[#BN_X931_derive_prime_ex]
= BN_X931_derive_prime_ex
:mrdocs:

Derive an X9.31 prime p from Xp/Xp1/Xp2 parameters (deprecated).

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
int
BN_X931_derive_prime_ex(
    xref:BIGNUM.adoc[BIGNUM]* p,
    xref:BIGNUM.adoc[BIGNUM]* p1,
    xref:BIGNUM.adoc[BIGNUM]* p2,
    xref:BIGNUM.adoc[BIGNUM] const* Xp,
    xref:BIGNUM.adoc[BIGNUM] const* Xp1,
    xref:BIGNUM.adoc[BIGNUM] const* Xp2,
    xref:BIGNUM.adoc[BIGNUM] const* e,
    xref:BN_CTX.adoc[BN_CTX]* ctx,
    xref:BN_GENCB.adoc[BN_GENCB]* cb);
----

[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
| *p*
| Destination for the derived prime.
| *p1*
| Optional destination for the first auxiliary prime, or NULL.
| *p2*
| Optional destination for the second auxiliary prime, or NULL.
| *Xp*
| Random parameter used to construct p.
| *Xp1*
| Random parameter used to construct p1.
| *Xp2*
| Random parameter used to construct p2.
| *e*
| Public exponent that must be coprime to p‐1.
| *ctx*
| BN_CTX for temporaries.
| *cb*
| Optional generation callback, or NULL.
|===


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