.\" $OpenBSD: NAME_CONSTRAINTS_new.3,v 1.3 2018/03/23 00:09:11 schwarze Exp $ .\" .\" Copyright (c) 2016 Ingo Schwarze .\" .\" Permission to use, copy, modify, and distribute this software for any .\" purpose with or without fee is hereby granted, provided that the above .\" copyright notice and this permission notice appear in all copies. .\" .\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES .\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR .\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES .\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" .Dd $Mdocdate: March 23 2018 $ .Dt NAME_CONSTRAINTS_NEW 3 .Os .Sh NAME .Nm NAME_CONSTRAINTS_new , .Nm NAME_CONSTRAINTS_free , .Nm GENERAL_SUBTREE_new , .Nm GENERAL_SUBTREE_free .Nd X.509 CA name constraints extension .Sh SYNOPSIS .In openssl/x509v3.h .Ft NAME_CONSTRAINTS * .Fn NAME_CONSTRAINTS_new void .Ft void .Fn NAME_CONSTRAINTS_free "NAME_CONSTRAINTS *names" .Ft GENERAL_SUBTREE * .Fn GENERAL_SUBTREE_new void .Ft void .Fn GENERAL_SUBTREE_free "GENERAL_SUBTREE *name" .Sh DESCRIPTION X.509 CA certificates can use the name constraints extension to restrict the subject names of subsequent certificates in a certification path. .Pp .Fn NAME_CONSTRAINTS_new allocates and initializes an empty .Vt NAME_CONSTRAINTS object, representing an ASN.1 .Vt NameConstraints structure defined in RFC 5280 section 4.2.1.10. It consists of two .Vt STACK_OF(GENERAL_SUBTREE) objects, one specifying permitted names, the other excluded names. .Fn NAME_CONSTRAINTS_free frees .Fa names . .Pp .Fn GENERAL_SUBTREE_new allocates and initializes an empty .Vt GENERAL_SUBTREE object, representing an ASN.1 .Vt GeneralSubtree structure defined in RFC 5280 section 4.2.1.10. It is a trivial wrapper around the .Vt GENERAL_NAME object documented in .Xr GENERAL_NAME_new 3 . The standard requires the other fields of .Vt GENERAL_SUBTREE to be ignored. .Fn GENERAL_SUBTREE_free frees .Fa name . .Sh RETURN VALUES .Fn NAME_CONSTRAINTS_new and .Fn GENERAL_SUBTREE_new return the new .Vt NAME_CONSTRAINTS or .Vt GENERAL_SUBTREE object, respectively, or .Dv NULL if an error occurs. .Sh SEE ALSO .Xr BASIC_CONSTRAINTS_new 3 , .Xr GENERAL_NAMES_new 3 , .Xr X509_EXTENSION_new 3 , .Xr X509_new 3 .Sh STANDARDS RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile, section 4.2.1.10: Name Constraints .Sh HISTORY .Fn NAME_CONSTRAINTS_new , .Fn NAME_CONSTRAINTS_free , .Fn GENERAL_SUBTREE_new , and .Fn GENERAL_SUBTREE_free first appeared in OpenSSL 0.9.8 and have been available since .Ox 4.5 .