857 lines
34 KiB
Groff
Executable File
857 lines
34 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
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.rm #[ #] #H #V #F C
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.\" ========================================================================
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.\"
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.IX Title "OPENSSL-CMS 1"
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.TH OPENSSL-CMS 1 "2020-03-02" "3.0.0-dev" "OpenSSL"
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.\" For nroff, turn off justification. Always turn off hyphenation; it makes
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.\" way too many mistakes in technical documents.
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.if n .ad l
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.nh
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.SH "NAME"
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openssl\-cms \- CMS utility
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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\&\fBopenssl\fR \fBcms\fR
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[\fB\-help\fR]
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[\fB\-encrypt\fR]
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[\fB\-decrypt\fR]
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[\fB\-debug_decrypt\fR]
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[\fB\-sign\fR]
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[\fB\-verify\fR]
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[\fB\-verify_retcode\fR]
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[\fB\-no_attr_verify\fR]
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[\fB\-nosigs\fR]
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[\fB\-no_content_verify\fR]
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[\fB\-cmsout\fR]
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[\fB\-resign\fR]
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[\fB\-cades\fR]
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[\fB\-data_create\fR]
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[\fB\-data_out\fR]
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[\fB\-digest_create\fR]
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[\fB\-digest_verify\fR]
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[\fB\-compress\fR]
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[\fB\-uncompress\fR]
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[\fB\-EncryptedData_decrypt\fR]
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[\fB\-EncryptedData_encrypt\fR]
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[\fB\-sign_receipt\fR]
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[\fB\-verify_receipt\fR \fIreceipt\fR]
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[\fB\-in\fR \fIfilename\fR]
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[\fB\-out\fR \fIfilename\fR]
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[\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR]
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[\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR]
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[\fB\-rctform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR]
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[\fB\-keyform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1ENGINE\s0\fR]
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[\fB\-stream\fR]
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[\fB\-indef\fR]
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[\fB\-noindef\fR]
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[\fB\-content\fR \fIfilename\fR]
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[\fB\-text\fR]
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[\fB\-noout\fR]
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[\fB\-print\fR]
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[\fB\-md\fR \fIdigest\fR]
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[\fB\-\f(BIcipher\fB\fR]
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[\fB\-nointern\fR]
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[\fB\-noverify\fR]
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[\fB\-nocerts\fR]
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[\fB\-noattr\fR]
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[\fB\-nosmimecap\fR]
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[\fB\-binary\fR]
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[\fB\-crlfeol\fR]
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[\fB\-asciicrlf\fR]
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[\fB\-nodetach\fR]
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[\fB\-certfile\fR \fIfile\fR]
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[\fB\-certsout\fR \fIfile\fR]
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[\fB\-signer\fR \fIfile\fR]
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[\fB\-recip\fR \fIfile\fR]
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[\fB\-keyid\fR]
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[\fB\-receipt_request_all\fR]
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[\fB\-receipt_request_first\fR]
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[\fB\-receipt_request_from\fR \fIemailaddress\fR]
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[\fB\-receipt_request_to\fR \fIemailaddress\fR]
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[\fB\-receipt_request_print\fR]
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[\fB\-pwri_password\fR \fIpassword\fR]
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[\fB\-secretkey\fR \fIkey\fR]
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[\fB\-secretkeyid\fR \fIid\fR]
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[\fB\-econtent_type\fR \fItype\fR]
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[\fB\-inkey\fR \fIfile\fR]
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[\fB\-keyopt\fR \fIname\fR:\fIparameter\fR]
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[\fB\-passin\fR \fIarg\fR]
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[\fB\-to\fR \fIaddr\fR]
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[\fB\-from\fR \fIaddr\fR]
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[\fB\-subject\fR \fIsubj\fR]
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[\fB\-allow_proxy_certs\fR]
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[\fB\-attime\fR \fItimestamp\fR]
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[\fB\-no_check_time\fR]
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[\fB\-check_ss_sig\fR]
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[\fB\-crl_check\fR]
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[\fB\-crl_check_all\fR]
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[\fB\-explicit_policy\fR]
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[\fB\-extended_crl\fR]
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[\fB\-ignore_critical\fR]
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[\fB\-inhibit_any\fR]
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[\fB\-inhibit_map\fR]
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[\fB\-partial_chain\fR]
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[\fB\-policy\fR \fIarg\fR]
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[\fB\-policy_check\fR]
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[\fB\-policy_print\fR]
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[\fB\-purpose\fR \fIpurpose\fR]
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[\fB\-suiteB_128\fR]
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[\fB\-suiteB_128_only\fR]
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[\fB\-suiteB_192\fR]
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[\fB\-trusted_first\fR]
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[\fB\-no_alt_chains\fR]
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[\fB\-use_deltas\fR]
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[\fB\-auth_level\fR \fInum\fR]
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[\fB\-verify_depth\fR \fInum\fR]
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[\fB\-verify_email\fR \fIemail\fR]
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[\fB\-verify_hostname\fR \fIhostname\fR]
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[\fB\-verify_ip\fR \fIip\fR]
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[\fB\-verify_name\fR \fIname\fR]
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[\fB\-x509_strict\fR]
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[\fB\-issuer_checks\fR]
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.PP
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[\fB\-CAfile\fR \fIfile\fR]
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[\fB\-no\-CAfile\fR]
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[\fB\-CApath\fR \fIdir\fR]
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[\fB\-no\-CApath\fR]
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[\fB\-CAstore\fR \fIuri\fR]
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[\fB\-no\-CAstore\fR]
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[\fB\-rand\fR \fIfiles\fR]
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[\fB\-writerand\fR \fIfile\fR]
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[\fB\-engine\fR \fIid\fR]
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[\fIcert.pem\fR ...]
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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This command handles S/MIME v3.1 mail. It can encrypt, decrypt,
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sign and verify, compress and uncompress S/MIME messages.
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.SH "OPTIONS"
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.IX Header "OPTIONS"
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There are fourteen operation options that set the type of operation to be
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performed. The meaning of the other options varies according to the operation
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type.
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.IP "\fB\-help\fR" 4
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.IX Item "-help"
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Print out a usage message.
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.IP "\fB\-encrypt\fR" 4
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.IX Item "-encrypt"
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Encrypt mail for the given recipient certificates. Input file is the message
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to be encrypted. The output file is the encrypted mail in \s-1MIME\s0 format. The
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actual \s-1CMS\s0 type is <B>EnvelopedData<B>.
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.Sp
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Note that no revocation check is done for the recipient cert, so if that
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key has been compromised, others may be able to decrypt the text.
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.IP "\fB\-decrypt\fR" 4
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.IX Item "-decrypt"
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Decrypt mail using the supplied certificate and private key. Expects an
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encrypted mail message in \s-1MIME\s0 format for the input file. The decrypted mail
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is written to the output file.
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.IP "\fB\-debug_decrypt\fR" 4
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.IX Item "-debug_decrypt"
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This option sets the \fB\s-1CMS_DEBUG_DECRYPT\s0\fR flag. This option should be used
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with caution: see the notes section below.
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.IP "\fB\-sign\fR" 4
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.IX Item "-sign"
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Sign mail using the supplied certificate and private key. Input file is
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the message to be signed. The signed message in \s-1MIME\s0 format is written
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to the output file.
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.IP "\fB\-verify\fR" 4
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.IX Item "-verify"
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Verify signed mail. Expects a signed mail message on input and outputs
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the signed data. Both clear text and opaque signing is supported.
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.IP "\fB\-verify_retcode\fR" 4
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.IX Item "-verify_retcode"
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Exit nonzero on verification failure.
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.IP "\fB\-no_attr_verify\fR" 4
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.IX Item "-no_attr_verify"
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Do not verify signed attribute signatures.
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.IP "\fB\-no_content_verify\fR" 4
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.IX Item "-no_content_verify"
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Do not verify signed content signatures.
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.IP "\fB\-nosigs\fR" 4
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.IX Item "-nosigs"
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Don't verify message signature.
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.IP "\fB\-cmsout\fR" 4
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.IX Item "-cmsout"
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Takes an input message and writes out a \s-1PEM\s0 encoded \s-1CMS\s0 structure.
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.IP "\fB\-resign\fR" 4
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.IX Item "-resign"
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Resign a message: take an existing message and one or more new signers.
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.IP "\fB\-cades\fR" 4
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.IX Item "-cades"
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Add an \s-1ESS\s0 signing-certificate or \s-1ESS\s0 signing\-certificate\-v2 signed-attribute to the SignerInfo, in order to make
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the signature comply with the requirements for a CAdES Basic Electronic Signature (CAdES-BES). See the \s-1NOTES\s0
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section for more details.
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.IP "\fB\-data_create\fR" 4
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.IX Item "-data_create"
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Create a \s-1CMS\s0 \fBData\fR type.
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.IP "\fB\-data_out\fR" 4
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.IX Item "-data_out"
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\&\fBData\fR type and output the content.
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.IP "\fB\-digest_create\fR" 4
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.IX Item "-digest_create"
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Create a \s-1CMS\s0 \fBDigestedData\fR type.
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.IP "\fB\-digest_verify\fR" 4
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.IX Item "-digest_verify"
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Verify a \s-1CMS\s0 \fBDigestedData\fR type and output the content.
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.IP "\fB\-compress\fR" 4
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.IX Item "-compress"
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Create a \s-1CMS\s0 \fBCompressedData\fR type. OpenSSL must be compiled with \fBzlib\fR
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support for this option to work, otherwise it will output an error.
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.IP "\fB\-uncompress\fR" 4
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.IX Item "-uncompress"
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Uncompress a \s-1CMS\s0 \fBCompressedData\fR type and output the content. OpenSSL must be
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compiled with \fBzlib\fR support for this option to work, otherwise it will
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output an error.
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.IP "\fB\-EncryptedData_decrypt\fR" 4
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.IX Item "-EncryptedData_decrypt"
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Decrypt content using supplied symmetric key and algorithm using a \s-1CMS\s0
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\&\fBEncryptedData\fR type and output the content.
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.IP "\fB\-EncryptedData_encrypt\fR" 4
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.IX Item "-EncryptedData_encrypt"
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Encrypt content using supplied symmetric key and algorithm using a \s-1CMS\s0
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\&\fBEncryptedData\fR type and output the content.
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.IP "\fB\-sign_receipt\fR" 4
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.IX Item "-sign_receipt"
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Generate and output a signed receipt for the supplied message. The input
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message \fBmust\fR contain a signed receipt request. Functionality is otherwise
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similar to the \fB\-sign\fR operation.
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.IP "\fB\-verify_receipt\fR \fIreceipt\fR" 4
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.IX Item "-verify_receipt receipt"
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Verify a signed receipt in filename \fBreceipt\fR. The input message \fBmust\fR
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contain the original receipt request. Functionality is otherwise similar
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to the \fB\-verify\fR operation.
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.IP "\fB\-in\fR \fIfilename\fR" 4
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.IX Item "-in filename"
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The input message to be encrypted or signed or the message to be decrypted
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or verified.
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.IP "\fB\-out\fR \fIfilename\fR" 4
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.IX Item "-out filename"
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The message text that has been decrypted or verified or the output \s-1MIME\s0
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format message that has been signed or verified.
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.IP "\fB\-inform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR" 4
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.IX Item "-inform DER|PEM|SMIME"
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The input format of the \s-1CMS\s0 structure (if one is being read);
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the default is \fB\s-1SMIME\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-outform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR" 4
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.IX Item "-outform DER|PEM|SMIME"
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The output format of the \s-1CMS\s0 structure (if one is being written);
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the default is \fB\s-1SMIME\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-keyform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1ENGINE\s0\fR" 4
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.IX Item "-keyform DER|PEM|ENGINE"
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The format of the private key file; the default is \fB\s-1PEM\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-rctform\fR \fB\s-1DER\s0\fR|\fB\s-1PEM\s0\fR|\fB\s-1SMIME\s0\fR" 4
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.IX Item "-rctform DER|PEM|SMIME"
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The signed receipt format for use with the \fB\-receipt_verify\fR; the default
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is \fB\s-1SMIME\s0\fR.
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See \*(L"Format Options\*(R" in \fIopenssl\fR\|(1) for details.
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.IP "\fB\-stream\fR, \fB\-indef\fR" 4
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.IX Item "-stream, -indef"
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The \fB\-stream\fR and \fB\-indef\fR options are equivalent and enable streaming I/O
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for encoding operations. This permits single pass processing of data without
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the need to hold the entire contents in memory, potentially supporting very
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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\fR \fIfilename\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\-md\fR \fIdigest\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
|
|
\&\fIEVP_get_cipherbyname()\fR function) can also be used preceded by a dash, for
|
|
example \fB\-aes\-128\-cbc\fR. See \fIopenssl\-enc\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\s0 \s-1CRLF\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\fR \fIfile\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\fR \fIfile\fR" 4
|
|
.IX Item "-certsout file"
|
|
Any certificates contained in the message are written to \fIfile\fR.
|
|
.IP "\fB\-signer\fR \fIfile\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\fR \fIfile\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\fR \fIemailaddress\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\fR \fIemailaddress\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\-pwri_password\fR \fIpassword\fR" 4
|
|
.IX Item "-pwri_password password"
|
|
Specify password for recipient.
|
|
.IP "\fB\-secretkey\fR \fIkey\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\fR \fIid\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 \fIid\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\fR \fItype\fR" 4
|
|
.IX Item "-econtent_type type"
|
|
Set the encapsulated content type to \fItype\fR if not supplied the \fBData\fR type
|
|
is used. The \fItype\fR argument can be any valid \s-1OID\s0 name in either text or
|
|
numerical format.
|
|
.IP "\fB\-inkey\fR \fIfile\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\fR \fIname\fR:\fIparameter\fR" 4
|
|
.IX Item "-keyopt name:parameter"
|
|
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\fR \fIarg\fR" 4
|
|
.IX Item "-passin arg"
|
|
The private key password source. For more information about the format of \fBarg\fR
|
|
see \*(L"Pass Phrase Options\*(R" in \fIopenssl\fR\|(1).
|
|
.IP "\fB\-to\fR, \fB\-from\fR, \fB\-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\-allow_proxy_certs\fR, \fB\-attime\fR, \fB\-no_check_time\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\-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 \fB\-issuer_checks\fR" 4
|
|
.IX Item "-allow_proxy_certs, -attime, -no_check_time, -check_ss_sig, -crl_check, -crl_check_all, -explicit_policy, -extended_crl, -ignore_critical, -inhibit_any, -inhibit_map, -no_alt_chains, -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 -issuer_checks"
|
|
Set various options of certificate chain verification.
|
|
See \*(L"Verification Options\*(R" in \fIopenssl\fR\|(1) for details.
|
|
.Sp
|
|
Any verification errors cause the command to exit.
|
|
.IP "\fB\-CAfile\fR \fIfile\fR, \fB\-no\-CAfile\fR, \fB\-CApath\fR \fIdir\fR, \fB\-no\-CApath\fR, \fB\-CAstore\fR \fIuri\fR, \fB\-no\-CAstore\fR" 4
|
|
.IX Item "-CAfile file, -no-CAfile, -CApath dir, -no-CApath, -CAstore uri, -no-CAstore"
|
|
See \*(L"Trusted Certificate Options\*(R" in \fIopenssl\fR\|(1) for details.
|
|
.IP "\fB\-rand\fR \fIfiles\fR, \fB\-writerand\fR \fIfile\fR" 4
|
|
.IX Item "-rand files, -writerand file"
|
|
See \*(L"Random State Options\*(R" in \fIopenssl\fR\|(1) for details.
|
|
.IP "\fB\-engine\fR \fIid\fR" 4
|
|
.IX Item "-engine id"
|
|
See \*(L"Engine Options\*(R" in \fIopenssl\fR\|(1).
|
|
.IP "\fIcert.pem\fR ..." 4
|
|
.IX Item "cert.pem ..."
|
|
One or more certificates of message recipients: used when encrypting
|
|
a message.
|
|
.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 \fICMS_decrypt\fR\|(3)).
|
|
.SH "CADES BASIC ELECTRONIC SIGNATURE (CADES-BES)"
|
|
.IX Header "CADES BASIC ELECTRONIC SIGNATURE (CADES-BES)"
|
|
A CAdES Basic Electronic Signature (CAdES-BES), as defined in the European Standard \s-1ETSI\s0 \s-1EN\s0 319 122\-1 V1.1.1, contains:
|
|
.IP "\(bu" 4
|
|
The signed user data as defined in \s-1CMS\s0 (\s-1RFC\s0 3852);
|
|
.IP "\(bu" 4
|
|
Content-type of the EncapsulatedContentInfo value being signed;
|
|
.IP "\(bu" 4
|
|
Message-digest of the eContent \s-1OCTET\s0 \s-1STRING\s0 within encapContentInfo being signed;
|
|
.IP "\(bu" 4
|
|
An \s-1ESS\s0 signing-certificate or \s-1ESS\s0 signing\-certificate\-v2 attribute, as defined in Enhanced Security Services (\s-1ESS\s0), \s-1RFC\s0 2634 and \s-1RFC\s0 5035.
|
|
An \s-1ESS\s0 signing-certificate attribute only allows for the use of \s-1SHA\-1\s0 as a digest algorithm.
|
|
An \s-1ESS\s0 signing\-certificate\-v2 attribute allows for the use of any digest algorithm.
|
|
.IP "\(bu" 4
|
|
The digital signature value computed on the user data and, when present, on the signed attributes.
|
|
.Sp
|
|
Note that currently the \fB\-cades\fR option applies only to the \fB\-sign\fR operation and is ignored during
|
|
the \fB\-verify\fR operation, i.e. the signing certification is not checked during the verification process.
|
|
This feature might be added in a future version.
|
|
.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"
|
|
\&\fIopenssl\-smime\fR\|(1) can only process the older \fBPKCS#7\fR format.
|
|
\&\fBopenssl cms\fR 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\fR \fI\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 \fIopenssl\-smime\fR\|(1) 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
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.PP
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Send a signed message under Unix directly to sendmail, including headers:
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.PP
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.Vb 3
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\& openssl cms \-sign \-in in.txt \-text \-signer mycert.pem \e
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\& \-from steve@openssl.org \-to someone@somewhere \e
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\& \-subject "Signed message" | sendmail someone@somewhere
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.Ve
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.PP
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Verify a message and extract the signer's certificate if successful:
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|
.PP
|
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.Vb 1
|
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\& openssl cms \-verify \-in mail.msg \-signer user.pem \-out signedtext.txt
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.Ve
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.PP
|
|
Send encrypted mail using triple \s-1DES:\s0
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.PP
|
|
.Vb 3
|
|
\& openssl cms \-encrypt \-in in.txt \-from steve@openssl.org \e
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|
\& \-to someone@somewhere \-subject "Encrypted message" \e
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\& \-des3 user.pem \-out mail.msg
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.Ve
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.PP
|
|
Sign and encrypt mail:
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.PP
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.Vb 4
|
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\& openssl cms \-sign \-in ml.txt \-signer my.pem \-text \e
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\& | openssl cms \-encrypt \-out mail.msg \e
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\& \-from steve@openssl.org \-to someone@somewhere \e
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\& \-subject "Signed and Encrypted message" \-des3 user.pem
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.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.
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.PP
|
|
Decrypt mail:
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|
.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\s0 \s-1KDF\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 "SEE ALSO"
|
|
.IX Header "SEE ALSO"
|
|
\&\fIossl_store\-file\fR\|(7)
|
|
.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 \fB\-keyopt\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\-2019 The OpenSSL Project Authors. All Rights Reserved.
|
|
.PP
|
|
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>.
|