93 lines
3.6 KiB
Groff
93 lines
3.6 KiB
Groff
.\" $OpenBSD: X509_verify_cert.3,v 1.8 2019/06/06 01:06:59 schwarze Exp $
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.\" OpenSSL 99d63d46 Oct 26 13:56:48 2016 -0400
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.\"
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.\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
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.\" Copyright (c) 2009, 2015 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 6 2019 $
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.Dt X509_VERIFY_CERT 3
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.Os
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.Sh NAME
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.Nm X509_verify_cert
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.Nd discover and verify X509 certificate chain
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.Sh SYNOPSIS
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.In openssl/x509.h
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.Ft int
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.Fo X509_verify_cert
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.Fa "X509_STORE_CTX *ctx"
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.Fc
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.Sh DESCRIPTION
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The
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.Fn X509_verify_cert
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function attempts to discover and validate a certificate chain based on
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parameters in
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.Fa ctx .
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.Pp
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Applications rarely call this function directly, but it is used by
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OpenSSL internally for certificate validation, in both the S/MIME and
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SSL/TLS code.
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.Sh RETURN VALUES
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If a complete chain can be built and validated this function returns 1,
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otherwise it returns a value <= 0 indicating failure.
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.Pp
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Additional error information can be obtained by examining
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.Fa ctx ,
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using
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.Xr X509_STORE_CTX_get_error 3 .
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.Sh SEE ALSO
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.Xr openssl 1 ,
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.Xr X509_STORE_CTX_get_error 3 ,
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.Xr X509_STORE_CTX_new 3
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.Sh HISTORY
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.Fn X509_verify_cert
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first appeared in SSLeay 0.8.0 and has been available since
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.Ox 2.4 .
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.Sh BUGS
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This function uses the header
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.In openssl/x509.h
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as opposed to most chain verification functions which use
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.In openssl/x509_vfy.h .
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