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Werner Koch 7777e68d04 Implement unattended OpenPGP secret key import. 
* agent/command.c (cmd_import_key): Add option --unattended.
* agent/cvt-openpgp.c (convert_transfer_key): New.
(do_unprotect): Factor some code out to ...
(prepare_unprotect): new function.
(convert_from_openpgp): Factor all code out to ...
(convert_from_openpgp_main): this.  Add arg 'passphrase'.  Implement
openpgp-native protection modes.
(convert_from_openpgp_native): New.
* agent/t-protect.c (convert_from_openpgp_native): New dummy fucntion
* agent/protect-tool.c (convert_from_openpgp_native): Ditto.
* agent/protect.c (agent_unprotect): Add arg CTRL.  Adjust all
callers.  Support openpgp-native protection.
* g10/call-agent.c (agent_import_key): Add arg 'unattended'.
* g10/import.c (transfer_secret_keys): Use unattended in batch mode.
--

With the gpg-agent taking care of the secret keys, the user needs to
migrate existing keys from secring.gpg to the agent.  This and also
the standard import of secret keys required the user to unprotect the
secret keys first, so that gpg-agent was able to re-protected them
using its own scheme.  With many secret keys this is quite some
usability hurdle.  In particular if a passphrase is not instantly
available.

To make this migration smoother, this patch implements an unattended
key import/migration which delays the conversion to the gpg-agent
format until the key is actually used.  For example:

   gpg2 --batch --import mysecretkey.gpg

works without any user interaction due to the use of --batch.  Now if
a key is used (e.g. "gpg2 -su USERID_FROM_MYSECRETKEY foo"), gpg-agent
has to ask for the passphrase anyway, converts the key from the
openpgp format to the internal format, signs, re-encrypts the key and
tries to store it in the gpg-agent format to the disk.  The next time,
the internal format of the key is used.

This patch has only been tested with the old demo keys, more tests
with other protection formats and no protection are needed.

Signed-off-by: Werner Koch <wk@gnupg.org>
2013-05-22 10:14:57 +02:00

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The GNU Privacy Guard 2
=========================
Version 2.1
THIS IS A DEVELOPMENT VERSION AND NOT INTENDED FOR REGULAR USE.
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
2006, 2007, 2008, 2009, 2010, 2011, 2012,
2013 Free Software Foundation, Inc.
INTRODUCTION
============
GnuPG is GNU's tool for secure communication and data storage. It can
be used to encrypt data and to create digital signatures. It includes
an advanced key management facility and is compliant with the proposed
OpenPGP Internet standard as described in RFC4880 and the S/MIME
standard as described by several RFCs.
GnuPG is distributed under the terms of the GNU General Public
License. See the file COPYING for details. GnuPG works best on
GNU/Linux or *BSD systems. Most other Unices are also supported but
are not as well tested as the Free Unices.
GnuPG 2.0 is the stable version of GnuPG integrating support for
OpenPGP and S/MIME. It does not conflict with an installed 1.4
OpenPGP-only version.
BUILD INSTRUCTIONS
==================
GnuPG 2.1 depends on the following packages:
npth (ftp://ftp.gnupg.org/gcrypt/npth/)
libgpg-error (ftp://ftp.gnupg.org/gcrypt/libgpg-error/)
libgcrypt (ftp://ftp.gnupg.org/gcrypt/libgcrypt/)
libksba (ftp://ftp.gnupg.org/gcrypt/libksba/)
libassuan (ftp://ftp.gnupg.org/gcrypt/libassuan/)
You should get the latest versions of course, the GnuPG configure
script complains if a version is not sufficient.
You also need the Pinentry package for most functions of GnuPG;
however it is not a build requirement. Pinentry is available at
ftp://ftp.gnupg.org/gcrypt/pinentry/ .
After building and installing the above packages in the order as given
above, you may continue with GnuPG installation (you may also just try
to build GnuPG to see whether your already installed versions are
sufficient).
As with all packages, you just have to do
./configure
make
make install
(Before doing install you might need to become root.)
If everything succeeds, you have a working GnuPG with support for
S/MIME and smartcards. Note that there is no binary gpg but a gpg2 so
that this package won't conflict with a GnuPG 1.4 installation. gpg2
behaves just like gpg.
In case of problem please ask on gnupg-users@gnupg.org mailing list
for advise.
Note that the PKITS tests are always skipped unless you copy the PKITS
test data file into the tests/pkits directory. There is no need to
run these test and some of them may even fail because the test scripts
are not yet complete.
You may run
gpgconf --list-dirs
to view the default directories used by GnuPG.
MIGRATION FROM 1.4 or 2.0 to 2.1
================================
The major change in 2.1 is gpg-agent taking care of the OpenPGP secret
keys (those managed by GPG). The former file "secring.gpg" will not
be used anymore. Newly generated keys are stored in the agent's key
store directory "~/.gnupg/private-keys-v1.d/".
To migrate your existing keys you need to run the command
gpg2 --batch --import ~/.gnupg/secring.gpg
Secret keys already imported are skipped by this command. It is
advisable to keep the secring.gpg for use with older versions of GPG.
The use of "--batch" with "--import" is highly recommended. If you do
not use "--batch" the agent would ask for the passphrase of each key.
In this case you may use the Cancel button of the Pinentry to skip
importing this key. If you want to stop the enite import process and
you use a decent version of Pinentry, you should close the Pinentry
window instead of hitting the Cancel button.
Note that gpg-agent now uses a fixed socket by default. All tools
will start the gpg-agent as needed. In general there is no more need
to set the GPG_AGENT_INFO environment variable. The SSH_AUTH_SOCK
environment variable should be set to a fixed value.
GPG's smartcard commands --card-edit and --card-status as well as some
of the card related sub-commands of --edit-key are not yet fully
supported. However, signing and decryption with a smartcard does
work.
The Dirmngr is now part of GnuPG proper. Thus there is no more need
to install the separate dirmngr package. The directroy layout of
Dirmngr changed to make use of the GnuPG directories; for example you
use /etc/gnupg/trusted-certs and /var/lib/gnupg/extra-certs. Dirmngr
needs to be started as a system daemon.
DOCUMENTATION
=============
The complete documentation is in the texinfo manual named
`gnupg.info'. Run "info gnupg" to read it. If you want a a printable
copy of the manual, change to the "doc" directory and enter "make pdf"
For a HTML version enter "make html" and point your browser to
gnupg.html/index.html. Standard man pages for all components are
provided as well. An online version of the manual is available at
http://www.gnupg.org/documentation/manuals/gnupg/ . A version of the
manual pertaining to the current development snapshot is at
http://www.gnupg.org/documentation/manuals/gnupg-devel/ .
GNUPG 1.4 AND GNUPG 2.0
=======================
GnuPG 2.0 is a newer version of GnuPG with additional support for
S/MIME. It has a different design philosophy that splits
functionality up into several modules. Both versions may be installed
simultaneously without any conflict (gpg is called gpg2 in GnuPG 2).
In fact, the gpg version from GnuPG 1.4 is able to make use of the
gpg-agent as included in GnuPG 2 and allows for seamless passphrase
caching. The advantage of GnuPG 1.4 is its smaller size and no
dependency on other modules at run and build time.
HOW TO GET MORE INFORMATION
===========================
The primary WWW page is "http://www.gnupg.org"
The primary FTP site is "ftp://ftp.gnupg.org/gcrypt/"
See http://www.gnupg.org/download/mirrors.html for a list of mirrors
and use them if possible. You may also find GnuPG mirrored on some of
the regular GNU mirrors.
We have some mailing lists dedicated to GnuPG:
gnupg-announce@gnupg.org For important announcements like new
versions and such stuff. This is a
moderated list and has very low traffic.
Do not post to this list.
gnupg-users@gnupg.org For general user discussion and
help (English).
gnupg-de@gnupg.org German speaking counterpart of
gnupg-users.
gnupg-ru@gnupg.org Russian speaking counterpart of
gnupg-users.
gnupg-devel@gnupg.org GnuPG developers main forum.
You subscribe to one of the list by sending mail with a subject of
"subscribe" to x-request@gnupg.org, where x is the name of the mailing
list (gnupg-announce, gnupg-users, etc.). An archive of the mailing
lists are available at http://www.gnupg.org/documentation/mailing-lists.html
Please direct bug reports to http://bugs.gnupg.org or post them direct
to the mailing list <gnupg-devel@gnupg.org>.
Please direct questions about GnuPG to the users mailing list or one
of the pgp newsgroups; please do not direct questions to one of the
authors directly as we are busy working on improvements and bug fixes.
The English and German mailing lists are watched by the authors and we
try to answer questions when time allows us to do so.
Commercial grade support for GnuPG is available; for a listing of
offers see http://www.gnupg.org/service.html . The driving force
behind the development of GnuPG is the company of its principal
author, Werner Koch. Maintenance and improvement of GnuPG and related
software takes up most of their resources. To allow him to continue
his work he asks to either purchase a support contract, engage them
for custom enhancements, or to donate money. See http://g10code.com .
This file is Free Software; as a special exception the authors gives
unlimited permission to copy and/or distribute it, with or without
modifications, as long as this notice is preserved. For conditions
of the whole package, please see the file COPYING. This file is
distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY, to the extent permitted by law; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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