gpgv — signature verification tool
gpgv [options] [signed files]
gpgv is the OpenPGP signature checking tool.
This program is a stripped down version of gpg which is only able to
check signatures. It is somewhat smaller than the full blown gpg and
uses a different (and more simple way) to check that the public keys
used to made the signature are trustworth. There is no options files
and only very few options are implemented.
gpgv assumes that all keys in the keyring are trustworty. It uses by
default 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.
gpgv recognizes these options:
Give more information during processing. If used twice, the
input data is listed in detail.
Try to be as quiet as possible.
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.
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 a options file. This also overrides
the environment variable "GNUPGHOME".
Write special status strings to the file descriptor n. See
the file DETAILS in the documentation for a listing of them.
Write log output to file descriptor n and not to stderr.
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 a warning.
The program returns 0 if everything was fine, 1 if at least one signa-
ture was bad, and other error codes for fatal errors.
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.
HOME Used to locate the default home directory.
GNUPGHOME If set directory used instead of "~/.gnupg".
The default keyring with the allowed keys
Man(1) output converted with