Add support for separate verify and chain stores in s_client.

to the SSL_CONF APIs.

This is complicated a little because the SSL_CTX structure is not available
when the command line is processed: so just check syntax of commands initially
and store them, ready to apply later.

certificate. Add options to s_client, s_server and x509 utilities
to print results of checks.

New option -verify_quiet to shut up the verify callback unless there is
an error.

new ctrl to retrive value of received temporary key in server key exchange message, print out details in s_client

by a certificate chain. Add additional tests to handle client
certificates: checks for matching certificate type and issuer name
comparison.

Print out results of checks for each candidate chain tested in
s_server/s_client.

possible to have different stores per SSL structure or one store in
the parent SSL_CTX. Include distint stores for certificate chain
verification and chain building. New ctrl SSL_CTRL_BUILD_CERT_CHAIN
to build and store a certificate chain in CERT structure: returing
an error if the chain cannot be built: this will allow applications
to test if a chain is correctly configured.

Note: if the CERT based stores are not set then the parent SSL_CTX
store is used to retain compatibility with existing behaviour.

details in s_client.

Also add ctrl to set client certificate types. If not used sensible values
will be included based on supported signature algorithms: for example if
we don't include any DSA signing algorithms the DSA certificate type is
omitted.

Fix restriction in old code where certificate types would be truncated
if it exceeded TLS_CT_NUMBER.

is required by client or server. An application can decide which
certificate chain to present based on arbitrary criteria: for example
supported signature algorithms. Add very simple example to s_server.
This fixes many of the problems and restrictions of the existing client
certificate callback: for example you can now clear existing certificates
and specify the whole chain.

Only store encoded versions of peer and configured signature algorithms.
Determine shared signature algorithms and cache the result along with NID
equivalents of each algorithm.

s_server.

enabled instead of requiring an application to hard code a (possibly
inappropriate) parameter set and delve into EC internals we just
automatically use the preferred curve.

Tidy some code up.

Don't allocate a structure to handle ECC extensions when it is used for
default values.

Make supported curves configurable.

Add ctrls to retrieve shared curves: not fully integrated with rest of
ECC code yet.

Add more extension names in s_cb.c extension printing code.

extensions to s_client and s_server to print out retrieved valued.

Extend CERT structure to cache supported signature algorithm data.

Submitted by: Robin Seggelmann <seggelmann@fh-muenster.de>
Reviewed by: steve

Support for TLS/DTLS heartbeats.

Submitted by: Peter Sylvester <peter.sylvester@edelweb.fr>
Reviewed by: steve

Document unknown_psk_identify alert, remove pre-RFC 5054 string from
ssl_stat.c

checking added, SHA256 PRF support added.

At present only RSA key exchange ciphersuites work with TLS v1.2 as the
new signature format is not yet implemented.

not to mention that first sockaddr_storage had __ss_family, not ss_family.
In other words it makes more sense to avoid sockaddr_storage...

Submitted by: Michael Tuexen <tuexen@fh-muenster.de>
Approved by: steve@openssl.org

IPv6 support for DTLS.

Submitted by: Robin Seggelmann <seggelmann@fh-muenster.de>
Approved by: steve@openssl.org

Fix DTLS cookie management bugs.