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Commit Graph

622 Commits

Author SHA1 Message Date
Werner Koch
502d43ac30
dirmngr: Support ECDSA for CRLs
* dirmngr/crlcache.c (finish_sig_check): Support ECDSA.
* dirmngr/validate.c (check_cert_sig): Ditto.  Remove the never
used support for DSA.

(cherry picked from commit de87c8e1ea)
2022-11-15 10:47:31 +01:00
NIIBE Yutaka
a5c3821664
dirmngr: Fix build with no LDAP support.
* dirmngr/server.c [USE_LDAP] (start_command_handler): Conditionalize.

--

Cherry-pick master commit of:
	7011286ce6

GnuPG-bug-id: 6239
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-10-18 10:16:11 +09:00
Werner Koch
a70a3204c2
dirmngr: Support paged LDAP mode for KS_GET
* dirmngr/ks-engine-ldap.c (PAGE_SIZE): New.
(struct ks_engine_ldap_local_s): Add several new fields.
(ks_ldap_clear_state): Release them.
(search_and_parse): Factored out from ks_ldap_get and extended to
support the paged mode.
(ks_ldap_get):  Implement the pages mode for --first and --next.
* dirmngr/server.c (cmd_ks_get): Provide a dummy passphrase in --first
mode.
* dirmngr/Makefile.am (dirmngr_LDADD): Add LBER_LIBS.
--

The paged mode allows to retrieve more items than the servers usually
limit (e.g. 1000 for an LDS).  This patch also allows to use --first
without a patter to retrieve all keyblocks (except for disabled and
revoked keys).

GnuPG-bug-id: 6224
Backported-from-master: 7a01e806ea
2022-10-07 13:54:34 +02:00
Werner Koch
20cb9319d9
dirmngr: New options --first and --next for KS_GET.
* dirmngr/server.c (cmd_ks_get): Add option --first and --next.
(start_command_handler): Free that new ldap state.
* dirmngr/ks-engine-ldap.c (struct ks_engine_ldap_local_s): New.
(ks_ldap_new_state, ks_ldap_clear_state): New.
(ks_ldap_free_state): New.
(return_one_keyblock): New.  Mostly factored out from ....
(ks_ldap_get): here.  Implement --first/--next feature.

* dirmngr/ks-action.c (ks_action_get): Rename arg ldap_only to
ks_get_flags.
* dirmngr/ks-engine.h (KS_GET_FLAG_ONLY_LDAP): New.
(KS_GET_FLAG_FIRST): New.
(KS_GET_FLAG_NEXT): New.

* dirmngr/dirmngr.h (struct server_control_s): Add member
ks_get_state.
(struct ks_engine_ldap_local_s): New forward reference.
--

This feature allows to fetch keyblock by keyblock from an LDAP server.
This way tools can process and maybe filter each keyblock in a more
flexible way.  Here is an example where two keyblocks for one mail
address are returned:

  $ gpg-connect-agent --dirmngr
  > ks_get --ldap --first  <foo@example.org>
  [... First keyblock is returned ]
  OK
  > ks_get --next
  [ ... Next keyblock is returned ]
  OK
  > ks_get --next
  ERR 167772218 No data <Dirmngr>

GnuPG_bug_id: 6224
Backported-from-master: 4de98d4468
2022-10-07 13:49:55 +02:00
Werner Koch
4cf8dc2d96
dirmngr: Minor fix for baseDN fallback.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Avoid passing data
behind the EOS.
(interrogate_ldap_dn): Stylistic change.
--

This also updates the my_ldap_connect description.

GnuPG-bug-id: 6047
(cherry picked from commit 11aa5a93a7)
2022-10-07 13:35:21 +02:00
NIIBE Yutaka
73cc5e073c
dirnmgr: Fix the function prototype.
* dirmngr/ldap-wrapper.c (ldap_wrapper_wait_connections): It's with
no arguments.

--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
(cherry picked from commit 530d709607)
2022-10-07 13:22:03 +02:00
NIIBE Yutaka
98fbac6141
dirmngr: Change interrogate_ldap_dn for better memory semantics.
* dirmngr/ks-engine-ldap.c (interrogate_ldap_dn): Return BASEDN found,
memory allocated.
(my_ldap_connect): Follow the change, removing needless allocation.

--

GnuPG-bug-id: 6047
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
(cherry picked from commit 4b2066afb4)
2022-10-07 13:21:37 +02:00
Joey Berkovitz
5516f92224
dirmngr: Interrogate LDAP server when base DN specified.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): interrogate LDAP
server when basedn specified.

--

GnuPG-bug-id: 6047
Signed-off-by: Joey Berkovitz <joeyberkovitz@gmail.com>
(cherry picked from commit 3257385378)
2022-10-07 13:21:20 +02:00
Werner Koch
615c9717c1
dirmngr: Support gpgMailbox for mode MAILSUB and MAILEND.
* dirmngr/ks-engine-ldap.c (keyspec_to_ldap_filter): Use gpgMailbox if
server supports this.
2022-10-07 13:19:10 +02:00
Werner Koch
44960e702e
dirmngr: Factor out interrogate_ldap_dn function.
* dirmngr/ks-engine-ldap.c (interrogate_ldap_dn): New.
--

GnuPG-bug-id: 6047
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
Backported-from-master: 993820c315
2022-10-07 13:16:57 +02:00
Werner Koch
d7a0df4478
doc: Typo fix in a comment.
--
2022-09-28 15:41:16 +02:00
Werner Koch
32ce7ac0c6
dirmngr: Fix lost flags during LDAP upload
* dirmngr/ldapserver.c (ldapserver_parse_one): Turn LINE into a const.
Use strtokenize instead of strtok style parsing.
--

This fixes a problem with resulted in a General Error for the second
key to be uploaded in the same session.  But only if the colon format
to specify a keyserver with flags was used.
2022-09-28 15:40:22 +02:00
Werner Koch
6300035ba1
dirmngr: New server flag "areconly" (A-record-only)
* dirmngr/dirmngr.h (struct ldap_server_s): Add field areconly.
* dirmngr/ldapserver.c (ldapserver_parse_one): Parse "areconly"
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Implement this flag.
* dirmngr/dirmngr_ldap.c: Add option --areconly
(connect_ldap): Implement option.
* dirmngr/ldap.c (run_ldap_wrapper): Add and pass that option.
--

This flag is used to pass the Windows specific option
LDAP_OPT_AREC_EXCLUSIVE.  It is ignored on other systems.

Signed-off-by: Werner Koch <wk@gnupg.org>
2022-09-28 09:43:25 +02:00
Werner Koch
289fbc550d
dirmngr: Fix CRL DP error fallback to other schemes.
* dirmngr/crlcache.c (crl_cache_reload_crl): Rework the double loop.
Remove the unused issuername_uri stuff.
--

It is quite common that LDAP servers are blocked and thuis the HTTP
access point should be used instead.  This worked well for
certificates where the DP are given in this form:

        crlDP: ldap://x500.bund.de/[...]
               http://x500.bund.de/[...]
               issuer: none

but it failed for this form

        crlDP: ldap://x500.bund.de/[...]
               issuer: none
        crlDP: http://x500.bund.de/[...]
               issuer: none

because the LAST_ERR thing terminated the outer loop.  This pacth
fixes this and also cleans up the code to be more robust.

Note that the common workaround of using --ignore-ldap-dp will now
only be needed if the firewall uses packet dropping instead of proper
ICMP rejects.
2022-09-16 16:54:39 +02:00
Werner Koch
ea34325c54
dirmngr: New option --debug-cache-expired-certs.
* dirmngr/dirmngr.h (opt): Add debug_cache_expired_certs:
* dirmngr/dirmngr.c (oDebugCacheExpiredCerts): New.
(opts): Add option.
(parse_rereadable_options): Set option.
* dirmngr/certcache.c (put_cert): Handle the option.
2022-08-31 18:13:25 +02:00
NIIBE Yutaka
14ccabe7f8
dirmngr: Reject certificate which is not valid into cache.
* dirmngr/certcache.c (put_cert): When PERMANENT, reject the
certificate which is obviously invalid.

--

With this change, invalid certificates from system won't be registered
into cache.  Then, an intermediate certificate which is issued by an
entity certified by such an invalid certificate will be also rejected
with GPG_ERR_INV_CERT_OBJ.  With less invalid certificates in cache,
it helps the validate_cert_chain function work better.

GnuPG-bug-id: 6142
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2022-08-31 13:47:51 +02:00
Werner Koch
94908857e1
dirmngr: Fix failed malloc error message.
* dirmngr/ocsp.c (check_signature): Fix error printing of xtrymalloc.
2022-08-03 11:12:13 +02:00
Ingo Klöcker
22e8dc7927
dirmngr: Ask keyservers to provide the key fingerprints
* dirmngr/ks-engine-hkp.c (ks_hkp_search): Add "fingerprint=on" to
request URL.
--

Some keyservers, e.g. keyserver.ubuntu.com (Hockeypuck), do not
provide the key fingerprints by default. Therefore, we ask for the
fingerprints explicitly.

GnuPG-bug-id: 5741
(cherry picked from commit c7fa4c7f8b)
2022-07-26 09:46:15 +02:00
Werner Koch
cc1d475f98
dirmngr,w32: Silence compiler warnings for the LDAP API.
--
2022-06-03 15:36:58 +02:00
Werner Koch
3b251c8366
dirmngr: Escape more characters in WKD requests.
* dirmngr/server.c (proc_wkd_get): Also escape '#' and '+'
--
GnuPG-bug-id: 5902
2022-03-28 16:13:52 +02:00
Werner Koch
6d30fb6940
dirmngr: Make WKD_GET work even for servers not handling SRV RRs.
* dirmngr/server.c (proc_wkd_get): Take care of DNS server failures
--

Unfortunately there are resolver setups which don't handle SRV records
but return a server error.  We let a not found error pass, because
that merely means the domain does not exists.

GnuPG-bug-id: 4729
2022-03-21 22:41:09 +01:00
Werner Koch
3c79ff34c4
dirmngr: Changes to the linking order.
* dirmngr/Makefile.am: Tweak library order.
2022-02-07 20:24:22 +01:00
Werner Koch
137590fd86
dirmngr: Allow building with non-standard ntbtls location.
* dirmngr/Makefile.am: Add missing -L and -I
--
2022-02-03 21:54:09 +01:00
Werner Koch
0b76ef48e1
dirmngr: Simplify --gpgconf-list output
* dirmngr/dirmngr.c (main): Keep only values with the default flag.
--

This is not anymore required abnd brings us in sync with 2.3.
2022-02-03 18:28:25 +01:00
Werner Koch
dde88897e2
dirmngr: Avoid initial delay on the first keyserver access.
* dirmngr/dirmngr.c (dirmngr_never_use_tor_p): New.
* dirmngr/server.c (ensure_keyserver): Don't even test for the Tor
proxy in never-use-tor Mode.

* tools/gpgtar-create.c: Include unistd.h to avoid a warning on
Windows.
--

This delay of 2 or 3 seconds is in particular annoying on Windows.
This is now suppressed, as it should be, if --no-use-tor is used.

The second patch is unrelated
2022-02-01 16:02:20 +01:00
Werner Koch
bf284fdf22
dirmngr: Re-group the options in the --help output.
--

This looks better and is also required for further simplifications of
gpgconf.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 4c43fabbb0)
2021-12-30 09:23:45 +01:00
Werner Koch
5f890f417f
gpgconf: Support reading global options (part 2).
* tools/gpgconf-comp.c: Remove all regular option descriptions.  They
are now read in from the component.  Also remove a few meanwhile
obsolete options.
* agent/gpg-agent.c: Add option description which were only set in
gpgconf-comp.c.
* dirmngr/dirmngr.c: Ditto.
* scd/scdaemon.c: Ditto.
* sm/gpgsm.c: Ditto.
* g10/gpg.c: Ditto.
--

This second part removes all regular option descriptions because they
can be read from the components.  A few were missing in the components
and thus moved to there.

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

This is a backport from master (2.3).
2021-12-29 09:42:45 +01:00
Ingo Klöcker
027e34235b
build: Fix several "include file not found" problems
* dirmngr/Makefile.am (t_ldap_parse_uri_CFLAGS): Add KSBA_CFLAGS.
* kbx/Makefile.am (libkeybox_a_CFLAGS, libkeybox509_a_CFLAGS): Add
NPTH_CFLAGS.
* tools/Makefile.am (gpgtar_CFLAGS, gpg_wks_server_CFLAGS,
gpg_wks_client_CFLAGS, gpg_pair_tool_CFLAGS): Add LIBGCRYPT_CFLAGS.
--

The tools include gcrypt.h via common/util.h.

GnuPG-bug-id: 5592
2021-11-14 18:18:41 +01:00
Werner Koch
6507c6ab10
agent,dirmngr: New option --steal-socket
* agent/gpg-agent.c (oStealSocket): New.
(opts): Add option.
(steal_socket): New file global var.
(main): Set option.
(create_server_socket): Implement option.

* dirmngr/dirmngr.c (oStealSocket): New.
(opts): Add option.
(steal_socket): New file global var.
(main): Set option.  Add comment to eventually implement it.
--

Note that --steal-socket has currently no effect on dirmngr because
dirmngr does this anway.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-11-13 15:07:35 +01:00
NIIBE Yutaka
152f028155
dns: Make reading resolv.conf more robust.
* dirmngr/dns.c (dns_resconf_loadfile): Skip "search" which
begins with '.'.

--

GnuPG-bug-id: 5657
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2021-11-02 20:49:51 +01:00
Werner Koch
323a20399d
dirmngr: New option --ignore-cert
* dirmngr/dirmngr.h (struct fingerprint_list_s): Add field binlen.
(opt): Add field ignored_certs.
* dirmngr/dirmngr.c: Add option --ignore-cert
(parse_rereadable_options): Handle that option.
(parse_ocsp_signer): Rename to ...
(parse_fingerprint_item): this and add two args.
* dirmngr/certcache.c (put_cert): Ignore all to be igored certs.
Change callers to handle the new error return.
--

This option is useful as a workaround in case we ill run into other
chain validation errors like what we fixed in
GnuPG-bug-id: 5639
Backported-from-master: 4b3e9a44b5
2021-10-06 11:06:01 +02:00
Werner Koch
341ab0123a
dirmngr: Fix Let's Encrypt certificate chain validation.
* dirmngr/certcache.c (find_cert_bysubject): Return the first trusted
certififcate if any.
--

This is basically the same as using OpenSSL with ist
X509_V_FLAG_TRUSTED_FIRST flag. See
https://www.openssl.org/blog/blog/2021/09/13/LetsEncryptRootCertExpire/

GnuPG-bug-id: 5639
2021-10-06 10:56:43 +02:00
Werner Koch
47c4e3e00a
dirmngr: Change the default keyserver.
* configure.ac (DIRMNGR_DEFAULT_KEYSERVER): Change to
keyserver.ubuntu.com.

* dirmngr/certcache.c (cert_cache_init): Disable default pool cert.
* dirmngr/http-ntbtls.c (gnupg_http_tls_verify_cb): Ditto.
* dirmngr/http.c (http_session_new): Ditto.

* dirmngr/server.c (make_keyserver_item): Use a different mapping for
the gnupg.net names.
--

Due to the unfortunate shutdown of the keyserver pool, the long term
defaults won't work anymore.  Thus it is better to change them.

For https access keyserver.ubuntu.com is now used because it can be
expected that this server can stand the load from newer gnupg LTS
versions.

For http based access the Dutch Surfnet keyserver is used.  However
due to a non-standard TLS certificate this server can not easily be
made the default for https.

Note: that the default server will be changed again as soon as a new
connected keyserver infrastructure has been established.
2021-06-25 19:15:24 +02:00
Werner Koch
adf7bfba5d
dirmngr: Fix regression in KS_GET for mail address pattern.
* dirmngr/ks-engine-hkp.c (ks_hkp_search): Munge mail address pattern.
(ks_hkp_get): Allow for mail addresses.
-

Before the keyserver changes in 2.2.28 gpg passed dirmngr a pail
address as an exact pattern (e.g. "=foo@example.org").  Since 2.2.28
the mail address is detected gpg gpg and we see for example
"<foo@example.org>".  This patch fixes this to turn a mail address
into an exact match again.

GnuPG-bug-id: 5497
Signed-off-by: Werner Koch <wk@gnupg.org>
2021-06-21 09:22:17 +02:00
NIIBE Yutaka
c8b2162c0e dirmngir: Fix build with --disable-ldap.
* dirmngr/dirmngr.c (parse_rereadable_options) [USE_LDAP]:
Conditionalize.

--

Reported-by: Phil Pennock
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2021-06-11 10:30:02 +09:00
NIIBE Yutaka
8ee4c8d1e0 dirmngr: Remove use of USE_LDAPWRAPPER.
* configure.ac (USE_LDAPWRAPPER): Remove.
* dirmngr/Makefile.am: Use USE_LDAP instead of USE_LDAPWRAPPER.
* dirmngr/ldap-wrapper-ce.c: Remove.
* dirmngr/ldap-wrapper.h, dirmngr/ldap-wrapper.c: Remove
USE_LDAPWRAPPER things.

--

Backported-from-master: 4c295646ba
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
2021-06-11 10:06:24 +09:00
Werner Koch
f6e45671aa
dirmngr: Allow to pass no filter args to dirmngr_ldap.
* dirmngr/dirmngr_ldap.c (main): Handle no args case.
--

This is required for example for CRLs.  The old code did not require
this because the hos was taken from the URL given has arg.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-06-09 10:23:55 +02:00
Werner Koch
39815c023f
dirmngr: Rewrite the LDAP wrapper tool
* dirmngr/ldap-misc.c: New.
* dirmngr/ldap-misc.h: New.
* dirmngr/ks-engine-ldap.c: Include ldap-misc.h.
(ldap_err_to_gpg_err, ldap_to_gpg_err): Move to ldap-misc.c.
* dirmngr/ldap-wrapper.c (ldap_wrapper): Print list of args in debug
mode.
* dirmngr/server.c (lookup_cert_by_pattern): Handle GPG_ERR_NOT_FOUND
the saqme as GPG_ERR_NO_DATA.
* dirmngr/ldap.c (run_ldap_wrapper): Add args tls_mode and ntds.
Remove arg url.  Adjust for changes in dirmngr_ldap.
(url_fetch_ldap): Remove args host and port.  Parse the URL and use
these values to call run_ldap_wrapper.
(attr_fetch_ldap): Pass tls flags to run_ldap_wrapper.
(rfc2254_need_escape, rfc2254_escape): New.
(extfilt_need_escape, extfilt_escape): New.
(parse_one_pattern): Rename to ...
(make_one_filter): this.  Change for new dirmngr_ldap calling
convention.  Make issuer DN searching partly work.
(escape4url, make_url): Remove.
(start_cert_fetch_ldap): Change for new dirmngr_ldap calling
convention.
* dirmngr/dirmngr_ldap.c: Major rewrite.

* dirmngr/t-ldap-misc.c: New.
* dirmngr/t-support.h (DIM, DIMof): New.
* dirmngr/Makefile.am (dirmngr_ldap_SOURCES): Add ldap-misc.c
(module_tests) [USE_LDAP]: Add t-ldap-misc.
(t_ldap_parse_uri_SOURCES): Ditto.
(t_ldap_misc_SOURCES): New.
--

This rewrite allows to properly handle TLS and avoids some code
duplication.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-06-08 08:51:11 +02:00
Werner Koch
8bd5172539
dirmngr: Remove useless code.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Remove the
password_param thing because we set the password directly without an
intermediate var.
--

Reported-by: Ingo Kloecker
2021-06-04 07:49:00 +02:00
Werner Koch
8de9d54ac8
dirmngr: Fix default port for our redefinition of ldaps.
* dirmngr/server.c (make_keyserver_item): Fix default port for ldaps.
Move a tmpstr out of the blocks.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Improve diagnostics.
--

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-28 15:22:51 +02:00
Werner Koch
317d5947b8
dirmngr: Use --ldaptimeout for OpenPGP LDAP keyservers.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Use LDAP_OPT_TIMEOUT.

* dirmngr/dirmngr.c (main): Move --ldaptimeout setting to ...
(parse_rereadable_options): here.
--

Note that this has not yet been tested.  In fact a test with OpenLDAP
using a modified route got stuck in the connection attempt.  Maybe it
works on Windows - will be tested later.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-26 19:06:36 +02:00
Werner Koch
ff17aee5d1
dirmngr: New option --ldapserver
* dirmngr/dirmngr.c (opts): Add option --ldapserver.
(ldapserver_list_needs_reset): New var.
(parse_rereadable_options): Implement option.
(main): Ignore dirmngr_ldapservers.conf if no --ldapserver is used.

* dirmngr/server.c (cmd_ldapserver): Add option --clear and list
configured servers if none are given.
--

This option allows to specify LDAP keyserver in dirmngr instead of
using gpgsm.conf.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-26 16:21:50 +02:00
Werner Koch
2b4cddf908
dirmngr: Allow for non-URL specified ldap keyservers.
* dirmngr/server.c (cmd_ldapserver): Strip an optional prefix.
(make_keyserver_item): Handle non-URL ldap specs.
* dirmngr/dirmngr.h (struct ldap_server_s): Add fields starttls,
ldap_over_tls, and ntds.

* dirmngr/ldapserver.c (ldapserver_parse_one): Add for an empty host
string.  Improve error messages for the non-file case.  Support flags.
* dirmngr/ks-action.c (ks_action_help): Handle non-URL ldap specs.
(ks_action_search, ks_action_get, ks_action_put): Ditto.
* dirmngr/ks-engine-ldap.c: Include ldapserver.h.
(ks_ldap_help): Handle non-URL ldap specs.
(my_ldap_connect): Add args r_host and r_use_tls.  Rewrite to support
URLs and non-URL specified keyservers.
(ks_ldap_get): Adjust for changes in my_ldap_connect.
(ks_ldap_search): Ditto.
(ks_ldap_put): Ditto.
--

The idea here is to unify our use of URLS or colon delimited ldap
keyserver specification.  The requirement for percent escaping, for
example the bindname in an URLs, is cumbersome and prone to errors.
This we allow our classic colon delimited format as an alternative.
That format makes it also easy to specify flags to tell dirmngr
whether to use starttls or ldap-over-tls.  The code is nearly 100%
compatible to existing specification.  There is one ambiguity if the
hostname for CRL/X509 searches is just "ldap"; this can be solved by
prefixing it with "ldap:" (already implemented in gpgsm).

GnuPG-bug-id: 5405, 5452
2021-05-26 14:48:27 +02:00
Werner Koch
72124fadaf
dirmngr: Support pseudo URI scheme "opaque".
* dirmngr/http.h (HTTP_PARSE_NO_SCHEME_CHECK): New.
* dirmngr/http.c (http_parse_uri): Use this flag.  Change all callers
to use the new macro for better readability.
(do_parse_uri): Add pseudo scheme "opaque".
(uri_query_value): New.
--

This scheme can be used to convey arbitrary strings in a parsed_uri_t
object.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-26 10:02:49 +02:00
Werner Koch
f0e538619d
dirmngr: For KS_SEARCH return the fingerprint also with LDAP.
* dirmngr/ks-engine-ldap.c (extract_keys): Return the fingerprint if
available.
(ks_ldap_search): Ditto.
(extract_keys): Make sure to free the ldap values also in corner
cases.
(my_ldap_value_free): New.
(ks_ldap_get): Ditto.
(ks_ldap_search): Ditto.
(my_ldap_connect): Ditto.
--

For background see these comments from gpgme:

/* The output for external keylistings in GnuPG is different from all
   the other key listings.  We catch this here with a special
   preprocessor that reformats the colon handler lines.  */
/* The format is:

   pub:<keyid>:<algo>:<keylen>:<creationdate>:<expirationdate>:<flags>

   as defined in 5.2. Machine Readable Indexes of the OpenPGP
   HTTP Keyserver Protocol (draft).  Modern versions of the SKS
   keyserver return the fingerprint instead of the keyid.  We
   detect this here and use the v4 fingerprint format to convert
   it to a key id.

   We want:
   pub:o<flags>:<keylen>:<algo>:<keyid>:<creatdate>:<expdate>::::::::
*/

Regarding the freeing of values: I was not able to find a
specification stating it is okay to pass NULL to ldap_value_free, thus
the new wrapper.  Also add robustness measures in case ldap_get_value
returns an empty array.

GnuPG-bug-id: 5441
Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-19 18:18:35 +02:00
Werner Koch
b6f8cd7eef
dirmngr: LDAP search by a mailbox now ignores revoked keys.
* dirmngr/ks-engine-ldap.c (keyspec_to_ldap_filter): Ignore revoked
and disable keys in mail mode.
--

The LDAP schema has a revoked and a disabled flag.  The former will be
set if a revoked key is uploaded; the latter can be set by other
means.   With this change a search by mailbox does not anymore return
keys with these LDAP attributes set.  This allows to better maintain a
directory with multiple keys per mailbox.

Doing the same for expired keys could also be done but requires more
effort.

Signed-off-by: Werner Koch <wk@gnupg.org>
2021-05-17 15:35:27 +02:00
Werner Koch
b59af0e2a0
gpg: Lookup a missing public key of the current card via LDAP.
* g10/getkey.c (get_seckey_default_or_card): Lookup a missing public
key from the current card via LDAP.
* g10/call-dirmngr.c: Include keyserver-intetnal.h.
(gpg_dirmngr_ks_get): Rename arg quick into flags.  Take care of the
new LDAP flag.
* g10/keyserver-internal.h (KEYSERVER_IMPORT_FLAG_QUICK): New.
Replace the use of the value 1 for the former quick arg.
(KEYSERVER_IMPORT_FLAG_LDAP): New.
* g10/keyserver.c (keyserver_get_chunk): Increase the reserved line
length.
* dirmngr/ks-action.c (ks_action_get): Add arg ldap_only.
* dirmngr/server.c (cmd_ks_get): Add option --ldap.
--

This change makes it easy to start working with gnupg: Just insert the
smartcard or token provided to you and the first time you sign a
message the public key associated with the current card will be
imported and everything is set without any configuration.

This works only with an LDAP directory because it can be expected that
the public key has been put into the LDAP during card personalization.
Of course an LDAP server needs to be configured; in a Windows AD
domain this can be a mere "keyserver ldap:///" in dirmngr.conf.  Other
configured keyservers are ignored.

Requirements for the card driver: The $SIGNKEYID attribute must exists
and a query for the KEY-FPR attribute needs to return the OpenPGP
fingerprint for that key.  This is currently supported for OpenPGP
cards and certain PKCS#15 cards.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit d7e707170f)
2021-05-03 20:28:33 +02:00
Werner Koch
8bc808a98f
w32: Silence a compiler warning in dirmngr.c
--

(cherry picked from commit 683ff00bb1)
2021-04-29 19:45:00 +02:00
Werner Koch
1303b0ed84
gpg: Do not use self-sigs-only for LDAP keyserver imports.
* dirmngr/ks-engine-ldap.c (ks_ldap_get): Print a SOURCE status.
* g10/options.h (opts): New field expl_import_self_sigs_only.
* g10/import.c (parse_import_options): Set it.
* g10/keyserver.c (keyserver_get_chunk): Add special options for LDAP.
--

I can be assumed that configured LDAP servers are somehow curated and
not affected by rogue key signatures as the HKP servers are.  Thus we
can allow the import of key signature from LDAP keyservers by default.

GnuPG-bug-id: 5387
2021-04-13 14:50:05 +02:00
Werner Koch
55f46b33df
dirmngr: Support new gpgNtds parameter in LDAP keyserver URLs.
* dirmngr/ldap-parse-uri.c (ldap_parse_uri): Support a new gpgNtds
extension.
* dirmngr/ks-engine-ldap.c (my_ldap_connect): Do ldap_init always with
hostname - which is NULL and thus the same if not given.  Fix minor
error in error code handling.
--

Note that "gpgNtds" is per RFC-4512 case insensitive and has not yet
been officially regisetered.  Thus for correctness the OID can be
used:

  1.3.6.1.4.1.11591.2.5          LDAP URL extensions
  1.3.6.1.4.1.11591.2.5.1          gpgNtds=1 (auth. with current user)

Note that the value must be 1; all other values won't enable AD
authentication and are resevered for future use.
2021-02-17 17:31:36 +01:00