[#OSSL_HPKE_get_ciphertext_size]
= OSSL_HPKE_get_ciphertext_size
:mrdocs:

Return the ciphertext size needed to seal a plaintext of length `clearlen.`

== Synopsis

Declared in `<openssl/hpke.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size_t
OSSL_HPKE_get_ciphertext_size(
    OSSL_HPKE_SUITE suite,
    size_t clearlen);
----

== Return Value

Required ciphertext length, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *suite*
| Suite whose AEAD tag expansion is applied.
| *clearlen*
| Plaintext length in bytes.
|===


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