initial addition of essential crypto, encoders, workflows and LLM instructions

pkg/crypto/ec/ciphering.go

@@ -0,0 +1,16 @@
+// Copyright (c) 2015-2016 The btcsuite developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package btcec
+
+import (
+	"next.orly.dev/pkg/crypto/ec/secp256k1"
+)
+
+// GenerateSharedSecret generates a shared secret based on a secret key and a
+// public key using Diffie-Hellman key exchange (ECDH) (RFC 4753).
+// RFC5903 Section 9 states we should only return x.
+func GenerateSharedSecret(privkey *SecretKey, pubkey *PublicKey) []byte {
+	return secp256k1.GenerateSharedSecret(privkey, pubkey)
+}