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chatmail-core/src/dc_receive_imf.rs
holger krekel 5cbcb76039 introduce safety and a particular EncryptHelper
2019-09-23 17:10:21 +02:00

2027 lines
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use std::ffi::CString;
use std::ptr;
use itertools::join;
use libc::{free, strcmp, strlen};
use mmime::clist::*;
use mmime::mailimf::*;
use mmime::mailimf_types::*;
use mmime::mailmime::*;
use mmime::mailmime_content::*;
use mmime::mailmime_types::*;
use mmime::other::*;
use sha2::{Digest, Sha256};
use crate::chat::{self, Chat};
use crate::constants::*;
use crate::contact::*;
use crate::context::Context;
use crate::dc_mimeparser::*;
use crate::dc_strencode::*;
use crate::dc_tools::*;
use crate::error::Result;
use crate::events::Event;
use crate::job::*;
use crate::location;
use crate::message::{self, MessageState};
use crate::param::*;
use crate::peerstate::*;
use crate::securejoin::handle_securejoin_handshake;
use crate::sql;
use crate::stock::StockMessage;
#[derive(Debug, PartialEq, Eq)]
enum CreateEvent {
MsgsChanged,
IncomingMsg,
}
/// Receive a message and add it to the database.
pub unsafe fn dc_receive_imf(
context: &Context,
imf_raw_not_terminated: *const libc::c_char,
imf_raw_bytes: libc::size_t,
server_folder: impl AsRef<str>,
server_uid: u32,
flags: u32,
) {
info!(
context,
"Receiving message {}/{}...",
if !server_folder.as_ref().is_empty() {
server_folder.as_ref()
} else {
"?"
},
server_uid,
);
// Parse the imf to mailimf_message. normally, this is done by mailimf_message_parse(),
// however, as we also need the MIME data,
// we use mailmime_parse() through dc_mimeparser (both call mailimf_struct_multiple_parse()
// somewhen, I did not found out anything that speaks against this approach yet)
let body = std::slice::from_raw_parts(imf_raw_not_terminated as *const u8, imf_raw_bytes);
let mut mime_parser = MimeParser::new(context);
mime_parser.parse(body);
if mime_parser.header.is_empty() {
// Error - even adding an empty record won't help as we do not know the message ID
info!(context, "No header.");
return;
}
// the function returns the number of created messages in the database
let mut incoming = 1;
let mut incoming_origin = Origin::Unknown;
let mut to_self = 0;
let mut from_id = 0u32;
let mut from_id_blocked = 0;
let mut to_id = 0u32;
let mut chat_id = 0;
let mut hidden = 0;
let mut add_delete_job: libc::c_int = 0;
let mut insert_msg_id = 0;
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 = Vec::with_capacity(16);
// helper method to handle early exit and memory cleanup
let cleanup = |context: &Context,
create_event_to_send: &Option<CreateEvent>,
created_db_entries: &Vec<(usize, usize)>,
rr_event_to_send: &Vec<(u32, u32)>| {
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 as u32,
chat_id: *chat_id as u32,
},
CreateEvent::IncomingMsg => Event::IncomingMsg {
msg_id: *msg_id as u32,
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(field) = mime_parser.lookup_field_typ("Date", MAILIMF_FIELD_ORIG_DATE) {
let orig_date = (*field).fld_data.fld_orig_date;
if !orig_date.is_null() {
// is not yet checked against bad times! we do this later if we have the database information.
sent_timestamp = dc_timestamp_from_date((*orig_date).dt_date_time)
}
}
// get From: 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
if let Some(field) = mime_parser.lookup_field_typ("From", MAILIMF_FIELD_FROM) {
let fld_from = (*field).fld_data.fld_from;
if !fld_from.is_null() {
let mut check_self = 0;
let mut from_list = Vec::with_capacity(16);
dc_add_or_lookup_contacts_by_mailbox_list(
context,
(*fld_from).frm_mb_list,
Origin::IncomingUnknownFrom,
&mut from_list,
&mut check_self,
);
if 0 != check_self {
incoming = 0;
if mime_parser.sender_equals_recipient() {
from_id = DC_CONTACT_ID_SELF;
}
} else if from_list.len() >= 1 {
// 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 [**]
from_id = from_list[0];
incoming_origin = Contact::get_origin_by_id(context, from_id, &mut from_id_blocked)
}
}
}
// Make sure, to_ids starts with the first To:-address (Cc: is added in the loop below pass)
if let Some(field) = mime_parser.lookup_field_typ("To", MAILIMF_FIELD_TO) {
let fld_to = (*field).fld_data.fld_to;
if !fld_to.is_null() {
dc_add_or_lookup_contacts_by_address_list(
context,
(*fld_to).to_addr_list,
if 0 == incoming {
Origin::OutgoingTo
} else if incoming_origin.is_verified() {
Origin::IncomingTo
} else {
Origin::IncomingUnknownTo
},
&mut to_ids,
&mut to_self,
);
}
}
// 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.to_string(),
None => {
error!(context, "can not create incoming rfc724_mid");
cleanup(
context,
&create_event_to_send,
&created_db_entries,
&rr_event_to_send,
);
return;
}
}
}
};
if mime_parser.get_last_nonmeta().is_some() {
if let Err(err) = add_parts(
context,
&mut mime_parser,
imf_raw_not_terminated,
imf_raw_bytes,
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 add_delete_job,
to_self,
&mut insert_msg_id,
&mut created_db_entries,
&mut create_event_to_send,
) {
info!(context, "{}", err);
cleanup(
context,
&create_event_to_send,
&created_db_entries,
&rr_event_to_send,
);
return;
}
} 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()
}
}
if !mime_parser.reports.is_empty() {
handle_reports(
context,
&mime_parser,
from_id,
sent_timestamp,
&mut rr_event_to_send,
server_folder,
server_uid,
);
}
if !mime_parser.message_kml.is_none() && chat_id > DC_CHAT_ID_LAST_SPECIAL {
save_locations(
context,
&mime_parser,
chat_id,
from_id,
insert_msg_id,
hidden,
);
}
if 0 != add_delete_job && !created_db_entries.is_empty() {
job_add(
context,
Action::DeleteMsgOnImap,
created_db_entries[0].1 as i32,
Params::new(),
0,
);
}
info!(
context,
"received message {} has Message-Id: {}", server_uid, rfc724_mid
);
cleanup(
context,
&create_event_to_send,
&created_db_entries,
&rr_event_to_send,
);
}
unsafe fn add_parts(
context: &Context,
mut mime_parser: &mut MimeParser,
imf_raw_not_terminated: *const libc::c_char,
imf_raw_bytes: libc::size_t,
incoming: i32,
incoming_origin: &mut Origin,
server_folder: impl AsRef<str>,
server_uid: u32,
to_ids: &mut Vec<u32>,
rfc724_mid: &str,
sent_timestamp: &mut i64,
from_id: &mut u32,
from_id_blocked: i32,
hidden: &mut libc::c_int,
chat_id: &mut u32,
to_id: &mut u32,
flags: u32,
add_delete_job: &mut libc::c_int,
to_self: i32,
insert_msg_id: &mut u32,
created_db_entries: &mut Vec<(usize, usize)>,
create_event_to_send: &mut Option<CreateEvent>,
) -> Result<()> {
let mut state: MessageState;
let mut msgrmsg: libc::c_int;
let mut chat_id_blocked = Blocked::Not;
let mut sort_timestamp = 0;
let mut rcvd_timestamp = 0;
let mut mime_in_reply_to = std::ptr::null_mut();
let mut mime_references = std::ptr::null_mut();
let cleanup = |mime_in_reply_to: *mut libc::c_char, mime_references: *mut libc::c_char| {
free(mime_in_reply_to.cast());
free(mime_references.cast());
};
// 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(field) = mime_parser.lookup_field_typ("Cc", MAILIMF_FIELD_CC) {
let fld_cc = (*field).fld_data.fld_cc;
if !fld_cc.is_null() {
dc_add_or_lookup_contacts_by_address_list(
context,
(*fld_cc).cc_addr_list,
if 0 == incoming {
Origin::OutgoingCc
} else if incoming_origin.is_verified() {
Origin::IncomingCc
} else {
Origin::IncomingUnknownCc
},
to_ids,
std::ptr::null_mut(),
);
}
}
// 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);
}
cleanup(mime_in_reply_to, mime_references);
bail!("Message already in DB");
}
// 1 or 0 for yes/no
msgrmsg = mime_parser.is_send_by_messenger as _;
if msgrmsg == 0 && 0 != dc_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 = 1;
if mime_parser.is_system_message != SystemMessage::AutocryptSetupMessage && msgrmsg == 0 {
let show_emails = context
.sql
.get_config_int(context, "show_emails")
.unwrap_or_default();
if show_emails == 0 {
*chat_id = 3;
allow_creation = 0
} else if show_emails == 1 {
allow_creation = 0
}
}
// 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 0 != incoming {
state = if 0 != flags & DC_IMAP_SEEN {
MessageState::InSeen
} else {
MessageState::InFresh
};
*to_id = 1;
// handshake messages must be processed _before_ chats are created
// (eg. contacs may be marked as verified)
if mime_parser.lookup_field("Secure-Join").is_some() {
// avoid discarding by show_emails setting
msgrmsg = 1;
*chat_id = 0;
allow_creation = 1;
let handshake = handle_securejoin_handshake(context, mime_parser, *from_id);
if 0 != handshake & DC_HANDSHAKE_STOP_NORMAL_PROCESSING {
*hidden = 1;
*add_delete_job = handshake & DC_HANDSHAKE_ADD_DELETE_JOB;
state = MessageState::InSeen;
}
}
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
|| incoming_origin.is_start_new_chat()
{
Blocked::Not
} else {
Blocked::Deaddrop
};
create_or_lookup_group(
context,
&mut mime_parser,
allow_creation,
create_blocked,
*from_id,
to_ids,
chat_id,
&mut chat_id_blocked,
);
if 0 != *chat_id && Blocked::Not != chat_id_blocked && create_blocked == Blocked::Not {
chat::unblock(context, *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 = 3;
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 incoming_origin.is_start_new_chat() || *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 0 != 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 0 != dc_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 contact request (this would require the state FRESH)
if Blocked::Not != chat_id_blocked && state == MessageState::InFresh {
if !incoming_origin.is_verified() && msgrmsg == 0 {
state = MessageState::InNoticed;
}
}
} 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[0];
if *chat_id == 0 {
create_or_lookup_group(
context,
&mut mime_parser,
allow_creation,
Blocked::Not,
*from_id,
to_ids,
chat_id,
&mut chat_id_blocked,
);
if 0 != *chat_id && Blocked::Not != chat_id_blocked {
chat::unblock(context, *chat_id);
chat_id_blocked = Blocked::Not;
}
}
if *chat_id == 0 && 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;
}
}
}
if *chat_id == 0 {
if to_ids.is_empty() && 0 != to_self {
// 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, 1, 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,
if 0 != flags & DC_IMAP_SEEN { 0 } else { 1 },
&mut sort_timestamp,
sent_timestamp,
&mut rcvd_timestamp,
);
// unarchive chat
chat::unarchive(context, *chat_id).unwrap();
// if the mime-headers should be saved, find out its size
// (the mime-header ends with an empty line)
let save_mime_headers = context.sql.get_config_bool(context, "save_mime_headers");
if let Some(field) = mime_parser.lookup_field_typ("In-Reply-To", MAILIMF_FIELD_IN_REPLY_TO) {
let fld_in_reply_to = (*field).fld_data.fld_in_reply_to;
if !fld_in_reply_to.is_null() {
mime_in_reply_to = dc_str_from_clist(
(*(*field).fld_data.fld_in_reply_to).mid_list,
b" \x00" as *const u8 as *const libc::c_char,
)
}
}
if let Some(field) = mime_parser.lookup_field_typ("References", MAILIMF_FIELD_REFERENCES) {
let fld_references = (*field).fld_data.fld_references;
if !fld_references.is_null() {
mime_references = dc_str_from_clist(
(*(*field).fld_data.fld_references).mid_list,
b" \x00" as *const u8 as *const libc::c_char,
)
}
}
// 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;
let is_ok = 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| {
for i in 0..icnt {
let part = &mut mime_parser.parts[i];
if part.is_meta {
continue;
}
if let Some(ref msg) = part.msg {
if !mime_parser.location_kml.is_none()
&& icnt == 1
&& (msg == "-location-" || msg.is_empty())
{
*hidden = 1;
if state == MessageState::InFresh {
state = MessageState::InNoticed;
}
}
}
if part.typ == Viewtype::Text {
let msg_raw = part.msg_raw.as_ref().cloned().unwrap_or_default();
let subject = mime_parser
.subject
.as_ref()
.map(|s| s.to_string())
.unwrap_or("".into());
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);
}
/*
info!(
context,
"received mime message {:?}",
String::from_utf8_lossy(std::slice::from_raw_parts(
imf_raw_not_terminated as *const u8,
imf_raw_bytes,
))
);
*/
stmt.execute(params![
rfc724_mid,
server_folder.as_ref(),
server_uid as libc::c_int,
*chat_id as libc::c_int,
*from_id as libc::c_int,
*to_id as libc::c_int,
sort_timestamp,
*sent_timestamp,
rcvd_timestamp,
part.typ,
state,
msgrmsg,
part.msg.as_ref().map_or("", String::as_str),
// txt_raw might contain invalid utf8
txt_raw.unwrap_or_default(),
part.param.to_string(),
part.bytes,
*hidden,
if save_mime_headers {
Some(String::from_utf8_lossy(std::slice::from_raw_parts(
imf_raw_not_terminated as *const u8,
imf_raw_bytes,
)))
} else {
None
},
to_string(mime_in_reply_to),
to_string(mime_references),
])?;
txt_raw = None;
*insert_msg_id =
sql::get_rowid_with_conn(context, conn, "msgs", "rfc724_mid", &rfc724_mid);
created_db_entries.push((*chat_id as usize, *insert_msg_id as usize));
}
Ok(())
},
)
.is_ok();
if !is_ok {
// i/o error - there is nothing more we can do - in other cases, we try to write at least an empty record
cleanup(mime_in_reply_to, mime_references);
bail!("Cannot write DB.");
}
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 0 != incoming && state == MessageState::InFresh {
if 0 != 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);
}
}
context.do_heuristics_moves(server_folder.as_ref(), *insert_msg_id);
cleanup(mime_in_reply_to, mime_references);
Ok(())
}
// Handle reports (mainly MDNs)
unsafe fn handle_reports(
context: &Context,
mime_parser: &MimeParser,
from_id: u32,
sent_timestamp: i64,
rr_event_to_send: &mut Vec<(u32, u32)>,
server_folder: impl AsRef<str>,
server_uid: u32,
) {
let mdns_enabled = context
.sql
.get_config_int(context, "mdns_enabled")
.unwrap_or_else(|| DC_MDNS_DEFAULT_ENABLED);
for report_root in &mime_parser.reports {
let report_root = *report_root;
let mut mdn_consumed = 0;
let report_type = mailmime_find_ct_parameter(report_root, "report-type");
if report_root.is_null() || report_type.is_null() || (*report_type).pa_value.is_null() {
continue;
}
// the first part is for humans, the second for machines
if strcmp(
(*report_type).pa_value,
b"disposition-notification\x00" as *const u8 as *const libc::c_char,
) == 0
&& (*(*report_root).mm_data.mm_multipart.mm_mp_list).count >= 2
{
// to get a clear functionality, do not show incoming MDNs if the options is disabled
if 0 != mdns_enabled {
let report_data = (if !if !(*(*report_root).mm_data.mm_multipart.mm_mp_list)
.first
.is_null()
{
(*(*(*report_root).mm_data.mm_multipart.mm_mp_list).first).next
} else {
ptr::null_mut()
}
.is_null()
{
(*if !(*(*report_root).mm_data.mm_multipart.mm_mp_list)
.first
.is_null()
{
(*(*(*report_root).mm_data.mm_multipart.mm_mp_list).first).next
} else {
ptr::null_mut()
})
.data
} else {
ptr::null_mut()
}) as *mut mailmime;
if !report_data.is_null()
&& (*(*(*report_data).mm_content_type).ct_type).tp_type
== MAILMIME_TYPE_COMPOSITE_TYPE as libc::c_int
&& (*(*(*(*report_data).mm_content_type).ct_type)
.tp_data
.tp_composite_type)
.ct_type
== MAILMIME_COMPOSITE_TYPE_MESSAGE as libc::c_int
&& strcmp(
(*(*report_data).mm_content_type).ct_subtype,
b"disposition-notification\x00" as *const u8 as *const libc::c_char,
) == 0
{
if let Ok(report_body) = mailmime_transfer_decode(report_data) {
let mut report_parsed = std::ptr::null_mut();
let mut dummy = 0;
if mailmime_parse(
report_body.as_ptr() as *const _,
report_body.len(),
&mut dummy,
&mut report_parsed,
) == MAIL_NO_ERROR as libc::c_int
&& !report_parsed.is_null()
{
let report_fields = mailmime_find_mailimf_fields(report_parsed);
if !report_fields.is_null() {
let of_disposition = mailimf_find_optional_field(
report_fields,
b"Disposition\x00" as *const u8 as *const libc::c_char,
);
let of_org_msgid = mailimf_find_optional_field(
report_fields,
b"Original-Message-ID\x00" as *const u8 as *const libc::c_char,
);
if !of_disposition.is_null()
&& !(*of_disposition).fld_value.is_null()
&& !of_org_msgid.is_null()
&& !(*of_org_msgid).fld_value.is_null()
{
let mut rfc724_mid_0 = std::ptr::null_mut();
dummy = 0;
if mailimf_msg_id_parse(
(*of_org_msgid).fld_value,
strlen((*of_org_msgid).fld_value),
&mut dummy,
&mut rfc724_mid_0,
) == MAIL_NO_ERROR as libc::c_int
&& !rfc724_mid_0.is_null()
{
let mut chat_id_0 = 0;
let mut msg_id = 0;
if message::mdn_from_ext(
context,
from_id,
as_str(rfc724_mid_0),
sent_timestamp,
&mut chat_id_0,
&mut msg_id,
) {
rr_event_to_send.push((chat_id_0, msg_id));
}
mdn_consumed = (msg_id != 0) as libc::c_int;
free(rfc724_mid_0.cast());
}
}
}
mailmime_free(report_parsed);
}
}
}
}
if mime_parser.is_send_by_messenger || 0 != mdn_consumed {
let mut param = Params::new();
param.set(Param::ServerFolder, server_folder.as_ref());
param.set_int(Param::ServerUid, server_uid as i32);
if mime_parser.is_send_by_messenger
&& 0 != context
.sql
.get_config_int(context, "mvbox_move")
.unwrap_or_else(|| 1)
{
param.set_int(Param::AlsoMove, 1);
}
job_add(context, Action::MarkseenMdnOnImap, 0, param, 0);
}
}
}
}
fn save_locations(
context: &Context,
mime_parser: &MimeParser,
chat_id: u32,
from_id: u32,
insert_msg_id: u32,
hidden: i32,
) {
let mut location_id_written = false;
let mut send_event = false;
if !mime_parser.message_kml.is_none() && chat_id > DC_CHAT_ID_LAST_SPECIAL as libc::c_uint {
let locations = &mime_parser.message_kml.as_ref().unwrap().locations;
let newest_location_id =
location::save(context, chat_id, from_id, locations, 1).unwrap_or_default();
if 0 != newest_location_id && 0 == hidden {
if 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_none() && chat_id > DC_CHAT_ID_LAST_SPECIAL as libc::c_uint {
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().is_empty()
&& 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, 0).unwrap_or_default();
if newest_location_id != 0 && hidden == 0 && !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)));
}
}
unsafe fn calc_timestamps(
context: &Context,
chat_id: u32,
from_id: u32,
message_timestamp: i64,
is_fresh_msg: libc::c_int,
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 0 != 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 {
if *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
///
/// So when the function returns, the caller has the group id matching the current state of the group.
#[allow(non_snake_case)]
unsafe fn create_or_lookup_group(
context: &Context,
mime_parser: &mut MimeParser,
allow_creation: libc::c_int,
create_blocked: Blocked,
from_id: u32,
to_ids: &mut Vec<u32>,
ret_chat_id: *mut u32,
ret_chat_id_blocked: &mut Blocked,
) {
let group_explicitly_left: bool;
let mut chat_id = 0;
let mut chat_id_blocked = Blocked::Not;
let mut grpid = "".to_string();
let mut grpname = None;
let to_ids_cnt = to_ids.len();
let mut recreate_member_list = 0;
let mut send_EVENT_CHAT_MODIFIED = 0;
let mut X_MrRemoveFromGrp = None;
let mut X_MrAddToGrp = None;
let mut X_MrGrpNameChanged = 0;
let mut X_MrGrpImageChanged = "".to_string();
let mut better_msg: String = From::from("");
let cleanup = |ret_chat_id: *mut u32,
ret_chat_id_blocked: &mut Blocked,
chat_id: u32,
chat_id_blocked: Blocked| {
if !ret_chat_id.is_null() {
*ret_chat_id = chat_id;
}
*ret_chat_id_blocked = if 0 != chat_id {
chat_id_blocked
} else {
Blocked::Not
};
};
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);
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-ID") {
grpid = optional_field;
}
if grpid.is_empty() {
if let Some(field) = mime_parser.lookup_field_typ("Message-ID", MAILIMF_FIELD_MESSAGE_ID) {
let fld_message_id = (*field).fld_data.fld_message_id;
if !fld_message_id.is_null() {
if let Some(extracted_grpid) =
dc_extract_grpid_from_rfc724_mid(as_str((*fld_message_id).mid_value))
{
grpid = extracted_grpid.to_string();
} else {
grpid = "".to_string();
}
}
}
if grpid.is_empty() {
if let Some(field) =
mime_parser.lookup_field_typ("In-Reply-To", MAILIMF_FIELD_IN_REPLY_TO)
{
let fld_in_reply_to = (*field).fld_data.fld_in_reply_to;
if !fld_in_reply_to.is_null() {
grpid = to_string(dc_extract_grpid_from_rfc724_mid_list(
(*fld_in_reply_to).mid_list,
));
}
}
if grpid.is_empty() {
if let Some(field) =
mime_parser.lookup_field_typ("References", MAILIMF_FIELD_REFERENCES)
{
let fld_references = (*field).fld_data.fld_references;
if !fld_references.is_null() {
grpid = to_string(dc_extract_grpid_from_rfc724_mid_list(
(*fld_references).mid_list,
));
}
}
if grpid.is_empty() {
create_or_lookup_adhoc_group(
context,
mime_parser,
allow_creation,
create_blocked,
from_id,
to_ids,
&mut chat_id,
&mut chat_id_blocked,
);
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
}
}
}
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-Name") {
grpname = Some(dc_decode_header_words_safe(&optional_field));
}
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-Member-Removed") {
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) as libc::c_int;
better_msg = context.stock_system_msg(
if 0 != left_group {
StockMessage::MsgGroupLeft
} else {
StockMessage::MsgDelMember
},
X_MrRemoveFromGrp.as_ref().unwrap(),
"",
from_id as u32,
)
} else {
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-Member-Added") {
X_MrAddToGrp = Some(optional_field);
mime_parser.is_system_message = SystemMessage::MemberAddedToGroup;
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-Image") {
X_MrGrpImageChanged = optional_field;
}
better_msg = context.stock_system_msg(
StockMessage::MsgAddMember,
X_MrAddToGrp.as_ref().unwrap(),
"",
from_id as u32,
)
} else {
if let Some(optional_field) =
mime_parser.lookup_optional_field("Chat-Group-Name-Changed")
{
X_MrGrpNameChanged = 1;
mime_parser.is_system_message = SystemMessage::GroupNameChanged;
better_msg = context.stock_system_msg(
StockMessage::MsgGrpName,
&optional_field,
if let Some(ref name) = grpname {
name
} else {
""
},
from_id as u32,
)
} else {
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Group-Image")
{
// 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 {
let mut failure_reason = std::ptr::null_mut();
if chat_id_verified
&& 0 == check_verified_properties(
context,
mime_parser,
from_id as u32,
to_ids,
&mut failure_reason,
)
{
mime_parser.repl_msg_by_error(to_string(failure_reason));
}
free(failure_reason.cast());
}
// check if the sender is a member of the existing group -
// if not, we'll recreate the group list
if chat_id != 0 && !chat::is_contact_in_chat(context, chat_id, from_id as u32) {
recreate_member_list = 1;
}
// check if the group does not exist but should be created
group_explicitly_left = chat::is_group_explicitly_left(context, &grpid).unwrap_or_default();
let self_addr = context
.sql
.get_config(context, "configured_addr")
.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()))
{
let mut create_verified = VerifiedStatus::Unverified;
if mime_parser.lookup_field("Chat-Verified").is_some() {
create_verified = VerifiedStatus::Verified;
let mut failure_reason = std::ptr::null_mut();
if 0 == check_verified_properties(
context,
mime_parser,
from_id as u32,
to_ids,
&mut failure_reason,
) {
mime_parser.repl_msg_by_error(to_string(failure_reason));
}
free(failure_reason.cast());
}
if 0 == allow_creation {
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
chat_id = create_group_record(
context,
&grpid,
grpname.as_ref().unwrap(),
create_blocked,
create_verified,
);
chat_id_blocked = create_blocked;
recreate_member_list = 1;
}
// again, check chat_id
if chat_id <= DC_CHAT_ID_LAST_SPECIAL {
chat_id = 0;
if group_explicitly_left {
chat_id = DC_CHAT_ID_TRASH;
} else {
create_or_lookup_adhoc_group(
context,
mime_parser,
allow_creation,
create_blocked,
from_id,
to_ids,
&mut chat_id,
&mut chat_id_blocked,
);
}
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
// execute group commands
if X_MrAddToGrp.is_some() || X_MrRemoveFromGrp.is_some() {
recreate_member_list = 1;
} else if 0 != 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 = "".to_string();
if X_MrGrpImageChanged == "0" {
changed = true;
} else {
for part in &mut mime_parser.parts {
if part.typ == Viewtype::Image {
grpimage = part
.param
.get(Param::File)
.map(|s| s.to_string())
.unwrap_or_else(|| "".to_string());
info!(context, "found image {:?}", grpimage);
changed = true;
}
}
}
if changed {
info!(context, "New group image set to '{}'.", grpimage);
if let Ok(mut chat) = Chat::load_from_db(context, chat_id) {
if grpimage.is_empty() {
chat.param.remove(Param::ProfileImage);
} else {
chat.param.set(Param::ProfileImage, grpimage);
}
chat.update_param(context).unwrap();
send_EVENT_CHAT_MODIFIED = 1;
}
}
}
// add members to group/check members
// for recreation: we should add a timestamp
if 0 != 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 {
if !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() {
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 = 1;
chat::reset_gossiped_timestamp(context, chat_id);
}
if 0 != send_EVENT_CHAT_MODIFIED {
context.call_cb(Event::ChatModified(chat_id));
}
// check the number of receivers -
// the only critical situation is if the user hits "Reply" instead of "Reply all" in a non-messenger-client */
if to_ids_cnt == 1 && !mime_parser.is_send_by_messenger {
let is_contact_cnt = chat::get_chat_contact_cnt(context, chat_id);
if is_contact_cnt > 3 {
// to_ids_cnt==1 may be "From: A, To: B, SELF" as SELF is not counted in to_ids_cnt.
// So everything up to 3 is no error.
chat_id = 0;
create_or_lookup_adhoc_group(
context,
mime_parser,
allow_creation,
create_blocked,
from_id,
to_ids,
&mut chat_id,
&mut chat_id_blocked,
);
}
}
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
}
/// Handle groups for received messages
unsafe fn create_or_lookup_adhoc_group(
context: &Context,
mime_parser: &MimeParser,
allow_creation: libc::c_int,
create_blocked: Blocked,
from_id: u32,
to_ids: &mut Vec<u32>,
ret_chat_id: *mut u32,
ret_chat_id_blocked: &mut Blocked,
) {
// if we're here, no grpid was found, check there is an existing ad-hoc
// group matching the to-list or if we can create one
let mut chat_id = 0;
let mut chat_id_blocked = Blocked::Not;
let cleanup = |ret_chat_id: *mut u32,
ret_chat_id_blocked: &mut Blocked,
chat_id: u32,
chat_id_blocked: Blocked| {
if !ret_chat_id.is_null() {
*ret_chat_id = chat_id;
}
*ret_chat_id_blocked = chat_id_blocked;
};
// build member list from the given ids
if to_ids.is_empty() || mime_parser.is_mailinglist_message() {
// too few contacts or a mailinglist
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
let mut member_ids = to_ids.clone();
if !member_ids.contains(&from_id) {
member_ids.push(from_id);
}
if !member_ids.contains(&1) {
member_ids.push(1);
}
if member_ids.len() < 3 {
// too few contacts given
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
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 {
chat_id = id as u32;
chat_id_blocked = id_blocked;
/* success, chat found */
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
}
if 0 == allow_creation {
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
// 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() {
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_blocked);
return;
}
// use subject as initial chat name
let grpname = if let Some(subject) = mime_parser.subject.as_ref().filter(|s| !s.is_empty()) {
subject.to_string()
} else {
context.stock_string_repl_int(StockMessage::Member, member_ids.len() as libc::c_int)
};
// create group record
chat_id = create_group_record(
context,
&grpid,
grpname,
create_blocked,
VerifiedStatus::Unverified,
);
chat_id_blocked = create_blocked;
for &member_id in &member_ids {
chat::add_to_chat_contacts_table(context, chat_id, member_id);
}
context.call_cb(Event::ChatModified(chat_id));
cleanup(ret_chat_id, ret_chat_id_blocked, chat_id, chat_id_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) VALUES(?, ?, ?, ?);",
params![
if VerifiedStatus::Unverified != create_verified {
Chattype::VerifiedGroup
} else {
Chattype::Group
},
grpname.as_ref(),
grpid.as_ref(),
create_blocked,
],
)
.is_err()
{
return 0;
}
sql::get_rowid(context, &context.sql, "chats", "grpid", grpid.as_ref())
}
fn create_adhoc_grp_id(context: &Context, member_ids: &Vec<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
.sql
.get_config(context, "configured_addr")
.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",
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: &Vec<u32>) -> 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;",
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(())
}
).unwrap(); // TODO: better error handling
}
}
chat_ids
}
unsafe fn check_verified_properties(
context: &Context,
mimeparser: &MimeParser,
from_id: u32,
to_ids: &Vec<u32>,
failure_reason: *mut *mut libc::c_char,
) -> libc::c_int {
let verify_fail = |reason: String| {
*failure_reason = format!("{}. See \"Info\" for details.", reason).strdup();
warn!(context, "{}", reason);
};
let contact = match Contact::load_from_db(context, from_id) {
Ok(contact) => contact,
Err(_err) => {
verify_fail("Internal Error; cannot load contact".into());
return 0;
}
};
if !mimeparser.e2ee_helper.encrypted {
verify_fail("This message is not encrypted".into());
return 0;
}
// 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 != 1 {
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
{
verify_fail("The sender of this message is not verified.".into());
return 0;
}
if let Some(peerstate) = peerstate {
if !peerstate.has_verified_key(&mimeparser.e2ee_helper.signatures) {
verify_fail("The message was sent with non-verified encryption.".into());
return 0;
}
}
}
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)?)),
|rows| {
rows.collect::<std::result::Result<Vec<_>, _>>()
.map_err(Into::into)
},
);
if rows.is_err() {
return 0;
}
for (to_addr, mut is_verified) in rows.unwrap().into_iter() {
let mut peerstate = Peerstate::from_addr(context, &context.sql, &to_addr);
if mimeparser.e2ee_helper.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 0 == is_verified
|| peerstate.verified_key_fingerprint != peerstate.public_key_fingerprint
&& peerstate.verified_key_fingerprint != peerstate.gossip_key_fingerprint
{
info!(context, "{} has verfied {}.", contact.get_addr(), to_addr,);
let fp = peerstate.gossip_key_fingerprint.clone();
if let Some(fp) = fp {
peerstate.set_verified(0, &fp, 2);
peerstate.save_to_db(&context.sql, false);
is_verified = 1;
}
}
}
if 0 == is_verified {
verify_fail(format!(
"{} is not a member of this verified group",
to_addr
));
return 0;
}
}
1
}
fn set_better_msg(mime_parser: &mut MimeParser, better_msg: impl AsRef<str>) {
let msg = better_msg.as_ref();
if msg.len() > 0 && !mime_parser.parts.is_empty() {
let part = &mut mime_parser.parts[0];
if part.typ == Viewtype::Text {
part.msg = Some(msg.to_string());
}
};
}
unsafe fn dc_is_reply_to_known_message(context: &Context, mime_parser: &MimeParser) -> libc::c_int {
/* 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) or from `Chat-Predecessor:` (Delta clients, see comment in dc_chat.c) */
if let Some(optional_field) = mime_parser.lookup_optional_field("Chat-Predecessor") {
let optional_field_c = CString::new(optional_field).unwrap();
if 0 != is_known_rfc724_mid(context, optional_field_c.as_ptr()) {
return 1;
}
}
if let Some(field) = mime_parser.lookup_field("In-Reply-To") {
if (*field).fld_type == MAILIMF_FIELD_IN_REPLY_TO as libc::c_int {
let fld_in_reply_to = (*field).fld_data.fld_in_reply_to;
if !fld_in_reply_to.is_null() {
if is_known_rfc724_mid_in_list(
context,
(*(*field).fld_data.fld_in_reply_to).mid_list,
) {
return 1;
}
}
}
}
if let Some(field) = mime_parser.lookup_field("References") {
if (*field).fld_type == MAILIMF_FIELD_REFERENCES as libc::c_int {
let fld_references = (*field).fld_data.fld_references;
if !fld_references.is_null() {
if is_known_rfc724_mid_in_list(
context,
(*(*field).fld_data.fld_references).mid_list,
) {
return 1;
}
}
}
}
0
}
unsafe fn is_known_rfc724_mid_in_list(context: &Context, mid_list: *const clist) -> bool {
if mid_list.is_null() {
return false;
}
for data in &*mid_list {
if 0 != is_known_rfc724_mid(context, data.cast()) {
return true;
}
}
return 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: *const libc::c_char) -> libc::c_int {
if rfc724_mid.is_null() {
return 0;
}
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![as_str(rfc724_mid)],
)
.unwrap_or_default() as libc::c_int
}
unsafe fn dc_is_reply_to_messenger_message(
context: &Context,
mime_parser: &MimeParser,
) -> libc::c_int {
/* function 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) */
if let Some(field) = mime_parser.lookup_field("In-Reply-To") {
if (*field).fld_type == MAILIMF_FIELD_IN_REPLY_TO as libc::c_int {
let fld_in_reply_to = (*field).fld_data.fld_in_reply_to;
if !fld_in_reply_to.is_null() {
if 0 != is_msgrmsg_rfc724_mid_in_list(
context,
(*(*field).fld_data.fld_in_reply_to).mid_list,
) {
return 1;
}
}
}
}
if let Some(field) = mime_parser.lookup_field("References") {
if (*field).fld_type == MAILIMF_FIELD_REFERENCES as libc::c_int {
let fld_references: *mut mailimf_references = (*field).fld_data.fld_references;
if !fld_references.is_null() {
if 0 != is_msgrmsg_rfc724_mid_in_list(
context,
(*(*field).fld_data.fld_references).mid_list,
) {
return 1;
}
}
}
}
0
}
unsafe fn is_msgrmsg_rfc724_mid_in_list(context: &Context, mid_list: *const clist) -> libc::c_int {
if !mid_list.is_null() {
let mut cur: *mut clistiter = (*mid_list).first;
while !cur.is_null() {
if 0 != is_msgrmsg_rfc724_mid(
context,
if !cur.is_null() {
as_str((*cur).data as *const libc::c_char)
} else {
""
},
) {
return 1;
}
cur = if !cur.is_null() {
(*cur).next
} else {
ptr::null_mut()
}
}
}
0
}
/// Check if a message is a reply to any messenger message.
fn is_msgrmsg_rfc724_mid(context: &Context, rfc724_mid: &str) -> libc::c_int {
if rfc724_mid.is_empty() {
return 0;
}
context
.sql
.exists(
"SELECT id FROM msgs WHERE rfc724_mid=? AND msgrmsg!=0 AND chat_id>9;",
params![rfc724_mid],
)
.unwrap_or_default() as libc::c_int
}
unsafe fn dc_add_or_lookup_contacts_by_address_list(
context: &Context,
adr_list: *const mailimf_address_list,
origin: Origin,
ids: &mut Vec<u32>,
check_self: *mut libc::c_int,
) {
if adr_list.is_null() {
return;
}
let mut cur: *mut clistiter = (*(*adr_list).ad_list).first;
while !cur.is_null() {
let adr: *mut mailimf_address = (if !cur.is_null() {
(*cur).data
} else {
ptr::null_mut()
}) as *mut mailimf_address;
if !adr.is_null() {
if (*adr).ad_type == MAILIMF_ADDRESS_MAILBOX as libc::c_int {
let mb: *mut mailimf_mailbox = (*adr).ad_data.ad_mailbox;
if !mb.is_null() {
add_or_lookup_contact_by_addr(
context,
(*mb).mb_display_name,
(*mb).mb_addr_spec,
origin,
ids,
check_self,
);
}
} else if (*adr).ad_type == MAILIMF_ADDRESS_GROUP as libc::c_int {
let group: *mut mailimf_group = (*adr).ad_data.ad_group;
if !group.is_null() && !(*group).grp_mb_list.is_null() {
dc_add_or_lookup_contacts_by_mailbox_list(
context,
(*group).grp_mb_list,
origin,
ids,
check_self,
);
}
}
}
cur = if !cur.is_null() {
(*cur).next
} else {
ptr::null_mut()
}
}
}
unsafe fn dc_add_or_lookup_contacts_by_mailbox_list(
context: &Context,
mb_list: *const mailimf_mailbox_list,
origin: Origin,
ids: &mut Vec<u32>,
check_self: *mut libc::c_int,
) {
if mb_list.is_null() {
return;
}
let mut cur: *mut clistiter = (*(*mb_list).mb_list).first;
while !cur.is_null() {
let mb: *mut mailimf_mailbox = (if !cur.is_null() {
(*cur).data
} else {
ptr::null_mut()
}) as *mut mailimf_mailbox;
if !mb.is_null() {
add_or_lookup_contact_by_addr(
context,
(*mb).mb_display_name,
(*mb).mb_addr_spec,
origin,
ids,
check_self,
);
}
cur = if !cur.is_null() {
(*cur).next
} else {
ptr::null_mut()
}
}
}
/// Add contacts to database on receiving messages.
unsafe fn add_or_lookup_contact_by_addr(
context: &Context,
display_name_enc: *const libc::c_char,
addr_spec: *const libc::c_char,
origin: Origin,
ids: &mut Vec<u32>,
mut check_self: *mut libc::c_int,
) {
/* is addr_spec equal to SELF? */
let mut dummy: libc::c_int = 0;
if check_self.is_null() {
check_self = &mut dummy
}
if addr_spec.is_null() {
return;
}
*check_self = 0;
let self_addr = context
.sql
.get_config(context, "configured_addr")
.unwrap_or_default();
if addr_cmp(self_addr, as_str(addr_spec)) {
*check_self = 1;
}
if 0 != *check_self {
return;
}
/* add addr_spec if missing, update otherwise */
let mut display_name_dec = "".to_string();
if !display_name_enc.is_null() {
let tmp = as_str(dc_decode_header_words(display_name_enc));
display_name_dec = normalize_name(&tmp);
}
/*can be NULL*/
let row_id = Contact::add_or_lookup(context, display_name_dec, as_str(addr_spec), origin)
.map(|(id, _)| id)
.unwrap_or_default();
if 0 != row_id {
if !ids.contains(&row_id) {
ids.push(row_id);
}
};
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_hex_hash() {
let data = "hello world";
let res = hex_hash(data);
assert_eq!(res, "b94d27b9934d3e08");
}
}
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