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+\{\
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+. ds o a
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+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "OPENSSL-CMP 1ossl"
+.TH OPENSSL-CMP 1ossl "2023-09-22" "3.0.11" "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\-cmp \- Certificate Management Protocol (CMP, RFC 4210) application
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+\&\fBopenssl\fR \fBcmp\fR
+[\fB\-help\fR]
+[\fB\-config\fR \fIfilename\fR]
+[\fB\-section\fR \fInames\fR]
+[\fB\-verbosity\fR \fIlevel\fR]
+.PP
+Generic message options:
+.PP
+[\fB\-cmd\fR \fIir|cr|kur|p10cr|rr|genm\fR]
+[\fB\-infotype\fR \fIname\fR]
+[\fB\-geninfo\fR \fIOID:int:N\fR]
+.PP
+Certificate enrollment options:
+.PP
+[\fB\-newkey\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-newkeypass\fR \fIarg\fR]
+[\fB\-subject\fR \fIname\fR]
+[\fB\-issuer\fR \fIname\fR]
+[\fB\-days\fR \fInumber\fR]
+[\fB\-reqexts\fR \fIname\fR]
+[\fB\-sans\fR \fIspec\fR]
+[\fB\-san_nodefault\fR]
+[\fB\-policies\fR \fIname\fR]
+[\fB\-policy_oids\fR \fInames\fR]
+[\fB\-policy_oids_critical\fR]
+[\fB\-popo\fR \fInumber\fR]
+[\fB\-csr\fR \fIfilename\fR]
+[\fB\-out_trusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-implicit_confirm\fR]
+[\fB\-disable_confirm\fR]
+[\fB\-certout\fR \fIfilename\fR]
+[\fB\-chainout\fR \fIfilename\fR]
+.PP
+Certificate enrollment and revocation options:
+.PP
+[\fB\-oldcert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-revreason\fR \fInumber\fR]
+.PP
+Message transfer options:
+.PP
+[\fB\-server\fR \fI[http[s]://][userinfo@]host[:port][/path][?query][#fragment]\fR]
+[\fB\-proxy\fR \fI[http[s]://][userinfo@]host[:port][/path][?query][#fragment]\fR]
+[\fB\-no_proxy\fR \fIaddresses\fR]
+[\fB\-recipient\fR \fIname\fR]
+[\fB\-path\fR \fIremote_path\fR]
+[\fB\-keep_alive\fR \fIvalue\fR]
+[\fB\-msg_timeout\fR \fIseconds\fR]
+[\fB\-total_timeout\fR \fIseconds\fR]
+.PP
+Server authentication options:
+.PP
+[\fB\-trusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-untrusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-srvcert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-expect_sender\fR \fIname\fR]
+[\fB\-ignore_keyusage\fR]
+[\fB\-unprotected_errors\fR]
+[\fB\-extracertsout\fR \fIfilename\fR]
+[\fB\-cacertsout\fR \fIfilename\fR]
+.PP
+Client authentication and protection options:
+.PP
+[\fB\-ref\fR \fIvalue\fR]
+[\fB\-secret\fR \fIarg\fR]
+[\fB\-cert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-own_trusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-key\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-keypass\fR \fIarg\fR]
+[\fB\-digest\fR \fIname\fR]
+[\fB\-mac\fR \fIname\fR]
+[\fB\-extracerts\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-unprotected_requests\fR]
+.PP
+Credentials format options:
+.PP
+[\fB\-certform\fR \fIPEM|DER\fR]
+[\fB\-keyform\fR \fIPEM|DER|P12|ENGINE\fR]
+[\fB\-otherpass\fR \fIarg\fR]
+[\fB\-engine\fR \fIid\fR]
+[\fB\-provider\fR \fIname\fR]
+[\fB\-provider\-path\fR \fIpath\fR]
+[\fB\-propquery\fR \fIpropq\fR]
+.PP
+Random state options:
+.PP
+[\fB\-rand\fR \fIfiles\fR]
+[\fB\-writerand\fR \fIfile\fR]
+.PP
+\&\s-1TLS\s0 connection options:
+.PP
+[\fB\-tls_used\fR]
+[\fB\-tls_cert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-tls_key\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-tls_keypass\fR \fIarg\fR]
+[\fB\-tls_extra\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-tls_trusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-tls_host\fR \fIname\fR]
+.PP
+Client-side debugging options:
+.PP
+[\fB\-batch\fR]
+[\fB\-repeat\fR \fInumber\fR]
+[\fB\-reqin\fR \fIfilenames\fR]
+[\fB\-reqin_new_tid\fR]
+[\fB\-reqout\fR \fIfilenames\fR]
+[\fB\-rspin\fR \fIfilenames\fR]
+[\fB\-rspout\fR \fIfilenames\fR]
+[\fB\-use_mock_srv\fR]
+.PP
+Mock server options:
+.PP
+[\fB\-port\fR \fInumber\fR]
+[\fB\-max_msgs\fR \fInumber\fR]
+[\fB\-srv_ref\fR \fIvalue\fR]
+[\fB\-srv_secret\fR \fIarg\fR]
+[\fB\-srv_cert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-srv_key\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-srv_keypass\fR \fIarg\fR]
+[\fB\-srv_trusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-srv_untrusted\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-rsp_cert\fR \fIfilename\fR|\fIuri\fR]
+[\fB\-rsp_extracerts\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-rsp_capubs\fR \fIfilenames\fR|\fIuris\fR]
+[\fB\-poll_count\fR \fInumber\fR]
+[\fB\-check_after\fR \fInumber\fR]
+[\fB\-grant_implicitconf\fR]
+[\fB\-pkistatus\fR \fInumber\fR]
+[\fB\-failure\fR \fInumber\fR]
+[\fB\-failurebits\fR \fInumber\fR]
+[\fB\-statusstring\fR \fIarg\fR]
+[\fB\-send_error\fR]
+[\fB\-send_unprotected\fR]
+[\fB\-send_unprot_err\fR]
+[\fB\-accept_unprotected\fR]
+[\fB\-accept_unprot_err\fR]
+[\fB\-accept_raverified\fR]
+.PP
+Certificate verification options, for both \s-1CMP\s0 and \s-1TLS:\s0
+.PP
+[\fB\-allow_proxy_certs\fR]
+[\fB\-attime\fR \fItimestamp\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\-partial_chain\fR]
+[\fB\-policy\fR \fIarg\fR]
+[\fB\-policy_check\fR]
+[\fB\-policy_print\fR]
+[\fB\-purpose\fR \fIpurpose\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\fR \fInum\fR]
+[\fB\-verify_depth\fR \fInum\fR]
+[\fB\-verify_email\fR \fIemail\fR]
+[\fB\-verify_hostname\fR \fIhostname\fR]
+[\fB\-verify_ip\fR \fIip\fR]
+[\fB\-verify_name\fR \fIname\fR]
+[\fB\-x509_strict\fR]
+[\fB\-issuer_checks\fR]
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+The \fBcmp\fR command is a client implementation for the Certificate
+Management Protocol (\s-1CMP\s0) as defined in \s-1RFC4210.\s0
+It can be used to request certificates from a \s-1CA\s0 server,
+update their certificates,
+request certificates to be revoked, and perform other types of \s-1CMP\s0 requests.
+.SH "OPTIONS"
+.IX Header "OPTIONS"
+.IP "\fB\-help\fR" 4
+.IX Item "-help"
+Display a summary of all options
+.IP "\fB\-config\fR \fIfilename\fR" 4
+.IX Item "-config filename"
+Configuration file to use.
+An empty string \f(CW""\fR means none.
+Default filename is from the environment variable \f(CW\*(C`OPENSSL_CONF\*(C'\fR.
+.IP "\fB\-section\fR \fInames\fR" 4
+.IX Item "-section names"
+Section(s) to use within config file defining \s-1CMP\s0 options.
+An empty string \f(CW""\fR means no specific section.
+Default is \f(CW\*(C`cmp\*(C'\fR.
+.Sp
+Multiple section names may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Contents of sections named later may override contents of sections named before.
+In any case, as usual, the \f(CW\*(C`[default]\*(C'\fR section and finally the unnamed
+section (as far as present) can provide per-option fallback values.
+.IP "\fB\-verbosity\fR \fIlevel\fR" 4
+.IX Item "-verbosity level"
+Level of verbosity for logging, error output, etc.
+0 = \s-1EMERG, 1\s0 = \s-1ALERT, 2\s0 = \s-1CRIT, 3\s0 = \s-1ERR, 4\s0 = \s-1WARN, 5\s0 = \s-1NOTE,
+6\s0 = \s-1INFO, 7\s0 = \s-1DEBUG, 8\s0 = \s-1TRACE.\s0
+Defaults to 6 = \s-1INFO.\s0
+.SS "Generic message options"
+.IX Subsection "Generic message options"
+.IP "\fB\-cmd\fR \fIir|cr|kur|p10cr|rr|genm\fR" 4
+.IX Item "-cmd ir|cr|kur|p10cr|rr|genm"
+\&\s-1CMP\s0 command to execute.
+Currently implemented commands are:
+.RS 4
+.IP "ir \ \- Initialization Request" 8
+.IX Item "ir - Initialization Request"
+.PD 0
+.IP "cr \ \- Certificate Request" 8
+.IX Item "cr - Certificate Request"
+.IP "p10cr \- PKCS#10 Certification Request (for legacy support)" 8
+.IX Item "p10cr - PKCS#10 Certification Request (for legacy support)"
+.IP "kur \ \ \- Key Update Request" 8
+.IX Item "kur - Key Update Request"
+.IP "rr \ \- Revocation Request" 8
+.IX Item "rr - Revocation Request"
+.IP "genm \- General Message" 8
+.IX Item "genm - General Message"
+.RE
+.RS 4
+.PD
+.Sp
+\&\fBir\fR requests initialization of an end entity into a \s-1PKI\s0 hierarchy
+by issuing a first certificate.
+.Sp
+\&\fBcr\fR requests issuing an additional certificate for an end entity already
+initialized to the \s-1PKI\s0 hierarchy.
+.Sp
+\&\fBp10cr\fR requests issuing an additional certificate similarly to \fBcr\fR
+but using legacy PKCS#10 \s-1CSR\s0 format.
+.Sp
+\&\fBkur\fR requests a (key) update for an existing certificate.
+.Sp
+\&\fBrr\fR requests revocation of an existing certificate.
+.Sp
+\&\fBgenm\fR requests information using a General Message, where optionally
+included \fBInfoTypeAndValue\fRs may be used to state which info is of interest.
+Upon receipt of the General Response, information about all received
+\&\s-1ITAV\s0 \fBinfoType\fRs is printed to stdout.
+.RE
+.IP "\fB\-infotype\fR \fIname\fR" 4
+.IX Item "-infotype name"
+Set InfoType name to use for requesting specific info in \fBgenm\fR,
+e.g., \f(CW\*(C`signKeyPairTypes\*(C'\fR.
+.IP "\fB\-geninfo\fR \fIOID:int:N\fR" 4
+.IX Item "-geninfo OID:int:N"
+generalInfo integer values to place in request PKIHeader with given \s-1OID,\s0
+e.g., \f(CW\*(C`1.2.3.4:int:56789\*(C'\fR.
+.SS "Certificate enrollment options"
+.IX Subsection "Certificate enrollment options"
+.IP "\fB\-newkey\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-newkey filename|uri"
+The source of the private or public key for the certificate being requested.
+Defaults to the public key in the PKCS#10 \s-1CSR\s0 given with the \fB\-csr\fR option,
+the public key of the reference certificate, or the current client key.
+.Sp
+The public portion of the key is placed in the certification request.
+.Sp
+Unless \fB\-cmd\fR \fIp10cr\fR, \fB\-popo\fR \fI\-1\fR, or \fB\-popo\fR \fI0\fR is given, the
+private key will be needed as well to provide the proof of possession (\s-1POPO\s0),
+where the \fB\-key\fR option may provide a fallback.
+.IP "\fB\-newkeypass\fR \fIarg\fR" 4
+.IX Item "-newkeypass arg"
+Pass phrase source for the key given with the \fB\-newkey\fR option.
+If not given here, the password will be prompted for if needed.
+.Sp
+For more information about the format of \fIarg\fR see
+\&\fBopenssl\-passphrase\-options\fR\|(1).
+.IP "\fB\-subject\fR \fIname\fR" 4
+.IX Item "-subject name"
+X509 Distinguished Name (\s-1DN\s0) of subject to use in the requested certificate
+template.
+If the NULL-DN (\f(CW"/"\fR) is given then no subject is placed in the template.
+Default is the subject \s-1DN\s0 of any PKCS#10 \s-1CSR\s0 given with the \fB\-csr\fR option.
+For \s-1KUR,\s0 a further fallback is the subject \s-1DN\s0
+of the reference certificate (see \fB\-oldcert\fR) if provided.
+This fallback is used for \s-1IR\s0 and \s-1CR\s0 only if no SANs are set.
+.Sp
+If provided and neither \fB\-cert\fR nor \fB\-oldcert\fR is given,
+the subject \s-1DN\s0 is used as fallback sender of outgoing \s-1CMP\s0 messages.
+.Sp
+The argument must be formatted as \fI/type0=value0/type1=value1/type2=...\fR.
+Special characters may be escaped by \f(CW\*(C`\e\*(C'\fR (backslash); whitespace is retained.
+Empty values are permitted, but the corresponding type will not be included.
+Giving a single \f(CW\*(C`/\*(C'\fR will lead to an empty sequence of RDNs (a NULL-DN).
+Multi-valued RDNs can be formed by placing a \f(CW\*(C`+\*(C'\fR character instead of a \f(CW\*(C`/\*(C'\fR
+between the AttributeValueAssertions (AVAs) that specify the members of the set.
+Example:
+.Sp
+\&\f(CW\*(C`/DC=org/DC=OpenSSL/DC=users/UID=123456+CN=John Doe\*(C'\fR
+.IP "\fB\-issuer\fR \fIname\fR" 4
+.IX Item "-issuer name"
+X509 issuer Distinguished Name (\s-1DN\s0) of the \s-1CA\s0 server
+to place in the requested certificate template in \s-1IR/CR/KUR.\s0
+If the NULL-DN (\f(CW"/"\fR) is given then no issuer is placed in the template.
+.Sp
+If provided and neither \fB\-recipient\fR nor \fB\-srvcert\fR is given,
+the issuer \s-1DN\s0 is used as fallback recipient of outgoing \s-1CMP\s0 messages.
+.Sp
+The argument must be formatted as \fI/type0=value0/type1=value1/type2=...\fR.
+For details see the description of the \fB\-subject\fR option.
+.IP "\fB\-days\fR \fInumber\fR" 4
+.IX Item "-days number"
+Number of days the new certificate is requested to be valid for, counting from
+the current time of the host.
+Also triggers the explicit request that the
+validity period starts from the current time (as seen by the host).
+.IP "\fB\-reqexts\fR \fIname\fR" 4
+.IX Item "-reqexts name"
+Name of section in OpenSSL config file defining certificate request extensions.
+If the \fB\-csr\fR option is present, these extensions augment the extensions
+contained the given PKCS#10 \s-1CSR,\s0 overriding any extensions with same OIDs.
+.IP "\fB\-sans\fR \fIspec\fR" 4
+.IX Item "-sans spec"
+One or more \s-1IP\s0 addresses, \s-1DNS\s0 names, or URIs separated by commas or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R")
+to add as Subject Alternative Name(s) (\s-1SAN\s0) certificate request extension.
+If the special element \*(L"critical\*(R" is given the SANs are flagged as critical.
+Cannot be used if any Subject Alternative Name extension is set via \fB\-reqexts\fR.
+.IP "\fB\-san_nodefault\fR" 4
+.IX Item "-san_nodefault"
+When Subject Alternative Names are not given via \fB\-sans\fR
+nor defined via \fB\-reqexts\fR,
+they are copied by default from the reference certificate (see \fB\-oldcert\fR).
+This can be disabled by giving the \fB\-san_nodefault\fR option.
+.IP "\fB\-policies\fR \fIname\fR" 4
+.IX Item "-policies name"
+Name of section in OpenSSL config file defining policies to be set
+as certificate request extension.
+This option cannot be used together with \fB\-policy_oids\fR.
+.IP "\fB\-policy_oids\fR \fInames\fR" 4
+.IX Item "-policy_oids names"
+One or more \s-1OID\s0(s), separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R")
+to add as certificate policies request extension.
+This option cannot be used together with \fB\-policies\fR.
+.IP "\fB\-policy_oids_critical\fR" 4
+.IX Item "-policy_oids_critical"
+Flag the policies given with \fB\-policy_oids\fR as critical.
+.IP "\fB\-popo\fR \fInumber\fR" 4
+.IX Item "-popo number"
+Proof-of-possession (\s-1POPO\s0) method to use for \s-1IR/CR/KUR\s0; values: \f(CW\*(C`\-1\*(C'\fR..<2> where
+\&\f(CW\*(C`\-1\*(C'\fR = \s-1NONE,\s0 \f(CW0\fR = \s-1RAVERIFIED,\s0 \f(CW1\fR = \s-1SIGNATURE\s0 (default), \f(CW2\fR = \s-1KEYENC.\s0
+.Sp
+Note that a signature-based \s-1POPO\s0 can only be produced if a private key
+is provided via the \fB\-newkey\fR or \fB\-key\fR options.
+.IP "\fB\-csr\fR \fIfilename\fR" 4
+.IX Item "-csr filename"
+PKCS#10 \s-1CSR\s0 in \s-1PEM\s0 or \s-1DER\s0 format containing a certificate request.
+With \fB\-cmd\fR \fIp10cr\fR it is used directly in a legacy P10CR message.
+.Sp
+When used with \fB\-cmd\fR \fIir\fR, \fIcr\fR, or \fIkur\fR,
+it is transformed into the respective regular \s-1CMP\s0 request.
+In this case, a private key must be provided (with \fB\-newkey\fR or \fB\-key\fR)
+for the proof of possession (unless \fB\-popo\fR \fI\-1\fR or \fB\-popo\fR \fI0\fR is used)
+and the respective public key is placed in the certification request
+(rather than taking over the public key contained in the PKCS#10 \s-1CSR\s0).
+.Sp
+PKCS#10 \s-1CSR\s0 input may also be used with \fB\-cmd\fR \fIrr\fR
+to specify the certificate to be revoked
+via the included subject name and public key.
+.IP "\fB\-out_trusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-out_trusted filenames|uris"
+Trusted certificate(s) to use for validating the newly enrolled certificate.
+During this verification, any certificate status checking is disabled.
+.Sp
+Multiple sources may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Each source may contain multiple certificates.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+only affect the certificate verification enabled via this option.
+.IP "\fB\-implicit_confirm\fR" 4
+.IX Item "-implicit_confirm"
+Request implicit confirmation of newly enrolled certificates.
+.IP "\fB\-disable_confirm\fR" 4
+.IX Item "-disable_confirm"
+Do not send certificate confirmation message for newly enrolled certificate
+without requesting implicit confirmation
+to cope with broken servers not supporting implicit confirmation correctly.
+\&\fB\s-1WARNING:\s0\fR This leads to behavior violating \s-1RFC 4210.\s0
+.IP "\fB\-certout\fR \fIfilename\fR" 4
+.IX Item "-certout filename"
+The file where the newly enrolled certificate should be saved.
+.IP "\fB\-chainout\fR \fIfilename\fR" 4
+.IX Item "-chainout filename"
+The file where the chain of the newly enrolled certificate should be saved.
+.SS "Certificate enrollment and revocation options"
+.IX Subsection "Certificate enrollment and revocation options"
+.IP "\fB\-oldcert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-oldcert filename|uri"
+The certificate to be updated (i.e., renewed or re-keyed) in Key Update Request
+(\s-1KUR\s0) messages or to be revoked in Revocation Request (\s-1RR\s0) messages.
+For \s-1KUR\s0 the certificate to be updated defaults to \fB\-cert\fR,
+and the resulting certificate is called \fIreference certificate\fR.
+For \s-1RR\s0 the certificate to be revoked can also be specified using \fB\-csr\fR.
+.Sp
+The reference certificate, if any, is also used for
+deriving default subject \s-1DN\s0 and Subject Alternative Names and the
+default issuer entry in the requested certificate template of an \s-1IR/CR/KUR.\s0
+Its public key is used as a fallback in the template of certification requests.
+Its subject is used as sender of outgoing messages if \fB\-cert\fR is not given.
+Its issuer is used as default recipient in \s-1CMP\s0 message headers
+if neither \fB\-recipient\fR, \fB\-srvcert\fR, nor \fB\-issuer\fR is given.
+.IP "\fB\-revreason\fR \fInumber\fR" 4
+.IX Item "-revreason number"
+Set CRLReason to be included in revocation request (\s-1RR\s0); values: \f(CW0\fR..\f(CW10\fR
+or \f(CW\*(C`\-1\*(C'\fR for none (which is the default).
+.Sp
+Reason numbers defined in \s-1RFC 5280\s0 are:
+.Sp
+.Vb 10
+\& CRLReason ::= ENUMERATED {
+\& unspecified (0),
+\& keyCompromise (1),
+\& cACompromise (2),
+\& affiliationChanged (3),
+\& superseded (4),
+\& cessationOfOperation (5),
+\& certificateHold (6),
+\& \-\- value 7 is not used
+\& removeFromCRL (8),
+\& privilegeWithdrawn (9),
+\& aACompromise (10)
+\& }
+.Ve
+.SS "Message transfer options"
+.IX Subsection "Message transfer options"
+.IP "\fB\-server\fR \fI[http[s]://][userinfo@]host[:port][/path][?query][#fragment]\fR" 4
+.IX Item "-server [http[s]://][userinfo@]host[:port][/path][?query][#fragment]"
+The \s-1DNS\s0 hostname or \s-1IP\s0 address and optionally port
+of the \s-1CMP\s0 server to connect to using \s-1HTTP\s0(S).
+This option excludes \fI\-port\fR and \fI\-use_mock_srv\fR.
+It is ignored if \fI\-rspin\fR is given with enough filename arguments.
+.Sp
+The scheme \f(CW\*(C`https\*(C'\fR may be given only if the \fB\-tls_used\fR option is used.
+In this case the default port is 443, else 80.
+The optional userinfo and fragment components are ignored.
+Any given query component is handled as part of the path component.
+If a path is included it provides the default value for the \fB\-path\fR option.
+.IP "\fB\-proxy\fR \fI[http[s]://][userinfo@]host[:port][/path][?query][#fragment]\fR" 4
+.IX Item "-proxy [http[s]://][userinfo@]host[:port][/path][?query][#fragment]"
+The \s-1HTTP\s0(S) proxy server to use for reaching the \s-1CMP\s0 server unless \fB\-no_proxy\fR
+applies, see below.
+The proxy port defaults to 80 or 443 if the scheme is \f(CW\*(C`https\*(C'\fR; apart from that
+the optional \f(CW\*(C`http://\*(C'\fR or \f(CW\*(C`https://\*(C'\fR prefix is ignored (note that \s-1TLS\s0 may be
+selected by \fB\-tls_used\fR), as well as any path, userinfo, and query, and fragment
+components.
+Defaults to the environment variable \f(CW\*(C`http_proxy\*(C'\fR if set, else \f(CW\*(C`HTTP_PROXY\*(C'\fR
+in case no \s-1TLS\s0 is used, otherwise \f(CW\*(C`https_proxy\*(C'\fR if set, else \f(CW\*(C`HTTPS_PROXY\*(C'\fR.
+This option is ignored if \fI\-server\fR is not given.
+.IP "\fB\-no_proxy\fR \fIaddresses\fR" 4
+.IX Item "-no_proxy addresses"
+List of \s-1IP\s0 addresses and/or \s-1DNS\s0 names of servers
+not to use an \s-1HTTP\s0(S) proxy for, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Default is from the environment variable \f(CW\*(C`no_proxy\*(C'\fR if set, else \f(CW\*(C`NO_PROXY\*(C'\fR.
+This option is ignored if \fI\-server\fR is not given.
+.IP "\fB\-recipient\fR \fIname\fR" 4
+.IX Item "-recipient name"
+Distinguished Name (\s-1DN\s0) to use in the recipient field of \s-1CMP\s0 request message
+headers, i.e., the \s-1CMP\s0 server (usually the addressed \s-1CA\s0).
+.Sp
+The recipient field in the header of a \s-1CMP\s0 message is mandatory.
+If not given explicitly the recipient is determined in the following order:
+the subject of the \s-1CMP\s0 server certificate given with the \fB\-srvcert\fR option,
+the \fB\-issuer\fR option,
+the issuer of the certificate given with the \fB\-oldcert\fR option,
+the issuer of the \s-1CMP\s0 client certificate (\fB\-cert\fR option),
+as far as any of those is present, else the NULL-DN as last resort.
+.Sp
+The argument must be formatted as \fI/type0=value0/type1=value1/type2=...\fR.
+For details see the description of the \fB\-subject\fR option.
+.IP "\fB\-path\fR \fIremote_path\fR" 4
+.IX Item "-path remote_path"
+\&\s-1HTTP\s0 path at the \s-1CMP\s0 server (aka \s-1CMP\s0 alias) to use for \s-1POST\s0 requests.
+Defaults to any path given with \fB\-server\fR, else \f(CW"/"\fR.
+.IP "\fB\-keep_alive\fR \fIvalue\fR" 4
+.IX Item "-keep_alive value"
+If the given value is 0 then \s-1HTTP\s0 connections are not kept open
+after receiving a response, which is the default behavior for \s-1HTTP 1.0.\s0
+If the value is 1 or 2 then persistent connections are requested.
+If the value is 2 then persistent connections are required,
+i.e., in case the server does not grant them an error occurs.
+The default value is 1, which means preferring to keep the connection open.
+.IP "\fB\-msg_timeout\fR \fIseconds\fR" 4
+.IX Item "-msg_timeout seconds"
+Number of seconds a \s-1CMP\s0 request-response message round trip
+is allowed to take before a timeout error is returned.
+A value <= 0 means no limitation (waiting indefinitely).
+Default is to use the \fB\-total_timeout\fR setting.
+.IP "\fB\-total_timeout\fR \fIseconds\fR" 4
+.IX Item "-total_timeout seconds"
+Maximum total number of seconds a transaction may take,
+including polling etc.
+A value <= 0 means no limitation (waiting indefinitely).
+Default is 0.
+.SS "Server authentication options"
+.IX Subsection "Server authentication options"
+.IP "\fB\-trusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-trusted filenames|uris"
+The certificate(s), typically of root CAs, the client shall use as trust anchors
+when validating signature-based protection of \s-1CMP\s0 response messages.
+This option is ignored if the \fB\-srvcert\fR option is given as well.
+It provides more flexibility than \fB\-srvcert\fR because the \s-1CMP\s0 protection
+certificate of the server is not pinned but may be any certificate
+from which a chain to one of the given trust anchors can be constructed.
+.Sp
+If none of \fB\-trusted\fR, \fB\-srvcert\fR, and \fB\-secret\fR is given, message validation
+errors will be thrown unless \fB\-unprotected_errors\fR permits an exception.
+.Sp
+Multiple sources may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Each source may contain multiple certificates.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+have no effect on the certificate verification enabled via this option.
+.IP "\fB\-untrusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-untrusted filenames|uris"
+Non-trusted intermediate \s-1CA\s0 certificate(s).
+Any extra certificates given with the \fB\-cert\fR option are appended to it.
+All these certificates may be useful for cert path construction
+for the own \s-1CMP\s0 signer certificate (to include in the extraCerts field of
+request messages) and for the \s-1TLS\s0 client certificate (if \s-1TLS\s0 is enabled)
+as well as for chain building
+when validating server certificates (checking signature-based
+\&\s-1CMP\s0 message protection) and when validating newly enrolled certificates.
+.Sp
+Multiple filenames or URLs may be given, separated by commas and/or whitespace.
+Each source may contain multiple certificates.
+.IP "\fB\-srvcert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-srvcert filename|uri"
+The specific \s-1CMP\s0 server certificate to expect and directly trust (even if it is
+expired) when verifying signature-based protection of \s-1CMP\s0 response messages.
+This pins the accepted server and results in ignoring the \fB\-trusted\fR option.
+.Sp
+If set, the subject of the certificate is also used
+as default value for the recipient of \s-1CMP\s0 requests
+and as default value for the expected sender of \s-1CMP\s0 responses.
+.IP "\fB\-expect_sender\fR \fIname\fR" 4
+.IX Item "-expect_sender name"
+Distinguished Name (\s-1DN\s0) expected in the sender field of incoming \s-1CMP\s0 messages.
+Defaults to the subject \s-1DN\s0 of the pinned \fB\-srvcert\fR, if any.
+.Sp
+This can be used to make sure that only a particular entity is accepted as
+\&\s-1CMP\s0 message signer, and attackers are not able to use arbitrary certificates
+of a trusted \s-1PKI\s0 hierarchy to fraudulently pose as a \s-1CMP\s0 server.
+Note that this option gives slightly more freedom than setting the \fB\-srvcert\fR,
+which pins the server to the holder of a particular certificate, while the
+expected sender name will continue to match after updates of the server cert.
+.Sp
+The argument must be formatted as \fI/type0=value0/type1=value1/type2=...\fR.
+For details see the description of the \fB\-subject\fR option.
+.IP "\fB\-ignore_keyusage\fR" 4
+.IX Item "-ignore_keyusage"
+Ignore key usage restrictions in \s-1CMP\s0 signer certificates when validating
+signature-based protection of incoming \s-1CMP\s0 messages.
+By default, \f(CW\*(C`digitalSignature\*(C'\fR must be allowed by \s-1CMP\s0 signer certificates.
+.IP "\fB\-unprotected_errors\fR" 4
+.IX Item "-unprotected_errors"
+Accept missing or invalid protection of negative responses from the server.
+This applies to the following message types and contents:
+.RS 4
+.IP "\(bu" 4
+error messages
+.IP "\(bu" 4
+negative certificate responses (\s-1IP/CP/KUP\s0)
+.IP "\(bu" 4
+negative revocation responses (\s-1RP\s0)
+.IP "\(bu" 4
+negative PKIConf messages
+.RE
+.RS 4
+.Sp
+\&\fB\s-1WARNING:\s0\fR This setting leads to unspecified behavior and it is meant
+exclusively to allow interoperability with server implementations violating
+\&\s-1RFC 4210,\s0 e.g.:
+.IP "\(bu" 4
+section 5.1.3.1 allows exceptions from protecting only for special
+cases:
+\&\*(L"There \s-1MAY\s0 be cases in which the PKIProtection \s-1BIT STRING\s0 is deliberately not
+used to protect a message [...] because other protection, external to \s-1PKIX,\s0 will
+be applied instead.\*(R"
+.IP "\(bu" 4
+section 5.3.21 is clear on ErrMsgContent: \*(L"The \s-1CA MUST\s0 always sign it
+with a signature key.\*(R"
+.IP "\(bu" 4
+appendix D.4 shows PKIConf message having protection
+.RE
+.RS 4
+.RE
+.IP "\fB\-extracertsout\fR \fIfilename\fR" 4
+.IX Item "-extracertsout filename"
+The file where to save all certificates contained in the extraCerts field
+of the last received response message (except for pollRep and PKIConf).
+.IP "\fB\-cacertsout\fR \fIfilename\fR" 4
+.IX Item "-cacertsout filename"
+The file where to save any \s-1CA\s0 certificates contained in the caPubs field of
+the last received certificate response (i.e., \s-1IP, CP,\s0 or \s-1KUP\s0) message.
+.SS "Client authentication options"
+.IX Subsection "Client authentication options"
+.IP "\fB\-ref\fR \fIvalue\fR" 4
+.IX Item "-ref value"
+Reference number/string/value to use as fallback senderKID; this is required
+if no sender name can be determined from the \fB\-cert\fR or <\-subject> options and
+is typically used when authenticating with pre-shared key (password-based \s-1MAC\s0).
+.IP "\fB\-secret\fR \fIarg\fR" 4
+.IX Item "-secret arg"
+Provides the source of a secret value to use with MAC-based message protection.
+This takes precedence over the \fB\-cert\fR and \fB\-key\fR options.
+The secret is used for creating MAC-based protection of outgoing messages
+and for validating incoming messages that have MAC-based protection.
+The algorithm used by default is Password-Based Message Authentication Code (\s-1PBM\s0)
+as defined in \s-1RFC 4210\s0 section 5.1.3.1.
+.Sp
+For more information about the format of \fIarg\fR see
+\&\fBopenssl\-passphrase\-options\fR\|(1).
+.IP "\fB\-cert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-cert filename|uri"
+The client's current \s-1CMP\s0 signer certificate.
+Requires the corresponding key to be given with \fB\-key\fR.
+.Sp
+The subject and the public key contained in this certificate
+serve as fallback values in the certificate template of \s-1IR/CR/KUR\s0 messages.
+.Sp
+The subject of this certificate will be used as sender of outgoing \s-1CMP\s0 messages,
+while the subject of \fB\-oldcert\fR or \fB\-subjectName\fR may provide fallback values.
+.Sp
+The issuer of this certificate is used as one of the recipient fallback values
+and as fallback issuer entry in the certificate template of \s-1IR/CR/KUR\s0 messages.
+.Sp
+When performing signature-based message protection,
+this \*(L"protection certificate\*(R", also called \*(L"signer certificate\*(R",
+will be included first in the extraCerts field of outgoing messages
+and the signature is done with the corresponding key.
+In Initialization Request (\s-1IR\s0) messages this can be used for authenticating
+using an external entity certificate as defined in appendix E.7 of \s-1RFC 4210.\s0
+.Sp
+For Key Update Request (\s-1KUR\s0) messages this is also used as
+the certificate to be updated if the \fB\-oldcert\fR option is not given.
+.Sp
+If the file includes further certs, they are appended to the untrusted certs
+because they typically constitute the chain of the client certificate, which
+is included in the extraCerts field in signature-protected request messages.
+.IP "\fB\-own_trusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-own_trusted filenames|uris"
+If this list of certificates is provided then the chain built for
+the client-side \s-1CMP\s0 signer certificate given with the \fB\-cert\fR option
+is verified using the given certificates as trust anchors.
+.Sp
+Multiple sources may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Each source may contain multiple certificates.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+have no effect on the certificate verification enabled via this option.
+.IP "\fB\-key\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-key filename|uri"
+The corresponding private key file for the client's current certificate given in
+the \fB\-cert\fR option.
+This will be used for signature-based message protection unless the \fB\-secret\fR
+option indicating MAC-based protection or \fB\-unprotected_requests\fR is given.
+.Sp
+It is also used as a fallback for the \fB\-newkey\fR option with \s-1IR/CR/KUR\s0 messages.
+.IP "\fB\-keypass\fR \fIarg\fR" 4
+.IX Item "-keypass arg"
+Pass phrase source for the private key given with the \fB\-key\fR option.
+Also used for \fB\-cert\fR and \fB\-oldcert\fR in case it is an encrypted PKCS#12 file.
+If not given here, the password will be prompted for if needed.
+.Sp
+For more information about the format of \fIarg\fR see
+\&\fBopenssl\-passphrase\-options\fR\|(1).
+.IP "\fB\-digest\fR \fIname\fR" 4
+.IX Item "-digest name"
+Specifies name of supported digest to use in \s-1RFC 4210\s0's \s-1MSG_SIG_ALG\s0
+and as the one-way function (\s-1OWF\s0) in \f(CW\*(C`MSG_MAC_ALG\*(C'\fR.
+If applicable, this is used for message protection and
+proof-of-possession (\s-1POPO\s0) signatures.
+To see the list of supported digests, use \f(CW\*(C`openssl list \-digest\-commands\*(C'\fR.
+Defaults to \f(CW\*(C`sha256\*(C'\fR.
+.IP "\fB\-mac\fR \fIname\fR" 4
+.IX Item "-mac name"
+Specifies the name of the \s-1MAC\s0 algorithm in \f(CW\*(C`MSG_MAC_ALG\*(C'\fR.
+To get the names of supported \s-1MAC\s0 algorithms use \f(CW\*(C`openssl list \-mac\-algorithms\*(C'\fR
+and possibly combine such a name with the name of a supported digest algorithm,
+e.g., hmacWithSHA256.
+Defaults to \f(CW\*(C`hmac\-sha1\*(C'\fR as per \s-1RFC 4210.\s0
+.IP "\fB\-extracerts\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-extracerts filenames|uris"
+Certificates to append in the extraCerts field when sending messages.
+They can be used as the default \s-1CMP\s0 signer certificate chain to include.
+.Sp
+Multiple sources may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Each source may contain multiple certificates.
+.IP "\fB\-unprotected_requests\fR" 4
+.IX Item "-unprotected_requests"
+Send request messages without CMP-level protection.
+.SS "Credentials format options"
+.IX Subsection "Credentials format options"
+.IP "\fB\-certform\fR \fIPEM|DER\fR" 4
+.IX Item "-certform PEM|DER"
+File format to use when saving a certificate to a file.
+Default value is \s-1PEM.\s0
+.IP "\fB\-keyform\fR \fIPEM|DER|P12|ENGINE\fR" 4
+.IX Item "-keyform PEM|DER|P12|ENGINE"
+The format of the key input; unspecified by default.
+See \*(L"Format Options\*(R" in \fBopenssl\fR\|(1) for details.
+.IP "\fB\-otherpass\fR \fIarg\fR" 4
+.IX Item "-otherpass arg"
+Pass phrase source for certificate given with the \fB\-trusted\fR, \fB\-untrusted\fR,
+\&\fB\-own_trusted\fR, \fB\-srvcert\fR, \fB\-out_trusted\fR, \fB\-extracerts\fR,
+\&\fB\-srv_trusted\fR, \fB\-srv_untrusted\fR, \fB\-rsp_extracerts\fR, \fB\-rsp_capubs\fR,
+\&\fB\-tls_extra\fR, and \fB\-tls_trusted\fR options.
+If not given here, the password will be prompted for if needed.
+.Sp
+For more information about the format of \fIarg\fR see
+\&\fBopenssl\-passphrase\-options\fR\|(1).
+.IP "\fB\-engine\fR \fIid\fR" 4
+.IX Item "-engine id"
+See \*(L"Engine Options\*(R" in \fBopenssl\fR\|(1).
+This option is deprecated.
+.Sp
+As an alternative to using this combination:
+.Sp
+.Vb 1
+\& \-engine {engineid} \-key {keyid} \-keyform ENGINE
+.Ve
+.Sp
+\&... it's also possible to just give the key \s-1ID\s0 in \s-1URI\s0 form to \fB\-key\fR,
+like this:
+.Sp
+.Vb 1
+\& \-key org.openssl.engine:{engineid}:{keyid}
+.Ve
+.Sp
+This applies to all options specifying keys: \fB\-key\fR, \fB\-newkey\fR, and
+\&\fB\-tls_key\fR.
+.SS "Provider options"
+.IX Subsection "Provider options"
+.IP "\fB\-provider\fR \fIname\fR" 4
+.IX Item "-provider name"
+.PD 0
+.IP "\fB\-provider\-path\fR \fIpath\fR" 4
+.IX Item "-provider-path path"
+.IP "\fB\-propquery\fR \fIpropq\fR" 4
+.IX Item "-propquery propq"
+.PD
+See \*(L"Provider Options\*(R" in \fBopenssl\fR\|(1), \fBprovider\fR\|(7), and \fBproperty\fR\|(7).
+.SS "Random state options"
+.IX Subsection "Random state options"
+.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 \fBopenssl\fR\|(1) for details.
+.SS "\s-1TLS\s0 connection options"
+.IX Subsection "TLS connection options"
+.IP "\fB\-tls_used\fR" 4
+.IX Item "-tls_used"
+Enable using \s-1TLS\s0 (even when other TLS-related options are not set)
+for message exchange with \s-1CMP\s0 server via \s-1HTTP.\s0
+This option is not supported with the \fI\-port\fR option.
+It is ignored if the \fI\-server\fR option is not given or \fI\-use_mock_srv\fR is given
+or \fI\-rspin\fR is given with enough filename arguments.
+.Sp
+The following TLS-related options are ignored
+if \fB\-tls_used\fR is not given or does not take effect.
+.IP "\fB\-tls_cert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-tls_cert filename|uri"
+Client's \s-1TLS\s0 certificate.
+If the source includes further certs they are used (along with \fB\-untrusted\fR
+certs) for constructing the client cert chain provided to the \s-1TLS\s0 server.
+.IP "\fB\-tls_key\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-tls_key filename|uri"
+Private key for the client's \s-1TLS\s0 certificate.
+.IP "\fB\-tls_keypass\fR \fIarg\fR" 4
+.IX Item "-tls_keypass arg"
+Pass phrase source for client's private \s-1TLS\s0 key \fB\-tls_key\fR.
+Also used for \fB\-tls_cert\fR in case it is an encrypted PKCS#12 file.
+If not given here, the password will be prompted for if needed.
+.Sp
+For more information about the format of \fIarg\fR see
+\&\fBopenssl\-passphrase\-options\fR\|(1).
+.IP "\fB\-tls_extra\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-tls_extra filenames|uris"
+Extra certificates to provide to \s-1TLS\s0 server during \s-1TLS\s0 handshake
+.IP "\fB\-tls_trusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-tls_trusted filenames|uris"
+Trusted certificate(s) to use for validating the \s-1TLS\s0 server certificate.
+This implies hostname validation.
+.Sp
+Multiple sources may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+Each source may contain multiple certificates.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+have no effect on the certificate verification enabled via this option.
+.IP "\fB\-tls_host\fR \fIname\fR" 4
+.IX Item "-tls_host name"
+Address to be checked during hostname validation.
+This may be a \s-1DNS\s0 name or an \s-1IP\s0 address.
+If not given it defaults to the \fB\-server\fR address.
+.SS "Client-side debugging options"
+.IX Subsection "Client-side debugging options"
+.IP "\fB\-batch\fR" 4
+.IX Item "-batch"
+Do not interactively prompt for input, for instance when a password is needed.
+This can be useful for batch processing and testing.
+.IP "\fB\-repeat\fR \fInumber\fR" 4
+.IX Item "-repeat number"
+Invoke the command the given positive number of times with the same parameters.
+Default is one invocation.
+.IP "\fB\-reqin\fR \fIfilenames\fR" 4
+.IX Item "-reqin filenames"
+Take the sequence of \s-1CMP\s0 requests to send to the server from the given file(s)
+rather than from the sequence of requests produced internally.
+.Sp
+This option is ignored if the \fB\-rspin\fR option is given
+because in the latter case no requests are actually sent.
+.Sp
+Multiple filenames may be given, separated by commas and/or whitespace
+(where in the latter case the whole argument must be enclosed in \*(L"...\*(R").
+.Sp
+The files are read as far as needed to complete the transaction
+and filenames have been provided. If more requests are needed,
+the remaining ones are taken from the items at the respective position
+in the sequence of requests produced internally.
+.Sp
+The client needs to update the recipNonce field in the given requests (except
+for the first one) in order to satisfy the checks to be performed by the server.
+This causes re-protection (if protecting requests is required).
+.IP "\fB\-reqin_new_tid\fR" 4
+.IX Item "-reqin_new_tid"
+Use a fresh transactionID for \s-1CMP\s0 request messages read using \fB\-reqin\fR,
+which causes their reprotection (if protecting requests is required).
+This may be needed in case the sequence of requests is reused
+and the \s-1CMP\s0 server complains that the transaction \s-1ID\s0 has already been used.
+.IP "\fB\-reqout\fR \fIfilenames\fR" 4
+.IX Item "-reqout filenames"
+Save the sequence of \s-1CMP\s0 requests created by the client to the given file(s).
+These requests are not sent to the server if the \fB\-reqin\fR option is used, too.
+.Sp
+Multiple filenames may be given, separated by commas and/or whitespace.
+.Sp
+Files are written as far as needed to save the transaction
+and filenames have been provided.
+If the transaction contains more requests, the remaining ones are not saved.
+.IP "\fB\-rspin\fR \fIfilenames\fR" 4
+.IX Item "-rspin filenames"
+Process the sequence of \s-1CMP\s0 responses provided in the given file(s),
+not contacting any given server,
+as long as enough filenames are provided to complete the transaction.
+.Sp
+Multiple filenames may be given, separated by commas and/or whitespace.
+.Sp
+Any server specified via the \fI\-server\fR or \fI\-use_mock_srv\fR options is contacted
+only if more responses are needed to complete the transaction.
+In this case the transaction will fail
+unless the server has been prepared to continue the already started transaction.
+.IP "\fB\-rspout\fR \fIfilenames\fR" 4
+.IX Item "-rspout filenames"
+Save the sequence of actually used \s-1CMP\s0 responses to the given file(s).
+These have been received from the server unless \fB\-rspin\fR takes effect.
+.Sp
+Multiple filenames may be given, separated by commas and/or whitespace.
+.Sp
+Files are written as far as needed to save the responses
+contained in the transaction and filenames have been provided.
+If the transaction contains more responses, the remaining ones are not saved.
+.IP "\fB\-use_mock_srv\fR" 4
+.IX Item "-use_mock_srv"
+Test the client using the internal \s-1CMP\s0 server mock-up at \s-1API\s0 level,
+bypassing socket-based transfer via \s-1HTTP.\s0
+This excludes the \fB\-server\fR and \fB\-port\fR options.
+.SS "Mock server options"
+.IX Subsection "Mock server options"
+.IP "\fB\-port\fR \fInumber\fR" 4
+.IX Item "-port number"
+Act as HTTP-based \s-1CMP\s0 server mock-up listening on the given port.
+This excludes the \fB\-server\fR and \fB\-use_mock_srv\fR options.
+The \fB\-rspin\fR, \fB\-rspout\fR, \fB\-reqin\fR, and \fB\-reqout\fR options
+so far are not supported in this mode.
+.IP "\fB\-max_msgs\fR \fInumber\fR" 4
+.IX Item "-max_msgs number"
+Maximum number of \s-1CMP\s0 (request) messages the \s-1CMP HTTP\s0 server mock-up
+should handle, which must be nonnegative.
+The default value is 0, which means that no limit is imposed.
+In any case the server terminates on internal errors, but not when it
+detects a CMP-level error that it can successfully answer with an error message.
+.IP "\fB\-srv_ref\fR \fIvalue\fR" 4
+.IX Item "-srv_ref value"
+Reference value to use as senderKID of server in case no \fB\-srv_cert\fR is given.
+.IP "\fB\-srv_secret\fR \fIarg\fR" 4
+.IX Item "-srv_secret arg"
+Password source for server authentication with a pre-shared key (secret).
+.IP "\fB\-srv_cert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-srv_cert filename|uri"
+Certificate of the server.
+.IP "\fB\-srv_key\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-srv_key filename|uri"
+Private key used by the server for signing messages.
+.IP "\fB\-srv_keypass\fR \fIarg\fR" 4
+.IX Item "-srv_keypass arg"
+Server private key (and cert) file pass phrase source.
+.IP "\fB\-srv_trusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-srv_trusted filenames|uris"
+Trusted certificates for client authentication.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+have no effect on the certificate verification enabled via this option.
+.IP "\fB\-srv_untrusted\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-srv_untrusted filenames|uris"
+Intermediate \s-1CA\s0 certs that may be useful when validating client certificates.
+.IP "\fB\-rsp_cert\fR \fIfilename\fR|\fIuri\fR" 4
+.IX Item "-rsp_cert filename|uri"
+Certificate to be returned as mock enrollment result.
+.IP "\fB\-rsp_extracerts\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-rsp_extracerts filenames|uris"
+Extra certificates to be included in mock certification responses.
+.IP "\fB\-rsp_capubs\fR \fIfilenames\fR|\fIuris\fR" 4
+.IX Item "-rsp_capubs filenames|uris"
+\&\s-1CA\s0 certificates to be included in mock Initialization Response (\s-1IP\s0) message.
+.IP "\fB\-poll_count\fR \fInumber\fR" 4
+.IX Item "-poll_count number"
+Number of times the client must poll before receiving a certificate.
+.IP "\fB\-check_after\fR \fInumber\fR" 4
+.IX Item "-check_after number"
+The checkAfter value (number of seconds to wait) to include in poll response.
+.IP "\fB\-grant_implicitconf\fR" 4
+.IX Item "-grant_implicitconf"
+Grant implicit confirmation of newly enrolled certificate.
+.IP "\fB\-pkistatus\fR \fInumber\fR" 4
+.IX Item "-pkistatus number"
+PKIStatus to be included in server response.
+Valid range is 0 (accepted) .. 6 (keyUpdateWarning).
+.IP "\fB\-failure\fR \fInumber\fR" 4
+.IX Item "-failure number"
+A single failure info bit number to be included in server response.
+Valid range is 0 (badAlg) .. 26 (duplicateCertReq).
+.IP "\fB\-failurebits\fR \fInumber\fR Number representing failure bits to be included in server response. Valid range is 0 .. 2^27 \- 1." 4
+.IX Item "-failurebits number Number representing failure bits to be included in server response. Valid range is 0 .. 2^27 - 1."
+.PD 0
+.IP "\fB\-statusstring\fR \fIarg\fR" 4
+.IX Item "-statusstring arg"
+.PD
+Text to be included as status string in server response.
+.IP "\fB\-send_error\fR" 4
+.IX Item "-send_error"
+Force server to reply with error message.
+.IP "\fB\-send_unprotected\fR" 4
+.IX Item "-send_unprotected"
+Send response messages without CMP-level protection.
+.IP "\fB\-send_unprot_err\fR" 4
+.IX Item "-send_unprot_err"
+In case of negative responses, server shall send unprotected error messages,
+certificate responses (\s-1IP/CP/KUP\s0), and revocation responses (\s-1RP\s0).
+\&\s-1WARNING:\s0 This setting leads to behavior violating \s-1RFC 4210.\s0
+.IP "\fB\-accept_unprotected\fR" 4
+.IX Item "-accept_unprotected"
+Accept missing or invalid protection of requests.
+.IP "\fB\-accept_unprot_err\fR" 4
+.IX Item "-accept_unprot_err"
+Accept unprotected error messages from client.
+So far this has no effect because the server does not accept any error messages.
+.IP "\fB\-accept_raverified\fR" 4
+.IX Item "-accept_raverified"
+Accept \s-1RAVERIFED\s0 as proof of possession (\s-1POPO\s0).
+.SS "Certificate verification options, for both \s-1CMP\s0 and \s-1TLS\s0"
+.IX Subsection "Certificate verification options, for both CMP and TLS"
+.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 \fBopenssl\-verification\-options\fR\|(1) for details.
+.Sp
+The certificate verification options
+\&\fB\-verify_hostname\fR, \fB\-verify_ip\fR, and \fB\-verify_email\fR
+only affect the certificate verification enabled via the \fB\-out_trusted\fR option.
+.SH "NOTES"
+.IX Header "NOTES"
+When a client obtains from a \s-1CMP\s0 server \s-1CA\s0 certificates that it is going to
+trust, for instance via the \f(CW\*(C`caPubs\*(C'\fR field of a certificate response,
+authentication of the \s-1CMP\s0 server is particularly critical.
+So special care must be taken setting up server authentication
+using \fB\-trusted\fR and related options for certificate-based authentication
+or \fB\-secret\fR for MAC-based protection.
+.PP
+When setting up \s-1CMP\s0 configurations and experimenting with enrollment options
+typically various errors occur until the configuration is correct and complete.
+When the \s-1CMP\s0 server reports an error the client will by default
+check the protection of the \s-1CMP\s0 response message.
+Yet some \s-1CMP\s0 services tend not to protect negative responses.
+In this case the client will reject them, and thus their contents are not shown
+although they usually contain hints that would be helpful for diagnostics.
+For assisting in such cases the \s-1CMP\s0 client offers a workaround via the
+\&\fB\-unprotected_errors\fR option, which allows accepting such negative messages.
+.SH "EXAMPLES"
+.IX Header "EXAMPLES"
+.SS "Simple examples using the default OpenSSL configuration file"
+.IX Subsection "Simple examples using the default OpenSSL configuration file"
+This \s-1CMP\s0 client implementation comes with demonstrative \s-1CMP\s0 sections
+in the example configuration file \fIopenssl/apps/openssl.cnf\fR,
+which can be used to interact conveniently with the Insta Demo \s-1CA.\s0
+.PP
+In order to enroll an initial certificate from that \s-1CA\s0 it is sufficient
+to issue the following shell commands.
+.PP
+.Vb 1
+\& export OPENSSL_CONF=/path/to/openssl/apps/openssl.cnf
+.Ve
+.PP
+.Vb 2
+\& openssl genrsa \-out insta.priv.pem
+\& openssl cmp \-section insta
+.Ve
+.PP
+This should produce the file \fIinsta.cert.pem\fR containing a new certificate
+for the private key held in \fIinsta.priv.pem\fR.
+It can be viewed using, e.g.,
+.PP
+.Vb 1
+\& openssl x509 \-noout \-text \-in insta.cert.pem
+.Ve
+.PP
+In case the network setup requires using an \s-1HTTP\s0 proxy it may be given as usual
+via the environment variable \fBhttp_proxy\fR or via the \fB\-proxy\fR option in the
+configuration file or the \s-1CMP\s0 command-line argument \fB\-proxy\fR, for example
+.PP
+.Vb 1
+\& \-proxy http://192.168.1.1:8080
+.Ve
+.PP
+In the Insta Demo \s-1CA\s0 scenario both clients and the server may use the pre-shared
+secret \fIinsta\fR and the reference value \fI3078\fR to authenticate to each other.
+.PP
+Alternatively, \s-1CMP\s0 messages may be protected in signature-based manner,
+where the trust anchor in this case is \fIinsta.ca.crt\fR
+and the client may use any certificate already obtained from that \s-1CA,\s0
+as specified in the \fB[signature]\fR section of the example configuration.
+This can be used in combination with the \fB[insta]\fR section simply by
+.PP
+.Vb 1
+\& openssl cmp \-section insta,signature
+.Ve
+.PP
+By default the \s-1CMP IR\s0 message type is used, yet \s-1CR\s0 works equally here.
+This may be specified directly at the command line:
+.PP
+.Vb 1
+\& openssl cmp \-section insta \-cmd cr
+.Ve
+.PP
+or by referencing in addition the \fB[cr]\fR section of the example configuration:
+.PP
+.Vb 1
+\& openssl cmp \-section insta,cr
+.Ve
+.PP
+In order to update the enrolled certificate one may call
+.PP
+.Vb 1
+\& openssl cmp \-section insta,kur
+.Ve
+.PP
+using MAC-based protection with \s-1PBM\s0 or
+.PP
+.Vb 1
+\& openssl cmp \-section insta,kur,signature
+.Ve
+.PP
+using signature-based protection.
+.PP
+In a similar way any previously enrolled certificate may be revoked by
+.PP
+.Vb 1
+\& openssl cmp \-section insta,rr \-trusted insta.ca.crt
+.Ve
+.PP
+or
+.PP
+.Vb 1
+\& openssl cmp \-section insta,rr,signature
+.Ve
+.PP
+Many more options can be given in the configuration file
+and/or on the command line.
+For instance, the \fB\-reqexts\fR \s-1CLI\s0 option may refer to a section in the
+configuration file defining X.509 extensions to use in certificate requests,
+such as \f(CW\*(C`v3_req\*(C'\fR in \fIopenssl/apps/openssl.cnf\fR:
+.PP
+.Vb 1
+\& openssl cmp \-section insta,cr \-reqexts v3_req
+.Ve
+.SS "Certificate enrollment"
+.IX Subsection "Certificate enrollment"
+The following examples do not make use of a configuration file at first.
+They assume that a \s-1CMP\s0 server can be contacted on the local \s-1TCP\s0 port 80
+and accepts requests under the alias \fI/pkix/\fR.
+.PP
+For enrolling its very first certificate the client generates a client key
+and sends an initial request message to the local \s-1CMP\s0 server
+using a pre-shared secret key for mutual authentication.
+In this example the client does not have the \s-1CA\s0 certificate yet,
+so we specify the name of the \s-1CA\s0 with the \fB\-recipient\fR option
+and save any \s-1CA\s0 certificates that we may receive in the \f(CW\*(C`capubs.pem\*(C'\fR file.
+.PP
+In below command line usage examples the \f(CW\*(C`\e\*(C'\fR at line ends is used just
+for formatting; each of the command invocations should be on a single line.
+.PP
+.Vb 5
+\& openssl genrsa \-out cl_key.pem
+\& openssl cmp \-cmd ir \-server 127.0.0.1:80/pkix/ \-recipient "/CN=CMPserver" \e
+\& \-ref 1234 \-secret pass:1234\-5678 \e
+\& \-newkey cl_key.pem \-subject "/CN=MyName" \e
+\& \-cacertsout capubs.pem \-certout cl_cert.pem
+.Ve
+.SS "Certificate update"
+.IX Subsection "Certificate update"
+Then, when the client certificate and its related key pair needs to be updated,
+the client can send a key update request taking the certs in \f(CW\*(C`capubs.pem\*(C'\fR
+as trusted for authenticating the server and using the previous cert and key
+for its own authentication.
+Then it can start using the new cert and key.
+.PP
+.Vb 6
+\& openssl genrsa \-out cl_key_new.pem
+\& openssl cmp \-cmd kur \-server 127.0.0.1:80/pkix/ \e
+\& \-trusted capubs.pem \e
+\& \-cert cl_cert.pem \-key cl_key.pem \e
+\& \-newkey cl_key_new.pem \-certout cl_cert.pem
+\& cp cl_key_new.pem cl_key.pem
+.Ve
+.PP
+This command sequence can be repeated as often as needed.
+.SS "Requesting information from \s-1CMP\s0 server"
+.IX Subsection "Requesting information from CMP server"
+Requesting \*(L"all relevant information\*(R" with an empty General Message.
+This prints information about all received \s-1ITAV\s0 \fBinfoType\fRs to stdout.
+.PP
+.Vb 2
+\& openssl cmp \-cmd genm \-server 127.0.0.1/pkix/ \-recipient "/CN=CMPserver" \e
+\& \-ref 1234 \-secret pass:1234\-5678
+.Ve
+.SS "Using a custom configuration file"
+.IX Subsection "Using a custom configuration file"
+For \s-1CMP\s0 client invocations, in particular for certificate enrollment,
+usually many parameters need to be set, which is tedious and error-prone to do
+on the command line.
+Therefore, the client offers the possibility to read
+options from sections of the OpenSSL config file, usually called \fIopenssl.cnf\fR.
+The values found there can still be extended and even overridden by any
+subsequently loaded sections and on the command line.
+.PP
+After including in the configuration file the following sections:
+.PP
+.Vb 8
+\& [cmp]
+\& server = 127.0.0.1
+\& path = pkix/
+\& trusted = capubs.pem
+\& cert = cl_cert.pem
+\& key = cl_key.pem
+\& newkey = cl_key.pem
+\& certout = cl_cert.pem
+\&
+\& [init]
+\& recipient = "/CN=CMPserver"
+\& trusted =
+\& cert =
+\& key =
+\& ref = 1234
+\& secret = pass:1234\-5678\-1234\-567
+\& subject = "/CN=MyName"
+\& cacertsout = capubs.pem
+.Ve
+.PP
+the above enrollment transactions reduce to
+.PP
+.Vb 2
+\& openssl cmp \-section cmp,init
+\& openssl cmp \-cmd kur \-newkey cl_key_new.pem
+.Ve
+.PP
+and the above transaction using a general message reduces to
+.PP
+.Vb 1
+\& openssl cmp \-section cmp,init \-cmd genm
+.Ve
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fBopenssl\-genrsa\fR\|(1), \fBopenssl\-ecparam\fR\|(1), \fBopenssl\-list\fR\|(1),
+\&\fBopenssl\-req\fR\|(1), \fBopenssl\-x509\fR\|(1), \fBx509v3_config\fR\|(5)
+.SH "HISTORY"
+.IX Header "HISTORY"
+The \fBcmp\fR application was added in OpenSSL 3.0.
+.PP
+The \fB\-engine option\fR was deprecated in OpenSSL 3.0.
+.SH "COPYRIGHT"
+.IX Header "COPYRIGHT"
+Copyright 2007\-2023 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>.