141 lines
4.1 KiB
Groff
141 lines
4.1 KiB
Groff
.\" $OpenBSD: DSA_SIG_new.3,v 1.8 2019/06/10 14:58:48 schwarze Exp $
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.\" full merge up to: OpenSSL b97fdb57 Nov 11 09:33:09 2016 +0100
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.\"
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.\" This file was written by Ulf Moeller <ulf@openssl.org>,
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.\" Dr. Stephen Henson <steve@openssl.org>, and
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.\" TJ Saunders <tj@castaglia.org>.
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.\" Copyright (c) 2000, 2016 The OpenSSL Project. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in
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.\" the documentation and/or other materials provided with the
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.\" distribution.
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.\"
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.\" 3. All advertising materials mentioning features or use of this
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.\" software must display the following acknowledgment:
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.\" "This product includes software developed by the OpenSSL Project
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.\" for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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.\"
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.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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.\" endorse or promote products derived from this software without
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.\" prior written permission. For written permission, please contact
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.\" openssl-core@openssl.org.
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.\"
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.\" 5. Products derived from this software may not be called "OpenSSL"
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.\" nor may "OpenSSL" appear in their names without prior written
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.\" permission of the OpenSSL Project.
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.\"
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.\" 6. Redistributions of any form whatsoever must retain the following
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.\" acknowledgment:
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.\" "This product includes software developed by the OpenSSL Project
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.\" for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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.\" OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd $Mdocdate: June 10 2019 $
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.Dt DSA_SIG_NEW 3
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.Os
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.Sh NAME
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.Nm DSA_SIG_new ,
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.Nm DSA_SIG_free ,
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.Nm DSA_SIG_get0 ,
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.Nm DSA_SIG_set0
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.Nd manipulate DSA signature objects
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.Sh SYNOPSIS
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.In openssl/dsa.h
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.Ft DSA_SIG *
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.Fn DSA_SIG_new void
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.Ft void
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.Fo DSA_SIG_free
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.Fa "DSA_SIG *sig"
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.Fc
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.Ft void
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.Fo DSA_SIG_get0
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.Fa "const DSA_SIG *sig"
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.Fa "const BIGNUM **r"
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.Fa "const BIGNUM **s"
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.Fc
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.Ft int
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.Fo DSA_SIG_set0
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.Fa "DSA_SIG *sig"
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.Fa "BIGNUM *r"
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.Fa "BIGNUM *s"
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.Fc
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.Sh DESCRIPTION
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.Fn DSA_SIG_new
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allocates an empty
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.Vt DSA_SIG
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structure.
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.Pp
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.Fn DSA_SIG_free
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frees the
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.Vt DSA_SIG
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structure and its components.
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The values are erased before the memory is returned to the system.
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If
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.Fa sig
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is a
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.Dv NULL
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pointer, no action occurs.
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.Pp
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.Fn DSA_SIG_get0
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retrieves internal pointers to the
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.Fa r
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and
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.Fa s
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values contained in
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.Fa sig .
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.Pp
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The
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.Fa r
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and
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.Fa s
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values can be set by calling
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.Fn DSA_SIG_set0 .
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Calling this function transfers the memory management of the values to
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.Fa sig ,
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and therefore they should not be freed by the caller.
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.Sh RETURN VALUES
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If the allocation fails,
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.Fn DSA_SIG_new
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returns
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.Dv NULL
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and sets an error code that can be obtained by
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.Xr ERR_get_error 3 .
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Otherwise it returns a pointer to the newly allocated structure.
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.Pp
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.Fn DSA_SIG_set0
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returns 1 on success or 0 on failure.
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.Sh SEE ALSO
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.Xr DSA_do_sign 3 ,
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.Xr DSA_new 3
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.Sh HISTORY
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.Fn DSA_SIG_new
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and
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.Fn DSA_SIG_free
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first appeared in OpenSSL 0.9.3 and have been available since
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.Ox 2.6 .
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.Pp
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.Fn DSA_SIG_get0
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and
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.Fn DSA_SIG_set0
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first appeared in OpenSSL 1.1.0 and have been available since
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.Ox 6.3 .
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