handle unsupported key types.

ctrl.

of bits; thanks to Michael McDougall <mmcdouga@saul.cis.upenn.edu>

PR: 1318

Use cross reference table in ASN1_item_sign(), ASN1_item_verify() to eliminate
the need for algorithm specific code.

value of the passed output buffer is NULL.

The old method of using EVP_PKEY_size(pkey) isn't flexible enough to cover all
cases where the output length may depend on the operation or the parameters
associated with it.

Fix rsa_pkey_method.

Add digest size sanity checks.

Update dependencies.

need for a separate EVP_PKEY parameter in the other operation
initialization routines.

No method implementations yet.

of the EVP routines to public key algorithms.

line option to print out info.

defering freeing in OBJ_cleanup().