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|
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* apr_ldap_option.c -- LDAP options
*
* The LDAP SDK allows the getting and setting of options on an LDAP
* connection.
*
*/
#include "apr.h"
#include "apu.h"
#include "apu_config.h"
#if APU_DSO_BUILD
#define APU_DSO_LDAP_BUILD
#endif
#include "apr_ldap.h"
#include "apr_errno.h"
#include "apr_pools.h"
#include "apr_strings.h"
#include "apr_tables.h"
#if APR_HAS_LDAP
static void option_set_cert(apr_pool_t *pool, LDAP *ldap, const void *invalue,
apr_ldap_err_t *result);
static void option_set_tls(apr_pool_t *pool, LDAP *ldap, const void *invalue,
apr_ldap_err_t *result);
/**
* APR LDAP get option function
*
* This function gets option values from a given LDAP session if
* one was specified.
*/
APU_DECLARE_LDAP(int) apr_ldap_get_option(apr_pool_t *pool,
LDAP *ldap,
int option,
void *outvalue,
apr_ldap_err_t **result_err)
{
apr_ldap_err_t *result;
result = apr_pcalloc(pool, sizeof(apr_ldap_err_t));
*result_err = result;
if (!result) {
return APR_ENOMEM;
}
/* get the option specified using the native LDAP function */
result->rc = ldap_get_option(ldap, option, outvalue);
/* handle the error case */
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result-> rc);
result->reason = apr_pstrdup(pool, "LDAP: Could not get an option");
return APR_EGENERAL;
}
return APR_SUCCESS;
}
/**
* APR LDAP set option function
*
* This function sets option values to a given LDAP session if
* one was specified.
*
* Where an option is not supported by an LDAP toolkit, this function
* will try and apply legacy functions to achieve the same effect,
* depending on the platform.
*/
APU_DECLARE_LDAP(int) apr_ldap_set_option(apr_pool_t *pool,
LDAP *ldap,
int option,
const void *invalue,
apr_ldap_err_t **result_err)
{
apr_ldap_err_t *result;
result = apr_pcalloc(pool, sizeof(apr_ldap_err_t));
*result_err = result;
if (!result) {
return APR_ENOMEM;
}
switch (option) {
case APR_LDAP_OPT_TLS_CERT:
option_set_cert(pool, ldap, invalue, result);
break;
case APR_LDAP_OPT_TLS:
option_set_tls(pool, ldap, invalue, result);
break;
case APR_LDAP_OPT_VERIFY_CERT:
#if APR_HAS_NETSCAPE_LDAPSDK || APR_HAS_SOLARIS_LDAPSDK || APR_HAS_MOZILLA_LDAPSK
result->reason = "LDAP: Verify certificate not yet supported by APR on the "
"Netscape, Solaris or Mozilla LDAP SDKs";
result->rc = -1;
return APR_EGENERAL;
#endif
#if APR_HAS_NOVELL_LDAPSDK
if (*((int*)invalue)) {
result->rc = ldapssl_set_verify_mode(LDAPSSL_VERIFY_SERVER);
}
else {
result->rc = ldapssl_set_verify_mode(LDAPSSL_VERIFY_NONE);
}
#endif
#if APR_HAS_OPENLDAP_LDAPSDK
#ifdef LDAP_OPT_X_TLS
/* This is not a per-connection setting so just pass NULL for the
Ldap connection handle */
if (*((int*)invalue)) {
int i = LDAP_OPT_X_TLS_DEMAND;
result->rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &i);
}
else {
int i = LDAP_OPT_X_TLS_NEVER;
result->rc = ldap_set_option(NULL, LDAP_OPT_X_TLS_REQUIRE_CERT, &i);
}
#else
result->reason = "LDAP: SSL/TLS not yet supported by APR on this "
"version of the OpenLDAP toolkit";
result->rc = -1;
return APR_EGENERAL;
#endif
#endif
/* handle the error case */
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not set verify mode";
}
break;
case APR_LDAP_OPT_REFERRALS:
/* Setting this option is supported on at least TIVOLI_SDK and OpenLDAP. Folks
* who know the NOVELL, NETSCAPE, MOZILLA, and SOLARIS SDKs should note here if
* the SDK at least tolerates this option being set, or add an elif to handle
* special cases (i.e. different LDAP_OPT_X value).
*/
result->rc = ldap_set_option(ldap, LDAP_OPT_REFERRALS, (void *)invalue);
if (result->rc != LDAP_SUCCESS) {
result->reason = "Unable to set LDAP_OPT_REFERRALS.";
return(result->rc);
}
break;
case APR_LDAP_OPT_REFHOPLIMIT:
#if !defined(LDAP_OPT_REFHOPLIMIT) || APR_HAS_NOVELL_LDAPSDK
/* If the LDAP_OPT_REFHOPLIMIT symbol is missing, assume that the
* particular LDAP library has a reasonable default. So far certain
* versions of the OpenLDAP SDK miss this symbol (but default to 5),
* and the Microsoft SDK misses the symbol (the default is not known).
*/
result->rc = LDAP_SUCCESS;
#else
/* Setting this option is supported on at least TIVOLI_SDK. Folks who know
* the NOVELL, NETSCAPE, MOZILLA, and SOLARIS SDKs should note here if
* the SDK at least tolerates this option being set, or add an elif to handle
* special cases so an error isn't returned if there is a perfectly good
* default value that just can't be changed (like openLDAP).
*/
result->rc = ldap_set_option(ldap, LDAP_OPT_REFHOPLIMIT, (void *)invalue);
#endif
if (result->rc != LDAP_SUCCESS) {
result->reason = "Unable to set LDAP_OPT_REFHOPLIMIT.";
return(result->rc);
}
break;
default:
/* set the option specified using the native LDAP function */
result->rc = ldap_set_option(ldap, option, (void *)invalue);
/* handle the error case */
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not set an option";
}
break;
}
/* handle the error case */
if (result->rc != LDAP_SUCCESS) {
return APR_EGENERAL;
}
return APR_SUCCESS;
}
/**
* Handle APR_LDAP_OPT_TLS
*
* This function sets the type of TLS to be applied to this connection.
* The options are:
* APR_LDAP_NONE: no encryption
* APR_LDAP_SSL: SSL encryption (ldaps://)
* APR_LDAP_STARTTLS: STARTTLS encryption
* APR_LDAP_STOPTLS: Stop existing TLS connecttion
*/
static void option_set_tls(apr_pool_t *pool, LDAP *ldap, const void *invalue,
apr_ldap_err_t *result)
{
#if APR_HAS_LDAP_SSL /* compiled with ssl support */
int tls = * (const int *)invalue;
/* Netscape/Mozilla/Solaris SDK */
#if APR_HAS_NETSCAPE_LDAPSDK || APR_HAS_SOLARIS_LDAPSDK || APR_HAS_MOZILLA_LDAPSK
#if APR_HAS_LDAPSSL_INSTALL_ROUTINES
if (tls == APR_LDAP_SSL) {
result->rc = ldapssl_install_routines(ldap);
#ifdef LDAP_OPT_SSL
/* apparently Netscape and Mozilla need this too, Solaris doesn't */
if (result->rc == LDAP_SUCCESS) {
result->rc = ldap_set_option(ldap, LDAP_OPT_SSL, LDAP_OPT_ON);
}
#endif
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not switch SSL on for this "
"connection.";
}
}
else if (tls == APR_LDAP_STARTTLS) {
result->reason = "LDAP: STARTTLS is not supported by the "
"Netscape/Mozilla/Solaris SDK";
result->rc = -1;
}
else if (tls == APR_LDAP_STOPTLS) {
result->reason = "LDAP: STOPTLS is not supported by the "
"Netscape/Mozilla/Solaris SDK";
result->rc = -1;
}
#else
if (tls != APR_LDAP_NONE) {
result->reason = "LDAP: SSL/TLS is not supported by this version "
"of the Netscape/Mozilla/Solaris SDK";
result->rc = -1;
}
#endif
#endif
/* Novell SDK */
#if APR_HAS_NOVELL_LDAPSDK
/* ldapssl_install_routines(ldap)
* Behavior is unpredictable when other LDAP functions are called
* between the ldap_init function and the ldapssl_install_routines
* function.
*
* STARTTLS is supported by the ldap_start_tls_s() method
*/
if (tls == APR_LDAP_SSL) {
result->rc = ldapssl_install_routines(ldap);
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not switch SSL on for this "
"connection.";
}
}
if (tls == APR_LDAP_STARTTLS) {
result->rc = ldapssl_start_tls(ldap);
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not start TLS on this connection";
}
}
else if (tls == APR_LDAP_STOPTLS) {
result->rc = ldapssl_stop_tls(ldap);
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result->rc);
result->reason = "LDAP: Could not stop TLS on this connection";
}
}
#endif
/* OpenLDAP SDK */
#if APR_HAS_OPENLDAP_LDAPSDK
#ifdef LDAP_OPT_X_TLS
if (tls == APR_LDAP_SSL) {
int SSLmode = LDAP_OPT_X_TLS_HARD;
result->rc = ldap_set_option(ldap, LDAP_OPT_X_TLS, &SSLmode);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldap_set_option failed. "
"Could not set LDAP_OPT_X_TLS to "
"LDAP_OPT_X_TLS_HARD";
result->msg = ldap_err2string(result->rc);
}
}
else if (tls == APR_LDAP_STARTTLS) {
result->rc = ldap_start_tls_s(ldap, NULL, NULL);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldap_start_tls_s() failed";
result->msg = ldap_err2string(result->rc);
}
}
else if (tls == APR_LDAP_STOPTLS) {
result->reason = "LDAP: STOPTLS is not supported by the "
"OpenLDAP SDK";
result->rc = -1;
}
#else
if (tls != APR_LDAP_NONE) {
result->reason = "LDAP: SSL/TLS not yet supported by APR on this "
"version of the OpenLDAP toolkit";
result->rc = -1;
}
#endif
#endif
/* Microsoft SDK */
#if APR_HAS_MICROSOFT_LDAPSDK
if (tls == APR_LDAP_NONE) {
ULONG ul = (ULONG) LDAP_OPT_OFF;
result->rc = ldap_set_option(ldap, LDAP_OPT_SSL, &ul);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: an attempt to set LDAP_OPT_SSL off "
"failed.";
result->msg = ldap_err2string(result->rc);
}
}
else if (tls == APR_LDAP_SSL) {
ULONG ul = (ULONG) LDAP_OPT_ON;
result->rc = ldap_set_option(ldap, LDAP_OPT_SSL, &ul);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: an attempt to set LDAP_OPT_SSL on "
"failed.";
result->msg = ldap_err2string(result->rc);
}
}
#if APR_HAS_LDAP_START_TLS_S
else if (tls == APR_LDAP_STARTTLS) {
result->rc = ldap_start_tls_s(ldap, NULL, NULL, NULL, NULL);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldap_start_tls_s() failed";
result->msg = ldap_err2string(result->rc);
}
}
else if (tls == APR_LDAP_STOPTLS) {
result->rc = ldap_stop_tls_s(ldap);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldap_stop_tls_s() failed";
result->msg = ldap_err2string(result->rc);
}
}
#endif
#endif
#if APR_HAS_OTHER_LDAPSDK
if (tls != APR_LDAP_NONE) {
result->reason = "LDAP: SSL/TLS is currently not supported by "
"APR on this LDAP SDK";
result->rc = -1;
}
#endif
#endif /* APR_HAS_LDAP_SSL */
}
/**
* Handle APR_LDAP_OPT_TLS_CACERTFILE
*
* This function sets the CA certificate for further SSL/TLS connections.
*
* The file provided are in different formats depending on the toolkit used:
*
* Netscape: cert7.db file
* Novell: PEM or DER
* OpenLDAP: PEM (others supported?)
* Microsoft: unknown
* Solaris: unknown
*/
static void option_set_cert(apr_pool_t *pool, LDAP *ldap,
const void *invalue, apr_ldap_err_t *result)
{
#if APR_HAS_LDAP_SSL
#if APR_HAS_LDAPSSL_CLIENT_INIT || APR_HAS_OPENLDAP_LDAPSDK
apr_array_header_t *certs = (apr_array_header_t *)invalue;
struct apr_ldap_opt_tls_cert_t *ents = (struct apr_ldap_opt_tls_cert_t *)certs->elts;
int i = 0;
#endif
/* Netscape/Mozilla/Solaris SDK */
#if APR_HAS_NETSCAPE_LDAPSDK || APR_HAS_SOLARIS_LDAPSDK || APR_HAS_MOZILLA_LDAPSDK
#if APR_HAS_LDAPSSL_CLIENT_INIT
const char *nickname = NULL;
const char *secmod = NULL;
const char *key3db = NULL;
const char *cert7db = NULL;
const char *password = NULL;
/* set up cert7.db, key3.db and secmod parameters */
for (i = 0; i < certs->nelts; i++) {
switch (ents[i].type) {
case APR_LDAP_CA_TYPE_CERT7_DB:
cert7db = ents[i].path;
break;
case APR_LDAP_CA_TYPE_SECMOD:
secmod = ents[i].path;
break;
case APR_LDAP_CERT_TYPE_KEY3_DB:
key3db = ents[i].path;
break;
case APR_LDAP_CERT_TYPE_NICKNAME:
nickname = ents[i].path;
password = ents[i].password;
break;
default:
result->rc = -1;
result->reason = "LDAP: The Netscape/Mozilla LDAP SDK only "
"understands the CERT7, KEY3 and SECMOD "
"file types.";
break;
}
if (result->rc != LDAP_SUCCESS) {
break;
}
}
/* actually set the certificate parameters */
if (result->rc == LDAP_SUCCESS) {
if (nickname) {
result->rc = ldapssl_enable_clientauth(ldap, "",
(char *)password,
(char *)nickname);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: could not set client certificate: "
"ldapssl_enable_clientauth() failed.";
result->msg = ldap_err2string(result->rc);
}
}
else if (secmod) {
result->rc = ldapssl_advclientauth_init(cert7db, NULL,
key3db ? 1 : 0, key3db, NULL,
1, secmod, LDAPSSL_AUTH_CNCHECK);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldapssl_advclientauth_init() failed.";
result->msg = ldap_err2string(result->rc);
}
}
else if (key3db) {
result->rc = ldapssl_clientauth_init(cert7db, NULL,
1, key3db, NULL);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldapssl_clientauth_init() failed.";
result->msg = ldap_err2string(result->rc);
}
}
else {
result->rc = ldapssl_client_init(cert7db, NULL);
if (result->rc != LDAP_SUCCESS) {
result->reason = "LDAP: ldapssl_client_init() failed.";
result->msg = ldap_err2string(result->rc);
}
}
}
#else
result->reason = "LDAP: SSL/TLS ldapssl_client_init() function not "
"supported by this Netscape/Mozilla/Solaris SDK. "
"Certificate authority file not set";
result->rc = -1;
#endif
#endif
/* Novell SDK */
#if APR_HAS_NOVELL_LDAPSDK
#if APR_HAS_LDAPSSL_CLIENT_INIT && APR_HAS_LDAPSSL_ADD_TRUSTED_CERT && APR_HAS_LDAPSSL_CLIENT_DEINIT
/* The Novell library cannot support per connection certificates. Error
* out if the ldap handle is provided.
*/
if (ldap) {
result->rc = -1;
result->reason = "LDAP: The Novell LDAP SDK cannot support the setting "
"of certificates or keys on a per connection basis.";
}
/* Novell's library needs to be initialised first */
else {
result->rc = ldapssl_client_init(NULL, NULL);
if (result->rc != LDAP_SUCCESS) {
result->msg = ldap_err2string(result-> rc);
result->reason = apr_pstrdup(pool, "LDAP: Could not "
"initialize SSL");
}
}
/* set one or more certificates */
for (i = 0; LDAP_SUCCESS == result->rc && i < certs->nelts; i++) {
/* Novell SDK supports DER or BASE64 files. */
switch (ents[i].type) {
case APR_LDAP_CA_TYPE_DER:
result->rc = ldapssl_add_trusted_cert((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_DER);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_CA_TYPE_BASE64:
result->rc = ldapssl_add_trusted_cert((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_B64);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_CERT_TYPE_DER:
result->rc = ldapssl_set_client_cert((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_DER,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_CERT_TYPE_BASE64:
result->rc = ldapssl_set_client_cert((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_B64,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_CERT_TYPE_PFX:
result->rc = ldapssl_set_client_cert((void *)ents[i].path,
LDAPSSL_FILETYPE_P12,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_KEY_TYPE_DER:
result->rc = ldapssl_set_client_private_key((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_DER,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_KEY_TYPE_BASE64:
result->rc = ldapssl_set_client_private_key((void *)ents[i].path,
LDAPSSL_CERT_FILETYPE_B64,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_KEY_TYPE_PFX:
result->rc = ldapssl_set_client_private_key((void *)ents[i].path,
LDAPSSL_FILETYPE_P12,
(void*)ents[i].password);
result->msg = ldap_err2string(result->rc);
break;
default:
result->rc = -1;
result->reason = "LDAP: The Novell LDAP SDK only understands the "
"DER and PEM (BASE64) file types.";
break;
}
if (result->rc != LDAP_SUCCESS) {
break;
}
}
#else
result->reason = "LDAP: ldapssl_client_init(), "
"ldapssl_add_trusted_cert() or "
"ldapssl_client_deinit() functions not supported "
"by this Novell SDK. Certificate authority file "
"not set";
result->rc = -1;
#endif
#endif
/* OpenLDAP SDK */
#if APR_HAS_OPENLDAP_LDAPSDK
#ifdef LDAP_OPT_X_TLS_CACERTFILE
/* set one or more certificates */
/* FIXME: make it support setting directories as well as files */
for (i = 0; i < certs->nelts; i++) {
/* OpenLDAP SDK supports BASE64 files. */
switch (ents[i].type) {
case APR_LDAP_CA_TYPE_BASE64:
result->rc = ldap_set_option(ldap, LDAP_OPT_X_TLS_CACERTFILE,
(void *)ents[i].path);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_CERT_TYPE_BASE64:
result->rc = ldap_set_option(ldap, LDAP_OPT_X_TLS_CERTFILE,
(void *)ents[i].path);
result->msg = ldap_err2string(result->rc);
break;
case APR_LDAP_KEY_TYPE_BASE64:
result->rc = ldap_set_option(ldap, LDAP_OPT_X_TLS_KEYFILE,
(void *)ents[i].path);
result->msg = ldap_err2string(result->rc);
break;
#ifdef LDAP_OPT_X_TLS_CACERTDIR
case APR_LDAP_CA_TYPE_CACERTDIR_BASE64:
result->rc = ldap_set_option(ldap, LDAP_OPT_X_TLS_CACERTDIR,
(void *)ents[i].path);
result->msg = ldap_err2string(result->rc);
break;
#endif
default:
result->rc = -1;
result->reason = "LDAP: The OpenLDAP SDK only understands the "
"PEM (BASE64) file type.";
break;
}
if (result->rc != LDAP_SUCCESS) {
break;
}
}
#else
result->reason = "LDAP: LDAP_OPT_X_TLS_CACERTFILE not "
"defined by this OpenLDAP SDK. Certificate "
"authority file not set";
result->rc = -1;
#endif
#endif
/* Microsoft SDK */
#if APR_HAS_MICROSOFT_LDAPSDK
/* Microsoft SDK use the registry certificate store - error out
* here with a message explaining this. */
result->reason = "LDAP: CA certificates cannot be set using this method, "
"as they are stored in the registry instead.";
result->rc = -1;
#endif
/* SDK not recognised */
#if APR_HAS_OTHER_LDAPSDK
result->reason = "LDAP: LDAP_OPT_X_TLS_CACERTFILE not "
"defined by this LDAP SDK. Certificate "
"authority file not set";
result->rc = -1;
#endif
#else /* not compiled with SSL Support */
result->reason = "LDAP: Attempt to set certificate(s) failed. "
"Not built with SSL support";
result->rc = -1;
#endif /* APR_HAS_LDAP_SSL */
}
#endif /* APR_HAS_LDAP */
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