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 2004-2010 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         int set_restrict;
 857         LDAPControl **oldctrls;
 858         Modifications *mod;
 859         LDAPPasswordPolicyError pErr;
 860         PassPolicy pp;
 861 } ppbind;
 862
 863 static void
 864 ctrls_cleanup( Operation *op, SlapReply *rs, LDAPControl **oldctrls )
 865 {
 866         int n;
 867
 868         assert( rs->sr_ctrls != NULL );
 869         assert( rs->sr_ctrls[0] != NULL );
 870
 871         for ( n = 0; rs->sr_ctrls[n]; n++ ) {
 872                 if ( rs->sr_ctrls[n]->ldctl_oid == ppolicy_ctrl_oid ) {
 873                         op->o_tmpfree( rs->sr_ctrls[n], op->o_tmpmemctx );
 874                         rs->sr_ctrls[n] = (LDAPControl *)(-1);
 875                         break;
 876                 }
 877         }
 878
 879         if ( rs->sr_ctrls[n] == NULL ) {
 880                 /* missed? */
 881         }
 882
 883         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 884
 885         rs->sr_ctrls = oldctrls;
 886 }
 887
 888 static int
 889 ppolicy_ctrls_cleanup( Operation *op, SlapReply *rs )
 890 {
 891         ppbind *ppb = op->o_callback->sc_private;
 892         if ( ppb->send_ctrl ) {
 893                 ctrls_cleanup( op, rs, ppb->oldctrls );
 894         }
 895         return SLAP_CB_CONTINUE;
 896 }
 897
 898 static int
 899 ppolicy_bind_response( Operation *op, SlapReply *rs )
 900 {
 901         ppbind *ppb = op->o_callback->sc_private;
 902         slap_overinst *on = ppb->on;
 903         Modifications *mod = ppb->mod, *m;
 904         int pwExpired = 0;
 905         int ngut = -1, warn = -1, age, rc;
 906         Attribute *a;
 907         time_t now, pwtime = (time_t)-1;
 908         char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 909         struct berval timestamp;
 910         BackendInfo *bi = op->o_bd->bd_info;
 911         Entry *e;
 912
 913         /* If we already know it's locked, just get on with it */
 914         if ( ppb->pErr != PP_noError ) {
 915                 goto locked;
 916         }
 917
 918         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 919         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 920         op->o_bd->bd_info = bi;
 921
 922         if ( rc != LDAP_SUCCESS ) {
 923                 return SLAP_CB_CONTINUE;
 924         }
 925
 926         now = slap_get_time(); /* stored for later consideration */
 927         timestamp.bv_val = nowstr;
 928         timestamp.bv_len = sizeof(nowstr);
 929         slap_timestamp( &now, &timestamp );
 930
 931         if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
 932                 int i = 0, fc = 0;
 933
 934                 m = ch_calloc( sizeof(Modifications), 1 );
 935                 m->sml_op = LDAP_MOD_ADD;
 936                 m->sml_flags = 0;
 937                 m->sml_type = ad_pwdFailureTime->ad_cname;
 938                 m->sml_desc = ad_pwdFailureTime;
 939                 m->sml_numvals = 1;
 940                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 941                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 942
 943                 ber_dupbv( &m->sml_values[0], &timestamp );
 944                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 945                 m->sml_next = mod;
 946                 mod = m;
 947
 948                 /*
 949                  * Count the pwdFailureTimes - if it's
 950                  * greater than the policy pwdMaxFailure,
 951                  * then lock the account.
 952                  */
 953                 if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
 954                         for(i=0; a->a_nvals[i].bv_val; i++) {
 955
 956                                 /*
 957                                  * If the interval is 0, then failures
 958                                  * stay on the record until explicitly
 959                                  * reset by successful authentication.
 960                                  */
 961                                 if (ppb->pp.pwdFailureCountInterval == 0) {
 962                                         fc++;
 963                                 } else if (now <=
 964                                                         parse_time(a->a_nvals[i].bv_val) +
 965                                                         ppb->pp.pwdFailureCountInterval) {
 966
 967                                         fc++;
 968                                 }
 969                                 /*
 970                                  * We only count those failures
 971                                  * which are not due to expire.
 972                                  */
 973                         }
 974                 }
 975
 976                 if ((ppb->pp.pwdMaxFailure > 0) &&
 977                         (fc >= ppb->pp.pwdMaxFailure - 1)) {
 978
 979                         /*
 980                          * We subtract 1 from the failure max
 981                          * because the new failure entry hasn't
 982                          * made it to the entry yet.
 983                          */
 984                         m = ch_calloc( sizeof(Modifications), 1 );
 985                         m->sml_op = LDAP_MOD_REPLACE;
 986                         m->sml_flags = 0;
 987                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 988                         m->sml_desc = ad_pwdAccountLockedTime;
 989                         m->sml_numvals = 1;
 990                         m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 991                         m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 992                         ber_dupbv( &m->sml_values[0], &timestamp );
 993                         ber_dupbv( &m->sml_nvalues[0], &timestamp );
 994                         m->sml_next = mod;
 995                         mod = m;
 996                 }
 997         } else if ( rs->sr_err == LDAP_SUCCESS ) {
 998                 if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
 999                         pwtime = parse_time( a->a_nvals[0].bv_val );
1000
1001                 /* delete all pwdFailureTimes */
1002                 if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
1003                         m = ch_calloc( sizeof(Modifications), 1 );
1004                         m->sml_op = LDAP_MOD_DELETE;
1005                         m->sml_flags = 0;
1006                         m->sml_type = ad_pwdFailureTime->ad_cname;
1007                         m->sml_desc = ad_pwdFailureTime;
1008                         m->sml_next = mod;
1009                         mod = m;
1010                 }
1011
1012                 /*
1013                  * check to see if the password must be changed
1014                  */
1015                 if ( ppb->pp.pwdMustChange &&
1016                         (a = attr_find( e->e_attrs, ad_pwdReset )) &&
1017                         bvmatch( &a->a_nvals[0], &slap_true_bv ) )
1018                 {
1019                         /*
1020                          * need to inject client controls here to give
1021                          * more information. For the moment, we ensure
1022                          * that we are disallowed from doing anything
1023                          * other than change password.
1024                          */
1025                         if ( ppb->set_restrict ) {
1026                                 ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
1027                                         &op->o_conn->c_ndn );
1028                         }
1029
1030                         ppb->pErr = PP_changeAfterReset;
1031
1032                 } else {
1033                         /*
1034                          * the password does not need to be changed, so
1035                          * we now check whether the password has expired.
1036                          *
1037                          * We can skip this bit if passwords don't age in
1038                          * the policy. Also, if there was no pwdChangedTime
1039                          * attribute in the entry, the password never expires.
1040                          */
1041                         if (ppb->pp.pwdMaxAge == 0) goto grace;
1042
1043                         if (pwtime != (time_t)-1) {
1044                                 /*
1045                                  * Check: was the last change time of
1046                                  * the password older than the maximum age
1047                                  * allowed. (Ignore case 2 from I-D, it's just silly.)
1048                                  */
1049                                 if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
1050                         }
1051                 }
1052
1053 grace:
1054                 if (!pwExpired) goto check_expiring_password;
1055
1056                 if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
1057                         ngut = ppb->pp.pwdGraceAuthNLimit;
1058                 else {
1059                         for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
1060                         ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
1061                 }
1062
1063                 /*
1064                  * ngut is the number of remaining grace logins
1065                  */
1066                 Debug( LDAP_DEBUG_ANY,
1067                         "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
1068                         e->e_name.bv_val, ngut, 0);
1069
1070                 if (ngut < 1) {
1071                         ppb->pErr = PP_passwordExpired;
1072                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
1073                         goto done;
1074                 }
1075
1076                 /*
1077                  * Add a grace user time to the entry
1078                  */
1079                 m = ch_calloc( sizeof(Modifications), 1 );
1080                 m->sml_op = LDAP_MOD_ADD;
1081                 m->sml_flags = 0;
1082                 m->sml_type = ad_pwdGraceUseTime->ad_cname;
1083                 m->sml_desc = ad_pwdGraceUseTime;
1084                 m->sml_numvals = 1;
1085                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
1086                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
1087                 ber_dupbv( &m->sml_values[0], &timestamp );
1088                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
1089                 m->sml_next = mod;
1090                 mod = m;
1091
1092 check_expiring_password:
1093                 /*
1094                  * Now we need to check to see
1095                  * if it is about to expire, and if so, should the user
1096                  * be warned about it in the password policy control.
1097                  *
1098                  * If the password has expired, and we're in the grace period, then
1099                  * we don't need to do this bit. Similarly, if we don't have password
1100                  * aging, then there's no need to do this bit either.
1101                  */
1102                 if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
1103                         goto done;
1104
1105                 age = (int)(now - pwtime);
1106
1107                 /*
1108                  * We know that there is a password Change Time attribute - if
1109                  * there wasn't, then the pwdExpired value would be true, unless
1110                  * there is no password aging - and if there is no password aging,
1111                  * then this section isn't called anyway - you can't have an
1112                  * expiring password if there's no limit to expire.
1113                  */
1114                 if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
1115                         /*
1116                          * Set the warning value.
1117                          */
1118                         warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
1119                         if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
1120
1121                         Debug( LDAP_DEBUG_ANY,
1122                                 "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
1123                                 op->o_req_dn.bv_val, warn, 0 );
1124                 }
1125         }
1126
1127 done:
1128         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1129         be_entry_release_r( op, e );
1130
1131 locked:
1132         if ( mod ) {
1133                 Operation op2 = *op;
1134                 SlapReply r2 = { REP_RESULT };
1135                 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
1136                 pp_info *pi = on->on_bi.bi_private;
1137                 LDAPControl c, *ca[2];
1138
1139                 op2.o_tag = LDAP_REQ_MODIFY;
1140                 op2.o_callback = &cb;
1141                 op2.orm_modlist = mod;
1142                 op2.orm_no_opattrs = 0;
1143                 op2.o_dn = op->o_bd->be_rootdn;
1144                 op2.o_ndn = op->o_bd->be_rootndn;
1145
1146                 /* If this server is a shadow and forward_updates is true,
1147                  * use the frontend to perform this modify. That will trigger
1148                  * the update referral, which can then be forwarded by the
1149                  * chain overlay. Obviously the updateref and chain overlay
1150                  * must be configured appropriately for this to be useful.
1151                  */
1152                 if ( SLAP_SHADOW( op->o_bd ) && pi->forward_updates ) {
1153                         op2.o_bd = frontendDB;
1154
1155                         /* Must use Relax control since these are no-user-mod */
1156                         op2.o_relax = SLAP_CONTROL_CRITICAL;
1157                         op2.o_ctrls = ca;
1158                         ca[0] = &c;
1159                         ca[1] = NULL;
1160                         BER_BVZERO( &c.ldctl_value );
1161                         c.ldctl_iscritical = 1;
1162                         c.ldctl_oid = LDAP_CONTROL_RELAX;
1163                 } else {
1164                         /* If not forwarding, don't update opattrs */
1165                         if ( SLAP_SINGLE_SHADOW( op->o_bd ))
1166                                 op2.orm_no_opattrs = 1;
1167                         op2.o_bd->bd_info = (BackendInfo *)on->on_info;
1168                 }
1169                 rc = op2.o_bd->be_modify( &op2, &r2 );
1170                 slap_mods_free( mod, 1 );
1171         }
1172
1173         if ( ppb->send_ctrl ) {
1174                 LDAPControl *ctrl = NULL;
1175                 pp_info *pi = on->on_bi.bi_private;
1176
1177                 /* Do we really want to tell that the account is locked? */
1178                 if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
1179                         ppb->pErr = PP_noError;
1180                 }
1181                 ctrl = create_passcontrol( op, warn, ngut, ppb->pErr );
1182                 ppb->oldctrls = add_passcontrol( op, rs, ctrl );
1183                 op->o_callback->sc_cleanup = ppolicy_ctrls_cleanup;
1184         }
1185         op->o_bd->bd_info = bi;
1186         return SLAP_CB_CONTINUE;
1187 }
1188
1189 static int
1190 ppolicy_bind( Operation *op, SlapReply *rs )
1191 {
1192         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1193
1194         /* Reset lockout status on all Bind requests */
1195         if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1196                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1197                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1198         }
1199
1200         /* Root bypasses policy */
1201         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
1202                 Entry *e;
1203                 int rc;
1204                 ppbind *ppb;
1205                 slap_callback *cb;
1206
1207                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1208                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1209
1210                 if ( rc != LDAP_SUCCESS ) {
1211                         return SLAP_CB_CONTINUE;
1212                 }
1213
1214                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1215                         1, op->o_tmpmemctx );
1216                 ppb = (ppbind *)(cb+1);
1217                 ppb->on = on;
1218                 ppb->pErr = PP_noError;
1219                 ppb->set_restrict = 1;
1220
1221                 /* Setup a callback so we can munge the result */
1222
1223                 cb->sc_response = ppolicy_bind_response;
1224                 cb->sc_next = op->o_callback->sc_next;
1225                 cb->sc_private = ppb;
1226                 op->o_callback->sc_next = cb;
1227
1228                 /* Did we receive a password policy request control? */
1229                 if ( op->o_ctrlflag[ppolicy_cid] ) {
1230                         ppb->send_ctrl = 1;
1231                 }
1232
1233                 op->o_bd->bd_info = (BackendInfo *)on;
1234                 ppolicy_get( op, e, &ppb->pp );
1235
1236                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1237
1238                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1239                 be_entry_release_r( op, e );
1240
1241                 if ( rc ) {
1242                         ppb->pErr = PP_accountLocked;
1243                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
1244                         return rs->sr_err;
1245                 }
1246
1247         }
1248
1249         return SLAP_CB_CONTINUE;
1250 }
1251
1252 /* Reset the restricted info for the next session on this connection */
1253 static int
1254 ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
1255 {
1256         if ( !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
1257                 ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
1258                 BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
1259         }
1260         return SLAP_CB_CONTINUE;
1261 }
1262
1263 /* Check if this connection is restricted */
1264 static int
1265 ppolicy_restrict(
1266         Operation *op,
1267         SlapReply *rs )
1268 {
1269         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1270         int send_ctrl = 0;
1271
1272         /* Did we receive a password policy request control? */
1273         if ( op->o_ctrlflag[ppolicy_cid] ) {
1274                 send_ctrl = 1;
1275         }
1276
1277         if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1278                 LDAPControl **oldctrls;
1279                 /* if the current authcDN doesn't match the one we recorded,
1280                  * then an intervening Bind has succeeded and the restriction
1281                  * no longer applies. (ITS#4516)
1282                  */
1283                 if ( !dn_match( &op->o_conn->c_ndn,
1284                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1285                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1286                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1287                         return SLAP_CB_CONTINUE;
1288                 }
1289
1290                 Debug( LDAP_DEBUG_TRACE,
1291                         "connection restricted to password changing only\n", 0, 0, 0);
1292                 if ( send_ctrl ) {
1293                         LDAPControl *ctrl = NULL;
1294                         ctrl = create_passcontrol( op, -1, -1, PP_changeAfterReset );
1295                         oldctrls = add_passcontrol( op, rs, ctrl );
1296                 }
1297                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1298                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
1299                         "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
1300                 if ( send_ctrl ) {
1301                         ctrls_cleanup( op, rs, oldctrls );
1302                 }
1303                 return rs->sr_err;
1304         }
1305
1306         return SLAP_CB_CONTINUE;
1307 }
1308
1309 static int
1310 ppolicy_compare_response(
1311         Operation *op,
1312         SlapReply *rs )
1313 {
1314         /* map compare responses to bind responses */
1315         if ( rs->sr_err == LDAP_COMPARE_TRUE )
1316                 rs->sr_err = LDAP_SUCCESS;
1317         else if ( rs->sr_err == LDAP_COMPARE_FALSE )
1318                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
1319
1320         ppolicy_bind_response( op, rs );
1321
1322         /* map back to compare */
1323         if ( rs->sr_err == LDAP_SUCCESS )
1324                 rs->sr_err = LDAP_COMPARE_TRUE;
1325         else if ( rs->sr_err == LDAP_INVALID_CREDENTIALS )
1326                 rs->sr_err = LDAP_COMPARE_FALSE;
1327
1328         return SLAP_CB_CONTINUE;
1329 }
1330
1331 static int
1332 ppolicy_compare(
1333         Operation *op,
1334         SlapReply *rs )
1335 {
1336         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1337
1338         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1339                 return rs->sr_err;
1340
1341         /* Did we receive a password policy request control?
1342          * Are we testing the userPassword?
1343          */
1344         if ( op->o_ctrlflag[ppolicy_cid] &&
1345                 op->orc_ava->aa_desc == slap_schema.si_ad_userPassword ) {
1346                 Entry *e;
1347                 int rc;
1348                 ppbind *ppb;
1349                 slap_callback *cb;
1350
1351                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1352                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1353
1354                 if ( rc != LDAP_SUCCESS ) {
1355                         return SLAP_CB_CONTINUE;
1356                 }
1357
1358                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1359                         1, op->o_tmpmemctx );
1360                 ppb = (ppbind *)(cb+1);
1361                 ppb->on = on;
1362                 ppb->pErr = PP_noError;
1363                 ppb->send_ctrl = 1;
1364                 /* failures here don't lockout the connection */
1365                 ppb->set_restrict = 0;
1366
1367                 /* Setup a callback so we can munge the result */
1368
1369                 cb->sc_response = ppolicy_compare_response;
1370                 cb->sc_next = op->o_callback->sc_next;
1371                 cb->sc_private = ppb;
1372                 op->o_callback->sc_next = cb;
1373
1374                 op->o_bd->bd_info = (BackendInfo *)on;
1375                 ppolicy_get( op, e, &ppb->pp );
1376
1377                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1378
1379                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1380                 be_entry_release_r( op, e );
1381
1382                 if ( rc ) {
1383                         ppb->pErr = PP_accountLocked;
1384                         send_ldap_error( op, rs, LDAP_COMPARE_FALSE, NULL );
1385                         return rs->sr_err;
1386                 }
1387         }
1388         return SLAP_CB_CONTINUE;
1389 }
1390
1391 static int
1392 ppolicy_add(
1393         Operation *op,
1394         SlapReply *rs )
1395 {
1396         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1397         pp_info *pi = on->on_bi.bi_private;
1398         PassPolicy pp;
1399         Attribute *pa;
1400         const char *txt;
1401
1402         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1403                 return rs->sr_err;
1404
1405         /* If this is a replica, assume the master checked everything */
1406         if ( be_shadow_update( op ))
1407                 return SLAP_CB_CONTINUE;
1408
1409         /* Check for password in entry */
1410         if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
1411                 slap_schema.si_ad_userPassword )))
1412         {
1413                 assert( pa->a_vals != NULL );
1414                 assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
1415
1416                 if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
1417                         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
1418                         return rs->sr_err;
1419                 }
1420
1421                 /*
1422                  * new entry contains a password - if we're not the root user
1423                  * then we need to check that the password fits in with the
1424                  * security policy for the new entry.
1425                  */
1426                 ppolicy_get( op, op->ora_e, &pp );
1427                 if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
1428                         struct berval *bv = &(pa->a_vals[0]);
1429                         int rc, send_ctrl = 0;
1430                         LDAPPasswordPolicyError pErr = PP_noError;
1431                         char *txt;
1432
1433                         /* Did we receive a password policy request control? */
1434                         if ( op->o_ctrlflag[ppolicy_cid] ) {
1435                                 send_ctrl = 1;
1436                         }
1437                         rc = check_password_quality( bv, &pp, &pErr, op->ora_e, &txt );
1438                         if (rc != LDAP_SUCCESS) {
1439                                 LDAPControl **oldctrls = NULL;
1440                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1441                                 if ( send_ctrl ) {
1442                                         LDAPControl *ctrl = NULL;
1443                                         ctrl = create_passcontrol( op, -1, -1, pErr );
1444                                         oldctrls = add_passcontrol( op, rs, ctrl );
1445                                 }
1446                                 send_ldap_error( op, rs, rc, txt ? txt : "Password fails quality checking policy" );
1447                                 if ( txt ) {
1448                                         free( txt );
1449                                 }
1450                                 if ( send_ctrl ) {
1451                                         ctrls_cleanup( op, rs, oldctrls );
1452                                 }
1453                                 return rs->sr_err;
1454                         }
1455                 }
1456                         /*
1457                          * A controversial bit. We hash cleartext
1458                          * passwords provided via add and modify operations
1459                          * You're not really supposed to do this, since
1460                          * the X.500 model says "store attributes" as they
1461                          * get provided. By default, this is what we do
1462                          *
1463                          * But if the hash_passwords flag is set, we hash
1464                          * any cleartext password attribute values via the
1465                          * default password hashing scheme.
1466                          */
1467                 if ((pi->hash_passwords) &&
1468                         (password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
1469                         struct berval hpw;
1470
1471                         slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
1472                         if (hpw.bv_val == NULL) {
1473                                 /*
1474                                  * hashing didn't work. Emit an error.
1475                                  */
1476                                 rs->sr_err = LDAP_OTHER;
1477                                 rs->sr_text = txt;
1478                                 send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
1479                                 return rs->sr_err;
1480                         }
1481
1482                         memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
1483                         ber_memfree( pa->a_vals[0].bv_val );
1484                         pa->a_vals[0].bv_val = hpw.bv_val;
1485                         pa->a_vals[0].bv_len = hpw.bv_len;
1486                 }
1487
1488                 /* If password aging is in effect, set the pwdChangedTime */
1489                 if ( pp.pwdMaxAge || pp.pwdMinAge ) {
1490                         struct berval timestamp;
1491                         char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1492                         time_t now = slap_get_time();
1493
1494                         timestamp.bv_val = timebuf;
1495                         timestamp.bv_len = sizeof(timebuf);
1496                         slap_timestamp( &now, &timestamp );
1497
1498                         attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
1499                 }
1500         }
1501         return SLAP_CB_CONTINUE;
1502 }
1503
1504 static int
1505 ppolicy_mod_cb( Operation *op, SlapReply *rs )
1506 {
1507         slap_callback *sc = op->o_callback;
1508         op->o_callback = sc->sc_next;
1509         if ( rs->sr_err == LDAP_SUCCESS ) {
1510                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1511                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1512         }
1513         op->o_tmpfree( sc, op->o_tmpmemctx );
1514         return SLAP_CB_CONTINUE;
1515 }
1516
1517 static int
1518 ppolicy_modify( Operation *op, SlapReply *rs )
1519 {
1520         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1521         pp_info                 *pi = on->on_bi.bi_private;
1522         int                     i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
1523                                 hsize = 0;
1524         PassPolicy              pp;
1525         Modifications           *mods = NULL, *modtail = NULL,
1526                                 *ml, *delmod, *addmod;
1527         Attribute               *pa, *ha, at;
1528         const char              *txt;
1529         pw_hist                 *tl = NULL, *p;
1530         int                     zapReset, send_ctrl = 0, free_txt = 0;
1531         Entry                   *e;
1532         struct berval           newpw = BER_BVNULL, oldpw = BER_BVNULL,
1533                                 *bv, cr[2];
1534         LDAPPasswordPolicyError pErr = PP_noError;
1535         LDAPControl             *ctrl = NULL;
1536         LDAPControl             **oldctrls = NULL;
1537         int                     is_pwdexop = 0;
1538
1539         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1540         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1541         op->o_bd->bd_info = (BackendInfo *)on;
1542
1543         if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
1544
1545         /* If this is a replica, we may need to tweak some of the
1546          * master's modifications. Otherwise, just pass it through.
1547          */
1548         if ( be_shadow_update( op )) {
1549                 Modifications **prev;
1550                 int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
1551                 Attribute *a_grace, *a_lock, *a_fail;
1552
1553                 a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
1554                 a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
1555                 a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
1556
1557                 for( prev = &op->orm_modlist, ml = *prev; ml; ml = *prev ) {
1558
1559                         if ( ml->sml_desc == slap_schema.si_ad_userPassword )
1560                                 got_pw = 1;
1561
1562                         /* If we're deleting an attr that didn't exist,
1563                          * drop this delete op
1564                          */
1565                         if ( ml->sml_op == LDAP_MOD_DELETE ) {
1566                                 int drop = 0;
1567
1568                                 if ( ml->sml_desc == ad_pwdGraceUseTime ) {
1569                                         got_del_grace = 1;
1570                                         if ( !a_grace )
1571                                                 drop = 1;
1572                                 } else
1573                                 if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
1574                                         got_del_lock = 1;
1575                                         if ( !a_lock )
1576                                                 drop = 1;
1577                                 } else
1578                                 if ( ml->sml_desc == ad_pwdFailureTime ) {
1579                                         got_del_fail = 1;
1580                                         if ( !a_fail )
1581                                                 drop = 1;
1582                                 }
1583                                 if ( drop ) {
1584                                         *prev = ml->sml_next;
1585                                         ml->sml_next = NULL;
1586                                         slap_mods_free( ml, 1 );
1587                                         continue;
1588                                 }
1589                         }
1590                         prev = &ml->sml_next;
1591                 }
1592
1593                 /* If we're resetting the password, make sure grace, accountlock,
1594                  * and failure also get removed.
1595                  */
1596                 if ( got_pw ) {
1597                         if ( a_grace && !got_del_grace ) {
1598                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1599                                 ml->sml_op = LDAP_MOD_DELETE;
1600                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1601                                 ml->sml_type.bv_val = NULL;
1602                                 ml->sml_desc = ad_pwdGraceUseTime;
1603                                 ml->sml_numvals = 0;
1604                                 ml->sml_values = NULL;
1605                                 ml->sml_nvalues = NULL;
1606                                 ml->sml_next = NULL;
1607                                 *prev = ml;
1608                                 prev = &ml->sml_next;
1609                         }
1610                         if ( a_lock && !got_del_lock ) {
1611                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1612                                 ml->sml_op = LDAP_MOD_DELETE;
1613                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1614                                 ml->sml_type.bv_val = NULL;
1615                                 ml->sml_desc = ad_pwdAccountLockedTime;
1616                                 ml->sml_numvals = 0;
1617                                 ml->sml_values = NULL;
1618                                 ml->sml_nvalues = NULL;
1619                                 ml->sml_next = NULL;
1620                                 *prev = ml;
1621                         }
1622                         if ( a_fail && !got_del_fail ) {
1623                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1624                                 ml->sml_op = LDAP_MOD_DELETE;
1625                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1626                                 ml->sml_type.bv_val = NULL;
1627                                 ml->sml_desc = ad_pwdFailureTime;
1628                                 ml->sml_numvals = 0;
1629                                 ml->sml_values = NULL;
1630                                 ml->sml_nvalues = NULL;
1631                                 ml->sml_next = NULL;
1632                                 *prev = ml;
1633                         }
1634                 }
1635                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1636                 be_entry_release_r( op, e );
1637                 return SLAP_CB_CONTINUE;
1638         }
1639
1640         /* Did we receive a password policy request control? */
1641         if ( op->o_ctrlflag[ppolicy_cid] ) {
1642                 send_ctrl = 1;
1643         }
1644
1645         /* See if this is a pwdModify exop. If so, we can
1646          * access the plaintext passwords from that request.
1647          */
1648         {
1649                 slap_callback *sc;
1650
1651                 for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
1652                         if ( sc->sc_response == slap_null_cb &&
1653                                 sc->sc_private ) {
1654                                 req_pwdexop_s *qpw = sc->sc_private;
1655                                 newpw = qpw->rs_new;
1656                                 oldpw = qpw->rs_old;
1657                                 is_pwdexop = 1;
1658                                 break;
1659                         }
1660                 }
1661         }
1662
1663         ppolicy_get( op, e, &pp );
1664
1665         for ( ml = op->orm_modlist,
1666                         pwmod = 0, mod_pw_only = 1,
1667                         deladd = 0, delmod = NULL,
1668                         addmod = NULL,
1669                         zapReset = 1;
1670                 ml != NULL; modtail = ml, ml = ml->sml_next )
1671         {
1672                 if ( ml->sml_desc == pp.ad ) {
1673                         pwmod = 1;
1674                         pwmop = ml->sml_op;
1675                         if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
1676                                 (ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
1677                         {
1678                                 deladd = 1;
1679                                 delmod = ml;
1680                         }
1681
1682                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1683                                 (ml->sml_op == LDAP_MOD_REPLACE))
1684                         {
1685                                 if ( ml->sml_values && !BER_BVISNULL( &ml->sml_values[0] )) {
1686                                         if ( deladd == 1 )
1687                                                 deladd = 2;
1688
1689                                         /* FIXME: there's no easy way to ensure
1690                                          * that add does not cause multiple
1691                                          * userPassword values; one way (that
1692                                          * would be consistent with the single
1693                                          * password constraint) would be to turn
1694                                          * add into replace); another would be
1695                                          * to disallow add.
1696                                          *
1697                                          * Let's check at least that a single value
1698                                          * is being added
1699                                          */
1700                                         if ( addmod || !BER_BVISNULL( &ml->sml_values[ 1 ] ) ) {
1701                                                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1702                                                 rs->sr_text = "Password policy only allows one password value";
1703                                                 goto return_results;
1704                                         }
1705
1706                                         addmod = ml;
1707                                 } else {
1708                                         /* replace can have no values, add cannot */
1709                                         assert( ml->sml_op == LDAP_MOD_REPLACE );
1710                                 }
1711                         }
1712
1713                 } else if ( !(ml->sml_flags & SLAP_MOD_INTERNAL) && !is_at_operational( ml->sml_desc->ad_type ) ) {
1714                         mod_pw_only = 0;
1715                         /* modifying something other than password */
1716                 }
1717
1718                 /*
1719                  * If there is a request to explicitly add a pwdReset
1720                  * attribute, then we suppress the normal behaviour on
1721                  * password change, which is to remove the pwdReset
1722                  * attribute.
1723                  *
1724                  * This enables an administrator to assign a new password
1725                  * and place a "must reset" flag on the entry, which will
1726                  * stay until the user explicitly changes his/her password.
1727                  */
1728                 if (ml->sml_desc == ad_pwdReset ) {
1729                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1730                                 (ml->sml_op == LDAP_MOD_REPLACE))
1731                                 zapReset = 0;
1732                 }
1733         }
1734
1735         if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
1736                 if ( dn_match( &op->o_conn->c_ndn,
1737                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1738                         Debug( LDAP_DEBUG_TRACE,
1739                                 "connection restricted to password changing only\n", 0, 0, 0 );
1740                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1741                         rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
1742                         pErr = PP_changeAfterReset;
1743                         goto return_results;
1744                 } else {
1745                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1746                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1747                 }
1748         }
1749
1750         /*
1751          * if we have a "safe password modify policy", then we need to check if we're doing
1752          * a delete (with the old password), followed by an add (with the new password).
1753          *
1754          * If we got just a delete with nothing else, just let it go. We also skip all the checks if
1755          * the root user is bound. Root can do anything, including avoid the policies.
1756          */
1757
1758         if (!pwmod) goto do_modify;
1759
1760         /*
1761          * Build the password history list in ascending time order
1762          * We need this, even if the user is root, in order to maintain
1763          * the pwdHistory operational attributes properly.
1764          */
1765         if (addmod && pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
1766                 struct berval oldpw;
1767                 time_t oldtime;
1768
1769                 for(i=0; ha->a_nvals[i].bv_val; i++) {
1770                         rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
1771                                 &oldtime, &oldpw );
1772
1773                         if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
1774
1775                         if (oldpw.bv_val) {
1776                                 add_to_pwd_history( &tl, oldtime, &oldpw,
1777                                         &(ha->a_nvals[i]) );
1778                                 oldpw.bv_val = NULL;
1779                                 oldpw.bv_len = 0;
1780                         }
1781                 }
1782                 for(p=tl; p; p=p->next, hsize++); /* count history size */
1783         }
1784
1785         if (be_isroot( op )) goto do_modify;
1786
1787         if (!pp.pwdAllowUserChange) {
1788                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1789                 rs->sr_text = "User alteration of password is not allowed";
1790                 pErr = PP_passwordModNotAllowed;
1791                 goto return_results;
1792         }
1793
1794         /* Just deleting? */
1795         if (!addmod) {
1796                 /* skip everything else */
1797                 pwmod = 0;
1798                 goto do_modify;
1799         }
1800
1801         /* This is a pwdModify exop that provided the old pw.
1802          * We need to create a Delete mod for this old pw and
1803          * let the matching value get found later
1804          */
1805         if (pp.pwdSafeModify && oldpw.bv_val ) {
1806                 ml = (Modifications *)ch_calloc( sizeof( Modifications ), 1 );
1807                 ml->sml_op = LDAP_MOD_DELETE;
1808                 ml->sml_flags = SLAP_MOD_INTERNAL;
1809                 ml->sml_desc = pp.ad;
1810                 ml->sml_type = pp.ad->ad_cname;
1811                 ml->sml_numvals = 1;
1812                 ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1813                 ber_dupbv( &ml->sml_values[0], &oldpw );
1814                 BER_BVZERO( &ml->sml_values[1] );
1815                 ml->sml_next = op->orm_modlist;
1816                 op->orm_modlist = ml;
1817                 delmod = ml;
1818                 deladd = 2;
1819         }
1820
1821         if (pp.pwdSafeModify && deladd != 2) {
1822                 Debug( LDAP_DEBUG_TRACE,
1823                         "change password must use DELETE followed by ADD/REPLACE\n",
1824                         0, 0, 0 );
1825                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1826                 rs->sr_text = "Must supply old password to be changed as well as new one";
1827                 pErr = PP_mustSupplyOldPassword;
1828                 goto return_results;
1829         }
1830
1831         /* Check age, but only if pwdReset is not TRUE */
1832         pa = attr_find( e->e_attrs, ad_pwdReset );
1833         if ((!pa || !bvmatch( &pa->a_nvals[0], &slap_true_bv )) &&
1834                 pp.pwdMinAge > 0) {
1835                 time_t pwtime = (time_t)-1, now;
1836                 int age;
1837
1838                 if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1839                         pwtime = parse_time( pa->a_nvals[0].bv_val );
1840                 now = slap_get_time();
1841                 age = (int)(now - pwtime);
1842                 if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
1843                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1844                         rs->sr_text = "Password is too young to change";
1845                         pErr = PP_passwordTooYoung;
1846                         goto return_results;
1847                 }
1848         }
1849
1850         /* pa is used in password history check below, be sure it's set */
1851         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
1852                 /*
1853                  * we have a password to check
1854                  */
1855                 bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
1856                 /* FIXME: no access checking? */
1857                 rc = slap_passwd_check( op, NULL, pa, bv, &txt );
1858                 if (rc != LDAP_SUCCESS) {
1859                         Debug( LDAP_DEBUG_TRACE,
1860                                 "old password check failed: %s\n", txt, 0, 0 );
1861
1862                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1863                         rs->sr_text = "Must supply correct old password to change to new one";
1864                         pErr = PP_mustSupplyOldPassword;
1865                         goto return_results;
1866
1867                 } else {
1868                         int i;
1869
1870                         /*
1871                          * replace the delete value with the (possibly hashed)
1872                          * value which is currently in the password.
1873                          */
1874                         for ( i = 0; !BER_BVISNULL( &delmod->sml_values[i] ); i++ ) {
1875                                 free( delmod->sml_values[i].bv_val );
1876                                 BER_BVZERO( &delmod->sml_values[i] );
1877                         }
1878                         free( delmod->sml_values );
1879                         delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
1880                         BER_BVZERO( &delmod->sml_values[1] );
1881                         ber_dupbv( &(delmod->sml_values[0]),  &(pa->a_nvals[0]) );
1882                 }
1883         }
1884
1885         bv = newpw.bv_val ? &newpw : &addmod->sml_values[0];
1886         if (pp.pwdCheckQuality > 0) {
1887
1888                 rc = check_password_quality( bv, &pp, &pErr, e, (char **)&txt );
1889                 if (rc != LDAP_SUCCESS) {
1890                         rs->sr_err = rc;
1891                         if ( txt ) {
1892                                 rs->sr_text = txt;
1893                                 free_txt = 1;
1894                         } else {
1895                                 rs->sr_text = "Password fails quality checking policy";
1896                         }
1897                         goto return_results;
1898                 }
1899         }
1900
1901         /* If pwdInHistory is zero, passwords may be reused */
1902         if (pa && pp.pwdInHistory > 0) {
1903                 /*
1904                  * Last check - the password history.
1905                  */
1906                 /* FIXME: no access checking? */
1907                 if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
1908                         /*
1909                          * This is bad - it means that the user is attempting
1910                          * to set the password to the same as the old one.
1911                          */
1912                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1913                         rs->sr_text = "Password is not being changed from existing value";
1914                         pErr = PP_passwordInHistory;
1915                         goto return_results;
1916                 }
1917
1918                 /*
1919                  * Iterate through the password history, and fail on any
1920                  * password matches.
1921                  */
1922                 at = *pa;
1923                 at.a_vals = cr;
1924                 cr[1].bv_val = NULL;
1925                 for(p=tl; p; p=p->next) {
1926                         cr[0] = p->pw;
1927                         /* FIXME: no access checking? */
1928                         rc = slap_passwd_check( op, NULL, &at, bv, &txt );
1929
1930                         if (rc != LDAP_SUCCESS) continue;
1931
1932                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1933                         rs->sr_text = "Password is in history of old passwords";
1934                         pErr = PP_passwordInHistory;
1935                         goto return_results;
1936                 }
1937         }
1938
1939 do_modify:
1940         if (pwmod) {
1941                 struct berval timestamp;
1942                 char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1943                 time_t now = slap_get_time();
1944
1945                 /* If the conn is restricted, set a callback to clear it
1946                  * if the pwmod succeeds
1947                  */
1948                 if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1949                         slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
1950                                 op->o_tmpmemctx );
1951                         sc->sc_next = op->o_callback;
1952                         /* Must use sc_response to insure we reset on success, before
1953                          * the client sees the response. Must use sc_cleanup to insure
1954                          * that it gets cleaned up if sc_response is not called.
1955                          */
1956                         sc->sc_response = ppolicy_mod_cb;
1957                         sc->sc_cleanup = ppolicy_mod_cb;
1958                         op->o_callback = sc;
1959                 }
1960
1961                 /*
1962                  * keep the necessary pwd.. operational attributes
1963                  * up to date.
1964                  */
1965
1966                 timestamp.bv_val = timebuf;
1967                 timestamp.bv_len = sizeof(timebuf);
1968                 slap_timestamp( &now, &timestamp );
1969
1970                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1971                 mods->sml_desc = ad_pwdChangedTime;
1972                 if (pwmop != LDAP_MOD_DELETE) {
1973                         mods->sml_op = LDAP_MOD_REPLACE;
1974                         mods->sml_numvals = 1;
1975                         mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1976                         ber_dupbv( &mods->sml_values[0], &timestamp );
1977                         BER_BVZERO( &mods->sml_values[1] );
1978                         assert( !BER_BVISNULL( &mods->sml_values[0] ) );
1979
1980                 } else {
1981                         mods->sml_op = LDAP_MOD_DELETE;
1982                 }
1983                 mods->sml_flags = SLAP_MOD_INTERNAL;
1984                 mods->sml_next = NULL;
1985                 modtail->sml_next = mods;
1986                 modtail = mods;
1987
1988                 if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
1989                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1990                         mods->sml_op = LDAP_MOD_DELETE;
1991                         mods->sml_desc = ad_pwdGraceUseTime;
1992                         mods->sml_flags = SLAP_MOD_INTERNAL;
1993                         mods->sml_next = NULL;
1994                         modtail->sml_next = mods;
1995                         modtail = mods;
1996                 }
1997
1998                 if (attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
1999                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2000                         mods->sml_op = LDAP_MOD_DELETE;
2001                         mods->sml_desc = ad_pwdAccountLockedTime;
2002                         mods->sml_flags = SLAP_MOD_INTERNAL;
2003                         mods->sml_next = NULL;
2004                         modtail->sml_next = mods;
2005                         modtail = mods;
2006                 }
2007
2008                 if (attr_find(e->e_attrs, ad_pwdFailureTime )) {
2009                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2010                         mods->sml_op = LDAP_MOD_DELETE;
2011                         mods->sml_desc = ad_pwdFailureTime;
2012                         mods->sml_flags = SLAP_MOD_INTERNAL;
2013                         mods->sml_next = NULL;
2014                         modtail->sml_next = mods;
2015                         modtail = mods;
2016                 }
2017
2018                 /* Delete the pwdReset attribute, since it's being reset */
2019                 if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
2020                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2021                         mods->sml_op = LDAP_MOD_DELETE;
2022                         mods->sml_desc = ad_pwdReset;
2023                         mods->sml_flags = SLAP_MOD_INTERNAL;
2024                         mods->sml_next = NULL;
2025                         modtail->sml_next = mods;
2026                         modtail = mods;
2027                 }
2028
2029                 if (pp.pwdInHistory > 0) {
2030                         if (hsize >= pp.pwdInHistory) {
2031                                 /*
2032                                  * We use the >= operator, since we are going to add
2033                                  * the existing password attribute value into the
2034                                  * history - thus the cardinality of history values is
2035                                  * about to rise by one.
2036                                  *
2037                                  * If this would push it over the limit of history
2038                                  * values (remembering - the password policy could have
2039                                  * changed since the password was last altered), we must
2040                                  * delete at least 1 value from the pwdHistory list.
2041                                  *
2042                                  * In fact, we delete '(#pwdHistory attrs - max pwd
2043                                  * history length) + 1' values, starting with the oldest.
2044                                  * This is easily evaluated, since the linked list is
2045                                  * created in ascending time order.
2046                                  */
2047                                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2048                                 mods->sml_op = LDAP_MOD_DELETE;
2049                                 mods->sml_flags = SLAP_MOD_INTERNAL;
2050                                 mods->sml_desc = ad_pwdHistory;
2051                                 mods->sml_numvals = hsize - pp.pwdInHistory + 1;
2052                                 mods->sml_values = ch_calloc( sizeof( struct berval ),
2053                                         hsize - pp.pwdInHistory + 2 );
2054                                 BER_BVZERO( &mods->sml_values[ hsize - pp.pwdInHistory + 1 ] );
2055                                 for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
2056                                         BER_BVZERO( &mods->sml_values[i] );
2057                                         ber_dupbv( &(mods->sml_values[i]), &p->bv );
2058                                 }
2059                                 mods->sml_next = NULL;
2060                                 modtail->sml_next = mods;
2061                                 modtail = mods;
2062                         }
2063                         free_pwd_history_list( &tl );
2064
2065                         /*
2066                          * Now add the existing password into the history list.
2067                          * This will be executed even if the operation is to delete
2068                          * the password entirely.
2069                          *
2070                          * This isn't in the spec explicitly, but it seems to make
2071                          * sense that the password history list is the list of all
2072                          * previous passwords - even if they were deleted. Thus, if
2073                          * someone tries to add a historical password at some future
2074                          * point, it will fail.
2075                          */
2076                         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
2077                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
2078                                 mods->sml_op = LDAP_MOD_ADD;
2079                                 mods->sml_flags = SLAP_MOD_INTERNAL;
2080                                 mods->sml_type.bv_val = NULL;
2081                                 mods->sml_desc = ad_pwdHistory;
2082                                 mods->sml_nvalues = NULL;
2083                                 mods->sml_numvals = 1;
2084                                 mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
2085                                 mods->sml_values[ 1 ].bv_val = NULL;
2086                                 mods->sml_values[ 1 ].bv_len = 0;
2087                                 make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
2088                                 mods->sml_next = NULL;
2089                                 modtail->sml_next = mods;
2090                                 modtail = mods;
2091
2092                         } else {
2093                                 Debug( LDAP_DEBUG_TRACE,
2094                                 "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
2095                         }
2096                 }
2097
2098                 /*
2099                  * Controversial bit here. If the new password isn't hashed
2100                  * (ie, is cleartext), we probably should hash it according
2101                  * to the default hash. The reason for this is that we want
2102                  * to use the policy if possible, but if we hash the password
2103                  * before, then we're going to run into trouble when it
2104                  * comes time to check the password.
2105                  *
2106                  * Now, the right thing to do is to use the extended password
2107                  * modify operation, but not all software can do this,
2108                  * therefore it makes sense to hash the new password, now
2109                  * we know it passes the policy requirements.
2110                  *
2111                  * Of course, if the password is already hashed, then we
2112                  * leave it alone.
2113                  */
2114
2115                 if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
2116                         (password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS))
2117                 {
2118                         struct berval hpw, bv;
2119
2120                         slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
2121                         if (hpw.bv_val == NULL) {
2122                                         /*
2123                                          * hashing didn't work. Emit an error.
2124                                          */
2125                                 rs->sr_err = LDAP_OTHER;
2126                                 rs->sr_text = txt;
2127                                 goto return_results;
2128                         }
2129                         bv = addmod->sml_values[0];
2130                                 /* clear and discard the clear password */
2131                         memset(bv.bv_val, 0, bv.bv_len);
2132                         ber_memfree(bv.bv_val);
2133                         addmod->sml_values[0] = hpw;
2134                 }
2135         }
2136         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2137         be_entry_release_r( op, e );
2138         return SLAP_CB_CONTINUE;
2139
2140 return_results:
2141         free_pwd_history_list( &tl );
2142         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2143         be_entry_release_r( op, e );
2144         if ( send_ctrl ) {
2145                 ctrl = create_passcontrol( op, -1, -1, pErr );
2146                 oldctrls = add_passcontrol( op, rs, ctrl );
2147         }
2148         send_ldap_result( op, rs );
2149         if ( free_txt ) {
2150                 free( (char *)txt );
2151                 rs->sr_text = NULL;
2152         }
2153         if ( send_ctrl ) {
2154                 if ( is_pwdexop ) {
2155                         if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
2156                                 op->o_tmpfree( oldctrls, op->o_tmpmemctx );
2157                         }
2158                         oldctrls = NULL;
2159                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
2160
2161                 } else {
2162                         ctrls_cleanup( op, rs, oldctrls );
2163                 }
2164         }
2165         return rs->sr_err;
2166 }
2167
2168 static int
2169 ppolicy_parseCtrl(
2170         Operation *op,
2171         SlapReply *rs,
2172         LDAPControl *ctrl )
2173 {
2174         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
2175                 rs->sr_text = "passwordPolicyRequest control value not absent";
2176                 return LDAP_PROTOCOL_ERROR;
2177         }
2178         op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
2179                 ? SLAP_CONTROL_CRITICAL
2180                 : SLAP_CONTROL_NONCRITICAL;
2181
2182         return LDAP_SUCCESS;
2183 }
2184
2185 static int
2186 attrPretty(
2187         Syntax *syntax,
2188         struct berval *val,
2189         struct berval *out,
2190         void *ctx )
2191 {
2192         AttributeDescription *ad = NULL;
2193         const char *err;
2194         int code;
2195
2196         code = slap_bv2ad( val, &ad, &err );
2197         if ( !code ) {
2198                 ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
2199         }
2200         return code;
2201 }
2202
2203 static int
2204 attrNormalize(
2205         slap_mask_t use,
2206         Syntax *syntax,
2207         MatchingRule *mr,
2208         struct berval *val,
2209         struct berval *out,
2210         void *ctx )
2211 {
2212         AttributeDescription *ad = NULL;
2213         const char *err;
2214         int code;
2215
2216         code = slap_bv2ad( val, &ad, &err );
2217         if ( !code ) {
2218                 ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
2219         }
2220         return code;
2221 }
2222
2223 static int
2224 ppolicy_db_init(
2225         BackendDB *be,
2226         ConfigReply *cr
2227 )
2228 {
2229         slap_overinst *on = (slap_overinst *) be->bd_info;
2230
2231         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
2232                 /* do not allow slapo-ppolicy to be global by now (ITS#5858) */
2233                 if ( cr ){
2234                         snprintf( cr->msg, sizeof(cr->msg),
2235                                 "slapo-ppolicy cannot be global" );
2236                         Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
2237                 }
2238                 return 1;
2239         }
2240
2241         /* Has User Schema been initialized yet? */
2242         if ( !pwd_UsSchema[0].ad[0] ) {
2243                 const char *err;
2244                 int i, code;
2245
2246                 for (i=0; pwd_UsSchema[i].def; i++) {
2247                         code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
2248                         if ( code ) {
2249                                 if ( cr ){
2250                                         snprintf( cr->msg, sizeof(cr->msg),
2251                                                 "User Schema load failed for attribute \"%s\". Error code %d: %s",
2252                                                 pwd_UsSchema[i].def, code, err );
2253                                         Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
2254                                 }
2255                                 return code;
2256                         }
2257                 }
2258                 {
2259                         Syntax *syn;
2260                         MatchingRule *mr;
2261
2262                         syn = ch_malloc( sizeof( Syntax ));
2263                         *syn = *ad_pwdAttribute->ad_type->sat_syntax;
2264                         syn->ssyn_pretty = attrPretty;
2265                         ad_pwdAttribute->ad_type->sat_syntax = syn;
2266
2267                         mr = ch_malloc( sizeof( MatchingRule ));
2268                         *mr = *ad_pwdAttribute->ad_type->sat_equality;
2269                         mr->smr_normalize = attrNormalize;
2270                         ad_pwdAttribute->ad_type->sat_equality = mr;
2271                 }
2272         }
2273
2274         on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
2275
2276         if ( dtblsize && !pwcons ) {
2277                 /* accommodate for c_conn_idx == -1 */
2278                 pwcons = ch_calloc( sizeof(pw_conn), dtblsize + 1 );
2279                 pwcons++;
2280         }
2281
2282         return 0;
2283 }
2284
2285 static int
2286 ppolicy_db_open(
2287         BackendDB *be,
2288         ConfigReply *cr
2289 )
2290 {
2291         ov_count++;
2292         return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2293 }
2294
2295 static int
2296 ppolicy_close(
2297         BackendDB *be,
2298         ConfigReply *cr
2299 )
2300 {
2301         slap_overinst *on = (slap_overinst *) be->bd_info;
2302         pp_info *pi = on->on_bi.bi_private;
2303
2304         /* Perhaps backover should provide bi_destroy hooks... */
2305         ov_count--;
2306         if ( ov_count <=0 && pwcons ) {
2307                 pwcons--;
2308                 free( pwcons );
2309                 pwcons = NULL;
2310         }
2311         free( pi->def_policy.bv_val );
2312         free( pi );
2313
2314         return 0;
2315 }
2316
2317 static char *extops[] = {
2318         LDAP_EXOP_MODIFY_PASSWD,
2319         NULL
2320 };
2321
2322 static slap_overinst ppolicy;
2323
2324 int ppolicy_initialize()
2325 {
2326         int i, code;
2327
2328         for (i=0; pwd_OpSchema[i].def; i++) {
2329                 code = register_at( pwd_OpSchema[i].def, pwd_OpSchema[i].ad, 0 );
2330                 if ( code ) {
2331                         Debug( LDAP_DEBUG_ANY,
2332                                 "ppolicy_initialize: register_at failed\n", 0, 0, 0 );
2333                         return code;
2334                 }
2335                 /* Allow Manager to set these as needed */
2336                 if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
2337                         (*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
2338                                 SLAP_AT_MANAGEABLE;
2339                 }
2340         }
2341
2342         code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
2343                 SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
2344                 ppolicy_parseCtrl, &ppolicy_cid );
2345         if ( code != LDAP_SUCCESS ) {
2346                 Debug( LDAP_DEBUG_ANY, "Failed to register control %d\n", code, 0, 0 );
2347                 return code;
2348         }
2349
2350         ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
2351
2352         ppolicy.on_bi.bi_type = "ppolicy";
2353         ppolicy.on_bi.bi_db_init = ppolicy_db_init;
2354         ppolicy.on_bi.bi_db_open = ppolicy_db_open;
2355         ppolicy.on_bi.bi_db_close = ppolicy_close;
2356
2357         ppolicy.on_bi.bi_op_add = ppolicy_add;
2358         ppolicy.on_bi.bi_op_bind = ppolicy_bind;
2359         ppolicy.on_bi.bi_op_compare = ppolicy_compare;
2360         ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
2361         ppolicy.on_bi.bi_op_modify = ppolicy_modify;
2362         ppolicy.on_bi.bi_op_search = ppolicy_restrict;
2363         ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
2364
2365         ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
2366         code = config_register_schema( ppolicycfg, ppolicyocs );
2367         if ( code ) return code;
2368
2369         return overlay_register( &ppolicy );
2370 }
2371
2372 #if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
2373 int init_module(int argc, char *argv[]) {
2374         return ppolicy_initialize();
2375 }
2376 #endif
2377
2378 #endif  /* defined(SLAPD_OVER_PPOLICY) */