libmd: re-apply masking of _Transform names

Visibility can get complicated when, e.g., ifuncs are involved. In
particular, SHA256/SHA512 on aarch64 use ifuncs for their _Transform
implementations,

libmd: re-apply masking of _Transform names

Visibility can get complicated when, e.g., ifuncs are involved. In
particular, SHA256/SHA512 on aarch64 use ifuncs for their _Transform
implementations, which then exposes global symbols of the same name that
break things trying to statically link both libcrypto and libmd.

Revert this part of the _Transform removal to fix the pkg-static build
on aarch64.

Fixes: 81de655acd2 ("libmd: stop exporting Transform() symbols")

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libmd: stop exporting _version symbols

These are reportedly likely to be specific to SSLeay's implementation
and likely not needed here. At the very least they shouldn't be used
by consumers, so le

libmd: stop exporting _version symbols

These are reportedly likely to be specific to SSLeay's implementation
and likely not needed here. At the very least they shouldn't be used
by consumers, so let's kick them out now while we're already prepared
for a libmd soversion bump.

Requested by: delphij, fuz

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libmd: stop exporting Transform() symbols

They're not documented in libmd and we don't have any consumers. It's
problematic to keep them exported, as we don't currently export their
implementations

libmd: stop exporting Transform() symbols

They're not documented in libmd and we don't have any consumers. It's
problematic to keep them exported, as we don't currently export their
implementations. Make them all private.

PR: 280784 (exp-run)
Reviewed by: fuz
Differential Revision: https://reviews.freebsd.org/D34503

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sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Merge ^/head r307383 through r307735.

Fix C++ includability of crypto headers with static array sizes

C99 allows array function parameters to use the static keyword for their
sizes. This tells the compiler that the parameter will have a

Fix C++ includability of crypto headers with static array sizes

C99 allows array function parameters to use the static keyword for their
sizes. This tells the compiler that the parameter will have at least the
specified size, and calling code will fail to compile if that guarantee is
not met. However, this syntax is not legal in C++.

This commit reverts r300824, which worked around the problem for
sys/sys/md5.h only, and introduces a new macro: min_size(). min_size(x) can
be used in headers as a static array size, but will still compile in C++
mode.

Reviewed by: cem, ed
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D8277

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libmd: introduce functions that operate on an fd instead of filename

Reviewed by: allanjude, cem
MFC after: 2 months
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freeb

libmd: introduce functions that operate on an fd instead of filename

Reviewed by: allanjude, cem
MFC after: 2 months
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D8264

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Implement SHA-512 truncated (224 and 256 bits)

This implements SHA-512/256, which generates a 256 bit hash by
calculating the SHA-512 then truncating the result. A different initial
value is used, m

Implement SHA-512 truncated (224 and 256 bits)

This implements SHA-512/256, which generates a 256 bit hash by
calculating the SHA-512 then truncating the result. A different initial
value is used, making the result different from the first 256 bits of
the SHA-512 of the same input. SHA-512 is ~50% faster than SHA-256 on
64bit platforms, so the result is a faster 256 bit hash.

The main goal of this implementation is to enable support for this
faster hashing algorithm in ZFS. The feature was introduced into ZFS
in r289422, but is disconnected because SHA-512/256 support was missing.
A further commit will enable it in ZFS.

This is the follow on to r292782

Reviewed by: cem
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D6061

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