Golang C.secp256k1_ec_seckey_verify类(方法)实例源码

func Sign(msg []byte, seckey []byte) ([]byte, error) {
	nonce := randentropy.GetEntropyCSPRNG(32)

	var sig []byte = make([]byte, 65)
	var recid C.int

	var msg_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&msg[0]))
	var sig_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&sig[0]))
	var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))

	var noncefp_ptr = &(*C.secp256k1_nonce_function_default)
	var ndata_ptr = unsafe.Pointer(&nonce[0])

	if C.secp256k1_ec_seckey_verify(seckey_ptr) != C.int(1) {
		return nil, errors.New("Invalid secret key")
	}

	ret := C.secp256k1_ecdsa_sign_compact(
		msg_ptr,
		sig_ptr,
		seckey_ptr,
		noncefp_ptr,
		ndata_ptr,
		&recid)

	sig[64] = byte(int(recid))

	if ret != C.int(1) {
		// nonce invalid, retry
		return Sign(msg, seckey)
	}

	return sig, nil

}

func VerifySeckeyValidity(seckey []byte) error {
	if len(seckey) != 32 {
		return errors.New("priv key is not 32 bytes")
	}
	var seckey_ptr *C.uchar = (*C.uchar)(unsafe.Pointer(&seckey[0]))
	ret := C.secp256k1_ec_seckey_verify(seckey_ptr)
	if int(ret) != 1 {
		return errors.New("invalid seckey")
	}
	return nil
}

func Sign(msg []byte, seckey []byte) ([]byte, error) {
	msg_ptr := (*C.uchar)(unsafe.Pointer(&msg[0]))
	seckey_ptr := (*C.uchar)(unsafe.Pointer(&seckey[0]))

	sig := make([]byte, 65)
	sig_ptr := (*C.secp256k1_ecdsa_recoverable_signature)(unsafe.Pointer(&sig[0]))

	nonce := randentropy.GetEntropyCSPRNG(32)
	ndata_ptr := unsafe.Pointer(&nonce[0])

	noncefp_ptr := &(*C.secp256k1_nonce_function_default)

	if C.secp256k1_ec_seckey_verify(context, seckey_ptr) != C.int(1) {
		return nil, errors.New("Invalid secret key")
	}

	ret := C.secp256k1_ecdsa_sign_recoverable(
		context,
		sig_ptr,
		msg_ptr,
		seckey_ptr,
		noncefp_ptr,
		ndata_ptr,
	)

	if ret == C.int(0) {
		return Sign(msg, seckey) //invalid secret, try again
	}

	sig_serialized := make([]byte, 65)
	sig_serialized_ptr := (*C.uchar)(unsafe.Pointer(&sig_serialized[0]))
	var recid C.int

	C.secp256k1_ecdsa_recoverable_signature_serialize_compact(
		context,
		sig_serialized_ptr, // 64 byte compact signature
		&recid,
		sig_ptr, // 65 byte "recoverable" signature
	)

	sig_serialized[64] = byte(int(recid)) // add back recid to get 65 bytes sig

	return sig_serialized, nil

}

func Seckey_verify(seckey [32]byte) bool {
	success := C.secp256k1_ec_seckey_verify(cBuf(seckey[:]))
	return goBool(success)
}