* Perform ALPN after the SNI callback; the SSL_CTX may change due to
  that processing
* Add flags to indicate that we actually sent ALPN, to properly error
  out if unexpectedly received.
* clean up ssl3_free() no need to explicitly clear when doing memset
* document ALPN functions

Signed-off-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>

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

For config targets such as 'dist', which doesn't have a BASE template,
we still need to have a default build scheme.

Additionally, the unified Makefile template's target 'tar' wasn't
quite as flexible as the unixmake one.

Finally, .travis-create-release.sh can be somewhat simplified now that
it builds with the unified build scheme.

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

We want to preserve a couple of classic builds still, the quickest is
to change all --unified to --classic

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

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

Because of the unified scheme, building on different platforms is very
similar.  We currently have Unix and OpenVMS on the unified scheme,
which means that a separate INSTALL.VMS is no longer needed.

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

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

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

This reverts commit 242ffb05

.

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

Not all platforms support multiblock. Building without it fails prior to
this fix.

RT#4396

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

Bug reported by Michel Sales.

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

The kinv/r fields in the DSA structure are not used by OpenSSL internally
and should not be used in general.

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

Add UI to known algorithms in mkdef.pl

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

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

GH: #811

The numpipes argument to ssl3_enc/tls1_enc is actually the number of
records passed in the array. To make this clearer rename the argument to
|n_recs|.

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

Rename the have_whole_app_data_record_waiting() function to include the
ssl3_record prefix...and make it a bit shorter.

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

Move out most of the boiler plate code that is common between aes128-cbc
and aes128-cbc-hmac-sha1 into helper functions to improve code reuse.

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

The _hidden_* variables were being created on-the-fly. It is better to
create them once up front during bind to avoid any potential race
conditions.

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

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

We had the function EVP_CIPHER_CTX_cipher_data which is newly added for
1.1.0. As we now also need an EVP_CIPHER_CTX_set_cipher_data it makes
more sense for the former to be called EVP_CIPHER_CTX_get_cipher_data.

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

Ensure that a value of 0 is correctly handled for the split_send_frag
argument.

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

The new pipeline code added a new function
EVP_CIPHER_CTX_set_cipher_data(). Add documentation for this and the
existing EVP_CIPHER_CTX_cipher_data() function.

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

We used to use the wrec field in the record layer for keeping track of the
current record that we are writing out. As part of the pipelining changes
this has been moved to stack allocated variables to do the same thing,
therefore the field is no longer needed.

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

Update a comment that was out of date due to the pipelining changes

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

Document the new split_send_frag, max_pipelines and read_buf options.

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

A previous commit added the SSL_has_pending() function which provides a
method for knowing whether OpenSSL has buffered, but as yet unprocessed
record data.

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

Add some documentation for all of the SSL/SSL_CTX functions/ctrls for
conrolling read and write pipelining.

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

Fix an erroenous fall through when setting the max_pipelines value.

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

Previously s_client and s_server relied on using SSL_pending() which does
not take into account read_ahead. For read pipelining to work, read_ahead
gets set automatically. Therefore s_client and s_server have been
converted to use SSL_has_pending() instead.

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

This is similar to SSL_pending() but just returns a 1 if there is data
pending in the internal OpenSSL buffers or 0 otherwise (as opposed to
SSL_pending() which returns the number of bytes available). Unlike
SSL_pending() this will work even if "read_ahead" is set (which is the
case if you are using read pipelining, or if you are doing DTLS). A 1
return value means that we have unprocessed data. It does *not* necessarily
indicate that there will be application data returned from a call to
SSL_read(). The unprocessed data may not be application data or there
could be errors when we attempt to parse the records.

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

This capability is required for read pipelining. We will only read in as
many records as will fit in the read buffer (and the network can provide
in one go). The bigger the buffer the more records we can process in
parallel.

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

With read pipelining we use multiple SSL3_RECORD structures for reading.
There are SSL_MAX_PIPELINES (32) of them defined (typically not all of these
would be used). Each one has a 16k compression buffer allocated! This
results in a significant amount of memory being consumed which, most of the
time, is not needed.  This change swaps the allocation of the compression
buffer to be lazy so that it is only done immediately before it is actually
used.

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

Read pipelining is controlled in a slightly different way than with write
pipelining. While reading we are constrained by the number of records that
the peer (and the network) can provide to us in one go. The more records
we can get in one go the more opportunity we have to parallelise the
processing.

There are two parameters that affect this:
* The number of pipelines that we are willing to process in one go. This is
controlled by max_pipelines (as for write pipelining)
* The size of our read buffer. A subsequent commit will provide an API for
adjusting the size of the buffer.

Another requirement for this to work is that "read_ahead" must be set. The
read_ahead parameter will attempt to read as much data into our read buffer
as the network can provide. Without this set, data is read into the read
buffer on demand. Setting the max_pipelines parameter to a value greater
than 1 will automatically also turn read_ahead on.

Finally, the read pipelining as currently implemented will only parallelise
the processing of application data records. This would only make a
difference for renegotiation so is unlikely to have a significant impact.

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

Add dummy pipline support to dasync for the aes128_cbc_hmac_sha1 cipher.
This is treated as an AEAD cipher.

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

Add the options min_send_frag and max_pipelines to s_server and s_client
in order to control pipelining capabilities. This will only have an effect
if a pipeline capable cipher is used (such as the one provided by the
dasync engine).

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

Use the new pipeline cipher capability to encrypt multiple records being
written out all in one go. Two new SSL/SSL_CTX parameters can be used to
control how this works: max_pipelines and split_send_fragment.

max_pipelines defines the maximum number of pipelines that can ever be used
in one go for a single connection. It must always be less than or equal to
SSL_MAX_PIPELINES (currently defined to be 32). By default only one
pipeline will be used (i.e. normal non-parallel operation).

split_send_fragment defines how data is split up into pipelines. The number
of pipelines used will be determined by the amount of data provided to the
SSL_write call divided by split_send_fragment. For example if
split_send_fragment is set to 2000 and max_pipelines is 4 then:
SSL_write called with 0-2000 bytes == 1 pipeline used
SSL_write called with 2001-4000 bytes == 2 pipelines used
SSL_write called with 4001-6000 bytes == 3 pipelines used
SSL_write_called with 6001+ bytes == 4 pipelines used

split_send_fragment must always be less than or equal to max_send_fragment.
By default it is set to be equal to max_send_fragment. This will mean that
the same number of records will always be created as would have been
created in the non-parallel case, although the data will be apportioned
differently. In the parallel case data will be spread equally between the
pipelines.

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

Implement aes128-cbc as a pipeline capable cipher in the dasync engine.
As dasync is just a dummy engine, it actually just performs the parallel
encrypts/decrypts in serial.

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

Add a flag to indicate that a cipher is capable of performing
"pipelining", i.e. multiple encrypts/decrypts in parallel. Also add some
new ctrls that ciphers will need to implement if they are pipeline capable.

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

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

- Only build & test two configurations. Make all the
  other build variants buildonly on gcc (clang on osx).
- Don't build with default clang at all on linux.
- Only use gcc-5 and clang-3.6 for the sanitizer builds. Re-running
  e.g. CONFIG_OPTS="shared" with them seems redundant.

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