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

PR#3403

Add functions to return the "bits of security" for various public key
algorithms. Based on SP800-57.

RFC5114 parameters and X9.42 DH public and private keys.

Submitted by: steve@openssl.org

Initialize fields correctly if pem_str or info are NULL in  EVP_PKEY_asn1_new().

knock-on work than expected - they've been extracted into a patch
series that can be completed elsewhere, or in a different branch,
before merging back to HEAD.

with the appropriate parameters which calls OBJ_bsearch(). A compiler will
typically inline this.

This avoids the need for cmp_xxx variables and fixes unchecked const issues
with CHECKED_PTR_OF()

Duplicate const.
Use of ; outside function.

Conversion between void * and function pointer.
Value computed not used.
Signed/unsigned argument.

implementations instead of all added ENGINEs to cover case where an
ENGINE is not added.

line option to print out info.

initialize it. Initial support for application added public key ASN1.

key ASN1 handling through a single EVP_PKEY_ASN1_METHOD structure and move
the spaghetti algorithm specific code to a single ASN1 module for each
algorithm.

I've covered all the memset()s I felt safe modifying, but may have missed some.

prototype hack. This unfortunately means that
every ASN1_*_END construct cannot have a
trailing ;