Also reorder preferences to prefer prime curves to binary curves, and P-256 to everything else.

The result:

$ openssl s_server -named_curves "auto"

This command will negotiate an ECDHE ciphersuite with P-256:

$ openssl s_client

This command will negotiate P-384:

$ openssl s_client -curves "P-384"

This command will not negotiate ECDHE because P-224 is disabled with "auto":

$ openssl s_client -curves "P-224"

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

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

- Do not advise generation of DH parameters with dsaparam to save
computation time.
- Promote use of custom parameters more, and explicitly forbid use of
built-in parameters weaker than 2048 bits.
- Advise the callback to ignore <keylength> - it is currently called
with 1024 bits, but this value can and should be safely ignored by
servers.

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

The default bitlength is now 2048. Also clarify that either the number
of bits or the generator must be present:

$ openssl dhparam -2
and
$ openssl dhparam 2048
generate parameters but
$ openssl dhparam
does not.

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

Reviewed-by: Emilia Käsper <emilia@openssl.org>

Add scrypt test support to evp_test and add test values from
from draft-josefsson-scrypt-kdf-03.

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

Add scrypt algorithm as described in draft-josefsson-scrypt-kdf-03

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

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

BLKINIT optimization worked on T4, but for some reason appears "too
aggressive" for T3 triggering intermiitent EC failures. It's not clear
why only EC is affected...

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

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

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

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

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

Move per-connection state out of the CERT structure: which should just be
for shared configuration data (e.g. certificates to use).

In particular move temporary premaster secret, raw ciphers, peer signature
algorithms and shared signature algorithms.

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

Rewrite and tidy ASN1_INTEGER and ASN1_ENUMERATED handling.

Remove code duplication.

New functions to convert between int64_t and ASN.1 types without the
quirks of the old long conversion functions.

Add documentation.

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

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

More miscellaneous updates to version negotiation following feedback.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

Move these functions into t1_clnt.c, t1_srvr.c and t1_meth.c and take
advantage of the existing tls1_get*_method() functions that all the other
methods are using. Since these now have to support SSLv3 anyway we might
as well use the same set of get functions for both TLS and SSLv3.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

Miscellaneous updates following review comments on the version negotiation
rewrite patches.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

Update various documentation references to the new TLS_*_method names. Also
add a CHANGES entry.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

Following the version negotiation rewrite all of the previous code that was
dedicated to version negotiation can now be deleted - all six source files
of it!!

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

Continuing from the previous commit this changes the way we do client side
version negotiation. Similarly all of the s23* "up front" state machine code
has been avoided and again things now work much the same way as they already
did for DTLS, i.e. we just do most of the work in the
ssl3_get_server_hello() function.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

This commit changes the way that we do server side protocol version
negotiation. Previously we had a whole set of code that had an "up front"
state machine dedicated to the negotiating the protocol version. This adds
significant complexity to the state machine. Historically the justification
for doing this was the support of SSLv2 which works quite differently to
SSLv3+. However, we have now removed support for SSLv2 so there is little
reason to maintain this complexity.

The one slight difficulty is that, although we no longer support SSLv2, we
do still support an SSLv3+ ClientHello in an SSLv2 backward compatible
ClientHello format. This is generally only used by legacy clients. This
commit adds support within the SSLv3 code for these legacy format
ClientHellos.

Server side version negotiation now works in much the same was as DTLS,
i.e. we introduce the concept of TLS_ANY_VERSION. If s->version is set to
that then when a ClientHello is received it will work out the most
appropriate version to respond with. Also, SSLv23_method and
SSLv23_server_method have been replaced with TLS_method and
TLS_server_method respectively. The old SSLv23* names still exist as
macros pointing at the new name, although they are deprecated.

Subsequent commits will look at client side version negotiation, as well of
removal of the old s23* code.

Reviewed-by: Kurt Roeckx <kurt@openssl.org>

And remove a duplicate comment, probably from a merge hiccup.

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

Follow the same convention the other OPENSSL_NO_xxx header files
do, and use #error instead of making the header file be a no-op.

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

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

crypto/cryptlib.h moved to crypto/include/internal; update
the script.

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

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

The move of headers from crypto/ to crypto/include/internal/ needs
this extra inclusion directory or the build fails.

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

There are header files in crypto/ that are used by a number of crypto/
submodules.  Move those to crypto/include/internal and adapt the
affected source code and Makefiles.

The header files that got moved are:

crypto/cryptolib.h
crypto/md32_common.h

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

Added depencies on the public variants of some keys in test to Makefile.
Added the newly introduced key files from test/ in the list of files
to copy in util/pl/unix.pl.

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

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

There are header files in crypto/ that are used by the rest of
OpenSSL.  Move those to include/internal and adapt the affected source
code, Makefiles and scripts.

The header files that got moved are:

crypto/constant_time_locl.h
crypto/o_dir.h
crypto/o_str.h

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

Having the INTxx_MIN et al macros defined in a public header is
unnecessary and risky.  Also, it wasn't done for all platforms that
might need it.

So we move those numbers to an internal header file, do the math
ourselves and make sure to account for the integer representations we
know of.

This introduces include/internal, which is unproblematic since we
already use -I$(TOP)/include everywhere.  This directory is different
from crypto/include/internal, as the former is more general internal
headers for all of OpenSSL, while the latter is for libcrypto only.

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

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

Include appropriate headers for standard integer types in e_os2.h

This should use stdint.h, inttypes.h or a workaround for systems which
have neither.

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

Had old patch, forgot to push/patch this to master

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

Various bugs found by Viktor, Emilia, Matt, etc.

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

If an EVP implementation (such as an engine) fails out early, it's
possible to call EVP_CIPHER_CTX_cleanup() which will call
ctx->cipher->cleanup() before the cipher_data has been initialized
via ctx->cipher->init().  Guarantee it's all-bytes-zero as soon as
it is allocated.

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

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