[#EVP_PKEY_CTX_new]
= EVP_PKEY_CTX_new
:mrdocs:

Allocate a key context for operations with `pkey.`

== Synopsis

Declared in `<openssl/evp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]*
EVP_PKEY_CTX_new(
    xref:EVP_PKEY.adoc[EVP_PKEY]* pkey,
    xref:ENGINE.adoc[ENGINE]* e);
----

== Return Value

New EVP_PKEY_CTX, or NULL on error; free with EVP_PKEY_CTX_free().

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pkey*
| Key that supplies the algorithm and material for the context.
| *e*
| Optional ENGINE implementing the algorithm, or NULL.
|===


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