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tls: add missing stats for signature algorithms. (#14703) #14955

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Feb 5, 2021
Merged

tls: add missing stats for signature algorithms. (#14703) #14955

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43 changes: 32 additions & 11 deletions source/extensions/transport_sockets/tls/context_impl.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -464,30 +464,51 @@ ContextImpl::ContextImpl(Stats::Scope& scope, const Envoy::Ssl::ContextConfig& c
parsed_alpn_protocols_ = parseAlpnProtocols(config.alpnProtocols());

// Use the SSL library to iterate over the configured ciphers.
//
// Note that if a negotiated cipher suite is outside of this set, we'll issue an ENVOY_BUG.
for (TlsContext& tls_context : tls_contexts_) {
for (const SSL_CIPHER* cipher : SSL_CTX_get_ciphers(tls_context.ssl_ctx_.get())) {
stat_name_set_->rememberBuiltin(SSL_CIPHER_get_name(cipher));
}
}

// Add hardcoded cipher suites from the TLS 1.3 spec:
// Add supported cipher suites from the TLS 1.3 spec:
// https://tools.ietf.org/html/rfc8446#appendix-B.4
// AES-CCM cipher suites are removed (no BoringSSL support).
//
// Note that if a negotiated cipher suite is outside of this set, we'll issue an ENVOY_BUG.
stat_name_set_->rememberBuiltins(
{"TLS_AES_128_GCM_SHA256", "TLS_AES_256_GCM_SHA384", "TLS_CHACHA20_POLY1305_SHA256"});

// Curves from
// https://github.com/google/boringssl/blob/f4d8b969200f1ee2dd872ffb85802e6a0976afe7/ssl/ssl_key_share.cc#L384
// All supported curves. Source:
// https://github.com/google/boringssl/blob/3743aafdacff2f7b083615a043a37101f740fa53/ssl/ssl_key_share.cc#L302-L309
//
// Note that if a curve is configured outside this set, we'll issue an ENVOY_BUG so
// it will hopefully be caught.
stat_name_set_->rememberBuiltins(
{"P-224", "P-256", "P-384", "P-521", "X25519", "CECPQ2", "CECPQ2b"});
// Note that if a negotiated curve is outside of this set, we'll issue an ENVOY_BUG.
stat_name_set_->rememberBuiltins({"P-224", "P-256", "P-384", "P-521", "X25519", "CECPQ2"});

// Algorithms
stat_name_set_->rememberBuiltins({"ecdsa_secp256r1_sha256", "rsa_pss_rsae_sha256"});

// Versions
// All supported signature algorithms. Source:
// https://github.com/google/boringssl/blob/3743aafdacff2f7b083615a043a37101f740fa53/ssl/ssl_privkey.cc#L436-L453
//
// Note that if a negotiated algorithm is outside of this set, we'll issue an ENVOY_BUG.
stat_name_set_->rememberBuiltins({
"rsa_pkcs1_md5_sha1",
"rsa_pkcs1_sha1",
"rsa_pkcs1_sha256",
"rsa_pkcs1_sha384",
"rsa_pkcs1_sha512",
"ecdsa_sha1",
"ecdsa_secp256r1_sha256",
"ecdsa_secp384r1_sha384",
"ecdsa_secp521r1_sha512",
"rsa_pss_rsae_sha256",
"rsa_pss_rsae_sha384",
"rsa_pss_rsae_sha512",
"ed25519",
});

// All supported protocol versions.
//
// Note that if a negotiated version is outside of this set, we'll issue an ENVOY_BUG.
stat_name_set_->rememberBuiltins({"TLSv1", "TLSv1.1", "TLSv1.2", "TLSv1.3"});
}

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