[#OSSL_HPKE_CTX_set1_authpub]
= OSSL_HPKE_CTX_set1_authpub
:mrdocs:

Set the sender authentication public key for AUTH / PSKAUTH modes.

== Synopsis

Declared in `<openssl/hpke.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_HPKE_CTX_set1_authpub(
    xref:OSSL_HPKE_CTX.adoc[OSSL_HPKE_CTX]* ctx,
    unsigned char const* pub,
    size_t publen);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Receiver HPKE context (call before OSSL_HPKE_decap()).
| *pub*
| Encoded sender authentication public key.
| *publen*
| Length of `pub` in bytes.
|===


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