[#SRP_Calc_server_key]
= SRP_Calc_server_key
:mrdocs:

Compute the SRP server shared secret S = (A*vˆu)ˆb mod N (deprecated).

== Synopsis

Declared in `<openssl/srp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
xref:BIGNUM.adoc[BIGNUM]*
SRP_Calc_server_key(
    xref:BIGNUM.adoc[BIGNUM] const* A,
    xref:BIGNUM.adoc[BIGNUM] const* v,
    xref:BIGNUM.adoc[BIGNUM] const* u,
    xref:BIGNUM.adoc[BIGNUM] const* b,
    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

Newly allocated shared secret, or NULL on error. Caller must free.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *A*
| Client public value.
| *v*
| User password verifier.
| *u*
| Scrambling parameter from SRP_Calc_u().
| *b*
| Server secret exponent.
| *N*
| Safe prime modulus.
|===


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