490 lines
18 KiB
Groff
490 lines
18 KiB
Groff
.\" $NetBSD: openssl_smime.1,v 1.17 2007/11/27 22:19:54 christos Exp $
|
|
.\"
|
|
.\" Automatically generated by Pod::Man v1.37, Pod::Parser v1.3
|
|
.\"
|
|
.\" 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 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.
|
|
. \" 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 1"
|
|
.TH SMIME 1 "2006-11-24" "0.9.8e" "OpenSSL"
|
|
.SH "NAME"
|
|
smime \- S/MIME utility
|
|
.SH "LIBRARY"
|
|
libcrypto, -lcrypto
|
|
.SH "SYNOPSIS"
|
|
.IX Header "SYNOPSIS"
|
|
\&\fBopenssl\fR \fBsmime\fR
|
|
[\fB\-encrypt\fR]
|
|
[\fB\-decrypt\fR]
|
|
[\fB\-sign\fR]
|
|
[\fB\-verify\fR]
|
|
[\fB\-pk7out\fR]
|
|
[\fB\-des\fR]
|
|
[\fB\-des3\fR]
|
|
[\fB\-rc2\-40\fR]
|
|
[\fB\-rc2\-64\fR]
|
|
[\fB\-rc2\-128\fR]
|
|
[\fB\-aes128\fR]
|
|
[\fB\-aes192\fR]
|
|
[\fB\-aes256\fR]
|
|
[\fB\-camellia128\fR]
|
|
[\fB\-camellia192\fR]
|
|
[\fB\-camellia256\fR]
|
|
[\fB\-in file\fR]
|
|
[\fB\-certfile file\fR]
|
|
[\fB\-signer file\fR]
|
|
[\fB\-recip file\fR]
|
|
[\fB\-inform SMIME|PEM|DER\fR]
|
|
[\fB\-passin arg\fR]
|
|
[\fB\-inkey file\fR]
|
|
[\fB\-out file\fR]
|
|
[\fB\-outform SMIME|PEM|DER\fR]
|
|
[\fB\-content file\fR]
|
|
[\fB\-to addr\fR]
|
|
[\fB\-from ad\fR]
|
|
[\fB\-subject s\fR]
|
|
[\fB\-text\fR]
|
|
[\fB\-rand file(s)\fR]
|
|
[cert.pem]...
|
|
.SH "DESCRIPTION"
|
|
.IX Header "DESCRIPTION"
|
|
The \fBsmime\fR command handles S/MIME mail. It can encrypt, decrypt, sign and
|
|
verify S/MIME messages.
|
|
.SH "COMMAND OPTIONS"
|
|
.IX Header "COMMAND OPTIONS"
|
|
There are five operation options that set the type of operation to be performed.
|
|
The meaning of the other options varies according to the operation type.
|
|
.IP "\fB\-encrypt\fR" 4
|
|
.IX Item "-encrypt"
|
|
encrypt mail for the given recipient certificates. Input file is the message
|
|
to be encrypted. The output file is the encrypted mail in \s-1MIME\s0 format.
|
|
.IP "\fB\-decrypt\fR" 4
|
|
.IX Item "-decrypt"
|
|
decrypt mail using the supplied certificate and private key. Expects an
|
|
encrypted mail message in \s-1MIME\s0 format for the input file. The decrypted mail
|
|
is written to the output file.
|
|
.IP "\fB\-sign\fR" 4
|
|
.IX Item "-sign"
|
|
sign mail using the supplied certificate and private key. Input file is
|
|
the message to be signed. The signed message in \s-1MIME\s0 format is written
|
|
to the output file.
|
|
.IP "\fB\-verify\fR" 4
|
|
.IX Item "-verify"
|
|
verify signed mail. Expects a signed mail message on input and outputs
|
|
the signed data. Both clear text and opaque signing is supported.
|
|
.IP "\fB\-pk7out\fR" 4
|
|
.IX Item "-pk7out"
|
|
takes an input message and writes out a \s-1PEM\s0 encoded PKCS#7 structure.
|
|
.IP "\fB\-in filename\fR" 4
|
|
.IX Item "-in filename"
|
|
the input message to be encrypted or signed or the \s-1MIME\s0 message to
|
|
be decrypted or verified.
|
|
.IP "\fB\-inform SMIME|PEM|DER\fR" 4
|
|
.IX Item "-inform SMIME|PEM|DER"
|
|
this specifies the input format for the PKCS#7 structure. The default
|
|
is \fB\s-1SMIME\s0\fR which reads an S/MIME format message. \fB\s-1PEM\s0\fR and \fB\s-1DER\s0\fR
|
|
format change this to expect \s-1PEM\s0 and \s-1DER\s0 format PKCS#7 structures
|
|
instead. This currently only affects the input format of the PKCS#7
|
|
structure, if no PKCS#7 structure is being input (for example with
|
|
\&\fB\-encrypt\fR or \fB\-sign\fR) this option has no effect.
|
|
.IP "\fB\-out filename\fR" 4
|
|
.IX Item "-out filename"
|
|
the message text that has been decrypted or verified or the output \s-1MIME\s0
|
|
format message that has been signed or verified.
|
|
.IP "\fB\-outform SMIME|PEM|DER\fR" 4
|
|
.IX Item "-outform SMIME|PEM|DER"
|
|
this specifies the output format for the PKCS#7 structure. The default
|
|
is \fB\s-1SMIME\s0\fR which write an S/MIME format message. \fB\s-1PEM\s0\fR and \fB\s-1DER\s0\fR
|
|
format change this to write \s-1PEM\s0 and \s-1DER\s0 format PKCS#7 structures
|
|
instead. This currently only affects the output format of the PKCS#7
|
|
structure, if no PKCS#7 structure is being output (for example with
|
|
\&\fB\-verify\fR or \fB\-decrypt\fR) this option has no effect.
|
|
.IP "\fB\-content filename\fR" 4
|
|
.IX Item "-content filename"
|
|
This specifies a file containing the detached content, this is only
|
|
useful with the \fB\-verify\fR command. This is only usable if the PKCS#7
|
|
structure is using the detached signature form where the content is
|
|
not included. This option will override any content if the input format
|
|
is S/MIME and it uses the multipart/signed \s-1MIME\s0 content type.
|
|
.IP "\fB\-text\fR" 4
|
|
.IX Item "-text"
|
|
this option adds plain text (text/plain) \s-1MIME\s0 headers to the supplied
|
|
message if encrypting or signing. If decrypting or verifying it strips
|
|
off text headers: if the decrypted or verified message is not of \s-1MIME\s0
|
|
type text/plain then an error occurs.
|
|
.IP "\fB\-CAfile file\fR" 4
|
|
.IX Item "-CAfile file"
|
|
a file containing trusted \s-1CA\s0 certificates, only used with \fB\-verify\fR.
|
|
.IP "\fB\-CApath dir\fR" 4
|
|
.IX Item "-CApath dir"
|
|
a directory containing trusted \s-1CA\s0 certificates, only used with
|
|
\&\fB\-verify\fR. This directory must be a standard certificate directory: that
|
|
is a hash of each subject name (using \fBx509 \-hash\fR) should be linked
|
|
to each certificate.
|
|
.IP "\fB\-des \-des3 \-rc2\-40 \-rc2\-64 \-rc2\-128 \-aes128 \-aes192 \-aes256 \-camellia128 \-camellia192 \-camellia256\fR" 4
|
|
.IX Item "-des -des3 -rc2-40 -rc2-64 -rc2-128 -aes128 -aes192 -aes256 -camellia128 -camellia192 -camellia256"
|
|
the encryption algorithm to use. \s-1DES\s0 (56 bits), triple \s-1DES\s0 (168 bits),
|
|
40, 64 or 128 bit \s-1RC2\s0, 128, 192 or 256 bit \s-1AES\s0, or 128, 192 or 256 bit Camellia respectively. If not
|
|
specified 40 bit \s-1RC2\s0 is used. Only used with \fB\-encrypt\fR.
|
|
.IP "\fB\-nointern\fR" 4
|
|
.IX Item "-nointern"
|
|
when verifying a message normally certificates (if any) included in
|
|
the message are searched for the signing certificate. With this option
|
|
only the certificates specified in the \fB\-certfile\fR option are used.
|
|
The supplied certificates can still be used as untrusted CAs however.
|
|
.IP "\fB\-noverify\fR" 4
|
|
.IX Item "-noverify"
|
|
do not verify the signers certificate of a signed message.
|
|
.IP "\fB\-nochain\fR" 4
|
|
.IX Item "-nochain"
|
|
do not do chain verification of signers certificates: that is don't
|
|
use the certificates in the signed message as untrusted CAs.
|
|
.IP "\fB\-nosigs\fR" 4
|
|
.IX Item "-nosigs"
|
|
don't try to verify the signatures on the message.
|
|
.IP "\fB\-nocerts\fR" 4
|
|
.IX Item "-nocerts"
|
|
when signing a message the signer's certificate is normally included
|
|
with this option it is excluded. This will reduce the size of the
|
|
signed message but the verifier must have a copy of the signers certificate
|
|
available locally (passed using the \fB\-certfile\fR option for example).
|
|
.IP "\fB\-noattr\fR" 4
|
|
.IX Item "-noattr"
|
|
normally when a message is signed a set of attributes are included which
|
|
include the signing time and supported symmetric algorithms. With this
|
|
option they are not included.
|
|
.IP "\fB\-binary\fR" 4
|
|
.IX Item "-binary"
|
|
normally the input message is converted to \*(L"canonical\*(R" format which is
|
|
effectively using \s-1CR\s0 and \s-1LF\s0 as end of line: as required by the S/MIME
|
|
specification. When this option is present no translation occurs. This
|
|
is useful when handling binary data which may not be in \s-1MIME\s0 format.
|
|
.IP "\fB\-nodetach\fR" 4
|
|
.IX Item "-nodetach"
|
|
when signing a message use opaque signing: this form is more resistant
|
|
to translation by mail relays but it cannot be read by mail agents that
|
|
do not support S/MIME. Without this option cleartext signing with
|
|
the \s-1MIME\s0 type multipart/signed is used.
|
|
.IP "\fB\-certfile file\fR" 4
|
|
.IX Item "-certfile file"
|
|
allows additional certificates to be specified. When signing these will
|
|
be included with the message. When verifying these will be searched for
|
|
the signers certificates. The certificates should be in \s-1PEM\s0 format.
|
|
.IP "\fB\-signer file\fR" 4
|
|
.IX Item "-signer file"
|
|
the signers certificate when signing a message. If a message is
|
|
being verified then the signers certificates will be written to this
|
|
file if the verification was successful.
|
|
.IP "\fB\-recip file\fR" 4
|
|
.IX Item "-recip file"
|
|
the recipients certificate when decrypting a message. This certificate
|
|
must match one of the recipients of the message or an error occurs.
|
|
.IP "\fB\-inkey file\fR" 4
|
|
.IX Item "-inkey file"
|
|
the private key to use when signing or decrypting. This must match the
|
|
corresponding certificate. If this option is not specified then the
|
|
private key must be included in the certificate file specified with
|
|
the \fB\-recip\fR or \fB\-signer\fR file.
|
|
.IP "\fB\-passin arg\fR" 4
|
|
.IX Item "-passin arg"
|
|
the private key password source. For more information about the format of \fBarg\fR
|
|
see the \fB\s-1PASS\s0 \s-1PHRASE\s0 \s-1ARGUMENTS\s0\fR section in \fIopenssl\fR\|(1).
|
|
.IP "\fB\-rand file(s)\fR" 4
|
|
.IX Item "-rand file(s)"
|
|
a file or files containing random data used to seed the random number
|
|
generator, or an \s-1EGD\s0 socket (see \fIRAND_egd\fR\|(3)).
|
|
Multiple files can be specified separated by a OS-dependent character.
|
|
The separator is \fB;\fR for MS\-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
|
|
all others.
|
|
.IP "\fBcert.pem...\fR" 4
|
|
.IX Item "cert.pem..."
|
|
one or more certificates of message recipients: used when encrypting
|
|
a message.
|
|
.IP "\fB\-to, \-from, \-subject\fR" 4
|
|
.IX Item "-to, -from, -subject"
|
|
the relevant mail headers. These are included outside the signed
|
|
portion of a message so they may be included manually. If signing
|
|
then many S/MIME mail clients check the signers certificate's email
|
|
address matches that specified in the From: address.
|
|
.SH "NOTES"
|
|
.IX Header "NOTES"
|
|
The \s-1MIME\s0 message must be sent without any blank lines between the
|
|
headers and the output. Some mail programs will automatically add
|
|
a blank line. Piping the mail directly to sendmail is one way to
|
|
achieve the correct format.
|
|
.PP
|
|
The supplied message to be signed or encrypted must include the
|
|
necessary \s-1MIME\s0 headers or many S/MIME clients wont display it
|
|
properly (if at all). You can use the \fB\-text\fR option to automatically
|
|
add plain text headers.
|
|
.PP
|
|
A \*(L"signed and encrypted\*(R" message is one where a signed message is
|
|
then encrypted. This can be produced by encrypting an already signed
|
|
message: see the examples section.
|
|
.PP
|
|
This version of the program only allows one signer per message but it
|
|
will verify multiple signers on received messages. Some S/MIME clients
|
|
choke if a message contains multiple signers. It is possible to sign
|
|
messages \*(L"in parallel\*(R" by signing an already signed message.
|
|
.PP
|
|
The options \fB\-encrypt\fR and \fB\-decrypt\fR reflect common usage in S/MIME
|
|
clients. Strictly speaking these process PKCS#7 enveloped data: PKCS#7
|
|
encrypted data is used for other purposes.
|
|
.SH "EXIT CODES"
|
|
.IX Header "EXIT CODES"
|
|
.IP "0" 4
|
|
the operation was completely successfully.
|
|
.IP "1" 4
|
|
.IX Item "1"
|
|
an error occurred parsing the command options.
|
|
.IP "2" 4
|
|
.IX Item "2"
|
|
one of the input files could not be read.
|
|
.IP "3" 4
|
|
.IX Item "3"
|
|
an error occurred creating the PKCS#7 file or when reading the \s-1MIME\s0
|
|
message.
|
|
.IP "4" 4
|
|
.IX Item "4"
|
|
an error occurred decrypting or verifying the message.
|
|
.IP "5" 4
|
|
.IX Item "5"
|
|
the message was verified correctly but an error occurred writing out
|
|
the signers certificates.
|
|
.SH "EXAMPLES"
|
|
.IX Header "EXAMPLES"
|
|
Create a cleartext signed message:
|
|
.PP
|
|
.Vb 2
|
|
\& openssl smime -sign -in message.txt -text -out mail.msg \e
|
|
\& -signer mycert.pem
|
|
.Ve
|
|
.PP
|
|
Create and opaque signed message
|
|
.PP
|
|
.Vb 2
|
|
\& openssl smime -sign -in message.txt -text -out mail.msg -nodetach \e
|
|
\& -signer mycert.pem
|
|
.Ve
|
|
.PP
|
|
Create a signed message, include some additional certificates and
|
|
read the private key from another file:
|
|
.PP
|
|
.Vb 2
|
|
\& openssl smime -sign -in in.txt -text -out mail.msg \e
|
|
\& -signer mycert.pem -inkey mykey.pem -certfile mycerts.pem
|
|
.Ve
|
|
.PP
|
|
Send a signed message under Unix directly to sendmail, including headers:
|
|
.PP
|
|
.Vb 3
|
|
\& openssl smime -sign -in in.txt -text -signer mycert.pem \e
|
|
\& -from steve@openssl.org -to someone@somewhere \e
|
|
\& -subject "Signed message" | sendmail someone@somewhere
|
|
.Ve
|
|
.PP
|
|
Verify a message and extract the signer's certificate if successful:
|
|
.PP
|
|
.Vb 1
|
|
\& openssl smime -verify -in mail.msg -signer user.pem -out signedtext.txt
|
|
.Ve
|
|
.PP
|
|
Send encrypted mail using triple \s-1DES:\s0
|
|
.PP
|
|
.Vb 3
|
|
\& openssl smime -encrypt -in in.txt -from steve@openssl.org \e
|
|
\& -to someone@somewhere -subject "Encrypted message" \e
|
|
\& -des3 user.pem -out mail.msg
|
|
.Ve
|
|
.PP
|
|
Sign and encrypt mail:
|
|
.PP
|
|
.Vb 4
|
|
\& openssl smime -sign -in ml.txt -signer my.pem -text \e
|
|
\& | openssl smime -encrypt -out mail.msg \e
|
|
\& -from steve@openssl.org -to someone@somewhere \e
|
|
\& -subject "Signed and Encrypted message" -des3 user.pem
|
|
.Ve
|
|
.PP
|
|
Note: the encryption command does not include the \fB\-text\fR option because the message
|
|
being encrypted already has \s-1MIME\s0 headers.
|
|
.PP
|
|
Decrypt mail:
|
|
.PP
|
|
.Vb 1
|
|
\& openssl smime -decrypt -in mail.msg -recip mycert.pem -inkey key.pem
|
|
.Ve
|
|
.PP
|
|
The output from Netscape form signing is a PKCS#7 structure with the
|
|
detached signature format. You can use this program to verify the
|
|
signature by line wrapping the base64 encoded structure and surrounding
|
|
it with:
|
|
.PP
|
|
.Vb 2
|
|
\& -----BEGIN PKCS7-----
|
|
\& -----END PKCS7-----
|
|
.Ve
|
|
.PP
|
|
and using the command,
|
|
.PP
|
|
.Vb 1
|
|
\& openssl smime -verify -inform PEM -in signature.pem -content content.txt
|
|
.Ve
|
|
.PP
|
|
alternatively you can base64 decode the signature and use
|
|
.PP
|
|
.Vb 1
|
|
\& openssl smime -verify -inform DER -in signature.der -content content.txt
|
|
.Ve
|
|
.PP
|
|
Create an encrypted message using 128 bit Camellia:
|
|
.PP
|
|
.Vb 1
|
|
\& openssl smime -encrypt -in plain.txt -camellia128 -out mail.msg cert.pem
|
|
.Ve
|
|
.SH "BUGS"
|
|
.IX Header "BUGS"
|
|
The \s-1MIME\s0 parser isn't very clever: it seems to handle most messages that I've thrown
|
|
at it but it may choke on others.
|
|
.PP
|
|
The code currently will only write out the signer's certificate to a file: if the
|
|
signer has a separate encryption certificate this must be manually extracted. There
|
|
should be some heuristic that determines the correct encryption certificate.
|
|
.PP
|
|
Ideally a database should be maintained of a certificates for each email address.
|
|
.PP
|
|
The code doesn't currently take note of the permitted symmetric encryption
|
|
algorithms as supplied in the SMIMECapabilities signed attribute. this means the
|
|
user has to manually include the correct encryption algorithm. It should store
|
|
the list of permitted ciphers in a database and only use those.
|
|
.PP
|
|
No revocation checking is done on the signer's certificate.
|
|
.PP
|
|
The current code can only handle S/MIME v2 messages, the more complex S/MIME v3
|
|
structures may cause parsing errors.
|