[#HMAC_CTX_copy]
= HMAC_CTX_copy
:mrdocs:

Copy the HMAC state from `sctx` into `dctx` (deprecated).

== Synopsis

Declared in `<openssl/hmac.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
HMAC_CTX_copy(
    xref:HMAC_CTX.adoc[HMAC_CTX]* dctx,
    xref:HMAC_CTX.adoc[HMAC_CTX]* sctx);
----

[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
| *dctx*
| Destination context; must already be allocated with HMAC_CTX_new().
| *sctx*
| Source context whose digest, key, and intermediate state are copied.
|===


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