Android_verify/third_party/android-libs/share/man/man3/X509_check_purpose.3ossl

.\" Automatically generated by Pod::Man 4.14 (Pod::Simple 3.42)
.\"
.\" 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_CHECK_PURPOSE 3ossl"
.TH X509_CHECK_PURPOSE 3ossl "2024-09-03" "3.3.2" "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_check_purpose \- Check the purpose of a certificate
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/x509v3.h>
\&
\& int X509_check_purpose(X509 *x, int id, int ca);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
This function checks if certificate \fIx\fR was created with the purpose
represented by \fIid\fR. If \fIca\fR is nonzero, then certificate \fIx\fR is
checked to determine if it's a possible \s-1CA\s0 with various levels of certainty
possibly returned. The certificate \fIx\fR must be a complete certificate
otherwise the function returns an error.
.PP
Below are the potential \s-1ID\s0's that can be checked:
.PP
.Vb 10
\& # define X509_PURPOSE_SSL_CLIENT        1
\& # define X509_PURPOSE_SSL_SERVER        2
\& # define X509_PURPOSE_NS_SSL_SERVER     3
\& # define X509_PURPOSE_SMIME_SIGN        4
\& # define X509_PURPOSE_SMIME_ENCRYPT     5
\& # define X509_PURPOSE_CRL_SIGN          6
\& # define X509_PURPOSE_ANY               7
\& # define X509_PURPOSE_OCSP_HELPER       8
\& # define X509_PURPOSE_TIMESTAMP_SIGN    9
\& # define X509_PURPOSE_CODE_SIGN        10
.Ve
.PP
The checks performed take into account the X.509 extensions
keyUsage, extendedKeyUsage, and basicConstraints.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
For non-CA checks
.IP "\-1 an error condition has occurred" 4
.IX Item "-1 an error condition has occurred"
.PD 0
.IP " 1 if the certificate was created to perform the purpose represented by \fIid\fR" 4
.IX Item " 1 if the certificate was created to perform the purpose represented by id"
.IP " 0 if the certificate was not created to perform the purpose represented by \fIid\fR" 4
.IX Item " 0 if the certificate was not created to perform the purpose represented by id"
.PD
.PP
For \s-1CA\s0 checks the below integers could be returned with the following meanings:
.IP "\-1 an error condition has occurred" 4
.IX Item "-1 an error condition has occurred"
.PD 0
.IP " 0 not a \s-1CA\s0 or does not have the purpose represented by \fIid\fR" 4
.IX Item " 0 not a CA or does not have the purpose represented by id"
.IP " 1 is a \s-1CA.\s0" 4
.IX Item " 1 is a CA."
.IP " 2 Only possible in old versions of openSSL when basicConstraints are absent. New versions will not return this value. May be a \s-1CA\s0" 4
.IX Item " 2 Only possible in old versions of openSSL when basicConstraints are absent. New versions will not return this value. May be a CA"
.IP " 3 basicConstraints absent but self signed V1." 4
.IX Item " 3 basicConstraints absent but self signed V1."
.IP " 4 basicConstraints absent but keyUsage present and keyCertSign asserted." 4
.IX Item " 4 basicConstraints absent but keyUsage present and keyCertSign asserted."
.IP " 5 legacy Netscape specific \s-1CA\s0 Flags present" 4
.IX Item " 5 legacy Netscape specific CA Flags present"
.PD
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2019\-2021 The OpenSSL Project Authors. All Rights Reserved.
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>.