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Offload TLS PRF to OpenSSL backend
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For FIPS compliance, this offloads the PRF computation in TLS to
OpenSSL, based on the work by Quim Muntal in:
microsoft/go#1036

Note that, on RHEL-9, this may cause interoperability issue against
the peers which do not use extended master secret, yielding a
connection close with internal_error alert. The way to mitigate that
behavior is described at:
https://www.redhat.com/en/blog/tls-extended-master-secret-and-fips-rhel
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@ueno
ueno committed Feb 15, 2024
1 parent 56ac3db commit ca88faa
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Showing 2 changed files with 405 additions and 68 deletions.
124 changes: 56 additions & 68 deletions patches/000-initial-setup.patch
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,27 @@ index f933f2800a..223ce04340 100644
testenv.MustHaveExternalNetwork(t)

// Create a temp dir and modcache subdir.
diff --git a/src/crypto/internal/backend/bbig/big.go b/src/crypto/internal/backend/bbig/big.go
new file mode 100644
index 0000000000..5652398605
--- /dev/null
+++ b/src/crypto/internal/backend/bbig/big.go
@@ -0,0 +1,15 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This is a mirror of
+// https://github.com/golang/go/blob/36b87f273cc43e21685179dc1664ebb5493d26ae/src/crypto/internal/boring/bbig/big.go.
+
+package bbig
+
+import (
+ "github.com/golang-fips/openssl/v2/bbig"
+)
+
+var Enc = bbig.Enc
+var Dec = bbig.Dec
diff --git a/src/crypto/internal/backend/boringtest/config.go b/src/crypto/internal/backend/boringtest/config.go
new file mode 100644
index 0000000000..6c8c00d11e
Expand Down Expand Up @@ -192,10 +213,10 @@ new file mode 100644
index 0000000000..e69de29bb2
diff --git a/src/crypto/internal/backend/nobackend.go b/src/crypto/internal/backend/nobackend.go
new file mode 100644
index 0000000000..15c1ee8cbe
index 0000000000..528ded04d7
--- /dev/null
+++ b/src/crypto/internal/backend/nobackend.go
@@ -0,0 +1,163 @@
@@ -0,0 +1,170 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
Expand Down Expand Up @@ -359,12 +380,19 @@ index 0000000000..15c1ee8cbe
+func HashSignECDSA(priv *PrivateKeyECDSA, hash []byte, h crypto.Hash) (*big.Int, *big.Int, error) {
+ panic("boringcrypto: not available")
+}
+
+func SupportsTLS1PRF() bool {
+ panic("boringcrypto: not available")
+}
+func TLS1PRF(result, secret, label, seed []byte, h func() hash.Hash) error {
+ panic("boringcrypto: not available")
+}
diff --git a/src/crypto/internal/backend/openssl.go b/src/crypto/internal/backend/openssl.go
new file mode 100644
index 0000000000..2087c555a4
index 0000000000..6ec71c625d
--- /dev/null
+++ b/src/crypto/internal/backend/openssl.go
@@ -0,0 +1,122 @@
@@ -0,0 +1,125 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
Expand Down Expand Up @@ -487,27 +515,9 @@ index 0000000000..2087c555a4
+var ExtractHKDF = openssl.ExtractHKDF
+var ExpandHKDF = openssl.ExpandHKDF
+var SupportsHKDF = openssl.SupportsHKDF
diff --git a/src/crypto/internal/backend/bbig/big.go b/src/crypto/internal/backend/bbig/big.go
new file mode 100644
index 0000000000..7fac1ec7e1
--- /dev/null
+++ b/src/crypto/internal/backend/bbig/big.go
@@ -0,0 +1,15 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// This is a mirror of
+// https://github.com/golang/go/blob/36b87f273cc43e21685179dc1664ebb5493d26ae/src/crypto/internal/boring/bbig/big.go.
+
+package bbig
+
+import (
+ "github.com/golang-fips/openssl/v2/bbig"
+)
+
+var Enc = bbig.Enc
+var Dec = bbig.Dec
+var SupportsTLS1PRF = openssl.SupportsTLS1PRF
+var TLS1PRF = openssl.TLS1PRF
diff --git a/src/crypto/rsa/pkcs1v15_test.go b/src/crypto/rsa/pkcs1v15_test.go
index dfa1eddc88..39a4fc184a 100644
--- a/src/crypto/rsa/pkcs1v15_test.go
Expand Down Expand Up @@ -734,28 +744,6 @@ index cf03e3cb7e..1226149321 100644
t.Fatalf("SignPSS unexpected error: got %v, want %v", err, InvalidSaltLenErr)
}

diff --git a/src/crypto/rsa/rsa.go b/src/crypto/rsa/rsa.go
index 63bc8dad1a..ab56ccd1ed 100644
--- a/src/crypto/rsa/rsa.go
+++ b/src/crypto/rsa/rsa.go
@@ -509,7 +509,7 @@ func EncryptOAEP(hash hash.Hash, random io.Reader, pub *PublicKey, msg []byte, l
if err != nil {
return nil, err
}
- return boring.EncryptRSAOAEP(hash, hash, bkey, msg, label)
+ return boring.EncryptRSAOAEP(hash, hash, bkey, msg, label)
}
boring.UnreachableExceptTests()

@@ -680,7 +680,7 @@ func decryptOAEP(hash, mgfHash hash.Hash, random io.Reader, priv *PrivateKey, ci
if err != nil {
return nil, err
}
- out, err := boring.DecryptRSAOAEP(hash, mgfHash, bkey, ciphertext, label)
+ out, err := boring.DecryptRSAOAEP(hash, mgfHash, bkey, ciphertext, label)
if err != nil {
return nil, ErrDecryption
}
diff --git a/src/crypto/rsa/rsa_test.go b/src/crypto/rsa/rsa_test.go
index 3278a7ff30..b994daec19 100644
--- a/src/crypto/rsa/rsa_test.go
Expand Down Expand Up @@ -1128,7 +1116,7 @@ index ba68f355eb..7bfe3f9417 100644

// A self-signed test certificate with an RSA key of size 2048, for testing
diff --git a/src/crypto/tls/cipher_suites.go b/src/crypto/tls/cipher_suites.go
index 04e6dfe018..b6ed936cd1 100644
index 589e8b6faf..669208bb86 100644
--- a/src/crypto/tls/cipher_suites.go
+++ b/src/crypto/tls/cipher_suites.go
@@ -354,6 +354,11 @@ var defaultCipherSuitesTLS13NoAES = []uint16{
Expand All @@ -1144,7 +1132,7 @@ index 04e6dfe018..b6ed936cd1 100644
hasGCMAsmAMD64 = cpu.X86.HasAES && cpu.X86.HasPCLMULQDQ
hasGCMAsmARM64 = cpu.ARM64.HasAES && cpu.ARM64.HasPMULL
diff --git a/src/crypto/tls/common.go b/src/crypto/tls/common.go
index 5394d64ac6..db4e2dbf60 100644
index e0885a0da9..5edbd19995 100644
--- a/src/crypto/tls/common.go
+++ b/src/crypto/tls/common.go
@@ -12,6 +12,7 @@ import (
Expand All @@ -1155,7 +1143,7 @@ index 5394d64ac6..db4e2dbf60 100644
"crypto/rand"
"crypto/rsa"
"crypto/sha512"
@@ -994,6 +995,9 @@ const roleServer = false
@@ -1031,6 +1032,9 @@ const roleServer = false
func (c *Config) supportedVersions(isClient bool) []uint16 {
versions := make([]uint16, 0, len(supportedVersions))
for _, v := range supportedVersions {
Expand All @@ -1166,10 +1154,10 @@ index 5394d64ac6..db4e2dbf60 100644
continue
}
diff --git a/src/crypto/tls/handshake_client.go b/src/crypto/tls/handshake_client.go
index 63d86b9f3a..a8ee915041 100644
index 4649f36dea..5e1976caf3 100644
--- a/src/crypto/tls/handshake_client.go
+++ b/src/crypto/tls/handshake_client.go
@@ -127,7 +127,9 @@ func (c *Conn) makeClientHello() (*clientHelloMsg, *ecdh.PrivateKey, error) {
@@ -139,7 +139,9 @@ func (c *Conn) makeClientHello() (*clientHelloMsg, *ecdh.PrivateKey, error) {
if len(hello.supportedVersions) == 1 {
hello.cipherSuites = nil
}
Expand All @@ -1181,10 +1169,10 @@ index 63d86b9f3a..a8ee915041 100644
} else {
hello.cipherSuites = append(hello.cipherSuites, defaultCipherSuitesTLS13NoAES...)
diff --git a/src/crypto/tls/handshake_client_test.go b/src/crypto/tls/handshake_client_test.go
index 22be38faff..d460eeb880 100644
index a2052ceb70..1666b58ef3 100644
--- a/src/crypto/tls/handshake_client_test.go
+++ b/src/crypto/tls/handshake_client_test.go
@@ -2156,6 +2156,7 @@ func testBuffering(t *testing.T, version uint16) {
@@ -2198,6 +2198,7 @@ func testBuffering(t *testing.T, version uint16) {
}

func TestAlertFlushing(t *testing.T) {
Expand All @@ -1193,7 +1181,7 @@ index 22be38faff..d460eeb880 100644
done := make(chan bool)

diff --git a/src/crypto/tls/handshake_client_tls13.go b/src/crypto/tls/handshake_client_tls13.go
index 4a8661085e..87fe11de5c 100644
index 2f59f6888c..a84cede1b0 100644
--- a/src/crypto/tls/handshake_client_tls13.go
+++ b/src/crypto/tls/handshake_client_tls13.go
@@ -41,10 +41,6 @@ type clientHandshakeStateTLS13 struct {
Expand All @@ -1208,10 +1196,10 @@ index 4a8661085e..87fe11de5c 100644
// sections 4.1.2 and 4.1.3.
if c.handshakes > 0 {
diff --git a/src/crypto/tls/handshake_server_tls13.go b/src/crypto/tls/handshake_server_tls13.go
index b7b568cd84..af75e7dbe0 100644
index 07b1a3851e..938a329668 100644
--- a/src/crypto/tls/handshake_server_tls13.go
+++ b/src/crypto/tls/handshake_server_tls13.go
@@ -44,10 +44,6 @@ type serverHandshakeStateTLS13 struct {
@@ -45,10 +45,6 @@ type serverHandshakeStateTLS13 struct {
func (hs *serverHandshakeStateTLS13) handshake() error {
c := hs.c

Expand All @@ -1223,7 +1211,7 @@ index b7b568cd84..af75e7dbe0 100644
if err := hs.processClientHello(); err != nil {
return err
diff --git a/src/crypto/tls/key_schedule.go b/src/crypto/tls/key_schedule.go
index ae8f80a7cf..30a8450f40 100644
index d7f082c9ee..e7a360fdd4 100644
--- a/src/crypto/tls/key_schedule.go
+++ b/src/crypto/tls/key_schedule.go
@@ -7,6 +7,7 @@ package tls
Expand All @@ -1234,7 +1222,7 @@ index ae8f80a7cf..30a8450f40 100644
"errors"
"fmt"
"hash"
@@ -58,9 +59,20 @@ func (c *cipherSuiteTLS13) expandLabel(secret []byte, label string, context []by
@@ -59,9 +60,20 @@ func (c *cipherSuiteTLS13) expandLabel(secret []byte, label string, context []by
panic(fmt.Errorf("failed to construct HKDF label: %s", err))
}
out := make([]byte, length)
Expand All @@ -1258,7 +1246,7 @@ index ae8f80a7cf..30a8450f40 100644
}
return out
}
@@ -78,7 +90,15 @@ func (c *cipherSuiteTLS13) extract(newSecret, currentSecret []byte) []byte {
@@ -79,7 +91,15 @@ func (c *cipherSuiteTLS13) extract(newSecret, currentSecret []byte) []byte {
if newSecret == nil {
newSecret = make([]byte, c.hash.Size())
}
Expand Down Expand Up @@ -1305,7 +1293,7 @@ index 33fd0ed52b..102acda578 100644
I_R1 := testBoringCert(t, "I_R1", boringRSAKey(t, 3072), R1, boringCertCA|boringCertFIPSOK)
testBoringCert(t, "I_R2", I_R1.key, R2, boringCertCA|boringCertFIPSOK)
diff --git a/src/crypto/x509/x509_test.go b/src/crypto/x509/x509_test.go
index 8846b00312..8734dd03c1 100644
index 19deeab54d..0c2cbf3182 100644
--- a/src/crypto/x509/x509_test.go
+++ b/src/crypto/x509/x509_test.go
@@ -12,6 +12,8 @@ import (
Expand Down Expand Up @@ -1424,7 +1412,7 @@ index 8846b00312..8734dd03c1 100644
commonName := "test.example.com"
template := Certificate{
SerialNumber: big.NewInt(1),
@@ -3607,11 +3638,19 @@ func TestParseRevocationList(t *testing.T) {
@@ -3682,11 +3713,19 @@ func TestParseRevocationList(t *testing.T) {
}

func TestRevocationListCheckSignatureFrom(t *testing.T) {
Expand All @@ -1447,10 +1435,10 @@ index 8846b00312..8734dd03c1 100644
t.Fatalf("failed to generate test key: %s", err)
}
diff --git a/src/go/build/deps_test.go b/src/go/build/deps_test.go
index 08452c7b1d..0732db0662 100644
index 592f2fd72a..1c1caa6897 100644
--- a/src/go/build/deps_test.go
+++ b/src/go/build/deps_test.go
@@ -396,9 +396,11 @@ var depsRules = `
@@ -423,9 +423,11 @@ var depsRules = `
< crypto/internal/alias
< crypto/cipher;

Expand All @@ -1463,7 +1451,7 @@ index 08452c7b1d..0732db0662 100644
< crypto/boring;

crypto/internal/alias
@@ -427,11 +429,13 @@ var depsRules = `
@@ -454,11 +456,13 @@ var depsRules = `
crypto/sha512
< CRYPTO;

Expand All @@ -1478,15 +1466,15 @@ index 08452c7b1d..0732db0662 100644
< crypto/rand
< crypto/ed25519
< encoding/asn1
@@ -629,6 +633,7 @@ func listStdPkgs(goroot string) ([]string, error) {
@@ -663,6 +667,7 @@ func listStdPkgs(goroot string) ([]string, error) {
}

func TestDependencies(t *testing.T) {
+ t.Skip("openssl based toolchain has different dependencies than upstream")
if !testenv.HasSrc() {
// Tests run in a limited file system and we do not
// provide access to every source file.
@@ -671,7 +676,7 @@ var buildIgnore = []byte("\n//go:build ignore")
@@ -705,7 +710,7 @@ var buildIgnore = []byte("\n//go:build ignore")

func findImports(pkg string) ([]string, error) {
vpkg := pkg
Expand All @@ -1495,7 +1483,7 @@ index 08452c7b1d..0732db0662 100644
vpkg = "vendor/" + pkg
}
dir := filepath.Join(Default.GOROOT, "src", vpkg)
@@ -681,7 +686,7 @@ func findImports(pkg string) ([]string, error) {
@@ -715,7 +720,7 @@ func findImports(pkg string) ([]string, error) {
}
var imports []string
var haveImport = map[string]bool{}
Expand All @@ -1505,7 +1493,7 @@ index 08452c7b1d..0732db0662 100644
}
fset := token.NewFileSet()
diff --git a/src/runtime/pprof/proto_test.go b/src/runtime/pprof/proto_test.go
index 780b481de8..63db9e9ed7 100644
index 8ec9c9109a..d7f287261f 100644
--- a/src/runtime/pprof/proto_test.go
+++ b/src/runtime/pprof/proto_test.go
@@ -15,6 +15,7 @@ import (
Expand Down
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