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test_chunkpoints_unchanged: do not use blake2b_256

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we want to get rid of legacy stuff(*) one day and sha256 is as
good for this purpose (and might be even hw accelerated).

(*) considered legacy due to the way it gives the key to the
blake2b function (just padding and prepending it to the data,
instead of using the key parameter, see #8867 ).
This commit is contained in:
Thomas Waldmann 2025-05-29 16:46:22 +02:00
parent c59edd487e
commit ce9ee2eef3
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GPG key ID: 243ACFA951F78E01
1 changed files with 9 additions and 5 deletions
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14
src/borg/testsuite/chunker_slow.py
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@ -1,13 +1,17 @@
from hashlib import sha256
from io import BytesIO
from binascii import unhexlify
from .chunker import cf
from ..chunker import Chunker
from ..crypto.low_level import blake2b_256
from ..constants import * # NOQA
from . import BaseTestCase
def H(data):
return sha256(data).digest()
class ChunkerRegressionTestCase(BaseTestCase):
def test_chunkpoints_unchanged(self):
@ -31,10 +35,10 @@ class ChunkerRegressionTestCase(BaseTestCase):
for seed in (1849058162, 1234567653):
fh = BytesIO(data)
chunker = Chunker(seed, minexp, maxexp, maskbits, winsize)
chunks = [blake2b_256(b'', c) for c in cf(chunker.chunkify(fh, -1))]
runs.append(blake2b_256(b'', b''.join(chunks)))
chunks = [H(c) for c in cf(chunker.chunkify(fh, -1))]
runs.append(H(b''.join(chunks)))
# The "correct" hash below matches the existing chunker behavior.
# Future chunker optimisations must not change this, or existing repos will bloat.
overall_hash = blake2b_256(b'', b''.join(runs))
self.assert_equal(overall_hash, unhexlify("b559b0ac8df8daaa221201d018815114241ea5c6609d98913cd2246a702af4e3"))
overall_hash = H(b''.join(runs))
self.assert_equal(overall_hash, unhexlify("a43d0ecb3ae24f38852fcc433a83dacd28fe0748d09cc73fc11b69cf3f1a7299"))