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curl/lib/ldap.c

277 lines
8.5 KiB
C
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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#ifndef CURL_DISABLE_LDAP
/* -- WIN32 approved -- */
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#if defined(WIN32) && !defined(__GNUC__)
#else
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
# ifdef HAVE_DLFCN_H
# include <dlfcn.h>
# endif
#endif
#include "urldata.h"
#include <curl/curl.h>
#include "sendf.h"
#include "escape.h"
#include "transfer.h"
#include "ldap.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
typedef void * (*dynafunc)(void *input);
#define DYNA_GET_FUNCTION(type, fnc) \
(fnc) = (type)DynaGetFunction(#fnc); \
if ((fnc) == NULL) { \
return CURLE_FUNCTION_NOT_FOUND; \
}
/***********************************************************************
*/
static void *libldap = NULL;
static void *liblber = NULL;
static void DynaOpen(void)
{
#if defined(HAVE_DLOPEN) || defined(HAVE_LIBDL)
if (libldap == NULL) {
/*
* libldap.so should be able to resolve its dependency on
* liblber.so automatically, but since it does not we will
* handle it here by opening liblber.so as global.
*/
liblber = dlopen("liblber.so",
#ifdef RTLD_LAZY_GLOBAL /* It turns out some systems use this: */
RTLD_LAZY_GLOBAL
#else
#ifdef RTLD_GLOBAL
RTLD_LAZY | RTLD_GLOBAL
#else
/* and some systems don't have the RTLD_GLOBAL symbol */
RTLD_LAZY
#endif
#endif
);
libldap = dlopen("libldap.so", RTLD_LAZY);
}
#endif
}
static void DynaClose(void)
{
#if defined(HAVE_DLOPEN) || defined(HAVE_LIBDL)
if (libldap) {
dlclose(libldap);
libldap=NULL;
}
if (liblber) {
dlclose(liblber);
liblber=NULL;
}
#endif
}
static dynafunc DynaGetFunction(const char *name)
{
dynafunc func = (dynafunc)NULL;
#if defined(HAVE_DLOPEN) || defined(HAVE_LIBDL)
if (libldap) {
func = (dynafunc) dlsym(libldap, name);
}
#endif
return func;
}
/***********************************************************************
*/
typedef struct ldap_url_desc {
struct ldap_url_desc *lud_next;
char *lud_scheme;
char *lud_host;
int lud_port;
char *lud_dn;
char **lud_attrs;
int lud_scope;
char *lud_filter;
char **lud_exts;
int lud_crit_exts;
} LDAPURLDesc;
CURLcode Curl_ldap(struct connectdata *conn)
{
CURLcode status = CURLE_OK;
int rc;
void *(*ldap_init)(char *, int);
int (*ldap_simple_bind_s)(void *, char *, char *);
int (*ldap_unbind_s)(void *);
int (*ldap_url_parse)(char *, LDAPURLDesc **);
void (*ldap_free_urldesc)(void *);
int (*ldap_search_s)(void *, char *, int, char *, char **, int, void **);
int (*ldap_search_st)(void *, char *, int, char *, char **, int, void *, void **);
void *(*ldap_first_entry)(void *, void *);
void *(*ldap_next_entry)(void *, void *);
char *(*ldap_err2string)(int);
char *(*ldap_get_dn)(void *, void *);
char *(*ldap_first_attribute)(void *, void *, void **);
char *(*ldap_next_attribute)(void *, void *, void *);
char **(*ldap_get_values)(void *, void *, char *);
void (*ldap_value_free)(char **);
void (*ldap_memfree)(void *);
void (*ber_free)(void *, int);
void *server;
LDAPURLDesc *ludp;
void *result;
void *entryIterator;
void *ber;
void *attribute;
struct SessionHandle *data=conn->data;
infof(data, "LDAP: %s\n", data->change.url);
DynaOpen();
if (libldap == NULL) {
failf(data, "The needed LDAP library/libraries couldn't be opened");
return CURLE_LIBRARY_NOT_FOUND;
}
/* The types are needed because ANSI C distinguishes between
* pointer-to-object (data) and pointer-to-function.
*/
DYNA_GET_FUNCTION(void *(*)(char *, int), ldap_init);
DYNA_GET_FUNCTION(int (*)(void *, char *, char *), ldap_simple_bind_s);
DYNA_GET_FUNCTION(int (*)(void *), ldap_unbind_s);
DYNA_GET_FUNCTION(int (*)(char *, LDAPURLDesc **), ldap_url_parse);
DYNA_GET_FUNCTION(void (*)(void *), ldap_free_urldesc);
DYNA_GET_FUNCTION(int (*)(void *, char *, int, char *, char **, int, void **), ldap_search_s);
DYNA_GET_FUNCTION(int (*)(void *, char *, int, char *, char **, int, void *, void **), ldap_search_st);
DYNA_GET_FUNCTION(void *(*)(void *, void *), ldap_first_entry);
DYNA_GET_FUNCTION(void *(*)(void *, void *), ldap_next_entry);
DYNA_GET_FUNCTION(char *(*)(int), ldap_err2string);
DYNA_GET_FUNCTION(char *(*)(void *, void *), ldap_get_dn);
DYNA_GET_FUNCTION(char *(*)(void *, void *, void **), ldap_first_attribute);
DYNA_GET_FUNCTION(char *(*)(void *, void *, void *), ldap_next_attribute);
DYNA_GET_FUNCTION(char **(*)(void *, void *, char *), ldap_get_values);
DYNA_GET_FUNCTION(void (*)(char **), ldap_value_free);
DYNA_GET_FUNCTION(void (*)(void *), ldap_memfree);
DYNA_GET_FUNCTION(void (*)(void *, int), ber_free);
server = ldap_init(conn->hostname, conn->port);
if (server == NULL) {
failf(data, "LDAP: Cannot connect to %s:%d",
conn->hostname, conn->port);
status = CURLE_COULDNT_CONNECT;
}
else {
rc = ldap_simple_bind_s(server,
conn->bits.user_passwd?conn->user:NULL,
conn->bits.user_passwd?conn->passwd:NULL);
if (rc != 0) {
failf(data, "LDAP: %s", ldap_err2string(rc));
status = CURLE_LDAP_CANNOT_BIND;
}
else {
rc = ldap_url_parse(data->change.url, &ludp);
if (rc != 0) {
failf(data, "LDAP: %s", ldap_err2string(rc));
status = CURLE_LDAP_INVALID_URL;
}
else {
rc = ldap_search_s(server, ludp->lud_dn, ludp->lud_scope,
ludp->lud_filter, ludp->lud_attrs, 0, &result);
if (rc != 0) {
failf(data, "LDAP: %s", ldap_err2string(rc));
status = CURLE_LDAP_SEARCH_FAILED;
}
else {
for (entryIterator = ldap_first_entry(server, result);
entryIterator;
entryIterator = ldap_next_entry(server, entryIterator)) {
char *dn = ldap_get_dn(server, entryIterator);
char **vals;
int i;
Curl_client_write(data, CLIENTWRITE_BODY, (char *)"DN: ", 4);
Curl_client_write(data, CLIENTWRITE_BODY, dn, 0);
Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
for(attribute = ldap_first_attribute(server, entryIterator,
&ber);
attribute;
attribute = ldap_next_attribute(server, entryIterator,
ber) ) {
vals = ldap_get_values(server, entryIterator, attribute);
if (vals != NULL) {
for(i = 0; (vals[i] != NULL); i++) {
Curl_client_write(data, CLIENTWRITE_BODY, (char*)"\t", 1);
Curl_client_write(data, CLIENTWRITE_BODY, attribute, 0);
Curl_client_write(data, CLIENTWRITE_BODY, (char *)": ", 2);
Curl_client_write(data, CLIENTWRITE_BODY, vals[i], 0);
Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 0);
}
}
/* Free memory used to store values */
ldap_value_free(vals);
}
Curl_client_write(data, CLIENTWRITE_BODY, (char *)"\n", 1);
ldap_memfree(attribute);
ldap_memfree(dn);
if (ber) ber_free(ber, 0);
}
}
ldap_free_urldesc(ludp);
}
ldap_unbind_s(server);
}
}
DynaClose();
/* no data to transfer */
Curl_Transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
return status;
}
#endif
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