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Add a test case which reproduces the bug fixed by commit 24f07e8c07a0
("lib/crypto: arm64: Fix lost Poly1305 carry when resuming NEON state").
It is written in a fairly general way, such that it should also be able
to reproduce similar bugs in other implementations.
Update the comment on test_poly1305_allones_keys_and_message() to more
accurately describe what it does and differentiate it from the new test.
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20261009125354.315476-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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Make the test cases more self-contained by replacing the test suite
scoped guarded buffer ('test_buf') with buffers allocated by each test
case using the helper functions in test-utils.h.
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://patch.msgid.link/20260802233005.161467-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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Add a KUnit test suite for the Poly1305 functions. Most of its test
cases are instantiated from hash-test-template.h, which is also used by
the SHA-2 tests. A couple additional test cases are also included to
test edge cases specific to Poly1305.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20250709200112.258500-5-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
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