Provided by: gnupg-utils_2.2.12-1ubuntu3_amd64 bug


       symcryptrun - Call a simple symmetric encryption tool


       symcryptrun  --class  class  --program  program  --keyfile  keyfile  [--decrypt|--encrypt]


       Sometimes simple encryption tools are already in use for a long time and there might be  a
       desire  to  integrate them into the GnuPG framework.  The protocols and encryption methods
       might be non-standard or not even properly documented, so that a  full-fledged  encryption
       tool  with  an  interface  like  gpg  is  not doable.  symcryptrun provides a solution: It
       operates by calling the external encryption/decryption module and  provides  a  passphrase
       for a key using the standard pinentry based mechanism through gpg-agent.

       Note,  that  symcryptrun  is  only  available if GnuPG has been configured with '--enable-
       symcryptrun' at build time.

       For encryption, the plain text must be provided on STDIN or as the argument inputfile, and
       the ciphertext will be output to STDOUT.  For decryption vice versa.

       CLASS  describes the calling conventions of the external tool.  Currently it must be given
       as 'confucius'.  PROGRAM is the full filename of that external tool.

       For the class 'confucius' the option --keyfile is required; keyfile is the name of a  file
       containing  the  secret key, which may be protected by a passphrase.  For detailed calling
       conventions, see the source code.

       Note, that gpg-agent must be running before starting symcryptrun.

       The following additional options may be used:

              Output additional information while running.


              Try to be as quiet as possible.

       --homedir dir
              Set the name of the home directory to dir. If this option is  not  used,  the  home
              directory  defaults to ‘~/.gnupg’.  It is only recognized when given on the command
              line.  It also overrides any home directory stated through the environment variable
              ‘GNUPGHOME’   or   (on   Windows   systems)   by   means   of  the  Registry  entry

              On Windows systems it is possible to install GnuPG as a portable  application.   In
              this case only this command line option is considered, all other ways to set a home
              directory are ignored.

              To install GnuPG as a portable application under  Windows,  create  an  empty  file
              named  ‘gpgconf.ctl’  in the same directory as the tool ‘gpgconf.exe’.  The root of
              the installation is then that directory; or, if ‘gpgconf.exe’  has  been  installed
              directly  below  a  directory  named ‘bin’, its parent directory.  You also need to
              make sure that the following directories exist and are  writable:  ‘ROOT/home’  for
              the GnuPG home and ‘ROOT/var/cache/gnupg’ for internal cache files.

       --log-file file
              Append  all  logging output to file.  Use ‘socket://’ to log to socket.  Default is
              to write logging information to STDERR.

       The possible exit status codes of symcryptrun are:


                      Some error occurred.

                      No valid passphrase was provided.

                      The operation was canceled by the user.


       gpg(1), gpgsm(1), gpg-agent(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.