31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
import secrets
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from typing import Callable
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from libp2p.crypto.keys import KeyPair
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from libp2p.peer.id import ID
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from libp2p.security.secure_transport_interface import ISecureTransport
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def default_secure_bytes_provider(n: int) -> bytes:
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return secrets.token_bytes(n)
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class BaseSecureTransport(ISecureTransport):
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"""
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``BaseSecureTransport`` is not fully instantiated from its abstract classes
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as it is only meant to be used in clases that derive from it.
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Clients can provide a strategy to get cryptographically secure bytes
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of a given length. A default implementation is provided using the
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``secrets`` module from the standard library.
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"""
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def __init__(
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self,
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local_key_pair: KeyPair,
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secure_bytes_provider: Callable[[int], bytes] = default_secure_bytes_provider,
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) -> None:
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self.local_private_key = local_key_pair.private_key
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self.local_peer = ID.from_pubkey(local_key_pair.public_key)
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self.secure_bytes_provider = secure_bytes_provider
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