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DIRMNGR(8)                            GNU Privacy Guard 2.2                            DIRMNGR(8)

NAME
       dirmngr - CRL and OCSP daemon

SYNOPSIS
       dirmngr [options] command [args]

DESCRIPTION
       Since  version  2.1  of GnuPG, dirmngr takes care of accessing the OpenPGP keyservers.  As
       with previous versions it is also used as a server for managing and  downloading  certifi-
       cate  revocation  lists (CRLs) for X.509 certificates, downloading X.509 certificates, and
       providing access to OCSP providers.  Dirmngr is invoked internally by gpg, gpgsm,  or  via
       the gpg-connect-agent tool.

COMMANDS
       Commands  are  not distinguished from options except for the fact that only one command is
       allowed.

       --version
              Print the program version and licensing information.  Note that you cannot abbrevi-
              ate this command.

       --help, -h
              Print  a usage message summarizing the most useful command-line options.  Note that
              you cannot abbreviate this command.

       --dump-options
              Print a list of all available options and commands.  Note that you cannot  abbrevi-
              ate this command.

       --server
              Run in server mode and wait for commands on the stdin.  The default mode is to cre-
              ate a socket and listen for commands there.  This is only used for testing.

       --daemon
              Run in background daemon mode and listen for commands on a socket.  This is the way
              dirmngr  is  started  on  demand  by the other GnuPG components.  To force starting
              dirmngr it is in general best to use gpgconf --launch dirmngr.

       --supervised
              Run in the foreground, sending logs to stderr, and listening on file descriptor  3,
              which must already be bound to a listening socket.  This is useful when running un-
              der systemd or other similar process supervision schemes.  This option is not  sup-
              ported on Windows.

       --list-crls
              List  the contents of the CRL cache on stdout. This is probably only useful for de-
              bugging purposes.

       --load-crl file
              This command requires a filename as additional argument, and it will  make  Dirmngr
              try to import the CRL in file into it's cache.  Note, that this is only possible if
              Dirmngr is able to retrieve the CA's certificate directly by  its  own  means.   In
              general it is better to use gpgsm's --call-dirmngr loadcrl filename command so that
              gpgsm can help dirmngr.

       --fetch-crl url
              This command requires an URL as additional argument, and it will make  dirmngr  try
              to  retrieve and import the CRL from that url into it's cache.  This is mainly use-
              ful for debugging purposes.  The dirmngr-client provides the  same  feature  for  a
              running dirmngr.

       --shutdown
              This  commands  shuts  down  an running instance of Dirmngr.  This command has cur-
              rently no effect.

       --flush
              This command removes all CRLs from Dirmngr's  cache.   Client  requests  will  thus
              trigger reading of fresh CRLs.

OPTIONS
       Note that all long options with the exception of --options and --homedir may also be given
       in the configuration file after stripping off the two leading dashes.

       --options file
              Reads configuration from file instead of from the  default  per-user  configuration
              file.   The  default configuration file is named 'dirmngr.conf' and expected in the
              home directory.

       --homedir dir
              Set the name of the home directory to dir.  This option is only effective when used
              on  the  command  line.  The default is the directory named '.gnupg' directly below
              the home directory of the user unless the environment variable GNUPGHOME  has  been
              set  in  which  case  its value will be used.  Many kinds of data are stored within
              this directory.

       -v

       --verbose
              Outputs additional information while running.  You can increase  the  verbosity  by
              giving several verbose commands to dirmngr, such as -vv.

       --log-file file
              Append  all  logging output to file.  This is very helpful in seeing what the agent
              actually does.  Use 'socket://' to log to socket.

       --debug-level level
              Select the debug level for investigating problems.  level may be a numeric value or
              by a keyword:

              none   No debugging at all.  A value of less than 1 may be used instead of the key-
                     word.

              basic  Some basic debug messages.  A value between 1 and 2 may be used  instead  of
                     the keyword.

              advanced
                     More verbose debug messages.  A value between 3 and 5 may be used instead of
                     the keyword.

              expert Even more detailed messages.  A value between 6 and 8 may be used instead of
                     the keyword.

              guru   All  of  the  debug messages you can get. A value greater than 8 may be used
                     instead of the keyword.  The creation of hash tracing files is only  enabled
                     if the keyword is used.

       How  these  messages  are  mapped  to  the actual debugging flags is not specified and may
       change with newer releases of this program. They are however carefully  selected  to  best
       aid in debugging.

       --debug flags
              Set debugging flags.  This option is only useful for debugging and its behavior may
              change with a new release.  All flags are or-ed and may be given in C syntax  (e.g.
              0x0042) or as a comma separated list of flag names.  To get a list of all supported
              flags the single word "help" can be used.

       --debug-all
              Same as --debug=0xffffffff

       --tls-debug level
              Enable debugging of the TLS layer at level.  The details of the debug level  depend
              on the used TLS library and are not set in stone.

       --debug-wait n
              When  running  in server mode, wait n seconds before entering the actual processing
              loop and print the pid.  This gives time to attach a debugger.

       --disable-check-own-socket
              On some platforms dirmngr is able to detect the removal  of  its  socket  file  and
              shutdown itself.  This option disable this self-test for debugging purposes.

       -s
       --sh
       -c
       --csh  Format  the  info  output in daemon mode for use with the standard Bourne shell re-
              spective the C-shell. The default is to guess it based on the environment  variable
              SHELL which is in almost all cases sufficient.

       --force
              Enabling this option forces loading of expired CRLs; this is only useful for debug-
              ging.

       --use-tor
       --no-use-tor
              The option --use-tor switches Dirmngr and thus GnuPG into ``Tor mode'' to route all
              network access via Tor (an anonymity network).  Certain other features are disabled
              in this mode.  The effect of --use-tor cannot be overridden by any other command or
              even  by  reloading dirmngr.  The use of --no-use-tor disables the use of Tor.  The
              default is to use Tor if it is available on startup or after reloading dirmngr.

       --standard-resolver
              This option forces the use of the system's standard DNS  resolver  code.   This  is
              mainly  used  for  debugging.  Note that on Windows a standard resolver is not used
              and all DNS access will return the error ``Not  Implemented''  if  this  option  is
              used.  Using this together with enabled Tor mode returns the error ``Not Enabled''.

       --recursive-resolver
              When possible use a recursive resolver instead of a stub resolver.

       --resolver-timeout n
              Set the timeout for the DNS resolver to N seconds.  The default are 30 seconds.

       --connect-timeout n

       --connect-quick-timeout n
              Set  the  timeout  for  HTTP and generic TCP connection attempts to N seconds.  The
              value set with the quick variant is used when the --quick option has been given  to
              certain  Assuan  commands.   The  quick value is capped at the value of the regular
              connect timeout.  The default values are 15 and 2 seconds.  Note that  the  timeout
              values are for each connection attempt; the connection code will attempt to connect
              all addresses listed for a server.

       --listen-backlog n
              Set the size of the queue for pending connections.  The default is 64.

       --allow-version-check
              Allow Dirmngr to connect to https://versions.gnupg.org to get the list  of  current
              software  versions.   On  debian-packaged  versions, this option does nothing since
              software updates should be handled by the distribution.  See  the  option  --query-
              swdb of the command gpgconf for more details.  Note, that regardless of this option
              a version check can always be triggered using this command:

                gpg-connect-agent --dirmngr 'loadswdb --force' /bye

       --keyserver name
              Use name as your keyserver.  This is the server that gpg communicates with  to  re-
              ceive  keys,  send  keys,  and  search  for keys.  The format of the name is a URI:
              `scheme:[//]keyservername[:port]' The scheme is the type of  keyserver:  "hkp"  for
              the  HTTP  (or  compatible) keyservers, "ldap" for the LDAP keyservers, or "mailto"
              for the Graff email keyserver. Note that your particular installation of GnuPG  may
              have  other  keyserver types available as well. Keyserver schemes are case-insensi-
              tive. After the keyserver name, optional keyserver  configuration  options  may  be
              provided.   These are the same as the --keyserver-options of gpg, but apply only to
              this particular keyserver.

              Most keyservers synchronize with each other, so there is generally no need to  send
              keys  to  more than one server. The keyserver hkp://keys.gnupg.net uses round robin
              DNS to give a different keyserver each time you use it.

              If exactly two keyservers are configured and only  one  is  a  Tor  hidden  service
              (.onion),  Dirmngr selects the keyserver to use depending on whether Tor is locally
              running or not.  The check for a running Tor is done for each new connection.

              If no keyserver is explicitly configured, dirmngr will use the built-in default  of
              hkps://keys.openpgp.org.

              Note  that  the  above default is a Debian-specific choice.  Upstream GnuPG prefers
              hkps://hkps.pool.sks-keyservers.net.  See /usr/share/doc/gpgconf/NEWS.Debian.gz for
              more details.

              Windows  users  with  a  keyserver  running  on  their  Active Directory should use
              ldap:/// for name to access this directory.

              For accessing anonymous LDAP keyservers name is in general just a  ldaps://ldap.ex-
              ample.com.  A BaseDN parameter should never be specified.  If authentication is re-
              quired the value of name is for example:

                keyserver ldaps://ldap.example.com/????bindname=uid=USERNAME
                %2Cou=GnuPG%20Users%2Cdc=example%2Cdc=com,password=PASSWORD

              Put this all on one line without any spaces and keep the '%2C' as given.
              Replace USERNAME, PASSWORD, and the 'dc' parts according to the
              instructions received from the LDAP administrator.  Note that only
              simple authentication (i.e. cleartext passwords) is supported and thus
              using ldaps is strongly suggested.

       --nameserver ipaddr
              In ``Tor mode'' Dirmngr uses a public resolver via Tor to resolve  DNS  names.   If
              the  default  public  resolver, which is 8.8.8.8, shall not be used a different one
              can be given using this option.  Note that a numerical IP  address  must  be  given
              (IPv6 or IPv4) and that no error checking is done for ipaddr.

       --disable-ipv4

       --disable-ipv6
              Disable the use of all IPv4 or IPv6 addresses.

       --disable-ldap
              Entirely disables the use of LDAP.

       --disable-http
              Entirely disables the use of HTTP.

       --ignore-http-dp
              When  looking  for the location of a CRL, the to be tested certificate usually con-
              tains so called CRL Distribution Point (DP) entries which are URLs  describing  the
              way to access the CRL.  The first found DP entry is used.  With this option all en-
              tries using the HTTP scheme are ignored when looking for a suitable DP.

       --ignore-ldap-dp
              This is similar to --ignore-http-dp but ignores  entries  using  the  LDAP  scheme.
              Both options may be combined resulting in ignoring DPs entirely.

       --ignore-ocsp-service-url
              Ignore  all OCSP URLs contained in the certificate.  The effect is to force the use
              of the default responder.

       --honor-http-proxy
              If the environment variable 'http_proxy' has been set, use its value to access HTTP
              servers.

       --http-proxy host[:port]
              Use host and port to access HTTP servers.  The use of this option overrides the en-
              vironment variable 'http_proxy' regardless whether --honor-http-proxy has been set.

       --ldap-proxy host[:port]
              Use host and port to connect to LDAP servers.  If port is omitted, port 389  (stan-
              dard LDAP port) is used.  This overrides any specified host and port part in a LDAP
              URL and will also be used if host and port have been omitted from the URL.

       --only-ldap-proxy
              Never use anything else but the LDAP "proxy" as configured with --ldap-proxy.  Usu-
              ally  dirmngr tries to use other configured LDAP server if the connection using the
              "proxy" failed.

       --ldapserverlist-file file
              Read the list of LDAP servers to consult for CRLs and certificates  from  file  in-
              stead  of the default per-user ldap server list file. The default value for file is
              'dirmngr_ldapservers.conf'.

              This server list file contains one LDAP server per line in the format

              hostname:port:username:password:base_dn

              Lines starting with a  '#' are comments.

              Note that as usual all strings entered are expected to be UTF-8 encoded.  Obviously
              this  will lead to problems if the password has originally been encoded as Latin-1.
              There is no other solution here than to put such a password in the binary  encoding
              into  the  file  (i.e.  non-ascii characters won't show up readable). ([The gpgconf
              tool might be helpful for frontends as it enables editing this  configuration  file
              using percent-escaped strings.])

       --ldaptimeout secs
              Specify the number of seconds to wait for an LDAP query before timing out.  The de-
              fault are 15 seconds.  0 will never timeout.

       --add-servers
              This option makes dirmngr add any servers it discovers when validating certificates
              against CRLs to the internal list of servers to consult for certificates and CRLs.

              This  option is useful when trying to validate a certificate that has a CRL distri-
              bution  point  that  points  to  a  server  that  is  not  already  listed  in  the
              ldapserverlist.  Dirmngr will always go to this server and try to download the CRL,
              but chances are high that the certificate used to sign the CRL is  located  on  the
              same  server.  So if dirmngr doesn't add that new server to list, it will often not
              be able to verify the signature of the CRL unless the --add-servers option is used.

              Note: The current version of dirmngr has this option disabled by default.

       --allow-ocsp
              This option enables OCSP support if requested by the client.

              OCSP requests are rejected by default because they may violate the privacy  of  the
              user; for example it is possible to track the time when a user is reading a mail.

       --ocsp-responder url
              Use  url as the default OCSP Responder if the certificate does not contain informa-
              tion about an assigned responder.  Note, that --ocsp-signer must also be set  to  a
              valid certificate.

       --ocsp-signer fpr|file
              Use  the certificate with the fingerprint fpr to check the responses of the default
              OCSP Responder.  Alternatively a filename can be given in which case  the  response
              is  expected  to  be signed by one of the certificates described in that file.  Any
              argument which contains a slash, dot or tilde  is  considered  a  filename.   Usual
              filename  expansion  takes  place:  A tilde at the start followed by a slash is re-
              placed by the content of 'HOME', no slash at start describes  a  relative  filename
              which  will  be  searched  at  the  home  directory.  To make sure that the file is
              searched in the home directory, either prepend the name with "./"  or  use  a  name
              which contains a dot.

              If  a  response has been signed by a certificate described by these fingerprints no
              further check upon the validity of this certificate is done.

              The format of the FILE is a list of SHA-1 fingerprint, one per line  with  optional
              colons  between  the  bytes.  Empty lines and lines prefix with a hash mark are ig-
              nored.

       --ocsp-max-clock-skew n
              The number of seconds a skew between the OCSP responder and them local clock is ac-
              cepted.  Default is 600 (10 minutes).

       --ocsp-max-period n
              Seconds  a  response  is  at  maximum  considered valid after the time given in the
              thisUpdate field.  Default is 7776000 (90 days).

       --ocsp-current-period n
              The number of seconds an OCSP response is considered valid after the time given  in
              the NEXT_UPDATE datum.  Default is 10800 (3 hours).

       --max-replies n
              Do not return more that n items in one query.  The default is 10.

       --ignore-cert-extension oid
              Add  oid  to the list of ignored certificate extensions.  The oid is expected to be
              in dotted decimal form, like 2.5.29.3.  This option may be  used  more  than  once.
              Critical  flagged  certificate  extensions matching one of the OIDs in the list are
              treated as if they are actually handled and thus the certificate won't be  rejected
              due to an unknown critical extension.  Use this option with care because extensions
              are usually flagged as critical for a reason.

       --hkp-cacert file
              Use the root certificates in file for verification of  the  TLS  certificates  used
              with  hkps  (keyserver  access over TLS).  If the file is in PEM format a suffix of
              .pem is expected for file.  This option may be given multiple  times  to  add  more
              root certificates.  Tilde expansion is supported.

              If  no  hkp-cacert  directive is present, dirmngr will make a reasonable choice: if
              the keyserver in question is the special pool hkps.pool.sks-keyservers.net, it will
              use  the bundled root certificate for that pool.  Otherwise, it will use the system
              CAs.

EXAMPLES
       Here is an example on how to show dirmngr's internal table of OpenPGP keyserver addresses.
       The output is intended for debugging purposes and not part of a defined API.

           gpg-connect-agent --dirmngr 'keyserver --hosttable' /bye

       To  inhibit  the  use of a particular host you have noticed in one of the keyserver pools,
       you may use

          gpg-connect-agent --dirmngr 'keyserver --dead pgpkeys.bnd.de' /bye

       The description of the keyserver command can be printed using

          gpg-connect-agent --dirmngr 'help keyserver' /bye

FILES
       Dirmngr makes use of several directories when running in daemon mode: There are a few con-
       figuration  files whih control the operation of dirmngr.  By default they may all be found
       in the current home directory (see: [option --homedir]).

       dirmngr.conf
              This is the standard configuration file read by dirmngr on startup.  It may contain
              any valid long option; the leading two dashes may not be entered and the option may
              not be abbreviated.  This file is also read after a SIGHUP however not all  options
              will actually have an effect.  This default name may be changed on the command line
              (see: [option --options]).  You should backup this file.

       /etc/gnupg/trusted-certs
              This directory should be filled with certificates of Root CAs you are  trusting  in
              checking the CRLs and signing OCSP Responses.

              Usually these are the same certificates you use with the applications making use of
              dirmngr.  It is expected that each of these certificate files contain  exactly  one
              DER  encoded certificate in a file with the suffix '.crt' or '.der'.  dirmngr reads
              those certificates on startup and when given a SIGHUP.  Certificates which are  not
              readable or do not make up a proper X.509 certificate are ignored; see the log file
              for details.

              Applications using dirmngr (e.g. gpgsm) can request these certificates to  complete
              a trust chain in the same way as with the extra-certs directory (see below).

              Note  that  for  OCSP  responses the certificate specified using the option --ocsp-
              signer is always considered valid to sign OCSP requests.

       /etc/gnupg/extra-certs
              This directory may contain extra certificates which are preloaded into the internal
              cache  on  startup. Applications using dirmngr (e.g. gpgsm) can request cached cer-
              tificates to complete a trust chain.  This is convenient in cases you have a couple
              intermediate  CA  certificates or certificates usually used to sign OCSP responses.
              These certificates are first tried before going out to the net to  look  for  them.
              These certificates must also be DER encoded and suffixed with '.crt' or '.der'.

       ~/.gnupg/crls.d
              This  directory is used to store cached CRLs.  The 'crls.d' part will be created by
              dirmngr if it does not exists but you need to make sure that  the  upper  directory
              exists.

SIGNALS
       A running dirmngr may be controlled by signals, i.e. using the kill command to send a sig-
       nal to the process.

       Here is a list of supported signals:

       SIGHUP This signal flushes all internally cached CRLs as well as any cached  certificates.
              Then  the  certificate  cache  is reinitialized as on startup.  Options are re-read
              from the configuration file.  Instead of sending this signal it is better to use
         gpgconf --reload dirmngr

       SIGTERM
              Shuts down the process but waits until all current requests are fulfilled.  If  the
              process  has received 3 of these signals and requests are still pending, a shutdown
              is forced.  You may also use
         gpgconf --kill dirmngr
       instead of this signal

       SIGINT Shuts down the process immediately.

       SIGUSR1
              This prints some caching statistics to the log file.

SEE ALSO
       gpgsm(1), dirmngr-client(1)

       The full documentation for this tool is maintained as a Texinfo manual.  If GnuPG and  the
       info program are properly installed at your site, the command

         info gnupg

       should give you access to the complete manual including a menu structure and an index.

GnuPG 2.2.27                                2020-12-21                                 DIRMNGR(8)

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