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dirmngr: Rewrite the LDAP wrapper tool

Browse Source 
* 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>
(cherry picked from commit 39815c023f0371dea01f7c51469b19c06ad18718)
This commit is contained in:
Werner Koch 2021-06-08 08:46:59 +02:00
parent bcb9931562
commit 864ea25198
No known key found for this signature in database
GPG Key ID: E3FDFF218E45B72B
12 changed files with 1252 additions and 696 deletions
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16
dirmngr/Makefile.am
View File

@ -76,6 +76,7 @@ endif
if USE_LDAP
dirmngr_SOURCES += ldapserver.h ldapserver.c ldap.c w32-ldap-help.h \
ldap-wrapper.h ldap-parse-uri.c ldap-parse-uri.h \
ldap-misc.c ldap-misc.h \
ks-engine-ldap.c $(ldap_url) ldap-wrapper.c
ldaplibs = $(LDAPLIBS)
else
@ -93,7 +94,7 @@ endif
dirmngr_LDFLAGS = $(extra_bin_ldflags)
if USE_LDAP
dirmngr_ldap_SOURCES = dirmngr_ldap.c $(ldap_url)
dirmngr_ldap_SOURCES = dirmngr_ldap.c ldap-misc.c ldap-misc.h $(ldap_url)
dirmngr_ldap_CFLAGS = $(GPG_ERROR_CFLAGS) $(LIBGCRYPT_CFLAGS)
dirmngr_ldap_LDFLAGS =
dirmngr_ldap_LDADD = $(libcommon) \
@ -120,7 +121,7 @@ t_common_ldadd = $(libcommon) $(LIBASSUAN_LIBS) $(LIBGCRYPT_LIBS) \
module_tests = t-http-basic
if USE_LDAP
module_tests += t-ldap-parse-uri
module_tests += t-ldap-parse-uri t-ldap-misc
endif
# Test which need a network connections are only used in maintainer mode.
@ -156,16 +157,23 @@ t_http_basic_CFLAGS = -DWITHOUT_NPTH=1 $(USE_C99_CFLAGS) \
t_http_basic_LDADD = $(t_common_ldadd) \
$(NTBTLS_LIBS) $(KSBA_LIBS) $(LIBGNUTLS_LIBS) $(DNSLIBS)
t_ldap_parse_uri_SOURCES = \
t-ldap-parse-uri.c ldap-parse-uri.c ldap-parse-uri.h \
http.c http-common.c dns-stuff.c \
http.c http-common.c dns-stuff.c ldap-misc.c \
$(ldap_url) $(t_common_src)
t_ldap_parse_uri_CFLAGS = -DWITHOUT_NPTH=1 $(USE_C99_CFLAGS) \
$(LIBGCRYPT_CFLAGS) \
$(LIBASSUAN_CFLAGS) $(GPG_ERROR_CFLAGS)
t_ldap_parse_uri_LDADD = $(ldaplibs) $(t_common_ldadd) $(DNSLIBS)
t_ldap_misc_SOURCES = t-ldap-misc.c ldap-misc.c ldap-misc.h $(ldap_url)
t_ldap_misc_CFLAGS = -DWITHOUT_NPTH=1 $(GPG_ERROR_CFLAGS) $(LIBGCRYPT_CFLAGS)
t_ldap_misc_LDFLAGS =
t_ldap_misc_LDADD = $(libcommon) \
$(GPG_ERROR_LIBS) $(LIBGCRYPT_LIBS) $(LDAPLIBS) \
$(LBER_LIBS) $(LIBINTL) $(LIBICONV) $(NETLIBS)
t_dns_stuff_CFLAGS = -DWITHOUT_NPTH=1 $(USE_C99_CFLAGS) \
$(LIBGCRYPT_CFLAGS) \
$(LIBASSUAN_CFLAGS) $(GPG_ERROR_CFLAGS)

4
dirmngr/crlfetch.c
View File

@ -240,7 +240,7 @@ crl_fetch (ctrl_t ctrl, const char *url, ksba_reader_t *reader)
else
{
# if USE_LDAP
err = url_fetch_ldap (ctrl, url, NULL, 0, reader);
err = url_fetch_ldap (ctrl, url, reader);
# else /*!USE_LDAP*/
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
# endif /*!USE_LDAP*/
@ -513,7 +513,7 @@ fetch_cert_by_url (ctrl_t ctrl, const char *url,
else /* Assume LDAP. */
{
#if USE_LDAP
err = url_fetch_ldap (ctrl, url, NULL, 0, &reader);
err = url_fetch_ldap (ctrl, url, &reader);
#else
(void)ctrl;
(void)url;

3
dirmngr/crlfetch.h
View File

@ -62,8 +62,7 @@ void crl_close_reader (ksba_reader_t reader);
/*-- ldap.c --*/
gpg_error_t url_fetch_ldap (ctrl_t ctrl,
const char *url, const char *host, int port,
ksba_reader_t *reader);
const char *url, ksba_reader_t *reader);
gpg_error_t attr_fetch_ldap (ctrl_t ctrl,
const char *dn, const char *attr,
ksba_reader_t *reader);

637
dirmngr/dirmngr_ldap.c
View File

@ -1,5 +1,5 @@
/* dirmngr-ldap.c - The LDAP helper for dirmngr.
* Copyright (C) 2004 g10 Code GmbH
* Copyright (C) 2004, 2021 g10 Code GmbH
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* This file is part of GnuPG.
@ -52,10 +52,10 @@
#include "../common/stringhelp.h"
#include "../common/mischelp.h"
#include "../common/strlist.h"
#include "../common/i18n.h"
#include "../common/util.h"
#include "../common/init.h"
#include "ldap-misc.h"
/* There is no need for the npth_unprotect and leave functions here;
* thus we redefine them to nops. We keep them in the code just for
@ -87,11 +87,11 @@ enum
oUser,
oPass,
oEnvPass,
oDN,
oFilter,
oBase,
oAttr,
oTls,
oStartTLS,
oLdapTLS,
oNtds,
oOnlySearchTimeout,
oLogWithPID
};
@ -99,40 +99,41 @@ enum
/* The list of options as used by the argparse.c code. */
static gpgrt_opt_t opts[] = {
{ oVerbose, "verbose", 0, N_("verbose") },
{ oQuiet, "quiet", 0, N_("be somewhat more quiet") },
{ oTimeout, "timeout", 1, N_("|N|set LDAP timeout to N seconds")},
{ oMulti, "multi", 0, N_("return all values in"
" a record oriented format")},
{ oVerbose, "verbose", 0, "verbose" },
{ oQuiet, "quiet", 0, "be somewhat more quiet" },
{ oTimeout, "timeout", 1, "|N|set LDAP timeout to N seconds"},
{ oMulti, "multi", 0, "return all values in"
" a record oriented format"},
{ oProxy, "proxy", 2,
N_("|NAME|ignore host part and connect through NAME")},
{ oTls, "tls", 0, N_("force a TLS connection")},
{ oHost, "host", 2, N_("|NAME|connect to host NAME")},
{ oPort, "port", 1, N_("|N|connect to port N")},
{ oUser, "user", 2, N_("|NAME|use user NAME for authentication")},
{ oPass, "pass", 2, N_("|PASS|use password PASS"
" for authentication")},
{ oEnvPass, "env-pass", 0, N_("take password from $DIRMNGR_LDAP_PASS")},
{ oDN, "dn", 2, N_("|STRING|query DN STRING")},
{ oFilter, "filter", 2, N_("|STRING|use STRING as filter expression")},
{ oAttr, "attr", 2, N_("|STRING|return the attribute STRING")},
"|NAME|ignore host part and connect through NAME"},
{ oStartTLS, "starttls", 0, "use STARTLS for the conenction"},
{ oLdapTLS, "ldaptls", 0, "use a TLS for the connection"},
{ oNtds, "ntds", 0, "authenticate using AD"},
{ oHost, "host", 2, "|NAME|connect to host NAME"},
{ oPort, "port", 1, "|N|connect to port N"},
{ oUser, "user", 2, "|NAME|use NAME for authentication"},
{ oPass, "pass", 2, "|PASS|use password PASS"
" for authentication"},
{ oEnvPass, "env-pass", 0, "take password from $DIRMNGR_LDAP_PASS"},
{ oBase, "base", 2, "|DN|Start query at DN"},
{ oAttr, "attr", 2, "|STRING|return the attribute STRING"},
{ oOnlySearchTimeout, "only-search-timeout", 0, "@"},
{ oLogWithPID,"log-with-pid", 0, "@"},
ARGPARSE_end ()
};
/* A structure with module options. This is not a static variable
because if we are not build as a standalone binary, each thread
using this module needs to handle its own values. */
struct my_opt_s
/* A structure with module options. */
static struct
{
int quiet;
int verbose;
my_ldap_timeval_t timeout;/* Timeout for the LDAP search functions. */
unsigned int alarm_timeout; /* And for the alarm based timeout. */
int multi;
int force_tls;
int starttls;
int ldaptls;
int ntds;
estream_t outstream; /* Send output to this stream. */
@ -143,18 +144,17 @@ struct my_opt_s
char *pass; /* Authentication password. */
char *host; /* Override host. */
int port; /* Override port. */
char *dn; /* Override DN. */
char *filter;/* Override filter. */
char *base; /* Override DN. */
char *attr; /* Override attribute. */
};
typedef struct my_opt_s *my_opt_t;
} opt;
/* Prototypes. */
#ifndef HAVE_W32_SYSTEM
static void catch_alarm (int dummy);
#endif
static int process_url (my_opt_t myopt, const char *url);
static gpg_error_t connect_ldap (LDAP **r_ld);
static gpg_error_t process_filter (LDAP *ld, const char *string);
@ -172,14 +172,14 @@ my_strusage (int level)
case 13: p = VERSION; break;
case 14: p = GNUPG_DEF_COPYRIGHT_LINE; break;
case 17: p = PRINTABLE_OS_NAME; break;
case 19: p = _("Please report bugs to <@EMAIL@>.\n"); break;
case 19: p = "Please report bugs to <@EMAIL@>.\n"; break;
case 49: p = PACKAGE_BUGREPORT; break;
case 1:
case 40: p =
_("Usage: dirmngr_ldap [options] [URL] (-h for help)\n");
"Usage: dirmngr_ldap [options] filters (-h for help)\n";
break;
case 41: p =
_("Syntax: dirmngr_ldap [options] [URL]\n"
("Syntax: dirmngr_ldap [options] filters\n"
"Internal LDAP helper for Dirmngr\n"
"Interface and options may change without notice\n");
break;
@ -197,29 +197,23 @@ main (int argc, char **argv)
int any_err = 0;
char *p;
int only_search_timeout = 0;
struct my_opt_s my_opt_buffer;
my_opt_t myopt = &my_opt_buffer;
char *malloced_buffer1 = NULL;
memset (&my_opt_buffer, 0, sizeof my_opt_buffer);
LDAP *ld;
early_system_init ();
gpgrt_set_strusage (my_strusage);
log_set_prefix ("dirmngr_ldap", GPGRT_LOG_WITH_PREFIX);
/* Setup I18N and common subsystems. */
i18n_init();
init_common_subsystems (&argc, &argv);
es_set_binary (es_stdout);
myopt->outstream = es_stdout;
opt.outstream = es_stdout;
/* LDAP defaults */
myopt->timeout.tv_sec = DEFAULT_LDAP_TIMEOUT;
myopt->timeout.tv_usec = 0;
myopt->alarm_timeout = 0;
opt.timeout.tv_sec = DEFAULT_LDAP_TIMEOUT;
opt.timeout.tv_usec = 0;
opt.alarm_timeout = 0;
/* Parse the command line. */
pargs.argc = &argc;
@ -229,27 +223,28 @@ main (int argc, char **argv)
{
switch (pargs.r_opt)
{
case oVerbose: myopt->verbose++; break;
case oQuiet: myopt->quiet++; break;
case oVerbose: opt.verbose++; break;
case oQuiet: opt.quiet++; break;
case oTimeout:
myopt->timeout.tv_sec = pargs.r.ret_int;
myopt->timeout.tv_usec = 0;
myopt->alarm_timeout = pargs.r.ret_int;
opt.timeout.tv_sec = pargs.r.ret_int;
opt.timeout.tv_usec = 0;
opt.alarm_timeout = pargs.r.ret_int;
break;
case oOnlySearchTimeout: only_search_timeout = 1; break;
case oMulti: myopt->multi = 1; break;
case oUser: myopt->user = pargs.r.ret_str; break;
case oPass: myopt->pass = pargs.r.ret_str; break;
case oStartTLS: opt.starttls = 1; opt.ldaptls = 0; break;
case oLdapTLS: opt.starttls = 0; opt.ldaptls = 1; break;
case oNtds: opt.ntds = 1; break;
case oMulti: opt.multi = 1; break;
case oUser: opt.user = pargs.r.ret_str; break;
case oPass: opt.pass = pargs.r.ret_str; break;
case oEnvPass:
myopt->pass = getenv ("DIRMNGR_LDAP_PASS");
opt.pass = getenv ("DIRMNGR_LDAP_PASS");
break;
case oProxy: myopt->proxy = pargs.r.ret_str; break;
case oTls: myopt->force_tls = 1; break;
case oHost: myopt->host = pargs.r.ret_str; break;
case oPort: myopt->port = pargs.r.ret_int; break;
case oDN: myopt->dn = pargs.r.ret_str; break;
case oFilter: myopt->filter = pargs.r.ret_str; break;
case oAttr: myopt->attr = pargs.r.ret_str; break;
case oProxy: opt.proxy = pargs.r.ret_str; break;
case oHost: opt.host = pargs.r.ret_str; break;
case oPort: opt.port = pargs.r.ret_int; break;
case oBase: opt.base = pargs.r.ret_str; break;
case oAttr: opt.attr = pargs.r.ret_str; break;
case oLogWithPID:
{
unsigned int oldflags;
@ -266,36 +261,45 @@ main (int argc, char **argv)
gpgrt_argparse (NULL, &pargs, NULL);
if (only_search_timeout)
myopt->alarm_timeout = 0;
opt.alarm_timeout = 0;
if (myopt->proxy)
if (opt.proxy)
{
malloced_buffer1 = xtrystrdup (myopt->proxy);
malloced_buffer1 = xtrystrdup (opt.proxy);
if (!malloced_buffer1)
{
log_error ("error copying string: %s\n", strerror (errno));
return 1;
}
myopt->host = malloced_buffer1;
p = strchr (myopt->host, ':');
opt.host = malloced_buffer1;
p = strchr (opt.host, ':');
if (p)
{
*p++ = 0;
myopt->port = atoi (p);
opt.port = atoi (p);
}
if (!myopt->port)
myopt->port = 389; /* make sure ports gets overridden. */
if (!opt.port)
opt.port = 389; /* make sure ports gets overridden. */
}
if (myopt->port < 0 || myopt->port > 65535)
log_error (_("invalid port number %d\n"), myopt->port);
if (opt.port < 0 || opt.port > 65535)
log_error ("invalid port number %d\n", opt.port);
if (!opt.port)
opt.port = opt.ldaptls? 636 : 389;
#ifndef HAVE_W32_SYSTEM
if (!opt.host)
opt.host = "localhost";
#endif
if (log_get_errorcount (0))
exit (2);
if (argc < 1)
gpgrt_usage (1);
if (myopt->alarm_timeout)
if (opt.alarm_timeout)
{
#ifndef HAVE_W32_SYSTEM
# if defined(HAVE_SIGACTION) && defined(HAVE_STRUCT_SIGACTION)
@ -312,9 +316,15 @@ main (int argc, char **argv)
#endif
}
for (; argc; argc--, argv++)
if (process_url (myopt, *argv))
if (connect_ldap (&ld))
any_err = 1;
else
{
for (; argc; argc--, argv++)
if (process_filter (ld, *argv))
any_err = 1;
ldap_unbind (ld);
}
xfree (malloced_buffer1);
return any_err;
@ -345,16 +355,16 @@ alarm_thread (void *arg)
static void
set_timeout (my_opt_t myopt)
set_timeout (void)
{
if (myopt->alarm_timeout)
if (opt.alarm_timeout)
{
#ifdef HAVE_W32_SYSTEM
static HANDLE timer;
LARGE_INTEGER due_time;
/* A negative value is a relative time. */
due_time.QuadPart = (unsigned long long)-10000000 * myopt->alarm_timeout;
due_time.QuadPart = (unsigned long long)-10000000 * opt.alarm_timeout;
if (!timer)
{
@ -376,15 +386,192 @@ set_timeout (my_opt_t myopt)
else /* Retrigger the timer. */
SetWaitableTimer (timer, &due_time, 0, NULL, NULL, 0);
#else
alarm (myopt->alarm_timeout);
alarm (opt.alarm_timeout);
#endif
}
}
/* Connect to the ldap server. On success the connection handle is
* stored at R_LD. */
static gpg_error_t
connect_ldap (LDAP **r_ld)
{
gpg_error_t err = 0;
int lerr;
LDAP *ld = NULL;
#ifndef HAVE_W32_SYSTEM
char *tmpstr;
#endif
*r_ld = NULL;
if (opt.starttls || opt.ldaptls)
{
#ifndef HAVE_LDAP_START_TLS_S
log_error ("ldap: can't connect to the server: no TLS support.");
err = GPG_ERR_LDAP_NOT_SUPPORTED;
goto leave;
#endif
}
set_timeout ();
#ifdef HAVE_W32_SYSTEM
npth_unprotect ();
ld = ldap_sslinit (opt.host, opt.port, opt.ldaptls);
npth_protect ();
if (!ld)
{
lerr = LdapGetLastError ();
err = ldap_err_to_gpg_err (lerr);
log_error ("error initializing LDAP '%s:%d': %s\n",
opt.host, opt.port, ldap_err2string (lerr));
goto leave;
}
#else /* Unix */
tmpstr = xtryasprintf ("%s://%s:%d",
opt.ldaptls? "ldaps" : "ldap",
opt.host, opt.port);
if (!tmpstr)
{
err = gpg_error_from_syserror ();
goto leave;
}
npth_unprotect ();
lerr = ldap_initialize (&ld, tmpstr);
npth_protect ();
if (lerr || !ld)
{
err = ldap_err_to_gpg_err (lerr);
log_error ("error initializing LDAP '%s': %s\n",
tmpstr, ldap_err2string (lerr));
xfree (tmpstr);
goto leave;
}
xfree (tmpstr);
#endif /* Unix */
if (opt.verbose)
log_info ("LDAP connected to '%s:%d'%s\n",
opt.host, opt.port,
opt.starttls? " using STARTTLS" :
opt.ldaptls? " using LDAP-over-TLS" : "");
#ifdef HAVE_LDAP_SET_OPTION
{
int ver = LDAP_VERSION3;
lerr = ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &ver);
if (lerr != LDAP_SUCCESS)
{
log_error ("unable to go to LDAP 3: %s\n", ldap_err2string (lerr));
err = ldap_err_to_gpg_err (lerr);
goto leave;
}
}
#endif
#ifdef HAVE_LDAP_START_TLS_S
if (opt.starttls)
{
#ifndef HAVE_W32_SYSTEM
int check_cert = LDAP_OPT_X_TLS_HARD; /* LDAP_OPT_X_TLS_NEVER */
lerr = ldap_set_option (ld, LDAP_OPT_X_TLS_REQUIRE_CERT, &check_cert);
if (lerr)
{
log_error ("ldap: error setting an TLS option: %s\n",
ldap_err2string (lerr));
err = ldap_err_to_gpg_err (lerr);
goto leave;
}
#else
/* On Windows, the certificates are checked by default. If the
option to disable checking mentioned above is ever
implemented, the way to do that on Windows is to install a
callback routine using ldap_set_option (..,
LDAP_OPT_SERVER_CERTIFICATE, ..); */
#endif
npth_unprotect ();
lerr = ldap_start_tls_s (ld,
#ifdef HAVE_W32_SYSTEM
/* ServerReturnValue, result */
NULL, NULL,
#endif
/* ServerControls, ClientControls */
NULL, NULL);
npth_protect ();
if (lerr)
{
log_error ("ldap: error switching to STARTTLS mode: %s\n",
ldap_err2string (lerr));
err = ldap_err_to_gpg_err (lerr);
goto leave;
}
}
#endif
if (opt.ntds)
{
if (opt.verbose)
log_info ("binding to current user via AD\n");
#ifdef HAVE_W32_SYSTEM
npth_unprotect ();
lerr = ldap_bind_s (ld, NULL, NULL, LDAP_AUTH_NEGOTIATE);
npth_protect ();
if (lerr != LDAP_SUCCESS)
{
log_error ("error binding to LDAP via AD: %s\n",
ldap_err2string (lerr));
err = ldap_err_to_gpg_err (lerr);
goto leave;
}
#else /* Unix */
err = gpg_error (GPG_ERR_NOT_SUPPORTED);
goto leave;
#endif /* Unix */
}
else if (opt.user)
{
if (opt.verbose)
log_info ("LDAP bind to '%s', password '%s'\n",
opt.user, opt.pass ? ">not_shown<" : ">none<");
npth_unprotect ();
lerr = ldap_simple_bind_s (ld, opt.user, opt.pass);
npth_protect ();
if (lerr != LDAP_SUCCESS)
{
log_error ("error binding to LDAP: %s\n", ldap_err2string (lerr));
err = ldap_err_to_gpg_err (lerr);
goto leave;
}
}
else
{
/* By default we don't bind as there is usually no need to. */
}
leave:
if (err)
{
if (ld)
ldap_unbind (ld);
}
else
*r_ld = ld;
return err;
}
/* Helper for fetch_ldap(). */
static int
print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
print_ldap_entries (LDAP *ld, LDAPMessage *msg, char *want_attr)
{
LDAPMessage *item;
int any = 0;
@ -396,15 +583,15 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
BerElement *berctx;
char *attr;
if (myopt->verbose > 1)
log_info (_("scanning result for attribute '%s'\n"),
if (opt.verbose > 1)
log_info ("scanning result for attribute '%s'\n",
want_attr? want_attr : "[all]");
if (myopt->multi)
if (opt.multi)
{ /* Write item marker. */
if (es_fwrite ("I\0\0\0\0", 5, 1, myopt->outstream) != 1)
if (es_fwrite ("I\0\0\0\0", 5, 1, opt.outstream) != 1)
{
log_error (_("error writing to stdout: %s\n"),
log_error ("error writing to stdout: %s\n",
strerror (errno));
return -1;
}
@ -420,10 +607,10 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
struct berval **values;
int idx;
if (myopt->verbose > 1)
log_info (_(" available attribute '%s'\n"), attr);
if (opt.verbose > 1)
log_info (" available attribute '%s'\n", attr);
set_timeout (myopt);
set_timeout ();
/* I case we want only one attribute we do a case
insensitive compare without the optional extension
@ -458,23 +645,23 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
if (!values)
{
if (myopt->verbose)
log_info (_("attribute '%s' not found\n"), attr);
if (opt.verbose)
log_info ("attribute '%s' not found\n", attr);
ldap_memfree (attr);
continue;
}
if (myopt->verbose)
if (opt.verbose)
{
log_info (_("found attribute '%s'\n"), attr);
if (myopt->verbose > 1)
log_info ("found attribute '%s'\n", attr);
if (opt.verbose > 1)
for (idx=0; values[idx]; idx++)
log_info (" length[%d]=%d\n",
idx, (int)values[0]->bv_len);
}
if (myopt->multi)
if (opt.multi)
{ /* Write attribute marker. */
unsigned char tmp[5];
size_t n = strlen (attr);
@ -484,10 +671,10 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
tmp[2] = (n >> 16);
tmp[3] = (n >> 8);
tmp[4] = (n);
if (es_fwrite (tmp, 5, 1, myopt->outstream) != 1
|| es_fwrite (attr, n, 1, myopt->outstream) != 1)
if (es_fwrite (tmp, 5, 1, opt.outstream) != 1
|| es_fwrite (attr, n, 1, opt.outstream) != 1)
{
log_error (_("error writing to stdout: %s\n"),
log_error ("error writing to stdout: %s\n",
strerror (errno));
ldap_value_free_len (values);
ldap_memfree (attr);
@ -498,7 +685,7 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
for (idx=0; values[idx]; idx++)
{
if (myopt->multi)
if (opt.multi)
{ /* Write value marker. */
unsigned char tmp[5];
size_t n = values[0]->bv_len;
@ -509,9 +696,9 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
tmp[3] = (n >> 8);
tmp[4] = (n);
if (es_fwrite (tmp, 5, 1, myopt->outstream) != 1)
if (es_fwrite (tmp, 5, 1, opt.outstream) != 1)
{
log_error (_("error writing to stdout: %s\n"),
log_error ("error writing to stdout: %s\n",
strerror (errno));
ldap_value_free_len (values);
ldap_memfree (attr);
@ -521,9 +708,9 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
}
if (es_fwrite (values[0]->bv_val, values[0]->bv_len,
1, myopt->outstream) != 1)
1, opt.outstream) != 1)
{
log_error (_("error writing to stdout: %s\n"),
log_error ("error writing to stdout: %s\n",
strerror (errno));
ldap_value_free_len (values);
ldap_memfree (attr);
@ -532,18 +719,18 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
}
any = 1;
if (!myopt->multi)
if (!opt.multi)
break; /* Print only the first value. */
}
ldap_value_free_len (values);
ldap_memfree (attr);
if (want_attr || !myopt->multi)
if (want_attr || !opt.multi)
break; /* We only want to return the first attribute. */
}
ber_free (berctx, 0);
}
if (myopt->verbose > 1 && any)
if (opt.verbose > 1 && any)
log_info ("result has been printed\n");
return any?0:-1;
@ -551,183 +738,51 @@ print_ldap_entries (my_opt_t myopt, LDAP *ld, LDAPMessage *msg, char *want_attr)
/* Helper for the URL based LDAP query. */
/* Fetch data from the server at LD using FILTER. */
static int
fetch_ldap (my_opt_t myopt, const char *url, const LDAPURLDesc *ludp)
fetch_ldap (LDAP *ld, const char *base, int scope, const char *filter)
{
LDAP *ld;
gpg_error_t err;
int lerr;
LDAPMessage *msg;
int rc = 0;
char *host, *dn, *filter, *attrs[2], *attr;
int port;
int ret;
int usetls;
char *attrs[2];
host = myopt->host? myopt->host : ludp->lud_host;
port = myopt->port? myopt->port : ludp->lud_port;
dn = myopt->dn? myopt->dn : ludp->lud_dn;
filter = myopt->filter? myopt->filter : ludp->lud_filter;
attrs[0] = myopt->attr? myopt->attr : ludp->lud_attrs? ludp->lud_attrs[0]:NULL;
attrs[1] = NULL;
attr = attrs[0];
if (filter && !*filter)
filter = NULL;
if (!port && myopt->force_tls)
port = 636;
else if (!port)
port = (ludp->lud_scheme && !strcmp (ludp->lud_scheme, "ldaps"))? 636:389;
if (myopt->verbose)
if (opt.verbose)
{
log_info (_("processing url '%s'\n"), url);
if (myopt->force_tls)
log_info ("forcing tls\n");
else
log_info ("not forcing tls\n");
if (myopt->user)
log_info (_(" user '%s'\n"), myopt->user);
if (myopt->pass)
log_info (_(" pass '%s'\n"), *myopt->pass?"*****":"");
if (host)
log_info (_(" host '%s'\n"), host);
log_info (_(" port %d\n"), port);
if (dn)
log_info (_(" DN '%s'\n"), dn);
log_info ("fetching using");
if (base)
log_printf (" base '%s'", base);
if (filter)
log_info (_(" filter '%s'\n"), filter);
if (myopt->multi && !myopt->attr && ludp->lud_attrs)
{
int i;
for (i=0; ludp->lud_attrs[i]; i++)
log_info (_(" attr '%s'\n"), ludp->lud_attrs[i]);
}
else if (attr)
log_info (_(" attr '%s'\n"), attr);
log_printf (" filter '%s'", filter);
log_printf ("\n");
}
attrs[0] = opt.attr;
attrs[1] = NULL;
if (!host || !*host)
{
log_error (_("no host name in '%s'\n"), url);
return -1;
}
if (!myopt->multi && !attr)
{
log_error (_("no attribute given for query '%s'\n"), url);
return -1;
}
if (!myopt->multi && !myopt->attr
&& ludp->lud_attrs && ludp->lud_attrs[0] && ludp->lud_attrs[1])
log_info (_("WARNING: using first attribute only\n"));
set_timeout (myopt);
usetls = (myopt->force_tls
|| (ludp->lud_scheme && !strcmp (ludp->lud_scheme, "ldaps")));
#if HAVE_W32_SYSTEM
if (1)
{
set_timeout ();
npth_unprotect ();
ld = ldap_sslinit (host, port, usetls);
npth_protect ();
if (!ld)
{
ret = LdapGetLastError ();
log_error (_("LDAP init to '%s:%d' failed: %s\n"),
host, port, ldap_err2string (ret));
return -1;
}
}
#else /*!W32*/
if (usetls)
{
char *uri;
uri = xtryasprintf ("ldaps://%s:%d", host, port);
if (!uri)
{
log_error (_("error allocating memory: %s\n"),
gpg_strerror (gpg_error_from_syserror ()));
return -1;
}
npth_unprotect ();
ret = ldap_initialize (&ld, uri);
npth_protect ();
if (ret)
{
log_error (_("LDAP init to '%s' failed: %s\n"),
uri, ldap_err2string (ret));
xfree (uri);
return -1;
}
else if (myopt->verbose)
log_info (_("LDAP init to '%s' done\n"), uri);
xfree (uri);
}
else
{
/* Keep the old way so to avoid regressions. Eventually we
* should really consider the supplied scheme and use only
* ldap_initialize. */
npth_unprotect ();
ld = ldap_init (host, port);
npth_protect ();
if (!ld)
{
log_error (_("LDAP init to '%s:%d' failed: %s\n"),
host, port, strerror (errno));
return -1;
}
}
#endif /*!W32*/
npth_unprotect ();
/* Fixme: Can we use MYOPT->user or is it shared with other theeads?. */
ret = ldap_simple_bind_s (ld, myopt->user, myopt->pass);
npth_protect ();
#ifdef LDAP_VERSION3
if (ret == LDAP_PROTOCOL_ERROR)
{
/* Protocol error could mean that the server only supports v3. */
int version = LDAP_VERSION3;
if (myopt->verbose)
log_info ("protocol error; retrying bind with v3 protocol\n");
npth_unprotect ();
ldap_set_option (ld, LDAP_OPT_PROTOCOL_VERSION, &version);
ret = ldap_simple_bind_s (ld, myopt->user, myopt->pass);
npth_protect ();
}
#endif
if (ret)
{
log_error (_("binding to '%s:%d' failed: %s\n"),
host, port, ldap_err2string (ret));
ldap_unbind (ld);
return -1;
}
set_timeout (myopt);
npth_unprotect ();
rc = ldap_search_st (ld, dn, ludp->lud_scope, filter,
myopt->multi && !myopt->attr && ludp->lud_attrs?
ludp->lud_attrs:attrs,
lerr = ldap_search_st (ld, base, scope, filter,
attrs,
0,
&myopt->timeout, &msg);
&opt.timeout, &msg);
npth_protect ();
if (rc == LDAP_SIZELIMIT_EXCEEDED && myopt->multi)
if (lerr == LDAP_SIZELIMIT_EXCEEDED && opt.multi)
{
if (es_fwrite ("E\0\0\0\x09truncated", 14, 1, myopt->outstream) != 1)
if (es_fwrite ("E\0\0\0\x09truncated", 14, 1, opt.outstream) != 1)
{
log_error (_("error writing to stdout: %s\n"), strerror (errno));
log_error ("error writing to stdout: %s\n", strerror (errno));
return -1;
}
}
else if (rc)
else if (lerr)
{
log_error (_("searching '%s' failed: %s\n"),
url, ldap_err2string (rc));
if (rc != LDAP_NO_SUCH_OBJECT)
log_error ("searching '%s' failed: %s\n",
filter, ldap_err2string (lerr));
if (lerr != LDAP_NO_SUCH_OBJECT)
{
/* FIXME: Need deinit (ld)? */
/* Hmmm: Do we need to released MSG in case of an error? */
@ -735,39 +790,43 @@ fetch_ldap (my_opt_t myopt, const char *url, const LDAPURLDesc *ludp)
}
}
rc = print_ldap_entries (myopt, ld, msg, myopt->multi? NULL:attr);
err = print_ldap_entries (ld, msg, opt.multi? NULL:opt.attr);
ldap_msgfree (msg);
ldap_unbind (ld);
return rc;
return err;
}
/* Main processing. Take the URL and run the LDAP query. The result
is printed to stdout, errors are logged to the log stream. */
static int
process_url (my_opt_t myopt, const char *url)
/* Main processing. Take the filter and run the LDAP query. The
* result is printed to stdout, errors are logged to the log stream.
* To allow searching with a different base it is possible to extend
* the filer. For example:
*
* ^CN=foo, OU=My Users&(objectClasses=*)
*
* Uses "CN=foo, OU=My Users" as base DN and "(objectClasses=*)" as
* filter. If the base prefix includes an ampersand, it needs to be
* doubled. The usual escaping rules for DNs (for the base) and
* filters apply. If no scope is given (see ldap_parse_extfilter for
* the syntax) subtree scope is used.
*/
static gpg_error_t
process_filter (LDAP *ld, const char *string)
{
int rc;
LDAPURLDesc *ludp = NULL;
gpg_error_t err;
char *base, *filter;
int scope = -1;
err = ldap_parse_extfilter (string, 0, &base, &scope, &filter);
if (!err)
err = fetch_ldap (ld,
base? base : opt.base,
scope == -1? LDAP_SCOPE_SUBTREE : scope,
filter);
if (!ldap_is_ldap_url (url))
{
log_error (_("'%s' is not an LDAP URL\n"), url);
return -1;
}
if (ldap_url_parse (url, &ludp))
{
log_error (_("'%s' is an invalid LDAP URL\n"), url);
return -1;
}
rc = fetch_ldap (myopt, url, ludp);
ldap_free_urldesc (ludp);
return rc;
xfree (base);
xfree (filter);
return err;
}

188
dirmngr/ks-engine-ldap.c
View File

@ -28,27 +28,15 @@
# include <getopt.h>
#endif
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#ifdef _WIN32
# include <winsock2.h>
# include <winldap.h>
#else
# ifdef NEED_LBER_H
# include <lber.h>
# endif
/* For OpenLDAP, to enable the API that we're using. */
# define LDAP_DEPRECATED 1
# include <ldap.h>
#endif
#include <npth.h>
#include "dirmngr.h"
#include "misc.h"
#include "../common/userids.h"
#include "../common/mbox-util.h"
#include "ks-engine.h"
#include "ldap-misc.h"
#include "ldap-parse-uri.h"
#include "ldapserver.h"
@ -60,177 +48,11 @@
#define SERVERINFO_NTDS 8 /* Server is an Active Directory. */
#ifndef HAVE_TIMEGM
time_t timegm(struct tm *tm);
#endif
/* Convert an LDAP error to a GPG error. */
static int
ldap_err_to_gpg_err (int code)
{
gpg_err_code_t ec;
switch (code)
{
#ifdef LDAP_X_CONNECTING
case LDAP_X_CONNECTING: ec = GPG_ERR_LDAP_X_CONNECTING; break;
#endif
case LDAP_REFERRAL_LIMIT_EXCEEDED: ec = GPG_ERR_LDAP_REFERRAL_LIMIT; break;
case LDAP_CLIENT_LOOP: ec = GPG_ERR_LDAP_CLIENT_LOOP; break;
case LDAP_NO_RESULTS_RETURNED: ec = GPG_ERR_LDAP_NO_RESULTS; break;
case LDAP_CONTROL_NOT_FOUND: ec = GPG_ERR_LDAP_CONTROL_NOT_FOUND; break;
case LDAP_NOT_SUPPORTED: ec = GPG_ERR_LDAP_NOT_SUPPORTED; break;
case LDAP_CONNECT_ERROR: ec = GPG_ERR_LDAP_CONNECT; break;
case LDAP_NO_MEMORY: ec = GPG_ERR_LDAP_NO_MEMORY; break;
case LDAP_PARAM_ERROR: ec = GPG_ERR_LDAP_PARAM; break;
case LDAP_USER_CANCELLED: ec = GPG_ERR_LDAP_USER_CANCELLED; break;
case LDAP_FILTER_ERROR: ec = GPG_ERR_LDAP_FILTER; break;
case LDAP_AUTH_UNKNOWN: ec = GPG_ERR_LDAP_AUTH_UNKNOWN; break;
case LDAP_TIMEOUT: ec = GPG_ERR_LDAP_TIMEOUT; break;
case LDAP_DECODING_ERROR: ec = GPG_ERR_LDAP_DECODING; break;
case LDAP_ENCODING_ERROR: ec = GPG_ERR_LDAP_ENCODING; break;
case LDAP_LOCAL_ERROR: ec = GPG_ERR_LDAP_LOCAL; break;
case LDAP_SERVER_DOWN: ec = GPG_ERR_LDAP_SERVER_DOWN; break;
case LDAP_SUCCESS: ec = GPG_ERR_LDAP_SUCCESS; break;
case LDAP_OPERATIONS_ERROR: ec = GPG_ERR_LDAP_OPERATIONS; break;
case LDAP_PROTOCOL_ERROR: ec = GPG_ERR_LDAP_PROTOCOL; break;
case LDAP_TIMELIMIT_EXCEEDED: ec = GPG_ERR_LDAP_TIMELIMIT; break;
case LDAP_SIZELIMIT_EXCEEDED: ec = GPG_ERR_LDAP_SIZELIMIT; break;
case LDAP_COMPARE_FALSE: ec = GPG_ERR_LDAP_COMPARE_FALSE; break;
case LDAP_COMPARE_TRUE: ec = GPG_ERR_LDAP_COMPARE_TRUE; break;
case LDAP_AUTH_METHOD_NOT_SUPPORTED: ec=GPG_ERR_LDAP_UNSUPPORTED_AUTH;break;
case LDAP_STRONG_AUTH_REQUIRED: ec = GPG_ERR_LDAP_STRONG_AUTH_RQRD; break;
case LDAP_PARTIAL_RESULTS: ec = GPG_ERR_LDAP_PARTIAL_RESULTS; break;
case LDAP_REFERRAL: ec = GPG_ERR_LDAP_REFERRAL; break;
#ifdef LDAP_ADMINLIMIT_EXCEEDED
case LDAP_ADMINLIMIT_EXCEEDED: ec = GPG_ERR_LDAP_ADMINLIMIT; break;
#endif
#ifdef LDAP_UNAVAILABLE_CRITICAL_EXTENSION
case LDAP_UNAVAILABLE_CRITICAL_EXTENSION:
ec = GPG_ERR_LDAP_UNAVAIL_CRIT_EXTN; break;
#endif
case LDAP_CONFIDENTIALITY_REQUIRED: ec = GPG_ERR_LDAP_CONFIDENT_RQRD; break;
case LDAP_SASL_BIND_IN_PROGRESS: ec = GPG_ERR_LDAP_SASL_BIND_INPROG; break;
case LDAP_NO_SUCH_ATTRIBUTE: ec = GPG_ERR_LDAP_NO_SUCH_ATTRIBUTE; break;
case LDAP_UNDEFINED_TYPE: ec = GPG_ERR_LDAP_UNDEFINED_TYPE; break;
case LDAP_INAPPROPRIATE_MATCHING: ec = GPG_ERR_LDAP_BAD_MATCHING; break;
case LDAP_CONSTRAINT_VIOLATION: ec = GPG_ERR_LDAP_CONST_VIOLATION; break;
#ifdef LDAP_TYPE_OR_VALUE_EXISTS
case LDAP_TYPE_OR_VALUE_EXISTS: ec = GPG_ERR_LDAP_TYPE_VALUE_EXISTS; break;
#endif
case LDAP_INVALID_SYNTAX: ec = GPG_ERR_LDAP_INV_SYNTAX; break;
case LDAP_NO_SUCH_OBJECT: ec = GPG_ERR_LDAP_NO_SUCH_OBJ; break;
case LDAP_ALIAS_PROBLEM: ec = GPG_ERR_LDAP_ALIAS_PROBLEM; break;
case LDAP_INVALID_DN_SYNTAX: ec = GPG_ERR_LDAP_INV_DN_SYNTAX; break;
case LDAP_IS_LEAF: ec = GPG_ERR_LDAP_IS_LEAF; break;
case LDAP_ALIAS_DEREF_PROBLEM: ec = GPG_ERR_LDAP_ALIAS_DEREF; break;
#ifdef LDAP_X_PROXY_AUTHZ_FAILURE
case LDAP_X_PROXY_AUTHZ_FAILURE: ec = GPG_ERR_LDAP_X_PROXY_AUTH_FAIL; break;
#endif
case LDAP_INAPPROPRIATE_AUTH: ec = GPG_ERR_LDAP_BAD_AUTH; break;
case LDAP_INVALID_CREDENTIALS: ec = GPG_ERR_LDAP_INV_CREDENTIALS; break;
#ifdef LDAP_INSUFFICIENT_ACCESS
case LDAP_INSUFFICIENT_ACCESS: ec = GPG_ERR_LDAP_INSUFFICIENT_ACC; break;
#endif
case LDAP_BUSY: ec = GPG_ERR_LDAP_BUSY; break;
case LDAP_UNAVAILABLE: ec = GPG_ERR_LDAP_UNAVAILABLE; break;
case LDAP_UNWILLING_TO_PERFORM: ec = GPG_ERR_LDAP_UNWILL_TO_PERFORM; break;
case LDAP_LOOP_DETECT: ec = GPG_ERR_LDAP_LOOP_DETECT; break;
case LDAP_NAMING_VIOLATION: ec = GPG_ERR_LDAP_NAMING_VIOLATION; break;
case LDAP_OBJECT_CLASS_VIOLATION: ec = GPG_ERR_LDAP_OBJ_CLS_VIOLATION; break;
case LDAP_NOT_ALLOWED_ON_NONLEAF: ec=GPG_ERR_LDAP_NOT_ALLOW_NONLEAF;break;
case LDAP_NOT_ALLOWED_ON_RDN: ec = GPG_ERR_LDAP_NOT_ALLOW_ON_RDN; break;
case LDAP_ALREADY_EXISTS: ec = GPG_ERR_LDAP_ALREADY_EXISTS; break;
case LDAP_NO_OBJECT_CLASS_MODS: ec = GPG_ERR_LDAP_NO_OBJ_CLASS_MODS; break;
case LDAP_RESULTS_TOO_LARGE: ec = GPG_ERR_LDAP_RESULTS_TOO_LARGE; break;
case LDAP_AFFECTS_MULTIPLE_DSAS: ec = GPG_ERR_LDAP_AFFECTS_MULT_DSAS; break;
#ifdef LDAP_VLV_ERROR
case LDAP_VLV_ERROR: ec = GPG_ERR_LDAP_VLV; break;
#endif
case LDAP_OTHER: ec = GPG_ERR_LDAP_OTHER; break;
#ifdef LDAP_CUP_RESOURCES_EXHAUSTED
case LDAP_CUP_RESOURCES_EXHAUSTED: ec=GPG_ERR_LDAP_CUP_RESOURCE_LIMIT;break;
case LDAP_CUP_SECURITY_VIOLATION: ec=GPG_ERR_LDAP_CUP_SEC_VIOLATION; break;
case LDAP_CUP_INVALID_DATA: ec = GPG_ERR_LDAP_CUP_INV_DATA; break;
case LDAP_CUP_UNSUPPORTED_SCHEME: ec = GPG_ERR_LDAP_CUP_UNSUP_SCHEME; break;
case LDAP_CUP_RELOAD_REQUIRED: ec = GPG_ERR_LDAP_CUP_RELOAD; break;
#endif
#ifdef LDAP_CANCELLED
case LDAP_CANCELLED: ec = GPG_ERR_LDAP_CANCELLED; break;
#endif
#ifdef LDAP_NO_SUCH_OPERATION
case LDAP_NO_SUCH_OPERATION: ec = GPG_ERR_LDAP_NO_SUCH_OPERATION; break;
#endif
#ifdef LDAP_TOO_LATE
case LDAP_TOO_LATE: ec = GPG_ERR_LDAP_TOO_LATE; break;
#endif
#ifdef LDAP_CANNOT_CANCEL
case LDAP_CANNOT_CANCEL: ec = GPG_ERR_LDAP_CANNOT_CANCEL; break;
#endif
#ifdef LDAP_ASSERTION_FAILED
case LDAP_ASSERTION_FAILED: ec = GPG_ERR_LDAP_ASSERTION_FAILED; break;
#endif
#ifdef LDAP_PROXIED_AUTHORIZATION_DENIED
case LDAP_PROXIED_AUTHORIZATION_DENIED:
ec = GPG_ERR_LDAP_PROX_AUTH_DENIED; break;
#endif
default:
#if defined(LDAP_E_ERROR) && defined(LDAP_X_ERROR)
if (LDAP_E_ERROR (code))
ec = GPG_ERR_LDAP_E_GENERAL;
else if (LDAP_X_ERROR (code))
ec = GPG_ERR_LDAP_X_GENERAL;
else
#endif
ec = GPG_ERR_LDAP_GENERAL;
break;
}
return ec;
}
/* Retrieve an LDAP error and return it's GPG equivalent. */
static int
ldap_to_gpg_err (LDAP *ld)
{
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_ERROR_NUMBER)
int err;
if (ldap_get_option (ld, LDAP_OPT_ERROR_NUMBER, &err) == 0)
return ldap_err_to_gpg_err (err);
else
return GPG_ERR_GENERAL;
#elif defined(HAVE_LDAP_LD_ERRNO)
return ldap_err_to_gpg_err (ld->ld_errno);
#else
/* We should never get here since the LDAP library should always
have either ldap_get_option or ld_errno, but just in case... */
return GPG_ERR_INTERNAL;
#endif
}
static time_t
ldap2epochtime (const char *timestr)
@ -1829,7 +1651,7 @@ uncescape (char *str)
&& hexdigitp (str + r + 3))
{
int x = hextobyte (&str[r + 2]);
assert (0 <= x && x <= 0xff);
log_assert (0 <= x && x <= 0xff);
str[w] = x;
@ -2202,8 +2024,8 @@ ks_ldap_put (ctrl_t ctrl, parsed_uri_t uri,
{
dump = es_fopen("/tmp/modlist.txt", "w");
if (! dump)
log_error ("Failed to open /tmp/modlist.txt: %s\n",
strerror (errno));
log_error ("failed to open /tmp/modlist.txt: %s\n",
gpg_strerror (gpg_error_from_syserror ()));
if (dump)
{

332
dirmngr/ldap-misc.c Normal file
View File

@ -0,0 +1,332 @@
/* ldap-misc.c - Miscellaneous helpers for LDAP functions
* Copyright (C) 2015, 2021 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include <config.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "dirmngr-err.h"
#include "../common/util.h"
#include "ldap-misc.h"
/* Convert an LDAP error to a GPG error. */
gpg_err_code_t
ldap_err_to_gpg_err (int code)
{
gpg_err_code_t ec;
switch (code)
{
#ifdef LDAP_X_CONNECTING
case LDAP_X_CONNECTING: ec = GPG_ERR_LDAP_X_CONNECTING; break;
#endif
case LDAP_REFERRAL_LIMIT_EXCEEDED: ec = GPG_ERR_LDAP_REFERRAL_LIMIT; break;
case LDAP_CLIENT_LOOP: ec = GPG_ERR_LDAP_CLIENT_LOOP; break;
case LDAP_NO_RESULTS_RETURNED: ec = GPG_ERR_LDAP_NO_RESULTS; break;
case LDAP_CONTROL_NOT_FOUND: ec = GPG_ERR_LDAP_CONTROL_NOT_FOUND; break;
case LDAP_NOT_SUPPORTED: ec = GPG_ERR_LDAP_NOT_SUPPORTED; break;
case LDAP_CONNECT_ERROR: ec = GPG_ERR_LDAP_CONNECT; break;
case LDAP_NO_MEMORY: ec = GPG_ERR_LDAP_NO_MEMORY; break;
case LDAP_PARAM_ERROR: ec = GPG_ERR_LDAP_PARAM; break;
case LDAP_USER_CANCELLED: ec = GPG_ERR_LDAP_USER_CANCELLED; break;
case LDAP_FILTER_ERROR: ec = GPG_ERR_LDAP_FILTER; break;
case LDAP_AUTH_UNKNOWN: ec = GPG_ERR_LDAP_AUTH_UNKNOWN; break;
case LDAP_TIMEOUT: ec = GPG_ERR_LDAP_TIMEOUT; break;
case LDAP_DECODING_ERROR: ec = GPG_ERR_LDAP_DECODING; break;
case LDAP_ENCODING_ERROR: ec = GPG_ERR_LDAP_ENCODING; break;
case LDAP_LOCAL_ERROR: ec = GPG_ERR_LDAP_LOCAL; break;
case LDAP_SERVER_DOWN: ec = GPG_ERR_LDAP_SERVER_DOWN; break;
case LDAP_SUCCESS: ec = GPG_ERR_LDAP_SUCCESS; break;
case LDAP_OPERATIONS_ERROR: ec = GPG_ERR_LDAP_OPERATIONS; break;
case LDAP_PROTOCOL_ERROR: ec = GPG_ERR_LDAP_PROTOCOL; break;
case LDAP_TIMELIMIT_EXCEEDED: ec = GPG_ERR_LDAP_TIMELIMIT; break;
case LDAP_SIZELIMIT_EXCEEDED: ec = GPG_ERR_LDAP_SIZELIMIT; break;
case LDAP_COMPARE_FALSE: ec = GPG_ERR_LDAP_COMPARE_FALSE; break;
case LDAP_COMPARE_TRUE: ec = GPG_ERR_LDAP_COMPARE_TRUE; break;
case LDAP_AUTH_METHOD_NOT_SUPPORTED: ec=GPG_ERR_LDAP_UNSUPPORTED_AUTH;break;
case LDAP_STRONG_AUTH_REQUIRED: ec = GPG_ERR_LDAP_STRONG_AUTH_RQRD; break;
case LDAP_PARTIAL_RESULTS: ec = GPG_ERR_LDAP_PARTIAL_RESULTS; break;
case LDAP_REFERRAL: ec = GPG_ERR_LDAP_REFERRAL; break;
#ifdef LDAP_ADMINLIMIT_EXCEEDED
case LDAP_ADMINLIMIT_EXCEEDED: ec = GPG_ERR_LDAP_ADMINLIMIT; break;
#endif
#ifdef LDAP_UNAVAILABLE_CRITICAL_EXTENSION
case LDAP_UNAVAILABLE_CRITICAL_EXTENSION:
ec = GPG_ERR_LDAP_UNAVAIL_CRIT_EXTN; break;
#endif
case LDAP_CONFIDENTIALITY_REQUIRED: ec = GPG_ERR_LDAP_CONFIDENT_RQRD; break;
case LDAP_SASL_BIND_IN_PROGRESS: ec = GPG_ERR_LDAP_SASL_BIND_INPROG; break;
case LDAP_NO_SUCH_ATTRIBUTE: ec = GPG_ERR_LDAP_NO_SUCH_ATTRIBUTE; break;
case LDAP_UNDEFINED_TYPE: ec = GPG_ERR_LDAP_UNDEFINED_TYPE; break;
case LDAP_INAPPROPRIATE_MATCHING: ec = GPG_ERR_LDAP_BAD_MATCHING; break;
case LDAP_CONSTRAINT_VIOLATION: ec = GPG_ERR_LDAP_CONST_VIOLATION; break;
#ifdef LDAP_TYPE_OR_VALUE_EXISTS
case LDAP_TYPE_OR_VALUE_EXISTS: ec = GPG_ERR_LDAP_TYPE_VALUE_EXISTS; break;
#endif
case LDAP_INVALID_SYNTAX: ec = GPG_ERR_LDAP_INV_SYNTAX; break;
case LDAP_NO_SUCH_OBJECT: ec = GPG_ERR_LDAP_NO_SUCH_OBJ; break;
case LDAP_ALIAS_PROBLEM: ec = GPG_ERR_LDAP_ALIAS_PROBLEM; break;
case LDAP_INVALID_DN_SYNTAX: ec = GPG_ERR_LDAP_INV_DN_SYNTAX; break;
case LDAP_IS_LEAF: ec = GPG_ERR_LDAP_IS_LEAF; break;
case LDAP_ALIAS_DEREF_PROBLEM: ec = GPG_ERR_LDAP_ALIAS_DEREF; break;
#ifdef LDAP_X_PROXY_AUTHZ_FAILURE
case LDAP_X_PROXY_AUTHZ_FAILURE: ec = GPG_ERR_LDAP_X_PROXY_AUTH_FAIL; break;
#endif
case LDAP_INAPPROPRIATE_AUTH: ec = GPG_ERR_LDAP_BAD_AUTH; break;
case LDAP_INVALID_CREDENTIALS: ec = GPG_ERR_LDAP_INV_CREDENTIALS; break;
#ifdef LDAP_INSUFFICIENT_ACCESS
case LDAP_INSUFFICIENT_ACCESS: ec = GPG_ERR_LDAP_INSUFFICIENT_ACC; break;
#endif
case LDAP_BUSY: ec = GPG_ERR_LDAP_BUSY; break;
case LDAP_UNAVAILABLE: ec = GPG_ERR_LDAP_UNAVAILABLE; break;
case LDAP_UNWILLING_TO_PERFORM: ec = GPG_ERR_LDAP_UNWILL_TO_PERFORM; break;
case LDAP_LOOP_DETECT: ec = GPG_ERR_LDAP_LOOP_DETECT; break;
case LDAP_NAMING_VIOLATION: ec = GPG_ERR_LDAP_NAMING_VIOLATION; break;
case LDAP_OBJECT_CLASS_VIOLATION: ec = GPG_ERR_LDAP_OBJ_CLS_VIOLATION; break;
case LDAP_NOT_ALLOWED_ON_NONLEAF: ec=GPG_ERR_LDAP_NOT_ALLOW_NONLEAF;break;
case LDAP_NOT_ALLOWED_ON_RDN: ec = GPG_ERR_LDAP_NOT_ALLOW_ON_RDN; break;
case LDAP_ALREADY_EXISTS: ec = GPG_ERR_LDAP_ALREADY_EXISTS; break;
case LDAP_NO_OBJECT_CLASS_MODS: ec = GPG_ERR_LDAP_NO_OBJ_CLASS_MODS; break;
case LDAP_RESULTS_TOO_LARGE: ec = GPG_ERR_LDAP_RESULTS_TOO_LARGE; break;
case LDAP_AFFECTS_MULTIPLE_DSAS: ec = GPG_ERR_LDAP_AFFECTS_MULT_DSAS; break;
#ifdef LDAP_VLV_ERROR
case LDAP_VLV_ERROR: ec = GPG_ERR_LDAP_VLV; break;
#endif
case LDAP_OTHER: ec = GPG_ERR_LDAP_OTHER; break;
#ifdef LDAP_CUP_RESOURCES_EXHAUSTED
case LDAP_CUP_RESOURCES_EXHAUSTED: ec=GPG_ERR_LDAP_CUP_RESOURCE_LIMIT;break;
case LDAP_CUP_SECURITY_VIOLATION: ec=GPG_ERR_LDAP_CUP_SEC_VIOLATION; break;
case LDAP_CUP_INVALID_DATA: ec = GPG_ERR_LDAP_CUP_INV_DATA; break;
case LDAP_CUP_UNSUPPORTED_SCHEME: ec = GPG_ERR_LDAP_CUP_UNSUP_SCHEME; break;
case LDAP_CUP_RELOAD_REQUIRED: ec = GPG_ERR_LDAP_CUP_RELOAD; break;
#endif
#ifdef LDAP_CANCELLED
case LDAP_CANCELLED: ec = GPG_ERR_LDAP_CANCELLED; break;
#endif
#ifdef LDAP_NO_SUCH_OPERATION
case LDAP_NO_SUCH_OPERATION: ec = GPG_ERR_LDAP_NO_SUCH_OPERATION; break;
#endif
#ifdef LDAP_TOO_LATE
case LDAP_TOO_LATE: ec = GPG_ERR_LDAP_TOO_LATE; break;
#endif
#ifdef LDAP_CANNOT_CANCEL
case LDAP_CANNOT_CANCEL: ec = GPG_ERR_LDAP_CANNOT_CANCEL; break;
#endif
#ifdef LDAP_ASSERTION_FAILED
case LDAP_ASSERTION_FAILED: ec = GPG_ERR_LDAP_ASSERTION_FAILED; break;
#endif
#ifdef LDAP_PROXIED_AUTHORIZATION_DENIED
case LDAP_PROXIED_AUTHORIZATION_DENIED:
ec = GPG_ERR_LDAP_PROX_AUTH_DENIED; break;
#endif
default:
#if defined(LDAP_E_ERROR) && defined(LDAP_X_ERROR)
if (LDAP_E_ERROR (code))
ec = GPG_ERR_LDAP_E_GENERAL;
else if (LDAP_X_ERROR (code))
ec = GPG_ERR_LDAP_X_GENERAL;
else
#endif
ec = GPG_ERR_LDAP_GENERAL;
break;
}
return ec;
}
/* Retrieve an LDAP error and return it's GPG equivalent. */
gpg_err_code_t
ldap_to_gpg_err (LDAP *ld)
{
#if defined(HAVE_LDAP_GET_OPTION) && defined(LDAP_OPT_ERROR_NUMBER)
int err;
if (ldap_get_option (ld, LDAP_OPT_ERROR_NUMBER, &err) == 0)
return ldap_err_to_gpg_err (err);
else
return GPG_ERR_GENERAL;
#elif defined(HAVE_LDAP_LD_ERRNO)
return ldap_err_to_gpg_err (ld->ld_errno);
#else
/* We should never get here since the LDAP library should always
have either ldap_get_option or ld_errno, but just in case... */
return GPG_ERR_INTERNAL;
#endif
}
/* Parse an extended filter syntax as used by dirmngr_ldap.c
* For example:
*
* ^CN=foo, OU=My Users&(objectClasses=*)
*
* Uses "CN=foo, OU=My Users" as base DN and "(objectClasses=*)" as
* filter. If the base prefix includes an ampersand, it needs to be
* doubled. The usual escaping rules for DNs (for the base) and
* filters apply. Other examples:
*
* ^CN=foo, OU=My Users&
*
* Use just the base DN.
*
* ^CN=foo, OU=My Users&SCOPE&
*
* Specify the scope which is "base", "one", or "sub". May of course
* also be followed by a filter.
*
* ^&SCOPE&(objectClasses=*)
*
* Give a scope and a filter. Note that R_SCOPE is only changed if a
* STRING has scope parameter. Setting this initally to -1 allows to
* detect this case.
*/
gpg_error_t
ldap_parse_extfilter (const char *string, int silent,
char **r_base, int *r_scope, char **r_filter)
{
gpg_error_t err = 0;
char *base = NULL;
char *filter = NULL;
const char *s;
char *p;
if (r_base)
*r_base = NULL;
if (r_filter)
*r_filter = NULL;
if (*string == '^')
{
string++;
base = xtrymalloc (strlen (string)+1);
if (!base)
{
err = gpg_error_from_syserror ();
goto leave;
}
for (s=string, p=base; *s; s++)
{
*p++ = *s;
if (*s == '&' && s[1] == '&')
s++; /* Skip quoted ampersand. */
else if (*s == '&')
{
p--;
break;
}
}
*p = 0;
if (!*s)
{
if (!silent)
log_info ("LDAP extended filter is not terminated\n");
err = gpg_error (GPG_ERR_SYNTAX);
goto leave;
}
string = s + 1;
}
if (!*string)
goto leave; /* ready. */
if (!strncmp (string, "base&", 5))
{
string += 5;
if (r_scope)
*r_scope = LDAP_SCOPE_BASE;
}
else if (!strncmp (string, "one&", 4))
{
string += 4;
if (r_scope)
*r_scope = LDAP_SCOPE_ONELEVEL;
}
else if (!strncmp (string, "sub&", 4))
{
string += 4;
if (r_scope)
*r_scope = LDAP_SCOPE_SUBTREE;
}
if (!*string)
goto leave; /* ready. */
if (*string != '(')
{
if (!silent)
log_info ("LDAP filter does not start with a left parentheses\n");
return gpg_error (GPG_ERR_SYNTAX);
}
if (string[strlen(string)-1] != ')')
{
if (!silent)
log_info ("LDAP filter does not end with a right parentheses\n");
return gpg_error (GPG_ERR_SYNTAX);
}
filter = xtrystrdup (string);
if (!filter)
err = gpg_error_from_syserror ();
leave:
if (err)
{
xfree (base);
xfree (filter);
}
else
{
if (r_base)
*r_base = base;
else
xfree (base);
if (r_filter)
*r_filter = filter;
else
xfree (filter);
}
return err;
}

43
dirmngr/ldap-misc.h Normal file
View File

@ -0,0 +1,43 @@
/* ldap-misc.h - Miscellaneous helpers for LDAP functions
* Copyright (C) 2015, 2021 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#ifndef DIRMNGR_LDAP_MISC_H
#define DIRMNGR_LDAP_MISC_H
#ifdef _WIN32
# include <winsock2.h>
# include <winldap.h>
#else
# ifdef NEED_LBER_H
# include <lber.h>
# endif
/* For OpenLDAP, to enable the API that we're using. */
# define LDAP_DEPRECATED 1
# include <ldap.h>
#endif
gpg_err_code_t ldap_err_to_gpg_err (int code);
gpg_err_code_t ldap_to_gpg_err (LDAP *ld);
gpg_error_t ldap_parse_extfilter (const char *string, int silent,
char **r_base, int *r_scope, char **r_filter);
#endif /*DIRMNGR_LDAP_MISC_H*/

14
dirmngr/ldap-wrapper.c
View File

@ -548,7 +548,7 @@ ldap_reaper_launch_thread (void)
#ifdef HAVE_W32_SYSTEM
/* Static init does not yet work in W32 nPth. */
if (npth_cond_init (&reaper_run_cond, NULL))
log_fatal ("%s: failed to init condition variabale: %s\n",
log_fatal ("%s: failed to init condition variable: %s\n",
__func__, gpg_strerror (gpg_error_from_syserror ()));
#endif
@ -857,9 +857,9 @@ ldap_wrapper (ctrl_t ctrl, ksba_reader_t *reader, const char *argv[])
err = gnupg_spawn_process (pgmname, arg_list,
NULL, NULL, GNUPG_SPAWN_NONBLOCK,
NULL, &outfp, &errfp, &pid);
xfree (arg_list);
if (err)
{
xfree (arg_list);
xfree (ctx);
log_error ("error running '%s': %s\n", pgmname, gpg_strerror (err));
return err;
@ -878,6 +878,7 @@ ldap_wrapper (ctrl_t ctrl, ksba_reader_t *reader, const char *argv[])
err = ksba_reader_set_cb (*reader, reader_callback, ctx);
if (err)
{
xfree (arg_list);
log_error (_("error initializing reader object: %s\n"),
gpg_strerror (err));
destroy_wrapper (ctx);
@ -899,8 +900,15 @@ ldap_wrapper (ctrl_t ctrl, ksba_reader_t *reader, const char *argv[])
unlock_reaper_list ();
if (DBG_EXTPROG)
log_debug ("ldap wrapper %d started (%p, %s)\n",
{
log_debug ("ldap wrapper %d started (%p, %s)",
(int)ctx->pid, ctx->reader, pgmname);
for (i=0; arg_list[i]; i++)
log_printf (" [%s]", arg_list[i]);
log_printf ("\n");
}
xfree (arg_list);
/* Need to wait for the first byte so we are able to detect an empty
output and not let the consumer see an EOF without further error

522
dirmngr/ldap.c
View File

@ -1,12 +1,12 @@
/* ldap.c - LDAP access
* Copyright (C) 2002 Klarälvdalens Datakonsult AB
* Copyright (C) 2003, 2004, 2005, 2007, 2008, 2010 g10 Code GmbH
* Copyright (C) 2003, 2004, 2005, 2007, 2008, 2010, 2021 g10 Code GmbH
*
* This file is part of DirMngr.
* This file is part of GnuPG.
*
* DirMngr is free software; you can redistribute it and/or modify
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DirMngr is distributed in the hope that it will be useful,
@ -15,8 +15,8 @@
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
* along with this program; if not, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include <config.h>
@ -36,6 +36,7 @@
#include "ldapserver.h"
#include "misc.h"
#include "ldap-wrapper.h"
#include "ldap-url.h"
#include "../common/host2net.h"
@ -116,14 +117,15 @@ static gpg_error_t
run_ldap_wrapper (ctrl_t ctrl,
int ignore_timeout,
int multi_mode,
int tls_mode,
int ntds,
const char *proxy,
const char *host, int port,
const char *user, const char *pass,
const char *dn, const char *filter, const char *attr,
const char *url,
const char *base, const char *filter, const char *attr,
ksba_reader_t *reader)
{
const char *argv[40];
const char *argv[50];
int argc;
char portbuf[30], timeoutbuf[30];
@ -131,7 +133,7 @@ run_ldap_wrapper (ctrl_t ctrl,
*reader = NULL;
argc = 0;
if (pass) /* Note, that the password must be the first item. */
if (pass && *pass) /* Note, that the password must be the first item. */
{
argv[argc++] = "--pass";
argv[argc++] = pass;
@ -145,9 +147,18 @@ run_ldap_wrapper (ctrl_t ctrl,
argv[argc++] = "--log-with-pid";
if (multi_mode)
argv[argc++] = "--multi";
if (tls_mode == 1)
argv[argc++] = "--starttls";
else if (tls_mode)
argv[argc++] = "--ldaptls";
if (ntds)
argv[argc++] = "--ntds";
if (opt.ldaptimeout)
{
sprintf (timeoutbuf, "%u", opt.ldaptimeout);
snprintf (timeoutbuf, sizeof timeoutbuf, "%u", opt.ldaptimeout);
argv[argc++] = "--timeout";
argv[argc++] = timeoutbuf;
if (ignore_timeout)
@ -158,7 +169,7 @@ run_ldap_wrapper (ctrl_t ctrl,
argv[argc++] = "--proxy";
argv[argc++] = proxy;
}
if (host)
if (host && *host)
{
argv[argc++] = "--host";
argv[argc++] = host;
@ -169,27 +180,24 @@ run_ldap_wrapper (ctrl_t ctrl,
argv[argc++] = "--port";
argv[argc++] = portbuf;
}
if (user)
if (user && *user)
{
argv[argc++] = "--user";
argv[argc++] = user;
}
if (dn)
if (base && *base)
{
argv[argc++] = "--dn";
argv[argc++] = dn;
}
if (filter)
{
argv[argc++] = "--filter";
argv[argc++] = filter;
argv[argc++] = "--base";
argv[argc++] = base;
}
if (attr)
{
argv[argc++] = "--attr";
argv[argc++] = attr;
}
argv[argc++] = url? url : "ldap://";
if (filter)
argv[argc++] = filter;
argv[argc] = NULL;
return ldap_wrapper (ctrl, reader, argv);
@ -202,19 +210,48 @@ run_ldap_wrapper (ctrl_t ctrl,
reader is returned. If HOST or PORT are not 0, they are used to
override the values from the URL. */
gpg_error_t
url_fetch_ldap (ctrl_t ctrl, const char *url, const char *host, int port,
ksba_reader_t *reader)
url_fetch_ldap (ctrl_t ctrl, const char *url, ksba_reader_t *reader)
{
gpg_error_t err;
LDAPURLDesc *ludp = NULL;
int tls_mode;
if (!ldap_is_ldap_url (url))
{
log_error (_("'%s' is not an LDAP URL\n"), url);
return gpg_error (GPG_ERR_INV_URI);
}
if (ldap_url_parse (url, &ludp))
{
log_error (_("'%s' is an invalid LDAP URL\n"), url);
return gpg_error (GPG_ERR_INV_URI);
}
if (ludp->lud_filter && ludp->lud_filter[0] != '(')
{
log_error (_("'%s' is an invalid LDAP URL\n"), url);
err = gpg_error (GPG_ERR_BAD_URI);
goto leave;
}
if (ludp->lud_scheme && !strcmp (ludp->lud_scheme, "ldaps"))
tls_mode = 2; /* LDAP-over-TLS here becuase we get it from certs. */
else
tls_mode = 0;
err = run_ldap_wrapper (ctrl,
1, /* Ignore explicit timeout because CRLs
might be very large. */
0,
0, /* No Multi-mode. */
tls_mode,
0, /* No AD authentication. */
opt.ldap_proxy,
host, port,
NULL, NULL,
NULL, NULL, NULL, url,
ludp->lud_host, ludp->lud_port,
NULL, NULL, /* user, password */
ludp->lud_dn, /* Base DN */
ludp->lud_filter,
ludp->lud_attrs? ludp->lud_attrs[0] : NULL,
reader);
/* FIXME: This option might be used for DoS attacks. Because it
@ -223,17 +260,8 @@ url_fetch_ldap (ctrl_t ctrl, const char *url, const char *host, int port,
turn. */
if (!err && opt.add_new_ldapservers && !opt.ldap_proxy)
{
if (host)
add_server_to_servers (host, port);
else if (url)
{
char *tmp = host_and_port_from_url (url, &port);
if (tmp)
{
add_server_to_servers (tmp, port);
xfree (tmp);
}
}
if (ludp->lud_host)
add_server_to_servers (ludp->lud_host, ludp->lud_port);
}
/* If the lookup failed and we are not only using the proxy, we try
@ -252,19 +280,32 @@ url_fetch_ldap (ctrl_t ctrl, const char *url, const char *host, int port,
{
ldap_server_t server = iter.server;
if (server->starttls)
tls_mode = 1;
else if (server->ldap_over_tls)
tls_mode = 2;
else
tls_mode = 0;
err = run_ldap_wrapper (ctrl,
0,
0,
0, /* No Multi-mode */
tls_mode,
server->ntds,
NULL,
server->host, server->port,
NULL, NULL,
NULL, NULL, NULL, url,
server->user, server->pass,
server->base,
ludp->lud_filter,
ludp->lud_attrs? ludp->lud_attrs[0] : NULL,
reader);
if (!err)
break;
}
}
leave:
ldap_free_urldesc (ludp);
return err;
}
@ -281,20 +322,32 @@ attr_fetch_ldap (ctrl_t ctrl,
*reader = NULL;
/* FIXME; we might want to look at the Base SN to try matching
/* FIXME; we might want to look at the Base DN to try matching
servers first. */
for (ldapserver_iter_begin (&iter, ctrl); ! ldapserver_iter_end_p (&iter);
ldapserver_iter_next (&iter))
{
ldap_server_t server = iter.server;
int tls_mode;
if (server->starttls)
tls_mode = 1;
else if (server->ldap_over_tls)
tls_mode = 2;
else
tls_mode = 0;
err = run_ldap_wrapper (ctrl,
0,
0,
tls_mode,
server->ntds,
opt.ldap_proxy,
server->host, server->port,
server->user, server->pass,
dn, "objectClass=*", attr, NULL,
dn,
"(objectClass=*)",
attr,
reader);
if (!err)
break; /* Probably found a result. Ready. */
@ -302,46 +355,144 @@ attr_fetch_ldap (ctrl_t ctrl,
return err;
}
/* Parse PATTERN and return a new strlist to be used for the actual
LDAP query. Bit 0 of the flags field is set if that pattern is
actually a base specification. Caller must release the returned
strlist. NULL is returned on error.
* Possible patterns:
*
* KeyID
* Fingerprint
* OpenPGP userid
* x Email address Indicated by a left angle bracket.
* Exact word match in user id or subj. name
* x Subj. DN indicated bu a leading slash
* Issuer DN
* Serial number + subj. DN
* x Substring match indicated by a leading '*; is also the default.
*/
strlist_t
parse_one_pattern (const char *pattern)
/* Return true if VALUE needs escaping. */
static int
rfc2254_need_escape (const char *value)
{
strlist_t result = NULL;
char *p;
/* NUL needs to be escaped as well but we can represent that in
* VALUE, so no need for it. */
return !!strpbrk (value, "*()\\");
}
/* Escape VALUE using RFC-2254 rules. Returns NULL on error. */
static char *
rfc2254_escape (const char *value)
{
const char *s;
char *buffer, *p;
size_t length = 0;
for (s=value; *s; s++)
switch (*s)
{
case '*':
case '(':
case ')':
case '\\': length += 3; break;
default: length++; break;
}
buffer = xtrymalloc (length+1);
if (!buffer)
return NULL;
p = buffer;
for (s=value; *s; s++)
switch (*s)
{
case '*': p = stpcpy (p, "\\2a"); break;
case '(': p = stpcpy (p, "\\28"); break;
case ')': p = stpcpy (p, "\\29"); break;
case '\\': p = stpcpy (p, "\\5c"); break;
default: *p++ = *s; break;
}
*p = 0;
return buffer;
}
/* Return true if VALUE needs escaping. */
static int
extfilt_need_escape (const char *value)
{
/* NUL needs to be escaped as well but we can represent that in
* VALUE, so no need for it. */
return !!strchr (value, '&');
}
/* Escape VALUE using our extended filter rules from dirmngr_ldap.c.
* Returns NULL on error. */
static char *
extfilt_escape (const char *value)
{
const char *s;
char *buffer, *p;
size_t length = 0;
for (s=value; *s; s++)
{
length++;
if (*s == '&')
length++;
}
buffer = xtrymalloc (length+1);
if (!buffer)
return NULL;
p = buffer;
for (s=value; *s; s++)
{
*p++ = *s;
if (*s == '&')
*p++ = '&';
}
*p = 0;
return buffer;
}
/* Parse PATTERN and return a new filter expression for an LDAP query.
* The extended filter syntax as known by dirmngr_ldap.c is used.
* Caller must release the returned value. R_RESULT is set to NULL on
* error.
*
* Supported patterns:
*
* | Ok | gpg style user id type |
* |-----+------------------------------------------------------|
* | no | KeyID |
* | no | Fingerprint |
* | no | OpenPGP userid |
* | yes | Email address Indicated by a left angle bracket. |
* | no | Exact word match in user id or subj. name |
* | yes | Subj. DN indicated by a leading slash |
* | no | Issuer DN |
* | no | Serial number + subj. DN |
* | yes | Substring match indicated by a leading '*; (default) |
*/
static gpg_error_t
make_one_filter (const char *pattern, char **r_result)
{
gpg_error_t err = 0;
char *pattern_buffer = NULL;
char *result = NULL;
size_t n;
*r_result = NULL;
switch (*pattern)
{
case '<': /* Email. */
{
pattern++;
result = xmalloc (sizeof *result + 5 + strlen (pattern));
result->next = NULL;
result->flags = 0;
p = stpcpy (stpcpy (result->d, "mail="), pattern);
if (p[-1] == '>')
*--p = 0;
if (!*result->d) /* Error. */
if (rfc2254_need_escape (pattern)
&& !(pattern = pattern_buffer = rfc2254_escape (pattern)))
{
xfree (result);
result = NULL;
err = gpg_error_from_syserror ();
goto leave;
}
result = strconcat ("(mail=", pattern, ")", NULL);
if (!result)
{
err = gpg_error_from_syserror ();
goto leave;
}
n = strlen (result);
if (result[n-2] == '>') /* Strip trailing '>' */
{
result[n-2] = ')';
result[n-1] = 0;
}
break;
}
@ -349,123 +500,84 @@ parse_one_pattern (const char *pattern)
pattern++;
if (*pattern)
{
result = xmalloc (sizeof *result + strlen (pattern));
result->next = NULL;
result->flags = 1; /* Base spec. */
strcpy (result->d, pattern);
/* We need just the BaseDN. This assumes that the Subject
* is correcly stored in the DT. This is however not always
* the case and the actual DN is different ffrom the
* subject. In this case we won't find anything. */
if (extfilt_need_escape (pattern)
&& !(pattern = pattern_buffer = extfilt_escape (pattern)))
{
err = gpg_error_from_syserror ();
goto leave;
}
result = strconcat ("^", pattern, "&base&", NULL);
if (!result)
{
err = gpg_error_from_syserror ();
goto leave;
}
}
break;
case '#': /* Issuer DN. */
case '#': /* Issuer DN - Not yet working. */
pattern++;
if (*pattern == '/') /* Just issuer DN. */
{
pattern++;
if (extfilt_need_escape (pattern)
&& !(pattern = pattern_buffer = extfilt_escape (pattern)))
{
err = gpg_error_from_syserror ();
goto leave;
}
result = strconcat ("^", pattern, "&base&", NULL);
if (!result)
{
err = gpg_error_from_syserror ();
goto leave;
}
}
else /* Serial number + issuer DN */
{
}
break;
case '*':
pattern++;
/* fall through */
default: /* Take as substring match. */
{
const char format[] = "(|(sn=*%s*)(|(cn=*%s*)(mail=*%s*)))";
if (*pattern)
{
result = xmalloc (sizeof *result
+ strlen (format) + 3 * strlen (pattern));
result->next = NULL;
result->flags = 0;
sprintf (result->d, format, pattern, pattern, pattern);
if (rfc2254_need_escape (pattern)
&& !(pattern = pattern_buffer = rfc2254_escape (pattern)))
{
err = gpg_error_from_syserror ();
goto leave;
}
result = strconcat ("(|(sn=*", pattern,
"*)(|(cn=*", pattern,
"*)(mail=*", pattern,
"*)))", NULL);
if (!result)
{
err = gpg_error_from_syserror ();
goto leave;
}
}
break;
}
return result;
}
if (!result)
err = gpg_error (GPG_ERR_INV_USER_ID);
/* Take the string STRING and escape it according to the URL rules.
Return a newly allocated string. */
static char *
escape4url (const char *string)
{
const char *s;
char *buf, *p;
size_t n;
if (!string)
string = "";
for (s=string,n=0; *s; s++)
if (strchr (UNENCODED_URL_CHARS, *s))
n++;
leave:
xfree (pattern_buffer);
if (err)
xfree (result);
else
n += 3;
buf = malloc (n+1);
if (!buf)
return NULL;
for (s=string,p=buf; *s; s++)
if (strchr (UNENCODED_URL_CHARS, *s))
*p++ = *s;
else
{
sprintf (p, "%%%02X", *(const unsigned char *)s);
p += 3;
}
*p = 0;
return buf;
}
/* Create a LDAP URL from DN and FILTER and return it in URL. We don't
need the host and port because this will be specified using the
override options. */
static gpg_error_t
make_url (char **url, const char *dn, const char *filter)
{
gpg_error_t err;
char *u_dn, *u_filter;
char const attrs[] = (USERCERTIFICATE ","
/* In 2005 wk mentioned in the changelog that
* work on the userSMIMECertificate has
* started but it seems that no further
* progress was made or the whole thing was
* simply forgotten. */
/* USERSMIMECERTIFICATE "," */
CACERTIFICATE ","
X509CACERT );
*url = NULL;
u_dn = escape4url (dn);
if (!u_dn)
return gpg_error_from_errno (errno);
u_filter = escape4url (filter);
if (!u_filter)
{
err = gpg_error_from_errno (errno);
xfree (u_dn);
*r_result = result;
return err;
}
*url = strconcat ("ldap:///", u_dn, "?", attrs, "?sub?", u_filter, NULL);
if (!*url)
err = gpg_error_from_syserror ();
else
err = 0;
xfree (u_dn);
xfree (u_filter);
return err;
}
/* Prepare an LDAP query to return the cACertificate attribute for DN.
@ -483,7 +595,7 @@ start_cacert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
if (!*r_context)
return gpg_error_from_errno (errno);
/* FIXME; we might want to look at the Base SN to try matching
/* FIXME; we might want to look at the Base DN to try matching
servers first. */
err = gpg_error (GPG_ERR_CONFIGURATION);
@ -495,10 +607,12 @@ start_cacert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
err = run_ldap_wrapper (ctrl,
0,
1, /* --multi (record format) */
0, /* No TLS */
0, /* No AD authentication. */
opt.ldap_proxy,
server->host, server->port,
server->user, server->pass,
dn, "objectClass=*", "cACertificate", NULL,
dn, "objectClass=*", "cACertificate",
&(*r_context)->reader);
if (!err)
break; /* Probably found a result. */
@ -526,12 +640,12 @@ start_cert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
int port;
char *user = NULL;
char *pass = NULL;
const char *base;
char *base = NULL;
char *argv[50];
int argc = 0;
int argc_malloced = 0;
char portbuf[30], timeoutbuf[30];
int use_ldaps = 0;
int starttls, ldaptls, ntds;
*r_context = NULL;
@ -559,19 +673,24 @@ start_cert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
err = gpg_error_from_syserror ();
goto leave;
}
base = server->base;
use_ldaps = server->ldap_over_tls;
if (server->base && !(base = xtrystrdup (server->base)))
{
err = gpg_error_from_syserror ();
goto leave;
}
starttls = server->starttls;
ldaptls = server->ldap_over_tls;
ntds = server->ntds;
}
else /* Use a default server. */
{
xfree (proxy);
return gpg_error (GPG_ERR_NOT_IMPLEMENTED);
err = gpg_error (GPG_ERR_NOT_IMPLEMENTED);
goto leave;
}
if (!base)
base = "";
if (pass) /* Note: Must be the first item. */
if (pass && *pass) /* Note: Must be the first item. */
{
argv[argc++] = "--pass";
argv[argc++] = pass;
@ -584,20 +703,27 @@ start_cert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
argv[argc++] = "--log-with-pid";
argv[argc++] = "--multi";
if (starttls)
argv[argc++] = "--starttls";
else if (ldaptls)
argv[argc++] = "--ldaptls";
if (ntds)
argv[argc++] = "--ntds";
if (opt.ldaptimeout)
{
snprintf (timeoutbuf, sizeof timeoutbuf, "%u", opt.ldaptimeout);
argv[argc++] = "--timeout";
argv[argc++] = timeoutbuf;
}
if (opt.ldap_proxy)
if (proxy && *proxy)
{
argv[argc++] = "--proxy";
argv[argc++] = proxy;
}
if (use_ldaps)
argv[argc++] = "--tls";
if (host)
if (host && *host)
{
argv[argc++] = "--host";
argv[argc++] = host;
@ -608,56 +734,49 @@ start_cert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
argv[argc++] = "--port";
argv[argc++] = portbuf;
}
if (user)
if (user && *user)
{
argv[argc++] = "--user";
argv[argc++] = user;
}
if (base && *base)
{
argv[argc++] = "--base";
argv[argc++] = base;
}
/* All entries in argv from this index on are malloc'ed. */
argc_malloced = argc;
for (; patterns; patterns = patterns->next)
{
strlist_t sl;
char *url;
if (argc >= DIM (argv) - 1)
{
/* Too many patterns. It does not make sense to allow an
arbitrary number of patters because the length of the
command line is limited anyway. */
/* fixme: cleanup. */
return gpg_error (GPG_ERR_RESOURCE_LIMIT);
}
sl = parse_one_pattern (patterns->d);
if (!sl)
{
log_error (_("start_cert_fetch: invalid pattern '%s'\n"),
patterns->d);
err = gpg_error (GPG_ERR_INV_USER_ID);
err = gpg_error (GPG_ERR_RESOURCE_LIMIT);
goto leave;
}
if ((sl->flags & 1))
err = make_url (&url, sl->d, "objectClass=*");
else
err = make_url (&url, base, sl->d);
free_strlist (sl);
if (*patterns->d)
{
err = make_one_filter (patterns->d, &argv[argc]);
if (err)
goto leave;
argv[argc++] = url;
argc++;
}
}
argv[argc] = NULL;
*r_context = xtrycalloc (1, sizeof **r_context);
if (!*r_context)
{
err = gpg_error_from_errno (errno);
err = gpg_error_from_syserror ();
goto leave;
}
err = ldap_wrapper (ctrl, &(*r_context)->reader, (const char**)argv);
if (err)
{
xfree (*r_context);
@ -669,6 +788,7 @@ start_cert_fetch_ldap (ctrl_t ctrl, cert_fetch_context_t *r_context,
xfree (argv[argc_malloced]);
xfree (proxy);
xfree (host);
xfree (base);
xfree (user);
xfree (pass);
return err;

3
dirmngr/server.c
View File

@ -1672,7 +1672,8 @@ lookup_cert_by_pattern (assuan_context_t ctx, char *line,
if (!err && single)
goto ready;
if (gpg_err_code (err) == GPG_ERR_NO_DATA)
if (gpg_err_code (err) == GPG_ERR_NO_DATA
|| gpg_err_code (err) == GPG_ERR_NOT_FOUND)
{
err = 0;
if (cache_only)

158
dirmngr/t-ldap-misc.c Normal file
View File

@ -0,0 +1,158 @@
/* t-ldap-parse-uri.c - Tests for ldap-parse-uri.c and ldap-misc.c
* Copyright (C) 2015 g10 Code GmbH
*
* This file is part of GnuPG.
*
* GnuPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* GnuPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <gpg-error.h>
#include "../common/util.h"
#include "t-support.h"
#include "ldap-misc.h"
static void
test_ldap_parse_extfilter (void)
{
struct {
const char *string;
const char *base;
const char *filter;
int scope;
gpg_err_code_t ec;
} tests[] =
{
{ "^CN=foo, OU=My Users&(objectClasses=*)",
"CN=foo, OU=My Users", "(objectClasses=*)",
-1 },
{ "^CN=foo, OU=My Users&base&(objectClasses=*)",
"CN=foo, OU=My Users", "(objectClasses=*)",
LDAP_SCOPE_BASE },
{ "^CN=foo, OU=My Users&one&(objectClasses=*)",
"CN=foo, OU=My Users", "(objectClasses=*)",
LDAP_SCOPE_ONELEVEL },
{ "^CN=foo, OU=My Users&sub&(objectClasses=*)",
"CN=foo, OU=My Users", "(objectClasses=*)",
LDAP_SCOPE_SUBTREE },
/* { "^CN=foo, OU=My Users&children&(objectClasses=*)", */
/* "CN=foo, OU=My Users", "(objectClasses=*)", */
/* LDAP_SCOPE_CHILDREN }, */
{ "^CN=foo, OU=My Users&",
"CN=foo, OU=My Users", NULL,
-1 },
{ "^CN=foo, OU=My Users&sub&",
"CN=foo, OU=My Users", NULL,
LDAP_SCOPE_SUBTREE },
/* { "^&children&(objectClasses=*)", */
/* "", "(objectClasses=*)", */
/* LDAP_SCOPE_CHILDREN }, */
{ "^CN=foo, OU=My &&Users&base&(objectClasses=*)",
"CN=foo, OU=My &Users", "(objectClasses=*)",
LDAP_SCOPE_BASE },
{ "^CN=foo, OU=My Users&&&base&(objectClasses=*)",
"CN=foo, OU=My Users&", "(objectClasses=*)",
LDAP_SCOPE_BASE },
{ "^CN=foo, OU=My Users",
NULL, NULL,
LDAP_SCOPE_BASE, GPG_ERR_SYNTAX },
{ "^CN=foo, OU=My Users&base(objectClasses=*)",
NULL, NULL,
LDAP_SCOPE_BASE, GPG_ERR_SYNTAX },
{ "^CN=foo, OU=My Users&base&objectClasses=*)",
NULL, NULL,
LDAP_SCOPE_BASE, GPG_ERR_SYNTAX },
{ "^CN=foo, OU=My Users&base&(objectClasses=*",
NULL, NULL,
LDAP_SCOPE_BASE, GPG_ERR_SYNTAX }
};
int idx;
gpg_error_t err;
int errcount = 0;
char *base, *filter;
int scope;
for (idx= 0; idx < DIM (tests); idx++)
{
scope = -1;
err = ldap_parse_extfilter (tests[idx].string, 1, &base, &scope, &filter);
if (err && tests[idx].ec)
{
if (gpg_err_code (err) != tests[idx].ec)
{
fprintf (stderr, "%s: test %d failed: wrong error code %d\n",
__func__, idx, err);
errcount++;
}
continue;
}
if (err)
{
fprintf (stderr, "%s: test %d failed: %s\n",
__func__, idx, gpg_strerror (err));
errcount++;
continue;
}
if (tests[idx].ec)
{
fprintf (stderr, "%s: test %d failed: error not detected\n",
__func__, idx);
errcount++;
continue;
}
if ((!tests[idx].base ^ !base)
|| (tests[idx].base && strcmp (tests[idx].base, base)))
{
fprintf (stderr, "%s: test %d failed: base mismatch ('%s')\n",
__func__, idx, base? base : "(null");
errcount++;
}
if ((!tests[idx].filter ^ !filter)
|| (tests[idx].filter && strcmp (tests[idx].filter, filter)))
{
fprintf (stderr, "%s: test %d failed: filter mismatch ('%s')\n",
__func__, idx, filter? filter : "(null");
errcount++;
}
if (tests[idx].scope != scope)
{
fprintf (stderr, "%s: test %d failed: scope mismatch (%d)\n",
__func__, idx, scope);
errcount++;
}
xfree (base);
xfree (filter);
}
if (errcount)
exit (1);
}
int
main (int argc, char **argv)
{
(void)argc;
(void)argv;
test_ldap_parse_extfilter ();
return 0;
}

6
dirmngr/t-support.h
View File

@ -31,6 +31,12 @@
#ifndef DIRMNGR_T_SUPPORT_H
#define DIRMNGR_T_SUPPORT_H 1
#ifndef DIM
# define DIM(v) (sizeof(v)/sizeof((v)[0]))
# define DIMof(type,member) DIM(((type *)0)->member)
#endif
/* Macros to print the result of a test. */
#define pass() do { ; } while(0)
#define fail(a) do { fprintf (stderr, "%s:%d: test %d failed\n",\