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/* dirmngr.c - LDAP access
Copyright (C) 2008 g10 Code GmbH
This file is part of DirMngr.
DirMngr 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
(at your option) any later version.
DirMngr 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "dirmngr.h"
#include "ldapserver.h"
/* Release the list of SERVERS. As usual it is okay to call this
function with SERVERS passed as NULL. */
void
ldapserver_list_free (ldap_server_t servers)
{
while (servers)
{
ldap_server_t tmp = servers->next;
xfree (servers->host);
xfree (servers->user);
if (servers->pass)
memset (servers->pass, 0, strlen (servers->pass));
xfree (servers->pass);
xfree (servers->base);
xfree (servers);
servers = tmp;
}
}
/* Parse a single LDAP server configuration line. Returns the server
* or NULL in case of errors. The configuration line is assumed to be
* colon separated with these fields:
*
* 1. field: Hostname
* 2. field: Portnumber
* 3. field: Username
* 4. field: Password
* 5. field: Base DN
* 6. field: Flags
*
* Flags are:
*
* starttls := Use STARTTLS with a default port of 389
* ldaptls := Tunnel LDAP trough a TLS tunnel with default port 636
* plain := Switch to plain unsecured LDAP.
* (The last of these 3 flags is the effective one)
* ntds := Use Active Directory authentication
* areconly := Use option LDAP_OPT_AREC_EXCLUSIVE
*
* FILENAME and LINENO are used for diagnostic purposes only.
*/
ldap_server_t
ldapserver_parse_one (const char *line,
const char *filename, unsigned int lineno)
{
char *p;
const char *s;
ldap_server_t server;
int fieldno;
int fail = 0;
int i;
char **fields = NULL;
server = xtrycalloc (1, sizeof *server);
if (!server)
{
fail = 1;
goto leave;
}
fields = strtokenize (line, ":");
if (!fields)
{
fail = 1;
goto leave;
}
for (fieldno=0; (p = fields[fieldno]); fieldno++)
{
switch (fieldno)
{
case 0:
server->host = xtrystrdup (p);
if (!server->host)
fail = 1;
break;
case 1:
if (*p)
server->port = atoi (p);
break;
case 2:
server->user = xtrystrdup (p);
if (!server->user)
fail = 1;
break;
case 3:
if (*p && !server->user)
{
if (filename)
log_error (_("%s:%u: password given without user\n"),
filename, lineno);
else
log_error ("ldap: password given without user ('%s')\n", line);
fail = 1;
}
else if (*p)
{
server->pass = xtrystrdup (p);
if (!server->pass)
fail = 1;
}
break;
case 4:
if (*p)
{
server->base = xtrystrdup (p);
if (!server->base)
fail = 1;;
}
break;
case 5:
{
char **flags = NULL;
flags = strtokenize (p, ",");
if (!flags)
{
log_error ("strtokenize failed: %s\n",
gpg_strerror (gpg_error_from_syserror ()));
fail = 1;
break;
}
for (i=0; (s = flags[i]); i++)
{
if (!*s)
;
else if (!ascii_strcasecmp (s, "starttls"))
{
server->starttls = 1;
server->ldap_over_tls = 0;
}
else if (!ascii_strcasecmp (s, "ldaptls"))
{
server->starttls = 0;
server->ldap_over_tls = 1;
}
else if (!ascii_strcasecmp (s, "plain"))
{
server->starttls = 0;
server->ldap_over_tls = 0;
}
else if (!ascii_strcasecmp (s, "ntds"))
{
server->ntds = 1;
}
else if (!ascii_strcasecmp (s, "areconly"))
{
server->areconly = 1;
}
else
{
if (filename)
log_info (_("%s:%u: ignoring unknown flag '%s'\n"),
filename, lineno, s);
else
log_info ("ldap: unknown flag '%s' ignored in (%s)\n",
s, line);
}
}
xfree (flags);
}
break;
default:
/* (We silently ignore extra fields.) */
break;
}
}
leave:
if (fail)
{
if (filename)
log_info (_("%s:%u: skipping this line\n"), filename, lineno);
else
log_info ("ldap: error in server spec ('%s')\n", line);
ldapserver_list_free (server);
server = NULL;
}
xfree (fields);
return server;
}
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