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 (!pp->pwdLockoutDuration)
 342                                 return 1;
 343
 344                         if ((then = parse_time( vals[0].bv_val )) == (time_t)0)
 345                                 return 1;
 346
 347                         now = slap_get_time();
 348
 349                         if (now < then + pp->pwdLockoutDuration)
 350                                 return 1;
 351
 352                         m = ch_calloc( sizeof(Modifications), 1 );
 353                         m->sml_op = LDAP_MOD_DELETE;
 354                         m->sml_flags = 0;
 355                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 356                         m->sml_desc = ad_pwdAccountLockedTime;
 357                         m->sml_next = *mod;
 358                         *mod = m;
 359                 }
 360         }
 361
 362         return 0;
 363 }
 364
 365 /* IMPLICIT TAGS, all context-specific */
 366 #define PPOLICY_WARNING 0xa0L   /* constructed + 0 */
 367 #define PPOLICY_ERROR 0x81L             /* primitive + 1 */
 368
 369 #define PPOLICY_EXPIRE 0x80L    /* primitive + 0 */
 370 #define PPOLICY_GRACE  0x81L    /* primitive + 1 */
 371
 372 static const char ppolicy_ctrl_oid[] = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
 373
 374 static LDAPControl *
 375 create_passcontrol( Operation *op, int exptime, int grace, LDAPPasswordPolicyError err )
 376 {
 377         BerElementBuffer berbuf, bb2;
 378         BerElement *ber = (BerElement *) &berbuf, *b2 = (BerElement *) &bb2;
 379         LDAPControl c = { 0 }, *cp;
 380         struct berval bv;
 381
 382         BER_BVZERO( &c.ldctl_value );
 383
 384         ber_init2( ber, NULL, LBER_USE_DER );
 385         ber_printf( ber, "{" /*}*/ );
 386
 387         if ( exptime >= 0 ) {
 388                 ber_init2( b2, NULL, LBER_USE_DER );
 389                 ber_printf( b2, "ti", PPOLICY_EXPIRE, exptime );
 390                 ber_flatten2( b2, &bv, 1 );
 391                 (void)ber_free_buf(b2);
 392                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 393                 ch_free( bv.bv_val );
 394         } else if ( grace > 0 ) {
 395                 ber_init2( b2, NULL, LBER_USE_DER );
 396                 ber_printf( b2, "ti", PPOLICY_GRACE, grace );
 397                 ber_flatten2( b2, &bv, 1 );
 398                 (void)ber_free_buf(b2);
 399                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 400                 ch_free( bv.bv_val );
 401         }
 402
 403         if (err != PP_noError ) {
 404                 ber_printf( ber, "te", PPOLICY_ERROR, err );
 405         }
 406         ber_printf( ber, /*{*/ "N}" );
 407
 408         if (ber_flatten2( ber, &c.ldctl_value, 0 ) == -1) {
 409                 return NULL;
 410         }
 411         cp = op->o_tmpalloc( sizeof( LDAPControl ) + c.ldctl_value.bv_len, op->o_tmpmemctx );
 412         cp->ldctl_oid = (char *)ppolicy_ctrl_oid;
 413         cp->ldctl_iscritical = 0;
 414         cp->ldctl_value.bv_val = (char *)&cp[1];
 415         cp->ldctl_value.bv_len = c.ldctl_value.bv_len;
 416         AC_MEMCPY( cp->ldctl_value.bv_val, c.ldctl_value.bv_val, c.ldctl_value.bv_len );
 417         (void)ber_free_buf(ber);
 418
 419         return cp;
 420 }
 421
 422 static LDAPControl **
 423 add_passcontrol( Operation *op, SlapReply *rs, LDAPControl *ctrl )
 424 {
 425         LDAPControl **ctrls, **oldctrls = rs->sr_ctrls;
 426         int n;
 427
 428         n = 0;
 429         if ( oldctrls ) {
 430                 for ( ; oldctrls[n]; n++ )
 431                         ;
 432         }
 433         n += 2;
 434
 435         ctrls = op->o_tmpcalloc( sizeof( LDAPControl * ), n, op->o_tmpmemctx );
 436
 437         n = 0;
 438         if ( oldctrls ) {
 439                 for ( ; oldctrls[n]; n++ ) {
 440                         ctrls[n] = oldctrls[n];
 441                 }
 442         }
 443         ctrls[n] = ctrl;
 444         ctrls[n+1] = NULL;
 445
 446         rs->sr_ctrls = ctrls;
 447
 448         return oldctrls;
 449 }
 450
 451 static void
 452 ppolicy_get( Operation *op, Entry *e, PassPolicy *pp )
 453 {
 454         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 455         pp_info *pi = on->on_bi.bi_private;
 456         Attribute *a;
 457         BerVarray vals;
 458         int rc;
 459         Entry *pe = NULL;
 460 #if 0
 461         const char *text;
 462 #endif
 463
 464         memset( pp, 0, sizeof(PassPolicy) );
 465
 466         pp->ad = slap_schema.si_ad_userPassword;
 467
 468         /* Users can change their own password by default */
 469         pp->pwdAllowUserChange = 1;
 470
 471         if ((a = attr_find( e->e_attrs, ad_pwdPolicySubentry )) == NULL) {
 472                 /*
 473                  * entry has no password policy assigned - use default
 474                  */
 475                 vals = &pi->def_policy;
 476                 if ( !vals->bv_val )
 477                         goto defaultpol;
 478         } else {
 479                 vals = a->a_nvals;
 480                 if (vals[0].bv_val == NULL) {
 481                         Debug( LDAP_DEBUG_ANY,
 482                                 "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
 483                         goto defaultpol;
 484                 }
 485         }
 486
 487         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 488         rc = be_entry_get_rw( op, vals, NULL, NULL, 0, &pe );
 489         op->o_bd->bd_info = (BackendInfo *)on;
 490
 491         if ( rc ) goto defaultpol;
 492
 493 #if 0   /* Only worry about userPassword for now */
 494         if ((a = attr_find( pe->e_attrs, ad_pwdAttribute )))
 495                 slap_bv2ad( &a->a_vals[0], &pp->ad, &text );
 496 #endif
 497
 498         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinAge ) )
 499                         && lutil_atoi( &pp->pwdMinAge, a->a_vals[0].bv_val ) != 0 )
 500                 goto defaultpol;
 501         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxAge ) )
 502                         && lutil_atoi( &pp->pwdMaxAge, a->a_vals[0].bv_val ) != 0 )
 503                 goto defaultpol;
 504         if ( ( a = attr_find( pe->e_attrs, ad_pwdInHistory ) )
 505                         && lutil_atoi( &pp->pwdInHistory, a->a_vals[0].bv_val ) != 0 )
 506                 goto defaultpol;
 507         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckQuality ) )
 508                         && lutil_atoi( &pp->pwdCheckQuality, a->a_vals[0].bv_val ) != 0 )
 509                 goto defaultpol;
 510         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinLength ) )
 511                         && lutil_atoi( &pp->pwdMinLength, a->a_vals[0].bv_val ) != 0 )
 512                 goto defaultpol;
 513         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxFailure ) )
 514                         && lutil_atoi( &pp->pwdMaxFailure, a->a_vals[0].bv_val ) != 0 )
 515                 goto defaultpol;
 516         if ( ( a = attr_find( pe->e_attrs, ad_pwdGraceAuthNLimit ) )
 517                         && lutil_atoi( &pp->pwdGraceAuthNLimit, a->a_vals[0].bv_val ) != 0 )
 518                 goto defaultpol;
 519         if ( ( a = attr_find( pe->e_attrs, ad_pwdExpireWarning ) )
 520                         && lutil_atoi( &pp->pwdExpireWarning, a->a_vals[0].bv_val ) != 0 )
 521                 goto defaultpol;
 522         if ( ( a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval ) )
 523                         && lutil_atoi( &pp->pwdFailureCountInterval, a->a_vals[0].bv_val ) != 0 )
 524                 goto defaultpol;
 525         if ( ( a = attr_find( pe->e_attrs, ad_pwdLockoutDuration ) )
 526                         && lutil_atoi( &pp->pwdLockoutDuration, a->a_vals[0].bv_val ) != 0 )
 527                 goto defaultpol;
 528
 529         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckModule ) ) ) {
 530                 strncpy( pp->pwdCheckModule, a->a_vals[0].bv_val,
 531                         sizeof(pp->pwdCheckModule) );
 532                 pp->pwdCheckModule[sizeof(pp->pwdCheckModule)-1] = '\0';
 533         }
 534
 535         if ((a = attr_find( pe->e_attrs, ad_pwdLockout )))
 536                 pp->pwdLockout = bvmatch( &a->a_nvals[0], &slap_true_bv );
 537         if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
 538                 pp->pwdMustChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 539         if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
 540                 pp->pwdAllowUserChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 541         if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
 542                 pp->pwdSafeModify = bvmatch( &a->a_nvals[0], &slap_true_bv );
 543
 544         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 545         be_entry_release_r( op, pe );
 546         op->o_bd->bd_info = (BackendInfo *)on;
 547
 548         return;
 549
 550 defaultpol:
 551         Debug( LDAP_DEBUG_TRACE,
 552                 "ppolicy_get: using default policy\n", 0, 0, 0 );
 553         return;
 554 }
 555
 556 static int
 557 password_scheme( struct berval *cred, struct berval *sch )
 558 {
 559         int e;
 560
 561         assert( cred != NULL );
 562
 563         if (sch) {
 564                 sch->bv_val = NULL;
 565                 sch->bv_len = 0;
 566         }
 567
 568         if ((cred->bv_len == 0) || (cred->bv_val == NULL) ||
 569                 (cred->bv_val[0] != '{')) return LDAP_OTHER;
 570
 571         for(e = 1; cred->bv_val[e] && cred->bv_val[e] != '}'; e++);
 572         if (cred->bv_val[e]) {
 573                 int rc;
 574                 rc = lutil_passwd_scheme( cred->bv_val );
 575                 if (rc) {
 576                         if (sch) {
 577                                 sch->bv_val = cred->bv_val;
 578                                 sch->bv_len = e;
 579                         }
 580                         return LDAP_SUCCESS;
 581                 }
 582         }
 583         return LDAP_OTHER;
 584 }
 585
 586 static int
 587 check_password_quality( struct berval *cred, PassPolicy *pp, LDAPPasswordPolicyError *err, Entry *e, char **txt )
 588 {
 589         int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
 590         char *ptr = cred->bv_val;
 591         struct berval sch;
 592
 593         assert( cred != NULL );
 594         assert( pp != NULL );
 595         assert( txt != NULL );
 596
 597         *txt = NULL;
 598
 599         if ((cred->bv_len == 0) || (pp->pwdMinLength > cred->bv_len)) {
 600                 rc = LDAP_CONSTRAINT_VIOLATION;
 601                 if ( err ) *err = PP_passwordTooShort;
 602                 return rc;
 603         }
 604
 605         /*
 606          * We need to know if the password is already hashed - if so
 607          * what scheme is it. The reason being that the "hash" of
 608          * {cleartext} still allows us to check the password.
 609          */
 610         rc = password_scheme( cred, &sch );
 611         if (rc == LDAP_SUCCESS) {
 612                 if ((sch.bv_val) && (strncasecmp( sch.bv_val, "{cleartext}",
 613                         sch.bv_len ) == 0)) {
 614                         /*
 615                          * We can check the cleartext "hash"
 616                          */
 617                         ptr = cred->bv_val + sch.bv_len;
 618                 } else {
 619                         /* everything else, we can't check */
 620                         if (pp->pwdCheckQuality == 2) {
 621                                 rc = LDAP_CONSTRAINT_VIOLATION;
 622                                 if (err) *err = PP_insufficientPasswordQuality;
 623                                 return rc;
 624                         }
 625                         /*
 626                          * We can't check the syntax of the password, but it's not
 627                          * mandatory (according to the policy), so we return success.
 628                          */
 629
 630                         return LDAP_SUCCESS;
 631                 }
 632         }
 633
 634         rc = LDAP_SUCCESS;
 635
 636         if (pp->pwdCheckModule[0]) {
 637 #ifdef SLAPD_MODULES
 638                 lt_dlhandle mod;
 639                 const char *err;
 640
 641                 if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
 642                         err = lt_dlerror();
 643
 644                         Debug(LDAP_DEBUG_ANY,
 645                         "check_password_quality: lt_dlopen failed: (%s) %s.\n",
 646                                 pp->pwdCheckModule, err, 0 );
 647                         ok = LDAP_OTHER; /* internal error */
 648                 } else {
 649                         /* FIXME: the error message ought to be passed thru a
 650                          * struct berval, with preallocated buffer and size
 651                          * passed in. Module can still allocate a buffer for
 652                          * it if the provided one is too small.
 653                          */
 654                         int (*prog)( char *passwd, char **text, Entry *ent );
 655
 656                         if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
 657                                 err = lt_dlerror();
 658
 659                                 Debug(LDAP_DEBUG_ANY,
 660                                         "check_password_quality: lt_dlsym failed: (%s) %s.\n",
 661                                         pp->pwdCheckModule, err, 0 );
 662                                 ok = LDAP_OTHER;
 663                         } else {
 664                                 ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
 665                                 ok = prog( ptr, txt, e );
 666                                 ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
 667                                 if (ok != LDAP_SUCCESS) {
 668                                         Debug(LDAP_DEBUG_ANY,
 669                                                 "check_password_quality: module error: (%s) %s.[%d]\n",
 670                                                 pp->pwdCheckModule, *txt ? *txt : "", ok );
 671                                 }
 672                         }
 673
 674                         lt_dlclose( mod );
 675                 }
 676 #else
 677         Debug(LDAP_DEBUG_ANY, "check_password_quality: external modules not "
 678                 "supported. pwdCheckModule ignored.\n", 0, 0, 0);
 679 #endif /* SLAPD_MODULES */
 680         }
 681
 682
 683         if (ok != LDAP_SUCCESS) {
 684                 rc = LDAP_CONSTRAINT_VIOLATION;
 685                 if (err) *err = PP_insufficientPasswordQuality;
 686         }
 687
 688         return rc;
 689 }
 690
 691 static int
 692 parse_pwdhistory( struct berval *bv, char **oid, time_t *oldtime, struct berval *oldpw )
 693 {
 694         char *ptr;
 695         struct berval nv, npw;
 696         ber_len_t i, j;
 697
 698         assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
 699
 700         if ( oid ) {
 701                 *oid = 0;
 702         }
 703         *oldtime = (time_t)-1;
 704         BER_BVZERO( oldpw );
 705
 706         ber_dupbv( &nv, bv );
 707
 708         /* first get the time field */
 709         for ( i = 0; (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 710                 ;
 711         if ( i == nv.bv_len ) {
 712                 goto exit_failure; /* couldn't locate the '#' separator */
 713         }
 714         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 715         ptr = nv.bv_val;
 716         *oldtime = parse_time( ptr );
 717         if (*oldtime == (time_t)-1) {
 718                 goto exit_failure;
 719         }
 720
 721         /* get the OID field */
 722         for (ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 723                 ;
 724         if ( i == nv.bv_len ) {
 725                 goto exit_failure; /* couldn't locate the '#' separator */
 726         }
 727         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 728         if ( oid ) {
 729                 *oid = ber_strdup( ptr );
 730         }
 731
 732         /* get the length field */
 733         for ( ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 734                 ;
 735         if ( i == nv.bv_len ) {
 736                 goto exit_failure; /* couldn't locate the '#' separator */
 737         }
 738         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 739         oldpw->bv_len = strtol( ptr, NULL, 10 );
 740         if (errno == ERANGE) {
 741                 goto exit_failure;
 742         }
 743
 744         /* lastly, get the octets of the string */
 745         for ( j = i, ptr = &(nv.bv_val[i]); i < nv.bv_len; i++ )
 746                 ;
 747         if ( i - j != oldpw->bv_len) {
 748                 goto exit_failure; /* length is wrong */
 749         }
 750
 751         npw.bv_val = ptr;
 752         npw.bv_len = oldpw->bv_len;
 753         ber_dupbv( oldpw, &npw );
 754         ber_memfree( nv.bv_val );
 755
 756         return LDAP_SUCCESS;
 757
 758 exit_failure:;
 759         if ( oid && *oid ) {
 760                 ber_memfree(*oid);
 761                 *oid = NULL;
 762         }
 763         if ( oldpw->bv_val ) {
 764                 ber_memfree( oldpw->bv_val);
 765                 BER_BVZERO( oldpw );
 766         }
 767         ber_memfree( nv.bv_val );
 768
 769         return LDAP_OTHER;
 770 }
 771
 772 static void
 773 add_to_pwd_history( pw_hist **l, time_t t,
 774                     struct berval *oldpw, struct berval *bv )
 775 {
 776         pw_hist *p, *p1, *p2;
 777
 778         if (!l) return;
 779
 780         p = ch_malloc( sizeof( pw_hist ));
 781         p->pw = *oldpw;
 782         ber_dupbv( &p->bv, bv );
 783         p->t = t;
 784         p->next = NULL;
 785
 786         if (*l == NULL) {
 787                 /* degenerate case */
 788                 *l = p;
 789                 return;
 790         }
 791         /*
 792          * advance p1 and p2 such that p1 is the node before the
 793          * new one, and p2 is the node after it
 794          */
 795         for (p1 = NULL, p2 = *l; p2 && p2->t <= t; p1 = p2, p2=p2->next );
 796         p->next = p2;
 797         if (p1 == NULL) { *l = p; return; }
 798         p1->next = p;
 799 }
 800
 801 #ifndef MAX_PWD_HISTORY_SZ
 802 #define MAX_PWD_HISTORY_SZ 1024
 803 #endif /* MAX_PWD_HISTORY_SZ */
 804
 805 static void
 806 make_pwd_history_value( char *timebuf, struct berval *bv, Attribute *pa )
 807 {
 808         char str[ MAX_PWD_HISTORY_SZ ];
 809         int nlen;
 810
 811         snprintf( str, MAX_PWD_HISTORY_SZ,
 812                   "%s#%s#%lu#", timebuf,
 813                   pa->a_desc->ad_type->sat_syntax->ssyn_oid,
 814                   (unsigned long) pa->a_nvals[0].bv_len );
 815         str[MAX_PWD_HISTORY_SZ-1] = 0;
 816         nlen = strlen(str);
 817
 818         /*
 819          * We have to assume that the string is a string of octets,
 820          * not readable characters. In reality, yes, it probably is
 821          * a readable (ie, base64) string, but we can't count on that
 822          * Hence, while the first 3 fields of the password history
 823          * are definitely readable (a timestamp, an OID and an integer
 824          * length), the remaining octets of the actual password
 825          * are deemed to be binary data.
 826          */
 827         AC_MEMCPY( str + nlen, pa->a_nvals[0].bv_val, pa->a_nvals[0].bv_len );
 828         nlen += pa->a_nvals[0].bv_len;
 829         bv->bv_val = ch_malloc( nlen + 1 );
 830         AC_MEMCPY( bv->bv_val, str, nlen );
 831         bv->bv_val[nlen] = '\0';
 832         bv->bv_len = nlen;
 833 }
 834
 835 static void
 836 free_pwd_history_list( pw_hist **l )
 837 {
 838         pw_hist *p;
 839
 840         if (!l) return;
 841         p = *l;
 842         while (p) {
 843                 pw_hist *pp = p->next;
 844
 845                 free(p->pw.bv_val);
 846                 free(p->bv.bv_val);
 847                 free(p);
 848                 p = pp;
 849         }
 850         *l = NULL;
 851 }
 852
 853 typedef struct ppbind {
 854         slap_overinst *on;
 855         int send_ctrl;
 856         LDAPControl **oldctrls;
 857         Modifications *mod;
 858         LDAPPasswordPolicyError pErr;
 859         PassPolicy pp;
 860 } ppbind;
 861
 862 static void
 863 ctrls_cleanup( Operation *op, SlapReply *rs, LDAPControl **oldctrls )
 864 {
 865         int n;
 866
 867         assert( rs->sr_ctrls != NULL );
 868         assert( rs->sr_ctrls[0] != NULL );
 869
 870         for ( n = 0; rs->sr_ctrls[n]; n++ ) {
 871                 if ( rs->sr_ctrls[n]->ldctl_oid == ppolicy_ctrl_oid ) {
 872                         op->o_tmpfree( rs->sr_ctrls[n], op->o_tmpmemctx );
 873                         rs->sr_ctrls[n] = (LDAPControl *)(-1);
 874                         break;
 875                 }
 876         }
 877
 878         if ( rs->sr_ctrls[n] == NULL ) {
 879                 /* missed? */
 880         }
 881
 882         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 883
 884         rs->sr_ctrls = oldctrls;
 885 }
 886
 887 static int
 888 ppolicy_ctrls_cleanup( Operation *op, SlapReply *rs )
 889 {
 890         ppbind *ppb = op->o_callback->sc_private;
 891         if ( ppb->send_ctrl ) {
 892                 ctrls_cleanup( op, rs, ppb->oldctrls );
 893         }
 894         return SLAP_CB_CONTINUE;
 895 }
 896
 897 static int
 898 ppolicy_bind_response( Operation *op, SlapReply *rs )
 899 {
 900         ppbind *ppb = op->o_callback->sc_private;
 901         slap_overinst *on = ppb->on;
 902         Modifications *mod = ppb->mod, *m;
 903         int pwExpired = 0;
 904         int ngut = -1, warn = -1, age, rc;
 905         Attribute *a;
 906         time_t now, pwtime = (time_t)-1;
 907         char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 908         struct berval timestamp;
 909         BackendInfo *bi = op->o_bd->bd_info;
 910         Entry *e;
 911
 912         /* If we already know it's locked, just get on with it */
 913         if ( ppb->pErr != PP_noError ) {
 914                 goto locked;
 915         }
 916
 917         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 918         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 919         op->o_bd->bd_info = bi;
 920
 921         if ( rc != LDAP_SUCCESS ) {
 922                 return SLAP_CB_CONTINUE;
 923         }
 924
 925         now = slap_get_time(); /* stored for later consideration */
 926         timestamp.bv_val = nowstr;
 927         timestamp.bv_len = sizeof(nowstr);
 928         slap_timestamp( &now, &timestamp );
 929
 930         if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
 931                 int i = 0, fc = 0;
 932
 933                 m = ch_calloc( sizeof(Modifications), 1 );
 934                 m->sml_op = LDAP_MOD_ADD;
 935                 m->sml_flags = 0;
 936                 m->sml_type = ad_pwdFailureTime->ad_cname;
 937                 m->sml_desc = ad_pwdFailureTime;
 938                 m->sml_numvals = 1;
 939                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 940                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 941
 942                 ber_dupbv( &m->sml_values[0], &timestamp );
 943                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 944                 m->sml_next = mod;
 945                 mod = m;
 946
 947                 /*
 948                  * Count the pwdFailureTimes - if it's
 949                  * greater than the policy pwdMaxFailure,
 950                  * then lock the account.
 951                  */
 952                 if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
 953                         for(i=0; a->a_nvals[i].bv_val; i++) {
 954
 955                                 /*
 956                                  * If the interval is 0, then failures
 957                                  * stay on the record until explicitly
 958                                  * reset by successful authentication.
 959                                  */
 960                                 if (ppb->pp.pwdFailureCountInterval == 0) {
 961                                         fc++;
 962                                 } else if (now <=
 963                                                         parse_time(a->a_nvals[i].bv_val) +
 964                                                         ppb->pp.pwdFailureCountInterval) {
 965
 966                                         fc++;
 967                                 }
 968                                 /*
 969                                  * We only count those failures
 970                                  * which are not due to expire.
 971                                  */
 972                         }
 973                 }
 974
 975                 if ((ppb->pp.pwdMaxFailure > 0) &&
 976                         (fc >= ppb->pp.pwdMaxFailure - 1)) {
 977
 978                         /*
 979                          * We subtract 1 from the failure max
 980                          * because the new failure entry hasn't
 981                          * made it to the entry yet.
 982                          */
 983                         m = ch_calloc( sizeof(Modifications), 1 );
 984                         m->sml_op = LDAP_MOD_REPLACE;
 985                         m->sml_flags = 0;
 986                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 987                         m->sml_desc = ad_pwdAccountLockedTime;
 988                         m->sml_numvals = 1;
 989                         m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 990                         m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 991                         ber_dupbv( &m->sml_values[0], &timestamp );
 992                         ber_dupbv( &m->sml_nvalues[0], &timestamp );
 993                         m->sml_next = mod;
 994                         mod = m;
 995                 }
 996         } else if ( rs->sr_err == LDAP_SUCCESS ) {
 997                 if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
 998                         pwtime = parse_time( a->a_nvals[0].bv_val );
 999
1000                 /* delete all pwdFailureTimes */
1001                 if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
1002                         m = ch_calloc( sizeof(Modifications), 1 );
1003                         m->sml_op = LDAP_MOD_DELETE;
1004                         m->sml_flags = 0;
1005                         m->sml_type = ad_pwdFailureTime->ad_cname;
1006                         m->sml_desc = ad_pwdFailureTime;
1007                         m->sml_next = mod;
1008                         mod = m;
1009                 }
1010
1011                 /*
1012                  * check to see if the password must be changed
1013                  */
1014                 if ( ppb->pp.pwdMustChange &&
1015                         (a = attr_find( e->e_attrs, ad_pwdReset )) &&
1016                         bvmatch( &a->a_nvals[0], &slap_true_bv ) )
1017                 {
1018                         /*
1019                          * need to inject client controls here to give
1020                          * more information. For the moment, we ensure
1021                          * that we are disallowed from doing anything
1022                          * other than change password.
1023                          */
1024                         ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
1025                                 &op->o_conn->c_ndn );
1026
1027                         ppb->pErr = PP_changeAfterReset;
1028
1029                 } else {
1030                         /*
1031                          * the password does not need to be changed, so
1032                          * we now check whether the password has expired.
1033                          *
1034                          * We can skip this bit if passwords don't age in
1035                          * the policy. Also, if there was no pwdChangedTime
1036                          * attribute in the entry, the password never expires.
1037                          */
1038                         if (ppb->pp.pwdMaxAge == 0) goto grace;
1039
1040                         if (pwtime != (time_t)-1) {
1041                                 /*
1042                                  * Check: was the last change time of
1043                                  * the password older than the maximum age
1044                                  * allowed. (Ignore case 2 from I-D, it's just silly.)
1045                                  */
1046                                 if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
1047                         }
1048                 }
1049
1050 grace:
1051                 if (!pwExpired) goto check_expiring_password;
1052
1053                 if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
1054                         ngut = ppb->pp.pwdGraceAuthNLimit;
1055                 else {
1056                         for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
1057                         ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
1058                 }
1059
1060                 /*
1061                  * ngut is the number of remaining grace logins
1062                  */
1063                 Debug( LDAP_DEBUG_ANY,
1064                         "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
1065                         e->e_name.bv_val, ngut, 0);
1066
1067                 if (ngut < 1) {
1068                         ppb->pErr = PP_passwordExpired;
1069                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
1070                         goto done;
1071                 }
1072
1073                 /*
1074                  * Add a grace user time to the entry
1075                  */
1076                 m = ch_calloc( sizeof(Modifications), 1 );
1077                 m->sml_op = LDAP_MOD_ADD;
1078                 m->sml_flags = 0;
1079                 m->sml_type = ad_pwdGraceUseTime->ad_cname;
1080                 m->sml_desc = ad_pwdGraceUseTime;
1081                 m->sml_numvals = 1;
1082                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
1083                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
1084                 ber_dupbv( &m->sml_values[0], &timestamp );
1085                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
1086                 m->sml_next = mod;
1087                 mod = m;
1088
1089 check_expiring_password:
1090                 /*
1091                  * Now we need to check to see
1092                  * if it is about to expire, and if so, should the user
1093                  * be warned about it in the password policy control.
1094                  *
1095                  * If the password has expired, and we're in the grace period, then
1096                  * we don't need to do this bit. Similarly, if we don't have password
1097                  * aging, then there's no need to do this bit either.
1098                  */
1099                 if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
1100                         goto done;
1101
1102                 age = (int)(now - pwtime);
1103
1104                 /*
1105                  * We know that there is a password Change Time attribute - if
1106                  * there wasn't, then the pwdExpired value would be true, unless
1107                  * there is no password aging - and if there is no password aging,
1108                  * then this section isn't called anyway - you can't have an
1109                  * expiring password if there's no limit to expire.
1110                  */
1111                 if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
1112                         /*
1113                          * Set the warning value.
1114                          */
1115                         warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
1116                         if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
1117
1118                         Debug( LDAP_DEBUG_ANY,
1119                                 "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
1120                                 op->o_req_dn.bv_val, warn, 0 );
1121                 }
1122         }
1123
1124 done:
1125         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1126         be_entry_release_r( op, e );
1127
1128 locked:
1129         if ( mod ) {
1130                 Operation op2 = *op;
1131                 SlapReply r2 = { REP_RESULT };
1132                 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
1133                 pp_info *pi = on->on_bi.bi_private;
1134                 LDAPControl c, *ca[2];
1135
1136                 op2.o_tag = LDAP_REQ_MODIFY;
1137                 op2.o_callback = &cb;
1138                 op2.orm_modlist = mod;
1139                 op2.o_dn = op->o_bd->be_rootdn;
1140                 op2.o_ndn = op->o_bd->be_rootndn;
1141
1142                 /* If this server is a shadow and forward_updates is true,
1143                  * use the frontend to perform this modify. That will trigger
1144                  * the update referral, which can then be forwarded by the
1145                  * chain overlay. Obviously the updateref and chain overlay
1146                  * must be configured appropriately for this to be useful.
1147                  */
1148                 if ( SLAP_SHADOW( op->o_bd ) && pi->forward_updates ) {
1149                         op2.o_bd = frontendDB;
1150
1151                         /* Must use Relax control since these are no-user-mod */
1152                         op2.o_relax = SLAP_CONTROL_CRITICAL;
1153                         op2.o_ctrls = ca;
1154                         ca[0] = &c;
1155                         ca[1] = NULL;
1156                         BER_BVZERO( &c.ldctl_value );
1157                         c.ldctl_iscritical = 1;
1158                         c.ldctl_oid = LDAP_CONTROL_RELAX;
1159                 } else {
1160                         op2.o_bd->bd_info = (BackendInfo *)on->on_info;
1161                 }
1162                 rc = op2.o_bd->be_modify( &op2, &r2 );
1163                 slap_mods_free( mod, 1 );
1164         }
1165
1166         if ( ppb->send_ctrl ) {
1167                 LDAPControl *ctrl = NULL;
1168                 pp_info *pi = on->on_bi.bi_private;
1169
1170                 /* Do we really want to tell that the account is locked? */
1171                 if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
1172                         ppb->pErr = PP_noError;
1173                 }
1174                 ctrl = create_passcontrol( op, warn, ngut, ppb->pErr );
1175                 ppb->oldctrls = add_passcontrol( op, rs, ctrl );
1176                 op->o_callback->sc_cleanup = ppolicy_ctrls_cleanup;
1177         }
1178         op->o_bd->bd_info = bi;
1179         return SLAP_CB_CONTINUE;
1180 }
1181
1182 static int
1183 ppolicy_bind( Operation *op, SlapReply *rs )
1184 {
1185         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1186
1187         /* Reset lockout status on all Bind requests */
1188         if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1189                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1190                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1191         }
1192
1193         /* Root bypasses policy */
1194         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
1195                 Entry *e;
1196                 int rc;
1197                 ppbind *ppb;
1198                 slap_callback *cb;
1199
1200                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1201                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1202
1203                 if ( rc != LDAP_SUCCESS ) {
1204                         return SLAP_CB_CONTINUE;
1205                 }
1206
1207                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1208                         1, op->o_tmpmemctx );
1209                 ppb = (ppbind *)(cb+1);
1210                 ppb->on = on;
1211                 ppb->pErr = PP_noError;
1212
1213                 /* Setup a callback so we can munge the result */
1214
1215                 cb->sc_response = ppolicy_bind_response;
1216                 cb->sc_next = op->o_callback->sc_next;
1217                 cb->sc_private = ppb;
1218                 op->o_callback->sc_next = cb;
1219
1220                 /* Did we receive a password policy request control? */
1221                 if ( op->o_ctrlflag[ppolicy_cid] ) {
1222                         ppb->send_ctrl = 1;
1223                 }
1224
1225                 op->o_bd->bd_info = (BackendInfo *)on;
1226                 ppolicy_get( op, e, &ppb->pp );
1227
1228                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1229
1230                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1231                 be_entry_release_r( op, e );
1232
1233                 if ( rc ) {
1234                         /* This will be the Draft 8 response, Unwilling is bogus */
1235                         ppb->pErr = PP_accountLocked;
1236                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
1237                         return rs->sr_err;
1238                 }
1239
1240         }
1241
1242         return SLAP_CB_CONTINUE;
1243 }
1244
1245 /* Reset the restricted info for the next session on this connection */
1246 static int
1247 ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
1248 {
1249         if ( !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
1250                 ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
1251                 BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
1252         }
1253         return SLAP_CB_CONTINUE;
1254 }
1255
1256 /* Check if this connection is restricted */
1257 static int
1258 ppolicy_restrict(
1259         Operation *op,
1260         SlapReply *rs )
1261 {
1262         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1263         int send_ctrl = 0;
1264
1265         /* Did we receive a password policy request control? */
1266         if ( op->o_ctrlflag[ppolicy_cid] ) {
1267                 send_ctrl = 1;
1268         }
1269
1270         if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1271                 LDAPControl **oldctrls;
1272                 /* if the current authcDN doesn't match the one we recorded,
1273                  * then an intervening Bind has succeeded and the restriction
1274                  * no longer applies. (ITS#4516)
1275                  */
1276                 if ( !dn_match( &op->o_conn->c_ndn,
1277                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1278                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1279                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1280                         return SLAP_CB_CONTINUE;
1281                 }
1282
1283                 Debug( LDAP_DEBUG_TRACE,
1284                         "connection restricted to password changing only\n", 0, 0, 0);
1285                 if ( send_ctrl ) {
1286                         LDAPControl *ctrl = NULL;
1287                         ctrl = create_passcontrol( op, -1, -1, PP_changeAfterReset );
1288                         oldctrls = add_passcontrol( op, rs, ctrl );
1289                 }
1290                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1291                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
1292                         "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
1293                 if ( send_ctrl ) {
1294                         ctrls_cleanup( op, rs, oldctrls );
1295                 }
1296                 return rs->sr_err;
1297         }
1298
1299         return SLAP_CB_CONTINUE;
1300 }
1301
1302 static int
1303 ppolicy_add(
1304         Operation *op,
1305         SlapReply *rs )
1306 {
1307         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1308         pp_info *pi = on->on_bi.bi_private;
1309         PassPolicy pp;
1310         Attribute *pa;
1311         const char *txt;
1312
1313         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1314                 return rs->sr_err;
1315
1316         /* If this is a replica, assume the master checked everything */
1317         if ( be_shadow_update( op ))
1318                 return SLAP_CB_CONTINUE;
1319
1320         /* Check for password in entry */
1321         if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
1322                 slap_schema.si_ad_userPassword )))
1323         {
1324                 assert( pa->a_vals != NULL );
1325                 assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
1326
1327                 if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
1328                         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
1329                         return rs->sr_err;
1330                 }
1331
1332                 /*
1333                  * new entry contains a password - if we're not the root user
1334                  * then we need to check that the password fits in with the
1335                  * security policy for the new entry.
1336                  */
1337                 ppolicy_get( op, op->ora_e, &pp );
1338                 if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
1339                         struct berval *bv = &(pa->a_vals[0]);
1340                         int rc, send_ctrl = 0;
1341                         LDAPPasswordPolicyError pErr = PP_noError;
1342                         char *txt;
1343
1344                         /* Did we receive a password policy request control? */
1345                         if ( op->o_ctrlflag[ppolicy_cid] ) {
1346                                 send_ctrl = 1;
1347                         }
1348                         rc = check_password_quality( bv, &pp, &pErr, op->ora_e, &txt );
1349                         if (rc != LDAP_SUCCESS) {
1350                                 LDAPControl **oldctrls = NULL;
1351                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1352                                 if ( send_ctrl ) {
1353                                         LDAPControl *ctrl = NULL;
1354                                         ctrl = create_passcontrol( op, -1, -1, pErr );
1355                                         oldctrls = add_passcontrol( op, rs, ctrl );
1356                                 }
1357                                 send_ldap_error( op, rs, rc, txt ? txt : "Password fails quality checking policy" );
1358                                 if ( txt ) {
1359                                         free( txt );
1360                                 }
1361                                 if ( send_ctrl ) {
1362                                         ctrls_cleanup( op, rs, oldctrls );
1363                                 }
1364                                 return rs->sr_err;
1365                         }
1366                 }
1367                         /*
1368                          * A controversial bit. We hash cleartext
1369                          * passwords provided via add and modify operations
1370                          * You're not really supposed to do this, since
1371                          * the X.500 model says "store attributes" as they
1372                          * get provided. By default, this is what we do
1373                          *
1374                          * But if the hash_passwords flag is set, we hash
1375                          * any cleartext password attribute values via the
1376                          * default password hashing scheme.
1377                          */
1378                 if ((pi->hash_passwords) &&
1379                         (password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
1380                         struct berval hpw;
1381
1382                         slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
1383                         if (hpw.bv_val == NULL) {
1384                                 /*
1385                                  * hashing didn't work. Emit an error.
1386                                  */
1387                                 rs->sr_err = LDAP_OTHER;
1388                                 rs->sr_text = txt;
1389                                 send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
1390                                 return rs->sr_err;
1391                         }
1392
1393                         memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
1394                         ber_memfree( pa->a_vals[0].bv_val );
1395                         pa->a_vals[0].bv_val = hpw.bv_val;
1396                         pa->a_vals[0].bv_len = hpw.bv_len;
1397                 }
1398
1399                 /* If password aging is in effect, set the pwdChangedTime */
1400                 if ( pp.pwdMaxAge || pp.pwdMinAge ) {
1401                         struct berval timestamp;
1402                         char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1403                         time_t now = slap_get_time();
1404
1405                         timestamp.bv_val = timebuf;
1406                         timestamp.bv_len = sizeof(timebuf);
1407                         slap_timestamp( &now, &timestamp );
1408
1409                         attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
1410                 }
1411         }
1412         return SLAP_CB_CONTINUE;
1413 }
1414
1415 static int
1416 ppolicy_mod_cb( Operation *op, SlapReply *rs )
1417 {
1418         slap_callback *sc = op->o_callback;
1419         op->o_callback = sc->sc_next;
1420         if ( rs->sr_err == LDAP_SUCCESS ) {
1421                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1422                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1423         }
1424         op->o_tmpfree( sc, op->o_tmpmemctx );
1425         return SLAP_CB_CONTINUE;
1426 }
1427
1428 static int
1429 ppolicy_modify( Operation *op, SlapReply *rs )
1430 {
1431         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1432         pp_info                 *pi = on->on_bi.bi_private;
1433         int                     i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
1434                                 hsize = 0;
1435         PassPolicy              pp;
1436         Modifications           *mods = NULL, *modtail = NULL,
1437                                 *ml, *delmod, *addmod;
1438         Attribute               *pa, *ha, at;
1439         const char              *txt;
1440         pw_hist                 *tl = NULL, *p;
1441         int                     zapReset, send_ctrl = 0, free_txt = 0;
1442         Entry                   *e;
1443         struct berval           newpw = BER_BVNULL, oldpw = BER_BVNULL,
1444                                 *bv, cr[2];
1445         LDAPPasswordPolicyError pErr = PP_noError;
1446         LDAPControl             *ctrl = NULL;
1447         LDAPControl             **oldctrls = NULL;
1448         int                     is_pwdexop = 0;
1449
1450         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1451         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1452         op->o_bd->bd_info = (BackendInfo *)on;
1453
1454         if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
1455
1456         /* If this is a replica, we may need to tweak some of the
1457          * master's modifications. Otherwise, just pass it through.
1458          */
1459         if ( be_shadow_update( op )) {
1460                 Modifications **prev;
1461                 int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
1462                 Attribute *a_grace, *a_lock, *a_fail;
1463
1464                 a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
1465                 a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
1466                 a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
1467
1468                 for( prev = &op->orm_modlist, ml = *prev; ml; ml = *prev ) {
1469
1470                         if ( ml->sml_desc == slap_schema.si_ad_userPassword )
1471                                 got_pw = 1;
1472
1473                         /* If we're deleting an attr that didn't exist,
1474                          * drop this delete op
1475                          */
1476                         if ( ml->sml_op == LDAP_MOD_DELETE ) {
1477                                 int drop = 0;
1478
1479                                 if ( ml->sml_desc == ad_pwdGraceUseTime ) {
1480                                         got_del_grace = 1;
1481                                         if ( !a_grace )
1482                                                 drop = 1;
1483                                 } else
1484                                 if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
1485                                         got_del_lock = 1;
1486                                         if ( !a_lock )
1487                                                 drop = 1;
1488                                 } else
1489                                 if ( ml->sml_desc == ad_pwdFailureTime ) {
1490                                         got_del_fail = 1;
1491                                         if ( !a_fail )
1492                                                 drop = 1;
1493                                 }
1494                                 if ( drop ) {
1495                                         *prev = ml->sml_next;
1496                                         ml->sml_next = NULL;
1497                                         slap_mods_free( ml, 1 );
1498                                         continue;
1499                                 }
1500                         }
1501                         prev = &ml->sml_next;
1502                 }
1503
1504                 /* If we're resetting the password, make sure grace, accountlock,
1505                  * and failure also get removed.
1506                  */
1507                 if ( got_pw ) {
1508                         if ( a_grace && !got_del_grace ) {
1509                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1510                                 ml->sml_op = LDAP_MOD_DELETE;
1511                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1512                                 ml->sml_type.bv_val = NULL;
1513                                 ml->sml_desc = ad_pwdGraceUseTime;
1514                                 ml->sml_numvals = 0;
1515                                 ml->sml_values = NULL;
1516                                 ml->sml_nvalues = NULL;
1517                                 ml->sml_next = NULL;
1518                                 *prev = ml;
1519                                 prev = &ml->sml_next;
1520                         }
1521                         if ( a_lock && !got_del_lock ) {
1522                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1523                                 ml->sml_op = LDAP_MOD_DELETE;
1524                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1525                                 ml->sml_type.bv_val = NULL;
1526                                 ml->sml_desc = ad_pwdAccountLockedTime;
1527                                 ml->sml_numvals = 0;
1528                                 ml->sml_values = NULL;
1529                                 ml->sml_nvalues = NULL;
1530                                 ml->sml_next = NULL;
1531                                 *prev = ml;
1532                         }
1533                         if ( a_fail && !got_del_fail ) {
1534                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1535                                 ml->sml_op = LDAP_MOD_DELETE;
1536                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1537                                 ml->sml_type.bv_val = NULL;
1538                                 ml->sml_desc = ad_pwdFailureTime;
1539                                 ml->sml_numvals = 0;
1540                                 ml->sml_values = NULL;
1541                                 ml->sml_nvalues = NULL;
1542                                 ml->sml_next = NULL;
1543                                 *prev = ml;
1544                         }
1545                 }
1546                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1547                 be_entry_release_r( op, e );
1548                 return SLAP_CB_CONTINUE;
1549         }
1550
1551         /* Did we receive a password policy request control? */
1552         if ( op->o_ctrlflag[ppolicy_cid] ) {
1553                 send_ctrl = 1;
1554         }
1555
1556         /* See if this is a pwdModify exop. If so, we can
1557          * access the plaintext passwords from that request.
1558          */
1559         {
1560                 slap_callback *sc;
1561
1562                 for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
1563                         if ( sc->sc_response == slap_null_cb &&
1564                                 sc->sc_private ) {
1565                                 req_pwdexop_s *qpw = sc->sc_private;
1566                                 newpw = qpw->rs_new;
1567                                 oldpw = qpw->rs_old;
1568                                 is_pwdexop = 1;
1569                                 break;
1570                         }
1571                 }
1572         }
1573
1574         ppolicy_get( op, e, &pp );
1575
1576         for ( ml = op->orm_modlist,
1577                         pwmod = 0, mod_pw_only = 1,
1578                         deladd = 0, delmod = NULL,
1579                         addmod = NULL,
1580                         zapReset = 1;
1581                 ml != NULL; modtail = ml, ml = ml->sml_next )
1582         {
1583                 if ( ml->sml_desc == pp.ad ) {
1584                         pwmod = 1;
1585                         pwmop = ml->sml_op;
1586                         if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
1587                                 (ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
1588                         {
1589                                 deladd = 1;
1590                                 delmod = ml;
1591                         }
1592
1593                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1594                                 (ml->sml_op == LDAP_MOD_REPLACE))
1595                         {
1596                                 if ( ml->sml_values && !BER_BVISNULL( &ml->sml_values[0] )) {
1597                                         if ( deladd == 1 )
1598                                                 deladd = 2;
1599
1600                                         /* FIXME: there's no easy way to ensure
1601                                          * that add does not cause multiple
1602                                          * userPassword values; one way (that
1603                                          * would be consistent with the single
1604                                          * password constraint) would be to turn
1605                                          * add into replace); another would be
1606                                          * to disallow add.
1607                                          *
1608                                          * Let's check at least that a single value
1609                                          * is being added
1610                                          */
1611                                         if ( addmod || !BER_BVISNULL( &ml->sml_values[ 1 ] ) ) {
1612                                                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1613                                                 rs->sr_text = "Password policy only allows one password value";
1614                                                 goto return_results;
1615                                         }
1616
1617                                         addmod = ml;
1618                                 } else {
1619                                         /* replace can have no values, add cannot */
1620                                         assert( ml->sml_op == LDAP_MOD_REPLACE );
1621                                 }
1622                         }
1623
1624                 } else if ( !(ml->sml_flags & SLAP_MOD_INTERNAL) && !is_at_operational( ml->sml_desc->ad_type ) ) {
1625                         mod_pw_only = 0;
1626                         /* modifying something other than password */
1627                 }
1628
1629                 /*
1630                  * If there is a request to explicitly add a pwdReset
1631                  * attribute, then we suppress the normal behaviour on
1632                  * password change, which is to remove the pwdReset
1633                  * attribute.
1634                  *
1635                  * This enables an administrator to assign a new password
1636                  * and place a "must reset" flag on the entry, which will
1637                  * stay until the user explicitly changes his/her password.
1638                  */
1639                 if (ml->sml_desc == ad_pwdReset ) {
1640                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1641                                 (ml->sml_op == LDAP_MOD_REPLACE))
1642                                 zapReset = 0;
1643                 }
1644         }
1645
1646         if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
1647                 if ( dn_match( &op->o_conn->c_ndn,
1648                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1649                         Debug( LDAP_DEBUG_TRACE,
1650                                 "connection restricted to password changing only\n", 0, 0, 0 );
1651                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1652                         rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
1653                         pErr = PP_changeAfterReset;
1654                         goto return_results;
1655                 } else {
1656                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1657                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1658                 }
1659         }
1660
1661         /*
1662          * if we have a "safe password modify policy", then we need to check if we're doing
1663          * a delete (with the old password), followed by an add (with the new password).
1664          *
1665          * If we got just a delete with nothing else, just let it go. We also skip all the checks if
1666          * the root user is bound. Root can do anything, including avoid the policies.
1667          */
1668
1669         if (!pwmod) goto do_modify;
1670
1671         /*
1672          * Build the password history list in ascending time order
1673          * We need this, even if the user is root, in order to maintain
1674          * the pwdHistory operational attributes properly.
1675          */
1676         if (addmod && pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
1677                 struct berval oldpw;
1678                 time_t oldtime;
1679
1680                 for(i=0; ha->a_nvals[i].bv_val; i++) {
1681                         rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
1682                                 &oldtime, &oldpw );
1683
1684                         if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
1685
1686                         if (oldpw.bv_val) {
1687                                 add_to_pwd_history( &tl, oldtime, &oldpw,
1688                                         &(ha->a_nvals[i]) );
1689                                 oldpw.bv_val = NULL;
1690                                 oldpw.bv_len = 0;
1691                         }
1692                 }
1693                 for(p=tl; p; p=p->next, hsize++); /* count history size */
1694         }
1695
1696         if (be_isroot( op )) goto do_modify;
1697
1698         if (!pp.pwdAllowUserChange) {
1699                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1700                 rs->sr_text = "User alteration of password is not allowed";
1701                 pErr = PP_passwordModNotAllowed;
1702                 goto return_results;
1703         }
1704
1705         /* Just deleting? */
1706         if (!addmod) {
1707                 /* skip everything else */
1708                 pwmod = 0;
1709                 goto do_modify;
1710         }
1711
1712         /* This is a pwdModify exop that provided the old pw.
1713          * We need to create a Delete mod for this old pw and
1714          * let the matching value get found later
1715          */
1716         if (pp.pwdSafeModify && oldpw.bv_val ) {
1717                 ml = (Modifications *)ch_calloc( sizeof( Modifications ), 1 );
1718                 ml->sml_op = LDAP_MOD_DELETE;
1719                 ml->sml_flags = SLAP_MOD_INTERNAL;
1720                 ml->sml_desc = pp.ad;
1721                 ml->sml_type = pp.ad->ad_cname;
1722                 ml->sml_numvals = 1;
1723                 ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1724                 ber_dupbv( &ml->sml_values[0], &oldpw );
1725                 BER_BVZERO( &ml->sml_values[1] );
1726                 ml->sml_next = op->orm_modlist;
1727                 op->orm_modlist = ml;
1728                 delmod = ml;
1729                 deladd = 2;
1730         }
1731
1732         if (pp.pwdSafeModify && deladd != 2) {
1733                 Debug( LDAP_DEBUG_TRACE,
1734                         "change password must use DELETE followed by ADD/REPLACE\n",
1735                         0, 0, 0 );
1736                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1737                 rs->sr_text = "Must supply old password to be changed as well as new one";
1738                 pErr = PP_mustSupplyOldPassword;
1739                 goto return_results;
1740         }
1741
1742         /* Check age, but only if pwdReset is not TRUE */
1743         pa = attr_find( e->e_attrs, ad_pwdReset );
1744         if ((!pa || !bvmatch( &pa->a_nvals[0], &slap_true_bv )) &&
1745                 pp.pwdMinAge > 0) {
1746                 time_t pwtime = (time_t)-1, now;
1747                 int age;
1748
1749                 if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1750                         pwtime = parse_time( pa->a_nvals[0].bv_val );
1751                 now = slap_get_time();
1752                 age = (int)(now - pwtime);
1753                 if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
1754                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1755                         rs->sr_text = "Password is too young to change";
1756                         pErr = PP_passwordTooYoung;
1757                         goto return_results;
1758                 }
1759         }
1760
1761         /* pa is used in password history check below, be sure it's set */
1762         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
1763                 /*
1764                  * we have a password to check
1765                  */
1766                 bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
1767                 /* FIXME: no access checking? */
1768                 rc = slap_passwd_check( op, NULL, pa, bv, &txt );
1769                 if (rc != LDAP_SUCCESS) {
1770                         Debug( LDAP_DEBUG_TRACE,
1771                                 "old password check failed: %s\n", txt, 0, 0 );
1772
1773                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1774                         rs->sr_text = "Must supply correct old password to change to new one";
1775                         pErr = PP_mustSupplyOldPassword;
1776                         goto return_results;
1777
1778                 } else {
1779                         int i;
1780
1781                         /*
1782                          * replace the delete value with the (possibly hashed)
1783                          * value which is currently in the password.
1784                          */
1785                         for ( i = 0; !BER_BVISNULL( &delmod->sml_values[i] ); i++ ) {
1786                                 free( delmod->sml_values[i].bv_val );
1787                                 BER_BVZERO( &delmod->sml_values[i] );
1788                         }
1789                         free( delmod->sml_values );
1790                         delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
1791                         BER_BVZERO( &delmod->sml_values[1] );
1792                         ber_dupbv( &(delmod->sml_values[0]),  &(pa->a_nvals[0]) );
1793                 }
1794         }
1795
1796         bv = newpw.bv_val ? &newpw : &addmod->sml_values[0];
1797         if (pp.pwdCheckQuality > 0) {
1798
1799                 rc = check_password_quality( bv, &pp, &pErr, e, (char **)&txt );
1800                 if (rc != LDAP_SUCCESS) {
1801                         rs->sr_err = rc;
1802                         if ( txt ) {
1803                                 rs->sr_text = txt;
1804                                 free_txt = 1;
1805                         } else {
1806                                 rs->sr_text = "Password fails quality checking policy";
1807                         }
1808                         goto return_results;
1809                 }
1810         }
1811
1812         /* If pwdInHistory is zero, passwords may be reused */
1813         if (pa && pp.pwdInHistory > 0) {
1814                 /*
1815                  * Last check - the password history.
1816                  */
1817                 /* FIXME: no access checking? */
1818                 if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
1819                         /*
1820                          * This is bad - it means that the user is attempting
1821                          * to set the password to the same as the old one.
1822                          */
1823                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1824                         rs->sr_text = "Password is not being changed from existing value";
1825                         pErr = PP_passwordInHistory;
1826                         goto return_results;
1827                 }
1828
1829                 /*
1830                  * Iterate through the password history, and fail on any
1831                  * password matches.
1832                  */
1833                 at = *pa;
1834                 at.a_vals = cr;
1835                 cr[1].bv_val = NULL;
1836                 for(p=tl; p; p=p->next) {
1837                         cr[0] = p->pw;
1838                         /* FIXME: no access checking? */
1839                         rc = slap_passwd_check( op, NULL, &at, bv, &txt );
1840
1841                         if (rc != LDAP_SUCCESS) continue;
1842
1843                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1844                         rs->sr_text = "Password is in history of old passwords";
1845                         pErr = PP_passwordInHistory;
1846                         goto return_results;
1847                 }
1848         }
1849
1850 do_modify:
1851         if (pwmod) {
1852                 struct berval timestamp;
1853                 char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1854                 time_t now = slap_get_time();
1855
1856                 /* If the conn is restricted, set a callback to clear it
1857                  * if the pwmod succeeds
1858                  */
1859                 if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1860                         slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
1861                                 op->o_tmpmemctx );
1862                         sc->sc_next = op->o_callback;
1863                         /* Must use sc_response to insure we reset on success, before
1864                          * the client sees the response. Must use sc_cleanup to insure
1865                          * that it gets cleaned up if sc_response is not called.
1866                          */
1867                         sc->sc_response = ppolicy_mod_cb;
1868                         sc->sc_cleanup = ppolicy_mod_cb;
1869                         op->o_callback = sc;
1870                 }
1871
1872                 /*
1873                  * keep the necessary pwd.. operational attributes
1874                  * up to date.
1875                  */
1876
1877                 timestamp.bv_val = timebuf;
1878                 timestamp.bv_len = sizeof(timebuf);
1879                 slap_timestamp( &now, &timestamp );
1880
1881                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1882                 mods->sml_desc = ad_pwdChangedTime;
1883                 if (pwmop != LDAP_MOD_DELETE) {
1884                         mods->sml_op = LDAP_MOD_REPLACE;
1885                         mods->sml_numvals = 1;
1886                         mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1887                         ber_dupbv( &mods->sml_values[0], &timestamp );
1888                         BER_BVZERO( &mods->sml_values[1] );
1889                         assert( !BER_BVISNULL( &mods->sml_values[0] ) );
1890
1891                 } else {
1892                         mods->sml_op = LDAP_MOD_DELETE;
1893                 }
1894                 mods->sml_flags = SLAP_MOD_INTERNAL;
1895                 mods->sml_next = NULL;
1896                 modtail->sml_next = mods;
1897                 modtail = mods;
1898
1899                 if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
1900                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1901                         mods->sml_op = LDAP_MOD_DELETE;
1902                         mods->sml_desc = ad_pwdGraceUseTime;
1903                         mods->sml_flags = SLAP_MOD_INTERNAL;
1904                         mods->sml_next = NULL;
1905                         modtail->sml_next = mods;
1906                         modtail = mods;
1907                 }
1908
1909                 if (attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
1910                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1911                         mods->sml_op = LDAP_MOD_DELETE;
1912                         mods->sml_desc = ad_pwdAccountLockedTime;
1913                         mods->sml_flags = SLAP_MOD_INTERNAL;
1914                         mods->sml_next = NULL;
1915                         modtail->sml_next = mods;
1916                         modtail = mods;
1917                 }
1918
1919                 if (attr_find(e->e_attrs, ad_pwdFailureTime )) {
1920                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1921                         mods->sml_op = LDAP_MOD_DELETE;
1922                         mods->sml_desc = ad_pwdFailureTime;
1923                         mods->sml_flags = SLAP_MOD_INTERNAL;
1924                         mods->sml_next = NULL;
1925                         modtail->sml_next = mods;
1926                         modtail = mods;
1927                 }
1928
1929                 /* Delete the pwdReset attribute, since it's being reset */
1930                 if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
1931                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1932                         mods->sml_op = LDAP_MOD_DELETE;
1933                         mods->sml_desc = ad_pwdReset;
1934                         mods->sml_flags = SLAP_MOD_INTERNAL;
1935                         mods->sml_next = NULL;
1936                         modtail->sml_next = mods;
1937                         modtail = mods;
1938                 }
1939
1940                 if (pp.pwdInHistory > 0) {
1941                         if (hsize >= pp.pwdInHistory) {
1942                                 /*
1943                                  * We use the >= operator, since we are going to add
1944                                  * the existing password attribute value into the
1945                                  * history - thus the cardinality of history values is
1946                                  * about to rise by one.
1947                                  *
1948                                  * If this would push it over the limit of history
1949                                  * values (remembering - the password policy could have
1950                                  * changed since the password was last altered), we must
1951                                  * delete at least 1 value from the pwdHistory list.
1952                                  *
1953                                  * In fact, we delete '(#pwdHistory attrs - max pwd
1954                                  * history length) + 1' values, starting with the oldest.
1955                                  * This is easily evaluated, since the linked list is
1956                                  * created in ascending time order.
1957                                  */
1958                                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1959                                 mods->sml_op = LDAP_MOD_DELETE;
1960                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1961                                 mods->sml_desc = ad_pwdHistory;
1962                                 mods->sml_numvals = hsize - pp.pwdInHistory + 1;
1963                                 mods->sml_values = ch_calloc( sizeof( struct berval ),
1964                                         hsize - pp.pwdInHistory + 2 );
1965                                 BER_BVZERO( &mods->sml_values[ hsize - pp.pwdInHistory + 1 ] );
1966                                 for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
1967                                         BER_BVZERO( &mods->sml_values[i] );
1968                                         ber_dupbv( &(mods->sml_values[i]), &p->bv );
1969                                 }
1970                                 mods->sml_next = NULL;
1971                                 modtail->sml_next = mods;
1972                                 modtail = mods;
1973                         }
1974                         free_pwd_history_list( &tl );
1975
1976                         /*
1977                          * Now add the existing password into the history list.
1978                          * This will be executed even if the operation is to delete
1979                          * the password entirely.
1980                          *
1981                          * This isn't in the spec explicitly, but it seems to make
1982                          * sense that the password history list is the list of all
1983                          * previous passwords - even if they were deleted. Thus, if
1984                          * someone tries to add a historical password at some future
1985                          * point, it will fail.
1986                          */
1987                         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
1988                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1989                                 mods->sml_op = LDAP_MOD_ADD;
1990                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1991                                 mods->sml_type.bv_val = NULL;
1992                                 mods->sml_desc = ad_pwdHistory;
1993                                 mods->sml_nvalues = NULL;
1994                                 mods->sml_numvals = 1;
1995                                 mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
1996                                 mods->sml_values[ 1 ].bv_val = NULL;
1997                                 mods->sml_values[ 1 ].bv_len = 0;
1998                                 make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
1999                                 mods->sml_next = NULL;
2000                                 modtail->sml_next = mods;
2001                                 modtail = mods;
2002
2003                         } else {
2004                                 Debug( LDAP_DEBUG_TRACE,
2005                                 "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
2006                         }
2007                 }
2008
2009                 /*
2010                  * Controversial bit here. If the new password isn't hashed
2011                  * (ie, is cleartext), we probably should hash it according
2012                  * to the default hash. The reason for this is that we want
2013                  * to use the policy if possible, but if we hash the password
2014                  * before, then we're going to run into trouble when it
2015                  * comes time to check the password.
2016                  *
2017                  * Now, the right thing to do is to use the extended password
2018                  * modify operation, but not all software can do this,
2019                  * therefore it makes sense to hash the new password, now
2020                  * we know it passes the policy requirements.
2021                  *
2022                  * Of course, if the password is already hashed, then we
2023                  * leave it alone.
2024                  */
2025
2026                 if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
2027                         (password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS))
2028                 {
2029                         struct berval hpw, bv;
2030
2031                         slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
2032                         if (hpw.bv_val == NULL) {
2033                                         /*
2034                                          * hashing didn't work. Emit an error.
2035                                          */
2036                                 rs->sr_err = LDAP_OTHER;
2037                                 rs->sr_text = txt;
2038                                 goto return_results;
2039                         }
2040                         bv = addmod->sml_values[0];
2041                                 /* clear and discard the clear password */
2042                         memset(bv.bv_val, 0, bv.bv_len);
2043                         ber_memfree(bv.bv_val);
2044                         addmod->sml_values[0] = hpw;
2045                 }
2046         }
2047         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2048         be_entry_release_r( op, e );
2049         return SLAP_CB_CONTINUE;
2050
2051 return_results:
2052         free_pwd_history_list( &tl );
2053         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2054         be_entry_release_r( op, e );
2055         if ( send_ctrl ) {
2056                 ctrl = create_passcontrol( op, -1, -1, pErr );
2057                 oldctrls = add_passcontrol( op, rs, ctrl );
2058         }
2059         send_ldap_result( op, rs );
2060         if ( free_txt ) {
2061                 free( (char *)txt );
2062                 rs->sr_text = NULL;
2063         }
2064         if ( send_ctrl ) {
2065                 if ( is_pwdexop ) {
2066                         if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
2067                                 op->o_tmpfree( oldctrls, op->o_tmpmemctx );
2068                         }
2069                         oldctrls = NULL;
2070                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
2071
2072                 } else {
2073                         ctrls_cleanup( op, rs, oldctrls );
2074                 }
2075         }
2076         return rs->sr_err;
2077 }
2078
2079 static int
2080 ppolicy_parseCtrl(
2081         Operation *op,
2082         SlapReply *rs,
2083         LDAPControl *ctrl )
2084 {
2085         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
2086                 rs->sr_text = "passwordPolicyRequest control value not absent";
2087                 return LDAP_PROTOCOL_ERROR;
2088         }
2089         op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
2090                 ? SLAP_CONTROL_CRITICAL
2091                 : SLAP_CONTROL_NONCRITICAL;
2092
2093         return LDAP_SUCCESS;
2094 }
2095
2096 static int
2097 attrPretty(
2098         Syntax *syntax,
2099         struct berval *val,
2100         struct berval *out,
2101         void *ctx )
2102 {
2103         AttributeDescription *ad = NULL;
2104         const char *err;
2105         int code;
2106
2107         code = slap_bv2ad( val, &ad, &err );
2108         if ( !code ) {
2109                 ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
2110         }
2111         return code;
2112 }
2113
2114 static int
2115 attrNormalize(
2116         slap_mask_t use,
2117         Syntax *syntax,
2118         MatchingRule *mr,
2119         struct berval *val,
2120         struct berval *out,
2121         void *ctx )
2122 {
2123         AttributeDescription *ad = NULL;
2124         const char *err;
2125         int code;
2126
2127         code = slap_bv2ad( val, &ad, &err );
2128         if ( !code ) {
2129                 ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
2130         }
2131         return code;
2132 }
2133
2134 static int
2135 ppolicy_db_init(
2136         BackendDB *be,
2137         ConfigReply *cr
2138 )
2139 {
2140         slap_overinst *on = (slap_overinst *) be->bd_info;
2141
2142         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
2143                 /* do not allow slapo-ppolicy to be global by now (ITS#5858) */
2144                 if ( cr ){
2145                         snprintf( cr->msg, sizeof(cr->msg),
2146                                 "slapo-ppolicy cannot be global" );
2147                         fprintf( stderr, "%s\n", cr->msg );
2148                 }
2149                 return 1;
2150         }
2151
2152         /* Has User Schema been initialized yet? */
2153         if ( !pwd_UsSchema[0].ad[0] ) {
2154                 const char *err;
2155                 int i, code;
2156
2157                 for (i=0; pwd_UsSchema[i].def; i++) {
2158                         code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
2159                         if ( code ) {
2160                                 if ( cr ){
2161                                         snprintf( cr->msg, sizeof(cr->msg),
2162                                                 "User Schema load failed for attribute \"%s\". Error code %d: %s",
2163                                                 pwd_UsSchema[i].def, code, err );
2164                                         fprintf( stderr, "%s\n", cr->msg );
2165                                 }
2166                                 return code;
2167                         }
2168                 }
2169                 {
2170                         Syntax *syn;
2171                         MatchingRule *mr;
2172
2173                         syn = ch_malloc( sizeof( Syntax ));
2174                         *syn = *ad_pwdAttribute->ad_type->sat_syntax;
2175                         syn->ssyn_pretty = attrPretty;
2176                         ad_pwdAttribute->ad_type->sat_syntax = syn;
2177
2178                         mr = ch_malloc( sizeof( MatchingRule ));
2179                         *mr = *ad_pwdAttribute->ad_type->sat_equality;
2180                         mr->smr_normalize = attrNormalize;
2181                         ad_pwdAttribute->ad_type->sat_equality = mr;
2182                 }
2183         }
2184
2185         on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
2186
2187         if ( dtblsize && !pwcons ) {
2188                 /* accommodate for c_conn_idx == -1 */
2189                 pwcons = ch_calloc( sizeof(pw_conn), dtblsize + 1 );
2190                 pwcons++;
2191         }
2192
2193         return 0;
2194 }
2195
2196 static int
2197 ppolicy_db_open(
2198         BackendDB *be,
2199         ConfigReply *cr
2200 )
2201 {
2202         ov_count++;
2203         return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2204 }
2205
2206 static int
2207 ppolicy_close(
2208         BackendDB *be,
2209         ConfigReply *cr
2210 )
2211 {
2212         slap_overinst *on = (slap_overinst *) be->bd_info;
2213         pp_info *pi = on->on_bi.bi_private;
2214
2215         /* Perhaps backover should provide bi_destroy hooks... */
2216         ov_count--;
2217         if ( ov_count <=0 && pwcons ) {
2218                 pwcons--;
2219                 free( pwcons );
2220                 pwcons = NULL;
2221         }
2222         free( pi->def_policy.bv_val );
2223         free( pi );
2224
2225         return 0;
2226 }
2227
2228 static char *extops[] = {
2229         LDAP_EXOP_MODIFY_PASSWD,
2230         NULL
2231 };
2232
2233 static slap_overinst ppolicy;
2234
2235 int ppolicy_initialize()
2236 {
2237         int i, code;
2238
2239         for (i=0; pwd_OpSchema[i].def; i++) {
2240                 code = register_at( pwd_OpSchema[i].def, pwd_OpSchema[i].ad, 0 );
2241                 if ( code ) {
2242                         Debug( LDAP_DEBUG_ANY,
2243                                 "ppolicy_initialize: register_at failed\n", 0, 0, 0 );
2244                         return code;
2245                 }
2246                 /* Allow Manager to set these as needed */
2247                 if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
2248                         (*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
2249                                 SLAP_AT_MANAGEABLE;
2250                 }
2251         }
2252
2253         code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
2254                 SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
2255                 ppolicy_parseCtrl, &ppolicy_cid );
2256         if ( code != LDAP_SUCCESS ) {
2257                 fprintf( stderr, "Failed to register control %d\n", code );
2258                 return code;
2259         }
2260
2261         ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
2262
2263         ppolicy.on_bi.bi_type = "ppolicy";
2264         ppolicy.on_bi.bi_db_init = ppolicy_db_init;
2265         ppolicy.on_bi.bi_db_open = ppolicy_db_open;
2266         ppolicy.on_bi.bi_db_close = ppolicy_close;
2267
2268         ppolicy.on_bi.bi_op_add = ppolicy_add;
2269         ppolicy.on_bi.bi_op_bind = ppolicy_bind;
2270         ppolicy.on_bi.bi_op_compare = ppolicy_restrict;
2271         ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
2272         ppolicy.on_bi.bi_op_modify = ppolicy_modify;
2273         ppolicy.on_bi.bi_op_search = ppolicy_restrict;
2274         ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
2275
2276         ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
2277         code = config_register_schema( ppolicycfg, ppolicyocs );
2278         if ( code ) return code;
2279
2280         return overlay_register( &ppolicy );
2281 }
2282
2283 #if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
2284 int init_module(int argc, char *argv[]) {
2285         return ppolicy_initialize();
2286 }
2287 #endif
2288
2289 #endif  /* defined(SLAPD_OVER_PPOLICY) */