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.\" $OpenBSD: X509_get0_signature.3,v 1.5 2018/03/23 23:18:17 schwarze Exp $
.\" selective merge up to:
.\" OpenSSL man3/X509_get0_signature 2f7a2520 Apr 25 17:28:08 2017 +0100
.\"
.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
.\" Copyright (c) 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: March 23 2018 $
.Dt X509_GET0_SIGNATURE 3
.Os
.Sh NAME
.Nm X509_get0_signature ,
.Nm X509_REQ_get0_signature ,
.Nm X509_CRL_get0_signature ,
.Nm X509_get0_tbs_sigalg ,
.Nm X509_get_signature_nid ,
.Nm X509_REQ_get_signature_nid ,
.Nm X509_CRL_get_signature_nid
.Nd signature information
.Sh SYNOPSIS
.In openssl/x509.h
.Ft void
.Fo X509_get0_signature
.Fa "const ASN1_BIT_STRING **psig"
.Fa "const X509_ALGOR **palg"
.Fa "const X509 *x"
.Fc
.Ft void
.Fo X509_REQ_get0_signature
.Fa "const X509_REQ *req"
.Fa "const ASN1_BIT_STRING **psig"
.Fa "const X509_ALGOR **palg"
.Fc
.Ft void
.Fo X509_CRL_get0_signature
.Fa "const X509_CRL *crl"
.Fa "const ASN1_BIT_STRING **psig"
.Fa "const X509_ALGOR **palg"
.Fc
.Ft const X509_ALGOR *
.Fo X509_get0_tbs_sigalg
.Fa "const X509 *x"
.Fc
.Ft int
.Fo X509_get_signature_nid
.Fa "const X509 *x"
.Fc
.Ft int
.Fo X509_REQ_get_signature_nid
.Fa "const X509_REQ *req"
.Fc
.Ft int
.Fo X509_CRL_get_signature_nid
.Fa "const X509_CRL *crl"
.Fc
.Sh DESCRIPTION
.Fn X509_get0_signature ,
.Fn X509_REQ_get0_signature ,
and
.Fn X509_CRL_get0_signature
set
.Pf * Fa psig
to the signature and
.Pf * Fa palg
to the signature algorithm of
.Fa x ,
.Fa req ,
or
.Fa crl ,
respectively.
.Fn X509_get0_tbs_sigalg
returns the signature algorithm in the signed portion of
.Fa x .
The values returned are internal pointers
that must not be freed by the caller.
.Pp
.Fn X509_get_signature_nid ,
.Fn X509_REQ_get_signature_nid ,
and
.Fn X509_CRL_get_signature_nid
return the NID corresponding to the signature algorithm of
.Fa x ,
.Fa req ,
or
.Fa crl ,
respectively.
.Pp
These functions provide lower level access to the signature
for cases where an application wishes to analyse or generate a
signature in a form where
.Xr X509_sign 3
is not appropriate, for example in a non-standard or unsupported format.
.Sh SEE ALSO
.Xr OBJ_obj2nid 3 ,
.Xr X509_ALGOR_new 3 ,
.Xr X509_CRL_get0_by_serial 3 ,
.Xr X509_CRL_new 3 ,
.Xr X509_get_pubkey 3 ,
.Xr X509_get_subject_name 3 ,
.Xr X509_get_version 3 ,
.Xr X509_new 3 ,
.Xr X509_REQ_new 3 ,
.Xr X509_sign 3 ,
.Xr X509_verify_cert 3
.Sh HISTORY
.Fn X509_get0_signature
and
.Fn X509_get_signature_nid
first appeared in OpenSSL 1.0.2.
.Fn X509_REQ_get0_signature ,
.Fn X509_CRL_get0_signature ,
.Fn X509_get0_tbs_sigalg ,
.Fn X509_REQ_get_signature_nid ,
and
.Fn X509_CRL_get_signature_nid
first appeared in OpenSSL 1.1.0.
All these functions have been available since
.Ox 6.3 .
|
