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796 Commits

Author SHA1 Message Date
Werner Koch
f05a32e5c9
scd:nks: Allow retrieving certificates from a Signature Card v.20
* scd/app-nks.c: Major rework to support non-RSA cards.
--

This is a fist step so support this ECC card.  The code has been
reworked while taking care that old cards should keep on working.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-17 16:09:58 +02:00
Werner Koch
3633ca6e21
scd: Detect missing card in "getinfo all_active_apps".
* scd/app.c (send_card_and_app_list): Detect no app case.
--

This is a minor nug fix to return a better error message.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-17 16:09:54 +02:00
Werner Koch
bfedc760ef
scd:p15: Return a display S/N via Assuan.
* scd/app-p15.c (make_pin_prompt): Factor some code out to ...
(get_dispserialno): this.
(do_getattr): Use new fucntion for a $DISPSERIALNO.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-09 12:20:18 +02:00
Werner Koch
9ec8d984be
scd:p15: Show a pretty PIN prompt.
* scd/app-p15.c (struct prkdf_object_s): New fields common_name and
serial_number.
(release_prkdflist): Free them.
(keygrip_from_prkdf): Parse cert and set them.
(any_control_or_space): New.
(make_pin_prompt): New.
(verify_pin): Construct a pretty PIN prompt.
(do_sign): Remove debug output.
--

The D-Trust card has the SerialNumber part of the Subject printed on
the front matter, we assume this is also possible with other cards and
thus we show this as serial number.

The holder of the card is also extracted from the card's subject.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-07 20:38:15 +02:00
Werner Koch
f28795b615
scd: Return GPG_ERR_BAD_PIN on 0x63Cn status word.
* scd/iso7816.c (map_sw): Detect 0x63Cn status code.
--

I really wonder when that got lost and we ended up with a simple card
error.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-07 19:09:27 +02:00
Werner Koch
60d018f6a9
scd: Factor common PIN status check out.
* scd/iso7816.h (ISO7816_VERIFY_ERROR): New.
(ISO7816_VERIFY_NO_PIN): New.
(ISO7816_VERIFY_BLOCKED): New.
(ISO7816_VERIFY_NULLPIN): New.
(ISO7816_VERIFY_NOT_NEEDED): New.
* scd/iso7816.c (iso7816_verify_status): New.
* scd/app-nks.c (get_chv_status): Use new function.
* scd/app-piv.c (get_chv_status): Ditto.
(verify_chv): Ditto.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-07 18:26:00 +02:00
Werner Koch
42ddcc87f4
scd:p15: Fix decrypt followed by sign problem for D-Trust cards.
* scd/iso7816.c (iso7816_select_mf): New.
* scd/app-p15.c (card_product_t): New.
(struct app_local_s): Add field 'card_product'.
(read_ef_tokeninfo): Detect D-Trust card.
(prepare_verify_pin): Switch to D-Trust AID.
(do_decipher): Restore a SE for D-TRust cards.  Chnage the passing
indicator to 0x81.
--

Using what I learned from a USB trace running the Governikus Signer
Software on Windows this fixes the left over problem with the new
D-Trust card support.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-07 16:03:11 +02:00
Werner Koch
aa60645b99
scd:p15: Emit MANUFACTURER, $ENCRKEYID, $SIGNKEYID.
* scd/app-p15.c (read_ef_tokeninfo): Store manufacturer_id.
(do_getattr): Implement MANUFACTURER, $ENCRKEYID and $SIGNKEYID.
(send_keypairinfo): Also print usage flags.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-03 11:21:32 +02:00
Werner Koch
541a6a903e
scd:openpgp: New attribute "MANUFACTURER".
* scd/app-openpgp.c (get_manufacturer): New..
(do_getattr): Add new attribute "MANUFACTURER".
(do_learn_status): Always print it.
--

This will make it easy to maintain the list of OpenPGP vendors at just
one place.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-03 09:56:56 +02:00
Werner Koch
61c5b0767f
scd:p15: Implement do_with_keygrip and capabilities.
* scd/app-p15.c (prepare_verify_pin): Allow use without an AODF.
(verify_pin): Ditto.
(do_with_keygrip): Implement capability restrictions.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-02 14:23:26 +02:00
Werner Koch
8149742ddf
scd:p15: Rename some variables and functions for clarity.
* scd/app-p15.c: Rename keyinfo to prkdf.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-02 12:40:09 +02:00
Werner Koch
5b7b42e2b2
scd: Use Gcrypt usage constants for the do_with_keygrip capabilities.
* scd/command.c (cmd_keyinfo): Use Gcrypt constants for CAP.
* scd/app-openpgp.c (do_with_keygrip): Adjust for them.
* scd/app-piv.c (do_with_keygrip): Ditto.
--

That makes it easier to read.  An open question is whether we should
allow several capabilities and whether they are the ORed or ANDed.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-02 11:54:01 +02:00
NIIBE Yutaka
2ccbcfec12 scd: New command DEVINFO.
* scd/app.c (notify_cond): New condition variable.
(app_send_devinfo, app_wait): New.
(scd_update_reader_status_file): Kick NOTIFY_COND.
(initialize_module_command): Initialize NOTIFY_COND.
* scd/command.c (struct server_local_s):  Add watching_status.
(cmd_devinfo): New.
(register_commands): Add DEVINFO command.
(send_client_notifications): Write status change to DEVINFO channel.
* scd/scdaemon.h (app_wait, app_send_devinfo): New.

GnuPG-bug-id: 4864
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-04-02 15:39:26 +09:00
Werner Koch
29f8f52bf8
scd:p15: Cache the PIN.
* scd/app-p15.c (struct prkdf_object_s): Add flag pin_verified.
(verify_pin): Make use of it.
--

Theee is still a problem with the APDUs we send: Switching between
signing and decryption does work but not in the other way.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 20:31:21 +02:00
Werner Koch
132d82c158
scd:p15: Run a keygrip_from_prkdf before verify_pin
* scd/app-p15.c (do_sign): Move keygrip_from_prkdf before PIN
verification.
(do_decipher): Add keygrip_from_prkdf.
--

This is required because that function may change the current file
which is set by prepare_verify_pin right before MSE.  HAs alredy been
done on the backport to 2.2

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 17:49:14 +02:00
Werner Koch
ca4391399c
scd:p15: Support decryption with CardOS 5 cards.
* scd/app-p15.c (do_decipher): New.
--

tested using the D-TRUSt card and a SCR3310 reader.  The Kobil KAAN
Advanced, I used for the signing tests could not be used because it
supports only Short APDU Level exchange.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 14:07:56 +02:00
Werner Koch
375b145487
scd:p15: Factor PIN verification out to a new function.
* scd/app-p15.c (do_sign): Factor code out to ...
(prepare_verify_pin, verify_pin): new functions.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 11:58:08 +02:00
Werner Koch
103c1576b7
scd:p15: Support signing with CardOS 5 cards.
* scd/app-help.c (app_help_get_keygrip_string_pk): Add optional arg
r_pkey and change all callers.
(app_help_get_keygrip_string): Ditto.
* scd/app-p15.c (struct cdf_object_s): Use bit flags
(struct aodf_object_s): Ditto.  Add field 'fid'.
(struct prkdf_object_s): Ditto.  Add fields keygrip, keyalgo, and
keynbits.
(parse_certid): Allow a keygrip instead of a certid aka keyref.
(read_ef_aodf): Store the FID.
(keygripstr_from_prkdf): Rename to ...
(keygrip_from_prkdf): this.  Remove arg r_gripstr and implement cache.
Change callers to directly use the values from the object.  Also store
the algo and length of the key ion the object.
(keyref_from_keyinfo): New. Factored out code.
(do_sign): Support SHA-256 and >2048 bit RSA keys.
(do_with_keygrip): New.
(app_select_p15): Register new function.
--

This has been tested with a D-Trust card featuring 3072 bit keys.
Note that non-repudiation key for a qualified signature does not yet
work because we do not yet support rsaPSS padding.  Thus a gpgsm
--learn shows a couple of Bad Signature errors for this key.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-31 19:55:15 +02:00
Werner Koch
2bdd4fc7b6
scd:p15: Read certificates in extended mode.
* scd/app-p15.c (readcert_by_cdf): Allow reading in extended mode.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-31 11:57:19 +02:00
Werner Koch
c9ad81070a
scd: Add function for binary read in extended mode.
* scd/iso7816.c (iso7816_read_binary): Factor code out to ...
(iso7816_read_binary_ext): new function.  Add arg extended_mode.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-31 11:53:36 +02:00
Werner Koch
c29603fa9a
scd:p15: Improve diagnostics
--

This removes almost all log_debug calls and uses opt.verbose and
log_info to show card information.  Also avoid too long and thus
harder to read lines.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-31 11:20:59 +02:00
Werner Koch
8a68d497f1
scd:p15: Detect CardOS 5 cards and print some basic infos.
* scd/app-p15.c (read_ef_odf): Detect the home_DF on the fly.  Silence
the garbage warning for null bytes.
(print_tokeninfo_tokenflags): New.
(read_ef_tokeninfo): Print manufacturer, label, and flags.
(app_select_p15): No need to use the app_get_slot macro.
(CARD_TYPE_CARDOS_50): New const.
(card_atr_list): Detect CardOS 5.0
--

The card under test is a "Test-Signaturkarte D-TRUST Card 3.1" for a
mere 49 Euro and no specs available.  D-Trust is a branch of the
German Bundesdruckerei.  Compare that to Telesec and Yubikey who have
always been nice enough to send bunches of sample cards without a need
to wade through lots of forms and not even asking for money.  Guess
which cards I prefer.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-30 21:19:24 +02:00
Werner Koch
4c4999b818
scd:openpgp: Allow PKSIGN with keygrip also for OPENPGP.3.
* scd/app-openpgp.c (check_keyidstr): Add optional arg r_use_auth to
test also for OpenPGP.3.
(do_sign): Enable that new mode.
--

This is very useful to allow gpgsm to use a certificate based on the
OpenPGP card's authentication key.  That key is usually used for ssh
but it makes sense to use it also for user certificate based
authentication.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-27 19:37:29 +01:00
Werner Koch
451cd1b392
gpgconf: Further simplify the gpgconf option processing.
* common/gc-opt-flags.h (GC_OPT_FLAG_RUNTIME): Move to ...
* tools/gpgconf-comp.c: here.
(known_options_scdaemon): Remove "options".
(known_options_dirmngr): Remove "options".
(known_options_gpgsm): Remove "options".
(known_options_gpg): Remove "options" and "keyserver".
(struct gc_option_s): Rename active t gpgconf_list.
(gc_component_list_options): Do not act upon active.
(option_check_validity): Ditto.
(is_known_option): Make it work correctly for unknown options.
(retrieve_options_from_program): Use renamed flag gpgconf_list only to
detect duplicated items from --gpgconf-list.  Do not set runtime.
Only e set the options if set by --gpgconf-list; never clear them.
* agent/gpg-agent.c: Simplify the --gpgconf-list output.
* dirmngr/dirmngr.c: Ditto.
* g10/gpg.c: Ditto.
* kbx/keyboxd.c: Ditto.
* scd/scdaemon.c: Ditto.
* sm/gpgsm.c: Ditto.
* tests/openpgp/gpgconf.scm: Use "compliance" instead of "keyserver"
for the string arg test.
--

There is no need to read the list of options from the components
unless they convey a default value.  It is better to consult only the
list we have in gpgconf-comp.c to decide on whether an option should
be displayed.   Right, this might mess up thing if a newer gpgconf
version is used with an older component, but we already print warnings
in this case and in general we do not want to support this anymore -
the times of gpg 1.4. and 2.0 are long over now.

GnuPG-bug-id: 4788
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-14 19:12:41 +01:00
Werner Koch
daf5f4355d
scd: Re-group the options in the --help output.
--

This looks better and is also required for further simplifications of
gpgconf.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-06 15:15:21 +01:00
Werner Koch
4423e9dcde
gpgconf: Support reading global options (part 2).
* tools/gpgconf-comp.c: Remove all regular option descriptions.  They
are now read in from the component.  Also remove a few meanwhile
obsolete options.
* agent/gpg-agent.c: Add option description which were only set in
gpgconf-comp.c.
* dirmngr/dirmngr.c: Ditto.
* scd/scdaemon.c: Ditto.
* sm/gpgsm.c: Ditto.
* g10/gpg.c: Ditto.
--

This second part removes all regular option descriptions because they
can be read from the components.  A few were missing in the components
and thus moved to there.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-03-06 10:09:26 +01:00
NIIBE Yutaka
19f70b5072 scd: Fix the previous commit.
* scd/app-openpgp.c (do_setattr): Flush the KDF DO just before setting.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-02-28 16:25:15 +09:00
NIIBE Yutaka
3ba7c9bcf7 scd: Improve setattr for KDF.
* scd/app-openpgp.c (do_setattr): For setting KDF DO, support standard
OpenPGP card, which needs to update PIN.

GnuPG-bug-id: 3891
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-02-28 15:58:24 +09:00
NIIBE Yutaka
11da441016 scd: Fix pinpad handling when KDF enabled.
* scd/app-openpgp.c (do_getattr): Send the KDF DO information.

--

Fixes-commit: 95c7498b76231d3297541172d878f6a26702539b
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-02-28 15:56:53 +09:00
Werner Koch
ba463128ce
Use gpgrt's new option parser for the remaining daemons.
* scd/scdaemon.c: Switch to the new option parser and enable a global
conf file.
* dirmngr/dirmngr.c: Ditto.
* g13/g13.c: Ditto.
* g13/g13-syshelp.c: Ditto.  Do not force verbose mode.
* dirmngr/dirmngr_ldap.c: Switch to the new option parser.
* dirmngr/dirmngr-client.c: Switch to the new option parser.
--

This finalizes the switch to the new option parser.  What's left is to
remove the old argparser code from common.

g13-syshelp does not anymore default to --verbose because that can now
be enabled in /etc/gnupg/g13-syshelp.conf.

GnuPG-bug-id: 4788
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-21 21:45:13 +01:00
Werner Koch
0e8f6e2aa9
gpg: Use gpgrt's new option parser to provide a global conf file.
* common/util.h: Remove argparse.h.
* common/argparse.c: Undef GPGRT_ENABLE_ARGPARSE_MACROS.
* configure.ac (GPGRT_ENABLE_ARGPARSE_MACROS): Define.
* agent/gpg-agent.c: Undef GPGRT_ENABLE_ARGPARSE_MACROS and include
argparse.h.  Do this also for all main modules which use our option
parser except for gpg.  Replace calls to strusage by calls to
gpgrt_strusage everywhere.

* g10/gpg.c (opts): Change type to gpgrt_opt_t.  Flag oOptions and
oNoOptions with ARGPARSE_conffile and ARGPARSE_no_conffile.
(main): Change type of pargs to gpgrt_argparse_t.  Rework the option
parser to make use of the new gpgrt_argparser.
--

This is not yet finished but a make check works.  gpg has the most
complex and oldest option handling and thus this is the first
migration target.  SE-Linux checks and version-ed config files are
missing and will be added later.

GnuPG-bug-id: 4788
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-20 11:13:32 +01:00
Daniel Kahn Gillmor
0904b8ef34 Spelling cleanup.
No functional changes, just fixing minor spelling issues.

---

Most of these were identified from the command line by running:

  codespell \
    --ignore-words-list fpr,stati,keyserver,keyservers,asign,cas,iff,ifset \
    --skip '*.po,ChangeLog*,help.*.txt,*.jpg,*.eps,*.pdf,*.png,*.gpg,*.asc' \
    doc g13 g10 kbx agent artwork scd tests tools am common dirmngr sm \
    NEWS README README.maint TODO

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
2020-02-18 18:07:46 -05:00
NIIBE Yutaka
95c7498b76 scd: Disable pinpad if it's impossible by KDF DO.
* scd/app-openpgp.c (struct app_local_s): Add pinpad.disabled field.
(do_getattr): Set pinpad.disabled field.
(check_pinpad_request): Use the pinpad.disabled field.
(do_setattr): Update pinpad.disabled field.

--

GnuPG-bug-id: 4832
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-02-17 17:44:59 +09:00
Werner Koch
11d917c779
scd: Print the main app name also for not fully supported cards.
* scd/app.c (send_serialno_and_app_status): Add fallback.
--

The app list was only printed for apps which support the with_keygrip
function.  That is not the case for the netkey and otehr cards.  The
new fallback prints the actual app name.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-13 15:43:17 +01:00
Werner Koch
1ad84aabb4
scd:openpgp: Return key creation time as part of KEYPARIINFO.
* scd/app-openpgp.c (send_keypair_info): Reaturn the key creation time
as part of a KEYPAIRINFO.
(do_readkey): Do not return the KEY-TIME anymore.
--

Sending the KEY_TIME status as part of a READKEY command was only
recently added.  It is better to merge that into the KEYPAIRINFO line.
Another patch with chnage this for the consumers of that info.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-13 11:52:10 +01:00
Werner Koch
77ea916533
scd:openpgp: Send a KEY-TIME status with READKEY
* scd/app-openpgp.c (retrieve_fprtime_from_card): New.
(do_readkey): Send a KEY_TIME status.
--

It might be easier to fold this into KEYPAIRINFO but for backward
compatibility using a separate status line is safer.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-11 20:41:29 +01:00
Werner Koch
323548acd9
scd:openpgp: Optional allow for lowercase keyrefs.
* scd/app-openpgp.c (do_readkey): Use case insensitive match of the
keyref.
(do_writekey, do_sign, do_auth, do_decipher): Ditto.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-11 14:51:50 +01:00
Werner Koch
d7d75da505
scd:openpgp: Allow auto-changing of the key attributes in genkey.
* scd/app-openpgp.c (struct app_local_s): Add field keyalgo.
(parse_algorithm_attribute): Store the new keyalgo field.
(change_keyattr): Change info message.
(change_keyattr_from_string): Rewrite to also accept a keyref and a
keyalgo string.
(do_genkey): Change the keyattr if a keyalgo string is given.
--

Having this feature makes it easier to use OpenPGP cards in a similar
way to other cards.  Note that the explicit changing via SETATTR is
still supported.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-11 14:49:11 +01:00
Werner Koch
24095101a5
common: Extend the openpgp_curve_to_oid function.
* common/openpgp-oid.c (openpgp_curve_to_oid): Add optional arg R_NBITS.
Change all callers.
--

In particular for ed25519 and cv25519 it is quite useful to have an
ability to get the required algorithm.
2020-02-11 14:40:54 +01:00
Werner Koch
6aff8a1328
build: Always use EXTERN_UNLESS_MAIN_MODULE pattern.
* common/util.h (EXTERN_UNLESS_MAIN_MODULE): Add the definion only
here but now without the Norcroft-C.  Change all other places where it
gets defined.
* common/iobuf.h (iobuf_debug_mode): Declare unconditionally as
extern.
* common/iobuf.c (iobuf_debug_mode): Define it here.
* agent/gpg-agent.c (INCLUDED_BY_MAIN_MODULE): Define here and also in
all main modules of all other programs.

* g10/main.h: Put util.h before the local header files.
--

This change is required for use with gcc/ld's LTO feature which does
not allow common blocks.  Further gcc 10 will make -fno-common the
default and thus this chnage is always needed.  What a pitty.

Co-authored-by: Tomáš Mráz
GnuPG-bug-id: 4831
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 21d9bd8b87a9f793a106095e3838eb71825189d7)

- Applied respective chnages also to gpg-card and keyboxd.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-10 16:50:47 +01:00
Werner Koch
fb6ff7ead7
scd:openpgp: Let the genkey function also accept a full keyref.
* scd/app-openpgp.c (send_key_attr): Use log_assert.
(do_genkey): Allow prefix.
--

It is more uniform to always use full keyref (e.g. "OPENPGP.1")
instead of just the key number.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-02-10 00:33:51 +01:00
Werner Koch
718555874e
scd: New commands SWITCHCARD and SWITCHAPP.
* scd/app.c: Include membuf.h.
(app_switch_current_card): New.
(send_card_and_app_list): Factor code out to ...
(send_serialno_and_app_status): new.
(app_send_card_list): New.
(app_send_active_apps): New.
(app_switch_active_app): New.
* scd/command.c (cmd_switchcard): New.
(cmd_switchapp): New.
(register_commands): Register new commands.
(cmd_getinfo): New sub-commands "active_apps" and "all_active_apps".
--

These new commands allow to switch between known cards and are in
particular useful for the gpg-card tool.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-16 19:42:16 +01:00
Werner Koch
dd61164410
scd:piv: Remove debug code from a recent commit.
* scd/app-piv.c (ask_and_prepare_chv): here.
--

The test code from the last PIV change was accidently kept enabled.
Fixes-commit: 2dd6b4b998dd6e156e2e75ede0f40fb768c69f40

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-16 19:38:54 +01:00
Werner Koch
2dd6b4b998
scd: Make the PIN cache robust against wrongdoing of gpg-agent.
* scd/app-openpgp.c (struct app_local_s): New field pincache.
(cache_pin): Set it.
(pin_from_cache): Consult it.
* scd/app-piv.c (struct app_local_s): New field pincache.
(cache_pin): Set it.
(pin_from_cache): Consult it.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-13 18:24:01 +01:00
Werner Koch
60502c3606
scd:piv: Implement PIN cache.
* scd/command.c (pincache_put): Add arg pinlen and change all callers
to provide it.
* scd/app-piv.c (cache_pin): New.
(pin_from_cache): New.
(ask_and_prepare_chv): Add args no_cache and r_unpaddedpinlen.  Take
PIN from the cache.  Return the unpadded length.
(verify_chv): Add arg ctrl.  Cache the PIN.
(do_change_chv): Clear PIN cache.
--

The PIV pins are padded but we want to store the unpadded PIN.  Thus
the changes to the function.

Code has has been tested by commenting the no_cache parameter because
we the current test certificate was created for PIV.9C which requires
a verification for each use.  More testing is required.

GnuPG-bug-id: 4791
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-13 17:53:49 +01:00
Werner Koch
2b843be5ac
scd: Fix memory leak in command READKEY.
* scd/command.c (cmd_readcert): Replace xstrdup by xtrystrdup.
(cmd_readkey): Ditto.  Fix memory leak.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-13 12:18:53 +01:00
Werner Koch
0e48aa0849
scd: Make SERIALNO --all work correctly and use it.
* scd/app.c (maybe_switch_app): Factor reselect code out to ...
(run_reselect): new.
(app_write_learn_status): Tweak diagnostics.
(app_do_with_keygrip): Run reselect if a card has more than one
switchable application.

* agent/call-scd.c (agent_card_serialno): Ditto.
* tools/card-call-scd.c (start_agent): Use option --all with SERIALNO.
(scd_serialno): Ditto.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-13 12:12:57 +01:00
NIIBE Yutaka
0cfded4bb1 scd: Implement direct access by KEYGRIP for GETATTR and READKEY.
* scd/app-openpgp.c (do_readkey): Handle KEYGRIP access.
* scd/command.c (do_readkey): New.
(cmd_readkey): Use do_readkey supporting KEYGRIP access.
(cmd_getattr): Supporting KEYGRIP access.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-01-10 15:58:49 +09:00
Werner Koch
63bda3aad8
scd:openpgp: Implement PIN cache.
* scd/app-openpgp.c (wipe_and_free, wipe_and_free_string): Use them
everywere where we do a wipememory followed by a free.
(pin2hash_if_kdf): Change interface.  The input PIN is not anymore
changed.  Further there are no more assumptions about the length of
the provided buffer.
(cache_pin): Restructure.
(chvno_to_keyref): New.
(pin_from_cache): New.
(verify_a_chv): Add arg CTRL.  Adjust for changed pin2hash_if_kdf.
Chache and retrieve the PIN here.
(verify_chv2): Do not cache the PIN here.
(build_enter_admin_pin_prompt): Add arg 'r_remaining'.
(verify_chv3): Adjust for changed pin2hash_if_kdf.  Implement the PIN
cache.
(do_change_pin): Clear the PIN cache.  Do not change the PIN here.
Lots of adjustments to cope with the chnaged pin2hash_if_kdf.
(do_sign): Do not cache the PIN here.
--

Note that some of the changes are required because we can't rely that
the PIN is always cached in secure memory.  Thus it is better to do an
explicit wipe.

Testing the PIN cache can currently only be done my modifying the
code to do a verification for each operation.  Only some basic testing
has been done.  Clearing the PIN cache is also not fully
implemented.  With the forthcoming changes to app-piv we should be
enter able to test the PIN cache.

Missing stuff:
 - The agent should be able to selectively clear the cache on a per
   slot base.
 - We should replace AESWRAP by OCB.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-09 12:14:05 +01:00
Werner Koch
ce5a7fb72b
scd: Use a scdaemon internal key to protect the PIN cache IPC.
* agent/call-scd.c (handle_pincache_put): Do not decrypt.
(handle_pincache_get): New.
(inq_needpin): Call it.
* scd/command.c (set_key_for_pincache): New.
(pincache_put): Restructure and set key.
(pincache_get): Ditto.
--

This change does away with encrypting and decrypting the cached PIN in
the agent.  There is no need for this we can simply cache the
cryptogram and let scdaemon decrypt after retrieving it from the
agent.  This way we do not need to share a key between gpg-agent and
scdaemon and further the cached content is invalid after the scdaemon
process has been replaced.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-01-09 12:00:50 +01:00