LeoVasanko
9d36d3b81b
Each cipher module's random() now returns a thread-local Random that is created on first use and reused thereafter. Each thread gets its own OS-seeded generator (own key+nonce), so no locking and no cross-thread nonce collisions. random_key() and random_nonce() draw from this CSPRNG instead of secrets.token_bytes, making them as fast as the stream. Changes made in the aegis256x4.py template and regenerated.
57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
import threading
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import pytest
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from aeg import aegis128l, aegis128x2, aegis128x4, aegis256, aegis256x2, aegis256x4
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CIPHERS = [aegis128l, aegis128x2, aegis128x4, aegis256, aegis256x2, aegis256x4]
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def cipher_id(c):
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return c.NAME
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@pytest.mark.parametrize("c", CIPHERS, ids=cipher_id)
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def test_random_is_per_thread_singleton(c):
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assert c.random() is c.random()
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other = []
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t = threading.Thread(target=lambda: other.append(c.random()))
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t.start()
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t.join()
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assert other[0] is not c.random()
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@pytest.mark.parametrize("c", CIPHERS, ids=cipher_id)
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def test_random_key_nonce_from_csprng(c):
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assert len(c.random_key()) == c.KEYBYTES
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assert len(c.random_nonce()) == c.NONCEBYTES
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# successive outputs never repeat
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assert c.random_key() != c.random_key()
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assert c.random_nonce() != c.random_nonce()
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@pytest.mark.parametrize("c", CIPHERS, ids=cipher_id)
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def test_threads_get_independent_streams(c):
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results = [None] * 2
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def work(i):
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results[i] = bytes(c.random_key())
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threads = [threading.Thread(target=work, args=(i,)) for i in range(2)]
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for t in threads:
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t.start()
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for t in threads:
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t.join()
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assert results[0] != results[1]
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@pytest.mark.parametrize("c", CIPHERS, ids=cipher_id)
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def test_bytes_into_callable(c):
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rng = c.random()
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a = rng.bytes(64)
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buf = bytearray(64)
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rng.into(buf)
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b = rng(64)
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assert len(a) == len(b) == 64
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assert a != bytes(buf) != b # three consecutive blocks differ
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