gpgv(1)gpgv(1)NAMEgpgv-- signature verification tool
SYNOPSISgpgv [options] [signed files]
DESCRIPTIONgpgv 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 environment variable. An option
may be used to specify another keyring or even multiple
keyrings.
OPTIONSgpgv recognizes these options:
-v, --verbose
Give 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.
It might make sense to use it together with
--no-default-keyring.
--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 a options file. This also overrides the envi-
ronment variable "GNUPGHOME".
--status-fd n
Write special status strings to the file
descriptor n. See the file DETAILS in the docu-
mentation 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 asso-
ciated with keys and signatures have plausible
values. However, sometimes a signature seems to
be older than the key due to clock problems.
This option makes these checks just a warning.
RETURN VALUE
The program returns 0 if everything was fine, 1 if at
least one signature was bad, and other error codes for
fatal errors.
EXAMPLESgpgv pgpfile
gpgv sigfile [files]
Verify the signature of the file. The second
form is used for detached signatures, where sig-
file 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 cut-
ting 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)
