[#MDC2_Update]
= MDC2_Update
:mrdocs:

Absorb more message bytes into an MDC‐2 digest context (deprecated).

== Synopsis

Declared in `<openssl/mdc2.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
MDC2_Update(
    xref:MDC2_CTX.adoc[MDC2_CTX]* c,
    unsigned char const* data,
    size_t len);
----

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

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *c*
| MDC‐2 context initialized with MDC2_Init().
| *data*
| Message bytes to hash.
| *len*
| Number of bytes at `data.`
|===


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