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-rw-r--r--dirmngr/dirmngr_ldap.c854
1 files changed, 854 insertions, 0 deletions
diff --git a/dirmngr/dirmngr_ldap.c b/dirmngr/dirmngr_ldap.c
new file mode 100644
index 0000000..10bf1ac
--- /dev/null
+++ b/dirmngr/dirmngr_ldap.c
@@ -0,0 +1,854 @@
+/* dirmngr-ldap.c - The LDAP helper for dirmngr.
+ * Copyright (C) 2004, 2021 g10 Code GmbH
+ * Copyright (C) 2010 Free Software Foundation, Inc.
+ *
+ * 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 <stdlib.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#ifdef HAVE_SIGNAL_H
+# include <signal.h>
+#endif
+#include <errno.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#ifdef HAVE_W32_SYSTEM
+# include <winsock2.h>
+# include <winldap.h>
+# include <winber.h>
+# include <fcntl.h>
+# include "ldap-url.h"
+#else
+ /* For OpenLDAP, to enable the API that we're using. */
+# define LDAP_DEPRECATED 1
+# include <ldap.h>
+#endif
+
+
+#include <gpg-error.h>
+#include "../common/logging.h"
+#include "../common/argparse.h"
+#include "../common/stringhelp.h"
+#include "../common/mischelp.h"
+#include "../common/strlist.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
+ * the case we ever want to reuse parts of the code in npth programs. */
+static void npth_unprotect (void) { }
+static void npth_protect (void) { }
+
+
+#ifdef HAVE_W32_SYSTEM
+ typedef LDAP_TIMEVAL my_ldap_timeval_t;
+#else
+ typedef struct timeval my_ldap_timeval_t;
+#endif
+
+#define DEFAULT_LDAP_TIMEOUT 15 /* Arbitrary long timeout. */
+
+
+/* Constants for the options. */
+enum
+ {
+ oQuiet = 'q',
+ oVerbose = 'v',
+
+ oTimeout = 500,
+ oMulti,
+ oProxy,
+ oHost,
+ oPort,
+ oUser,
+ oPass,
+ oEnvPass,
+ oBase,
+ oAttr,
+ oStartTLS,
+ oLdapTLS,
+ oNtds,
+ oARecOnly,
+
+ oOnlySearchTimeout,
+ oLogWithPID
+ };
+
+
+/* The list of options as used by the argparse.c code. */
+static ARGPARSE_OPTS opts[] = {
+ { 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,
+ "|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"},
+ { oARecOnly, "areconly", 0, "do only an A record lookup"},
+ { 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. */
+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 starttls;
+ int ldaptls;
+ int ntds;
+ int areconly;
+
+ estream_t outstream; /* Send output to this stream. */
+
+ /* Note that we can't use const for the strings because ldap_* are
+ not defined that way. */
+ char *proxy; /* Host and Port override. */
+ char *user; /* Authentication user. */
+ char *pass; /* Authentication password. */
+ char *host; /* Override host. */
+ int port; /* Override port. */
+ char *base; /* Override DN. */
+ char *attr; /* Override attribute. */
+} opt;
+
+
+/* Prototypes. */
+#ifndef HAVE_W32_SYSTEM
+static void catch_alarm (int dummy);
+#endif
+static gpg_error_t connect_ldap (LDAP **r_ld);
+static gpg_error_t process_filter (LDAP *ld, const char *string);
+
+
+
+/* Function called by argparse.c to display information. */
+static const char *
+my_strusage (int level)
+{
+ const char *p;
+
+ switch(level)
+ {
+ case 9: p = "GPL-3.0-or-later"; break;
+ case 11: p = "dirmngr_ldap (@GNUPG@)";
+ break;
+ 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 49: p = PACKAGE_BUGREPORT; break;
+ case 1:
+ case 40: p =
+ "Usage: dirmngr_ldap [options] filters (-h for help)\n";
+ break;
+ case 41: p =
+ ("Syntax: dirmngr_ldap [options] filters\n"
+ "Internal LDAP helper for Dirmngr\n"
+ "Interface and options may change without notice\n");
+ break;
+
+ default: p = NULL;
+ }
+ return p;
+}
+
+
+int
+main (int argc, char **argv)
+{
+ ARGPARSE_ARGS pargs;
+ int any_err = 0;
+ char *p;
+ int only_search_timeout = 0;
+ char *malloced_buffer1 = NULL;
+ LDAP *ld;
+
+ early_system_init ();
+
+ set_strusage (my_strusage);
+ log_set_prefix ("dirmngr_ldap", GPGRT_LOG_WITH_PREFIX);
+
+ init_common_subsystems (&argc, &argv);
+
+ es_set_binary (es_stdout);
+ opt.outstream = es_stdout;
+
+ /* LDAP defaults */
+ opt.timeout.tv_sec = DEFAULT_LDAP_TIMEOUT;
+ opt.timeout.tv_usec = 0;
+ opt.alarm_timeout = 0;
+
+ /* Parse the command line. */
+ pargs.argc = &argc;
+ pargs.argv = &argv;
+ pargs.flags= ARGPARSE_FLAG_KEEP;
+ while (gnupg_argparse (NULL, &pargs, opts))
+ {
+ switch (pargs.r_opt)
+ {
+ case oVerbose: opt.verbose++; break;
+ case oQuiet: opt.quiet++; break;
+ case oTimeout:
+ 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 oStartTLS: opt.starttls = 1; opt.ldaptls = 0; break;
+ case oLdapTLS: opt.starttls = 0; opt.ldaptls = 1; break;
+ case oNtds: opt.ntds = 1; break;
+ case oARecOnly: opt.areconly = 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:
+ opt.pass = getenv ("DIRMNGR_LDAP_PASS");
+ 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;
+ log_get_prefix (&oldflags);
+ log_set_prefix (NULL, oldflags | GPGRT_LOG_WITH_PID);
+ }
+ break;
+
+ default :
+ pargs.err = ARGPARSE_PRINT_ERROR;
+ break;
+ }
+ }
+ gnupg_argparse (NULL, &pargs, NULL); /* Release internal state. */
+
+ if (only_search_timeout)
+ opt.alarm_timeout = 0;
+
+ if (opt.proxy)
+ {
+ malloced_buffer1 = xtrystrdup (opt.proxy);
+ if (!malloced_buffer1)
+ {
+ log_error ("error copying string: %s\n", strerror (errno));
+ return 1;
+ }
+ opt.host = malloced_buffer1;
+ p = strchr (opt.host, ':');
+ if (p)
+ {
+ *p++ = 0;
+ opt.port = atoi (p);
+ }
+ if (!opt.port)
+ opt.port = 389; /* make sure ports gets overridden. */
+ }
+
+ 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 (opt.alarm_timeout)
+ {
+#ifndef HAVE_W32_SYSTEM
+# if defined(HAVE_SIGACTION) && defined(HAVE_STRUCT_SIGACTION)
+ struct sigaction act;
+
+ act.sa_handler = catch_alarm;
+ sigemptyset (&act.sa_mask);
+ act.sa_flags = 0;
+ if (sigaction (SIGALRM,&act,NULL))
+# else
+ if (signal (SIGALRM, catch_alarm) == SIG_ERR)
+# endif
+ log_fatal ("unable to register timeout handler\n");
+#endif
+ }
+
+ if (connect_ldap (&ld))
+ any_err = 1;
+ else
+ {
+ if (!argc)
+ {
+ if (process_filter (ld, "(objectClass=*)"))
+ 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;
+}
+
+#ifndef HAVE_W32_SYSTEM
+static void
+catch_alarm (int dummy)
+{
+ (void)dummy;
+ _exit (10);
+}
+#endif
+
+
+#ifdef HAVE_W32_SYSTEM
+static DWORD CALLBACK
+alarm_thread (void *arg)
+{
+ HANDLE timer = arg;
+
+ WaitForSingleObject (timer, INFINITE);
+ _exit (10);
+
+ return 0;
+}
+#endif
+
+
+static void
+set_timeout (void)
+{
+ 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 * opt.alarm_timeout;
+
+ if (!timer)
+ {
+ SECURITY_ATTRIBUTES sec_attr;
+ DWORD tid;
+
+ memset (&sec_attr, 0, sizeof sec_attr);
+ sec_attr.nLength = sizeof sec_attr;
+ sec_attr.bInheritHandle = FALSE;
+
+ /* Create a manual resetable timer. */
+ timer = CreateWaitableTimer (NULL, TRUE, NULL);
+ /* Initially set the timer. */
+ SetWaitableTimer (timer, &due_time, 0, NULL, NULL, 0);
+
+ if (CreateThread (&sec_attr, 0, alarm_thread, timer, 0, &tid))
+ log_error ("failed to create alarm thread\n");
+ }
+ else /* Retrigger the timer. */
+ SetWaitableTimer (timer, &due_time, 0, NULL, NULL, 0);
+#else
+ 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;
+ }
+ if (opt.areconly)
+ {
+ lerr = ldap_set_option (ld, LDAP_OPT_AREC_EXCLUSIVE, LDAP_OPT_ON);
+ if (lerr != LDAP_SUCCESS)
+ {
+ log_error ("ldap: unable to set AREC_EXLUSIVE: %s\n",
+ ldap_err2string (lerr));
+ err = ldap_err_to_gpg_err (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 (LDAP *ld, LDAPMessage *msg, char *want_attr)
+{
+ LDAPMessage *item;
+ int any = 0;
+
+ for (npth_unprotect (), item = ldap_first_entry (ld, msg), npth_protect ();
+ item;
+ npth_unprotect (), item = ldap_next_entry (ld, item), npth_protect ())
+ {
+ BerElement *berctx;
+ char *attr;
+
+ if (opt.verbose > 1)
+ log_info ("scanning result for attribute '%s'\n",
+ want_attr? want_attr : "[all]");
+
+ if (opt.multi)
+ { /* Write item marker. */
+ if (es_fwrite ("I\0\0\0\0", 5, 1, opt.outstream) != 1)
+ {
+ log_error ("error writing to stdout: %s\n",
+ strerror (errno));
+ return -1;
+ }
+ }
+
+
+ for (npth_unprotect (), attr = ldap_first_attribute (ld, item, &berctx),
+ npth_protect ();
+ attr;
+ npth_unprotect (), attr = ldap_next_attribute (ld, item, berctx),
+ npth_protect ())
+ {
+ struct berval **values;
+ int idx;
+
+ if (opt.verbose > 1)
+ log_info (" available attribute '%s'\n", attr);
+
+ set_timeout ();
+
+ /* I case we want only one attribute we do a case
+ insensitive compare without the optional extension
+ (i.e. ";binary"). Case insensitive is not really correct
+ but the best we can do. */
+ if (want_attr)
+ {
+ char *cp1, *cp2;
+ int cmpres;
+
+ cp1 = strchr (want_attr, ';');
+ if (cp1)
+ *cp1 = 0;
+ cp2 = strchr (attr, ';');
+ if (cp2)
+ *cp2 = 0;
+ cmpres = ascii_strcasecmp (want_attr, attr);
+ if (cp1)
+ *cp1 = ';';
+ if (cp2)
+ *cp2 = ';';
+ if (cmpres)
+ {
+ ldap_memfree (attr);
+ continue; /* Not found: Try next attribute. */
+ }
+ }
+
+ npth_unprotect ();
+ values = ldap_get_values_len (ld, item, attr);
+ npth_protect ();
+
+ if (!values)
+ {
+ if (opt.verbose)
+ log_info ("attribute '%s' not found\n", attr);
+ ldap_memfree (attr);
+ continue;
+ }
+
+ if (opt.verbose)
+ {
+ 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 (opt.multi)
+ { /* Write attribute marker. */
+ unsigned char tmp[5];
+ size_t n = strlen (attr);
+
+ tmp[0] = 'A';
+ tmp[1] = (n >> 24);
+ tmp[2] = (n >> 16);
+ tmp[3] = (n >> 8);
+ tmp[4] = (n);
+ 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",
+ strerror (errno));
+ ldap_value_free_len (values);
+ ldap_memfree (attr);
+ ber_free (berctx, 0);
+ return -1;
+ }
+ }
+
+ for (idx=0; values[idx]; idx++)
+ {
+ if (opt.multi)
+ { /* Write value marker. */
+ unsigned char tmp[5];
+ size_t n = values[0]->bv_len;
+
+ tmp[0] = 'V';
+ tmp[1] = (n >> 24);
+ tmp[2] = (n >> 16);
+ tmp[3] = (n >> 8);
+ tmp[4] = (n);
+
+ if (es_fwrite (tmp, 5, 1, opt.outstream) != 1)
+ {
+ log_error ("error writing to stdout: %s\n",
+ strerror (errno));
+ ldap_value_free_len (values);
+ ldap_memfree (attr);
+ ber_free (berctx, 0);
+ return -1;
+ }
+ }
+
+ if (es_fwrite (values[0]->bv_val, values[0]->bv_len,
+ 1, opt.outstream) != 1)
+ {
+ log_error ("error writing to stdout: %s\n",
+ strerror (errno));
+ ldap_value_free_len (values);
+ ldap_memfree (attr);
+ ber_free (berctx, 0);
+ return -1;
+ }
+
+ any = 1;
+ if (!opt.multi)
+ break; /* Print only the first value. */
+ }
+ ldap_value_free_len (values);
+ ldap_memfree (attr);
+ if (want_attr || !opt.multi)
+ break; /* We only want to return the first attribute. */
+ }
+ ber_free (berctx, 0);
+ }
+
+ if (opt.verbose > 1 && any)
+ log_info ("result has been printed\n");
+
+ return any?0:-1;
+}
+
+
+
+/* Fetch data from the server at LD using FILTER. */
+static int
+fetch_ldap (LDAP *ld, char *base, int scope, char *filter)
+{
+ gpg_error_t err;
+ int lerr;
+ LDAPMessage *msg;
+ char *attrs[2];
+
+ if (filter && !*filter)
+ filter = NULL;
+
+ if (opt.verbose)
+ {
+ log_info ("fetching using");
+ if (base)
+ log_printf (" base '%s'", base);
+ if (filter)
+ log_printf (" filter '%s'", filter);
+ log_printf ("\n");
+ }
+
+ attrs[0] = opt.attr;
+ attrs[1] = NULL;
+
+ set_timeout ();
+ npth_unprotect ();
+ lerr = ldap_search_st (ld, base, scope, filter,
+ attrs,
+ 0,
+ &opt.timeout, &msg);
+ npth_protect ();
+ if (lerr == LDAP_SIZELIMIT_EXCEEDED && opt.multi)
+ {
+ if (es_fwrite ("E\0\0\0\x09truncated", 14, 1, opt.outstream) != 1)
+ {
+ log_error ("error writing to stdout: %s\n", strerror (errno));
+ return -1;
+ }
+ }
+ else if (lerr)
+ {
+ 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? */
+ return -1;
+ }
+ }
+
+ err = print_ldap_entries (ld, msg, opt.multi? NULL:opt.attr);
+
+ ldap_msgfree (msg);
+ return err;
+}
+
+
+
+
+/* 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)
+{
+ 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);
+
+ xfree (base);
+ xfree (filter);
+ return err;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-04 03:27:39 +0000