Fix the build warning under OPENSSL_NO_GOST

Variable 'pktype' was set but not used under OPENSSL_NO_GOST. This change
will fix the build warning under [-Werror=unused-but-set-variable].

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2961)

Cleaning UEFI Build with additional OPENSSL_SYS_UEFI flags

Add OPENSSL_SYS_UEFI to remove unused syslog and uid stuffs for
more clean UEFI build.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2961)

Further de-obfuscation

A similar change that probably should have been wrapped into
commit e0926ef49df09a85117d7442db83f321aeb5b982.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3010)

Add documentation for SNI APIs

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3071)

Remove duplicate doc

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3068)

More typo fixes

Fix some comments too
[skip ci]

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3069)

Typo in SSL_CTX_sess_number.pod - started

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

Tidy up the SSL options in SSL_CTX_set_options.pod

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

SSL_CTX_use_PrivateKey_file uses private key, not certificate

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

Typo in SSL_CONF_cmd_argv.pod

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

Typo in SSL_CONF_CTX_set1_prefix.pod - change SSL_CTX_cmd to SSL_CONF_cmd

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

Typo in SSL_CONF_CTX_set_flags.pod

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3070)

Test infrastructure additions.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3011)

Fix 0 -> NULL, indentation

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3066)

Refomat a few comments on 80 cols

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3066)

Spelling fixes

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3066)

Fix a few more typos

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3066)

Add documentation for SSL_*_ex_data() functions

[skip ci]

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3050)

Add documentation for SSL version methods

[skip ci]

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3049)

Provide documentation for some state machine related functions

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3051)

update README

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3059)

Add X25519 doc

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3059)

fix typo

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3059)

Provide documentation for missing SSL_SESSION_* functions

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3052)

Move PRIu64, OSSLzu to e_os.h

Those macros are private, not public.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3044)

Add enable-aria where rc5 and md2 are built.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3046)

asynctest: don't depend on apps

Remove unnecessary include of apps.h. Tests shouldn't take a
dependency on apps. In this case, there is no dependency, the include
is unnecessary.

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

X509_cmp_time.pod: fix doc nits

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

Remove redundant decl of 509_STORE_set_flags

a47bc283 accidentally adds another define for X509_STORE_set_flags
It is already defined 5lines prior

CLA: trivial

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3047)

Add documentation for X509 time functions

[ci skip]

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

apps/passwd.c: 32 bits are sufficient to hold ROUNDS_MAX.

Even though C standard defines 'z' modifier, recent mingw compilers break
the contract by defining __STDC_VERSION__ with non-compliant MSVCRT.DLL.
In other words we can't use %zu with mingw, but insteadl of cooking

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

In err_cleanup(), cleanup the thread local storage too

Fixes #3033

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3035)

aes/asm/bsaes-armv7.pl: relax stack alignment requirement.

Even though Apple refers to Procedure Call Standard for ARM Architecture
(AAPCS), they apparently adhere to custom version that doesn't follow
stack alignment constraints in the said standard. [Why or why? If it's
vendor lock-in thing, then it would be like worst spot ever.] And since
bsaes-armv7 relied on standard alignment, it became problematic to
execute the code on iOS.

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

engines/e_capi.c: formatting and styling fixes.

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

Don't access memory before checking the correct length in aesni_cbc_hmac_sha256_ctrl in case EVP_CTRL_AEAD_TLS1_AAD.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3023)

Move the downgrade sentinel declarations to a header file

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3022)

Add a test for the TLSv1.3 downgrade mechanism

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3022)

Make the TLSv1.3 downgrade mechanism a configurable option

Make it disabled by default. When TLSv1.3 is out of draft we can remove
this option and have it enabled all the time.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3022)

Add client side support for TLSv1.3 downgrade mechanism

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3022)

Add server side support for TLSv1.3 downgrade mechanism

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3022)

"any" instead of "and"

The "and" should be an "any"

Fixed in LibreSSL's docs: http://man.openbsd.org/man5/x509v3.cnf.5#Subject_alternative_name

CLA: trivial

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2980)

Fix function documentation

CLA: trivial

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2972)

bn/asm/sparcv9-mont.pl: fix squaring code path.

This module is used only with odd input lengths, i.e. not used in normal
PKI cases, on contemporary processors. The problem was "illuminated" by
fuzzing tests.

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

Look for comma before - in POD pages

[skip ci]

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3021)

Fix find-doc-nits: { is significant in regexps

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3019)

Fix 80-test_ssl_old.t: only count the ciphers if there are any.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3014)

modes/ocb128.c: fix misaligned access in ILP32 builds on 64-bit processors.

One could have fixed the problem by arranging 64-bit alignment of
EVP_AES_OCB_CTX.aad_buf in evp/e_aes.c, but CRYPTO_ocb128_aad
prototype doesn't imply alignment and we have to honour it.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2994)

aes/asm/aesni-sha*-x86_64.pl: fix IV handling in SHAEXT paths.

Initial IV was disregarded on SHAEXT-capable processors. Amazingly
enough bulk AES128-SHA* talk-to-yourself tests were passing.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2992)

poly1305/asm/poly1305-x86_64.pl: add poly1305_blocks_vpmadd52_8x.

As hinted by its name new subroutine processes 8 input blocks in
parallel by loading data to 512-bit registers. It still needs more
work, as it needs to handle some specific input lengths better.
In this sense it's yet another intermediate step...

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

x86_64 assembly pack: add some Ryzen performance results.

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

Change exit_checker comment on returned status

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3012)

Refuse to run the PYCA external test if configured 'no-shared'

[extended tests]

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3007)

Travis: make a separate job for external tests

Some of the external tests do not run well with 'no-shared'

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3007)

95-test_external_pyca_data/cryptography.py: only install for testing

Also, be less silent when installing, so possible errors are shown.

[extended tests]

Fixes #3005

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3007)

Adapt 20-test_enc.t and 20-test_enc_more.t to use statusvar

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3004)

Adapt 80-test_ssl_old.t to use statusvar

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3004)

OpenSSL::Test: add a statusvar option for run with capture => 1

When using run() with capture => 1, there was no way to find out if
the command was successful or not.  This change adds a statusvar
option, that must refer to a scalar variable, for example:

    my $status = undef;
    my @line = run(["whatever"], capture => 1, statusvar => \$status);

$status will be 1 if the command "whatever" was successful, 0
otherwise.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3004)

Remove duplicate X509_OBJECT free function.

These two functions do the same thing.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3001)

Add a test for resumption after HRR

Make sure we actually test resumption where an HRR has occurred.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2996)

Fix resumption after HRR

Commit 6b1bb98fa moved the processing of ClientHello extensions into the
state machine post-processing stage. After processing s->init_num is reset
to 0, so by post-processing we cannot rely on its value. Unfortunately we
were using it to handle the PSK extension. This causes the handshake to
fail.

We were using init_num to figure out the length of ClientHello2 so we can
remove it from the handshake_buffer. The handshake_buffer holds the
transcript of all the messages sent so far. For PSK processing though we
only want to add in a partial ClientHello2. This commit changes things so
we just work out where ClientHello2 starts, working forward from the
beginning of handshake_buffer.

Fixes #2983

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2996)

Rework how protocol specific ciphers in 80-test_ssl_old.t are picked out

The code to do this incorrectly assumed that the protocol version
could be used as a valid cipher suite  for the 'openssl cipher'
command.  While this is true in some cases, that isn't something to be
trusted.  Replace that assumption with code that takes the full
'openssl ciphers' command output and parses it to find the ciphers we
look for.

Reviewed-by: Emilia Käsper <emilia@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2956)

Fix decoding of ASN.1 LONG and ZLONG items

LONG and ZLONG items (which are OpenSSL private special cases of
ASN1_INTEGER) are encoded into DER with padding if the leading octet
has the high bit set, where the padding can be 0x00 (for positive
numbers) or 0xff (for negative ones).

When decoding DER to LONG or ZLONG, the padding wasn't taken in
account at all, which means that if the encoded size with padding
is one byte more than the size of long, decoding fails.  This change
fixes that issue.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3000)

Document BIO_printf family

Also fix an error in UI_STRING (typo; wrong case).

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2999)

Fix docs for X509_CRL_get0_by_serial() and X509_CRL_get0_by_cert()

They both return 2 when the revoked entry that's found has the reason
removeFromCRL.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2993)

Fix the error handling in CRYPTO_dup_ex_data.
Fix a strict aliasing issue in ui_dup_method_data.
Add test coverage for CRYPTO_dup_ex_data, use OPENSSL_assert.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2988)

Fix a few internals tests

The internals tests for chacha, poly1305 and siphash were erroneously
made conditional on if mdc2 was enabled.  Corrected to depend on the
correct algorithms being enabled instead.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2991)

Improve testing of elliptic curve validation

Add a test recipe (test/recipes/15-test_ecparams.t) which uses 'openssl
ecparam' to check the test vectors.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2544)

Improve testing of elliptic curve validation

This involves:

- A directory of valid and invalid PEM-encoded curves.
  This is non-exhaustive and can be added to.
- A minor patch to 'openssl ecparam' to make it exit non-zero
  when curve validation fails.

- A test recipe is added in a separate commit.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2544)

Update test vectors in tls13secretstest

These were still generated by openssl, but with
the previous commit are corroborated by rustls.

(cherry picked from commit eae1982619e90c6b79a6ebc89603d81c13c81ce8)

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2989)

TLS1.3: Correct intermediate secret derivation

This label for this derivation was incorrectly "derived" or "der" depending
on the pointer size of the build(!). The correct string is "derived secret".

(cherry picked from commit 936dcf272033c1bf59a5e859ec63e2557194f191)

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2989)

Use memcmp() instead of CRYPTO_memcmp() when fuzzing

Reviewed-by: Andy Polyakov <appro@openssl.org>
GH: #2633

Make the CRYPTO_memcmp() prototype match memcmp()

Reviewed-by: Andy Polyakov <appro@openssl.org>
GH: #2633

doc: fix -keylogfile option

Add it in the options section, not the "Connected commands" section.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2977)

Implement certificate_authorities extension

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2918)

Support draft-19 TLS certificate request format

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2918)

Allow signature algorithms in TLS 1.3 certificate request extensions.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2918)

Move parsing and construction of CA names to separate functions

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2918)

Fixed PKCS5_PBKDF2_HMAC() to adhere to the documentation.

The documentation of this function states that the password parameter
can be NULL. However, the implementation returns an error in this case
due to the inner workings of the HMAC_Init_ex() function.
With this change, NULL password will be treated as an empty string and
PKCS5_PBKDF2_HMAC() no longer fails on this input.

I have also added two new test cases that tests the handling of the
special values NULL and -1 of the password and passlen parameters,
respectively.

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1692)

Fix no-dtls builds

Commits f2ff1432f in master and 14d4d7eda in 1.1.0 broke the no-dtls build
by moving the position of a "#endif" for OPENSSL_NO_DTLS in a change
which is otherwise unrelated to DTLS. This puts it back to where it was.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2974)

Fix some undefined behaviour in stack test

At one point the stack was passing a pointer of the element *before* an
array which is undefined.

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2971)

Add unit tests for the lhash functionality.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2965)

Add Client CA names tests

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2969)

Add ExpectedClientCANames

Add ExpectedClientCANames: for client auth this checks to see if the
list of certificate authorities supplied by the server matches the
expected value.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2969)

Remove obsolete version test when returning CA names.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2969)

Add TLSv1.3 draft-19 messages to trace

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2970)

Handle TLSv1.3 being disabled in clienthello test

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2968)

Add tests for the padding extension

Check that the padding extension pads correctly for various scenarios.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2968)

Fix the Padding extension

In OpenSSL 1.1.0 the padding extension MUST be last because it calculates
the length of everything that has been written into the ClientHello to
determine whether it needs to be padded or not. With TLSv1.3 that isn't
possible because the specification requires that the PSK extension is last.
Therefore we need to fix the padding extension to take account of any PSK
extension that will be later added.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2968)

Updates following review feedback

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Add some HRR tests

Check that we handle changes of ciphersuite between HRR and ServerHello
correctly.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Add some more PSK tests

Test that if the server selects a ciphersuite with a different hash from
the PSK in the original ClientHello, the second ClientHello does not
contain the PSK.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Fix ciphersuite handling during an HRR

Choose a new ciphersuite for the HRR. Don't just use the one from the
session.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Ensure after an HRR any PSKs have the right hash

Don't include a PSK that does not have the right hash for the selected
ciphersuite following an HRR.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

HelloRetryRequest updates for draft-19

Draft-19 changes the HRR transcript hash so that the initial ClientHello
is replaced in the transcript with a special synthetic message_hash message
that just contains a hash of ClientHello1 as its message body.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Check ClientHello boundary as per draft-19

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Merge early_data_info extension into early_data

As per draft-19

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Update end of early data processing for draft-19

The end of early data is now indicated by a new handshake message rather
than an alert.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Update the TLSv1.3 secrets test vectors for draft-19

These are self-generated test vectors which gives us very little
confidence that we've got the implementation right. However until
we can get vectors from somewhere else (or ideally official vectors)
this is all we've got. At least it will tell us if we accidentally
break something at some point in the future.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Update secret generation for draft-19

TLSv1.3 draft 19 introduces a new pre HKDF-extract Derive-Secret stage.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)

Update the TLSv1.3 version indicator for draft-19

This change will mean we will lose interoperability with draft-18
implementations.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2895)