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ldap-sldap.c
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ldap-sldap.c
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/* Copyright (C) 2006 Luke Howard.
This file is part of the nss_ldap library.
Contributed by Luke Howard, <[email protected]>, 2006.
The nss_ldap library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The nss_ldap library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the nss_ldap library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
$Id$
*/
static char rcsId[] =
"$Id$";
#include "config.h"
#ifdef HAVE_PORT_BEFORE_H
#include <port_before.h>
#endif
#if defined(HAVE_THREAD_H) && !defined(_AIX)
#include <thread.h>
#elif defined(HAVE_PTHREAD_H)
#include <pthread.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <netdb.h>
#include <assert.h>
#ifdef HAVE_LBER_H
#include <lber.h>
#endif
#ifdef HAVE_LDAP_H
#include <ldap.h>
#endif
#include <sys/types.h>
#include <sys/socket.h>
#ifdef HAVE_NET_ROUTE_H
#include <net/route.h>
#endif
#include <net/if.h>
#include <netinet/in.h>
#include "ldap-nss.h"
#include "ldap-automount.h"
#include "ldap-sldap.h"
#include "util.h"
#ifdef HAVE_PORT_AFTER_H
#include <port_after.h>
#endif
#ifdef HAVE_NSSWITCH_H
/*
* This implements enough of the Solaris libsldap interface in order
* for the automounter to work.
*/
static ns_ldap_return_code __ns_ldap_initResult (ns_ldap_result_t ** pResult);
static ns_ldap_return_code __ns_ldap_initSearch (ns_ldap_cookie_t * cookie);
static ldap_map_selector_t __ns_ldap_str2selector (const char *map);
static ns_ldap_return_code __ns_ldap_unmapObjectClasses (ns_ldap_cookie_t *
cookie,
char **mappedClasses,
char
***pOrigClasses);
static const char *
NS_LDAP_ERR2STR (ns_ldap_return_code err)
{
char *str = NULL;
__ns_ldap_err2str (err, &str);
return str;
}
static void **
__ns_ldap_makeStringParam (const char *string)
{
void **p;
p = (void **) malloc (2 * sizeof (void *));
if (p == NULL)
{
return NULL;
}
p[0] = strdup (string);
if (p[0] == NULL)
{
free (p);
return NULL;
}
p[1] = NULL;
return p;
}
char **
__ns_ldap_getMappedAttributes (const char *service, const char *attribute)
{
const char *mapped;
mapped = _nss_ldap_map_at (__ns_ldap_str2selector (service), attribute);
if (mapped == NULL)
{
return NULL;
}
return (char **) __ns_ldap_makeStringParam (mapped);
}
char **
__ns_ldap_getMappedObjectClass (const char *service, const char *objectClass)
{
const char *mapped;
mapped = _nss_ldap_map_oc (__ns_ldap_str2selector (service), objectClass);
if (mapped == NULL)
{
return NULL;
}
return (char **) __ns_ldap_makeStringParam (mapped);
}
static ns_ldap_return_code
__ns_ldap_mapError (NSS_STATUS error)
{
ns_ldap_return_code code;
switch (error)
{
case NSS_SUCCESS:
code = NS_LDAP_SUCCESS;
break;
case NSS_TRYAGAIN:
code = NS_LDAP_MEMORY;
break;
case NSS_NOTFOUND:
code = NS_LDAP_NOTFOUND;
break;
case NSS_UNAVAIL:
default:
code = NS_LDAP_OP_FAILED;
break;
}
return code;
}
static ns_ldap_return_code
__ns_ldap_mapErrorDetail (ns_ldap_return_code code, ns_ldap_error_t ** errorp)
{
char *m = NULL;
char *s = NULL;
*errorp = (ns_ldap_error_t *) calloc (1, sizeof (ns_ldap_error_t));
if (*errorp == NULL)
{
return NS_LDAP_MEMORY;
}
(*errorp)->status = _nss_ldap_get_ld_errno (&m, &s);
(*errorp)->message = (m != NULL) ? strdup (m) : NULL;
return code;
}
ns_ldap_return_code
__ns_ldap_freeError (ns_ldap_error_t ** errorp)
{
if (errorp == NULL)
{
return NS_LDAP_INVALID_PARAM;
}
if (*errorp != NULL)
{
if ((*errorp)->message != NULL)
{
free ((*errorp)->message);
(*errorp)->message = NULL;
}
free (*errorp);
*errorp = NULL;
}
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_freeParam (void ***data)
{
void **p;
if (*data != NULL)
{
for (p = *data; *p != NULL; p++)
{
free (*p);
*p = NULL;
}
free (*data);
*data = NULL;
}
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_getParam (const ParamIndexType type, void ***data,
ns_ldap_error_t ** errorp)
{
ns_ldap_return_code ret;
*errorp = NULL;
debug ("==> __ns_ldap_getParam (param=%d)", type);
switch (type)
{
case NS_LDAP_FILE_VERSION_P:
*data = __ns_ldap_makeStringParam (NS_LDAP_VERSION);
ret = NS_LDAP_SUCCESS;
break;
default:
ret = NS_LDAP_INVALID_PARAM;
break;
}
debug ("<== __ns_ldap_getParam (ret=%s)", NS_LDAP_ERR2STR (ret));
return ret;
}
ns_ldap_return_code
__ns_ldap_freeAttr (ns_ldap_attr_t ** pAttr)
{
int i;
ns_ldap_attr_t *attr = *pAttr;
if (attr != NULL)
{
if (attr->attrname != NULL)
{
free (attr->attrname);
}
if (attr->attrvalue != NULL)
{
for (i = 0; i < attr->value_count; i++)
{
free (attr->attrvalue[i]);
}
free (attr->attrvalue);
}
}
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_freeEntry (ns_ldap_entry_t ** pentry)
{
int i;
ns_ldap_entry_t *entry = *pentry;
if (entry != NULL)
{
if (entry->attr_pair != NULL)
{
for (i = 0; i < entry->attr_count; i++)
{
__ns_ldap_freeAttr (&entry->attr_pair[i]);
}
free (entry->attr_pair);
}
free (entry);
*pentry = NULL;
}
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_freeResult (ns_ldap_result_t ** pResult)
{
ns_ldap_result_t *result;
ns_ldap_entry_t *entry, *next = NULL;
if (pResult == NULL)
{
return NS_LDAP_INVALID_PARAM;
}
result = *pResult;
if (result == NULL)
{
return NS_LDAP_SUCCESS;
}
entry = result->entry;
while (entry != NULL)
{
next = entry->next;
__ns_ldap_freeEntry (&entry);
entry = next;
}
free (result);
*pResult = NULL;
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_allocAttr (ns_ldap_attr_t ** pAttr)
{
ns_ldap_attr_t *attr;
*pAttr = NULL;
attr = (ns_ldap_attr_t *) malloc (sizeof (*attr));
if (attr == NULL)
{
return NS_LDAP_MEMORY;
}
attr->attrname = NULL;
attr->attrvalue = NULL;
attr->value_count = 0;
*pAttr = attr;
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_parseAttr (ns_ldap_cookie_t * cookie,
LDAPMessage * entry,
const char *attribute, ns_ldap_attr_t ** pAttr)
{
ns_ldap_attr_t *attr;
const char *unmappedAttribute;
ns_ldap_return_code ret;
char **values;
int freeValues = 1;
ret = __ns_ldap_allocAttr (&attr);
if (ret != NS_LDAP_SUCCESS)
{
return ret;
}
if ((cookie->flags & NS_LDAP_NOMAP) == 0)
{
unmappedAttribute = _nss_ldap_unmap_at (cookie->sel, attribute);
if (unmappedAttribute == NULL)
{
__ns_ldap_freeAttr (&attr);
return NS_LDAP_INVALID_PARAM;
}
}
else
{
unmappedAttribute = attribute;
}
attr->attrname = strdup (unmappedAttribute);
if (attr->attrname == NULL)
{
__ns_ldap_freeAttr (&attr);
return NS_LDAP_MEMORY;
}
attr->attrvalue = NULL;
values = _nss_ldap_get_values (entry, attribute);
if ((cookie->flags & NS_LDAP_NOMAP) == 0)
{
if (strcasecmp (attribute, "objectClass") == 0)
{
/* Map object class values */
ret =
__ns_ldap_unmapObjectClasses (cookie, values, &attr->attrvalue);
if (ret != NS_LDAP_SUCCESS)
{
__ns_ldap_freeAttr (&attr);
return ret;
}
}
}
if (attr->attrvalue == NULL)
{
attr->attrvalue = values;
freeValues = 0;
}
attr->value_count =
(attr->attrvalue != NULL) ? ldap_count_values (attr->attrvalue) : 0;
if (freeValues)
{
ldap_value_free (values);
}
*pAttr = attr;
return NS_LDAP_SUCCESS;
}
ns_ldap_return_code
__ns_ldap_parseDn (ns_ldap_cookie_t * cookie, LDAPMessage * entry,
ns_ldap_attr_t ** pAttr)
{
ns_ldap_attr_t *attr;
ns_ldap_return_code ret;
ret = __ns_ldap_allocAttr (&attr);
if (ret != NS_LDAP_SUCCESS)
{
return ret;
}
attr->attrname = strdup ("dn");
if (attr->attrname == NULL)
{
__ns_ldap_freeAttr (&attr);
return NS_LDAP_MEMORY;
}
attr->value_count = 1;
attr->attrvalue = (char **) malloc (1 * sizeof (char *));
if (attr->attrvalue == NULL)
{
__ns_ldap_freeAttr (&attr);
return NS_LDAP_MEMORY;
}
attr->attrvalue[0] = _nss_ldap_get_dn (entry);
if (attr->attrvalue[0] == NULL)
{
__ns_ldap_freeAttr (&attr);
return NS_LDAP_MEMORY;
}
*pAttr = attr;
return NS_LDAP_SUCCESS;
}
NSS_STATUS
__ns_ldap_parseEntry (LDAPMessage * msg, ldap_state_t * state,
void *result, char *buffer, size_t buflen)
{
ns_ldap_cookie_t *cookie = (ns_ldap_cookie_t *) result;
char *attribute;
BerElement *ber = NULL;
ns_ldap_return_code ret = NS_LDAP_SUCCESS;
ns_ldap_entry_t *entry;
int attr_count;
#ifdef DEBUG
{
char *dn = _nss_ldap_get_dn (msg);
debug ("==> __ns_ldap_parseEntry (%s)", dn);
ldap_memfree (dn);
}
#endif
entry = (ns_ldap_entry_t *) malloc (sizeof (*entry));
if (entry == NULL)
{
cookie->ret = NS_LDAP_MEMORY;
debug ("<== __ns_ldap_parseEntry (no memory)");
return NSS_NOTFOUND;
}
entry->attr_count = 0;
entry->attr_pair = NULL;
entry->next = NULL;
attr_count = 1; /* for DN */
for (attribute = _nss_ldap_first_attribute (msg, &ber);
attribute != NULL; attribute = _nss_ldap_next_attribute (msg, ber))
{
attr_count++;
#ifdef HAVE_LDAP_MEMFREE
ldap_memfree (attribute);
#endif
}
if (ber != NULL)
ber_free (ber, 0);
entry->attr_pair =
(ns_ldap_attr_t **) calloc (attr_count, sizeof (ns_ldap_attr_t *));
if (entry->attr_pair == NULL)
{
__ns_ldap_freeEntry (&entry);
cookie->ret = NS_LDAP_MEMORY;
debug ("<== __ns_ldap_parseEntry (no memory)");
return NSS_NOTFOUND;
}
ret = __ns_ldap_parseDn (cookie, msg, &entry->attr_pair[entry->attr_count]);
if (ret != NS_LDAP_SUCCESS)
{
__ns_ldap_freeEntry (&entry);
cookie->ret = ret;
debug ("<== __ns_ldap_parseEntry (failed to parse DN)");
return ret;
}
entry->attr_count++;
for (attribute = _nss_ldap_first_attribute (msg, &ber);
attribute != NULL; attribute = _nss_ldap_next_attribute (msg, ber))
{
ns_ldap_attr_t *attr;
ret = __ns_ldap_parseAttr (cookie, msg, attribute, &attr);
#ifdef HAVE_LDAP_MEMFREE
ldap_memfree (attribute);
#endif
if (ret != NS_LDAP_SUCCESS)
{
continue;
}
entry->attr_pair[entry->attr_count++] = attr;
}
if (ber != NULL)
ber_free (ber, 0);
if (ret == NS_LDAP_SUCCESS)
{
ns_ldap_entry_t *last;
if (cookie->result == NULL)
{
ret = __ns_ldap_initResult (&cookie->result);
if (ret != NS_LDAP_SUCCESS)
{
__ns_ldap_freeEntry (&entry);
cookie->ret = ret;
debug ("<== __ns_ldap_parseEntry (failed to init result: %s)",
NS_LDAP_ERR2STR (ret));
return __ns_ldap_mapError (ret);
}
cookie->result->entry = entry;
}
else
{
assert (cookie->entry != NULL);
for (last = cookie->entry; last->next != NULL; last = last->next)
;
last->next = entry;
}
cookie->entry = entry;
if (cookie->callback != NULL)
{
cookie->cb_ret = (*cookie->callback) (entry, cookie->userdata);
}
cookie->result->entries_count++;
}
else
{
__ns_ldap_freeEntry (&entry);
}
cookie->ret = ret;
debug ("<== __ns_ldap_parseEntry (ret=%s)", NS_LDAP_ERR2STR (ret));
return __ns_ldap_mapError (ret);
}
static ns_ldap_return_code
__ns_ldap_initResult (ns_ldap_result_t ** pResult)
{
ns_ldap_result_t *result;
result = (ns_ldap_result_t *) malloc (sizeof (ns_ldap_result_t));
if (result == NULL)
{
return NS_LDAP_MEMORY;
}
result->entries_count = 0;
result->entry = NULL;
*pResult = result;
return NS_LDAP_SUCCESS;
}
static ldap_map_selector_t
__ns_ldap_str2selector (const char *map)
{
ldap_map_selector_t sel;
if (map == NULL)
{
sel = LM_NONE;
}
else
{
sel = _nss_ldap_str2selector (map);
if (strcmp (map, "automount") == 0)
{
sel = LM_NONE; /* for enumeration only */
}
else if (sel == LM_NONE && (strncmp (map, "auto_", 5)) == 0)
{
sel = LM_AUTOMOUNT;
}
else
{
sel = _nss_ldap_str2selector (map);
}
}
return sel;
}
static ns_ldap_return_code
__ns_ldap_unmapObjectClasses (ns_ldap_cookie_t * cookie, char **mappedClasses,
char ***pOrigClasses)
{
char **origClasses = NULL;
int count, i;
count = ldap_count_values (mappedClasses);
origClasses = (char **) calloc (count + 1, sizeof (char *));
if (origClasses == NULL)
{
return NS_LDAP_MEMORY;
}
for (i = 0; i < count; i++)
{
origClasses[i] =
strdup (_nss_ldap_unmap_oc (cookie->sel, mappedClasses[i]));
if (origClasses[i] == NULL)
{
ldap_value_free (origClasses);
return NS_LDAP_MEMORY;
}
}
origClasses[i] = NULL;
*pOrigClasses = origClasses;
return NS_LDAP_SUCCESS;
}
static ns_ldap_return_code
__ns_ldap_mapAttributes (ns_ldap_cookie_t * cookie, const char ***pAttributes)
{
const char **attributes;
int i;
*pAttributes = NULL;
if (cookie->attribute == NULL)
{
return NS_LDAP_SUCCESS;
}
for (i = 0; cookie->attribute[i] != NULL; i++)
;
attributes = (const char **) calloc (i + 1, sizeof (char **));
if (attributes == NULL)
{
return NS_LDAP_MEMORY;
}
for (i = 0; cookie->attribute[i] != NULL; i++)
{
attributes[i] = _nss_ldap_map_at (cookie->sel, cookie->attribute[i]);
assert (attributes[i] != NULL);
}
attributes[i] = NULL;
*pAttributes = attributes;
return NS_LDAP_SUCCESS;
}
static ns_ldap_return_code
__ns_ldap_emitFilterString (char **pFilter, size_t * len, size_t * size,
const char *s)
{
size_t slen = strlen (s);
char *filter;
if (*len + slen >= *size)
{
/* need some more space */
size_t newSize = *size;
char *newFilter;
if (newSize == 0)
newSize = NSS_BUFSIZ;
else
newSize *= 2;
newFilter = realloc (*pFilter, newSize);
if (newFilter == NULL)
{
return NS_LDAP_MEMORY;
}
*pFilter = newFilter;
*size = newSize;
}
filter = *pFilter;
memcpy (&filter[*len], s, slen);
filter[*len + slen] = '\0';
*len += slen;
return NS_LDAP_SUCCESS;
}
#define EMIT_STRING(_s) do { \
ns_ldap_return_code ret = __ns_ldap_emitFilterString(&filter, &len, &size, (_s)); \
if (ret != NS_LDAP_SUCCESS) { \
if (filter != NULL) free(filter); \
return ret; \
} \
} while (0)
#define EMIT_CHAR(_c) do { \
char _s[2]; \
ns_ldap_return_code ret; \
_s[0] = _c; \
_s[1] = '\0'; \
ret = __ns_ldap_emitFilterString(&filter, &len, &size, (_s)); \
if (ret != NS_LDAP_SUCCESS) { \
if (filter != NULL) free(filter); \
return ret; \
} \
} while (0)
static ns_ldap_return_code
__ns_ldap_mapFilter (ns_ldap_cookie_t * cookie, char **pFilter)
{
enum
{ EXPECT_LHS, FOUND_LHS, EXPECT_RHS, FOUND_RHS } state;
char *lhs = NULL;
char *rhs = NULL;
size_t len = 0, size = 0;
char tmp;
size_t i;
char *filter = NULL;
size_t filterLen = strlen (cookie->filter);
state = EXPECT_LHS;
for (i = 0; i <= filterLen; i++)
{
switch (state)
{
case EXPECT_LHS:
switch (cookie->filter[i])
{
case '(':
case ')':
case '&':
case '|':
case '!':
EMIT_CHAR (cookie->filter[i]);
break;
default:
state = FOUND_LHS;
lhs = &cookie->filter[i];
break;
}
break;
case FOUND_LHS:
switch (cookie->filter[i])
{
case '<':
case '=':
case '>':
case '~':
state = EXPECT_RHS;
tmp = cookie->filter[i];
cookie->filter[i] = '\0';
/* map LHS (attribute type) */
EMIT_STRING (_nss_ldap_map_at (cookie->sel, lhs));
EMIT_CHAR (tmp);
break;
default:
break;
}
break;
case EXPECT_RHS:
switch (cookie->filter[i])
{
case '<':
case '=':
case '>':
case '~':
EMIT_CHAR (cookie->filter[i]);
break;
default:
state = FOUND_RHS;
rhs = &cookie->filter[i];
break;
}
break;
case FOUND_RHS:
switch (cookie->filter[i])
{
case '&':
case '|':
case '!':
case ')':
case '\0':
state = EXPECT_LHS;
tmp = cookie->filter[i];;
cookie->filter[i] = '\0';
if (strcasecmp (lhs, "objectClass") == 0)
EMIT_STRING (_nss_ldap_map_oc (cookie->sel, rhs));
else
EMIT_STRING (rhs);
if (strcasecmp (rhs, "automount") == 0)
cookie->sel = LM_AUTOMOUNT;
EMIT_CHAR (tmp);
break;
default:
break;
}
break;
}
}
*pFilter = filter;
return NS_LDAP_SUCCESS;
}
static ns_ldap_return_code
__ns_ldap_freeCookie (ns_ldap_cookie_t ** pCookie)
{
ns_ldap_cookie_t *cookie;
cookie = *pCookie;
if (cookie != NULL)
{
if (cookie->map != NULL)
free (cookie->map);
if (cookie->filter != NULL)
free (cookie->filter);
if (cookie->attribute != NULL)
ldap_value_free (cookie->attribute);
if (cookie->state != NULL)
{
_nss_ldap_ent_context_release (&(cookie->state));
}
if (cookie->mapped_filter != NULL)
free (cookie->mapped_filter);
if (cookie->mapped_attribute != NULL)
free (cookie->mapped_attribute);
_nss_ldap_am_context_free (&cookie->am_state);
__ns_ldap_freeResult (&cookie->result);
free (cookie);
}
*pCookie = NULL;
return NS_LDAP_SUCCESS;
}
static ns_ldap_return_code
__ns_ldap_initCookie (const char *map,
const char *filter,
int (*init_filter_cb) (const ns_ldap_search_desc_t *
desc, char **realfilter,
const void *userdata),
const char *const *attribute, const ns_cred_t * cred,
const int flags, ns_ldap_cookie_t ** pCookie,
int (*callback) (const ns_ldap_entry_t * entry,
const void *userdata),
const void *userdata)
{
ns_ldap_cookie_t *cookie;
ns_ldap_return_code ret;
size_t i;
assert (pCookie != NULL && *pCookie == NULL);
ret = __ns_ldap_mapError (_nss_ldap_init ());
if (ret != NS_LDAP_SUCCESS)
{
return ret;
}
cookie = (ns_ldap_cookie_t *) calloc (1, sizeof (*cookie));
if (cookie == NULL)
{
return NS_LDAP_MEMORY;
}
if (filter == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_INVALID_PARAM;
}
if (map != NULL)
{
cookie->map = strdup (map);
if (cookie->map == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_MEMORY;
}
}
cookie->filter = strdup (filter);
if (cookie->filter == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_MEMORY;
}
if (attribute != NULL)
{
for (i = 0; attribute[i] != NULL; i++)
;
cookie->attribute = (char **) calloc (i + 1, sizeof (char *));
if (cookie->attribute == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_MEMORY;
}
for (i = 0; attribute[i] != NULL; i++)
{
cookie->attribute[i] = strdup (attribute[i]);
if (cookie->attribute[i] == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_MEMORY;
}
}
cookie->attribute[i] = NULL;
}
cookie->flags = flags;
cookie->init_filter_cb = init_filter_cb;
cookie->callback = callback;
cookie->userdata = userdata;
cookie->ret = -1;
cookie->cb_ret = NS_LDAP_CB_NEXT;
cookie->erange = 0;
cookie->sel = __ns_ldap_str2selector (map);
if (_nss_ldap_ent_context_init_locked (&cookie->state) == NULL)
{
__ns_ldap_freeCookie (&cookie);
return NS_LDAP_INTERNAL;
}
cookie->result = NULL;
cookie->entry = NULL;