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Commit Graph

688 Commits

Author SHA1 Message Date
Werner Koch
1049f06c6d
scd:openpgp: Allow keygrip to be used to reference a key
* scd/app-openpgp.c (struct app_local_s): Add keygrip_str.
(store_keygrip): New.
(read_public_key): Store the keygrip.
(get_public_key): Sitto.
(send_keypair_info): USe the stored keygrip.
(check_keyidstr): New.  Factored out from other functions and
extended.
(do_sign): Use check_keyidstr.
(do_auth): Ditto.
(do_decipher): Ditto.
(do_check_pin): Ditto.
--

This code is a backport of commits:

b0f0791e4a
cd: Factor out a function to check keyidstr.

4c4999b818
scd:openpgp: Allow PKSIGN with keygrip also for OPENPGP.3.

e769609cd3
scd: Allow KEYGRIP as KEYIDSTR.

Co-authored-by: NIIBE Yutaka <gniibe@fsij.org>
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-16 17:09:37 +01:00
Werner Koch
7076f6cafb
scd: Skip unknown options in command SERIALNO
* scd/command.c (cmd_serialno): Skip options.
--

SERIALNO --all
works only in 2.3 and thus naive use with 2.2 vesions would conserer
"--all" as the reqyested applications.  Fix is easy and should be done
anyway.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-12 12:44:57 +01:00
Werner Koch
bd3b698d8e
scd: Do not print reader status change with --debug cardio.
--

... but use --debug reader for this.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-11 14:50:49 +01:00
Werner Koch
163e4ff195
w32: Support Unicode also for config files etc.
* common/sysutils.c (gnupg_fopen) [W32]: Use _wfopen if needed.   Use
new function in most places where fopen is used.
--

The config files in 2.2 are still read using fopen - we need to change
this to allow Unicode directory names.  There is also one case where
files are written using the old fopen.  The new option parser in 2.3
does not have this problem but at some places fopen is also still used.

GnuPG-bug-id: 5098
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-10 12:09:11 +01:00
NIIBE Yutaka
8e206c1721
scd: Internal CCID driver: Fix a race condition on close.
* scd/ccid-driver.c (ccid_require_get_status): For VENDOR_SCM reader,
return 0 only at the initial call.
(bulk_in): Don't detect an error for VENDOR_SCM reader, just kicking
the loop, to invoke scd_update_reader_status_file, which calls
ccid_slot_status again.
(ccid_slot_status): Move the call of ccid_vendor_specific_setup to...
(ccid_get_atr): ... here.

--

For readers with interrupt transfer support, it is only intr_cb which
sets handle->powered_off to 1.  Keeping this condition makes no race.
The function ccid_slot_status can also detect a communication error,
which causes apdu_close_reader (but not setting ->powered_off).

GnuPG-bug-id: 5121
Fixes-commit: 920f258eb6
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
(cherry picked from commit 484bafda4d)
2020-11-09 13:26:40 +01:00
Werner Koch
7f765a98fd
card: Run factory-reset in locked stated.
* scd/command.c (reset_notify): Add option --keep-lock.
(do_reset): Add arg keep_lock.
(cmd_lock): Send progress status.
* g10/call-agent.c (agent_scd_apdu): Add more pseudo APDUs.
* g10/card-util.c (send_apdu): Ditto.
(factory_reset): Use lock commands.
--

This is required so that for example Kleopatra does not detect the
RESET and issues a SERIALNO of its own, thus conflicting with our
SERIALNO undefined.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-09 13:04:38 +01:00
NIIBE Yutaka
38040ffee8
scd: Internal CCID driver thing only for SPR532.
* scd/ccid-driver.c (ccid_vendor_specific_setup): New.  Limit
only for SPR532, excluding other readers by SCM.
(ccid_slot_status): Use ccid_vendor_specific_setup.

--

We follow the setup procedure of libccid implementation, which sends
the escape command for SPR532 only.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-26 13:31:08 +01:00
NIIBE Yutaka
d1c9cc3ca0
scd: Internal CCID driver limiting only for SPR532.
* scd/ccid-driver.c (ccid_vendor_specific_init): Only do that for
SPR532.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-26 13:31:02 +01:00
Werner Koch
5c6e9b44cc
Replace most of the remaining stdio calls by estream calls.
--

We need to use es_fopen on Windows to cope with non-ascii file names.
This is quite a large but fortunately straightforward change.  At a
very few places we keep using stdio (for example due to the use of
popen).

GnuPG-bug-id: 5098
Signed-off-by: Werner Koch <wk@gnupg.org>
Backported-from-master: 390497ea11
2020-10-21 21:09:38 +02:00
NIIBE Yutaka
25bec16d0b scd: Add a workaround for Yubikey.
* scd/app-openpgp.c (get_public_key): Handle wrong code for Yubikey.

--

Backport master commit of:

	0db9c83555

Yubikey version 5 s/n 609074582 returns 0x6982, version 5.2.4 s/n
610616049 returns 0x6581, where 0x6a88 is expected.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 17:15:49 +09:00
NIIBE Yutaka
0f4c956a76 scd: Silence compiler warning.
* scd/app-openpgp.c (build_ecc_privkey_template): Fix allocation size.

--

Cherry-picked from master commit of:

	2a34a2afea

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 12:01:13 +09:00
NIIBE Yutaka
7c8823bf82 scd: Report any error for LEARN command.
* scd/app-openpgp.c (do_learn_status): Report any error.

--

Backport master commit of:

	862d9c6fac

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:52:24 +09:00
NIIBE Yutaka
1f1b68eef7 scd: Internal CCID driver: More fix for SPR532.
* scd/ccid-driver.c (bulk_in): Handle the case of missing intr_cb.

--

Backport master commit of:

	920f258eb6

GnuPG-bug-id: 5065
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:46:13 +09:00
NIIBE Yutaka
33a2d4bd7f scd: Internal CCID driver fix.
* scd/ccid-driver.c (intr_cb): More useful debug output.
(ccid_slot_status): Remove redundant condition.

--

Backport master commit of:

	1444203ca3

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:45:45 +09:00
NIIBE Yutaka
48565e7a08 scd: Internal CCID driver: Call libusb_clear_halt at ccid_setup_intr.
* scd/ccid-driver.c (ccid_setup_intr): Reset the endpoint.
(ccid_vendor_specific_init): Don't call libusb_clear_halt.

--

Backport master commit of:

	6af978713e

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:44:57 +09:00
NIIBE Yutaka
30693dfb6f scd: Internal CCID driver: Fix a failure path.
* scd/ccid-driver.c (ccid_open_usb_reader): On error, call
libusb_release_interface.

--

Backport master commit of:

	d561c936a2

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:44:21 +09:00
NIIBE Yutaka
498cd38019 scd: Internal CCID: Handle LIBUSB_ERROR_TIMEOUT at ccid_get_atr.
* scd/ccid-driver.c (ccid_slot_status): Handle LIBUSB_ERROR_TIMEOUT.

--

Backport master commit of:

	b1e8072320

With SPR532, at the first connection, it fails by
LIBUSB_ERROR_TIMEOUT, but no retry.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:43:48 +09:00
NIIBE Yutaka
7db836c0e9 scd: Change handling of SPR532 card reader.
* scd/ccid-driver.c (ccid_vendor_specific_init): Put some workaround
for SPR532 initialization.
(ccid_slot_status): Send ESCape command after GetSlotStatus.

--

Backport master commit of:

	684a52dffa

GnuPG-bug-id: 5065
Fixes-commit: 4fae55f8ee
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:43:13 +09:00
NIIBE Yutaka
11d8d1e050 scd: For SPR532, submit the ESCape command at initialization.
* scd/ccid-driver.c (ccid_vendor_specific_init): Submit the ESC
command for VENDOR_SCM.
(ccid_transceive_secure): Don't submit the ESC command every time.

--

Backport master commit of:

	4fae55f8ee

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:42:23 +09:00
NIIBE Yutaka
dd7cc24d5f scd: Fix CCID internal driver for interrupt transfer.
* scd/ccid-driver.c (intr_cb): Handle the case of multiple messages.

--

Backport master commit of:

	7cbb513a2d

SPR532 USB Smart Card Reader (also know as SPR332) may send two
messages at once for a single interrupt transfer.  An example transfer
observed was like: 50 03 50 02, which is considered valid, according
to the CCID specification.

GnuPG-bug-id: 5065
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:41:25 +09:00
NIIBE Yutaka
186d11896c scd: Better handling of timeout and time extension.
* scd/ccid-driver.c (CCID_CMD_TIMEOUT_LONGER): Remove.
(ccid_transceive): Don't use x4 blindly for bBWI, but use dynamically
determined value.  Use value from variable wait_more for bulk_in.
Set wait_more by the value of time extension request.

--

Backport master commit of:

	f1cf799a37

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:38:40 +09:00
NIIBE Yutaka
60af035c22 scd: Fix internal CCID driver, so that -DTEST works.
* scd/ccid-driver.c: Support a test program by ccid-driver.

--

Backport from master commit:

	b310604252

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:27:41 +09:00
NIIBE Yutaka
165312dca9 scd: ccid-driver: Initial getting ATR more robustly.
* scd/ccid-driver.c (send_power_off): New.
(do_close_reader): Use send_power_off.
(ccid_get_atr): Add error recovery.

--

Backport from master commit of:

	c51a568555

GnuPG-bug-id: 4616
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:21:42 +09:00
NIIBE Yutaka
1efc01ff98 scd: Clean up the structure for future fix of PC/SC.
* scd/apdu.c (struct dev_list): Rename from ccid_table, with void*.
(open_ccid_reader): Follow the change.
(apdu_dev_list_start, apdu_dev_list_finish): Likewise.
(apdu_open_reader): Likewise.
* scd/ccid-driver.c (ccid_dev_scan): Use void *.
(ccid_dev_scan_finish, ccid_get_BAI, ccid_open_usb_reader): Likewise.
* scd/ccid-driver.h: Change the APIs.

--

Backport from master commit of:

	f44aa290c1

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:17:58 +09:00
Werner Koch
5b985b0264 scd: Map some error codes from libusb to ccid-driver error codes.
* scd/ccid-driver.h (CCID_DRIVER_ERR_USB_*): New error codes.
* scd/apdu.h: New SW_HOST error codes.
* scd/apdu.c (host_sw_string): Print them
* scd/ccid-driver.c (map_libusb_error): New.
(ccid_open_usb_reader, bulk_in, abort_cmd): Map libusb error codes.
* scd/iso7816.c (map_sw): Map new codes to gpg-error.
--

Backport from master commit:

	9a8d7e41bb

This change will help to get low level error conditions from hipher
application code.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-10-06 11:14:59 +09:00
NIIBE Yutaka
cccdca61a8 scd: internal driver: Submit SET_INTERFACE control transfer.
* scd/ccid-driver.c (ccid_open_usb_reader): Alway submit SET_INTERFACE
control transfer.

--

Backport from master commit:

	611faf1579

This handling is not mondatory, but it's better to do so, because
there are card reader with pinpad and token with ack button, which
support user interaction.

User interaction status should be reset at open time.  The status
should be reset when the session is closed/stopped.  In practice,
since cleanup routine in a driver may not be called properly, it's
good to submit SET_INTERFACE at open time.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-10-06 11:14:29 +09:00
NIIBE Yutaka
e3a12b09dc scd: Internal CCID driver: Spelling cleanup.
--

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

Backport master commit of:
	0904b8ef34
2020-10-06 11:06:53 +09:00
NIIBE Yutaka
7b531fe580 scd: Internal CCID driver: Clean up backport from master.
* scd/ccid-driver.c (print_error) [TEST]: Add missing break.  Note
    that this is anyway an impossible case.

--

Backport master commit of:

	8fb14d3b3f

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-10-06 11:02:24 +09:00
Werner Koch
c81f02c959
w32: Add manifest files to most binaries
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-10-02 17:04:12 +02:00
Werner Koch
c10ba8e883
doc: Typo fixes
--
2020-10-02 12:32:37 +02:00
NIIBE Yutaka
61aea64b3c scd: Fix the use case of verify_chv2 by CHECKPIN.
* scd/app-openpgp.c (verify_chv2): Call verify_a_chv with chvno=1
when needed.

--

Backport of master commit of:
	6e51f2044a

Fixes-commit: d2f1a0a791
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-09-16 12:46:50 +09:00
NIIBE Yutaka
0a9665187a scd: Fix a regression for OpenPGP card.
* scd/app-openpgp.c (verify_chv2): Make sure loading keys.

--

Fixes-commit: d2f1a0a791
Reported-by: Michał Górny
GnuPG-bug-id: 5039
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-09-01 15:23:59 +09:00
NIIBE Yutaka
d2f1a0a791 scd: Add condition for VERIFY with 0x82.
* scd/app-openpgp.c (verify_chv2): Check availability of keys in
question.

--

Backport master commit of:
	af189be481

With buggy Gnuk (<= 1.2.15), when no encr/auth keys are available,
it fails decrementing the signature error counter.  This change
can avoid the issue.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-08-27 10:54:59 +09:00
NIIBE Yutaka
e285b1197b scd: Fix condition for C5 data object for newer Yubikey.
* scd/app-openpgp.c (compare_fingerprint): Relax the condition.

--

Cherry-picked from master commit of:
	f3df8dbb69

GnuPG-bug-id: 4957
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-05-29 11:21:01 +09:00
Werner Koch
c6324ee07a
common: Change argument order of log_printhex.
* common/logging.c (log_printhex): Chnage order of args.  Make it
printf alike.  Change all callers.
* configure.ac: Add -Wno-format-zero-length
--

This makes it consistent with modern libgpgrt logging and thus eases
back porting from newer GnuPG versions which use libgpgrt logging.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-05-12 18:51:47 +02:00
Werner Koch
39e2260d7e
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>
2020-04-15 15:42:35 +02:00
Werner Koch
beaa2cbb7f
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>

Backported from master.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:42:01 +02:00
Werner Koch
9e6a3290da
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>
Backported from master.
2020-04-15 15:38:13 +02:00
Werner Koch
9497d25c56
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.
--

Signed-off-by: Werner Koch <wk@gnupg.org>

Backported from master:
- Removed the non-existant app-piv.c patches.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:35:55 +02:00
Werner Koch
471b06e91b
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.  Change the padding
indicator to 0x81.

* common/percent.c (percent_data_escape): new.  Taken from master.
--

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>

Backported from master.  This required to add the percent_data_escape
function we introduced in master on 2018-07-02:

    commit 58baf40af6
    common: New function percent_data_escape.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:31:56 +02:00
Werner Koch
4148976841
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>

Backported from master.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:21:25 +02:00
Werner Koch
431b3e68e0
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>

Backported from master:

.. or well in master and 2.2

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:16:05 +02:00
Werner Koch
b0cb2c2ab8
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>

Backported from master.  Removed the do_with_keygrip related parts
because that function is not available.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-15 15:13:42 +02:00
Werner Koch
133b6ff8cd
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>
2020-04-15 15:10:54 +02:00
Werner Koch
b95a0bfbba
scd:p15: Add missing keygrip retrieval for decryption.
* scd/app-p15.c (do_decipher): Get the keygrip.
--

This was lost during the backport.

Fixes-commit: 4af38ea5e4
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 17:43:05 +02:00
Werner Koch
4af38ea5e4
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>

Back ported from master.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 16:11:29 +02:00
Werner Koch
ce9406ca37
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>

Bakc ported from master

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 16:05:54 +02:00
Werner Koch
e730444e7b
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.
common/scd:p15: Support signing with CardOS 5 cards.
* common/util.h (KEYGRIP_LEN): New.
--

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>

Back ported from master:
- Removed do_with_keygrip
- Added KEYGRIP_LEN
- app_help_get_keygrip_string_pk actually added.
- Move keygrip_from_prkdf in do_sign before the verification.
  It used to work in master only because there it is implictly
  called prior to signing by do_with_keygrip

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-04-01 16:00:31 +02:00
Werner Koch
368f006a28
scd:p15: Read certificates in extended mode.
* scd/app-p15.c (readcert_by_cdf): Allow reading in extended mode.
* scd/app-common.h (app_get_slot): New.
--

Signed-off-by: Werner Koch <wk@gnupg.org>

(Back ported from master)

Added app_get_slot.
2020-04-01 15:01:43 +02:00
Werner Koch
64142caafe
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>
2020-04-01 14:55:30 +02:00