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 ((then = parse_time( vals[0].bv_val )) == (time_t)0)
 342                                 return 1;
 343
 344                         now = slap_get_time();
 345
 346                         /* Still in the future? not yet in effect */
 347                         if (now < then)
 348                                 return 0;
 349
 350                         if (!pp->pwdLockoutDuration)
 351                                 return 1;
 352
 353                         if (now < then + pp->pwdLockoutDuration)
 354                                 return 1;
 355
 356                         m = ch_calloc( sizeof(Modifications), 1 );
 357                         m->sml_op = LDAP_MOD_DELETE;
 358                         m->sml_flags = 0;
 359                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 360                         m->sml_desc = ad_pwdAccountLockedTime;
 361                         m->sml_next = *mod;
 362                         *mod = m;
 363                 }
 364         }
 365
 366         return 0;
 367 }
 368
 369 /* IMPLICIT TAGS, all context-specific */
 370 #define PPOLICY_WARNING 0xa0L   /* constructed + 0 */
 371 #define PPOLICY_ERROR 0x81L             /* primitive + 1 */
 372
 373 #define PPOLICY_EXPIRE 0x80L    /* primitive + 0 */
 374 #define PPOLICY_GRACE  0x81L    /* primitive + 1 */
 375
 376 static const char ppolicy_ctrl_oid[] = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
 377
 378 static LDAPControl *
 379 create_passcontrol( Operation *op, int exptime, int grace, LDAPPasswordPolicyError err )
 380 {
 381         BerElementBuffer berbuf, bb2;
 382         BerElement *ber = (BerElement *) &berbuf, *b2 = (BerElement *) &bb2;
 383         LDAPControl c = { 0 }, *cp;
 384         struct berval bv;
 385
 386         BER_BVZERO( &c.ldctl_value );
 387
 388         ber_init2( ber, NULL, LBER_USE_DER );
 389         ber_printf( ber, "{" /*}*/ );
 390
 391         if ( exptime >= 0 ) {
 392                 ber_init2( b2, NULL, LBER_USE_DER );
 393                 ber_printf( b2, "ti", PPOLICY_EXPIRE, exptime );
 394                 ber_flatten2( b2, &bv, 1 );
 395                 (void)ber_free_buf(b2);
 396                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 397                 ch_free( bv.bv_val );
 398         } else if ( grace > 0 ) {
 399                 ber_init2( b2, NULL, LBER_USE_DER );
 400                 ber_printf( b2, "ti", PPOLICY_GRACE, grace );
 401                 ber_flatten2( b2, &bv, 1 );
 402                 (void)ber_free_buf(b2);
 403                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 404                 ch_free( bv.bv_val );
 405         }
 406
 407         if (err != PP_noError ) {
 408                 ber_printf( ber, "te", PPOLICY_ERROR, err );
 409         }
 410         ber_printf( ber, /*{*/ "N}" );
 411
 412         if (ber_flatten2( ber, &c.ldctl_value, 0 ) == -1) {
 413                 return NULL;
 414         }
 415         cp = op->o_tmpalloc( sizeof( LDAPControl ) + c.ldctl_value.bv_len, op->o_tmpmemctx );
 416         cp->ldctl_oid = (char *)ppolicy_ctrl_oid;
 417         cp->ldctl_iscritical = 0;
 418         cp->ldctl_value.bv_val = (char *)&cp[1];
 419         cp->ldctl_value.bv_len = c.ldctl_value.bv_len;
 420         AC_MEMCPY( cp->ldctl_value.bv_val, c.ldctl_value.bv_val, c.ldctl_value.bv_len );
 421         (void)ber_free_buf(ber);
 422
 423         return cp;
 424 }
 425
 426 static LDAPControl **
 427 add_passcontrol( Operation *op, SlapReply *rs, LDAPControl *ctrl )
 428 {
 429         LDAPControl **ctrls, **oldctrls = rs->sr_ctrls;
 430         int n;
 431
 432         n = 0;
 433         if ( oldctrls ) {
 434                 for ( ; oldctrls[n]; n++ )
 435                         ;
 436         }
 437         n += 2;
 438
 439         ctrls = op->o_tmpcalloc( sizeof( LDAPControl * ), n, op->o_tmpmemctx );
 440
 441         n = 0;
 442         if ( oldctrls ) {
 443                 for ( ; oldctrls[n]; n++ ) {
 444                         ctrls[n] = oldctrls[n];
 445                 }
 446         }
 447         ctrls[n] = ctrl;
 448         ctrls[n+1] = NULL;
 449
 450         rs->sr_ctrls = ctrls;
 451
 452         return oldctrls;
 453 }
 454
 455 static void
 456 ppolicy_get( Operation *op, Entry *e, PassPolicy *pp )
 457 {
 458         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 459         pp_info *pi = on->on_bi.bi_private;
 460         Attribute *a;
 461         BerVarray vals;
 462         int rc;
 463         Entry *pe = NULL;
 464 #if 0
 465         const char *text;
 466 #endif
 467
 468         memset( pp, 0, sizeof(PassPolicy) );
 469
 470         pp->ad = slap_schema.si_ad_userPassword;
 471
 472         /* Users can change their own password by default */
 473         pp->pwdAllowUserChange = 1;
 474
 475         if ((a = attr_find( e->e_attrs, ad_pwdPolicySubentry )) == NULL) {
 476                 /*
 477                  * entry has no password policy assigned - use default
 478                  */
 479                 vals = &pi->def_policy;
 480                 if ( !vals->bv_val )
 481                         goto defaultpol;
 482         } else {
 483                 vals = a->a_nvals;
 484                 if (vals[0].bv_val == NULL) {
 485                         Debug( LDAP_DEBUG_ANY,
 486                                 "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
 487                         goto defaultpol;
 488                 }
 489         }
 490
 491         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 492         rc = be_entry_get_rw( op, vals, NULL, NULL, 0, &pe );
 493         op->o_bd->bd_info = (BackendInfo *)on;
 494
 495         if ( rc ) goto defaultpol;
 496
 497 #if 0   /* Only worry about userPassword for now */
 498         if ((a = attr_find( pe->e_attrs, ad_pwdAttribute )))
 499                 slap_bv2ad( &a->a_vals[0], &pp->ad, &text );
 500 #endif
 501
 502         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinAge ) )
 503                         && lutil_atoi( &pp->pwdMinAge, a->a_vals[0].bv_val ) != 0 )
 504                 goto defaultpol;
 505         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxAge ) )
 506                         && lutil_atoi( &pp->pwdMaxAge, a->a_vals[0].bv_val ) != 0 )
 507                 goto defaultpol;
 508         if ( ( a = attr_find( pe->e_attrs, ad_pwdInHistory ) )
 509                         && lutil_atoi( &pp->pwdInHistory, a->a_vals[0].bv_val ) != 0 )
 510                 goto defaultpol;
 511         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckQuality ) )
 512                         && lutil_atoi( &pp->pwdCheckQuality, a->a_vals[0].bv_val ) != 0 )
 513                 goto defaultpol;
 514         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinLength ) )
 515                         && lutil_atoi( &pp->pwdMinLength, a->a_vals[0].bv_val ) != 0 )
 516                 goto defaultpol;
 517         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxFailure ) )
 518                         && lutil_atoi( &pp->pwdMaxFailure, a->a_vals[0].bv_val ) != 0 )
 519                 goto defaultpol;
 520         if ( ( a = attr_find( pe->e_attrs, ad_pwdGraceAuthNLimit ) )
 521                         && lutil_atoi( &pp->pwdGraceAuthNLimit, a->a_vals[0].bv_val ) != 0 )
 522                 goto defaultpol;
 523         if ( ( a = attr_find( pe->e_attrs, ad_pwdExpireWarning ) )
 524                         && lutil_atoi( &pp->pwdExpireWarning, a->a_vals[0].bv_val ) != 0 )
 525                 goto defaultpol;
 526         if ( ( a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval ) )
 527                         && lutil_atoi( &pp->pwdFailureCountInterval, a->a_vals[0].bv_val ) != 0 )
 528                 goto defaultpol;
 529         if ( ( a = attr_find( pe->e_attrs, ad_pwdLockoutDuration ) )
 530                         && lutil_atoi( &pp->pwdLockoutDuration, a->a_vals[0].bv_val ) != 0 )
 531                 goto defaultpol;
 532
 533         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckModule ) ) ) {
 534                 strncpy( pp->pwdCheckModule, a->a_vals[0].bv_val,
 535                         sizeof(pp->pwdCheckModule) );
 536                 pp->pwdCheckModule[sizeof(pp->pwdCheckModule)-1] = '\0';
 537         }
 538
 539         if ((a = attr_find( pe->e_attrs, ad_pwdLockout )))
 540                 pp->pwdLockout = bvmatch( &a->a_nvals[0], &slap_true_bv );
 541         if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
 542                 pp->pwdMustChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 543         if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
 544                 pp->pwdAllowUserChange = bvmatch( &a->a_nvals[0], &slap_true_bv );
 545         if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
 546                 pp->pwdSafeModify = bvmatch( &a->a_nvals[0], &slap_true_bv );
 547
 548         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 549         be_entry_release_r( op, pe );
 550         op->o_bd->bd_info = (BackendInfo *)on;
 551
 552         return;
 553
 554 defaultpol:
 555         Debug( LDAP_DEBUG_TRACE,
 556                 "ppolicy_get: using default policy\n", 0, 0, 0 );
 557         return;
 558 }
 559
 560 static int
 561 password_scheme( struct berval *cred, struct berval *sch )
 562 {
 563         int e;
 564
 565         assert( cred != NULL );
 566
 567         if (sch) {
 568                 sch->bv_val = NULL;
 569                 sch->bv_len = 0;
 570         }
 571
 572         if ((cred->bv_len == 0) || (cred->bv_val == NULL) ||
 573                 (cred->bv_val[0] != '{')) return LDAP_OTHER;
 574
 575         for(e = 1; cred->bv_val[e] && cred->bv_val[e] != '}'; e++);
 576         if (cred->bv_val[e]) {
 577                 int rc;
 578                 rc = lutil_passwd_scheme( cred->bv_val );
 579                 if (rc) {
 580                         if (sch) {
 581                                 sch->bv_val = cred->bv_val;
 582                                 sch->bv_len = e;
 583                         }
 584                         return LDAP_SUCCESS;
 585                 }
 586         }
 587         return LDAP_OTHER;
 588 }
 589
 590 static int
 591 check_password_quality( struct berval *cred, PassPolicy *pp, LDAPPasswordPolicyError *err, Entry *e, char **txt )
 592 {
 593         int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
 594         char *ptr = cred->bv_val;
 595         struct berval sch;
 596
 597         assert( cred != NULL );
 598         assert( pp != NULL );
 599         assert( txt != NULL );
 600
 601         *txt = NULL;
 602
 603         if ((cred->bv_len == 0) || (pp->pwdMinLength > cred->bv_len)) {
 604                 rc = LDAP_CONSTRAINT_VIOLATION;
 605                 if ( err ) *err = PP_passwordTooShort;
 606                 return rc;
 607         }
 608
 609         /*
 610          * We need to know if the password is already hashed - if so
 611          * what scheme is it. The reason being that the "hash" of
 612          * {cleartext} still allows us to check the password.
 613          */
 614         rc = password_scheme( cred, &sch );
 615         if (rc == LDAP_SUCCESS) {
 616                 if ((sch.bv_val) && (strncasecmp( sch.bv_val, "{cleartext}",
 617                         sch.bv_len ) == 0)) {
 618                         /*
 619                          * We can check the cleartext "hash"
 620                          */
 621                         ptr = cred->bv_val + sch.bv_len;
 622                 } else {
 623                         /* everything else, we can't check */
 624                         if (pp->pwdCheckQuality == 2) {
 625                                 rc = LDAP_CONSTRAINT_VIOLATION;
 626                                 if (err) *err = PP_insufficientPasswordQuality;
 627                                 return rc;
 628                         }
 629                         /*
 630                          * We can't check the syntax of the password, but it's not
 631                          * mandatory (according to the policy), so we return success.
 632                          */
 633
 634                         return LDAP_SUCCESS;
 635                 }
 636         }
 637
 638         rc = LDAP_SUCCESS;
 639
 640         if (pp->pwdCheckModule[0]) {
 641 #ifdef SLAPD_MODULES
 642                 lt_dlhandle mod;
 643                 const char *err;
 644
 645                 if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
 646                         err = lt_dlerror();
 647
 648                         Debug(LDAP_DEBUG_ANY,
 649                         "check_password_quality: lt_dlopen failed: (%s) %s.\n",
 650                                 pp->pwdCheckModule, err, 0 );
 651                         ok = LDAP_OTHER; /* internal error */
 652                 } else {
 653                         /* FIXME: the error message ought to be passed thru a
 654                          * struct berval, with preallocated buffer and size
 655                          * passed in. Module can still allocate a buffer for
 656                          * it if the provided one is too small.
 657                          */
 658                         int (*prog)( char *passwd, char **text, Entry *ent );
 659
 660                         if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
 661                                 err = lt_dlerror();
 662
 663                                 Debug(LDAP_DEBUG_ANY,
 664                                         "check_password_quality: lt_dlsym failed: (%s) %s.\n",
 665                                         pp->pwdCheckModule, err, 0 );
 666                                 ok = LDAP_OTHER;
 667                         } else {
 668                                 ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
 669                                 ok = prog( ptr, txt, e );
 670                                 ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
 671                                 if (ok != LDAP_SUCCESS) {
 672                                         Debug(LDAP_DEBUG_ANY,
 673                                                 "check_password_quality: module error: (%s) %s.[%d]\n",
 674                                                 pp->pwdCheckModule, *txt ? *txt : "", ok );
 675                                 }
 676                         }
 677
 678                         lt_dlclose( mod );
 679                 }
 680 #else
 681         Debug(LDAP_DEBUG_ANY, "check_password_quality: external modules not "
 682                 "supported. pwdCheckModule ignored.\n", 0, 0, 0);
 683 #endif /* SLAPD_MODULES */
 684         }
 685
 686
 687         if (ok != LDAP_SUCCESS) {
 688                 rc = LDAP_CONSTRAINT_VIOLATION;
 689                 if (err) *err = PP_insufficientPasswordQuality;
 690         }
 691
 692         return rc;
 693 }
 694
 695 static int
 696 parse_pwdhistory( struct berval *bv, char **oid, time_t *oldtime, struct berval *oldpw )
 697 {
 698         char *ptr;
 699         struct berval nv, npw;
 700         ber_len_t i, j;
 701
 702         assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
 703
 704         if ( oid ) {
 705                 *oid = 0;
 706         }
 707         *oldtime = (time_t)-1;
 708         BER_BVZERO( oldpw );
 709
 710         ber_dupbv( &nv, bv );
 711
 712         /* first get the time field */
 713         for ( i = 0; (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 714                 ;
 715         if ( i == nv.bv_len ) {
 716                 goto exit_failure; /* couldn't locate the '#' separator */
 717         }
 718         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 719         ptr = nv.bv_val;
 720         *oldtime = parse_time( ptr );
 721         if (*oldtime == (time_t)-1) {
 722                 goto exit_failure;
 723         }
 724
 725         /* get the OID field */
 726         for (ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 727                 ;
 728         if ( i == nv.bv_len ) {
 729                 goto exit_failure; /* couldn't locate the '#' separator */
 730         }
 731         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 732         if ( oid ) {
 733                 *oid = ber_strdup( ptr );
 734         }
 735
 736         /* get the length field */
 737         for ( ptr = &(nv.bv_val[i]); (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++ )
 738                 ;
 739         if ( i == nv.bv_len ) {
 740                 goto exit_failure; /* couldn't locate the '#' separator */
 741         }
 742         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 743         oldpw->bv_len = strtol( ptr, NULL, 10 );
 744         if (errno == ERANGE) {
 745                 goto exit_failure;
 746         }
 747
 748         /* lastly, get the octets of the string */
 749         for ( j = i, ptr = &(nv.bv_val[i]); i < nv.bv_len; i++ )
 750                 ;
 751         if ( i - j != oldpw->bv_len) {
 752                 goto exit_failure; /* length is wrong */
 753         }
 754
 755         npw.bv_val = ptr;
 756         npw.bv_len = oldpw->bv_len;
 757         ber_dupbv( oldpw, &npw );
 758         ber_memfree( nv.bv_val );
 759
 760         return LDAP_SUCCESS;
 761
 762 exit_failure:;
 763         if ( oid && *oid ) {
 764                 ber_memfree(*oid);
 765                 *oid = NULL;
 766         }
 767         if ( oldpw->bv_val ) {
 768                 ber_memfree( oldpw->bv_val);
 769                 BER_BVZERO( oldpw );
 770         }
 771         ber_memfree( nv.bv_val );
 772
 773         return LDAP_OTHER;
 774 }
 775
 776 static void
 777 add_to_pwd_history( pw_hist **l, time_t t,
 778                     struct berval *oldpw, struct berval *bv )
 779 {
 780         pw_hist *p, *p1, *p2;
 781
 782         if (!l) return;
 783
 784         p = ch_malloc( sizeof( pw_hist ));
 785         p->pw = *oldpw;
 786         ber_dupbv( &p->bv, bv );
 787         p->t = t;
 788         p->next = NULL;
 789
 790         if (*l == NULL) {
 791                 /* degenerate case */
 792                 *l = p;
 793                 return;
 794         }
 795         /*
 796          * advance p1 and p2 such that p1 is the node before the
 797          * new one, and p2 is the node after it
 798          */
 799         for (p1 = NULL, p2 = *l; p2 && p2->t <= t; p1 = p2, p2=p2->next );
 800         p->next = p2;
 801         if (p1 == NULL) { *l = p; return; }
 802         p1->next = p;
 803 }
 804
 805 #ifndef MAX_PWD_HISTORY_SZ
 806 #define MAX_PWD_HISTORY_SZ 1024
 807 #endif /* MAX_PWD_HISTORY_SZ */
 808
 809 static void
 810 make_pwd_history_value( char *timebuf, struct berval *bv, Attribute *pa )
 811 {
 812         char str[ MAX_PWD_HISTORY_SZ ];
 813         int nlen;
 814
 815         snprintf( str, MAX_PWD_HISTORY_SZ,
 816                   "%s#%s#%lu#", timebuf,
 817                   pa->a_desc->ad_type->sat_syntax->ssyn_oid,
 818                   (unsigned long) pa->a_nvals[0].bv_len );
 819         str[MAX_PWD_HISTORY_SZ-1] = 0;
 820         nlen = strlen(str);
 821
 822         /*
 823          * We have to assume that the string is a string of octets,
 824          * not readable characters. In reality, yes, it probably is
 825          * a readable (ie, base64) string, but we can't count on that
 826          * Hence, while the first 3 fields of the password history
 827          * are definitely readable (a timestamp, an OID and an integer
 828          * length), the remaining octets of the actual password
 829          * are deemed to be binary data.
 830          */
 831         AC_MEMCPY( str + nlen, pa->a_nvals[0].bv_val, pa->a_nvals[0].bv_len );
 832         nlen += pa->a_nvals[0].bv_len;
 833         bv->bv_val = ch_malloc( nlen + 1 );
 834         AC_MEMCPY( bv->bv_val, str, nlen );
 835         bv->bv_val[nlen] = '\0';
 836         bv->bv_len = nlen;
 837 }
 838
 839 static void
 840 free_pwd_history_list( pw_hist **l )
 841 {
 842         pw_hist *p;
 843
 844         if (!l) return;
 845         p = *l;
 846         while (p) {
 847                 pw_hist *pp = p->next;
 848
 849                 free(p->pw.bv_val);
 850                 free(p->bv.bv_val);
 851                 free(p);
 852                 p = pp;
 853         }
 854         *l = NULL;
 855 }
 856
 857 typedef struct ppbind {
 858         slap_overinst *on;
 859         int send_ctrl;
 860         int set_restrict;
 861         LDAPControl **oldctrls;
 862         Modifications *mod;
 863         LDAPPasswordPolicyError pErr;
 864         PassPolicy pp;
 865 } ppbind;
 866
 867 static void
 868 ctrls_cleanup( Operation *op, SlapReply *rs, LDAPControl **oldctrls )
 869 {
 870         int n;
 871
 872         assert( rs->sr_ctrls != NULL );
 873         assert( rs->sr_ctrls[0] != NULL );
 874
 875         for ( n = 0; rs->sr_ctrls[n]; n++ ) {
 876                 if ( rs->sr_ctrls[n]->ldctl_oid == ppolicy_ctrl_oid ) {
 877                         op->o_tmpfree( rs->sr_ctrls[n], op->o_tmpmemctx );
 878                         rs->sr_ctrls[n] = (LDAPControl *)(-1);
 879                         break;
 880                 }
 881         }
 882
 883         if ( rs->sr_ctrls[n] == NULL ) {
 884                 /* missed? */
 885         }
 886
 887         op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
 888
 889         rs->sr_ctrls = oldctrls;
 890 }
 891
 892 static int
 893 ppolicy_ctrls_cleanup( Operation *op, SlapReply *rs )
 894 {
 895         ppbind *ppb = op->o_callback->sc_private;
 896         if ( ppb->send_ctrl ) {
 897                 ctrls_cleanup( op, rs, ppb->oldctrls );
 898         }
 899         return SLAP_CB_CONTINUE;
 900 }
 901
 902 static int
 903 ppolicy_bind_response( Operation *op, SlapReply *rs )
 904 {
 905         ppbind *ppb = op->o_callback->sc_private;
 906         slap_overinst *on = ppb->on;
 907         Modifications *mod = ppb->mod, *m;
 908         int pwExpired = 0;
 909         int ngut = -1, warn = -1, age, rc;
 910         Attribute *a;
 911         time_t now, pwtime = (time_t)-1;
 912         char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 913         struct berval timestamp;
 914         BackendInfo *bi = op->o_bd->bd_info;
 915         Entry *e;
 916
 917         /* If we already know it's locked, just get on with it */
 918         if ( ppb->pErr != PP_noError ) {
 919                 goto locked;
 920         }
 921
 922         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 923         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 924         op->o_bd->bd_info = bi;
 925
 926         if ( rc != LDAP_SUCCESS ) {
 927                 return SLAP_CB_CONTINUE;
 928         }
 929
 930         now = slap_get_time(); /* stored for later consideration */
 931         timestamp.bv_val = nowstr;
 932         timestamp.bv_len = sizeof(nowstr);
 933         slap_timestamp( &now, &timestamp );
 934
 935         if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
 936                 int i = 0, fc = 0;
 937
 938                 m = ch_calloc( sizeof(Modifications), 1 );
 939                 m->sml_op = LDAP_MOD_ADD;
 940                 m->sml_flags = 0;
 941                 m->sml_type = ad_pwdFailureTime->ad_cname;
 942                 m->sml_desc = ad_pwdFailureTime;
 943                 m->sml_numvals = 1;
 944                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 945                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 946
 947                 ber_dupbv( &m->sml_values[0], &timestamp );
 948                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 949                 m->sml_next = mod;
 950                 mod = m;
 951
 952                 /*
 953                  * Count the pwdFailureTimes - if it's
 954                  * greater than the policy pwdMaxFailure,
 955                  * then lock the account.
 956                  */
 957                 if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
 958                         for(i=0; a->a_nvals[i].bv_val; i++) {
 959
 960                                 /*
 961                                  * If the interval is 0, then failures
 962                                  * stay on the record until explicitly
 963                                  * reset by successful authentication.
 964                                  */
 965                                 if (ppb->pp.pwdFailureCountInterval == 0) {
 966                                         fc++;
 967                                 } else if (now <=
 968                                                         parse_time(a->a_nvals[i].bv_val) +
 969                                                         ppb->pp.pwdFailureCountInterval) {
 970
 971                                         fc++;
 972                                 }
 973                                 /*
 974                                  * We only count those failures
 975                                  * which are not due to expire.
 976                                  */
 977                         }
 978                 }
 979
 980                 if ((ppb->pp.pwdMaxFailure > 0) &&
 981                         (fc >= ppb->pp.pwdMaxFailure - 1)) {
 982
 983                         /*
 984                          * We subtract 1 from the failure max
 985                          * because the new failure entry hasn't
 986                          * made it to the entry yet.
 987                          */
 988                         m = ch_calloc( sizeof(Modifications), 1 );
 989                         m->sml_op = LDAP_MOD_REPLACE;
 990                         m->sml_flags = 0;
 991                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 992                         m->sml_desc = ad_pwdAccountLockedTime;
 993                         m->sml_numvals = 1;
 994                         m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 995                         m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 996                         ber_dupbv( &m->sml_values[0], &timestamp );
 997                         ber_dupbv( &m->sml_nvalues[0], &timestamp );
 998                         m->sml_next = mod;
 999                         mod = m;
1000                 }
1001         } else if ( rs->sr_err == LDAP_SUCCESS ) {
1002                 if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1003                         pwtime = parse_time( a->a_nvals[0].bv_val );
1004
1005                 /* delete all pwdFailureTimes */
1006                 if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
1007                         m = ch_calloc( sizeof(Modifications), 1 );
1008                         m->sml_op = LDAP_MOD_DELETE;
1009                         m->sml_flags = 0;
1010                         m->sml_type = ad_pwdFailureTime->ad_cname;
1011                         m->sml_desc = ad_pwdFailureTime;
1012                         m->sml_next = mod;
1013                         mod = m;
1014                 }
1015
1016                 /*
1017                  * check to see if the password must be changed
1018                  */
1019                 if ( ppb->pp.pwdMustChange &&
1020                         (a = attr_find( e->e_attrs, ad_pwdReset )) &&
1021                         bvmatch( &a->a_nvals[0], &slap_true_bv ) )
1022                 {
1023                         /*
1024                          * need to inject client controls here to give
1025                          * more information. For the moment, we ensure
1026                          * that we are disallowed from doing anything
1027                          * other than change password.
1028                          */
1029                         if ( ppb->set_restrict ) {
1030                                 ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
1031                                         &op->o_conn->c_ndn );
1032                         }
1033
1034                         ppb->pErr = PP_changeAfterReset;
1035
1036                 } else {
1037                         /*
1038                          * the password does not need to be changed, so
1039                          * we now check whether the password has expired.
1040                          *
1041                          * We can skip this bit if passwords don't age in
1042                          * the policy. Also, if there was no pwdChangedTime
1043                          * attribute in the entry, the password never expires.
1044                          */
1045                         if (ppb->pp.pwdMaxAge == 0) goto grace;
1046
1047                         if (pwtime != (time_t)-1) {
1048                                 /*
1049                                  * Check: was the last change time of
1050                                  * the password older than the maximum age
1051                                  * allowed. (Ignore case 2 from I-D, it's just silly.)
1052                                  */
1053                                 if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
1054                         }
1055                 }
1056
1057 grace:
1058                 if (!pwExpired) goto check_expiring_password;
1059
1060                 if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
1061                         ngut = ppb->pp.pwdGraceAuthNLimit;
1062                 else {
1063                         for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
1064                         ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
1065                 }
1066
1067                 /*
1068                  * ngut is the number of remaining grace logins
1069                  */
1070                 Debug( LDAP_DEBUG_ANY,
1071                         "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
1072                         e->e_name.bv_val, ngut, 0);
1073
1074                 if (ngut < 1) {
1075                         ppb->pErr = PP_passwordExpired;
1076                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
1077                         goto done;
1078                 }
1079
1080                 /*
1081                  * Add a grace user time to the entry
1082                  */
1083                 m = ch_calloc( sizeof(Modifications), 1 );
1084                 m->sml_op = LDAP_MOD_ADD;
1085                 m->sml_flags = 0;
1086                 m->sml_type = ad_pwdGraceUseTime->ad_cname;
1087                 m->sml_desc = ad_pwdGraceUseTime;
1088                 m->sml_numvals = 1;
1089                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
1090                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
1091                 ber_dupbv( &m->sml_values[0], &timestamp );
1092                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
1093                 m->sml_next = mod;
1094                 mod = m;
1095
1096 check_expiring_password:
1097                 /*
1098                  * Now we need to check to see
1099                  * if it is about to expire, and if so, should the user
1100                  * be warned about it in the password policy control.
1101                  *
1102                  * If the password has expired, and we're in the grace period, then
1103                  * we don't need to do this bit. Similarly, if we don't have password
1104                  * aging, then there's no need to do this bit either.
1105                  */
1106                 if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
1107                         goto done;
1108
1109                 age = (int)(now - pwtime);
1110
1111                 /*
1112                  * We know that there is a password Change Time attribute - if
1113                  * there wasn't, then the pwdExpired value would be true, unless
1114                  * there is no password aging - and if there is no password aging,
1115                  * then this section isn't called anyway - you can't have an
1116                  * expiring password if there's no limit to expire.
1117                  */
1118                 if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
1119                         /*
1120                          * Set the warning value.
1121                          */
1122                         warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
1123                         if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
1124
1125                         Debug( LDAP_DEBUG_ANY,
1126                                 "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
1127                                 op->o_req_dn.bv_val, warn, 0 );
1128                 }
1129         }
1130
1131 done:
1132         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1133         be_entry_release_r( op, e );
1134
1135 locked:
1136         if ( mod ) {
1137                 Operation op2 = *op;
1138                 SlapReply r2 = { REP_RESULT };
1139                 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
1140                 pp_info *pi = on->on_bi.bi_private;
1141                 LDAPControl c, *ca[2];
1142
1143                 op2.o_tag = LDAP_REQ_MODIFY;
1144                 op2.o_callback = &cb;
1145                 op2.orm_modlist = mod;
1146                 op2.orm_no_opattrs = 0;
1147                 op2.o_dn = op->o_bd->be_rootdn;
1148                 op2.o_ndn = op->o_bd->be_rootndn;
1149
1150                 /* If this server is a shadow and forward_updates is true,
1151                  * use the frontend to perform this modify. That will trigger
1152                  * the update referral, which can then be forwarded by the
1153                  * chain overlay. Obviously the updateref and chain overlay
1154                  * must be configured appropriately for this to be useful.
1155                  */
1156                 if ( SLAP_SHADOW( op->o_bd ) && pi->forward_updates ) {
1157                         op2.o_bd = frontendDB;
1158
1159                         /* Must use Relax control since these are no-user-mod */
1160                         op2.o_relax = SLAP_CONTROL_CRITICAL;
1161                         op2.o_ctrls = ca;
1162                         ca[0] = &c;
1163                         ca[1] = NULL;
1164                         BER_BVZERO( &c.ldctl_value );
1165                         c.ldctl_iscritical = 1;
1166                         c.ldctl_oid = LDAP_CONTROL_RELAX;
1167                 } else {
1168                         /* If not forwarding, don't update opattrs */
1169                         if ( SLAP_SINGLE_SHADOW( op->o_bd ))
1170                                 op2.orm_no_opattrs = 1;
1171                         op2.o_bd->bd_info = (BackendInfo *)on->on_info;
1172                 }
1173                 rc = op2.o_bd->be_modify( &op2, &r2 );
1174                 slap_mods_free( mod, 1 );
1175         }
1176
1177         if ( ppb->send_ctrl ) {
1178                 LDAPControl *ctrl = NULL;
1179                 pp_info *pi = on->on_bi.bi_private;
1180
1181                 /* Do we really want to tell that the account is locked? */
1182                 if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
1183                         ppb->pErr = PP_noError;
1184                 }
1185                 ctrl = create_passcontrol( op, warn, ngut, ppb->pErr );
1186                 ppb->oldctrls = add_passcontrol( op, rs, ctrl );
1187                 op->o_callback->sc_cleanup = ppolicy_ctrls_cleanup;
1188         }
1189         op->o_bd->bd_info = bi;
1190         return SLAP_CB_CONTINUE;
1191 }
1192
1193 static int
1194 ppolicy_bind( Operation *op, SlapReply *rs )
1195 {
1196         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1197
1198         /* Reset lockout status on all Bind requests */
1199         if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1200                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1201                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1202         }
1203
1204         /* Root bypasses policy */
1205         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
1206                 Entry *e;
1207                 int rc;
1208                 ppbind *ppb;
1209                 slap_callback *cb;
1210
1211                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1212                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1213
1214                 if ( rc != LDAP_SUCCESS ) {
1215                         return SLAP_CB_CONTINUE;
1216                 }
1217
1218                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1219                         1, op->o_tmpmemctx );
1220                 ppb = (ppbind *)(cb+1);
1221                 ppb->on = on;
1222                 ppb->pErr = PP_noError;
1223                 ppb->set_restrict = 1;
1224
1225                 /* Setup a callback so we can munge the result */
1226
1227                 cb->sc_response = ppolicy_bind_response;
1228                 cb->sc_next = op->o_callback->sc_next;
1229                 cb->sc_private = ppb;
1230                 op->o_callback->sc_next = cb;
1231
1232                 /* Did we receive a password policy request control? */
1233                 if ( op->o_ctrlflag[ppolicy_cid] ) {
1234                         ppb->send_ctrl = 1;
1235                 }
1236
1237                 op->o_bd->bd_info = (BackendInfo *)on;
1238                 ppolicy_get( op, e, &ppb->pp );
1239
1240                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1241
1242                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1243                 be_entry_release_r( op, e );
1244
1245                 if ( rc ) {
1246                         ppb->pErr = PP_accountLocked;
1247                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
1248                         return rs->sr_err;
1249                 }
1250
1251         }
1252
1253         return SLAP_CB_CONTINUE;
1254 }
1255
1256 /* Reset the restricted info for the next session on this connection */
1257 static int
1258 ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
1259 {
1260         if ( !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
1261                 ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
1262                 BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
1263         }
1264         return SLAP_CB_CONTINUE;
1265 }
1266
1267 /* Check if this connection is restricted */
1268 static int
1269 ppolicy_restrict(
1270         Operation *op,
1271         SlapReply *rs )
1272 {
1273         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1274         int send_ctrl = 0;
1275
1276         /* Did we receive a password policy request control? */
1277         if ( op->o_ctrlflag[ppolicy_cid] ) {
1278                 send_ctrl = 1;
1279         }
1280
1281         if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1282                 LDAPControl **oldctrls;
1283                 /* if the current authcDN doesn't match the one we recorded,
1284                  * then an intervening Bind has succeeded and the restriction
1285                  * no longer applies. (ITS#4516)
1286                  */
1287                 if ( !dn_match( &op->o_conn->c_ndn,
1288                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1289                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1290                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1291                         return SLAP_CB_CONTINUE;
1292                 }
1293
1294                 Debug( LDAP_DEBUG_TRACE,
1295                         "connection restricted to password changing only\n", 0, 0, 0);
1296                 if ( send_ctrl ) {
1297                         LDAPControl *ctrl = NULL;
1298                         ctrl = create_passcontrol( op, -1, -1, PP_changeAfterReset );
1299                         oldctrls = add_passcontrol( op, rs, ctrl );
1300                 }
1301                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1302                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
1303                         "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
1304                 if ( send_ctrl ) {
1305                         ctrls_cleanup( op, rs, oldctrls );
1306                 }
1307                 return rs->sr_err;
1308         }
1309
1310         return SLAP_CB_CONTINUE;
1311 }
1312
1313 static int
1314 ppolicy_compare_response(
1315         Operation *op,
1316         SlapReply *rs )
1317 {
1318         /* map compare responses to bind responses */
1319         if ( rs->sr_err == LDAP_COMPARE_TRUE )
1320                 rs->sr_err = LDAP_SUCCESS;
1321         else if ( rs->sr_err == LDAP_COMPARE_FALSE )
1322                 rs->sr_err = LDAP_INVALID_CREDENTIALS;
1323
1324         ppolicy_bind_response( op, rs );
1325
1326         /* map back to compare */
1327         if ( rs->sr_err == LDAP_SUCCESS )
1328                 rs->sr_err = LDAP_COMPARE_TRUE;
1329         else if ( rs->sr_err == LDAP_INVALID_CREDENTIALS )
1330                 rs->sr_err = LDAP_COMPARE_FALSE;
1331
1332         return SLAP_CB_CONTINUE;
1333 }
1334
1335 static int
1336 ppolicy_compare(
1337         Operation *op,
1338         SlapReply *rs )
1339 {
1340         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1341
1342         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1343                 return rs->sr_err;
1344
1345         /* Did we receive a password policy request control?
1346          * Are we testing the userPassword?
1347          */
1348         if ( op->o_ctrlflag[ppolicy_cid] &&
1349                 op->orc_ava->aa_desc == slap_schema.si_ad_userPassword ) {
1350                 Entry *e;
1351                 int rc;
1352                 ppbind *ppb;
1353                 slap_callback *cb;
1354
1355                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1356                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1357
1358                 if ( rc != LDAP_SUCCESS ) {
1359                         return SLAP_CB_CONTINUE;
1360                 }
1361
1362                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1363                         1, op->o_tmpmemctx );
1364                 ppb = (ppbind *)(cb+1);
1365                 ppb->on = on;
1366                 ppb->pErr = PP_noError;
1367                 ppb->send_ctrl = 1;
1368                 /* failures here don't lockout the connection */
1369                 ppb->set_restrict = 0;
1370
1371                 /* Setup a callback so we can munge the result */
1372
1373                 cb->sc_response = ppolicy_compare_response;
1374                 cb->sc_next = op->o_callback->sc_next;
1375                 cb->sc_private = ppb;
1376                 op->o_callback->sc_next = cb;
1377
1378                 op->o_bd->bd_info = (BackendInfo *)on;
1379                 ppolicy_get( op, e, &ppb->pp );
1380
1381                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1382
1383                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1384                 be_entry_release_r( op, e );
1385
1386                 if ( rc ) {
1387                         ppb->pErr = PP_accountLocked;
1388                         send_ldap_error( op, rs, LDAP_COMPARE_FALSE, NULL );
1389                         return rs->sr_err;
1390                 }
1391         }
1392         return SLAP_CB_CONTINUE;
1393 }
1394
1395 static int
1396 ppolicy_add(
1397         Operation *op,
1398         SlapReply *rs )
1399 {
1400         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1401         pp_info *pi = on->on_bi.bi_private;
1402         PassPolicy pp;
1403         Attribute *pa;
1404         const char *txt;
1405
1406         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1407                 return rs->sr_err;
1408
1409         /* If this is a replica, assume the master checked everything */
1410         if ( be_shadow_update( op ))
1411                 return SLAP_CB_CONTINUE;
1412
1413         /* Check for password in entry */
1414         if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
1415                 slap_schema.si_ad_userPassword )))
1416         {
1417                 assert( pa->a_vals != NULL );
1418                 assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
1419
1420                 if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
1421                         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
1422                         return rs->sr_err;
1423                 }
1424
1425                 /*
1426                  * new entry contains a password - if we're not the root user
1427                  * then we need to check that the password fits in with the
1428                  * security policy for the new entry.
1429                  */
1430                 ppolicy_get( op, op->ora_e, &pp );
1431                 if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
1432                         struct berval *bv = &(pa->a_vals[0]);
1433                         int rc, send_ctrl = 0;
1434                         LDAPPasswordPolicyError pErr = PP_noError;
1435                         char *txt;
1436
1437                         /* Did we receive a password policy request control? */
1438                         if ( op->o_ctrlflag[ppolicy_cid] ) {
1439                                 send_ctrl = 1;
1440                         }
1441                         rc = check_password_quality( bv, &pp, &pErr, op->ora_e, &txt );
1442                         if (rc != LDAP_SUCCESS) {
1443                                 LDAPControl **oldctrls = NULL;
1444                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1445                                 if ( send_ctrl ) {
1446                                         LDAPControl *ctrl = NULL;
1447                                         ctrl = create_passcontrol( op, -1, -1, pErr );
1448                                         oldctrls = add_passcontrol( op, rs, ctrl );
1449                                 }
1450                                 send_ldap_error( op, rs, rc, txt ? txt : "Password fails quality checking policy" );
1451                                 if ( txt ) {
1452                                         free( txt );
1453                                 }
1454                                 if ( send_ctrl ) {
1455                                         ctrls_cleanup( op, rs, oldctrls );
1456                                 }
1457                                 return rs->sr_err;
1458                         }
1459                 }
1460                         /*
1461                          * A controversial bit. We hash cleartext
1462                          * passwords provided via add and modify operations
1463                          * You're not really supposed to do this, since
1464                          * the X.500 model says "store attributes" as they
1465                          * get provided. By default, this is what we do
1466                          *
1467                          * But if the hash_passwords flag is set, we hash
1468                          * any cleartext password attribute values via the
1469                          * default password hashing scheme.
1470                          */
1471                 if ((pi->hash_passwords) &&
1472                         (password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
1473                         struct berval hpw;
1474
1475                         slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
1476                         if (hpw.bv_val == NULL) {
1477                                 /*
1478                                  * hashing didn't work. Emit an error.
1479                                  */
1480                                 rs->sr_err = LDAP_OTHER;
1481                                 rs->sr_text = txt;
1482                                 send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
1483                                 return rs->sr_err;
1484                         }
1485
1486                         memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
1487                         ber_memfree( pa->a_vals[0].bv_val );
1488                         pa->a_vals[0].bv_val = hpw.bv_val;
1489                         pa->a_vals[0].bv_len = hpw.bv_len;
1490                 }
1491
1492                 /* If password aging is in effect, set the pwdChangedTime */
1493                 if ( pp.pwdMaxAge || pp.pwdMinAge ) {
1494                         struct berval timestamp;
1495                         char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1496                         time_t now = slap_get_time();
1497
1498                         timestamp.bv_val = timebuf;
1499                         timestamp.bv_len = sizeof(timebuf);
1500                         slap_timestamp( &now, &timestamp );
1501
1502                         attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
1503                 }
1504         }
1505         return SLAP_CB_CONTINUE;
1506 }
1507
1508 static int
1509 ppolicy_mod_cb( Operation *op, SlapReply *rs )
1510 {
1511         slap_callback *sc = op->o_callback;
1512         op->o_callback = sc->sc_next;
1513         if ( rs->sr_err == LDAP_SUCCESS ) {
1514                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1515                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1516         }
1517         op->o_tmpfree( sc, op->o_tmpmemctx );
1518         return SLAP_CB_CONTINUE;
1519 }
1520
1521 static int
1522 ppolicy_modify( Operation *op, SlapReply *rs )
1523 {
1524         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1525         pp_info                 *pi = on->on_bi.bi_private;
1526         int                     i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
1527                                 hsize = 0;
1528         PassPolicy              pp;
1529         Modifications           *mods = NULL, *modtail = NULL,
1530                                 *ml, *delmod, *addmod;
1531         Attribute               *pa, *ha, at;
1532         const char              *txt;
1533         pw_hist                 *tl = NULL, *p;
1534         int                     zapReset, send_ctrl = 0, free_txt = 0;
1535         Entry                   *e;
1536         struct berval           newpw = BER_BVNULL, oldpw = BER_BVNULL,
1537                                 *bv, cr[2];
1538         LDAPPasswordPolicyError pErr = PP_noError;
1539         LDAPControl             *ctrl = NULL;
1540         LDAPControl             **oldctrls = NULL;
1541         int                     is_pwdexop = 0;
1542
1543         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1544         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1545         op->o_bd->bd_info = (BackendInfo *)on;
1546
1547         if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
1548
1549         /* If this is a replica, we may need to tweak some of the
1550          * master's modifications. Otherwise, just pass it through.
1551          */
1552         if ( be_shadow_update( op )) {
1553                 Modifications **prev;
1554                 int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
1555                 Attribute *a_grace, *a_lock, *a_fail;
1556
1557                 a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
1558                 a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
1559                 a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
1560
1561                 for( prev = &op->orm_modlist, ml = *prev; ml; ml = *prev ) {
1562
1563                         if ( ml->sml_desc == slap_schema.si_ad_userPassword )
1564                                 got_pw = 1;
1565
1566                         /* If we're deleting an attr that didn't exist,
1567                          * drop this delete op
1568                          */
1569                         if ( ml->sml_op == LDAP_MOD_DELETE ) {
1570                                 int drop = 0;
1571
1572                                 if ( ml->sml_desc == ad_pwdGraceUseTime ) {
1573                                         got_del_grace = 1;
1574                                         if ( !a_grace )
1575                                                 drop = 1;
1576                                 } else
1577                                 if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
1578                                         got_del_lock = 1;
1579                                         if ( !a_lock )
1580                                                 drop = 1;
1581                                 } else
1582                                 if ( ml->sml_desc == ad_pwdFailureTime ) {
1583                                         got_del_fail = 1;
1584                                         if ( !a_fail )
1585                                                 drop = 1;
1586                                 }
1587                                 if ( drop ) {
1588                                         *prev = ml->sml_next;
1589                                         ml->sml_next = NULL;
1590                                         slap_mods_free( ml, 1 );
1591                                         continue;
1592                                 }
1593                         }
1594                         prev = &ml->sml_next;
1595                 }
1596
1597                 /* If we're resetting the password, make sure grace, accountlock,
1598                  * and failure also get removed.
1599                  */
1600                 if ( got_pw ) {
1601                         if ( a_grace && !got_del_grace ) {
1602                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1603                                 ml->sml_op = LDAP_MOD_DELETE;
1604                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1605                                 ml->sml_type.bv_val = NULL;
1606                                 ml->sml_desc = ad_pwdGraceUseTime;
1607                                 ml->sml_numvals = 0;
1608                                 ml->sml_values = NULL;
1609                                 ml->sml_nvalues = NULL;
1610                                 ml->sml_next = NULL;
1611                                 *prev = ml;
1612                                 prev = &ml->sml_next;
1613                         }
1614                         if ( a_lock && !got_del_lock ) {
1615                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1616                                 ml->sml_op = LDAP_MOD_DELETE;
1617                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1618                                 ml->sml_type.bv_val = NULL;
1619                                 ml->sml_desc = ad_pwdAccountLockedTime;
1620                                 ml->sml_numvals = 0;
1621                                 ml->sml_values = NULL;
1622                                 ml->sml_nvalues = NULL;
1623                                 ml->sml_next = NULL;
1624                                 *prev = ml;
1625                         }
1626                         if ( a_fail && !got_del_fail ) {
1627                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1628                                 ml->sml_op = LDAP_MOD_DELETE;
1629                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1630                                 ml->sml_type.bv_val = NULL;
1631                                 ml->sml_desc = ad_pwdFailureTime;
1632                                 ml->sml_numvals = 0;
1633                                 ml->sml_values = NULL;
1634                                 ml->sml_nvalues = NULL;
1635                                 ml->sml_next = NULL;
1636                                 *prev = ml;
1637                         }
1638                 }
1639                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1640                 be_entry_release_r( op, e );
1641                 return SLAP_CB_CONTINUE;
1642         }
1643
1644         /* Did we receive a password policy request control? */
1645         if ( op->o_ctrlflag[ppolicy_cid] ) {
1646                 send_ctrl = 1;
1647         }
1648
1649         /* See if this is a pwdModify exop. If so, we can
1650          * access the plaintext passwords from that request.
1651          */
1652         {
1653                 slap_callback *sc;
1654
1655                 for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
1656                         if ( sc->sc_response == slap_null_cb &&
1657                                 sc->sc_private ) {
1658                                 req_pwdexop_s *qpw = sc->sc_private;
1659                                 newpw = qpw->rs_new;
1660                                 oldpw = qpw->rs_old;
1661                                 is_pwdexop = 1;
1662                                 break;
1663                         }
1664                 }
1665         }
1666
1667         ppolicy_get( op, e, &pp );
1668
1669         for ( ml = op->orm_modlist,
1670                         pwmod = 0, mod_pw_only = 1,
1671                         deladd = 0, delmod = NULL,
1672                         addmod = NULL,
1673                         zapReset = 1;
1674                 ml != NULL; modtail = ml, ml = ml->sml_next )
1675         {
1676                 if ( ml->sml_desc == pp.ad ) {
1677                         pwmod = 1;
1678                         pwmop = ml->sml_op;
1679                         if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
1680                                 (ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
1681                         {
1682                                 deladd = 1;
1683                                 delmod = ml;
1684                         }
1685
1686                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1687                                 (ml->sml_op == LDAP_MOD_REPLACE))
1688                         {
1689                                 if ( ml->sml_values && !BER_BVISNULL( &ml->sml_values[0] )) {
1690                                         if ( deladd == 1 )
1691                                                 deladd = 2;
1692
1693                                         /* FIXME: there's no easy way to ensure
1694                                          * that add does not cause multiple
1695                                          * userPassword values; one way (that
1696                                          * would be consistent with the single
1697                                          * password constraint) would be to turn
1698                                          * add into replace); another would be
1699                                          * to disallow add.
1700                                          *
1701                                          * Let's check at least that a single value
1702                                          * is being added
1703                                          */
1704                                         if ( addmod || !BER_BVISNULL( &ml->sml_values[ 1 ] ) ) {
1705                                                 rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1706                                                 rs->sr_text = "Password policy only allows one password value";
1707                                                 goto return_results;
1708                                         }
1709
1710                                         addmod = ml;
1711                                 } else {
1712                                         /* replace can have no values, add cannot */
1713                                         assert( ml->sml_op == LDAP_MOD_REPLACE );
1714                                 }
1715                         }
1716
1717                 } else if ( !(ml->sml_flags & SLAP_MOD_INTERNAL) && !is_at_operational( ml->sml_desc->ad_type ) ) {
1718                         mod_pw_only = 0;
1719                         /* modifying something other than password */
1720                 }
1721
1722                 /*
1723                  * If there is a request to explicitly add a pwdReset
1724                  * attribute, then we suppress the normal behaviour on
1725                  * password change, which is to remove the pwdReset
1726                  * attribute.
1727                  *
1728                  * This enables an administrator to assign a new password
1729                  * and place a "must reset" flag on the entry, which will
1730                  * stay until the user explicitly changes his/her password.
1731                  */
1732                 if (ml->sml_desc == ad_pwdReset ) {
1733                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1734                                 (ml->sml_op == LDAP_MOD_REPLACE))
1735                                 zapReset = 0;
1736                 }
1737         }
1738
1739         if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
1740                 if ( dn_match( &op->o_conn->c_ndn,
1741                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1742                         Debug( LDAP_DEBUG_TRACE,
1743                                 "connection restricted to password changing only\n", 0, 0, 0 );
1744                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1745                         rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
1746                         pErr = PP_changeAfterReset;
1747                         goto return_results;
1748                 } else {
1749                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1750                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1751                 }
1752         }
1753
1754         /*
1755          * if we have a "safe password modify policy", then we need to check if we're doing
1756          * a delete (with the old password), followed by an add (with the new password).
1757          *
1758          * If we got just a delete with nothing else, just let it go. We also skip all the checks if
1759          * the root user is bound. Root can do anything, including avoid the policies.
1760          */
1761
1762         if (!pwmod) goto do_modify;
1763
1764         /*
1765          * Build the password history list in ascending time order
1766          * We need this, even if the user is root, in order to maintain
1767          * the pwdHistory operational attributes properly.
1768          */
1769         if (addmod && pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
1770                 struct berval oldpw;
1771                 time_t oldtime;
1772
1773                 for(i=0; ha->a_nvals[i].bv_val; i++) {
1774                         rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
1775                                 &oldtime, &oldpw );
1776
1777                         if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
1778
1779                         if (oldpw.bv_val) {
1780                                 add_to_pwd_history( &tl, oldtime, &oldpw,
1781                                         &(ha->a_nvals[i]) );
1782                                 oldpw.bv_val = NULL;
1783                                 oldpw.bv_len = 0;
1784                         }
1785                 }
1786                 for(p=tl; p; p=p->next, hsize++); /* count history size */
1787         }
1788
1789         if (be_isroot( op )) goto do_modify;
1790
1791         if (!pp.pwdAllowUserChange) {
1792                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1793                 rs->sr_text = "User alteration of password is not allowed";
1794                 pErr = PP_passwordModNotAllowed;
1795                 goto return_results;
1796         }
1797
1798         /* Just deleting? */
1799         if (!addmod) {
1800                 /* skip everything else */
1801                 pwmod = 0;
1802                 goto do_modify;
1803         }
1804
1805         /* This is a pwdModify exop that provided the old pw.
1806          * We need to create a Delete mod for this old pw and
1807          * let the matching value get found later
1808          */
1809         if (pp.pwdSafeModify && oldpw.bv_val ) {
1810                 ml = (Modifications *)ch_calloc( sizeof( Modifications ), 1 );
1811                 ml->sml_op = LDAP_MOD_DELETE;
1812                 ml->sml_flags = SLAP_MOD_INTERNAL;
1813                 ml->sml_desc = pp.ad;
1814                 ml->sml_type = pp.ad->ad_cname;
1815                 ml->sml_numvals = 1;
1816                 ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1817                 ber_dupbv( &ml->sml_values[0], &oldpw );
1818                 BER_BVZERO( &ml->sml_values[1] );
1819                 ml->sml_next = op->orm_modlist;
1820                 op->orm_modlist = ml;
1821                 delmod = ml;
1822                 deladd = 2;
1823         }
1824
1825         if (pp.pwdSafeModify && deladd != 2) {
1826                 Debug( LDAP_DEBUG_TRACE,
1827                         "change password must use DELETE followed by ADD/REPLACE\n",
1828                         0, 0, 0 );
1829                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1830                 rs->sr_text = "Must supply old password to be changed as well as new one";
1831                 pErr = PP_mustSupplyOldPassword;
1832                 goto return_results;
1833         }
1834
1835         /* Check age, but only if pwdReset is not TRUE */
1836         pa = attr_find( e->e_attrs, ad_pwdReset );
1837         if ((!pa || !bvmatch( &pa->a_nvals[0], &slap_true_bv )) &&
1838                 pp.pwdMinAge > 0) {
1839                 time_t pwtime = (time_t)-1, now;
1840                 int age;
1841
1842                 if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1843                         pwtime = parse_time( pa->a_nvals[0].bv_val );
1844                 now = slap_get_time();
1845                 age = (int)(now - pwtime);
1846                 if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
1847                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1848                         rs->sr_text = "Password is too young to change";
1849                         pErr = PP_passwordTooYoung;
1850                         goto return_results;
1851                 }
1852         }
1853
1854         /* pa is used in password history check below, be sure it's set */
1855         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
1856                 /*
1857                  * we have a password to check
1858                  */
1859                 bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
1860                 /* FIXME: no access checking? */
1861                 rc = slap_passwd_check( op, NULL, pa, bv, &txt );
1862                 if (rc != LDAP_SUCCESS) {
1863                         Debug( LDAP_DEBUG_TRACE,
1864                                 "old password check failed: %s\n", txt, 0, 0 );
1865
1866                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1867                         rs->sr_text = "Must supply correct old password to change to new one";
1868                         pErr = PP_mustSupplyOldPassword;
1869                         goto return_results;
1870
1871                 } else {
1872                         int i;
1873
1874                         /*
1875                          * replace the delete value with the (possibly hashed)
1876                          * value which is currently in the password.
1877                          */
1878                         for ( i = 0; !BER_BVISNULL( &delmod->sml_values[i] ); i++ ) {
1879                                 free( delmod->sml_values[i].bv_val );
1880                                 BER_BVZERO( &delmod->sml_values[i] );
1881                         }
1882                         free( delmod->sml_values );
1883                         delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
1884                         BER_BVZERO( &delmod->sml_values[1] );
1885                         ber_dupbv( &(delmod->sml_values[0]),  &(pa->a_nvals[0]) );
1886                 }
1887         }
1888
1889         bv = newpw.bv_val ? &newpw : &addmod->sml_values[0];
1890         if (pp.pwdCheckQuality > 0) {
1891
1892                 rc = check_password_quality( bv, &pp, &pErr, e, (char **)&txt );
1893                 if (rc != LDAP_SUCCESS) {
1894                         rs->sr_err = rc;
1895                         if ( txt ) {
1896                                 rs->sr_text = txt;
1897                                 free_txt = 1;
1898                         } else {
1899                                 rs->sr_text = "Password fails quality checking policy";
1900                         }
1901                         goto return_results;
1902                 }
1903         }
1904
1905         /* If pwdInHistory is zero, passwords may be reused */
1906         if (pa && pp.pwdInHistory > 0) {
1907                 /*
1908                  * Last check - the password history.
1909                  */
1910                 /* FIXME: no access checking? */
1911                 if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
1912                         /*
1913                          * This is bad - it means that the user is attempting
1914                          * to set the password to the same as the old one.
1915                          */
1916                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1917                         rs->sr_text = "Password is not being changed from existing value";
1918                         pErr = PP_passwordInHistory;
1919                         goto return_results;
1920                 }
1921
1922                 /*
1923                  * Iterate through the password history, and fail on any
1924                  * password matches.
1925                  */
1926                 at = *pa;
1927                 at.a_vals = cr;
1928                 cr[1].bv_val = NULL;
1929                 for(p=tl; p; p=p->next) {
1930                         cr[0] = p->pw;
1931                         /* FIXME: no access checking? */
1932                         rc = slap_passwd_check( op, NULL, &at, bv, &txt );
1933
1934                         if (rc != LDAP_SUCCESS) continue;
1935
1936                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1937                         rs->sr_text = "Password is in history of old passwords";
1938                         pErr = PP_passwordInHistory;
1939                         goto return_results;
1940                 }
1941         }
1942
1943 do_modify:
1944         if (pwmod) {
1945                 struct berval timestamp;
1946                 char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1947                 time_t now = slap_get_time();
1948
1949                 /* If the conn is restricted, set a callback to clear it
1950                  * if the pwmod succeeds
1951                  */
1952                 if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1953                         slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
1954                                 op->o_tmpmemctx );
1955                         sc->sc_next = op->o_callback;
1956                         /* Must use sc_response to insure we reset on success, before
1957                          * the client sees the response. Must use sc_cleanup to insure
1958                          * that it gets cleaned up if sc_response is not called.
1959                          */
1960                         sc->sc_response = ppolicy_mod_cb;
1961                         sc->sc_cleanup = ppolicy_mod_cb;
1962                         op->o_callback = sc;
1963                 }
1964
1965                 /*
1966                  * keep the necessary pwd.. operational attributes
1967                  * up to date.
1968                  */
1969
1970                 timestamp.bv_val = timebuf;
1971                 timestamp.bv_len = sizeof(timebuf);
1972                 slap_timestamp( &now, &timestamp );
1973
1974                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1975                 mods->sml_desc = ad_pwdChangedTime;
1976                 if (pwmop != LDAP_MOD_DELETE) {
1977                         mods->sml_op = LDAP_MOD_REPLACE;
1978                         mods->sml_numvals = 1;
1979                         mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1980                         ber_dupbv( &mods->sml_values[0], &timestamp );
1981                         BER_BVZERO( &mods->sml_values[1] );
1982                         assert( !BER_BVISNULL( &mods->sml_values[0] ) );
1983
1984                 } else {
1985                         mods->sml_op = LDAP_MOD_DELETE;
1986                 }
1987                 mods->sml_flags = SLAP_MOD_INTERNAL;
1988                 mods->sml_next = NULL;
1989                 modtail->sml_next = mods;
1990                 modtail = mods;
1991
1992                 if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
1993                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
1994                         mods->sml_op = LDAP_MOD_DELETE;
1995                         mods->sml_desc = ad_pwdGraceUseTime;
1996                         mods->sml_flags = SLAP_MOD_INTERNAL;
1997                         mods->sml_next = NULL;
1998                         modtail->sml_next = mods;
1999                         modtail = mods;
2000                 }
2001
2002                 if (attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
2003                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2004                         mods->sml_op = LDAP_MOD_DELETE;
2005                         mods->sml_desc = ad_pwdAccountLockedTime;
2006                         mods->sml_flags = SLAP_MOD_INTERNAL;
2007                         mods->sml_next = NULL;
2008                         modtail->sml_next = mods;
2009                         modtail = mods;
2010                 }
2011
2012                 if (attr_find(e->e_attrs, ad_pwdFailureTime )) {
2013                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2014                         mods->sml_op = LDAP_MOD_DELETE;
2015                         mods->sml_desc = ad_pwdFailureTime;
2016                         mods->sml_flags = SLAP_MOD_INTERNAL;
2017                         mods->sml_next = NULL;
2018                         modtail->sml_next = mods;
2019                         modtail = mods;
2020                 }
2021
2022                 /* Delete the pwdReset attribute, since it's being reset */
2023                 if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
2024                         mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2025                         mods->sml_op = LDAP_MOD_DELETE;
2026                         mods->sml_desc = ad_pwdReset;
2027                         mods->sml_flags = SLAP_MOD_INTERNAL;
2028                         mods->sml_next = NULL;
2029                         modtail->sml_next = mods;
2030                         modtail = mods;
2031                 }
2032
2033                 if (pp.pwdInHistory > 0) {
2034                         if (hsize >= pp.pwdInHistory) {
2035                                 /*
2036                                  * We use the >= operator, since we are going to add
2037                                  * the existing password attribute value into the
2038                                  * history - thus the cardinality of history values is
2039                                  * about to rise by one.
2040                                  *
2041                                  * If this would push it over the limit of history
2042                                  * values (remembering - the password policy could have
2043                                  * changed since the password was last altered), we must
2044                                  * delete at least 1 value from the pwdHistory list.
2045                                  *
2046                                  * In fact, we delete '(#pwdHistory attrs - max pwd
2047                                  * history length) + 1' values, starting with the oldest.
2048                                  * This is easily evaluated, since the linked list is
2049                                  * created in ascending time order.
2050                                  */
2051                                 mods = (Modifications *) ch_calloc( sizeof( Modifications ), 1 );
2052                                 mods->sml_op = LDAP_MOD_DELETE;
2053                                 mods->sml_flags = SLAP_MOD_INTERNAL;
2054                                 mods->sml_desc = ad_pwdHistory;
2055                                 mods->sml_numvals = hsize - pp.pwdInHistory + 1;
2056                                 mods->sml_values = ch_calloc( sizeof( struct berval ),
2057                                         hsize - pp.pwdInHistory + 2 );
2058                                 BER_BVZERO( &mods->sml_values[ hsize - pp.pwdInHistory + 1 ] );
2059                                 for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
2060                                         BER_BVZERO( &mods->sml_values[i] );
2061                                         ber_dupbv( &(mods->sml_values[i]), &p->bv );
2062                                 }
2063                                 mods->sml_next = NULL;
2064                                 modtail->sml_next = mods;
2065                                 modtail = mods;
2066                         }
2067                         free_pwd_history_list( &tl );
2068
2069                         /*
2070                          * Now add the existing password into the history list.
2071                          * This will be executed even if the operation is to delete
2072                          * the password entirely.
2073                          *
2074                          * This isn't in the spec explicitly, but it seems to make
2075                          * sense that the password history list is the list of all
2076                          * previous passwords - even if they were deleted. Thus, if
2077                          * someone tries to add a historical password at some future
2078                          * point, it will fail.
2079                          */
2080                         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
2081                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
2082                                 mods->sml_op = LDAP_MOD_ADD;
2083                                 mods->sml_flags = SLAP_MOD_INTERNAL;
2084                                 mods->sml_type.bv_val = NULL;
2085                                 mods->sml_desc = ad_pwdHistory;
2086                                 mods->sml_nvalues = NULL;
2087                                 mods->sml_numvals = 1;
2088                                 mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
2089                                 mods->sml_values[ 1 ].bv_val = NULL;
2090                                 mods->sml_values[ 1 ].bv_len = 0;
2091                                 make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
2092                                 mods->sml_next = NULL;
2093                                 modtail->sml_next = mods;
2094                                 modtail = mods;
2095
2096                         } else {
2097                                 Debug( LDAP_DEBUG_TRACE,
2098                                 "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
2099                         }
2100                 }
2101
2102                 /*
2103                  * Controversial bit here. If the new password isn't hashed
2104                  * (ie, is cleartext), we probably should hash it according
2105                  * to the default hash. The reason for this is that we want
2106                  * to use the policy if possible, but if we hash the password
2107                  * before, then we're going to run into trouble when it
2108                  * comes time to check the password.
2109                  *
2110                  * Now, the right thing to do is to use the extended password
2111                  * modify operation, but not all software can do this,
2112                  * therefore it makes sense to hash the new password, now
2113                  * we know it passes the policy requirements.
2114                  *
2115                  * Of course, if the password is already hashed, then we
2116                  * leave it alone.
2117                  */
2118
2119                 if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
2120                         (password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS))
2121                 {
2122                         struct berval hpw, bv;
2123
2124                         slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
2125                         if (hpw.bv_val == NULL) {
2126                                         /*
2127                                          * hashing didn't work. Emit an error.
2128                                          */
2129                                 rs->sr_err = LDAP_OTHER;
2130                                 rs->sr_text = txt;
2131                                 goto return_results;
2132                         }
2133                         bv = addmod->sml_values[0];
2134                                 /* clear and discard the clear password */
2135                         memset(bv.bv_val, 0, bv.bv_len);
2136                         ber_memfree(bv.bv_val);
2137                         addmod->sml_values[0] = hpw;
2138                 }
2139         }
2140         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2141         be_entry_release_r( op, e );
2142         return SLAP_CB_CONTINUE;
2143
2144 return_results:
2145         free_pwd_history_list( &tl );
2146         op->o_bd->bd_info = (BackendInfo *)on->on_info;
2147         be_entry_release_r( op, e );
2148         if ( send_ctrl ) {
2149                 ctrl = create_passcontrol( op, -1, -1, pErr );
2150                 oldctrls = add_passcontrol( op, rs, ctrl );
2151         }
2152         send_ldap_result( op, rs );
2153         if ( free_txt ) {
2154                 free( (char *)txt );
2155                 rs->sr_text = NULL;
2156         }
2157         if ( send_ctrl ) {
2158                 if ( is_pwdexop ) {
2159                         if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED ) {
2160                                 op->o_tmpfree( oldctrls, op->o_tmpmemctx );
2161                         }
2162                         oldctrls = NULL;
2163                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
2164
2165                 } else {
2166                         ctrls_cleanup( op, rs, oldctrls );
2167                 }
2168         }
2169         return rs->sr_err;
2170 }
2171
2172 static int
2173 ppolicy_parseCtrl(
2174         Operation *op,
2175         SlapReply *rs,
2176         LDAPControl *ctrl )
2177 {
2178         if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
2179                 rs->sr_text = "passwordPolicyRequest control value not absent";
2180                 return LDAP_PROTOCOL_ERROR;
2181         }
2182         op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
2183                 ? SLAP_CONTROL_CRITICAL
2184                 : SLAP_CONTROL_NONCRITICAL;
2185
2186         return LDAP_SUCCESS;
2187 }
2188
2189 static int
2190 attrPretty(
2191         Syntax *syntax,
2192         struct berval *val,
2193         struct berval *out,
2194         void *ctx )
2195 {
2196         AttributeDescription *ad = NULL;
2197         const char *err;
2198         int code;
2199
2200         code = slap_bv2ad( val, &ad, &err );
2201         if ( !code ) {
2202                 ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
2203         }
2204         return code;
2205 }
2206
2207 static int
2208 attrNormalize(
2209         slap_mask_t use,
2210         Syntax *syntax,
2211         MatchingRule *mr,
2212         struct berval *val,
2213         struct berval *out,
2214         void *ctx )
2215 {
2216         AttributeDescription *ad = NULL;
2217         const char *err;
2218         int code;
2219
2220         code = slap_bv2ad( val, &ad, &err );
2221         if ( !code ) {
2222                 ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
2223         }
2224         return code;
2225 }
2226
2227 static int
2228 ppolicy_db_init(
2229         BackendDB *be,
2230         ConfigReply *cr
2231 )
2232 {
2233         slap_overinst *on = (slap_overinst *) be->bd_info;
2234
2235         if ( SLAP_ISGLOBALOVERLAY( be ) ) {
2236                 /* do not allow slapo-ppolicy to be global by now (ITS#5858) */
2237                 if ( cr ){
2238                         snprintf( cr->msg, sizeof(cr->msg),
2239                                 "slapo-ppolicy cannot be global" );
2240                         Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
2241                 }
2242                 return 1;
2243         }
2244
2245         /* Has User Schema been initialized yet? */
2246         if ( !pwd_UsSchema[0].ad[0] ) {
2247                 const char *err;
2248                 int i, code;
2249
2250                 for (i=0; pwd_UsSchema[i].def; i++) {
2251                         code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
2252                         if ( code ) {
2253                                 if ( cr ){
2254                                         snprintf( cr->msg, sizeof(cr->msg),
2255                                                 "User Schema load failed for attribute \"%s\". Error code %d: %s",
2256                                                 pwd_UsSchema[i].def, code, err );
2257                                         Debug( LDAP_DEBUG_ANY, "%s\n", cr->msg, 0, 0 );
2258                                 }
2259                                 return code;
2260                         }
2261                 }
2262                 {
2263                         Syntax *syn;
2264                         MatchingRule *mr;
2265
2266                         syn = ch_malloc( sizeof( Syntax ));
2267                         *syn = *ad_pwdAttribute->ad_type->sat_syntax;
2268                         syn->ssyn_pretty = attrPretty;
2269                         ad_pwdAttribute->ad_type->sat_syntax = syn;
2270
2271                         mr = ch_malloc( sizeof( MatchingRule ));
2272                         *mr = *ad_pwdAttribute->ad_type->sat_equality;
2273                         mr->smr_normalize = attrNormalize;
2274                         ad_pwdAttribute->ad_type->sat_equality = mr;
2275                 }
2276         }
2277
2278         on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
2279
2280         if ( dtblsize && !pwcons ) {
2281                 /* accommodate for c_conn_idx == -1 */
2282                 pwcons = ch_calloc( sizeof(pw_conn), dtblsize + 1 );
2283                 pwcons++;
2284         }
2285
2286         return 0;
2287 }
2288
2289 static int
2290 ppolicy_db_open(
2291         BackendDB *be,
2292         ConfigReply *cr
2293 )
2294 {
2295         ov_count++;
2296         return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2297 }
2298
2299 static int
2300 ppolicy_close(
2301         BackendDB *be,
2302         ConfigReply *cr
2303 )
2304 {
2305         slap_overinst *on = (slap_overinst *) be->bd_info;
2306         pp_info *pi = on->on_bi.bi_private;
2307
2308 #ifdef SLAP_CONFIG_DELETE
2309         overlay_unregister_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2310 #endif /* SLAP_CONFIG_DELETE */
2311
2312         /* Perhaps backover should provide bi_destroy hooks... */
2313         ov_count--;
2314         if ( ov_count <=0 && pwcons ) {
2315                 pwcons--;
2316                 free( pwcons );
2317                 pwcons = NULL;
2318         }
2319         free( pi->def_policy.bv_val );
2320         free( pi );
2321
2322         return 0;
2323 }
2324
2325 static char *extops[] = {
2326         LDAP_EXOP_MODIFY_PASSWD,
2327         NULL
2328 };
2329
2330 static slap_overinst ppolicy;
2331
2332 int ppolicy_initialize()
2333 {
2334         int i, code;
2335
2336         for (i=0; pwd_OpSchema[i].def; i++) {
2337                 code = register_at( pwd_OpSchema[i].def, pwd_OpSchema[i].ad, 0 );
2338                 if ( code ) {
2339                         Debug( LDAP_DEBUG_ANY,
2340                                 "ppolicy_initialize: register_at failed\n", 0, 0, 0 );
2341                         return code;
2342                 }
2343                 /* Allow Manager to set these as needed */
2344                 if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
2345                         (*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
2346                                 SLAP_AT_MANAGEABLE;
2347                 }
2348         }
2349
2350         code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
2351                 SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
2352                 ppolicy_parseCtrl, &ppolicy_cid );
2353         if ( code != LDAP_SUCCESS ) {
2354                 Debug( LDAP_DEBUG_ANY, "Failed to register control %d\n", code, 0, 0 );
2355                 return code;
2356         }
2357
2358         ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
2359
2360         ppolicy.on_bi.bi_type = "ppolicy";
2361         ppolicy.on_bi.bi_db_init = ppolicy_db_init;
2362         ppolicy.on_bi.bi_db_open = ppolicy_db_open;
2363         ppolicy.on_bi.bi_db_close = ppolicy_close;
2364
2365         ppolicy.on_bi.bi_op_add = ppolicy_add;
2366         ppolicy.on_bi.bi_op_bind = ppolicy_bind;
2367         ppolicy.on_bi.bi_op_compare = ppolicy_compare;
2368         ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
2369         ppolicy.on_bi.bi_op_modify = ppolicy_modify;
2370         ppolicy.on_bi.bi_op_search = ppolicy_restrict;
2371         ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
2372
2373         ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
2374         code = config_register_schema( ppolicycfg, ppolicyocs );
2375         if ( code ) return code;
2376
2377         return overlay_register( &ppolicy );
2378 }
2379
2380 #if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
2381 int init_module(int argc, char *argv[]) {
2382         return ppolicy_initialize();
2383 }
2384 #endif
2385
2386 #endif  /* defined(SLAPD_OVER_PPOLICY) */