Backport to 1.0.1 and 1.0.2 to fix RT 3905

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 8e6bb999)

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
(cherry picked from commit b4f0d1a4)

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
(cherry picked from commit 30cf9178)

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

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

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

It is valid for an extension block to be present in a ClientHello, but to
be of zero length.

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

Recent HMAC changes broke ABI compatibility due to a new field in HMAC_CTX.
This backs that change out, and does it a different way.

Thanks to Timo Teras for the concept.

Conflicts:
	crypto/hmac/hmac.c

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

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

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

CVE-2015-1788

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 4924b37e)

Updates to CHANGES and NEWS to take account of the latest security fixes.

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

CVE-2015-1790

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

Also tighten X509_cmp_time to reject more than three fractional
seconds in the time; and to reject trailing garbage after the offset.

CVE-2015-1789

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

Fix loop in do_free_upto if cmsbio is NULL: this will happen when attempting
to verify and a digest is not recognised. Reported by Johannes Bauer.

CVE-2015-1792

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

$(PROGS) was mistakenly removed, adding it back.

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 5ef5b9ff)

Fix error handling in ssl_session_dup, as well as incorrect setting up of
the session ticket. Follow on from CVE-2015-1791.

Thanks to LibreSSL project for reporting these issues.

Conflicts:
	ssl/ssl_sess.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Reviewed-by: Rich Salz <rsalz@openssl.org>
MR #838

(cherry picked from commit 57e477b9)

Reviewed-by: Rich Salz <rsalz@openssl.org>
MR #838

(cherry picked from commit 39a298a1)

It should not be possible for DTLS message fragments to span multiple
packets. However previously if the message header fitted exactly into one
packet, and the fragment body was in the next packet then this would work.
Obviously this would fail if packets get re-ordered mid-flight.

Reviewed-by: Tim Hudson <tjh@openssl.org>

In the event of an error in the HMAC function, leaks can occur because the
HMAC_CTX does not get cleaned up.

Thanks to the BoringSSL project for reporting this issue.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit e43a13c8)

The function EC_POINT_is_on_curve does not return a boolean value.
It returns 1 if the point is on the curve, 0 if it is not, and -1
on error. Many usages within OpenSSL were incorrectly using this
function and therefore not correctly handling error conditions.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
(cherry picked from commit 68886be7)

This adds additional checks to the processing of extensions in a ClientHello
to ensure that either no extensions are present, or if they are then they
take up the exact amount of space expected.

With thanks to the Open Crypto Audit Project for reporting this issue.

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

Conflicts:
	ssl/t1_lib.c

This fixes a memory leak that can occur whilst duplicating a BIO chain if
the call to CRYPTO_dup_ex_data() fails. It also fixes a second memory leak
where if a failure occurs after successfully creating the first BIO in the
chain, then the beginning of the new chain was not freed.

With thanks to the Open Crypto Audit Project for reporting this issue.

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

Conflicts:
	crypto/bio/bio_lib.c

BUF_MEM_free() attempts to cleanse memory using memset immediately prior
to a free. This is at risk of being optimised away by the compiler, so
replace with a call to OPENSSL_cleanse() instead.

With thanks to the Open Crypto Audit Project for reporting this issue.

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

The fix for CVE-2015-1791 introduced an error in ssl_session_dup for
Kerberos.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit dcad51bc)

For librypto to be complete, the stuff in both crypto/ and engines/
have to be built.  Doing 'make test' or 'make apps' from a clean
source tree failed to do so.
Corrected by using the new 'build_libcrypto' in the top Makefile.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit acaff3b7)

There's a need for a target that will build all of libcrypto, so let's
add 'build_libcrypto' that does this.  For ortogonality, let's also
add 'build_libssl'.  Have both also depend on 'libcrypto.pc' and
'libssl.pc' so those get built together with the libraries.
This makes 'all' depend on fewer things directly.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 177b5f9c)

Conflicts:
	Makefile.org

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 0fb99904)

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 05627d57)

Pointed out by Victor Vasiliev (vasilvv@mit.edu) via Adam Langley
(Google).

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 1e4a355d)
(cherry picked from commit ac32a77c)

Remove a comment that suggested further clean up was required.
DH_free() performs the necessary cleanup.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit f3d88952)

Ensure OPENSSL_cleanse() is called on the premaster secret value calculated for GOST.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit b7ee4815)

Conflicts:
	ssl/s3_srvr.c

Ensure the Kerberos pre-master secret has OPENSSL_cleanse called on it.

With thanks to the Open Crypto Audit Project for reporting this issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 4e3dbe37)

A BIGNUM can have the value of -0. The function BN_bn2hex fails to account
for this and can allocate a buffer one byte too short in the event of -0
being used, leading to a one byte buffer overrun. All usage within the
OpenSSL library is considered safe. Any security risk is considered
negligible.

With thanks to Mateusz Kocielski (LogicalTrust), Marek Kroemeke and
Filip Palian for discovering and reporting this issue.

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit c5635307)

Conflicts:
	crypto/bn/bn_print.c

objects.pl only looked for a space to see if the name could be
used as a C identifier.  Improve the test to match the real C
rules.

Signed-off-by: Rich Salz <rsalz@akamai.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 591b7aef)

This is for consistency.
Additionally, have its presence define OPENSSL_SYS_WINDOWS as well.

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 3f131556)

Conflicts:
	e_os2.h

If a NewSessionTicket is received by a multi-threaded client when
attempting to reuse a previous ticket then a race condition can occur
potentially leading to a double free of the ticket data.

CVE-2015-1791

This also fixes RT#3808 where a session ID is changed for a session already
in the client session cache. Since the session ID is the key to the cache
this breaks the cache access.

Parts of this patch were inspired by this Akamai change:
https://github.com/akamai/openssl/commit/c0bf69a791239ceec64509f9f19fcafb2461b0d3



Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit 27c76b9b)

Conflicts:
	ssl/ssl.h
	ssl/ssl_err.c

This is a backport of commit e83ee04b

 from
the master branch (and this has also been applied to 1.0.2). In 1.0.2 this
was CVE-2015-0207. For other branches there is no known security issue, but
this is being backported as a precautionary measure.

The DTLSv1_listen function is intended to be stateless and processes
the initial ClientHello from many peers. It is common for user code to
loop over the call to DTLSv1_listen until a valid ClientHello is received
with an associated cookie. A defect in the implementation of DTLSv1_listen
means that state is preserved in the SSL object from one invokation to the
next.

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

dtls1_get_message has an |mt| variable which is the type of the message that
is being requested. If it is negative then any message type is allowed.
However the value of |mt| is not checked in one of the main code paths, so a
peer can send a message of a completely different type and it will be
processed as if it was the message type that we were expecting. This has
very little practical consequences because the current behaviour will still
fail when the format of the message isn't as expected.

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 8c2b1d87)