[#EVP_PKEY_CTX_get0_rsa_oaep_label]
= EVP_PKEY_CTX_get0_rsa_oaep_label
:mrdocs:

Return a non‐owning pointer to the RSA‐OAEP label configured on an EVP_PKEY_CTX.

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_CTX_get0_rsa_oaep_label(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    unsigned char** label);
----

== Return Value

Label length in bytes on success, or a negative value for unsupported / failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Context whose padding mode must be RSA_PKCS1_OAEP_PADDING.
| *label*
| Receives a pointer to the internal label bytes (do not free); may be NULL.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#