gpgv(1) - c6

1GPGV2(1)                       GNU Privacy Guard                      GPGV2(1)
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NAME

6       gpgv2 - Verify OpenPGP signatures
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SYNOPSIS

9       gpgv2 [options] signed_files
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DESCRIPTION

15       gpgv2 is an OpenPGP signature verification tool.
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17       This  program  is actually a stripped-down version of gpg which is only
18       able to check signatures. It is somewhat smaller than  the  fully-blown
19       gpg  and  uses  a  different (and simpler) way to check that the public
20       keys used to make the signature are valid. There are  no  configuration
21       files and only a few options are implemented.
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23       gpgv2 assumes that all keys in the keyring are trustworthy.  By default
24       it uses a keyring named ‘trustedkeys.gpg’ which is assumed to be in the
25       home  directory  as defined by GnuPG or set by an option or an environ‐
26       ment variable. An option may be used to specify another keyring or even
27       multiple keyrings.
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RETURN VALUE

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

37       gpgv2 recognizes these options:
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41       --verbose
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43       -v     Gives more information during processing.  If  used  twice,  the
44              input data is listed in detail.
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47       --quiet
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49       -q     Try to be as quiet as possible.
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52       --keyring file
53              Add  file  to the list of keyrings.  If file begins with a tilde
54              and a slash, these are replaced by the HOME  directory.  If  the
55              filename  does  not  contain a slash, it is assumed to be in the
56              home-directory ("~/.gnupg" if --homedir is not used).
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59       --status-fd n
60              Write special status strings to the file descriptor n.  See  the
61              file DETAILS in the documentation for a listing of them.
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64       --logger-fd n
65              Write log output to file descriptor n and not to stderr.
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68       --ignore-time-conflict
69              GnuPG  normally  checks that the timestamps associated with keys
70              and signatures have plausible values. However, sometimes a  sig‐
71              nature  seems  to  be  older than the key due to clock problems.
72              This option turns these checks into warnings.
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75       --homedir dir
76              Set the name of the home directory to dir. If this option is not
77              used,  the  home  directory  defaults to ‘~/.gnupg’.  It is only
78              recognized when given on the command line.   It  also  overrides
79              any  home  directory  stated  through  the  environment variable
80              ‘GNUPGHOME’ or (on W32 systems) by means of the  Registry  entry
81              HKCU\Software\GNU\GnuPG:HomeDir.
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EXAMPLES

87       gpgv2 pgpfile
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89       gpgv2 sigfile [datafile]
90              Verify  the  signature  of the file. The second form is used for
91              detached signatures, where sigfile  is  the  detached  signature
92              (either  ASCII-armored  or  binary)  and  datafile  contains the
93              signed data; if datafile is "-" the signed data is  expected  on
94              stdin; if datafile is not given the name of the file holding the
95              signed data is constructed by cutting off the extension (".asc",
96              ".sig" or ".sign") from sigfile.
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FILES

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

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