[#ASN1_item_i2d_fp]
= ASN1_item_i2d_fp
:mrdocs:

Encode an ASN.1 item to DER and write the encoding to a FILE stream.

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASN1_item_i2d_fp(
    xref:ASN1_ITEM.adoc[ASN1_ITEM] const* it,
    FILE* out,
    void const* x);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *it*
| ASN.1 item descriptor for the type of `x.`
| *out*
| Output stream that receives the DER encoding.
| *x*
| Value to encode (type implied by `it).`
|===


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