NAME¶
gpgv - Verify OpenPGP signatures
SYNOPSIS¶
gpgv [
options]
signed_files
DESCRIPTION¶
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. 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
environment variable. An option may be used to specify another keyring or even
multiple keyrings.
RETURN VALUE¶
The program returns 0 if everything is fine, 1 if at least one signature was
bad, and other error codes for fatal errors.
OPTIONS¶
gpgv recognizes these options:
- --verbose
- -v
- Gives more information during processing. If used twice,
the input data is listed in detail.
- --quiet
- -q
- 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).
- --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, sometimes a signature
seems to be older than the key due to clock problems. This option turns
these checks into warnings.
- --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 W32 systems) by means of
the Registry entry HKCU\Software\GNU\GnuPG:HomeDir.
EXAMPLES¶
- gpgv pgpfile
- gpgv sigfile [datafile]
- 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 datafile contains the signed
data; if datafile is "-" the signed data is expected on
stdin; if datafile 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.
FILES¶
- ~/.gnupg/trustedkeys.gpg
- The default keyring with the allowed keys.
ENVIRONMENT¶
- HOME
- Used to locate the default home directory.
- GNUPGHOME
- If set directory used instead of "~/.gnupg".
SEE ALSO¶
gpg2(1)
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.