Because we use atexit() to cleanup after ourselves, this will cause a
problem if we have been dynamically loaded and then unloaded again: the
atexit() handler may no longer be there.

Most modern atexit() implementations can handle this, however there are
still difficulties if libssl gets unloaded before libcrypto, because of
the atexit() callback that libcrypto makes to libssl.

The most robust solution seems to be to ensure that libcrypto and libssl
never unload. This is done by simply deliberately leaking a dlopen()
reference to them.
Reviewed-by: NTim Hudson <tjh@openssl.org>

This works the same way as DSO_pathbyaddr() but instead returns a ptr to
the DSO that contains the provided symbol.
Reviewed-by: NTim Hudson <tjh@openssl.org>

Commit 3d8b2ec4 removed various unused functions. However now we need to
use one of them! This commit resurrects DSO_pathbyaddr(). We're not going to
resurrect the Windows version though because what we need to achieve can be
done a different way on Windows.
Reviewed-by: NTim Hudson <tjh@openssl.org>

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

We should fail if we receive an unrecognised record type
Reviewed-by: NTim Hudson <tjh@openssl.org>

TLS1.0 and TLS1.1 say you SHOULD ignore unrecognised record types, but
TLS 1.2 says you MUST send an unexpected message alert. We swap to the
TLS 1.2 behaviour for all protocol versions to prevent issues where no
progress is being made and the peer continually sends unrecognised record
types, using up resources processing them.

Issue reported by 郭志攀
Reviewed-by: NTim Hudson <tjh@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1815)

CLA: trivial
Reviewed-by: NKurt Roeckx <kurt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1801)

This test checks that read_ahead works correctly when dealing with large
records.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

The function ssl3_read_n() takes a parameter |clearold| which, if set,
causes any old data in the read buffer to be forgotten, and any unread data
to be moved to the start of the buffer. This is supposed to happen when we
first read the record header.

However, the data move was only taking place if there was not already
sufficient data in the buffer to satisfy the request. If read_ahead is set
then the record header could be in the buffer already from when we read the
preceding record. So with read_ahead we can get into a situation where even
though |clearold| is set, the data does not get moved to the start of the
read buffer when we read the record header. This means there is insufficient
room in the read buffer to consume the rest of the record body, resulting in
an internal error.

This commit moves the |clearold| processing to earlier in ssl3_read_n()
to ensure that it always takes place.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

We add ssl_cipher_get_overhead() as an internal function, to avoid
having too much ciphersuite-specific knowledge in DTLS_get_data_mtu()
itself. It's going to need adjustment for TLSv1.3... but then again, so
is fairly much *all* of the SSL_CIPHER handling. This bit is in the noise.
Reviewed-by: NRich Salz <rsalz@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

Based on feedback received
Reviewed-by: NRich Salz <rsalz@openssl.org>

Now that ossltest knows about a TLS1.3 cipher we can now do TLS1.3 in
TLSProxy
Reviewed-by: NRich Salz <rsalz@openssl.org>

This might need more changes once we do a "real" TLS1.3 ciphersuite. But it
should do for now.
Reviewed-by: NRich Salz <rsalz@openssl.org>

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

Also we disable TLS1.3 by default (use enable-tls1_3 to re-enable). This is
because this is a WIP and will not be interoperable with any other TLS1.3
implementation.

Finally, we fix some tests that started failing when TLS1.3 was disabled by
default.
Reviewed-by: NRich Salz <rsalz@openssl.org>

When matching a ciphersuite if we are given an id, make sure we use it
otherwise we will match another ciphersuite which is identical except for
the TLS version.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Includes addition of the various options to s_server/s_client. Also adds
one of the new TLS1.3 ciphersuites.

This isn't "real" TLS1.3!! It's identical to TLS1.2 apart from the protocol
and the ciphersuite...and the ciphersuite is just a renamed TLS1.2 one (not
a "real" TLS1.3 ciphersuite).
Reviewed-by: NRich Salz <rsalz@openssl.org>

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

Forks will have to define their own
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1821)

For convenience, combine getting a new ref for the new SSL_CTX
with assigning the store and freeing the old one.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1755)

Reviewed-by: NKurt Roeckx <kurt@roeckx.be>
Reviewed-by: NRich Salz <rsalz@openssl.org>

GH: #1788

Reviewed-by: NRichard Levitte <levitte@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1625)

This reverts commit ca1574ce.
Not suitabled for a minor release as it breaks the ABI.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1802)

Fixes #1781
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1813)

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

Reviewed-by: NTim Hudson <tjh@openssl.org>
Reviewed-by: NMatt Caswell <matt@openssl.org>

VC-noCE-common and VC-WIN64-common were missing this line:

        template         => 1,

Fixes GH#1809
Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1811)

After the recent reworking, not everything matched up, and some
comments didn't catch up to the outl-->dlen and inl-->dlen renames
that happened during the development of the recent patches.

Try to make parameter names consistent across header, implementation,
and manual pages.

Also remove some trailing whitespace that was inadvertently introduced.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1798)

Make it clear that the OPENSSL_LOCAL_CONFIG_DIR settings take
precedence over the in-tree configs.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1798)

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

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

Rename some parameters; add some error codes; fix a comment; etc
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Make sure the return value isn't bigger than the buffer len
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Based on feedback received.
Reviewed-by: NRichard Levitte <levitte@openssl.org>

Rename some parameters.
Also change handling of buffer sizes >INT_MAX in length.
Reviewed-by: NRichard Levitte <levitte@openssl.org>