[#CRYPTO_ocb128_copy_ctx]
= CRYPTO_ocb128_copy_ctx
:mrdocs:

Copy an OCB context, optionally replacing the encrypt/decrypt key pointers.

== Synopsis

Declared in `<openssl/modes.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CRYPTO_ocb128_copy_ctx(
    xref:OCB128_CONTEXT-0a.adoc[OCB128_CONTEXT]* dest,
    xref:OCB128_CONTEXT-0a.adoc[OCB128_CONTEXT]* src,
    void* keyenc,
    void* keydec);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dest*
| Destination context to initialise as a copy of `src.`
| *src*
| Source OCB context to copy.
| *keyenc*
| Replacement encrypt‐direction key, or NULL to keep `src's.`
| *keydec*
| Replacement decrypt‐direction key, or NULL to keep `src's.`
|===


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