[#ASN1_INTEGER_get_uint64]
= ASN1_INTEGER_get_uint64
:mrdocs:

Convert an ASN.1 INTEGER to a host uint64_t (must be non‐negative and in range).

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASN1_INTEGER_get_uint64(
    uint64_t* pr,
    xref:ASN1_INTEGER.adoc[ASN1_INTEGER] const* a);
----

== Return Value

1 on success, or 0 if `a` is NULL, negative, or out of uint64_t range.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *pr*
| Receives the unsigned value on success.
| *a*
| INTEGER to convert.
|===


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