| 1 |
/*
|
| 2 |
+----------------------------------------------------------------------+
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| caching: functions for caching mechanism |
|
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+----------------------------------------------------------------------+
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| Copyright (c) 2006-2007 Helmut K. C. Tessarek |
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+----------------------------------------------------------------------+
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| Licensed under the Apache License, Version 2.0 (the "License"); you |
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| 8 |
| may not use this file except in compliance with the License. You may |
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| 9 |
| obtain a copy of the License at |
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| 10 |
| http://www.apache.org/licenses/LICENSE-2.0 |
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| 11 |
| |
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| 12 |
| Unless required by applicable law or agreed to in writing, software |
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| distributed under the License is distributed on an "AS IS" BASIS, |
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| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
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| 15 |
| implied. See the License for the specific language governing |
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| 16 |
| permissions and limitations under the License. |
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| 17 |
+----------------------------------------------------------------------+
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| 18 |
| Author: Helmut K. C. Tessarek |
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+----------------------------------------------------------------------+
|
| 20 |
| Website: http://mod-auth-ibmdb2.sourceforge.net |
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| 21 |
+----------------------------------------------------------------------+
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| 22 |
*/
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/* $Id: caching.h,v 1.5 2007/03/21 21:39:22 tessus Exp $ */
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|
| 26 |
#ifndef CACHING_H
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| 27 |
#define CACHING_H
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| 28 |
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| 29 |
#include "apr_general.h"
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| 30 |
#include "apr_dbm.h"
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| 31 |
#include "apr_time.h"
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| 32 |
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| 33 |
typedef struct {
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char password[MAX_PWD_LENGTH];
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apr_time_t timestamp;
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| 36 |
} cached_password_timestamp;
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| 38 |
typedef struct {
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int numgrps;
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apr_time_t timestamp;
|
| 41 |
} cached_group_timestamp;
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| 42 |
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| 43 |
static int write_cache( request_rec *r, const char *user, const char *password, authn_ibmdb2_config_t *m );
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| 44 |
static char *read_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m );
|
| 45 |
static int write_group_cache( request_rec *r, const char *user, const char **grplist, authn_ibmdb2_config_t *m );
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static char **read_group_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m );
|
| 47 |
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| 48 |
/*
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| 49 |
function to store the user credentials in the local cache, so that subsequent
|
| 50 |
http requests can validate the user directly from local cache without the need
|
| 51 |
to query the backend db2 database.
|
| 52 |
*/
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| 53 |
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| 54 |
/* {{{ static int write_cache( request_rec *r, const char *user, const char *password, authn_ibmdb2_config_t *m )
|
| 55 |
*/
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| 56 |
static int write_cache( request_rec *r, const char *user, const char *password, authn_ibmdb2_config_t *m )
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| 57 |
{
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| 58 |
apr_status_t rc;
|
| 59 |
apr_pool_t *pool;
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apr_dbm_t *db;
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char errmsg[MAXERRLEN];
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int rc_write_cache = 0;
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char *my_user = (char *)user;
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apr_datum_t datum_user = { my_user, (strlen( my_user )+1) };
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cached_password_timestamp cpt;
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apr_datum_t datum_value;
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char *my_password = (char *)password;
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strcpy(cpt.password, my_password);
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if( !(cpt.timestamp = apr_time_now()) )
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "unable to determine current time (write cache)");
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LOG_ERROR( errmsg );
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return( 1 );
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}
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datum_value.dptr = (void *)&cpt;
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datum_value.dsize = sizeof(cpt);
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apr_pool_create( &pool, NULL );
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rc = apr_dbm_open(&db, m->ibmdb2cachefile, APR_DBM_RWCREATE, APR_FPROT_UREAD | APR_FPROT_UWRITE, pool);
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if ( rc == APR_SUCCESS )
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "storing user [%s] and pass [%s] in cache", my_user, my_password);
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LOG_DBG( errmsg );
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if( (rc = apr_dbm_store(db, datum_user, datum_value)) != APR_SUCCESS )
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "unable to store user [%s] in cache", my_user);
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LOG_DBG( errmsg );
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errmsg[0] = '\0';
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apr_strerror( rc, errmsg, sizeof(errmsg) );
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LOG_DBG( errmsg );
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rc_write_cache = 1;
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}
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apr_dbm_close( db );
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}
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else
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "could not open cachefile [%s] for writing", m->ibmdb2cachefile );
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LOG_ERROR( errmsg );
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errmsg[0] = '\0';
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apr_strerror( rc, errmsg, sizeof(errmsg) );
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LOG_DBG( errmsg );
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rc_write_cache = 1;
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}
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apr_pool_destroy( pool );
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return( rc_write_cache );
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}
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/* }}} */
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/*
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function to check in the local cache to validate user, otherwise
|
| 129 |
we need to query the backend db2 database.
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*/
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/* {{{ static char *read_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m )
|
| 133 |
*/
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static char *read_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m )
|
| 135 |
{
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apr_status_t rc;
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apr_pool_t *pool;
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apr_dbm_t *db;
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char errmsg[MAXERRLEN];
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char *my_user = (char *)user;
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apr_datum_t datum_user = { my_user, (strlen( my_user )+1) };
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cached_password_timestamp cpt;
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apr_time_t current_time;
|
| 146 |
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apr_datum_t datum_value;
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char *pw = NULL;
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int MAXAGE = atoi( m->ibmdb2cachelifetime );
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apr_time_t time_diff;
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apr_pool_create( &pool, NULL );
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rc = apr_dbm_open(&db, m->ibmdb2cachefile, APR_DBM_RWCREATE, APR_FPROT_UREAD | APR_FPROT_UWRITE, pool);
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if( rc == APR_SUCCESS )
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{
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rc = apr_dbm_fetch( db, datum_user, &datum_value );
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if( rc == APR_SUCCESS )
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{
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if( datum_value.dsize != sizeof(cpt) )
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "we found our user in the cache but with corrupted record: %s \n", my_user);
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LOG_ERROR( errmsg );
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apr_dbm_close( db );
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apr_pool_destroy( pool );
|
| 173 |
|
| 174 |
return NULL;
|
| 175 |
}
|
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else
|
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{
|
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memcpy((void *)&cpt, datum_value.dptr, datum_value.dsize);
|
| 179 |
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if( !(current_time = apr_time_now()) )
|
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{
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errmsg[0] = '\0';
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sprintf( errmsg, "unable to determine current time (read cache)");
|
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LOG_ERROR( errmsg );
|
| 185 |
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| 186 |
apr_dbm_close( db );
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| 187 |
apr_pool_destroy( pool );
|
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|
| 189 |
return NULL;
|
| 190 |
}
|
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| 192 |
time_diff = current_time - cpt.timestamp;
|
| 193 |
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| 194 |
if( apr_time_sec(time_diff) > MAXAGE )
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{
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| 196 |
errmsg[0] = '\0';
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| 197 |
sprintf( errmsg, "cached password for user [%s] is toooo old", my_user);
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LOG_DBG( errmsg );
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| 199 |
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| 200 |
apr_dbm_close( db );
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| 201 |
apr_pool_destroy( pool );
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| 202 |
|
| 203 |
return NULL;
|
| 204 |
}
|
| 205 |
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| 206 |
pw = cpt.password;
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| 207 |
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| 208 |
/* Congratulations, we have a fresh cached entry */
|
| 209 |
errmsg[0] = '\0';
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sprintf( errmsg, "user [%s] - [%s] found in cache", my_user, pw);
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| 211 |
LOG_DBG( errmsg );
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| 212 |
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| 213 |
apr_dbm_close( db );
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| 214 |
apr_pool_destroy( pool );
|
| 215 |
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| 216 |
return pw;
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| 217 |
}
|
| 218 |
}
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| 219 |
else
|
| 220 |
{
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| 221 |
/* Did not find user in the cache */
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errmsg[0] = '\0';
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| 223 |
sprintf( errmsg, "user [%s] not found in cache", my_user);
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LOG_DBG( errmsg );
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apr_dbm_close( db );
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apr_pool_destroy( pool );
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| 228 |
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| 229 |
return NULL;
|
| 230 |
}
|
| 231 |
}
|
| 232 |
else
|
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{
|
| 234 |
errmsg[0] = '\0';
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sprintf( errmsg, "could not open cachefile [%s] for reading", m->ibmdb2cachefile );
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| 236 |
LOG_ERROR( errmsg );
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| 237 |
errmsg[0] = '\0';
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| 238 |
apr_strerror( rc, errmsg, sizeof(errmsg) );
|
| 239 |
LOG_DBG( errmsg );
|
| 240 |
|
| 241 |
apr_pool_destroy( pool );
|
| 242 |
return NULL;
|
| 243 |
}
|
| 244 |
}
|
| 245 |
/* }}} */
|
| 246 |
|
| 247 |
/*
|
| 248 |
function to store the group information in the local cache, so that subsequent
|
| 249 |
http requests can validate the groups directly from local cache without the need
|
| 250 |
to query the backend db2 database.
|
| 251 |
*/
|
| 252 |
|
| 253 |
/* {{{ static int write_group_cache( request_rec *r, const char *user, const char **grplist, authn_ibmdb2_config_t *m )
|
| 254 |
*/
|
| 255 |
static int write_group_cache( request_rec *r, const char *user, const char **grplist, authn_ibmdb2_config_t *m )
|
| 256 |
{
|
| 257 |
apr_status_t rc;
|
| 258 |
apr_pool_t *pool;
|
| 259 |
apr_dbm_t *db;
|
| 260 |
char errmsg[MAXERRLEN];
|
| 261 |
int rc_write_group_cache = 0;
|
| 262 |
|
| 263 |
char ibmdb2grpcachefile[512];
|
| 264 |
char username[MAX_UID_LENGTH+4];
|
| 265 |
char groupname[MAX_GRP_LENGTH];
|
| 266 |
|
| 267 |
int i = 0;
|
| 268 |
|
| 269 |
char *my_user = (char *)user;
|
| 270 |
apr_datum_t datum_user = { my_user, (strlen( my_user )+1) };
|
| 271 |
|
| 272 |
cached_group_timestamp cgt;
|
| 273 |
|
| 274 |
apr_datum_t datum_value;
|
| 275 |
apr_datum_t key_data;
|
| 276 |
apr_datum_t data_data;
|
| 277 |
|
| 278 |
sprintf( ibmdb2grpcachefile, "%s.grp", m->ibmdb2cachefile );
|
| 279 |
|
| 280 |
if( !(cgt.timestamp = apr_time_now()) )
|
| 281 |
{
|
| 282 |
errmsg[0] = '\0';
|
| 283 |
sprintf( errmsg, "unable to determine current time (write group cache)");
|
| 284 |
LOG_ERROR( errmsg );
|
| 285 |
return( 1 );
|
| 286 |
}
|
| 287 |
|
| 288 |
while( grplist[i] )
|
| 289 |
{
|
| 290 |
++i;
|
| 291 |
}
|
| 292 |
|
| 293 |
cgt.numgrps = i;
|
| 294 |
|
| 295 |
datum_value.dptr = (void *)&cgt;
|
| 296 |
datum_value.dsize = sizeof(cgt);
|
| 297 |
|
| 298 |
apr_pool_create( &pool, NULL );
|
| 299 |
|
| 300 |
rc = apr_dbm_open(&db, ibmdb2grpcachefile, APR_DBM_RWCREATE, APR_FPROT_UREAD | APR_FPROT_UWRITE, pool);
|
| 301 |
|
| 302 |
if( rc == APR_SUCCESS )
|
| 303 |
{
|
| 304 |
if( (rc = apr_dbm_store(db, datum_user, datum_value)) != APR_SUCCESS )
|
| 305 |
{
|
| 306 |
errmsg[0] = '\0';
|
| 307 |
sprintf( errmsg, "unable to store group info for user [%s] in cache", my_user);
|
| 308 |
LOG_DBG( errmsg );
|
| 309 |
errmsg[0] = '\0';
|
| 310 |
apr_strerror( rc, errmsg, sizeof(errmsg) );
|
| 311 |
LOG_DBG( errmsg );
|
| 312 |
|
| 313 |
apr_dbm_close( db );
|
| 314 |
apr_pool_destroy( pool );
|
| 315 |
return( 1 );
|
| 316 |
}
|
| 317 |
|
| 318 |
i = 0;
|
| 319 |
|
| 320 |
while( grplist[i] )
|
| 321 |
{
|
| 322 |
key_data.dptr = NULL;
|
| 323 |
data_data.dptr = NULL;
|
| 324 |
|
| 325 |
username[0] = '\0';
|
| 326 |
sprintf( username, "%s_%d", my_user, i );
|
| 327 |
|
| 328 |
groupname[0] = '\0';
|
| 329 |
strcpy( groupname, grplist[i] );
|
| 330 |
|
| 331 |
key_data.dptr = username;
|
| 332 |
key_data.dsize = strlen(username) + 1;
|
| 333 |
|
| 334 |
data_data.dptr = groupname;
|
| 335 |
data_data.dsize = strlen(groupname) + 1;
|
| 336 |
|
| 337 |
if( (rc = apr_dbm_store(db, key_data, data_data)) != APR_SUCCESS )
|
| 338 |
{
|
| 339 |
errmsg[0] = '\0';
|
| 340 |
sprintf( errmsg, "unable to store group [%s] for user [%s] in cache", grplist[i], my_user );
|
| 341 |
LOG_DBG( errmsg );
|
| 342 |
errmsg[0] = '\0';
|
| 343 |
apr_strerror( rc, errmsg, sizeof(errmsg) );
|
| 344 |
LOG_DBG( errmsg );
|
| 345 |
|
| 346 |
apr_dbm_close( db );
|
| 347 |
apr_pool_destroy( pool );
|
| 348 |
return( 1 );
|
| 349 |
}
|
| 350 |
else
|
| 351 |
{
|
| 352 |
errmsg[0] = '\0';
|
| 353 |
sprintf( errmsg, "storing user [%s] and group [%s] in cache", my_user, grplist[i] );
|
| 354 |
LOG_DBG( errmsg );
|
| 355 |
}
|
| 356 |
|
| 357 |
++i;
|
| 358 |
}
|
| 359 |
|
| 360 |
apr_dbm_close( db );
|
| 361 |
}
|
| 362 |
else
|
| 363 |
{
|
| 364 |
errmsg[0] = '\0';
|
| 365 |
sprintf( errmsg, "could not open group cachefile [%s] for writing", ibmdb2grpcachefile );
|
| 366 |
LOG_ERROR( errmsg );
|
| 367 |
errmsg[0] = '\0';
|
| 368 |
apr_strerror( rc, errmsg, sizeof(errmsg) );
|
| 369 |
LOG_DBG( errmsg );
|
| 370 |
|
| 371 |
rc_write_group_cache = 1;
|
| 372 |
}
|
| 373 |
|
| 374 |
apr_pool_destroy( pool );
|
| 375 |
|
| 376 |
return( rc_write_group_cache );
|
| 377 |
}
|
| 378 |
/* }}} */
|
| 379 |
|
| 380 |
/*
|
| 381 |
function to check in the local cache to check if user is in a group, otherwise
|
| 382 |
we need to query the backend db2 database.
|
| 383 |
*/
|
| 384 |
|
| 385 |
/* {{{ static char **read_group_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m )
|
| 386 |
*/
|
| 387 |
static char **read_group_cache( request_rec *r, const char *user, authn_ibmdb2_config_t *m )
|
| 388 |
{
|
| 389 |
apr_status_t rc;
|
| 390 |
apr_pool_t *pool;
|
| 391 |
apr_dbm_t *db;
|
| 392 |
char errmsg[MAXERRLEN];
|
| 393 |
|
| 394 |
char ibmdb2grpcachefile[512];
|
| 395 |
char username[MAX_UID_LENGTH+4];
|
| 396 |
|
| 397 |
int i = 0;
|
| 398 |
|
| 399 |
int numgrps;
|
| 400 |
|
| 401 |
char *my_user = (char *)user;
|
| 402 |
apr_datum_t datum_user = { my_user, (strlen( my_user )+1) };
|
| 403 |
|
| 404 |
cached_group_timestamp cgt;
|
| 405 |
apr_time_t current_time;
|
| 406 |
|
| 407 |
apr_datum_t datum_value;
|
| 408 |
apr_datum_t key_data;
|
| 409 |
apr_datum_t return_data;
|
| 410 |
|
| 411 |
char **list = NULL;
|
| 412 |
|
| 413 |
int MAXAGE = atoi( m->ibmdb2cachelifetime );
|
| 414 |
|
| 415 |
apr_time_t time_diff;
|
| 416 |
|
| 417 |
sprintf( ibmdb2grpcachefile, "%s.grp", m->ibmdb2cachefile );
|
| 418 |
|
| 419 |
apr_pool_create( &pool, NULL );
|
| 420 |
|
| 421 |
rc = apr_dbm_open(&db, ibmdb2grpcachefile, APR_DBM_RWCREATE, APR_FPROT_UREAD | APR_FPROT_UWRITE, pool);
|
| 422 |
|
| 423 |
if( rc == APR_SUCCESS )
|
| 424 |
{
|
| 425 |
rc = apr_dbm_fetch( db, datum_user, &datum_value );
|
| 426 |
|
| 427 |
if( rc == APR_SUCCESS )
|
| 428 |
{
|
| 429 |
if( datum_value.dsize != sizeof(cgt) )
|
| 430 |
{
|
| 431 |
errmsg[0] = '\0';
|
| 432 |
sprintf( errmsg, "we found our user in the cache but with corrupted record: %s \n", my_user);
|
| 433 |
LOG_ERROR( errmsg );
|
| 434 |
|
| 435 |
apr_dbm_close( db );
|
| 436 |
apr_pool_destroy( pool );
|
| 437 |
|
| 438 |
return NULL;
|
| 439 |
}
|
| 440 |
else
|
| 441 |
{
|
| 442 |
memcpy((void *)&cgt, datum_value.dptr, datum_value.dsize);
|
| 443 |
|
| 444 |
if( !(current_time = apr_time_now()) )
|
| 445 |
{
|
| 446 |
errmsg[0] = '\0';
|
| 447 |
sprintf( errmsg, "unable to determine current time (read group cache)");
|
| 448 |
LOG_ERROR( errmsg );
|
| 449 |
|
| 450 |
apr_dbm_close( db );
|
| 451 |
apr_pool_destroy( pool );
|
| 452 |
|
| 453 |
return NULL;
|
| 454 |
}
|
| 455 |
|
| 456 |
time_diff = current_time - cgt.timestamp;
|
| 457 |
|
| 458 |
i = 0;
|
| 459 |
|
| 460 |
numgrps = cgt.numgrps;
|
| 461 |
|
| 462 |
if( apr_time_sec(time_diff) > MAXAGE )
|
| 463 |
{
|
| 464 |
errmsg[0] = '\0';
|
| 465 |
sprintf( errmsg, "cached group information for user [%s] toooo old", my_user);
|
| 466 |
LOG_DBG( errmsg );
|
| 467 |
|
| 468 |
apr_dbm_close( db );
|
| 469 |
apr_pool_destroy( pool );
|
| 470 |
|
| 471 |
return NULL;
|
| 472 |
}
|
| 473 |
|
| 474 |
/* Build the list to return */
|
| 475 |
|
| 476 |
list = (char **) malloc(sizeof(char *) * (numgrps+1));
|
| 477 |
|
| 478 |
for( i = 0; i < numgrps; i++ )
|
| 479 |
{
|
| 480 |
key_data.dptr = NULL;
|
| 481 |
return_data.dptr = NULL;
|
| 482 |
|
| 483 |
username[0] = '\0';
|
| 484 |
sprintf( username, "%s_%d", my_user, i );
|
| 485 |
|
| 486 |
key_data.dptr = username;
|
| 487 |
key_data.dsize = strlen(username) + 1;
|
| 488 |
|
| 489 |
rc = apr_dbm_fetch( db, key_data, &return_data );
|
| 490 |
|
| 491 |
if( rc == APR_SUCCESS )
|
| 492 |
{
|
| 493 |
list[i] = return_data.dptr;
|
| 494 |
}
|
| 495 |
}
|
| 496 |
|
| 497 |
list[i] = NULL;
|
| 498 |
|
| 499 |
/* Congratulations, we have a fresh cached entry */
|
| 500 |
errmsg[0] = '\0';
|
| 501 |
sprintf( errmsg, "groups for user [%s] found in cache", my_user);
|
| 502 |
LOG_DBG( errmsg );
|
| 503 |
|
| 504 |
apr_dbm_close( db );
|
| 505 |
apr_pool_destroy( pool );
|
| 506 |
|
| 507 |
return list;
|
| 508 |
}
|
| 509 |
}
|
| 510 |
else
|
| 511 |
{
|
| 512 |
/* Did not find user in the group cache */
|
| 513 |
errmsg[0] = '\0';
|
| 514 |
sprintf( errmsg, "groups for user [%s] not found in cache", my_user);
|
| 515 |
LOG_DBG( errmsg );
|
| 516 |
|
| 517 |
apr_dbm_close( db );
|
| 518 |
apr_pool_destroy( pool );
|
| 519 |
|
| 520 |
return NULL;
|
| 521 |
}
|
| 522 |
}
|
| 523 |
else
|
| 524 |
{
|
| 525 |
errmsg[0] = '\0';
|
| 526 |
sprintf( errmsg, "could not open group cachefile [%s] for reading", ibmdb2grpcachefile );
|
| 527 |
LOG_ERROR( errmsg );
|
| 528 |
errmsg[0] = '\0';
|
| 529 |
apr_strerror( rc, errmsg, sizeof(errmsg) );
|
| 530 |
LOG_DBG( errmsg );
|
| 531 |
|
| 532 |
apr_pool_destroy( pool );
|
| 533 |
return NULL;
|
| 534 |
}
|
| 535 |
}
|
| 536 |
/* }}} */
|
| 537 |
|
| 538 |
#endif
|
| 539 |
|
| 540 |
/*
|
| 541 |
* Local variables:
|
| 542 |
* tab-width: 4
|
| 543 |
* c-basic-offset: 4
|
| 544 |
* End:
|
| 545 |
* vim600: noet sw=4 ts=4 fdm=marker
|
| 546 |
* vim<600: noet sw=4 ts=4
|
| 547 |
*/
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