40};
41use crate::webxdc::StatusUpdateSerial;
42
43pub const RECOMMENDED_FILE_SIZE: u64 = 24 * 1024 * 1024 / 4 * 3;
47
48#[derive(Debug, Clone)]
49#[expect(clippy::large_enum_variant)]
50pub enum Loaded {
51 Message {
52 chat: Chat,
53 msg: Message,
54 },
55 Mdn {
56 rfc724_mid: String,
57 additional_msg_ids: Vec<String>,
58 },
59}
60
61#[derive(Debug, Clone)]
63pub struct MimeFactory {
64 from_addr: String,
65 from_displayname: String,
66
67 sender_displayname: Option<String>,
74
75 selfstatus: String,
76
77 recipients: Vec<String>,
91
92 encryption_keys: Option<Vec<(String, SignedPublicKey)>>,
98
99 to: Vec<(String, String)>,
106
107 past_members: Vec<(String, String)>,
109
110 member_fingerprints: Vec<String>,
116
117 member_timestamps: Vec<i64>,
123
124 timestamp: i64,
125 loaded: Loaded,
126 in_reply_to: String,
127
128 references: Vec<String>,
130
131 req_mdn: bool,
134
135 last_added_location_id: Option<u32>,
136
137 sync_ids_to_delete: Option<String>,
142
143 pub attach_selfavatar: bool,
145
146 webxdc_topic: Option<TopicId>,
148}
149
150#[derive(Debug, Clone)]
152pub struct RenderedEmail {
153 pub message: String,
154 pub is_encrypted: bool,
156 pub last_added_location_id: Option<u32>,
157
158 pub sync_ids_to_delete: Option<String>,
161
162 pub rfc724_mid: String,
164
165 pub subject: String,
167}
168
169fn new_address_with_name(name: &str, address: String) -> Address<'static> {
170 Address::new_address(
171 if name == address || name.is_empty() {
172 None
173 } else {
174 Some(name.to_string())
175 },
176 address,
177 )
178}
179
180impl MimeFactory {
181 pub async fn from_msg(context: &Context, msg: Message) -> Result<MimeFactory> {
182 let now = time();
183 let chat = Chat::load_from_db(context, msg.chat_id).await?;
184 let attach_profile_data = Self::should_attach_profile_data(&msg);
185 let undisclosed_recipients = chat.typ == Chattype::OutBroadcast;
186
187 let from_addr = context.get_primary_self_addr().await?;
188 let config_displayname = context
189 .get_config(Config::Displayname)
190 .await?
191 .unwrap_or_default();
192 let (from_displayname, sender_displayname) =
193 if let Some(override_name) = msg.param.get(Param::OverrideSenderDisplayname) {
194 (override_name.to_string(), Some(config_displayname))
195 } else {
196 let name = match attach_profile_data {
197 true => config_displayname,
198 false => "".to_string(),
199 };
200 (name, None)
201 };
202
203 let mut recipients = Vec::new();
204 let mut to = Vec::new();
205 let mut past_members = Vec::new();
206 let mut member_fingerprints = Vec::new();
207 let mut member_timestamps = Vec::new();
208 let mut recipient_ids = HashSet::new();
209 let mut req_mdn = false;
210
211 let encryption_keys;
212
213 let self_fingerprint = self_fingerprint(context).await?;
214
215 if chat.is_self_talk() {
216 to.push((from_displayname.to_string(), from_addr.to_string()));
217
218 encryption_keys = if msg.param.get_bool(Param::ForcePlaintext).unwrap_or(false) {
219 None
220 } else {
221 Some(Vec::new())
223 };
224 } else if chat.is_mailing_list() {
225 let list_post = chat
226 .param
227 .get(Param::ListPost)
228 .context("Can't write to mailinglist without ListPost param")?;
229 to.push(("".to_string(), list_post.to_string()));
230 recipients.push(list_post.to_string());
231
232 encryption_keys = None;
234 } else {
235 let email_to_remove = if msg.param.get_cmd() == SystemMessage::MemberRemovedFromGroup {
236 msg.param.get(Param::Arg)
237 } else {
238 None
239 };
240
241 let is_encrypted = if msg
242 .param
243 .get_bool(Param::ForcePlaintext)
244 .unwrap_or_default()
245 {
246 false
247 } else {
248 msg.param.get_bool(Param::GuaranteeE2ee).unwrap_or_default()
249 || chat.is_encrypted(context).await?
250 };
251
252 let mut keys = Vec::new();
253 let mut missing_key_addresses = BTreeSet::new();
254 context
255 .sql
256 .query_map(
261 "SELECT
262 c.authname,
263 c.addr,
264 c.fingerprint,
265 c.id,
266 cc.add_timestamp,
267 cc.remove_timestamp,
268 k.public_key
269 FROM chats_contacts cc
270 LEFT JOIN contacts c ON cc.contact_id=c.id
271 LEFT JOIN public_keys k ON k.fingerprint=c.fingerprint
272 WHERE cc.chat_id=?
273 AND (cc.contact_id>9 OR (cc.contact_id=1 AND ?))
274 ORDER BY cc.add_timestamp DESC",
275 (msg.chat_id, chat.typ == Chattype::Group),
276 |row| {
277 let authname: String = row.get(0)?;
278 let addr: String = row.get(1)?;
279 let fingerprint: String = row.get(2)?;
280 let id: ContactId = row.get(3)?;
281 let add_timestamp: i64 = row.get(4)?;
282 let remove_timestamp: i64 = row.get(5)?;
283 let public_key_bytes_opt: Option<Vec<u8>> = row.get(6)?;
284 Ok((authname, addr, fingerprint, id, add_timestamp, remove_timestamp, public_key_bytes_opt))
285 },
286 |rows| {
287 let mut past_member_timestamps = Vec::new();
288 let mut past_member_fingerprints = Vec::new();
289
290 for row in rows {
291 let (authname, addr, fingerprint, id, add_timestamp, remove_timestamp, public_key_bytes_opt) = row?;
292
293 let public_key_opt = if let Some(public_key_bytes) = &public_key_bytes_opt {
294 Some(SignedPublicKey::from_slice(public_key_bytes)?)
295 } else {
296 None
297 };
298
299 let addr = if id == ContactId::SELF {
300 from_addr.to_string()
301 } else {
302 addr
303 };
304 let name = match attach_profile_data {
305 true => authname,
306 false => "".to_string(),
307 };
308 if add_timestamp >= remove_timestamp {
309 if !recipients_contain_addr(&to, &addr) {
310 if id != ContactId::SELF {
311 recipients.push(addr.clone());
312 }
313 if !undisclosed_recipients {
314 to.push((name, addr.clone()));
315
316 if is_encrypted {
317 if !fingerprint.is_empty() {
318 member_fingerprints.push(fingerprint);
319 } else if id == ContactId::SELF {
320 member_fingerprints.push(self_fingerprint.to_string());
321 } else {
322 ensure_and_debug_assert!(member_fingerprints.is_empty(), "If some past member is a key-contact, all other past members should be key-contacts too");
323 }
324 }
325 member_timestamps.push(add_timestamp);
326 }
327 }
328 recipient_ids.insert(id);
329
330 if let Some(public_key) = public_key_opt {
331 keys.push((addr.clone(), public_key))
332 } else if id != ContactId::SELF {
333 missing_key_addresses.insert(addr.clone());
334 if is_encrypted {
335 warn!(context, "Missing key for {addr}");
336 }
337 }
338 } else if remove_timestamp.saturating_add(60 * 24 * 3600) > now {
339 if !recipients_contain_addr(&past_members, &addr) {
342 if let Some(email_to_remove) = email_to_remove {
343 if email_to_remove == addr {
344 if id != ContactId::SELF {
348 recipients.push(addr.clone());
349 }
350
351 if let Some(public_key) = public_key_opt {
352 keys.push((addr.clone(), public_key))
353 } else if id != ContactId::SELF {
354 missing_key_addresses.insert(addr.clone());
355 if is_encrypted {
356 warn!(context, "Missing key for {addr}");
357 }
358 }
359 }
360 }
361 if !undisclosed_recipients {
362 past_members.push((name, addr.clone()));
363 past_member_timestamps.push(remove_timestamp);
364
365 if is_encrypted {
366 if !fingerprint.is_empty() {
367 past_member_fingerprints.push(fingerprint);
368 } else if id == ContactId::SELF {
369 past_member_fingerprints.push(self_fingerprint.to_string());
372 } else {
373 ensure_and_debug_assert!(past_member_fingerprints.is_empty(), "If some past member is a key-contact, all other past members should be key-contacts too");
374 }
375 }
376 }
377 }
378 }
379 }
380
381 ensure_and_debug_assert!(
382 member_timestamps.len() >= to.len(),
383 "member_timestamps.len() ({}) < to.len() ({})",
384 member_timestamps.len(), to.len());
385 ensure_and_debug_assert!(
386 member_fingerprints.is_empty() || member_fingerprints.len() >= to.len(),
387 "member_fingerprints.len() ({}) < to.len() ({})",
388 member_fingerprints.len(), to.len());
389
390 if to.len() > 1 {
391 if let Some(position) = to.iter().position(|(_, x)| x == &from_addr) {
392 to.remove(position);
393 member_timestamps.remove(position);
394 if is_encrypted {
395 member_fingerprints.remove(position);
396 }
397 }
398 }
399
400 member_timestamps.extend(past_member_timestamps);
401 if is_encrypted {
402 member_fingerprints.extend(past_member_fingerprints);
403 }
404 Ok(())
405 },
406 )
407 .await?;
408 let recipient_ids: Vec<_> = recipient_ids.into_iter().collect();
409 ContactId::scaleup_origin(context, &recipient_ids, Origin::OutgoingTo).await?;
410
411 if !msg.is_system_message()
412 && msg.param.get_int(Param::Reaction).unwrap_or_default() == 0
413 && context.should_request_mdns().await?
414 {
415 req_mdn = true;
416 }
417
418 encryption_keys = if !is_encrypted {
419 None
420 } else {
421 if keys.is_empty() && !recipients.is_empty() {
422 bail!("No recipient keys are available, cannot encrypt to {recipients:?}.");
423 }
424
425 if !missing_key_addresses.is_empty() {
427 recipients.retain(|addr| !missing_key_addresses.contains(addr));
428 }
429
430 Some(keys)
431 };
432 }
433
434 let (in_reply_to, references) = context
435 .sql
436 .query_row(
437 "SELECT mime_in_reply_to, IFNULL(mime_references, '')
438 FROM msgs WHERE id=?",
439 (msg.id,),
440 |row| {
441 let in_reply_to: String = row.get(0)?;
442 let references: String = row.get(1)?;
443
444 Ok((in_reply_to, references))
445 },
446 )
447 .await?;
448 let references: Vec<String> = references
449 .trim()
450 .split_ascii_whitespace()
451 .map(|s| s.trim_start_matches('<').trim_end_matches('>').to_string())
452 .collect();
453 let selfstatus = match attach_profile_data {
454 true => context
455 .get_config(Config::Selfstatus)
456 .await?
457 .unwrap_or_default(),
458 false => "".to_string(),
459 };
460 let attach_selfavatar = Self::should_attach_selfavatar(context, &msg).await;
461
462 ensure_and_debug_assert!(
463 member_timestamps.is_empty()
464 || to.len() + past_members.len() == member_timestamps.len(),
465 "to.len() ({}) + past_members.len() ({}) != member_timestamps.len() ({})",
466 to.len(),
467 past_members.len(),
468 member_timestamps.len(),
469 );
470 let webxdc_topic = get_iroh_topic_for_msg(context, msg.id).await?;
471 let factory = MimeFactory {
472 from_addr,
473 from_displayname,
474 sender_displayname,
475 selfstatus,
476 recipients,
477 encryption_keys,
478 to,
479 past_members,
480 member_fingerprints,
481 member_timestamps,
482 timestamp: msg.timestamp_sort,
483 loaded: Loaded::Message { msg, chat },
484 in_reply_to,
485 references,
486 req_mdn,
487 last_added_location_id: None,
488 sync_ids_to_delete: None,
489 attach_selfavatar,
490 webxdc_topic,
491 };
492 Ok(factory)
493 }
494
495 pub async fn from_mdn(
496 context: &Context,
497 from_id: ContactId,
498 rfc724_mid: String,
499 additional_msg_ids: Vec<String>,
500 ) -> Result<MimeFactory> {
501 let contact = Contact::get_by_id(context, from_id).await?;
502 let from_addr = context.get_primary_self_addr().await?;
503 let timestamp = create_smeared_timestamp(context);
504
505 let addr = contact.get_addr().to_string();
506 let encryption_keys = if contact.is_key_contact() {
507 if let Some(key) = contact.public_key(context).await? {
508 Some(vec![(addr.clone(), key)])
509 } else {
510 Some(Vec::new())
511 }
512 } else {
513 None
514 };
515
516 let res = MimeFactory {
517 from_addr,
518 from_displayname: "".to_string(),
519 sender_displayname: None,
520 selfstatus: "".to_string(),
521 recipients: vec![addr],
522 encryption_keys,
523 to: vec![("".to_string(), contact.get_addr().to_string())],
524 past_members: vec![],
525 member_fingerprints: vec![],
526 member_timestamps: vec![],
527 timestamp,
528 loaded: Loaded::Mdn {
529 rfc724_mid,
530 additional_msg_ids,
531 },
532 in_reply_to: String::default(),
533 references: Vec::new(),
534 req_mdn: false,
535 last_added_location_id: None,
536 sync_ids_to_delete: None,
537 attach_selfavatar: false,
538 webxdc_topic: None,
539 };
540
541 Ok(res)
542 }
543
544 fn should_skip_autocrypt(&self) -> bool {
545 match &self.loaded {
546 Loaded::Message { msg, .. } => {
547 msg.param.get_bool(Param::SkipAutocrypt).unwrap_or_default()
548 }
549 Loaded::Mdn { .. } => false,
550 }
551 }
552
553 fn should_attach_profile_data(msg: &Message) -> bool {
554 msg.param.get_cmd() != SystemMessage::SecurejoinMessage || {
555 let step = msg.param.get(Param::Arg).unwrap_or_default();
556 step == "vg-request-with-auth"
562 || step == "vc-request-with-auth"
563 || step == "vg-member-added"
564 || step == "vc-contact-confirm"
565 }
566 }
567
568 async fn should_attach_selfavatar(context: &Context, msg: &Message) -> bool {
569 Self::should_attach_profile_data(msg)
570 && match chat::shall_attach_selfavatar(context, msg.chat_id).await {
571 Ok(should) => should,
572 Err(err) => {
573 warn!(
574 context,
575 "should_attach_selfavatar: cannot get selfavatar state: {err:#}."
576 );
577 false
578 }
579 }
580 }
581
582 fn grpimage(&self) -> Option<String> {
583 match &self.loaded {
584 Loaded::Message { chat, msg } => {
585 let cmd = msg.param.get_cmd();
586
587 match cmd {
588 SystemMessage::MemberAddedToGroup => {
589 return chat.param.get(Param::ProfileImage).map(Into::into);
590 }
591 SystemMessage::GroupImageChanged => {
592 return msg.param.get(Param::Arg).map(Into::into);
593 }
594 _ => {}
595 }
596
597 if msg
598 .param
599 .get_bool(Param::AttachGroupImage)
600 .unwrap_or_default()
601 {
602 return chat.param.get(Param::ProfileImage).map(Into::into);
603 }
604
605 None
606 }
607 Loaded::Mdn { .. } => None,
608 }
609 }
610
611 async fn subject_str(&self, context: &Context) -> Result<String> {
612 let subject = match &self.loaded {
613 Loaded::Message { chat, msg } => {
614 let quoted_msg_subject = msg.quoted_message(context).await?.map(|m| m.subject);
615
616 if !msg.subject.is_empty() {
617 return Ok(msg.subject.clone());
618 }
619
620 if (chat.typ == Chattype::Group || chat.typ == Chattype::OutBroadcast)
621 && quoted_msg_subject.is_none_or_empty()
622 {
623 let re = if self.in_reply_to.is_empty() {
624 ""
625 } else {
626 "Re: "
627 };
628 return Ok(format!("{}{}", re, chat.name));
629 }
630
631 let parent_subject = if quoted_msg_subject.is_none_or_empty() {
632 chat.param.get(Param::LastSubject)
633 } else {
634 quoted_msg_subject.as_deref()
635 };
636 if let Some(last_subject) = parent_subject {
637 return Ok(format!("Re: {}", remove_subject_prefix(last_subject)));
638 }
639
640 let self_name = match Self::should_attach_profile_data(msg) {
641 true => context.get_config(Config::Displayname).await?,
642 false => None,
643 };
644 let self_name = &match self_name {
645 Some(name) => name,
646 None => context.get_config(Config::Addr).await?.unwrap_or_default(),
647 };
648 stock_str::subject_for_new_contact(context, self_name).await
649 }
650 Loaded::Mdn { .. } => "Receipt Notification".to_string(), };
652
653 Ok(subject)
654 }
655
656 pub fn recipients(&self) -> Vec<String> {
657 self.recipients.clone()
658 }
659
660 pub async fn render(mut self, context: &Context) -> Result<RenderedEmail> {
663 let mut headers = Vec::<(&'static str, HeaderType<'static>)>::new();
664
665 let from = new_address_with_name(&self.from_displayname, self.from_addr.clone());
666
667 let mut to: Vec<Address<'static>> = Vec::new();
668 for (name, addr) in &self.to {
669 to.push(Address::new_address(
670 if name.is_empty() {
671 None
672 } else {
673 Some(name.to_string())
674 },
675 addr.clone(),
676 ));
677 }
678
679 let mut past_members: Vec<Address<'static>> = Vec::new(); for (name, addr) in &self.past_members {
681 past_members.push(Address::new_address(
682 if name.is_empty() {
683 None
684 } else {
685 Some(name.to_string())
686 },
687 addr.clone(),
688 ));
689 }
690
691 ensure_and_debug_assert!(
692 self.member_timestamps.is_empty()
693 || to.len() + past_members.len() == self.member_timestamps.len(),
694 "to.len() ({}) + past_members.len() ({}) != self.member_timestamps.len() ({})",
695 to.len(),
696 past_members.len(),
697 self.member_timestamps.len(),
698 );
699 if to.is_empty() {
700 to.push(hidden_recipients());
701 }
702
703 headers.push(("From", from.into()));
706
707 if let Some(sender_displayname) = &self.sender_displayname {
708 let sender = new_address_with_name(sender_displayname, self.from_addr.clone());
709 headers.push(("Sender", sender.into()));
710 }
711 headers.push((
712 "To",
713 mail_builder::headers::address::Address::new_list(to.clone()).into(),
714 ));
715 if !past_members.is_empty() {
716 headers.push((
717 "Chat-Group-Past-Members",
718 mail_builder::headers::address::Address::new_list(past_members.clone()).into(),
719 ));
720 }
721
722 if let Loaded::Message { chat, .. } = &self.loaded {
723 if chat.typ == Chattype::Group {
724 if !self.member_timestamps.is_empty() && !chat.member_list_is_stale(context).await?
725 {
726 headers.push((
727 "Chat-Group-Member-Timestamps",
728 mail_builder::headers::raw::Raw::new(
729 self.member_timestamps
730 .iter()
731 .map(|ts| ts.to_string())
732 .collect::<Vec<String>>()
733 .join(" "),
734 )
735 .into(),
736 ));
737 }
738
739 if !self.member_fingerprints.is_empty() {
740 headers.push((
741 "Chat-Group-Member-Fpr",
742 mail_builder::headers::raw::Raw::new(
743 self.member_fingerprints
744 .iter()
745 .map(|fp| fp.to_string())
746 .collect::<Vec<String>>()
747 .join(" "),
748 )
749 .into(),
750 ));
751 }
752 }
753 }
754
755 let subject_str = self.subject_str(context).await?;
756 headers.push((
757 "Subject",
758 mail_builder::headers::text::Text::new(subject_str.to_string()).into(),
759 ));
760
761 let date = chrono::DateTime::<chrono::Utc>::from_timestamp(self.timestamp, 0)
762 .unwrap()
763 .to_rfc2822();
764 headers.push(("Date", mail_builder::headers::raw::Raw::new(date).into()));
765
766 let rfc724_mid = match &self.loaded {
767 Loaded::Message { msg, .. } => msg.rfc724_mid.clone(),
768 Loaded::Mdn { .. } => create_outgoing_rfc724_mid(),
769 };
770 headers.push((
771 "Message-ID",
772 mail_builder::headers::message_id::MessageId::new(rfc724_mid.clone()).into(),
773 ));
774
775 if !self.in_reply_to.is_empty() {
777 headers.push((
778 "In-Reply-To",
779 mail_builder::headers::message_id::MessageId::new(self.in_reply_to.clone()).into(),
780 ));
781 }
782 if !self.references.is_empty() {
783 headers.push((
784 "References",
785 mail_builder::headers::message_id::MessageId::<'static>::new_list(
786 self.references.iter().map(|s| s.to_string()),
787 )
788 .into(),
789 ));
790 }
791
792 if let Loaded::Mdn { .. } = self.loaded {
794 headers.push((
795 "Auto-Submitted",
796 mail_builder::headers::raw::Raw::new("auto-replied".to_string()).into(),
797 ));
798 } else if context.get_config_bool(Config::Bot).await? {
799 headers.push((
800 "Auto-Submitted",
801 mail_builder::headers::raw::Raw::new("auto-generated".to_string()).into(),
802 ));
803 } else if let Loaded::Message { msg, .. } = &self.loaded {
804 if msg.param.get_cmd() == SystemMessage::SecurejoinMessage {
805 let step = msg.param.get(Param::Arg).unwrap_or_default();
806 if step != "vg-request" && step != "vc-request" {
807 headers.push((
808 "Auto-Submitted",
809 mail_builder::headers::raw::Raw::new("auto-replied".to_string()).into(),
810 ));
811 }
812 }
813 }
814
815 if let Loaded::Message { chat, .. } = &self.loaded {
816 if chat.typ == Chattype::OutBroadcast || chat.typ == Chattype::InBroadcast {
817 headers.push((
818 "List-ID",
819 mail_builder::headers::text::Text::new(format!(
820 "{} <{}>",
821 chat.name, chat.grpid
822 ))
823 .into(),
824 ));
825 }
826 }
827
828 if let Loaded::Message { msg, .. } = &self.loaded {
829 if let Some(original_rfc724_mid) = msg.param.get(Param::TextEditFor) {
830 headers.push((
831 "Chat-Edit",
832 mail_builder::headers::message_id::MessageId::new(
833 original_rfc724_mid.to_string(),
834 )
835 .into(),
836 ));
837 } else if let Some(rfc724_mid_list) = msg.param.get(Param::DeleteRequestFor) {
838 headers.push((
839 "Chat-Delete",
840 mail_builder::headers::message_id::MessageId::new(rfc724_mid_list.to_string())
841 .into(),
842 ));
843 }
844 }
845
846 headers.push((
848 "Chat-Version",
849 mail_builder::headers::raw::Raw::new("1.0").into(),
850 ));
851
852 if self.req_mdn {
853 headers.push((
857 "Chat-Disposition-Notification-To",
858 mail_builder::headers::raw::Raw::new(self.from_addr.clone()).into(),
859 ));
860 }
861
862 let grpimage = self.grpimage();
863 let skip_autocrypt = self.should_skip_autocrypt();
864 let encrypt_helper = EncryptHelper::new(context).await?;
865
866 if !skip_autocrypt {
867 let aheader = encrypt_helper.get_aheader().to_string();
869 headers.push((
870 "Autocrypt",
871 mail_builder::headers::raw::Raw::new(aheader).into(),
872 ));
873 }
874
875 let is_encrypted = self.encryption_keys.is_some();
876
877 if let Loaded::Message { msg, .. } = &self.loaded {
881 let ephemeral_timer = msg.chat_id.get_ephemeral_timer(context).await?;
882 if let EphemeralTimer::Enabled { duration } = ephemeral_timer {
883 headers.push((
884 "Ephemeral-Timer",
885 mail_builder::headers::raw::Raw::new(duration.to_string()).into(),
886 ));
887 }
888 }
889
890 let is_securejoin_message = if let Loaded::Message { msg, .. } = &self.loaded {
891 msg.param.get_cmd() == SystemMessage::SecurejoinMessage
892 } else {
893 false
894 };
895
896 let message: MimePart<'static> = match &self.loaded {
897 Loaded::Message { msg, .. } => {
898 let msg = msg.clone();
899 let (main_part, mut parts) = self
900 .render_message(context, &mut headers, &grpimage, is_encrypted)
901 .await?;
902 if parts.is_empty() {
903 main_part
905 } else {
906 parts.insert(0, main_part);
907
908 if msg.param.get_cmd() == SystemMessage::MultiDeviceSync {
910 MimePart::new("multipart/report; report-type=multi-device-sync", parts)
911 } else if msg.param.get_cmd() == SystemMessage::WebxdcStatusUpdate {
912 MimePart::new("multipart/report; report-type=status-update", parts)
913 } else {
914 MimePart::new("multipart/mixed", parts)
915 }
916 }
917 }
918 Loaded::Mdn { .. } => self.render_mdn()?,
919 };
920
921 let mut unprotected_headers: Vec<(&'static str, HeaderType<'static>)> = Vec::new();
930
931 let mut hidden_headers: Vec<(&'static str, HeaderType<'static>)> = Vec::new();
944
945 let mut protected_headers: Vec<(&'static str, HeaderType<'static>)> = Vec::new();
954
955 unprotected_headers.push((
957 "MIME-Version",
958 mail_builder::headers::raw::Raw::new("1.0").into(),
959 ));
960 for header @ (original_header_name, _header_value) in &headers {
961 let header_name = original_header_name.to_lowercase();
962 if header_name == "message-id" {
963 unprotected_headers.push(header.clone());
964 hidden_headers.push(header.clone());
965 } else if is_hidden(&header_name) {
966 hidden_headers.push(header.clone());
967 } else if header_name == "autocrypt"
968 && !context.get_config_bool(Config::ProtectAutocrypt).await?
969 {
970 unprotected_headers.push(header.clone());
971 } else if header_name == "from" {
972 if is_encrypted || !is_securejoin_message {
974 protected_headers.push(header.clone());
975 }
976
977 unprotected_headers.push((
978 original_header_name,
979 Address::new_address(None::<&'static str>, self.from_addr.clone()).into(),
980 ));
981 } else if header_name == "to" {
982 protected_headers.push(header.clone());
983 if is_encrypted {
984 let mut to_without_names = to
985 .clone()
986 .into_iter()
987 .filter_map(|header| match header {
988 Address::Address(mb) => Some(Address::Address(EmailAddress {
989 name: None,
990 email: mb.email,
991 })),
992 _ => None,
993 })
994 .collect::<Vec<_>>();
995 if to_without_names.is_empty() {
996 to_without_names.push(hidden_recipients());
997 }
998 unprotected_headers.push((
999 original_header_name,
1000 Address::new_list(to_without_names).into(),
1001 ));
1002 } else {
1003 unprotected_headers.push(header.clone());
1004 }
1005 } else if is_encrypted {
1006 protected_headers.push(header.clone());
1007
1008 match header_name.as_str() {
1009 "subject" => {
1010 unprotected_headers.push((
1011 "Subject",
1012 mail_builder::headers::raw::Raw::new("[...]").into(),
1013 ));
1014 }
1015 "date"
1016 | "in-reply-to"
1017 | "references"
1018 | "auto-submitted"
1019 | "chat-version"
1020 | "autocrypt-setup-message" => {
1021 unprotected_headers.push(header.clone());
1022 }
1023 _ => {
1024 }
1026 }
1027 } else {
1028 protected_headers.push(header.clone());
1032 unprotected_headers.push(header.clone())
1033 }
1034 }
1035
1036 let outer_message = if let Some(encryption_keys) = self.encryption_keys {
1037 let message = protected_headers
1039 .into_iter()
1040 .fold(message, |message, (header, value)| {
1041 message.header(header, value)
1042 });
1043
1044 let mut message: MimePart<'static> = hidden_headers
1046 .into_iter()
1047 .fold(message, |message, (header, value)| {
1048 message.header(header, value)
1049 });
1050
1051 let multiple_recipients =
1053 encryption_keys.len() > 1 || context.get_config_bool(Config::BccSelf).await?;
1054
1055 let gossip_period = context.get_config_i64(Config::GossipPeriod).await?;
1056 let now = time();
1057
1058 match &self.loaded {
1059 Loaded::Message { chat, msg } => {
1060 if chat.typ != Chattype::OutBroadcast {
1061 for (addr, key) in &encryption_keys {
1062 let fingerprint = key.dc_fingerprint().hex();
1063 let cmd = msg.param.get_cmd();
1064 let should_do_gossip = cmd == SystemMessage::MemberAddedToGroup
1065 || cmd == SystemMessage::SecurejoinMessage
1066 || multiple_recipients && {
1067 let gossiped_timestamp: Option<i64> = context
1068 .sql
1069 .query_get_value(
1070 "SELECT timestamp
1071 FROM gossip_timestamp
1072 WHERE chat_id=? AND fingerprint=?",
1073 (chat.id, &fingerprint),
1074 )
1075 .await?;
1076
1077 gossip_period == 0
1084 || gossiped_timestamp
1085 .is_none_or(|ts| now >= ts + gossip_period || now < ts)
1086 };
1087
1088 if !should_do_gossip {
1089 continue;
1090 }
1091
1092 let header = Aheader {
1093 addr: addr.clone(),
1094 public_key: key.clone(),
1095 prefer_encrypt: EncryptPreference::NoPreference,
1098 verified: false,
1099 }
1100 .to_string();
1101
1102 message = message.header(
1103 "Autocrypt-Gossip",
1104 mail_builder::headers::raw::Raw::new(header),
1105 );
1106
1107 context
1108 .sql
1109 .execute(
1110 "INSERT INTO gossip_timestamp (chat_id, fingerprint, timestamp)
1111 VALUES (?, ?, ?)
1112 ON CONFLICT (chat_id, fingerprint)
1113 DO UPDATE SET timestamp=excluded.timestamp",
1114 (chat.id, &fingerprint, now),
1115 )
1116 .await?;
1117 }
1118 }
1119 }
1120 Loaded::Mdn { .. } => {
1121 }
1123 }
1124
1125 for (h, v) in &mut message.headers {
1127 if h == "Content-Type" {
1128 if let mail_builder::headers::HeaderType::ContentType(ct) = v {
1129 *ct = ct.clone().attribute("protected-headers", "v1");
1130 }
1131 }
1132 }
1133
1134 let compress = match &self.loaded {
1138 Loaded::Message { msg, .. } => {
1139 msg.param.get_cmd() != SystemMessage::SecurejoinMessage
1140 }
1141 Loaded::Mdn { .. } => true,
1142 };
1143
1144 let mut encryption_keyring = vec![encrypt_helper.public_key.clone()];
1147 encryption_keyring.extend(encryption_keys.iter().map(|(_addr, key)| (*key).clone()));
1148
1149 let encrypted = encrypt_helper
1153 .encrypt(context, encryption_keyring, message, compress)
1154 .await?
1155 + "\n";
1156
1157 MimePart::new(
1159 "multipart/encrypted; protocol=\"application/pgp-encrypted\"",
1160 vec![
1161 MimePart::new("application/pgp-encrypted", "Version: 1\r\n").header(
1163 "Content-Description",
1164 mail_builder::headers::raw::Raw::new("PGP/MIME version identification"),
1165 ),
1166 MimePart::new(
1168 "application/octet-stream; name=\"encrypted.asc\"",
1169 encrypted,
1170 )
1171 .header(
1172 "Content-Description",
1173 mail_builder::headers::raw::Raw::new("OpenPGP encrypted message"),
1174 )
1175 .header(
1176 "Content-Disposition",
1177 mail_builder::headers::raw::Raw::new("inline; filename=\"encrypted.asc\";"),
1178 ),
1179 ],
1180 )
1181 } else if matches!(self.loaded, Loaded::Mdn { .. }) {
1182 message
1191 } else {
1192 let message = hidden_headers
1193 .into_iter()
1194 .fold(message, |message, (header, value)| {
1195 message.header(header, value)
1196 });
1197 let message = MimePart::new("multipart/mixed", vec![message]);
1198 let mut message = protected_headers
1199 .iter()
1200 .fold(message, |message, (header, value)| {
1201 message.header(*header, value.clone())
1202 });
1203
1204 if skip_autocrypt || !context.get_config_bool(Config::SignUnencrypted).await? {
1205 let protected: HashSet<&str> =
1207 HashSet::from_iter(protected_headers.iter().map(|(header, _value)| *header));
1208 unprotected_headers.retain(|(header, _value)| !protected.contains(header));
1209
1210 message
1211 } else {
1212 for (h, v) in &mut message.headers {
1213 if h == "Content-Type" {
1214 if let mail_builder::headers::HeaderType::ContentType(ct) = v {
1215 *ct = ct.clone().attribute("protected-headers", "v1");
1216 }
1217 }
1218 }
1219
1220 let signature = encrypt_helper.sign(context, &message).await?;
1221 MimePart::new(
1222 "multipart/signed; protocol=\"application/pgp-signature\"; protected",
1223 vec![
1224 message,
1225 MimePart::new(
1226 "application/pgp-signature; name=\"signature.asc\"",
1227 signature,
1228 )
1229 .header(
1230 "Content-Description",
1231 mail_builder::headers::raw::Raw::<'static>::new(
1232 "OpenPGP digital signature",
1233 ),
1234 )
1235 .attachment("signature"),
1236 ],
1237 )
1238 }
1239 };
1240
1241 let outer_message = unprotected_headers
1243 .into_iter()
1244 .fold(outer_message, |message, (header, value)| {
1245 message.header(header, value)
1246 });
1247
1248 let MimeFactory {
1249 last_added_location_id,
1250 ..
1251 } = self;
1252
1253 let mut buffer = Vec::new();
1254 let cursor = Cursor::new(&mut buffer);
1255 outer_message.clone().write_part(cursor).ok();
1256 let message = String::from_utf8_lossy(&buffer).to_string();
1257
1258 Ok(RenderedEmail {
1259 message,
1260 is_encrypted,
1262 last_added_location_id,
1263 sync_ids_to_delete: self.sync_ids_to_delete,
1264 rfc724_mid,
1265 subject: subject_str,
1266 })
1267 }
1268
1269 fn get_message_kml_part(&self) -> Option<MimePart<'static>> {
1271 let Loaded::Message { msg, .. } = &self.loaded else {
1272 return None;
1273 };
1274
1275 let latitude = msg.param.get_float(Param::SetLatitude)?;
1276 let longitude = msg.param.get_float(Param::SetLongitude)?;
1277
1278 let kml_file = location::get_message_kml(msg.timestamp_sort, latitude, longitude);
1279 let part = MimePart::new("application/vnd.google-earth.kml+xml", kml_file)
1280 .attachment("message.kml");
1281 Some(part)
1282 }
1283
1284 async fn get_location_kml_part(
1286 &mut self,
1287 context: &Context,
1288 ) -> Result<Option<MimePart<'static>>> {
1289 let Loaded::Message { msg, .. } = &self.loaded else {
1290 return Ok(None);
1291 };
1292
1293 let Some((kml_content, last_added_location_id)) =
1294 location::get_kml(context, msg.chat_id).await?
1295 else {
1296 return Ok(None);
1297 };
1298
1299 let part = MimePart::new("application/vnd.google-earth.kml+xml", kml_content)
1300 .attachment("location.kml");
1301 if !msg.param.exists(Param::SetLatitude) {
1302 self.last_added_location_id = Some(last_added_location_id);
1304 }
1305 Ok(Some(part))
1306 }
1307
1308 async fn render_message(
1309 &mut self,
1310 context: &Context,
1311 headers: &mut Vec<(&'static str, HeaderType<'static>)>,
1312 grpimage: &Option<String>,
1313 is_encrypted: bool,
1314 ) -> Result<(MimePart<'static>, Vec<MimePart<'static>>)> {
1315 let Loaded::Message { chat, msg } = &self.loaded else {
1316 bail!("Attempt to render MDN as a message");
1317 };
1318 let chat = chat.clone();
1319 let msg = msg.clone();
1320 let command = msg.param.get_cmd();
1321 let mut placeholdertext = None;
1322
1323 let send_verified_headers = match chat.typ {
1324 Chattype::Single => true,
1325 Chattype::Group => true,
1326 Chattype::Mailinglist => false,
1328 Chattype::OutBroadcast | Chattype::InBroadcast => false,
1329 };
1330 if chat.is_protected() && send_verified_headers {
1331 headers.push((
1332 "Chat-Verified",
1333 mail_builder::headers::raw::Raw::new("1").into(),
1334 ));
1335 }
1336
1337 if chat.typ == Chattype::Group {
1338 if !chat.grpid.is_empty() {
1340 headers.push((
1341 "Chat-Group-ID",
1342 mail_builder::headers::raw::Raw::new(chat.grpid.clone()).into(),
1343 ));
1344 }
1345 }
1346
1347 if chat.typ == Chattype::Group
1348 || chat.typ == Chattype::OutBroadcast
1349 || chat.typ == Chattype::InBroadcast
1350 {
1351 headers.push((
1352 "Chat-Group-Name",
1353 mail_builder::headers::text::Text::new(chat.name.to_string()).into(),
1354 ));
1355 if let Some(ts) = chat.param.get_i64(Param::GroupNameTimestamp) {
1356 headers.push((
1357 "Chat-Group-Name-Timestamp",
1358 mail_builder::headers::text::Text::new(ts.to_string()).into(),
1359 ));
1360 }
1361
1362 match command {
1363 SystemMessage::MemberRemovedFromGroup => {
1364 ensure!(chat.typ != Chattype::OutBroadcast);
1365 let email_to_remove = msg.param.get(Param::Arg).unwrap_or_default();
1366
1367 if email_to_remove
1368 == context
1369 .get_config(Config::ConfiguredAddr)
1370 .await?
1371 .unwrap_or_default()
1372 {
1373 placeholdertext = Some(stock_str::msg_group_left_remote(context).await);
1374 } else {
1375 placeholdertext =
1376 Some(stock_str::msg_del_member_remote(context, email_to_remove).await);
1377 };
1378
1379 if !email_to_remove.is_empty() {
1380 headers.push((
1381 "Chat-Group-Member-Removed",
1382 mail_builder::headers::raw::Raw::new(email_to_remove.to_string())
1383 .into(),
1384 ));
1385 }
1386 }
1387 SystemMessage::MemberAddedToGroup => {
1388 ensure!(chat.typ != Chattype::OutBroadcast);
1389 let email_to_add = msg.param.get(Param::Arg).unwrap_or_default();
1392 placeholdertext =
1393 Some(stock_str::msg_add_member_remote(context, email_to_add).await);
1394
1395 if !email_to_add.is_empty() {
1396 headers.push((
1397 "Chat-Group-Member-Added",
1398 mail_builder::headers::raw::Raw::new(email_to_add.to_string()).into(),
1399 ));
1400 }
1401 if 0 != msg.param.get_int(Param::Arg2).unwrap_or_default() & DC_FROM_HANDSHAKE {
1402 info!(
1403 context,
1404 "Sending secure-join message {:?}.", "vg-member-added",
1405 );
1406 headers.push((
1407 "Secure-Join",
1408 mail_builder::headers::raw::Raw::new("vg-member-added".to_string())
1409 .into(),
1410 ));
1411 }
1412 }
1413 SystemMessage::GroupNameChanged => {
1414 let old_name = msg.param.get(Param::Arg).unwrap_or_default().to_string();
1415 headers.push((
1416 "Chat-Group-Name-Changed",
1417 mail_builder::headers::text::Text::new(old_name).into(),
1418 ));
1419 }
1420 SystemMessage::GroupImageChanged => {
1421 headers.push((
1422 "Chat-Content",
1423 mail_builder::headers::text::Text::new("group-avatar-changed").into(),
1424 ));
1425 if grpimage.is_none() {
1426 headers.push((
1427 "Chat-Group-Avatar",
1428 mail_builder::headers::raw::Raw::new("0").into(),
1429 ));
1430 }
1431 }
1432 _ => {}
1433 }
1434 }
1435
1436 match command {
1437 SystemMessage::LocationStreamingEnabled => {
1438 headers.push((
1439 "Chat-Content",
1440 mail_builder::headers::raw::Raw::new("location-streaming-enabled").into(),
1441 ));
1442 }
1443 SystemMessage::EphemeralTimerChanged => {
1444 headers.push((
1445 "Chat-Content",
1446 mail_builder::headers::raw::Raw::new("ephemeral-timer-changed").into(),
1447 ));
1448 }
1449 SystemMessage::LocationOnly
1450 | SystemMessage::MultiDeviceSync
1451 | SystemMessage::WebxdcStatusUpdate => {
1452 headers.push((
1461 "Auto-Submitted",
1462 mail_builder::headers::raw::Raw::new("auto-generated").into(),
1463 ));
1464 }
1465 SystemMessage::AutocryptSetupMessage => {
1466 headers.push((
1467 "Autocrypt-Setup-Message",
1468 mail_builder::headers::raw::Raw::new("v1").into(),
1469 ));
1470
1471 placeholdertext = Some(ASM_SUBJECT.to_string());
1472 }
1473 SystemMessage::SecurejoinMessage => {
1474 let step = msg.param.get(Param::Arg).unwrap_or_default();
1475 if !step.is_empty() {
1476 info!(context, "Sending secure-join message {step:?}.");
1477 headers.push((
1478 "Secure-Join",
1479 mail_builder::headers::raw::Raw::new(step.to_string()).into(),
1480 ));
1481
1482 let param2 = msg.param.get(Param::Arg2).unwrap_or_default();
1483 if !param2.is_empty() {
1484 headers.push((
1485 if step == "vg-request-with-auth" || step == "vc-request-with-auth" {
1486 "Secure-Join-Auth"
1487 } else {
1488 "Secure-Join-Invitenumber"
1489 },
1490 mail_builder::headers::text::Text::new(param2.to_string()).into(),
1491 ));
1492 }
1493
1494 let fingerprint = msg.param.get(Param::Arg3).unwrap_or_default();
1495 if !fingerprint.is_empty() {
1496 headers.push((
1497 "Secure-Join-Fingerprint",
1498 mail_builder::headers::raw::Raw::new(fingerprint.to_string()).into(),
1499 ));
1500 }
1501 if let Some(id) = msg.param.get(Param::Arg4) {
1502 headers.push((
1503 "Secure-Join-Group",
1504 mail_builder::headers::raw::Raw::new(id.to_string()).into(),
1505 ));
1506 };
1507 }
1508 }
1509 SystemMessage::ChatProtectionEnabled => {
1510 headers.push((
1511 "Chat-Content",
1512 mail_builder::headers::raw::Raw::new("protection-enabled").into(),
1513 ));
1514 }
1515 SystemMessage::ChatProtectionDisabled => {
1516 headers.push((
1517 "Chat-Content",
1518 mail_builder::headers::raw::Raw::new("protection-disabled").into(),
1519 ));
1520 }
1521 SystemMessage::IrohNodeAddr => {
1522 let node_addr = context
1523 .get_or_try_init_peer_channel()
1524 .await?
1525 .get_node_addr()
1526 .await?;
1527
1528 debug_assert!(node_addr.relay_url().is_some());
1531 headers.push((
1532 HeaderDef::IrohNodeAddr.into(),
1533 mail_builder::headers::text::Text::new(serde_json::to_string(&node_addr)?)
1534 .into(),
1535 ));
1536 }
1537 SystemMessage::CallAccepted => {
1538 headers.push((
1539 "Chat-Content",
1540 mail_builder::headers::raw::Raw::new("call-accepted").into(),
1541 ));
1542 }
1543 SystemMessage::CallEnded => {
1544 headers.push((
1545 "Chat-Content",
1546 mail_builder::headers::raw::Raw::new("call-ended").into(),
1547 ));
1548 }
1549 _ => {}
1550 }
1551
1552 if let Some(grpimage) = grpimage {
1553 info!(context, "setting group image '{}'", grpimage);
1554 let avatar = build_avatar_file(context, grpimage)
1555 .await
1556 .context("Cannot attach group image")?;
1557 headers.push((
1558 "Chat-Group-Avatar",
1559 mail_builder::headers::raw::Raw::new(format!("base64:{avatar}")).into(),
1560 ));
1561 }
1562
1563 if msg.viewtype == Viewtype::Sticker {
1564 headers.push((
1565 "Chat-Content",
1566 mail_builder::headers::raw::Raw::new("sticker").into(),
1567 ));
1568 } else if msg.viewtype == Viewtype::Call {
1569 headers.push((
1570 "Chat-Content",
1571 mail_builder::headers::raw::Raw::new("call").into(),
1572 ));
1573 placeholdertext = Some(
1574 "[This is a 'Call'. The sender uses an experiment not supported on your version yet]".to_string(),
1575 );
1576 }
1577
1578 if let Some(offer) = msg.param.get(Param::WebrtcRoom) {
1579 headers.push((
1580 "Chat-Webrtc-Room",
1581 mail_builder::headers::raw::Raw::new(b_encode(offer)).into(),
1582 ));
1583 } else if let Some(answer) = msg.param.get(Param::WebrtcAccepted) {
1584 headers.push((
1585 "Chat-Webrtc-Accepted",
1586 mail_builder::headers::raw::Raw::new(b_encode(answer)).into(),
1587 ));
1588 }
1589
1590 if msg.viewtype == Viewtype::Voice
1591 || msg.viewtype == Viewtype::Audio
1592 || msg.viewtype == Viewtype::Video
1593 {
1594 if msg.viewtype == Viewtype::Voice {
1595 headers.push((
1596 "Chat-Voice-Message",
1597 mail_builder::headers::raw::Raw::new("1").into(),
1598 ));
1599 }
1600 let duration_ms = msg.param.get_int(Param::Duration).unwrap_or_default();
1601 if duration_ms > 0 {
1602 let dur = duration_ms.to_string();
1603 headers.push((
1604 "Chat-Duration",
1605 mail_builder::headers::raw::Raw::new(dur).into(),
1606 ));
1607 }
1608 }
1609
1610 let afwd_email = msg.param.exists(Param::Forwarded);
1616 let fwdhint = if afwd_email {
1617 Some(
1618 "---------- Forwarded message ----------\r\n\
1619 From: Delta Chat\r\n\
1620 \r\n"
1621 .to_string(),
1622 )
1623 } else {
1624 None
1625 };
1626
1627 let final_text = placeholdertext.as_deref().unwrap_or(&msg.text);
1628
1629 let mut quoted_text = None;
1630 if let Some(msg_quoted_text) = msg.quoted_text() {
1631 let mut some_quoted_text = String::new();
1632 for quoted_line in msg_quoted_text.split('\n') {
1633 some_quoted_text += "> ";
1634 some_quoted_text += quoted_line;
1635 some_quoted_text += "\r\n";
1636 }
1637 some_quoted_text += "\r\n";
1638 quoted_text = Some(some_quoted_text)
1639 }
1640
1641 if !is_encrypted && msg.param.get_bool(Param::ProtectQuote).unwrap_or_default() {
1642 quoted_text = Some("> ...\r\n\r\n".to_string());
1644 }
1645 if quoted_text.is_none() && final_text.starts_with('>') {
1646 quoted_text = Some("\r\n".to_string());
1649 }
1650
1651 let is_reaction = msg.param.get_int(Param::Reaction).unwrap_or_default() != 0;
1652
1653 let footer = if is_reaction { "" } else { &self.selfstatus };
1654
1655 let message_text = format!(
1656 "{}{}{}{}{}{}",
1657 fwdhint.unwrap_or_default(),
1658 quoted_text.unwrap_or_default(),
1659 escape_message_footer_marks(final_text),
1660 if !final_text.is_empty() && !footer.is_empty() {
1661 "\r\n\r\n"
1662 } else {
1663 ""
1664 },
1665 if !footer.is_empty() { "-- \r\n" } else { "" },
1666 footer
1667 );
1668
1669 let mut main_part = MimePart::new("text/plain", message_text);
1670 if is_reaction {
1671 main_part = main_part.header(
1672 "Content-Disposition",
1673 mail_builder::headers::raw::Raw::new("reaction"),
1674 );
1675 }
1676
1677 let mut parts = Vec::new();
1678
1679 if msg.has_html() {
1682 let html = if let Some(orig_msg_id) = msg.param.get_int(Param::Forwarded) {
1683 MsgId::new(orig_msg_id.try_into()?)
1684 .get_html(context)
1685 .await?
1686 } else {
1687 msg.param.get(Param::SendHtml).map(|s| s.to_string())
1688 };
1689 if let Some(html) = html {
1690 main_part = MimePart::new(
1691 "multipart/alternative",
1692 vec![main_part, MimePart::new("text/html", html)],
1693 )
1694 }
1695 }
1696
1697 if msg.viewtype.has_file() {
1699 let file_part = build_body_file(context, &msg).await?;
1700 parts.push(file_part);
1701 }
1702
1703 if let Some(msg_kml_part) = self.get_message_kml_part() {
1704 parts.push(msg_kml_part);
1705 }
1706
1707 if location::is_sending_locations_to_chat(context, Some(msg.chat_id)).await? {
1708 if let Some(part) = self.get_location_kml_part(context).await? {
1709 parts.push(part);
1710 }
1711 }
1712
1713 if command == SystemMessage::MultiDeviceSync {
1716 let json = msg.param.get(Param::Arg).unwrap_or_default();
1717 let ids = msg.param.get(Param::Arg2).unwrap_or_default();
1718 parts.push(context.build_sync_part(json.to_string()));
1719 self.sync_ids_to_delete = Some(ids.to_string());
1720 } else if command == SystemMessage::WebxdcStatusUpdate {
1721 let json = msg.param.get(Param::Arg).unwrap_or_default();
1722 parts.push(context.build_status_update_part(json));
1723 } else if msg.viewtype == Viewtype::Webxdc {
1724 let topic = self
1725 .webxdc_topic
1726 .map(|top| BASE32_NOPAD.encode(top.as_bytes()).to_ascii_lowercase())
1727 .unwrap_or(create_iroh_header(context, msg.id).await?);
1728 headers.push((
1729 HeaderDef::IrohGossipTopic.get_headername(),
1730 mail_builder::headers::raw::Raw::new(topic).into(),
1731 ));
1732 if let (Some(json), _) = context
1733 .render_webxdc_status_update_object(
1734 msg.id,
1735 StatusUpdateSerial::MIN,
1736 StatusUpdateSerial::MAX,
1737 None,
1738 )
1739 .await?
1740 {
1741 parts.push(context.build_status_update_part(&json));
1742 }
1743 }
1744
1745 if self.attach_selfavatar {
1746 match context.get_config(Config::Selfavatar).await? {
1747 Some(path) => match build_avatar_file(context, &path).await {
1748 Ok(avatar) => headers.push((
1749 "Chat-User-Avatar",
1750 mail_builder::headers::raw::Raw::new(format!("base64:{avatar}")).into(),
1751 )),
1752 Err(err) => warn!(context, "mimefactory: cannot attach selfavatar: {}", err),
1753 },
1754 None => headers.push((
1755 "Chat-User-Avatar",
1756 mail_builder::headers::raw::Raw::new("0").into(),
1757 )),
1758 }
1759 }
1760
1761 Ok((main_part, parts))
1762 }
1763
1764 fn render_mdn(&mut self) -> Result<MimePart<'static>> {
1766 let Loaded::Mdn {
1769 rfc724_mid,
1770 additional_msg_ids,
1771 } = &self.loaded
1772 else {
1773 bail!("Attempt to render a message as MDN");
1774 };
1775
1776 let text_part = MimePart::new("text/plain", "This is a receipt notification.");
1780
1781 let mut message = MimePart::new(
1782 "multipart/report; report-type=disposition-notification",
1783 vec![text_part],
1784 );
1785
1786 let message_text2 = format!(
1788 "Original-Recipient: rfc822;{}\r\n\
1789 Final-Recipient: rfc822;{}\r\n\
1790 Original-Message-ID: <{}>\r\n\
1791 Disposition: manual-action/MDN-sent-automatically; displayed\r\n",
1792 self.from_addr, self.from_addr, rfc724_mid
1793 );
1794
1795 let extension_fields = if additional_msg_ids.is_empty() {
1796 "".to_string()
1797 } else {
1798 "Additional-Message-IDs: ".to_string()
1799 + &additional_msg_ids
1800 .iter()
1801 .map(|mid| render_rfc724_mid(mid))
1802 .collect::<Vec<String>>()
1803 .join(" ")
1804 + "\r\n"
1805 };
1806
1807 message.add_part(MimePart::new(
1808 "message/disposition-notification",
1809 message_text2 + &extension_fields,
1810 ));
1811
1812 Ok(message)
1813 }
1814}
1815
1816fn hidden_recipients() -> Address<'static> {
1817 Address::new_group(Some("hidden-recipients".to_string()), Vec::new())
1818}
1819
1820async fn build_body_file(context: &Context, msg: &Message) -> Result<MimePart<'static>> {
1821 let file_name = msg.get_filename().context("msg has no file")?;
1822 let blob = msg
1823 .param
1824 .get_file_blob(context)?
1825 .context("msg has no file")?;
1826 let mimetype = msg
1827 .param
1828 .get(Param::MimeType)
1829 .unwrap_or("application/octet-stream")
1830 .to_string();
1831 let body = fs::read(blob.to_abs_path()).await?;
1832
1833 let mail = MimePart::new(mimetype, body).attachment(sanitize_bidi_characters(&file_name));
1839
1840 Ok(mail)
1841}
1842
1843async fn build_avatar_file(context: &Context, path: &str) -> Result<String> {
1844 let blob = match path.starts_with("$BLOBDIR/") {
1845 true => BlobObject::from_name(context, path)?,
1846 false => BlobObject::from_path(context, path.as_ref())?,
1847 };
1848 let body = fs::read(blob.to_abs_path()).await?;
1849 let encoded_body = base64::engine::general_purpose::STANDARD
1850 .encode(&body)
1851 .chars()
1852 .enumerate()
1853 .fold(String::new(), |mut res, (i, c)| {
1854 if i % 78 == 77 {
1855 res.push(' ')
1856 }
1857 res.push(c);
1858 res
1859 });
1860 Ok(encoded_body)
1861}
1862
1863fn recipients_contain_addr(recipients: &[(String, String)], addr: &str) -> bool {
1864 let addr_lc = addr.to_lowercase();
1865 recipients
1866 .iter()
1867 .any(|(_, cur)| cur.to_lowercase() == addr_lc)
1868}
1869
1870fn render_rfc724_mid(rfc724_mid: &str) -> String {
1871 let rfc724_mid = rfc724_mid.trim().to_string();
1872
1873 if rfc724_mid.chars().next().unwrap_or_default() == '<' {
1874 rfc724_mid
1875 } else {
1876 format!("<{rfc724_mid}>")
1877 }
1878}
1879
1880fn b_encode(value: &str) -> String {
1886 format!(
1887 "=?utf-8?B?{}?=",
1888 base64::engine::general_purpose::STANDARD.encode(value)
1889 )
1890}
1891
1892#[cfg(test)]
1893mod mimefactory_tests;