forked from LBRYCommunity/lbry-sdk
67 lines
2.3 KiB
Python
67 lines
2.3 KiB
Python
import logging
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import time
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import hashlib
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import binascii
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import ecdsa
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from lbry import utils
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from lbry.crypto.hash import sha256
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from lbry.wallet.transaction import Output
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log = logging.getLogger(__name__)
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def get_encoded_signature(signature):
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signature = signature.encode() if isinstance(signature, str) else signature
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r = int(signature[:int(len(signature) / 2)], 16)
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s = int(signature[int(len(signature) / 2):], 16)
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return ecdsa.util.sigencode_der(r, s, len(signature) * 4)
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def cid2hash(claim_id: str) -> bytes:
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return binascii.unhexlify(claim_id.encode())[::-1]
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def is_comment_signed_by_channel(comment: dict, channel: Output, abandon=False):
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if isinstance(channel, Output):
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try:
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signing_field = comment['comment_id'] if abandon else comment['comment']
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pieces = [
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comment['signing_ts'].encode(),
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cid2hash(comment['channel_id']),
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signing_field.encode()
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]
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return Output.is_signature_valid(
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get_encoded_signature(comment['signature']),
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sha256(b''.join(pieces)),
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channel.claim.channel.public_key_bytes
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)
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except KeyError:
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pass
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return False
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def sign_comment(comment: dict, channel: Output, abandon=False):
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timestamp = str(int(time.time()))
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signing_field = comment['comment_id'] if abandon else comment['comment']
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pieces = [timestamp.encode(), channel.claim_hash, signing_field.encode()]
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digest = sha256(b''.join(pieces))
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signature = channel.private_key.sign_digest_deterministic(digest, hashfunc=hashlib.sha256)
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comment.update({
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'signature': binascii.hexlify(signature).decode(),
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'signing_ts': timestamp
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})
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async def jsonrpc_post(url: str, method: str, params: dict = None, **kwargs) -> any:
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params = params or {}
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params.update(kwargs)
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json_body = {'jsonrpc': '2.0', 'id': None, 'method': method, 'params': params}
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async with utils.aiohttp_request('POST', url, json=json_body) as response:
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try:
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result = await response.json()
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return result['result'] if 'result' in result else result
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except Exception as cte:
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log.exception('Unable to decode response from server: %s', cte)
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return await response.text()
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