git.sur5r.net Git - openldap/blob - contrib/slapd-modules/smbk5pwd/smbk5pwd.c

   1 /* smbk5pwd.c - Overlay for managing Samba and Heimdal passwords */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 2004-2005 by Howard Chu, Symas Corp.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /*
  16  * Support for table-driven configuration added by Pierangelo Masarati.
  17  * Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre.
  18  *
  19  * The conditions of the OpenLDAP Public License apply.
  20  */
  21
  22 #include <portable.h>
  23
  24 #ifndef SLAPD_OVER_SMBK5PWD
  25 #define SLAPD_OVER_SMBK5PWD SLAPD_MOD_DYNAMIC
  26 #endif
  27
  28 #ifdef SLAPD_OVER_SMBK5PWD
  29
  30 #include <slap.h>
  31 #include <ac/errno.h>
  32 #include <ac/string.h>
  33
  34 #include "config.h"
  35
  36 #ifdef DO_KRB5
  37 #include <lber.h>
  38 #include <lber_pvt.h>
  39 #include <lutil.h>
  40
  41 /* make ASN1_MALLOC_ENCODE use our allocator */
  42 #define malloc  ch_malloc
  43
  44 #include <krb5.h>
  45 #include <kadm5/admin.h>
  46 #include <hdb.h>
  47
  48 #ifndef HDB_INTERFACE_VERSION
  49 #define HDB_MASTER_KEY_SET      master_key_set
  50 #else
  51 #define HDB_MASTER_KEY_SET      hdb_master_key_set
  52 #endif
  53
  54 static krb5_context context;
  55 static void *kadm_context;
  56 static kadm5_config_params conf;
  57 static HDB *db;
  58
  59 static AttributeDescription *ad_krb5Key;
  60 static AttributeDescription *ad_krb5KeyVersionNumber;
  61 static AttributeDescription *ad_krb5PrincipalName;
  62 static AttributeDescription *ad_krb5ValidEnd;
  63 static ObjectClass *oc_krb5KDCEntry;
  64 #endif
  65
  66 #ifdef DO_SAMBA
  67 #include <openssl/des.h>
  68 #include <openssl/md4.h>
  69 #include "ldap_utf8.h"
  70
  71 static AttributeDescription *ad_sambaLMPassword;
  72 static AttributeDescription *ad_sambaNTPassword;
  73 static AttributeDescription *ad_sambaPwdLastSet;
  74 static AttributeDescription *ad_sambaPwdMustChange;
  75 static AttributeDescription *ad_sambaPwdCanChange;
  76 static ObjectClass *oc_sambaSamAccount;
  77 #endif
  78
  79 /* Per-instance configuration information */
  80 typedef struct smbk5pwd_t {
  81         unsigned        mode;
  82 #define SMBK5PWD_F_KRB5         (0x1U)
  83 #define SMBK5PWD_F_SAMBA        (0x2U)
  84
  85 #define SMBK5PWD_DO_KRB5(pi)    ((pi)->mode & SMBK5PWD_F_KRB5)
  86 #define SMBK5PWD_DO_SAMBA(pi)   ((pi)->mode & SMBK5PWD_F_SAMBA)
  87
  88 #ifdef DO_KRB5
  89         /* nothing yet */
  90 #endif
  91
  92 #ifdef DO_SAMBA
  93         /* How many seconds before forcing a password change? */
  94         time_t  smb_must_change;
  95         /* How many seconds after allowing a password change? */
  96         time_t  smb_can_change;
  97 #endif
  98 } smbk5pwd_t;
  99
 100 static const unsigned SMBK5PWD_F_ALL    =
 101         0
 102 #ifdef DO_KRB5
 103         | SMBK5PWD_F_KRB5
 104 #endif
 105 #ifdef DO_SAMBA
 106         | SMBK5PWD_F_SAMBA
 107 #endif
 108 ;
 109
 110 static int smbk5pwd_modules_init( smbk5pwd_t *pi );
 111
 112 #ifdef DO_SAMBA
 113 static const char hex[] = "0123456789abcdef";
 114
 115 /* From liblutil/passwd.c... */
 116 static void lmPasswd_to_key(
 117         const char *lmPasswd,
 118         DES_cblock *key)
 119 {
 120         const unsigned char *lpw = (const unsigned char *)lmPasswd;
 121         unsigned char *k = (unsigned char *)key;
 122
 123         /* make room for parity bits */
 124         k[0] = lpw[0];
 125         k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
 126         k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
 127         k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
 128         k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
 129         k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
 130         k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
 131         k[7] = ((lpw[6]&0x7F)<<1);
 132
 133         des_set_odd_parity( key );
 134 }
 135
 136 #define MAX_PWLEN 256
 137 #define HASHLEN 16
 138
 139 static void hexify(
 140         const char in[HASHLEN],
 141         struct berval *out
 142 )
 143 {
 144         int i;
 145         char *a;
 146         unsigned char *b;
 147
 148         out->bv_val = ch_malloc(HASHLEN*2 + 1);
 149         out->bv_len = HASHLEN*2;
 150
 151         a = out->bv_val;
 152         b = (unsigned char *)in;
 153         for (i=0; i<HASHLEN; i++) {
 154                 *a++ = hex[*b >> 4];
 155                 *a++ = hex[*b++ & 0x0f];
 156         }
 157         *a++ = '\0';
 158 }
 159
 160 static void lmhash(
 161         struct berval *passwd,
 162         struct berval *hash
 163 )
 164 {
 165         char UcasePassword[15];
 166         DES_cblock key;
 167         DES_key_schedule schedule;
 168         DES_cblock StdText = "KGS!@#$%";
 169         DES_cblock hbuf[2];
 170
 171         strncpy( UcasePassword, passwd->bv_val, 14 );
 172         UcasePassword[14] = '\0';
 173         ldap_pvt_str2upper( UcasePassword );
 174
 175         lmPasswd_to_key( UcasePassword, &key );
 176         des_set_key_unchecked( &key, schedule );
 177         des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
 178
 179         lmPasswd_to_key( &UcasePassword[7], &key );
 180         des_set_key_unchecked( &key, schedule );
 181         des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
 182
 183         hexify( (char *)hbuf, hash );
 184 }
 185
 186 static void nthash(
 187         struct berval *passwd,
 188         struct berval *hash
 189 )
 190 {
 191         /* Windows currently only allows 14 character passwords, but
 192          * may support up to 256 in the future. We assume this means
 193          * 256 UCS2 characters, not 256 bytes...
 194          */
 195         char hbuf[HASHLEN];
 196         MD4_CTX ctx;
 197
 198         if (passwd->bv_len > MAX_PWLEN*2)
 199                 passwd->bv_len = MAX_PWLEN*2;
 200
 201         MD4_Init( &ctx );
 202         MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
 203         MD4_Final( (unsigned char *)hbuf, &ctx );
 204
 205         hexify( hbuf, hash );
 206 }
 207 #endif /* DO_SAMBA */
 208
 209 #ifdef DO_KRB5
 210
 211 static int smbk5pwd_op_cleanup(
 212         Operation *op,
 213         SlapReply *rs )
 214 {
 215         slap_callback *cb;
 216
 217         /* clear out the current key */
 218         ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
 219                 NULL, 0, NULL, NULL );
 220
 221         /* free the callback */
 222         cb = op->o_callback;
 223         op->o_callback = cb->sc_next;
 224         op->o_tmpfree( cb, op->o_tmpmemctx );
 225         return 0;
 226 }
 227
 228 static int smbk5pwd_op_bind(
 229         Operation *op,
 230         SlapReply *rs )
 231 {
 232         /* If this is a simple Bind, stash the Op pointer so our chk
 233          * function can find it. Set a cleanup callback to clear it
 234          * out when the Bind completes.
 235          */
 236         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
 237                 slap_callback *cb;
 238                 ldap_pvt_thread_pool_setkey( op->o_threadctx,
 239                         smbk5pwd_op_cleanup, op, 0, NULL, NULL );
 240                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
 241                 cb->sc_cleanup = smbk5pwd_op_cleanup;
 242                 cb->sc_next = op->o_callback;
 243                 op->o_callback = cb;
 244         }
 245         return SLAP_CB_CONTINUE;
 246 }
 247
 248 static LUTIL_PASSWD_CHK_FUNC k5key_chk;
 249 static LUTIL_PASSWD_HASH_FUNC k5key_hash;
 250 static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
 251
 252 /* This password scheme stores no data in the userPassword attribute
 253  * other than the scheme name. It assumes the invoking entry is a
 254  * krb5KDCentry and compares the passed-in credentials against the
 255  * krb5Key attribute. The krb5Key may be multi-valued, but they are
 256  * simply multiple keytypes generated from the same input string, so
 257  * only the first value needs to be compared here.
 258  *
 259  * Since the lutil_passwd API doesn't pass the Entry object in, we
 260  * have to fetch it ourselves in order to get access to the other
 261  * attributes. We accomplish this with the help of the overlay's Bind
 262  * function, which stores the current Operation pointer in thread-specific
 263  * storage so we can retrieve it here. The Operation provides all
 264  * the necessary context for us to get Entry from the database.
 265  */
 266 static int k5key_chk(
 267         const struct berval *sc,
 268         const struct berval *passwd,
 269         const struct berval *cred,
 270         const char **text )
 271 {
 272         void *ctx, *op_tmp;
 273         Operation *op;
 274         int rc;
 275         Entry *e;
 276         Attribute *a;
 277         krb5_error_code ret;
 278         krb5_keyblock key;
 279         krb5_salt salt;
 280         hdb_entry ent;
 281
 282         /* Find our thread context, find our Operation */
 283         ctx = ldap_pvt_thread_pool_context();
 284
 285         if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, &op_tmp, NULL )
 286                  || !op_tmp )
 287                 return LUTIL_PASSWD_ERR;
 288         op = op_tmp;
 289
 290         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 291         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 292
 293         rc = LUTIL_PASSWD_ERR;
 294         do {
 295                 size_t l;
 296                 Key ekey = {0};
 297
 298                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 299                 if (!a ) break;
 300
 301                 memset( &ent, 0, sizeof(ent) );
 302                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 303                 if ( ret ) break;
 304
 305                 a = attr_find( e->e_attrs, ad_krb5ValidEnd );
 306                 if (a) {
 307                         struct lutil_tm tm;
 308                         struct lutil_timet tt;
 309                         if ( lutil_parsetime( a->a_vals[0].bv_val, &tm ) == 0 &&
 310                                 lutil_tm2time( &tm, &tt ) == 0 && tt.tt_usec < op->o_time ) {
 311                                 /* Account is expired */
 312                                 rc = LUTIL_PASSWD_ERR;
 313                                 break;
 314                         }
 315                 }
 316
 317                 krb5_get_pw_salt( context, ent.principal, &salt );
 318                 krb5_free_principal( context, ent.principal );
 319
 320                 a = attr_find( e->e_attrs, ad_krb5Key );
 321                 if ( !a ) break;
 322
 323                 ent.keys.len = 1;
 324                 ent.keys.val = &ekey;
 325                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 326                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 327                 if ( db->HDB_MASTER_KEY_SET )
 328                         hdb_unseal_keys( context, db, &ent );
 329
 330                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 331                         salt, &key );
 332
 333                 krb5_free_salt( context, salt );
 334
 335                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 336                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 337
 338                 krb5_free_keyblock_contents( context, &key );
 339                 krb5_free_keyblock_contents( context, &ekey.key );
 340
 341         } while(0);
 342         be_entry_release_r( op, e );
 343         return rc;
 344 }
 345
 346 static int k5key_hash(
 347         const struct berval *scheme,
 348         const struct berval *passwd,
 349         struct berval *hash,
 350         const char **text )
 351 {
 352         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 353         return LUTIL_PASSWD_OK;
 354 }
 355 #endif /* DO_KRB5 */
 356
 357 static int smbk5pwd_exop_passwd(
 358         Operation *op,
 359         SlapReply *rs )
 360 {
 361         int rc;
 362         req_pwdexop_s *qpw = &op->oq_pwdexop;
 363         Entry *e;
 364         Modifications *ml;
 365         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 366         smbk5pwd_t *pi = on->on_bi.bi_private;
 367         char term;
 368
 369         /* Not the operation we expected, pass it on... */
 370         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 371                 return SLAP_CB_CONTINUE;
 372         }
 373
 374         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 375         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 376         if ( rc != LDAP_SUCCESS ) return rc;
 377
 378         term = qpw->rs_new.bv_val[qpw->rs_new.bv_len];
 379         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0';
 380
 381 #ifdef DO_KRB5
 382         /* Kerberos stuff */
 383         do {
 384                 krb5_error_code ret;
 385                 hdb_entry ent;
 386                 struct berval *keys;
 387                 int kvno, i;
 388                 Attribute *a;
 389
 390                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 391
 392                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 393
 394                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 395                 if ( !a ) break;
 396
 397                 memset( &ent, 0, sizeof(ent) );
 398                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 399                 if ( ret ) break;
 400
 401                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 402                 kvno = 0;
 403                 if ( a ) {
 404                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 405                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 406                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 407                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 408                         }
 409
 410                 } else {
 411                         /* shouldn't happen, this is a required attr */
 412                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 413                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 414                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 415                 }
 416
 417                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 418                 hdb_seal_keys(context, db, &ent);
 419                 krb5_free_principal( context, ent.principal );
 420
 421                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 422
 423                 for (i = 0; i < ent.keys.len; i++) {
 424                         unsigned char *buf;
 425                         size_t len;
 426
 427                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 428                         if (ret != 0)
 429                                 break;
 430
 431                         keys[i].bv_val = (char *)buf;
 432                         keys[i].bv_len = len;
 433                 }
 434                 BER_BVZERO( &keys[i] );
 435
 436                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 437
 438                 if ( i != ent.keys.len ) {
 439                         ber_bvarray_free( keys );
 440                         break;
 441                 }
 442
 443                 ml = ch_malloc(sizeof(Modifications));
 444                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 445                 ml->sml_next = qpw->rs_mods;
 446                 qpw->rs_mods = ml;
 447
 448                 ml->sml_desc = ad_krb5Key;
 449                 ml->sml_op = LDAP_MOD_REPLACE;
 450 #ifdef SLAP_MOD_INTERNAL
 451                 ml->sml_flags = SLAP_MOD_INTERNAL;
 452 #endif
 453                 ml->sml_numvals = i;
 454                 ml->sml_values = keys;
 455                 ml->sml_nvalues = NULL;
 456
 457                 ml = ch_malloc(sizeof(Modifications));
 458                 ml->sml_next = qpw->rs_mods;
 459                 qpw->rs_mods = ml;
 460
 461                 ml->sml_desc = ad_krb5KeyVersionNumber;
 462                 ml->sml_op = LDAP_MOD_REPLACE;
 463 #ifdef SLAP_MOD_INTERNAL
 464                 ml->sml_flags = SLAP_MOD_INTERNAL;
 465 #endif
 466                 ml->sml_numvals = 1;
 467                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 468                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 469                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 470                         "%d", kvno+1 );
 471                 BER_BVZERO( &ml->sml_values[1] );
 472                 ml->sml_nvalues = NULL;
 473         } while ( 0 );
 474 #endif /* DO_KRB5 */
 475
 476 #ifdef DO_SAMBA
 477         /* Samba stuff */
 478         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 479                 struct berval *keys;
 480                 ber_len_t j,l;
 481                 wchar_t *wcs, wc;
 482                 char *c, *d;
 483                 struct berval pwd;
 484
 485                 /* Expand incoming UTF8 string to UCS4 */
 486                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 487                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 488
 489                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 490
 491                 /* Truncate UCS4 to UCS2 */
 492                 c = (char *)wcs;
 493                 for (j=0; j<l; j++) {
 494                         wc = wcs[j];
 495                         *c++ = wc & 0xff;
 496                         *c++ = (wc >> 8) & 0xff;
 497                 }
 498                 *c++ = 0;
 499                 pwd.bv_val = (char *)wcs;
 500                 pwd.bv_len = l * 2;
 501
 502                 ml = ch_malloc(sizeof(Modifications));
 503                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 504                 ml->sml_next = qpw->rs_mods;
 505                 qpw->rs_mods = ml;
 506
 507                 keys = ch_malloc( 2 * sizeof(struct berval) );
 508                 BER_BVZERO( &keys[1] );
 509                 nthash( &pwd, keys );
 510
 511                 ml->sml_desc = ad_sambaNTPassword;
 512                 ml->sml_op = LDAP_MOD_REPLACE;
 513 #ifdef SLAP_MOD_INTERNAL
 514                 ml->sml_flags = SLAP_MOD_INTERNAL;
 515 #endif
 516                 ml->sml_numvals = 1;
 517                 ml->sml_values = keys;
 518                 ml->sml_nvalues = NULL;
 519
 520                 /* Truncate UCS2 to 8-bit ASCII */
 521                 c = pwd.bv_val+1;
 522                 d = pwd.bv_val+2;
 523                 for (j=1; j<l; j++) {
 524                         *c++ = *d++;
 525                         d++;
 526                 }
 527                 pwd.bv_len /= 2;
 528                 pwd.bv_val[pwd.bv_len] = '\0';
 529
 530                 ml = ch_malloc(sizeof(Modifications));
 531                 ml->sml_next = qpw->rs_mods;
 532                 qpw->rs_mods = ml;
 533
 534                 keys = ch_malloc( 2 * sizeof(struct berval) );
 535                 BER_BVZERO( &keys[1] );
 536                 lmhash( &pwd, keys );
 537
 538                 ml->sml_desc = ad_sambaLMPassword;
 539                 ml->sml_op = LDAP_MOD_REPLACE;
 540 #ifdef SLAP_MOD_INTERNAL
 541                 ml->sml_flags = SLAP_MOD_INTERNAL;
 542 #endif
 543                 ml->sml_numvals = 1;
 544                 ml->sml_values = keys;
 545                 ml->sml_nvalues = NULL;
 546
 547                 ch_free(wcs);
 548
 549                 ml = ch_malloc(sizeof(Modifications));
 550                 ml->sml_next = qpw->rs_mods;
 551                 qpw->rs_mods = ml;
 552
 553                 keys = ch_malloc( 2 * sizeof(struct berval) );
 554                 keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 555                 keys[0].bv_len = snprintf(keys[0].bv_val,
 556                         LDAP_PVT_INTTYPE_CHARS(long),
 557                         "%ld", slap_get_time());
 558                 BER_BVZERO( &keys[1] );
 559
 560                 ml->sml_desc = ad_sambaPwdLastSet;
 561                 ml->sml_op = LDAP_MOD_REPLACE;
 562 #ifdef SLAP_MOD_INTERNAL
 563                 ml->sml_flags = SLAP_MOD_INTERNAL;
 564 #endif
 565                 ml->sml_numvals = 1;
 566                 ml->sml_values = keys;
 567                 ml->sml_nvalues = NULL;
 568
 569                 if (pi->smb_must_change)
 570                 {
 571                         ml = ch_malloc(sizeof(Modifications));
 572                         ml->sml_next = qpw->rs_mods;
 573                         qpw->rs_mods = ml;
 574
 575                         keys = ch_malloc( 2 * sizeof(struct berval) );
 576                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 577                         keys[0].bv_len = snprintf(keys[0].bv_val,
 578                                         LDAP_PVT_INTTYPE_CHARS(long),
 579                                         "%ld", slap_get_time() + pi->smb_must_change);
 580                         BER_BVZERO( &keys[1] );
 581
 582                         ml->sml_desc = ad_sambaPwdMustChange;
 583                         ml->sml_op = LDAP_MOD_REPLACE;
 584 #ifdef SLAP_MOD_INTERNAL
 585                         ml->sml_flags = SLAP_MOD_INTERNAL;
 586 #endif
 587                         ml->sml_numvals = 1;
 588                         ml->sml_values = keys;
 589                         ml->sml_nvalues = NULL;
 590                 }
 591
 592                 if (pi->smb_can_change)
 593                 {
 594                         ml = ch_malloc(sizeof(Modifications));
 595                         ml->sml_next = qpw->rs_mods;
 596                         qpw->rs_mods = ml;
 597
 598                         keys = ch_malloc( 2 * sizeof(struct berval) );
 599                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 600                         keys[0].bv_len = snprintf(keys[0].bv_val,
 601                                         LDAP_PVT_INTTYPE_CHARS(long),
 602                                         "%ld", slap_get_time() + pi->smb_can_change);
 603                         BER_BVZERO( &keys[1] );
 604
 605                         ml->sml_desc = ad_sambaPwdCanChange;
 606                         ml->sml_op = LDAP_MOD_REPLACE;
 607 #ifdef SLAP_MOD_INTERNAL
 608                         ml->sml_flags = SLAP_MOD_INTERNAL;
 609 #endif
 610                         ml->sml_numvals = 1;
 611                         ml->sml_values = keys;
 612                         ml->sml_nvalues = NULL;
 613                 }
 614         }
 615 #endif /* DO_SAMBA */
 616         be_entry_release_r( op, e );
 617         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term;
 618
 619         return SLAP_CB_CONTINUE;
 620 }
 621
 622 static slap_overinst smbk5pwd;
 623
 624 /* back-config stuff */
 625 enum {
 626         PC_SMB_MUST_CHANGE = 1,
 627         PC_SMB_CAN_CHANGE,
 628         PC_SMB_ENABLE
 629 };
 630
 631 static ConfigDriver smbk5pwd_cf_func;
 632
 633 /*
 634  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 635  */
 636
 637 static ConfigTable smbk5pwd_cfats[] = {
 638         { "smbk5pwd-enable", "arg",
 639                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 640                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 641                 "DESC 'Modules to be enabled' "
 642                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 643         { "smbk5pwd-must-change", "time",
 644                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 645                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 646                 "DESC 'Credentials validity interval' "
 647                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 648         { "smbk5pwd-can-change", "time",
 649                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 650                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 651                 "DESC 'Credentials minimum validity interval' "
 652                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 653
 654         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 655 };
 656
 657 static ConfigOCs smbk5pwd_cfocs[] = {
 658         { "( OLcfgCtOc:1.1 "
 659                 "NAME 'olcSmbK5PwdConfig' "
 660                 "DESC 'smbk5pwd overlay configuration' "
 661                 "SUP olcOverlayConfig "
 662                 "MAY ( "
 663                         "olcSmbK5PwdEnable "
 664                         "$ olcSmbK5PwdMustChange "
 665                         "$ olcSmbK5PwdCanChange "
 666                 ") )", Cft_Overlay, smbk5pwd_cfats },
 667
 668         { NULL, 0, NULL }
 669 };
 670
 671 /*
 672  * add here other functionalities; handle their initialization
 673  * as appropriate in smbk5pwd_modules_init().
 674  */
 675 static slap_verbmasks smbk5pwd_modules[] = {
 676         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 677         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 678         { BER_BVNULL,                   -1 }
 679 };
 680
 681 static int
 682 smbk5pwd_cf_func( ConfigArgs *c )
 683 {
 684         slap_overinst   *on = (slap_overinst *)c->bi;
 685
 686         int             rc = 0;
 687         smbk5pwd_t      *pi = on->on_bi.bi_private;
 688
 689         if ( c->op == SLAP_CONFIG_EMIT ) {
 690                 switch( c->type ) {
 691                 case PC_SMB_MUST_CHANGE:
 692 #ifdef DO_SAMBA
 693                         c->value_int = pi->smb_must_change;
 694 #else /* ! DO_SAMBA */
 695                         c->value_int = 0;
 696 #endif /* ! DO_SAMBA */
 697                         break;
 698
 699                 case PC_SMB_CAN_CHANGE:
 700 #ifdef DO_SAMBA
 701                         c->value_int = pi->smb_can_change;
 702 #else /* ! DO_SAMBA */
 703                         c->value_int = 0;
 704 #endif /* ! DO_SAMBA */
 705                         break;
 706
 707                 case PC_SMB_ENABLE:
 708                         c->rvalue_vals = NULL;
 709                         if ( pi->mode ) {
 710                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 711                                 if ( c->rvalue_vals == NULL ) {
 712                                         rc = 1;
 713                                 }
 714                         }
 715                         break;
 716
 717                 default:
 718                         assert( 0 );
 719                         rc = 1;
 720                 }
 721                 return rc;
 722
 723         } else if ( c->op == LDAP_MOD_DELETE ) {
 724                 switch( c->type ) {
 725                 case PC_SMB_MUST_CHANGE:
 726                         break;
 727
 728                 case PC_SMB_CAN_CHANGE:
 729                         break;
 730
 731                 case PC_SMB_ENABLE:
 732                         if ( !c->line ) {
 733                                 pi->mode = 0;
 734
 735                         } else {
 736                                 slap_mask_t     m;
 737
 738                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 739                                 pi->mode &= ~m;
 740                         }
 741                         break;
 742
 743                 default:
 744                         assert( 0 );
 745                         rc = 1;
 746                 }
 747                 return rc;
 748         }
 749
 750         switch( c->type ) {
 751         case PC_SMB_MUST_CHANGE:
 752 #ifdef DO_SAMBA
 753                 if ( c->value_int < 0 ) {
 754                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 755                                 "<%s> invalid negative value \"%d\".",
 756                                 c->log, c->argv[ 0 ], 0 );
 757                         return 1;
 758                 }
 759                 pi->smb_must_change = c->value_int;
 760 #else /* ! DO_SAMBA */
 761                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 762                         "<%s> only meaningful "
 763                         "when compiled with -DDO_SAMBA.\n",
 764                         c->log, c->argv[ 0 ], 0 );
 765                 return 1;
 766 #endif /* ! DO_SAMBA */
 767                 break;
 768
 769         case PC_SMB_CAN_CHANGE:
 770 #ifdef DO_SAMBA
 771                 if ( c->value_int < 0 ) {
 772                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 773                                 "<%s> invalid negative value \"%d\".",
 774                                 c->log, c->argv[ 0 ], 0 );
 775                         return 1;
 776                 }
 777                 pi->smb_can_change = c->value_int;
 778 #else /* ! DO_SAMBA */
 779                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 780                         "<%s> only meaningful "
 781                         "when compiled with -DDO_SAMBA.\n",
 782                         c->log, c->argv[ 0 ], 0 );
 783                 return 1;
 784 #endif /* ! DO_SAMBA */
 785                 break;
 786
 787         case PC_SMB_ENABLE: {
 788                 slap_mask_t     mode = pi->mode, m;
 789
 790                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 791                 if ( rc > 0 ) {
 792                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 793                                 "<%s> unknown module \"%s\".\n",
 794                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 795                         return 1;
 796                 }
 797
 798                 /* we can hijack the smbk5pwd_t structure because
 799                  * from within the configuration, this is the only
 800                  * active thread. */
 801                 pi->mode |= m;
 802
 803 #ifndef DO_KRB5
 804                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 805                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 806                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 807                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 808                         pi->mode = mode;
 809                         return 1;
 810                 }
 811 #endif /* ! DO_KRB5 */
 812
 813 #ifndef DO_SAMBA
 814                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 815                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 816                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 817                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 818                         pi->mode = mode;
 819                         return 1;
 820                 }
 821 #endif /* ! DO_SAMBA */
 822
 823                 {
 824                         BackendDB       db = *c->be;
 825
 826                         /* Re-initialize the module, because
 827                          * the configuration might have changed */
 828                         db.bd_info = (BackendInfo *)on;
 829                         rc = smbk5pwd_modules_init( pi );
 830                         if ( rc ) {
 831                                 pi->mode = mode;
 832                                 return 1;
 833                         }
 834                 }
 835
 836                 } break;
 837
 838         default:
 839                 assert( 0 );
 840                 return 1;
 841         }
 842         return rc;
 843 }
 844
 845 static int
 846 smbk5pwd_modules_init( smbk5pwd_t *pi )
 847 {
 848         static struct {
 849                 const char              *name;
 850                 AttributeDescription    **adp;
 851         }
 852 #ifdef DO_KRB5
 853         krb5_ad[] = {
 854                 { "krb5Key",                    &ad_krb5Key },
 855                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 856                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 857                 { "krb5ValidEnd",               &ad_krb5ValidEnd },
 858                 { NULL }
 859         },
 860 #endif /* DO_KRB5 */
 861 #ifdef DO_SAMBA
 862         samba_ad[] = {
 863                 { "sambaLMPassword",            &ad_sambaLMPassword },
 864                 { "sambaNTPassword",            &ad_sambaNTPassword },
 865                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 866                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 867                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 868                 { NULL }
 869         },
 870 #endif /* DO_SAMBA */
 871         dummy_ad;
 872
 873         /* this is to silence the unused var warning */
 874         dummy_ad.name = NULL;
 875
 876 #ifdef DO_KRB5
 877         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 878                 krb5_error_code ret;
 879                 extern HDB      *_kadm5_s_get_db(void *);
 880
 881                 int             i, rc;
 882
 883                 /* Make sure all of our necessary schema items are loaded */
 884                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 885                 if ( !oc_krb5KDCEntry ) {
 886                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 887                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 888                                 0, 0, 0 );
 889                         return -1;
 890                 }
 891
 892                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 893                         const char      *text;
 894
 895                         *(krb5_ad[ i ].adp) = NULL;
 896
 897                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 898                         if ( rc != LDAP_SUCCESS ) {
 899                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 900                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 901                                         krb5_ad[ i ].name, text, rc );
 902                                 oc_krb5KDCEntry = NULL;
 903                                 return rc;
 904                         }
 905                 }
 906
 907                 /* Initialize Kerberos context */
 908                 ret = krb5_init_context(&context);
 909                 if (ret) {
 910                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 911                                 "unable to initialize krb5 context (%d).\n",
 912                                 ret, 0, 0 );
 913                         oc_krb5KDCEntry = NULL;
 914                         return -1;
 915                 }
 916
 917                 ret = kadm5_s_init_with_password_ctx( context,
 918                         KADM5_ADMIN_SERVICE,
 919                         NULL,
 920                         KADM5_ADMIN_SERVICE,
 921                         &conf, 0, 0, &kadm_context );
 922                 if (ret) {
 923                         char *err_str, *err_msg = "<unknown error>";
 924                         err_str = krb5_get_error_string( context );
 925                         if (!err_str)
 926                                 err_msg = (char *)krb5_get_err_text( context, ret );
 927                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 928                                 "unable to initialize krb5 admin context: %s (%d).\n",
 929                                 err_str ? err_str : err_msg, ret, 0 );
 930                         if (err_str)
 931                                 krb5_free_error_string( context, err_str );
 932                         krb5_free_context( context );
 933                         oc_krb5KDCEntry = NULL;
 934                         return -1;
 935                 }
 936
 937                 db = _kadm5_s_get_db( kadm_context );
 938         }
 939 #endif /* DO_KRB5 */
 940
 941 #ifdef DO_SAMBA
 942         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 943                 int             i, rc;
 944
 945                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 946                 if ( !oc_sambaSamAccount ) {
 947                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 948                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 949                                 0, 0, 0 );
 950                         return -1;
 951                 }
 952
 953                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 954                         const char      *text;
 955
 956                         *(samba_ad[ i ].adp) = NULL;
 957
 958                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 959                         if ( rc != LDAP_SUCCESS ) {
 960                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 961                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 962                                         samba_ad[ i ].name, text, rc );
 963                                 oc_sambaSamAccount = NULL;
 964                                 return rc;
 965                         }
 966                 }
 967         }
 968 #endif /* DO_SAMBA */
 969
 970         return 0;
 971 }
 972
 973 static int
 974 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
 975 {
 976         slap_overinst   *on = (slap_overinst *)be->bd_info;
 977         smbk5pwd_t      *pi;
 978
 979         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 980         if ( pi == NULL ) {
 981                 return 1;
 982         }
 983         on->on_bi.bi_private = (void *)pi;
 984
 985         return 0;
 986 }
 987
 988 static int
 989 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
 990 {
 991         slap_overinst   *on = (slap_overinst *)be->bd_info;
 992         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 993
 994         int     rc;
 995
 996         if ( pi->mode == 0 ) {
 997                 pi->mode = SMBK5PWD_F_ALL;
 998         }
 999
1000         rc = smbk5pwd_modules_init( pi );
1001         if ( rc ) {
1002                 return rc;
1003         }
1004
1005         return 0;
1006 }
1007
1008 static int
1009 smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
1010 {
1011         slap_overinst   *on = (slap_overinst *)be->bd_info;
1012         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
1013
1014         if ( pi ) {
1015                 ch_free( pi );
1016         }
1017
1018         return 0;
1019 }
1020
1021 int
1022 smbk5pwd_initialize(void)
1023 {
1024         int             rc;
1025
1026         smbk5pwd.on_bi.bi_type = "smbk5pwd";
1027
1028         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1029         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1030         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1031
1032         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1033
1034 #ifdef DO_KRB5
1035         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1036
1037         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1038 #endif
1039
1040         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1041
1042         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1043         if ( rc ) {
1044                 return rc;
1045         }
1046
1047         return overlay_register( &smbk5pwd );
1048 }
1049
1050 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1051 int init_module(int argc, char *argv[]) {
1052         return smbk5pwd_initialize();
1053 }
1054 #endif
1055
1056 #endif /* defined(SLAPD_OVER_SMBK5PWD) */