90 lines
2.2 KiB
Python
90 lines
2.2 KiB
Python
import hashlib
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from typing import Union
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import base58
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import multihash
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from Crypto.PublicKey.RSA import RsaKey
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# MaxInlineKeyLength is the maximum length a key can be for it to be inlined in
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# the peer ID.
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# * When `len(pubKey.Bytes()) <= MaxInlineKeyLength`, the peer ID is the
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# identity multihash hash of the public key.
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# * When `len(pubKey.Bytes()) > MaxInlineKeyLength`, the peer ID is the
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# sha2-256 multihash of the public key.
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MAX_INLINE_KEY_LENGTH = 42
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class ID:
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_id_str: bytes
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def __init__(self, id_str: bytes) -> None:
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self._id_str = id_str
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def to_bytes(self) -> bytes:
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return self._id_str
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def get_raw_id(self) -> bytes:
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return self._id_str
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def pretty(self) -> str:
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return base58.b58encode(self._id_str).decode()
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def get_xor_id(self) -> int:
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return int(digest(self.get_raw_id()).hex(), 16)
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def __str__(self) -> str:
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pid = self.pretty()
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return pid
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__repr__ = __str__
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def __eq__(self, other: object) -> bool:
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# pylint: disable=protected-access
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if not isinstance(other, ID):
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return NotImplemented
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return self._id_str == other._id_str
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def __hash__(self) -> int:
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return hash(self._id_str)
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def id_b58_encode(peer_id: ID) -> str:
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"""
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return a b58-encoded string
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"""
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# pylint: disable=protected-access
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return base58.b58encode(peer_id.get_raw_id()).decode()
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def id_b58_decode(peer_id_str: str) -> ID:
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"""
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return a base58-decoded peer ID
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"""
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return ID(base58.b58decode(peer_id_str))
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def id_from_public_key(key: RsaKey) -> ID:
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# export into binary format
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key_bin = key.exportKey("DER")
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algo: int = multihash.Func.sha2_256
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# TODO: seems identity is not yet supported in pymultihash
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# if len(b) <= MAX_INLINE_KEY_LENGTH:
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# algo multihash.func.identity
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mh_digest: multihash.Multihash = multihash.digest(key_bin, algo)
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return ID(mh_digest.encode())
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def id_from_private_key(key: RsaKey) -> ID:
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return id_from_public_key(key.publickey())
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def digest(data: Union[str, bytes]) -> bytes:
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if isinstance(data, str):
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data = data.encode("utf8")
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return hashlib.sha1(data).digest()
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