[#EVP_PKEY_CTX_set_rsa_mgf1_md_name]
= EVP_PKEY_CTX_set_rsa_mgf1_md_name
:mrdocs:

Set the MGF1 digest for RSA‐PSS or RSA‐OAEP by algorithm name.

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
EVP_PKEY_CTX_set_rsa_mgf1_md_name(
    xref:EVP_PKEY_CTX.adoc[EVP_PKEY_CTX]* ctx,
    char const* mdname,
    char const* mdprops);
----

== Return Value

1 on success, or a negative value on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Key operation context configured for RSA padding that uses MGF1.
| *mdname*
| Digest name (for example "SHA256").
| *mdprops*
| Optional property query for fetching `mdname,` or NULL.
|===


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