[#BASIC_CONSTRAINTS_st]
= BASIC&lowbar;CONSTRAINTS&lowbar;st
:mrdocs:

Basic Constraints extension&colon; whether the subject is a CA and optional path length&period;

== Synopsis

Declared in `&lt;openssl&sol;x509v3&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct BASIC&lowbar;CONSTRAINTS&lowbar;st;
----

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:BASIC_CONSTRAINTS_st/ca.adoc[`ca`] 
| Non&hyphen;zero if the subject may act as a certification authority&period;
| xref:BASIC_CONSTRAINTS_st/pathlen.adoc[`pathlen`] 
| Maximum number of intermediate CA certificates below this CA, or NULL if unlimited&period;
|===



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