[#EVP_PKEY_CTX_set0_dh_kdf_oid]
= EVP_PKEY_CTX_set0_dh_kdf_oid
:mrdocs:

Set the X9.42 KDF OID for DH key derivation, transferring ownership of `oid.`

== Synopsis

Declared in `<openssl/dh.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_CTX_set0_dh_kdf_oid(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    xref:ASN1_OBJECT.adoc[ASN1_OBJECT]* oid);
----

== Return Value

1 on success, or a non‐positive value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Key context configured for a DHX KDF / derive operation.
| *oid*
| ASN.1 object identifying the CEK algorithm; `ctx` takes ownership.
|===


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