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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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17
nip04/nip04.go
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@@ -10,27 +10,20 @@ import (
"fmt"
"strings"
"fiatjaf.com/nostr"
"github.com/btcsuite/btcd/btcec/v2"
)
// ComputeSharedSecret returns a shared secret key used to encrypt messages.
// The private and public keys should be hex encoded.
// Uses the Diffie-Hellman key exchange (ECDH) (RFC 4753).
func ComputeSharedSecret(pub string, sk string) (sharedSecret []byte, err error) {
privKeyBytes, err := hex.DecodeString(sk)
if err != nil {
return nil, fmt.Errorf("error decoding sender private key: %w", err)
}
privKey, _ := btcec.PrivKeyFromBytes(privKeyBytes)
func ComputeSharedSecret(pub nostr.PubKey, sk [32]byte) (sharedSecret []byte, err error) {
privKey, _ := btcec.PrivKeyFromBytes(sk[:])
// adding 02 to signal that this is a compressed public key (33 bytes)
pubKeyBytes, err := hex.DecodeString("02" + pub)
pubKey, err := btcec.ParsePubKey(append([]byte{2}, pub[:]...))
if err != nil {
return nil, fmt.Errorf("error decoding hex string of receiver public key '%s': %w", "02"+pub, err)
}
pubKey, err := btcec.ParsePubKey(pubKeyBytes)
if err != nil {
return nil, fmt.Errorf("error parsing receiver public key '%s': %w", "02"+pub, err)
return nil, fmt.Errorf("error parsing receiver public key '%s': %w", "02"+hex.EncodeToString(pub[:]), err)
}
return btcec.GenerateSharedSecret(privKey, pubKey), nil