예제 #1
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    def derive(self, index, hardened=False):
        # TODO Is index Valid?

        if index < HARDENED_START and hardened:
            index += HARDENED_START

        if hardened:
            raise ValueError(
                "Hardened derivation is not posible on HDPublicKey")
        else:
            key = self.to_public_key().to_bytes()

        signed64 = hmac.new(self.chain, key + to_bytes(self.index, length=4),
                            hashlib.sha512).digest()

        x, y = self.pubkey.pair
        curve = utils.generator_secp256k1
        point = int_from_bytes(signed64[:32]) * curve + utils.Point(
            curve.curve(), x, y, curve.order())
        pubkey = PublicKey((point.x(), point.y()), self.network)

        chain = signed64[32:]
        depth = self.depth + 1

        return HDPublicKey(pubkey, chain, depth, index, self.fingerprint,
                           self.network)
예제 #2
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    def fromSeed(seed = None):
        if seed is None:
            seed = os.urandom(MIN_SEED_LEN)

        if len(seed) < MIN_SEED_LEN:
            raise ValueError("HDPublicKey seed must be at least 32 bytes long")

        signed64 = hmac.new(HMAC_MAGIC_KEY, seed, hashlib.sha512).digest()

        return HDPublicKey(pubkey = PublicKey.from_bytes(signed64[:32]), chain = signed64[32:])
예제 #3
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    def fromSeed(seed=None):
        if seed is None:
            seed = os.urandom(MIN_SEED_LEN)

        if len(seed) < MIN_SEED_LEN:
            raise ValueError("HDPublicKey seed must be at least 32 bytes long")

        signed64 = hmac.new(HMAC_MAGIC_KEY, seed, hashlib.sha512).digest()

        return HDPublicKey(pubkey=PublicKey.from_bytes(signed64[:32]),
                           chain=signed64[32:])
예제 #4
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    def from_string(b58_str):
        data = utils.encoding.a2b_hashed_base58(b58_str) # TODO checksum?

        chain   = data[HDPublicKey.ChainCodeStart : HDPublicKey.ChainCodeEnd]
        depth   = int_from_bytes(data[HDPublicKey.DepthStart : HDPublicKey.DepthEnd])
        index   = int_from_bytes(data[HDPublicKey.ChildIndexStart : HDPublicKey.ChildIndexEnd])
        parent  = int_from_bytes(data[HDPublicKey.ParentFingerPrintStart : HDPublicKey.ParentFingerPrintEnd])

        # The version field is used to deduce the network:
        version = int_from_bytes(data[HDPublicKey.VersionStart:HDPublicKey.VersionEnd])
        network = Network.get_by_field('hd_public_key', version)
        pubkey  = PublicKey.from_bytes(data[HDPublicKey.PublicKeyStart : HDPublicKey.PublicKeyEnd], network)

        return HDPublicKey(pubkey, chain, depth, index, parent, network)
예제 #5
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    def from_string(b58_str):
        data = utils.encoding.a2b_hashed_base58(b58_str)  # TODO checksum?

        chain = data[HDPublicKey.ChainCodeStart:HDPublicKey.ChainCodeEnd]
        depth = int_from_bytes(
            data[HDPublicKey.DepthStart:HDPublicKey.DepthEnd])
        index = int_from_bytes(
            data[HDPublicKey.ChildIndexStart:HDPublicKey.ChildIndexEnd])
        parent = int_from_bytes(
            data[HDPublicKey.ParentFingerPrintStart:HDPublicKey.
                 ParentFingerPrintEnd])

        # The version field is used to deduce the network:
        version = int_from_bytes(
            data[HDPublicKey.VersionStart:HDPublicKey.VersionEnd])
        network = Network.get_by_field('hd_public_key', version)
        pubkey = PublicKey.from_bytes(
            data[HDPublicKey.PublicKeyStart:HDPublicKey.PublicKeyEnd], network)

        return HDPublicKey(pubkey, chain, depth, index, parent, network)
예제 #6
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파일: privkey.py 프로젝트: maraoz/bitforge
 def to_public_key(self):
     return PublicKey.from_private_key(self)