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a bunch of [32]byte conversions. still more needed.

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This commit is contained in:
fiatjaf
2025-04-14 17:31:23 -03:00
parent 40535e6b19
commit b4268d649c
132 changed files with 857 additions and 879 deletions
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37
signature_libsecp256k1.go
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@@ -26,7 +26,6 @@ import "C"
import (
"crypto/rand"
"crypto/sha256"
"encoding/hex"
"errors"
"fmt"
"unsafe"
@@ -35,61 +34,41 @@ import (
)
func (evt Event) CheckSignature() (bool, error) {
var pk [32]byte
_, err := hex.Decode(pk[:], []byte(evt.PubKey))
if err != nil {
return false, fmt.Errorf("event pubkey '%s' is invalid hex: %w", evt.PubKey, err)
}
var sig [64]byte
_, err = hex.Decode(sig[:], []byte(evt.Sig))
if err != nil {
return false, fmt.Errorf("event signature '%s' is invalid hex: %w", evt.Sig, err)
}
msg := sha256.Sum256(evt.Serialize())
var xonly C.secp256k1_xonly_pubkey
if C.secp256k1_xonly_pubkey_parse(globalSecp256k1Context, &xonly, (*C.uchar)(unsafe.Pointer(&pk[0]))) != 1 {
if C.secp256k1_xonly_pubkey_parse(globalSecp256k1Context, &xonly, (*C.uchar)(unsafe.Pointer(&evt.PubKey[0]))) != 1 {
return false, fmt.Errorf("failed to parse xonly pubkey")
}
res := C.secp256k1_schnorrsig_verify(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&sig[0])), (*C.uchar)(unsafe.Pointer(&msg[0])), 32, &xonly)
res := C.secp256k1_schnorrsig_verify(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&evt.Sig[0])), (*C.uchar)(unsafe.Pointer(&msg[0])), 32, &xonly)
return res == 1, nil
}
func (evt *Event) Sign(secretKey string, signOpts ...schnorr.SignOption) error {
sk, err := hex.DecodeString(secretKey)
if err != nil {
return fmt.Errorf("Sign called with invalid secret key '%s': %w", secretKey, err)
}
// Sign signs an event with a given privateKey.
func (evt *Event) Sign(secretKey [32]byte, signOpts ...schnorr.SignOption) error {
if evt.Tags == nil {
evt.Tags = make(Tags, 0)
}
var keypair C.secp256k1_keypair
if C.secp256k1_keypair_create(globalSecp256k1Context, &keypair, (*C.uchar)(unsafe.Pointer(&sk[0]))) != 1 {
if C.secp256k1_keypair_create(globalSecp256k1Context, &keypair, (*C.uchar)(unsafe.Pointer(&secretKey[0]))) != 1 {
return errors.New("failed to parse private key")
}
var xonly C.secp256k1_xonly_pubkey
var pk [32]byte
C.secp256k1_keypair_xonly_pub(globalSecp256k1Context, &xonly, nil, &keypair)
C.secp256k1_xonly_pubkey_serialize(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&pk[0])), &xonly)
evt.PubKey = hex.EncodeToString(pk[:])
C.secp256k1_xonly_pubkey_serialize(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&evt.PubKey[0])), &xonly)
h := sha256.Sum256(evt.Serialize())
var sig [64]byte
var random [32]byte
rand.Read(random[:])
if C.secp256k1_schnorrsig_sign32(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&sig[0])), (*C.uchar)(unsafe.Pointer(&h[0])), &keypair, (*C.uchar)(unsafe.Pointer(&random[0]))) != 1 {
if C.secp256k1_schnorrsig_sign32(globalSecp256k1Context, (*C.uchar)(unsafe.Pointer(&evt.Sig[0])), (*C.uchar)(unsafe.Pointer(&h[0])), &keypair, (*C.uchar)(unsafe.Pointer(&random[0]))) != 1 {
return errors.New("failed to sign message")
}
evt.ID = hex.EncodeToString(h[:])
evt.Sig = hex.EncodeToString(sig[:])
evt.ID = h
return nil
}