[#OSSL_HPKE_get_grease_value]
= OSSL_HPKE_get_grease_value
:mrdocs:

Produce GREASE‐like random encap and ciphertext buffers sized for an HPKE suite.

== Synopsis

Declared in `<openssl/hpke.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_HPKE_get_grease_value(
    OSSL_HPKE_SUITE const* suite_in,
    OSSL_HPKE_SUITE* suite,
    unsigned char* enc,
    size_t* enclen,
    unsigned char* ct,
    size_t ctlen,
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    char const* propq);
----

== Return Value

1 on success, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *suite_in*
| Preferred suite for sizing, or NULL to pick a random supported suite.
| *suite*
| Optional output receiving the suite actually used for sizing.
| *enc*
| Destination for a random encapsulated‐key‐sized buffer.
| *enclen*
| In/out length of `enc.`
| *ct*
| Destination for a random ciphertext‐sized buffer of length `ctlen.`
| *ctlen*
| Desired ciphertext buffer length (and plaintext‐equivalent sizing input).
| *libctx*
| Library context, or NULL for the default.
| *propq*
| Optional property query string, or NULL.
|===


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