56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
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package nostr
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import (
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"crypto/rand"
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"encoding/hex"
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"fmt"
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"io"
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"math/big"
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"strings"
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"github.com/btcsuite/btcd/btcec/v2"
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"github.com/btcsuite/btcd/btcec/v2/schnorr"
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)
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func GeneratePrivateKey() string {
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params := btcec.S256().Params()
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one := new(big.Int).SetInt64(1)
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b := make([]byte, params.BitSize/8+8)
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if _, err := io.ReadFull(rand.Reader, b); err != nil {
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return ""
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}
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k := new(big.Int).SetBytes(b)
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n := new(big.Int).Sub(params.N, one)
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k.Mod(k, n)
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k.Add(k, one)
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return fmt.Sprintf("%064x", k.Bytes())
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}
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func GetPublicKey(sk string) (string, error) {
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b, err := hex.DecodeString(sk)
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if err != nil {
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return "", err
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}
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_, pk := btcec.PrivKeyFromBytes(b)
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return hex.EncodeToString(schnorr.SerializePubKey(pk)), nil
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}
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// Deprecated: use IsValid32ByteHex instead -- functionality unchanged.
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func IsValidPublicKeyHex(pk string) bool {
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if strings.ToLower(pk) != pk {
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return false
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}
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dec, _ := hex.DecodeString(pk)
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return len(dec) == 32
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}
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func IsValidPublicKey(pk string) bool {
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v, _ := hex.DecodeString(pk)
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_, err := schnorr.ParsePubKey(v)
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return err == nil
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}
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