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.\" $OpenBSD: X509_new.3,v 1.4 2016/12/05 18:26:16 schwarze Exp $
.\" OpenSSL 3a59ad98 Dec 11 00:36:06 2015 +0000
.\"
.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
.\" Copyright (c) 2002, 2006, 2015 The OpenSSL Project. All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\"
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\"
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in
.\" the documentation and/or other materials provided with the
.\" distribution.
.\"
.\" 3. All advertising materials mentioning features or use of this
.\" software must display the following acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
.\"
.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
.\" endorse or promote products derived from this software without
.\" prior written permission. For written permission, please contact
.\" openssl-core@openssl.org.
.\"
.\" 5. Products derived from this software may not be called "OpenSSL"
.\" nor may "OpenSSL" appear in their names without prior written
.\" permission of the OpenSSL Project.
.\"
.\" 6. Redistributions of any form whatsoever must retain the following
.\" acknowledgment:
.\" "This product includes software developed by the OpenSSL Project
.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)"
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
.\" OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd $Mdocdate: December 5 2016 $
.Dt X509_NEW 3
.Os
.Sh NAME
.Nm X509_new ,
.Nm X509_free
.Nd X509 certificate ASN.1 allocation functions
.Sh SYNOPSIS
.In openssl/x509.h
.Ft X509 *
.Fn X509_new void
.Ft void
.Fo X509_free
.Fa "X509 *a"
.Fc
.Ft int
.Fo X509_up_ref
.Fa "X509 *a"
.Fc
.Sh DESCRIPTION
The X509 ASN.1 allocation routines allocate and free an
.Vt X509
structure, which represents an X509 certificate.
.Pp
.Fn X509_new
allocates and initializes a X509 structure with reference count 1.
.Pp
.Fn X509_free
decrements the reference count of the
.Vt X509
structure
.Fa a
and frees it up if the reference count reaches 0.
If
.Fa a
is a
.Dv NULL
pointer, no action occurs.
.Pp
.Fn X509_up_ref
increments the reference count of
.Fa a .
This function is useful if a certificate structure is being used
by several different operations each of which will free it up after
use: this avoids the need to duplicate the entire certificate
structure.
.Sh RETURN VALUES
If the allocation fails,
.Fn X509_new
returns
.Dv NULL
and sets an error code that can be obtained by
.Xr ERR_get_error 3 .
Otherwise it returns a pointer to the newly allocated structure.
.Pp
.Fn X509_up_ref
returns 1 for success or 0 for failure.
.Sh SEE ALSO
.Xr d2i_X509 3 ,
.Xr ERR_get_error 3
.Sh HISTORY
.Fn X509_new
and
.Fn X509_free
are available in all versions of SSLeay and OpenSSL.
|
