gpgv(1) gpgv(1)
NAME
gpgv — signature verification tool
SYNOPSIS
gpgv [options] [signed files]
DESCRIPTION
gpgv is the OpenPGP signature checking tool.
This program is a stripped down version of gpg which is able only 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 trustworthy. There are no options files and
only very few options are implemented.
gpgv assumes that all keys in the keyring are trustworthy. By default
it uses a keyring named trustedkeys.gpg which is assumed to be in the
home directory as defined by GnuPG or set by an option or an environ-
ment variable. An option may be used to specify another keyring or
even multiple keyrings.
OPTIONS
gpgv recognizes these options:
-v, --verbose
Gives more information during processing. If used twice, the
input data is listed in detail.
-q, --quiet
Try to be as quiet as possible.
--keyring file
Add file to the list of keyrings. If file begins with a
tilde and a slash, these are replaced by the HOME directory.
If the filename does not contain a slash, it is assumed to be
in the home-directory ("~/.gnupg" if --homedir is not used).
The filename may be prefixed with a scheme:
"gnupg-ring:" is the default one.
--homedir directory
Set the name of the home directory to directory If this
option is not used, it defaults to "~/.gnupg". It does not
make sense to use this in an options file. This also over-
rides the environment variable "GNUPGHOME".
--status-fd n
Write special status strings to the file descriptor n. See
the file DETAILS in the documentation for a listing of them.
--logger-fd n
Write log output to file descriptor n and not to stderr.
--ignore-time-conflict
GnuPG normally checks that the timestamps associated with
keys and signatures have plausible values. However, some-
times a signature seems to be older than the key due to clock
problems. This option makes these checks just warnings.
RETURN VALUE
The program returns 0 if everything was fine, 1 if at least one signa-
ture was bad, and other error codes for fatal errors.
EXAMPLES
gpgv pgpfile
gpgv sigfile [files]
Verify the signature of the file. The second form is used for
detached signatures, where sigfile is the detached signature
(either ASCII armored or binary) and [files] are the signed
data; if this is not given the name of the file holding the
signed data is constructed by cutting off the extension
(".asc", ".sig" or ".sign") from sigfile.
ENVIRONMENT
HOME Used to locate the default home directory.
GNUPGHOME If set directory used instead of "~/.gnupg".
FILES
~/.gnupg/trustedkeys.gpg
The default keyring with the allowed keys
gpgv(1)
