| <!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/msgs/message.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>message.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>::msgs::alert::AlertMessagePayload; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::base::Payload; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::ccs::ChangeCipherSpecPayload; |
| <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::HandshakeType; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{AlertDescription, AlertLevel}; |
| <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::HandshakeMessagePayload; |
| |
| <span class="kw">use </span>std::mem; |
| |
| <span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub enum </span>MessagePayload { |
| Alert(AlertMessagePayload), |
| Handshake(HandshakeMessagePayload), |
| ChangeCipherSpec(ChangeCipherSpecPayload), |
| Opaque(Payload), |
| } |
| |
| <span class="kw">impl </span>MessagePayload { |
| <span class="kw">pub fn </span>encode(<span class="kw-2">&</span><span class="self">self</span>, bytes: <span class="kw-2">&mut </span>Vec<u8>) { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| MessagePayload::Alert(<span class="kw-2">ref </span>x) => x.encode(bytes), |
| MessagePayload::Handshake(<span class="kw-2">ref </span>x) => x.encode(bytes), |
| MessagePayload::ChangeCipherSpec(<span class="kw-2">ref </span>x) => x.encode(bytes), |
| MessagePayload::Opaque(<span class="kw-2">ref </span>x) => x.encode(bytes), |
| } |
| } |
| |
| <span class="kw">pub fn </span>decode_given_type( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| typ: ContentType, |
| vers: ProtocolVersion, |
| ) -> <span class="prelude-ty">Option</span><MessagePayload> { |
| <span class="kw">if let </span>MessagePayload::Opaque(<span class="kw-2">ref </span>payload) = <span class="kw-2">*</span><span class="self">self </span>{ |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Reader::init(<span class="kw-2">&</span>payload.<span class="number">0</span>); |
| <span class="kw">let </span>parsed = <span class="kw">match </span>typ { |
| ContentType::Alert => { |
| <span class="prelude-val">Some</span>(MessagePayload::Alert(AlertMessagePayload::read(<span class="kw-2">&mut </span>r)<span class="question-mark">?</span>)) |
| } |
| ContentType::Handshake => { |
| <span class="kw">let </span>p = HandshakeMessagePayload::read_version(<span class="kw-2">&mut </span>r, vers)<span class="question-mark">?</span>; |
| <span class="prelude-val">Some</span>(MessagePayload::Handshake(p)) |
| } |
| ContentType::ChangeCipherSpec => { |
| <span class="kw">let </span>p = ChangeCipherSpecPayload::read(<span class="kw-2">&mut </span>r)<span class="question-mark">?</span>; |
| <span class="prelude-val">Some</span>(MessagePayload::ChangeCipherSpec(p)) |
| } |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="kw">if </span>r.any_left() { <span class="prelude-val">None </span>} <span class="kw">else </span>{ parsed } |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">pub fn </span>length(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="kw">match </span><span class="kw-2">*</span><span class="self">self </span>{ |
| MessagePayload::Alert(<span class="kw-2">ref </span>x) => x.length(), |
| MessagePayload::Handshake(<span class="kw-2">ref </span>x) => x.length(), |
| MessagePayload::ChangeCipherSpec(<span class="kw-2">ref </span>x) => x.length(), |
| MessagePayload::Opaque(<span class="kw-2">ref </span>x) => x.<span class="number">0</span>.len(), |
| } |
| } |
| |
| <span class="kw">pub fn </span>new_opaque(data: Vec<u8>) -> MessagePayload { |
| MessagePayload::Opaque(Payload::new(data)) |
| } |
| } |
| |
| <span class="doccomment">/// A TLS frame, named TLSPlaintext in the standard. |
| /// This type owns all memory for its interior parts. |
| </span><span class="attribute">#[derive(Debug)] |
| </span><span class="kw">pub struct </span>Message { |
| <span class="kw">pub </span>typ: ContentType, |
| <span class="kw">pub </span>version: ProtocolVersion, |
| <span class="kw">pub </span>payload: MessagePayload, |
| } |
| |
| <span class="kw">impl </span>Message { |
| <span class="doccomment">/// This is the maximum on-the-wire size of a TLSCiphertext. |
| /// That's 2^14 payload bytes, a header, and a 2KB allowance |
| /// for ciphertext overheads. |
| </span><span class="kw">const </span>MAX_PAYLOAD: u16 = <span class="number">16384 </span>+ <span class="number">2048</span>; |
| |
| <span class="doccomment">/// Content type, version and size. |
| </span><span class="kw">const </span>HEADER_SIZE: u16 = <span class="number">1 </span>+ <span class="number">2 </span>+ <span class="number">2</span>; |
| |
| <span class="doccomment">/// Maximum on-wire message size. |
| </span><span class="kw">pub const </span>MAX_WIRE_SIZE: usize = (Message::MAX_PAYLOAD + Message::HEADER_SIZE) <span class="kw">as </span>usize; |
| } |
| |
| <span class="kw">impl </span>Codec <span class="kw">for </span>Message { |
| <span class="kw">fn </span>read(r: <span class="kw-2">&mut </span>Reader) -> <span class="prelude-ty">Option</span><Message> { |
| Message::read_with_detailed_error(r).ok() |
| } |
| |
| <span class="kw">fn </span>encode(<span class="kw-2">&</span><span class="self">self</span>, bytes: <span class="kw-2">&mut </span>Vec<u8>) { |
| <span class="self">self</span>.typ.encode(bytes); |
| <span class="self">self</span>.version.encode(bytes); |
| (<span class="self">self</span>.payload.length() <span class="kw">as </span>u16).encode(bytes); |
| <span class="self">self</span>.payload.encode(bytes); |
| } |
| } |
| |
| <span class="kw">pub enum </span>MessageError { |
| TooShortForHeader, |
| TooShortForLength, |
| IllegalLength, |
| IllegalContentType, |
| IllegalProtocolVersion, |
| } |
| |
| <span class="kw">impl </span>Message { |
| <span class="doccomment">/// Like Message::read(), but allows the important distinction between: |
| /// this message might be valid if we read more data; and this message will |
| /// never be valid. |
| </span><span class="kw">pub fn </span>read_with_detailed_error(r: <span class="kw-2">&mut </span>Reader) -> <span class="prelude-ty">Result</span><Message, MessageError> { |
| <span class="kw">let </span>typ = ContentType::read(r).ok_or(MessageError::TooShortForHeader)<span class="question-mark">?</span>; |
| <span class="kw">let </span>version = ProtocolVersion::read(r).ok_or(MessageError::TooShortForHeader)<span class="question-mark">?</span>; |
| <span class="kw">let </span>len = u16::read(r).ok_or(MessageError::TooShortForHeader)<span class="question-mark">?</span>; |
| |
| <span class="comment">// Reject oversize messages |
| </span><span class="kw">if </span>len >= Message::MAX_PAYLOAD { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(MessageError::IllegalLength); |
| } |
| |
| <span class="comment">// Don't accept any new content-types. |
| </span><span class="kw">if let </span>ContentType::Unknown(<span class="kw">_</span>) = typ { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(MessageError::IllegalContentType); |
| } |
| |
| <span class="comment">// Accept only versions 0x03XX for any XX. |
| </span><span class="kw">match </span>version { |
| ProtocolVersion::Unknown(<span class="kw-2">ref </span>v) <span class="kw">if </span>(v & <span class="number">0xff00</span>) != <span class="number">0x0300 </span>=> { |
| <span class="kw">return </span><span class="prelude-val">Err</span>(MessageError::IllegalProtocolVersion); |
| } |
| <span class="kw">_ </span>=> {} |
| }; |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>sub = r |
| .sub(len <span class="kw">as </span>usize) |
| .ok_or(MessageError::TooShortForLength)<span class="question-mark">?</span>; |
| <span class="kw">let </span>payload = Payload::read(<span class="kw-2">&mut </span>sub).unwrap(); |
| |
| <span class="prelude-val">Ok</span>(Message { |
| typ, |
| version, |
| payload: MessagePayload::Opaque(payload), |
| }) |
| } |
| |
| <span class="kw">pub fn </span>is_content_type(<span class="kw-2">&</span><span class="self">self</span>, typ: ContentType) -> bool { |
| <span class="self">self</span>.typ == typ |
| } |
| |
| <span class="kw">pub fn </span>is_handshake_type(<span class="kw-2">&</span><span class="self">self</span>, hstyp: HandshakeType) -> bool { |
| <span class="comment">// Bit of a layering violation, but OK. |
| </span><span class="kw">if let </span>MessagePayload::Handshake(<span class="kw-2">ref </span>hsp) = <span class="self">self</span>.payload { |
| hsp.typ == hstyp |
| } <span class="kw">else </span>{ |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="kw">pub fn </span>decode_payload(<span class="kw-2">&mut </span><span class="self">self</span>) -> bool { |
| <span class="comment">// Do we need a decode? |
| </span><span class="kw">if </span><span class="self">self</span>.typ == ContentType::ApplicationData { |
| <span class="kw">return </span><span class="bool-val">true</span>; |
| } |
| |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(x) = <span class="self">self |
| </span>.payload |
| .decode_given_type(<span class="self">self</span>.typ, <span class="self">self</span>.version) |
| { |
| <span class="self">self</span>.payload = x; |
| <span class="bool-val">true |
| </span>} <span class="kw">else </span>{ |
| <span class="bool-val">false |
| </span>} |
| } |
| |
| <span class="kw">pub fn </span>take_payload(<span class="self">self</span>) -> Vec<u8> { |
| <span class="self">self</span>.into_opaque() |
| .take_opaque_payload() |
| .unwrap() |
| .<span class="number">0 |
| </span>} |
| |
| <span class="kw">pub fn </span>take_opaque_payload(<span class="kw-2">&mut </span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><Payload> { |
| <span class="kw">if let </span>MessagePayload::Opaque(<span class="kw-2">ref mut </span>op) = <span class="self">self</span>.payload { |
| <span class="prelude-val">Some</span>(mem::replace(op, Payload::empty())) |
| } <span class="kw">else </span>{ |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">pub fn </span>into_opaque(<span class="self">self</span>) -> Message { |
| <span class="kw">if let </span>MessagePayload::Opaque(<span class="kw">_</span>) = <span class="self">self</span>.payload { |
| <span class="kw">return </span><span class="self">self</span>; |
| } |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>buf = Vec::new(); |
| <span class="self">self</span>.payload.encode(<span class="kw-2">&mut </span>buf); |
| |
| Message { |
| typ: <span class="self">self</span>.typ, |
| version: <span class="self">self</span>.version, |
| payload: MessagePayload::new_opaque(buf), |
| } |
| } |
| |
| <span class="kw">pub fn </span>build_alert(level: AlertLevel, desc: AlertDescription) -> Message { |
| Message { |
| typ: ContentType::Alert, |
| version: ProtocolVersion::TLSv1_2, |
| payload: MessagePayload::Alert(AlertMessagePayload { |
| level, |
| description: desc, |
| }), |
| } |
| } |
| |
| <span class="kw">pub fn </span>build_key_update_notify() -> Message { |
| Message { |
| typ: ContentType::Handshake, |
| version: ProtocolVersion::TLSv1_3, |
| payload: MessagePayload::Handshake(HandshakeMessagePayload::build_key_update_notify()), |
| } |
| } |
| } |
| |
| <span class="kw">impl</span><<span class="lifetime">'a</span>> Message { |
| <span class="kw">pub fn </span>to_borrowed(<span class="kw-2">&</span><span class="lifetime">'a </span><span class="self">self</span>) -> BorrowMessage<<span class="lifetime">'a</span>> { |
| <span class="kw">if let </span>MessagePayload::Opaque(<span class="kw-2">ref </span>p) = <span class="self">self</span>.payload { |
| BorrowMessage { |
| typ: <span class="self">self</span>.typ, |
| version: <span class="self">self</span>.version, |
| payload: <span class="kw-2">&</span>p.<span class="number">0</span>, |
| } |
| } <span class="kw">else </span>{ |
| <span class="macro">unreachable!</span>(<span class="string">"to_borrowed must have opaque message"</span>); |
| } |
| } |
| } |
| |
| <span class="doccomment">/// A TLS frame, named TLSPlaintext in the standard. |
| /// |
| /// This type differs from `Message` because it borrows |
| /// its payload. You can make a `Message` from an |
| /// `BorrowMessage`, but this involves a copy. |
| /// |
| /// This type also cannot decode its internals and |
| /// is not a `Codec` type, only `Message` can do that. |
| </span><span class="kw">pub struct </span>BorrowMessage<<span class="lifetime">'a</span>> { |
| <span class="kw">pub </span>typ: ContentType, |
| <span class="kw">pub </span>version: ProtocolVersion, |
| <span class="kw">pub </span>payload: <span class="kw-2">&</span><span class="lifetime">'a </span>[u8], |
| } |
| </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> |
