| <!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/registry/src/github.com-1ecc6299db9ec823/rustls-0.19.1/src/client/mod.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>mod.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="kw">use </span><span class="kw">crate</span>::anchors; |
| <span class="kw">use </span><span class="kw">crate</span>::error::TLSError; |
| <span class="kw">use </span><span class="kw">crate</span>::key; |
| <span class="kw">use </span><span class="kw">crate</span>::keylog::{KeyLog, NoKeyLog}; |
| <span class="attribute">#[cfg(feature = <span class="string">"logging"</span>)] |
| </span><span class="kw">use </span><span class="kw">crate</span>::log::trace; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::CipherSuite; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::SignatureScheme; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{AlertDescription, HandshakeType}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{ContentType, ProtocolVersion}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::CertificatePayload; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::ClientExtension; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::message::Message; |
| <span class="kw">use </span><span class="kw">crate</span>::session::{MiddleboxCCS, Session, SessionCommon}; |
| <span class="kw">use </span><span class="kw">crate</span>::sign; |
| <span class="kw">use </span><span class="kw">crate</span>::suites::{SupportedCipherSuite, ALL_CIPHERSUITES}; |
| <span class="kw">use </span><span class="kw">crate</span>::verify; |
| |
| <span class="kw">use </span>std::fmt; |
| <span class="kw">use </span>std::io::{<span class="self">self</span>, IoSlice}; |
| <span class="kw">use </span>std::mem; |
| <span class="kw">use </span>std::sync::Arc; |
| |
| <span class="kw">use </span>sct; |
| <span class="kw">use </span>webpki; |
| |
| <span class="attribute">#[macro_use] |
| </span><span class="kw">mod </span>hs; |
| <span class="kw">mod </span>common; |
| <span class="kw">pub mod </span>handy; |
| <span class="kw">mod </span>tls12; |
| <span class="kw">mod </span>tls13; |
| |
| <span class="doccomment">/// A trait for the ability to store client session data. |
| /// The keys and values are opaque. |
| /// |
| /// Both the keys and values should be treated as |
| /// **highly sensitive data**, containing enough key material |
| /// to break all security of the corresponding session. |
| /// |
| /// `put` is a mutating operation; this isn't expressed |
| /// in the type system to allow implementations freedom in |
| /// how to achieve interior mutability. `Mutex` is a common |
| /// choice. |
| </span><span class="kw">pub trait </span>StoresClientSessions: Send + Sync { |
| <span class="doccomment">/// Stores a new `value` for `key`. Returns `true` |
| /// if the value was stored. |
| </span><span class="kw">fn </span>put(<span class="kw-2">&</span><span class="self">self</span>, key: Vec<u8>, value: Vec<u8>) -> bool; |
| |
| <span class="doccomment">/// Returns the latest value for `key`. Returns `None` |
| /// if there's no such value. |
| </span><span class="kw">fn </span>get(<span class="kw-2">&</span><span class="self">self</span>, key: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><Vec<u8>>; |
| } |
| |
| <span class="doccomment">/// A trait for the ability to choose a certificate chain and |
| /// private key for the purposes of client authentication. |
| </span><span class="kw">pub trait </span>ResolvesClientCert: Send + Sync { |
| <span class="doccomment">/// With the server-supplied acceptable issuers in `acceptable_issuers`, |
| /// the server's supported signature schemes in `sigschemes`, |
| /// return a certificate chain and signing key to authenticate. |
| /// |
| /// `acceptable_issuers` is undecoded and unverified by the rustls |
| /// library, but it should be expected to contain a DER encodings |
| /// of X501 NAMEs. |
| /// |
| /// Return None to continue the handshake without any client |
| /// authentication. The server may reject the handshake later |
| /// if it requires authentication. |
| </span><span class="kw">fn </span>resolve( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| acceptable_issuers: <span class="kw-2">&</span>[<span class="kw-2">&</span>[u8]], |
| sigschemes: <span class="kw-2">&</span>[SignatureScheme], |
| ) -> <span class="prelude-ty">Option</span><sign::CertifiedKey>; |
| |
| <span class="doccomment">/// Return true if any certificates at all are available. |
| </span><span class="kw">fn </span>has_certs(<span class="kw-2">&</span><span class="self">self</span>) -> bool; |
| } |
| |
| <span class="doccomment">/// Common configuration for (typically) all connections made by |
| /// a program. |
| /// |
| /// Making one of these can be expensive, and should be |
| /// once per process rather than once per connection. |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>ClientConfig { |
| <span class="doccomment">/// List of ciphersuites, in preference order. |
| </span><span class="kw">pub </span>ciphersuites: Vec<<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite>, |
| |
| <span class="doccomment">/// Collection of root certificates. |
| </span><span class="kw">pub </span>root_store: anchors::RootCertStore, |
| |
| <span class="doccomment">/// Which ALPN protocols we include in our client hello. |
| /// If empty, no ALPN extension is sent. |
| </span><span class="kw">pub </span>alpn_protocols: Vec<Vec<u8>>, |
| |
| <span class="doccomment">/// How we store session data or tickets. |
| </span><span class="kw">pub </span>session_persistence: Arc<<span class="kw">dyn </span>StoresClientSessions>, |
| |
| <span class="doccomment">/// Our MTU. If None, we don't limit TLS message sizes. |
| </span><span class="kw">pub </span>mtu: <span class="prelude-ty">Option</span><usize>, |
| |
| <span class="doccomment">/// How to decide what client auth certificate/keys to use. |
| </span><span class="kw">pub </span>client_auth_cert_resolver: Arc<<span class="kw">dyn </span>ResolvesClientCert>, |
| |
| <span class="doccomment">/// Whether to support RFC5077 tickets. You must provide a working |
| /// `session_persistence` member for this to have any meaningful |
| /// effect. |
| /// |
| /// The default is true. |
| </span><span class="kw">pub </span>enable_tickets: bool, |
| |
| <span class="doccomment">/// Supported versions, in no particular order. The default |
| /// is all supported versions. |
| </span><span class="kw">pub </span>versions: Vec<ProtocolVersion>, |
| |
| <span class="doccomment">/// Collection of certificate transparency logs. |
| /// If this collection is empty, then certificate transparency |
| /// checking is disabled. |
| </span><span class="kw">pub </span>ct_logs: <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>[<span class="kw-2">&</span><span class="lifetime">'static </span>sct::Log<<span class="lifetime">'static</span>>]>, |
| |
| <span class="doccomment">/// Whether to send the Server Name Indication (SNI) extension |
| /// during the client handshake. |
| /// |
| /// The default is true. |
| </span><span class="kw">pub </span>enable_sni: bool, |
| |
| <span class="doccomment">/// How to verify the server certificate chain. |
| </span>verifier: Arc<<span class="kw">dyn </span>verify::ServerCertVerifier>, |
| |
| <span class="doccomment">/// How to output key material for debugging. The default |
| /// does nothing. |
| </span><span class="kw">pub </span>key_log: Arc<<span class="kw">dyn </span>KeyLog>, |
| |
| <span class="doccomment">/// Whether to send data on the first flight ("early data") in |
| /// TLS 1.3 handshakes. |
| /// |
| /// The default is false. |
| </span><span class="kw">pub </span>enable_early_data: bool, |
| } |
| |
| <span class="kw">impl </span>Default <span class="kw">for </span>ClientConfig { |
| <span class="kw">fn </span>default() -> <span class="self">Self </span>{ |
| <span class="self">Self</span>::new() |
| } |
| } |
| |
| <span class="kw">impl </span>ClientConfig { |
| <span class="doccomment">/// Make a `ClientConfig` with a default set of ciphersuites, |
| /// no root certificates, no ALPN protocols, and no client auth. |
| /// |
| /// The default session persistence provider stores up to 32 |
| /// items in memory. |
| </span><span class="kw">pub fn </span>new() -> ClientConfig { |
| ClientConfig::with_ciphersuites(<span class="kw-2">&</span>ALL_CIPHERSUITES) |
| } |
| |
| <span class="doccomment">/// Make a `ClientConfig` with a custom set of ciphersuites, |
| /// no root certificates, no ALPN protocols, and no client auth. |
| /// |
| /// The default session persistence provider stores up to 32 |
| /// items in memory. |
| </span><span class="kw">pub fn </span>with_ciphersuites(ciphersuites: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite]) -> ClientConfig { |
| ClientConfig { |
| ciphersuites: ciphersuites.to_vec(), |
| root_store: anchors::RootCertStore::empty(), |
| alpn_protocols: Vec::new(), |
| session_persistence: handy::ClientSessionMemoryCache::new(<span class="number">32</span>), |
| mtu: <span class="prelude-val">None</span>, |
| client_auth_cert_resolver: Arc::new(handy::FailResolveClientCert {}), |
| enable_tickets: <span class="bool-val">true</span>, |
| versions: <span class="macro">vec!</span>[ProtocolVersion::TLSv1_3, ProtocolVersion::TLSv1_2], |
| ct_logs: <span class="prelude-val">None</span>, |
| enable_sni: <span class="bool-val">true</span>, |
| verifier: Arc::new(verify::WebPKIVerifier::new()), |
| key_log: Arc::new(NoKeyLog {}), |
| enable_early_data: <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="attribute">#[doc(hidden)] |
| </span><span class="doccomment">/// We support a given TLS version if it's quoted in the configured |
| /// versions *and* at least one ciphersuite for this version is |
| /// also configured. |
| </span><span class="kw">pub fn </span>supports_version(<span class="kw-2">&</span><span class="self">self</span>, v: ProtocolVersion) -> bool { |
| <span class="self">self</span>.versions.contains(<span class="kw-2">&</span>v) |
| && <span class="self">self |
| </span>.ciphersuites |
| .iter() |
| .any(|cs| cs.usable_for_version(v)) |
| } |
| |
| <span class="attribute">#[doc(hidden)] |
| </span><span class="kw">pub fn </span>get_verifier(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="kw">dyn </span>verify::ServerCertVerifier { |
| <span class="self">self</span>.verifier.as_ref() |
| } |
| |
| <span class="doccomment">/// Set the ALPN protocol list to the given protocol names. |
| /// Overwrites any existing configured protocols. |
| /// The first element in the `protocols` list is the most |
| /// preferred, the last is the least preferred. |
| </span><span class="kw">pub fn </span>set_protocols(<span class="kw-2">&mut </span><span class="self">self</span>, protocols: <span class="kw-2">&</span>[Vec<u8>]) { |
| <span class="self">self</span>.alpn_protocols.clear(); |
| <span class="self">self</span>.alpn_protocols |
| .extend_from_slice(protocols); |
| } |
| |
| <span class="doccomment">/// Sets persistence layer to `persist`. |
| </span><span class="kw">pub fn </span>set_persistence(<span class="kw-2">&mut </span><span class="self">self</span>, persist: Arc<<span class="kw">dyn </span>StoresClientSessions>) { |
| <span class="self">self</span>.session_persistence = persist; |
| } |
| |
| <span class="doccomment">/// Sets MTU to `mtu`. If None, the default is used. |
| /// If Some(x) then x must be greater than 5 bytes. |
| </span><span class="kw">pub fn </span>set_mtu(<span class="kw-2">&mut </span><span class="self">self</span>, mtu: <span class="kw-2">&</span><span class="prelude-ty">Option</span><usize>) { |
| <span class="comment">// Internally our MTU relates to fragment size, and does |
| // not include the TLS header overhead. |
| // |
| // Externally the MTU is the whole packet size. The difference |
| // is PACKET_OVERHEAD. |
| </span><span class="kw">if let </span><span class="prelude-val">Some</span>(x) = <span class="kw-2">*</span>mtu { |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::fragmenter; |
| <span class="macro">debug_assert!</span>(x > fragmenter::PACKET_OVERHEAD); |
| <span class="self">self</span>.mtu = <span class="prelude-val">Some</span>(x - fragmenter::PACKET_OVERHEAD); |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.mtu = <span class="prelude-val">None</span>; |
| } |
| } |
| |
| <span class="doccomment">/// Sets a single client authentication certificate and private key. |
| /// This is blindly used for all servers that ask for client auth. |
| /// |
| /// `cert_chain` is a vector of DER-encoded certificates, |
| /// `key_der` is a DER-encoded RSA or ECDSA private key. |
| </span><span class="kw">pub fn </span>set_single_client_cert( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| cert_chain: Vec<key::Certificate>, |
| key_der: key::PrivateKey, |
| ) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="kw">let </span>resolver = handy::AlwaysResolvesClientCert::new(cert_chain, <span class="kw-2">&</span>key_der)<span class="question-mark">?</span>; |
| <span class="self">self</span>.client_auth_cert_resolver = Arc::new(resolver); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Access configuration options whose use is dangerous and requires |
| /// extra care. |
| </span><span class="attribute">#[cfg(feature = <span class="string">"dangerous_configuration"</span>)] |
| </span><span class="kw">pub fn </span>dangerous(<span class="kw-2">&mut </span><span class="self">self</span>) -> danger::DangerousClientConfig { |
| danger::DangerousClientConfig { cfg: <span class="self">self </span>} |
| } |
| } |
| |
| <span class="doccomment">/// Container for unsafe APIs |
| </span><span class="attribute">#[cfg(feature = <span class="string">"dangerous_configuration"</span>)] |
| </span><span class="kw">pub mod </span>danger { |
| <span class="kw">use </span>std::sync::Arc; |
| |
| <span class="kw">use </span><span class="kw">super</span>::verify::ServerCertVerifier; |
| <span class="kw">use </span><span class="kw">super</span>::ClientConfig; |
| |
| <span class="doccomment">/// Accessor for dangerous configuration options. |
| </span><span class="kw">pub struct </span>DangerousClientConfig<<span class="lifetime">'a</span>> { |
| <span class="doccomment">/// The underlying ClientConfig |
| </span><span class="kw">pub </span>cfg: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ClientConfig, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> DangerousClientConfig<<span class="lifetime">'a</span>> { |
| <span class="doccomment">/// Overrides the default `ServerCertVerifier` with something else. |
| </span><span class="kw">pub fn </span>set_certificate_verifier(<span class="kw-2">&mut </span><span class="self">self</span>, verifier: Arc<<span class="kw">dyn </span>ServerCertVerifier>) { |
| <span class="self">self</span>.cfg.verifier = verifier; |
| } |
| } |
| } |
| |
| <span class="attribute">#[derive(Debug, PartialEq)] |
| </span><span class="kw">enum </span>EarlyDataState { |
| Disabled, |
| Ready, |
| Accepted, |
| AcceptedFinished, |
| Rejected, |
| } |
| |
| <span class="kw">pub struct </span>EarlyData { |
| state: EarlyDataState, |
| left: usize, |
| } |
| |
| <span class="kw">impl </span>EarlyData { |
| <span class="kw">fn </span>new() -> EarlyData { |
| EarlyData { |
| left: <span class="number">0</span>, |
| state: EarlyDataState::Disabled, |
| } |
| } |
| |
| <span class="kw">fn </span>is_enabled(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| EarlyDataState::Ready | EarlyDataState::Accepted => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>is_accepted(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| EarlyDataState::Accepted | EarlyDataState::AcceptedFinished => <span class="bool-val">true</span>, |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>enable(<span class="kw-2">&mut </span><span class="self">self</span>, max_data: usize) { |
| <span class="macro">assert_eq!</span>(<span class="self">self</span>.state, EarlyDataState::Disabled); |
| <span class="self">self</span>.state = EarlyDataState::Ready; |
| <span class="self">self</span>.left = max_data; |
| } |
| |
| <span class="kw">fn </span>rejected(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="macro">trace!</span>(<span class="string">"EarlyData rejected"</span>); |
| <span class="self">self</span>.state = EarlyDataState::Rejected; |
| } |
| |
| <span class="kw">fn </span>accepted(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="macro">trace!</span>(<span class="string">"EarlyData accepted"</span>); |
| <span class="macro">assert_eq!</span>(<span class="self">self</span>.state, EarlyDataState::Ready); |
| <span class="self">self</span>.state = EarlyDataState::Accepted; |
| } |
| |
| <span class="kw">fn </span>finished(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="macro">trace!</span>(<span class="string">"EarlyData finished"</span>); |
| <span class="self">self</span>.state = <span class="kw">match </span><span class="self">self</span>.state { |
| EarlyDataState::Accepted => EarlyDataState::AcceptedFinished, |
| <span class="kw">_ </span>=> <span class="macro">panic!</span>(<span class="string">"bad EarlyData state"</span>), |
| } |
| } |
| |
| <span class="kw">fn </span>check_write(<span class="kw-2">&mut </span><span class="self">self</span>, sz: usize) -> io::Result<usize> { |
| <span class="kw">match </span><span class="self">self</span>.state { |
| EarlyDataState::Disabled => <span class="macro">unreachable!</span>(), |
| EarlyDataState::Ready | EarlyDataState::Accepted => { |
| <span class="kw">let </span>take = <span class="kw">if </span><span class="self">self</span>.left < sz { |
| mem::replace(<span class="kw-2">&mut </span><span class="self">self</span>.left, <span class="number">0</span>) |
| } <span class="kw">else </span>{ |
| <span class="self">self</span>.left -= sz; |
| sz |
| }; |
| |
| <span class="prelude-val">Ok</span>(take) |
| } |
| EarlyDataState::Rejected | EarlyDataState::AcceptedFinished => { |
| <span class="prelude-val">Err</span>(io::Error::from(io::ErrorKind::InvalidInput)) |
| } |
| } |
| } |
| |
| <span class="kw">fn </span>bytes_left(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.left |
| } |
| } |
| |
| <span class="doccomment">/// Stub that implements io::Write and dispatches to `write_early_data`. |
| </span><span class="kw">pub struct </span>WriteEarlyData<<span class="lifetime">'a</span>> { |
| sess: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ClientSessionImpl, |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> WriteEarlyData<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>new(sess: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>ClientSessionImpl) -> WriteEarlyData<<span class="lifetime">'a</span>> { |
| WriteEarlyData { sess } |
| } |
| |
| <span class="doccomment">/// How many bytes you may send. Writes will become short |
| /// once this reaches zero. |
| </span><span class="kw">pub fn </span>bytes_left(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.sess.early_data.bytes_left() |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> io::Write <span class="kw">for </span>WriteEarlyData<<span class="lifetime">'a</span>> { |
| <span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.sess.write_early_data(buf) |
| } |
| |
| <span class="kw">fn </span>flush(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<()> { |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="kw">pub struct </span>ClientSessionImpl { |
| <span class="kw">pub </span>config: Arc<ClientConfig>, |
| <span class="kw">pub </span>alpn_protocol: <span class="prelude-ty">Option</span><Vec<u8>>, |
| <span class="kw">pub </span>common: SessionCommon, |
| <span class="kw">pub </span>error: <span class="prelude-ty">Option</span><TLSError>, |
| <span class="kw">pub </span>state: <span class="prelude-ty">Option</span><hs::NextState>, |
| <span class="kw">pub </span>server_cert_chain: CertificatePayload, |
| <span class="kw">pub </span>early_data: EarlyData, |
| <span class="kw">pub </span>resumption_ciphersuite: <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite>, |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>ClientSessionImpl { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> fmt::Result { |
| f.debug_struct(<span class="string">"ClientSessionImpl"</span>) |
| .finish() |
| } |
| } |
| |
| <span class="kw">impl </span>ClientSessionImpl { |
| <span class="kw">pub fn </span>new(config: <span class="kw-2">&</span>Arc<ClientConfig>) -> ClientSessionImpl { |
| ClientSessionImpl { |
| config: config.clone(), |
| alpn_protocol: <span class="prelude-val">None</span>, |
| common: SessionCommon::new(config.mtu, <span class="bool-val">true</span>), |
| error: <span class="prelude-val">None</span>, |
| state: <span class="prelude-val">None</span>, |
| server_cert_chain: Vec::new(), |
| early_data: EarlyData::new(), |
| resumption_ciphersuite: <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="kw">pub fn </span>start_handshake(<span class="kw-2">&mut </span><span class="self">self</span>, hostname: webpki::DNSName, extra_exts: Vec<ClientExtension>) { |
| <span class="self">self</span>.state = <span class="prelude-val">Some</span>(hs::start_handshake(<span class="self">self</span>, hostname, extra_exts)); |
| } |
| |
| <span class="kw">pub fn </span>get_cipher_suites(<span class="kw-2">&</span><span class="self">self</span>) -> Vec<CipherSuite> { |
| <span class="kw">let </span><span class="kw-2">mut </span>ret = Vec::new(); |
| |
| <span class="kw">for </span>cs <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.config.ciphersuites { |
| ret.push(cs.suite); |
| } |
| |
| <span class="comment">// We don't do renegotation at all, in fact. |
| </span>ret.push(CipherSuite::TLS_EMPTY_RENEGOTIATION_INFO_SCSV); |
| |
| ret |
| } |
| |
| <span class="kw">pub fn </span>find_cipher_suite(<span class="kw-2">&</span><span class="self">self</span>, suite: CipherSuite) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| <span class="kw">for </span>scs <span class="kw">in </span><span class="kw-2">&</span><span class="self">self</span>.config.ciphersuites { |
| <span class="kw">if </span>scs.suite == suite { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(scs); |
| } |
| } |
| |
| <span class="prelude-val">None |
| </span>} |
| |
| <span class="kw">pub fn </span>wants_read(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="comment">// We want to read more data all the time, except when we |
| // have unprocessed plaintext. This provides back-pressure |
| // to the TCP buffers. |
| // |
| // This also covers the handshake case, because we don't have |
| // readable plaintext before handshake has completed. |
| </span>!<span class="self">self</span>.common.has_readable_plaintext() |
| } |
| |
| <span class="kw">pub fn </span>wants_write(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| !<span class="self">self</span>.common.sendable_tls.is_empty() |
| } |
| |
| <span class="kw">pub fn </span>is_handshaking(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| !<span class="self">self</span>.common.traffic |
| } |
| |
| <span class="kw">pub fn </span>set_buffer_limit(<span class="kw-2">&mut </span><span class="self">self</span>, len: usize) { |
| <span class="self">self</span>.common.set_buffer_limit(len) |
| } |
| |
| <span class="kw">pub fn </span>process_msg(<span class="kw-2">&mut </span><span class="self">self</span>, <span class="kw-2">mut </span>msg: Message) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="comment">// TLS1.3: drop CCS at any time during handshaking |
| </span><span class="kw">if let </span>MiddleboxCCS::Drop = <span class="self">self</span>.common.filter_tls13_ccs(<span class="kw-2">&</span>msg)<span class="question-mark">? </span>{ |
| <span class="macro">trace!</span>(<span class="string">"Dropping CCS"</span>); |
| <span class="kw">return </span><span class="prelude-val">Ok</span>(()); |
| } |
| |
| <span class="comment">// Decrypt if demanded by current state. |
| </span><span class="kw">if </span><span class="self">self</span>.common.record_layer.is_decrypting() { |
| <span class="kw">let </span>dm = <span class="self">self</span>.common.decrypt_incoming(msg)<span class="question-mark">?</span>; |
| msg = dm; |
| } |
| |
| <span class="comment">// For handshake messages, we need to join them before parsing |
| // and processing. |
| </span><span class="kw">if </span><span class="self">self |
| </span>.common |
| .handshake_joiner |
| .want_message(<span class="kw-2">&</span>msg) |
| { |
| <span class="self">self</span>.common |
| .handshake_joiner |
| .take_message(msg) |
| .ok_or_else(|| { |
| <span class="self">self</span>.common |
| .send_fatal_alert(AlertDescription::DecodeError); |
| TLSError::CorruptMessagePayload(ContentType::Handshake) |
| })<span class="question-mark">?</span>; |
| <span class="kw">return </span><span class="self">self</span>.process_new_handshake_messages(); |
| } |
| |
| <span class="comment">// Now we can fully parse the message payload. |
| </span><span class="kw">if </span>!msg.decode_payload() { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::CorruptMessagePayload(msg.typ)); |
| } |
| |
| <span class="comment">// For alerts, we have separate logic. |
| </span><span class="kw">if </span>msg.is_content_type(ContentType::Alert) { |
| <span class="kw">return </span><span class="self">self</span>.common.process_alert(msg); |
| } |
| |
| <span class="self">self</span>.process_main_protocol(msg) |
| } |
| |
| <span class="kw">pub fn </span>process_new_handshake_messages(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(msg) = <span class="self">self |
| </span>.common |
| .handshake_joiner |
| .frames |
| .pop_front() |
| { |
| <span class="self">self</span>.process_main_protocol(msg)<span class="question-mark">?</span>; |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>reject_renegotiation_attempt(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="self">self</span>.common |
| .send_warning_alert(AlertDescription::NoRenegotiation); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">fn </span>queue_unexpected_alert(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.common |
| .send_fatal_alert(AlertDescription::UnexpectedMessage); |
| } |
| |
| <span class="kw">fn </span>maybe_send_unexpected_alert(<span class="kw-2">&mut </span><span class="self">self</span>, rc: hs::NextStateOrError) -> hs::NextStateOrError { |
| <span class="kw">match </span>rc { |
| <span class="prelude-val">Err</span>(TLSError::InappropriateMessage { .. }) |
| | <span class="prelude-val">Err</span>(TLSError::InappropriateHandshakeMessage { .. }) => { |
| <span class="self">self</span>.queue_unexpected_alert(); |
| } |
| <span class="kw">_ </span>=> {} |
| }; |
| rc |
| } |
| |
| <span class="doccomment">/// Process `msg`. First, we get the current state. Then we ask what messages |
| /// that state expects, enforced via `check_message`. Finally, we ask the handler |
| /// to handle the message. |
| </span><span class="kw">fn </span>process_main_protocol(<span class="kw-2">&mut </span><span class="self">self</span>, msg: Message) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="comment">// For TLS1.2, outside of the handshake, send rejection alerts for |
| // renegotation requests. These can occur any time. |
| </span><span class="kw">if </span>msg.is_handshake_type(HandshakeType::HelloRequest) |
| && !<span class="self">self</span>.common.is_tls13() |
| && !<span class="self">self</span>.is_handshaking() |
| { |
| <span class="kw">return </span><span class="self">self</span>.reject_renegotiation_attempt(); |
| } |
| |
| <span class="kw">let </span>state = <span class="self">self</span>.state.take().unwrap(); |
| <span class="kw">let </span>maybe_next_state = state.handle(<span class="self">self</span>, msg); |
| <span class="kw">let </span>next_state = <span class="self">self</span>.maybe_send_unexpected_alert(maybe_next_state)<span class="question-mark">?</span>; |
| <span class="self">self</span>.state = <span class="prelude-val">Some</span>(next_state); |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>process_new_packets(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(<span class="kw-2">ref </span>err) = <span class="self">self</span>.error { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(err.clone()); |
| } |
| |
| <span class="kw">if </span><span class="self">self</span>.common.message_deframer.desynced { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(TLSError::CorruptMessage); |
| } |
| |
| <span class="kw">while let </span><span class="prelude-val">Some</span>(msg) = <span class="self">self |
| </span>.common |
| .message_deframer |
| .frames |
| .pop_front() |
| { |
| <span class="kw">match </span><span class="self">self</span>.process_msg(msg) { |
| <span class="prelude-val">Ok</span>(<span class="kw">_</span>) => {} |
| <span class="prelude-val">Err</span>(err) => { |
| <span class="self">self</span>.error = <span class="prelude-val">Some</span>(err.clone()); |
| <span class="kw">return </span><span class="prelude-val">Err</span>(err); |
| } |
| } |
| } |
| |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="kw">pub fn </span>get_peer_certificates(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Vec<key::Certificate>> { |
| <span class="kw">if </span><span class="self">self</span>.server_cert_chain.is_empty() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="prelude-val">Some</span>( |
| <span class="self">self</span>.server_cert_chain |
| .iter() |
| .cloned() |
| .collect(), |
| ) |
| } |
| |
| <span class="kw">pub fn </span>get_alpn_protocol(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[u8]> { |
| <span class="self">self</span>.alpn_protocol |
| .as_ref() |
| .map(AsRef::as_ref) |
| } |
| |
| <span class="kw">pub fn </span>get_protocol_version(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><ProtocolVersion> { |
| <span class="self">self</span>.common.negotiated_version |
| } |
| |
| <span class="kw">pub fn </span>get_negotiated_ciphersuite(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| <span class="self">self</span>.common.get_suite() |
| } |
| |
| <span class="kw">pub fn </span>write_early_data(<span class="kw-2">&mut </span><span class="self">self</span>, data: <span class="kw-2">&</span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.early_data |
| .check_write(data.len()) |
| .and_then(|sz| { |
| <span class="prelude-val">Ok</span>(<span class="self">self |
| </span>.common |
| .send_early_plaintext(<span class="kw-2">&</span>data[..sz])) |
| }) |
| } |
| |
| <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="self">self</span>.state |
| .as_ref() |
| .ok_or_else(|| TLSError::HandshakeNotComplete) |
| .and_then(|st| st.export_keying_material(output, label, context)) |
| } |
| |
| <span class="kw">fn </span>send_some_plaintext(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8]) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>st = <span class="self">self</span>.state.take(); |
| st.as_mut() |
| .map(|st| st.perhaps_write_key_update(<span class="self">self</span>)); |
| <span class="self">self</span>.state = st; |
| |
| <span class="self">self</span>.common.send_some_plaintext(buf) |
| } |
| } |
| |
| <span class="doccomment">/// This represents a single TLS client session. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>ClientSession { |
| <span class="comment">// We use the pimpl idiom to hide unimportant details. |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) imp: ClientSessionImpl, |
| } |
| |
| <span class="kw">impl </span>ClientSession { |
| <span class="doccomment">/// Make a new ClientSession. `config` controls how |
| /// we behave in the TLS protocol, `hostname` is the |
| /// hostname of who we want to talk to. |
| </span><span class="kw">pub fn </span>new(config: <span class="kw-2">&</span>Arc<ClientConfig>, hostname: webpki::DNSNameRef) -> ClientSession { |
| <span class="kw">let </span><span class="kw-2">mut </span>imp = ClientSessionImpl::new(config); |
| imp.start_handshake(hostname.into(), <span class="macro">vec!</span>[]); |
| ClientSession { imp } |
| } |
| |
| <span class="doccomment">/// Returns an `io::Write` implementor you can write bytes to |
| /// to send TLS1.3 early data (a.k.a. "0-RTT data") to the server. |
| /// |
| /// This returns None in many circumstances when the capability to |
| /// send early data is not available, including but not limited to: |
| /// |
| /// - The server hasn't been talked to previously. |
| /// - The server does not support resumption. |
| /// - The server does not support early data. |
| /// - The resumption data for the server has expired. |
| /// |
| /// The server specifies a maximum amount of early data. You can |
| /// learn this limit through the returned object, and writes through |
| /// it will process only this many bytes. |
| /// |
| /// The server can choose not to accept any sent early data -- |
| /// in this case the data is lost but the connection continues. You |
| /// can tell this happened using `is_early_data_accepted`. |
| </span><span class="kw">pub fn </span>early_data(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><WriteEarlyData> { |
| <span class="kw">if </span><span class="self">self</span>.imp.early_data.is_enabled() { |
| <span class="prelude-val">Some</span>(WriteEarlyData::new(<span class="kw-2">&mut </span><span class="self">self</span>.imp)) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="doccomment">/// Returns True if the server signalled it will process early data. |
| /// |
| /// If you sent early data and this returns false at the end of the |
| /// handshake then the server will not process the data. This |
| /// is not an error, but you may wish to resend the data. |
| </span><span class="kw">pub fn </span>is_early_data_accepted(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.imp.early_data.is_accepted() |
| } |
| } |
| |
| <span class="kw">impl </span>Session <span class="kw">for </span>ClientSession { |
| <span class="kw">fn </span>read_tls(<span class="kw-2">&mut </span><span class="self">self</span>, rd: <span class="kw-2">&mut </span><span class="kw">dyn </span>io::Read) -> io::Result<usize> { |
| <span class="self">self</span>.imp.common.read_tls(rd) |
| } |
| |
| <span class="doccomment">/// Writes TLS messages to `wr`. |
| </span><span class="kw">fn </span>write_tls(<span class="kw-2">&mut </span><span class="self">self</span>, wr: <span class="kw-2">&mut </span><span class="kw">dyn </span>io::Write) -> io::Result<usize> { |
| <span class="self">self</span>.imp.common.write_tls(wr) |
| } |
| |
| <span class="kw">fn </span>process_new_packets(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Result</span><(), TLSError> { |
| <span class="self">self</span>.imp.process_new_packets() |
| } |
| |
| <span class="kw">fn </span>wants_read(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.imp.wants_read() |
| } |
| |
| <span class="kw">fn </span>wants_write(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.imp.wants_write() |
| } |
| |
| <span class="kw">fn </span>is_handshaking(<span class="kw-2">&</span><span class="self">self</span>) -> bool { |
| <span class="self">self</span>.imp.is_handshaking() |
| } |
| |
| <span class="kw">fn </span>set_buffer_limit(<span class="kw-2">&mut </span><span class="self">self</span>, len: usize) { |
| <span class="self">self</span>.imp.set_buffer_limit(len) |
| } |
| |
| <span class="kw">fn </span>send_close_notify(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.imp.common.send_close_notify() |
| } |
| |
| <span class="kw">fn </span>get_peer_certificates(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Vec<key::Certificate>> { |
| <span class="self">self</span>.imp.get_peer_certificates() |
| } |
| |
| <span class="kw">fn </span>get_alpn_protocol(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>[u8]> { |
| <span class="self">self</span>.imp.get_alpn_protocol() |
| } |
| |
| <span class="kw">fn </span>get_protocol_version(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><ProtocolVersion> { |
| <span class="self">self</span>.imp.get_protocol_version() |
| } |
| |
| <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="self">self</span>.imp |
| .export_keying_material(output, label, context) |
| } |
| |
| <span class="kw">fn </span>get_negotiated_ciphersuite(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| <span class="self">self</span>.imp |
| .get_negotiated_ciphersuite() |
| .or(<span class="self">self</span>.imp.resumption_ciphersuite) |
| } |
| } |
| |
| <span class="kw">impl </span>io::Read <span class="kw">for </span>ClientSession { |
| <span class="doccomment">/// Obtain plaintext data received from the peer over this TLS connection. |
| /// |
| /// If the peer closes the TLS session cleanly, this fails with an error of |
| /// kind ErrorKind::ConnectionAborted once all the pending data has been read. |
| /// No further data can be received on that connection, so the underlying TCP |
| /// connection should closed too. |
| /// |
| /// Note that support close notify varies in peer TLS libraries: many do not |
| /// support it and uncleanly close the TCP connection (this might be |
| /// vulnerable to truncation attacks depending on the application protocol). |
| /// This means applications using rustls must both handle ErrorKind::ConnectionAborted |
| /// from this function, *and* unexpected closure of the underlying TCP connection. |
| </span><span class="kw">fn </span>read(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&mut </span>[u8]) -> io::Result<usize> { |
| <span class="self">self</span>.imp.common.read(buf) |
| } |
| } |
| |
| <span class="kw">impl </span>io::Write <span class="kw">for </span>ClientSession { |
| <span class="doccomment">/// Send the plaintext `buf` to the peer, encrypting |
| /// and authenticating it. Once this function succeeds |
| /// you should call `write_tls` which will output the |
| /// corresponding TLS records. |
| /// |
| /// This function buffers plaintext sent before the |
| /// TLS handshake completes, and sends it as soon |
| /// as it can. This buffer is of *unlimited size* so |
| /// writing much data before it can be sent will |
| /// cause excess memory usage. |
| </span><span class="kw">fn </span>write(<span class="kw-2">&mut </span><span class="self">self</span>, buf: <span class="kw-2">&</span>[u8]) -> io::Result<usize> { |
| <span class="prelude-val">Ok</span>(<span class="self">self</span>.imp.send_some_plaintext(buf)) |
| } |
| |
| <span class="kw">fn </span>write_vectored(<span class="kw-2">&mut </span><span class="self">self</span>, bufs: <span class="kw-2">&</span>[IoSlice<<span class="lifetime">'_</span>>]) -> io::Result<usize> { |
| <span class="kw">let </span><span class="kw-2">mut </span>sz = <span class="number">0</span>; |
| <span class="kw">for </span>buf <span class="kw">in </span>bufs { |
| sz += <span class="self">self</span>.imp.send_some_plaintext(buf); |
| } |
| <span class="prelude-val">Ok</span>(sz) |
| } |
| |
| <span class="kw">fn </span>flush(<span class="kw-2">&mut </span><span class="self">self</span>) -> io::Result<()> { |
| <span class="self">self</span>.imp.common.flush_plaintext(); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| </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> |
