mirror of
https://github.com/refraction-networking/utls.git
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035b9d2bbf
This enables TLS 1.3, disables P-521, and disables non-ECDHE suites. Fixes #64717 Updates #62372 Change-Id: I3a65b239ef0198bbdbe5e55e0810e7128f90a091 Reviewed-on: https://go-review.googlesource.com/c/go/+/549975 Reviewed-by: Roland Shoemaker <roland@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Than McIntosh <thanm@google.com>
102 lines
2.8 KiB
Go
102 lines
2.8 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build boringcrypto
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package tls
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import "crypto/internal/boring/fipstls"
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// The FIPS-only policies enforced here currently match BoringSSL's
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// ssl_policy_fips_202205.
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// needFIPS returns fipstls.Required(); it avoids a new import in common.go.
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func needFIPS() bool {
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return fipstls.Required()
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}
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// fipsMinVersion replaces c.minVersion in FIPS-only mode.
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func fipsMinVersion(c *Config) uint16 {
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// FIPS requires TLS 1.2 or TLS 1.3.
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return VersionTLS12
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}
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// fipsMaxVersion replaces c.maxVersion in FIPS-only mode.
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func fipsMaxVersion(c *Config) uint16 {
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// FIPS requires TLS 1.2 or TLS 1.3.
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return VersionTLS13
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}
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// default defaultFIPSCurvePreferences is the FIPS-allowed curves,
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// in preference order (most preferable first).
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var defaultFIPSCurvePreferences = []CurveID{CurveP256, CurveP384}
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// fipsCurvePreferences replaces c.curvePreferences in FIPS-only mode.
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func fipsCurvePreferences(c *Config) []CurveID {
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if c == nil || len(c.CurvePreferences) == 0 {
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return defaultFIPSCurvePreferences
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}
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var list []CurveID
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for _, id := range c.CurvePreferences {
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for _, allowed := range defaultFIPSCurvePreferences {
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if id == allowed {
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list = append(list, id)
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break
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}
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}
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}
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return list
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}
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// defaultCipherSuitesFIPS are the FIPS-allowed cipher suites.
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var defaultCipherSuitesFIPS = []uint16{
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TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
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TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
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TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
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}
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// fipsCipherSuites replaces c.cipherSuites in FIPS-only mode.
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func fipsCipherSuites(c *Config) []uint16 {
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if c == nil || c.CipherSuites == nil {
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return defaultCipherSuitesFIPS
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}
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list := make([]uint16, 0, len(defaultCipherSuitesFIPS))
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for _, id := range c.CipherSuites {
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for _, allowed := range defaultCipherSuitesFIPS {
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if id == allowed {
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list = append(list, id)
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break
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}
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}
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}
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return list
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}
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// defaultCipherSuitesTLS13FIPS are the FIPS-allowed cipher suites for TLS 1.3.
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var defaultCipherSuitesTLS13FIPS = []uint16{
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TLS_AES_128_GCM_SHA256,
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TLS_AES_256_GCM_SHA384,
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}
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// fipsSupportedSignatureAlgorithms currently are a subset of
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// defaultSupportedSignatureAlgorithms without Ed25519, SHA-1, and P-521.
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var fipsSupportedSignatureAlgorithms = []SignatureScheme{
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PSSWithSHA256,
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PSSWithSHA384,
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PSSWithSHA512,
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PKCS1WithSHA256,
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ECDSAWithP256AndSHA256,
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PKCS1WithSHA384,
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ECDSAWithP384AndSHA384,
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PKCS1WithSHA512,
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}
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// supportedSignatureAlgorithms returns the supported signature algorithms.
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func supportedSignatureAlgorithms() []SignatureScheme {
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if !needFIPS() {
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return defaultSupportedSignatureAlgorithms
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}
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return fipsSupportedSignatureAlgorithms
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}
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