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boringcrypto cleanup

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This commit is contained in:
Wade Simmons
2026-06-09 13:24:59 -04:00
parent cb9547b6a1
commit 3b30526379
7 changed files with 17 additions and 111 deletions
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Makefile
-7
View File
@@ -183,8 +183,6 @@ build/linux-mips-softfloat/%: LDFLAGS += -s -w
# boringcrypto
build/linux-amd64-boringcrypto/%: GOENV += GOEXPERIMENT=boringcrypto CGO_ENABLED=1
build/linux-arm64-boringcrypto/%: GOENV += GOEXPERIMENT=boringcrypto CGO_ENABLED=1
build/linux-amd64-boringcrypto/%: LDFLAGS += -checklinkname=0
build/linux-arm64-boringcrypto/%: LDFLAGS += -checklinkname=0
# fips140
build/linux-amd64-fips140/%: GOENV += GOFIPS140=v1.0.0
@@ -234,9 +232,6 @@ vet:
test:
$(TEST_ENV) go test $(TEST_FLAGS) -v ./...
test-boringcrypto:
GOEXPERIMENT=boringcrypto CGO_ENABLED=1 go test -ldflags "-checklinkname=0" -v ./...
test-pkcs11:
CGO_ENABLED=1 go test -v -tags pkcs11 ./...
@@ -309,8 +304,6 @@ fips140-latest: fips140
boringcrypto:
@echo > $(NULL_FILE)
$(eval GOENV += GOEXPERIMENT=boringcrypto CGO_ENABLED=1)
$(eval LDFLAGS += -checklinkname=0)
$(eval TEST_FLAGS += -ldflags -checklinkname=0)
$(eval TEST_ENV += $(GOENV))
$(eval CURVE = P256)
ifeq ($(words $(MAKECMDGOALS)),1)
noiseutil/boring.go
+4 -65
View File
@@ -4,77 +4,16 @@
package noiseutil
import (
"crypto/aes"
"crypto/cipher"
"encoding/binary"
// unsafe needed for go:linkname
_ "unsafe"
"crypto/boring"
"github.com/flynn/noise"
)
var CipherAESGCM noise.CipherFunc = CipherAESGCMFIPS140
// EncryptLockNeeded indicates if calls to Encrypt need a lock
// This is true for boringcrypto because the Seal function verifies that the
// nonce is strictly increasing.
const EncryptLockNeeded = true
// NewGCMTLS is no longer exposed in go1.19+, so we need to link it in
// See: https://github.com/golang/go/issues/56326
//
// NewGCMTLS is the internal method used with boringcrypto that provides a
// validated mode of AES-GCM which enforces the nonce is strictly
// monotonically increasing. This is the TLS 1.2 specification for nonce
// generation (which also matches the method used by the Noise Protocol)
//
// - https://github.com/golang/go/blob/go1.19/src/crypto/tls/cipher_suites.go#L520-L522
// - https://github.com/golang/go/blob/go1.19/src/crypto/internal/boring/aes.go#L235-L237
// - https://github.com/golang/go/blob/go1.19/src/crypto/internal/boring/aes.go#L250
// - https://github.com/google/boringssl/blob/ae223d6138807a13006342edfeef32e813246b39/include/openssl/aead.h#L379-L381
// - https://github.com/google/boringssl/blob/ae223d6138807a13006342edfeef32e813246b39/crypto/fipsmodule/cipher/e_aes.c#L1082-L1093
//
//go:linkname newGCMTLS crypto/internal/boring.NewGCMTLS
func newGCMTLS(c cipher.Block) (cipher.AEAD, error)
type cipherFn struct {
fn func([32]byte) noise.Cipher
name string
}
func (c cipherFn) Cipher(k [32]byte) noise.Cipher { return c.fn(k) }
func (c cipherFn) CipherName() string { return c.name }
// CipherAESGCM is the AES256-GCM AEAD cipher (using NewGCMTLS when GoBoring is present)
var CipherAESGCM noise.CipherFunc = cipherFn{cipherAESGCMBoring, "AESGCM"}
func cipherAESGCMBoring(k [32]byte) noise.Cipher {
c, err := aes.NewCipher(k[:])
if err != nil {
panic(err)
}
gcm, err := newGCMTLS(c)
if err != nil {
panic(err)
}
return aeadCipher{
gcm,
func(n uint64) []byte {
var nonce [12]byte
binary.BigEndian.PutUint64(nonce[4:], n)
return nonce[:]
},
}
}
type aeadCipher struct {
cipher.AEAD
nonce func(uint64) []byte
}
func (c aeadCipher) Encrypt(out []byte, n uint64, ad, plaintext []byte) []byte {
return c.Seal(out, c.nonce(n), plaintext, ad)
}
func (c aeadCipher) Decrypt(out []byte, n uint64, ad, ciphertext []byte) ([]byte, error) {
return c.Open(out, c.nonce(n), ciphertext, ad)
}
var boringEnabled = boring.Enabled()
noiseutil/boring_test.go
-32
View File
@@ -4,8 +4,6 @@
package noiseutil
import (
"crypto/boring"
"encoding/hex"
"testing"
"github.com/stretchr/testify/assert"
@@ -14,33 +12,3 @@ import (
func TestEncryptLockNeeded(t *testing.T) {
assert.True(t, EncryptLockNeeded)
}
// Ensure NewGCMTLS validates the nonce is non-repeating
func TestNewGCMTLS(t *testing.T) {
assert.True(t, boring.Enabled())
// Test Case 16 from GCM Spec:
// - (now dead link): http://csrc.nist.gov/groups/ST/toolkit/BCM/documents/proposedmodes/gcm/gcm-spec.pdf
// - as listed in boringssl tests: https://github.com/google/boringssl/blob/fips-20220613/crypto/cipher_extra/test/cipher_tests.txt#L412-L418
key, _ := hex.DecodeString("feffe9928665731c6d6a8f9467308308feffe9928665731c6d6a8f9467308308")
iv, _ := hex.DecodeString("cafebabefacedbaddecaf888")
plaintext, _ := hex.DecodeString("d9313225f88406e5a55909c5aff5269a86a7a9531534f7da2e4c303d8a318a721c3c0c95956809532fcf0e2449a6b525b16aedf5aa0de657ba637b39")
aad, _ := hex.DecodeString("feedfacedeadbeeffeedfacedeadbeefabaddad2")
expected, _ := hex.DecodeString("522dc1f099567d07f47f37a32a84427d643a8cdcbfe5c0c97598a2bd2555d1aa8cb08e48590dbb3da7b08b1056828838c5f61e6393ba7a0abcc9f662")
expectedTag, _ := hex.DecodeString("76fc6ece0f4e1768cddf8853bb2d551b")
expected = append(expected, expectedTag...)
var keyArray [32]byte
copy(keyArray[:], key)
c := CipherAESGCM.Cipher(keyArray)
aead := c.(aeadCipher).AEAD
dst := aead.Seal([]byte{}, iv, plaintext, aad)
assert.Equal(t, expected, dst)
// We expect this to fail since we are re-encrypting with a repeat IV
assert.PanicsWithError(t, "boringcrypto: EVP_AEAD_CTX_seal failed", func() {
dst = aead.Seal([]byte{}, iv, plaintext, aad)
})
}
noiseutil/cipher_state_test.go
+1 -1
View File
@@ -23,7 +23,7 @@ func TestNewCipherStateDispatch(t *testing.T) {
encA, _ := buildCipherStates(t, CipherAESGCM)
encC, _ := buildCipherStates(t, noise.CipherChaChaPoly)
if !fips140.Enabled() {
if !boringEnabled && !fips140.Enabled() {
assert.IsType(t, &CipherStateAESGCM{}, NewCipherState(encA, CipherAESGCM))
} else {
// fips140
noiseutil/fips140.go
+2 -3
View File
@@ -1,5 +1,3 @@
//go:build !boringcrypto
package noiseutil
import (
@@ -17,7 +15,8 @@ import (
// - https://github.com/golang/go/issues/73110
// - https://github.com/golang/go/issues/79219
// Using tls.aeadAESGCMTLS13 gives us the TLS 1.3 GCM, which also verifies
// that the nonce is strictly increasing.
// that the nonce is strictly increasing. This works for both boringcrypto
// and fips140.
//
//go:linkname aeadAESGCMTLS13 crypto/tls.aeadAESGCMTLS13
func aeadAESGCMTLS13(key, noncePrefix []byte) cipher.AEAD
noiseutil/fips140_test.go
+8 -3
View File
@@ -11,7 +11,7 @@ import (
// Ensure NewAESGCM validates the nonce is non-repeating
func TestNewAESGCM(t *testing.T) {
if !fips140.Enabled() {
if !boringEnabled && !fips140.Enabled() {
t.Skip()
return
}
@@ -32,11 +32,16 @@ func TestNewAESGCM(t *testing.T) {
assert.Equal(t, expected, dst)
// We expect this to fail since we are re-encrypting with a repeat IV
if fips140.Version() == "v1.0.0" {
switch {
case boringEnabled:
assert.PanicsWithError(t, "boringcrypto: EVP_AEAD_CTX_seal failed", func() {
dst = aead.Seal([]byte{}, iv, plaintext, aad)
})
case fips140.Version() == "v1.0.0":
assert.PanicsWithValue(t, "crypto/cipher: counter decreased", func() {
dst = aead.Seal([]byte{}, iv, plaintext, aad)
})
} else {
default:
assert.PanicsWithValue(t, "crypto/cipher: counter decreased or remained the same", func() {
dst = aead.Seal([]byte{}, iv, plaintext, aad)
})
noiseutil/notboring.go
+2
View File
@@ -21,3 +21,5 @@ func initAESGCM() noise.CipherFunc {
}
}
var boringEnabled = false