[#SRP_check_known_gN_param]
= SRP_check_known_gN_param
:mrdocs:

Test whether `g` and `N` match a built‐in RFC 5054 SRP group.

== Synopsis

Declared in `<openssl/srp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
char*
SRP_check_known_gN_param(
    xref:BIGNUM.adoc[BIGNUM] const* g,
    xref:BIGNUM.adoc[BIGNUM] const* N);
----

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

Text group id (for example "2048") when recognized; do not free. NULL if unknown or on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *g*
| Generator to test.
| *N*
| Safe prime modulus to test.
|===


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