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Drop CECPQ2 support.

Browse Source 
HRSS itself remains in libcrypto because there are some direct users of
it. But this will let it be dropped by the linker in many cases.

Change-Id: I870eda30c9ed1d08693c770e9e7df45a2711b7df
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/58645
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
fips-20230428
Adam Langley 2 years ago committed by Boringssl LUCI CQ
parent 298e6c2b9c
commit 4ae4fb76c8
15 changed files with 57 additions and 1460 deletions
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  1. 4
      crypto/obj/obj_dat.h
  2. 1
      crypto/obj/obj_mac.num
  3. 1
      crypto/obj/objects.txt
  4. 3
      include/openssl/nid.h
  5. 1
      include/openssl/ssl.h
  6. 3
      ssl/extensions.cc
  7. 98
      ssl/ssl_key_share.cc
  8. 4
      ssl/ssl_test.cc
  9. 5
      ssl/test/fuzzer.h
  10. 18
      ssl/test/runner/common.go
  11. 6
      ssl/test/runner/handshake_server.go
  12. 1212
      ssl/test/runner/hrss/hrss.go
  13. 89
      ssl/test/runner/key_agreement.go
  14. 68
      ssl/test/runner/runner.go
  15. 4
      ssl/test/test_config.cc

4
crypto/obj/obj_dat.h
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@ -8777,7 +8777,7 @@ static const ASN1_OBJECT kObjects[NUM_NID] = {
{"AuthPSK", "auth-psk", NID_auth_psk, 0, NULL, 0},
{"KxANY", "kx-any", NID_kx_any, 0, NULL, 0},
{"AuthANY", "auth-any", NID_auth_any, 0, NULL, 0},
{"CECPQ2", "CECPQ2", NID_CECPQ2, 0, NULL, 0},
{NULL, NULL, NID_undef, 0, NULL, 0},
{"ED448", "ED448", NID_ED448, 3, &kObjectData[6181], 0},
{"X448", "X448", NID_X448, 3, &kObjectData[6184], 0},
{"SHA512-256", "sha512-256", NID_sha512_256, 9, &kObjectData[6187], 0},
@ -8846,7 +8846,6 @@ static const uint16_t kNIDsInShortNameOrder[] = {
110 /* CAST5-CFB */,
109 /* CAST5-ECB */,
111 /* CAST5-OFB */,
959 /* CECPQ2 */,
894 /* CMAC */,
13 /* CN */,
141 /* CRLReason */,
@ -9758,7 +9757,6 @@ static const uint16_t kNIDsInLongNameOrder[] = {
285 /* Biometric Info */,
179 /* CA Issuers */,
785 /* CA Repository */,
959 /* CECPQ2 */,
131 /* Code Signing */,
783 /* Diffie-Hellman based MAC */,
382 /* Directory */,

1
crypto/obj/obj_mac.num
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@ -947,7 +947,6 @@ auth_ecdsa 955
auth_psk 956
kx_any 957
auth_any 958
CECPQ2 959
ED448 960
X448 961
sha512_256 962

1
crypto/obj/objects.txt
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@ -1333,7 +1333,6 @@ secg-scheme 14 3 : dhSinglePass-cofactorDH-sha512kdf-scheme
: dh-cofactor-kdf
# NIDs for post quantum key agreements (no corresponding OIDs).
: CECPQ2
: X25519Kyber768
: P256Kyber768
: P384Kyber768

3
include/openssl/nid.h
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@ -4235,9 +4235,6 @@ extern "C" {
#define LN_auth_any "auth-any"
#define NID_auth_any 958
#define SN_CECPQ2 "CECPQ2"
#define NID_CECPQ2 959
#define SN_ED448 "ED448"
#define NID_ED448 960
#define OBJ_ED448 1L, 3L, 101L, 113L

1
include/openssl/ssl.h
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@ -2334,7 +2334,6 @@ OPENSSL_EXPORT int SSL_set1_curves_list(SSL *ssl, const char *curves);
#define SSL_CURVE_SECP384R1 24
#define SSL_CURVE_SECP521R1 25
#define SSL_CURVE_X25519 29
#define SSL_CURVE_CECPQ2 16696
#define SSL_CURVE_X25519KYBER768 0x6399
#define SSL_CURVE_P256KYBER768 0xfe32

3
ssl/extensions.cc
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@ -206,7 +206,6 @@ static bool tls1_check_duplicate_extensions(const CBS *cbs) {
static bool is_post_quantum_group(uint16_t id) {
switch (id) {
case SSL_CURVE_CECPQ2:
case SSL_CURVE_X25519KYBER768:
case SSL_CURVE_P256KYBER768:
return true;
@ -414,7 +413,7 @@ bool tls1_set_curves_list(Array<uint16_t> *out_group_ids, const char *curves) {
bool tls1_check_group_id(const SSL_HANDSHAKE *hs, uint16_t group_id) {
if (is_post_quantum_group(group_id) &&
ssl_protocol_version(hs->ssl) < TLS1_3_VERSION) {
// CECPQ2(b) requires TLS 1.3.
// Post-quantum "groups" require TLS 1.3.
return false;
}

98
ssl/ssl_key_share.cc
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@ -192,101 +192,6 @@ class X25519KeyShare : public SSLKeyShare {
uint8_t private_key_[32];
};
class CECPQ2KeyShare : public SSLKeyShare {
public:
CECPQ2KeyShare() {}
uint16_t GroupID() const override { return SSL_CURVE_CECPQ2; }
bool Generate(CBB *out) override {
uint8_t x25519_public_key[32];
X25519_keypair(x25519_public_key, x25519_private_key_);
uint8_t hrss_entropy[HRSS_GENERATE_KEY_BYTES];
HRSS_public_key hrss_public_key;
RAND_bytes(hrss_entropy, sizeof(hrss_entropy));
if (!HRSS_generate_key(&hrss_public_key, &hrss_private_key_,
hrss_entropy)) {
return false;
}
uint8_t hrss_public_key_bytes[HRSS_PUBLIC_KEY_BYTES];
HRSS_marshal_public_key(hrss_public_key_bytes, &hrss_public_key);
if (!CBB_add_bytes(out, x25519_public_key, sizeof(x25519_public_key)) ||
!CBB_add_bytes(out, hrss_public_key_bytes,
sizeof(hrss_public_key_bytes))) {
return false;
}
return true;
}
bool Encap(CBB *out_ciphertext, Array<uint8_t> *out_secret,
uint8_t *out_alert, Span<const uint8_t> peer_key) override {
Array<uint8_t> secret;
if (!secret.Init(32 + HRSS_KEY_BYTES)) {
return false;
}
uint8_t x25519_public_key[32];
X25519_keypair(x25519_public_key, x25519_private_key_);
HRSS_public_key peer_public_key;
if (peer_key.size() != 32 + HRSS_PUBLIC_KEY_BYTES ||
!HRSS_parse_public_key(&peer_public_key, peer_key.data() + 32) ||
!X25519(secret.data(), x25519_private_key_, peer_key.data())) {
*out_alert = SSL_AD_DECODE_ERROR;
OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECPOINT);
return false;
}
uint8_t ciphertext[HRSS_CIPHERTEXT_BYTES];
uint8_t entropy[HRSS_ENCAP_BYTES];
RAND_bytes(entropy, sizeof(entropy));
if (!HRSS_encap(ciphertext, secret.data() + 32, &peer_public_key,
entropy) ||
!CBB_add_bytes(out_ciphertext, x25519_public_key,
sizeof(x25519_public_key)) ||
!CBB_add_bytes(out_ciphertext, ciphertext, sizeof(ciphertext))) {
return false;
}
*out_secret = std::move(secret);
return true;
}
bool Decap(Array<uint8_t> *out_secret, uint8_t *out_alert,
Span<const uint8_t> ciphertext) override {
*out_alert = SSL_AD_INTERNAL_ERROR;
Array<uint8_t> secret;
if (!secret.Init(32 + HRSS_KEY_BYTES)) {
return false;
}
if (ciphertext.size() != 32 + HRSS_CIPHERTEXT_BYTES ||
!X25519(secret.data(), x25519_private_key_, ciphertext.data())) {
*out_alert = SSL_AD_DECODE_ERROR;
OPENSSL_PUT_ERROR(SSL, SSL_R_BAD_ECPOINT);
return false;
}
if (!HRSS_decap(secret.data() + 32, &hrss_private_key_,
ciphertext.data() + 32, ciphertext.size() - 32)) {
return false;
}
*out_secret = std::move(secret);
return true;
}
private:
uint8_t x25519_private_key_[32];
HRSS_private_key hrss_private_key_;
};
class X25519Kyber768KeyShare : public SSLKeyShare {
public:
X25519Kyber768KeyShare() {}
@ -405,7 +310,6 @@ constexpr NamedGroup kNamedGroups[] = {
{NID_secp384r1, SSL_CURVE_SECP384R1, "P-384", "secp384r1"},
{NID_secp521r1, SSL_CURVE_SECP521R1, "P-521", "secp521r1"},
{NID_X25519, SSL_CURVE_X25519, "X25519", "x25519"},
{NID_CECPQ2, SSL_CURVE_CECPQ2, "CECPQ2", "CECPQ2"},
{NID_X25519Kyber768, SSL_CURVE_X25519KYBER768, "X25519KYBER",
"X25519Kyber"},
{NID_P256Kyber768, SSL_CURVE_P256KYBER768, "P256KYBER", "P256Kyber"},
@ -429,8 +333,6 @@ UniquePtr<SSLKeyShare> SSLKeyShare::Create(uint16_t group_id) {
return MakeUnique<ECKeyShare>(NID_secp521r1, SSL_CURVE_SECP521R1);
case SSL_CURVE_X25519:
return MakeUnique<X25519KeyShare>();
case SSL_CURVE_CECPQ2:
return MakeUnique<CECPQ2KeyShare>();
case SSL_CURVE_X25519KYBER768:
return MakeUnique<X25519Kyber768KeyShare>();
case SSL_CURVE_P256KYBER768:

4
ssl/ssl_test.cc
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@ -401,8 +401,8 @@ static const CurveTest kCurveTests[] = {
{ SSL_CURVE_SECP256R1 },
},
{
"P-256:CECPQ2",
{ SSL_CURVE_SECP256R1, SSL_CURVE_CECPQ2 },
"P-256:X25519KYBER",
{ SSL_CURVE_SECP256R1, SSL_CURVE_X25519KYBER768 },
},
{

5
ssl/test/fuzzer.h
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@ -418,8 +418,9 @@ class TLSFuzzer {
return false;
}
static const int kCurves[] = {NID_CECPQ2, NID_X25519, NID_X9_62_prime256v1,
NID_secp384r1, NID_secp521r1};
static const int kCurves[] = {NID_X25519Kyber768, NID_X25519,
NID_X9_62_prime256v1, NID_secp384r1,
NID_secp521r1};
if (!SSL_CTX_set1_curves(ctx_.get(), kCurves,
OPENSSL_ARRAY_SIZE(kCurves))) {
return false;

18
ssl/test/runner/common.go
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@ -148,12 +148,12 @@ var tls13HelloRetryRequest = []uint8{
type CurveID uint16
const (
CurveP224 CurveID = 21
CurveP256 CurveID = 23
CurveP384 CurveID = 24
CurveP521 CurveID = 25
CurveX25519 CurveID = 29
CurveCECPQ2 CurveID = 16696
CurveP224 CurveID = 21
CurveP256 CurveID = 23
CurveP384 CurveID = 24
CurveP521 CurveID = 25
CurveX25519 CurveID = 29
CurveX25519Kyber768 CurveID = 0x6399
)
// TLS Elliptic Curve Point Formats
@ -1890,9 +1890,9 @@ type ProtocolBugs struct {
// hello retry.
FailIfHelloRetryRequested bool
// FailedIfCECPQ2Offered will cause a server to reject a ClientHello if CECPQ2
// FailedIfKyberOffered will cause a server to reject a ClientHello if Kyber
// is supported.
FailIfCECPQ2Offered bool
FailIfKyberOffered bool
// ExpectKeyShares, if not nil, lists (in order) the curves that a ClientHello
// should have key shares for.
@ -1996,7 +1996,7 @@ func (c *Config) maxVersion(isDTLS bool) uint16 {
return ret
}
var defaultCurvePreferences = []CurveID{CurveCECPQ2, CurveX25519, CurveP256, CurveP384, CurveP521}
var defaultCurvePreferences = []CurveID{CurveX25519, CurveP256, CurveP384, CurveP521}
func (c *Config) curvePreferences() []CurveID {
if c == nil || len(c.CurvePreferences) == 0 {

6
ssl/test/runner/handshake_server.go
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@ -280,10 +280,10 @@ func (hs *serverHandshakeState) readClientHello() error {
}
}
if config.Bugs.FailIfCECPQ2Offered {
if config.Bugs.FailIfKyberOffered {
for _, offeredCurve := range hs.clientHello.supportedCurves {
if isPqGroup(offeredCurve) {
return errors.New("tls: CECPQ2 was offered")
return errors.New("tls: X25519Kyber768 was offered")
}
}
}
@ -1467,7 +1467,7 @@ func (hs *serverHandshakeState) processClientHello() (isResume bool, err error)
Curves:
for _, curve := range hs.clientHello.supportedCurves {
if isPqGroup(curve) && c.vers < VersionTLS13 {
// CECPQ2 is TLS 1.3-only.
// Post-quantum is TLS 1.3 only.
continue
}

1212
ssl/test/runner/hrss/hrss.go
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File diff suppressed because it is too large Load Diff

89
ssl/test/runner/key_agreement.go
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@ -17,7 +17,6 @@ import (
"io"
"math/big"
"boringssl.googlesource.com/boringssl/ssl/test/runner/hrss"
"golang.org/x/crypto/curve25519"
)
@ -341,90 +340,6 @@ func (e *x25519KEM) decap(ciphertext []byte) (secret []byte, err error) {
return out[:], nil
}
// cecpq2KEM implements CECPQ2, which is HRSS+SXY combined with X25519.
type cecpq2KEM struct {
x25519PrivateKey [32]byte
hrssPrivateKey hrss.PrivateKey
}
func (e *cecpq2KEM) generate(rand io.Reader) (publicKey []byte, err error) {
if _, err := io.ReadFull(rand, e.x25519PrivateKey[:]); err != nil {
return nil, err
}
var x25519Public [32]byte
curve25519.ScalarBaseMult(&x25519Public, &e.x25519PrivateKey)
e.hrssPrivateKey = hrss.GenerateKey(rand)
hrssPublic := e.hrssPrivateKey.PublicKey.Marshal()
var ret []byte
ret = append(ret, x25519Public[:]...)
ret = append(ret, hrssPublic...)
return ret, nil
}
func (e *cecpq2KEM) encap(rand io.Reader, peerKey []byte) (ciphertext []byte, secret []byte, err error) {
if len(peerKey) != 32+hrss.PublicKeySize {
return nil, nil, errors.New("tls: bad length CECPQ2 offer")
}
if _, err := io.ReadFull(rand, e.x25519PrivateKey[:]); err != nil {
return nil, nil, err
}
var x25519Shared, x25519PeerKey, x25519Public [32]byte
copy(x25519PeerKey[:], peerKey)
curve25519.ScalarBaseMult(&x25519Public, &e.x25519PrivateKey)
curve25519.ScalarMult(&x25519Shared, &e.x25519PrivateKey, &x25519PeerKey)
// Per RFC 7748, reject the all-zero value in constant time.
var zeros [32]byte
if subtle.ConstantTimeCompare(zeros[:], x25519Shared[:]) == 1 {
return nil, nil, errors.New("tls: X25519 value with wrong order")
}
hrssPublicKey, ok := hrss.ParsePublicKey(peerKey[32:])
if !ok {
return nil, nil, errors.New("tls: bad CECPQ2 offer")
}
hrssCiphertext, hrssShared := hrssPublicKey.Encap(rand)
ciphertext = append(ciphertext, x25519Public[:]...)
ciphertext = append(ciphertext, hrssCiphertext...)
secret = append(secret, x25519Shared[:]...)
secret = append(secret, hrssShared...)
return ciphertext, secret, nil
}
func (e *cecpq2KEM) decap(ciphertext []byte) (secret []byte, err error) {
if len(ciphertext) != 32+hrss.CiphertextSize {
return nil, errors.New("tls: bad length CECPQ2 reply")
}
var x25519Shared, x25519PeerKey [32]byte
copy(x25519PeerKey[:], ciphertext)
curve25519.ScalarMult(&x25519Shared, &e.x25519PrivateKey, &x25519PeerKey)
// Per RFC 7748, reject the all-zero value in constant time.
var zeros [32]byte
if subtle.ConstantTimeCompare(zeros[:], x25519Shared[:]) == 1 {
return nil, errors.New("tls: X25519 value with wrong order")
}
hrssShared, ok := e.hrssPrivateKey.Decap(ciphertext[32:])
if !ok {
return nil, errors.New("tls: invalid HRSS ciphertext")
}
secret = append(secret, x25519Shared[:]...)
secret = append(secret, hrssShared...)
return secret, nil
}
func kemForCurveID(id CurveID, config *Config) (kemImplementation, bool) {
switch id {
case CurveP224:
@ -437,8 +352,6 @@ func kemForCurveID(id CurveID, config *Config) (kemImplementation, bool) {
return &ecdhKEM{curve: elliptic.P521(), sendCompressed: config.Bugs.SendCompressedCoordinates}, true
case CurveX25519:
return &x25519KEM{setHighBit: config.Bugs.SetX25519HighBit}, true
case CurveCECPQ2:
return &cecpq2KEM{}, true
default:
return nil, false
}
@ -587,7 +500,7 @@ func (ka *ecdheKeyAgreement) generateServerKeyExchange(config *Config, cert *Cer
NextCandidate:
for _, candidate := range preferredCurves {
if isPqGroup(candidate) && version < VersionTLS13 {
// CECPQ2 is TLS 1.3-only.
// Post-quantum "groups" require TLS 1.3.
continue
}

68
ssl/test/runner/runner.go
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@ -11371,13 +11371,12 @@ var testCurves = []struct {
{"P-384", CurveP384},
{"P-521", CurveP521},
{"X25519", CurveX25519},
{"CECPQ2", CurveCECPQ2},
}
const bogusCurve = 0x1234
func isPqGroup(r CurveID) bool {
return r == CurveCECPQ2
return r == CurveX25519Kyber768
}
func addCurveTests() {
@ -11841,78 +11840,79 @@ func addCurveTests() {
},
})
// CECPQ2 should not be offered by a TLS < 1.3 client.
// Kyber should not be offered by a TLS < 1.3 client.
testCases = append(testCases, testCase{
name: "CECPQ2NotInTLS12",
name: "KyberNotInTLS12",
config: Config{
Bugs: ProtocolBugs{
FailIfCECPQ2Offered: true,
FailIfKyberOffered: true,
},
},
flags: []string{
"-max-version", strconv.Itoa(VersionTLS12),
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-curves", strconv.Itoa(int(CurveX25519)),
},
})
// CECPQ2 should not crash a TLS < 1.3 client if the server mistakenly
// Kyber should not crash a TLS < 1.3 client if the server mistakenly
// selects it.
testCases = append(testCases, testCase{
name: "CECPQ2NotAcceptedByTLS12Client",
name: "KyberNotAcceptedByTLS12Client",
config: Config{
Bugs: ProtocolBugs{
SendCurve: CurveCECPQ2,
SendCurve: CurveX25519Kyber768,
},
},
flags: []string{
"-max-version", strconv.Itoa(VersionTLS12),
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-curves", strconv.Itoa(int(CurveX25519)),
},
shouldFail: true,
expectedError: ":WRONG_CURVE:",
})
// CECPQ2 should not be offered by default as a client.
// Kyber should not be offered by default as a client.
testCases = append(testCases, testCase{
name: "CECPQ2NotEnabledByDefaultInClients",
name: "KyberNotEnabledByDefaultInClients",
config: Config{
MinVersion: VersionTLS13,
Bugs: ProtocolBugs{
FailIfCECPQ2Offered: true,
FailIfKyberOffered: true,
},
},
})
// If CECPQ2 is offered, both X25519 and CECPQ2 should have a key-share.
// If Kyber is offered, both X25519 and Kyber should have a key-share.
testCases = append(testCases, testCase{
name: "NotJustCECPQ2KeyShare",
name: "NotJustKyberKeyShare",
config: Config{
MinVersion: VersionTLS13,
Bugs: ProtocolBugs{
ExpectedKeyShares: []CurveID{CurveCECPQ2, CurveX25519},
ExpectedKeyShares: []CurveID{CurveX25519Kyber768, CurveX25519},
},
},
flags: []string{
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-curves", strconv.Itoa(int(CurveX25519)),
"-expect-curve-id", strconv.Itoa(int(CurveCECPQ2)),
// Cannot expect Kyber until we have a Go implementation of it.
// "-expect-curve-id", strconv.Itoa(int(CurveX25519Kyber768)),
},
})
// ... and the other way around
testCases = append(testCases, testCase{
name: "CECPQ2KeyShareIncludedSecond",
name: "KyberKeyShareIncludedSecond",
config: Config{
MinVersion: VersionTLS13,
Bugs: ProtocolBugs{
ExpectedKeyShares: []CurveID{CurveX25519, CurveCECPQ2},
ExpectedKeyShares: []CurveID{CurveX25519, CurveX25519Kyber768},
},
},
flags: []string{
"-curves", strconv.Itoa(int(CurveX25519)),
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-expect-curve-id", strconv.Itoa(int(CurveX25519)),
},
})
@ -11921,44 +11921,46 @@ func addCurveTests() {
// first classical and first post-quantum "curves" that get key shares
// included.
testCases = append(testCases, testCase{
name: "CECPQ2KeyShareIncludedThird",
name: "KyberKeyShareIncludedThird",
config: Config{
MinVersion: VersionTLS13,
Bugs: ProtocolBugs{
ExpectedKeyShares: []CurveID{CurveX25519, CurveCECPQ2},
ExpectedKeyShares: []CurveID{CurveX25519, CurveX25519Kyber768},
},
},
flags: []string{
"-curves", strconv.Itoa(int(CurveX25519)),
"-curves", strconv.Itoa(int(CurveP256)),
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-expect-curve-id", strconv.Itoa(int(CurveX25519)),
},
})
// If CECPQ2 is the only configured curve, the key share is sent.
// If Kyber is the only configured curve, the key share is sent.
testCases = append(testCases, testCase{
name: "JustConfiguringCECPQ2Works",
name: "JustConfiguringKyberWorks",
config: Config{
MinVersion: VersionTLS13,
Bugs: ProtocolBugs{
ExpectedKeyShares: []CurveID{CurveCECPQ2},
ExpectedKeyShares: []CurveID{CurveX25519Kyber768},
},
},
flags: []string{
"-curves", strconv.Itoa(int(CurveCECPQ2)),
"-expect-curve-id", strconv.Itoa(int(CurveCECPQ2)),
"-curves", strconv.Itoa(int(CurveX25519Kyber768)),
"-expect-curve-id", strconv.Itoa(int(CurveX25519Kyber768)),
},
shouldFail: true,
expectedLocalError: "no curve supported by both client and server",
})
// As a server, CECPQ2 is not yet supported by default.
// As a server, Kyber is not yet supported by default.
testCases = append(testCases, testCase{
testType: serverTest,
name: "CECPQ2NotEnabledByDefaultForAServer",
name: "KyberNotEnabledByDefaultForAServer",
config: Config{
MinVersion: VersionTLS13,
CurvePreferences: []CurveID{CurveCECPQ2, CurveX25519},
DefaultCurves: []CurveID{CurveCECPQ2},
CurvePreferences: []CurveID{CurveX25519Kyber768, CurveX25519},
DefaultCurves: []CurveID{CurveX25519Kyber768},
},
flags: []string{
"-server-preference",

4
ssl/test/test_config.cc
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@ -1909,8 +1909,8 @@ bssl::UniquePtr<SSL> TestConfig::NewSSL(
nids.push_back(NID_X25519);
break;
case SSL_CURVE_CECPQ2:
nids.push_back(NID_CECPQ2);
case SSL_CURVE_X25519KYBER768:
nids.push_back(NID_X25519Kyber768);
break;
}
if (!SSL_set1_curves(ssl.get(), &nids[0], nids.size())) {

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