gpgv



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 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.


OPTIONS

       gpgv 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.

       --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 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 a warning.


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)

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