gnupg::signature(3pm) [debian man page]

GnuPG::Signature(3pm)					User Contributed Perl Documentation				     GnuPG::Signature(3pm)

NAME

       GnuPG::Signature - GnuPG Key Signature Objects

SYNOPSIS

	 # assumes a GnuPG::Key or GnuPG::UserID or GnuPG::UserAttribute object in $signed
	 my $signing_id = $signed->signatures->[0]->hex_id();

DESCRIPTION

       GnuPG::Signature objects are generally not instantiated on their own, but rather as part of GnuPG::Key objects.	They embody various
       aspects of a GnuPG signature on a key.

OBJECT METHODS

       new( %initialization_args )
	   This methods creates a new object.  The optional arguments are initialization of data members.

       is_valid()
	   Returns 1 if GnuPG was able to cryptographically verify the signature, otherwise 0.

       compare( $other )
	   Returns non-zero only when this Signature is identical to the other GnuPG::Signature.

OBJECT DATA MEMBERS

       validity
	   A character indicating the cryptographic validity of the key.  GnuPG uses at least the following characters: "!" means valid, "-" means
	   not valid, "?" means unknown (e.g. if the supposed signing key is not present in the local keyring), and "%" means an error occurred
	   (e.g. a non-supported algorithm).  See the documentation for --check-sigs in gpg(1).

       algo_num
	   The number of the algorithm used for the signature.

       hex_id
	   The hex id of the signing key.

       user_id_string
	   The first user id string on the key that made the signature.  This may not be defined if the signing key is not on the local keyring.

       sig_class
	   Signature class.  This is the numeric value of the class of signature.

	   A table of possible classes of signatures and their numeric types can be found at http://tools.ietf.org/html/rfc4880#section-5.2.1

       is_exportable
	   returns 0 for local-only signatures, non-zero for exportable signatures.

       date_string
	   The formatted date the signature was performed on.

       date
	   The date the signature was performed, represented as the number of seconds since midnight 1970-01-01 UTC.

       expiration_date_string
	   The formatted date the signature will expire (signatures without expiration return undef).

       expiration_date
	   The date the signature will expire, represented as the number of seconds since midnight 1970-01-01 UTC (signatures without expiration
	   return undef)

SEE ALSO

perl v5.12.4							    2010-05-10						     GnuPG::Signature(3pm)

GPGV(1) 							 GNU Privacy Guard							   GPGV(1)

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 file-
	      name 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 recog-
	      nized 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 HKCUSoftwareGNUGnuPG: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

	 info gnupg

       should give you access to the complete manual including a menu structure and an index.

GnuPG 1.4.11							    2013-01-08								   GPGV(1)