return nil, errMalformedJWKECKey
		}

		var curve elliptic.Curve
		switch key.Crv {
		case "P-224":
			curve = elliptic.P224()
		case "P-256":
			curve = elliptic.P256()
		case "P-384":
			curve = elliptic.P384()
		case "P-521":
			curve = elliptic.P521()
		default:
			return nil, fmt.Errorf("Unknown curve type: %s", key.Crv)
		}

		xbuf, err := base64.RawURLEncoding.DecodeString(key.X)

pkg crypto, type Encapsulator interface, Bytes() []uint8 #75300
pkg crypto, type Encapsulator interface, Encapsulate() ([]uint8, []uint8) #75300
pkg crypto/ecdh, type KeyExchanger interface { Curve, ECDH, PublicKey } #75300
pkg crypto/ecdh, type KeyExchanger interface, Curve() Curve #75300
pkg crypto/ecdh, type KeyExchanger interface, ECDH(*PublicKey) ([]uint8, error) #75300
pkg crypto/ecdh, type KeyExchanger interface, PublicKey() *PublicKey #75300

pkg crypto/ed25519, method (PrivateKey) Equal(crypto.PrivateKey) bool
pkg crypto/ed25519, method (PublicKey) Equal(crypto.PublicKey) bool
pkg crypto/elliptic, func MarshalCompressed(Curve, *big.Int, *big.Int) []uint8
pkg crypto/elliptic, func UnmarshalCompressed(Curve, []uint8) (*big.Int, *big.Int)
pkg crypto/rsa, method (*PrivateKey) Equal(crypto.PrivateKey) bool
pkg crypto/rsa, method (*PublicKey) Equal(crypto.PublicKey) bool

		tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
		tls.TLS_RSA_WITH_AES_128_CBC_SHA,
		tls.TLS_RSA_WITH_AES_256_CBC_SHA,
	}
}

// TLSCurveIDs returns a list of supported elliptic curve IDs
// in preference order.
func TLSCurveIDs() []tls.CurveID {
	return []tls.CurveID{tls.X25519MLKEM768, tls.CurveP256, tls.X25519, tls.CurveP384, tls.CurveP521}

		t.Fatalf("Expected ECDSA key[0], got %T", keys[0])
	} else if key1, ok := keys[1].(*rsa.PublicKey); !ok {
		t.Fatalf("Expected RSA key[1], got %T", keys[1])
	} else if key0.Curve != elliptic.P256() {
		t.Fatal("Key[0] is not using P-256 curve")
	} else if !bytes.Equal(key0.X.Bytes(), []byte{
		0x30, 0xa0, 0x42, 0x4c, 0xd2,
		0x1c, 0x29, 0x44, 0x83, 0x8a, 0x2d, 0x75, 0xc9, 0x2b, 0x37, 0xe7, 0x6e, 0xa2,

    validations:
      required: false

  - type: textarea
    id: learning-curve
    attributes:
      label: "Would this change make Go easier or harder to learn, and why?"

  - type: textarea
    id: cost-description
    attributes:
      label: "Cost Description"

pkg crypto, type MessageSigner interface, SignMessage(io.Reader, []uint8, SignerOpts) ([]uint8, error) #63405
pkg crypto/ecdsa, func ParseRawPrivateKey(elliptic.Curve, []uint8) (*PrivateKey, error) #63963
pkg crypto/ecdsa, func ParseUncompressedPublicKey(elliptic.Curve, []uint8) (*PublicKey, error) #63963
pkg crypto/ecdsa, method (*PrivateKey) Bytes() ([]uint8, error) #63963
pkg crypto/ecdsa, method (*PublicKey) Bytes() ([]uint8, error) #63963

pkg crypto/elliptic, type Curve interface, Add //deprecated #52221
pkg crypto/elliptic, type Curve interface, Double //deprecated #52221
pkg crypto/elliptic, type Curve interface, IsOnCurve //deprecated #52221
pkg crypto/elliptic, type Curve interface, ScalarBaseMult //deprecated #52221
pkg crypto/elliptic, type Curve interface, ScalarMult //deprecated #52221

); err != nil { return nil, err } return &PublicKey{curve: c.curve, q: bytes.Clone(key)}, nil } func ECDH[P Point[P]](c *Curve[P], k *PrivateKey, peer *PublicKey) ([]byte, error) { fipsSelfTest() fips140.RecordApproved() return ecdh(c, k, peer) } func ecdh[P Point[P]](c *Curve[P], k *PrivateKey, peer *PublicKey) ([]byte, error) { if c.curve != k.pub.curve { return nil, errors.New("crypto/ecdh: mismatched curves") } if k.pub.curve != peer.curve { return nil, errors.New("crypto/ecdh: mismatched curves")...

); err != nil { return nil, err } return &PublicKey{curve: c.curve, q: bytes.Clone(key)}, nil } func ECDH[P Point[P]](c *Curve[P], k *PrivateKey, peer *PublicKey) ([]byte, error) { fipsSelfTest() fips140.RecordApproved() return ecdh(c, k, peer) } func ecdh[P Point[P]](c *Curve[P], k *PrivateKey, peer *PublicKey) ([]byte, error) { if c.curve != k.pub.curve { return nil, errors.New("crypto/ecdh: mismatched curves") } if k.pub.curve != peer.curve { return nil, errors.New("crypto/ecdh: mismatched curves")...