| <!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/suites.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>suites.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>::cipher; |
| <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::{CipherSuite, HashAlgorithm, SignatureAlgorithm, SignatureScheme}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::{NamedGroup, ProtocolVersion}; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::DecomposedSignatureScheme; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::KeyExchangeAlgorithm; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::handshake::{ClientECDHParams, ServerECDHParams}; |
| |
| <span class="kw">use </span>ring; |
| <span class="kw">use </span>std::fmt; |
| |
| <span class="doccomment">/// Bulk symmetric encryption scheme used by a cipher suite. |
| </span><span class="attribute">#[allow(non_camel_case_types)] |
| #[derive(Debug, PartialEq)] |
| </span><span class="kw">pub enum </span>BulkAlgorithm { |
| <span class="doccomment">/// AES with 128-bit keys in Galois counter mode. |
| </span>AES_128_GCM, |
| |
| <span class="doccomment">/// AES with 256-bit keys in Galois counter mode. |
| </span>AES_256_GCM, |
| |
| <span class="doccomment">/// Chacha20 for confidentiality with poly1305 for authenticity. |
| </span>CHACHA20_POLY1305, |
| } |
| |
| <span class="doccomment">/// The result of a key exchange. This has our public key, |
| /// and the agreed shared secret (also known as the "premaster secret" |
| /// in TLS1.0-era protocols, and "Z" in TLS1.3). |
| </span><span class="kw">pub struct </span>KeyExchangeResult { |
| <span class="kw">pub </span>pubkey: ring::agreement::PublicKey, |
| <span class="kw">pub </span>shared_secret: Vec<u8>, |
| } |
| |
| <span class="doccomment">/// An in-progress key exchange. This has the algorithm, |
| /// our private key, and our public key. |
| </span><span class="kw">pub struct </span>KeyExchange { |
| <span class="kw">pub </span>group: NamedGroup, |
| alg: <span class="kw-2">&</span><span class="lifetime">'static </span>ring::agreement::Algorithm, |
| privkey: ring::agreement::EphemeralPrivateKey, |
| <span class="kw">pub </span>pubkey: ring::agreement::PublicKey, |
| } |
| |
| <span class="kw">impl </span>KeyExchange { |
| <span class="kw">pub fn </span>named_group_to_ecdh_alg( |
| group: NamedGroup, |
| ) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>ring::agreement::Algorithm> { |
| <span class="kw">match </span>group { |
| NamedGroup::X25519 => <span class="prelude-val">Some</span>(<span class="kw-2">&</span>ring::agreement::X25519), |
| NamedGroup::secp256r1 => <span class="prelude-val">Some</span>(<span class="kw-2">&</span>ring::agreement::ECDH_P256), |
| NamedGroup::secp384r1 => <span class="prelude-val">Some</span>(<span class="kw-2">&</span>ring::agreement::ECDH_P384), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="kw">pub fn </span>supported_groups() -> <span class="kw-2">&</span><span class="lifetime">'static </span>[NamedGroup] { |
| <span class="comment">// in preference order |
| </span><span class="kw-2">&</span>[ |
| NamedGroup::X25519, |
| NamedGroup::secp384r1, |
| NamedGroup::secp256r1, |
| ] |
| } |
| |
| <span class="kw">pub fn </span>client_ecdhe(kx_params: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><KeyExchangeResult> { |
| <span class="kw">let </span><span class="kw-2">mut </span>rd = Reader::init(kx_params); |
| <span class="kw">let </span>ecdh_params = ServerECDHParams::read(<span class="kw-2">&mut </span>rd)<span class="question-mark">?</span>; |
| |
| KeyExchange::start_ecdhe(ecdh_params.curve_params.named_group)<span class="question-mark">? |
| </span>.complete(<span class="kw-2">&</span>ecdh_params.public.<span class="number">0</span>) |
| } |
| |
| <span class="kw">pub fn </span>start_ecdhe(named_group: NamedGroup) -> <span class="prelude-ty">Option</span><KeyExchange> { |
| <span class="kw">let </span>alg = KeyExchange::named_group_to_ecdh_alg(named_group)<span class="question-mark">?</span>; |
| <span class="kw">let </span>rng = ring::rand::SystemRandom::new(); |
| <span class="kw">let </span>ours = ring::agreement::EphemeralPrivateKey::generate(alg, <span class="kw-2">&</span>rng).unwrap(); |
| |
| <span class="kw">let </span>pubkey = ours.compute_public_key().unwrap(); |
| |
| <span class="prelude-val">Some</span>(KeyExchange { |
| group: named_group, |
| alg, |
| privkey: ours, |
| pubkey, |
| }) |
| } |
| |
| <span class="kw">pub fn </span>check_client_params(<span class="kw-2">&</span><span class="self">self</span>, kx_params: <span class="kw-2">&</span>[u8]) -> bool { |
| <span class="self">self</span>.decode_client_params(kx_params) |
| .is_some() |
| } |
| |
| <span class="kw">fn </span>decode_client_params(<span class="kw-2">&</span><span class="self">self</span>, kx_params: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><ClientECDHParams> { |
| <span class="kw">let </span><span class="kw-2">mut </span>rd = Reader::init(kx_params); |
| <span class="kw">let </span>ecdh_params = ClientECDHParams::read(<span class="kw-2">&mut </span>rd)<span class="question-mark">?</span>; |
| <span class="kw">if </span>rd.any_left() { |
| <span class="prelude-val">None |
| </span>} <span class="kw">else </span>{ |
| <span class="prelude-val">Some</span>(ecdh_params) |
| } |
| } |
| |
| <span class="kw">pub fn </span>server_complete(<span class="self">self</span>, kx_params: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><KeyExchangeResult> { |
| <span class="self">self</span>.decode_client_params(kx_params) |
| .and_then(|ecdh| <span class="self">self</span>.complete(<span class="kw-2">&</span>ecdh.public.<span class="number">0</span>)) |
| } |
| |
| <span class="kw">pub fn </span>complete(<span class="self">self</span>, peer: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><KeyExchangeResult> { |
| <span class="kw">let </span>peer_key = ring::agreement::UnparsedPublicKey::new(<span class="self">self</span>.alg, peer); |
| <span class="kw">let </span>secret = ring::agreement::agree_ephemeral(<span class="self">self</span>.privkey, <span class="kw-2">&</span>peer_key, (), |v| { |
| <span class="kw">let </span><span class="kw-2">mut </span>r = Vec::new(); |
| r.extend_from_slice(v); |
| <span class="prelude-val">Ok</span>(r) |
| }); |
| |
| <span class="kw">if </span>secret.is_err() { |
| <span class="kw">return </span><span class="prelude-val">None</span>; |
| } |
| |
| <span class="prelude-val">Some</span>(KeyExchangeResult { |
| pubkey: <span class="self">self</span>.pubkey, |
| shared_secret: secret.unwrap(), |
| }) |
| } |
| } |
| |
| <span class="doccomment">/// A cipher suite supported by rustls. |
| /// |
| /// All possible instances of this class are provided by the library in |
| /// the `ALL_CIPHERSUITES` array. |
| </span><span class="kw">pub struct </span>SupportedCipherSuite { |
| <span class="doccomment">/// The TLS enumeration naming this cipher suite. |
| </span><span class="kw">pub </span>suite: CipherSuite, |
| |
| <span class="doccomment">/// How to exchange/agree keys. |
| </span><span class="kw">pub </span>kx: KeyExchangeAlgorithm, |
| |
| <span class="doccomment">/// How to do bulk encryption. |
| </span><span class="kw">pub </span>bulk: BulkAlgorithm, |
| |
| <span class="doccomment">/// How to do hashing. |
| </span><span class="kw">pub </span>hash: HashAlgorithm, |
| |
| <span class="doccomment">/// How to sign messages for authentication. |
| /// |
| /// This is not present for TLS1.3, because authentication is orthogonal |
| /// to the ciphersuite concept there. |
| </span><span class="kw">pub </span>sign: <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>[SignatureScheme]>, |
| |
| <span class="doccomment">/// Encryption key length, for the bulk algorithm. |
| </span><span class="kw">pub </span>enc_key_len: usize, |
| |
| <span class="doccomment">/// How long the fixed part of the 'IV' is. |
| /// |
| /// This isn't usually an IV, but we continue the |
| /// terminology misuse to match the standard. |
| </span><span class="kw">pub </span>fixed_iv_len: usize, |
| |
| <span class="doccomment">/// This is a non-standard extension which extends the |
| /// key block to provide an initial explicit nonce offset, |
| /// in a deterministic and safe way. GCM needs this, |
| /// chacha20poly1305 works this way by design. |
| </span><span class="kw">pub </span>explicit_nonce_len: usize, |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) hkdf_algorithm: ring::hkdf::Algorithm, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) aead_algorithm: <span class="kw-2">&</span><span class="lifetime">'static </span>ring::aead::Algorithm, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) build_tls12_encrypter: <span class="prelude-ty">Option</span><cipher::BuildTLS12Encrypter>, |
| <span class="kw">pub</span>(<span class="kw">crate</span>) build_tls12_decrypter: <span class="prelude-ty">Option</span><cipher::BuildTLS12Decrypter>, |
| } |
| |
| <span class="kw">impl </span>PartialEq <span class="kw">for </span>SupportedCipherSuite { |
| <span class="kw">fn </span>eq(<span class="kw-2">&</span><span class="self">self</span>, other: <span class="kw-2">&</span>SupportedCipherSuite) -> bool { |
| <span class="self">self</span>.suite == other.suite |
| } |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>SupportedCipherSuite { |
| <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<<span class="lifetime">'_</span>>) -> fmt::Result { |
| f.debug_struct(<span class="string">"SupportedCipherSuite"</span>) |
| .field(<span class="string">"suite"</span>, <span class="kw-2">&</span><span class="self">self</span>.suite) |
| .field(<span class="string">"kx"</span>, <span class="kw-2">&</span><span class="self">self</span>.kx) |
| .field(<span class="string">"bulk"</span>, <span class="kw-2">&</span><span class="self">self</span>.bulk) |
| .field(<span class="string">"hash"</span>, <span class="kw-2">&</span><span class="self">self</span>.hash) |
| .field(<span class="string">"sign"</span>, <span class="kw-2">&</span><span class="self">self</span>.sign) |
| .field(<span class="string">"enc_key_len"</span>, <span class="kw-2">&</span><span class="self">self</span>.enc_key_len) |
| .field(<span class="string">"fixed_iv_len"</span>, <span class="kw-2">&</span><span class="self">self</span>.fixed_iv_len) |
| .field(<span class="string">"explicit_nonce_len"</span>, <span class="kw-2">&</span><span class="self">self</span>.explicit_nonce_len) |
| .finish() |
| } |
| } |
| |
| <span class="kw">impl </span>SupportedCipherSuite { |
| <span class="doccomment">/// Which hash function to use with this suite. |
| </span><span class="kw">pub fn </span>get_hash(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span><span class="lifetime">'static </span>ring::digest::Algorithm { |
| <span class="self">self</span>.hkdf_algorithm |
| .hmac_algorithm() |
| .digest_algorithm() |
| } |
| |
| <span class="doccomment">/// We have parameters and a verified public key in `kx_params`. |
| /// Generate an ephemeral key, generate the shared secret, and |
| /// return it and the public half in a `KeyExchangeResult`. |
| </span><span class="kw">pub fn </span>do_client_kx(<span class="kw-2">&</span><span class="self">self</span>, kx_params: <span class="kw-2">&</span>[u8]) -> <span class="prelude-ty">Option</span><KeyExchangeResult> { |
| <span class="kw">match </span><span class="self">self</span>.kx { |
| KeyExchangeAlgorithm::ECDHE => KeyExchange::client_ecdhe(kx_params), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Start the KX process with the given group. This generates |
| /// the server's share, but we don't yet have the client's share. |
| </span><span class="kw">pub fn </span>start_server_kx(<span class="kw-2">&</span><span class="self">self</span>, named_group: NamedGroup) -> <span class="prelude-ty">Option</span><KeyExchange> { |
| <span class="kw">match </span><span class="self">self</span>.kx { |
| KeyExchangeAlgorithm::ECDHE => KeyExchange::start_ecdhe(named_group), |
| <span class="kw">_ </span>=> <span class="prelude-val">None</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Resolve the set of supported `SignatureScheme`s from the |
| /// offered `SupportedSignatureSchemes`. If we return an empty |
| /// set, the handshake terminates. |
| </span><span class="kw">pub fn </span>resolve_sig_schemes(<span class="kw-2">&</span><span class="self">self</span>, offered: <span class="kw-2">&</span>[SignatureScheme]) -> Vec<SignatureScheme> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(our_preference) = <span class="self">self</span>.sign { |
| our_preference |
| .iter() |
| .filter(|pref| offered.contains(pref)) |
| .cloned() |
| .collect() |
| } <span class="kw">else </span>{ |
| <span class="macro">vec!</span>[] |
| } |
| } |
| |
| <span class="doccomment">/// Length of key block that needs to be output by the key |
| /// derivation phase for this suite. |
| </span><span class="kw">pub fn </span>key_block_len(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| (<span class="self">self</span>.enc_key_len + <span class="self">self</span>.fixed_iv_len) * <span class="number">2 </span>+ <span class="self">self</span>.explicit_nonce_len |
| } |
| |
| <span class="doccomment">/// Return true if this suite is usable for TLS `version`. |
| </span><span class="kw">pub fn </span>usable_for_version(<span class="kw-2">&</span><span class="self">self</span>, version: ProtocolVersion) -> bool { |
| <span class="kw">match </span>version { |
| ProtocolVersion::TLSv1_3 => <span class="self">self</span>.build_tls12_encrypter.is_none(), |
| ProtocolVersion::TLSv1_2 => <span class="self">self</span>.build_tls12_encrypter.is_some(), |
| <span class="kw">_ </span>=> <span class="bool-val">false</span>, |
| } |
| } |
| |
| <span class="doccomment">/// Return true if this suite is usable for a key only offering `sigalg` |
| /// signatures. This resolves to true for all TLS1.3 suites. |
| </span><span class="kw">pub fn </span>usable_for_sigalg(<span class="kw-2">&</span><span class="self">self</span>, sigalg: SignatureAlgorithm) -> bool { |
| <span class="kw">match </span><span class="self">self</span>.sign { |
| <span class="prelude-val">None </span>=> <span class="bool-val">true</span>, <span class="comment">// no constraint expressed by ciphersuite (eg, TLS1.3) |
| </span><span class="prelude-val">Some</span>(schemes) => schemes |
| .iter() |
| .any(|scheme| scheme.sign() == sigalg), |
| } |
| } |
| |
| <span class="doccomment">/// Can a session using suite self resume using suite new_suite? |
| </span><span class="kw">pub fn </span>can_resume_to(<span class="kw-2">&</span><span class="self">self</span>, new_suite: <span class="kw-2">&</span>SupportedCipherSuite) -> bool { |
| <span class="kw">if </span><span class="self">self</span>.usable_for_version(ProtocolVersion::TLSv1_3) |
| && new_suite.usable_for_version(ProtocolVersion::TLSv1_3) |
| { |
| <span class="comment">// TLS1.3 actually specifies requirements here: suites are compatible |
| // for resumption if they have the same KDF hash |
| </span><span class="self">self</span>.hash == new_suite.hash |
| } <span class="kw">else if </span><span class="self">self</span>.usable_for_version(ProtocolVersion::TLSv1_2) |
| && new_suite.usable_for_version(ProtocolVersion::TLSv1_2) |
| { |
| <span class="comment">// Previous versions don't specify any constraint, so we don't |
| // resume between suites to avoid bad interactions. |
| </span><span class="self">self</span>.suite == new_suite.suite |
| } <span class="kw">else </span>{ |
| <span class="comment">// Suites for different versions definitely can't resume! |
| </span><span class="bool-val">false |
| </span>} |
| } |
| } |
| |
| <span class="kw">static </span>TLS12_ECDSA_SCHEMES: <span class="kw-2">&</span>[SignatureScheme] = <span class="kw-2">&</span>[ |
| SignatureScheme::ED25519, |
| SignatureScheme::ECDSA_NISTP521_SHA512, |
| SignatureScheme::ECDSA_NISTP384_SHA384, |
| SignatureScheme::ECDSA_NISTP256_SHA256, |
| ]; |
| |
| <span class="kw">static </span>TLS12_RSA_SCHEMES: <span class="kw-2">&</span>[SignatureScheme] = <span class="kw-2">&</span>[ |
| SignatureScheme::RSA_PSS_SHA512, |
| SignatureScheme::RSA_PSS_SHA384, |
| SignatureScheme::RSA_PSS_SHA256, |
| SignatureScheme::RSA_PKCS1_SHA512, |
| SignatureScheme::RSA_PKCS1_SHA384, |
| SignatureScheme::RSA_PKCS1_SHA256, |
| ]; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256. |
| </span><span class="kw">pub static </span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256: SupportedCipherSuite = |
| SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_ECDSA_SCHEMES), |
| bulk: BulkAlgorithm::CHACHA20_POLY1305, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">12</span>, |
| explicit_nonce_len: <span class="number">0</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::CHACHA20_POLY1305, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_chacha_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_chacha_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 |
| </span><span class="kw">pub static </span>TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256: SupportedCipherSuite = |
| SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_RSA_SCHEMES), |
| bulk: BulkAlgorithm::CHACHA20_POLY1305, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">12</span>, |
| explicit_nonce_len: <span class="number">0</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::CHACHA20_POLY1305, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_chacha_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_chacha_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 |
| </span><span class="kw">pub static </span>TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_RSA_SCHEMES), |
| bulk: BulkAlgorithm::AES_128_GCM, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">16</span>, |
| fixed_iv_len: <span class="number">4</span>, |
| explicit_nonce_len: <span class="number">8</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_128_GCM, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_128_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_128_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 |
| </span><span class="kw">pub static </span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_RSA_SCHEMES), |
| bulk: BulkAlgorithm::AES_256_GCM, |
| hash: HashAlgorithm::SHA384, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">4</span>, |
| explicit_nonce_len: <span class="number">8</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA384, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_256_GCM, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_256_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_256_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 |
| </span><span class="kw">pub static </span>TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_ECDSA_SCHEMES), |
| bulk: BulkAlgorithm::AES_128_GCM, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">16</span>, |
| fixed_iv_len: <span class="number">4</span>, |
| explicit_nonce_len: <span class="number">8</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_128_GCM, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_128_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_128_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.2 ciphersuite TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 |
| </span><span class="kw">pub static </span>TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, |
| kx: KeyExchangeAlgorithm::ECDHE, |
| sign: <span class="prelude-val">Some</span>(TLS12_ECDSA_SCHEMES), |
| bulk: BulkAlgorithm::AES_256_GCM, |
| hash: HashAlgorithm::SHA384, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">4</span>, |
| explicit_nonce_len: <span class="number">8</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA384, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_256_GCM, |
| build_tls12_encrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_256_encrypter), |
| build_tls12_decrypter: <span class="prelude-val">Some</span>(cipher::build_tls12_gcm_256_decrypter), |
| }; |
| |
| <span class="doccomment">/// The TLS1.3 ciphersuite TLS_CHACHA20_POLY1305_SHA256 |
| </span><span class="kw">pub static </span>TLS13_CHACHA20_POLY1305_SHA256: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS13_CHACHA20_POLY1305_SHA256, |
| kx: KeyExchangeAlgorithm::BulkOnly, |
| sign: <span class="prelude-val">None</span>, |
| bulk: BulkAlgorithm::CHACHA20_POLY1305, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">12</span>, |
| explicit_nonce_len: <span class="number">0</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::CHACHA20_POLY1305, |
| build_tls12_encrypter: <span class="prelude-val">None</span>, |
| build_tls12_decrypter: <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="doccomment">/// The TLS1.3 ciphersuite TLS_AES_256_GCM_SHA384 |
| </span><span class="kw">pub static </span>TLS13_AES_256_GCM_SHA384: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS13_AES_256_GCM_SHA384, |
| kx: KeyExchangeAlgorithm::BulkOnly, |
| sign: <span class="prelude-val">None</span>, |
| bulk: BulkAlgorithm::AES_256_GCM, |
| hash: HashAlgorithm::SHA384, |
| enc_key_len: <span class="number">32</span>, |
| fixed_iv_len: <span class="number">12</span>, |
| explicit_nonce_len: <span class="number">0</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA384, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_256_GCM, |
| build_tls12_encrypter: <span class="prelude-val">None</span>, |
| build_tls12_decrypter: <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="doccomment">/// The TLS1.3 ciphersuite TLS_AES_128_GCM_SHA256 |
| </span><span class="kw">pub static </span>TLS13_AES_128_GCM_SHA256: SupportedCipherSuite = SupportedCipherSuite { |
| suite: CipherSuite::TLS13_AES_128_GCM_SHA256, |
| kx: KeyExchangeAlgorithm::BulkOnly, |
| sign: <span class="prelude-val">None</span>, |
| bulk: BulkAlgorithm::AES_128_GCM, |
| hash: HashAlgorithm::SHA256, |
| enc_key_len: <span class="number">16</span>, |
| fixed_iv_len: <span class="number">12</span>, |
| explicit_nonce_len: <span class="number">0</span>, |
| hkdf_algorithm: ring::hkdf::HKDF_SHA256, |
| aead_algorithm: <span class="kw-2">&</span>ring::aead::AES_128_GCM, |
| build_tls12_encrypter: <span class="prelude-val">None</span>, |
| build_tls12_decrypter: <span class="prelude-val">None</span>, |
| }; |
| |
| <span class="doccomment">/// A list of all the cipher suites supported by rustls. |
| </span><span class="kw">pub static </span>ALL_CIPHERSUITES: [<span class="kw-2">&</span>SupportedCipherSuite; <span class="number">9</span>] = [ |
| <span class="comment">// TLS1.3 suites |
| </span><span class="kw-2">&</span>TLS13_CHACHA20_POLY1305_SHA256, |
| <span class="kw-2">&</span>TLS13_AES_256_GCM_SHA384, |
| <span class="kw-2">&</span>TLS13_AES_128_GCM_SHA256, |
| <span class="comment">// TLS1.2 suites |
| </span><span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, |
| <span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, |
| <span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| ]; |
| |
| <span class="comment">// These both O(N^2)! |
| </span><span class="kw">pub fn </span>choose_ciphersuite_preferring_client( |
| client_suites: <span class="kw-2">&</span>[CipherSuite], |
| server_suites: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite], |
| ) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| <span class="kw">for </span>client_suite <span class="kw">in </span>client_suites { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(selected) = server_suites |
| .iter() |
| .find(|x| <span class="kw-2">*</span>client_suite == x.suite) |
| { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(<span class="kw-2">*</span>selected); |
| } |
| } |
| |
| <span class="prelude-val">None |
| </span>} |
| |
| <span class="kw">pub fn </span>choose_ciphersuite_preferring_server( |
| client_suites: <span class="kw-2">&</span>[CipherSuite], |
| server_suites: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite], |
| ) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| <span class="kw">if let </span><span class="prelude-val">Some</span>(selected) = server_suites |
| .iter() |
| .find(|x| client_suites.contains(<span class="kw-2">&</span>x.suite)) |
| { |
| <span class="kw">return </span><span class="prelude-val">Some</span>(<span class="kw-2">*</span>selected); |
| } |
| |
| <span class="prelude-val">None |
| </span>} |
| |
| <span class="doccomment">/// Return a list of the ciphersuites in `all` with the suites |
| /// incompatible with `SignatureAlgorithm` `sigalg` removed. |
| </span><span class="kw">pub fn </span>reduce_given_sigalg( |
| all: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite], |
| sigalg: SignatureAlgorithm, |
| ) -> Vec<<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| all.iter() |
| .filter(|&&suite| suite.usable_for_sigalg(sigalg)) |
| .cloned() |
| .collect() |
| } |
| |
| <span class="doccomment">/// Return a list of the ciphersuites in `all` with the suites |
| /// incompatible with the chosen `version` removed. |
| </span><span class="kw">pub fn </span>reduce_given_version( |
| all: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite], |
| version: ProtocolVersion, |
| ) -> Vec<<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite> { |
| all.iter() |
| .filter(|&&suite| suite.usable_for_version(version)) |
| .cloned() |
| .collect() |
| } |
| |
| <span class="doccomment">/// Return true if `sigscheme` is usable by any of the given suites. |
| </span><span class="kw">pub fn </span>compatible_sigscheme_for_suites( |
| sigscheme: SignatureScheme, |
| common_suites: <span class="kw-2">&</span>[<span class="kw-2">&</span><span class="lifetime">'static </span>SupportedCipherSuite], |
| ) -> bool { |
| <span class="kw">let </span>sigalg = sigscheme.sign(); |
| common_suites |
| .iter() |
| .any(|<span class="kw-2">&</span>suite| suite.usable_for_sigalg(sigalg)) |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>test { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::msgs::enums::CipherSuite; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_client_pref() { |
| <span class="kw">let </span>client = <span class="macro">vec!</span>[ |
| CipherSuite::TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| CipherSuite::TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| ]; |
| <span class="kw">let </span>server = <span class="macro">vec!</span>[ |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| ]; |
| <span class="kw">let </span>chosen = choose_ciphersuite_preferring_client(<span class="kw-2">&</span>client, <span class="kw-2">&</span>server); |
| <span class="macro">assert!</span>(chosen.is_some()); |
| <span class="macro">assert_eq!</span>(chosen.unwrap(), <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_server_pref() { |
| <span class="kw">let </span>client = <span class="macro">vec!</span>[ |
| CipherSuite::TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| CipherSuite::TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| ]; |
| <span class="kw">let </span>server = <span class="macro">vec!</span>[ |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, |
| <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, |
| ]; |
| <span class="kw">let </span>chosen = choose_ciphersuite_preferring_server(<span class="kw-2">&</span>client, <span class="kw-2">&</span>server); |
| <span class="macro">assert!</span>(chosen.is_some()); |
| <span class="macro">assert_eq!</span>(chosen.unwrap(), <span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_pref_fails() { |
| <span class="macro">assert!</span>( |
| choose_ciphersuite_preferring_client( |
| <span class="kw-2">&</span>[CipherSuite::TLS_NULL_WITH_NULL_NULL], |
| <span class="kw-2">&</span>ALL_CIPHERSUITES |
| ) |
| .is_none() |
| ); |
| <span class="macro">assert!</span>( |
| choose_ciphersuite_preferring_server( |
| <span class="kw-2">&</span>[CipherSuite::TLS_NULL_WITH_NULL_NULL], |
| <span class="kw-2">&</span>ALL_CIPHERSUITES |
| ) |
| .is_none() |
| ); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_scs_is_debug() { |
| <span class="macro">println!</span>(<span class="string">"{:?}"</span>, ALL_CIPHERSUITES); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_usable_for_version() { |
| <span class="kw">fn </span>ok_tls13(scs: <span class="kw-2">&</span>SupportedCipherSuite) { |
| <span class="macro">assert!</span>(!scs.usable_for_version(ProtocolVersion::TLSv1_0)); |
| <span class="macro">assert!</span>(!scs.usable_for_version(ProtocolVersion::TLSv1_2)); |
| <span class="macro">assert!</span>(scs.usable_for_version(ProtocolVersion::TLSv1_3)); |
| } |
| |
| <span class="kw">fn </span>ok_tls12(scs: <span class="kw-2">&</span>SupportedCipherSuite) { |
| <span class="macro">assert!</span>(!scs.usable_for_version(ProtocolVersion::TLSv1_0)); |
| <span class="macro">assert!</span>(scs.usable_for_version(ProtocolVersion::TLSv1_2)); |
| <span class="macro">assert!</span>(!scs.usable_for_version(ProtocolVersion::TLSv1_3)); |
| } |
| |
| ok_tls13(<span class="kw-2">&</span>TLS13_CHACHA20_POLY1305_SHA256); |
| ok_tls13(<span class="kw-2">&</span>TLS13_AES_256_GCM_SHA384); |
| ok_tls13(<span class="kw-2">&</span>TLS13_AES_128_GCM_SHA256); |
| |
| ok_tls12(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256); |
| ok_tls12(<span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256); |
| ok_tls12(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384); |
| ok_tls12(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256); |
| ok_tls12(<span class="kw-2">&</span>TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_can_resume_to() { |
| <span class="macro">assert!</span>(TLS13_CHACHA20_POLY1305_SHA256.can_resume_to(<span class="kw-2">&</span>TLS13_AES_128_GCM_SHA256)); |
| <span class="macro">assert!</span>(!TLS13_CHACHA20_POLY1305_SHA256.can_resume_to(<span class="kw-2">&</span>TLS13_AES_256_GCM_SHA384)); |
| <span class="macro">assert!</span>( |
| !TLS13_CHACHA20_POLY1305_SHA256 |
| .can_resume_to(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256) |
| ); |
| <span class="macro">assert!</span>( |
| !TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 |
| .can_resume_to(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256) |
| ); |
| <span class="macro">assert!</span>( |
| TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 |
| .can_resume_to(<span class="kw-2">&</span>TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256) |
| ); |
| } |
| } |
| </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> |
