361 lines
11 KiB
Rust
361 lines
11 KiB
Rust
use std::str::FromStr;
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use chrono::{DateTime, Local};
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use percent_encoding::{percent_encode, NON_ALPHANUMERIC};
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use lettre::{
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message::{header, Mailbox, Message, MultiPart, SinglePart},
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transport::smtp::authentication::{Credentials, Mechanism as SmtpAuthMechanism},
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transport::smtp::client::{Tls, TlsParameters},
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transport::smtp::extension::ClientId,
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Address, SmtpTransport, Transport,
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};
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use crate::{
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api::EmptyResult,
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auth::{encode_jwt, generate_delete_claims, generate_invite_claims, generate_verify_email_claims},
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error::Error,
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CONFIG,
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};
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fn mailer() -> SmtpTransport {
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use std::time::Duration;
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let host = CONFIG.smtp_host().unwrap();
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let smtp_client = SmtpTransport::builder_dangerous(host.as_str())
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.port(CONFIG.smtp_port())
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.timeout(Some(Duration::from_secs(CONFIG.smtp_timeout())));
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// Determine security
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let smtp_client = if CONFIG.smtp_ssl() {
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let mut tls_parameters = TlsParameters::builder(host);
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if CONFIG.smtp_accept_invalid_hostnames() {
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tls_parameters = tls_parameters.dangerous_accept_invalid_hostnames(true);
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}
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if CONFIG.smtp_accept_invalid_certs() {
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tls_parameters = tls_parameters.dangerous_accept_invalid_certs(true);
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}
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let tls_parameters = tls_parameters.build().unwrap();
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if CONFIG.smtp_explicit_tls() {
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smtp_client.tls(Tls::Wrapper(tls_parameters))
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} else {
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smtp_client.tls(Tls::Required(tls_parameters))
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}
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} else {
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smtp_client
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};
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let smtp_client = match (CONFIG.smtp_username(), CONFIG.smtp_password()) {
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(Some(user), Some(pass)) => smtp_client.credentials(Credentials::new(user, pass)),
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_ => smtp_client,
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};
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let smtp_client = match CONFIG.helo_name() {
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Some(helo_name) => smtp_client.hello_name(ClientId::Domain(helo_name)),
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None => smtp_client,
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};
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let smtp_client = match CONFIG.smtp_auth_mechanism() {
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Some(mechanism) => {
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let allowed_mechanisms = [
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SmtpAuthMechanism::Plain,
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SmtpAuthMechanism::Login,
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SmtpAuthMechanism::Xoauth2,
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];
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let mut selected_mechanisms = vec![];
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for wanted_mechanism in mechanism.split(',') {
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for m in &allowed_mechanisms {
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if m.to_string().to_lowercase()
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== wanted_mechanism
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.trim_matches(|c| c == '"' || c == '\'' || c == ' ')
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.to_lowercase()
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{
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selected_mechanisms.push(*m);
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}
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}
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}
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if !selected_mechanisms.is_empty() {
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smtp_client.authentication(selected_mechanisms)
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} else {
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// Only show a warning, and return without setting an actual authentication mechanism
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warn!(
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"No valid SMTP Auth mechanism found for '{}', using default values",
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mechanism
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);
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smtp_client
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}
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}
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_ => smtp_client,
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};
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smtp_client.build()
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}
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fn get_text(template_name: &'static str, data: serde_json::Value) -> Result<(String, String, String), Error> {
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let (subject_html, body_html) = get_template(&format!("{}.html", template_name), &data)?;
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let (_subject_text, body_text) = get_template(template_name, &data)?;
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Ok((subject_html, body_html, body_text))
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}
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fn get_template(template_name: &str, data: &serde_json::Value) -> Result<(String, String), Error> {
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let text = CONFIG.render_template(template_name, data)?;
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let mut text_split = text.split("<!---------------->");
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let subject = match text_split.next() {
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Some(s) => s.trim().to_string(),
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None => err!("Template doesn't contain subject"),
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};
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use newline_converter::unix2dos;
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let body = match text_split.next() {
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Some(s) => unix2dos(s.trim()).to_string(),
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None => err!("Template doesn't contain body"),
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};
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Ok((subject, body))
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}
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pub fn send_password_hint(address: &str, hint: Option<String>) -> EmptyResult {
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let template_name = if hint.is_some() {
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"email/pw_hint_some"
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} else {
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"email/pw_hint_none"
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};
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let (subject, body_html, body_text) = get_text(template_name, json!({ "hint": hint, "url": CONFIG.domain() }))?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_delete_account(address: &str, uuid: &str) -> EmptyResult {
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let claims = generate_delete_claims(uuid.to_string());
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let delete_token = encode_jwt(&claims);
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let (subject, body_html, body_text) = get_text(
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"email/delete_account",
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json!({
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"url": CONFIG.domain(),
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"user_id": uuid,
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"email": percent_encode(address.as_bytes(), NON_ALPHANUMERIC).to_string(),
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"token": delete_token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_verify_email(address: &str, uuid: &str) -> EmptyResult {
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let claims = generate_verify_email_claims(uuid.to_string());
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let verify_email_token = encode_jwt(&claims);
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let (subject, body_html, body_text) = get_text(
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"email/verify_email",
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json!({
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"url": CONFIG.domain(),
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"user_id": uuid,
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"email": percent_encode(address.as_bytes(), NON_ALPHANUMERIC).to_string(),
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"token": verify_email_token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_welcome(address: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/welcome",
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json!({
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"url": CONFIG.domain(),
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_welcome_must_verify(address: &str, uuid: &str) -> EmptyResult {
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let claims = generate_verify_email_claims(uuid.to_string());
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let verify_email_token = encode_jwt(&claims);
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let (subject, body_html, body_text) = get_text(
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"email/welcome_must_verify",
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json!({
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"url": CONFIG.domain(),
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"user_id": uuid,
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"token": verify_email_token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_invite(
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address: &str,
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uuid: &str,
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org_id: Option<String>,
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org_user_id: Option<String>,
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org_name: &str,
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invited_by_email: Option<String>,
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) -> EmptyResult {
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let claims = generate_invite_claims(
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uuid.to_string(),
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String::from(address),
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org_id.clone(),
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org_user_id.clone(),
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invited_by_email,
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);
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let invite_token = encode_jwt(&claims);
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let (subject, body_html, body_text) = get_text(
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"email/send_org_invite",
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json!({
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"url": CONFIG.domain(),
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"org_id": org_id.as_deref().unwrap_or("_"),
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"org_user_id": org_user_id.as_deref().unwrap_or("_"),
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"email": percent_encode(address.as_bytes(), NON_ALPHANUMERIC).to_string(),
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"org_name": org_name,
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"token": invite_token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_invite_accepted(new_user_email: &str, address: &str, org_name: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/invite_accepted",
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json!({
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"url": CONFIG.domain(),
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"email": new_user_email,
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"org_name": org_name,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_invite_confirmed(address: &str, org_name: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/invite_confirmed",
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json!({
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"url": CONFIG.domain(),
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"org_name": org_name,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_new_device_logged_in(address: &str, ip: &str, dt: &DateTime<Local>, device: &str) -> EmptyResult {
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use crate::util::upcase_first;
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let device = upcase_first(device);
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let fmt = "%A, %B %_d, %Y at %r %Z";
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let (subject, body_html, body_text) = get_text(
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"email/new_device_logged_in",
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json!({
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"url": CONFIG.domain(),
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"ip": ip,
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"device": device,
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"datetime": crate::util::format_datetime_local(dt, fmt),
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_token(address: &str, token: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/twofactor_email",
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json!({
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"url": CONFIG.domain(),
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"token": token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_change_email(address: &str, token: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/change_email",
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json!({
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"url": CONFIG.domain(),
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"token": token,
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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pub fn send_test(address: &str) -> EmptyResult {
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let (subject, body_html, body_text) = get_text(
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"email/smtp_test",
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json!({
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"url": CONFIG.domain(),
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}),
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)?;
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send_email(address, &subject, body_html, body_text)
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}
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fn send_email(address: &str, subject: &str, body_html: String, body_text: String) -> EmptyResult {
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let address_split: Vec<&str> = address.rsplitn(2, '@').collect();
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if address_split.len() != 2 {
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err!("Invalid email address (no @)");
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}
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let domain_puny = match idna::domain_to_ascii_strict(address_split[0]) {
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Ok(d) => d,
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Err(_) => err!("Can't convert email domain to ASCII representation"),
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};
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let address = format!("{}@{}", address_split[1], domain_puny);
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let html = SinglePart::builder()
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// We force Base64 encoding because in the past we had issues with different encodings.
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.header(header::ContentTransferEncoding::Base64)
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.header(header::ContentType("text/html; charset=utf-8".parse()?))
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.body(body_html);
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let text = SinglePart::builder()
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// We force Base64 encoding because in the past we had issues with different encodings.
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.header(header::ContentTransferEncoding::Base64)
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.header(header::ContentType("text/plain; charset=utf-8".parse()?))
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.body(body_text);
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let smtp_from = &CONFIG.smtp_from();
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let email = Message::builder()
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.message_id(Some(format!(
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"<{}@{}>",
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crate::util::get_uuid(),
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smtp_from.split('@').collect::<Vec<&str>>()[1]
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)))
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.to(Mailbox::new(None, Address::from_str(&address)?))
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.from(Mailbox::new(
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Some(CONFIG.smtp_from_name()),
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Address::from_str(smtp_from)?,
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))
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.subject(subject)
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.multipart(MultiPart::alternative().singlepart(text).singlepart(html))?;
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match mailer().send(&email) {
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Ok(_) => Ok(()),
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// Match some common errors and make them more user friendly
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Err(e) => {
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if e.is_client() {
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err!(format!("SMTP Client error: {}", e));
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} else if e.is_transient() {
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err!(format!("SMTP 4xx error: {:?}", e));
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} else if e.is_permanent() {
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err!(format!("SMTP 5xx error: {:?}", e));
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} else if e.is_timeout() {
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err!(format!("SMTP timeout error: {:?}", e));
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} else {
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Err(e.into())
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}
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}
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}
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}
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