[#ASN1_TIME_compare]
= ASN1_TIME_compare
:mrdocs:

Compare two ASN.1 time values chronologically.

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASN1_TIME_compare(
    xref:ASN1_TIME.adoc[ASN1_TIME] const* a,
    xref:ASN1_TIME.adoc[ASN1_TIME] const* b);
----

== Return Value

1 if `a` is later than `b,` ‐1 if `a` is earlier, 0 if equal, or ‐2 if either time is invalid.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| First time.
| *b*
| Second time.
|===


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