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Add LMTP support

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pull/1/head
Quentin 10 months ago
parent 2bbcb119c4 0700e27127
commit 6b5b53916e
Signed by: quentin
GPG Key ID: E9602264D639FF68
21 changed files with 1289 additions and 268 deletions
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Cargo.lock generated
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@ -8,7 +8,7 @@ version = "0.4.1"
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@ -19,9 +19,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
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[[package]]
name = "serde"
@ -1700,6 +2038,16 @@ version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
[[package]]
name = "signal-hook"
version = "0.3.14"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a253b5e89e2698464fc26b545c9edceb338e18a89effeeecfea192c3025be29d"
dependencies = [
"libc",
"signal-hook-registry",
]
[[package]]
name = "signal-hook-registry"
version = "1.4.0"
@ -1737,6 +2085,62 @@ version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
[[package]]
name = "smol"
version = "1.2.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "85cf3b5351f3e783c1d79ab5fc604eeed8b8ae9abd36b166e8b87a089efd85e4"
dependencies = [
"async-channel",
"async-executor",
"async-fs",
"async-io",
"async-lock",
"async-net",
"async-process",
"blocking",
"futures-lite",
"once_cell",
]
[[package]]
name = "smtp-message"
version = "0.1.0"
source = "git+http://github.com/Alexis211/kannader?branch=feature/lmtp#8c01360230f21c20d4c2da462dcf62e8a801ce0f"
dependencies = [
"auto_enums",
"futures",
"idna",
"lazy_static",
"nom 6.1.2",
"pin-project",
"regex-automata",
"serde",
]
[[package]]
name = "smtp-server"
version = "0.1.0"
source = "git+http://github.com/Alexis211/kannader?branch=feature/lmtp#8c01360230f21c20d4c2da462dcf62e8a801ce0f"
dependencies = [
"async-trait",
"chrono",
"duplexify",
"futures",
"smol",
"smtp-message",
"smtp-server-types",
]
[[package]]
name = "smtp-server-types"
version = "0.1.0"
source = "git+http://github.com/Alexis211/kannader?branch=feature/lmtp#8c01360230f21c20d4c2da462dcf62e8a801ce0f"
dependencies = [
"serde",
"smtp-message",
]
[[package]]
name = "socket2"
version = "0.4.4"
@ -1852,6 +2256,17 @@ dependencies = [
"once_cell",
]
[[package]]
name = "time"
version = "0.1.44"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
dependencies = [
"libc",
"wasi 0.10.0+wasi-snapshot-preview1",
"winapi",
]
[[package]]
name = "tinyvec"
version = "1.6.0"
@ -1869,9 +2284,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
[[package]]
name = "tokio"
version = "1.18.2"
version = "1.19.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4903bf0427cf68dddd5aa6a93220756f8be0c34fcfa9f5e6191e103e15a31395"
checksum = "c51a52ed6686dd62c320f9b89299e9dfb46f730c7a48e635c19f21d116cb1439"
dependencies = [
"bytes",
"libc",
@ -1880,7 +2295,7 @@ dependencies = [
"num_cpus",
"once_cell",
"parking_lot",
"pin-project-lite",
"pin-project-lite 0.2.9",
"signal-hook-registry",
"socket2",
"tokio-macros",
@ -1889,9 +2304,9 @@ dependencies = [
[[package]]
name = "tokio-macros"
version = "1.7.0"
version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b557f72f448c511a979e2564e55d74e6c4432fc96ff4f6241bc6bded342643b7"
checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
dependencies = [
"proc-macro2",
"quote",
@ -1910,12 +2325,12 @@ dependencies = [
[[package]]
name = "tokio-stream"
version = "0.1.8"
version = "0.1.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "50145484efff8818b5ccd256697f36863f587da82cf8b409c53adf1e840798e3"
checksum = "df54d54117d6fdc4e4fea40fe1e4e566b3505700e148a6827e59b34b0d2600d9"
dependencies = [
"futures-core",
"pin-project-lite",
"pin-project-lite 0.2.9",
"tokio",
]
@ -1938,14 +2353,15 @@ dependencies = [
[[package]]
name = "tokio-util"
version = "0.7.2"
version = "0.7.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f988a1a1adc2fb21f9c12aa96441da33a1728193ae0b95d2be22dbd17fcb4e5c"
checksum = "cc463cd8deddc3770d20f9852143d50bf6094e640b485cb2e189a2099085ff45"
dependencies = [
"bytes",
"futures-core",
"futures-io",
"futures-sink",
"pin-project-lite",
"pin-project-lite 0.2.9",
"tokio",
"tracing",
]
@ -1970,7 +2386,7 @@ dependencies = [
"hdrhistogram",
"indexmap",
"pin-project",
"pin-project-lite",
"pin-project-lite 0.2.9",
"rand",
"slab",
"tokio",
@ -1994,13 +2410,13 @@ checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
[[package]]
name = "tracing"
version = "0.1.34"
version = "0.1.35"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5d0ecdcb44a79f0fe9844f0c4f33a342cbcbb5117de8001e6ba0dc2351327d09"
checksum = "a400e31aa60b9d44a52a8ee0343b5b18566b03a8321e0d321f695cf56e940160"
dependencies = [
"cfg-if",
"log",
"pin-project-lite",
"pin-project-lite 0.2.9",
"tracing-attributes",
"tracing-core",
]
@ -2018,11 +2434,11 @@ dependencies = [
[[package]]
name = "tracing-core"
version = "0.1.26"
version = "0.1.27"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f54c8ca710e81886d498c2fd3331b56c93aa248d49de2222ad2742247c60072f"
checksum = "7709595b8878a4965ce5e87ebf880a7d39c9afc6837721b21a5a816a8117d921"
dependencies = [
"lazy_static",
"once_cell",
"valuable",
]
@ -2081,9 +2497,9 @@ checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"
[[package]]
name = "unicode-ident"
version = "1.0.0"
version = "1.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d22af068fba1eb5edcb4aea19d382b2a3deb4c8f9d475c589b6ada9e0fd493ee"
checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c"
[[package]]
name = "unicode-normalization"
@ -2118,6 +2534,16 @@ version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
[[package]]
name = "value-bag"
version = "1.0.0-alpha.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2209b78d1249f7e6f3293657c9779fe31ced465df091bbd433a1cf88e916ec55"
dependencies = [
"ctor",
"version_check",
]
[[package]]
name = "vcpkg"
version = "0.2.15"
@ -2130,6 +2556,12 @@ version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
[[package]]
name = "waker-fn"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
[[package]]
name = "walkdir"
version = "2.3.2"
@ -2153,9 +2585,9 @@ dependencies = [
[[package]]
name = "wasi"
version = "0.10.2+wasi-snapshot-preview1"
version = "0.10.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
[[package]]
name = "wasi"
@ -2163,6 +2595,91 @@ version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]]
name = "wasm-bindgen"
version = "0.2.81"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7c53b543413a17a202f4be280a7e5c62a1c69345f5de525ee64f8cfdbc954994"
dependencies = [
"cfg-if",
"wasm-bindgen-macro",
]
[[package]]
name = "wasm-bindgen-backend"
version = "0.2.81"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5491a68ab4500fa6b4d726bd67408630c3dbe9c4fe7bda16d5c82a1fd8c7340a"
dependencies = [
"bumpalo",
"lazy_static",
"log",
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-shared",
]
[[package]]
name = "wasm-bindgen-futures"
version = "0.4.31"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "de9a9cec1733468a8c657e57fa2413d2ae2c0129b95e87c5b72b8ace4d13f31f"
dependencies = [
"cfg-if",
"js-sys",
"wasm-bindgen",
"web-sys",
]
[[package]]
name = "wasm-bindgen-macro"
version = "0.2.81"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c441e177922bc58f1e12c022624b6216378e5febc2f0533e41ba443d505b80aa"
dependencies = [
"quote",
"wasm-bindgen-macro-support",
]
[[package]]
name = "wasm-bindgen-macro-support"
version = "0.2.81"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7d94ac45fcf608c1f45ef53e748d35660f168490c10b23704c7779ab8f5c3048"
dependencies = [
"proc-macro2",
"quote",
"syn",
"wasm-bindgen-backend",
"wasm-bindgen-shared",
]
[[package]]
name = "wasm-bindgen-shared"
version = "0.2.81"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6a89911bd99e5f3659ec4acf9c4d93b0a90fe4a2a11f15328472058edc5261be"
[[package]]
name = "web-sys"
version = "0.3.58"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2fed94beee57daf8dd7d51f2b15dc2bcde92d7a72304cdf662a4371008b71b90"
dependencies = [
"js-sys",
"wasm-bindgen",
]
[[package]]
name = "wepoll-ffi"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d743fdedc5c64377b5fc2bc036b01c7fd642205a0d96356034ae3404d49eb7fb"
dependencies = [
"cc",
]
[[package]]
name = "winapi"
version = "0.3.9"

19
Cargo.toml
Unescape Escape View File

@ -12,9 +12,12 @@ argon2 = "0.3"
async-trait = "0.1"
base64 = "0.13"
clap = { version = "3.1.18", features = ["derive", "env"] }
duplexify = "1.1.0"
hex = "0.4"
futures = "0.3"
im = "15"
itertools = "0.10"
lazy_static = "1.4"
ldap3 = { version = "0.10", default-features = false, features = ["tls"] }
log = "0.4"
pretty_env_logger = "0.4"
@ -27,25 +30,19 @@ rand = "0.8.5"
rmp-serde = "0.15"
rpassword = "6.0"
sodiumoxide = "0.2"
tokio = "1.17.0"
tokio = { version = "1.18", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
tokio-util = { version = "0.7", features = [ "compat" ] }
toml = "0.5"
zstd = { version = "0.9", default-features = false }
tracing-subscriber = "0.3"
tracing = "0.1"
tower = "0.4"
futures = "0.3"
imap-codec = "0.5"
k2v-client = { git = "https://git.deuxfleurs.fr/Deuxfleurs/garage.git", branch = "main" }
boitalettres = { git = "https://git.deuxfleurs.fr/KokaKiwi/boitalettres.git", branch = "main" }
#k2v-client = { path = "../garage/src/k2v-client" }
[[bin]]
name = "test"
path = "src/test.rs"
smtp-message = { git = "http://github.com/Alexis211/kannader", branch = "feature/lmtp" }
smtp-server = { git = "http://github.com/Alexis211/kannader", branch = "feature/lmtp" }
[[bin]]
name = "main"
path = "src/main.rs"
#k2v-client = { path = "../garage/src/k2v-client" }

3
rust-toolchain.toml
Unescape Escape View File

@ -0,0 +1,3 @@
[toolchain]
channel = "nightly-2022-06-14"
components = ["rustc-dev", "rust-src"]

BIN
src/.server.rs.swo
View File

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BIN
src/.service.rs.swo
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BIN
src/.session.rs.swo
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38
src/bayou.rs
Unescape Escape View File

@ -1,3 +1,4 @@
use std::str::FromStr;
use std::time::{Duration, Instant};
use anyhow::{anyhow, bail, Result};
@ -123,7 +124,7 @@ impl<S: BayouState> Bayou<S> {
.collect();
// 3. List all operations starting from checkpoint
let ts_ser = self.checkpoint.0.serialize();
let ts_ser = self.checkpoint.0.to_string();
debug!("(sync) looking up operations starting at {}", ts_ser);
let ops_map = self
.k2v
@ -148,8 +149,9 @@ impl<S: BayouState> Bayou<S> {
let mut ops = vec![];
for (tsstr, val) in ops_map {
let ts = Timestamp::parse(&tsstr)
.ok_or(anyhow!("Invalid operation timestamp: {}", tsstr))?;
let ts = tsstr
.parse::<Timestamp>()
.map_err(|_| anyhow!("Invalid operation timestamp: {}", tsstr))?;
if val.value.len() != 1 {
bail!("Invalid operation, has {} values", val.value.len());
}
@ -251,7 +253,7 @@ impl<S: BayouState> Bayou<S> {
self.k2v
.insert_item(
&self.path,
&ts.serialize(),
&ts.to_string(),
seal_serialize(&op, &self.key)?,
None,
)
@ -316,7 +318,7 @@ impl<S: BayouState> Bayou<S> {
let ts_cp = self.history[i_cp].0;
debug!(
"(cp) we could checkpoint at time {} (index {} in history)",
ts_cp.serialize(),
ts_cp.to_string(),
i_cp
);
@ -330,13 +332,13 @@ impl<S: BayouState> Bayou<S> {
{
debug!(
"(cp) last checkpoint is too recent: {}, not checkpointing",
last_cp.0.serialize()
last_cp.0.to_string()
);
return Ok(());
}
}
debug!("(cp) saving checkpoint at {}", ts_cp.serialize());
debug!("(cp) saving checkpoint at {}", ts_cp.to_string());
// Calculate state at time of checkpoint
let mut last_known_state = (0, &self.checkpoint.1);
@ -356,7 +358,7 @@ impl<S: BayouState> Bayou<S> {
let mut por = PutObjectRequest::default();
por.bucket = self.bucket.clone();
por.key = format!("{}/checkpoint/{}", self.path, ts_cp.serialize());
por.key = format!("{}/checkpoint/{}", self.path, ts_cp.to_string());
por.body = Some(cryptoblob.into());
self.s3.put_object(por).await?;
@ -375,7 +377,7 @@ impl<S: BayouState> Bayou<S> {
}
// Delete corresponding range of operations
let ts_ser = existing_checkpoints[last_to_keep].0.serialize();
let ts_ser = existing_checkpoints[last_to_keep].0.to_string();
self.k2v
.delete_batch(&[BatchDeleteOp {
partition_key: &self.path,
@ -414,7 +416,7 @@ impl<S: BayouState> Bayou<S> {
for object in checkpoints_res.contents.unwrap_or_default() {
if let Some(key) = object.key {
if let Some(ckid) = key.strip_prefix(&prefix) {
if let Some(ts) = Timestamp::parse(ckid) {
if let Ok(ts) = ckid.parse::<Timestamp>() {
checkpoints.push((ts, key));
}
}
@ -451,20 +453,26 @@ impl Timestamp {
pub fn zero() -> Self {
Self { msec: 0, rand: 0 }
}
}
pub fn serialize(&self) -> String {
impl ToString for Timestamp {
fn to_string(&self) -> String {
let mut bytes = [0u8; 16];
bytes[0..8].copy_from_slice(&u64::to_be_bytes(self.msec));
bytes[8..16].copy_from_slice(&u64::to_be_bytes(self.rand));
hex::encode(&bytes)
}
}
pub fn parse(v: &str) -> Option<Self> {
let bytes = hex::decode(v).ok()?;
impl FromStr for Timestamp {
type Err = &'static str;
fn from_str(s: &str) -> Result<Timestamp, &'static str> {
let bytes = hex::decode(s).map_err(|_| "invalid hex")?;
if bytes.len() != 16 {
return None;
return Err("bad length");
}
Some(Self {
Ok(Self {
msec: u64::from_be_bytes(bytes[0..8].try_into().unwrap()),
rand: u64::from_be_bytes(bytes[8..16].try_into().unwrap()),
})

3
src/command.rs
Unescape Escape View File

@ -8,7 +8,6 @@ use imap_codec::types::response::{Capability, Data};
use imap_codec::types::sequence::SequenceSet;
use crate::mailbox::Mailbox;
use crate::mailstore::Mailstore;
use crate::session;
pub struct Command<'a> {
@ -33,7 +32,7 @@ impl<'a> Command<'a> {
let (u, p) = (String::try_from(username)?, String::try_from(password)?);
tracing::info!(user = %u, "command.login");
let creds = match self.session.mailstore.login_provider.login(&u, &p).await {
let creds = match self.session.login_provider.login(&u, &p).await {
Err(_) => {
return Ok(Response::no(
"[AUTHENTICATIONFAILED] Authentication failed.",

11
src/config.rs
Unescape Escape View File

@ -1,5 +1,6 @@
use std::collections::HashMap;
use std::io::Read;
use std::net::SocketAddr;
use std::path::PathBuf;
use anyhow::Result;
@ -13,6 +14,8 @@ pub struct Config {
pub login_static: Option<LoginStaticConfig>,
pub login_ldap: Option<LoginLdapConfig>,
pub lmtp: Option<LmtpConfig>,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
@ -23,6 +26,8 @@ pub struct LoginStaticConfig {
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct LoginStaticUser {
#[serde(default)]
pub email_addresses: Vec<String>,
pub password: String,
pub aws_access_key_id: String,
@ -60,6 +65,12 @@ pub struct LoginLdapConfig {
pub bucket_attr: Option<String>,
}
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct LmtpConfig {
pub bind_addr: SocketAddr,
pub hostname: String,
}
pub fn read_config(config_file: PathBuf) -> Result<Config> {
let mut file = std::fs::OpenOptions::new()
.read(true)

263
src/lmtp.rs
Unescape Escape View File

@ -0,0 +1,263 @@
use std::collections::HashMap;
use std::net::SocketAddr;
use std::{pin::Pin, sync::Arc};
use anyhow::{bail, Result};
use async_trait::async_trait;
use duplexify::Duplex;
use futures::{io, AsyncRead, AsyncReadExt, AsyncWrite};
use futures::{stream, stream::FuturesUnordered, StreamExt};
use log::*;
use rusoto_s3::{PutObjectRequest, S3Client, S3};
use tokio::net::{TcpListener, TcpStream};
use tokio::select;
use tokio::sync::watch;
use tokio_util::compat::*;
use smtp_message::{Email, EscapedDataReader, Reply, ReplyCode};
use smtp_server::{reply, Config, ConnectionMetadata, Decision, MailMetadata, Protocol};
use crate::config::*;
use crate::cryptoblob::*;
use crate::login::*;
use crate::mail_ident::*;
pub struct LmtpServer {
bind_addr: SocketAddr,
hostname: String,
login_provider: Arc<dyn LoginProvider + Send + Sync>,
}
impl LmtpServer {
pub fn new(
config: LmtpConfig,
login_provider: Arc<dyn LoginProvider + Send + Sync>,
) -> Arc<Self> {
Arc::new(Self {
bind_addr: config.bind_addr,
hostname: config.hostname,
login_provider,
})
}
pub async fn run(self: &Arc<Self>, mut must_exit: watch::Receiver<bool>) -> Result<()> {
let tcp = TcpListener::bind(self.bind_addr).await?;
let mut connections = FuturesUnordered::new();
while !*must_exit.borrow() {
let wait_conn_finished = async {
if connections.is_empty() {
futures::future::pending().await
} else {
connections.next().await
}
};
let (socket, remote_addr) = select! {
a = tcp.accept() => a?,
_ = wait_conn_finished => continue,
_ = must_exit.changed() => continue,
};
let conn = tokio::spawn(smtp_server::interact(
socket.compat(),
smtp_server::IsAlreadyTls::No,
Conn { remote_addr },
self.clone(),
));
connections.push(conn);
}
drop(tcp);
info!("LMTP server shutting down, draining remaining connections...");
while connections.next().await.is_some() {}
Ok(())
}
}
// ----
pub struct Conn {
remote_addr: SocketAddr,
}
pub struct Message {
to: Vec<PublicCredentials>,
}
#[async_trait]
impl Config for LmtpServer {
const PROTOCOL: Protocol = Protocol::Lmtp;
type ConnectionUserMeta = Conn;
type MailUserMeta = Message;
fn hostname(&self, _conn_meta: &ConnectionMetadata<Conn>) -> &str {
&self.hostname
}
async fn new_mail(&self, _conn_meta: &mut ConnectionMetadata<Conn>) -> Message {
Message { to: vec![] }
}
async fn tls_accept<IO>(
&self,
_io: IO,
_conn_meta: &mut ConnectionMetadata<Conn>,
) -> io::Result<Duplex<Pin<Box<dyn Send + AsyncRead>>, Pin<Box<dyn Send + AsyncWrite>>>>
where
IO: Send + AsyncRead + AsyncWrite,
{
Err(io::Error::new(
io::ErrorKind::InvalidInput,
"TLS not implemented for LMTP server",
))
}
async fn filter_from(
&self,
from: Option<Email>,
meta: &mut MailMetadata<Message>,
_conn_meta: &mut ConnectionMetadata<Conn>,
) -> Decision<Option<Email>> {
Decision::Accept {
reply: reply::okay_from().convert(),
res: from,
}
}
async fn filter_to(
&self,
to: Email,
meta: &mut MailMetadata<Message>,
_conn_meta: &mut ConnectionMetadata<Conn>,
) -> Decision<Email> {
let to_str = match to.hostname.as_ref() {
Some(h) => format!("{}@{}", to.localpart, h),
None => to.localpart.to_string(),
};
match self.login_provider.public_login(&to_str).await {
Ok(creds) => {
meta.user.to.push(creds);
Decision::Accept {
reply: reply::okay_to().convert(),
res: to,
}
}
Err(e) => Decision::Reject {
reply: Reply {
code: ReplyCode::POLICY_REASON,
ecode: None,
text: vec![smtp_message::MaybeUtf8::Utf8(e.to_string())],
},
},
}
}
async fn handle_mail<'a, R>(
&self,
reader: &mut EscapedDataReader<'a, R>,
_mail: MailMetadata<Message>,
_conn_meta: &mut ConnectionMetadata<Conn>,
) -> Decision<()>
where
R: Send + Unpin + AsyncRead,
{
unreachable!();
}
async fn handle_mail_multi<'a, 'slife0, 'slife1, 'stream, R>(
&'slife0 self,
reader: &mut EscapedDataReader<'a, R>,
meta: MailMetadata<Message>,
conn_meta: &'slife1 mut ConnectionMetadata<Conn>,
) -> Pin<Box<dyn futures::Stream<Item = Decision<()>> + Send + 'stream>>
where
R: Send + Unpin + AsyncRead,
'slife0: 'stream,
'slife1: 'stream,
Self: 'stream,
{
let err_response_stream = |meta: MailMetadata<Message>, msg: String| {
Box::pin(
stream::iter(meta.user.to.into_iter()).map(move |_| Decision::Reject {
reply: Reply {
code: ReplyCode::POLICY_REASON,
ecode: None,
text: vec![smtp_message::MaybeUtf8::Utf8(msg.clone())],
},
}),
)
};
let mut text = Vec::new();
if reader.read_to_end(&mut text).await.is_err() {
return err_response_stream(meta, "io error".into());
}
reader.complete();
let encrypted_message = match EncryptedMessage::new(text) {
Ok(x) => Arc::new(x),
Err(e) => return err_response_stream(meta, e.to_string()),
};
Box::pin(stream::iter(meta.user.to.into_iter()).then(move |creds| {
let encrypted_message = encrypted_message.clone();
async move {
match encrypted_message.deliver_to(creds).await {
Ok(()) => Decision::Accept {
reply: reply::okay_mail().convert(),
res: (),
},
Err(e) => Decision::Reject {
reply: Reply {
code: ReplyCode::POLICY_REASON,
ecode: None,
text: vec![smtp_message::MaybeUtf8::Utf8(e.to_string())],
},
},
}
}
}))
}
}
// ----
struct EncryptedMessage {
key: Key,
encrypted_body: Vec<u8>,
}