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9956 Commits

Author SHA1 Message Date
Werner Koch
5804db1a13
card: Netkey improvement for passwd.
* tools/gpg-card.c (cmd_passwd) [Netkey]: No Standard/QES menu if the
card does not support it.  Print no error in cases the user canceled.
2020-11-27 10:00:21 +01:00
NIIBE Yutaka
bb591222c3 scd:ccid-driver: Fix pinpad error handling for cancel/timeout.
* scd/apdu.h (SW_HOST_UI_CANCELLED, SW_HOST_UI_TIMEOUT): New.
* scd/ccid-driver.h (CCID_DRIVER_ERR_UI_CANCELLED): New.
(CCID_DRIVER_ERR_UI_TIMEOUT): New.
* scd/ccid-driver.c (bulk_in): Handle PIN input cancel/timeout error.
* scd/iso7816.c (map_sw): Support SW_HOST_UI_CANCELLED and
SW_HOST_UI_TIMEOUT.

--

GnuPG-bug-id: 4614
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-27 15:17:56 +09:00
Werner Koch
7113263a00
agent: Fix YK s/n and prettify the request card prompt for Yubikeys
* agent/divert-scd.c (ask_for_card): Detect and re-format the Yubikey
prompt.
* scd/app.c (app_munge_serialno): Fix Yubikey s/n munging.
(card_get_dispserialno): Ditto.
* scd/app-openpgp.c (get_disp_serialno): Remove.
(get_prompt_info): Use app_get_dispserialno.--
--
2020-11-26 15:56:37 +01:00
Werner Koch
d784e76349
scd: Do not try to use a non-enabled app after card switching.
* scd/app.c (app_dump_state): Also print the refcount.
(maybe_switch_app): Make sure the app exists on the card.
--

When switching the current card and the card does not support the same
apps as the former, we now reset the app to the first one.

Testcase is to use a standard OpenPGP card and a P15 card.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-26 12:16:56 +01:00
Werner Koch
764c69a841
scd: Add special serialno compare for OpenPGP cards.
* scd/app.c (is_same_serialno): New.
(check_application_conflict): Use this.
(select_application): Ditto.
(app_switch_current_card): Ditto.
* scd/app-openpgp.c (check_keyidstr): Ignore the card version and also
compare case insensitive.
--

This is required because we change what we emit as serialno of OpenPGP
cards but existing keys still use the old form of the serial
number (i.e. with a firmware version).

See-commit: 3a8250c020
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-26 09:54:23 +01:00
NIIBE Yutaka
605ab99912 gpg: Report an error for receiving key from agent.
* g10/export.c (do_export_one_keyblock): Report an error.

--

GnuPG-bug-id: 5151
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-26 09:50:40 +09:00
NIIBE Yutaka
9201543708 scd,nks: Fix caching keygrip.
* scd/app-nks.c (keygripstr_from_pk_file): Identify by cfid if
available.

--

GnuPG-bug-id: 5150
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-26 09:35:35 +09:00
Werner Koch
00037f499d
scd:p15: Print the internal card type.
* scd/app-p15.c (read_ef_tokeninfo): Print the internal card type.
2020-11-25 15:48:20 +01:00
Werner Koch
c7b9a4ee43
scd:p15: Improve support for some CardOS based cards.
* scd/iso7816.c (iso7816_read_binary_ext): Add optional arg r_sw and
change callers.
(iso7816_read_record): Factor all code out to ...
(iso7816_read_record_ext): new.
* scd/app-p15.c (select_and_read_binary): Fallback to record reading.
(read_ef_aodf): Clear EOF error.
2020-11-25 15:27:21 +01:00
Werner Koch
60e1ce6612
g13: Add missing header
--
2020-11-25 10:23:55 +01:00
Werner Koch
3a8250c020
scd: Rework the handling of the displayed serial number.
* scd/app.c (app_new_register): Call app_munge_serialno for Yubikeys.
(app_munge_serialno): Handle Yubikey serial numbers.
(card_get_serialno): Remove special Yubikey treatment.  Drop arg
is_canonical.
(app_get_serialno): Clear ERRNO on error.
(card_get_dispserialno): New.  Also change formatting of Yubikey and
OpenPGP numbers to match those printed on the card.
(app_get_dispserialno): New.
* scd/app-openpgp.c (do_getattr): Use app_get_dispserialno.
(yubikey_get_serialno): Remove.
* scd/app-piv.c (get_dispserialno): Remove.
(do_getattr): Use app_get_dispserialno.
--

This patch gets us back to a unique serial number for cards and
provides a stable serial number as printed for Yubikeys.

Because we use a slightly different serial number now for Yubikeys and
cards only supporting OpenPGP card we need to come up with another
change so that the version number of OpenPGP serial numbers are
ignored when comparing card serial numbers.  This is so that existing
stub keys of gpg-agent will continue to work.

GnuPG-bug-id: 5100
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-25 10:23:55 +01:00
NIIBE Yutaka
c3a20c88fb scd: Fix an error return for READKEY.
* scd/command.c (cmd_readkey): Return when error.

--

GnuPG-bug-id: 5150
Suggested-by: Ingo Klöcker
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-25 11:38:15 +09:00
NIIBE Yutaka
006944b856 scd,nks: Fix SEGV for learn for older card.
* scd/app-nks.c (keygripstr_from_pk_file): Set algostr.

--

GnuPG-bug-id: 5144
Fixes-commit: 26da47ae53
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-25 10:32:28 +09:00
Gavin L. Rebeiro
572bcacc28
doc: Fix typos
--
GnuPG-bug-id: 5071

Also fixed one in keyformat.txt [wk].
2020-11-23 12:11:15 +01:00
NIIBE Yutaka
777019faf0 gpg: Change API of agent_scd_serialno.
* g10/call-agent.c (agent_scd_serialno): Extend API to allow with
R_SERIALNO == NULL.
* g10/card-util.c (card_status): Use NULL for agent_scd_serialno.
(factory_reset): Likewise.
* g10/skclist.c (build_sk_list): Likewise.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-20 17:19:45 +09:00
NIIBE Yutaka
cc8b99d18e Fix the previous comment changes help doc string.
* scd/command.c (hlp_learn): Fix the doc string.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-20 17:17:30 +09:00
NIIBE Yutaka
0a265d6498 gpg,agent: Fix comments for KEYPAIRINFO status report.
--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-20 09:56:52 +09:00
Werner Koch
4070f302e4
gpgconf: Also print revision of libksba.
* dirmngr/dirmngr.c (get_revision_from_blurb): Fix detection of empty
string.
(gpgconf_versions): Print ksba revision.
--

The latest Libksba version support retrieving of the revision (commit)
id.  We now use that or print a question mark.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-19 09:09:31 +01:00
NIIBE Yutaka
8ddadbbdbb agent: Fix creating shadow key on card key generation.
* agent/command.c (cmd_readkey): Fix handling --card option.

--

Fixes-commit: 9c719c9c1f
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-19 15:44:59 +09:00
NIIBE Yutaka
e45455d302 gpg: Fix --card-edit command.
* g10/card-util.c (get_info_for_key_operation): Revert the change.

--

Fixes-commit: 157f1de64e
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-19 13:03:29 +09:00
NIIBE Yutaka
d66fb3aa53 build: Update to newer autoconf constructs.
* acinclude.m4 (GNUPG_CHECK_ENDIAN): Use AC_COMPILE_IFELSE instead of
AC_TRY_COMPILE.  Use AC_RUN_IFELSE instead of AC_TRY_RUN.
(GNUPG_BUILD_PROGRAM): Use AS_HELP_STRING instead of AC_HELP_STRING.
* configure.ac: Use AC_USE_SYSTEM_EXTENSIONS instead of AC_GNU_SOURCE.
Use AS_HELP_STRING instead of AC_HELP_STRING.
(AC_ISC_POSIX): Replace by AC_SEARCH_LIBS.
(AC_TYPE_SIGNAL): Remove.
* m4/isc-posix.m4: Remove.
* m4/codeset.m4: Update from gnulib.
* m4/gettext.m4: Update from gnulib.
* m4/lcmessage.m4: Update from gnulib.
* m4/socklen.m4: Update from gnulib.
* m4/ldap.m4: Use AS_HELP_STRING instead of AC_HELP_STRING.
Use AC_LINK_IFELSE instead of AC_TRY_LINK.
Use AC_RUN_IFELSE instead of AC_TRY_RUN.
* m4/gpg-error.m4: Update from libgpg-error.
* m4/readline.m4: Update from libgpg-error.
* m4/npth.m4: Update from npth.
* m4/libassuan.m4: Update from libassuan.
* m4/libgcrypt.m4: Update from libgcrypt.
* m4/ksba.m4: Update from libksba.
* m4/ntbtls.m4: Update from ntbtls.
* common/signal.c [!HAVE_DOSISH_SYSTEM] (init_one_signal): Replace
RETSIGTYPE to void.
[!HAVE_DOSISH_SYSTEM] (got_fatal_signal, got_usr_signal): Likewise.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-18 14:12:51 +09:00
NIIBE Yutaka
aeeb8e975d build: Use modern Autoconf check for types.
* common/types.h: Use HAVE_TYPE_BYTE, HAVE_USHORT_TYPEDEF,
HAVE_ULONG_TYPEDEF, HAVE_U16_TYPEDEF, and HAVE_TYPE_U32.
* configure.ac (byte, ushort, ulong, u16, u32): Use AC_CHECK_TYPES.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-18 13:36:30 +09:00
Werner Koch
e37c2e1844
gpg: Fix the encrypt+sign hash algo preference selection for ECDSA.
* g10/keydb.h (pref_hint): Change from union to struct and add field
'exact'.  Adjust callers.
* g10/pkclist.c (algo_available): Take care of the exact hint.
* g10/sign.c (sign_file): Rework the hash detection from
recipient prefs.
--

This fixes a encrypt+sign case like: One recipient key has SHA512 as
highest ranked hash preference but the the signing key is a 256 bit
curve.  Because we don't want to use a truncated hash with ECDSA, we
need to have an exact match - this is in particular important for
smartcard which check that the hash matches the curves.

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

Ported-from-stable: aeed0b93ff
2020-11-13 16:34:21 +01:00
Werner Koch
e546cc78b7
gpgconf: Yet another fix for --apply-profile.
* tools/gpgconf.c (main): Use gnupg_homedir instead of
default_homedir.  Check for existance of the directory.
--

Fixes-commit: 7d95f2e7e7
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-12 13:09:32 +01:00
Werner Koch
23f1fc766a
scd: Do not print reader status change with --debug cardio.
--

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

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit bd3b698d8e)
2020-11-11 15:23:26 +01:00
Werner Koch
d574213ce2
w32: Replace some fopen by es_fopen.
* agent/protect-tool.c (read_file): Replace fopen by es_fopen.
* dirmngr/dirmngr-client.c (read_pem_certificate):  Ditto.
(read_certificate): Ditto.
* g10/keydb.c (rt_from_file): Ditto.
* kbx/kbxutil.c (read_file): Ditto.
* g10/plaintext.c (get_output_file) [__riscos__]: Remove code.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-11 15:23:22 +01:00
NIIBE Yutaka
dd2703096f gpg: Fix the previous commit.
* g10/delkey.c (do_delete_key): Fix the condition for the error.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-11 09:13:13 +09:00
NIIBE Yutaka
f9bbc75163 gpg: In batch mode, delete-secret-key is not okay without --yes.
* g10/delkey.c (do_delete_key): Emit an error when not --yes.

--

GnuPG-bug-id: 4667
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-10 14:08:24 +09:00
NIIBE Yutaka
9854369a72 gpg: Fix agent_delete_key interaction.
* g10/call-agent.c (agent_delete_key): Set up CTX.

--

Fixes-commit: 20acc7c022
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-10 10:28:48 +09:00
Werner Koch
12fd10791f
card: Run factory-reset in locked stated also in gpg-card.
* tools/card-call-scd.c (scd_apdu): Add more pseudo APDUs.
* tools/card-misc.c (send_apdu): Handle them.
* tools/gpg-card.c (cmd_factoryreset): Use lock commands.
--

This is port of the code used with gpg-card-edit.  Note that the
command "apdu" now also understands some extra keywords.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-09 14:46:35 +01:00
Werner Koch
8fb0d5e3c7
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 13:41:26 +01:00
Werner Koch
e08e1d62d0
gpg: Do not print rejected digest algo notes with --quiet.
* g10/misc.c (print_digest_rejected_note): Do not print in quiet mode.
(print_sha1_keysig_rejected_note): Ditto.
--

GnuPG-bug-id: 4893
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-09 08:32:41 +01:00
NIIBE Yutaka
bf3a9377d1 gpg: Fix SOS handling when exporting SSH key with libgcrypt 1.8.
* g10/export.c (key_to_sshblob): Fix SOS correctly.

--

GnuPG-bug-id: 5116
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-09 11:41:03 +09:00
NIIBE Yutaka
ba4f684167 agent: Fix SOS handling with libgcrypt 1.8.
* agent/cvt-openpgp.c (apply_protection): Handle opaque MPI.

--

GnuPG-bug-id: 5116
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-09 11:04:22 +09:00
Werner Koch
c896112fa3
agent: Minor tweaks to the new genpin inquiry.
* agent/call-pinentry.c (generate_pin): Use STRING random which is
sufficient for a passphrase.
(inq_cb): s/rc/err/.  Do not print two errors in case generate_pin
fails.  Lowercase strings as per GNU standards.
(setup_genpin): Fix translation test.
(setup_qualitybar): Ditto.
--

Our policy is to use VERY_STRONG for a long term public key but not
for symmetric keys.

The GNU standards to demand that strings start with a lowercase
because that seems to be needed if it follows a prefix of for example
"gpg:".  I don't actually like this becuase we need different strings
in interactive and standard mode but the majory of strings in GnuPGare
written this way.  If a translation is necessary it can be done with
an en_GB or so locale.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-06 15:43:08 +01:00
Andre Heinecke
557ddbde32
agent: Add genpin inquiry for pinentry
* agent/call-pinentry.c (agent_get_passphrase): Setup genpin.
(do_getpin): Update with new name for inquire callback.
(inq_quality): Rename to inq_cb and add genpin support.
(inq_cb): Renamed form inq_quality.
(generate_pin): New helper to generate a pin.
(agent_askpin): Fix some typos.
(setup_genpin): Provide new strings for pinentry.

--
This implements the gpg-agent side for generating a pin
especially for symmetric encryption using libgcrypt randomness
and checking it against the gpg-agent constraints.
2020-11-06 14:22:28 +01:00
Ben Kibbey
31e47dfad0 gpg: Add canceled status message.
* common/status.h (STATUS_CANCELED_BY_USER): New.
* g10/passphrase.c (passphrase_to_dek): Send STATUS_CANCELED_BY_USER
instead of STATUS_MISSING_PASSPHRASE when canceled is set.
--

This is to prevent further pinentry tries when the pinentry is canceled
by the user during symmetric decryption.

Signed-off-by: Ben Kibbey <bjk@luxsci.net>
2020-11-05 11:19:15 -08:00
NIIBE Yutaka
f808012ac2 scd: Use lock_slot for apdu_send_direct.
* scd/apdu.c (apdu_send_direct): Use lock_slot.

--

With trylock_slot, it may return SW_HOST_BUSY.  This may occur when
apdu_get_status is called by scd_update_reader_status_file.

Simply using lock_slot is much easier for user of apdu_send_direct.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2020-11-05 16:10:49 +09:00
NIIBE Yutaka
484bafda4d 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>
2020-11-05 16:10:15 +09:00
Werner Koch
f5a81953e1
speedo,w32: Install gpg-check-pattern and example profiles.
* doc/examples/vsnfd.prf: Rename to VS-NfD.prf.
* doc/examples/Automatic.prf: New.
* doc/Makefile.am (examples): Adjust.
* build-aux/speedo/w32/inst.nsi: Install gpg-check-pattern.exe and 3
example files.
* build-aux/speedo/w32/wixlib.wxs: Add new files.
--

Note that we renamed the existing example profile so that kleopatra
shows a nicer name.  In fact the gpg4win installer just copies of
theses file but it is better to maintain them here.

gpg-check-pattern.exe can no be installed because we meanwhile have a
regex lib which works also on Windows.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-04 16:22:44 +01:00
Werner Koch
b7f4e2d71f
g13: Include a now missing header file.
* g13/create.c: Include sysutuls.h
--

This is needed due to the recent switch from stat to gnupg_stat.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-04 16:13:05 +01:00
Werner Koch
7d95f2e7e7
gpgconf: Make sure the homedir exists for --apply-profile.
* tools/gpgconf.c (main) <aApplyDefaults, aApplyProfile>: Create the
standard home directory.
--

This fixes a regression due to the fix for
GnuPG-bug-id: 4867
Before that change gpgsm implictly created the homedir while options
were collected.  It is important to have this so that a login script
can create config files for new users.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-04 16:13:05 +01:00
Werner Koch
dabc314b71
common: Fix duplicate implementation of try_make_homedir.
* g10/openfile.c (try_make_homedir): Move core of the code to ...
* common/homedir.c (gnupg_maybe_make_homedir): new.
* sm/keydb.c (try_make_homedir): Implement using new function.

* common/homedir.c: Include i18n.h.
* po/POTFILES.in: Add common/homedir.c.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-04 16:13:04 +01:00
Andre Heinecke
c8f6f6bbc8
w32: Add another pinentry search path
* common/homedir.c (get_default_pinentry_name): Try ../bin/pinentry.exe

--
In an installation layout where GnuPG is installed as a component
of another software it might be useful to have pinentry placed
in a different bin directory without the forced folder name of
Gpg4win.

(cherry picked from commit b4cb91d5fb)
2020-11-04 13:50:13 +01:00
Andre Heinecke
e2659f4bf6
w32: Add windows subsystem variant of gpgconf
* tools/Makefile.am (gpgconf-w32): New target. Builds gpgconf with
subsystem windows.
* build-aux/speedo/w32/wixlib.wxs: Package it.

--
This allows us to create scripts that call gpgconf without opening
a console. Using subsystem windows is better then to just close
the console after start as it avoids the console flashing up.

(cherry picked from commit c366e04958)
2020-11-04 13:50:13 +01:00
Werner Koch
e8aae18b99
w32: Fix strftime problem on Windows.
* common/gettime.c: Include locale.h.
(asctimestamp): Increase buffer.  On Windows use setlocale.
--

GnuPG-bug-id: 5073
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-03 19:32:11 +01:00
Werner Koch
d1f2a6d9f7
gpg: Switch to AES256 for symmetric encryption in de-vs mode.
* g10/gpg.c (set_compliance_option): For AES256 and SHA256 in de-vs
mode.
* g10/encrypt.c (setup_symkey): Add extra compliance check.
(encrypt_simple): Avoid printing a second error oncplinace failure.
--

Because we used the RFC4880 mode as base for the de-vs mode we got
3DES as symmetric encryption algorithm.  With the default gnupg mode
that was already used.  The new extra compliance checks are added to
detect whether a --personal-cipher-preference or --cipher-algo option
tried to override the algorithms.  They are still possible but now
non-compliant algorithms will throw an error.

Manual testing can be done with commands like this:

  gpg --no-options --compliance=de-vs \
   --personal-cipher-preferences "S1 S7" \
   --pinentry-mode loopback -v --passphrase abc -ac </etc/motd

Here the command fails due to IDEA (S1) being the preferred cipher
algorithm.  Using "--s2k-digest-algo SHA1" instead of
--personal-cipher-preferences will also fail.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-03 15:37:40 +01:00
Werner Koch
e1bafa3574
gpg: Allow setting notations with the empty string as value.
* g10/misc.c (pct_expando): Catch special case of the empty string.
Also map a NULL to the empty string.
* g10/photoid.c (show_photos): Make an empty string used as command
fail.
--

This patch also fixes a segv when calling gpg wrongly like

  gpg -N \-foo@example.org

GnuPG-bug-id: 5117
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-02 17:34:29 +01:00
Werner Koch
6397cf5fbe
build: Remove m4 macro defs which are not anymore used.
* configure.ac (GNUPG_FUNC_MKDIR_TAKES_ONE_ARG): Do not use.
* acinclude.m4 (GNUPG_FUNC_MKDIR_TAKES_ONE_ARG): Remove unused macro
defs.
(GNUPG_CHECK_FAQPROG): Ditto.
(GNUPG_CHECK_DOCBOOK_TO_TEXI): Ditto.
(GNUPG_CHECK_MLOCK): Ditto.

Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-02 16:51:13 +01:00
Werner Koch
15746d60d4
gpg: Do not use weak digest algos if selected by recipient prefs.
* g10/misc.c (is_weak_digest): New.
(print_digest_algo_note): Use it here.
* g10/sig-check.c (check_signature_end_simple): Use it.
* g10/sign.c (hash_for): Do not use recipient_digest_algo if it is in
the least of weak digest algorithm.
--

If a message is signed and encrypted to several recipients, the to be
used digest algorithm is deduced from the preferences of the
recipient.  This is so that all recipients are able to check the the
signature.  However, if the sender has a declared an algorithm as
week, that algorithm shall not be used - in this case we fallback to
the standard way of selecting an algorithm.

Note that a smarter way of selecting the algo is to check this while
figuring out the algorithm - this needs more testing and thus we do it
the simple way.

Reported-by: Phil Pennock
Signed-off-by: Werner Koch <wk@gnupg.org>
2020-11-02 13:45:19 +01:00