=head1 NAME
EVP_SIGNATURE_fetch, EVP_SIGNATURE_free, EVP_SIGNATURE_up_ref,
-EVP_SIGNATURE_provider
+EVP_SIGNATURE_is_a, EVP_SIGNATURE_provider, EVP_SIGNATURE_do_all_provided
- Functions to manage EVP_SIGNATURE algorithm objects
=head1 SYNOPSIS
const char *properties);
void EVP_SIGNATURE_free(EVP_SIGNATURE *signature);
int EVP_SIGNATURE_up_ref(EVP_SIGNATURE *signature);
+ int EVP_SIGNATURE_is_a(const EVP_SIGNATURE *signature, const char *name);
OSSL_PROVIDER *EVP_SIGNATURE_provider(const EVP_SIGNATURE *signature);
+ void EVP_SIGNATURE_do_all_provided(OPENSSL_CTX *libctx,
+ void (*fn)(EVP_SIGNATURE *signature,
+ void *arg),
+ void *arg);
=head1 DESCRIPTION
EVP_SIGNATURE_up_ref() increments the reference count for an B<EVP_SIGNATURE>
structure.
+EVP_SIGNATURE_is_a() returns 1 if I<signature> is an implementation of an
+algorithm that's identifiable with I<name>, otherwise 0.
+
EVP_SIGNATURE_provider() returns the provider that I<signature> was fetched from.
+EVP_SIGNATURE_do_all_provided() traverses all SIGNATURE implemented by all
+activated roviders in the given library context I<libctx>, and for each of the
+implementations, calls the given function I<fn> with the implementation method
+and the given I<arg> as argument.
+
=head1 RETURN VALUES
EVP_SIGNATURE_fetch() returns a pointer to an B<EVP_SIGNATURE> for success