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crypto/tls: move defaults into defaults.go

Browse source 
Fixes #65265
Updates #60790

Change-Id: Iaa5f475d614d3ed87f091c93a3f888b7eb3433f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/587296
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Derek Parker <parkerderek86@gmail.com>
This commit is contained in:
Filippo Valsorda 2024-05-22 12:51:03 +02:00 • committed by Gopher Robot
parent 470b5f1f9d
commit 72f81ff7ec
7 changed files with 152 additions and 170 deletions
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89
boring.go
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@ -6,93 +6,10 @@
package tls
import (
"crypto/internal/boring/fipstls"
)
import "crypto/internal/boring/fipstls"
// needFIPS returns fipstls.Required(); it avoids a new import in common.go.
// needFIPS returns fipstls.Required(), which is not available without the
// boringcrypto build tag.
func needFIPS() bool {
return fipstls.Required()
}
// fipsMinVersion replaces c.minVersion in FIPS-only mode.
func fipsMinVersion(c *Config) uint16 {
// FIPS requires TLS 1.2.
return VersionTLS12
}
// fipsMaxVersion replaces c.maxVersion in FIPS-only mode.
func fipsMaxVersion(c *Config) uint16 {
// FIPS requires TLS 1.2.
return VersionTLS12
}
// default defaultFIPSCurvePreferences is the FIPS-allowed curves,
// in preference order (most preferable first).
var defaultFIPSCurvePreferences = []CurveID{CurveP256, CurveP384, CurveP521}
// fipsCurvePreferences replaces c.curvePreferences in FIPS-only mode.
func fipsCurvePreferences(c *Config) []CurveID {
if c == nil || len(c.CurvePreferences) == 0 {
return defaultFIPSCurvePreferences
}
var list []CurveID
for _, id := range c.CurvePreferences {
for _, allowed := range defaultFIPSCurvePreferences {
if id == allowed {
list = append(list, id)
break
}
}
}
return list
}
// 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,
TLS_RSA_WITH_AES_128_GCM_SHA256,
TLS_RSA_WITH_AES_256_GCM_SHA384,
}
// fipsCipherSuites replaces c.cipherSuites in FIPS-only mode.
func fipsCipherSuites(c *Config) []uint16 {
if c == nil || c.CipherSuites == nil {
return defaultCipherSuitesFIPS
}
list := make([]uint16, 0, len(defaultCipherSuitesFIPS))
for _, id := range c.CipherSuites {
for _, allowed := range defaultCipherSuitesFIPS {
if id == allowed {
list = append(list, id)
break
}
}
}
return list
}
// fipsSupportedSignatureAlgorithms currently are a subset of
// defaultSupportedSignatureAlgorithms without Ed25519 and SHA-1.
var fipsSupportedSignatureAlgorithms = []SignatureScheme{
PSSWithSHA256,
PSSWithSHA384,
PSSWithSHA512,
PKCS1WithSHA256,
ECDSAWithP256AndSHA256,
PKCS1WithSHA384,
ECDSAWithP384AndSHA384,
PKCS1WithSHA512,
ECDSAWithP521AndSHA512,
}
// supportedSignatureAlgorithms returns the supported signature algorithms.
func supportedSignatureAlgorithms() []SignatureScheme {
if !needFIPS() {
return defaultSupportedSignatureAlgorithms
}
return fipsSupportedSignatureAlgorithms
}