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