[#PKCS1_MGF1]
= PKCS1_MGF1
:mrdocs:

Generate a PKCS #1 mask using MGF1 with digest `dgst` (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
PKCS1_MGF1(
    unsigned char* mask,
    long len,
    unsigned char const* seed,
    long seedlen,
    xref:EVP_MD.adoc[EVP_MD] const* dgst);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

0 on success, or ‐1 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *mask*
| Output buffer that receives `len` mask bytes.
| *len*
| Desired mask length in bytes.
| *seed*
| MGF seed (mgfSeed).
| *seedlen*
| Length of `seed` in bytes.
| *dgst*
| Hash function used by MGF1.
|===


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