[#EVP_MD_CTX_set_update_fn]
= EVP_MD_CTX_set_update_fn
:mrdocs:

Override the update function used by a digest context (deprecated).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
void
EVP_MD_CTX_set_update_fn(
    xref:EVP_MD_CTX.adoc[EVP_MD_CTX]* ctx,
    int(* update)(xref:EVP_MD_CTX.adoc[EVP_MD_CTX]*, void const*, size_t));
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Digest context whose update implementation is replaced.
| *update*
| Replacement update callback, or NULL to restore the method default.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#