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SHA-1 can be written in fewer than 100 lines of code. Just add a basic
SHA-1 implementation so that there's no need to use an external library
or try to pull in the kernel's SHA-1 implementation. The kernel's SHA-1
implementation is not really intended to be pulled into userspace
programs in the way that it was proposed to do so for perf
(https://lore.kernel.org/r/20250521225307.743726-3-yuzhuo@google.com/),
and it's also likely to undergo some refactoring in the future. There's
no need to tie userspace tools to it.
Include a test for sha1() in the util test suite.
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20250625202311.23244-3-ebiggers@kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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