Golang secp256k1_ecdsa_sign_compactの例

コード例 #1

ファイル: secp256.go プロジェクト: JmAbuDabi/skycoin

//generate signature in repeatable way
func SignDeterministic(msg []byte, seckey []byte, nonce_seed []byte) []byte {
	nonce := SumSHA256(nonce_seed) //deterministicly generate nonce

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

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

	if C.secp256k1_ecdsa_seckey_verify(seckey_ptr) != C.int(1) {
		log.Panic("Invalid secret key")
	}

	ret := C.secp256k1_ecdsa_sign_compact(
		msg_ptr, C.int(len(msg)),
		sig_ptr,
		seckey_ptr,
		nonce_ptr,
		&recid)

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

	if int(recid) > 4 {
		log.Panic()
	}

	if ret != 1 {
		return SignDeterministic(msg, seckey, nonce_seed) //nonce invalid,retry
	}

	return sig
}

コード例 #2

ファイル: secp256.go プロジェクト: readevalprint/eris-db

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

}

コード例 #3

ファイル: secp256.go プロジェクト: RagnarDanneskjold/skycoin

func Sign(msg []byte, seckey []byte) []byte {
	var nonce []byte = RandByte(32)

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

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

	if C.secp256k1_ecdsa_seckey_verify(seckey_ptr) != C.int(1) {
		log.Panic("Invalid secret key")
	}

	ret := C.secp256k1_ecdsa_sign_compact(
		msg_ptr, C.int(len(msg)),
		sig_ptr,
		seckey_ptr,
		nonce_ptr,
		&recid)

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

	if int(recid) > 4 {
		log.Panic()
	}

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

	return sig
}

コード例 #4

ファイル: secp256.go プロジェクト: JmAbuDabi/skycoin

//Rename SignHash
func Sign(msg []byte, seckey []byte) []byte {

	if len(seckey) != 32 {
		log.Panic("Sign, Invalid seckey length")
	}
	if msg == nil {
		log.Panic("Sign, message nil")
	}
	var nonce []byte = RandByte(32) //going to get bitcoins stolen!

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

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

	if C.secp256k1_ecdsa_seckey_verify(seckey_ptr) != C.int(1) {
		log.Panic() //invalid seckey
	}

	ret := C.secp256k1_ecdsa_sign_compact(
		msg_ptr, C.int(len(msg)),
		sig_ptr,
		seckey_ptr,
		nonce_ptr,
		&recid)

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

	if int(recid) > 4 {
		log.Panic()
	}

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

	return sig
}