BIO_f_md, BIO_set_md, BIO_get_md, BIO_get_md_ctx - message digest BIO filter
-=for comment multiple includes
-
=head1 SYNOPSIS
+=for comment multiple includes
+
#include <openssl/bio.h>
#include <openssl/evp.h>
for the digest routines EVP_DigestInit(), EVP_DigestUpdate()
and EVP_DigestFinal().
-Any data written or read through a digest BIO using BIO_read() and
-BIO_write() is digested.
+Any data written or read through a digest BIO using BIO_read_ex() and
+BIO_write_ex() is digested.
BIO_gets(), if its B<size> parameter is large enough finishes the
digest calculation and returns the digest value. BIO_puts() is