| <!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `/root/.cargo/git/checkouts/incubator-teaclave-crates-c8106113f74feefc/ede1f68/rustls-0.19.1/rustls/src/client/hs.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>hs.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" href="../../../normalize.css"><link rel="stylesheet" href="../../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" href="../../../ayu.css" disabled><link rel="stylesheet" href="../../../dark.css" disabled><link rel="stylesheet" href="../../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../../storage.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script><script defer src="../../../main.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><a class="sidebar-logo" href="../../../rustls/index.html"><div class="logo-container"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></div></a></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../../rustls/index.html"><img class="rust-logo" src="../../../rust-logo.svg" alt="logo"></a><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../../wheel.svg"></a></div></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><span id="1">1</span> |
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| </pre><pre class="rust"><code><span class="attribute">#[cfg(feature = <span class="string">"logging"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::bs_debug; |
| <span class="kw">use </span><span class="kw">crate</span>::check::check_message; |
| <span class="kw">use </span><span class="kw">crate</span>::cipher; |
| <span class="kw">use </span><span class="kw">crate</span>::client::ClientSessionImpl; |
| <span class="kw">use </span><span class="kw">crate</span>::error::TLSError; |
| <span class="kw">use </span><span class="kw">crate</span>::key_schedule::{KeyScheduleEarly, KeyScheduleHandshake}; |
| <span class="attribute">#[cfg(feature = <span class="string">"logging"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::log::{debug, trace}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::base::Payload; |
| <span class="attribute">#[cfg(feature = <span class="string">"quic"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::msgs::base::PayloadU16; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::codec::{Codec, Reader}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{AlertDescription, Compression, ProtocolVersion}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{ContentType, ExtensionType, HandshakeType}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{ECPointFormat, PSKKeyExchangeMode}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::HelloRetryRequest; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{CertificateStatusRequest, SCTList}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{ClientExtension, HasServerExtensions}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{ClientHelloPayload, HandshakeMessagePayload, HandshakePayload}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{ConvertProtocolNameList, ProtocolNameList}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{ECPointFormatList, SupportedPointFormats}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{Random, SessionID}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::message::{Message, MessagePayload}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::persist; |
| <span class="kw">use </span><span class="kw">crate</span>::rand; |
| <span class="kw">use </span><span class="kw">crate</span>::session::SessionSecrets; |
| <span class="kw">use </span><span class="kw">crate</span>::suites; |
| <span class="kw">use </span><span class="kw">crate</span>::ticketer; |
| <span class="kw">use </span><span class="kw">crate</span>::verify; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::client::common::{ClientHelloDetails, ReceivedTicketDetails}; |
| <span class="kw">use </span><span class="kw">crate</span>::client::common::{HandshakeDetails, ServerCertDetails}; |
| <span class="kw">use </span><span class="kw">crate</span>::client::{tls12, tls13}; |
| |
| <span class="kw">use </span>webpki; |
| |
| <span class="kw">pub type </span>NextState = Box<<span class="kw">dyn </span>State + Send + Sync>; |
| <span class="kw">pub type </span>NextStateOrError = <span class="prelude-ty">Result</span><NextState, TLSError>; |
| |
| <span class="kw">pub trait </span>State { |
| <span class="doccomment">/// Each handle() implementation consumes a whole TLS message, and returns |
| /// either an error or the next state. |
| </span><span class="kw">fn </span>handle(<span class="self">self</span>: Box<<span class="self">Self</span>>, sess: <span class="kw-2">&mut </span>ClientSessionImpl, m: Message) -> NextStateOrError; |
| |
| <span class="kw">fn </span>export_keying_material( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| _output: <span class="kw-2">&mut </span>[u8], |
| _label: <span class="kw-2">&</span>[u8], |
| _context: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[u8]>, |
| ) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="prelude-val">Err</span>(TLSError::HandshakeNotComplete) |
| } |
| |
| <span class="kw">fn </span>perhaps_write_key_update(<span class="kw-2">&mut </span><span class="self">self</span>, _sess: <span class="kw-2">&mut </span>ClientSessionImpl) {} |
| } |
| |
| <span class="kw">pub fn </span>illegal_param(sess: <span class="kw-2">&mut </span>ClientSessionImpl, why: <span class="kw-2">&</span>str) -> TLSError { |
| sess.common |
| .send_fatal_alert(AlertDescription::IllegalParameter); |
| TLSError::PeerMisbehavedError(why.to_string()) |
| } |
| |
| <span class="kw">pub fn </span>check_aligned_handshake(sess: <span class="kw-2">&mut </span>ClientSessionImpl) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="kw">if </span>!sess.common.handshake_joiner.is_empty() { |
| sess.common |
| .send_fatal_alert(AlertDescription::UnexpectedMessage); |
| <span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"key epoch or handshake flight with pending fragment"</span>.to_string(), |
| )) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">fn </span>find_session( |
| sess: <span class="kw-2">&mut </span>ClientSessionImpl, |
| dns_name: webpki::DNSNameRef, |
| ) -> <span class="prelude-ty">Option</span><persist::ClientSessionValue> { |
| <span class="kw">let </span>key = persist::ClientSessionKey::session_for_dns_name(dns_name); |
| <span class="kw">let </span>key_buf = key.get_encoding(); |
| |
| <span class="kw">let </span>maybe_value = sess |
| .config |
| .session_persistence |
| .get(<span class="kw-2">&</span>key_buf); |
| |
| <span class="kw">if </span>maybe_value.is_none() { |
| <span class="macro">debug!</span>(<span class="string">"No cached session for {:?}"</span>, dns_name); |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="kw">let </span>value = maybe_value.unwrap(); |
| <span class="kw">let </span><span class="kw-2">mut </span>reader = Reader::init(<span class="kw-2">&</span>value[..]); |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(result) = persist::ClientSessionValue::read(<span class="kw-2">&mut </span>reader) { |
| <span class="kw">if </span>result.has_expired(ticketer::timebase()) { |
| <span class="prelude-val">None |
| </span>} <span class="kw">else </span>{ |
| <span class="attribute">#[cfg(feature = <span class="string">"quic"</span>)] |
| </span>{ |
| <span class="kw">if </span>sess.common.is_quic() { |
| <span class="kw">let </span>params = PayloadU16::read(<span class="kw-2">&mut </span>reader)<span class="question-mark">?</span>; |
| sess.common.quic.params = <span class="prelude-val">Some</span>(params.<span class="number">0</span>); |
| } |
| } |
| <span class="prelude-val">Some</span>(result) |
| } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">fn </span>random_sessionid() -> SessionID { |
| <span class="kw">let </span><span class="kw-2">mut </span>random_id = [<span class="number">0u8</span>; <span class="number">32</span>]; |
| rand::fill_random(<span class="kw-2">&mut </span>random_id); |
| SessionID::new(<span class="kw-2">&</span>random_id) |
| } |
| |
| <span class="doccomment">/// If we have a ticket, we use the sessionid as a signal that we're |
| /// doing an abbreviated handshake. See section 3.4 in RFC5077. |
| </span><span class="kw">fn </span>random_sessionid_for_ticket(csv: <span class="kw-2">&mut </span>persist::ClientSessionValue) { |
| <span class="kw">if </span>!csv.ticket.<span class="number">0</span>.is_empty() { |
| csv.session_id = random_sessionid(); |
| } |
| } |
| |
| <span class="kw">struct </span>InitialState { |
| handshake: HandshakeDetails, |
| } |
| |
| <span class="kw">impl </span>InitialState { |
| <span class="kw">fn </span>new(host_name: webpki::DNSName, extra_exts: Vec<ClientExtension>) -> InitialState { |
| InitialState { |
| handshake: HandshakeDetails::new(host_name, extra_exts), |
| } |
| } |
| |
| <span class="kw">fn </span>emit_initial_client_hello(<span class="kw-2">mut </span><span class="self">self</span>, sess: <span class="kw-2">&mut </span>ClientSessionImpl) -> NextState { |
| <span class="kw">if </span>sess |
| .config |
| .client_auth_cert_resolver |
| .has_certs() |
| { |
| <span class="self">self</span>.handshake |
| .transcript |
| .set_client_auth_enabled(); |
| } |
| <span class="kw">let </span>hello_details = ClientHelloDetails::new(); |
| emit_client_hello_for_retry(sess, <span class="self">self</span>.handshake, hello_details, <span class="prelude-val">None</span>) |
| } |
| } |
| |
| <span class="kw">pub fn </span>start_handshake( |
| sess: <span class="kw-2">&mut </span>ClientSessionImpl, |
| host_name: webpki::DNSName, |
| extra_exts: Vec<ClientExtension>, |
| ) -> NextState { |
| InitialState::new(host_name, extra_exts).emit_initial_client_hello(sess) |
| } |
| |
| <span class="kw">struct </span>ExpectServerHello { |
| handshake: HandshakeDetails, |
| early_key_schedule: <span class="prelude-ty">Option</span><KeyScheduleEarly>, |
| hello: ClientHelloDetails, |
| server_cert: ServerCertDetails, |
| may_send_cert_status: bool, |
| must_issue_new_ticket: bool, |
| } |
| |
| <span class="kw">struct </span>ExpectServerHelloOrHelloRetryRequest(ExpectServerHello); |
| |
| <span class="kw">pub fn </span>compatible_suite( |
| sess: <span class="kw-2">&</span>ClientSessionImpl, |
| resuming_suite: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>suites::SupportedCipherSuite>, |
| ) -> bool { |
| <span class="kw">match </span>resuming_suite { |
| <span class="prelude-val">Some</span>(resuming_suite) => { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(suite) = sess.common.get_suite() { |
| suite.can_resume_to(<span class="kw-2">&</span>resuming_suite) |
| } <span class="kw">else </span>{ |
| <span class="bool-val">true |
| </span>} |
| } |
| <span class="prelude-val">None </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>emit_client_hello_for_retry( |
| sess: <span class="kw-2">&mut </span>ClientSessionImpl, |
| <span class="kw-2">mut </span>handshake: HandshakeDetails, |
| <span class="kw-2">mut </span>hello: ClientHelloDetails, |
| retryreq: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>HelloRetryRequest>, |
| ) -> NextState { |
| <span class="comment">// Do we have a SessionID or ticket cached for this host? |
| </span>handshake.resuming_session = find_session(sess, handshake.dns_name.as_ref()); |
| <span class="kw">let </span>(session_id, ticket, resume_version) = <span class="kw">if </span>handshake.resuming_session.is_some() { |
| <span class="kw">let </span>resuming = handshake |
| .resuming_session |
| .as_mut() |
| .unwrap(); |
| <span class="kw">if </span>resuming.version == ProtocolVersion::TLSv1_2 { |
| random_sessionid_for_ticket(resuming); |
| } |
| <span class="macro">debug!</span>(<span class="string">"Resuming session"</span>); |
| ( |
| resuming.session_id, |
| resuming.ticket.<span class="number">0</span>.clone(), |
| resuming.version, |
| ) |
| } <span class="kw">else </span>{ |
| <span class="macro">debug!</span>(<span class="string">"Not resuming any session"</span>); |
| <span class="kw">if </span>handshake.session_id.is_empty() && !sess.common.is_quic() { |
| handshake.session_id = random_sessionid(); |
| } |
| ( |
| handshake.session_id, |
| Vec::new(), |
| ProtocolVersion::Unknown(<span class="number">0</span>), |
| ) |
| }; |
| |
| <span class="kw">let </span>support_tls12 = sess |
| .config |
| .supports_version(ProtocolVersion::TLSv1_2); |
| <span class="kw">let </span>support_tls13 = sess |
| .config |
| .supports_version(ProtocolVersion::TLSv1_3); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>supported_versions = Vec::new(); |
| <span class="kw">if </span>support_tls13 { |
| supported_versions.push(ProtocolVersion::TLSv1_3); |
| } |
| |
| <span class="kw">if </span>support_tls12 { |
| supported_versions.push(ProtocolVersion::TLSv1_2); |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>exts = Vec::new(); |
| <span class="kw">if </span>!supported_versions.is_empty() { |
| exts.push(ClientExtension::SupportedVersions(supported_versions)); |
| } |
| <span class="kw">if </span>sess.config.enable_sni { |
| exts.push(ClientExtension::make_sni(handshake.dns_name.as_ref())); |
| } |
| exts.push(ClientExtension::ECPointFormats( |
| ECPointFormatList::supported(), |
| )); |
| exts.push(ClientExtension::NamedGroups( |
| suites::KeyExchange::supported_groups().to_vec(), |
| )); |
| exts.push(ClientExtension::SignatureAlgorithms( |
| sess.config |
| .get_verifier() |
| .supported_verify_schemes(), |
| )); |
| exts.push(ClientExtension::ExtendedMasterSecretRequest); |
| exts.push(ClientExtension::CertificateStatusRequest( |
| CertificateStatusRequest::build_ocsp(), |
| )); |
| |
| <span class="kw">if </span>sess.config.ct_logs.is_some() { |
| exts.push(ClientExtension::SignedCertificateTimestampRequest); |
| } |
| |
| <span class="kw">if </span>support_tls13 { |
| tls13::choose_kx_groups(sess, <span class="kw-2">&mut </span>exts, <span class="kw-2">&mut </span>hello, <span class="kw-2">&mut </span>handshake, retryreq); |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(cookie) = retryreq.and_then(HelloRetryRequest::get_cookie) { |
| exts.push(ClientExtension::Cookie(cookie.clone())); |
| } |
| |
| <span class="kw">if </span>support_tls13 && sess.config.enable_tickets { |
| <span class="comment">// We could support PSK_KE here too. Such connections don't |
| // have forward secrecy, and are similar to TLS1.2 resumption. |
| </span><span class="kw">let </span>psk_modes = <span class="macro">vec!</span>[PSKKeyExchangeMode::PSK_DHE_KE]; |
| exts.push(ClientExtension::PresharedKeyModes(psk_modes)); |
| } |
| |
| <span class="kw">if </span>!sess.config.alpn_protocols.is_empty() { |
| exts.push(ClientExtension::Protocols(ProtocolNameList::from_slices( |
| <span class="kw-2">&</span>sess |
| .config |
| .alpn_protocols |
| .iter() |
| .map(|proto| <span class="kw-2">&</span>proto[..]) |
| .collect::<Vec<<span class="kw">_</span>>>(), |
| ))); |
| } |
| |
| <span class="comment">// Extra extensions must be placed before the PSK extension |
| </span>exts.extend(handshake.extra_exts.iter().cloned()); |
| |
| <span class="kw">let </span>fill_in_binder = <span class="kw">if </span>support_tls13 |
| && sess.config.enable_tickets |
| && resume_version == ProtocolVersion::TLSv1_3 |
| && !ticket.is_empty() |
| { |
| tls13::prepare_resumption(sess, ticket, <span class="kw-2">&</span>handshake, <span class="kw-2">&mut </span>exts, retryreq.is_some()) |
| } <span class="kw">else if </span>sess.config.enable_tickets { |
| <span class="comment">// If we have a ticket, include it. Otherwise, request one. |
| </span><span class="kw">if </span>ticket.is_empty() { |
| exts.push(ClientExtension::SessionTicketRequest); |
| } <span class="kw">else </span>{ |
| exts.push(ClientExtension::SessionTicketOffer(Payload::new(ticket))); |
| } |
| <span class="bool-val">false |
| </span>} <span class="kw">else </span>{ |
| <span class="bool-val">false |
| </span>}; |
| |
| <span class="comment">// Note what extensions we sent. |
| </span>hello.sent_extensions = exts |
| .iter() |
| .map(ClientExtension::get_type) |
| .collect(); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>chp = HandshakeMessagePayload { |
| typ: HandshakeType::ClientHello, |
| payload: HandshakePayload::ClientHello(ClientHelloPayload { |
| client_version: ProtocolVersion::TLSv1_2, |
| random: Random::from_slice(<span class="kw-2">&</span>handshake.randoms.client), |
| session_id, |
| cipher_suites: sess.get_cipher_suites(), |
| compression_methods: <span class="macro">vec!</span>[Compression::Null], |
| extensions: exts, |
| }), |
| }; |
| |
| <span class="kw">let </span>early_key_schedule = <span class="kw">if </span>fill_in_binder { |
| <span class="prelude-val">Some</span>(tls13::fill_in_psk_binder(sess, <span class="kw-2">&mut </span>handshake, <span class="kw-2">&mut </span>chp)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>}; |
| |
| <span class="kw">let </span>ch = Message { |
| typ: ContentType::Handshake, |
| <span class="comment">// "This value MUST be set to 0x0303 for all records generated |
| // by a TLS 1.3 implementation other than an initial ClientHello |
| // (i.e., one not generated after a HelloRetryRequest)" |
| </span>version: <span class="kw">if </span>retryreq.is_some() { |
| ProtocolVersion::TLSv1_2 |
| } <span class="kw">else </span>{ |
| ProtocolVersion::TLSv1_0 |
| }, |
| payload: MessagePayload::Handshake(chp), |
| }; |
| |
| <span class="kw">if </span>retryreq.is_some() { |
| <span class="comment">// send dummy CCS to fool middleboxes prior |
| // to second client hello |
| </span>tls13::emit_fake_ccs(<span class="kw-2">&mut </span>handshake, sess); |
| } |
| |
| <span class="macro">trace!</span>(<span class="string">"Sending ClientHello {:#?}"</span>, ch); |
| |
| handshake.transcript.add_message(<span class="kw-2">&</span>ch); |
| sess.common.send_msg(ch, <span class="bool-val">false</span>); |
| |
| <span class="comment">// Calculate the hash of ClientHello and use it to derive EarlyTrafficSecret |
| </span><span class="kw">if </span>sess.early_data.is_enabled() { |
| <span class="comment">// For middlebox compatibility |
| </span>tls13::emit_fake_ccs(<span class="kw-2">&mut </span>handshake, sess); |
| |
| <span class="comment">// It is safe to call unwrap() because fill_in_binder is true. |
| </span><span class="kw">let </span>resuming_suite = handshake |
| .resuming_session |
| .as_ref() |
| .and_then(|resume| sess.find_cipher_suite(resume.cipher_suite)) |
| .unwrap(); |
| |
| <span class="kw">let </span>client_hello_hash = handshake |
| .transcript |
| .get_hash_given(resuming_suite.get_hash(), <span class="kw-2">&</span>[]); |
| <span class="kw">let </span>client_early_traffic_secret = early_key_schedule |
| .as_ref() |
| .unwrap() |
| .client_early_traffic_secret( |
| <span class="kw-2">&</span>client_hello_hash, |
| <span class="kw-2">&*</span>sess.config.key_log, |
| <span class="kw-2">&</span>handshake.randoms.client, |
| ); |
| <span class="comment">// Set early data encryption key |
| </span>sess.common |
| .record_layer |
| .set_message_encrypter(cipher::new_tls13_write( |
| resuming_suite, |
| <span class="kw-2">&</span>client_early_traffic_secret, |
| )); |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"quic"</span>)] |
| </span>{ |
| sess.common.quic.early_secret = <span class="prelude-val">Some</span>(client_early_traffic_secret); |
| } |
| |
| <span class="comment">// Now the client can send encrypted early data |
| </span>sess.common.early_traffic = <span class="bool-val">true</span>; |
| <span class="macro">trace!</span>(<span class="string">"Starting early data traffic"</span>); |
| } |
| |
| <span class="kw">let </span>next = ExpectServerHello { |
| handshake, |
| hello, |
| early_key_schedule, |
| server_cert: ServerCertDetails::new(), |
| may_send_cert_status: <span class="bool-val">false</span>, |
| must_issue_new_ticket: <span class="bool-val">false</span>, |
| }; |
| |
| <span class="kw">if </span>support_tls13 && retryreq.is_none() { |
| Box::new(ExpectServerHelloOrHelloRetryRequest(next)) |
| } <span class="kw">else </span>{ |
| Box::new(next) |
| } |
| } |
| |
| <span class="kw">pub fn </span>process_alpn_protocol( |
| sess: <span class="kw-2">&mut </span>ClientSessionImpl, |
| proto: <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[u8]>, |
| ) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| sess.alpn_protocol = proto.map(ToOwned::to_owned); |
| <span class="kw">if </span>sess.alpn_protocol.is_some() |
| && !sess |
| .config |
| .alpn_protocols |
| .contains(sess.alpn_protocol.as_ref().unwrap()) |
| { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server sent non-offered ALPN protocol"</span>)); |
| } |
| <span class="macro">debug!</span>( |
| <span class="string">"ALPN protocol is {:?}"</span>, |
| sess.alpn_protocol |
| .as_ref() |
| .map(|v| bs_debug::BsDebug(<span class="kw-2">&</span>v)) |
| ); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>sct_list_is_invalid(scts: <span class="kw-2">&</span>SCTList) -> bool { |
| scts.is_empty() || scts.iter().any(|sct| sct.<span class="number">0</span>.is_empty()) |
| } |
| |
| <span class="kw">impl </span>ExpectServerHello { |
| <span class="kw">fn </span>into_expect_tls13_encrypted_extensions( |
| <span class="self">self</span>, |
| key_schedule: KeyScheduleHandshake, |
| ) -> NextState { |
| Box::new(tls13::ExpectEncryptedExtensions { |
| handshake: <span class="self">self</span>.handshake, |
| key_schedule, |
| server_cert: <span class="self">self</span>.server_cert, |
| hello: <span class="self">self</span>.hello, |
| }) |
| } |
| |
| <span class="kw">fn </span>into_expect_tls12_new_ticket_resume( |
| <span class="self">self</span>, |
| secrets: SessionSecrets, |
| certv: verify::ServerCertVerified, |
| sigv: verify::HandshakeSignatureValid, |
| ) -> NextState { |
| Box::new(tls12::ExpectNewTicket { |
| secrets, |
| handshake: <span class="self">self</span>.handshake, |
| resuming: <span class="bool-val">true</span>, |
| cert_verified: certv, |
| sig_verified: sigv, |
| }) |
| } |
| |
| <span class="kw">fn </span>into_expect_tls12_ccs_resume( |
| <span class="self">self</span>, |
| secrets: SessionSecrets, |
| certv: verify::ServerCertVerified, |
| sigv: verify::HandshakeSignatureValid, |
| ) -> NextState { |
| Box::new(tls12::ExpectCCS { |
| secrets, |
| handshake: <span class="self">self</span>.handshake, |
| ticket: ReceivedTicketDetails::new(), |
| resuming: <span class="bool-val">true</span>, |
| cert_verified: certv, |
| sig_verified: sigv, |
| }) |
| } |
| |
| <span class="kw">fn </span>into_expect_tls12_certificate(<span class="self">self</span>) -> NextState { |
| Box::new(tls12::ExpectCertificate { |
| handshake: <span class="self">self</span>.handshake, |
| server_cert: <span class="self">self</span>.server_cert, |
| may_send_cert_status: <span class="self">self</span>.may_send_cert_status, |
| must_issue_new_ticket: <span class="self">self</span>.must_issue_new_ticket, |
| }) |
| } |
| } |
| |
| <span class="kw">impl </span>State <span class="kw">for </span>ExpectServerHello { |
| <span class="kw">fn </span>handle(<span class="kw-2">mut </span><span class="self">self</span>: Box<<span class="self">Self</span>>, sess: <span class="kw-2">&mut </span>ClientSessionImpl, m: Message) -> NextStateOrError { |
| <span class="kw">let </span>server_hello = |
| <span class="macro">require_handshake_msg!</span>(m, HandshakeType::ServerHello, HandshakePayload::ServerHello)<span class="question-mark">?</span>; |
| <span class="macro">trace!</span>(<span class="string">"We got ServerHello {:#?}"</span>, server_hello); |
| |
| <span class="kw">use </span><span class="kw">crate</span>::ProtocolVersion::{TLSv1_2, TLSv1_3}; |
| <span class="kw">let </span>tls13_supported = sess.config.supports_version(TLSv1_3); |
| |
| <span class="kw">let </span>server_version = <span class="kw">if </span>server_hello.legacy_version == TLSv1_2 { |
| server_hello |
| .get_supported_versions() |
| .unwrap_or(server_hello.legacy_version) |
| } <span class="kw">else </span>{ |
| server_hello.legacy_version |
| }; |
| |
| <span class="kw">match </span>server_version { |
| TLSv1_3 <span class="kw">if </span>tls13_supported => { |
| sess.common.negotiated_version = <span class="prelude-val">Some</span>(TLSv1_3); |
| } |
| TLSv1_2 <span class="kw">if </span>sess.config.supports_version(TLSv1_2) => { |
| <span class="kw">if </span>sess.early_data.is_enabled() && sess.common.early_traffic { |
| <span class="comment">// The client must fail with a dedicated error code if the server |
| // responds with TLS 1.2 when offering 0-RTT. |
| </span><span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"server chose v1.2 when offering 0-rtt"</span>.to_string(), |
| )); |
| } |
| sess.common.negotiated_version = <span class="prelude-val">Some</span>(TLSv1_2); |
| |
| <span class="kw">if </span>server_hello |
| .get_supported_versions() |
| .is_some() |
| { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"server chose v1.2 using v1.3 extension"</span>, |
| )); |
| } |
| } |
| <span class="kw">_ </span>=> { |
| sess.common |
| .send_fatal_alert(AlertDescription::ProtocolVersion); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerIncompatibleError( |
| <span class="string">"server does not support TLS v1.2/v1.3"</span>.to_string(), |
| )); |
| } |
| }; |
| |
| <span class="kw">if </span>server_hello.compression_method != Compression::Null { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server chose non-Null compression"</span>)); |
| } |
| |
| <span class="kw">if </span>server_hello.has_duplicate_extension() { |
| sess.common |
| .send_fatal_alert(AlertDescription::DecodeError); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"server sent duplicate extensions"</span>.to_string(), |
| )); |
| } |
| |
| <span class="kw">let </span>allowed_unsolicited = [ExtensionType::RenegotiationInfo]; |
| <span class="kw">if </span><span class="self">self |
| </span>.hello |
| .server_sent_unsolicited_extensions(<span class="kw-2">&</span>server_hello.extensions, <span class="kw-2">&</span>allowed_unsolicited) |
| { |
| sess.common |
| .send_fatal_alert(AlertDescription::UnsupportedExtension); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"server sent unsolicited extension"</span>.to_string(), |
| )); |
| } |
| |
| <span class="comment">// Extract ALPN protocol |
| </span><span class="kw">if </span>!sess.common.is_tls13() { |
| process_alpn_protocol(sess, server_hello.get_alpn_protocol())<span class="question-mark">?</span>; |
| } |
| |
| <span class="comment">// If ECPointFormats extension is supplied by the server, it must contain |
| // Uncompressed. But it's allowed to be omitted. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(point_fmts) = server_hello.get_ecpoints_extension() { |
| <span class="kw">if </span>!point_fmts.contains(<span class="kw-2">&</span>ECPointFormat::Uncompressed) { |
| sess.common |
| .send_fatal_alert(AlertDescription::HandshakeFailure); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"server does not support uncompressed points"</span>.to_string(), |
| )); |
| } |
| } |
| |
| <span class="kw">let </span>scs = sess.find_cipher_suite(server_hello.cipher_suite); |
| |
| <span class="kw">if </span>scs.is_none() { |
| sess.common |
| .send_fatal_alert(AlertDescription::HandshakeFailure); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError( |
| <span class="string">"server chose non-offered ciphersuite"</span>.to_string(), |
| )); |
| } |
| |
| <span class="macro">debug!</span>(<span class="string">"Using ciphersuite {:?}"</span>, server_hello.cipher_suite); |
| <span class="kw">if </span>!sess.common.set_suite(scs.unwrap()) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server varied selected ciphersuite"</span>)); |
| } |
| |
| <span class="kw">let </span>version = sess.common.negotiated_version.unwrap(); |
| <span class="kw">if </span>!sess |
| .common |
| .get_suite_assert() |
| .usable_for_version(version) |
| { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"server chose unusable ciphersuite for version"</span>, |
| )); |
| } |
| |
| <span class="comment">// Start our handshake hash, and input the server-hello. |
| </span><span class="kw">let </span>starting_hash = sess |
| .common |
| .get_suite_assert() |
| .get_hash(); |
| <span class="self">self</span>.handshake |
| .transcript |
| .start_hash(starting_hash); |
| <span class="self">self</span>.handshake |
| .transcript |
| .add_message(<span class="kw-2">&</span>m); |
| |
| <span class="comment">// For TLS1.3, start message encryption using |
| // handshake_traffic_secret. |
| </span><span class="kw">if </span>sess.common.is_tls13() { |
| tls13::validate_server_hello(sess, <span class="kw-2">&</span>server_hello)<span class="question-mark">?</span>; |
| <span class="kw">let </span>key_schedule = tls13::start_handshake_traffic( |
| sess, |
| <span class="self">self</span>.early_key_schedule.take(), |
| <span class="kw-2">&</span>server_hello, |
| <span class="kw-2">&mut </span><span class="self">self</span>.handshake, |
| <span class="kw-2">&mut </span><span class="self">self</span>.hello, |
| )<span class="question-mark">?</span>; |
| tls13::emit_fake_ccs(<span class="kw-2">&mut </span><span class="self">self</span>.handshake, sess); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(<span class="self">self</span>.into_expect_tls13_encrypted_extensions(key_schedule)); |
| } |
| |
| <span class="comment">// TLS1.2 only from here-on |
| |
| // Save ServerRandom and SessionID |
| </span>server_hello |
| .random |
| .write_slice(<span class="kw-2">&mut </span><span class="self">self</span>.handshake.randoms.server); |
| <span class="self">self</span>.handshake.session_id = server_hello.session_id; |
| |
| <span class="comment">// Look for TLS1.3 downgrade signal in server random |
| </span><span class="kw">if </span>tls13_supported |
| && <span class="self">self |
| </span>.handshake |
| .randoms |
| .has_tls12_downgrade_marker() |
| { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"downgrade to TLS1.2 when TLS1.3 is supported"</span>, |
| )); |
| } |
| |
| <span class="comment">// Doing EMS? |
| </span><span class="kw">if </span>server_hello.ems_support_acked() { |
| <span class="self">self</span>.handshake.using_ems = <span class="bool-val">true</span>; |
| } |
| |
| <span class="comment">// Might the server send a ticket? |
| </span><span class="kw">let </span>with_tickets = <span class="kw">if </span>server_hello |
| .find_extension(ExtensionType::SessionTicket) |
| .is_some() |
| { |
| <span class="macro">debug!</span>(<span class="string">"Server supports tickets"</span>); |
| <span class="bool-val">true |
| </span>} <span class="kw">else </span>{ |
| <span class="bool-val">false |
| </span>}; |
| <span class="self">self</span>.must_issue_new_ticket = with_tickets; |
| |
| <span class="comment">// Might the server send a CertificateStatus between Certificate and |
| // ServerKeyExchange? |
| </span><span class="kw">if </span>server_hello |
| .find_extension(ExtensionType::StatusRequest) |
| .is_some() |
| { |
| <span class="macro">debug!</span>(<span class="string">"Server may staple OCSP response"</span>); |
| <span class="self">self</span>.may_send_cert_status = <span class="bool-val">true</span>; |
| } |
| |
| <span class="comment">// Save any sent SCTs for verification against the certificate. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(sct_list) = server_hello.get_sct_list() { |
| <span class="macro">debug!</span>(<span class="string">"Server sent {:?} SCTs"</span>, sct_list.len()); |
| |
| <span class="kw">if </span>sct_list_is_invalid(sct_list) { |
| <span class="kw">let </span>error_msg = <span class="string">"server sent invalid SCT list"</span>.to_string(); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError(error_msg)); |
| } |
| <span class="self">self</span>.server_cert.scts = <span class="prelude-val">Some</span>(sct_list.clone()); |
| } |
| |
| <span class="comment">// See if we're successfully resuming. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>resuming) = <span class="self">self</span>.handshake.resuming_session { |
| <span class="kw">if </span>resuming.session_id == <span class="self">self</span>.handshake.session_id { |
| <span class="macro">debug!</span>(<span class="string">"Server agreed to resume"</span>); |
| |
| <span class="comment">// Is the server telling lies about the ciphersuite? |
| </span><span class="kw">if </span>resuming.cipher_suite != scs.unwrap().suite { |
| <span class="kw">let </span>error_msg = <span class="string">"abbreviated handshake offered, but with varied cs"</span>.to_string(); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError(error_msg)); |
| } |
| |
| <span class="comment">// And about EMS support? |
| </span><span class="kw">if </span>resuming.extended_ms != <span class="self">self</span>.handshake.using_ems { |
| <span class="kw">let </span>error_msg = <span class="string">"server varied ems support over resume"</span>.to_string(); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerMisbehavedError(error_msg)); |
| } |
| |
| <span class="kw">let </span>secrets = SessionSecrets::new_resume( |
| <span class="kw-2">&</span><span class="self">self</span>.handshake.randoms, |
| scs.unwrap().get_hash(), |
| <span class="kw-2">&</span>resuming.master_secret.<span class="number">0</span>, |
| ); |
| sess.config.key_log.log( |
| <span class="string">"CLIENT_RANDOM"</span>, |
| <span class="kw-2">&</span>secrets.randoms.client, |
| <span class="kw-2">&</span>secrets.master_secret, |
| ); |
| sess.common |
| .start_encryption_tls12(<span class="kw-2">&</span>secrets); |
| |
| <span class="comment">// Since we're resuming, we verified the certificate and |
| // proof of possession in the prior session. |
| </span>sess.server_cert_chain = resuming.server_cert_chain.clone(); |
| <span class="kw">let </span>certv = verify::ServerCertVerified::assertion(); |
| <span class="kw">let </span>sigv = verify::HandshakeSignatureValid::assertion(); |
| |
| <span class="kw">return if </span><span class="self">self</span>.must_issue_new_ticket { |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.into_expect_tls12_new_ticket_resume(secrets, certv, sigv)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.into_expect_tls12_ccs_resume(secrets, certv, sigv)) |
| }; |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.into_expect_tls12_certificate()) |
| } |
| } |
| |
| <span class="kw">impl </span>ExpectServerHelloOrHelloRetryRequest { |
| <span class="kw">fn </span>into_expect_server_hello(<span class="self">self</span>) -> NextState { |
| Box::new(<span class="self">self</span>.<span class="number">0</span>) |
| } |
| |
| <span class="kw">fn </span>handle_hello_retry_request( |
| <span class="kw-2">mut </span><span class="self">self</span>, |
| sess: <span class="kw-2">&mut </span>ClientSessionImpl, |
| m: Message, |
| ) -> NextStateOrError { |
| <span class="kw">let </span>hrr = <span class="macro">require_handshake_msg!</span>( |
| m, |
| HandshakeType::HelloRetryRequest, |
| HandshakePayload::HelloRetryRequest |
| )<span class="question-mark">?</span>; |
| <span class="macro">trace!</span>(<span class="string">"Got HRR {:?}"</span>, hrr); |
| |
| check_aligned_handshake(sess)<span class="question-mark">?</span>; |
| |
| <span class="kw">let </span>has_cookie = hrr.get_cookie().is_some(); |
| <span class="kw">let </span>req_group = hrr.get_requested_key_share_group(); |
| |
| <span class="comment">// A retry request is illegal if it contains no cookie and asks for |
| // retry of a group we already sent. |
| </span><span class="kw">if </span>!has_cookie |
| && req_group |
| .map(|g| <span class="self">self</span>.<span class="number">0</span>.hello.has_key_share(g)) |
| .unwrap_or(<span class="bool-val">false</span>) |
| { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server requested hrr with our group"</span>)); |
| } |
| |
| <span class="comment">// Or asks for us to retry on an unsupported group. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(group) = req_group { |
| <span class="kw">if </span>!suites::KeyExchange::supported_groups().contains(<span class="kw-2">&</span>group) { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server requested hrr with bad group"</span>)); |
| } |
| } |
| |
| <span class="comment">// Or has an empty cookie. |
| </span><span class="kw">if </span>has_cookie && hrr.get_cookie().unwrap().<span class="number">0</span>.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"server requested hrr with empty cookie"</span>, |
| )); |
| } |
| |
| <span class="comment">// Or has something unrecognised |
| </span><span class="kw">if </span>hrr.has_unknown_extension() { |
| sess.common |
| .send_fatal_alert(AlertDescription::UnsupportedExtension); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::PeerIncompatibleError( |
| <span class="string">"server sent hrr with unhandled extension"</span>.to_string(), |
| )); |
| } |
| |
| <span class="comment">// Or has the same extensions more than once |
| </span><span class="kw">if </span>hrr.has_duplicate_extension() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server send duplicate hrr extensions"</span>)); |
| } |
| |
| <span class="comment">// Or asks us to change nothing. |
| </span><span class="kw">if </span>!has_cookie && req_group.is_none() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param(sess, <span class="string">"server requested hrr with no changes"</span>)); |
| } |
| |
| <span class="comment">// Or asks us to talk a protocol we didn't offer, or doesn't support HRR at all. |
| </span><span class="kw">match </span>hrr.get_supported_versions() { |
| <span class="prelude-val">Some</span>(ProtocolVersion::TLSv1_3) => { |
| sess.common.negotiated_version = <span class="prelude-val">Some</span>(ProtocolVersion::TLSv1_3); |
| } |
| <span class="kw">_ </span>=> { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"server requested unsupported version in hrr"</span>, |
| )); |
| } |
| } |
| |
| <span class="comment">// Or asks us to use a ciphersuite we didn't offer. |
| </span><span class="kw">let </span>maybe_cs = sess.find_cipher_suite(hrr.cipher_suite); |
| <span class="kw">let </span>cs = <span class="kw">match </span>maybe_cs { |
| <span class="prelude-val">Some</span>(cs) => cs, |
| <span class="prelude-val">None </span>=> { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(illegal_param( |
| sess, |
| <span class="string">"server requested unsupported cs in hrr"</span>, |
| )); |
| } |
| }; |
| |
| <span class="comment">// HRR selects the ciphersuite. |
| </span>sess.common.set_suite(cs); |
| |
| <span class="comment">// This is the draft19 change where the transcript became a tree |
| </span><span class="self">self</span>.<span class="number">0 |
| </span>.handshake |
| .transcript |
| .start_hash(cs.get_hash()); |
| <span class="self">self</span>.<span class="number">0 |
| </span>.handshake |
| .transcript |
| .rollup_for_hrr(); |
| <span class="self">self</span>.<span class="number">0 |
| </span>.handshake |
| .transcript |
| .add_message(<span class="kw-2">&</span>m); |
| |
| <span class="comment">// Early data is not alllowed after HelloRetryrequest |
| </span><span class="kw">if </span>sess.early_data.is_enabled() { |
| sess.early_data.rejected(); |
| } |
| |
| <span class="prelude-val">Ok</span>(emit_client_hello_for_retry( |
| sess, |
| <span class="self">self</span>.<span class="number">0</span>.handshake, |
| <span class="self">self</span>.<span class="number">0</span>.hello, |
| <span class="prelude-val">Some</span>(<span class="kw-2">&</span>hrr), |
| )) |
| } |
| } |
| |
| <span class="kw">impl </span>State <span class="kw">for </span>ExpectServerHelloOrHelloRetryRequest { |
| <span class="kw">fn </span>handle(<span class="self">self</span>: Box<<span class="self">Self</span>>, sess: <span class="kw-2">&mut </span>ClientSessionImpl, m: Message) -> NextStateOrError { |
| check_message( |
| <span class="kw-2">&</span>m, |
| <span class="kw-2">&</span>[ContentType::Handshake], |
| <span class="kw-2">&</span>[HandshakeType::ServerHello, HandshakeType::HelloRetryRequest], |
| )<span class="question-mark">?</span>; |
| <span class="kw">if </span>m.is_handshake_type(HandshakeType::ServerHello) { |
| <span class="self">self</span>.into_expect_server_hello() |
| .handle(sess, m) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.handle_hello_retry_request(sess, m) |
| } |
| } |
| } |
| |
| <span class="kw">pub fn </span>send_cert_error_alert(sess: <span class="kw-2">&mut </span>ClientSessionImpl, err: TLSError) -> TLSError { |
| <span class="kw">match </span>err { |
| TLSError::WebPKIError(webpki::Error::BadDER) => { |
| sess.common |
| .send_fatal_alert(AlertDescription::DecodeError); |
| } |
| TLSError::PeerMisbehavedError(<span class="kw">_</span>) => { |
| sess.common |
| .send_fatal_alert(AlertDescription::IllegalParameter); |
| } |
| <span class="kw">_ </span>=> { |
| sess.common |
| .send_fatal_alert(AlertDescription::BadCertificate); |
| } |
| }; |
| |
| err |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="rustls" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |