Commit Graph

4593 Commits

Author SHA1 Message Date
Werner Koch 7adeae3ba3 gpg: Minor doc enhancement
--
2014-04-30 21:14:28 +02:00
NIIBE Yutaka 21dab64030 ECC Fixes.
* agent/cvt-openpgp.c (get_keygrip, convert_secret_key)
(convert_transfer_key): Follow newer (>= 1.6) libgcrypt API, which
does not distinguish the detail.
(do_unprotect, convert_from_openpgp_main): Don't call
map_pk_openpgp_to_gcry, as it's the value of libgcrypt API already and
not the value defined by OpenPGP.
(convert_to_openpgp): It's "ecc".
* agent/gpg-agent.c (map_pk_openpgp_to_gcry): Remove.
* g10/call-agent.c (agent_pkdecrypt): Fix off-by-one error.
* g10/pubkey-enc.c (get_it): Fix swapping the fields error.
2014-04-28 10:36:16 +09:00
Werner Koch fdd938a5bb gpg: Pass --homedir to gpg-agent.
* agent/gpg-agent.c (main): Make sure homedir is absolute.
* common/asshelp.c (lock_spawning): Create lock file with an absolute
name.
(start_new_gpg_agent): Use an absolute name for the socket and pass
option --homedir to the agent.
(start_new_dirmngr): Use an absolute name for the --homedir.
--

This patch makes gpg's --homedir option behave again like in older
versions.  This is done by starting a new agent for each different
home directory.  Note that this assumes --use-standard-socket is used
which is the default for 2.1.
2014-04-22 16:59:06 +02:00
Werner Koch 71a54313ad common: Add functions make_absfilename and make_absfilename_try.
* common/stringhelp.c (do_make_filename): Add modes 2 and 3.
(make_absfilename): New.
(make_absfilename_try): New.
2014-04-22 15:58:33 +02:00
Werner Koch 1a87edab66 common: Add function gnupg_getcwd.
* tools/gpg-connect-agent.c (gnu_getcwd): Move to ...
* common/sysutils.c (gnupg_getcwd): .. here.
* tools/gpg-connect-agent.c (get_var_ext): Use gnupg_getcwd.
2014-04-22 15:02:05 +02:00
Werner Koch ffa39be5eb gpg: Print a warning if GKR has hijacked gpg-agent.
* g10/call-agent.c (check_hijacking): New.
(start_agent): Call it.
(membuf_data_cb, default_inq_cb): Move more to the top.
--

Note that GUIs may use the gpg status line

[GNUPG:] ERROR check_hijacking 33554509

to detect this and print an appropriate warning.
2014-04-22 12:50:15 +02:00
Werner Koch e184a11f94 gpg: New %U expando for the photo viewer.
* g10/photoid.c (show_photos): Set namehash.
* g10/misc.c (pct_expando): Add "%U" expando.
--

This makes is possible to extract all photos ids from a key to
different files.
2014-04-17 21:44:09 +02:00
Werner Koch b8a91ebf46 common: Add z-base-32 encoder.
* common/zb32.c: New.
* common/t-zb32.c: New.
* common/Makefile.am (common_sources): Add zb82.c
(module_tests): Add t-zb32.
2014-04-17 21:09:10 +02:00
Werner Koch a34afa8f20 Two minor code cleanups and one NULL deref on error fix.
* common/estream.c (es_freopen): Remove useless check for STREAM.
* kbx/keybox-blob.c (_keybox_create_x509_blob): Remove useless check
for BLOB.
* tools/sockprox.c (run_proxy): Do not fclose(NULL).
--

Found by Hans-Christoph Steiner with cppcheck.
2014-04-16 10:18:17 +02:00
Werner Koch db3b528239 gpg: Re-enable secret key deletion.
* g10/call-agent.c (agent_delete_key): New.
* g10/keydb.h (FORMAT_KEYDESC_DELKEY): New.
* g10/passphrase.c (gpg_format_keydesc): Support new format.
* g10/delkey.c (do_delete_key): Add secret key deletion.
2014-04-15 19:44:50 +02:00
Werner Koch d25d00b89e gpg: Re-indent a file.
* g10/delkey.c: Re-indent.
(do_delete_key, delete_keys): Change return type top gpg_error_t.
2014-04-15 19:44:48 +02:00
Werner Koch c4d983239a gpg: Fix regression in secret key export.
* agent/cvt-openpgp.c (convert_to_openpgp): Fix use
gcry_sexp_extract_param.
* g10/export.c (do_export_stream): Provide a proper prompt to the
agent.
--

NB: The export needs more work, in particular the ECC algorithms.
2014-04-15 19:44:42 +02:00
Werner Koch e549799db6 gpg: Change pinentry prompt to talk about "secret key".
* g10/passphrase.c (gpg_format_keydesc): Add mode 2.  Change strings.
* g10/keydb.h (FORMAT_KEYDESC_NORMAL, FORMAT_KEYDESC_IMPORT)
(FORMAT_KEYDESC_EXPORT): New.  Use them for clarity.
--

The use of the term "certificate" was more confusing than helpful.
2014-04-15 19:29:57 +02:00
Werner Koch e3a4ff89a0 agent: Add command DELETE_KEY.
* agent/command.c (cmd_delete_key): New.
* agent/findkey.c (modify_description): Add '%C' feature.
(remove_key_file): New.
(agent_delete_key): New.
* agent/command-ssh.c (search_control_file): Make arg R_DISABLE
optional.

* configure.ac: Require libgpg-error 1.13.
2014-04-15 17:03:54 +02:00
NIIBE Yutaka 3132bd90dc scd: EdDSA support.
* 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.
2014-04-09 09:30:19 +09:00
Werner Koch db85feceaf dirmngr: Fix compiler warning.
* common/mischelp.h (JNLIB_GCC_HAVE_PUSH_PRAGMA): New.
* dirmngr/dirmngr.c (handle_tick): Factor time check out to ...
(time_for_housekeeping_p): new.
--

I am not sure whether that y2038 hack is really useful but it might
make me smile in my retirement.
2014-04-08 17:06:17 +02:00
Werner Koch b4cf4686f7 gpgconf: Add command --launch.
* tools/gpgconf.c: Add command --launch.
* tools/gpgconf-comp.c (gc_component_launch): New.

Signed-off-by: Werner Koch <wk@gnupg.org>
2014-04-08 15:57:14 +02:00
Werner Koch 36dfc37e43 scd: Silent compiler warnings about unused variables.
* scd/app-openpgp.c (build_ecdsa_privkey_template): Mark unused arg.
(ecdh_writekey): Mark unused args.

Signed-off-by: Werner Koch <wk@gnupg.org>
2014-04-08 10:02:08 +02:00
NIIBE Yutaka 5ff6d0c25e agent: Support EdDSA.
* agent/pksign.c (agent_pksign_do): Handle EdDSA signature.
2014-04-08 12:15:20 +09:00
NIIBE Yutaka 40c3b0741e g10: EdDSA support.
* g10/keyid.c (keygrip_from_pk): Compute keygrip of EdDSA key.
* g10/keygen.c (generate_subkeypair): Ed25519 is for EdDSA.
* common/openpgp-oid.c (oid_ed25519): Update.
2014-04-08 11:59:39 +09:00
NIIBE Yutaka 513c67b746 agent: EdDSA support for SSH.
* agent/command-ssh.c (ssh_signature_encoder_eddsa): Signature is
two 32-byte opaque data which should not be interpreted as number.
2014-04-04 16:33:00 +09:00
Werner Koch b6786cc3ec gpg: Add commands --quick-sign-key and --quick-lsign-key.
* g10/gpg.c (main): Add commands --quick-sign-key and
--quick-lsign-key.
* g10/keyedit.c (sign_uids): Add args FP and QUICK.
(keyedit_quick_sign): New.
(show_key_with_all_names): Add arg NOWARN.
2014-03-27 16:33:40 +01:00
Werner Koch 4f50ec98dd Change some keyedit functions to allow printing to arbitrary streams.
* common/ttyio.c (tty_print_string): Add optional arg FP. Change all
callers.
(tty_print_utf8_string2): Ditto.
* g10/keyedit.c (show_prefs):  Ditto.
(show_key_with_all_names_colon): Ditto.
(show_names): Ditto.
* g10/keylist.c (print_revokers): Ditto.
(print_fingerprint): Ditto.
2014-03-27 12:59:55 +01:00
Werner Koch 5c2a50cdc9 agent: Replace es_mopen by es_fopenmem for ssh.
* agent/command-ssh.c (ssh_read_key_public_from_blob): Use
es_fopenmem.
(ssh_handler_request_identities): Ditto.
(ssh_request_process): Ditto.
--

es_fopenmem is easier to understand than the more general function
es_mopen.  Thus we better use the former for clarity.
2014-03-23 13:42:53 +01:00
Werner Koch fc3e70c113 agent: Put ssh key type as comment into sshcontrol.
* agent/command-ssh.c (ssh_key_type_spec): Add field name.
(ssh_key_types): Add human readable names.
(add_control_entry): Add arg SPEC and print key type as comment.
(ssh_identity_register): Add arg SPEC.
(ssh_handler_add_identity): Add var SPEC and pass ssh_receive_key.
2014-03-22 21:28:35 +01:00
Werner Koch 072432883e agent: Support the Ed25519 signature algorithm for ssh.
* agent/command-ssh.c (SPEC_FLAG_IS_EdDSA): New.
(ssh_key_types): Add entry for ssh-ed25519.
(ssh_identifier_from_curve_name): Move to the top.
(stream_read_skip): New.
(stream_read_blob): New.
(ssh_signature_encoder_rsa): Replace MPIS array by an s-exp and move
the s-exp parsing to here.
(ssh_signature_encoder_dsa): Ditto.
(ssh_signature_encoder_ecdsa): Ditto.
(ssh_signature_encoder_eddsa): New.
(sexp_key_construct): Rewrite.
(ssh_key_extract): Rename to ...
(ssh_key_to_blob): .. this and rewrite most of it.
(ssh_receive_key): Add case for EdDSA.
(ssh_convert_key_to_blob, key_secret_to_public): Remove.
(ssh_send_key_public): Rewrite.
(ssh_handler_request_identities): Simplify.
(data_sign): Add rename args.  Add new args HASH and HASHLEN.  Make
use of es_fopenmen and es_fclose_snatch.  Remove parsing into MPIs
which is now doe in the sgnature encoder functions.
(ssh_handler_sign_request): Take care of Ed25519.
(ssh_key_extract_comment): Rewrite using gcry_sexp_nth_string.
--

To make the code easier readable most of the Ed25591 work has been
done using a new explicit code path.  Warning: Libgcrypt 1.6.1 uses a
non optimized implementation for Ed25519 and timing attacks might be
possible.

While working on the code I realized that it could need more rework;
it is at some places quite baroque and more complicated than needed.
Given that we require Libgcrypt 1.6 anyway, we should make more use of
modern Libgcrypt functions.
2014-03-22 21:12:46 +01:00
Werner Koch a77ed0f266 agent: Cleanups to prepare implementation of Ed25519.
* agent/cvt-openpgp.c: Remove.
(convert_to_openpgp): Use gcry_sexp_extract_param.
* agent/findkey.c (is_eddsa): New.
(agent_is_dsa_key, agent_is_eddsa_key): Check whether ecc means EdDSA.
* agent/pksign.c (agent_pksign_do): Add args OVERRIDEDATA and
OVERRIDEDATALEN.

* common/ssh-utils.c (is_eddsa): New.
(get_fingerprint): Take care or EdDSA.
2014-03-22 20:52:03 +01:00
Werner Koch 6376227a31 tools: Fix NULL deref in gpg-connect-agent.
* tools/gpg-connect-agent.c (handle_inquire): Do not pass NULL to
strlen.
2014-03-18 16:49:38 +01:00
Werner Koch 6c058fac65 dirmngr: Resurrect hosts in the HKP hosttable.
* dirmngr/dirmngr.c (HOUSEKEEPING_INTERVAL): New.
(housekeeping_thread): New.
(handle_tick): Call new function.
* dirmngr/ks-engine-hkp.c (RESURRECT_INTERVAL): New.
(struct hostinfo_s): Add field died_at and set it along with the dead
flag.
(ks_hkp_print_hosttable): Print that info.
(ks_hkp_housekeeping): New.
--

The resurrection gives the host a chance to get back to life the next
time a new host is selected.
2014-03-18 11:07:05 +01:00
Werner Koch 04e304278c common: New function elapsed_time_string.
* common/gettime.c (elapsed_time_string): New.
2014-03-18 11:02:50 +01:00
Werner Koch f90cfe6b66 gpg: Reject signatures made with MD5.
* g10/gpg.c: Add option --allow-weak-digest-algos.
(main): Set option also in PGP2 mode.
* g10/options.h (struct opt): Add flags.allow_weak_digest_algos.
* g10/sig-check.c (do_check): Reject MD5 signatures.
* tests/openpgp/defs.inc: Add allow_weak_digest_algos to gpg.conf.
2014-03-17 18:14:23 +01:00
Werner Koch 1e2e39c575 gpg: Make --auto-key-locate work again with keyservers.
* dirmngr/ks-engine-hkp.c (ks_hkp_get): Allow exact search mode.
* g10/keyserver.c (keyserver_import_name): Implement.
(keyserver_get): Use exact mode for name based import.
(keyserver_get): Add args R_FPR and R_FPRLEN.  Change all callers.
2014-03-17 15:39:33 +01:00
Werner Koch 1d642d3ca8 gpg: New mechanism "clear" for --auto-key-locate.
* g10/getkey.c (parse_auto_key_locate): Implement "clear".
2014-03-17 15:36:15 +01:00
Werner Koch 2223eaefaf gpg-connect-agent: Make it easier to connect to the dirmngr.
* tools/gpg-connect-agent.c: Add options --dirmngr and
--dirmngr-program.
2014-03-14 19:25:58 +01:00
Werner Koch 59b4fb5f49 dirmngr: Make use of IPv4 and IPV6 more explicit.
* common/http.c (connect_server): Handle the new flags.
* common/http.h (HTTP_FLAG_IGNORE_IPv4, HTTP_FLAG_IGNORE_IPv4): New.
* dirmngr/ks-engine-hkp.c (map_host): Add arg r_httpflags.
(make_host_part): Ditto.
(send_request): Add arg httpflags.
(ks_hkp_search, ks_hkp_get, ks_hkp_put): Handle httpflags.
2014-03-14 17:00:10 +01:00
Werner Koch d7fbefeb82 dirmngr: Do not use brackets around legacy IP addresses.
* dirmngr/ks-engine-hkp.c (my_getnameinfo): Change args to take a
complete addrinfo.  Bracket only v6 addresses.  Change caller.
2014-03-14 16:22:54 +01:00
Werner Koch a401f768ca gpg: Print the actual used keyserver address.
* dirmngr/ks-engine-hkp.c (ks_hkp_search, ks_hkp_get): Print SOURCE
status lines.
* g10/call-dirmngr.c (ks_status_parm_s): New.
(ks_search_parm_s): Add field stparm.
(ks_status_cb): New.
(ks_search_data_cb): Send source to the data callback.
(gpg_dirmngr_ks_search): Change callback prototope to include the
SPECIAL arg.  Adjust all users.  Use ks_status_cb.
(gpg_dirmngr_ks_get): Add arg r_source and use ks_status_cb.
* g10/keyserver.c (search_line_handler): Adjust callback and print
"data source" disgnostic.
(keyserver_get): Print data source diagnostic.
--

It has often been requested that the actually used IP of a keyservers
is shown in with gpg --recv-key and --search-key.  This is helpful if
the keyserver is actually a pool of keyservers.  This patch does this.
2014-03-14 16:12:54 +01:00
Werner Koch 5d321eb00b dirmngr: Default to a user socket name and enable autostart.
* common/homedir.c (dirmngr_socket_name): Rename to
dirmngr_sys_socket_name.
(dirmngr_user_socket_name): New.
* common/asshelp.c (start_new_dirmngr): Handle sys and user dirmngr
socket.
* dirmngr/dirmngr.c (main): Ditto.
* dirmngr/server.c (cmd_getinfo): Ditto.
* sm/server.c (gpgsm_server): Ditto.
* dirmngr/dirmngr-client.c (start_dirmngr): Likewise.
* tools/gpgconf.c (main): Print "dirmngr-sys-socket" with --list-dirs.

* configure.ac (USE_DIRMNGR_AUTO_START): Set by default.
2014-03-14 12:36:36 +01:00
Werner Koch 6dd5d99a61 gpg: Add option --dirmngr-program.
* g10/gpg.c: Add option --dirmngr-program.
* g10/options.h (struct opt): Add field dirmngr_program.
* g10/call-dirmngr.c (create_context): Use new var.

* dirmngr/dirmngr.c: Include gc-opt-flags.h.
(main): Remove GC_OPT_FLAG_*.
* tools/gpgconf-comp.c (GC_OPT_FLAG_NO_CHANGE): Move macro to ...
* common/gc-opt-flags.h: here.
2014-03-12 18:35:36 +01:00
Werner Koch fb56a273b1 dirmngr: Detect dead keyservers and try another one.
* dirmngr/ks-action.c (ks_action_resolve): Rename var for clarity.
(ks_action_search, ks_action_put): Ditto.
(ks_action_get): Consult only the first server which retruned some
data.

* dirmngr/ks-engine-hkp.c (SEND_REQUEST_RETRIES): New.
(map_host): Add arg CTRL and call dirmngr_tick.
(make_host_part): Add arg CTRL.
(mark_host_dead): Allow the use of an URL.
(handle_send_request_error): New.
(ks_hkp_search, ks_hkp_get, ks_hkp_put): Mark host dead and retry on
error.
2014-03-12 14:33:51 +01:00
Werner Koch 99135b89ce Comment typo fixes
--
2014-03-12 14:33:51 +01:00
Werner Koch 3d9e0eb02c http: Add a flag to the URL parser indicating a literal v6 address.
* common/http.h (struct parsed_uri_t): Add field v6lit.
* common/http.c (do_parse_uri): Set v6lit.
2014-03-12 14:33:51 +01:00
NIIBE Yutaka 781b941743 scd: writekey support of ECC.
* scd/app-openpgp.c (CURVE_SEC_P256K1, get_algo_byte): New.
(store_fpr): Support ECC keys with varargs.
(get_ecc_key_parameters, get_curve_name): Support secp256k1.
(parse_ecc_curve): Likewise.
(build_ecdsa_privkey_template, rsa_writekey, ecdsa_writekey): New.
(ecdh_writekey): New.  Not implemented yet.
(do_writekey): Call rsa_writekey, ecdsa_writekey, or ecdh_writekey.
(do_genkey): Follow the change of store_fpr.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2014-03-12 17:25:33 +09:00
Werner Koch 0b2cca807d dirmngr: Put brackets around IP addresses in the hosttable.
* dirmngr/ks-engine-hkp.c (EAI_OVERFLOW): Provide a substitute.
(my_getnameinfo): New.
(map_host): Use it.
2014-03-11 18:02:29 +01:00
Werner Koch a3dee28891 dirmngr: Add command option to mark hosts as dead or alive.
* dirmngr/server.c (cmd_killdirmngr): Factor some code out to ...
(check_owner_permission): here.
(cmd_keyserver): Add options --dead and --alive.
* dirmngr/ks-engine-hkp.c (host_in_pool_p): New.
(ks_hkp_mark_host): New.
--

Also removed the warning that the widnows part has not yet been done.
AFAICS, the current mingw supports the all used socket functions.
2014-03-11 16:30:36 +01:00
Werner Koch 71b55c9455 dirmngr: Make Assuan output of keyblocks easier readable
* dirmngr/server.c (data_line_cookie_write): Print shorter data lines
in verbose mode.
2014-03-11 16:30:36 +01:00
Werner Koch 3c35b46a32 dirmngr: Fix HKP host selection code.
* dirmngr/server.c (cmd_keyserver): Add option --resolve and change
--print-hosttable to --hosttable.
* dirmngr/ks-action.c (ks_printf_help): New.
(ks_action_resolve): New.
* dirmngr/ks-engine-hkp.c (select_random_host): Fix selection.
(ks_hkp_print_hosttable): Print to assuan stream.
(map_host): Remove debug code.  Add arg FORCE_SELECT.  Return numeric
IP addr if it can't be resolved.
(make_host_part): Add arg FORCE_SELECT; change callers to pass false.
(ks_hkp_resolve): New.
--

The new options for the keyserver command are useful for debugging.
For example:

  $ tools/gpg-connect-agent -S /usr/local/var/run/gnupg/S.dirmngr \
          'keyserver hkp://keys.gnupg.net' \
          'keyserver http://http-keys.gnupg.net' \
          'keyserver --resolve --hosttable' /bye

yields:

  OK
  OK
  S # http://astrath.net:80
  S # http://2001:41d0:1:e673::1:11371
  S # hosttable (idx, ipv4, ipv6, dead, name):
  S #   0       http-keys.gnupg.net
  S #   .   --> 10 11 12 1 5 8 7 4* 2 9 6 3
  S #   1 4     37.250.168.245.bredband.tre.se
  S #   2 4 6   keys.exosphere.de
  S #   3 4 6   poseidon.muc.drweb-av.de
  S #   4 4     astrath.net
  S #   5 4     79.143.214.216
  S #   6 4     openpgp.andrew.kvalhe.im
  S #   7 4     app.aaiedu.hr
  S #   8 4 6   alita.karotte.org
  S #   9 4 6   keyserver.bau5net.com
  S #  10 4     194.94.127.122
  S #  11   6   2001:4d88:1ffc:477::7
  S #  12   6   2a00:1280:8000:2:1:8:0:1
  S #  13       keys.gnupg.net
  S #   .   --> 23 28* 30 17 22 8 7 27 25 14 21 20 19 29 [...]
  S #  14 4     hufu.ki.iif.hu
  S #  15 4     pks.ms.mff.cuni.cz
  S #  16 4     pgpkeys.co.uk
  S #  17 4     80-239-156-219.customer.teliacarrier.com
  S #  18 4     srv01.secure-u.de
  S #  19 4     mallos.xs4all.nl
  S #  20 4     kronecker.scientia.net
  S #  21 4     keyserver.ut.mephi.ru
  S #  22 4     89-68-150-88.dynamic.chello.pl
  S #  23   6   2001:1608:21:6:84:200:66:125
  S #  24   6   sks.es.net
  S #  25   6   gstueve-1-pt.tunnel.tserv13.ash1.ipv6.he.net
  S #  26   6   sks.mrball.net
  S #  27   6   gozer.rediris.es
  S #  28   6   2001:41d0:1:e673::1
  S #  29   6   oteiza.siccegge.de
  S #  30   6   2403:4200:401:10::13
  S #  31   6   statler.serviz.fr
  OK
2014-03-11 16:30:36 +01:00
Werner Koch f30d8b0188 List readline support in configure summary
* m4/readline.m4: Set gnupg_cv_have_readline.
* configure.ac: Add readline support to summary output.
--

Readline is an optional feature which is build if the readline
development files are available on the build systems.  Too often they
are missing on a (new) build machine which at least makes debugging
inconvenient.
Backport useful code from fixes for bug 1447.

* configure.ac: Cehck for inet_ntop.
* m4/libcurl.m4: Provide a #define for the version of the curl
library.
--

We do not have keyserver helpers anymore but this fixes may come handy
eventually.
2014-03-11 16:30:36 +01:00
NIIBE Yutaka ac5a1a3ccb agent: API change of agent_key_from_file.
* agent/findkey.c (agent_key_from_file): Always return S-expression.
* agent/command.c (cmd_passwd): Distinguish by SHADOW_INFO.
(cmd_export_key): Likewise.  Free SHADOW_INFO.
(cmd_keytocard): Likewise.  Release S_SKEY.
* agent/pkdecrypt.c (agent_pkdecrypt): Likewise.
* agent/pksign.c (agent_pksign_do): Likewise.  Use the S-expression to
know the key type.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2014-03-11 16:03:01 +09:00
Werner Koch 57d26f39af Backport useful code from fixes for bug 1447.
* configure.ac: Cehck for inet_ntop.
* m4/libcurl.m4: Provide a #define for the version of the curl
library.
--

We do not have keyserver helpers anymore but this fixes may come handy
eventually.
2014-03-10 16:07:51 +01:00