[#OSSL_PARAM_set_BN]
= OSSL_PARAM_set_BN
:mrdocs:

Encode a BIGNUM into an unsigned‐integer OSSL_PARAM buffer.

== Synopsis

Declared in `<openssl/params.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
OSSL_PARAM_set_BN(
    xref:OSSL_PARAM.adoc[OSSL_PARAM]* p,
    xref:BIGNUM.adoc[BIGNUM] const* val);
----

== Return Value

1 on success, or 0 on error (including a negative `val).`

== Parameters

[cols="1,4"]
|===
| Name| Description
| *p*
| Parameter whose buffer receives the unsigned big‐endian form of `val.`
| *val*
| Non‐negative BIGNUM to store; must fit in `'s` declared buffer size.
|===


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