[#EVP_PKEY_CTX_dup]
= EVP_PKEY_CTX_dup
:mrdocs:

Duplicate a public‐key algorithm context (not supported during keygen).

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]*
EVP_PKEY_CTX_dup(xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX] const* ctx);
----

== Return Value

Newly allocated copy, or NULL on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Source context to copy.
|===


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