* g10/gpgcompose.c: Remove
--
This tool duplicated a lot of code and was hard to maintain. IIRC, it
was part of some Univerity assignment and of no real use anymore.
--
Resolved Conflicts:
* common/asshelp.c: Keep the new code in master for spawing under
Windows.
* g10/Makefile.am: Keep all new file.
* g10/photoid.c: Pass CTRL to pct_expando.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/Makefile.am: Add nPth flags.
* g10/gpg.c: Include npth.h.
(gpg_deinit_default_ctrl): Deinit call-keyboxd local data.
(main): Init nPth.
* g10/keydb-private.h (struct keydb_handle_s): Add field 'kbl' and
remove the search result and the assuan context.
* g10/call-keyboxd.c (struct keyboxd_local_s): Add more fields.
(lock_datastream, unlock_datastream): New.
(gpg_keyboxd_deinit_session_data): Adjust for changed data structures.
(prepare_data_pipe): New.
(open_context): Return kbl instead of an Assuan context. Init mutexes
etc.
(close_context): Merge into ...
(keydb_release): here. Adjust for changed data structures.
(datastream_thread): New.
(keydb_get_keyblock): Implement datastream stuff.
(keydb_search): Ditto.
* common/asshelp.c (wait_for_sock): Add arg connect_flags.
(start_new_service): Set FDPASSING flag for the keyboxd.
--
This code as a lot of rough edges, in particular it relies on a well
behaving keyboxd. We need to add code to shutdown the datastream
reader thread in case of errors and to properly get it up again. We
also need to make really sure that both threads run in lockstep so
that the datastream thread is only active while we are sending a
command to the keyboxd.
We should also see whether we can depend nPth initialization on the
--use-keyboxd option to avoid any problems with nPth.
And we need to test on Windows.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/gpg.c (oUseKeyboxd,oKeyboxdProgram): New consts.
(opts): New options --use-keyboxd and --keyboxd-program.
(main): Implement them.
* g10/keydb.c: Move some defs out to ...
* g10/keydb-private.h: new file.
* g10/keydb.c: prefix function names with "internal" and move original
functions to ...
* g10/call-keyboxd.c: new file. Divert to the internal fucntion if
--use-keyboxd is used. Add a CTRL arg to most fucntions and change
all callers.
* g10/Makefile.am (common_source): Add new files.
(noinst_PROGRAMS): Do bot build gpgcompose.
--
Note that this is just the framework with only a basic implementation
of searching via keyboxd.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/expand-group.c: New
* g10/pkclist.c: Extract expand_group and expand_id into expand-group.c.
* g10/keydb.h: Add prototypes of expand_id and expand_group.
* g10/getkey.c: Use expand_group before resolving key references.
* g10/Makefile.am: Compile expand-group.c.
--
When searching a key by its name, try to expand the provided name in
case it is a GPG group reference. This GPG group resolution is performed
before the individual keys are verified.
This allows key listing using a GPG group reference. In particular, this
modification fixes the encryption to group support in KDE's Kmail which
is broken since version 18.04.
Signed-off-by: Stephan Mueller <stephan.mueller@atsec.com>
- Changed new filename to use a dash instead of an underscore.
- Indendation changes.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/objcache.c: New.
* g10/objcache.h: New.
* g10/Makefile.am (common_source): Add them.
* g10/gpg.c: Include objcache.h.
(g10_exit): Call objcache_dump_stats.
* g10/getkey.c: Include objcache.h.
(get_primary_uid, release_keyid_list): Remove.
(cache_user_id): Remove.
(finish_lookup): Call the new cache_put_keyblock instead of
cache_user_id.
(get_user_id_string): Remove code for mode 2.
(get_user_id): Implement using cache_get_uid_bykid.
--
This generic caching module is better than the ad-hoc code we used in
getkey.c. More cleanup in getkey is still required but it is a
start. There is also a small performance increase with the new cache:
With a large keyring and --list-sigs I get these numbers:
| | before | after |
|------+------------+------------|
| real | 14m1.028s | 12m16.186s |
| user | 2m18.484s | 1m36.040s |
| sys | 11m42.420s | 10m40.044s |
Note the speedup in the user time which is due to the improved cache
algorithm. This is obvious, because the old cache was just a long
linked list; the new cache are two hash tables.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/cipher.c (cipher_filter): Rename to cipher_filter_cfb.
* g10/cipher-aead.c: New. Right now only with a stub function.
* g10/Makefile.am (gpg_sources): Add file.
* g10/encrypt.c (encrypt_simple): Push either cipher_filter_cfb or
cipher_filter_aead.
(encrypt_crypt): Ditto.
(encrypt_filter): Ditto.
* g10/sign.c (sign_symencrypt_file): Ditto.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/Makefile.am (tofu_source) [USE_TOFU]: Remove sqrtu32.h and
sqrtu32.c.
* g10/sqrtu32.h, g10/sqrtu32.c: Removed files.
* g10/tofu.c: Compare squares instead of square roots.
--
The original code is a factor 11.5 slower than using libm's sqrt(),
which in turn is a factor 3.5 slower than using one multiplication
on the other side of the comparison. Also, it's much simpler now.
Signed-off-by: Marcus Brinkmann <mb@g10code.com>
* g10/Makefile.am (gpg_SOURCES): Add new file.
* g10/keyedit.c (NODFLG_*): Move flags to the new header file.
(print_one_sig): Export symbol and rename accordingly.
(print_and_check_one_sig): Adapt accordingly.
(check_all_keysigs): Likewise.
* g10/keyedit.h: New file.
* g10/main.h: Drop declarations, include new header.
GnuPG-bug-id: 2236
Signed-off-by: Justus Winter <justus@g10code.com>
* Makefile.am (TESTS_ENVIRONMENT): New variable.
(check-all): New phony target to run all tests.
* tests/gpgme/gpgme-defs.scm (have-gpgme?): New function that tests
whether the GPGME test suite is available instead of exiting the
process.
* tests/gpgscm/init.scm (export): New macro.
* tests/gpgscm/tests.scm (run-tests): New function.
(load-tests): Likewise.
* tests/gpgme/run-tests.scm: Simplify and move the parsing of the list
of tests to 'all-tests.scm'.
* tests/gpgsm/run-tests.scm: Likewise.
* tests/migrations/run-tests.scm: Likewise.
* tests/openpgp/run-tests.scm: Likewise.
* tests/gpgme/Makefile.am: To select the tests to run, use the
variable 'TESTS'. This harmonizes the interface with the automake
test suite.
* tests/gpgsm/Makefile.am: Likewise.
* tests/migrations/Makefile.am: Likewise.
* tests/openpgp/Makefile.am: Likewise.
* tests/openpgp/README: Likewise.
* agent/all-tests.scm: New file.
* common/all-tests.scm: Likewise.
* g10/all-tests.scm: Likewise.
* g13/all-tests.scm: Likewise.
* tests/gpgme/all-tests.scm: Likewise.
* tests/gpgsm/all-tests.scm: Likewise.
* tests/migrations/all-tests.scm: Likewise.
* tests/openpgp/all-tests.scm: Likewise.
* tests/run-tests.scm: Likewise.
--
This change allows us to run all tests in parallel and write one XML
report capturing the results of every test. It also lays the
foundation to parametrize test suites.
Signed-off-by: Justus Winter <justus@g10code.com>
* build-aux/speed/w32/inst.nsi: stop installing skeleton files.
* doc/gpg.texi: stop documenting skeleton files.
* g10/Makefile.am: stop installing skeleton files.
* g10/openfile.c (copy_options_file): Remove.
(try_make_homedir): do not call copy_options_file.
--
The defaults for gpg and dirmngr are good. Both programs should work
fine for the simple case without any config file. The skeleton config
files were being copied at first use (when the defaults are fine).
But when the user needs to fiddle with them (after they've become
sophisticated users), they're likely out of date because gpg has been
upgraded since then. So they're used for documentation, but they're
stale documentation, which is probably worse than a clean empty file.
GnuPG-bug-id: 3086
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
--
Locate every resource and every script used in the tests using a path
relative to the top of the source tree.
This is a purely mechanical change, mostly done using regular
expressions, with a few manual fixups here and there.
Signed-off-by: Justus Winter <justus@g10code.com>
* g10/tofu.c: Include "sqrtu32.h".
(struct tofu_dbs_s.s): Rename get_trust_gather_other_keys to
get_trust_gather_signature_stats. Add new field
get_trust_gather_encryption_stats.
(initdb): Create the encryptions table.
(ask_about_binding): Show the encryption statistics too.
(tofu_register): Rename from this...
(tofu_register_signature): ... to this and update callers.
(tofu_register_encryption): New function.
(write_stats_status): Add parameters encryption_count,
encryption_first_done and encryption_most_recent. Update callers.
Compute the trust using the euclidean distance of the signature and
signature count. Compare with twice the threshold. Include
encryption count information in the TFS and TOFU_STATS lines.
(show_statistics): Also get information about the encrypted messages.
* g10/trustdb.c (tdb_get_validity_core): Use it.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/sqlite.c: Rename to gpgsql.c. Change function prefixes to
gpgsql_.
* g10/sqlite.h: Rename to gpgsql.h.
* g10/tofu.c: Adjust for changes.
--
We used for our own extensions symbols with an sqlite_ names prefix.
This may in theory lead to duplicated symbols but more important, it
is harder to understand what is from gpg and what is from libsqlite.
Signed-off-by: Werner Koch <wk@gnupg.org>
* configure.ac (USE_GPG2_HACK): New ac_define am_conditional.
* common/homedir.c (gnupg_module_name): Replace use of macro
NAME_OF_INSTALLED_GPG.
* g10/keygen.c (generate_keypair): Ditto.
* g10/Makefile.am (bin_PROGRAMS): Remove.
(noinst_PROGRAMS): Add gpg or gpg2 and gpgv or gpg2.
(gpg2_hack_list): New.
(use_gpg2_hack): New.
(gpg2_SOURCES): Rename to gpg_SOURCES.
(gpgv2_SOURCES): Rename to gpgv_SOURCES.
(gpg2_LDADD): Rename to gpg_LDADD.
(gpgv2_LDADD): Rename to gpgv_LDADD.
(gpg2_LDFLAGS): Rename to gpg_LDFLAGS.
(gpgv2_LDFLAGS): Rename to gpgv2_LDFLAGS.
(install-exec-hook): Remove WinCE specific rules and add new rules.
(uninstall-local): Uninstall gpg/gpg2 and gpgv/gpgv2.
* tests/openpgp/Makefile.am (required_pgms): s/gpg2/gpg/.
* tests/openpgp/defs.inc: Ditto.
* tests/openpgp/gpgtar.test: Ditto.
* tests/openpgp/mkdemodirs: Ditto.
* tests/openpgp/signdemokey: Ditto.
* Makefile.am (DISTCHECK_CONFIGURE_FLAGS): Remove obsolete
--enable-mailto, add --enable-gpg2-is-gpg.
--
Although we need to duplicate some automake generated code this method
allows to easily switch the name of the installed target using the
configure option "--enable-gpg2-is-gpg".
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/Makefile.am (EXTRA_DIST): Add t-stutter-data.asc.
(module_tests): Add t-stutter.
(t_stutter_SOURCES): New variable.
(t_stutter_LDADD): New variable.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
Add a test to check that the Mister and Zuccerato attack described in
"An Attack on CFB Mode Encryption As Used by OpenPGP" works.
* g10/packet.h: Include "util.h".
* g10/encrypt.c (encrypt_seskey): Don't mark as static.
* g10/gpgcompose.c: New file.
* g10/Makefile.am (noinst_PROGRAMS): Add gpgcompose.
(gpg2_SOURCES): Split everything but gpg.c into...
(gpg_sources): ... this new variable.
(gpgcompose_SOURCES): New variable.
(gpgcompose_LDADD): Likewise.
(gpgcompose_LDFLAGS): Likewise.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* g10/keyring.c (keyring_get_keyblock): If we encounter a legacy
packet after already having some non-legacy packets, then treat the
legacy packet as a keyblock boundary, not as part of the keyblock.
* g10/t-keydb-get-keyblock.c: New file.
* g10/t-keydb-get-keyblock.gpg: New file.
* g10/Makefile.am (EXTRA_DIST): Add t-keydb-get-keyblock.gpg.
(module_tests): Add t-keydb-get-keyblock.
(t_keydb_get_keyblock_SOURCES): New variable.
(t_keydb_get_keyblock_LDADD): Likewise.
--
Signed-off-by: Neal H. Walfield
GnuPG-bug-id: 2151
* g10/tofu.c (sqlite3_exec_printf): Move from here...
* g10/sqlite.c (sqlite3_exec_printf): ... to this new file. Don't
mark as static.
* g10/tofu.c (sqlite3_stepx): Move from here...
* g10/sqlite.c (sqlite3_stepx): ... to this new file. Don't
mark as static.
* g10/tofu.c (enum sqlite_arg_type): Move from here...
* g10/sqlite.h (enum sqlite_arg_type): ... to this new file.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
* configure.ac: Add option --dsiable-tofu and --disable-sqlite.
(NEED_SQLITE_VERSION): New var.
(USE_TOFU): New ac_define and am_conditional.
* autogen.sh (build-w32): Add PKG_CONFIG_LIBDIR to configure so that
pkg-config find the correct .pc file.
* g10/Makefile.am (tofu_source): New. Build only if enabled.
* g10/gpg.c (parse_trust_model)[!USE_TOFU]: Disable tofu models.
(parse_tofu_policy)[!USE_TOFU]: Disable all.
(parse_tofu_db_format)[!USE_TOFU]: Disable all.
(main) <aTOFUPolicy>[!USE_TOFU]: Skip.
* g10/keyedit.c (show_key_with_all_names_colon)[!USE_TOFU]: Do not
call tofu functions.
* g10/keylist.c (list_keyblock_colon)[!USE_TOFU]: Ditto.
* g10/trustdb.c (tdb_get_validity_core)[!USE_TOFU]: Skip tofu
processing.
--
This allows to build a minimal version of GnuPG. It is also currently
required to build for Windows.
Signed-off-by: Werner Koch <wk@gnupg.org>
* configure.ac: Check for sqlite3.
(SQLITE3_CFLAGS): AC_SUBST it.
(SQLITE3_LIBS): Likewise.
* g10/Makefile.am (AM_CFLAGS): Add $(SQLITE3_CFLAGS).
(gpg2_SOURCES): Add tofu.h and tofu.c.
(gpg2_LDADD): Add $(SQLITE3_LIBS).
* g10/tofu.c: New file.
* g10/tofu.h: New file.
* g10/options.h (trust_model): Define TM_TOFU and TM_TOFU_PGP.
(tofu_db_format): Define.
* g10/packet.h (PKT_signature): Add fields digest and digest_len.
* g10/gpg.c: Include "tofu.h".
(cmd_and_opt_values): Declare aTOFUPolicy, oTOFUDefaultPolicy,
oTOFUDBFormat.
(opts): Add them.
(parse_trust_model): Recognize the tofu and tofu+pgp trust models.
(parse_tofu_policy): New function.
(parse_tofu_db_format): New function.
(main): Initialize opt.tofu_default_policy and opt.tofu_db_format.
Handle aTOFUPolicy, oTOFUDefaultPolicy and oTOFUDBFormat.
* g10/mainproc.c (do_check_sig): If the signature is good, copy the
hash to SIG->DIGEST and set SIG->DIGEST_LEN appropriately.
* g10/trustdb.h (get_validity): Add arguments sig and may_ask. Update
callers.
(tdb_get_validity_core): Add arguments sig and may_ask. Update
callers.
* g10/trust.c (get_validity) Add arguments sig and may_ask. Pass them
to tdb_get_validity_core.
* g10/trustdb.c: Include "tofu.h".
(trust_model_string): Handle TM_TOFU and TM_TOFU_PGP.
(tdb_get_validity_core): Add arguments sig and may_ask. If
OPT.TRUST_MODEL is TM_TOFU or TM_TOFU_PGP, compute the TOFU trust
level. Combine it with the computed PGP trust level, if appropriate.
* g10/keyedit.c: Include "tofu.h".
(show_key_with_all_names_colon): If the trust mode is tofu or
tofu+pgp, then show the trust policy.
* g10/keylist.c: Include "tofu.h".
(public_key_list): Also show the PGP stats if the trust model is
TM_TOFU_PGP.
(list_keyblock_colon): If the trust mode is tofu or
tofu+pgp, then show the trust policy.
* g10/pkclist.c: Include "tofu.h".
* g10/gpgv.c (get_validity): Add arguments sig and may_ask.
(enum tofu_policy): Define.
(tofu_get_policy): New stub.
(tofu_policy_str): Likewise.
* g10/test-stubs.c (get_validity): Add arguments sig and may_ask.
(enum tofu_policy): Define.
(tofu_get_policy): New stub.
(tofu_policy_str): Likewise.
* doc/DETAILS: Describe the TOFU Policy field.
* doc/gpg.texi: Document --tofu-set-policy, --trust-model=tofu,
--trust-model=tofu+pgp, --tofu-default-policy and --tofu-db-format.
* tests/openpgp/Makefile.am (TESTS): Add tofu.test.
(TEST_FILES): Add tofu-keys.asc, tofu-keys-secret.asc,
tofu-2183839A-1.txt, tofu-BC15C85A-1.txt and tofu-EE37CF96-1.txt.
(CLEANFILES): Add tofu.db.
(clean-local): Add tofu.d.
* tests/openpgp/tofu.test: New file.
* tests/openpgp/tofu-2183839A-1.txt: New file.
* tests/openpgp/tofu-BC15C85A-1.txt: New file.
* tests/openpgp/tofu-EE37CF96-1.txt: New file.
* tests/openpgp/tofu-keys.asc: New file.
* tests/openpgp/tofu-keys-secret.asc: New file.
--
Signed-off-by: Neal H. Walfield <neal@g10code.com>.
* g10/dirmngr-conf.skel: New.
* g10/Makefile.am (EXTRA_DIST): Add file.
(install-data-local, uninstall-local): Install that file.
* g10/openfile.c (copy_options_file): Add arg "name", return a value,
simplify with xstrconcat, and factor warning message out to:
(try_make_homedir): here. Also install dirmngr.conf.
* g10/options.skel: Remove --keyserver entry.
--
The option --keyserver in gpg has been deprecated in favor of
--keyserver in dirmngr.conf. Thus we need to install a skeleton file
for dirmngr to set a default keyserver.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/test.c: Include string.h.
(prepend_srcdir): New. Taken from Libgcrypt.
(test_free): New.
* g10/t-keydb.c (do_test): Malloc the filename.
* g10/Makefile.am (AM_CPPFLAGS): Remove -DSOURCE_DIR
(EXTRA_DIST): Add t-keydb-keyring.kbx.
--
Using SOURCE_DIR should in general work but we have seen problems when
doing this in Libgcrypt. Using the srcdir variable gives us anyway
more flexibility and aligns with the way we do it in tests/openpgp.
Signed-off-by: Werner Koch <wk@gnupg.org>
* kbx/keybox.h (KEYBOX_WITH_X509): Do not define.
* sm/Makefile.am (AM_CPPFLAGS): Define it here.
(common_libs): Change to libkeybox509.a
* g10/Makefile.am (AM_CFLAGS): remove KSBA_CFLAGS.
(gpg2_LDADD, gpgv2_LDADD): Remove KSBA_LIBS
* kbx/Makefile.am (noinst_LIBRARIES): Add libkeybox509.a.
(libkeybox509_a_SOURCES): New.
(libkeybox_a_CFLAGS): New.
(libkeybox509_a_CFLAGS): New.
(kbxutil_CFLAGS): New.
* kbx/keybox-search.c (has_keygrip) [!KEYBOX_WITH_X509]: Declare args
as unused.
--
There is no real need to link to Libksba in gpg.
Signed-off-by: Werner Koch <wk@gnupg.org>
* Makefile.am: Always build kbx/
* g10/Makefile.am (AM_CFLAGS): Include KSBA_CFLAGS.
--
Note that "make check" still prints a warning.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/dns-cert.h: Move to ../dirmngr/.
* common/dns-cert.c: Move to ../dirmngr/. Change args to return the
key as a buffer.
* common/t-dns-cert.c: Move to ../dirmngr/.
* common/pka.c, common/pka.h, common/t-pka.c: Remove.
* dirmngr/server.c (data_line_cookie_write): Factor code out to
data_line_write and make it a wrapper for that.
(data_line_write): New.
(cmd_dns_cert): New.
(register_commands): Register new command.
* g10/Makefile.am (LDADD): Remove DNSLIBS.
* g10/call-dirmngr.c (dns_cert_parm_s): New.
(dns_cert_data_cb, dns_cert_status_cb): New.
(gpg_dirmngr_dns_cert): New.
(gpg_dirmngr_get_pka): New.
* g10/gpgv.c (gpg_dirmngr_get_pka): New dummy function.
* g10/keyserver.c (keyserver_import_cert): Replace get_dns_cert by
gpg_dirmngr_dns_cert.
(keyserver_import_pka): Replace get_pka_info by gpg_dirmngr_get_pka.
* g10/mainproc.c: Include call-dirmngr.h.
(pka_uri_from_sig): Add CTX arg. Replace get_pka_info by
gpg_dirmngr_get_pka.
--
With this patch gpg does not do any network access itself but uses
dirmngr for that. Note that we need to keep linking to NETLIBS due to
the logging code and because we need TCP for our socket emulation
under Windows. Probably also required for Solaris etc.
Signed-off-by: Werner Koch <wk@gnupg.org>
* g10/mailbox.c: Move to ...
* common/mbox-util.c: new file.
* common/mbox-util.h: New. Include where needed.
* g10/t-mailbox.c: Move to ...
* common/t-mbox-util.c: new file.
--
This will make it easier to use the code by other modules in common/.
* g10/gpg.w32-manifest.in: New.
* g10/gpg-w32info.rc: Add manifest.
* g10/Makefile.am (EXTRA_DIST): Add manifest.
(gpg-w32info.o): Depend on manifest.
* configure.ac (BUILD_VERSION): New.
(AC_CONFIG_FILES): Add manifest.
--
There are no dependencies yet defined - we need to do this for the
libs first.
Signed-off-by: Werner Koch <wk@gnupg.org>
* gl/: Remove entire tree.
* configure.ac: Remove gnulib tests and the gl/ Makefile.
(setenv): Add to AC_CHECK_FUNCS.
* autogen.rc (extra_aclocal_flags): Set to empty.
* Makefile.am (ACLOCAL_AMFLAGS): Remove -I gl/m4
(SUBDIRS): Remove gl/.
* agent/Makefile.am (common_libs): Remove ../gl/gnulib.a
* common/Makefile.am (t_common_ldadd): Ditto.
* dirmngr/Makefile.am (dirmngr_LDADD): Ditto.
(dirmngr_ldap_LDADD, dirmngr_client_LDADD): Ditto.
* g10/Makefile.am (needed_libs): Ditto.
* g13/Makefile.am (g13_LDADD): Ditto.
* kbx/Makefile.am (kbxutil_LDADD): Ditto.
($(PROGRAMS)): Ditto.
* scd/Makefile.am (scdaemon_LDADD): Ditto.
* sm/Makefile.am (common_libs): Ditto.
* tools/Makefile.am (common_libs, commonpth_libs): Ditto.
* agent/gpg-agent.c: Remove "mkdtemp.h"
* g10/exec.c: Ditto.
* scd/scdaemon.c: Ditto.
* tools/symcryptrun.c: Ditto.
* common/sysutils.c: Remove "setenv.h"
* common/t-timestuff.c: Use putenv if setenv is not available.
--
gnulib has always been a cause of trouble in GnuPG because we used
only a very few functions and the complex include machinery of gnulib
is quite complex and the cause for many build problems for example on
OS X. This is not gnulib's fault but due to our limited use of gnulib
and that we only rarely update the gnulib code to avoid regressions.
In part two we will address the functions
mkdtemp
setenv
unsetenv
strpbrk
which may bot be implemented on all platforms. They are not required
on a libc based system.
Signed-off-by: Werner Koch <wk@gnupg.org>
