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more conversions.

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This commit is contained in:
fiatjaf
2025-04-15 00:00:03 -03:00
parent f9e4a5efa3
commit 376834cbf9
117 changed files with 450 additions and 1019 deletions
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24
nip44/nip44.go
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@@ -12,6 +12,7 @@ import (
"io"
"math"
"fiatjaf.com/nostr"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/decred/dcrd/dcrec/secp256k1/v4"
"golang.org/x/crypto/chacha20"
@@ -153,10 +154,12 @@ func Decrypt(b64ciphertextWrapped string, conversationKey [32]byte) (string, err
return string(unpadded), nil
}
func GenerateConversationKey(pub string, sk string) ([32]byte, error) {
var maxThreshold, _ = hex.DecodeString("fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141")
func GenerateConversationKey(pub nostr.PubKey, sk [32]byte) ([32]byte, error) {
var ck [32]byte
if sk >= "fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141" || sk == "0000000000000000000000000000000000000000000000000000000000000000" {
if bytes.Compare(sk[:], maxThreshold) != -1 || sk == [32]byte{} {
return ck, fmt.Errorf("invalid private key: x coordinate %s is not on the secp256k1 curve", sk)
}
@@ -220,20 +223,13 @@ func calcPadding(sLen int) int {
}
// code adapted from nip04.ComputeSharedSecret()
func computeSharedSecret(pub string, sk string) (sharedSecret [32]byte, err error) {
privKeyBytes, err := hex.DecodeString(sk)
if err != nil {
return sharedSecret, fmt.Errorf("error decoding sender private key: %w", err)
}
privKey, _ := btcec.PrivKeyFromBytes(privKeyBytes)
func computeSharedSecret(pub nostr.PubKey, sk [32]byte) (sharedSecret [32]byte, err error) {
privKey, _ := btcec.PrivKeyFromBytes(sk[:])
pubKeyBytes, err := hex.DecodeString("02" + pub)
pubKey, err := btcec.ParsePubKey(append([]byte{2}, pub[:]...))
if err != nil {
return sharedSecret, fmt.Errorf("error decoding hex string of receiver public key '%s': %w", "02"+pub, err)
}
pubKey, err := btcec.ParsePubKey(pubKeyBytes)
if err != nil {
return sharedSecret, fmt.Errorf("error parsing receiver public key '%s': %w", "02"+pub, err)
return sharedSecret, fmt.Errorf("error parsing receiver public key '%s': %w",
"02"+hex.EncodeToString(pub[:]), err)
}
var point, result secp256k1.JacobianPoint