* scd/app-openpgp.c (get_prompt_info): Change texts.
* agent/call-pinentry.c (struct entry_features): New.
(getinfo_features_cb): New.
(start_pinentry): Set new fucntion as status callback.
(build_cmd_setdesc): New. Replace all snprintf for SETDESC by this
one.
--
Suggested-by: Andre Heinecke
Signed-off-by: Werner Koch <wk@gnupg.org>
* src/app-openpgp.c (get_prompt_info): Change wording and order
slightly.
--
The word "Card" was repeated too much in the prompt and moving
signatures to the bottom results in a more consistent layout
between the prompts with signcount and the prompts without.
Signed-off-by: Andre Heinecke <aheinecke@intevation.de>
* scd/app-openpgp.c (get_disp_name): New.
(get_disp_serialno): New.
(get_prompt_info): New.
(build_enter_admin_pin_prompt): Rework the prompt texts. Factor some
code out to ...
(get_remaining_tries): New.
(verify_a_chv): Print a remaining counter also for the standard PIN.
Rework the prompt texts.
* agent/divert-scd.c (ask_for_card): Pretty format an OpenPGP serial
no.
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app.c (app_get_serial_and_stamp): Remove.
(app_get_serialno): New.
(app_write_learn_status): Use send_status_direct.
(app_getattr): Use app_get_serialno for SERIALNO and
send with send_status_direct.
* scd/app-openpgp.c (do_getattr): Likewise.
* scd/command.c (cmd_serialno): Don't send TIMESTAMP of 0.
(cmd_learn): Likewise. Don't inquire with TIMESTAMP of 0.
--
In the SERIALNO protocol, timestamp used to be considered, but had never
used at all. In the new implementation, removed card/token is always
detected and connection becomes invalid, no timestamp is required any
more. Examined scute and poldi as well for this protocol change.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* common/openpgp-oid.c (openpgp_is_curve_supported): Add optional arg
R_ALGO and change all callers.
* common/util.h (GPG_ERR_UNKNOWN_FLAG): New error code.
* g10/options.h (struct opt): Add field DEF_NEW_KEY_ALGO.
* g10/gpg.c (oDefaultNewKeyAlgo): New enum.
(opts): New option "--default-new-key-algo".
(main): Set the option.
* g10/keygen.c: Remove DEFAULT_STD_ FUTURE_STD_ constants and replace
them by ...
(DEFAULT_STD_KEY_PARAM, FUTURE_STD_KEY_PARAM): new string constants.
(get_keysize_range): Remove arg R_DEF and return that value instead.
Change all callers.
(gen_rsa): Use get_keysize_range instead of the removed
DEFAULT_STD_KEYSIZE.
(parse_key_parameter_part): New function.
(parse_key_parameter_string): New function.
(quick_generate_keypair): Refactor using parse_key_parameter_string.
(generate_keypair): Ditto.
(parse_algo_usage_expire): Ditto.
--
This new option is intended to be used in the forthcoming
--set-profile command of gpgconf. It allows to provide a gpg
configuration with custom defaults for a new key using the simple
commands which use the default algorithm set.
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app-openpgp.c (struct app_local_s): Remove max_cmd_data and
max_rsp_data fields as Extended Capabilities bits are different.
(get_cached_data) Use extcap.max_certlen_3.
(get_one_do): Don't use exmode=1.
(determine_rsa_response): New.
(get_public_key, do_genkey): Call determine_rsa_response.
(do_sign): Use keyattr[0].rsa.n_bits / 8, instead of max_rsp_data.
(do_auth): Use keyattr[2].rsa.n_bits / 8, instead of max_rsp_data.
(do_decipher): Likewise with Use keyattr[1].rsa.n_bits / 8.
(show_caps): Remove max_cmd_data and max_rsp_data.
(app_select_openpgp): Likewise.
--
OpenPGP card V3 had introduced incompatible change in Extended
Capabilities bits. We can work around by this change by not
using those bits.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (do_decipher): When it's x-coordinate only, add the
prefix 0x41.
--
Card should return fixed size bytes, either in format of
(04 || X || Y) or (X, x-coordinate only).
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (send_key_attr): Use curve instead of OID.
(ecdh_params): New.
(ecc_read_pubkey): Use ecdh_params. Use curve name.
(ecc_writekey): Likewise.
(ecc_curve): Rename from ecc_oid.
(parse_algorithm_attribute): Use ecc_curve.
* g10/call-agent.c (learn_status_cb): Use openpgp_is_curve_supported to
intern the curve name string.
* g10/card-util.c (card_status): Conver curve name to alias for print.
--
Now, sdcaemon answer for KEY-ATTR is in the canonical curve name
instead of the alias. Since it is used of key generation for
card encryption key with backup, it should be canonical name.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* g10/keygen.c (generate_keypair): For card key generation, fill
parameters by KEY-ATTR.
* scd/app-openpgp.c (ecc_read_pubkey): OID should be freed at last,
after its reference by OIDBUF is finished.
(ecc_writekey): Likewise.
--
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (rsa_read_pubkey, ecc_read_pubkey): New.
(read_public_key): New.
(get_public_key, do_genkey): Use read_public_key.
--
With this change, since GENKEY updates the public key (pk[keyno].key) in
APP, READKEY will be possible after the command even for the old
card (version <= 0x0100).
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (get_public_key): Fix a message.
(change_keyattr_from_string, ecc_writekey): Call mpi_release sooner.
(do_genkey): Add ECC support.
--
In OpenPGP card specification 3.0, ECC is introduced. So far, do_genkey
only supported RSA. Since KDF spec. is needed to calculate the
fingerprint, it is hard coded in app-openpgp.c. But it's defined by
OpenPGP ECC (RFC-6637), and card does nothing with KDF in fact.
Co-authored-by: Arnaud Fontaine <arnaud.fontaine@ssi.gouv.fr>
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/iso7816.c (do_generate_keypair): Use const char * for DATA.
(iso7816_generate_keypair, iso7816_read_public_key): Likewise.
* scd/app-openpgp.c (get_public_key): Follow the change.
(do_genkey): Ditto. Use ERR instead of RC. Use u32 for CREATED_AT.
--
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (build_ecc_privkey_template): Size can be greater
than 128 when it comes with public key for curve of larger field.
--
Reported-by: Arnaud Fontaine <arnaud.fontaine@ssi.gouv.fr>
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (ECC_FLAG_PUBKEY): New.
(send_key_attr, get_public_key, ecc_writekey, do_auth, do_decipher)
(parse_algorithm_attribute): Check ECC_FLAG_DJB_TWEAK.
(build_ecc_privkey_template): Add ECC_Q and ECC_Q_LEN.
Support offering public key when ECC_FLAG_PUBKEY sets.
(ecc_writekey): Supply ECC_Q and ECC_Q_LEN.
(parse_algorithm_attribute): Parse pubkey-required byte.
--
OpenPGPcard protocol specification version 3.2 supports algorithm
attributes for ECC key which specifies public key data is required for
"keytocard" command. This change supports the feature.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* scd/app-openpgp.c (do_genkey): Strip leading zeros for fingerprint
computation.
--
This bug is difficult to reproduce because the probability is 1/256,
and key generation takes long time. The regression was introduced
when we add the support for ECC.
GnuPG-bug-id: 2150
* scd/app-openpgp.c (do_decipher): Handle trancated cipher text.
Also fix xfree bug introduced.
--
In old format with no prefix, cipher text can be trancated when it
is parsed as MPI. Recover the value adding back zeros.
Fixes-commit: 11b2691edd
* scd/app-openpgp.c (do_decipher): Check 0x02 also for 16+1 byte long
INDATA.
(do_decipher): Fix integer arithmetic in void pointer.
(do_decipher): Add missing memcpy.
--
I have not tested this fix but it is obvious.
Fixes-commit: 11b2691edd
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app-openpgp.c (get_public_key): Improve error handling.
--
Found using the Clang Static Analyzer.
Signed-off-by: Justus Winter <justus@g10code.com>
* scd/app-openpgp.c (change_rsa_keyattr): New.
(change_keyattr_from_string): Use change_rsa_keyattr.
(rsa_writekey): Call change_rsa_keyattr when different size.
(ecc_writekey): Try to change key attribute.
* agent/cvt-openpgp.c (get_keygrip): Handle Curve25519.
(convert_secret_key, convert_transfer_key): Ditto.
* common/openpgp-oid.c (oidtable): Add Curve25519.
(oid_crv25519, openpgp_oid_is_crv25519): New.
* common/util.h (openpgp_oid_is_crv25519): New.
* g10/ecdh.c (pk_ecdh_encrypt_with_shared_point): Handle the case
with Montgomery curve which uses x-only coordinate.
* g10/keygen.c (gen_ecc): Handle Curve25519.
(ask_curve): Change the API and second arg is to return subkey algo.
(generate_keypair, generate_subkeypair): Follow chage of ask_curve.
* g10/keyid.c (keygrip_from_pk): Handle Curve25519.
* g10/pkglue.c (pk_encrypt): Handle Curve25519.
* g10/pubkey-enc.c (get_it): Handle the case with Montgomery curve.
* scd/app-openpgp.c (ECC_FLAG_DJB_TWEAK): New.
(send_key_attr): Work with general ECC, Ed25519, and Curve25519.
(get_public_key): Likewise.
(ecc_writekey): Handle flag_djb_tweak.
--
When libgcrypt has Curve25519, GnuPG now supports Curve25519.
* common/openpgp-oid.c (openpgp_oid_to_curve): Add CANON argument.
* common/util.h: Update.
* g10/import.c (transfer_secret_keys): Follow the change.
* g10/keyid.c (pubkey_string): Likewise.
* g10/keylist.c (list_keyblock_print, list_keyblock_colon): Likewise.
* parse-packet.c (parse_key): Likewise.
* scd/app-openpgp.c (send_key_attr, get_public_key): Likewise.
--
Change the function so that caller can select canonical name of curve
or name for printing. Suggested by wk.
* scd/app-openpgp.c (send_key_attr): Send KEYNO.
(get_public_key): Fix SEXP composing.
(ecc_writekey): Fix OID length calculation.
(ecc_oid): Prepend the length before query.
(parse_algorithm_attribute): Handle the case the curve is not available.
* g10/call-agent.h (struct agent_card_info_s): Add curve field.
* g10/call-agent.c (learn_status_cb): Use curve name.
* g10/card-util.c (card_status): Show pubkey name.
* scd/app-openpgp.c (struct app_local_s): Record OID and flags.
(store_fpr): Use ALGO instead of key type.
(send_key_attr): Use curve name instead of OID.
(get_public_key): Clean up by OID to curve name.
(ecc_writekey): Support any curves in libgcrypt.
(do_genkey, do_auth, ): Follow the change.
(ecc_oid): New.
(parse_algorithm_attribute): Show OID here.
* g10/card-util.c (do_change_keysize): Put "rsa".
* scd/app-openpgp.c (change_keyattr, change_keyattr_from_string):
Change the command format.
(rsa_writekey): Check key type.
(do_writekey): Remove "ecdh" and "ecdsa" support which was available
in experimental libgcrypt before 1.6.0.
* agent/pksign.c (agent_pksign_do): Use int.
* scd/app-openpgp.c (get_public_key): Likewise.
--
On 64-bit architecture, int and size_t might be different.
For the first argument for '%b', int is expected.
* common/host2net.h (buf16_to_ulong, buf16_to_uint): New.
(buf16_to_ushort, buf16_to_u16): New.
(buf32_to_size_t, buf32_to_ulong, buf32_to_uint, buf32_to_u32): New.
--
Commit 91b826a388 was not enough to
avoid all sign extension on shift problems. Hanno Böck found a case
with an invalid read due to this problem. To fix that once and for
all almost all uses of "<< 24" and "<< 8" are changed by this patch to
use an inline function from host2net.h.
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app-openpgp.c (store_fpr): Remove CARD_VERSION from the
arguments.
(rsa_writekey): Follow the change.
(do_genkey): Likewise.
(ecc_writekey): Likewise. Cast to size_t.
--
KEYTOCARD caused SEGV of scdaemon on 64-bit arch. That's because
int is 32-bit, but size_t is 64-bit.
* scd/app-openpgp.c (get_public_key): correctly close 'fp' upon use.
--
Inside the get_public_key function, 'fp' was opened using popen, but
incorrectly closed using fclose.
Debian-Bug-Id: 773474
* agent/divert-scd.c (divert_pkdecrypt): Support ECDH.
* scd/app-openpgp.c (get_algo_byte, store_fpr): Support ECDH.
(send_key_attr): Support ECDH. Fix EdDSA algorithm value.
(retrieve_key_material): Initialize fields.
(get_public_key, ecc_writekey, do_writekey): Support ECDH.
(ecdh_writekey): Remove.
(do_decipher): Support ECDH.
(parse_algorithm_attribute): Support ECDH. Fix EdDSA.
--
Following the gpg-agent protocol, SCDaemon's counter part is now
implemented.
* common/util.h (GPG_ERR_OBJ_TERM_STATE): New.
* scd/iso7816.c (map_sw): Add this error code.
* scd/app-openpgp.c (do_getattr): Return the life cycle indicator.
* scd/app.c (select_application): Allow a return value of
GPG_ERR_OBJ_TERM_STATE.
* scd/scdaemon.c (set_debug): Print the DBG_READER value.
* g10/call-agent.c (start_agent): Print a status line for the
termination state.
(agent_scd_learn): Make arg "info" optional.
(agent_scd_apdu): New.
* g10/card-util.c (send_apdu): New.
(factory_reset): New.
(card_edit): Add command factory-reset.
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app-openpgp.c (KEY_TYPE_EDDSA, CURVE_ED25519): New.
(struct app_local_s): Add eddsa.
(get_algo_byte, store_fpr): Support KEY_TYPE_EDDSA.
(get_ecc_key_parameters, get_curve_name): Support CURVE_ED25519.
(send_key_attr, get_public_key): Support KEY_TYPE_EDDSA.
(build_ecc_privkey_template): Rename as it supports both of
ECDSA and EdDSA.
(ecc_writekey): Rename. Support CURVE_ED25519, too.
(do_writekey): Follow the change of ecc_writekey.
(do_auth): Support KEY_TYPE_EDDSA.
(parse_ecc_curve): Support CURVE_ED25519. Bug fix for other curves.
(parse_algorithm_attribute): Bug fix for ECDH. Support EdDSA.
* scd/app-openpgp.c (do_writekey): Added RSA_CRT and RSA_CRT_N support.
--
Updates of original patch by wk:
- unsigned char *rsa_u, *rsa_dp, rsa_dq;
+ unsigned char *rsa_u, *rsa_dp, *rsa_dq;
and AUTHORS. Missing signed-off-by assumed due to DCO send the other
day.
* scd/app-common.h (APP_DECIPHER_INFO_NOPAD): New.
* scd/app-openpgp.c (do_decipher): Add arg R_INFO.
* scd/app-nks.c (do_decipher): Add arg R_INFO as a dummy.
* scd/app.c (app_decipher): Add arg R_INFO.
* scd/command.c (cmd_pkdecrypt): Print status line "PADDING".
* agent/call-scd.c (padding_info_cb): New.
(agent_card_pkdecrypt): Add arg R_PADDING.
* agent/divert-scd.c (divert_pkdecrypt): Ditto.
* agent/pkdecrypt.c (agent_pkdecrypt): Ditto.
* agent/command.c (cmd_pkdecrypt): Print status line "PADDING".
* g10/call-agent.c (padding_info_cb): New.
(agent_pkdecrypt): Add arg R_PADDING.
* g10/pubkey-enc.c (get_it): Use padding info.
--
Decryption using a card never worked in gpg 2.1 because the
information whether the pkcs#1 padding needs to be removed was not
available. Gpg < 2.1 too this info from the secret sub key but that
has gone in 2.1.
Signed-off-by: Werner Koch <wk@gnupg.org>
* scd/app-openpgp.c (do_sign): Only prepend message digest block
for RSA or do_auth.
(do_auth): Remove message digest block for ECDSA.
--
If we don't need to check the message digest block by SCDaemon, we
don't requite the message digest block for ECDSA by gpg-agent.
* scd/app-openpgp.c (key_type_t): New.
(CURVE_NIST_P256, CURVE_NIST_P384, CURVE_NIST_P521): New.
(struct app_local_s): Change keyattr to have key_type and union.
(get_ecc_key_parameters, get_curve_name): New.
(send_key_attr, get_public_key): Support ECDSA.
(build_privkey_template, do_writekey, do_genkey): Follow the change
of the member KEY_ATTR.
(parse_historical): New.
(parse_algorithm_attribute): Support ECDSA.
--
Add ECDSA support to OpenPGP card.
* scd/app-openpgp.c (struct app_local_s): Remove VARLEN.
(parse_login_data): "P=0" means to disable pinpad.
(check_keypad_request): Default is to use pinpad if available.
* scd/iso7816.h (struct pininfo_s): Rename from iso7816_pininfo_s.
Change meaning of MODE.
(pininfo_t): Rename from iso7816_pininfo_t.
* scd/sc-copykeys.c: Include "iso7816.h".
* scd/scdaemon.c, scd/command.c: Likewise.
* scd/ccid-driver.c: Include "scdaemon.h" and "iso7816.h".
(ccid_transceive_secure): Follow the change of PININFO_T.
* scd/app.c: Include "apdu.h" after "iso7816.h".
* scd/iso7816.c (iso7816_check_keypad, iso7816_verify_kp)
(iso7816_change_reference_data_kp): Follow the change of API.
* scd/apdu.c (struct reader_table_s): Change API of CHECK_KEYPAD,
KEYPAD_VERIFY, KEYPAD_MODIFY to have arg of PININFO_T.
(check_pcsc_keypad, check_ccid_keypad): Likewise.
(apdu_check_keypad, apdu_keypad_verify, apdu_keypad_modify): Likewise.
(pcsc_keypad_verify, pcsc_keypad_modify, ct_send_apdu)
(pcsc_send_apdu_direct, pcsc_send_apdu_wrapped, pcsc_send_apdu)
(send_apdu_ccid, ccid_keypad_operation, my_rapdu_send_apdu, send_apdu)
(send_le): Follow the change of API.
* scd/apdu.h (apdu_check_keypad, apdu_keypad_verify)
(apdu_keypad_modify): Change the API.
* scd/app-dinsig.c, scd/app-nks.c, scd/app-openpgp.c: Follow the
change.
* scd/command.c (MAXLEN_SETDATA): New.
(cmd_setdata): Add option --append.
* agent/call-scd.c (agent_card_pkdecrypt): Use new option for long
data.
* scd/app-openpgp.c (struct app_local_s): Add field manufacturer.
(app_select_openpgp): Store manufacturer.
(do_decipher): Print a note for broken cards.
--
Please note that I was not able to run a full test because I only have
broken cards (S/N < 346) available.
The asymmetric quotes used by GNU in the past (`...') don't render
nicely on modern systems. We now use two \x27 characters ('...').
The proper solution would be to use the correct Unicode symmetric
quotes here. However this has the disadvantage that the system
requires Unicode support. We don't want that today. If Unicode is
available a generated po file can be used to output proper quotes. A
simple sed script like the one used for en@quote is sufficient to
change them.
The changes have been done by applying
sed -i "s/\`\([^'\`]*\)'/'\1'/g"
to most files and fixing obvious problems by hand. The msgid strings in
the po files were fixed with a similar command.
* apdu.c (pcsc_keypad_verify): Have dummy Lc field with value 0.
(pcsc_keypad_modify): Likewise.
(pcsc_keypad_modify): It's only for ISO7816_CHANGE_REFERENCE_DATA.
bConfirmPIN value is determined by the parameter p0.
* app-openpgp.c (do_change_pin): The flag use_keypad should be 0 when
reset_mode is on, or resetcode is on. use_keypad only makes sense for
iso7816_change_reference_data_kp.
* iso7816.h (iso7816_put_data_kp): Remove.
(iso7816_reset_retry_counter_kp): Remove.
(iso7816_reset_retry_counter_with_rc_kp): Remove.
(iso7816_change_reference_data_kp): Add an argument: IS_EXCHANGE.
* iso7816.c (iso7816_put_data_kp): Remove.
(iso7816_reset_retry_counter_kp): Remove.
(iso7816_reset_retry_counter_with_rc_kp): Remove.
(iso7816_change_reference_data_kp): Add an argument: IS_EXCHANGE.
Before this change, it is layered like following:
iso7816_verify
iso7816_verify_kp
apdu_send_simple, apdu_send_simple_kp
...
After this change, it will be layered like:
iso7816_verify iso7816_verify_kp
apdu_send_simple apdu_keypad_verify
...
and apdu_send_simple_kp will be deprecated.
For PC/SC API, we use:
SCardControl API to compose CCID PC_to_RDR_Secure message
SCardTransmit API to compose CCID PC_to_RDR_XfrBlock message
Considering the support of PC/SC, we have nothing to share between _kp
version of iso7816_* and no _kp version.
This patch implementes a chunk mode to pass the key parameters from
scdaemon to gpg. This allows to pass arbitrary long key paremeters;
it is used for keys larger than 3072 bit.
Note: the card key generation in gpg is currently broken. The keys
are generated but it is not possible to create the self-signature
because at that time the gpg-agent does not yet know about the new
keys and thus can't divert the sign request to the card. We either
need to run the learn command right after calling agent_scd_genkey or
implement a way to sign using the currently inserted card. Another
option would be to get rid of agent_scd_genkey and implement the
feature directly in agent_genkey.
We better do this once and for all instead of cluttering all future
commits with diffs of trailing white spaces. In the majority of cases
blank or single lines are affected and thus this change won't disturb
a git blame too much. For future commits the pre-commit scripts
checks that this won't happen again.
* scdaemon.c (main): Use estream_asprintf instead of asprintf.
* command.c (update_reader_status_file): Likewise.
(cmd_serialno): Use estream_asprintf instead of asprintf
and xfree instead of free to release memory allocated
through (estream_)asprintf.
(cmd_learn): Likewise.
(pin_cb): Likewise.
* app-openpgp.c (get_public_key): Likewise.
char * vs. unsigned char * warnings. The GNU coding standards used to
say that these mismatches are okay and better than a bunch of casts.
Obviously this has changed now.
* gpg-agent.c: New option --write-env-file.
* gpg-agent.c (handle_connections): Make sure that the signals we
are handling are not blocked.Block signals while creating new
threads.
* estream.c: Use HAVE_CONFIG_H and not USE_CONFIG_H!
(es_func_fd_read, es_func_fd_write): Protect against EINTR.
* gpg-agent.texi (Agent UPDATESTARTUPTTY): New.
* scdaemon.c (handle_connections): Make sure that the signals we
are handling are not blocked.Block signals while creating new
threads.
(handle_connections): Include the file descriptor into the name of
the thread.
(agent_scd_check_aliveness): New.
* gpg-agent.c (handle_tick): Test for an alive scdaemon.
(handle_signal): Print thread info on SIGUSR1.
* scdaemon.c (handle_signal): Print thread info on SIGUSR1.
(show_file): Implement it.
* keyformat.txt: Define the created-at attribute for keys.
* ccid-driver.c: Replaced macro DEBUG_T1 by a new debug level.
(parse_ccid_descriptor): Mark SCR335 firmware version 5.18 good.
(ccid_transceive): Arghhh. The seqno is another bit in the
R-block than in the I block, this was wrong at one place.
* scdaemon.c: New options --debug-ccid-driver and
--debug-disable-ticker.
* app-openpgp.c (do_genkey, do_writekey): Factored code to check
for existing key out into ..
(does_key_exist): .. New function.
* gpg-connect-agent.c (add_definq, show_definq, clear_definq)
(handle_inquire): New.
(read_and_print_response): Handle INQUIRE command.
(main): Implement control commands.
(do_sign): Call it.
* iso7816.c (iso7816_manage_security_env): Allow passing DATA as
NULL to indicate an empty Lc.
* tlv.c (find_tlv): Check that a found object fits into the
buffer.
(find_tlv_unchecked): New as replacement for the old non-checking
variant.
* app.c (select_application): Keep on using the non-checking
variant.
* app-openpgp.c (get_one_do, dump_all_do): Ditto.
proper error code.
(retrieve_next_token): Removed.
(retrieve_fpr_from_card): Rewritten to make use of DO caching and
to take the KEYNO as arg.
(get_public_key): Renamed variable for clarity.
* app-openpgp.c (retrieve_fpr_from_card): New function.
(retrieve_next_token): New function.
(retrieve_key_material): New function.
(get_public_key): Implement retrival of key through expernal
helper (gpg) in case the openpgp card is not cooperative enough.
%0A may pass through.
* agent.h (server_control_s): New field USE_AUTH_CALL.
* call-scd.c (agent_card_pksign): Make use of it.
* command-ssh.c (data_sign): Set the flag.
(ssh_send_key_public): New arg OVERRIDE_COMMENT.
(card_key_available): Add new arg CARDSN.
(ssh_handler_request_identities): Use the card s/n as comment.
(sexp_key_extract): Use GCRYMPI_FMT_STD.
(data_sign): Ditto.
* learncard.c (make_shadow_info): Moved to ..
* protect.c (make_shadow_info): .. here. Return NULL on malloc
failure. Made global.
* agent.h: Add prototype.
* xasprintf.c (xtryasprintf): New.
* app-openpgp.c (get_public_key): Make sure not to return negative
numbers.
(do_sign): Allow passing of indata with algorithm prefix.
(do_auth): Allow OPENPGP.3 as an alternative ID.
* app.c (app_getattr): Return just the S/N but not the timestamp.
* no-libgcrypt.c (gcry_strdup): New.
select returns with -1.
* tools.texi (gpg-connect-agent): New.
* app-openpgp.c (get_one_do): Never try to get a non cacheable
object from the cache.
(get_one_do): Add new arg to return an error code. Changed all
callers.
(do_getattr): Let it return a proper error code.
* app.c (select_application): Return an error code and the
application context in an new arg.
* command.c (open_card): Adjusted for that. Don't use the
fallback if no card is present. Return an error if the card has
been removed without a reset.
(do_reset, cmd_serialno): Clear that error flag.
(TEST_CARD_REMOVAL): New. Use it with all command handlers.
* scdaemon.c (ticker_thread): Termintate if a shutdown is pending.
* apdu.c: Added some PCSC error codes.
(pcsc_error_to_sw): New.
(reset_pcsc_reader, pcsc_get_status, pcsc_send_apdu)
(open_pcsc_reader): Do proper error code mapping.
* gpg-connect-agent.c: New.
* Makefile.am: Add it.
