339 lines
9.4 KiB
Groff
339 lines
9.4 KiB
Groff
.rn '' }`
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'''
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'''
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.de Sh
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.br
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.if t .Sp
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.ne 5
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.PP
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\fB\\$1\fR
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.PP
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..
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.de Sp
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.if t .sp .5v
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.if n .sp
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..
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.de Ip
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.br
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.ie \\n(.$>=3 .ne \\$3
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.el .ne 3
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.IP "\\$1" \\$2
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..
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.de Vb
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.ft CW
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.nf
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.ne \\$1
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..
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.de Ve
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.ft R
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.fi
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..
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'''
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'''
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''' Set up \*(-- to give an unbreakable dash;
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''' string Tr holds user defined translation string.
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''' Bell System Logo is used as a dummy character.
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'''
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.tr \(*W-|\(bv\*(Tr
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.ie n \{\
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.ds -- \(*W-
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.ds PI pi
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.if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
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.if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
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.ds L" ""
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.ds R" ""
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''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
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''' \*(L" and \*(R", except that they are used on ".xx" lines,
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''' such as .IP and .SH, which do another additional levels of
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''' double-quote interpretation
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.ds M" """
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.ds S" """
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.ds N" """""
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.ds T" """""
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.ds L' '
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.ds M' '
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.ds S' '
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.ds N' '
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.ds T' '
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'br\}
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.el\{\
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.ds -- \(em\|
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.tr \*(Tr
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.ds L" ``
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.ds R" ''
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.ds M" ``
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.ds S" ''
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.ds N" ``
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.ds T" ''
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.ds L' `
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.ds R' '
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.ds M' `
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.ds S' '
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.ds N' `
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.ds T' '
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.ds PI \(*p
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'br\}
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.\" If the F register is turned on, we'll generate
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.\" index entries out stderr for the following things:
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.\" TH Title
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.\" SH Header
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.\" Sh Subsection
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.\" Ip Item
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.\" X<> Xref (embedded
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.\" Of course, you have to process the output yourself
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.\" in some meaninful fashion.
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.if \nF \{
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.de IX
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.tm Index:\\$1\t\\n%\t"\\$2"
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..
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.nr % 0
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.rr F
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.\}
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.TH openssl.cnf 5 "0.9.5a" "22/Jul/2000" "OpenSSL"
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.UC
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.if n .hy 0
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.if n .na
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.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
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.de CQ \" put $1 in typewriter font
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.ft CW
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'if n "\c
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'if t \\&\\$1\c
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'if n \\&\\$1\c
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'if n \&"
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\\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
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'.ft R
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..
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.\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
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. \" AM - accent mark definitions
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.bd B 3
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. \" fudge factors for nroff and troff
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.if n \{\
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. ds #F .3m
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. ds #] \fP
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.\}
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.if t \{\
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. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
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. ds #V .6m
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. ds #F 0
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. ds #] \&
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.\}
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. \" simple accents for nroff and troff
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.if n \{\
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. ds ' \&
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. ds ` \&
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. ds ^ \&
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. ds , \&
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. ds ~ ~
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. ds ? ?
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. ds ! !
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. ds /
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. ds q
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.\}
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.if t \{\
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. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
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. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
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. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
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. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
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. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
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. ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
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. ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
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. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
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. ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
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.\}
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. \" troff and (daisy-wheel) nroff accents
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.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
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.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
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.ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
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.ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
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.ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
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.ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
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.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
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.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
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.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
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.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
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.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
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.ds ae a\h'-(\w'a'u*4/10)'e
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.ds Ae A\h'-(\w'A'u*4/10)'E
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.ds oe o\h'-(\w'o'u*4/10)'e
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.ds Oe O\h'-(\w'O'u*4/10)'E
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. \" corrections for vroff
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.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
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.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
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. \" for low resolution devices (crt and lpr)
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.if \n(.H>23 .if \n(.V>19 \
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\{\
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. ds : e
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. ds 8 ss
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. ds v \h'-1'\o'\(aa\(ga'
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. ds _ \h'-1'^
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. ds . \h'-1'.
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. ds 3 3
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. ds o a
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. ds d- d\h'-1'\(ga
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. ds D- D\h'-1'\(hy
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. ds th \o'bp'
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. ds Th \o'LP'
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. ds ae ae
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. ds Ae AE
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. ds oe oe
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. ds Oe OE
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.\}
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.rm #[ #] #H #V #F C
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.SH "NAME"
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openssl.cnf \- OpenSSL CONF library configuration files
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.SH "DESCRIPTION"
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The OpenSSL CONF library can be used to read configuration files.
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It is used for the OpenSSL master configuration file \fBopenssl.cnf\fR
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and in a few other places like \fBSPKAC\fR files and certificate extension
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files for the \fBx509\fR utility.
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.PP
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A configuration file is divided into a number of sections. Each section
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starts with a line \fB[ section_name ]\fR and ends when a new section is
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started or end of file is reached. A section name can consist of
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alphanumeric characters and underscores.
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.PP
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The first section of a configuration file is special and is referred
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to as the \fBdefault\fR section this is usually unnamed and is from the
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start of file until the first named section. When a name is being looked up
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it is first looked up in a named section (if any) and then the
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default section.
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.PP
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The environment is mapped onto a section called \fBENV\fR.
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.PP
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Comments can be included by preceding them with the \fB#\fR character
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.PP
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Each section in a configuration file consists of a number of name and
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value pairs of the form \fBname=value\fR
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.PP
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The \fBname\fR string can contain any alphanumeric characters as well as
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a few punctuation symbols such as \fB.\fR \fB,\fR \fB;\fR and \fB_\fR.
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.PP
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The \fBvalue\fR string consists of the string following the \fB=\fR character
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until end of line with any leading and trailing white space removed.
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.PP
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The value string undergoes variable expansion. This can be done by
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including the form \fB$var\fR or \fB${var}\fR: this will substitute the value
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of the named variable in the current section. It is also possible to
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substitute a value from another section using the syntax \fB$section::name\fR
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or \fB${section::name}\fR. By using the form \fB$ENV::name\fR environment
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variables can be substituted. It is also possible to assign values to
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environment variables by using the name \fBENV::name\fR, this will work
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if the program looks up environment variables using the \fBCONF\fR library
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instead of calling \fBgetenv()\fR directly.
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.PP
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It is possible to escape certain characters by using any kind of quote
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or the \fB\e\fR character. By making the last character of a line a \fB\e\fR
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a \fBvalue\fR string can be spread across multiple lines. In addition
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the sequences \fB\en\fR, \fB\er\fR, \fB\eb\fR and \fB\et\fR are recognized.
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.SH "NOTES"
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If a configuration file attempts to expand a variable that doesn't exist
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then an error is flagged and the file will not load. This can happen
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if an attempt is made to expand an environment variable that doesn't
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exist. For example the default OpenSSL master configuration file used
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the value of \fBHOME\fR which may not be defined on non Unix systems.
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.PP
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This can be worked around by including a \fBdefault\fR section to provide
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a default value: then if the environment lookup fails the default value
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will be used instead. For this to work properly the default value must
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be defined earlier in the configuration file than the expansion. See
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the \fBEXAMPLES\fR section for an example of how to do this.
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.PP
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If the same variable exists in the same section then all but the last
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value will be silently ignored. In certain circumstances such as with
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DNs the same field may occur multiple times. This is usually worked
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around by ignoring any characters before an initial \fB.\fR e.g.
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.PP
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.Vb 2
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\& 1.OU="My first OU"
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\& 2.OU="My Second OU"
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.Ve
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.SH "EXAMPLES"
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Here is a sample configuration file using some of the features
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mentioned above.
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.PP
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.Vb 5
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\& # This is the default section.
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\&
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\& HOME=/temp
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\& RANDFILE= ${ENV::HOME}/.rnd
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\& configdir=$ENV::HOME/config
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.Ve
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.Vb 1
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\& [ section_one ]
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.Ve
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.Vb 1
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\& # We are now in section one.
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.Ve
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.Vb 2
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\& # Quotes permit leading and trailing whitespace
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\& any = " any variable name "
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.Ve
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.Vb 3
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\& other = A string that can \e
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\& cover several lines \e
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\& by including \e\e characters
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.Ve
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.Vb 1
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\& message = Hello World\en
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.Ve
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.Vb 1
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\& [ section_two ]
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.Ve
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.Vb 1
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\& greeting = $section_one::message
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.Ve
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This next example shows how to expand environment variables safely.
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.PP
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Suppose you want a variable called \fBtmpfile\fR to refer to a
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temporary filename. The directory it is placed in can determined by
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the the \fBTEMP\fR or \fBTMP\fR environment variables but they may not be
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set to any value at all. If you just include the environment variable
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names and the variable doesn't exist then this will cause an error when
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an attempt is made to load the configuration file. By making use of the
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default section both values can be looked up with \fBTEMP\fR taking
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priority and \fB/tmp\fR used if neither is defined:
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.PP
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.Vb 5
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\& TMP=/tmp
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\& # The above value is used if TMP isn't in the environment
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\& TEMP=$ENV::TMP
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\& # The above value is used if TEMP isn't in the environment
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\& tmpfile=${ENV::TEMP}/tmp.filename
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.Ve
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.SH "BUGS"
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Currently there is no way to include characters using the octal \fB\ennn\fR
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form. Strings are all null terminated so nulls cannot form part of
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the value.
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.PP
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The escaping isn't quite right: if you want to use sequences like \fB\en\fR
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you can't use any quote escaping on the same line.
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.PP
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Files are loaded in a single pass. This means that an variable expansion
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will only work if the variables referenced are defined earlier in the
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file.
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.SH "SEE ALSO"
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the \fIx509(1)|x509(1)\fR manpage, the \fIreq(1)|req(1)\fR manpage, the \fIca(1)|ca(1)\fR manpage
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.rn }` ''
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.IX Title "openssl.cnf 5"
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.IX Name "openssl.cnf - OpenSSL CONF library configuration files"
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.IX Header "NAME"
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.IX Header "DESCRIPTION"
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.IX Header "NOTES"
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.IX Header "EXAMPLES"
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.IX Header "BUGS"
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.IX Header "SEE ALSO"
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