[#ASN1_INTEGER_to_BN]
= ASN1_INTEGER_to_BN
:mrdocs:

Convert an ASN.1 INTEGER to a BIGNUM (allocating or reusing `bn).`

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIGNUM.adoc[BIGNUM]*
ASN1_INTEGER_to_BN(
    xref:ASN1_INTEGER.adoc[ASN1_INTEGER] const* ai,
    xref:BIGNUM.adoc[BIGNUM]* bn);
----

== Return Value

Pointer to the BIGNUM result (possibly newly allocated), or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ai*
| Source INTEGER (may be negative).
| *bn*
| Existing BIGNUM to reuse, or NULL to allocate.
|===


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