mirror of
https://github.com/caddyserver/caddy.git
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116 lines
4.4 KiB
Go
116 lines
4.4 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package caddytls
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import (
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"crypto/tls"
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"crypto/x509"
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"github.com/klauspost/cpuid"
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)
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// supportedCipherSuites is the unordered map of cipher suite
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// string names to their definition in crypto/tls.
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// TODO: might not be needed much longer, see:
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// https://github.com/golang/go/issues/30325
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var supportedCipherSuites = map[string]uint16{
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"ECDHE_ECDSA_AES256_GCM_SHA384": tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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"ECDHE_RSA_AES256_GCM_SHA384": tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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"ECDHE_ECDSA_AES128_GCM_SHA256": tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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"ECDHE_RSA_AES128_GCM_SHA256": tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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"ECDHE_ECDSA_WITH_CHACHA20_POLY1305": tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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"ECDHE_RSA_WITH_CHACHA20_POLY1305": tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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"ECDHE_RSA_AES256_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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"ECDHE_RSA_AES128_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
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"ECDHE_ECDSA_AES256_CBC_SHA": tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
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"ECDHE_ECDSA_AES128_CBC_SHA": tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
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"RSA_AES256_CBC_SHA": tls.TLS_RSA_WITH_AES_256_CBC_SHA,
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"RSA_AES128_CBC_SHA": tls.TLS_RSA_WITH_AES_128_CBC_SHA,
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"ECDHE_RSA_3DES_EDE_CBC_SHA": tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
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"RSA_3DES_EDE_CBC_SHA": tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
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}
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// defaultCipherSuites is the ordered list of all the cipher
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// suites we want to support by default, assuming AES-NI
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// (hardware acceleration for AES).
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var defaultCipherSuitesWithAESNI = []uint16{
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tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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}
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// defaultCipherSuites is the ordered list of all the cipher
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// suites we want to support by default, assuming lack of
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// AES-NI (NO hardware acceleration for AES).
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var defaultCipherSuitesWithoutAESNI = []uint16{
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tls.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
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tls.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
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tls.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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}
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// getOptimalDefaultCipherSuites returns an appropriate cipher
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// suite to use depending on the hardware support for AES.
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//
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// See https://github.com/mholt/caddy/issues/1674
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func getOptimalDefaultCipherSuites() []uint16 {
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if cpuid.CPU.AesNi() {
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return defaultCipherSuitesWithAESNI
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}
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return defaultCipherSuitesWithoutAESNI
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}
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// supportedCurves is the unordered map of supported curves.
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// https://golang.org/pkg/crypto/tls/#CurveID
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var supportedCurves = map[string]tls.CurveID{
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"X25519": tls.X25519,
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"P256": tls.CurveP256,
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"P384": tls.CurveP384,
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"P521": tls.CurveP521,
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}
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// defaultCurves is the list of only the curves we want to use
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// by default, in descending order of preference.
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//
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// This list should only include curves which are fast by design
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// (e.g. X25519) and those for which an optimized assembly
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// implementation exists (e.g. P256). The latter ones can be
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// found here:
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// https://github.com/golang/go/tree/master/src/crypto/elliptic
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var defaultCurves = []tls.CurveID{
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tls.X25519,
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tls.CurveP256,
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}
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// supportedProtocols is a map of supported protocols.
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// HTTP/2 only supports TLS 1.2 and higher.
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var supportedProtocols = map[string]uint16{
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"tls1.0": tls.VersionTLS10,
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"tls1.1": tls.VersionTLS11,
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"tls1.2": tls.VersionTLS12,
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"tls1.3": tls.VersionTLS13,
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}
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// publicKeyAlgorithms is the map of supported public key algorithms.
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var publicKeyAlgorithms = map[string]x509.PublicKeyAlgorithm{
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"rsa": x509.RSA,
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"dsa": x509.DSA,
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"ecdsa": x509.ECDSA,
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}
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