[#DSA_sign_setup]
= DSA_sign_setup
:mrdocs:

Legacy DSA precomputation stub retained for ABI compatibility (deprecated; do not use).

== Synopsis

Declared in `<openssl/dsa.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
DSA_sign_setup(
    xref:DSA.adoc[DSA]* dsa,
    xref:BN_CTX.adoc[BN_CTX]* ctx_in,
    xref:BIGNUM.adoc[BIGNUM]** kinvp,
    xref:BIGNUM.adoc[BIGNUM]** rp);
----

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

Calling this only adds overhead; it does not affect DSA_sign().

== Return Value

1 on success, or 0 / ‐1 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dsa*
| DSA key (unused for signature math since OpenSSL 1.1.0 opaque DSA).
| *ctx_in*
| Optional BN_CTX, or NULL.
| *kinvp*
| Receives allocated BIGNUM output historically used as kˆ‐1 (caller frees); may be unused.
| *rp*
| Receives allocated BIGNUM output historically used as r (caller frees); may be unused.
|===


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