gpgv(1) - f14

1GPGV(1)                        GNU Privacy Guard                       GPGV(1)
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NAME

6       gpgv - Verify OpenPGP signatures
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SYNOPSIS

9       gpgv [options] signed_files
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DESCRIPTION

16       gpgv is an OpenPGP signature verification tool.
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18       This  program  is actually a stripped-down version of gpg which is only
19       able to check signatures. It is somewhat smaller than  the  fully-blown
20       gpg  and  uses  a  different (and simpler) way to check that the public
21       keys used to make the signature are valid. There are  no  configuration
22       files and only a few options are implemented.
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24       gpgv  assumes that all keys in the keyring are trustworthy.  By default
25       it uses a keyring named `trustedkeys.gpg' which is assumed to be in the
26       home  directory  as defined by GnuPG or set by an option or an environ‐
27       ment variable. An option may be used to specify another keyring or even
28       multiple keyrings.
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RETURN VALUE

33       The  program  returns 0 if everything is fine, 1 if at least one signa‐
34       ture was bad, and other error codes for fatal errors.
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OPTIONS

38       gpgv recognizes these options:
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42       --verbose
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44       -v     Gives more information during processing.  If  used  twice,  the
45              input data is listed in detail.
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48       --quiet
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50       -q     Try to be as quiet as possible.
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53       --keyring file
54              Add  file  to the list of keyrings.  If file begins with a tilde
55              and a slash, these are replaced by the HOME  directory.  If  the
56              filename  does  not  contain a slash, it is assumed to be in the
57              home-directory ("~/.gnupg" if --homedir is not used).
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60       --status-fd n
61              Write special status strings to the file descriptor n.  See  the
62              file DETAILS in the documentation for a listing of them.
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65       --logger-fd n
66              Write log output to file descriptor n and not to stderr.
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69       --ignore-time-conflict
70              GnuPG  normally  checks that the timestamps associated with keys
71              and signatures have plausible values. However, sometimes a  sig‐
72              nature  seems  to  be  older than the key due to clock problems.
73              This option turns these checks into warnings.
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76       --homedir dir
77              Set the name of the home directory to dir. If this option is not
78              used,  the  home  directory  defaults to `~/.gnupg'.  It is only
79              recognized when given on the command line.   It  also  overrides
80              any  home  directory  stated  through  the  environment variable
81              `GNUPGHOME' or (on W32 systems) by means of the  Registry  entry
82              HKCU\Software\GNU\GnuPG:HomeDir.
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EXAMPLES

88       gpgv pgpfile
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90       gpgv sigfile [datafile]
91              Verify  the  signature  of the file. The second form is used for
92              detached signatures, where sigfile  is  the  detached  signature
93              (either  ASCII-armored  or  binary)  and  datafile  contains the
94              signed data; if datafile is "-" the signed data is  expected  on
95              stdin; if datafile is not given the name of the file holding the
96              signed data is constructed by cutting off the extension (".asc",
97              ".sig" or ".sign") from sigfile.
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FILES

102       ~/.gnupg/trustedkeys.gpg
103              The default keyring with the allowed keys.
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ENVIRONMENT

108       HOME   Used to locate the default home directory.
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111       GNUPGHOME
112              If set directory used instead of "~/.gnupg".
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