Fix warnings.

Send ctrls to EVP_PKEY_METHOD during signing of PKCS7 structure so
customisation is possible.

Submitted by: Masashi Fujita
Reviewed by: Bodo Moeller

implementations and functional reference counting when a context
is allocated, free or copied.

for enhanced sign/verify operations.

More error checking for RSA pmeth.

ctrl.

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.

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