448 lines
15 KiB
Rust
448 lines
15 KiB
Rust
use std::collections::BTreeMap;
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use std::sync::Arc;
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use anyhow::{anyhow, bail, Result};
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use boitalettres::proto::res::body::Data as Body;
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use boitalettres::proto::{Request, Response};
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use imap_codec::types::command::{CommandBody, StatusAttribute};
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use imap_codec::types::core::NonZeroBytes;
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use imap_codec::types::datetime::MyDateTime;
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use imap_codec::types::flag::{Flag, FlagNameAttribute};
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use imap_codec::types::mailbox::{ListMailbox, Mailbox as MailboxCodec};
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use imap_codec::types::response::{Code, Data, StatusAttributeValue};
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use crate::imap::command::anonymous;
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use crate::imap::flow;
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use crate::imap::mailbox_view::MailboxView;
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use crate::mail::mailbox::Mailbox;
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use crate::mail::uidindex::*;
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use crate::mail::user::{User, INBOX, MAILBOX_HIERARCHY_DELIMITER};
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use crate::mail::IMF;
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pub struct AuthenticatedContext<'a> {
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pub req: &'a Request,
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pub user: &'a Arc<User>,
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}
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pub async fn dispatch(ctx: AuthenticatedContext<'_>) -> Result<(Response, flow::Transition)> {
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match &ctx.req.command.body {
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CommandBody::Create { mailbox } => ctx.create(mailbox).await,
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CommandBody::Delete { mailbox } => ctx.delete(mailbox).await,
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CommandBody::Rename {
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mailbox,
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new_mailbox,
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} => ctx.rename(mailbox, new_mailbox).await,
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CommandBody::Lsub {
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reference,
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mailbox_wildcard,
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} => ctx.list(reference, mailbox_wildcard, true).await,
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CommandBody::List {
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reference,
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mailbox_wildcard,
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} => ctx.list(reference, mailbox_wildcard, false).await,
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CommandBody::Status {
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mailbox,
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attributes,
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} => ctx.status(mailbox, attributes).await,
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CommandBody::Subscribe { mailbox } => ctx.subscribe(mailbox).await,
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CommandBody::Unsubscribe { mailbox } => ctx.unsubscribe(mailbox).await,
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CommandBody::Select { mailbox } => ctx.select(mailbox).await,
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CommandBody::Examine { mailbox } => ctx.examine(mailbox).await,
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CommandBody::Append {
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mailbox,
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flags,
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date,
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message,
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} => ctx.append(mailbox, flags, date, message).await,
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_ => {
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let ctx = anonymous::AnonymousContext {
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req: ctx.req,
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login_provider: None,
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};
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anonymous::dispatch(ctx).await
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}
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}
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}
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// --- PRIVATE ---
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impl<'a> AuthenticatedContext<'a> {
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async fn create(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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if name == INBOX {
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return Ok((
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Response::bad("Cannot create INBOX")?,
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flow::Transition::None,
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));
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}
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match self.user.create_mailbox(&name).await {
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Ok(()) => Ok((Response::ok("CREATE complete")?, flow::Transition::None)),
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Err(e) => Ok((Response::no(&e.to_string())?, flow::Transition::None)),
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}
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}
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async fn delete(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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match self.user.delete_mailbox(&name).await {
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Ok(()) => Ok((Response::ok("DELETE complete")?, flow::Transition::None)),
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Err(e) => Ok((Response::no(&e.to_string())?, flow::Transition::None)),
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}
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}
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async fn rename(
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self,
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mailbox: &MailboxCodec,
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new_mailbox: &MailboxCodec,
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) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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let new_name = String::try_from(new_mailbox.clone())?;
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match self.user.rename_mailbox(&name, &new_name).await {
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Ok(()) => Ok((Response::ok("RENAME complete")?, flow::Transition::None)),
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Err(e) => Ok((Response::no(&e.to_string())?, flow::Transition::None)),
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}
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}
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async fn list(
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self,
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reference: &MailboxCodec,
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mailbox_wildcard: &ListMailbox,
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is_lsub: bool,
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) -> Result<(Response, flow::Transition)> {
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let reference = String::try_from(reference.clone())?;
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if !reference.is_empty() {
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return Ok((
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Response::bad("References not supported")?,
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flow::Transition::None,
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));
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}
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let wildcard = String::try_from(mailbox_wildcard.clone())?;
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if wildcard.is_empty() {
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if is_lsub {
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return Ok((
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Response::ok("LSUB complete")?.with_body(vec![Data::Lsub {
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items: vec![],
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delimiter: Some(MAILBOX_HIERARCHY_DELIMITER),
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mailbox: "".try_into().unwrap(),
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}]),
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flow::Transition::None,
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));
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} else {
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return Ok((
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Response::ok("LIST complete")?.with_body(vec![Data::List {
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items: vec![],
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delimiter: Some(MAILBOX_HIERARCHY_DELIMITER),
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mailbox: "".try_into().unwrap(),
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}]),
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flow::Transition::None,
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));
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}
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}
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let mailboxes = self.user.list_mailboxes().await?;
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let mut vmailboxes = BTreeMap::new();
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for mb in mailboxes.iter() {
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for (i, _) in mb.match_indices(MAILBOX_HIERARCHY_DELIMITER) {
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if i > 0 {
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let smb = &mb[..i];
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vmailboxes.entry(smb).or_insert(false);
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}
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}
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vmailboxes.insert(mb, true);
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}
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let mut ret = vec![];
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for (mb, is_real) in vmailboxes.iter() {
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if matches_wildcard(&wildcard, mb) {
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let mailbox = mb
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.to_string()
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.try_into()
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.map_err(|_| anyhow!("invalid mailbox name"))?;
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let mut items = vec![FlagNameAttribute::Extension(
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"Subscribed".try_into().unwrap(),
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)];
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if !*is_real {
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items.push(FlagNameAttribute::Noselect);
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}
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if is_lsub {
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ret.push(Data::Lsub {
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items,
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delimiter: Some(MAILBOX_HIERARCHY_DELIMITER),
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mailbox,
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});
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} else {
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ret.push(Data::List {
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items,
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delimiter: Some(MAILBOX_HIERARCHY_DELIMITER),
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mailbox,
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});
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}
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}
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}
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let msg = if is_lsub {
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"LSUB completed"
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} else {
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"LIST completed"
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};
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Ok((Response::ok(msg)?.with_body(ret), flow::Transition::None))
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}
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async fn status(
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self,
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mailbox: &MailboxCodec,
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attributes: &[StatusAttribute],
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) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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let mb_opt = self.user.open_mailbox(&name).await?;
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let mb = match mb_opt {
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Some(mb) => mb,
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None => {
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return Ok((
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Response::no("Mailbox does not exist")?,
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flow::Transition::None,
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))
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}
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};
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let (view, _data) = MailboxView::new(mb).await?;
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let mut ret_attrs = vec![];
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for attr in attributes.iter() {
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ret_attrs.push(match attr {
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StatusAttribute::Messages => StatusAttributeValue::Messages(view.exists()?),
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StatusAttribute::Unseen => StatusAttributeValue::Unseen(view.unseen_count() as u32),
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StatusAttribute::Recent => StatusAttributeValue::Recent(view.recent()?),
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StatusAttribute::UidNext => StatusAttributeValue::UidNext(view.uidnext()),
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StatusAttribute::UidValidity => {
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StatusAttributeValue::UidValidity(view.uidvalidity())
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}
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});
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}
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let data = vec![Body::Data(Data::Status {
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mailbox: mailbox.clone(),
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attributes: ret_attrs,
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})];
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Ok((
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Response::ok("STATUS completed")?.with_body(data),
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flow::Transition::None,
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))
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}
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async fn subscribe(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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if self.user.has_mailbox(&name).await? {
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Ok((Response::ok("SUBSCRIBE complete")?, flow::Transition::None))
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} else {
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Ok((
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Response::bad(&format!("Mailbox {} does not exist", name))?,
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flow::Transition::None,
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))
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}
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}
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async fn unsubscribe(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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if self.user.has_mailbox(&name).await? {
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Ok((
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Response::bad(&format!(
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"Cannot unsubscribe from mailbox {}: not supported by Aerogramme",
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name
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))?,
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flow::Transition::None,
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))
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} else {
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Ok((
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Response::bad(&format!("Mailbox {} does not exist", name))?,
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flow::Transition::None,
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))
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}
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}
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/*
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* TRACE BEGIN ---
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Example: C: A142 SELECT INBOX
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S: * 172 EXISTS
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S: * 1 RECENT
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S: * OK [UNSEEN 12] Message 12 is first unseen
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S: * OK [UIDVALIDITY 3857529045] UIDs valid
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S: * OK [UIDNEXT 4392] Predicted next UID
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S: * FLAGS (\Answered \Flagged \Deleted \Seen \Draft)
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S: * OK [PERMANENTFLAGS (\Deleted \Seen \*)] Limited
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S: A142 OK [READ-WRITE] SELECT completed
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--- a mailbox with no unseen message -> no unseen entry
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NOTES:
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RFC3501 (imap4rev1) says if there is no OK [UNSEEN] response, client must make no assumption,
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it is therefore correct to not return it even if there are unseen messages
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RFC9051 (imap4rev2) says that OK [UNSEEN] responses are deprecated after SELECT and EXAMINE
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For Aerogramme, we just don't send the OK [UNSEEN], it's correct to do in both specifications.
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20 select "INBOX.achats"
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* FLAGS (\Answered \Flagged \Deleted \Seen \Draft $Forwarded JUNK $label1)
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* OK [PERMANENTFLAGS (\Answered \Flagged \Deleted \Seen \Draft $Forwarded JUNK $label1 \*)] Flags permitted.
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* 88 EXISTS
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* 0 RECENT
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* OK [UIDVALIDITY 1347986788] UIDs valid
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* OK [UIDNEXT 91] Predicted next UID
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* OK [HIGHESTMODSEQ 72] Highest
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20 OK [READ-WRITE] Select completed (0.001 + 0.000 secs).
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* TRACE END ---
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*/
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async fn select(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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let mb_opt = self.user.open_mailbox(&name).await?;
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let mb = match mb_opt {
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Some(mb) => mb,
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None => {
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return Ok((
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Response::no("Mailbox does not exist")?,
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flow::Transition::None,
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))
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}
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};
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tracing::info!(username=%self.user.username, mailbox=%name, "mailbox.selected");
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let (mb, data) = MailboxView::new(mb).await?;
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Ok((
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Response::ok("Select completed")?
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.with_extra_code(Code::ReadWrite)
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.with_body(data),
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flow::Transition::Select(mb),
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))
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}
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async fn examine(self, mailbox: &MailboxCodec) -> Result<(Response, flow::Transition)> {
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let name = String::try_from(mailbox.clone())?;
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let mb_opt = self.user.open_mailbox(&name).await?;
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let mb = match mb_opt {
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Some(mb) => mb,
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None => {
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return Ok((
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Response::no("Mailbox does not exist")?,
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flow::Transition::None,
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))
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}
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};
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tracing::info!(username=%self.user.username, mailbox=%name, "mailbox.examined");
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let (mb, data) = MailboxView::new(mb).await?;
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Ok((
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Response::ok("Examine completed")?
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.with_extra_code(Code::ReadOnly)
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.with_body(data),
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flow::Transition::Examine(mb),
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))
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}
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async fn append(
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self,
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mailbox: &MailboxCodec,
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flags: &[Flag],
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date: &Option<MyDateTime>,
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message: &NonZeroBytes,
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) -> Result<(Response, flow::Transition)> {
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match self.append_internal(mailbox, flags, date, message).await {
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Ok((_mb, uidvalidity, uid)) => Ok((
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Response::ok("APPEND completed")?.with_extra_code(Code::Other(
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"APPENDUID".try_into().unwrap(),
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Some(format!("{} {}", uidvalidity, uid)),
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)),
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flow::Transition::None,
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)),
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Err(e) => Ok((Response::no(&e.to_string())?, flow::Transition::None)),
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}
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}
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pub(crate) async fn append_internal(
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self,
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mailbox: &MailboxCodec,
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flags: &[Flag],
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date: &Option<MyDateTime>,
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message: &NonZeroBytes,
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) -> Result<(Arc<Mailbox>, ImapUidvalidity, ImapUidvalidity)> {
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let name = String::try_from(mailbox.clone())?;
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let mb_opt = self.user.open_mailbox(&name).await?;
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let mb = match mb_opt {
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Some(mb) => mb,
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None => bail!("Mailbox does not exist"),
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};
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if date.is_some() {
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bail!("Cannot set date when appending message");
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}
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let msg = IMF::try_from(message.as_slice())
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.map_err(|_| anyhow!("Could not parse e-mail message"))?;
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let flags = flags.iter().map(|x| x.to_string()).collect::<Vec<_>>();
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// TODO: filter allowed flags? ping @Quentin
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let (uidvalidity, uid) = mb.append(msg, None, &flags[..]).await?;
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Ok((mb, uidvalidity, uid))
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}
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}
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fn matches_wildcard(wildcard: &str, name: &str) -> bool {
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let wildcard = wildcard.chars().collect::<Vec<char>>();
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let name = name.chars().collect::<Vec<char>>();
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let mut matches = vec![vec![false; wildcard.len() + 1]; name.len() + 1];
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for i in 0..=name.len() {
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for j in 0..=wildcard.len() {
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matches[i][j] = (i == 0 && j == 0)
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|| (j > 0
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&& matches[i][j - 1]
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&& (wildcard[j - 1] == '%' || wildcard[j - 1] == '*'))
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|| (i > 0
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&& j > 0
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&& matches[i - 1][j - 1]
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&& wildcard[j - 1] == name[i - 1]
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&& wildcard[j - 1] != '%'
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&& wildcard[j - 1] != '*')
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|| (i > 0
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&& j > 0
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&& matches[i - 1][j]
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&& (wildcard[j - 1] == '*'
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|| (wildcard[j - 1] == '%' && name[i - 1] != MAILBOX_HIERARCHY_DELIMITER)));
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}
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}
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matches[name.len()][wildcard.len()]
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_wildcard_matches() {
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assert!(matches_wildcard("INBOX", "INBOX"));
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assert!(matches_wildcard("*", "INBOX"));
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assert!(matches_wildcard("%", "INBOX"));
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assert!(!matches_wildcard("%", "Test.Azerty"));
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assert!(!matches_wildcard("INBOX.*", "INBOX"));
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assert!(matches_wildcard("Sent.*", "Sent.A"));
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assert!(matches_wildcard("Sent.*", "Sent.A.B"));
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assert!(!matches_wildcard("Sent.%", "Sent.A.B"));
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}
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}
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