gpgv [options] signed_files
gpgv is an OpenPGP signature verification tool.
This program is actually a stripped-down version of gpg which is only able to check signatures. It is somewhat smaller than the fully-blown gpg and uses a different (and simpler) way to check that the public keys used to make the signature are valid. There are no configuration files and only a few options are implemented.
gpgv assumes that all keys in the keyring are trustworthy. That does also mean that it does not check for expired or revoked keys.
By default a keyring named 'trustedkeys.kbx' is used; if that does not exist a keyring named 'trustedkeys.gpg' is used. The default keyring is assumed to be in the home directory of GnuPG, either the default home directory or the one set by an option or an environment variable. The option --keyring may be used to specify a different keyring or even multiple keyrings.
The program returns 0 if everything is fine, 1 if at least one signature was bad, and other error codes for fatal errors.
gpgv recognizes these options:
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/gnupg' for internal cache files.
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.