[#EVP_CIPHER_CTX_set_app_data]
= EVP_CIPHER_CTX_set_app_data
:mrdocs:

Store an application pointer on a cipher context.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
EVP_CIPHER_CTX_set_app_data(
    xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]* ctx,
    void* data);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Cipher context.
| *data*
| Opaque pointer retained until overwritten or the context is freed.
|===


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