MFH (r314554): fix date in previous commit

MFH (r314528): update to reflect the state of SHA-1

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

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

Replace sys/crypto/sha2/sha2.c with lib/libmd/sha512c.c

cperciva's libmd implementation is 5-30% faster

The same was done for SHA256 previously in r263218

cperciva's implementation was lacking SHA-384 which I implemented, validated against OpenSSL and the NIST documentation

Extend sbin/md5 to create sha384(1)

Chase dependancies on sys/crypto/sha2/sha2.{c,h} and replace them with sha512{c.c,.h}

Reviewed by: cperciva, des, delphij
Approved by: secteam, bapt (mentor)
MFC after: 2 weeks
Sponsored by: ScaleEngine Inc.
Differential Revision: https://reviews.freebsd.org/D3929

use .Mt to mark up email addresses consistently (part1)

PR: 191174
Submitted by: Franco Fichtner <franco@lastsummer.de>

Assorted updates to md5.1

Note that the -c argument's parameter is compared against the digest of
the file, not the file. [1]

Update the "current time" parentheticals for notes about reversing
and colliding the hash functions. [1]

Some general mdoc updates.

PR: docs/188043 [1]
Submitted by: Jamie Landeg-Jones [1]
Approved by: hrs (mentor)
MFC after: 1 week

Teach md5(1) about sha512.

MFC after: 1 month

General mdoc(7) and typo fixes.

PR: 167696
Submitted by: Nobuyuki Koganemaru (kogane!jp.freebsd.org)
MFC after: 3 days

- new sentence should start on new line.

PR: bin/146541
Submitted by: bjk
Approved by: bjk

- add "check" option to MD5 and friends to compare files against known hash.

PR: bin/146541
Submitted by: eadler
Reviewed by: jhell@dataix.net
Approved by: secteam (cperciva)
Approved by: cperciva
MFC after: 3 weeks

Minor markup fix for the r186836 update.

Strengthen some of the language concerning attacks on MD5, in light of the
recent demonstration of a forged SSL certificate. Add text pointing out
that SHA-1 is at least theoretically broken. Add a recommendation that
new applications use SHA-256.

MFC after: 1 month

Bring a paragraph in this manual page a bit closer to the present date.

Discussed with: des

Belatedly update the md5(1) man page to reflect the addition of sha256.

Added the EXIT STATUS section where appropriate.

mdoc(7) fixes.

Add sha1 and rmd160 checksum tools.

Since the algorithms are already supported in libmd,
the size increase is small when a dynamic root is used.

Approved by: joerg, ru
MFC after: 2 weeks

Assorted markup, grammar, and spelling fixes.

Set exit code to 1 in case at least one of the input files
could not be opened.

Use `The .Nm utility'

mdoc(7) police: removed hard sentence breaks.

Mention collision attacks on MD5. From the md5(3) man page.

PR: docs/14158
Reviewed by: kris
Submitted by: Eric Frias <efrias@sg505.net>

mdoc(7) police:

Avoid using parenthesis enclosure macros (.Pq and .Po/.Pc) with plain text.
Not only this slows down the mdoc(7) processing significantly, but it also
has an undesired (in this case) effect of disabling hyphenation within the
entire enclosed block.

Remove whitespace at EOL.

This command has more than four options.

mdoc(7) police: use the default ``file ...'' feature of the .Ar macro.

mdoc(7) police: use the new features of the Nm macro.

Add -q quite mode.

Make `-r -s' also match the BSDI output.

Add a new "-r" (right) option that reverses the order a filename and the
hash is printed. This aids visual diffs.

Correct use of .Nm. Spelling. Add rcsid, remove unused #includes, use err(3).

Get md5(1) to use getopt(3). Also some minor -Wall cleaning
while here.

PR: 5387
Submitted by: Matthew Hunt <mph@pobox.com>

fix a few spelling changes

Submitted by: Josh Gilliam

Closes PR's: 4429, 4431-4438

PS: He has agreed to submit all contrib fixes back to the original author.

mdoc'ify man page

Add a '-p' option to md5. This will save some time in generation of the
ctm deltas.

Changed a sum(1) to a cksum(1).

This commit was generated by cvs2svn to compensate for changes in r3995,
which included commits to RCS files with non-trunk default branches.

Incorproate version of md5 placed into public domain by RSA.