[#CMS_RecipientInfo_set0_key]
= CMS_RecipientInfo_set0_key
:mrdocs:

Attach a symmetric key‐encryption key to a KEK RecipientInfo (transfers ownership of `key).`

== Synopsis

Declared in `<openssl/cms.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
CMS_RecipientInfo_set0_key(
    xref:CMS_RecipientInfo.adoc[CMS_RecipientInfo]* ri,
    unsigned char* key,
    size_t keylen);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ri*
| Recipient info of type CMS_RECIPINFO_KEK.
| *key*
| Key bytes allocated with OPENSSL_malloc(); ownership transferred to `ri` (may be NULL to clear).
| *keylen*
| Length of `key` in bytes.
|===


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