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054cf987548de59c96c8caff3a8f1efe26b535e0
chatmail-core/src/dc_receive_imf.rs
holger krekel 054cf98754 try to work around mailparser not decoding rfc2047 displaynames 
this pulls in changes in our fork of rust-email  to also correctly
generate rfc2047 encoding
2019-12-10 00:26:46 +01:00

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use itertools::join;
use sha2::{Digest, Sha256};
use num_traits::FromPrimitive;
use crate::blob::BlobObject;
use crate::chat::{self, Chat};
use crate::config::Config;
use crate::constants::*;
use crate::contact::*;
use crate::context::Context;
use crate::dc_tools::*;
use crate::error::Result;
use crate::events::Event;
use crate::headerdef::HeaderDef;
use crate::job::*;
use crate::location;
use crate::message::{self, MessageState, MsgId};
use crate::mimeparser::*;
use crate::param::*;
use crate::peerstate::*;
use crate::securejoin::handle_securejoin_handshake;
use crate::sql;
use crate::stock::StockMessage;
// IndexSet is like HashSet but maintains order of insertion
type ContactIds = indexmap::IndexSet<u32>;
#[derive(Debug, PartialEq, Eq)]
enum CreateEvent {
MsgsChanged,
IncomingMsg,
}
/// Receive a message and add it to the database.
pub fn dc_receive_imf(
context: &Context,
imf_raw: &[u8],
server_folder: impl AsRef<str>,
server_uid: u32,
flags: u32,
) -> Result<()> {
info!(
context,
"Receiving message {}/{}...",
if !server_folder.as_ref().is_empty() {
server_folder.as_ref()
} else {
"?"
},
server_uid,
);
if std::env::var(crate::DCC_MIME_DEBUG).unwrap_or_default() == "2" {
info!(context, "dc_receive_imf: incoming message mime-body:");
println!("{}", String::from_utf8_lossy(imf_raw));
}
let mut mime_parser = MimeParser::from_bytes(context, imf_raw)?;
// we can not add even an empty record if we have no info whatsoever
ensure!(mime_parser.has_headers(), "No Headers Found");
// the function returns the number of created messages in the database
let mut incoming = true;
let mut incoming_origin = Origin::Unknown;
let mut to_id = 0u32;
let mut chat_id = 0;
let mut hidden = false;
let mut needs_delete_job = false;
let mut insert_msg_id = MsgId::new_unset();
let mut sent_timestamp = 0;
let mut created_db_entries = Vec::new();
let mut create_event_to_send = Some(CreateEvent::MsgsChanged);
let mut rr_event_to_send = Vec::new();
let mut to_ids = ContactIds::new();
// helper method to handle early exit and memory cleanup
let cleanup = |context: &Context,
create_event_to_send: &Option<CreateEvent>,
created_db_entries: &Vec<(usize, MsgId)>,
rr_event_to_send: &Vec<(u32, MsgId)>| {
if let Some(create_event_to_send) = create_event_to_send {
for (chat_id, msg_id) in created_db_entries {
let event = match create_event_to_send {
CreateEvent::MsgsChanged => Event::MsgsChanged {
msg_id: *msg_id,
chat_id: *chat_id as u32,
},
CreateEvent::IncomingMsg => Event::IncomingMsg {
msg_id: *msg_id,
chat_id: *chat_id as u32,
},
};
context.call_cb(event);
}
}
for (chat_id, msg_id) in rr_event_to_send {
context.call_cb(Event::MsgRead {
chat_id: *chat_id,
msg_id: *msg_id,
});
}
};
if let Some(value) = mime_parser.get(HeaderDef::Date) {
// is not yet checked against bad times! we do this later if we have the database information.
sent_timestamp = mailparse::dateparse(value).unwrap_or_default();
}
// Make sure, to_ids starts with the first To:-address (Cc: is added in the loop below pass)
if let Some(field) = mime_parser.get(HeaderDef::To) {
dc_add_or_lookup_contacts_by_address_list(
context,
&field,
if !incoming {
Origin::OutgoingTo
} else if incoming_origin.is_verified() {
Origin::IncomingTo
} else {
Origin::IncomingUnknownTo
},
&mut to_ids,
)?;
}
// get From: (it can be an address list!) and check if it is known (for known From:'s we add
// the other To:/Cc: in the 3rd pass)
// or if From: is equal to SELF (in this case, it is any outgoing messages,
// we do not check Return-Path any more as this is unreliable, see issue #150)
let mut from_id = 0;
let mut from_id_blocked = false;
if let Some(field_from) = mime_parser.get(HeaderDef::From_) {
let mut from_ids = ContactIds::new();
dc_add_or_lookup_contacts_by_address_list(
context,
&field_from,
Origin::IncomingUnknownFrom,
&mut from_ids,
)?;
if from_ids.len() > 1 {
warn!(
context,
"mail has more than one address in From: {:?}", field_from
);
}
if from_ids.contains(&DC_CONTACT_ID_SELF) {
incoming = false;
if to_ids.len() == 1 && to_ids.contains(&DC_CONTACT_ID_SELF) {
from_id = DC_CONTACT_ID_SELF;
}
} else if !from_ids.is_empty() {
from_id = from_ids.get_index(0).cloned().unwrap_or_default();
incoming_origin = Contact::get_origin_by_id(context, from_id, &mut from_id_blocked)
} else {
warn!(context, "mail has an empty From header: {:?}", field_from);
// if there is no from given, from_id stays 0 which is just fine. These messages
// are very rare, however, we have to add them to the database (they go to the
// "deaddrop" chat) to avoid a re-download from the server. See also [**]
}
}
// Add parts
let rfc724_mid = match mime_parser.get_rfc724_mid() {
Some(x) => x,
None => {
// missing Message-IDs may come if the mail was set from this account with another
// client that relies in the SMTP server to generate one.
// true eg. for the Webmailer used in all-inkl-KAS
match dc_create_incoming_rfc724_mid(sent_timestamp, from_id, &to_ids) {
Some(x) => x,
None => {
bail!("No Message-Id found and could not create incoming rfc724_mid");
}
}
}
};
if mime_parser.get_last_nonmeta().is_some() {
if let Err(err) = add_parts(
context,
&mut mime_parser,
imf_raw,
incoming,
&mut incoming_origin,
server_folder.as_ref(),
server_uid,
&mut to_ids,
&rfc724_mid,
&mut sent_timestamp,
&mut from_id,
from_id_blocked,
&mut hidden,
&mut chat_id,
&mut to_id,
flags,
&mut needs_delete_job,
&mut insert_msg_id,
&mut created_db_entries,
&mut create_event_to_send,
) {
cleanup(
context,
&create_event_to_send,
&created_db_entries,
&rr_event_to_send,
);
bail!("add_parts error: {:?}", err);
}
} else {
// there are no non-meta data in message, do some basic calculations so that the varaiables
// are correct in the further processing
if sent_timestamp > time() {
sent_timestamp = time()
}
}
mime_parser.handle_reports(
from_id,
sent_timestamp,
&mut rr_event_to_send,
&server_folder,
server_uid,
);
if mime_parser.location_kml.is_some() || mime_parser.message_kml.is_some() {
save_locations(
context,
&mime_parser,
chat_id,
from_id,
insert_msg_id,
hidden,
);
}
// if we delete we don't need to try moving messages
if needs_delete_job && !created_db_entries.is_empty() {
job_add(
context,
Action::DeleteMsgOnImap,
created_db_entries[0].1.to_u32() as i32,
Params::new(),
0,
);
} else {
context.do_heuristics_moves(server_folder.as_ref(), insert_msg_id);
}
info!(
context,
"received message {} has Message-Id: {}", server_uid, rfc724_mid
);
cleanup(
context,
&create_event_to_send,
&created_db_entries,
&rr_event_to_send,
);
Ok(())
}
fn add_parts(
context: &Context,
mut mime_parser: &mut MimeParser,
imf_raw: &[u8],
incoming: bool,
incoming_origin: &mut Origin,
server_folder: impl AsRef<str>,
server_uid: u32,
to_ids: &mut ContactIds,
rfc724_mid: &str,
sent_timestamp: &mut i64,
from_id: &mut u32,
from_id_blocked: bool,
hidden: &mut bool,
chat_id: &mut u32,
to_id: &mut u32,
flags: u32,
needs_delete_job: &mut bool,
insert_msg_id: &mut MsgId,
created_db_entries: &mut Vec<(usize, MsgId)>,
create_event_to_send: &mut Option<CreateEvent>,
) -> Result<()> {
let mut state: MessageState;
let mut msgrmsg: i32;
let mut chat_id_blocked = Blocked::Not;
let mut sort_timestamp = 0;
let mut rcvd_timestamp = 0;
let mut mime_in_reply_to = String::new();
let mut mime_references = String::new();
// collect the rest information, CC: is added to the to-list, BCC: is ignored
// (we should not add BCC to groups as this would split groups. We could add them as "known contacts",
// however, the benefit is very small and this may leak data that is expected to be hidden)
if let Some(fld_cc) = mime_parser.get(HeaderDef::Cc) {
dc_add_or_lookup_contacts_by_address_list(
context,
fld_cc,
if !incoming {
Origin::OutgoingCc
} else if incoming_origin.is_verified() {
Origin::IncomingCc
} else {
Origin::IncomingUnknownCc
},
to_ids,
)?;
}
// check, if the mail is already in our database - if so, just update the folder/uid
// (if the mail was moved around) and finish. (we may get a mail twice eg. if it is
// moved between folders. make sure, this check is done eg. before securejoin-processing) */
if let Ok((old_server_folder, old_server_uid, _)) =
message::rfc724_mid_exists(context, &rfc724_mid)
{
if old_server_folder != server_folder.as_ref() || old_server_uid != server_uid {
message::update_server_uid(context, &rfc724_mid, server_folder.as_ref(), server_uid);
}
bail!("Message already in DB");
}
// 1 or 0 for yes/no
msgrmsg = mime_parser.has_chat_version() as _;
if msgrmsg == 0 && is_reply_to_messenger_message(context, mime_parser) {
// 2=no, but is reply to messenger message
msgrmsg = 2;
}
// incoming non-chat messages may be discarded;
// maybe this can be optimized later, by checking the state before the message body is downloaded
let mut allow_creation = true;
let show_emails =
ShowEmails::from_i32(context.get_config_int(Config::ShowEmails)).unwrap_or_default();
if mime_parser.is_system_message != SystemMessage::AutocryptSetupMessage && msgrmsg == 0 {
// this message is a classic email not a chat-message nor a reply to one
if show_emails == ShowEmails::Off {
*chat_id = DC_CHAT_ID_TRASH;
allow_creation = false
} else if show_emails == ShowEmails::AcceptedContacts {
allow_creation = false
}
}
// check if the message introduces a new chat:
// - outgoing messages introduce a chat with the first to: address if they are sent by a messenger
// - incoming messages introduce a chat only for known contacts if they are sent by a messenger
// (of course, the user can add other chats manually later)
if incoming {
state = if 0 != flags & DC_IMAP_SEEN {
MessageState::InSeen
} else {
MessageState::InFresh
};
*to_id = DC_CONTACT_ID_SELF;
let mut needs_stop_ongoing_process = false;
// handshake messages must be processed _before_ chats are created
// (eg. contacs may be marked as verified)
if mime_parser.get(HeaderDef::SecureJoin).is_some() {
// avoid discarding by show_emails setting
msgrmsg = 1;
*chat_id = 0;
allow_creation = true;
match handle_securejoin_handshake(context, mime_parser, *from_id) {
Ok(ret) => {
if ret.hide_this_msg {
*hidden = true;
*needs_delete_job = ret.delete_this_msg;
state = MessageState::InSeen;
}
if let Some(status) = ret.bob_securejoin_success {
context.bob.write().unwrap().status = status as i32;
}
needs_stop_ongoing_process = ret.stop_ongoing_process;
}
Err(err) => {
warn!(
context,
"Unexpected messaged passed to Secure-Join handshake protocol: {}", err
);
}
}
}
let (test_normal_chat_id, test_normal_chat_id_blocked) =
chat::lookup_by_contact_id(context, *from_id).unwrap_or_default();
// get the chat_id - a chat_id here is no indicator that the chat is displayed in the normal list,
// it might also be blocked and displayed in the deaddrop as a result
if *chat_id == 0 {
// try to create a group
// (groups appear automatically only if the _sender_ is known, see core issue #54)
let create_blocked =
if 0 != test_normal_chat_id && test_normal_chat_id_blocked == Blocked::Not {
Blocked::Not
} else {
Blocked::Deaddrop
};
let (new_chat_id, new_chat_id_blocked) = create_or_lookup_group(
context,
&mut mime_parser,
allow_creation,
create_blocked,
*from_id,
to_ids,
)?;
*chat_id = new_chat_id;
chat_id_blocked = new_chat_id_blocked;
if *chat_id != 0 && chat_id_blocked != Blocked::Not && create_blocked == Blocked::Not {
chat::unblock(context, new_chat_id);
chat_id_blocked = Blocked::Not;
}
}
if *chat_id == 0 {
// check if the message belongs to a mailing list
if mime_parser.is_mailinglist_message() {
*chat_id = DC_CHAT_ID_TRASH;
info!(context, "Message belongs to a mailing list and is ignored.",);
}
}
if *chat_id == 0 {
// try to create a normal chat
let create_blocked = if *from_id == *to_id {
Blocked::Not
} else {
Blocked::Deaddrop
};
if 0 != test_normal_chat_id {
*chat_id = test_normal_chat_id;
chat_id_blocked = test_normal_chat_id_blocked;
} else if allow_creation {
let (id, bl) =
chat::create_or_lookup_by_contact_id(context, *from_id, create_blocked)
.unwrap_or_default();
*chat_id = id;
chat_id_blocked = bl;
}
if 0 != *chat_id && Blocked::Not != chat_id_blocked {
if Blocked::Not == create_blocked {
chat::unblock(context, *chat_id);
chat_id_blocked = Blocked::Not;
} else if is_reply_to_known_message(context, mime_parser) {
// we do not want any chat to be created implicitly. Because of the origin-scale-up,
// the contact requests will pop up and this should be just fine.
Contact::scaleup_origin_by_id(context, *from_id, Origin::IncomingReplyTo);
info!(
context,
"Message is a reply to a known message, mark sender as known.",
);
if !incoming_origin.is_verified() {
*incoming_origin = Origin::IncomingReplyTo;
}
}
}
}
if *chat_id == 0 {
// maybe from_id is null or sth. else is suspicious, move message to trash
*chat_id = DC_CHAT_ID_TRASH;
}
// if the chat_id is blocked,
// for unknown senders and non-delta-messages set the state to NOTICED
// to not result in a chatlist-contact-request (this would require the state FRESH)
if Blocked::Not != chat_id_blocked
&& state == MessageState::InFresh
&& !incoming_origin.is_verified()
&& msgrmsg == 0
&& show_emails != ShowEmails::All
{
state = MessageState::InNoticed;
}
if needs_stop_ongoing_process {
// The Secure-Join protocol finished and the group
// creation handling is done. Stopping the ongoing
// process will let dc_join_securejoin() return.
context.stop_ongoing();
}
} else {
// Outgoing
// the mail is on the IMAP server, probably it is also delivered.
// We cannot recreate other states (read, error).
state = MessageState::OutDelivered;
*from_id = DC_CONTACT_ID_SELF;
if !to_ids.is_empty() {
*to_id = to_ids.get_index(0).cloned().unwrap_or_default();
if *chat_id == 0 {
let (new_chat_id, new_chat_id_blocked) = create_or_lookup_group(
context,
&mut mime_parser,
allow_creation,
Blocked::Not,
*from_id,
to_ids,
)?;
*chat_id = new_chat_id;
chat_id_blocked = new_chat_id_blocked;
// automatically unblock chat when the user sends a message
if *chat_id != 0 && chat_id_blocked != Blocked::Not {
chat::unblock(context, new_chat_id);
chat_id_blocked = Blocked::Not;
}
}
if *chat_id == 0 && allow_creation {
let create_blocked = if 0 != msgrmsg && !Contact::is_blocked_load(context, *to_id) {
Blocked::Not
} else {
Blocked::Deaddrop
};
let (id, bl) =
chat::create_or_lookup_by_contact_id(context, *to_id, create_blocked)
.unwrap_or_default();
*chat_id = id;
chat_id_blocked = bl;
if 0 != *chat_id
&& Blocked::Not != chat_id_blocked
&& Blocked::Not == create_blocked
{
chat::unblock(context, *chat_id);
chat_id_blocked = Blocked::Not;
}
}
}
let self_sent = *from_id == DC_CONTACT_ID_SELF
&& to_ids.len() == 1
&& to_ids.contains(&DC_CONTACT_ID_SELF);
if *chat_id == 0 && self_sent {
// from_id==to_id==DC_CONTACT_ID_SELF - this is a self-sent messages,
// maybe an Autocrypt Setup Messag
let (id, bl) =
chat::create_or_lookup_by_contact_id(context, DC_CONTACT_ID_SELF, Blocked::Not)
.unwrap_or_default();
*chat_id = id;
chat_id_blocked = bl;
if 0 != *chat_id && Blocked::Not != chat_id_blocked {
chat::unblock(context, *chat_id);
chat_id_blocked = Blocked::Not;
}
}
if *chat_id == 0 {
*chat_id = DC_CHAT_ID_TRASH;
}
}
// correct message_timestamp, it should not be used before,
// however, we cannot do this earlier as we need from_id to be set
calc_timestamps(
context,
*chat_id,
*from_id,
*sent_timestamp,
0 == flags & DC_IMAP_SEEN,
&mut sort_timestamp,
sent_timestamp,
&mut rcvd_timestamp,
);
// unarchive chat
chat::unarchive(context, *chat_id)?;
// if the mime-headers should be saved, find out its size
// (the mime-header ends with an empty line)
let save_mime_headers = context.get_config_bool(Config::SaveMimeHeaders);
if let Some(raw) = mime_parser.get(HeaderDef::InReplyTo) {
mime_in_reply_to = raw.clone();
}
if let Some(raw) = mime_parser.get(HeaderDef::References) {
mime_references = raw.clone();
}
// fine, so far. now, split the message into simple parts usable as "short messages"
// and add them to the database (mails sent by other messenger clients should result
// into only one message; mails sent by other clients may result in several messages
// (eg. one per attachment))
let icnt = mime_parser.parts.len();
let mut txt_raw = None;
context.sql.prepare(
"INSERT INTO msgs \
(rfc724_mid, server_folder, server_uid, chat_id, from_id, to_id, timestamp, \
timestamp_sent, timestamp_rcvd, type, state, msgrmsg, txt, txt_raw, param, \
bytes, hidden, mime_headers, mime_in_reply_to, mime_references) \
VALUES (?,?,?,?,?,?, ?,?,?,?,?,?, ?,?,?,?,?,?, ?,?);",
|mut stmt, conn| {
let subject = mime_parser.get_subject().unwrap_or_default();
for part in mime_parser.parts.iter_mut() {
if part.is_meta {
continue;
}
if mime_parser.location_kml.is_some()
&& icnt == 1
&& (part.msg == "-location-" || part.msg.is_empty())
{
*hidden = true;
if state == MessageState::InFresh {
state = MessageState::InNoticed;
}
}
if part.typ == Viewtype::Text {
let msg_raw = part.msg_raw.as_ref().cloned().unwrap_or_default();
txt_raw = Some(format!("{}\n\n{}", subject, msg_raw));
}
if mime_parser.is_system_message != SystemMessage::Unknown {
part.param
.set_int(Param::Cmd, mime_parser.is_system_message as i32);
}
stmt.execute(params![
rfc724_mid,
server_folder.as_ref(),
server_uid as i32,
*chat_id as i32,
*from_id as i32,
*to_id as i32,
sort_timestamp,
*sent_timestamp,
rcvd_timestamp,
part.typ,
state,
msgrmsg,
&part.msg,
// txt_raw might contain invalid utf8
txt_raw.unwrap_or_default(),
part.param.to_string(),
part.bytes as isize,
*hidden,
if save_mime_headers {
Some(String::from_utf8_lossy(imf_raw))
} else {
None
},
mime_in_reply_to,
mime_references,
])?;
txt_raw = None;
let row_id =
sql::get_rowid_with_conn(context, conn, "msgs", "rfc724_mid", &rfc724_mid);
*insert_msg_id = MsgId::new(row_id);
created_db_entries.push((*chat_id as usize, *insert_msg_id));
}
Ok(())
},
)?;
info!(
context,
"Message has {} parts and is assigned to chat #{}.", icnt, *chat_id,
);
// check event to send
if *chat_id == DC_CHAT_ID_TRASH {
*create_event_to_send = None;
} else if incoming && state == MessageState::InFresh {
if from_id_blocked {
*create_event_to_send = None;
} else if Blocked::Not != chat_id_blocked {
*create_event_to_send = Some(CreateEvent::MsgsChanged);
} else {
*create_event_to_send = Some(CreateEvent::IncomingMsg);
}
}
Ok(())
}
fn save_locations(
context: &Context,
mime_parser: &MimeParser,
chat_id: u32,
from_id: u32,
insert_msg_id: MsgId,
hidden: bool,
) {
if chat_id <= DC_CHAT_ID_LAST_SPECIAL {
return;
}
let mut location_id_written = false;
let mut send_event = false;
if mime_parser.message_kml.is_some() {
let locations = &mime_parser.message_kml.as_ref().unwrap().locations;
let newest_location_id =
location::save(context, chat_id, from_id, locations, true).unwrap_or_default();
if 0 != newest_location_id
&& !hidden
&& location::set_msg_location_id(context, insert_msg_id, newest_location_id).is_ok()
{
location_id_written = true;
send_event = true;
}
}
if mime_parser.location_kml.is_some() {
if let Some(ref addr) = mime_parser.location_kml.as_ref().unwrap().addr {
if let Ok(contact) = Contact::get_by_id(context, from_id) {
if contact.get_addr().to_lowercase() == addr.to_lowercase() {
let locations = &mime_parser.location_kml.as_ref().unwrap().locations;
let newest_location_id =
location::save(context, chat_id, from_id, locations, false)
.unwrap_or_default();
if newest_location_id != 0 && !hidden && !location_id_written {
if let Err(err) = location::set_msg_location_id(
context,
insert_msg_id,
newest_location_id,
) {
error!(context, "Failed to set msg_location_id: {:?}", err);
}
}
send_event = true;
}
}
}
}
if send_event {
context.call_cb(Event::LocationChanged(Some(from_id)));
}
}
fn calc_timestamps(
context: &Context,
chat_id: u32,
from_id: u32,
message_timestamp: i64,
is_fresh_msg: bool,
sort_timestamp: &mut i64,
sent_timestamp: &mut i64,
rcvd_timestamp: &mut i64,
) {
*rcvd_timestamp = time();
*sent_timestamp = message_timestamp;
if *sent_timestamp > *rcvd_timestamp {
*sent_timestamp = *rcvd_timestamp
}
*sort_timestamp = message_timestamp;
if is_fresh_msg {
let last_msg_time: Option<i64> = context.sql.query_get_value(
context,
"SELECT MAX(timestamp) FROM msgs WHERE chat_id=? and from_id!=? AND timestamp>=?",
params![chat_id as i32, from_id as i32, *sort_timestamp],
);
if let Some(last_msg_time) = last_msg_time {
if last_msg_time > 0 && *sort_timestamp <= last_msg_time {
*sort_timestamp = last_msg_time + 1;
}
}
}
if *sort_timestamp >= dc_smeared_time(context) {
*sort_timestamp = dc_create_smeared_timestamp(context);
}
}
/// This function tries extracts the group-id from the message and returns the
/// corresponding chat_id. If the chat_id is not existent, it is created.
/// If the message contains groups commands (name, profile image, changed members),
/// they are executed as well.
///
/// if no group-id could be extracted from the message, create_or_lookup_adhoc_group() is called
/// which tries to create or find out the chat_id by:
/// - is there a group with the same recipients? if so, use this (if there are multiple, use the most recent one)
/// - create an ad-hoc group based on the recipient list
///
/// on success the function returns the found/created (chat_id, chat_blocked) tuple .
#[allow(non_snake_case)]
fn create_or_lookup_group(
context: &Context,
mime_parser: &mut MimeParser,
allow_creation: bool,
create_blocked: Blocked,
from_id: u32,
to_ids: &ContactIds,
) -> Result<(u32, Blocked)> {
let mut chat_id_blocked = Blocked::Not;
let mut recreate_member_list = false;
let mut send_EVENT_CHAT_MODIFIED = false;
let mut X_MrRemoveFromGrp = None;
let mut X_MrAddToGrp = None;
let mut X_MrGrpNameChanged = false;
let mut X_MrGrpImageChanged = "".to_string();
let mut better_msg: String = From::from("");
if mime_parser.is_system_message == SystemMessage::LocationStreamingEnabled {
better_msg =
context.stock_system_msg(StockMessage::MsgLocationEnabled, "", "", from_id as u32);
set_better_msg(mime_parser, &better_msg);
}
let mut grpid = "".to_string();
if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupId) {
grpid = optional_field.clone();
}
if grpid.is_empty() {
if let Some(value) = mime_parser.get(HeaderDef::MessageId) {
if let Some(extracted_grpid) = dc_extract_grpid_from_rfc724_mid(&value) {
grpid = extracted_grpid.to_string();
}
}
if grpid.is_empty() {
if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::InReplyTo) {
grpid = extracted_grpid;
} else if let Some(extracted_grpid) = extract_grpid(mime_parser, HeaderDef::References)
{
grpid = extracted_grpid;
} else {
return create_or_lookup_adhoc_group(
context,
mime_parser,
allow_creation,
create_blocked,
from_id,
to_ids,
)
.map_err(|err| {
info!(context, "could not create adhoc-group: {:?}", err);
err
});
}
}
}
// now we have a grpid that is non-empty
// but we might not know about this group
let grpname = mime_parser.get(HeaderDef::ChatGroupName).cloned();
if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupMemberRemoved).cloned() {
X_MrRemoveFromGrp = Some(optional_field);
mime_parser.is_system_message = SystemMessage::MemberRemovedFromGroup;
let left_group = Contact::lookup_id_by_addr(context, X_MrRemoveFromGrp.as_ref().unwrap())
== from_id as u32;
better_msg = context.stock_system_msg(
if left_group {
StockMessage::MsgGroupLeft
} else {
StockMessage::MsgDelMember
},
X_MrRemoveFromGrp.as_ref().unwrap(),
"",
from_id as u32,
)
} else {
let field = mime_parser.get(HeaderDef::ChatGroupMemberAdded).cloned();
if let Some(optional_field) = field {
X_MrAddToGrp = Some(optional_field);
mime_parser.is_system_message = SystemMessage::MemberAddedToGroup;
if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupImage).cloned() {
X_MrGrpImageChanged = optional_field;
}
better_msg = context.stock_system_msg(
StockMessage::MsgAddMember,
X_MrAddToGrp.as_ref().unwrap(),
"",
from_id as u32,
)
} else {
let field = mime_parser.get(HeaderDef::ChatGroupNameChanged);
if let Some(field) = field {
X_MrGrpNameChanged = true;
better_msg = context.stock_system_msg(
StockMessage::MsgGrpName,
field,
if let Some(ref name) = grpname {
name
} else {
""
},
from_id as u32,
);
mime_parser.is_system_message = SystemMessage::GroupNameChanged;
} else if let Some(optional_field) = mime_parser.get(HeaderDef::ChatGroupImage).cloned()
{
// fld_value is a pointer somewhere into mime_parser, must not be freed
X_MrGrpImageChanged = optional_field;
mime_parser.is_system_message = SystemMessage::GroupImageChanged;
better_msg = context.stock_system_msg(
if X_MrGrpImageChanged == "0" {
StockMessage::MsgGrpImgDeleted
} else {
StockMessage::MsgGrpImgChanged
},
"",
"",
from_id as u32,
)
}
}
}
set_better_msg(mime_parser, &better_msg);
// check, if we have a chat with this group ID
let (mut chat_id, chat_id_verified, _blocked) = chat::get_chat_id_by_grpid(context, &grpid);
if chat_id != 0 {
if chat_id_verified {
if let Err(err) =
check_verified_properties(context, mime_parser, from_id as u32, to_ids)
{
warn!(context, "verification problem: {}", err);
let s = format!("{}. See 'Info' for more details", err);
mime_parser.repl_msg_by_error(s);
}
}
// check if the sender is a member of the existing group -
// if not, we'll recreate the group list
if !chat::is_contact_in_chat(context, chat_id, from_id as u32) {
recreate_member_list = true;
}
}
// check if the group does not exist but should be created
let group_explicitly_left = chat::is_group_explicitly_left(context, &grpid).unwrap_or_default();
let self_addr = context
.get_config(Config::ConfiguredAddr)
.unwrap_or_default();
if chat_id == 0
&& !mime_parser.is_mailinglist_message()
&& !grpid.is_empty()
&& grpname.is_some()
// otherwise, a pending "quit" message may pop up
&& X_MrRemoveFromGrp.is_none()
// re-create explicitly left groups only if ourself is re-added
&& (!group_explicitly_left
|| X_MrAddToGrp.is_some() && addr_cmp(&self_addr, X_MrAddToGrp.as_ref().unwrap()))
{
// group does not exist but should be created
let create_verified = if mime_parser.get(HeaderDef::ChatVerified).is_some() {
if let Err(err) =
check_verified_properties(context, mime_parser, from_id as u32, to_ids)
{
warn!(context, "verification problem: {}", err);
let s = format!("{}. See 'Info' for more details", err);
mime_parser.repl_msg_by_error(&s);
}
VerifiedStatus::Verified
} else {
VerifiedStatus::Unverified
};
if !allow_creation {
info!(context, "creating group forbidden by caller");
return Ok((0, Blocked::Not));
}
chat_id = create_group_record(
context,
&grpid,
grpname.as_ref().unwrap(),
create_blocked,
create_verified,
);
chat_id_blocked = create_blocked;
recreate_member_list = true;
}
// again, check chat_id
if chat_id <= DC_CHAT_ID_LAST_SPECIAL {
return if group_explicitly_left {
Ok((DC_CHAT_ID_TRASH, chat_id_blocked))
} else {
create_or_lookup_adhoc_group(
context,
mime_parser,
allow_creation,
create_blocked,
from_id,
to_ids,
)
.map_err(|err| {
warn!(context, "failed to create ad-hoc group: {:?}", err);
err
})
};
}
// We have a valid chat_id > DC_CHAT_ID_LAST_SPECIAL.
//
// However, it's possible that we got a non-DC message
// and the user hit "reply" instead of "reply-all".
// We heuristically detect this case and show
// a placeholder-system-message to warn about this
// and refer to "message-info" to see the message.
// This is similar to how we show messages arriving
// in verified chat using an un-verified key or cleartext.
// XXX insert code in a different PR :)
// execute group commands
if X_MrAddToGrp.is_some() || X_MrRemoveFromGrp.is_some() {
recreate_member_list = true;
} else if X_MrGrpNameChanged {
if let Some(ref grpname) = grpname {
if grpname.len() < 200 {
info!(context, "updating grpname for chat {}", chat_id);
if sql::execute(
context,
&context.sql,
"UPDATE chats SET name=? WHERE id=?;",
params![grpname, chat_id as i32],
)
.is_ok()
{
context.call_cb(Event::ChatModified(chat_id));
}
}
}
}
if !X_MrGrpImageChanged.is_empty() {
info!(
context,
"grp-image-change {} chat {}", X_MrGrpImageChanged, chat_id
);
let mut changed = false;
let mut grpimage: Option<BlobObject> = None;
if X_MrGrpImageChanged == "0" {
changed = true;
} else {
for part in &mut mime_parser.parts {
if part.typ == Viewtype::Image {
grpimage = part
.param
.get_blob(Param::File, context, true)
.unwrap_or(None);
info!(context, "found image {:?}", grpimage);
changed = true;
}
}
}
if changed {
info!(
context,
"New group image set to '{}'.",
grpimage
.as_ref()
.map(|blob| blob.as_name().to_string())
.unwrap_or_default()
);
if let Ok(mut chat) = Chat::load_from_db(context, chat_id) {
match grpimage {
Some(blob) => chat.param.set(Param::ProfileImage, blob.as_name()),
None => chat.param.remove(Param::ProfileImage),
};
chat.update_param(context)?;
send_EVENT_CHAT_MODIFIED = true;
}
}
}
// add members to group/check members
// for recreation: we should add a timestamp
if recreate_member_list {
// TODO: the member list should only be recreated if the corresponding message is newer
// than the one that is responsible for the current member list, see
// https://github.com/deltachat/deltachat-core/issues/127
let skip = X_MrRemoveFromGrp.as_ref();
sql::execute(
context,
&context.sql,
"DELETE FROM chats_contacts WHERE chat_id=?;",
params![chat_id as i32],
)
.ok();
if skip.is_none() || !addr_cmp(&self_addr, skip.unwrap()) {
chat::add_to_chat_contacts_table(context, chat_id, DC_CONTACT_ID_SELF);
}
if from_id > DC_CHAT_ID_LAST_SPECIAL
&& !Contact::addr_equals_contact(context, &self_addr, from_id as u32)
&& (skip.is_none()
|| !Contact::addr_equals_contact(context, skip.unwrap(), from_id as u32))
{
chat::add_to_chat_contacts_table(context, chat_id, from_id as u32);
}
for &to_id in to_ids.iter() {
info!(context, "adding to={:?} to chat id={}", to_id, chat_id);
if !Contact::addr_equals_contact(context, &self_addr, to_id)
&& (skip.is_none() || !Contact::addr_equals_contact(context, skip.unwrap(), to_id))
{
chat::add_to_chat_contacts_table(context, chat_id, to_id);
}
}
send_EVENT_CHAT_MODIFIED = true;
chat::reset_gossiped_timestamp(context, chat_id);
}
if send_EVENT_CHAT_MODIFIED {
context.call_cb(Event::ChatModified(chat_id));
}
Ok((chat_id, chat_id_blocked))
}
/// try extract a grpid from a message-id list header value
fn extract_grpid(mime_parser: &MimeParser, headerdef: HeaderDef) -> Option<String> {
if let Some(value) = mime_parser.get(headerdef) {
for part in value.split(',').map(str::trim) {
if !part.is_empty() {
if let Some(extracted_grpid) = dc_extract_grpid_from_rfc724_mid(part) {
return Some(extracted_grpid.to_string());
}
}
}
}
None
}
/// Handle groups for received messages, return chat_id/Blocked status on success
fn create_or_lookup_adhoc_group(
context: &Context,
mime_parser: &MimeParser,
allow_creation: bool,
create_blocked: Blocked,
from_id: u32,
to_ids: &ContactIds,
) -> Result<(u32, Blocked)> {
// if we're here, no grpid was found, check if there is an existing
// ad-hoc group matching the to-list or if we should and can create one
// (we do not want to heuristically look at the likely mangled Subject)
if mime_parser.is_mailinglist_message() {
// XXX we could parse List-* headers and actually create and
// manage a mailing list group, eventually
info!(
context,
"not creating ad-hoc group for mailing list message"
);
return Ok((0, Blocked::Not));
}
let mut member_ids: Vec<u32> = to_ids.iter().copied().collect();
if !member_ids.contains(&from_id) {
member_ids.push(from_id);
}
if !member_ids.contains(&DC_CONTACT_ID_SELF) {
member_ids.push(DC_CONTACT_ID_SELF);
}
if member_ids.len() < 3 {
info!(context, "not creating ad-hoc group: too few contacts");
return Ok((0, Blocked::Not));
}
let chat_ids = search_chat_ids_by_contact_ids(context, &member_ids)?;
if !chat_ids.is_empty() {
let chat_ids_str = join(chat_ids.iter().map(|x| x.to_string()), ",");
let res = context.sql.query_row(
format!(
"SELECT c.id, c.blocked FROM chats c \
LEFT JOIN msgs m ON m.chat_id=c.id WHERE c.id IN({}) ORDER BY m.timestamp DESC, m.id DESC LIMIT 1;",
chat_ids_str
),
params![],
|row| {
Ok((row.get::<_, i32>(0)?, row.get::<_, Option<Blocked>>(1)?.unwrap_or_default()))
}
);
if let Ok((id, id_blocked)) = res {
/* success, chat found */
return Ok((id as u32, id_blocked));
}
}
if !allow_creation {
info!(context, "creating ad-hoc group prevented from caller");
return Ok((0, Blocked::Not));
}
// we do not check if the message is a reply to another group, this may result in
// chats with unclear member list. instead we create a new group in the following lines ...
// create a new ad-hoc group
// - there is no need to check if this group exists; otherwise we would have caught it above
let grpid = create_adhoc_grp_id(context, &member_ids);
if grpid.is_empty() {
warn!(
context,
"failed to create ad-hoc grpid for {:?}", member_ids
);
return Ok((0, Blocked::Not));
}
// use subject as initial chat name
let grpname = mime_parser.get_subject().unwrap_or_else(|| {
context.stock_string_repl_int(StockMessage::Member, member_ids.len() as i32)
});
// create group record
let new_chat_id = create_group_record(
context,
&grpid,
grpname,
create_blocked,
VerifiedStatus::Unverified,
);
for &member_id in &member_ids {
chat::add_to_chat_contacts_table(context, new_chat_id, member_id);
}
context.call_cb(Event::ChatModified(new_chat_id));
Ok((new_chat_id, create_blocked))
}
fn create_group_record(
context: &Context,
grpid: impl AsRef<str>,
grpname: impl AsRef<str>,
create_blocked: Blocked,
create_verified: VerifiedStatus,
) -> u32 {
if sql::execute(
context,
&context.sql,
"INSERT INTO chats (type, name, grpid, blocked, created_timestamp) VALUES(?, ?, ?, ?, ?);",
params![
if VerifiedStatus::Unverified != create_verified {
Chattype::VerifiedGroup
} else {
Chattype::Group
},
grpname.as_ref(),
grpid.as_ref(),
create_blocked,
time(),
],
)
.is_err()
{
return 0;
}
sql::get_rowid(context, &context.sql, "chats", "grpid", grpid.as_ref())
}
fn create_adhoc_grp_id(context: &Context, member_ids: &[u32]) -> String {
/* algorithm:
- sort normalized, lowercased, e-mail addresses alphabetically
- put all e-mail addresses into a single string, separate the address by a single comma
- sha-256 this string (without possibly terminating null-characters)
- encode the first 64 bits of the sha-256 output as lowercase hex (results in 16 characters from the set [0-9a-f])
*/
let member_ids_str = join(member_ids.iter().map(|x| x.to_string()), ",");
let member_cs = context
.get_config(Config::ConfiguredAddr)
.unwrap_or_else(|| "no-self".to_string())
.to_lowercase();
let members = context
.sql
.query_map(
format!(
"SELECT addr FROM contacts WHERE id IN({}) AND id!=1", // 1=DC_CONTACT_ID_SELF
member_ids_str
),
params![],
|row| row.get::<_, String>(0),
|rows| {
let mut addrs = rows.collect::<std::result::Result<Vec<_>, _>>()?;
addrs.sort();
let mut acc = member_cs.clone();
for addr in &addrs {
acc += ",";
acc += &addr.to_lowercase();
}
Ok(acc)
},
)
.unwrap_or_else(|_| member_cs);
hex_hash(&members)
}
fn hex_hash(s: impl AsRef<str>) -> String {
let bytes = s.as_ref().as_bytes();
let result = Sha256::digest(bytes);
hex::encode(&result[..8])
}
#[allow(non_snake_case)]
fn search_chat_ids_by_contact_ids(
context: &Context,
unsorted_contact_ids: &[u32],
) -> Result<Vec<u32>> {
/* searches chat_id's by the given contact IDs, may return zero, one or more chat_id's */
let mut contact_ids = Vec::with_capacity(23);
let mut chat_ids = Vec::with_capacity(23);
/* copy array, remove duplicates and SELF, sort by ID */
if !unsorted_contact_ids.is_empty() {
for &curr_id in unsorted_contact_ids {
if curr_id != 1 && !contact_ids.contains(&curr_id) {
contact_ids.push(curr_id);
}
}
if !contact_ids.is_empty() {
contact_ids.sort();
let contact_ids_str = join(contact_ids.iter().map(|x| x.to_string()), ",");
context.sql.query_map(
format!(
"SELECT DISTINCT cc.chat_id, cc.contact_id \
FROM chats_contacts cc \
LEFT JOIN chats c ON c.id=cc.chat_id \
WHERE cc.chat_id IN(SELECT chat_id FROM chats_contacts WHERE contact_id IN({})) \
AND c.type=120 \
AND cc.contact_id!=1 \
ORDER BY cc.chat_id, cc.contact_id;", // 1=DC_CONTACT_ID_SELF
contact_ids_str
),
params![],
|row| Ok((row.get::<_, u32>(0)?, row.get::<_, u32>(1)?)),
|rows| {
let mut last_chat_id = 0;
let mut matches = 0;
let mut mismatches = 0;
for row in rows {
let (chat_id, contact_id) = row?;
if chat_id != last_chat_id {
if matches == contact_ids.len() && mismatches == 0 {
chat_ids.push(last_chat_id);
}
last_chat_id = chat_id;
matches = 0;
mismatches = 0;
}
if matches < contact_ids.len() && contact_id == contact_ids[matches] {
matches += 1;
} else {
mismatches += 1;
}
}
if matches == contact_ids.len() && mismatches == 0 {
chat_ids.push(last_chat_id);
}
Ok(())
}
)?;
}
}
Ok(chat_ids)
}
fn check_verified_properties(
context: &Context,
mimeparser: &MimeParser,
from_id: u32,
to_ids: &ContactIds,
) -> Result<()> {
let contact = Contact::load_from_db(context, from_id)?;
ensure!(mimeparser.was_encrypted(), "This message is not encrypted.");
// ensure, the contact is verified
// and the message is signed with a verified key of the sender.
// this check is skipped for SELF as there is no proper SELF-peerstate
// and results in group-splits otherwise.
if from_id != DC_CONTACT_ID_SELF {
let peerstate = Peerstate::from_addr(context, &context.sql, contact.get_addr());
if peerstate.is_none()
|| contact.is_verified_ex(context, peerstate.as_ref())
!= VerifiedStatus::BidirectVerified
{
bail!(
"Sender of this message is not verified: {}",
contact.get_addr()
);
}
if let Some(peerstate) = peerstate {
ensure!(
peerstate.has_verified_key(&mimeparser.signatures),
"The message was sent with non-verified encryption."
);
}
}
// we do not need to check if we are verified with ourself
let mut to_ids = to_ids.clone();
to_ids.remove(&DC_CONTACT_ID_SELF);
if to_ids.is_empty() {
return Ok(());
}
let to_ids_str = join(to_ids.iter().map(|x| x.to_string()), ",");
let rows = context.sql.query_map(
format!(
"SELECT c.addr, LENGTH(ps.verified_key_fingerprint) FROM contacts c \
LEFT JOIN acpeerstates ps ON c.addr=ps.addr WHERE c.id IN({}) ",
to_ids_str
),
params![],
|row| Ok((row.get::<_, String>(0)?, row.get::<_, i32>(1).unwrap_or(0))),
|rows| {
rows.collect::<std::result::Result<Vec<_>, _>>()
.map_err(Into::into)
},
)?;
for (to_addr, _is_verified) in rows.into_iter() {
info!(
context,
"check_verified_properties: {:?} self={:?}",
to_addr,
context.is_self_addr(&to_addr)
);
let mut is_verified = _is_verified != 0;
let mut peerstate = Peerstate::from_addr(context, &context.sql, &to_addr);
// mark gossiped keys (if any) as verified
if mimeparser.gossipped_addr.contains(&to_addr) && peerstate.is_some() {
let peerstate = peerstate.as_mut().unwrap();
// if we're here, we know the gossip key is verified:
// - use the gossip-key as verified-key if there is no verified-key
// - OR if the verified-key does not match public-key or gossip-key
// (otherwise a verified key can _only_ be updated through QR scan which might be annoying,
// see https://github.com/nextleap-project/countermitm/issues/46 for a discussion about this point)
if !is_verified
|| peerstate.verified_key_fingerprint != peerstate.public_key_fingerprint
&& peerstate.verified_key_fingerprint != peerstate.gossip_key_fingerprint
{
info!(context, "{} has verified {}.", contact.get_addr(), to_addr,);
let fp = peerstate.gossip_key_fingerprint.clone();
if let Some(fp) = fp {
peerstate.set_verified(
PeerstateKeyType::GossipKey,
&fp,
PeerstateVerifiedStatus::BidirectVerified,
);
peerstate.save_to_db(&context.sql, false)?;
is_verified = true;
}
}
}
if !is_verified {
bail!(
"{} is not a member of this verified group",
to_addr.to_string()
);
}
}
Ok(())
}
fn set_better_msg(mime_parser: &mut MimeParser, better_msg: impl AsRef<str>) {
let msg = better_msg.as_ref();
if !msg.is_empty() && !mime_parser.parts.is_empty() {
let part = &mut mime_parser.parts[0];
if part.typ == Viewtype::Text {
part.msg = msg.to_string();
}
}
}
fn is_reply_to_known_message(context: &Context, mime_parser: &MimeParser) -> bool {
/* check if the message is a reply to a known message; the replies are identified by the Message-ID from
`In-Reply-To`/`References:` (to support non-Delta-Clients) */
if let Some(field) = mime_parser.get(HeaderDef::InReplyTo) {
if is_known_rfc724_mid_in_list(context, &field) {
return true;
}
}
if let Some(field) = mime_parser.get(HeaderDef::References) {
if is_known_rfc724_mid_in_list(context, &field) {
return true;
}
}
false
}
fn is_known_rfc724_mid_in_list(context: &Context, mid_list: &str) -> bool {
if mid_list.is_empty() {
return false;
}
if let Ok(ids) = mailparse::addrparse(mid_list) {
for id in ids.iter() {
if is_known_rfc724_mid(context, id) {
return true;
}
}
}
false
}
/// Check if a message is a reply to a known message (messenger or non-messenger).
fn is_known_rfc724_mid(context: &Context, rfc724_mid: &mailparse::MailAddr) -> bool {
let addr = extract_single_from_addr(rfc724_mid);
context
.sql
.exists(
"SELECT m.id FROM msgs m \
LEFT JOIN chats c ON m.chat_id=c.id \
WHERE m.rfc724_mid=? \
AND m.chat_id>9 AND c.blocked=0;",
params![addr],
)
.unwrap_or_default()
}
/// Checks if the message defined by mime_parser references a message send by us from Delta Chat.
/// This is similar to is_reply_to_known_message() but
/// - checks also if any of the referenced IDs are send by a messenger
/// - it is okay, if the referenced messages are moved to trash here
/// - no check for the Chat-* headers (function is only called if it is no messenger message itself)
fn is_reply_to_messenger_message(context: &Context, mime_parser: &MimeParser) -> bool {
if let Some(value) = mime_parser.get(HeaderDef::InReplyTo) {
if is_msgrmsg_rfc724_mid_in_list(context, &value) {
return true;
}
}
if let Some(value) = mime_parser.get(HeaderDef::References) {
if is_msgrmsg_rfc724_mid_in_list(context, &value) {
return true;
}
}
false
}
fn is_msgrmsg_rfc724_mid_in_list(context: &Context, mid_list: &str) -> bool {
if let Ok(ids) = mailparse::addrparse(mid_list) {
for id in ids.iter() {
if is_msgrmsg_rfc724_mid(context, id) {
return true;
}
}
}
false
}
fn extract_single_from_addr(addr: &mailparse::MailAddr) -> &String {
match addr {
mailparse::MailAddr::Group(infos) => &infos.addrs[0].addr,
mailparse::MailAddr::Single(info) => &info.addr,
}
}
/// Check if a message is a reply to any messenger message.
fn is_msgrmsg_rfc724_mid(context: &Context, rfc724_mid: &mailparse::MailAddr) -> bool {
let addr = extract_single_from_addr(rfc724_mid);
context
.sql
.exists(
"SELECT id FROM msgs WHERE rfc724_mid=? AND msgrmsg!=0 AND chat_id>9;",
params![addr],
)
.unwrap_or_default()
}
fn dc_add_or_lookup_contacts_by_address_list(
context: &Context,
addr_list_raw: &str,
origin: Origin,
to_ids: &mut ContactIds,
) -> Result<()> {
// XXX we use manual decoding
// https://github.com/staktrace/mailparse/issues/50
use email::rfc2047::decode_rfc2047;
let addrs = match mailparse::addrparse(addr_list_raw) {
Ok(addrs) => addrs,
Err(err) => {
bail!("could not parse {:?}: {:?}", addr_list_raw, err);
}
};
info!(
context,
"dc_add_or_lookup_contacts_by_address raw={:?} addrs={:?}", addr_list_raw, addrs
);
for addr in addrs.iter() {
match addr {
mailparse::MailAddr::Single(info) => {
// mailparse does not give us decoded vals
let display_name = decode_rfc2047(&info.display_name.clone().unwrap_or_default());
to_ids.insert(add_or_lookup_contact_by_addr(
context,
&display_name,
&info.addr,
origin,
)?);
}
mailparse::MailAddr::Group(infos) => {
for info in &infos.addrs {
let display_name =
decode_rfc2047(&info.display_name.clone().unwrap_or_default());
to_ids.insert(add_or_lookup_contact_by_addr(
context,
&display_name,
&info.addr,
origin,
)?);
}
}
}
}
Ok(())
}
/// Add contacts to database on receiving messages.
fn add_or_lookup_contact_by_addr(
context: &Context,
display_name: &Option<String>,
addr: &str,
origin: Origin,
) -> Result<u32> {
if context.is_self_addr(addr)? {
return Ok(DC_CONTACT_ID_SELF);
}
let display_name_normalized = display_name
.as_ref()
.map(normalize_name)
.unwrap_or_default();
info!(
context,
"looking up addr={:?} display_name={:?}", addr, display_name_normalized
);
let (row_id, _modified) =
Contact::add_or_lookup(context, display_name_normalized, addr, origin)?;
ensure!(row_id > 0, "could not add contact: {:?}", addr);
Ok(row_id)
}
fn dc_create_incoming_rfc724_mid(
message_timestamp: i64,
contact_id_from: u32,
contact_ids_to: &ContactIds,
) -> Option<String> {
/* create a deterministic rfc724_mid from input such that
repeatedly calling it with the same input results in the same Message-id */
let largest_id_to = contact_ids_to.iter().max().copied().unwrap_or_default();
let result = format!(
"{}-{}-{}@stub",
message_timestamp, contact_id_from, largest_id_to
);
Some(result)
}
#[cfg(test)]
mod tests {
use super::*;
use crate::test_utils::dummy_context;
#[test]
fn test_hex_hash() {
let data = "hello world";
let res = hex_hash(data);
assert_eq!(res, "b94d27b9934d3e08");
}
#[test]
fn test_grpid_simple() {
let context = dummy_context();
let raw = b"From: hello\n\
Subject: outer-subject\n\
In-Reply-To: <lqkjwelq123@123123>\n\
References: <Gr.HcxyMARjyJy.9-uvzWPTLtV@nauta.cu>\n\
\n\
hello\x00";
let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
assert_eq!(extract_grpid(&mimeparser, HeaderDef::InReplyTo), None);
let grpid = Some("HcxyMARjyJy".to_string());
assert_eq!(extract_grpid(&mimeparser, HeaderDef::References), grpid);
}
#[test]
fn test_grpid_from_multiple() {
let context = dummy_context();
let raw = b"From: hello\n\
Subject: outer-subject\n\
In-Reply-To: <Gr.HcxyMARjyJy.9-qweqwe@asd.net>\n\
References: <qweqweqwe>, <Gr.HcxyMARjyJy.9-uvzWPTLtV@nau.ca>\n\
\n\
hello\x00";
let mimeparser = MimeParser::from_bytes(&context.ctx, &raw[..]).unwrap();
let grpid = Some("HcxyMARjyJy".to_string());
assert_eq!(extract_grpid(&mimeparser, HeaderDef::InReplyTo), grpid);
assert_eq!(extract_grpid(&mimeparser, HeaderDef::References), grpid);
}
#[test]
fn test_dc_create_incoming_rfc724_mid() {
let mut members = ContactIds::new();
assert_eq!(
dc_create_incoming_rfc724_mid(123, 45, &members),
Some("123-45-0@stub".into())
);
members.insert(7);
members.insert(3);
assert_eq!(
dc_create_incoming_rfc724_mid(123, 45, &members),
Some("123-45-7@stub".into())
);
members.insert(9);
assert_eq!(
dc_create_incoming_rfc724_mid(123, 45, &members),
Some("123-45-9@stub".into())
);
}
}
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