[#RSA_padding_add_PKCS1_PSS]
= RSA_padding_add_PKCS1_PSS
:mrdocs:

Encode an EMSA‐PSS padded block for RSA signature (deprecated).

== Synopsis

Declared in `<openssl/rsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
RSA_padding_add_PKCS1_PSS(
    xref:RSA.adoc[RSA]* rsa,
    unsigned char* EM,
    unsigned char const* mHash,
    xref:EVP_MD.adoc[EVP_MD] const* Hash,
    int sLen);
----

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

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *rsa*
| RSA key providing the modulus length.
| *EM*
| Destination encoded message of length RSA_size(`rsa).`
| *mHash*
| Hash of the message being signed.
| *Hash*
| Digest method that produced `mHash` (and used by MGF1 unless configured otherwise).
| *sLen*
| Salt length in bytes, or RSA_PSS_SALTLEN_* special values.
|===


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