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 2004-2006 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 #if 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 } pp_info;
  54
  55 /* Our per-connection info - note, it is not per-instance, it is
  56  * used by all instances
  57  */
  58 typedef struct pw_conn {
  59         struct berval dn;       /* DN of restricted user */
  60 } pw_conn;
  61
  62 static pw_conn *pwcons;
  63 static int ppolicy_cid;
  64
  65 typedef struct pass_policy {
  66         AttributeDescription *ad; /* attribute to which the policy applies */
  67         int pwdMinAge; /* minimum time (seconds) until passwd can change */
  68         int pwdMaxAge; /* time in seconds until pwd will expire after change */
  69         int pwdInHistory; /* number of previous passwords kept */
  70         int pwdCheckQuality; /* 0 = don't check quality, 1 = check if possible,
  71                                                    2 = check mandatory; fail if not possible */
  72         int pwdMinLength; /* minimum number of chars in password */
  73         int pwdExpireWarning; /* number of seconds that warning controls are
  74                                                         sent before a password expires */
  75         int pwdGraceAuthNLimit; /* number of times you can log in with an
  76                                                         expired password */
  77         int pwdLockout; /* 0 = do not lockout passwords, 1 = lock them out */
  78         int pwdLockoutDuration; /* time in seconds a password is locked out for */
  79         int pwdMaxFailure; /* number of failed binds allowed before lockout */
  80         int pwdFailureCountInterval; /* number of seconds before failure
  81                                                                         counts are zeroed */
  82         int pwdMustChange; /* 0 = users can use admin set password
  83                                                         1 = users must change password after admin set */
  84         int pwdAllowUserChange; /* 0 = users cannot change their passwords
  85                                                                 1 = users can change them */
  86         int pwdSafeModify; /* 0 = old password doesn't need to come
  87                                                                 with password change request
  88                                                         1 = password change must supply existing pwd */
  89         char pwdCheckModule[MODULE_NAME_SZ]; /* name of module to dynamically
  90                                                                                     load to check password */
  91 } PassPolicy;
  92
  93 typedef struct pw_hist {
  94         time_t t;       /* timestamp of history entry */
  95         struct berval pw;       /* old password hash */
  96         struct berval bv;       /* text of entire entry */
  97         struct pw_hist *next;
  98 } pw_hist;
  99
 100 /* Operational attributes */
 101 static AttributeDescription *ad_pwdChangedTime, *ad_pwdAccountLockedTime,
 102         *ad_pwdFailureTime, *ad_pwdHistory, *ad_pwdGraceUseTime, *ad_pwdReset,
 103         *ad_pwdPolicySubentry;
 104
 105 static struct schema_info {
 106         char *def;
 107         AttributeDescription **ad;
 108 } pwd_OpSchema[] = {
 109         {       "( 1.3.6.1.4.1.42.2.27.8.1.16 "
 110                 "NAME ( 'pwdChangedTime' ) "
 111                 "DESC 'The time the password was last changed' "
 112                 "EQUALITY generalizedTimeMatch "
 113                 "ORDERING generalizedTimeOrderingMatch "
 114                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 115                 "SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )",
 116                 &ad_pwdChangedTime },
 117         {       "( 1.3.6.1.4.1.42.2.27.8.1.17 "
 118                 "NAME ( 'pwdAccountLockedTime' ) "
 119                 "DESC 'The time an user account was locked' "
 120                 "EQUALITY generalizedTimeMatch "
 121                 "ORDERING generalizedTimeOrderingMatch "
 122                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 123                 "SINGLE-VALUE "
 124 #if 0
 125                 /* Not until Relax control is released */
 126                 "NO-USER-MODIFICATION "
 127 #endif
 128                 "USAGE directoryOperation )",
 129                 &ad_pwdAccountLockedTime },
 130         {       "( 1.3.6.1.4.1.42.2.27.8.1.19 "
 131                 "NAME ( 'pwdFailureTime' ) "
 132                 "DESC 'The timestamps of the last consecutive authentication failures' "
 133                 "EQUALITY generalizedTimeMatch "
 134                 "ORDERING generalizedTimeOrderingMatch "
 135                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 136                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 137                 &ad_pwdFailureTime },
 138         {       "( 1.3.6.1.4.1.42.2.27.8.1.20 "
 139                 "NAME ( 'pwdHistory' ) "
 140                 "DESC 'The history of users passwords' "
 141                 "EQUALITY octetStringMatch "
 142                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.40 "
 143                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 144                 &ad_pwdHistory },
 145         {       "( 1.3.6.1.4.1.42.2.27.8.1.21 "
 146                 "NAME ( 'pwdGraceUseTime' ) "
 147                 "DESC 'The timestamps of the grace login once the password has expired' "
 148                 "EQUALITY generalizedTimeMatch "
 149                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
 150                 "NO-USER-MODIFICATION USAGE directoryOperation )",
 151                 &ad_pwdGraceUseTime },
 152         {       "( 1.3.6.1.4.1.42.2.27.8.1.22 "
 153                 "NAME ( 'pwdReset' ) "
 154                 "DESC 'The indication that the password has been reset' "
 155                 "EQUALITY booleanMatch "
 156                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.7 "
 157                 "SINGLE-VALUE USAGE directoryOperation )",
 158                 &ad_pwdReset },
 159         {       "( 1.3.6.1.4.1.42.2.27.8.1.23 "
 160                 "NAME ( 'pwdPolicySubentry' ) "
 161                 "DESC 'The pwdPolicy subentry in effect for this object' "
 162                 "EQUALITY distinguishedNameMatch "
 163                 "SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
 164                 "SINGLE-VALUE "
 165 #if 0
 166                 /* Not until Relax control is released */
 167                 "NO-USER-MODIFICATION "
 168 #endif
 169                 "USAGE directoryOperation )",
 170                 &ad_pwdPolicySubentry },
 171         { NULL, NULL }
 172 };
 173
 174 /* User attributes */
 175 static AttributeDescription *ad_pwdMinAge, *ad_pwdMaxAge, *ad_pwdInHistory,
 176         *ad_pwdCheckQuality, *ad_pwdMinLength, *ad_pwdMaxFailure,
 177         *ad_pwdGraceAuthNLimit, *ad_pwdExpireWarning, *ad_pwdLockoutDuration,
 178         *ad_pwdFailureCountInterval, *ad_pwdCheckModule, *ad_pwdLockout,
 179         *ad_pwdMustChange, *ad_pwdAllowUserChange, *ad_pwdSafeModify,
 180         *ad_pwdAttribute;
 181
 182 #define TAB(name)       { #name, &ad_##name }
 183
 184 static struct schema_info pwd_UsSchema[] = {
 185         TAB(pwdAttribute),
 186         TAB(pwdMinAge),
 187         TAB(pwdMaxAge),
 188         TAB(pwdInHistory),
 189         TAB(pwdCheckQuality),
 190         TAB(pwdMinLength),
 191         TAB(pwdMaxFailure),
 192         TAB(pwdGraceAuthNLimit),
 193         TAB(pwdExpireWarning),
 194         TAB(pwdLockout),
 195         TAB(pwdLockoutDuration),
 196         TAB(pwdFailureCountInterval),
 197         TAB(pwdCheckModule),
 198         TAB(pwdMustChange),
 199         TAB(pwdAllowUserChange),
 200         TAB(pwdSafeModify),
 201         { NULL, NULL }
 202 };
 203
 204 static ldap_pvt_thread_mutex_t chk_syntax_mutex;
 205
 206 enum {
 207         PPOLICY_DEFAULT = 1,
 208         PPOLICY_HASH_CLEARTEXT,
 209         PPOLICY_USE_LOCKOUT
 210 };
 211
 212 static ConfigDriver ppolicy_cf_default;
 213
 214 static ConfigTable ppolicycfg[] = {
 215         { "ppolicy_default", "policyDN", 2, 2, 0,
 216           ARG_DN|ARG_MAGIC|PPOLICY_DEFAULT, ppolicy_cf_default,
 217           "( OLcfgOvAt:12.1 NAME 'olcPPolicyDefault' "
 218           "DESC 'DN of a pwdPolicy object for uncustomized objects' "
 219           "SYNTAX OMsDN SINGLE-VALUE )", NULL, NULL },
 220         { "ppolicy_hash_cleartext", "on|off", 1, 2, 0,
 221           ARG_ON_OFF|ARG_OFFSET|PPOLICY_HASH_CLEARTEXT,
 222           (void *)offsetof(pp_info,hash_passwords),
 223           "( OLcfgOvAt:12.2 NAME 'olcPPolicyHashCleartext' "
 224           "DESC 'Hash passwords on add or modify' "
 225           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
 226         { "ppolicy_use_lockout", "on|off", 1, 2, 0,
 227           ARG_ON_OFF|ARG_OFFSET|PPOLICY_USE_LOCKOUT,
 228           (void *)offsetof(pp_info,use_lockout),
 229           "( OLcfgOvAt:12.3 NAME 'olcPPolicyUseLockout' "
 230           "DESC 'Warn clients with AccountLocked' "
 231           "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
 232         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 233 };
 234
 235 static ConfigOCs ppolicyocs[] = {
 236         { "( OLcfgOvOc:12.1 "
 237           "NAME 'olcPPolicyConfig' "
 238           "DESC 'Password Policy configuration' "
 239           "SUP olcOverlayConfig "
 240           "MAY ( olcPPolicyDefault $ olcPPolicyHashCleartext $ "
 241           "olcPPolicyUseLockout ) )",
 242           Cft_Overlay, ppolicycfg },
 243         { NULL, 0, NULL }
 244 };
 245
 246 static int
 247 ppolicy_cf_default( ConfigArgs *c )
 248 {
 249         slap_overinst *on = (slap_overinst *)c->bi;
 250         pp_info *pi = (pp_info *)on->on_bi.bi_private;
 251         int rc = ARG_BAD_CONF;
 252
 253         assert ( c->type == PPOLICY_DEFAULT );
 254         Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default\n", 0, 0, 0);
 255
 256         switch ( c->op ) {
 257         case SLAP_CONFIG_EMIT:
 258                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default emit\n", 0, 0, 0);
 259                 rc = 0;
 260                 if ( !BER_BVISEMPTY( &pi->def_policy )) {
 261                         rc = value_add_one( &c->rvalue_vals,
 262                                             &pi->def_policy );
 263                         if ( rc ) return rc;
 264                         rc = value_add_one( &c->rvalue_nvals,
 265                                             &pi->def_policy );
 266                 }
 267                 break;
 268         case LDAP_MOD_DELETE:
 269                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default delete\n", 0, 0, 0);
 270                 if ( pi->def_policy.bv_val ) {
 271                         ber_memfree ( pi->def_policy.bv_val );
 272                         pi->def_policy.bv_val = NULL;
 273                 }
 274                 pi->def_policy.bv_len = 0;
 275                 rc = 0;
 276                 break;
 277         case SLAP_CONFIG_ADD:
 278                 /* fallthrough to LDAP_MOD_ADD */
 279         case LDAP_MOD_ADD:
 280                 Debug(LDAP_DEBUG_TRACE, "==> ppolicy_cf_default add\n", 0, 0, 0);
 281                 if ( pi->def_policy.bv_val )
 282                         ber_memfree ( pi->def_policy.bv_val );
 283                 pi->def_policy = c->value_ndn;
 284                 rc = 0;
 285                 break;
 286         default:
 287                 abort ();
 288         }
 289
 290         return rc;
 291 }
 292
 293 static time_t
 294 parse_time( char *atm )
 295 {
 296         struct lutil_tm tm;
 297         struct lutil_timet tt;
 298         time_t ret = (time_t)-1;
 299
 300         if ( lutil_parsetime( atm, &tm ) == 0) {
 301                 lutil_tm2time( &tm, &tt );
 302                 ret = tt.tt_sec;
 303         }
 304         return ret;
 305 }
 306
 307 static int
 308 account_locked( Operation *op, Entry *e,
 309                 PassPolicy *pp, Modifications **mod )
 310 {
 311         Attribute       *la;
 312
 313         assert(mod != NULL);
 314
 315         if ( (la = attr_find( e->e_attrs, ad_pwdAccountLockedTime )) != NULL ) {
 316                 BerVarray vals = la->a_nvals;
 317
 318                 /*
 319                  * there is a lockout stamp - we now need to know if it's
 320                  * a valid one.
 321                  */
 322                 if (vals[0].bv_val != NULL) {
 323                         time_t then, now;
 324                         Modifications *m;
 325
 326                         if (!pp->pwdLockoutDuration)
 327                                 return 1;
 328
 329                         if ((then = parse_time( vals[0].bv_val )) == (time_t)0)
 330                                 return 1;
 331
 332                         now = slap_get_time();
 333
 334                         if (now < then + pp->pwdLockoutDuration)
 335                                 return 1;
 336
 337                         m = ch_calloc( sizeof(Modifications), 1 );
 338                         m->sml_op = LDAP_MOD_DELETE;
 339                         m->sml_flags = 0;
 340                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 341                         m->sml_desc = ad_pwdAccountLockedTime;
 342                         m->sml_next = *mod;
 343                         *mod = m;
 344                 }
 345         }
 346
 347         return 0;
 348 }
 349
 350 /* IMPLICIT TAGS, all context-specific */
 351 #define PPOLICY_WARNING 0xa0L   /* constructed + 0 */
 352 #define PPOLICY_ERROR 0x81L             /* primitive + 1 */
 353
 354 #define PPOLICY_EXPIRE 0x80L    /* primitive + 0 */
 355 #define PPOLICY_GRACE  0x81L    /* primitive + 1 */
 356
 357 static LDAPControl *
 358 create_passcontrol( int exptime, int grace, LDAPPasswordPolicyError err )
 359 {
 360         char berbuf[LBER_ELEMENT_SIZEOF], bb2[LBER_ELEMENT_SIZEOF];
 361         BerElement *ber = (BerElement *)berbuf, *b2 = (BerElement *)bb2;
 362         LDAPControl *c;
 363         struct berval bv;
 364
 365         if ((c = ch_calloc( sizeof( LDAPControl ), 1 )) == NULL) return NULL;
 366         c->ldctl_oid = LDAP_CONTROL_PASSWORDPOLICYRESPONSE;
 367         c->ldctl_iscritical = 0;
 368         c->ldctl_value.bv_val = NULL;
 369         c->ldctl_value.bv_len = 0;
 370
 371         ber_init2( ber, NULL, LBER_USE_DER );
 372         ber_printf(ber, "{" /*}*/ );
 373
 374         if (exptime >= 0) {
 375                 ber_init2( b2, NULL, LBER_USE_DER );
 376                 ber_printf( b2, "ti", PPOLICY_EXPIRE, exptime );
 377                 ber_flatten2( b2, &bv, 1 );
 378                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 379                 ch_free( bv.bv_val );
 380         } else if (grace > 0) {
 381                 ber_init2( b2, NULL, LBER_USE_DER );
 382                 ber_printf( b2, "ti", PPOLICY_GRACE, grace );
 383                 ber_flatten2( b2, &bv, 1 );
 384                 ber_printf( ber, "tO", PPOLICY_WARNING, &bv );
 385                 ch_free( bv.bv_val );
 386         }
 387
 388         if (err != PP_noError ) {
 389                 ber_printf( ber, "te", PPOLICY_ERROR, err );
 390         }
 391         ber_printf( ber, /*{*/ "N}" );
 392
 393         if (ber_flatten2( ber, &(c->ldctl_value), 1 ) == LBER_DEFAULT) {
 394                 ch_free(c);
 395                 (void)ber_free_buf(ber);
 396                 return NULL;
 397         }
 398         (void)ber_free_buf(ber);
 399         return c;
 400 }
 401
 402 static void
 403 ppolicy_get( Operation *op, Entry *e, PassPolicy *pp )
 404 {
 405         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 406         pp_info *pi = on->on_bi.bi_private;
 407         Attribute *a;
 408         BerVarray vals;
 409         int rc;
 410         Entry *pe = NULL;
 411 #if 0
 412         const char *text;
 413 #endif
 414
 415         memset( pp, 0, sizeof(PassPolicy) );
 416
 417         pp->ad = slap_schema.si_ad_userPassword;
 418
 419         /* Users can change their own password by default */
 420         pp->pwdAllowUserChange = 1;
 421
 422         if ((a = attr_find( e->e_attrs, ad_pwdPolicySubentry )) == NULL) {
 423                 /*
 424                  * entry has no password policy assigned - use default
 425                  */
 426                 vals = &pi->def_policy;
 427                 if ( !vals->bv_val )
 428                         goto defaultpol;
 429         } else {
 430                 vals = a->a_nvals;
 431                 if (vals[0].bv_val == NULL) {
 432                         Debug( LDAP_DEBUG_ANY,
 433                                 "ppolicy_get: NULL value for policySubEntry\n", 0, 0, 0 );
 434                         goto defaultpol;
 435                 }
 436         }
 437
 438         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 439         rc = be_entry_get_rw( op, vals, NULL, NULL, 0, &pe );
 440         op->o_bd->bd_info = (BackendInfo *)on;
 441
 442         if ( rc ) goto defaultpol;
 443
 444 #if 0   /* Only worry about userPassword for now */
 445         if ((a = attr_find( pe->e_attrs, ad_pwdAttribute )))
 446                 slap_bv2ad( &a->a_vals[0], &pp->ad, &text );
 447 #endif
 448
 449         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinAge ) )
 450                         && lutil_atoi( &pp->pwdMinAge, a->a_vals[0].bv_val ) != 0 )
 451                 goto defaultpol;
 452         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxAge ) )
 453                         && lutil_atoi( &pp->pwdMaxAge, a->a_vals[0].bv_val ) != 0 )
 454                 goto defaultpol;
 455         if ( ( a = attr_find( pe->e_attrs, ad_pwdInHistory ) )
 456                         && lutil_atoi( &pp->pwdInHistory, a->a_vals[0].bv_val ) != 0 )
 457                 goto defaultpol;
 458         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckQuality ) )
 459                         && lutil_atoi( &pp->pwdCheckQuality, a->a_vals[0].bv_val ) != 0 )
 460                 goto defaultpol;
 461         if ( ( a = attr_find( pe->e_attrs, ad_pwdMinLength ) )
 462                         && lutil_atoi( &pp->pwdMinLength, a->a_vals[0].bv_val ) != 0 )
 463                 goto defaultpol;
 464         if ( ( a = attr_find( pe->e_attrs, ad_pwdMaxFailure ) )
 465                         && lutil_atoi( &pp->pwdMaxFailure, a->a_vals[0].bv_val ) != 0 )
 466                 goto defaultpol;
 467         if ( ( a = attr_find( pe->e_attrs, ad_pwdGraceAuthNLimit ) )
 468                         && lutil_atoi( &pp->pwdGraceAuthNLimit, a->a_vals[0].bv_val ) != 0 )
 469                 goto defaultpol;
 470         if ( ( a = attr_find( pe->e_attrs, ad_pwdExpireWarning ) )
 471                         && lutil_atoi( &pp->pwdExpireWarning, a->a_vals[0].bv_val ) != 0 )
 472                 goto defaultpol;
 473         if ( ( a = attr_find( pe->e_attrs, ad_pwdFailureCountInterval ) )
 474                         && lutil_atoi( &pp->pwdFailureCountInterval, a->a_vals[0].bv_val ) != 0 )
 475                 goto defaultpol;
 476         if ( ( a = attr_find( pe->e_attrs, ad_pwdLockoutDuration ) )
 477                         && lutil_atoi( &pp->pwdLockoutDuration, a->a_vals[0].bv_val ) != 0 )
 478                 goto defaultpol;
 479
 480         if ( ( a = attr_find( pe->e_attrs, ad_pwdCheckModule ) ) ) {
 481                 strncpy( pp->pwdCheckModule, a->a_vals[0].bv_val,
 482                         sizeof(pp->pwdCheckModule) );
 483                 pp->pwdCheckModule[sizeof(pp->pwdCheckModule)-1] = '\0';
 484         }
 485
 486         if ((a = attr_find( pe->e_attrs, ad_pwdLockout )))
 487         pp->pwdLockout = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
 488         if ((a = attr_find( pe->e_attrs, ad_pwdMustChange )))
 489         pp->pwdMustChange = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
 490         if ((a = attr_find( pe->e_attrs, ad_pwdAllowUserChange )))
 491         pp->pwdAllowUserChange = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
 492         if ((a = attr_find( pe->e_attrs, ad_pwdSafeModify )))
 493         pp->pwdSafeModify = !strcmp( a->a_nvals[0].bv_val, "TRUE" );
 494
 495         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 496         be_entry_release_r( op, pe );
 497         op->o_bd->bd_info = (BackendInfo *)on;
 498
 499         return;
 500
 501 defaultpol:
 502         Debug( LDAP_DEBUG_TRACE,
 503                 "ppolicy_get: using default policy\n", 0, 0, 0 );
 504         return;
 505 }
 506
 507 static int
 508 password_scheme( struct berval *cred, struct berval *sch )
 509 {
 510         int e;
 511
 512         assert( cred != NULL );
 513
 514         if (sch) {
 515                 sch->bv_val = NULL;
 516                 sch->bv_len = 0;
 517         }
 518
 519         if ((cred->bv_len == 0) || (cred->bv_val == NULL) ||
 520                 (cred->bv_val[0] != '{')) return LDAP_OTHER;
 521
 522         for(e = 1; cred->bv_val[e] && cred->bv_val[e] != '}'; e++);
 523         if (cred->bv_val[e]) {
 524                 int rc;
 525                 rc = lutil_passwd_scheme( cred->bv_val );
 526                 if (rc) {
 527                         if (sch) {
 528                                 sch->bv_val = cred->bv_val;
 529                                 sch->bv_len = e;
 530                         }
 531                         return LDAP_SUCCESS;
 532                 }
 533         }
 534         return LDAP_OTHER;
 535 }
 536
 537 static int
 538 check_password_quality( struct berval *cred, PassPolicy *pp, LDAPPasswordPolicyError *err, Entry *e )
 539 {
 540         int rc = LDAP_SUCCESS, ok = LDAP_SUCCESS;
 541         char *ptr = cred->bv_val;
 542         struct berval sch;
 543
 544         assert( cred != NULL );
 545         assert( pp != NULL );
 546
 547         if ((cred->bv_len == 0) || (pp->pwdMinLength > cred->bv_len)) {
 548                 rc = LDAP_CONSTRAINT_VIOLATION;
 549                 if ( err ) *err = PP_passwordTooShort;
 550                 return rc;
 551         }
 552
 553         /*
 554          * We need to know if the password is already hashed - if so
 555          * what scheme is it. The reason being that the "hash" of
 556          * {cleartext} still allows us to check the password.
 557          */
 558         rc = password_scheme( cred, &sch );
 559         if (rc == LDAP_SUCCESS) {
 560                 if ((sch.bv_val) && (strncasecmp( sch.bv_val, "{cleartext}",
 561                         sch.bv_len ) == 0)) {
 562                         /*
 563                          * We can check the cleartext "hash"
 564                          */
 565                         ptr = cred->bv_val + sch.bv_len;
 566                 } else {
 567                         /* everything else, we can't check */
 568                         if (pp->pwdCheckQuality == 2) {
 569                                 rc = LDAP_CONSTRAINT_VIOLATION;
 570                                 if (err) *err = PP_insufficientPasswordQuality;
 571                                 return rc;
 572                         }
 573                         /*
 574                          * We can't check the syntax of the password, but it's not
 575                          * mandatory (according to the policy), so we return success.
 576                          */
 577
 578                         return LDAP_SUCCESS;
 579                 }
 580         }
 581
 582         rc = LDAP_SUCCESS;
 583
 584         if (pp->pwdCheckModule[0]) {
 585 #if SLAPD_MODULES
 586                 lt_dlhandle mod;
 587                 const char *err;
 588
 589                 if ((mod = lt_dlopen( pp->pwdCheckModule )) == NULL) {
 590                         err = lt_dlerror();
 591
 592                         Debug(LDAP_DEBUG_ANY,
 593                         "check_password_quality: lt_dlopen failed: (%s) %s.\n",
 594                                 pp->pwdCheckModule, err, 0 );
 595                         ok = LDAP_OTHER; /* internal error */
 596                 } else {
 597                         int (*prog)( char *passwd, char **text, Entry *ent );
 598
 599                         if ((prog = lt_dlsym( mod, "check_password" )) == NULL) {
 600                                 err = lt_dlerror();
 601
 602                                 Debug(LDAP_DEBUG_ANY,
 603                                         "check_password_quality: lt_dlsym failed: (%s) %s.\n",
 604                                         pp->pwdCheckModule, err, 0 );
 605                                 ok = LDAP_OTHER;
 606                         } else {
 607                                 char *txt = NULL;
 608
 609                                 ldap_pvt_thread_mutex_lock( &chk_syntax_mutex );
 610                                 ok = prog( cred->bv_val, &txt, e );
 611                                 ldap_pvt_thread_mutex_unlock( &chk_syntax_mutex );
 612                                 if (txt) {
 613                                         Debug(LDAP_DEBUG_ANY,
 614                                                 "check_password_quality: module error: (%s) %s.[%d]\n",
 615                                                 pp->pwdCheckModule, txt, ok );
 616                                         free(txt);
 617                                 } else
 618                                         ok = LDAP_SUCCESS;
 619                         }
 620
 621                         lt_dlclose( mod );
 622                 }
 623 #else
 624         Debug(LDAP_DEBUG_ANY, "check_password_quality: external modules not "
 625                 "supported. pwdCheckModule ignored.\n", 0, 0, 0);
 626 #endif /* SLAPD_MODULES */
 627         }
 628
 629
 630         if (ok != LDAP_SUCCESS) {
 631                 rc = LDAP_CONSTRAINT_VIOLATION;
 632                 if (err) *err = PP_insufficientPasswordQuality;
 633         }
 634
 635         return rc;
 636 }
 637
 638 static int
 639 parse_pwdhistory( struct berval *bv, char **oid, time_t *oldtime, struct berval *oldpw )
 640 {
 641         char *ptr;
 642         struct berval nv, npw;
 643         int i, j;
 644
 645         assert (bv && (bv->bv_len > 0) && (bv->bv_val) && oldtime && oldpw );
 646
 647         if ( oid ) *oid = 0;
 648         *oldtime = (time_t)-1;
 649         oldpw->bv_val = NULL;
 650         oldpw->bv_len = 0;
 651
 652         ber_dupbv( &nv, bv );
 653
 654         /* first get the time field */
 655         for(i=0; (i < nv.bv_len) && (nv.bv_val[i] != '#'); i++);
 656         if ( i == nv.bv_len) goto exit_failure; /* couldn't locate the '#' separator */
 657         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 658         ptr = nv.bv_val;
 659         *oldtime = parse_time( ptr );
 660         if (*oldtime == (time_t)-1) goto exit_failure;
 661
 662         /* get the OID field */
 663         for(ptr = &(nv.bv_val[i]);(i < nv.bv_len) && (nv.bv_val[i] != '#'); i++);
 664         if ( i == nv.bv_len) goto exit_failure; /* couldn't locate the '#' separator */
 665         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 666         if ( oid ) *oid = ber_strdup( ptr );
 667
 668         /* get the length field */
 669         for(ptr = &(nv.bv_val[i]);(i < nv.bv_len) && (nv.bv_val[i] != '#'); i++);
 670         if ( i == nv.bv_len) goto exit_failure; /* couldn't locate the '#' separator */
 671         nv.bv_val[i++] = '\0'; /* terminate the string & move to next field */
 672         oldpw->bv_len = strtol( ptr, NULL, 10 );
 673         if (errno == ERANGE) goto exit_failure;
 674
 675         /* lastly, get the octets of the string */
 676         for(j=i, ptr = &(nv.bv_val[i]);i < nv.bv_len; i++);
 677         if (i-j != oldpw->bv_len) goto exit_failure; /* length is wrong */
 678
 679         npw.bv_val = ptr;
 680         npw.bv_len = oldpw->bv_len;
 681         ber_dupbv( oldpw, &npw );
 682
 683         return LDAP_SUCCESS;
 684 exit_failure:
 685         if (oid && *oid) { ber_memfree(*oid); *oid = NULL; }
 686         if (oldpw->bv_val) {
 687                 ber_memfree( oldpw->bv_val); oldpw->bv_val = NULL;
 688                 oldpw->bv_len = 0;
 689         }
 690         ber_memfree(nv.bv_val);
 691         return LDAP_OTHER;
 692 }
 693
 694 static void
 695 add_to_pwd_history( pw_hist **l, time_t t,
 696                     struct berval *oldpw, struct berval *bv )
 697 {
 698         pw_hist *p, *p1, *p2;
 699
 700         if (!l) return;
 701
 702         p = ch_malloc( sizeof( pw_hist ));
 703         p->pw = *oldpw;
 704         ber_dupbv( &p->bv, bv );
 705         p->t = t;
 706         p->next = NULL;
 707
 708         if (*l == NULL) {
 709                 /* degenerate case */
 710                 *l = p;
 711                 return;
 712         }
 713         /*
 714          * advance p1 and p2 such that p1 is the node before the
 715          * new one, and p2 is the node after it
 716          */
 717         for (p1 = NULL, p2 = *l; p2 && p2->t <= t; p1 = p2, p2=p2->next );
 718         p->next = p2;
 719         if (p1 == NULL) { *l = p; return; }
 720         p1->next = p;
 721 }
 722
 723 #ifndef MAX_PWD_HISTORY_SZ
 724 #define MAX_PWD_HISTORY_SZ 1024
 725 #endif /* MAX_PWD_HISTORY_SZ */
 726
 727 static void
 728 make_pwd_history_value( char *timebuf, struct berval *bv, Attribute *pa )
 729 {
 730         char str[ MAX_PWD_HISTORY_SZ ];
 731         int nlen;
 732
 733         snprintf( str, MAX_PWD_HISTORY_SZ,
 734                   "%s#%s#%lu#", timebuf,
 735                   pa->a_desc->ad_type->sat_syntax->ssyn_oid,
 736                   (unsigned long) pa->a_nvals[0].bv_len );
 737         str[MAX_PWD_HISTORY_SZ-1] = 0;
 738         nlen = strlen(str);
 739
 740         /*
 741          * We have to assume that the string is a string of octets,
 742          * not readable characters. In reality, yes, it probably is
 743          * a readable (ie, base64) string, but we can't count on that
 744          * Hence, while the first 3 fields of the password history
 745          * are definitely readable (a timestamp, an OID and an integer
 746          * length), the remaining octets of the actual password
 747          * are deemed to be binary data.
 748          */
 749         AC_MEMCPY( str + nlen, pa->a_nvals[0].bv_val, pa->a_nvals[0].bv_len );
 750         nlen += pa->a_nvals[0].bv_len;
 751         bv->bv_val = ch_malloc( nlen + 1 );
 752         AC_MEMCPY( bv->bv_val, str, nlen );
 753         bv->bv_val[nlen] = '\0';
 754         bv->bv_len = nlen;
 755 }
 756
 757 static void
 758 free_pwd_history_list( pw_hist **l )
 759 {
 760         pw_hist *p;
 761
 762         if (!l) return;
 763         p = *l;
 764         while (p) {
 765                 pw_hist *pp = p->next;
 766
 767                 free(p->pw.bv_val);
 768                 free(p->bv.bv_val);
 769                 free(p);
 770                 p = pp;
 771         }
 772         *l = NULL;
 773 }
 774
 775 typedef struct ppbind {
 776         slap_overinst *on;
 777         int send_ctrl;
 778         Modifications *mod;
 779         LDAPPasswordPolicyError pErr;
 780         PassPolicy pp;
 781 } ppbind;
 782
 783 static int
 784 ppolicy_bind_resp( Operation *op, SlapReply *rs )
 785 {
 786         ppbind *ppb = op->o_callback->sc_private;
 787         slap_overinst *on = ppb->on;
 788         Modifications *mod = ppb->mod, *m;
 789         int pwExpired = 0;
 790         int ngut = -1, warn = -1, age, rc;
 791         Attribute *a;
 792         time_t now, pwtime = (time_t)-1;
 793         char nowstr[ LDAP_LUTIL_GENTIME_BUFSIZE ];
 794         struct berval timestamp;
 795         BackendInfo *bi = op->o_bd->bd_info;
 796         Entry *e;
 797
 798         /* If we already know it's locked, just get on with it */
 799         if ( ppb->pErr != PP_noError ) {
 800                 goto locked;
 801         }
 802
 803         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 804         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 805         op->o_bd->bd_info = bi;
 806
 807         if ( rc != LDAP_SUCCESS ) {
 808                 return SLAP_CB_CONTINUE;
 809         }
 810
 811         now = slap_get_time(); /* stored for later consideration */
 812         timestamp.bv_val = nowstr;
 813         timestamp.bv_len = sizeof(nowstr);
 814         slap_timestamp( &now, &timestamp );
 815
 816         if ( rs->sr_err == LDAP_INVALID_CREDENTIALS ) {
 817                 int i = 0, fc = 0;
 818
 819                 m = ch_calloc( sizeof(Modifications), 1 );
 820                 m->sml_op = LDAP_MOD_ADD;
 821                 m->sml_flags = 0;
 822                 m->sml_type = ad_pwdFailureTime->ad_cname;
 823                 m->sml_desc = ad_pwdFailureTime;
 824                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 825                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 826
 827                 ber_dupbv( &m->sml_values[0], &timestamp );
 828                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 829                 m->sml_next = mod;
 830                 mod = m;
 831
 832                 /*
 833                  * Count the pwdFailureTimes - if it's
 834                  * greater than the policy pwdMaxFailure,
 835                  * then lock the account.
 836                  */
 837                 if ((a = attr_find( e->e_attrs, ad_pwdFailureTime )) != NULL) {
 838                         for(i=0; a->a_nvals[i].bv_val; i++) {
 839
 840                                 /*
 841                                  * If the interval is 0, then failures
 842                                  * stay on the record until explicitly
 843                                  * reset by successful authentication.
 844                                  */
 845                                 if (ppb->pp.pwdFailureCountInterval == 0) {
 846                                         fc++;
 847                                 } else if (now <=
 848                                                         parse_time(a->a_nvals[i].bv_val) +
 849                                                         ppb->pp.pwdFailureCountInterval) {
 850
 851                                         fc++;
 852                                 }
 853                                 /*
 854                                  * We only count those failures
 855                                  * which are not due to expire.
 856                                  */
 857                         }
 858                 }
 859
 860                 if ((ppb->pp.pwdMaxFailure > 0) &&
 861                         (fc >= ppb->pp.pwdMaxFailure - 1)) {
 862
 863                         /*
 864                          * We subtract 1 from the failure max
 865                          * because the new failure entry hasn't
 866                          * made it to the entry yet.
 867                          */
 868                         m = ch_calloc( sizeof(Modifications), 1 );
 869                         m->sml_op = LDAP_MOD_REPLACE;
 870                         m->sml_flags = 0;
 871                         m->sml_type = ad_pwdAccountLockedTime->ad_cname;
 872                         m->sml_desc = ad_pwdAccountLockedTime;
 873                         m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 874                         m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 875                         ber_dupbv( &m->sml_values[0], &timestamp );
 876                         ber_dupbv( &m->sml_nvalues[0], &timestamp );
 877                         m->sml_next = mod;
 878                         mod = m;
 879                 }
 880         } else if ( rs->sr_err == LDAP_SUCCESS ) {
 881                 if ((a = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
 882                         pwtime = parse_time( a->a_nvals[0].bv_val );
 883
 884                 /* delete all pwdFailureTimes */
 885                 if ( attr_find( e->e_attrs, ad_pwdFailureTime )) {
 886                         m = ch_calloc( sizeof(Modifications), 1 );
 887                         m->sml_op = LDAP_MOD_DELETE;
 888                         m->sml_flags = 0;
 889                         m->sml_type = ad_pwdFailureTime->ad_cname;
 890                         m->sml_desc = ad_pwdFailureTime;
 891                         m->sml_next = mod;
 892                         mod = m;
 893                 }
 894
 895                 /*
 896                  * check to see if the password must be changed
 897                  */
 898                 if ( ppb->pp.pwdMustChange &&
 899                         (a = attr_find( e->e_attrs, ad_pwdReset )) &&
 900                         !strcmp( a->a_nvals[0].bv_val, "TRUE" ) ) {
 901                         /*
 902                          * need to inject client controls here to give
 903                          * more information. For the moment, we ensure
 904                          * that we are disallowed from doing anything
 905                          * other than change password.
 906                          */
 907                         ber_dupbv( &pwcons[op->o_conn->c_conn_idx].dn,
 908                                 &op->o_conn->c_ndn );
 909
 910                         ppb->pErr = PP_changeAfterReset;
 911
 912                 } else {
 913                         /*
 914                          * the password does not need to be changed, so
 915                          * we now check whether the password has expired.
 916                          *
 917                          * We can skip this bit if passwords don't age in
 918                          * the policy.
 919                          */
 920                         if (ppb->pp.pwdMaxAge == 0) goto grace;
 921
 922                         if (pwtime == (time_t)-1) {
 923                                 /*
 924                                  * Hmm. No password changed time on the
 925                                  * entry. This is odd - it should have
 926                                  * been provided when the attribute was added.
 927                                  *
 928                                  * However, it's possible that it could be
 929                                  * missing if the DIT was established via
 930                                  * an import process.
 931                                  */
 932                                 Debug( LDAP_DEBUG_ANY,
 933                                         "ppolicy_bind: Entry %s does not have valid pwdChangedTime attribute - assuming password expired\n",
 934                                         e->e_name.bv_val, 0, 0);
 935
 936                                 pwExpired = 1;
 937                         } else {
 938                                 /*
 939                                  * Check: was the last change time of
 940                                  * the password older than the maximum age
 941                                  * allowed. (Ignore case 2 from I-D, it's just silly.)
 942                                  */
 943                                 if (now - pwtime > ppb->pp.pwdMaxAge ) pwExpired = 1;
 944                         }
 945                 }
 946
 947 grace:
 948                 if (!pwExpired) goto check_expiring_password;
 949
 950                 if ((a = attr_find( e->e_attrs, ad_pwdGraceUseTime )) == NULL)
 951                         ngut = ppb->pp.pwdGraceAuthNLimit;
 952                 else {
 953                         for(ngut=0; a->a_nvals[ngut].bv_val; ngut++);
 954                         ngut = ppb->pp.pwdGraceAuthNLimit - ngut;
 955                 }
 956
 957                 /*
 958                  * ngut is the number of remaining grace logins
 959                  */
 960                 Debug( LDAP_DEBUG_ANY,
 961                         "ppolicy_bind: Entry %s has an expired password: %d grace logins\n",
 962                         e->e_name.bv_val, ngut, 0);
 963
 964                 if (ngut < 1) {
 965                         ppb->pErr = PP_passwordExpired;
 966                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 967                         goto done;
 968                 }
 969
 970                 /*
 971                  * Add a grace user time to the entry
 972                  */
 973                 m = ch_calloc( sizeof(Modifications), 1 );
 974                 m->sml_op = LDAP_MOD_ADD;
 975                 m->sml_flags = 0;
 976                 m->sml_type = ad_pwdGraceUseTime->ad_cname;
 977                 m->sml_desc = ad_pwdGraceUseTime;
 978                 m->sml_values = ch_calloc( sizeof(struct berval), 2 );
 979                 m->sml_nvalues = ch_calloc( sizeof(struct berval), 2 );
 980                 ber_dupbv( &m->sml_values[0], &timestamp );
 981                 ber_dupbv( &m->sml_nvalues[0], &timestamp );
 982                 m->sml_next = mod;
 983                 mod = m;
 984
 985 check_expiring_password:
 986                 /*
 987                  * Now we need to check to see
 988                  * if it is about to expire, and if so, should the user
 989                  * be warned about it in the password policy control.
 990                  *
 991                  * If the password has expired, and we're in the grace period, then
 992                  * we don't need to do this bit. Similarly, if we don't have password
 993                  * aging, then there's no need to do this bit either.
 994                  */
 995                 if ((ppb->pp.pwdMaxAge < 1) || (pwExpired) || (ppb->pp.pwdExpireWarning < 1))
 996                         goto done;
 997
 998                 age = (int)(now - pwtime);
 999
1000                 /*
1001                  * We know that there is a password Change Time attribute - if
1002                  * there wasn't, then the pwdExpired value would be true, unless
1003                  * there is no password aging - and if there is no password aging,
1004                  * then this section isn't called anyway - you can't have an
1005                  * expiring password if there's no limit to expire.
1006                  */
1007                 if (ppb->pp.pwdMaxAge - age < ppb->pp.pwdExpireWarning ) {
1008                         /*
1009                          * Set the warning value.
1010                          */
1011                         warn = ppb->pp.pwdMaxAge - age; /* seconds left until expiry */
1012                         if (warn < 0) warn = 0; /* something weird here - why is pwExpired not set? */
1013
1014                         Debug( LDAP_DEBUG_ANY,
1015                                 "ppolicy_bind: Setting warning for password expiry for %s = %d seconds\n",
1016                                 op->o_req_dn.bv_val, warn, 0 );
1017                 }
1018         }
1019
1020 done:
1021         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1022         be_entry_release_r( op, e );
1023
1024 locked:
1025         if ( mod ) {
1026                 Operation op2 = *op;
1027                 SlapReply r2 = { REP_RESULT };
1028                 slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
1029
1030                 /* FIXME: Need to handle replication of some (but not all)
1031                  * of the operational attributes...
1032                  */
1033                 op2.o_tag = LDAP_REQ_MODIFY;
1034                 op2.o_callback = &cb;
1035                 op2.orm_modlist = mod;
1036                 op2.o_dn = op->o_bd->be_rootdn;
1037                 op2.o_ndn = op->o_bd->be_rootndn;
1038                 op2.o_bd->bd_info = (BackendInfo *)on->on_info;
1039                 rc = op->o_bd->be_modify( &op2, &r2 );
1040                 slap_mods_free( mod, 1 );
1041         }
1042
1043         if ( ppb->send_ctrl ) {
1044                 LDAPControl **ctrls = NULL;
1045                 pp_info *pi = on->on_bi.bi_private;
1046
1047                 /* Do we really want to tell that the account is locked? */
1048                 if ( ppb->pErr == PP_accountLocked && !pi->use_lockout ) {
1049                         ppb->pErr = PP_noError;
1050                 }
1051                 ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
1052                 ctrls[0] = create_passcontrol( warn, ngut, ppb->pErr );
1053                 ctrls[1] = NULL;
1054                 rs->sr_ctrls = ctrls;
1055         }
1056         op->o_bd->bd_info = bi;
1057         return SLAP_CB_CONTINUE;
1058 }
1059
1060 static int
1061 ppolicy_bind( Operation *op, SlapReply *rs )
1062 {
1063         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1064
1065         /* Reset lockout status on all Bind requests */
1066         if ( !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1067                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1068                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1069         }
1070
1071         /* Root bypasses policy */
1072         if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn )) {
1073                 Entry *e;
1074                 int rc;
1075                 ppbind *ppb;
1076                 slap_callback *cb;
1077
1078                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1079                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1080
1081                 if ( rc != LDAP_SUCCESS ) {
1082                         return SLAP_CB_CONTINUE;
1083                 }
1084
1085                 cb = op->o_tmpcalloc( sizeof(ppbind)+sizeof(slap_callback),
1086                         1, op->o_tmpmemctx );
1087                 ppb = (ppbind *)(cb+1);
1088                 ppb->on = on;
1089                 ppb->pErr = PP_noError;
1090
1091                 /* Setup a callback so we can munge the result */
1092
1093                 cb->sc_response = ppolicy_bind_resp;
1094                 cb->sc_next = op->o_callback->sc_next;
1095                 cb->sc_private = ppb;
1096                 op->o_callback->sc_next = cb;
1097
1098                 /* Did we receive a password policy request control? */
1099                 if ( op->o_ctrlflag[ppolicy_cid] ) {
1100                         ppb->send_ctrl = 1;
1101                 }
1102
1103                 op->o_bd->bd_info = (BackendInfo *)on;
1104                 ppolicy_get( op, e, &ppb->pp );
1105
1106                 rc = account_locked( op, e, &ppb->pp, &ppb->mod );
1107
1108                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1109                 be_entry_release_r( op, e );
1110
1111                 if ( rc ) {
1112                         /* This will be the Draft 8 response, Unwilling is bogus */
1113                         ppb->pErr = PP_accountLocked;
1114                         send_ldap_error( op, rs, LDAP_INVALID_CREDENTIALS, NULL );
1115                         return rs->sr_err;
1116                 }
1117
1118         }
1119
1120         return SLAP_CB_CONTINUE;
1121 }
1122
1123 /* Reset the restricted info for the next session on this connection */
1124 static int
1125 ppolicy_connection_destroy( BackendDB *bd, Connection *conn )
1126 {
1127         if ( !BER_BVISEMPTY( &pwcons[conn->c_conn_idx].dn )) {
1128                 ch_free( pwcons[conn->c_conn_idx].dn.bv_val );
1129                 BER_BVZERO( &pwcons[conn->c_conn_idx].dn );
1130         }
1131         return SLAP_CB_CONTINUE;
1132 }
1133
1134 /* Check if this connection is restricted */
1135 static int
1136 ppolicy_restrict(
1137         Operation *op,
1138         SlapReply *rs )
1139 {
1140         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1141         int send_ctrl = 0;
1142
1143         /* Did we receive a password policy request control? */
1144         if ( op->o_ctrlflag[ppolicy_cid] ) {
1145                 send_ctrl = 1;
1146         }
1147
1148         if ( op->o_conn && !BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1149                 /* if the current authcDN doesn't match the one we recorded,
1150                  * then an intervening Bind has succeeded and the restriction
1151                  * no longer applies. (ITS#4516)
1152                  */
1153                 if ( !dn_match( &op->o_conn->c_ndn,
1154                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1155                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1156                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1157                         return SLAP_CB_CONTINUE;
1158                 }
1159
1160                 Debug( LDAP_DEBUG_TRACE,
1161                         "connection restricted to password changing only\n", 0, 0, 0);
1162                 if ( send_ctrl ) {
1163                         LDAPControl **ctrls = NULL;
1164
1165                         ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
1166                         ctrls[0] = create_passcontrol( -1, -1, PP_changeAfterReset );
1167                         ctrls[1] = NULL;
1168                         rs->sr_ctrls = ctrls;
1169                 }
1170                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1171                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
1172                         "Operations are restricted to bind/unbind/abandon/StartTLS/modify password" );
1173                 return rs->sr_err;
1174         }
1175
1176         return SLAP_CB_CONTINUE;
1177 }
1178
1179 static int
1180 ppolicy_add(
1181         Operation *op,
1182         SlapReply *rs )
1183 {
1184         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
1185         pp_info *pi = on->on_bi.bi_private;
1186         PassPolicy pp;
1187         Attribute *pa;
1188         const char *txt;
1189
1190         if ( ppolicy_restrict( op, rs ) != SLAP_CB_CONTINUE )
1191                 return rs->sr_err;
1192
1193         /* If this is a replica, assume the master checked everything */
1194         if ( be_shadow_update( op ))
1195                 return SLAP_CB_CONTINUE;
1196
1197         /* Check for password in entry */
1198         if ((pa = attr_find( op->oq_add.rs_e->e_attrs,
1199                 slap_schema.si_ad_userPassword )))
1200         {
1201                 assert( pa->a_vals );
1202                 assert( !BER_BVISNULL( &pa->a_vals[ 0 ] ) );
1203
1204                 if ( !BER_BVISNULL( &pa->a_vals[ 1 ] ) ) {
1205                         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, "Password policy only allows one password value" );
1206                         return rs->sr_err;
1207                 }
1208
1209                 /*
1210                  * new entry contains a password - if we're not the root user
1211                  * then we need to check that the password fits in with the
1212                  * security policy for the new entry.
1213                  */
1214                 ppolicy_get( op, op->ora_e, &pp );
1215                 if (pp.pwdCheckQuality > 0 && !be_isroot( op )) {
1216                         struct berval *bv = &(pa->a_vals[0]);
1217                         int rc, send_ctrl = 0;
1218                         LDAPPasswordPolicyError pErr = PP_noError;
1219
1220                         /* Did we receive a password policy request control? */
1221                         if ( op->o_ctrlflag[ppolicy_cid] ) {
1222                                 send_ctrl = 1;
1223                         }
1224                         rc = check_password_quality( bv, &pp, &pErr, op->ora_e );
1225                         if (rc != LDAP_SUCCESS) {
1226                                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1227                                 if ( send_ctrl ) {
1228                                         LDAPControl **ctrls = NULL;
1229
1230                                         ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
1231                                         ctrls[0] = create_passcontrol( -1, -1, pErr );
1232                                         ctrls[1] = NULL;
1233                                         rs->sr_ctrls = ctrls;
1234                                 }
1235                                 send_ldap_error( op, rs, rc, "Password fails quality checking policy" );
1236                                 return rs->sr_err;
1237                         }
1238                 }
1239                         /*
1240                          * A controversial bit. We hash cleartext
1241                          * passwords provided via add and modify operations
1242                          * You're not really supposed to do this, since
1243                          * the X.500 model says "store attributes" as they
1244                          * get provided. By default, this is what we do
1245                          *
1246                          * But if the hash_passwords flag is set, we hash
1247                          * any cleartext password attribute values via the
1248                          * default password hashing scheme.
1249                          */
1250                 if ((pi->hash_passwords) &&
1251                         (password_scheme( &(pa->a_vals[0]), NULL ) != LDAP_SUCCESS)) {
1252                         struct berval hpw;
1253
1254                         slap_passwd_hash( &(pa->a_vals[0]), &hpw, &txt );
1255                         if (hpw.bv_val == NULL) {
1256                                 /*
1257                                  * hashing didn't work. Emit an error.
1258                                  */
1259                                 rs->sr_err = LDAP_OTHER;
1260                                 rs->sr_text = txt;
1261                                 send_ldap_error( op, rs, LDAP_OTHER, "Password hashing failed" );
1262                                 return rs->sr_err;
1263                         }
1264
1265                         memset( pa->a_vals[0].bv_val, 0, pa->a_vals[0].bv_len);
1266                         ber_memfree( pa->a_vals[0].bv_val );
1267                         pa->a_vals[0].bv_val = hpw.bv_val;
1268                         pa->a_vals[0].bv_len = hpw.bv_len;
1269                 }
1270
1271                 /* If password aging is in effect, set the pwdChangedTime */
1272                 if ( pp.pwdMaxAge || pp.pwdMinAge ) {
1273                         struct berval timestamp;
1274                         char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1275                         time_t now = slap_get_time();
1276
1277                         timestamp.bv_val = timebuf;
1278                         timestamp.bv_len = sizeof(timebuf);
1279                         slap_timestamp( &now, &timestamp );
1280
1281                         attr_merge_one( op->ora_e, ad_pwdChangedTime, &timestamp, &timestamp );
1282                 }
1283         }
1284         return SLAP_CB_CONTINUE;
1285 }
1286
1287 static int
1288 ppolicy_mod_cb( Operation *op, SlapReply *rs )
1289 {
1290         slap_callback *sc = op->o_callback;
1291         op->o_callback = sc->sc_next;
1292         if ( rs->sr_err == LDAP_SUCCESS ) {
1293                 ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1294                 BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1295         }
1296         op->o_tmpfree( sc, op->o_tmpmemctx );
1297         return SLAP_CB_CONTINUE;
1298 }
1299
1300 static int
1301 ppolicy_modify( Operation *op, SlapReply *rs )
1302 {
1303         slap_overinst           *on = (slap_overinst *)op->o_bd->bd_info;
1304         pp_info                 *pi = on->on_bi.bi_private;
1305         int                     i, rc, mod_pw_only, pwmod, pwmop = -1, deladd,
1306                                 hsize = 0;
1307         PassPolicy              pp;
1308         Modifications           *mods = NULL, *modtail = NULL,
1309                                 *ml, *delmod, *addmod;
1310         Attribute               *pa, *ha, at;
1311         const char              *txt;
1312         pw_hist                 *tl = NULL, *p;
1313         int                     zapReset, send_ctrl = 0;
1314         Entry                   *e;
1315         struct berval           newpw = BER_BVNULL, oldpw = BER_BVNULL,
1316                                 *bv, cr[2];
1317         LDAPPasswordPolicyError pErr = PP_noError;
1318
1319         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1320         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
1321         op->o_bd->bd_info = (BackendInfo *)on;
1322
1323         if ( rc != LDAP_SUCCESS ) return SLAP_CB_CONTINUE;
1324
1325         /* If this is a replica, we may need to tweak some of the
1326          * master's modifications. Otherwise, just pass it through.
1327          */
1328         if ( be_shadow_update( op )) {
1329                 Modifications **prev;
1330                 int got_del_grace = 0, got_del_lock = 0, got_pw = 0, got_del_fail = 0;
1331                 Attribute *a_grace, *a_lock, *a_fail;
1332
1333                 a_grace = attr_find( e->e_attrs, ad_pwdGraceUseTime );
1334                 a_lock = attr_find( e->e_attrs, ad_pwdAccountLockedTime );
1335                 a_fail = attr_find( e->e_attrs, ad_pwdFailureTime );
1336
1337                 for( prev = &op->oq_modify.rs_modlist, ml = *prev; ml; ml = *prev ) {
1338
1339                         if ( ml->sml_desc == slap_schema.si_ad_userPassword )
1340                                 got_pw = 1;
1341
1342                         /* If we're deleting an attr that didn't exist,
1343                          * drop this delete op
1344                          */
1345                         if ( ml->sml_op == LDAP_MOD_DELETE ) {
1346                                 int drop = 0;
1347
1348                                 if ( ml->sml_desc == ad_pwdGraceUseTime ) {
1349                                         got_del_grace = 1;
1350                                         if ( !a_grace )
1351                                                 drop = 1;
1352                                 } else
1353                                 if ( ml->sml_desc == ad_pwdAccountLockedTime ) {
1354                                         got_del_lock = 1;
1355                                         if ( !a_lock )
1356                                                 drop = 1;
1357                                 } else
1358                                 if ( ml->sml_desc == ad_pwdFailureTime ) {
1359                                         got_del_fail = 1;
1360                                         if ( !a_fail )
1361                                                 drop = 1;
1362                                 }
1363                                 if ( drop ) {
1364                                         *prev = ml->sml_next;
1365                                         ml->sml_next = NULL;
1366                                         slap_mods_free( ml, 1 );
1367                                         continue;
1368                                 }
1369                         }
1370                         prev = &ml->sml_next;
1371                 }
1372
1373                 /* If we're resetting the password, make sure grace, accountlock,
1374                  * and failure also get removed.
1375                  */
1376                 if ( got_pw ) {
1377                         if ( a_grace && !got_del_grace ) {
1378                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1379                                 ml->sml_op = LDAP_MOD_DELETE;
1380                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1381                                 ml->sml_type.bv_val = NULL;
1382                                 ml->sml_desc = ad_pwdGraceUseTime;
1383                                 ml->sml_values = NULL;
1384                                 ml->sml_nvalues = NULL;
1385                                 ml->sml_next = NULL;
1386                                 *prev = ml;
1387                                 prev = &ml->sml_next;
1388                         }
1389                         if ( a_lock && !got_del_lock ) {
1390                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1391                                 ml->sml_op = LDAP_MOD_DELETE;
1392                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1393                                 ml->sml_type.bv_val = NULL;
1394                                 ml->sml_desc = ad_pwdAccountLockedTime;
1395                                 ml->sml_values = NULL;
1396                                 ml->sml_nvalues = NULL;
1397                                 ml->sml_next = NULL;
1398                                 *prev = ml;
1399                         }
1400                         if ( a_fail && !got_del_fail ) {
1401                                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1402                                 ml->sml_op = LDAP_MOD_DELETE;
1403                                 ml->sml_flags = SLAP_MOD_INTERNAL;
1404                                 ml->sml_type.bv_val = NULL;
1405                                 ml->sml_desc = ad_pwdFailureTime;
1406                                 ml->sml_values = NULL;
1407                                 ml->sml_nvalues = NULL;
1408                                 ml->sml_next = NULL;
1409                                 *prev = ml;
1410                         }
1411                 }
1412                 op->o_bd->bd_info = (BackendInfo *)on->on_info;
1413                 be_entry_release_r( op, e );
1414                 return SLAP_CB_CONTINUE;
1415         }
1416
1417         /* Did we receive a password policy request control? */
1418         if ( op->o_ctrlflag[ppolicy_cid] ) {
1419                 send_ctrl = 1;
1420         }
1421
1422         /* See if this is a pwdModify exop. If so, we can
1423          * access the plaintext passwords from that request.
1424          */
1425         {
1426                 slap_callback *sc;
1427
1428                 for ( sc = op->o_callback; sc; sc=sc->sc_next ) {
1429                         if ( sc->sc_response == slap_replog_cb &&
1430                                 sc->sc_private ) {
1431                                 req_pwdexop_s *qpw = sc->sc_private;
1432                                 newpw = qpw->rs_new;
1433                                 oldpw = qpw->rs_old;
1434                                 break;
1435                         }
1436                 }
1437         }
1438
1439         ppolicy_get( op, e, &pp );
1440
1441         for ( ml = op->oq_modify.rs_modlist,
1442                         pwmod = 0, mod_pw_only = 1,
1443                         deladd = 0, delmod = NULL,
1444                         addmod = NULL,
1445                         zapReset = 1;
1446                 ml != NULL; modtail = ml, ml = ml->sml_next )
1447         {
1448                 if ( ml->sml_desc == pp.ad ) {
1449                         pwmod = 1;
1450                         pwmop = ml->sml_op;
1451                         if ((deladd == 0) && (ml->sml_op == LDAP_MOD_DELETE) &&
1452                                 (ml->sml_values) && !BER_BVISNULL( &ml->sml_values[0] ))
1453                         {
1454                                 deladd = 1;
1455                                 delmod = ml;
1456                         }
1457
1458                         if ((deladd == 1) && ((ml->sml_op == LDAP_MOD_ADD) ||
1459                                   (ml->sml_op == LDAP_MOD_REPLACE)))
1460                         {
1461                                 deladd = 2;
1462                         }
1463
1464                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1465                                 (ml->sml_op == LDAP_MOD_REPLACE))
1466                         {
1467                                 addmod = ml;
1468
1469                                 /* FIXME: there's no easy way to ensure
1470                                  * that add does not cause multiple
1471                                  * userPassword values; one way (that
1472                                  * would be consistent with the single
1473                                  * password constraint) would be to turn
1474                                  * add into replace); another would be
1475                                  * to disallow add.
1476                                  *
1477                                  * Let's check at least that a single value
1478                                  * is being added
1479                                  */
1480                                 assert( addmod->sml_values != NULL );
1481                                 assert( !BER_BVISNULL( &addmod->sml_values[ 0 ] ) );
1482                                 if ( !BER_BVISNULL( &addmod->sml_values[ 1 ] ) ) {
1483                                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1484                                         rs->sr_text = "Password policy only allows one password value";
1485                                         goto return_results;
1486                                 }
1487                         }
1488
1489                 } else if (! is_at_operational( ml->sml_desc->ad_type )) {
1490                         mod_pw_only = 0;
1491                         /* modifying something other than password */
1492                 }
1493
1494                 /*
1495                  * If there is a request to explicitly add a pwdReset
1496                  * attribute, then we suppress the normal behaviour on
1497                  * password change, which is to remove the pwdReset
1498                  * attribute.
1499                  *
1500                  * This enables an administrator to assign a new password
1501                  * and place a "must reset" flag on the entry, which will
1502                  * stay until the user explicitly changes his/her password.
1503                  */
1504                 if (ml->sml_desc == ad_pwdReset ) {
1505                         if ((ml->sml_op == LDAP_MOD_ADD) ||
1506                                 (ml->sml_op == LDAP_MOD_REPLACE))
1507                                 zapReset = 0;
1508                 }
1509         }
1510
1511         if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn ) && !mod_pw_only ) {
1512                 if ( dn_match( &op->o_conn->c_ndn,
1513                                 &pwcons[op->o_conn->c_conn_idx].dn )) {
1514                         Debug( LDAP_DEBUG_TRACE,
1515                                 "connection restricted to password changing only\n", 0, 0, 0 );
1516                         rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1517                         rs->sr_text = "Operations are restricted to bind/unbind/abandon/StartTLS/modify password";
1518                         pErr = PP_changeAfterReset;
1519                         goto return_results;
1520                 } else {
1521                         ch_free( pwcons[op->o_conn->c_conn_idx].dn.bv_val );
1522                         BER_BVZERO( &pwcons[op->o_conn->c_conn_idx].dn );
1523                 }
1524         }
1525
1526         /*
1527          * if we have a "safe password modify policy", then we need to check if we're doing
1528          * a delete (with the old password), followed by an add (with the new password).
1529          *
1530          * If we don't have this, then we fail with an error. We also skip all the checks if
1531          * the root user is bound. Root can do anything, including avoid the policies.
1532          */
1533
1534         if (!pwmod) goto do_modify;
1535
1536         /*
1537          * Did we get a valid add mod?
1538          */
1539
1540         if (!addmod) {
1541                 rs->sr_err = LDAP_OTHER;
1542                 rs->sr_text = "Internal Error";
1543                 Debug( LDAP_DEBUG_TRACE,
1544                         "cannot locate modification supplying new password\n", 0, 0, 0 );
1545                 goto return_results;
1546         }
1547
1548         /*
1549          * Build the password history list in ascending time order
1550          * We need this, even if the user is root, in order to maintain
1551          * the pwdHistory operational attributes properly.
1552          */
1553         if (pp.pwdInHistory > 0 && (ha = attr_find( e->e_attrs, ad_pwdHistory ))) {
1554                 struct berval oldpw;
1555                 time_t oldtime;
1556
1557                 for(i=0; ha->a_nvals[i].bv_val; i++) {
1558                         rc = parse_pwdhistory( &(ha->a_nvals[i]), NULL,
1559                                 &oldtime, &oldpw );
1560
1561                         if (rc != LDAP_SUCCESS) continue; /* invalid history entry */
1562
1563                         if (oldpw.bv_val) {
1564                                 add_to_pwd_history( &tl, oldtime, &oldpw,
1565                                         &(ha->a_nvals[i]) );
1566                                 oldpw.bv_val = NULL;
1567                                 oldpw.bv_len = 0;
1568                         }
1569                 }
1570                 for(p=tl; p; p=p->next, hsize++); /* count history size */
1571         }
1572
1573         if (be_isroot( op )) goto do_modify;
1574
1575         /* This is a pwdModify exop that provided the old pw.
1576          * We need to create a Delete mod for this old pw and
1577          * let the matching value get found later
1578          */
1579         if (pp.pwdSafeModify && oldpw.bv_val ) {
1580                 ml = (Modifications *) ch_malloc( sizeof( Modifications ) );
1581                 ml->sml_op = LDAP_MOD_DELETE;
1582                 ml->sml_flags = SLAP_MOD_INTERNAL;
1583                 ml->sml_desc = pp.ad;
1584                 ml->sml_type = pp.ad->ad_cname;
1585                 ml->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1586                 ber_dupbv( &ml->sml_values[0], &oldpw );
1587                 ml->sml_values[1].bv_len = 0;
1588                 ml->sml_values[1].bv_val = NULL;
1589                 ml->sml_nvalues = NULL;
1590                 ml->sml_next = op->orm_modlist;
1591                 op->orm_modlist = ml;
1592                 delmod = ml;
1593                 deladd = 2;
1594         }
1595
1596         if (pp.pwdSafeModify && deladd != 2) {
1597                 Debug( LDAP_DEBUG_TRACE,
1598                         "change password must use DELETE followed by ADD/REPLACE\n",
1599                         0, 0, 0 );
1600                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1601                 rs->sr_text = "Must supply old password to be changed as well as new one";
1602                 pErr = PP_mustSupplyOldPassword;
1603                 goto return_results;
1604         }
1605
1606         if (!pp.pwdAllowUserChange) {
1607                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
1608                 rs->sr_text = "User alteration of password is not allowed";
1609                 pErr = PP_passwordModNotAllowed;
1610                 goto return_results;
1611         }
1612
1613         if (pp.pwdMinAge > 0) {
1614                 time_t pwtime = (time_t)-1, now;
1615                 int age;
1616
1617                 if ((pa = attr_find( e->e_attrs, ad_pwdChangedTime )) != NULL)
1618                         pwtime = parse_time( pa->a_nvals[0].bv_val );
1619                 now = slap_get_time();
1620                 age = (int)(now - pwtime);
1621                 if ((pwtime != (time_t)-1) && (age < pp.pwdMinAge)) {
1622                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1623                         rs->sr_text = "Password is too young to change";
1624                         pErr = PP_passwordTooYoung;
1625                         goto return_results;
1626                 }
1627         }
1628
1629         /* pa is used in password history check below, be sure it's set */
1630         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL && delmod) {
1631                 /*
1632                  * we have a password to check
1633                  */
1634                 const char *txt;
1635
1636                 bv = oldpw.bv_val ? &oldpw : delmod->sml_values;
1637                 /* FIXME: no access checking? */
1638                 rc = slap_passwd_check( op, NULL, pa, bv, &txt );
1639                 if (rc != LDAP_SUCCESS) {
1640                         Debug( LDAP_DEBUG_TRACE,
1641                                 "old password check failed: %s\n", txt, 0, 0 );
1642
1643                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1644                         rs->sr_text = "Must supply correct old password to change to new one";
1645                         pErr = PP_mustSupplyOldPassword;
1646                         goto return_results;
1647
1648                 } else {
1649                         int i;
1650
1651                         /*
1652                          * replace the delete value with the (possibly hashed)
1653                          * value which is currently in the password.
1654                          */
1655                         for(i=0; delmod->sml_values[i].bv_val; i++) {
1656                                 free(delmod->sml_values[i].bv_val);
1657                                 delmod->sml_values[i].bv_len = 0;
1658                         }
1659                         free(delmod->sml_values);
1660                         delmod->sml_values = ch_calloc( sizeof(struct berval), 2 );
1661                         delmod->sml_values[1].bv_len = 0;
1662                         delmod->sml_values[1].bv_val = NULL;
1663                         ber_dupbv(&(delmod->sml_values[0]),  &(pa->a_nvals[0]));
1664                 }
1665         }
1666
1667         bv = newpw.bv_val ? &newpw : addmod->sml_values;
1668         if (pp.pwdCheckQuality > 0) {
1669
1670                 rc = check_password_quality( bv, &pp, &pErr, e );
1671                 if (rc != LDAP_SUCCESS) {
1672                         rs->sr_err = rc;
1673                         rs->sr_text = "Password fails quality checking policy";
1674                         goto return_results;
1675                 }
1676         }
1677
1678         if (pa) {
1679                 /*
1680                  * Last check - the password history.
1681                  */
1682                 /* FIXME: no access checking? */
1683                 if (slap_passwd_check( op, NULL, pa, bv, &txt ) == LDAP_SUCCESS) {
1684                         /*
1685                          * This is bad - it means that the user is attempting
1686                          * to set the password to the same as the old one.
1687                          */
1688                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1689                         rs->sr_text = "Password is not being changed from existing value";
1690                         pErr = PP_passwordInHistory;
1691                         goto return_results;
1692                 }
1693
1694                 if (pp.pwdInHistory < 1) goto do_modify;
1695
1696                 /*
1697                  * Iterate through the password history, and fail on any
1698                  * password matches.
1699                  */
1700                 at = *pa;
1701                 at.a_vals = cr;
1702                 cr[1].bv_val = NULL;
1703                 for(p=tl; p; p=p->next) {
1704                         cr[0] = p->pw;
1705                         /* FIXME: no access checking? */
1706                         rc = slap_passwd_check( op, NULL, &at, bv, &txt );
1707
1708                         if (rc != LDAP_SUCCESS) continue;
1709
1710                         rs->sr_err = LDAP_CONSTRAINT_VIOLATION;
1711                         rs->sr_text = "Password is in history of old passwords";
1712                         pErr = PP_passwordInHistory;
1713                         goto return_results;
1714                 }
1715         }
1716
1717 do_modify:
1718         if (pwmod) {
1719                 struct berval timestamp;
1720                 char timebuf[ LDAP_LUTIL_GENTIME_BUFSIZE ];
1721                 time_t now = slap_get_time();
1722
1723                 /* If the conn is restricted, set a callback to clear it
1724                  * if the pwmod succeeds
1725                  */
1726                 if (!BER_BVISEMPTY( &pwcons[op->o_conn->c_conn_idx].dn )) {
1727                         slap_callback *sc = op->o_tmpcalloc( 1, sizeof( slap_callback ),
1728                                 op->o_tmpmemctx );
1729                         sc->sc_next = op->o_callback;
1730                         /* Must use sc_response to insure we reset on success, before
1731                          * the client sees the response. Must use sc_cleanup to insure
1732                          * that it gets cleaned up if sc_response is not called.
1733                          */
1734                         sc->sc_response = ppolicy_mod_cb;
1735                         sc->sc_cleanup = ppolicy_mod_cb;
1736                         op->o_callback = sc;
1737                 }
1738
1739                 /*
1740                  * keep the necessary pwd.. operational attributes
1741                  * up to date.
1742                  */
1743
1744                 timestamp.bv_val = timebuf;
1745                 timestamp.bv_len = sizeof(timebuf);
1746                 slap_timestamp( &now, &timestamp );
1747
1748                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1749                 mods->sml_type.bv_val = NULL;
1750                 mods->sml_desc = ad_pwdChangedTime;
1751                 if (pwmop != LDAP_MOD_DELETE) {
1752                         mods->sml_op = LDAP_MOD_REPLACE;
1753                         mods->sml_values = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1754                         mods->sml_nvalues = (BerVarray) ch_malloc( 2 * sizeof( struct berval ) );
1755                         ber_dupbv( &mods->sml_values[0], &timestamp );
1756                         ber_dupbv( &mods->sml_nvalues[0], &timestamp );
1757                         mods->sml_values[1].bv_len = 0;
1758                         mods->sml_values[1].bv_val = NULL;
1759                         assert( mods->sml_values[0].bv_val != NULL );
1760                 } else {
1761                         mods->sml_op = LDAP_MOD_DELETE;
1762                         mods->sml_values = NULL;
1763                 }
1764                 mods->sml_flags = SLAP_MOD_INTERNAL;
1765                 mods->sml_nvalues = NULL;
1766                 mods->sml_next = NULL;
1767                 modtail->sml_next = mods;
1768                 modtail = mods;
1769
1770                 if (attr_find(e->e_attrs, ad_pwdGraceUseTime )) {
1771                         mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1772                         mods->sml_op = LDAP_MOD_DELETE;
1773                         mods->sml_flags = SLAP_MOD_INTERNAL;
1774                         mods->sml_type.bv_val = NULL;
1775                         mods->sml_desc = ad_pwdGraceUseTime;
1776                         mods->sml_values = NULL;
1777                         mods->sml_nvalues = NULL;
1778                         mods->sml_next = NULL;
1779                         modtail->sml_next = mods;
1780                         modtail = mods;
1781                 }
1782
1783                 if (attr_find(e->e_attrs, ad_pwdAccountLockedTime )) {
1784                         mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1785                         mods->sml_op = LDAP_MOD_DELETE;
1786                         mods->sml_flags = SLAP_MOD_INTERNAL;
1787                         mods->sml_type.bv_val = NULL;
1788                         mods->sml_desc = ad_pwdAccountLockedTime;
1789                         mods->sml_values = NULL;
1790                         mods->sml_nvalues = NULL;
1791                         mods->sml_next = NULL;
1792                         modtail->sml_next = mods;
1793                         modtail = mods;
1794                 }
1795
1796                 if (attr_find(e->e_attrs, ad_pwdFailureTime )) {
1797                         mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1798                         mods->sml_op = LDAP_MOD_DELETE;
1799                         mods->sml_flags = SLAP_MOD_INTERNAL;
1800                         mods->sml_type.bv_val = NULL;
1801                         mods->sml_desc = ad_pwdFailureTime;
1802                         mods->sml_values = NULL;
1803                         mods->sml_nvalues = NULL;
1804                         mods->sml_next = NULL;
1805                         modtail->sml_next = mods;
1806                         modtail = mods;
1807                 }
1808
1809                 /* Delete the pwdReset attribute, since it's being reset */
1810                 if ((zapReset) && (attr_find(e->e_attrs, ad_pwdReset ))) {
1811                         mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1812                         mods->sml_op = LDAP_MOD_DELETE;
1813                         mods->sml_flags = SLAP_MOD_INTERNAL;
1814                         mods->sml_type.bv_val = NULL;
1815                         mods->sml_desc = ad_pwdReset;
1816                         mods->sml_values = NULL;
1817                         mods->sml_nvalues = NULL;
1818                         mods->sml_next = NULL;
1819                         modtail->sml_next = mods;
1820                         modtail = mods;
1821                 }
1822
1823                 if (pp.pwdInHistory > 0) {
1824                         if (hsize >= pp.pwdInHistory) {
1825                                 /*
1826                                  * We use the >= operator, since we are going to add
1827                                  * the existing password attribute value into the
1828                                  * history - thus the cardinality of history values is
1829                                  * about to rise by one.
1830                                  *
1831                                  * If this would push it over the limit of history
1832                                  * values (remembering - the password policy could have
1833                                  * changed since the password was last altered), we must
1834                                  * delete at least 1 value from the pwdHistory list.
1835                                  *
1836                                  * In fact, we delete '(#pwdHistory attrs - max pwd
1837                                  * history length) + 1' values, starting with the oldest.
1838                                  * This is easily evaluated, since the linked list is
1839                                  * created in ascending time order.
1840                                  */
1841                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1842                                 mods->sml_op = LDAP_MOD_DELETE;
1843                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1844                                 mods->sml_type.bv_val = NULL;
1845                                 mods->sml_desc = ad_pwdHistory;
1846                                 mods->sml_nvalues = NULL;
1847                                 mods->sml_values = ch_calloc( sizeof( struct berval ),
1848                                                                                            hsize - pp.pwdInHistory + 2 );
1849                                 mods->sml_values[ hsize - pp.pwdInHistory + 1 ].bv_val = NULL;
1850                                 mods->sml_values[ hsize - pp.pwdInHistory + 1 ].bv_len = 0;
1851                                 for(i=0,p=tl; i < (hsize - pp.pwdInHistory + 1); i++, p=p->next) {
1852                                         mods->sml_values[i].bv_val = NULL;
1853                                         mods->sml_values[i].bv_len = 0;
1854                                         ber_dupbv( &(mods->sml_values[i]), &p->bv );
1855                                 }
1856                                 mods->sml_next = NULL;
1857                                 modtail->sml_next = mods;
1858                                 modtail = mods;
1859                         }
1860                         free_pwd_history_list( &tl );
1861
1862                         /*
1863                          * Now add the existing password into the history list.
1864                          * This will be executed even if the operation is to delete
1865                          * the password entirely.
1866                          *
1867                          * This isn't in the spec explicitly, but it seems to make
1868                          * sense that the password history list is the list of all
1869                          * previous passwords - even if they were deleted. Thus, if
1870                          * someone tries to add a historical password at some future
1871                          * point, it will fail.
1872                          */
1873                         if ((pa = attr_find( e->e_attrs, pp.ad )) != NULL) {
1874                                 mods = (Modifications *) ch_malloc( sizeof( Modifications ) );
1875                                 mods->sml_op = LDAP_MOD_ADD;
1876                                 mods->sml_flags = SLAP_MOD_INTERNAL;
1877                                 mods->sml_type.bv_val = NULL;
1878                                 mods->sml_desc = ad_pwdHistory;
1879                                 mods->sml_nvalues = NULL;
1880                                 mods->sml_values = ch_calloc( sizeof( struct berval ), 2 );
1881                                 mods->sml_values[ 1 ].bv_val = NULL;
1882                                 mods->sml_values[ 1 ].bv_len = 0;
1883                                 make_pwd_history_value( timebuf, &mods->sml_values[0], pa );
1884                                 mods->sml_next = NULL;
1885                                 modtail->sml_next = mods;
1886                                 modtail = mods;
1887                         } else {
1888                                 Debug( LDAP_DEBUG_TRACE,
1889                                 "ppolicy_modify: password attr lookup failed\n", 0, 0, 0 );
1890                         }
1891                 }
1892
1893                 /*
1894                  * Controversial bit here. If the new password isn't hashed
1895                  * (ie, is cleartext), we probably should hash it according
1896                  * to the default hash. The reason for this is that we want
1897                  * to use the policy if possible, but if we hash the password
1898                  * before, then we're going to run into trouble when it
1899                  * comes time to check the password.
1900                  *
1901                  * Now, the right thing to do is to use the extended password
1902                  * modify operation, but not all software can do this,
1903                  * therefore it makes sense to hash the new password, now
1904                  * we know it passes the policy requirements.
1905                  *
1906                  * Of course, if the password is already hashed, then we
1907                  * leave it alone.
1908                  */
1909
1910                 if ((pi->hash_passwords) && (addmod) && !newpw.bv_val &&
1911                         (password_scheme( &(addmod->sml_values[0]), NULL ) != LDAP_SUCCESS)) {
1912                         struct berval hpw, bv;
1913
1914                         slap_passwd_hash( &(addmod->sml_values[0]), &hpw, &txt );
1915                         if (hpw.bv_val == NULL) {
1916                                         /*
1917                                          * hashing didn't work. Emit an error.
1918                                          */
1919                                 rs->sr_err = LDAP_OTHER;
1920                                 rs->sr_text = txt;
1921                                 goto return_results;
1922                         }
1923                         bv.bv_val = addmod->sml_values[0].bv_val;
1924                         bv.bv_len = addmod->sml_values[0].bv_len;
1925                                 /* clear and discard the clear password */
1926                         memset(bv.bv_val, 0, bv.bv_len);
1927                         ber_memfree(bv.bv_val);
1928                         addmod->sml_values[0].bv_val = hpw.bv_val;
1929                         addmod->sml_values[0].bv_len = hpw.bv_len;
1930                 }
1931         }
1932         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1933         be_entry_release_r( op, e );
1934         return SLAP_CB_CONTINUE;
1935
1936 return_results:
1937         free_pwd_history_list( &tl );
1938         op->o_bd->bd_info = (BackendInfo *)on->on_info;
1939         be_entry_release_r( op, e );
1940         if ( send_ctrl ) {
1941                 LDAPControl **ctrls = NULL;
1942
1943                 ctrls = ch_calloc( sizeof( LDAPControl *) , 2 );
1944                 ctrls[0] = create_passcontrol( -1, -1, pErr );
1945                 ctrls[1] = NULL;
1946                 rs->sr_ctrls = ctrls;
1947         }
1948         send_ldap_result( op, rs );
1949         return rs->sr_err;
1950 }
1951
1952 static int
1953 ppolicy_parseCtrl(
1954         Operation *op,
1955         SlapReply *rs,
1956         LDAPControl *ctrl )
1957 {
1958         if ( ctrl->ldctl_value.bv_len ) {
1959                 rs->sr_text = "passwordPolicyRequest control value not empty";
1960                 return LDAP_PROTOCOL_ERROR;
1961         }
1962         op->o_ctrlflag[ppolicy_cid] = ctrl->ldctl_iscritical
1963                 ? SLAP_CONTROL_CRITICAL
1964                 : SLAP_CONTROL_NONCRITICAL;
1965
1966         return LDAP_SUCCESS;
1967 }
1968
1969 static int
1970 attrPretty(
1971         Syntax *syntax,
1972         struct berval *val,
1973         struct berval *out,
1974         void *ctx )
1975 {
1976         AttributeDescription *ad = NULL;
1977         const char *err;
1978         int code;
1979
1980         code = slap_bv2ad( val, &ad, &err );
1981         if ( !code ) {
1982                 ber_dupbv_x( out, &ad->ad_type->sat_cname, ctx );
1983         }
1984         return code;
1985 }
1986
1987 static int
1988 attrNormalize(
1989         slap_mask_t use,
1990         Syntax *syntax,
1991         MatchingRule *mr,
1992         struct berval *val,
1993         struct berval *out,
1994         void *ctx )
1995 {
1996         AttributeDescription *ad = NULL;
1997         const char *err;
1998         int code;
1999
2000         code = slap_bv2ad( val, &ad, &err );
2001         if ( !code ) {
2002                 ber_str2bv_x( ad->ad_type->sat_oid, 0, 1, out, ctx );
2003         }
2004         return code;
2005 }
2006
2007 static int
2008 ppolicy_db_init(
2009         BackendDB *be
2010 )
2011 {
2012         slap_overinst *on = (slap_overinst *) be->bd_info;
2013
2014         /* Has User Schema been initialized yet? */
2015         if ( !pwd_UsSchema[0].ad[0] ) {
2016                 const char *err;
2017                 int i, code;
2018
2019                 for (i=0; pwd_UsSchema[i].def; i++) {
2020                         code = slap_str2ad( pwd_UsSchema[i].def, pwd_UsSchema[i].ad, &err );
2021                         if ( code ) {
2022                                 fprintf( stderr, "User Schema Load failed %d: %s\n", code, err );
2023                                 return code;
2024                         }
2025                 }
2026                 {
2027                         Syntax *syn;
2028                         MatchingRule *mr;
2029
2030                         syn = ch_malloc( sizeof( Syntax ));
2031                         *syn = *ad_pwdAttribute->ad_type->sat_syntax;
2032                         syn->ssyn_pretty = attrPretty;
2033                         ad_pwdAttribute->ad_type->sat_syntax = syn;
2034
2035                         mr = ch_malloc( sizeof( MatchingRule ));
2036                         *mr = *ad_pwdAttribute->ad_type->sat_equality;
2037                         mr->smr_normalize = attrNormalize;
2038                         ad_pwdAttribute->ad_type->sat_equality = mr;
2039                 }
2040         }
2041
2042         on->on_bi.bi_private = ch_calloc( sizeof(pp_info), 1 );
2043
2044         if ( dtblsize && !pwcons )
2045                 pwcons = ch_calloc(sizeof(pw_conn), dtblsize );
2046
2047         return 0;
2048 }
2049
2050 static int
2051 ppolicy_db_open(
2052     BackendDB *be
2053 )
2054 {
2055         return overlay_register_control( be, LDAP_CONTROL_PASSWORDPOLICYREQUEST );
2056 }
2057
2058 static int
2059 ppolicy_close(
2060         BackendDB *be
2061 )
2062 {
2063         slap_overinst *on = (slap_overinst *) be->bd_info;
2064         pp_info *pi = on->on_bi.bi_private;
2065
2066         free( pwcons );
2067         free( pi->def_policy.bv_val );
2068         free( pi );
2069
2070         return 0;
2071 }
2072
2073 static char *extops[] = {
2074         LDAP_EXOP_MODIFY_PASSWD,
2075         NULL
2076 };
2077
2078 static slap_overinst ppolicy;
2079
2080 int ppolicy_initialize()
2081 {
2082         LDAPAttributeType *at;
2083         const char *err;
2084         int i, code;
2085
2086         for (i=0; pwd_OpSchema[i].def; i++) {
2087                 at = ldap_str2attributetype( pwd_OpSchema[i].def, &code, &err,
2088                         LDAP_SCHEMA_ALLOW_ALL );
2089                 if ( !at ) {
2090                         fprintf( stderr, "AttributeType Load failed %s %s\n",
2091                                 ldap_scherr2str(code), err );
2092                         return code;
2093                 }
2094                 code = at_add( at, 0, NULL, &err );
2095                 if ( !code ) {
2096                         slap_str2ad( at->at_names[0], pwd_OpSchema[i].ad, &err );
2097                 }
2098                 ldap_memfree( at );
2099                 if ( code ) {
2100                         fprintf( stderr, "AttributeType Load failed %s %s\n",
2101                                 scherr2str(code), err );
2102                         return code;
2103                 }
2104                 /* Allow Manager to set these as needed */
2105                 if ( is_at_no_user_mod( (*pwd_OpSchema[i].ad)->ad_type )) {
2106                         (*pwd_OpSchema[i].ad)->ad_type->sat_flags |=
2107                                 SLAP_AT_MANAGEABLE;
2108                 }
2109         }
2110
2111         code = register_supported_control( LDAP_CONTROL_PASSWORDPOLICYREQUEST,
2112                 SLAP_CTRL_ADD|SLAP_CTRL_BIND|SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE, extops,
2113                 ppolicy_parseCtrl, &ppolicy_cid );
2114         if ( code != LDAP_SUCCESS ) {
2115                 fprintf( stderr, "Failed to register control %d\n", code );
2116                 return code;
2117         }
2118
2119         ldap_pvt_thread_mutex_init( &chk_syntax_mutex );
2120
2121         ppolicy.on_bi.bi_type = "ppolicy";
2122         ppolicy.on_bi.bi_db_init = ppolicy_db_init;
2123         ppolicy.on_bi.bi_db_open = ppolicy_db_open;
2124         ppolicy.on_bi.bi_db_close = ppolicy_close;
2125
2126         ppolicy.on_bi.bi_op_add = ppolicy_add;
2127         ppolicy.on_bi.bi_op_bind = ppolicy_bind;
2128         ppolicy.on_bi.bi_op_compare = ppolicy_restrict;
2129         ppolicy.on_bi.bi_op_delete = ppolicy_restrict;
2130         ppolicy.on_bi.bi_op_modify = ppolicy_modify;
2131         ppolicy.on_bi.bi_op_search = ppolicy_restrict;
2132         ppolicy.on_bi.bi_connection_destroy = ppolicy_connection_destroy;
2133
2134         ppolicy.on_bi.bi_cf_ocs = ppolicyocs;
2135         code = config_register_schema( ppolicycfg, ppolicyocs );
2136         if ( code ) return code;
2137
2138         return overlay_register( &ppolicy );
2139 }
2140
2141 #if SLAPD_OVER_PPOLICY == SLAPD_MOD_DYNAMIC
2142 int init_module(int argc, char *argv[]) {
2143         return ppolicy_initialize();
2144 }
2145 #endif
2146
2147 #endif  /* defined(SLAPD_OVER_PPOLICY) */