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lacme-accountd(1)


NAME

   lacme-accountd - ACME client written with process isolation and minimal
   privileges in mind (account key manager)

SYNOPSIS

   lacme-accountd  [--config=FILENAME]   [--privkey=ARG]   [--socket=PATH]
   [--quiet]

DESCRIPTION

   lacme-accountd  is  the  account  key  manager component of lacme(1), a
   small ACME client written with process isolation and minimal privileges
   in  mind.  No other lacme(1) component needs access to the account key;
   in fact the account key could as well be stored on another  host  or  a
   smartcard.

   lacme-accountd   binds   to   a   UNIX-domain  socket  (specified  with
   --socket=), which ACME clients can connect to in order to request  data
   signatures.   As  a  consequence,  lacme-accountd  needs  to  be up and
   running before using  lacme(1)  to  issue  ACME  commands.   Also,  the
   process  does  not  automatically  terminate  after  the last signature
   request: instead, one sends an INT  or  TERM  signal(7)  to  bring  the
   server down.

   Furthermore,  one can use the UNIX-domain socket forwarding facility of
   OpenSSH 6.7 and later to run lacme-accountd and lacme(1)  on  different
   hosts.   For instance one could store the account key on a machine that
   is not exposed to the internet.  See the examples section below.

OPTIONS

   --config=filename
          Use filename as configuration file.  See the configuration  file
          section below for the configuration options.

   --privkey=arg
          Specify  the  (private) account key to use for signing requests.
          Currently supported arguments are:

          * file:FILE,  to  specify  an  encrypted  private  key  (in  PEM
            format); and

          * gpg:FILE,  to  specify  a gpg(1)-encrypted private key (in PEM
            format).

          The following command can be used to generate  a  new  4096-bits
          RSA key in PEM format with mode 0600:

                 openssl genrsa 4096 | install -m0600 /dev/stdin /path/to/account.key

   --socket=path
          Use path as the UNIX-domain socket to bind against for signature
          requests from the ACME client.  lacme-accountd  aborts  if  path
          exists or if its parent directory is writable by other users.

   -h, --help
          Display a brief help and exit.

   -q, --quiet
          Be quiet.

   --debug
          Turn on debug mode.

CONFIGURATION FILE

   If  --config=  is  not  given,  lacme-accountd  uses the first existing
   configuration         file         among         ./lacme-accountd.conf,
   $XDG_CONFIG_HOME/lacme/lacme-accountd.conf                          (or
   ~/.config/lacme/lacme-accountd.conf if the XDG_CONFIG_HOME  environment
   variable is not set), and /etc/lacme/lacme-accountd.conf.

   When  given  on the command line, the --privkey=, --socket= and --quiet
   options take precedence over their counterpart (without leading --)  in
   the configuration file.  Valid options are:

   privkey
          See  --privkey=.  This option is required when --privkey= is not
          specified on the command line.

   gpg    For a gpg(1)-encrypted private account key, specify  the  binary
          gpg(1)  to  use,  as  well  as  some  default options.  Default:
          gpg --quiet.

   socket See  --socket=.   Default:   $XDG_RUNTIME_DIR/S.lacme   if   the
          XDG_RUNTIME_DIR environment variable is set.

   quiet  Be quiet.  Possible values: Yes/No.

EXAMPLES

   Run lacme-accountd in a first terminal:

          ~$ lacme-accountd --privkey=file:/path/to/account.key --socket=$XDG_RUNTIME_DIR/S.lacme

   Then,  while  lacme-accountd  is  running,  execute locally lacme(1) in
   another terminal:

          ~$ sudo lacme --socket=$XDG_RUNTIME_DIR/S.lacme new-cert

   Alternatively, use OpenSSH 6.7 or  later  to  forward  the  socket  and
   execute lacme(1) remotely:

          ~$ ssh -oExitOnForwardFailure=yes -tt -R /path/to/remote.sock:$XDG_RUNTIME_DIR/S.lacme user@example.org \
             sudo lacme --socket=/path/to/remote.sock new-cert

BUGS AND FEEDBACK

   Bugs  or  feature  requests for lacme-accountd should be filed with the
   Debian project's bug tracker at <https://www.debian.org/Bugs/>.

SEE ALSO

   lacme(1), ssh(1)

AUTHORS

   Guilhem Moulin (mailto:guilhem@fripost.org).

                              March 2016                 lacme-accountd(1)



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