[#EVP_MD_get_block_size]
= EVP_MD_get_block_size
:mrdocs:

Return the internal block size of a message digest in bytes.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_MD_get_block_size(xref:EVP_MD.adoc[EVP_MD] const* md);
----

== Return Value

Block size in bytes used by the compression function.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *md*
| Digest method to query.
|===


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