Modified version of the commit ffaef3f1

 in the master branch by Stephen
Henson. This makes the SSL_OP_SINGLE_DH_USE option a no-op and always
generates a new DH key for every handshake regardless.

This is a follow on from CVE-2016-0701. This branch is not impacted by
that CVE because it does not support X9.42 style parameters. It is still
possible to generate parameters based on primes that are not "safe",
although by default OpenSSL does not do this. The documentation does
sign post that using such parameters is unsafe if the private DH key is
reused. However to avoid accidental problems or future attacks this commit
has been backported to this branch.

Issue reported by Antonio Sanso

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>

For BSD systems, Configure adds a shared_ldflags including a reference
to the Makefile variable LIBRPATH, but since it must be passed down to
Makefile.shared, care must be taken so the value of LIBRPATH doesn't
get expanded too early, or it ends up giving an empty string.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit c64879d3)

RT#4080

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 02f70372)

Reviewed-by: Rich Salz <rsalz@openssl.org>

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit 9aa00b18)

Conflicts:
	apps/x509.c

Reviewed-by: Viktor Dukhovni <openssl-users@dukhovni.org>

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
(cherry picked from commit 1918e01c)

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 41977c53)

Describe the usage of the OCSP callback functions on both the client and
the server side.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit c52c3b5e)

It makes no sense to call the OCSP status callback if we are resuming a
session because no certificates will be sent.

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit 0ac62399)

If a server sends the status_request extension then it may choose
to send the CertificateStatus message. However this is optional.
We were treating it as mandatory and the connection was failing.

Thanks to BoringSSL for reporting this issue.

RT#4120

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(cherry picked from commit 905943af)

Found by clang scan-build.

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Richard Levitte <levitte@openssl.org>

RT: #4184, MR: #1496
(cherry picked from commit 679d8751)

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 6656ba71)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 17592f32)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 6d97060e)

No dummy arguments.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 7eb51251)

BIO_int_ctrl isn't made for the purpose BIO_get_conn_int_port used it
for.

This also changes BIO_C_GET_CONNECT to actually return the port
instead of assigning it to a pointer that was never returned back to
the caller.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 2a60fccd)

Fix some more URLs mangled by indent in the reformat. These ones don't exist
in master so we have a separate commit. Based on a patch supplied by Arnaud
Lacombe <al@aerilon.ca>

Reviewed-by: Richard Levitte <levitte@openssl.org>

Some URLs in the source code ended up getting mangled by indent. This fixes
it. Based on a patch supplied by Arnaud Lacombe <al@aerilon.ca>

Reviewed-by: Richard Levitte <levitte@openssl.org>

Since we don't use the eay style any more, there's no point tryint to
tell emacs to use it.

Reviewed-by: Ben Laurie <ben@openssl.org>

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 2e31ef03)

Commit 2b0180c3

 attempted to do this but
only hit one of many BN_mod_exp codepaths. Fix remaining variants and add
a test for each method.

Thanks to Hanno Boeck for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Dr. Stephen Henson <steve@openssl.org>
(cherry picked from commit d911097d)
(cherry picked from commit 44e4f5b0)

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 474a53b3)

A BIO_flush call in the DTLS code was not correctly setting the |rwstate|
variable to SSL_WRITING. This means that SSL_get_error() will not return
SSL_ERROR_WANT_WRITE in the event of an IO retry.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 67f60be8)

If using DTLS and NBIO then if a second or subsequent handshake message
fragment hits a retry, then the retry attempt uses the wrong fragment
offset value. This commit restores the fragment offset from the last
attempt.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 2ad226e8)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 10119938215298ad414468e7c2779d7fd1a0b979)

Reviewed-by: Steve Marquess <marquess@openssl.com>
(cherry picked from commit ab29c82a)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 3cd7aef3)

As part of this, move release creation to a script to be called from
.travis.yml.  That makes it much easier to test outside of travis.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 382af61f)

Introducing DISTTARVARS to propagate changed variables down to the
tar-making target.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 4d3c30a1)

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit c44844d9)

It seems like some tar versions don't like the name:id form for
--owner and --group.  The closest known anonymous user being 0 (root),
that seems to be the most appropriate user/group to assign ownership
to.  It matters very little when unpacking either way.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit b91dd150)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 451a5bdf)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 475fc3d8)

Make TARFILE include ../ instead of having that hard coded all over the place.
When transforming file names in TAR_COMMAND, use $(NAME) instead of openssl-$(VERSION)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 4a544810)

Reviewed-by: Richard Levitte <levitte@openssl.org>

Reviewed-by: Richard Levitte <levitte@openssl.org>

Reviewed-by: Richard Levitte <levitte@openssl.org>