[#EVP_CIPHER_CTX_dup]
= EVP_CIPHER_CTX_dup
:mrdocs:

Duplicate a cipher context, including its algorithm state.

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX]*
EVP_CIPHER_CTX_dup(xref:EVP_CIPHER_CTX.adoc[EVP_CIPHER_CTX] const* in);
----

== Return Value

Newly allocated copy, or NULL on error; free with EVP_CIPHER_CTX_free.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *in*
| Context to copy.
|===


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