NetBSD/lib/libcrypto/man/SMIME_write_PKCS7.3

.\"	$NetBSD: SMIME_write_PKCS7.3,v 1.1 2003/07/24 14:16:43 itojun Exp $
.\"
.\" Automatically generated by Pod::Man version 1.02
.\" Thu Jul 24 13:08:02 2003
.\"
.\" Standard preamble:
.\" ======================================================================
.de Sh \" Subsection heading
.br
.if t .Sp
.ne 5
.PP
\fB\\$1\fR
.PP
..
.de Sp \" Vertical space (when we can't use .PP)
.if t .sp .5v
.if n .sp
..
.de Ip \" List item
.br
.ie \\n(.$>=3 .ne \\$3
.el .ne 3
.IP "\\$1" \\$2
..
.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.  | will give a
.\" real vertical bar.  \*(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-|\(bv\*(Tr
.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" ''
'br\}
.\"
.\" If the F register is turned on, we'll generate index entries on stderr
.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and
.\" index entries marked with X<> in POD.  Of course, you'll have to process
.\" the output yourself in some meaningful fashion.
.if \nF \{\
.    de IX
.    tm Index:\\$1\t\\n%\t"\\$2"
.    .
.    nr % 0
.    rr F
.\}
.\"
.\" For nroff, turn off justification.  Always turn off hyphenation; it
.\" makes way too many mistakes in technical documents.
.hy 0
.if n .na
.\"
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
.\" Fear.  Run.  Save yourself.  No user-serviceable parts.
.bd B 3
.    \" 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 "SMIME_write_PKCS7 3"
.TH SMIME_write_PKCS7 3 "0.9.7b" "2002-10-19" "OpenSSL"
.UC
.SH "NAME"
SMIME_write_PKCS7 \- convert PKCS#7 structure to S/MIME format.
.SH "LIBRARY"
libcrypto, -lcrypto
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
int SMIME_write_PKCS7(\s-1BIO\s0 *out, \s-1PKCS7\s0 *p7, \s-1BIO\s0 *data, int flags);
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISMIME_write_PKCS7()\fR adds the appropriate \s-1MIME\s0 headers to a PKCS#7
structure to produce an S/MIME message.
.PP
\&\fBout\fR is the \s-1BIO\s0 to write the data to. \fBp7\fR is the appropriate
\&\fB\s-1PKCS7\s0\fR structure. If cleartext signing (\fBmultipart/signed\fR) is
being used then the signed data must be supplied in the \fBdata\fR 
argument. \fBflags\fR is an optional set of flags.
.SH "NOTES"
.IX Header "NOTES"
The following flags can be passed in the \fBflags\fR parameter.
.PP
If \fB\s-1PKCS7_DETACHED\s0\fR is set then cleartext signing will be used,
this option only makes sense for signedData where \fB\s-1PKCS7_DETACHED\s0\fR
is also set when \fIPKCS7_sign()\fR is also called.
.PP
If the \fB\s-1PKCS7_TEXT\s0\fR flag is set \s-1MIME\s0 headers for type \fBtext/plain\fR
are added to the content, this only makes sense if \fB\s-1PKCS7_DETACHED\s0\fR
is also set.
.PP
If cleartext signing is being used then the data must be read twice:
once to compute the signature in \fIPKCS7_sign()\fR and once to output the
S/MIME message.
.SH "BUGS"
.IX Header "BUGS"
\&\fISMIME_write_PKCS7()\fR always base64 encodes PKCS#7 structures, there
should be an option to disable this.
.PP
There should really be a way to produce cleartext signing using only
a single pass of the data.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fISMIME_write_PKCS7()\fR returns 1 for success or 0 for failure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
ERR_get_error(3), PKCS7_sign(3),
PKCS7_verify(3), PKCS7_encrypt(3)
PKCS7_decrypt(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fISMIME_write_PKCS7()\fR was added to OpenSSL 0.9.5