[#SRP_Calc_client_key]
= SRP_Calc_client_key
:mrdocs:

Compute the client session key K for TLS‐SRP (deprecated).

== Synopsis

Declared in `<openssl/srp.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
xref:BIGNUM.adoc[BIGNUM]*
SRP_Calc_client_key(
    xref:BIGNUM.adoc[BIGNUM] const* N,
    xref:BIGNUM.adoc[BIGNUM] const* B,
    xref:BIGNUM.adoc[BIGNUM] const* g,
    xref:BIGNUM.adoc[BIGNUM] const* x,
    xref:BIGNUM.adoc[BIGNUM] const* a,
    xref:BIGNUM.adoc[BIGNUM] const* u);
----

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

Newly allocated session key, or NULL on error. Caller must free.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *N*
| SRP group modulus.
| *B*
| Server public value.
| *g*
| SRP generator.
| *x*
| Private exponent from SRP_Calc_x().
| *a*
| Client ephemeral private exponent.
| *u*
| Scrambling parameter from SRP_Calc_u().
|===


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