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:
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.
The possible exit status codes of symcryptrun are:
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
should give you access to the complete manual including a menu structure and an index.