[#EVP_PKEY_derive_set_peer]
= EVP_PKEY_derive_set_peer
:mrdocs:

Set the peer public key used by EVP_PKEY_derive() on a derivation context.

== Synopsis

Declared in `<openssl/evp.h>`

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

== Return Value

1 on success, or a negative value / 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Initialized derive context from EVP_PKEY_derive_init().
| *peer*
| Peer public key; ownership is not transferred.
|===


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