[#BIO_f_asn1]
= BIO_f_asn1
:mrdocs:

Return the filter BIO_METHOD that encodes ASN.1 values to a downstream BIO.

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO_METHOD.adoc[BIO_METHOD] const*
BIO_f_asn1();
----

== Return Value

Pointer to the ASN.1 filter method used with BIO_new() / BIO_new_NDEF().


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