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crypto/tls: clean up supported/default/allowed parameters

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Cleaned up a lot of the plumbing to make it consistently follow this
logic: clone the preference order; filter by user preference; filter by
FIPS policy. There should be no behavior changes.

Updates #71757

Change-Id: I6a6a4656eb02e56d079f0a22f98212275a400000
Reviewed-on: https://go-review.googlesource.com/c/go/+/657096
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Daniel McCarney <daniel@binaryparadox.net>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
This commit is contained in:
yuhan6665
2025-05-10 17:13:05 -04:00
parent 12fa20f9e0
commit 45b1647aeb
9 changed files with 146 additions and 156 deletions
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defaults.go
+11 -45
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@@ -45,9 +45,17 @@ var defaultSupportedSignatureAlgorithms = []SignatureScheme{
//var tlsrsakex = godebug.New("tlsrsakex")
//var tls3des = godebug.New("tls3des")
func defaultCipherSuites() []uint16 {
suites := slices.Clone(cipherSuitesPreferenceOrder)
return slices.DeleteFunc(suites, func(c uint16) bool {
func supportedCipherSuites(aesGCMPreferred bool) []uint16 {
if aesGCMPreferred {
return slices.Clone(cipherSuitesPreferenceOrder)
} else {
return slices.Clone(cipherSuitesPreferenceOrderNoAES)
}
}
func defaultCipherSuites(aesGCMPreferred bool) []uint16 {
cipherSuites := supportedCipherSuites(aesGCMPreferred)
return slices.DeleteFunc(cipherSuites, func(c uint16) bool {
return disabledCipherSuites[c] ||
rsaKexCiphers[c] ||
tdesCiphers[c]
@@ -88,46 +96,4 @@ var defaultCipherSuitesTLS13NoAES = []uint16{
TLS_CHACHA20_POLY1305_SHA256,
TLS_AES_128_GCM_SHA256,
TLS_AES_256_GCM_SHA384,
}
// The FIPS-only policies below match BoringSSL's
// ssl_compliance_policy_fips_202205, which is based on NIST SP 800-52r2, with
// minor changes per https://go.dev/issue/71757.
// https://cs.opensource.google/boringssl/boringssl/+/master:ssl/ssl_lib.cc;l=3289;drc=ea7a88fa
var defaultSupportedVersionsFIPS = []uint16{
VersionTLS12,
VersionTLS13,
}
// defaultCurvePreferencesFIPS are the FIPS-allowed curves,
// in preference order (most preferable first).
var defaultCurvePreferencesFIPS = []CurveID{CurveP256, CurveP384, CurveP521}
// defaultSupportedSignatureAlgorithmsFIPS currently are a subset of
// defaultSupportedSignatureAlgorithms without Ed25519 and SHA-1.
var defaultSupportedSignatureAlgorithmsFIPS = []SignatureScheme{
PSSWithSHA256,
PSSWithSHA384,
PSSWithSHA512,
PKCS1WithSHA256,
ECDSAWithP256AndSHA256,
PKCS1WithSHA384,
ECDSAWithP384AndSHA384,
PKCS1WithSHA512,
ECDSAWithP521AndSHA512,
}
// defaultCipherSuitesFIPS are the FIPS-allowed cipher suites.
var defaultCipherSuitesFIPS = []uint16{
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
}
// defaultCipherSuitesTLS13FIPS are the FIPS-allowed cipher suites for TLS 1.3.
var defaultCipherSuitesTLS13FIPS = []uint16{
TLS_AES_128_GCM_SHA256,
TLS_AES_256_GCM_SHA384,
}