(unmasked: bytes)
| 45 | |
| 46 | |
| 47 | def masked_bytes(unmasked: bytes) -> bytes: |
| 48 | header = bytearray(unmasked[:2]) |
| 49 | assert header[1] < 126 # assert that this is neither masked nor extended payload |
| 50 | header[1] |= 0b1000_0000 |
| 51 | mask = secrets.token_bytes(4) |
| 52 | masked = bytes(x ^ mask[i % 4] for i, x in enumerate(unmasked[2:])) |
| 53 | return bytes(header + mask + masked) |
| 54 | |
| 55 | |
| 56 | def test_masking(): |
no outgoing calls
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