[#BIO_new_ex]
= BIO_new_ex
:mrdocs:

Allocate a new BIO for `method` using the given library context.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
BIO_new_ex(
    xref:OSSL_LIB_CTX.adoc[OSSL_LIB_CTX]* libctx,
    xref:BIO_METHOD.adoc[BIO_METHOD] const* method);
----

== Return Value

New BIO, or NULL on allocation failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *libctx*
| Library context associated with the BIO, or NULL for the default.
| *method*
| BIO method that defines the BIO's behaviour.
|===


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