* dirmngr/http.c (send_request): Print the used TLS library in debug
mode.
--
We allow two different TLS libararies and thus it is useful to see
that in the debug output of bug reports.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.h (HTTP_FLAG_TRUST_CFG): New flag.
* dirmngr/http.c (http_register_cfg_ca): New.
(http_session_new) [HTTP_USE_GNUTLS]: Implement new trust flag.
* dirmngr/certcache.c (load_certs_from_dir): Call new function.
(cert_cache_deinit): Ditto.
* dirmngr/http-ntbtls.c (gnupg_http_tls_verify_cb): Ditto.
* dirmngr/ks-engine-http.c (ks_http_fetch): Add new args
'send_no_cache' and 'extra_http_trust_flags'. Change all callers to
provide the default value.
* dirmngr/crlfetch.c (crl_fetch): Rewrite to make use of
ks_http_fetch.
--
The old code simply did not use https for downloading of CRLS.
Instead it rewrote https to http under the assumption that the CRL
service was also available without encryption. Note that a CRL is
self-standing and thus it does not need to have extra authenticity as
provided by TLS. These days we should not use any unencrypted content
and thus this patch.
Be aware that cacert.org give a https CRL DP but that currently
redirects to to http! This is a downgrade attack which we detect and
don't allow. The outcome is that it is right now not possible to use
CAcert certificates.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/logging.c: Do not build any code if we can use the gpgrt_log
functions.
(log_logv_with_prefix): Rename to log_logv_prefix and change order of
args so that this function matches its printf like counterpart
gpgrt_logv_prefix. Change all callers.
(log_debug_with_string): Rename to log_debug_string. Change all
callers.
(log_printhex): Move first arg to end so that this function matches
its printf like counterpart gpgrt_log_printhex. Change all callers.
* common/logging.h: Divert to gpgrt/libgpg-error if we can use the
gpgrt_log functions.
(bug_at): Add inline versions if we can use the gpgrt_log functions.
* configure.ac (GPGRT_ENABLE_LOG_MACROS): Add to AH_BOTTOM.
(mycflags): Add -Wno-format-zero-length.
--
This patch enables the use of the log function from libgpgrt (aka
libgpg-error). Instead of checking a version number, we enable them
depending on macros set by recent gpg-error versions. Eventually the
whole divert stuff can be removed.
The -Wno-format-zero-length is required because log_printhex can be
called with an empty format string. Note that this is fully specified
standard C behaviour.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (send_request): If a http proxy is to be used, and we
want to use TLS, try to use the CONNECT method to get a connection to
the target server.
GnuPG-bug-id: 2940
Signed-off-by: Justus Winter <justus@g10code.com>
* dirmngr/http.c (http_wait_response): Get the 'use_tls' flag from the
write cookie, not from the URI.
Signed-off-by: Justus Winter <justus@g10code.com>
* dirmngr/http.c (send_request): Do not use the 'srvtag' intended for
the target host to connect to the http proxy.
Signed-off-by: Justus Winter <justus@g10code.com>
* dirmngr/http.c (parse_uri): Keep an unmodified copy of the URI.
* dirmngr/http.h (struct parsed_uri_s): New field 'original'.
* dirmngr/ks-action.c (ks_action_get): Properly handle http and https
URLs.
--
If a key has a http or https URL as preferred keyserver, fetch the key
from there. Previously, dirmngr unconditionally interpreted these
URLs as hkp servers.
GnuPG-bug-id: 2924
Signed-off-by: Justus Winter <justus@g10code.com>
* dirmngr/http.c: Include fcntl.h.
(http_session_s): Add field 'connect_timeout'.
(http_session_new): Clear that.
(http_session_set_timeout): New function.
(my_wsagetlasterror) [W32]: New.
(connect_with_timeout): New function.
(connect_server): Add arg 'timeout' and call connect_with_timeout.
(send_request): Add arg 'timeout' and pass it to connect_server.
(http_raw_connect): Add arg 'timeout'.
(http_open): Pass TIMEOUT from the session to connect_server.
--
Note that the non-blocking connect we implement is traditional a
pretty non-portable thing due to slighly different semantics. The
code uses the strategy W. Richard Stevens suggested in 1998.
Hopefully current OS versions got it all right.
The code has not been tested on Windows.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (read_server, write_server): Use assuan_fd_t.
(http_wait_response): Use FD2INT to get unsigned integer fd.
(read_server, write_server): Likewise.
(simple_cookie_read, simple_cookie_write): Use assuan_fd_t.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* dirmngr/http.c (simple_cookie_read, simple_cookie_write): Only
valid with HTTP_USE_NTBTLS.
(_my_socket_new): Simply cast to int since it's for debug.
(_my_socket_ref, _my_socket_unref): Likewise.
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
* dirmngr/dirmngr.h (DBG_EXTPROG_VALUE, DBG_EXTPROG): New macros.
* dirmngr/dirmngr.c (debug_flags): Add flag "extprog".
(handle_connections): Use a macro instead of -1 for an invalid socket.
* dirmngr/loadswdb.c (verify_status_cb): Debug the gpgv call.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dirmngr.h (server_control_s): New flag 'http_no_crl'.
* dirmngr/dirmngr.c (dirmngr_init_default_ctrl): Set this flag.
* dirmngr/server.c (option_handler): New option "http-crl"
* dirmngr/http.h (HTTP_FLAG_NO_CRL): New flag.
* dirmngr/http-ntbtls.c (gnupg_http_tls_verify_cb): Consult this flag.
* dirmngr/ks-engine-hkp.c (send_request): Set flag depending on CTRL.
* dirmngr/ks-engine-http.c (ks_http_fetch): Ditto.
* dirmngr/t-http.c (main): New option --no-crl.
--
This new option can be used to enable CRL checks on a per session
base. The default is not to use CRLs for https connections.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (HTTP_SESSION_MAGIC): New.
(http_session_s): New field 'magic'.
(HTTP_CONTEXT_MAGIC): New.
(http_context_s): New field 'magic'.
(my_ntbtls_verify_cb): Assert MAGIC.
(fp_onclose_notification): Ditto.
(session_unref): Ditto. Reset MAGIC.
(http_session_new): Set MAGIC.
(http_open): Ditto.
(http_raw_connect): Ditto.
(http_close): Assert MAGIC. Reset MAGIC.
* dirmngr/t-http.c (my_http_tls_verify_cb): MArk HTTP_FLAGS unused.
--
We pass those handles through opaque pointers. The magic numbers will
help to detect wrong use.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http-ntbtls.c: New.
* dirmngr/Makefile.am (dirmngr_SOURCES): Add file.
* dirmngr/dirmngr.h (SERVER_CONTROL_MAGIC): New.
(server_conrol_s): Add field 'magic',
* dirmngr/dirmngr.c (dirmngr_init_default_ctrl): Set MAGIC.
(dirmngr_deinit_default_ctrl): Set MAGIC to deadbeef.
* dirmngr/http.c (my_ntbtls_verify_cb): New.
(http_session_new) [HTTP_USE_NTBTLS]: Remove all CA setting code.
(send_request) [HTTP_USE_NTBTLS]: Set the verify callback. Do not call
the verify callback after the handshake.
* dirmngr/ks-engine-hkp.c (send_request): Pass
gnupg_http_tls_verify_cb to http_session_new.
* dirmngr/ks-engine-http.c (ks_http_fetch): Ditto.
* dirmngr/t-http.c (my_http_tls_verify_cb): New.
(main): Rename option --gnutls-debug to --tls-debug.
(main) [HTTP_USE_NTBTLS]: Create a session.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (connect_server): Change to return an gpg_error_t
and to store socket at the passed address.
(http_raw_connect, send_request): Adjust accordingly.
--
This change removes cruft from the code and allows to return the error
code from the name lookup.
Signed-off-by: Werner Koch <wk@gnupg.org>
* common/logging.c (do_logv): Remove extra parentheses in comparison.
* dirmngr/dns-stuff.c (resolve_addr_libdns): Init RES so that
dns_res_close is given a defined value in the error case.
* dirmngr/http.c (cookie_read, cookie_write) [HTTP_USE_NTBTLS]: Fix
format string char.
* dirmngr/ks-engine-hkp.c (ks_hkp_help): Remove duplicate "const".
* dirmngr/ks-engine-http.c (ks_http_help): Ditto.
* dirmngr/ks-engine-kdns.c (ks_kdns_help): Ditto.
* dirmngr/ks-engine-ldap.c (ks_ldap_help): Ditto.
* scd/app-p15.c (send_keypairinfo, do_getattr): Fix format string
char.
* tools/gpgconf-comp.c (gpg_agent_runtime_change): Init PID for the
error case.
(scdaemon_runtime_change): Ditto.
(dirmngr_runtime_change): Ditto.
* tools/gpgconf.c (query_swdb): Init VALUE_SIZE_UL.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (use_socks): New.
(my_sock_new_for_addr): New.
(connect_server): Replace assuan_sock_new by my_sock_new_for_addr.
--
Libassuan always uses 127.0.0.1 to connect to the local Tor proxy.
https.c used to create a socket for the actual address family and thus
the connect call in Libassuan fails when it tries to connect to a v6
address using a v4 socket.
It would be cleaner to have the my_sock_new_for_addr function as a
public interface in Libassuan; for now we need to duplicate some code.
from Libassuan.
GnuPG-bug-id: 2902
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.c (opt_verbose, opt_debug): New vars.
(http_set_verbose): New function.
(_my_socket_new): Add debug output.
(_my_socket_ref, _my_socket_unref, session_unref): Call log_debug if
OPT_DEBUG has ben set to 2 in a debugger.
(http_session_new, http_session_ref): Ditto.
(send_request, http_start_data): Print debug output for the request.
(parse_response): Change to use log_debug_string for the response.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/http.h (parsed_uri_s): Add field EXPLICIT_PORT.
* dirmngr/http.c (do_parse_uri): That it.
* dirmngr/ks-engine-hkp.c (map_host): Add arg NO_SRV.
(make_host_part): Ditto.
(ks_hkp_resolve): Set NO_SRV from EXPLICIT_PORT.
(ks_hkp_search): Ditto.
(ks_hkp_get): Ditto.
(ks_hkp_put): Ditto.
--
This implements the behaviour of the keyserver helpers from 1.4 and
2.0.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dns-stuff.c (get_dns_srv): Add args SERVICE and PROTO.
* dirmngr/http.c (connect_server): Simplify SRV lookup.
* dirmngr/ks-engine-hkp.c (map_host): Ditto.
* dirmngr/t-dns-stuff.c (main): Adjust for changed get_dns_srv.
--
This new API is more convenient because it includes commonly used
code. Note that right now http.c's SRV record code is not used.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dns-stuff.c (DEFAULT_TIMEOUT): New.
(opt_timeout): New var.
(set_dns_timeout): New.
(libdns_res_open): Set the default timeout.
(libdns_res_wait): Use configurable timeout.
(resolve_name_libdns): Ditto.
* dirmngr/dirmngr.c (oResolverTimeout): New const.
(opts): New option --resolver-timeout.
(parse_rereadable_options): Set that option.
(main) <aGPGConfList>: Add --nameserver and --resolver-timeout.
* tools/gpgconf-comp.c (gc_options_dirmngr): Add --resolver-timeout
and --nameserver.
* dirmngr/http.c (connect_server): Fix yesterday introduced bug in
error diagnostic.
--
This timeout is a pretty crude thing because libdns has a few other
internal timeouts as well.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dns-stuff.c (opt_debug, opt_verbose): New vars.
(set_dns_verbose): New func.
(libdns_switch_port_p): Add debug output.
(resolve_dns_name): Ditto.
(get_dns_cert): Ditto.
(get_dns_cname): Ditto.
(getsrv_libdns, getsrv_standard): Change SRVCOUNT to an unsigend int.
(getsrv): Rename to ...
((get_dns_srv): this. Add arg R_COUNT and return an error. Add debug
output.
* dirmngr/http.c: Adjust for chnaged getsrv().
* dirmngr/ks-engine-hkp.c (map_host): Ditto.
* dirmngr/t-dns-stuff.c (main): Ditto. Call set_dns_verbose.
* dirmngr/dirmngr.c (parse_rereadable_options): Call set_dns_verbose.
--
Due to our switch to Libdns getsrv didn't worked correctly because it
returned -1 for an NXDOMAIN. However, it is perfectly okay to have no
SRV record and thus we change the way this function is called to be
aligned with the other functions and also map NXDOMAIN to a zero SRV
record count.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dirmngr.c (oStandardResolver): New constant.
(opts): New option --standard-resolver.
(parse_rereadable_options): Set option.
* dirmngr/dns-stuff.c: Refactor all code to support the new option.
(standard_resolver): New var.
(enable_standard_resolver, standard_resolver_p): New func.
* dirmngr/http.c (connect_server): Remove USE_DNS_SRV build
conditional.
* dirmngr/ks-engine-hkp.c (map_host): Ditto.
* dirmngr/server.c (cmd_getinfo) <dnsinfo>: Take care of new option
* configure.ac (HAVE_ADNS_IF_TORMODE): Remove var ADNSLIB. ac_define
USE_ADNS in the adns checking code. Remove options --disable-dns-srv
and --disable-dns-cert. Always look for the system resolver. Print
warning if no system resolver was found.
(USE_DNS_CERT, USE_DNS_SRV): Remove ac_defines.
(HAVE_SYSTEM_RESOLVER): New ac_define.
(USE_DNS_SRV): Remove am_conditional; not used anyway.
--
This option allows for runtime switching to the system's standard
resolver. This is mainly useful to work around possible bugs in the
optional resolver libraries (as of now ADNS). Note that on Windows
there is no code to use systems's resolver and thus for full
functionality dirmngr must be build with a separate resolver.
This patch also does way with configure options to disable the use of
CERT and SRV records.
Signed-off-by: Werner Koch <wk@gnupg.org>
* dirmngr/dirmngr.c (http_session_new): If the user isn't talking to
the HKPS pool, and they have not specified any hkp-cacert, then we
should default to the system CAs, rather than nothing.
* doc/dirmngr.texi: Document choice of CAs.
--
Consider three possible classes of dirmngr configuration:
a) no hkps:// keyserver URLs at all (communication with keyservers is
entirely in the clear)
b) hkps:// keyserver URLs, but no hkp-cacert directives
c) hkps:// keyserver URLs, and at least one hkp-cacert directive
class (a) provides no confidentiality of requests.
class (b) currently will never work because the server certificate
cannot be validated.
class (c) is currently supported as intended.
This patch allows users with configurations in class (b) to work as
most users expect (relying on the system certificate authorities),
without affecting users in classes (a) or (c).
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
o minor indentation fix
- wk
* dirmngr/dirmngr.c (parse_readable_options): If we're unable to turn
an argument for hkp-cacert into an absolute filename, terminate
completely.
* dirmngr/http.c (http_register_tls_ca): Show a warning if file is not
immediately accessible, but register it anyway.
--
Without this changeset, the condition of the filesystem when dirmngr
is initialized will have an effect on later activities of dirmngr.
For example, if a file identified by a hkp-cacert directive doesn't
exist when dirmngr starts, dirmngr will behave as though it simply
didn't have the hkp-cacert directive set at all, even if the file
should appear later.
dirmngr currently behaves differently if no hkp-cacert directives have
been set then it does when at least one hkp-cacert directive has been
set. For example, its choice of CA cert for
hkps://hkps.pool.sks-keyservers.net depends on whether a TLS CA file
has been registered. That behavior shouldn't additionally depend on
the state of the filesystem at the time of dirmngr launch.
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
