Add X9.62 KDF to EC EVP_PKEY_METHOD.

Add OIDs for KDF schemes from RFC5753 and add cross references for
each type and the appropriate digest to use.

Add hooks to support key agreement recipient info type (KARI) using
algorithm specific code in the relevant public key ASN1 method.

Add support for key wrap algorithms via EVP interface.

Generalise AES wrap algorithm and add to modes, making existing
AES wrap algorithm a special case.

Move test code to evptests.txt

Keep original function names for nonce versions so we don't have to change
error function codes.

This change updates 8a99cb29 to make the generation of (EC)DSA nonces
using the message digest the default. It also reverts the changes to
(EC)DSA_METHOD structure.

In addition to making it the default, removing the flag from EC_KEY
means that FIPS modules will no longer have an ABI mismatch.

PR #3090
Reported by: Franck Youssef <fry@open.ch>

If no new reason codes are obtained after checking a CRL exit with an
error to avoid repeatedly checking the same CRL.

This will only happen if verify errors such as invalid CRL scope are
overridden in a callback.

Submitted by: Gisle Vanem

RT: 2582, 2850

RT: 2582, 2850

Submitted by: Bryan Drewery
PR: 3075

Document use of -keyopt to use RSA-PSS and RSA-OAEP modes.

Add new tests to cms-test.pl covering PSS and OAEP.

Add support for custom public key parameters in the cms utility using
the -keyopt switch. Works for -sign and also -encrypt if -recip is used.

Extend RSA ASN1 method to support CMS PSS signatures for both sign
and verify.

For signing the EVP_PKEY_CTX parameters are read and the appropriate
CMS structures set up.

For verification the CMS structures are analysed and the corresponding
parameters in the EVP_PKEY_CTX set.

Also add RSA-OAEP support.

For encrypt the EVP_PKEY_CTX parameters are used.

For decrypt the CMS structure is uses to set the appropriate EVP_PKEY_CTX
parameters.

Add support for customisation of CMS handling of signed and enveloped
data from custom public key parameters.

This will provide support for RSA-PSS and RSA-OAEP but could also be
applied to other algorithms.

Add OAEP ctrls to retrieve MD and label. Return errors if
an attempt is made to set or retrieve OAEP parameters when
padding mode is not OAEP.

serverinfo rejects non-empty extensions.

Omit extension if no relevant serverinfo data.

Improve error-handling in serverinfo callback.

Cosmetic cleanups.

s_client documentation.

s_server documentation.

SSL_CTX_serverinfo documentation.

Cleaup -1 and NULL callback handling for custom extensions, add tests.

Cleanup ssl_rsa.c serverinfo code.

Whitespace cleanup.

Improve comments in ssl.h for serverinfo.

Whitespace.

Cosmetic cleanup.

Reject non-zero-len serverinfo extensions.

Whitespace.

Make it build.

Improve RSA sing performance by 20-30% by:
- switching from floating-point to integer conditional moves;
- daisy-chaining sqr-sqr-sqr-sqr-sqr-mul sequences;
- using MONTMUL even during powers table setup;