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authorJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
committerJacob McDonnell <jacob@jacobmcdonnell.com>2026-04-25 19:55:15 -0400
commit253e67c8b3a72b3a4757fdbc5845297628db0a4a (patch)
treeadf53b66087aa30dfbf8bf391a1dadb044c3bf4d /static/netbsd/man1/openssl_cms.1
parenta9157ce950dfe2fc30795d43b9d79b9d1bffc48b (diff)
docs: Added All NetBSD Manuals
Diffstat (limited to 'static/netbsd/man1/openssl_cms.1')
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+.\" $NetBSD: openssl_cms.1,v 1.1.1.2 2023/04/18 14:19:15 christos Exp $
+.\"
+.\" 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 "CMS 1"
+.TH CMS 1 "2019-03-12" "1.1.1i" "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"
+openssl\-cms,
+cms \- CMS utility
+.SH "LIBRARY"
+libcrypto, -lcrypto
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBopenssl\fR \fBcms\fR
+[\fB\-help\fR]
+[\fB\-encrypt\fR]
+[\fB\-decrypt\fR]
+[\fB\-sign\fR]
+[\fB\-verify\fR]
+[\fB\-cmsout\fR]
+[\fB\-resign\fR]
+[\fB\-data_create\fR]
+[\fB\-data_out\fR]
+[\fB\-digest_create\fR]
+[\fB\-digest_verify\fR]
+[\fB\-compress\fR]
+[\fB\-uncompress\fR]
+[\fB\-EncryptedData_encrypt\fR]
+[\fB\-sign_receipt\fR]
+[\fB\-verify_receipt receipt\fR]
+[\fB\-in filename\fR]
+[\fB\-inform SMIME|PEM|DER\fR]
+[\fB\-rctform SMIME|PEM|DER\fR]
+[\fB\-out filename\fR]
+[\fB\-outform SMIME|PEM|DER\fR]
+[\fB\-stream \-indef \-noindef\fR]
+[\fB\-noindef\fR]
+[\fB\-content filename\fR]
+[\fB\-text\fR]
+[\fB\-noout\fR]
+[\fB\-print\fR]
+[\fB\-CAfile file\fR]
+[\fB\-CApath dir\fR]
+[\fB\-no\-CAfile\fR]
+[\fB\-no\-CApath\fR]
+[\fB\-attime timestamp\fR]
+[\fB\-check_ss_sig\fR]
+[\fB\-crl_check\fR]
+[\fB\-crl_check_all\fR]
+[\fB\-explicit_policy\fR]
+[\fB\-extended_crl\fR]
+[\fB\-ignore_critical\fR]
+[\fB\-inhibit_any\fR]
+[\fB\-inhibit_map\fR]
+[\fB\-no_check_time\fR]
+[\fB\-partial_chain\fR]
+[\fB\-policy arg\fR]
+[\fB\-policy_check\fR]
+[\fB\-policy_print\fR]
+[\fB\-purpose purpose\fR]
+[\fB\-suiteB_128\fR]
+[\fB\-suiteB_128_only\fR]
+[\fB\-suiteB_192\fR]
+[\fB\-trusted_first\fR]
+[\fB\-no_alt_chains\fR]
+[\fB\-use_deltas\fR]
+[\fB\-auth_level num\fR]
+[\fB\-verify_depth num\fR]
+[\fB\-verify_email email\fR]
+[\fB\-verify_hostname hostname\fR]
+[\fB\-verify_ip ip\fR]
+[\fB\-verify_name name\fR]
+[\fB\-x509_strict\fR]
+[\fB\-md digest\fR]
+[\fB\-\f(BIcipher\fB\fR]
+[\fB\-nointern\fR]
+[\fB\-noverify\fR]
+[\fB\-nocerts\fR]
+[\fB\-noattr\fR]
+[\fB\-nosmimecap\fR]
+[\fB\-binary\fR]
+[\fB\-crlfeol\fR]
+[\fB\-asciicrlf\fR]
+[\fB\-nodetach\fR]
+[\fB\-certfile file\fR]
+[\fB\-certsout file\fR]
+[\fB\-signer file\fR]
+[\fB\-recip file\fR]
+[\fB\-keyid\fR]
+[\fB\-receipt_request_all\fR]
+[\fB\-receipt_request_first\fR]
+[\fB\-receipt_request_from emailaddress\fR]
+[\fB\-receipt_request_to emailaddress\fR]
+[\fB\-receipt_request_print\fR]
+[\fB\-secretkey key\fR]
+[\fB\-secretkeyid id\fR]
+[\fB\-econtent_type type\fR]
+[\fB\-inkey file\fR]
+[\fB\-keyopt name:parameter\fR]
+[\fB\-passin arg\fR]
+[\fB\-rand file...\fR]
+[\fB\-writerand file\fR]
+[\fBcert.pem...\fR]
+[\fB\-to addr\fR]
+[\fB\-from addr\fR]
+[\fB\-subject subj\fR]
+[cert.pem]...
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+The \fBcms\fR command handles S/MIME v3.1 mail. It can encrypt, decrypt, sign and
+verify, compress and uncompress S/MIME messages.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+There are fourteen 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\-help\fR" 4
+.IX Item "-help"
+Print out a usage message.
+.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. The
+actual \s-1CMS\s0 type is <B>EnvelopedData<B>.
+.Sp
+Note that no revocation check is done for the recipient cert, so if that
+key has been compromised, others may be able to decrypt the text.
+.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\-debug_decrypt\fR" 4
+.IX Item "-debug_decrypt"
+This option sets the \fB\s-1CMS_DEBUG_DECRYPT\s0\fR flag. This option should be used
+with caution: see the notes section below.
+.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\-cmsout\fR" 4
+.IX Item "-cmsout"
+Takes an input message and writes out a \s-1PEM\s0 encoded \s-1CMS\s0 structure.
+.IP "\fB\-resign\fR" 4
+.IX Item "-resign"
+Resign a message: take an existing message and one or more new signers.
+.IP "\fB\-data_create\fR" 4
+.IX Item "-data_create"
+Create a \s-1CMS\s0 \fBData\fR type.
+.IP "\fB\-data_out\fR" 4
+.IX Item "-data_out"
+\&\fBData\fR type and output the content.
+.IP "\fB\-digest_create\fR" 4
+.IX Item "-digest_create"
+Create a \s-1CMS\s0 \fBDigestedData\fR type.
+.IP "\fB\-digest_verify\fR" 4
+.IX Item "-digest_verify"
+Verify a \s-1CMS\s0 \fBDigestedData\fR type and output the content.
+.IP "\fB\-compress\fR" 4
+.IX Item "-compress"
+Create a \s-1CMS\s0 \fBCompressedData\fR type. OpenSSL must be compiled with \fBzlib\fR
+support for this option to work, otherwise it will output an error.
+.IP "\fB\-uncompress\fR" 4
+.IX Item "-uncompress"
+Uncompress a \s-1CMS\s0 \fBCompressedData\fR type and output the content. OpenSSL must be
+compiled with \fBzlib\fR support for this option to work, otherwise it will
+output an error.
+.IP "\fB\-EncryptedData_encrypt\fR" 4
+.IX Item "-EncryptedData_encrypt"
+Encrypt content using supplied symmetric key and algorithm using a \s-1CMS\s0
+\&\fBEncryptedData\fR type and output the content.
+.IP "\fB\-sign_receipt\fR" 4
+.IX Item "-sign_receipt"
+Generate and output a signed receipt for the supplied message. The input
+message \fBmust\fR contain a signed receipt request. Functionality is otherwise
+similar to the \fB\-sign\fR operation.
+.IP "\fB\-verify_receipt receipt\fR" 4
+.IX Item "-verify_receipt receipt"
+Verify a signed receipt in filename \fBreceipt\fR. The input message \fBmust\fR
+contain the original receipt request. Functionality is otherwise similar
+to the \fB\-verify\fR operation.
+.IP "\fB\-in filename\fR" 4
+.IX Item "-in filename"
+The input message to be encrypted or signed or the 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 \s-1CMS\s0 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 \s-1CMS\s0 structures
+instead. This currently only affects the input format of the \s-1CMS\s0
+structure, if no \s-1CMS\s0 structure is being input (for example with
+\&\fB\-encrypt\fR or \fB\-sign\fR) this option has no effect.
+.IP "\fB\-rctform SMIME|PEM|DER\fR" 4
+.IX Item "-rctform SMIME|PEM|DER"
+Specify the format for a signed receipt for use with the \fB\-receipt_verify\fR
+operation.
+.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 \s-1CMS\s0 structure. The default
+is \fB\s-1SMIME\s0\fR which writes 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 \s-1CMS\s0 structures
+instead. This currently only affects the output format of the \s-1CMS\s0
+structure, if no \s-1CMS\s0 structure is being output (for example with
+\&\fB\-verify\fR or \fB\-decrypt\fR) this option has no effect.
+.IP "\fB\-stream \-indef \-noindef\fR" 4
+.IX Item "-stream -indef -noindef"
+The \fB\-stream\fR and \fB\-indef\fR options are equivalent and enable streaming I/O
+for encoding operations. This permits single pass processing of data without
+the need to hold the entire contents in memory, potentially supporting very
+large files. Streaming is automatically set for S/MIME signing with detached
+data if the output format is \fB\s-1SMIME\s0\fR it is currently off by default for all
+other operations.
+.IP "\fB\-noindef\fR" 4
+.IX Item "-noindef"
+Disable streaming I/O where it would produce and indefinite length constructed
+encoding. This option currently has no effect. In future streaming will be
+enabled by default on all relevant operations and this option will disable it.
+.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 \s-1CMS\s0
+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\-noout\fR" 4
+.IX Item "-noout"
+For the \fB\-cmsout\fR operation do not output the parsed \s-1CMS\s0 structure. This
+is useful when combined with the \fB\-print\fR option or if the syntax of the \s-1CMS\s0
+structure is being checked.
+.IP "\fB\-print\fR" 4
+.IX Item "-print"
+For the \fB\-cmsout\fR operation print out all fields of the \s-1CMS\s0 structure. This
+is mainly useful for testing purposes.
+.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\-no\-CAfile\fR" 4
+.IX Item "-no-CAfile"
+Do not load the trusted \s-1CA\s0 certificates from the default file location
+.IP "\fB\-no\-CApath\fR" 4
+.IX Item "-no-CApath"
+Do not load the trusted \s-1CA\s0 certificates from the default directory location
+.IP "\fB\-md digest\fR" 4
+.IX Item "-md digest"
+Digest algorithm to use when signing or resigning. If not present then the
+default digest algorithm for the signing key will be used (usually \s-1SHA1\s0).
+.IP "\fB\-\f(BIcipher\fB\fR" 4
+.IX Item "-cipher"
+The encryption algorithm to use. For example triple \s-1DES\s0 (168 bits) \- \fB\-des3\fR
+or 256 bit \s-1AES\s0 \- \fB\-aes256\fR. Any standard algorithm name (as used by the
+\&\fBEVP_get_cipherbyname()\fR function) can also be used preceded by a dash, for
+example \fB\-aes\-128\-cbc\fR. See \fBenc\fR\|(1) for a list of ciphers
+supported by your version of OpenSSL.
+.Sp
+If not specified triple \s-1DES\s0 is used. Only used with \fB\-encrypt\fR and
+\&\fB\-EncryptedData_create\fR commands.
+.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\-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\-nosmimecap\fR" 4
+.IX Item "-nosmimecap"
+Exclude the list of supported algorithms from signed attributes, other options
+such as signing time and content type are still 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\-crlfeol\fR" 4
+.IX Item "-crlfeol"
+Normally the output file uses a single \fB\s-1LF\s0\fR as end of line. When this
+option is present \fB\s-1CRLF\s0\fR is used instead.
+.IP "\fB\-asciicrlf\fR" 4
+.IX Item "-asciicrlf"
+When signing use \s-1ASCII CRLF\s0 format canonicalisation. This strips trailing
+whitespace from all lines, deletes trailing blank lines at \s-1EOF\s0 and sets
+the encapsulated content type. This option is normally used with detached
+content and an output signature format of \s-1DER.\s0 This option is not normally
+needed when verifying as it is enabled automatically if the encapsulated
+content format is detected.
+.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\-certsout file\fR" 4
+.IX Item "-certsout file"
+Any certificates contained in the message are written to \fBfile\fR.
+.IP "\fB\-signer file\fR" 4
+.IX Item "-signer file"
+A signing certificate when signing or resigning a message, this option can be
+used multiple times if more than one signer is required. 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"
+When decrypting a message this specifies the recipients certificate. The
+certificate must match one of the recipients of the message or an error
+occurs.
+.Sp
+When encrypting a message this option may be used multiple times to specify
+each recipient. This form \fBmust\fR be used if customised parameters are
+required (for example to specify RSA-OAEP).
+.Sp
+Only certificates carrying \s-1RSA,\s0 Diffie-Hellman or \s-1EC\s0 keys are supported by this
+option.
+.IP "\fB\-keyid\fR" 4
+.IX Item "-keyid"
+Use subject key identifier to identify certificates instead of issuer name and
+serial number. The supplied certificate \fBmust\fR include a subject key
+identifier extension. Supported by \fB\-sign\fR and \fB\-encrypt\fR options.
+.IP "\fB\-receipt_request_all\fR, \fB\-receipt_request_first\fR" 4
+.IX Item "-receipt_request_all, -receipt_request_first"
+For \fB\-sign\fR option include a signed receipt request. Indicate requests should
+be provided by all recipient or first tier recipients (those mailed directly
+and not from a mailing list). Ignored it \fB\-receipt_request_from\fR is included.
+.IP "\fB\-receipt_request_from emailaddress\fR" 4
+.IX Item "-receipt_request_from emailaddress"
+For \fB\-sign\fR option include a signed receipt request. Add an explicit email
+address where receipts should be supplied.
+.IP "\fB\-receipt_request_to emailaddress\fR" 4
+.IX Item "-receipt_request_to emailaddress"
+Add an explicit email address where signed receipts should be sent to. This
+option \fBmust\fR but supplied if a signed receipt it requested.
+.IP "\fB\-receipt_request_print\fR" 4
+.IX Item "-receipt_request_print"
+For the \fB\-verify\fR operation print out the contents of any signed receipt
+requests.
+.IP "\fB\-secretkey key\fR" 4
+.IX Item "-secretkey key"
+Specify symmetric key to use. The key must be supplied in hex format and be
+consistent with the algorithm used. Supported by the \fB\-EncryptedData_encrypt\fR
+\&\fB\-EncryptedData_decrypt\fR, \fB\-encrypt\fR and \fB\-decrypt\fR options. When used
+with \fB\-encrypt\fR or \fB\-decrypt\fR the supplied key is used to wrap or unwrap the
+content encryption key using an \s-1AES\s0 key in the \fBKEKRecipientInfo\fR type.
+.IP "\fB\-secretkeyid id\fR" 4
+.IX Item "-secretkeyid id"
+The key identifier for the supplied symmetric key for \fBKEKRecipientInfo\fR type.
+This option \fBmust\fR be present if the \fB\-secretkey\fR option is used with
+\&\fB\-encrypt\fR. With \fB\-decrypt\fR operations the \fBid\fR is used to locate the
+relevant key if it is not supplied then an attempt is used to decrypt any
+\&\fBKEKRecipientInfo\fR structures.
+.IP "\fB\-econtent_type type\fR" 4
+.IX Item "-econtent_type type"
+Set the encapsulated content type to \fBtype\fR if not supplied the \fBData\fR type
+is used. The \fBtype\fR argument can be any valid \s-1OID\s0 name in either text or
+numerical format.
+.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. When signing this option can be used
+multiple times to specify successive keys.
+.IP "\fB\-keyopt name:opt\fR" 4
+.IX Item "-keyopt name:opt"
+For signing and encryption this option can be used multiple times to
+set customised parameters for the preceding key or certificate. It can
+currently be used to set RSA-PSS for signing, RSA-OAEP for encryption
+or to modify default parameters for \s-1ECDH.\s0
+.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 PHRASE ARGUMENTS\s0\fR section in \fBopenssl\fR\|(1).
+.IP "\fB\-rand file...\fR" 4
+.IX Item "-rand file..."
+A file or files containing random data used to seed the random number
+generator.
+Multiple files can be specified separated by an OS-dependent character.
+The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
+all others.
+.IP "[\fB\-writerand file\fR]" 4
+.IX Item "[-writerand file]"
+Writes random data to the specified \fIfile\fR upon exit.
+This can be used with a subsequent \fB\-rand\fR flag.
+.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.
+.IP "\fB\-attime\fR, \fB\-check_ss_sig\fR, \fB\-crl_check\fR, \fB\-crl_check_all\fR, \fB\-explicit_policy\fR, \fB\-extended_crl\fR, \fB\-ignore_critical\fR, \fB\-inhibit_any\fR, \fB\-inhibit_map\fR, \fB\-no_alt_chains\fR, \fB\-no_check_time\fR, \fB\-partial_chain\fR, \fB\-policy\fR, \fB\-policy_check\fR, \fB\-policy_print\fR, \fB\-purpose\fR, \fB\-suiteB_128\fR, \fB\-suiteB_128_only\fR, \fB\-suiteB_192\fR, \fB\-trusted_first\fR, \fB\-use_deltas\fR, \fB\-auth_level\fR, \fB\-verify_depth\fR, \fB\-verify_email\fR, \fB\-verify_hostname\fR, \fB\-verify_ip\fR, \fB\-verify_name\fR, \fB\-x509_strict\fR" 4
+.IX Item "-attime, -check_ss_sig, -crl_check, -crl_check_all, -explicit_policy, -extended_crl, -ignore_critical, -inhibit_any, -inhibit_map, -no_alt_chains, -no_check_time, -partial_chain, -policy, -policy_check, -policy_print, -purpose, -suiteB_128, -suiteB_128_only, -suiteB_192, -trusted_first, -use_deltas, -auth_level, -verify_depth, -verify_email, -verify_hostname, -verify_ip, -verify_name, -x509_strict"
+Set various certificate chain validation options. See the
+\&\fBverify\fR\|(1) manual page for details.
+.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 won't 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 \s-1CMS\s0 enveloped data: \s-1CMS\s0
+encrypted data is used for other purposes.
+.PP
+The \fB\-resign\fR option uses an existing message digest when adding a new
+signer. This means that attributes must be present in at least one existing
+signer using the same message digest or this operation will fail.
+.PP
+The \fB\-stream\fR and \fB\-indef\fR options enable streaming I/O support.
+As a result the encoding is \s-1BER\s0 using indefinite length constructed encoding
+and no longer \s-1DER.\s0 Streaming is supported for the \fB\-encrypt\fR operation and the
+\&\fB\-sign\fR operation if the content is not detached.
+.PP
+Streaming is always used for the \fB\-sign\fR operation with detached data but
+since the content is no longer part of the \s-1CMS\s0 structure the encoding
+remains \s-1DER.\s0
+.PP
+If the \fB\-decrypt\fR option is used without a recipient certificate then an
+attempt is made to locate the recipient by trying each potential recipient
+in turn using the supplied private key. To thwart the \s-1MMA\s0 attack
+(Bleichenbacher's attack on \s-1PKCS\s0 #1 v1.5 \s-1RSA\s0 padding) all recipients are
+tried whether they succeed or not and if no recipients match the message
+is \*(L"decrypted\*(R" using a random key which will typically output garbage.
+The \fB\-debug_decrypt\fR option can be used to disable the \s-1MMA\s0 attack protection
+and return an error if no recipient can be found: this option should be used
+with caution. For a fuller description see \fBCMS_decrypt\fR\|(3)).
+.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 \s-1CMS\s0 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 "COMPATIBILITY WITH PKCS#7 format."
+.IX Header "COMPATIBILITY WITH PKCS#7 format."
+The \fBsmime\fR utility can only process the older \fBPKCS#7\fR format. The \fBcms\fR
+utility supports Cryptographic Message Syntax format. Use of some features
+will result in messages which cannot be processed by applications which only
+support the older format. These are detailed below.
+.PP
+The use of the \fB\-keyid\fR option with \fB\-sign\fR or \fB\-encrypt\fR.
+.PP
+The \fB\-outform \s-1PEM\s0\fR option uses different headers.
+.PP
+The \fB\-compress\fR option.
+.PP
+The \fB\-secretkey\fR option when used with \fB\-encrypt\fR.
+.PP
+The use of \s-1PSS\s0 with \fB\-sign\fR.
+.PP
+The use of \s-1OAEP\s0 or non-RSA keys with \fB\-encrypt\fR.
+.PP
+Additionally the \fB\-EncryptedData_create\fR and \fB\-data_create\fR type cannot
+be processed by the older \fBsmime\fR command.
+.SH "EXAMPLES"
+.IX Header "EXAMPLES"
+Create a cleartext signed message:
+.PP
+.Vb 2
+\& openssl cms \-sign \-in message.txt \-text \-out mail.msg \e
+\& \-signer mycert.pem
+.Ve
+.PP
+Create an opaque signed message
+.PP
+.Vb 2
+\& openssl cms \-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 cms \-sign \-in in.txt \-text \-out mail.msg \e
+\& \-signer mycert.pem \-inkey mykey.pem \-certfile mycerts.pem
+.Ve
+.PP
+Create a signed message with two signers, use key identifier:
+.PP
+.Vb 2
+\& openssl cms \-sign \-in message.txt \-text \-out mail.msg \e
+\& \-signer mycert.pem \-signer othercert.pem \-keyid
+.Ve
+.PP
+Send a signed message under Unix directly to sendmail, including headers:
+.PP
+.Vb 3
+\& openssl cms \-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 cms \-verify \-in mail.msg \-signer user.pem \-out signedtext.txt
+.Ve
+.PP
+Send encrypted mail using triple \s-1DES:\s0
+.PP
+.Vb 3
+\& openssl cms \-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 cms \-sign \-in ml.txt \-signer my.pem \-text \e
+\& | openssl cms \-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 cms \-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 cms \-verify \-inform PEM \-in signature.pem \-content content.txt
+.Ve
+.PP
+alternatively you can base64 decode the signature and use
+.PP
+.Vb 1
+\& openssl cms \-verify \-inform DER \-in signature.der \-content content.txt
+.Ve
+.PP
+Create an encrypted message using 128 bit Camellia:
+.PP
+.Vb 1
+\& openssl cms \-encrypt \-in plain.txt \-camellia128 \-out mail.msg cert.pem
+.Ve
+.PP
+Add a signer to an existing message:
+.PP
+.Vb 1
+\& openssl cms \-resign \-in mail.msg \-signer newsign.pem \-out mail2.msg
+.Ve
+.PP
+Sign mail using RSA-PSS:
+.PP
+.Vb 2
+\& openssl cms \-sign \-in message.txt \-text \-out mail.msg \e
+\& \-signer mycert.pem \-keyopt rsa_padding_mode:pss
+.Ve
+.PP
+Create encrypted mail using RSA-OAEP:
+.PP
+.Vb 2
+\& openssl cms \-encrypt \-in plain.txt \-out mail.msg \e
+\& \-recip cert.pem \-keyopt rsa_padding_mode:oaep
+.Ve
+.PP
+Use \s-1SHA256 KDF\s0 with an \s-1ECDH\s0 certificate:
+.PP
+.Vb 2
+\& openssl cms \-encrypt \-in plain.txt \-out mail.msg \e
+\& \-recip ecdhcert.pem \-keyopt ecdh_kdf_md:sha256
+.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.
+.SH "HISTORY"
+.IX Header "HISTORY"
+The use of multiple \fB\-signer\fR options and the \fB\-resign\fR command were first
+added in OpenSSL 1.0.0.
+.PP
+The \fBkeyopt\fR option was added in OpenSSL 1.0.2.
+.PP
+Support for RSA-OAEP and RSA-PSS was added in OpenSSL 1.0.2.
+.PP
+The use of non-RSA keys with \fB\-encrypt\fR and \fB\-decrypt\fR
+was added in OpenSSL 1.0.2.
+.PP
+The \-no_alt_chains option was added in OpenSSL 1.0.2b.
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2008\-2018 The OpenSSL Project Authors. All Rights Reserved.
+.PP
+Licensed under the OpenSSL license (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>.