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1.\" $OpenBSD: ASN1_UNIVERSALSTRING_to_string.3,v 1.1 2021/11/15 13:39:40 schwarze Exp $
2.\"
3.\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org>
4.\"
5.\" Permission to use, copy, modify, and distribute this software for any
6.\" purpose with or without fee is hereby granted, provided that the above
7.\" copyright notice and this permission notice appear in all copies.
8.\"
9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16.\"
17.Dd $Mdocdate: November 15 2021 $
18.Dt ASN1_UNIVERSALSTRING_TO_STRING 3
19.Os
20.Sh NAME
21.Nm ASN1_UNIVERSALSTRING_to_string
22.Nd recode UTF-32 to ISO Latin-1
23.Sh SYNOPSIS
24.In openssl/asn1.h
25.Ft int
26.Fo ASN1_UNIVERSALSTRING_to_string
27.Fa "ASN1_UNIVERSALSTRING *string"
28.Fc
29.Sh DESCRIPTION
30.Fn ASN1_UNIVERSALSTRING_to_string
31assumes that the given
32.Fa string
33is encoded in UTF-32, recodes it in place to ISO Latin-1,
34and changes the type according to
35.Xr ASN1_PRINTABLE_type 3 .
36.Pp
37.Fn ASN1_UNIVERSALSTRING_to_string
38fails and leaves the
39.Fa string
40unchanged if its
41.Xr ASN1_STRING_type 3
42is not
43.Dv V_ASN1_UNIVERSALSTRING ,
44if its
45.Xr ASN1_STRING_length 3
46is not a multiple of four bytes,
47or if any of its characters cannot be represented in ISO Latin-1.
48.Pp
49In case of success, the
50.Xr ASN1_STRING_length 3
51of the
52.Fa string
53is reduced by a factor of four.
54.Sh RETURN VALUES
55.Fn ASN1_UNIVERSALSTRING_to_string
56returns 1 on success or 0 on failure.
57.Sh SEE ALSO
58.Xr ASN1_mbstring_copy 3 ,
59.Xr ASN1_STRING_new 3 ,
60.Xr ASN1_STRING_to_UTF8 3
61.Sh HISTORY
62.Fn ASN1_UNIVERSALSTRING_to_string
63first appeared in SSLeay 0.8.0 and has been available since
64.Ox 2.4 .