symcryptrun - Online in the Cloud

PROGRAM:

NAME

symcryptrun - Call a simple symmetric encryption tool

SYNOPSIS

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

DESCRIPTION

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:

-v

--verbose
Output additional information while running.

-q

--quiet
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
HKCU\Software\GNU\GnuPG:HomeDir.

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 name
‘gpgconf.ctl’ in the same directory as the tool ‘gpgconf.exe’. The root of the
installation is than 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/gnupg2’ for internal cache files.

--log-file file
Append all logging output to file. Default is to write logging information to
STDERR.

The possible exit status codes of symcryptrun are:

0
Success.

1
Some error occured.

2
No valid passphrase was provided.

3
The operation was canceled by the user.

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