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.\" $OpenBSD: ASN1_STRING_TABLE_get.3,v 1.4 2023/12/21 21:23:37 tb Exp $
.\" checked up to:
.\" OpenSSL ASN1_STRING_TABLE_add.pod 7b608d08 Jul 27 01:18:50 2017 +0800
.\"
.\" Copyright (c) 2017, 2021 Ingo Schwarze <schwarze@openbsd.org>
.\"
.\" 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: December 21 2023 $
.Dt ASN1_STRING_TABLE_GET 3
.Os
.Sh NAME
.\" .Nm ASN1_STRING_TABLE_add0 and
.\" .Nm ASN1_STRING_TABLE_cleanup are intentionally undocumented
.\" because they will be removed in the next major bump
.\" .Dv STABLE_FLAGS_MALLOC is intentionally undocumented because it is unused
.Nm ASN1_STRING_TABLE_get
.Nd retrieve an entry from the global ASN.1 string table
.Sh SYNOPSIS
.In openssl/asn1.h
.Ft ASN1_STRING_TABLE *
.Fo ASN1_STRING_TABLE_get
.Fa "int nid"
.Fc
.Sh DESCRIPTION
The ASN.1 string table is a unique global object.
Each entry is of the type
.Vt ASN1_STRING_TABLE
and contains information about one NID object.
The entries are predefined according to RFC 5280 appendix A.1.
.Pp
The upper bounds for the number of characters in various kinds of
.Vt ASN1_STRING
objects are:
.Pp
.Bl -column -compact NID_organizationalUnitNa maxsi ub_organization_unit_na
.It object type Ta maxsize Ta symbolic constant
.It Dv NID_commonName Ta 64 Ta Dv ub_common_name
.It Dv NID_countryName Ta 2 Ta \(em
.It Dv NID_givenName Ta 32768 Ta Dv ub_name
.It Dv NID_initials Ta 32768 Ta Dv ub_name
.It Dv NID_localityName Ta 128 Ta Dv ub_locality_name
.It Dv NID_name Ta 32768 Ta Dv ub_name
.It Dv NID_organizationName Ta 64 Ta Dv ub_organization_name
.It Dv NID_organizationalUnitName Ta 64 Ta Dv ub_organization_unit_name
.It Dv NID_pkcs9_emailAddress Ta 128 Ta Dv ub_email_address
.It Dv NID_serialNumber Ta 64 Ta Dv ub_serial_number
.It Dv NID_stateOrProvinceName Ta 128 Ta Dv ub_state_name
.It Dv NID_surname Ta 32768 Ta Dv ub_name
.El
.Pp
The function
.Fn ASN1_STRING_TABLE_get
retrieves the entry for
.Fa nid .
If the
.Dv STABLE_NO_MASK
flag is set,
.Xr ASN1_STRING_set_by_NID 3
skips applying the global mask that can be set with
.Xr ASN1_STRING_set_default_mask 3 .
.Sh RETURN VALUES
.Fn ASN1_STRING_TABLE_get
returns a valid
.Vt ASN1_STRING_TABLE
structure or
.Dv NULL
if nothing is found.
.Sh SEE ALSO
.Xr ASN1_OBJECT_new 3 ,
.Xr ASN1_STRING_set_by_NID 3 ,
.Xr OBJ_create 3 ,
.Xr OBJ_nid2obj 3
.Sh HISTORY
.Fn ASN1_STRING_TABLE_get
first appeared in OpenSSL 0.9.5 and has been available since
.Ox 2.7 .
.Sh BUGS
Most aspects of the semantics considerably differ from OpenSSL.
.Pp
.Dv ub_email_address ,
which should really be called
.Dv ub_emailaddress_length ,
was changed in RFC 5280 from 128 to 255 to match PKCS#9 (RFC 2985).
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