22

✏️ Editing: X509_LOOKUP.3

.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35)
.\"
.\" 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_LOOKUP 3"
.TH X509_LOOKUP 3 "2023-09-11" "1.1.1w" "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_LOOKUP, X509_LOOKUP_TYPE, X509_LOOKUP_new, X509_LOOKUP_free, X509_LOOKUP_init, X509_LOOKUP_shutdown, X509_LOOKUP_set_method_data, X509_LOOKUP_get_method_data, X509_LOOKUP_ctrl, X509_LOOKUP_load_file, X509_LOOKUP_add_dir, X509_LOOKUP_get_store, X509_LOOKUP_by_subject, X509_LOOKUP_by_issuer_serial, X509_LOOKUP_by_fingerprint, X509_LOOKUP_by_alias \&\- OpenSSL certificate lookup mechanisms
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509_vfy.h>
\&
\& typedef x509_lookup_st X509_LOOKUP;
\&
\& typedef enum X509_LOOKUP_TYPE;
\&
\& X509_LOOKUP *X509_LOOKUP_new(X509_LOOKUP_METHOD *method);
\& int X509_LOOKUP_init(X509_LOOKUP *ctx);
\& int X509_LOOKUP_shutdown(X509_LOOKUP *ctx);
\& void X509_LOOKUP_free(X509_LOOKUP *ctx);
\&
\& int X509_LOOKUP_set_method_data(X509_LOOKUP *ctx, void *data);
\& void *X509_LOOKUP_get_method_data(const X509_LOOKUP *ctx);
\&
\& int X509_LOOKUP_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
\&                      long argl, char **ret);
\& int X509_LOOKUP_load_file(X509_LOOKUP *ctx, char *name, long type);
\& int X509_LOOKUP_add_dir(X509_LOOKUP *ctx, char *name, long type);
\&
\& X509_STORE *X509_LOOKUP_get_store(const X509_LOOKUP *ctx);
\&
\& int X509_LOOKUP_by_subject(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
\&                            X509_NAME *name, X509_OBJECT *ret);
\& int X509_LOOKUP_by_issuer_serial(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
\&                                  X509_NAME *name, ASN1_INTEGER *serial,
\&                                  X509_OBJECT *ret);
\& int X509_LOOKUP_by_fingerprint(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
\&                                const unsigned char *bytes, int len,
\&                                X509_OBJECT *ret);
\& int X509_LOOKUP_by_alias(X509_LOOKUP *ctx, X509_LOOKUP_TYPE type,
\&                          const char *str, int len, X509_OBJECT *ret);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBX509_LOOKUP\fR structure holds the information needed to look up
certificates and CRLs according to an associated \fBX509_LOOKUP_METHOD\fR\|(3).
Multiple \fBX509_LOOKUP\fR instances can be added to an \fBX509_STORE\fR\|(3)
to enable lookup in that store.
.PP
\&\fBX509_LOOKUP_new()\fR creates a new \fBX509_LOOKUP\fR using the given lookup
\&\fImethod\fR.
It can also be created by calling \fBX509_STORE_add_lookup\fR\|(3), which
will associate an \fBX509_STORE\fR with the lookup mechanism.
.PP
\&\fBX509_LOOKUP_init()\fR initializes the internal state and resources as
needed by the given \fBX509_LOOKUP\fR to do its work.
.PP
\&\fBX509_LOOKUP_shutdown()\fR tears down the internal state and resources of
the given \fBX509_LOOKUP\fR.
.PP
\&\fBX509_LOOKUP_free()\fR destructs the given \fBX509_LOOKUP\fR.
.PP
\&\fBX509_LOOKUP_set_method_data()\fR associates a pointer to application data
to the given \fBX509_LOOKUP\fR.
.PP
\&\fBX509_LOOKUP_get_method_data()\fR retrieves a pointer to application data
from the given \fBX509_LOOKUP\fR.
.PP
\&\fBX509_LOOKUP_ctrl()\fR is used to set or get additional data to or from an
\&\fBX509_LOOKUP\fR structure or its associated \fBX509_LOOKUP_METHOD\fR\|(3).
The arguments of the control command are passed via \fIargc\fR and \fIargl\fR,
its return value via \fI*ret\fR.
The meaning of the arguments depends on the \fIcmd\fR number of the
control command. In general, this function is not called directly, but
wrapped by a macro call, see below.
The control \fIcmd\fRs known to OpenSSL are discussed in more depth
in \*(L"Control Commands\*(R".
.PP
\&\fBX509_LOOKUP_load_file()\fR passes a filename to be loaded immediately
into the associated \fBX509_STORE\fR.
\&\fItype\fR indicates what type of object is expected.
This can only be used with a lookup using the implementation
\&\fBX509_LOOKUP_file\fR\|(3).
.PP
\&\fBX509_LOOKUP_add_dir()\fR passes a directory specification from which
certificates and CRLs are loaded on demand into the associated
\&\fBX509_STORE\fR.
\&\fItype\fR indicates what type of object is expected.
This can only be used with a lookup using the implementation
\&\fBX509_LOOKUP_hash_dir\fR\|(3).
.PP
\&\fBX509_LOOKUP_load_file()\fR, \fBX509_LOOKUP_add_dir()\fR,
\&\fBX509_LOOKUP_add_store()\fR, and \fBX509_LOOKUP_load_store()\fR are implemented
as macros that use \fBX509_LOOKUP_ctrl()\fR.
.PP
\&\fBX509_LOOKUP_by_subject()\fR, \fBX509_LOOKUP_by_issuer_serial()\fR,
\&\fBX509_LOOKUP_by_fingerprint()\fR, and \fBX509_LOOKUP_by_alias()\fR look up
certificates and CRLs in the \fBX509_STORE\fR\|(3) associated with the
\&\fBX509_LOOKUP\fR using different criteria, where the looked up object is
stored in \fIret\fR.
Some of the underlying \fBX509_LOOKUP_METHOD\fRs will also cache objects
matching the criteria in the associated \fBX509_STORE\fR, which makes it
possible to handle cases where the criteria have more than one hit.
.SS "File Types"
.IX Subsection "File Types"
\&\fBX509_LOOKUP_load_file()\fR and \fBX509_LOOKUP_add_dir()\fR take a \fItype\fR,
which can be one of the following:
.IP "\fBX509_FILETYPE_PEM\fR" 4
.IX Item "X509_FILETYPE_PEM"
The file or files that are loaded are expected to be in \s-1PEM\s0 format.
.IP "\fBX509_FILETYPE_ASN1\fR" 4
.IX Item "X509_FILETYPE_ASN1"
The file or files that are loaded are expected to be in raw \s-1DER\s0 format.
.IP "\fBX509_FILETYPE_DEFAULT\fR" 4
.IX Item "X509_FILETYPE_DEFAULT"
The default certificate file or directory is used.  In this case,
\&\fIname\fR is ignored.
.SS "Control Commands"
.IX Subsection "Control Commands"
The \fBX509_LOOKUP_METHOD\fRs built into OpenSSL recognise the following
\&\fBX509_LOOKUP_ctrl()\fR \fIcmd\fRs:
.IP "\fBX509_L_FILE_LOAD\fR" 4
.IX Item "X509_L_FILE_LOAD"
This is the command that \fBX509_LOOKUP_load_file()\fR uses.
The filename is passed in \fIargc\fR, and the type in \fIargl\fR.
.IP "\fBX509_L_ADD_DIR\fR" 4
.IX Item "X509_L_ADD_DIR"
This is the command that \fBX509_LOOKUP_add_dir()\fR uses.
The directory specification is passed in \fIargc\fR, and the type in
\&\fIargl\fR.
.IP "\fBX509_L_ADD_STORE\fR" 4
.IX Item "X509_L_ADD_STORE"
This is the command that \fBX509_LOOKUP_add_store()\fR uses.
The \s-1URI\s0 is passed in \fIargc\fR.
.IP "\fBX509_L_LOAD_STORE\fR" 4
.IX Item "X509_L_LOAD_STORE"
This is the command that \fBX509_LOOKUP_load_store()\fR uses.
The \s-1URI\s0 is passed in \fIargc\fR.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBX509_LOOKUP_new()\fR returns an \fBX509_LOOKUP\fR pointer when successful,
or \s-1NULL\s0 on error.
.PP
\&\fBX509_LOOKUP_init()\fR and \fBX509_LOOKUP_shutdown()\fR return 1 on success, or
0 on error.
.PP
\&\fBX509_LOOKUP_ctrl()\fR returns \-1 if the \fBX509_LOOKUP\fR doesn't have an
associated \fBX509_LOOKUP_METHOD\fR, or 1 if the 
doesn't have a control function.
Otherwise, it returns what the control function in the
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 in
error.
.IX Xref "509_LOOKUP_METHOD"
.PP
\&\fBX509_LOOKUP_get_store()\fR returns an \fBX509_STORE\fR pointer if there is
one, otherwise \s-1NULL.\s0
.PP
\&\fBX509_LOOKUP_by_subject()\fR, \fBX509_LOOKUP_by_issuer_serial()\fR,
\&\fBX509_LOOKUP_by_fingerprint()\fR, and \fBX509_LOOKUP_by_alias()\fR all return 0
if there is no \fBX509_LOOKUP_METHOD\fR or that method doesn't implement
the corresponding function.
Otherwise, it returns what the corresponding function in the
\&\fBX509_LOOKUP_METHOD\fR returns, which is usually 1 on success and 0 in
error.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBX509_LOOKUP_METHOD\fR\|(3), \fBX509_STORE\fR\|(3)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (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>.

MR SKB