.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.41)
.\"
.\" Standard preamble:
.\" ========================================================================
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Vb \" Begin verbatim text
.ft CW
.nf
.ne \\$1
..
.de Ve \" End verbatim text
.ft R
.fi
..
.\" Set up some character translations and predefined strings.  \*(-- will
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
.\" double quote, and \*(R" will give a right double quote.  \*(C+ will
.\" give a nicer C++.  Capital omega is used to do unbreakable dashes and
.\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
.\" nothing in troff, for use with C<>.
.tr \(*W-
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.ie n \{\
.    ds -- \(*W-
.    ds PI pi
.    if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.    if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\"  diablo 12 pitch
.    ds L" ""
.    ds R" ""
.    ds C` ""
.    ds C' ""
'br\}
.el\{\
.    ds -- \|\(em\|
.    ds PI \(*p
.    ds L" ``
.    ds R" ''
.    ds C`
.    ds C'
'br\}
.\"
.\" Escape single quotes in literal strings from groff's Unicode transform.
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\"
.\" If the F register is >0, we'll generate index entries on stderr for
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
.\" entries marked with X<> in POD.  Of course, you'll have to process the
.\" output yourself in some meaningful fashion.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
.    if \nF \{\
.        de IX
.        tm Index:\\$1\t\\n%\t"\\$2"
..
.        if !\nF==2 \{\
.            nr % 0
.            nr F 2
.        \}
.    \}
.\}
.rr rF
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.    \" fudge factors for nroff and troff
.if n \{\
.    ds #H 0
.    ds #V .8m
.    ds #F .3m
.    ds #[ \f1
.    ds #] \fP
.\}
.if t \{\
.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
.    ds #V .6m
.    ds #F 0
.    ds #[ \&
.    ds #] \&
.\}
.    \" simple accents for nroff and troff
.if n \{\
.    ds ' \&
.    ds ` \&
.    ds ^ \&
.    ds , \&
.    ds ~ ~
.    ds /
.\}
.if t \{\
.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
.    ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
.    ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
.    ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
.\}
.    \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.    \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
.    \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
.    ds : e
.    ds 8 ss
.    ds o a
.    ds d- d\h'-1'\(ga
.    ds D- D\h'-1'\(hy
.    ds th \o'bp'
.    ds Th \o'LP'
.    ds ae ae
.    ds Ae AE
.\}
.rm #[ #] #H #V #F C
.\" ========================================================================
.\"
.IX Title "X509_STORE_CTX_NEW 3"
.TH X509_STORE_CTX_NEW 3 "2020-12-08" "1.1.1i" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
X509_STORE_CTX_new, X509_STORE_CTX_cleanup, X509_STORE_CTX_free, X509_STORE_CTX_init, X509_STORE_CTX_set0_trusted_stack, X509_STORE_CTX_set_cert, X509_STORE_CTX_set0_crls, X509_STORE_CTX_get0_chain, X509_STORE_CTX_set0_verified_chain, X509_STORE_CTX_get0_param, X509_STORE_CTX_set0_param, X509_STORE_CTX_get0_untrusted, X509_STORE_CTX_set0_untrusted, X509_STORE_CTX_get_num_untrusted, X509_STORE_CTX_set_default, X509_STORE_CTX_set_verify, X509_STORE_CTX_verify_fn \&\- X509_STORE_CTX initialisation
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509_vfy.h>
\&
\& X509_STORE_CTX *X509_STORE_CTX_new(void);
\& void X509_STORE_CTX_cleanup(X509_STORE_CTX *ctx);
\& void X509_STORE_CTX_free(X509_STORE_CTX *ctx);
\&
\& int X509_STORE_CTX_init(X509_STORE_CTX *ctx, X509_STORE *store,
\&                         X509 *x509, STACK_OF(X509) *chain);
\&
\& void X509_STORE_CTX_set0_trusted_stack(X509_STORE_CTX *ctx, STACK_OF(X509) *sk);
\&
\& void X509_STORE_CTX_set_cert(X509_STORE_CTX *ctx, X509 *x);
\& STACK_OF(X509) *X509_STORE_CTX_get0_chain(X509_STORE_CTX *ctx);
\& void X509_STORE_CTX_set0_verified_chain(X509_STORE_CTX *ctx, STACK_OF(X509) *chain);
\& void X509_STORE_CTX_set0_crls(X509_STORE_CTX *ctx, STACK_OF(X509_CRL) *sk);
\&
\& X509_VERIFY_PARAM *X509_STORE_CTX_get0_param(X509_STORE_CTX *ctx);
\& void X509_STORE_CTX_set0_param(X509_STORE_CTX *ctx, X509_VERIFY_PARAM *param);
\& int X509_STORE_CTX_set_default(X509_STORE_CTX *ctx, const char *name);
\&
\& STACK_OF(X509)* X509_STORE_CTX_get0_untrusted(X509_STORE_CTX *ctx);
\& void X509_STORE_CTX_set0_untrusted(X509_STORE_CTX *ctx, STACK_OF(X509) *sk);
\&
\& int X509_STORE_CTX_get_num_untrusted(X509_STORE_CTX *ctx);
\&
\& typedef int (*X509_STORE_CTX_verify_fn)(X509_STORE_CTX *);
\& void X509_STORE_CTX_set_verify(X509_STORE_CTX *ctx, X509_STORE_CTX_verify_fn verify);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
These functions initialise an \fBX509_STORE_CTX\fR structure for subsequent use
by \fBX509_verify_cert()\fR.
.PP
\&\fBX509_STORE_CTX_new()\fR returns a newly initialised \fBX509_STORE_CTX\fR structure.
.PP
\&\fBX509_STORE_CTX_cleanup()\fR internally cleans up an \fBX509_STORE_CTX\fR structure.
The context can then be reused with a new call to \fBX509_STORE_CTX_init()\fR.
.PP
\&\fBX509_STORE_CTX_free()\fR completely frees up \fBctx\fR. After this call \fBctx\fR
is no longer valid.
If \fBctx\fR is \s-1NULL\s0 nothing is done.
.PP
\&\fBX509_STORE_CTX_init()\fR sets up \fBctx\fR for a subsequent verification operation.
It must be called before each call to \fBX509_verify_cert()\fR, i.e. a \fBctx\fR is only
good for one call to \fBX509_verify_cert()\fR; if you want to verify a second
certificate with the same \fBctx\fR then you must call \fBX509_STORE_CTX_cleanup()\fR
and then \fBX509_STORE_CTX_init()\fR again before the second call to
\&\fBX509_verify_cert()\fR. The trusted certificate store is set to \fBstore\fR, the end
entity certificate to be verified is set to \fBx509\fR and a set of additional
certificates (which will be untrusted but may be used to build the chain) in
\&\fBchain\fR. Any or all of the \fBstore\fR, \fBx509\fR and \fBchain\fR parameters can be
\&\fB\s-1NULL\s0\fR.
.PP
\&\fBX509_STORE_CTX_set0_trusted_stack()\fR sets the set of trusted certificates of
\&\fBctx\fR to \fBsk\fR. This is an alternative way of specifying trusted certificates
instead of using an \fBX509_STORE\fR.
.PP
\&\fBX509_STORE_CTX_set_cert()\fR sets the certificate to be verified in \fBctx\fR to
\&\fBx\fR.
.PP
\&\fBX509_STORE_CTX_set0_verified_chain()\fR sets the validated chain used
by \fBctx\fR to be \fBchain\fR.
Ownership of the chain is transferred to \fBctx\fR and should not be
free'd by the caller.
\&\fBX509_STORE_CTX_get0_chain()\fR returns the internal pointer used by the
\&\fBctx\fR that contains the validated chain.
.PP
\&\fBX509_STORE_CTX_set0_crls()\fR sets a set of CRLs to use to aid certificate
verification to \fBsk\fR. These CRLs will only be used if \s-1CRL\s0 verification is
enabled in the associated \fBX509_VERIFY_PARAM\fR structure. This might be
used where additional \*(L"useful\*(R" CRLs are supplied as part of a protocol,
for example in a PKCS#7 structure.
.PP
\&\fBX509_STORE_CTX_get0_param()\fR retrieves an internal pointer
to the verification parameters associated with \fBctx\fR.
.PP
\&\fBX509_STORE_CTX_get0_untrusted()\fR retrieves an internal pointer to the
stack of untrusted certificates associated with \fBctx\fR.
.PP
\&\fBX509_STORE_CTX_set0_untrusted()\fR sets the internal point to the stack
of untrusted certificates associated with \fBctx\fR to \fBsk\fR.
.PP
\&\fBX509_STORE_CTX_set0_param()\fR sets the internal verification parameter pointer
to \fBparam\fR. After this call \fBparam\fR should not be used.
.PP
\&\fBX509_STORE_CTX_set_default()\fR looks up and sets the default verification
method to \fBname\fR. This uses the function \fBX509_VERIFY_PARAM_lookup()\fR to
find an appropriate set of parameters from \fBname\fR.
.PP
\&\fBX509_STORE_CTX_get_num_untrusted()\fR returns the number of untrusted certificates
that were used in building the chain following a call to \fBX509_verify_cert()\fR.
.PP
\&\fBX509_STORE_CTX_set_verify()\fR provides the capability for overriding the default
verify function. This function is responsible for verifying chain signatures and
expiration times.
.PP
A verify function is defined as an X509_STORE_CTX_verify type which has the
following signature:
.PP
.Vb 1
\& int (*verify)(X509_STORE_CTX *);
.Ve
.PP
This function should receive the current X509_STORE_CTX as a parameter and
return 1 on success or 0 on failure.
.SH "NOTES"
.IX Header "NOTES"
The certificates and CRLs in a store are used internally and should \fBnot\fR
be freed up until after the associated \fBX509_STORE_CTX\fR is freed.
.SH "BUGS"
.IX Header "BUGS"
The certificates and CRLs in a context are used internally and should \fBnot\fR
be freed up until after the associated \fBX509_STORE_CTX\fR is freed. Copies
should be made or reference counts increased instead.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_STORE_CTX_new()\fR returns a newly allocated context or \fB\s-1NULL\s0\fR if an
error occurred.
.PP
\&\fBX509_STORE_CTX_init()\fR returns 1 for success or 0 if an error occurred.
.PP
\&\fBX509_STORE_CTX_get0_param()\fR returns a pointer to an \fBX509_VERIFY_PARAM\fR
structure or \fB\s-1NULL\s0\fR if an error occurred.
.PP
\&\fBX509_STORE_CTX_cleanup()\fR, \fBX509_STORE_CTX_free()\fR,
\&\fBX509_STORE_CTX_set0_trusted_stack()\fR,
\&\fBX509_STORE_CTX_set_cert()\fR,
\&\fBX509_STORE_CTX_set0_crls()\fR and \fBX509_STORE_CTX_set0_param()\fR do not return
values.
.PP
\&\fBX509_STORE_CTX_set_default()\fR returns 1 for success or 0 if an error occurred.
.PP
\&\fBX509_STORE_CTX_get_num_untrusted()\fR returns the number of untrusted certificates
used.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBX509_verify_cert\fR\|(3)
\&\fBX509_VERIFY_PARAM_set_flags\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
The \fBX509_STORE_CTX_set0_crls()\fR function was added in OpenSSL 1.0.0.
The \fBX509_STORE_CTX_get_num_untrusted()\fR function was added in OpenSSL 1.1.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2009\-2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.