[#ASN1_TIME_to_tm]
= ASN1_TIME_to_tm
:mrdocs:

Convert an ASN.1 time value to a broken‐down UTC struct tm.

== Synopsis

Declared in `<openssl/asn1.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASN1_TIME_to_tm(
    xref:ASN1_TIME.adoc[ASN1_TIME] const* s,
    tm* tm);
----

== Return Value

1 on success, or 0 if `s` is invalid.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| ASN1_TIME (UTCTime or GeneralizedTime) to convert.
| *tm*
| Destination calendar time in UTC; may be NULL to only validate `s.`
|===


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