git.sur5r.net Git - openldap/blob - servers/slapd/overlays/ppolicy.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 2004-2009 The OpenLDAP Foundation.
   5  * Portions Copyright 2004-2005 Howard Chu, Symas Corporation.
   6  * Portions Copyright 2004 Hewlett-Packard Company.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was developed by Howard Chu for inclusion in
  19  * OpenLDAP Software, based on prior work by Neil Dunbar (HP).
  20  * This work was sponsored by the Hewlett-Packard Company.
  21  */
  22
  23 #include "portable.h"
  24
  25 /* This file implements "Password Policy for LDAP Directories",
  26  * based on draft behera-ldap-password-policy-09
  27  */
  28
  29 #ifdef SLAPD_OVER_PPOLICY
  30
  31 #include <ldap.h>
  32 #include "lutil.h"
  33 #include "slap.h"
  34 #ifdef SLAPD_MODULES
  35 #define LIBLTDL_DLL_IMPORT      /* Win32: don't re-export libltdl's symbols */
  36 #include <ltdl.h>
  37 #endif
  38 #include <ac/errno.h>
  39 #include <ac/time.h>
  40 #include <ac/string.h>
  41 #include <ac/ctype.h>
  42 #include "config.h"
  43
  44 #ifndef MODULE_NAME_SZ
  45 #define MODULE_NAME_SZ 256
  46 #endif
  47
  48 /* Per-instance configuration information */
  49 typedef struct pp_info {
  50         struct berval def_policy;       /* DN of default policy subentry */
  51         int use_lockout;                /* send AccountLocked result? */
  52         int hash_passwords;             /* transparently hash cleartext pwds */
  53         int forward_updates;    /* use frontend for policy state updates */
  54 } pp_info;
  55
  56 /* Our per-connection info - note, it is not per-instance, it is
  57  * used by all instances
  58  */
  59 typedef struct pw_conn {
  60         struct berval dn;       /* DN of restricted user */
  61 } pw_conn;
  62
  63 static pw_conn *pwcons;
  64 static int ppolicy_cid;
  65 static int ov_count;
  66
  67 typedef struct pass_policy {
  68         AttributeDescription *ad; /* attribute to which the policy applies */
  69         int pwdMinAge; /* minimum time (seconds) until passwd can change */
  70         int pwdMaxAge; /* time in seconds until pwd will expire after change */
  71         int pwdInHistory; /* number of previous passwords kept */
  72         int pwdCheckQuality; /* 0 = don't check quality, 1 = check if possible,
  73                                                    2 = check mandatory; fail if not possible */
  74         int pwdMinLength; /* minimum number of chars in password */
  75         int pwdExpireWarning; /* number of seconds that warning controls are
  76                                                         sent before a password expires */
  77         int pwdGraceAuthNLimit; /* number of times you can log in with an
  78                                                         expired password */
  79         int pwdLockout; /* 0 = do not lockout passwords, 1 = lock them out */
  80         int pwdLockoutDuration; /* time in seconds a password is locked out for */
  81         int pwdMaxFailure; /* number of failed binds allowed before lockout */
  82         int pwdFailureCountInterval; /* number of seconds before failure
  83                                                                         counts are zeroed */
  84         int pwdMustChange; /* 0 = users can use admin set password
  85                                                         1 = users must change password after admin set */
  86         int pwdAllowUserChange; /* 0 = users cannot change their passwords
  87                                                                 1 = users can change them */
  88         int pwdSafeModify; /* 0 = old password doesn't need to come
  89                                                                 with password change request
  90                                                         1 = password change must supply existing pwd */
  91         char pwdCheckModule[MODULE_NAME_SZ]; /* name of module to dynamically
  92                                                                                     load to check password */
  93 } PassPolicy;
  94
  95 typedef struct pw_hist {
  96         time_t t;       /* timestamp of history entry */
  97         struct berval pw;       /* old password hash */
  98         struct berval bv;       /* text of entire entry */
  99         struct pw_hist *next;
 100 } pw_hist;
 101
 102 /* Operational attributes */
 103 static AttributeDescription *ad_pwdChangedTime, *ad_pwdAccountLockedTime,
 104         *ad_pwdFailureTime, *ad_pwdHistory, *ad_pwdGraceUseTime, *ad_pwdReset,
 105         *ad_pwdPolicySubentry;
 106
 107 static struct schema_info {
 108         char *def;
 109         AttributeDescription **ad;
 110 } pwd_OpSchema[] = {
 111         {       "( 1.3.6.1.4.1.42.2.27.8.1.16 "
 112                 "NAME ( 'pwdChangedTime' ) "
 113                 "DESC 'The time the password was last changed' "
 114                 "EQUALITY generalizedTimeMatch "
 115                 "ORDERING generalizedTimeOrderingMatch "
 116                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 117                 "SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )",
 118                 &ad_pwdChangedTime },
 119         {       "( 1.3.6.1.4.1.42.2.27.8.1.17 "
 120                 "NAME ( 'pwdAccountLockedTime' ) "
 121                 "DESC 'The time an user account was locked' "
 122                 "EQUALITY generalizedTimeMatch "
 123                 "ORDERING generalizedTimeOrderingMatch "
 124                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 125                 "SINGLE-VALUE "
 126 #if 0
 127                 /* Not until Relax control is released */
 128                 "NO-USER-MODIFICATION "
 129 #endif
 130                 "USAGE directoryOperation )",
 131                 &ad_pwdAccountLockedTime },
 132         {       "( 1.3.6.1.4.1.42.2.27.8.1.19 "
 133                 "NAME ( 'pwdFailureTime' ) "
 134                 "DESC 'The timestamps of the last consecutive authentication failures' "
 135                 "EQUALITY generalizedTimeMatch "
 136                 "ORDERING generalizedTimeOrderingMatch "
 137                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 138                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 139                 &ad_pwdFailureTime },
 140         {       "( 1.3.6.1.4.1.42.2.27.8.1.20 "
 141                 "NAME ( 'pwdHistory' ) "
 142                 "DESC 'The history of users passwords' "
 143                 "EQUALITY octetStringMatch "
 144                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 "
 145                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 146                 &ad_pwdHistory },
 147         {       "( 1.3.6.1.4.1.42.2.27.8.1.21 "
 148                 "NAME ( 'pwdGraceUseTime' ) "
 149                 "DESC 'The timestamps of the grace login once the password has expired' "
 150                 "EQUALITY generalizedTimeMatch "
 151                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 152                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 153                 &ad_pwdGraceUseTime },
 154         {       "( 1.3.6.1.4.1.42.2.27.8.1.22 "
 155                 "NAME ( 'pwdReset' ) "
 156                 "DESC 'The indication that the password has been reset' "
 157                 "EQUALITY booleanMatch "
 158                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
 159                 "SINGLE-VALUE USAGE directoryOperation )",
 160                 &ad_pwdReset },
 161         {       "( 1.3.6.1.4.1.42.2.27.8.1.23 "
 162                 "NAME ( 'pwdPolicySubentry' ) "
 163                 "DESC 'The pwdPolicy subentry in effect for this object' "
 164                 "EQUALITY distinguishedNameMatch "
 165                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
 166                 "SINGLE-VALUE "
 167 #if 0
 168                 /* Not until Relax control is released */
 169                 "NO-USER-MODIFICATION "
 170 #endif
 171                 "USAGE directoryOperation )",
 172                 &ad_pwdPolicySubentry },
 173         { NULL, NULL }
 174 };
 175
 176 /* User attributes */
 177 static AttributeDescription *ad_pwdMinAge, *ad_pwdMaxAge, *ad_pwdInHistory,
 178         *ad_pwdCheckQuality, *ad_pwdMinLength, *ad_pwdMaxFailure,
 179         *ad_pwdGraceAuthNLimit, *ad_pwdExpireWarning, *ad_pwdLockoutDuration,
 180         *ad_pwdFailureCountInterval, *ad_pwdCheckModule, *ad_pwdLockout,
 181         *ad_pwdMustChange, *ad_pwdAllowUserChange, *ad_pwdSafeModify,
 182         *ad_pwdAttribute;
 183
 184 #define TAB(name)       { #name, &ad_##name }
 185
 186 static struct schema_info pwd_UsSchema[] = {
 187         TAB(pwdAttribute),
 188         TAB(pwdMinAge),
 189         TAB(pwdMaxAge),
 190         TAB(pwdInHistory),
 191         TAB(pwdCheckQuality),
 192         TAB(pwdMinLength),
 193         TAB(pwdMaxFailure),
 194         TAB(pwdGraceAuthNLimit),
 195         TAB(pwdExpireWarning),
 196         TAB(pwdLockout),
 197         TAB(pwdLockoutDuration),
 198         TAB(pwdFailureCountInterval),
 199         TAB(pwdCheckModule),
 200         TAB(pwdMustChange),
 201         TAB(pwdAllowUserChange),
 202         TAB(pwdSafeModify),
 203         { NULL, NULL }
 204 };
 205
 206 static ldap_pvt_thread_mutex_t chk_syntax_mutex;
 207
 208 enum {
 209         PPOLICY_DEFAULT = 1,
 210         PPOLICY_HASH_CLEARTEXT,
 211         PPOLICY_USE_LOCKOUT
 212 };
 213
 214 static ConfigDriver ppolicy_cf_default;
 215
 216 static ConfigTable ppolicycfg[] = {
 217         { "ppolicy_default", "policyDN", 2, 2, 0,
 218           ARG_DN|ARG_QUOTE|ARG_MAGIC|PPOLICY_DEFAULT, ppolicy_cf_default,
 219           "( OLcfgOvAt:12.1 NAME 'olcPPolicyDefault' "
 220           "DESC 'DN of a pwdPolicy object for uncustomized objects' "
 221           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 222         { "ppolicy_hash_cleartext", "on|off", 1, 2, 0,
 223           ARG_ON_OFF|ARG_OFFSET|PPOLICY_HASH_CLEARTEXT,
 224           (void *)offsetof(pp_info,hash_passwords),
 225           "( OLcfgOvAt:12.2 NAME 'olcPPolicyHashCleartext' "
 226           "DESC 'Hash passwords on add or modify' "
 227           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
 228         { "ppolicy_forward_updates", "on|off", 1, 2, 0,
 229           ARG_ON_OFF|ARG_OFFSET,
 230           (void *)offsetof(pp_info,forward_updates),
 231           "( OLcfgOvAt:12.4 NAME 'olcPPolicyForwardUpdates' "
 232           "DESC 'Allow policy state updates to be forwarded via updateref' "
 233           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
 234         { "ppolicy_use_lockout", "on|off", 1, 2, 0,
 235           ARG_ON_OFF|ARG_OFFSET|PPOLICY_USE_LOCKOUT,
 236           (void *)offsetof(pp_info,use_lockout),
 237           "( OLcfgOvAt:12.3 NAME 'olcPPolicyUseLockout' "
 238           "DESC 'Warn clients with AccountLocked' "
 239           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
 240         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 241 };
 242
 243 static ConfigOCs ppolicyocs[] = {
 244         { "( OLcfgOvOc:12.1 "
 245           "NAME 'olcPPolicyConfig' "
 246           "DESC 'Password Policy configuration' "
 247           "SUP olcOverlayConfig "
 248           "MAY ( olcPPolicyDefault $ olcPPolicyHashCleartext $ "
 249           "olcPPolicyUseLockout $ olcPPolicyForwardUpdates ) )",
 250           Cft_Overlay, ppolicycfg },
 251         { NULL, 0, NULL }
 252 };
 253
 254 static int
 255 ppolicy_cf_default( ConfigArgs *c )
 256 {
 257         slap_overinst *on = (slap_overinst *)c->bi;
 258         pp_info *pi = (pp_info *)on->on_bi.bi_private;
 259         int rc = ARG_BAD_CONF;
 260
 261         assert ( c->type == PPOLICY_DEFAULT );
 262         Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default\n", 0, 0, 0);
 263
 264         switch ( c->op ) {
 265         case SLAP_CONFIG_EMIT:
 266                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default emit\n", 0, 0, 0);
 267                 rc = 0;
 268                 if ( !BER_BVISEMPTY( &pi->def_policy )) {
 269                         rc = value_add_one( &c->rvalue_vals,
 270                                             &pi->def_policy );
 271                         if ( rc ) return rc;
 272                         rc = value_add_one( &c->rvalue_nvals,
 273                                             &pi->def_policy );
 274                 }
 275                 break;
 276         case LDAP_MOD_DELETE:
 277                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default delete\n", 0, 0, 0);
 278                 if ( pi->def_policy.bv_val ) {
 279                         ber_memfree ( pi->def_policy.bv_val );
 280                         pi->def_policy.bv_val = NULL;
 281                 }
 282                 pi->def_policy.bv_len = 0;
 283                 rc = 0;
 284                 break;
 285         case SLAP_CONFIG_ADD:
 286                 /* fallthrough to LDAP_MOD_ADD */
 287         case LDAP_MOD_ADD:
 288                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default add\n", 0, 0, 0);
 289                 if ( pi->def_policy.bv_val ) {
 290                         ber_memfree ( pi->def_policy.bv_val );
 291                 }
 292                 pi->def_policy = c->value_ndn;
 293                 ber_memfree( c->value_dn.bv_val );
 294                 BER_BVZERO( &c->value_dn );
 295                 BER_BVZERO( &c->value_ndn );
 296                 rc = 0;
 297                 break;
 298         default:
 299                 abort ();
 300         }
 301
 302         return rc;
 303 }
 304
 305 static time_t
 306 parse_time( char *atm )
 307 {
 308         struct lutil_tm tm;
 309         struct lutil_timet tt;
 310         time_t ret = (time_t)-1;
 311
 312         if ( lutil_parsetime( atm, &tm ) == 0) {
 313                 lutil_tm2time( &tm, &tt );
 314                 ret = tt.tt_sec;
 315         }
 316         return ret;
 317 }
 318
 319 static int
 320 account_locked( Operation *op, Entry *e,
 321                 PassPolicy *pp, Modifications **mod )
 322 {
 323         Attribute       *la;
 324
 325         assert(mod != NULL);
 326
 327         if ( !pp->pwdLockout )
 328                 return 0;
 329
 330         if ( (la = attr_find( e->e_attrs, ad_pwdAccountLockedTime )) != NULL ) {
 331                 BerVarray vals = la->a_nvals;
 332
 333                 /*
 334                  * there is a lockout stamp - we now need to know if it's
 335                  * a valid one.
 336                  */
 337                 if (vals[0].bv_val != NULL) {
 338                         time_t then, now;
 339                         Modifications *m;
 340
 341                         if ((then = parse_time( vals[0].bv_val )) == (time_t)0)
 342                                 return 1;
 343
 344                         now = slap_get_time();
 345
 346                         /* Still in the future? not yet in effect */
 347                         if (now < then)
 348                                 return 0;
 349
 350                         if (!pp->pwdLockoutDuration)
 351                                 return 1;
 352
 353                         if (now < then + pp->pwdLockoutDuration)
 354                                 return 1;
 355
 356                         m = ch_calloc( sizeof(Modifications), 1 );
 357                         m->sml_op = LDAP_MOD_DELETE;
 358                         m->sml_flags = 0;
 359                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 360                         m->sml_desc = ad_pwdAccountLockedTime;
 361                         m->sml_next = *mod;
 362                         *mod = m;
 363                 }
 364         }
 365
 366         return 0;
 367 }
 368
 369 /* IMPLICIT TAGS, all context-specific */
 370 #define PPOLICY_WARNING 0xa0L   /* constructed + 0 */
 371 #define PPOLICY_ERROR 0x81L             /* primitive + 1 */
 372
 373 #define PPOLICY_EXPIRE 0x80L    /* primitive + 0 */
 374 #define PPOLICY_GRACE  0x81L    /* primitive + 1 */
 375
 376 static const char ppolicy_ctrl_oid[] = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
 377
 378 static LDAPControl *
 379 create_passcontrol( Operation *op, int exptime, int grace, LDAPPasswordPolicyError err )
 380 {
 381         BerElementBuffer berbuf, bb2;
 382         BerElement *ber = (BerElement *) &berbuf, *b2 = (BerElement *) &bb2;
 383         LDAPControl c = { 0 }, *cp;
 384         struct berval bv;
 385
 386         BER_BVZERO( &c.ldctl_value );
 387
 388         ber_init2( ber, NULL, LBER_USE_DER );
 389         ber_printf( ber, "{" /*}*/ );
 390
 391         if ( exptime >= 0 ) {
 392                 ber_init2( b2, NULL, LBER_USE_DER );
 393                 ber_printf( b2, "ti", PPOLICY_EXPIRE, exptime );
 394                 ber_flatten2( b2, &bv, 1 );
 395                 (void)ber_free_buf(b2);
 396                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 397                 ch_free( bv.bv_val );
 398         } else if ( grace > 0 ) {
 399                 ber_init2( b2, NULL, LBER_USE_DER );
 400                 ber_printf( b2, "ti", PPOLICY_GRACE, grace );
 401                 ber_flatten2( b2, &bv, 1 );
 402                 (void)ber_free_buf(b2);
 403                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 404                 ch_free( bv.bv_val );
 405         }
 406
 407         if (err != PP_noError ) {
 408                 ber_printf( ber, "te", PPOLICY_ERROR, err );
 409         }
 410         ber_printf( ber, /*{*/ "N}" );
 411
 412         if (ber_flatten2( ber, &c.ldctl_value, 0 ) == -1) {
 413                 return NULL;
 414         }
 415         cp = op->o_tmpalloc( sizeof( LDAPControl ) + c.ldctl_value.bv_len, op->o_tmpmemctx );
 416         cp->ldctl_oid = (char *)ppolicy_ctrl_oid;
 417         cp->ldctl_iscritical = 0;
 418         cp->ldctl_value.bv_val = (char *)&cp[1];
 419         cp->ldctl_value.bv_len = c.ldctl_value.bv_len;
 420         AC_MEMCPY( cp->ldctl_value.bv_val, c.ldctl_value.bv_val, c.ldctl_value.bv_len );
 421         (void)ber_free_buf(ber);
 422
 423         return cp;
 424 }
 425
 426 static LDAPControl **
 427 add_passcontrol( Operation *op, SlapReply *rs, LDAPControl *ctrl )
 428 {
 429         LDAPControl **ctrls, **oldctrls = rs->sr_ctrls;
 430         int n;
 431
 432         n = 0;
 433         if ( oldctrls ) {
 434                 for ( ; oldctrls[n]; n++ )
 435                         ;
 436         }
 437         n += 2;
 438
 439         ctrls = op->o_tmpcalloc( sizeof( LDAPControl * ), n, op->o_tmpmemctx );
 440
 441         n = 0;
 442         if ( oldctrls ) {
 443                 for ( ; oldctrls[n]; n++ ) {
 444                         ctrls[n] = oldctrls[n];
 445                 }
 446         }
 447         ctrls[n] = ctrl;
 448         ctrls[n+1] = NULL;
 449
 450         rs->sr_ctrls = ctrls;
 451
 452         return oldctrls;
 453 }
 454
 455 static void
 456 ppolicy_get( Operation *op, Entry *e, PassPolicy *pp )
 457 {
 458         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 459         pp_info *pi = on->on_bi.bi_private;
 460         Attribute *a;
 461         BerVarray vals;
 462         int rc;
 463         Entry *pe = NULL;
 464 #if 0
 465         const char *text;
 466 #endif
 467
 468         memset( pp, 0, sizeof(PassPolicy) );
 469
 470         pp->ad = slap_schema.si_ad_userPassword;
 471
 472         /* Users can change their own password by default */
 473         pp->pwdAllowUserChange = 1;
 474
 475         if ((a = attr_find( e->e_attrs, ad_pwdPolicySubentry )) == NULL) {
 476                 /*
 477                  * entry has no password policy assigned - use default
 478                  */
 479                 vals = &pi->def_policy;
 480                 if ( !vals->bv_val )
 481                         goto defaultpol;
 482         } else {
 483                 vals = a->a_nvals;
 484                 if (vals[0].bv_val == NULL) {
 485                         Debug( LDAP_DEBUG_ANY,
 486                                 "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
 487                         goto defaultpol;
 488                 }
 489         }
 490
 491         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 492         rc = be_entry_get_rw( op, vals, NULL, NULL, 0, &pe );
 493         op->o_bd->bd_info = (BackendInfo *)on;
 494
 495         if ( rc ) goto defaultpol;
 496
 497 #if 0   /* Only worry about userPassword for now */
 498         if ((a = attr_find( pe->e_attrs, ad_pwdAttribute )))
 499                 slap_bv2ad( &a->a_vals[0], &pp->ad, &text );
 500 #endif
 501
 502         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinAge ) )
 503                         && lutil_atoi( &pp->pwdMinAge, a->a_vals[0].bv_val ) != 0 )
 504                 goto defaultpol;
 505         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxAge ) )
 506                         && lutil_atoi( &pp->pwdMaxAge, a->a_vals[0].bv_val ) != 0 )
 507                 goto defaultpol;
 508         if ( ( a = attr_find( pe->e_attrs, ad_pwdInHistory ) )
 509                         && lutil_atoi( &pp->pwdInHistory, a->a_vals[0].bv_val ) != 0 )
 510                 goto defaultpol;
 511         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckQuality ) )
 512                         && lutil_atoi( &pp->pwdCheckQuality, a->a_vals[0].bv_val ) != 0 )
 513                 goto defaultpol;
 514         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinLength ) )
 515                         && lutil_atoi( &pp->pwdMinLength, a->a_vals[0].bv_val ) != 0 )
 516                 goto defaultpol;
 517         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxFailure ) )
 518                         && lutil_atoi( &pp->pwdMaxFailure, a->a_vals[0].bv_val ) != 0 )
 519                 goto defaultpol;
 520         if ( ( a = attr_find( pe->e_attrs, ad_pwdGraceAuthNLimit ) )
 521                         && lutil_atoi( &pp->pwdGraceAuthNLimit, a->a_vals[0].bv_val ) != 0 )
 522                 goto defaultpol;
 523         if ( ( a = attr_find( pe->e_attrs, ad_pwdExpireWarning ) )
 524                         && lutil_atoi( &pp->pwdExpireWarning, a->a_vals[0].bv_val ) != 0 )
 525                 goto defaultpol;
 526         if ( ( a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval ) )
 527                         && lutil_atoi( &pp->pwdFailureCountInterval, a->a_vals[0].bv_val ) != 0 )
 528                 goto defaultpol;
 529         if ( ( a = attr_find( pe->e_attrs, ad_pwdLockoutDuration ) )
 530                         && lutil_atoi( &pp->pwdLockoutDuration, a->a_vals[0].bv_val ) != 0 )
 531                 goto defaultpol;
 532
 533         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckModule ) ) ) {
 534                 strncpy( pp->pwdCheckModule, a->a_vals[0].bv_val,
 535                         sizeof(pp->pwdCheckModule) );
 536                 pp->pwdCheckModule[sizeof(pp->pwdCheckModule)-1] = '\0';
 537         }
 538
 539         if ((a = attr_find( pe->e_attrs, ad_pwdLockout )))
 540                 pp->pwdLockout = bvmatch( &a->a_nvals[0], &slap_true_bv );
 541         if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
 542                 pp->pwdMustChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 543         if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
 544                 pp->pwdAllowUserChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 545         if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
 546                 pp->pwdSafeModify = bvmatch( &a->a_nvals[0], &slap_true_bv );
 547
 548         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 549         be_entry_release_r( op, pe );
 550         op->o_bd->bd_info = (BackendInfo *)on;
 551
 552         return;
 553
 554 defaultpol:
 555         Debug( LDAP_DEBUG_TRACE,
 556                 "ppolicy_get: using default policy\n", 0, 0, 0 );
 557         return;
 558 }
 559
 560 static int
 561 password_scheme( struct berval *cred, struct berval *sch )
 562 {
 563         int e;
 564
 565         assert( cred != NULL );
 566
 567         if (sch) {
 568                 sch->bv_val = NULL;
 569                 sch->bv_len = 0;
 570         }
 571
 572         if ((cred->bv_len == 0) || (cred->bv_val == NULL) ||
 573                 (cred->bv_val[0] != '{')) return LDAP_OTHER;
 574
 575         for(e = 1; cred->bv_val[e] && cred->bv_val[e] != '}'; e++);
 576         if (cred->bv_val[e]) {
 577                 int rc;
 578                 rc = lutil_passwd_scheme( cred->bv_val );
 579                 if (rc) {
 580                         if (sch) {
 581                                 sch->bv_val = cred->bv_val;
 582                                 sch->bv_len = e;
 583                         }
 584                         return LDAP_SUCCESS;
 585                 }
 586         }
 587         return LDAP_OTHER;
 588 }
 589
 590 static int
 591 check_password_quality( struct berval *cred, PassPolicy *pp, LDAPPasswordPolicyError *err, Entry *e, char **txt )
 592 {
 593         int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
 594         char *ptr = cred->bv_val;
 595         struct berval sch;
 596
 597         assert( cred != NULL );
 598         assert( pp != NULL );
 599         assert( txt != NULL );
 600
 601         *txt = NULL;
 602
 603         if ((cred->bv_len == 0) || (pp->pwdMinLength > cred->bv_len)) {
 604                 rc = LDAP_CONSTRAINT_VIOLATION;
 605                 if ( err ) *err = PP_passwordTooShort;
 606                 return rc;
 607         }
 608
 609         /*
 610          * We need to know if the password is already hashed - if so
 611          * what scheme is it. The reason being that the "hash" of
 612          * {cleartext} still allows us to check the password.
 613          */
 614         rc = password_scheme( cred, &sch );
 615         if (rc == LDAP_SUCCESS) {
 616                 if ((sch.bv_val) && (strncasecmp( sch.bv_val, "{cleartext}",
 617                         sch.bv_len ) == 0)) {
 618                         /*
 619                          * We can check the cleartext "hash"
 620                          */
 621                         ptr = cred->bv_val + sch.bv_len;
 622                 } else {
 623                         /* everything else, we can't check */
 624                         if (pp->pwdCheckQuality == 2) {
 625                                 rc = LDAP_CONSTRAINT_VIOLATION;
 626                                 if (err) *err = PP_insufficientPasswordQuality;
 627                                 return rc;
 628                         }
 629                         /*
 630                          * We can't check the syntax of the password, but it's not
 631                          * mandatory (according to the policy), so we return success.
 632                          */
 633
 634                         return LDAP_SUCCESS;
 635                 }
 636         }
 637
 638         rc = LDAP_SUCCESS;
 639
 640         if (pp->pwdCheckModule[0]) {
 641 #ifdef SLAPD_MODULES
 642                 lt_dlhandle mod;
 643                 const char *err;
 644
 645                 if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
 646                         err = lt_dlerror();
 647
 648                         Debug(LDAP_DEBUG_ANY,
 649                         "check_password_quality: lt_dlopen failed: (%s) %s.\n",
 650                                 pp->pwdCheckModule, err, 0 );
 651                         ok = LDAP_OTHER; /* internal error */
 652                 } else {
 653                         /* FIXME: the error message ought to be passed thru a
 654                          * struct berval, with preallocated buffer and size
 655                          * passed in. Module can still allocate a buffer for
 656                          * it if the provided one is too small.
 657                          */
 658                         int (*prog)( char *passwd, char **text, Entry *ent );
 659
 660                         if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
 661                                 err = lt_dlerror();
 662
 663                                 Debug(LDAP_DEBUG_ANY,
 664                                         "check_password_quality: lt_dlsym failed: (%s) %s.\n",
 665                                         pp->pwdCheckModule, err, 0 );
 666                                 ok = LDAP_OTHER;
 667                         } else {
 668                                 ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
 669                                 ok = prog( ptr, txt, e );
 670                                 ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
 671                                 if (ok != LDAP_SUCCESS) {
 672                                         Debug(LDAP_DEBUG_ANY,
 673                                                 "check_password_quality: module error: (%s) %s.[%d]\n",
 674                                                 pp->pwdCheckModule, *txt ? *txt : "", ok );
 675                                 }
 676                         }
 677
 678                         lt_dlclose( mod );
 679                 }
 680 #else
 681         Debug(LDAP_DEBUG_ANY, "check_password_quality: external modules not "
 682                 "supported. pwdCheckModule ignored.\n", 0, 0, 0);
 683 #endif /* SLAPD_MODULES */
 684         }
 685
 686
 687         if (ok != LDAP_SUCCESS) {
 688                 rc = LDAP_CONSTRAINT_VIOLATION;
 689                 if (err) *err = PP_insufficientPasswordQuality;
 690         }
 691
 692         return rc;
 693 }
 694
 695 static int
 696 parse_pwdhistory( struct berval *bv, char **oid, time_t *oldtime, struct berval *oldpw )
 697 {
 698         char *ptr;
 699         struct berval nv, npw;
 700         ber_len_t i, j;
 701
 702         assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
 703
 704         if ( oid ) {
 705                 *oid = 0;
 706         }
 707         *oldtime = (time_t)-1;
 708         BER_BVZERO( oldpw );
 709
 710         ber_dupbv( &nv, bv );
 711
 712         /* first get the time field */
 713         for ( i = 0; (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 714                 ;
 715         if ( i == nv.bv_len ) {
 716                 goto exit_failure; /* couldn't locate the '#' separator */
 717         }
 718         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 719         ptr = nv.bv_val;
 720         *oldtime = parse_time( ptr );
 721         if (*oldtime == (time_t)-1) {
 722                 goto exit_failure;
 723         }
 724
 725         /* get the OID field */
 726         for (ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 727                 ;
 728         if ( i == nv.bv_len ) {
 729                 goto exit_failure; /* couldn't locate the '#' separator */
 730         }
 731         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 732         if ( oid ) {
 733                 *oid = ber_strdup( ptr );
 734         }
 735
 736         /* get the length field */
 737         for ( ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 738                 ;
 739         if ( i == nv.bv_len ) {
 740                 goto exit_failure; /* couldn't locate the '#' separator */
 741         }
 742         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 743         oldpw->bv_len = strtol( ptr, NULL, 10 );
 744         if (errno == ERANGE) {
 745                 goto exit_failure;
 746         }
 747
 748         /* lastly, get the octets of the string */
 749         for ( j = i, ptr = &(nv.bv_val[i]); i < nv.bv_len; i++ )
 750                 ;
 751         if ( i - j != oldpw->bv_len) {
 752                 goto exit_failure; /* length is wrong */
 753         }
 754
 755         npw.bv_val = ptr;
 756         npw.bv_len = oldpw->bv_len;
 757         ber_dupbv( oldpw, &npw );
 758         ber_memfree( nv.bv_val );
 759
 760         return LDAP_SUCCESS;
 761
 762 exit_failure:;
 763         if ( oid && *oid ) {
 764                 ber_memfree(*oid);
 765                 *oid = NULL;
 766         }
 767         if ( oldpw->bv_val ) {
 768                 ber_memfree( oldpw->bv_val);
 769                 BER_BVZERO( oldpw );
 770         }
 771         ber_memfree( nv.bv_val );
 772
 773         return LDAP_OTHER;
 774 }
 775
 776 static void
 777 add_to_pwd_history( pw_hist **l, time_t t,
 778                     struct berval *oldpw, struct berval *bv )
 779 {
 780         pw_hist *p, *p1, *p2;
 781
 782         if (!l) return;
 783
 784         p = ch_malloc( sizeof( pw_hist ));
 785         p->pw = *oldpw;
 786         ber_dupbv( &p->bv, bv );
 787         p->t = t;
 788         p->next = NULL;
 789
 790         if (*l == NULL) {
 791                 /* degenerate case */
 792                 *l = p;
 793                 return;
 794         }
 795         /*
 796          * advance p1 and p2 such that p1 is the node before the
 797          * new one, and p2 is the node after it
 798          */
 799         for (p1 = NULL, p2 = *l; p2 && p2->t <= t; p1 = p2, p2=p2->next );
 800         p->next = p2;
 801         if (p1 == NULL) { *l = p; return; }
 802         p1->next = p;
 803 }
 804
 805 #ifndef MAX_PWD_HISTORY_SZ
 806 #define MAX_PWD_HISTORY_SZ 1024
 807 #endif /* MAX_PWD_HISTORY_SZ */
 808
 809 static void
 810 make_pwd_history_value( char *timebuf, struct berval *bv, Attribute *pa )
 811 {
 812         char str[ MAX_PWD_HISTORY_SZ ];
 813         int nlen;
 814
 815         snprintf( str, MAX_PWD_HISTORY_SZ,
 816                   "%s#%s#%lu#", timebuf,
 817                   pa->a_desc->ad_type->sat_syntax->ssyn_oid,
 818                   (unsigned long) pa->a_nvals[0].bv_len );
 819         str[MAX_PWD_HISTORY_SZ-1] = 0;
 820         nlen = strlen(str);
 821
 822         /*
 823          * We have to assume that the string is a string of octets,
 824          * not readable characters. In reality, yes, it probably is
 825          * a readable (ie, base64) string, but we can't count on that
 826          * Hence, while the first 3 fields of the password history
 827          * are definitely readable (a timestamp, an OID and an integer
 828          * length), the remaining octets of the actual password
 829          * are deemed to be binary data.
 830          */
 831         AC_MEMCPY( str + nlen, pa->a_nvals[0].bv_val, pa->a_nvals[0].bv_len );
 832         nlen += pa->a_nvals[0].bv_len;
 833         bv->bv_val = ch_malloc( nlen + 1 );
 834         AC_MEMCPY( bv->bv_val, str, nlen );
 835         bv->bv_val[nlen] = '\0';
 836         bv->bv_len = nlen;
 837 }
 838
 839 static void
 840 free_pwd_history_list( pw_hist **l )
 841 {
 842         pw_hist *p;
 843
 844         if (!l) return;
 845         p = *l;
 846         while (p) {
 847                 pw_hist *pp = p->next;
 848
 849                 free(p->pw.bv_val);
 850                 free(p->bv.bv_val);
 851                 free(p);
 852                 p = pp;
 853         }
 854         *l = NULL;
 855 }
 856
 857 typedef struct ppbind {
 858         slap_overinst *on;
 859         int send_ctrl;
 860         LDAPControl **oldctrls;
 861         Modifications *mod;
 862         LDAPPasswordPolicyError pErr;
 863         PassPolicy pp;
 864 } ppbind;
 865
 866 static void
 867 ctrls_cleanup( Operation *op, SlapReply *rs, LDAPControl **oldctrls )
 868 {
 869         int n;
 870
 871         assert( rs->sr_ctrls != NULL );
 872         assert( rs->sr_ctrls[0] != NULL );
 873
 874         for ( n = 0; rs->sr_ctrls[n]; n++ ) {
 875                 if ( rs->sr_ctrls[n]->ldctl_oid == ppolicy_ctrl_oid ) {
 876                         op->o_tmpfree( rs->sr_ctrls[n], op->o_tmpmemctx );
 877                         rs->sr_ctrls[n] = (LDAPControl *)(-1);
 878                         break;
 879                 }
 880         }
 881
 882         if ( rs->sr_ctrls[n] == NULL ) {
 883                 /* missed? */
 884         }
 885
 886         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 887
 888         rs->sr_ctrls = oldctrls;
 889 }
 890
 891 static int
 892 ppolicy_ctrls_cleanup( Operation *op, SlapReply *rs )
 893 {
 894         ppbind *ppb = op->o_callback->sc_private;
 895         if ( ppb->send_ctrl ) {
 896                 ctrls_cleanup( op, rs, ppb->oldctrls );
 897         }
 898         return SLAP_CB_CONTINUE;
 899 }
 900
 901 static int
 902 ppolicy_bind_response( Operation *op, SlapReply *rs )
 903 {
 904         ppbind *ppb = op->o_callback->sc_private;
 905         slap_overinst *on = ppb->on;
 906         Modifications *mod = ppb->mod, *m;
 907         int pwExpired = 0;
 908         int ngut = -1, warn = -1, age, rc;
 909         Attribute *a;
 910         time_t now, pwtime = (time_t)-1;
 911         char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 912         struct berval timestamp;
 913         BackendInfo *bi = op->o_bd->bd_info;
 914         Entry *e;
 915
 916         /* If we already know it's locked, just get on with it */
 917         if ( ppb->pErr != PP_noError ) {
 918                 goto locked;
 919         }
 920
 921         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 922         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 923         op->o_bd->bd_info = bi;
 924
 925         if ( rc != LDAP_SUCCESS ) {
 926                 return SLAP_CB_CONTINUE;
 927         }
 928
 929         now = slap_get_time(); /* stored for later consideration */
 930         timestamp.bv_val = nowstr;
 931         timestamp.bv_len = sizeof(nowstr);
 932         slap_timestamp( &now, &timestamp );
 933
 934         if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
 935                 int i = 0, fc = 0;
 936
 937                 m = ch_calloc( sizeof(Modifications), 1 );
 938                 m->sml_op = LDAP_MOD_ADD;
 939                 m->sml_flags = 0;
 940                 m->sml_type = ad_pwdFailureTime->ad_cname;
 941                 m->sml_desc = ad_pwdFailureTime;
 942                 m->sml_numvals = 1;
 943                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 944                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 945
 946                 ber_dupbv( &m->sml_values[0], &timestamp );
 947                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 948                 m->sml_next = mod;
 949                 mod = m;
 950
 951                 /*
 952                  * Count the pwdFailureTimes - if it's
 953                  * greater than the policy pwdMaxFailure,
 954                  * then lock the account.
 955                  */
 956                 if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
 957                         for(i=0; a->a_nvals[i].bv_val; i++) {
 958
 959                                 /*
 960                                  * If the interval is 0, then failures
 961                                  * stay on the record until explicitly
 962                                  * reset by successful authentication.
 963                                  */
 964                                 if (ppb->pp.pwdFailureCountInterval == 0) {
 965                                         fc++;
 966                                 } else if (now <=
 967                                                         parse_time(a->a_nvals[i].bv_val) +
 968                                                         ppb->pp.pwdFailureCountInterval) {
 969
 970                                         fc++;
 971                                 }
 972                                 /*
 973                                  * We only count those failures
 974                                  * which are not due to expire.
 975                                  */
 976                         }
 977                 }
 978
 979                 if ((ppb->pp.pwdMaxFailure > 0) &&
 980                         (fc >= ppb->pp.pwdMaxFailure - 1)) {
 981
 982                         /*
 983                          * We subtract 1 from the failure max
 984                          * because the new failure entry hasn't
 985                          * made it to the entry yet.
 986                          */
 987                         m = ch_calloc( sizeof(Modifications), 1 );
 988                         m->sml_op = LDAP_MOD_REPLACE;
 989                         m->sml_flags = 0;
 990                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 991                         m->sml_desc = ad_pwdAccountLockedTime;
 992                         m->sml_numvals = 1;
 993                         m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 994                         m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 995                         ber_dupbv( &m->sml_values[0], &timestamp );
 996                         ber_dupbv( &m->sml_nvalues[0], &timestamp );
 997                         m->sml_next = mod;
 998                         mod = m;
 999                 }
1000         } else if ( rs->sr_err == LDAP_SUCCESS ) {
1001                 if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1002                         pwtime = parse_time( a->a_nvals[0].bv_val );
1003
1004                 /* delete all pwdFailureTimes */
1005                 if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
1006                         m = ch_calloc( sizeof(Modifications), 1 );
1007                         m->sml_op = LDAP_MOD_DELETE;
1008                         m->sml_flags = 0;
1009                         m->sml_type = ad_pwdFailureTime->ad_cname;
1010                         m->sml_desc = ad_pwdFailureTime;
1011                         m->sml_next = mod;
1012                         mod = m;
1013                 }
1014
1015                 /*
1016                  * check to see if the password must be changed
1017                  */
1018                 if ( ppb->pp.pwdMustChange &&
1019                         (a = attr_find( e->e_attrs, ad_pwdReset )) &&
1020                         bvmatch( &a->a_nvals[0], &slap_true_bv ) )
1021                 {
1022                         /*
1023                          * need to inject client controls here to give
1024                          * more information. For the moment, we ensure
1025                          * that we are disallowed from doing anything
1026                          * other than change password.
1027                          */
1028                         ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
1029                                 &op->o_conn->c_ndn );
1030
1031                         ppb->pErr = PP_changeAfterReset;
1032
1033                 } else {
1034                         /*
1035                          * the password does not need to be changed, so
1036                          * we now check whether the password has expired.
1037                          *
1038                          * We can skip this bit if passwords don't age in
1039                          * the policy. Also, if there was no pwdChangedTime
1040                          * attribute in the entry, the password never expires.
1041                          */
1042                         if (ppb->pp.pwdMaxAge == 0) goto grace;
1043
1044                         if (pwtime != (time_t)-1) {
1045                                 /*
1046                                  * Check: was the last change time of
1047                                  * the password older than the maximum age
1048                                  * allowed. (Ignore case 2 from I-D, it's just silly.)
1049                                  */
1050                                 if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
1051                         }
1052                 }
1053
1054 grace:
1055                 if (!pwExpired) goto check_expiring_password;
1056
1057                 if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
1058                         ngut = ppb->pp.pwdGraceAuthNLimit;
1059                 else {
1060                         for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
1061                         ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
1062                 }
1063
1064                 /*
1065                  * ngut is the number of remaining grace logins
1066                  */
1067                 Debug( LDAP_DEBUG_ANY,
1068                         "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
1069                         e->e_name.bv_val, ngut, 0);
1070
1071                 if (ngut < 1) {
1072                         ppb->pErr = PP_passwordExpired;
1073                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
1074                         goto done;
1075                 }
1076
1077                 /*
1078                  * Add a grace user time to the entry
1079                  */
1080                 m = ch_calloc( sizeof(Modifications), 1 );
1081                 m->sml_op = LDAP_MOD_ADD;
1082                 m->sml_flags = 0;
1083                 m->sml_type = ad_pwdGraceUseTime->ad_cname;
1084                 m->sml_desc = ad_pwdGraceUseTime;
1085                 m->sml_numvals = 1;
1086                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
1087                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
1088                 ber_dupbv( &m->sml_values[0], &timestamp );
1089                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
1090                 m->sml_next = mod;
1091                 mod = m;
1092
1093 check_expiring_password:
1094                 /*
1095                  * Now we need to check to see
1096                  * if it is about to expire, and if so, should the user
1097                  * be warned about it in the password policy control.
1098                  *
1099                  * If the password has expired, and we're in the grace period, then
1100                  * we don't need to do this bit. Similarly, if we don't have password
1101                  * aging, then there's no need to do this bit either.
1102                  */
1103                 if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
1104                         goto done;
1105
1106                 age = (int)(now - pwtime);
1107
1108                 /*
1109                  * We know that there is a password Change Time attribute - if
1110                  * there wasn't, then the pwdExpired value would be true, unless
1111                  * there is no password aging - and if there is no password aging,
1112                  * then this section isn't called anyway - you can't have an
1113                  * expiring password if there's no limit to expire.
1114                  */
1115                 if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
1116                         /*
1117                          * Set the warning value.
1118                          */
1119                         warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
1120                         if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
1121
1122                         Debug( LDAP_DEBUG_ANY,
1123                                 "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
1124                                 op->o_req_dn.bv_val, warn, 0 );
1125                 }
1126         }
1127
1128 done:
1129         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1130         be_entry_release_r( op, e );
1131
1132 locked:
1133         if ( mod ) {
1134                 Operation op2 = *op;
1135                 SlapReply r2 = { REP_RESULT };
1136                 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
1137                 pp_info *pi = on->on_bi.bi_private;
1138
1139                 op2.o_tag = LDAP_REQ_MODIFY;
1140                 op2.o_callback = &cb;
1141                 op2.orm_modlist = mod;
1142                 op2.o_dn = op->o_bd->be_rootdn;
1143                 op2.o_ndn = op->o_bd->be_rootndn;
1144
1145                 /* If this server is a shadow and forward_updates is true,
1146                  * use the frontend to perform this modify. That will trigger
1147                  * the update referral, which can then be forwarded by the
1148                  * chain overlay. Obviously the updateref and chain overlay
1149                  * must be configured appropriately for this to be useful.
1150                  */
1151                 if ( SLAP_SHADOW( op->o_bd ) && pi->forward_updates )
1152                         op2.o_bd = frontendDB;
1153                 else
1154                         op2.o_bd->bd_info = (BackendInfo *)on->on_info;
1155                 rc = op2.o_bd->be_modify( &op2, &r2 );
1156                 slap_mods_free( mod, 1 );
1157         }
1158
1159         if ( ppb->send_ctrl ) {
1160                 LDAPControl *ctrl = NULL;
1161                 pp_info *pi = on->on_bi.bi_private;
1162
1163                 /* Do we really want to tell that the account is locked? */
1164                 if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
1165                         ppb->pErr = PP_noError;
1166                 }
1167                 ctrl = create_passcontrol( op, warn, ngut, ppb->pErr );
1168                 ppb->oldctrls = add_passcontrol( op, rs, ctrl );
1169                 op->o_callback->sc_cleanup = ppolicy_ctrls_cleanup;
1170         }
1171         op->o_bd->bd_info = bi;
1172         return SLAP_CB_CONTINUE;
1173 }
1174
1175 static int
1176 ppolicy_bind( Operation *op, SlapReply *rs )
1177 {
1178         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1179
1180         /* Reset lockout status on all Bind requests */
1181         if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1182                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1183                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1184         }
1185
1186         /* Root bypasses policy */
1187         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
1188                 Entry *e;
1189                 int rc;
1190                 ppbind *ppb;
1191                 slap_callback *cb;
1192
1193                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1194                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1195
1196                 if ( rc != LDAP_SUCCESS ) {
1197                         return SLAP_CB_CONTINUE;
1198                 }
1199
1200                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1201                         1, op->o_tmpmemctx );
1202                 ppb = (ppbind *)(cb+1);
1203                 ppb->on = on;
1204                 ppb->pErr = PP_noError;
1205
1206                 /* Setup a callback so we can munge the result */
1207
1208                 cb->sc_response = ppolicy_bind_response;
1209                 cb->sc_next = op->o_callback->sc_next;
1210                 cb->sc_private = ppb;
1211                 op->o_callback->sc_next = cb;
1212
1213                 /* Did we receive a password policy request control? */
1214                 if ( op->o_ctrlflag[ppolicy_cid] ) {
1215                         ppb->send_ctrl = 1;
1216                 }
1217
1218                 op->o_bd->bd_info = (BackendInfo *)on;
1219                 ppolicy_get( op, e, &ppb->pp );
1220
1221                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1222
1223                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1224                 be_entry_release_r( op, e );
1225
1226                 if ( rc ) {
1227                         /* This will be the Draft 8 response, Unwilling is bogus */
1228                         ppb->pErr = PP_accountLocked;
1229                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
1230                         return rs->sr_err;
1231                 }
1232
1233         }
1234
1235         return SLAP_CB_CONTINUE;
1236 }
1237
1238 /* Reset the restricted info for the next session on this connection */
1239 static int
1240 ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
1241 {
1242         if ( !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
1243                 ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
1244                 BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
1245         }
1246         return SLAP_CB_CONTINUE;
1247 }
1248
1249 /* Check if this connection is restricted */
1250 static int
1251 ppolicy_restrict(
1252         Operation *op,
1253         SlapReply *rs )
1254 {
1255         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1256         int send_ctrl = 0;
1257
1258         /* Did we receive a password policy request control? */
1259         if ( op->o_ctrlflag[ppolicy_cid] ) {
1260                 send_ctrl = 1;
1261         }
1262
1263         if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1264                 LDAPControl **oldctrls;
1265                 /* if the current authcDN doesn't match the one we recorded,
1266                  * then an intervening Bind has succeeded and the restriction
1267                  * no longer applies. (ITS#4516)
1268                  */
1269                 if ( !dn_match( &op->o_conn->c_ndn,
1270                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1271                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1272                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1273                         return SLAP_CB_CONTINUE;
1274                 }
1275
1276                 Debug( LDAP_DEBUG_TRACE,
1277                         "connection restricted to password changing only\n", 0, 0, 0);
1278                 if ( send_ctrl ) {
1279                         LDAPControl *ctrl = NULL;
1280                         ctrl = create_passcontrol( op, -1, -1, PP_changeAfterReset );
1281                         oldctrls = add_passcontrol( op, rs, ctrl );
1282                 }
1283                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1284                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
1285                         "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
1286                 if ( send_ctrl ) {
1287                         ctrls_cleanup( op, rs, oldctrls );
1288                 }
1289                 return rs->sr_err;
1290         }
1291
1292         return SLAP_CB_CONTINUE;
1293 }
1294
1295 static int
1296 ppolicy_add(
1297         Operation *op,
1298         SlapReply *rs )
1299 {
1300         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1301         pp_info *pi = on->on_bi.bi_private;
1302         PassPolicy pp;
1303         Attribute *pa;
1304         const char *txt;
1305
1306         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1307                 return rs->sr_err;
1308
1309         /* If this is a replica, assume the master checked everything */
1310         if ( be_shadow_update( op ))
1311                 return SLAP_CB_CONTINUE;
1312
1313         /* Check for password in entry */
1314         if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
1315                 slap_schema.si_ad_userPassword )))
1316         {
1317                 assert( pa->a_vals != NULL );
1318                 assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
1319
1320                 if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
1321                         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
1322                         return rs->sr_err;
1323                 }
1324
1325                 /*
1326                  * new entry contains a password - if we're not the root user
1327                  * then we need to check that the password fits in with the
1328                  * security policy for the new entry.
1329                  */
1330                 ppolicy_get( op, op->ora_e, &pp );
1331                 if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
1332                         struct berval *bv = &(pa->a_vals[0]);
1333                         int rc, send_ctrl = 0;
1334                         LDAPPasswordPolicyError pErr = PP_noError;
1335                         char *txt;
1336
1337                         /* Did we receive a password policy request control? */
1338                         if ( op->o_ctrlflag[ppolicy_cid] ) {
1339                                 send_ctrl = 1;
1340                         }
1341                         rc = check_password_quality( bv, &pp, &pErr, op->ora_e, &txt );
1342                         if (rc != LDAP_SUCCESS) {
1343                                 LDAPControl **oldctrls = NULL;
1344                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1345                                 if ( send_ctrl ) {
1346                                         LDAPControl *ctrl = NULL;
1347                                         ctrl = create_passcontrol( op, -1, -1, pErr );
1348                                         oldctrls = add_passcontrol( op, rs, ctrl );
1349                                 }
1350                                 send_ldap_error( op, rs, rc, txt ? txt : "Password fails quality checking policy" );
1351                                 if ( txt ) {
1352                                         free( txt );
1353                                 }
1354                                 if ( send_ctrl ) {
1355                                         ctrls_cleanup( op, rs, oldctrls );
1356                                 }
1357                                 return rs->sr_err;
1358                         }
1359                 }
1360                         /*
1361                          * A controversial bit. We hash cleartext
1362                          * passwords provided via add and modify operations
1363                          * You're not really supposed to do this, since
1364                          * the X.500 model says "store attributes" as they
1365                          * get provided. By default, this is what we do
1366                          *
1367                          * But if the hash_passwords flag is set, we hash
1368                          * any cleartext password attribute values via the
1369                          * default password hashing scheme.
1370                          */
1371                 if ((pi->hash_passwords) &&
1372                         (password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
1373                         struct berval hpw;
1374
1375                         slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
1376                         if (hpw.bv_val == NULL) {
1377                                 /*
1378                                  * hashing didn't work. Emit an error.
1379                                  */
1380                                 rs->sr_err = LDAP_OTHER;
1381                                 rs->sr_text = txt;
1382                                 send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
1383                                 return rs->sr_err;
1384                         }
1385
1386                         memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
1387                         ber_memfree( pa->a_vals[0].bv_val );
1388                         pa->a_vals[0].bv_val = hpw.bv_val;
1389                         pa->a_vals[0].bv_len = hpw.bv_len;
1390                 }
1391
1392                 /* If password aging is in effect, set the pwdChangedTime */
1393                 if ( pp.pwdMaxAge || pp.pwdMinAge ) {
1394                         struct berval timestamp;
1395                         char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1396                         time_t now = slap_get_time();
1397
1398                         timestamp.bv_val = timebuf;
1399                         timestamp.bv_len = sizeof(timebuf);
1400                         slap_timestamp( &now, &timestamp );
1401
1402                         attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
1403                 }
1404         }
1405         return SLAP_CB_CONTINUE;
1406 }
1407
1408 static int
1409 ppolicy_mod_cb( Operation *op, SlapReply *rs )
1410 {
1411         slap_callback *sc = op->o_callback;
1412         op->o_callback = sc->sc_next;
1413         if ( rs->sr_err == LDAP_SUCCESS ) {
1414                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1415                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1416         }
1417         op->o_tmpfree( sc, op->o_tmpmemctx );
1418         return SLAP_CB_CONTINUE;
1419 }
1420
1421 static int
1422 ppolicy_modify( Operation *op, SlapReply *rs )
1423 {
1424         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1425         pp_info                 *pi = on->on_bi.bi_private;
1426         int                     i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
1427                                 hsize = 0;
1428         PassPolicy              pp;
1429         Modifications           *mods = NULL, *modtail = NULL,
1430                                 *ml, *delmod, *addmod;
1431         Attribute               *pa, *ha, at;
1432         const char              *txt;
1433         pw_hist                 *tl = NULL, *p;
1434         int                     zapReset, send_ctrl = 0, free_txt = 0;
1435         Entry                   *e;
1436         struct berval           newpw = BER_BVNULL, oldpw = BER_BVNULL,
1437                                 *bv, cr[2];
1438         LDAPPasswordPolicyError pErr = PP_noError;
1439         LDAPControl             *ctrl = NULL;
1440         LDAPControl             **oldctrls = NULL;
1441         int                     is_pwdexop = 0;
1442
1443         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1444         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1445         op->o_bd->bd_info = (BackendInfo *)on;
1446
1447         if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
1448
1449         /* If this is a replica, we may need to tweak some of the
1450          * master's modifications. Otherwise, just pass it through.
1451          */
1452         if ( be_shadow_update( op )) {
1453                 Modifications **prev;
1454                 int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
1455                 Attribute *a_grace, *a_lock, *a_fail;
1456
1457                 a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
1458                 a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
1459                 a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
1460
1461                 for( prev = &op->orm_modlist, ml = *prev; ml; ml = *prev ) {
1462
1463                         if ( ml->sml_desc == slap_schema.si_ad_userPassword )
1464                                 got_pw = 1;
1465
1466                         /* If we're deleting an attr that didn't exist,
1467                          * drop this delete op
1468                          */
1469                         if ( ml->sml_op == LDAP_MOD_DELETE ) {
1470                                 int drop = 0;
1471
1472                                 if ( ml->sml_desc == ad_pwdGraceUseTime ) {
1473                                         got_del_grace = 1;
1474                                         if ( !a_grace )
1475                                                 drop = 1;
1476                                 } else
1477                                 if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
1478                                         got_del_lock = 1;
1479                                         if ( !a_lock )
1480                                                 drop = 1;
1481                                 } else
1482                                 if ( ml->sml_desc == ad_pwdFailureTime ) {
1483                                         got_del_fail = 1;
1484                                         if ( !a_fail )
1485                                                 drop = 1;
1486                                 }
1487                                 if ( drop ) {
1488                                         *prev = ml->sml_next;
1489                                         ml->sml_next = NULL;
1490                                         slap_mods_free( ml, 1 );
1491                                         continue;
1492                                 }
1493                         }
1494                         prev = &ml->sml_next;
1495                 }
1496
1497                 /* If we're resetting the password, make sure grace, accountlock,
1498                  * and failure also get removed.
1499                  */
1500                 if ( got_pw ) {
1501                         if ( a_grace && !got_del_grace ) {
1502                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1503                                 ml->sml_op = LDAP_MOD_DELETE;
1504                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1505                                 ml->sml_type.bv_val = NULL;
1506                                 ml->sml_desc = ad_pwdGraceUseTime;
1507                                 ml->sml_numvals = 0;
1508                                 ml->sml_values = NULL;
1509                                 ml->sml_nvalues = NULL;
1510                                 ml->sml_next = NULL;
1511                                 *prev = ml;
1512                                 prev = &ml->sml_next;
1513                         }
1514                         if ( a_lock && !got_del_lock ) {
1515                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1516                                 ml->sml_op = LDAP_MOD_DELETE;
1517                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1518                                 ml->sml_type.bv_val = NULL;
1519                                 ml->sml_desc = ad_pwdAccountLockedTime;
1520                                 ml->sml_numvals = 0;
1521                                 ml->sml_values = NULL;
1522                                 ml->sml_nvalues = NULL;
1523                                 ml->sml_next = NULL;
1524                                 *prev = ml;
1525                         }
1526                         if ( a_fail && !got_del_fail ) {
1527                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1528                                 ml->sml_op = LDAP_MOD_DELETE;
1529                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1530                                 ml->sml_type.bv_val = NULL;
1531                                 ml->sml_desc = ad_pwdFailureTime;
1532                                 ml->sml_numvals = 0;
1533                                 ml->sml_values = NULL;
1534                                 ml->sml_nvalues = NULL;
1535                                 ml->sml_next = NULL;
1536                                 *prev = ml;
1537                         }
1538                 }
1539                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1540                 be_entry_release_r( op, e );
1541                 return SLAP_CB_CONTINUE;
1542         }
1543
1544         /* Did we receive a password policy request control? */
1545         if ( op->o_ctrlflag[ppolicy_cid] ) {
1546                 send_ctrl = 1;
1547         }
1548
1549         /* See if this is a pwdModify exop. If so, we can
1550          * access the plaintext passwords from that request.
1551          */
1552         {
1553                 slap_callback *sc;
1554
1555                 for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
1556                         if ( sc->sc_response == slap_null_cb &&
1557                                 sc->sc_private ) {
1558                                 req_pwdexop_s *qpw = sc->sc_private;
1559                                 newpw = qpw->rs_new;
1560                                 oldpw = qpw->rs_old;
1561                                 is_pwdexop = 1;
1562                                 break;
1563                         }
1564                 }
1565         }
1566
1567         ppolicy_get( op, e, &pp );
1568
1569         for ( ml = op->orm_modlist,
1570                         pwmod = 0, mod_pw_only = 1,
1571                         deladd = 0, delmod = NULL,
1572                         addmod = NULL,
1573                         zapReset = 1;
1574                 ml != NULL; modtail = ml, ml = ml->sml_next )
1575         {
1576                 if ( ml->sml_desc == pp.ad ) {
1577                         pwmod = 1;
1578                         pwmop = ml->sml_op;
1579                         if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
1580                                 (ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
1581                         {
1582                                 deladd = 1;
1583                                 delmod = ml;
1584                         }
1585
1586                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1587                                 (ml->sml_op == LDAP_MOD_REPLACE))
1588                         {
1589                                 if ( ml->sml_values && !BER_BVISNULL( &ml->sml_values[0] )) {
1590                                         if ( deladd == 1 )
1591                                                 deladd = 2;
1592
1593                                         /* FIXME: there's no easy way to ensure
1594                                          * that add does not cause multiple
1595                                          * userPassword values; one way (that
1596                                          * would be consistent with the single
1597                                          * password constraint) would be to turn
1598                                          * add into replace); another would be
1599                                          * to disallow add.
1600                                          *
1601                                          * Let's check at least that a single value
1602                                          * is being added
1603                                          */
1604                                         if ( addmod || !BER_BVISNULL( &ml->sml_values[ 1 ] ) ) {
1605                                                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1606                                                 rs->sr_text = "Password policy only allows one password value";
1607                                                 goto return_results;
1608                                         }
1609
1610                                         addmod = ml;
1611                                 } else {
1612                                         /* replace can have no values, add cannot */
1613                                         assert( ml->sml_op == LDAP_MOD_REPLACE );
1614                                 }
1615                         }
1616
1617                 } else if ( !(ml->sml_flags & SLAP_MOD_INTERNAL) && !is_at_operational( ml->sml_desc->ad_type ) ) {
1618                         mod_pw_only = 0;
1619                         /* modifying something other than password */
1620                 }
1621
1622                 /*
1623                  * If there is a request to explicitly add a pwdReset
1624                  * attribute, then we suppress the normal behaviour on
1625                  * password change, which is to remove the pwdReset
1626                  * attribute.
1627                  *
1628                  * This enables an administrator to assign a new password
1629                  * and place a "must reset" flag on the entry, which will
1630                  * stay until the user explicitly changes his/her password.
1631                  */
1632                 if (ml->sml_desc == ad_pwdReset ) {
1633                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1634                                 (ml->sml_op == LDAP_MOD_REPLACE))
1635                                 zapReset = 0;
1636                 }
1637         }
1638
1639         if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
1640                 if ( dn_match( &op->o_conn->c_ndn,
1641                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1642                         Debug( LDAP_DEBUG_TRACE,
1643                                 "connection restricted to password changing only\n", 0, 0, 0 );
1644                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1645                         rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
1646                         pErr = PP_changeAfterReset;
1647                         goto return_results;
1648                 } else {
1649                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1650                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1651                 }
1652         }
1653
1654         /*
1655          * if we have a "safe password modify policy", then we need to check if we're doing
1656          * a delete (with the old password), followed by an add (with the new password).
1657          *
1658          * If we got just a delete with nothing else, just let it go. We also skip all the checks if
1659          * the root user is bound. Root can do anything, including avoid the policies.
1660          */
1661
1662         if (!pwmod) goto do_modify;
1663
1664         /*
1665          * Build the password history list in ascending time order
1666          * We need this, even if the user is root, in order to maintain
1667          * the pwdHistory operational attributes properly.
1668          */
1669         if (addmod && pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
1670                 struct berval oldpw;
1671                 time_t oldtime;
1672
1673                 for(i=0; ha->a_nvals[i].bv_val; i++) {
1674                         rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
1675                                 &oldtime, &oldpw );
1676
1677                         if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
1678
1679                         if (oldpw.bv_val) {
1680                                 add_to_pwd_history( &tl, oldtime, &oldpw,
1681                                         &(ha->a_nvals[i]) );
1682                                 oldpw.bv_val = NULL;
1683                                 oldpw.bv_len = 0;
1684                         }
1685                 }
1686                 for(p=tl; p; p=p->next, hsize++); /* count history size */
1687         }
1688
1689         if (be_isroot( op )) goto do_modify;
1690
1691         if (!pp.pwdAllowUserChange) {
1692                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1693                 rs->sr_text = "User alteration of password is not allowed";
1694                 pErr = PP_passwordModNotAllowed;
1695                 goto return_results;
1696         }
1697
1698         /* Just deleting? */
1699         if (!addmod) {
1700                 /* skip everything else */
1701                 pwmod = 0;
1702                 goto do_modify;
1703         }
1704
1705         /* This is a pwdModify exop that provided the old pw.
1706          * We need to create a Delete mod for this old pw and
1707          * let the matching value get found later
1708          */
1709         if (pp.pwdSafeModify && oldpw.bv_val ) {
1710                 ml = (Modifications *)ch_calloc( sizeof( Modifications ), 1 );
1711                 ml->sml_op = LDAP_MOD_DELETE;
1712                 ml->sml_flags = SLAP_MOD_INTERNAL;
1713                 ml->sml_desc = pp.ad;
1714                 ml->sml_type = pp.ad->ad_cname;
1715                 ml->sml_numvals = 1;
1716                 ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1717                 ber_dupbv( &ml->sml_values[0], &oldpw );
1718                 BER_BVZERO( &ml->sml_values[1] );
1719                 ml->sml_next = op->orm_modlist;
1720                 op->orm_modlist = ml;
1721                 delmod = ml;
1722                 deladd = 2;
1723         }
1724
1725         if (pp.pwdSafeModify && deladd != 2) {
1726                 Debug( LDAP_DEBUG_TRACE,
1727                         "change password must use DELETE followed by ADD/REPLACE\n",
1728                         0, 0, 0 );
1729                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1730                 rs->sr_text = "Must supply old password to be changed as well as new one";
1731                 pErr = PP_mustSupplyOldPassword;
1732                 goto return_results;
1733         }
1734
1735         /* Check age, but only if pwdReset is not TRUE */
1736         pa = attr_find( e->e_attrs, ad_pwdReset );
1737         if ((!pa || !bvmatch( &pa->a_nvals[0], &slap_true_bv )) &&
1738                 pp.pwdMinAge > 0) {
1739                 time_t pwtime = (time_t)-1, now;
1740                 int age;
1741
1742                 if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1743                         pwtime = parse_time( pa->a_nvals[0].bv_val );
1744                 now = slap_get_time();
1745                 age = (int)(now - pwtime);
1746                 if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
1747                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1748                         rs->sr_text = "Password is too young to change";
1749                         pErr = PP_passwordTooYoung;
1750                         goto return_results;
1751                 }
1752         }
1753
1754         /* pa is used in password history check below, be sure it's set */
1755         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
1756                 /*
1757                  * we have a password to check
1758                  */
1759                 bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
1760                 /* FIXME: no access checking? */
1761                 rc = slap_passwd_check( op, NULL, pa, bv, &txt );
1762                 if (rc != LDAP_SUCCESS) {
1763                         Debug( LDAP_DEBUG_TRACE,
1764                                 "old password check failed: %s\n", txt, 0, 0 );
1765
1766                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1767                         rs->sr_text = "Must supply correct old password to change to new one";
1768                         pErr = PP_mustSupplyOldPassword;
1769                         goto return_results;
1770
1771                 } else {
1772                         int i;
1773
1774                         /*
1775                          * replace the delete value with the (possibly hashed)
1776                          * value which is currently in the password.
1777                          */
1778                         for ( i = 0; !BER_BVISNULL( &delmod->sml_values[i] ); i++ ) {
1779                                 free( delmod->sml_values[i].bv_val );
1780                                 BER_BVZERO( &delmod->sml_values[i] );
1781                         }
1782                         free( delmod->sml_values );
1783                         delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
1784                         BER_BVZERO( &delmod->sml_values[1] );
1785                         ber_dupbv( &(delmod->sml_values[0]),  &(pa->a_nvals[0]) );
1786                 }
1787         }
1788
1789         bv = newpw.bv_val ? &newpw : &addmod->sml_values[0];
1790         if (pp.pwdCheckQuality > 0) {
1791
1792                 rc = check_password_quality( bv, &pp, &pErr, e, (char **)&txt );
1793                 if (rc != LDAP_SUCCESS) {
1794                         rs->sr_err = rc;
1795                         if ( txt ) {
1796                                 rs->sr_text = txt;
1797                                 free_txt = 1;
1798                         } else {
1799                                 rs->sr_text = "Password fails quality checking policy";
1800                         }
1801                         goto return_results;
1802                 }
1803         }
1804
1805         /* If pwdInHistory is zero, passwords may be reused */
1806         if (pa && pp.pwdInHistory > 0) {
1807                 /*
1808                  * Last check - the password history.
1809                  */
1810                 /* FIXME: no access checking? */
1811                 if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
1812                         /*
1813                          * This is bad - it means that the user is attempting
1814                          * to set the password to the same as the old one.
1815                          */
1816                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1817                         rs->sr_text = "Password is not being changed from existing value";
1818                         pErr = PP_passwordInHistory;
1819                         goto return_results;
1820                 }
1821
1822                 /*
1823                  * Iterate through the password history, and fail on any
1824                  * password matches.
1825                  */
1826                 at = *pa;
1827                 at.a_vals = cr;
1828                 cr[1].bv_val = NULL;
1829                 for(p=tl; p; p=p->next) {
1830                         cr[0] = p->pw;
1831                         /* FIXME: no access checking? */
1832                         rc = slap_passwd_check( op, NULL, &at, bv, &txt );
1833
1834                         if (rc != LDAP_SUCCESS) continue;
1835
1836                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1837                         rs->sr_text = "Password is in history of old passwords";
1838                         pErr = PP_passwordInHistory;
1839                         goto return_results;
1840                 }
1841         }
1842
1843 do_modify:
1844         if (pwmod) {
1845                 struct berval timestamp;
1846                 char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1847                 time_t now = slap_get_time();
1848
1849                 /* If the conn is restricted, set a callback to clear it
1850                  * if the pwmod succeeds
1851                  */
1852                 if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1853                         slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
1854                                 op->o_tmpmemctx );
1855                         sc->sc_next = op->o_callback;
1856                         /* Must use sc_response to insure we reset on success, before
1857                          * the client sees the response. Must use sc_cleanup to insure
1858                          * that it gets cleaned up if sc_response is not called.
1859                          */
1860                         sc->sc_response = ppolicy_mod_cb;
1861                         sc->sc_cleanup = ppolicy_mod_cb;
1862                         op->o_callback = sc;
1863                 }
1864
1865                 /*
1866                  * keep the necessary pwd.. operational attributes
1867                  * up to date.
1868                  */
1869
1870                 timestamp.bv_val = timebuf;
1871                 timestamp.bv_len = sizeof(timebuf);
1872                 slap_timestamp( &now, &timestamp );
1873
1874                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1875                 mods->sml_desc = ad_pwdChangedTime;
1876                 if (pwmop != LDAP_MOD_DELETE) {
1877                         mods->sml_op = LDAP_MOD_REPLACE;
1878                         mods->sml_numvals = 1;
1879                         mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1880                         ber_dupbv( &mods->sml_values[0], &timestamp );
1881                         BER_BVZERO( &mods->sml_values[1] );
1882                         assert( !BER_BVISNULL( &mods->sml_values[0] ) );
1883
1884                 } else {
1885                         mods->sml_op = LDAP_MOD_DELETE;
1886                 }
1887                 mods->sml_flags = SLAP_MOD_INTERNAL;
1888                 mods->sml_next = NULL;
1889                 modtail->sml_next = mods;
1890                 modtail = mods;
1891
1892                 if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
1893                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1894                         mods->sml_op = LDAP_MOD_DELETE;
1895                         mods->sml_desc = ad_pwdGraceUseTime;
1896                         mods->sml_flags = SLAP_MOD_INTERNAL;
1897                         mods->sml_next = NULL;
1898                         modtail->sml_next = mods;
1899                         modtail = mods;
1900                 }
1901
1902                 if (attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
1903                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1904                         mods->sml_op = LDAP_MOD_DELETE;
1905                         mods->sml_desc = ad_pwdAccountLockedTime;
1906                         mods->sml_flags = SLAP_MOD_INTERNAL;
1907                         mods->sml_next = NULL;
1908                         modtail->sml_next = mods;
1909                         modtail = mods;
1910                 }
1911
1912                 if (attr_find(e->e_attrs, ad_pwdFailureTime )) {
1913                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1914                         mods->sml_op = LDAP_MOD_DELETE;
1915                         mods->sml_desc = ad_pwdFailureTime;
1916                         mods->sml_flags = SLAP_MOD_INTERNAL;
1917                         mods->sml_next = NULL;
1918                         modtail->sml_next = mods;
1919                         modtail = mods;
1920                 }
1921
1922                 /* Delete the pwdReset attribute, since it's being reset */
1923                 if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
1924                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1925                         mods->sml_op = LDAP_MOD_DELETE;
1926                         mods->sml_desc = ad_pwdReset;
1927                         mods->sml_flags = SLAP_MOD_INTERNAL;
1928                         mods->sml_next = NULL;
1929                         modtail->sml_next = mods;
1930                         modtail = mods;
1931                 }
1932
1933                 if (pp.pwdInHistory > 0) {
1934                         if (hsize >= pp.pwdInHistory) {
1935                                 /*
1936                                  * We use the >= operator, since we are going to add
1937                                  * the existing password attribute value into the
1938                                  * history - thus the cardinality of history values is
1939                                  * about to rise by one.
1940                                  *
1941                                  * If this would push it over the limit of history
1942                                  * values (remembering - the password policy could have
1943                                  * changed since the password was last altered), we must
1944                                  * delete at least 1 value from the pwdHistory list.
1945                                  *
1946                                  * In fact, we delete '(#pwdHistory attrs - max pwd
1947                                  * history length) + 1' values, starting with the oldest.
1948                                  * This is easily evaluated, since the linked list is
1949                                  * created in ascending time order.
1950                                  */
1951                                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1952                                 mods->sml_op = LDAP_MOD_DELETE;
1953                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1954                                 mods->sml_desc = ad_pwdHistory;
1955                                 mods->sml_numvals = hsize - pp.pwdInHistory + 1;
1956                                 mods->sml_values = ch_calloc( sizeof( struct berval ),
1957                                         hsize - pp.pwdInHistory + 2 );
1958                                 BER_BVZERO( &mods->sml_values[ hsize - pp.pwdInHistory + 1 ] );
1959                                 for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
1960                                         BER_BVZERO( &mods->sml_values[i] );
1961                                         ber_dupbv( &(mods->sml_values[i]), &p->bv );
1962                                 }
1963                                 mods->sml_next = NULL;
1964                                 modtail->sml_next = mods;
1965                                 modtail = mods;
1966                         }
1967                         free_pwd_history_list( &tl );
1968
1969                         /*
1970                          * Now add the existing password into the history list.
1971                          * This will be executed even if the operation is to delete
1972                          * the password entirely.
1973                          *
1974                          * This isn't in the spec explicitly, but it seems to make
1975                          * sense that the password history list is the list of all
1976                          * previous passwords - even if they were deleted. Thus, if
1977                          * someone tries to add a historical password at some future
1978                          * point, it will fail.
1979                          */
1980                         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
1981                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1982                                 mods->sml_op = LDAP_MOD_ADD;
1983                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1984                                 mods->sml_type.bv_val = NULL;
1985                                 mods->sml_desc = ad_pwdHistory;
1986                                 mods->sml_nvalues = NULL;
1987                                 mods->sml_numvals = 1;
1988                                 mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
1989                                 mods->sml_values[ 1 ].bv_val = NULL;
1990                                 mods->sml_values[ 1 ].bv_len = 0;
1991                                 make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
1992                                 mods->sml_next = NULL;
1993                                 modtail->sml_next = mods;
1994                                 modtail = mods;
1995
1996                         } else {
1997                                 Debug( LDAP_DEBUG_TRACE,
1998                                 "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
1999                         }
2000                 }
2001
2002                 /*
2003                  * Controversial bit here. If the new password isn't hashed
2004                  * (ie, is cleartext), we probably should hash it according
2005                  * to the default hash. The reason for this is that we want
2006                  * to use the policy if possible, but if we hash the password
2007                  * before, then we're going to run into trouble when it
2008                  * comes time to check the password.
2009                  *
2010                  * Now, the right thing to do is to use the extended password
2011                  * modify operation, but not all software can do this,
2012                  * therefore it makes sense to hash the new password, now
2013                  * we know it passes the policy requirements.
2014                  *
2015                  * Of course, if the password is already hashed, then we
2016                  * leave it alone.
2017                  */
2018
2019                 if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
2020                         (password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS))
2021                 {
2022                         struct berval hpw, bv;
2023
2024                         slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
2025                         if (hpw.bv_val == NULL) {
2026                                         /*
2027                                          * hashing didn't work. Emit an error.
2028                                          */
2029                                 rs->sr_err = LDAP_OTHER;
2030                                 rs->sr_text = txt;
2031                                 goto return_results;
2032                         }
2033                         bv = addmod->sml_values[0];
2034                                 /* clear and discard the clear password */
2035                         memset(bv.bv_val, 0, bv.bv_len);
2036                         ber_memfree(bv.bv_val);
2037                         addmod->sml_values[0] = hpw;
2038                 }
2039         }
2040         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2041         be_entry_release_r( op, e );
2042         return SLAP_CB_CONTINUE;
2043
2044 return_results:
2045         free_pwd_history_list( &tl );
2046         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2047         be_entry_release_r( op, e );
2048         if ( send_ctrl ) {
2049                 ctrl = create_passcontrol( op, -1, -1, pErr );
2050                 oldctrls = add_passcontrol( op, rs, ctrl );
2051         }
2052         send_ldap_result( op, rs );
2053         if ( free_txt ) {
2054                 free( (char *)txt );
2055                 rs->sr_text = NULL;
2056         }
2057         if ( send_ctrl ) {
2058                 if ( is_pwdexop ) {
2059                         if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
2060                                 op->o_tmpfree( oldctrls, op->o_tmpmemctx );
2061                         }
2062                         oldctrls = NULL;
2063                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
2064
2065                 } else {
2066                         ctrls_cleanup( op, rs, oldctrls );
2067                 }
2068         }
2069         return rs->sr_err;
2070 }
2071
2072 static int
2073 ppolicy_parseCtrl(
2074         Operation *op,
2075         SlapReply *rs,
2076         LDAPControl *ctrl )
2077 {
2078         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
2079                 rs->sr_text = "passwordPolicyRequest control value not absent";
2080                 return LDAP_PROTOCOL_ERROR;
2081         }
2082         op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
2083                 ? SLAP_CONTROL_CRITICAL
2084                 : SLAP_CONTROL_NONCRITICAL;
2085
2086         return LDAP_SUCCESS;
2087 }
2088
2089 static int
2090 attrPretty(
2091         Syntax *syntax,
2092         struct berval *val,
2093         struct berval *out,
2094         void *ctx )
2095 {
2096         AttributeDescription *ad = NULL;
2097         const char *err;
2098         int code;
2099
2100         code = slap_bv2ad( val, &ad, &err );
2101         if ( !code ) {
2102                 ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
2103         }
2104         return code;
2105 }
2106
2107 static int
2108 attrNormalize(
2109         slap_mask_t use,
2110         Syntax *syntax,
2111         MatchingRule *mr,
2112         struct berval *val,
2113         struct berval *out,
2114         void *ctx )
2115 {
2116         AttributeDescription *ad = NULL;
2117         const char *err;
2118         int code;
2119
2120         code = slap_bv2ad( val, &ad, &err );
2121         if ( !code ) {
2122                 ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
2123         }
2124         return code;
2125 }
2126
2127 static int
2128 ppolicy_db_init(
2129         BackendDB *be,
2130         ConfigReply *cr
2131 )
2132 {
2133         slap_overinst *on = (slap_overinst *) be->bd_info;
2134
2135         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
2136                 /* do not allow slapo-ppolicy to be global by now (ITS#5858) */
2137                 if ( cr ){
2138                         snprintf( cr->msg, sizeof(cr->msg),
2139                                 "slapo-ppolicy cannot be global" );
2140                         fprintf( stderr, "%s\n", cr->msg );
2141                 }
2142                 return 1;
2143         }
2144
2145         /* Has User Schema been initialized yet? */
2146         if ( !pwd_UsSchema[0].ad[0] ) {
2147                 const char *err;
2148                 int i, code;
2149
2150                 for (i=0; pwd_UsSchema[i].def; i++) {
2151                         code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
2152                         if ( code ) {
2153                                 if ( cr ){
2154                                         snprintf( cr->msg, sizeof(cr->msg),
2155                                                 "User Schema load failed for attribute \"%s\". Error code %d: %s",
2156                                                 pwd_UsSchema[i].def, code, err );
2157                                         fprintf( stderr, "%s\n", cr->msg );
2158                                 }
2159                                 return code;
2160                         }
2161                 }
2162                 {
2163                         Syntax *syn;
2164                         MatchingRule *mr;
2165
2166                         syn = ch_malloc( sizeof( Syntax ));
2167                         *syn = *ad_pwdAttribute->ad_type->sat_syntax;
2168                         syn->ssyn_pretty = attrPretty;
2169                         ad_pwdAttribute->ad_type->sat_syntax = syn;
2170
2171                         mr = ch_malloc( sizeof( MatchingRule ));
2172                         *mr = *ad_pwdAttribute->ad_type->sat_equality;
2173                         mr->smr_normalize = attrNormalize;
2174                         ad_pwdAttribute->ad_type->sat_equality = mr;
2175                 }
2176         }
2177
2178         on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
2179
2180         if ( dtblsize && !pwcons ) {
2181                 /* accommodate for c_conn_idx == -1 */
2182                 pwcons = ch_calloc( sizeof(pw_conn), dtblsize + 1 );
2183                 pwcons++;
2184         }
2185
2186         return 0;
2187 }
2188
2189 static int
2190 ppolicy_db_open(
2191         BackendDB *be,
2192         ConfigReply *cr
2193 )
2194 {
2195         ov_count++;
2196         return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2197 }
2198
2199 static int
2200 ppolicy_close(
2201         BackendDB *be,
2202         ConfigReply *cr
2203 )
2204 {
2205         slap_overinst *on = (slap_overinst *) be->bd_info;
2206         pp_info *pi = on->on_bi.bi_private;
2207
2208         /* Perhaps backover should provide bi_destroy hooks... */
2209         ov_count--;
2210         if ( ov_count <=0 && pwcons ) {
2211                 pwcons--;
2212                 free( pwcons );
2213                 pwcons = NULL;
2214         }
2215         free( pi->def_policy.bv_val );
2216         free( pi );
2217
2218         return 0;
2219 }
2220
2221 static char *extops[] = {
2222         LDAP_EXOP_MODIFY_PASSWD,
2223         NULL
2224 };
2225
2226 static slap_overinst ppolicy;
2227
2228 int ppolicy_initialize()
2229 {
2230         int i, code;
2231
2232         for (i=0; pwd_OpSchema[i].def; i++) {
2233                 code = register_at( pwd_OpSchema[i].def, pwd_OpSchema[i].ad, 0 );
2234                 if ( code ) {
2235                         Debug( LDAP_DEBUG_ANY,
2236                                 "ppolicy_initialize: register_at failed\n", 0, 0, 0 );
2237                         return code;
2238                 }
2239                 /* Allow Manager to set these as needed */
2240                 if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
2241                         (*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
2242                                 SLAP_AT_MANAGEABLE;
2243                 }
2244         }
2245
2246         code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
2247                 SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
2248                 ppolicy_parseCtrl, &ppolicy_cid );
2249         if ( code != LDAP_SUCCESS ) {
2250                 fprintf( stderr, "Failed to register control %d\n", code );
2251                 return code;
2252         }
2253
2254         ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
2255
2256         ppolicy.on_bi.bi_type = "ppolicy";
2257         ppolicy.on_bi.bi_db_init = ppolicy_db_init;
2258         ppolicy.on_bi.bi_db_open = ppolicy_db_open;
2259         ppolicy.on_bi.bi_db_close = ppolicy_close;
2260
2261         ppolicy.on_bi.bi_op_add = ppolicy_add;
2262         ppolicy.on_bi.bi_op_bind = ppolicy_bind;
2263         ppolicy.on_bi.bi_op_compare = ppolicy_restrict;
2264         ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
2265         ppolicy.on_bi.bi_op_modify = ppolicy_modify;
2266         ppolicy.on_bi.bi_op_search = ppolicy_restrict;
2267         ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
2268
2269         ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
2270         code = config_register_schema( ppolicycfg, ppolicyocs );
2271         if ( code ) return code;
2272
2273         return overlay_register( &ppolicy );
2274 }
2275
2276 #if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
2277 int init_module(int argc, char *argv[]) {
2278         return ppolicy_initialize();
2279 }
2280 #endif
2281
2282 #endif  /* defined(SLAPD_OVER_PPOLICY) */