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.\" ========================================================================
.\"
.IX Title "GPG 3"
.TH GPG 3 "2014-09-19" "perl v5.16.3" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
Crypt::GPG \- An Object Oriented Interface to GnuPG.
.SH "VERSION"
.IX Header "VERSION"
.Vb 2
\& $Revision: 1.64 $
\& $Date: 2007/04/02 13:34:25 $
.Ve
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&  use Crypt::GPG;
\&  my $gpg = new Crypt::GPG;
\&
\&  $gpg\->gpgbin(\*(Aq/usr/bin/gpg\*(Aq);      # The GnuPG executable.
\&  $gpg\->secretkey(\*(Aq0x2B59D29E\*(Aq);     # Set ID of default secret key.
\&  $gpg\->passphrase(\*(Aqjust testing\*(Aq);  # Set passphrase.
\&
\&  # Sign a message:
\&
\&  my $sign = $gpg\->sign(\*(Aqtesting again\*(Aq);
\&
\&  # Encrypt a message:
\&
\&  my @encrypted = $gpg\->encrypt (\*(Aqtop secret\*(Aq, \*(Aqtest@bar.com\*(Aq);
\&
\&  # Get message info:
\&
\&  my @recipients = $gpg\->msginfo($encrypted);
\&
\&  # Decrypt a message.
\&
\&  my ($plaintext, $signature) = $gpg\->verify($encrypted);
\&
\&  # Key generation:
\&
\&  $status = $gpg\->keygen 
\&    (\*(AqTest\*(Aq, \*(Aqtest@foo.com\*(Aq, \*(AqELG\-E\*(Aq, 2048, 0, \*(Aqtest passphrase\*(Aq);
\&  print while (<$status>); close $status;
\&
\&  # Key database manipulation:
\&
\&  $gpg\->addkey($key, @ids);
\&  @keys = $gpg\->keydb(@ids);
\&
\&  # Key manipulation:
\&
\&  $key = $keys[0];
\& 
\&  $gpg\->delkey($key);
\&  $gpg\->disablekey($key);
\&  $gpg\->enablekey($key);
\&  $gpg\->keypass($key, $oldpassphrase, $newpassphrase);
\&  $keystring = $gpg\->export($key);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The Crypt::GPG module provides access to the functionality of the
GnuPG (www.gnupg.org) encryption tool through an object oriented
interface.
.PP
It provides methods for encryption, decryption, signing, signature
verification, key generation, key certification, export and
import. Key-server access is on the todo list.
.PP
This release of the module may create compatibility issues with
previous versions. If you find any such problems, or any bugs or
documentation errors, please do report them to
crypt-gpg at neomailbox.com.
.SH "CONSTRUCTOR"
.IX Header "CONSTRUCTOR"
.IP "\fB\f(BInew()\fB\fR" 2
.IX Item "new()"
Creates and returns a new Crypt::GPG object.
.SH "DATA METHODS"
.IX Header "DATA METHODS"
.IP "\fBgpgbin($path)\fR" 2
.IX Item "gpgbin($path)"
Sets the \fB\s-1GPGBIN\s0\fR instance variable which gives the path to the GnuPG
binary.
.IP "\fBgpgopts($opts)\fR" 2
.IX Item "gpgopts($opts)"
Sets the \fB\s-1GPGOPTS\s0\fR instance variable which may be used to pass
additional options to the GnuPG binary. For proper functioning of this
module, it is advisable to always include '\-\-lock\-multiple' in the
\&\s-1GPGOPTS\s0 string.
.IP "\fBdelay($seconds)\fR" 2
.IX Item "delay($seconds)"
Sets the \fB\s-1DELAY\s0\fR instance variable. This is no longer necessary (nor
used) in the current version of the module, but remains so existing
scripts don't break.
.IP "\fBsecretkey($keyid)\fR" 2
.IX Item "secretkey($keyid)"
Sets the \fB\s-1SECRETKEY\s0\fR instance variable which may be a KeyID or a
username. This is the \s-1ID\s0 of the default key to use for signing.
.IP "\fBpassphrase($passphrase)\fR" 2
.IX Item "passphrase($passphrase)"
Sets the \fB\s-1PASSPHRASE\s0\fR instance variable, required for signing and
decryption.
.IP "\fBtext($boolean)\fR" 2
.IX Item "text($boolean)"
Sets the \fB\s-1TEXT\s0\fR instance variable. If set true, GnuPG will use
network-compatible line endings for proper cross-platform
compatibility and the plaintext will gain a newline at the end, if it
does not already have one.
.IP "\fBarmor($boolean)\fR" 2
.IX Item "armor($boolean)"
Sets the \fB\s-1ARMOR\s0\fR instance variable, controlling the \s-1ASCII\s0 armoring of
output. The default is to use ascii-armoring. The module has not been
tested with this option turned off, and most likely will not work if
you switch this off.
.IP "\fBdetach($boolean)\fR" 2
.IX Item "detach($boolean)"
Sets the \fB\s-1DETACH\s0\fR instance variable. If set true, the sign method
will produce detached signature certificates, else it won't. The
default is to produce detached signatures.
.IP "\fBencryptsafe($boolean)\fR" 2
.IX Item "encryptsafe($boolean)"
Sets the \fB\s-1ENCRYPTSAFE\s0\fR instance variable. If set true, encryption
will fail if trying to encrypt to a key which is not trusted. This is
the default. Turn this off if you want to encrypt to untrusted keys.
.IP "\fBversion($versionstring)\fR" 2
.IX Item "version($versionstring)"
Sets the \fB\s-1VERSION\s0\fR instance variable which can be used to change the
Version: string on the GnuPG output to whatever you like.
.IP "\fBcomment($commentstring)\fR" 2
.IX Item "comment($commentstring)"
Sets the \fB\s-1COMMENT\s0\fR instance variable which can be used to change the
Comment: string on the GnuPG output to whatever you like.
.IP "\fBnofork($flag)\fR" 2
.IX Item "nofork($flag)"
Sets the \fB\s-1NOFORK\s0\fR instance variable which if set to a true value will
cause \fIkeygen()\fR not to fork a separate process for key generation.
.IP "\fBdebug($boolean)\fR" 2
.IX Item "debug($boolean)"
Sets the \fB\s-1DEBUG\s0\fR instance variable which causes the raw output of
Crypt::GPG's interaction with the GnuPG binary to be dumped to
\&\s-1STDOUT.\s0 By default, debugging is off.
.SH "OBJECT METHODS"
.IX Header "OBJECT METHODS"
.IP "\fBsign(@message)\fR" 2
.IX Item "sign(@message)"
Signs \fB\f(CB@message\fB\fR with the secret key specified with \fB\f(BIsecretkey()\fB\fR
and returns the result as a string.
.IP "\fBdecrypt(\e@message, [\e@signature])\fR" 2
.IX Item "decrypt(@message, [@signature])"
This is just an alias for \fB\f(BIverify()\fB\fR
.IP "\fBverify(\e@message, [\e@signature])\fR" 2
.IX Item "verify(@message, [@signature])"
Decrypts and/or verifies the message in \fB\f(CB@message\fB\fR, optionally using
the detached signature in \fB\f(CB@signature\fB\fR, and returns a list whose
first element is plaintext message as a string. If the message was
signed, a Crypt::GPG::Signature object is returned as the second
element of the list.
.Sp
The Crypt::GPG::Signature object can be queried with the following
methods:
.Sp
.Vb 4
\&   $sig\->validity();    # \*(AqGOOD\*(Aq, \*(AqBAD\*(Aq, or \*(AqUNKNOWN\*(Aq
\&   $sig\->keyid();       # ID of signing key
\&   $sig\->time();        # Time the signature was made
\&   $sig\->trusted();     # Signature trust level
.Ve
.IP "\fBmsginfo(@ciphertext)\fR" 2
.IX Item "msginfo(@ciphertext)"
Returns a list of the recipient key IDs that \fB\f(CB@ciphertext\fB\fR is
encrypted to.
.ie n .IP "\fBencrypt($plaintext, \fB$keylist\fB, [\-sign] )\fR" 2
.el .IP "\fBencrypt($plaintext, \f(CB$keylist\fB, [\-sign] )\fR" 2
.IX Item "encrypt($plaintext, $keylist, [-sign] )"
Encrypts \fB\f(CB$plaintext\fB\fR with the public keys of the recipients listed
in \fB\f(CB$keylist\fB\fR and returns the result in a string, or \fBundef\fR if
there was an error while processing. Returns undef if any of the keys
are not found.
.Sp
Either \f(CW$plaintext\fR or \f(CW$keylist\fR may be specified as either an arrayref
or a simple scalar.
.Sp
If \f(CW$plaintext\fR is a an arrayref, it will be \fIjoin()\fRed without
newlines.
.Sp
If you want to encrypt to multiple recipients, you must use the
arrayref version of \f(CW$keylist\fR. A scalar \f(CW$keylist\fR works for only a
single key \s-1ID.\s0
.Sp
If the \-sign option is provided, the message will be signed before
encryption. The secret key and passphrase must be set for signing to
work. They can be set with the \fIsecretkey()\fR and \fIpassphrase()\fR methods.
.ie n .IP "\fBaddkey($key, \fB$pretend\fB, \f(BI@keyids\fB)\fR" 2
.el .IP "\fBaddkey($key, \f(CB$pretend\fB, \f(CB@keyids\fB)\fR" 2
.IX Item "addkey($key, $pretend, @keyids)"
Adds the keys given in \fB\f(CB$key\fB\fR to the user's key ring and returns a
list of Crypt::GPG::Key objects corresponding to the keys that were
added. \f(CW$key\fR may be a string or an array reference.
.Sp
If \fB\f(CB$pretend\fB\fR is true, it pretends to add the key and creates the key
object, but doesn't actually perform the key addition.
.Sp
Optionally, a list of key IDs may be specified. If a list of key IDs
is specified, only keys that match those IDs will be imported. The
rest will be ignored.
.IP "\fBexport($key)\fR" 2
.IX Item "export($key)"
Exports the key specified by the Crypt::GPG::Key object \fB\f(CB$key\fB\fR and
returns the result as a string.
.ie n .IP "\fBkeygen($name, \fB$email\fB, \f(BI$keytype\fB, \f(CB$keysize\fB, \f(CB$expire\fB, \f(CB$passphrase\fB)\fR" 2
.el .IP "\fBkeygen($name, \f(CB$email\fB, \f(CB$keytype\fB, \f(CB$keysize\fB, \f(CB$expire\fB, \f(CB$passphrase\fB)\fR" 2
.IX Item "keygen($name, $email, $keytype, $keysize, $expire, $passphrase)"
Creates a new keypair with the parameters specified. The only
supported \fB\f(CB$keytype\fB\fR currently is '\s-1ELG\-E\s0'. \fB\f(CB$keysize\fB\fR can be any of
1024, 2048, 3072 or 4096. Returns undef if there was an error,
otherwise returns a filehandle that reports the progress of the key
generation process similar to the way GnuPG does. The key generation
is not complete till you read an \s-1EOF\s0 from the returned filehandle.
.ie n .IP "\fBcertify($keyid, \fB$local\fB, \f(BI@uids\fB)\fR" 2
.el .IP "\fBcertify($keyid, \f(CB$local\fB, \f(CB@uids\fB)\fR" 2
.IX Item "certify($keyid, $local, @uids)"
Certifies to the authenticity of UIDs of the key with \s-1ID\s0 \f(CW$keyid\fR. If
\&\f(CW$local\fR is true, the certification will be non-exportable. The \f(CW@uids\fR
parameter should contain the list of UIDs to certify (the first \s-1UID\s0 of
a key is 0).
.IP "\fBkeydb(@keyids)\fR" 2
.IX Item "keydb(@keyids)"
Returns an array of Crypt::GPG::Key objects corresponding to the Key
IDs listed in \fB\f(CB@keyids\fB\fR. This method used to be called \fBkeyinfo\fR and
that is still an alias to this method.
.IP "\fBparsekeys(@keylist)\fR" 2
.IX Item "parsekeys(@keylist)"
Parses a raw GnuPG formatted key listing in \fB\f(CB@keylist\fB\fR and returns an
array of Crypt::GPG::Key objects.
.ie n .IP "\fBkeypass($key, \fB$oldpass\fB, \f(BI$newpass\fB)\fR" 2
.el .IP "\fBkeypass($key, \f(CB$oldpass\fB, \f(CB$newpass\fB)\fR" 2
.IX Item "keypass($key, $oldpass, $newpass)"
Change the passphrase for a key. Returns true if the passphrase change
succeeded, false if not, or undef if there was an error.
.IP "\fBdelkey($keyid)\fR" 2
.IX Item "delkey($keyid)"
Deletes the key specified by the Crypt::GPG::Key object \fB\f(CB$key\fB\fR from
the user's key ring. Returns undef if there was an error, or 1 if the
key was successfully deleted.
.IP "\fBdisablekey($keyid)\fR" 2
.IX Item "disablekey($keyid)"
Disables the key specified by the Crypt::GPG::Key object \fB\f(CB$key\fB\fR.
.IP "\fBenablekey($keyid)\fR" 2
.IX Item "enablekey($keyid)"
Enables the key specified by the Crypt::GPG::Key object \fB\f(CB$key\fB\fR.
.SH "Crypt::GPG::Signature"
.IX Header "Crypt::GPG::Signature"
.Vb 1
\&  Documentation coming soon.
.Ve
.SH "Crypt::GPG::Key"
.IX Header "Crypt::GPG::Key"
.Vb 1
\&  Documentation coming soon.
.Ve
.SH "TODO"
.IX Header "TODO"
.IP "\(bu" 2
Key server access.
.IP "\(bu" 2
More complete key manipulation interface.
.IP "\(bu" 2
Filehandle interface to handle large messages.
.SH "BUGS"
.IX Header "BUGS"
.IP "\(bu" 2
Error checking needs work.
.IP "\(bu" 2
Some key manipulation functions are missing.
.IP "\(bu" 2
The method call interface is subject to change in future versions.
.IP "\(bu" 2
The current implementation will probably eat up all your \s-1RAM\s0 if you
try to operate on huge messages. In future versions, this will be
addressed by reading from and returning filehandles, rather than using
in-core data.
.IP "\(bu" 2
Methods may break if you don't use \s-1ASCII\s0 armoring.
.SH "CHANGELOG"
.IX Header "CHANGELOG"
.RS 2
\&\f(CW$Log:\fR \s-1GPG\s0.pm,v $
.Sp
Revision 1.64  2014/09/18 12:21:25  ashish
.Sp
.Vb 1
\&  \- Applied Fix for RT 68339 (thanks to Todd Rinaldo)
.Ve
.Sp
Revision 1.63  2007/04/02 13:34:25  ashish
.Sp
.Vb 1
\&  \- Fixed a bug introduced by the changes in 1.62 wrt default signing key
.Ve
.Sp
Revision 1.62  2007/03/31 11:28:12  ashish
.Sp
.Vb 1
\&  \- Fixed debug()
\&
\&  \- Fixed regex for signature line
\&
\&  \- Non\-forking version of keygen() (thanks to Greg Hill)
\&
\&  \- Enabled use of default Key ID for signing
\&
\&  \- Allow for GPG returning 8 or 16 bit KeyIDs (thanks to Roberto Jimenoca)
\&
\&  \- Fixed tempfiles being left around after decrypt()
\&
\&  \- Changed exit() to CORE::exit() (suggested by Jonathan R. Baker)
.Ve
.Sp
Revision 1.61  2006/12/21 12:36:28  ashish
.Sp
.Vb 1
\&  \- Skip tests if gpg not found.
\&
\&  \- Use File::Spec to determine tmpdir. Suggested by Craig Manley.
.Ve
.Sp
Revision 1.59  2006/12/19 12:51:54  ashish
.Sp
.Vb 1
\&  \- Documentation fixes.
\&
\&  \- Removed tests for obsolete 768 bit keys.
\&
\&  \- Bugfixes.
\&
\&  \- Tested with gpg 1.4.6.
.Ve
.Sp
Revision 1.57  2005/12/15 17:09:17  ashish
.Sp
.Vb 1
\&  \- Fixed bug in decrypt
\&
\&  \- Fixed small key certification bugs.
.Ve
.Sp
Revision 1.50  2005/02/10 12:32:51  cvs
.Sp
.Vb 1
\& \- Overhauled to use IPC::Run instead of Expect.
\&
\& \- Test suite split up into multiple scripts.
.Ve
.Sp
Revision 1.42  2002/12/11 03:33:19  cvs
.Sp
.Vb 1
\& \- Fixed bug in certify() when trying to certify revoked a key.
\&
\& \- Applied dharris\ex40drh.net\*(Aqs patch to allow for varying date formats
\&   between gpg versions, and fix time parsing and the
\&   Crypt::GPG::Signature autoloaded accessor functions.
.Ve
.Sp
Revision 1.40  2002/09/23 23:01:53  cvs
.Sp
.Vb 1
\& \- Fixed a bug in keypass()
\&
\& \- Documentation fixes.
.Ve
.Sp
Revision 1.37  2002/09/21 02:37:49  cvs
.Sp
.Vb 1
\& \- Fixed signing option in encrypt.
.Ve
.Sp
Revision 1.36  2002/09/21 00:03:29  cvs
.Sp
.Vb 1
\& \- Added many tests and fixed a bunch of bugs.
.Ve
.Sp
Revision 1.34  2002/09/20 19:07:11  cvs
.Sp
.Vb 2
\& \- Extensively modified formatting to make the code easier to
\&   read. All lines are now < 80 chars.
\&
\& \- Removed all instances of invoking a shell.
\&
\& \- Misc. other stuff.
.Ve
.Sp
Revision 1.31  2002/09/20 16:38:45  cvs
.Sp
.Vb 3
\& \- Cleaned up export and addkey. Fixed(?) addkey clobbering trustdb
\&   problem (thanks to jrray\ex40spacemeat.com for the patch). Added
\&   support for signature verification on addkey pretend.
\&
\& \- No calls to POSIX::tmpnam remain (thanks to radek\ex40karnet.pl and
\&   jrray\ex40spacemeat.com for suggesting File::Temp).
.Ve
.Sp
Revision 1.30  2002/09/20 15:25:47  cvs
.Sp
.Vb 3
\& \- Fixed up tempfile handling and eliminated calls to the shell in
\&   encrypt(), sign() and msginfo(). Passing all currently defined
\&   tests. 
\&
\& \- Hopefully also fixed signing during encryption and verification of
\&   detached signatures. Not tested this yet.
.Ve
.Sp
Revision 1.29  2002/09/20 11:19:02  cvs
.Sp
.Vb 3
\& \- Removed hack to Version: string. Only the Comment: string in GPG
\&   output is now modified by Crypt::GPG. (Thanks to
\&   eisen\ex40schlund.de for pointing out the bug here)
\&
\& \- Removed code that incorrectly replaced \*(AqPGP MESSAGE\*(Aq with \*(AqPGP
\&   SIGNATURE\*(Aq on detached signatures. (Thanks to ddcc\ex40mit.edu for
\&   pointing this out).
\&
\& \- Fixed up addkey() to properly handle pretend mode and to
\&   selectively import only requested key IDs from a key block.
\&
\& \- parsekeys() now also figures out which keyring a key belongs to.
\&
\& \- Added certify() method, to enable certifying keys.
\&
\& \- Added Crypt::GPG::Signature methods \- validity(), keyid(), time()
\&   and trusted().
.Ve
.RE
.SH "AUTHOR"
.IX Header "AUTHOR"
Crypt::GPG is Copyright (c) 2000\-2007 Ashish Gulhati
<crypt\-gpg at neomailbox.com>. All Rights Reserved.
.SH "ACKNOWLEDGEMENTS"
.IX Header "ACKNOWLEDGEMENTS"
Thanks to Barkha, for inspiration; to the GnuPG team; and to everyone
who writes free software.
.SH "LICENSE"
.IX Header "LICENSE"
This code is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
.SH "BUGS REPORTS, PATCHES, FEATURE REQUESTS"
.IX Header "BUGS REPORTS, PATCHES, FEATURE REQUESTS"
Are very welcome. Email crypt-gpg at neomailbox.com.