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//!
//! The module provides automatic lookup of configuration
//! for email providers based on the built-in [provider database],
//! [Mozilla Thunderbird Autoconfiguration protocol]
//! and [Outlook's Autodiscover].
//!
//! [provider database]: crate::provider
//! [Mozilla Thunderbird Autoconfiguration protocol]: auto_mozilla
//! [Outlook's Autodiscover]: auto_outlook
mod auto_mozilla;
mod auto_outlook;
pub(crate) mod server_params;
use anyhow::{Context as _, Result, bail, ensure, format_err};
use auto_mozilla::moz_autoconfigure;
use auto_outlook::outlk_autodiscover;
use deltachat_contact_tools::{EmailAddress, addr_normalize};
use futures::FutureExt;
use futures_lite::FutureExt as _;
use percent_encoding::utf8_percent_encode;
use server_params::{ServerParams, expand_param_vector};
use tokio::task;
use crate::config::{self, Config};
use crate::constants::NON_ALPHANUMERIC_WITHOUT_DOT;
use crate::context::Context;
use crate::imap::Imap;
use crate::log::warn;
use crate::login_param::EnteredCertificateChecks;
pub use crate::login_param::EnteredLoginParam;
use crate::message::Message;
use crate::net::proxy::ProxyConfig;
use crate::oauth2::get_oauth2_addr;
use crate::provider::{Protocol, Provider, Socket, UsernamePattern};
use crate::qr::{login_param_from_account_qr, login_param_from_login_qr};
use crate::smtp::Smtp;
use crate::sync::Sync::*;
use crate::tools::time;
use crate::transport::{
ConfiguredCertificateChecks, ConfiguredLoginParam, ConfiguredServerLoginParam,
ConnectionCandidate, send_sync_transports,
};
use crate::{EventType, stock_str};
use crate::{chat, provider};
/// Maximum number of relays
/// see <https://github.com/chatmail/core/issues/7608>
pub(crate) const MAX_TRANSPORT_RELAYS: usize = 5;
macro_rules! progress {
($context:tt, $progress:expr, $comment:expr) => {
assert!(
$progress <= 1000,
"value in range 0..1000 expected with: 0=error, 1..999=progress, 1000=success"
);
$context.emit_event($crate::events::EventType::ConfigureProgress {
progress: $progress,
comment: $comment,
});
};
($context:tt, $progress:expr) => {
progress!($context, $progress, None);
};
}
impl Context {
/// Checks if the context is already configured.
pub async fn is_configured(&self) -> Result<bool> {
self.sql.exists("SELECT COUNT(*) FROM transports", ()).await
}
/// Configures this account with the currently provided parameters.
///
/// Deprecated since 2025-02; use `add_transport_from_qr()`
/// or `add_or_update_transport()` instead.
pub async fn configure(&self) -> Result<()> {
let mut param = EnteredLoginParam::load(self).await?;
self.add_transport_inner(&mut param).await
}
/// Configures a new email account using the provided parameters
/// and adds it as a transport.
///
/// If the email address is the same as an existing transport,
/// then this existing account will be reconfigured instead of a new one being added.
///
/// This function stops and starts IO as needed.
///
/// Usually it will be enough to only set `addr` and `imap.password`,
/// and all the other settings will be autoconfigured.
///
/// During configuration, ConfigureProgress events are emitted;
/// they indicate a successful configuration as well as errors
/// and may be used to create a progress bar.
/// This function will return after configuration is finished.
///
/// If configuration is successful,
/// the working server parameters will be saved
/// and used for connecting to the server.
/// The parameters entered by the user will be saved separately
/// so that they can be prefilled when the user opens the server-configuration screen again.
///
/// See also:
/// - [Self::is_configured()] to check whether there is
/// at least one working transport.
/// - [Self::add_transport_from_qr()] to add a transport
/// from a server encoded in a QR code.
/// - [Self::list_transports()] to get a list of all configured transports.
/// - [Self::delete_transport()] to remove a transport.
pub async fn add_or_update_transport(&self, param: &mut EnteredLoginParam) -> Result<()> {
self.stop_io().await;
let result = self.add_transport_inner(param).await;
if result.is_err() {
if let Ok(true) = self.is_configured().await {
self.start_io().await;
}
return result;
}
self.start_io().await;
Ok(())
}
pub(crate) async fn add_transport_inner(&self, param: &mut EnteredLoginParam) -> Result<()> {
ensure!(
!self.scheduler.is_running().await,
"cannot configure, already running"
);
ensure!(
self.sql.is_open().await,
"cannot configure, database not opened."
);
param.addr = addr_normalize(¶m.addr);
let cancel_channel = self.alloc_ongoing().await?;
let res = self
.inner_configure(param)
.race(cancel_channel.recv().map(|_| Err(format_err!("Canceled"))))
.await;
self.free_ongoing().await;
if let Err(err) = res.as_ref() {
// We are using Anyhow's .context() and to show the
// inner error, too, we need the {:#}:
let error_msg = stock_str::configuration_failed(self, &format!("{err:#}")).await;
progress!(self, 0, Some(error_msg.clone()));
bail!(error_msg);
} else {
param.save(self).await?;
progress!(self, 1000);
}
res
}
/// Adds a new email account as a transport
/// using the server encoded in the QR code.
/// See [Self::add_or_update_transport].
pub async fn add_transport_from_qr(&self, qr: &str) -> Result<()> {
self.stop_io().await;
let result = async move {
let mut param = match crate::qr::check_qr(self, qr).await? {
crate::qr::Qr::Account { .. } => login_param_from_account_qr(self, qr).await?,
crate::qr::Qr::Login { address, options } => {
login_param_from_login_qr(&address, options)?
}
_ => bail!("QR code does not contain account"),
};
self.add_transport_inner(&mut param).await?;
Ok(())
}
.await;
if result.is_err() {
if let Ok(true) = self.is_configured().await {
self.start_io().await;
}
return result;
}
self.start_io().await;
Ok(())
}
/// Returns the list of all email accounts that are used as a transport in the current profile.
/// Use [Self::add_or_update_transport()] to add or change a transport
/// and [Self::delete_transport()] to delete a transport.
pub async fn list_transports(&self) -> Result<Vec<EnteredLoginParam>> {
let transports = self
.sql
.query_map_vec("SELECT entered_param FROM transports", (), |row| {
let entered_param: String = row.get(0)?;
let transport: EnteredLoginParam = serde_json::from_str(&entered_param)?;
Ok(transport)
})
.await?;
Ok(transports)
}
/// Returns the number of configured transports.
pub async fn count_transports(&self) -> Result<usize> {
self.sql.count("SELECT COUNT(*) FROM transports", ()).await
}
/// Removes the transport with the specified email address
/// (i.e. [EnteredLoginParam::addr]).
pub async fn delete_transport(&self, addr: &str) -> Result<()> {
let now = time();
let removed_transport_id = self
.sql
.transaction(|transaction| {
let primary_addr = transaction.query_row(
"SELECT value FROM config WHERE keyname='configured_addr'",
(),
|row| {
let addr: String = row.get(0)?;
Ok(addr)
},
)?;
if primary_addr == addr {
bail!("Cannot delete primary transport");
}
let (transport_id, add_timestamp) = transaction.query_row(
"DELETE FROM transports WHERE addr=? RETURNING id, add_timestamp",
(addr,),
|row| {
let id: u32 = row.get(0)?;
let add_timestamp: i64 = row.get(1)?;
Ok((id, add_timestamp))
},
)?;
transaction.execute("DELETE FROM imap WHERE transport_id=?", (transport_id,))?;
transaction.execute(
"DELETE FROM imap_sync WHERE transport_id=?",
(transport_id,),
)?;
// Removal timestamp should not be lower than addition timestamp
// to be accepted by other devices when synced.
let remove_timestamp = std::cmp::max(now, add_timestamp);
transaction.execute(
"INSERT INTO removed_transports (addr, remove_timestamp)
VALUES (?, ?)
ON CONFLICT (addr)
DO UPDATE SET remove_timestamp = excluded.remove_timestamp",
(addr, remove_timestamp),
)?;
Ok(transport_id)
})
.await?;
send_sync_transports(self).await?;
self.quota.write().await.remove(&removed_transport_id);
Ok(())
}
async fn inner_configure(&self, param: &EnteredLoginParam) -> Result<()> {
info!(self, "Configure ...");
let old_addr = self.get_config(Config::ConfiguredAddr).await?;
if old_addr.is_some()
&& !self
.sql
.exists(
"SELECT COUNT(*) FROM transports WHERE addr=?",
(¶m.addr,),
)
.await?
{
// Should be checked before `MvboxMove` because the latter makes no sense in presense of
// `OnlyFetchMvbox` and even grayed out in the UIs in this case.
if self.get_config(Config::OnlyFetchMvbox).await?.as_deref() != Some("0") {
bail!(
"To use additional relays, disable the legacy option \"Settings / Advanced / Only Fetch from DeltaChat Folder\"."
);
}
if self.get_config(Config::MvboxMove).await?.as_deref() != Some("0") {
bail!(
"To use additional relays, disable the legacy option \"Settings / Advanced / Move automatically to DeltaChat Folder\"."
);
}
if self.get_config(Config::ShowEmails).await?.as_deref() != Some("2") {
bail!(
"To use additional relays, set the legacy option \"Settings / Advanced / Show Classic Emails\" to \"All\"."
);
}
if self
.sql
.count("SELECT COUNT(*) FROM transports", ())
.await?
>= MAX_TRANSPORT_RELAYS
{
bail!(
"You have reached the maximum number of relays ({}).",
MAX_TRANSPORT_RELAYS
)
}
}
let provider = match configure(self, param).await {
Err(error) => {
// Log entered and actual params
let configured_param = get_configured_param(self, param).await;
warn!(
self,
"configure failed: Entered params: {}. Used params: {}. Error: {error}.",
param.to_string(),
configured_param
.map(|param| param.to_string())
.unwrap_or("error".to_owned())
);
return Err(error);
}
Ok(provider) => provider,
};
self.set_config_internal(Config::NotifyAboutWrongPw, Some("1"))
.await?;
on_configure_completed(self, provider).await?;
Ok(())
}
}
async fn on_configure_completed(
context: &Context,
provider: Option<&'static Provider>,
) -> Result<()> {
if let Some(provider) = provider {
if let Some(config_defaults) = provider.config_defaults {
for def in config_defaults {
if !context.config_exists(def.key).await? {
info!(context, "apply config_defaults {}={}", def.key, def.value);
context
.set_config_ex(Nosync, def.key, Some(def.value))
.await?;
} else {
info!(
context,
"skip already set config_defaults {}={}", def.key, def.value
);
}
}
}
if !provider.after_login_hint.is_empty() {
let mut msg = Message::new_text(provider.after_login_hint.to_string());
if chat::add_device_msg(context, Some("core-provider-info"), Some(&mut msg))
.await
.is_err()
{
warn!(context, "cannot add after_login_hint as core-provider-info");
}
}
}
Ok(())
}
/// Retrieves data from autoconfig and provider database
/// to transform user-entered login parameters into complete configuration.
async fn get_configured_param(
ctx: &Context,
param: &EnteredLoginParam,
) -> Result<ConfiguredLoginParam> {
ensure!(!param.addr.is_empty(), "Missing email address.");
ensure!(!param.imap.password.is_empty(), "Missing (IMAP) password.");
// SMTP password is an "advanced" setting. If unset, use the same password as for IMAP.
let smtp_password = if param.smtp.password.is_empty() {
param.imap.password.clone()
} else {
param.smtp.password.clone()
};
let mut addr = param.addr.clone();
if param.oauth2 {
// the used oauth2 addr may differ, check this.
// if get_oauth2_addr() is not available in the oauth2 implementation, just use the given one.
progress!(ctx, 10);
if let Some(oauth2_addr) = get_oauth2_addr(ctx, ¶m.addr, ¶m.imap.password)
.await?
.and_then(|e| e.parse().ok())
{
info!(ctx, "Authorized address is {}", oauth2_addr);
addr = oauth2_addr;
ctx.sql
.set_raw_config("addr", Some(param.addr.as_str()))
.await?;
}
progress!(ctx, 20);
}
// no oauth? - just continue it's no error
let parsed = EmailAddress::new(¶m.addr).context("Bad email-address")?;
let param_domain = parsed.domain;
progress!(ctx, 200);
let provider;
let param_autoconfig;
if param.imap.server.is_empty()
&& param.imap.port == 0
&& param.imap.security == Socket::Automatic
&& param.imap.user.is_empty()
&& param.smtp.server.is_empty()
&& param.smtp.port == 0
&& param.smtp.security == Socket::Automatic
&& param.smtp.user.is_empty()
{
// no advanced parameters entered by the user: query provider-database or do Autoconfig
info!(
ctx,
"checking internal provider-info for offline autoconfig"
);
provider = provider::get_provider_info(¶m_domain);
if let Some(provider) = provider {
if provider.server.is_empty() {
info!(ctx, "Offline autoconfig found, but no servers defined.");
param_autoconfig = None;
} else {
info!(ctx, "Offline autoconfig found.");
let servers = provider
.server
.iter()
.map(|s| ServerParams {
protocol: s.protocol,
socket: s.socket,
hostname: s.hostname.to_string(),
port: s.port,
username: match s.username_pattern {
UsernamePattern::Email => param.addr.to_string(),
UsernamePattern::Emaillocalpart => {
if let Some(at) = param.addr.find('@') {
param.addr.split_at(at).0.to_string()
} else {
param.addr.to_string()
}
}
},
})
.collect();
param_autoconfig = Some(servers)
}
} else {
// Try receiving autoconfig
info!(ctx, "No offline autoconfig found.");
param_autoconfig = get_autoconfig(ctx, param, ¶m_domain).await;
}
} else {
provider = None;
param_autoconfig = None;
}
progress!(ctx, 500);
let mut servers = param_autoconfig.unwrap_or_default();
if !servers
.iter()
.any(|server| server.protocol == Protocol::Imap)
{
servers.push(ServerParams {
protocol: Protocol::Imap,
hostname: param.imap.server.clone(),
port: param.imap.port,
socket: param.imap.security,
username: param.imap.user.clone(),
})
}
if !servers
.iter()
.any(|server| server.protocol == Protocol::Smtp)
{
servers.push(ServerParams {
protocol: Protocol::Smtp,
hostname: param.smtp.server.clone(),
port: param.smtp.port,
socket: param.smtp.security,
username: param.smtp.user.clone(),
})
}
let servers = expand_param_vector(servers, ¶m.addr, ¶m_domain);
let configured_login_param = ConfiguredLoginParam {
addr,
imap: servers
.iter()
.filter_map(|params| {
let Ok(security) = params.socket.try_into() else {
return None;
};
if params.protocol == Protocol::Imap {
Some(ConfiguredServerLoginParam {
connection: ConnectionCandidate {
host: params.hostname.clone(),
port: params.port,
security,
},
user: params.username.clone(),
})
} else {
None
}
})
.collect(),
imap_user: param.imap.user.clone(),
imap_password: param.imap.password.clone(),
smtp: servers
.iter()
.filter_map(|params| {
let Ok(security) = params.socket.try_into() else {
return None;
};
if params.protocol == Protocol::Smtp {
Some(ConfiguredServerLoginParam {
connection: ConnectionCandidate {
host: params.hostname.clone(),
port: params.port,
security,
},
user: params.username.clone(),
})
} else {
None
}
})
.collect(),
smtp_user: param.smtp.user.clone(),
smtp_password,
provider,
certificate_checks: match param.certificate_checks {
EnteredCertificateChecks::Automatic => ConfiguredCertificateChecks::Automatic,
EnteredCertificateChecks::Strict => ConfiguredCertificateChecks::Strict,
EnteredCertificateChecks::AcceptInvalidCertificates
| EnteredCertificateChecks::AcceptInvalidCertificates2 => {
ConfiguredCertificateChecks::AcceptInvalidCertificates
}
},
oauth2: param.oauth2,
};
Ok(configured_login_param)
}
async fn configure(ctx: &Context, param: &EnteredLoginParam) -> Result<Option<&'static Provider>> {
progress!(ctx, 1);
let ctx2 = ctx.clone();
let update_device_chats_handle = task::spawn(async move { ctx2.update_device_chats().await });
let configured_param = get_configured_param(ctx, param).await?;
let proxy_config = ProxyConfig::load(ctx).await?;
let strict_tls = configured_param.strict_tls(proxy_config.is_some());
progress!(ctx, 550);
// Spawn SMTP configuration task
// to try SMTP while connecting to IMAP.
let context_smtp = ctx.clone();
let smtp_param = configured_param.smtp.clone();
let smtp_password = configured_param.smtp_password.clone();
let smtp_addr = configured_param.addr.clone();
let proxy_config2 = proxy_config.clone();
let smtp_config_task = task::spawn(async move {
let mut smtp = Smtp::new();
smtp.connect(
&context_smtp,
&smtp_param,
&smtp_password,
&proxy_config2,
&smtp_addr,
strict_tls,
configured_param.oauth2,
)
.await?;
Ok::<(), anyhow::Error>(())
});
progress!(ctx, 600);
// Configure IMAP
let transport_id = 0;
let (_s, r) = async_channel::bounded(1);
let mut imap = Imap::new(ctx, transport_id, configured_param.clone(), r).await?;
let configuring = true;
if let Err(err) = imap.connect(ctx, configuring).await {
bail!(
"{}",
nicer_configuration_error(ctx, format!("{err:#}")).await
);
};
progress!(ctx, 850);
// Wait for SMTP configuration
smtp_config_task.await??;
progress!(ctx, 900);
let is_configured = ctx.is_configured().await?;
if !is_configured {
ctx.sql.set_raw_config("mvbox_move", Some("0")).await?;
ctx.sql.set_raw_config("only_fetch_mvbox", None).await?;
}
drop(imap);
progress!(ctx, 910);
let provider = configured_param.provider;
configured_param
.clone()
.save_to_transports_table(ctx, param, time())
.await?;
send_sync_transports(ctx).await?;
ctx.set_config_internal(Config::ConfiguredTimestamp, Some(&time().to_string()))
.await?;
progress!(ctx, 920);
ctx.set_config_internal(Config::FetchedExistingMsgs, config::from_bool(false))
.await?;
ctx.scheduler.interrupt_inbox().await;
progress!(ctx, 940);
update_device_chats_handle.await??;
ctx.sql.set_raw_config_bool("configured", true).await?;
ctx.emit_event(EventType::AccountsItemChanged);
Ok(provider)
}
/// Retrieve available autoconfigurations.
///
/// A. Search configurations from the domain used in the email-address
/// B. If we have no configuration yet, search configuration in Thunderbird's central database
async fn get_autoconfig(
ctx: &Context,
param: &EnteredLoginParam,
param_domain: &str,
) -> Option<Vec<ServerParams>> {
// Make sure to not encode `.` as `%2E` here.
// Some servers like murena.io on 2024-11-01 produce incorrect autoconfig XML
// when address is encoded.
// E.g.
// <https://autoconfig.murena.io/mail/config-v1.1.xml?emailaddress=foobar%40example%2Eorg>
// produced XML file with `<username>foobar@example%2Eorg</username>`
// resulting in failure to log in.
let param_addr_urlencoded =
utf8_percent_encode(¶m.addr, NON_ALPHANUMERIC_WITHOUT_DOT).to_string();
if let Ok(res) = moz_autoconfigure(
ctx,
&format!(
"https://autoconfig.{param_domain}/mail/config-v1.1.xml?emailaddress={param_addr_urlencoded}"
),
¶m.addr,
)
.await
{
return Some(res);
}
progress!(ctx, 300);
if let Ok(res) = moz_autoconfigure(
ctx,
// the doc does not mention `emailaddress=`, however, Thunderbird adds it, see <https://releases.mozilla.org/pub/thunderbird/>, which makes some sense
&format!(
"https://{}/.well-known/autoconfig/mail/config-v1.1.xml?emailaddress={}",
¶m_domain, ¶m_addr_urlencoded
),
¶m.addr,
)
.await
{
return Some(res);
}
progress!(ctx, 310);
// Outlook uses always SSL but different domains (this comment describes the next two steps)
if let Ok(res) = outlk_autodiscover(
ctx,
format!("https://{}/autodiscover/autodiscover.xml", ¶m_domain),
)
.await
{
return Some(res);
}
progress!(ctx, 320);
if let Ok(res) = outlk_autodiscover(
ctx,
format!(
"https://autodiscover.{}/autodiscover/autodiscover.xml",
¶m_domain
),
)
.await
{
return Some(res);
}
progress!(ctx, 330);
// always SSL for Thunderbird's database
if let Ok(res) = moz_autoconfigure(
ctx,
&format!("https://autoconfig.thunderbird.net/v1.1/{}", ¶m_domain),
¶m.addr,
)
.await
{
return Some(res);
}
None
}
async fn nicer_configuration_error(context: &Context, e: String) -> String {
if e.to_lowercase().contains("could not resolve")
|| e.to_lowercase().contains("connection attempts")
|| e.to_lowercase()
.contains("temporary failure in name resolution")
|| e.to_lowercase().contains("name or service not known")
|| e.to_lowercase()
.contains("failed to lookup address information")
{
return stock_str::error_no_network(context).await;
}
e
}
#[derive(Debug, thiserror::Error)]
pub enum Error {
#[error("Invalid email address: {0:?}")]
InvalidEmailAddress(String),
#[error("XML error at position {position}: {error}")]
InvalidXml {
position: u64,
#[source]
error: quick_xml::Error,
},
#[error("Number of redirection is exceeded")]
Redirection,
#[error("{0:#}")]
Other(#[from] anyhow::Error),
}
#[cfg(test)]
mod tests {
use super::*;
use crate::config::Config;
use crate::login_param::EnteredServerLoginParam;
use crate::test_utils::TestContext;
#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn test_no_panic_on_bad_credentials() {
let t = TestContext::new().await;
t.set_config(Config::Addr, Some("probably@unexistant.addr"))
.await
.unwrap();
t.set_config(Config::MailPw, Some("123456")).await.unwrap();
assert!(t.configure().await.is_err());
}
#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
async fn test_get_configured_param() -> Result<()> {
let t = &TestContext::new().await;
let entered_param = EnteredLoginParam {
addr: "alice@example.org".to_string(),
imap: EnteredServerLoginParam {
user: "alice@example.net".to_string(),
password: "foobar".to_string(),
..Default::default()
},
..Default::default()
};
let configured_param = get_configured_param(t, &entered_param).await?;
assert_eq!(configured_param.imap_user, "alice@example.net");
assert_eq!(configured_param.smtp_user, "");
Ok(())
}
}
|