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31 lines
709 B
Python
31 lines
709 B
Python
from pylokinet import bencode
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import pysodium
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import binascii
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import time
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def _expired(ts, lifetime=84600000):
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"""
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return True if a timestamp is considered expired
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lifetime is default 23.5 hours
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"""
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return (int(time.time()) * 1000) - ts >= lifetime
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def validate(data):
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rc = bencode.bdecode(data)
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if b'z' not in rc or b'k' not in rc:
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return False
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sig = rc[b'z']
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rc[b'z'] = b'\x00' * 64
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buf = bencode.bencode(rc)
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try:
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k = rc[b'k']
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pysodium.crypto_sign_verify_detached(sig, buf, k)
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except:
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return False
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else:
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return not _expired(rc[b't'])
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def get_pubkey(data):
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rc = bencode.bdecode(data)
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if b'k' in rc:
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return binascii.hexlify(rc[b'k']).decode('ascii') |