fix(*): Vendored project dependencies

vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/curves.go

@@ -0,0 +1,48 @@
+// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
+package ecc
+
+import (
+	"io"
+	"math/big"
+)
+
+type Curve interface {
+	GetCurveName() string
+}
+
+type ECDSACurve interface {
+	Curve
+	MarshalIntegerPoint(x, y *big.Int) []byte
+	UnmarshalIntegerPoint([]byte) (x, y *big.Int)
+	MarshalIntegerSecret(d *big.Int) []byte
+	UnmarshalIntegerSecret(d []byte) *big.Int
+	GenerateECDSA(rand io.Reader) (x, y, secret *big.Int, err error)
+	Sign(rand io.Reader, x, y, d *big.Int, hash []byte) (r, s *big.Int, err error)
+	Verify(x, y *big.Int, hash []byte, r, s *big.Int) bool
+	ValidateECDSA(x, y *big.Int, secret []byte) error
+}
+
+type EdDSACurve interface {
+	Curve
+	MarshalBytePoint(x []byte) []byte
+	UnmarshalBytePoint([]byte) (x []byte)
+	MarshalByteSecret(d []byte) []byte
+	UnmarshalByteSecret(d []byte) []byte
+	MarshalSignature(sig []byte) (r, s []byte)
+	UnmarshalSignature(r, s []byte) (sig []byte)
+	GenerateEdDSA(rand io.Reader) (pub, priv []byte, err error)
+	Sign(publicKey, privateKey, message []byte) (sig []byte, err error)
+	Verify(publicKey, message, sig []byte) bool
+	ValidateEdDSA(publicKey, privateKey []byte) (err error)
+}
+type ECDHCurve interface {
+	Curve
+	MarshalBytePoint([]byte) (encoded []byte)
+	UnmarshalBytePoint(encoded []byte) ([]byte)
+	MarshalByteSecret(d []byte) []byte
+	UnmarshalByteSecret(d []byte) []byte
+	GenerateECDH(rand io.Reader) (point []byte, secret []byte, err error)
+	Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error)
+	Decaps(ephemeral, secret []byte) (sharedSecret []byte, err error)
+	ValidateECDH(public []byte, secret []byte) error
+}