Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

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

Cleanup of userland __P use

Commit IPv6 support for FAST_IPSEC to the tree.
This commit includes all remaining changes for the time being including
user space updates.

Submitted by: bz
Approved by: re

Integrate the Camellia Block Cipher. For more information see RFC 4132
and its bibliography.

Submitted by: Tomoyuki Okazaki <okazaki at kick dot gr dot jp>
MFC after: 1 month

Fixed mispellings of '\0' as NULL.

Initial import of RFC 2385 (TCP-MD5) digest support.

This is the second of two commits; bring in the userland support to finish.

Teach libipsec and setkey about the tcp-md5 class of security associations,
thus allowing administrators to add per-host keys to the SADB for use by
the tcpsignature_compute() function.

Document that a single SPI must be used until such time as the code which
adds support to the SPD to specify flows for tcp-md5 treatment is suitable
for production.

Sponsored by: sentex.net

- do hexdump on send. set length field properly
- check for encryption/authentication key together with algorithm.
- warned if a deprecated encryption algorithm (that includes "simple")
is specified.
- changed the syntax how to define a policy of a ICMPv6 type and/or a
code, like spdadd ::/0 ::/0 icmp6 134,0 -P out none;
- random cleanup in parser.
- use yyfatal, or return -1 after yyerror.
- deal with strdup() failure.
- permit scope notation in policy string (-P
esp/tunnel/foo%scope-bar%scope/use)
- simplify /prefix and [port].
- g/c some unused symbols.

Obtained from: KAME

- support AES counter mode for ESP.
- use size_t as return type of schedlen(), as there's no error
check needed.
- clear key schedule buffer before freeing.

Obtained from: KAME

- support AES XCBC MAC for AH
- correct SADB_X_AALG_RIPEMD160HMAC to 8

Obtained from: KAME

- RIPEMD160 support
- pass size arg to ah->result (avoid assuming result buffer size)

Obtained from: KAME

Sync with recent KAME.
This work was based on kame-20010528-freebsd43-snap.tgz and some
critical problem after the snap was out were fixed.
There are many many changes since last KAME merge.

TODO:
- The definitions of SADB_* in sys/net/pfkeyv2.h are still different
from RFC2407/IANA assignment because of binary compatibility
issue. It should be fixed under 5-CURRENT.
- ip6po_m member of struct ip6_pktopts is no longer used. But, it
is still there because of binary compatibility issue. It should
be removed under 5-CURRENT.

Reviewed by: itojun
Obtained from: KAME
MFC after: 3 weeks

Allow ``ip4'' as an ``upperspec'' value, and update the man
page with *all* the permissible values.

This should really be spelt ipencap (as /etc/protocols does),
but a precedent has already been set by the ipproto array in
setkey.c.

It would be nice if /etc/protocols was parsed for the upperspec
field, but I don't do yacc/lex...

This change allows policies that only encrypt the encapsulated
packets passing between the endpoints of a gif tunnel. Setting
such a policy means that you can still talk directly (and
unencrypted) between the public IP numbers with (say) ssh.

MFC after: 1 week

synchronize with latest kame tree.

behavior change: policy syntax was changed. you may need to update your
setkey(8) configuration files.

Change IPv6 scoped addr format again based on recent standard discussion.
Sorry for the flapping, but no change will be done for 4.0 anymore.
Official standard will be published around April or later.
If different format would be adopted at that time, then support for
the new format will be added to the succeeding FreeBSD 4.x.

Approved by: jkh

libipsec and IPsec related apps. (and some KAME related man pages)

Reviewed by: freebsd-arch, cvs-committers
Obtained from: KAME project