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Change the "out" parameter from uint8_t[8] to uint64_t. On architectures which
enforce pointer alignment this fixes crashes when we previously cast an
unaligned array to uint64_t*, and on others this should at least improve
performance as the compiler now aligns these properly.
This also simplifies the code in most cases by getting rid of typecasts. The
only place which we can't change is struct duid's en.id, as that is _packed_
and public API, so we can't enforce alignment of the "id" field and have to
use memcpy instead.
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Use unaligned_read_le64() to access input buffer when reading complete
64-bit words.
This should fix memory traps on platforms with strict aliasing.
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Drop custom types. Drop unnecessary macros. Fix whitespace. Add asserts.
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Make the API of the new helpers more similar to the old wrapper.
In particular we now return the hash as a byte string to avoid
any endianness problems.
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This allows the input to siphash24_compress to be decomposed into
smaller chunks and the function to be called on each individual
chunk.
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finalization step
The last compression is special as it deals with the length byte, and padding. Move
it to the finalization step in preparation for making compression decomposable.
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Encapsulate the four state variables in a struct so we can more easily pass
them around.
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basic/ can be used by everything
cannot use anything outside of basic/
libsystemd/ can use basic/
cannot use shared/
shared/ can use libsystemd/
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