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 sambaPwdMustChange added by Marco D'Ettorre.
  17  * Support for table-driven configuration added by Pierangelo Masarati.
  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 ObjectClass *oc_krb5KDCEntry;
  63 #endif
  64
  65 #ifdef DO_SAMBA
  66 #include <openssl/des.h>
  67 #include <openssl/md4.h>
  68 #include "ldap_utf8.h"
  69
  70 static AttributeDescription *ad_sambaLMPassword;
  71 static AttributeDescription *ad_sambaNTPassword;
  72 static AttributeDescription *ad_sambaPwdLastSet;
  73 static AttributeDescription *ad_sambaPwdMustChange;
  74 static ObjectClass *oc_sambaSamAccount;
  75 #endif
  76
  77 /* Per-instance configuration information */
  78 typedef struct smbk5pwd_t {
  79         unsigned        mode;
  80 #define SMBK5PWD_F_KRB5         (0x1U)
  81 #define SMBK5PWD_F_SAMBA        (0x2U)
  82
  83 #define SMBK5PWD_DO_KRB5(pi)    ((pi)->mode & SMBK5PWD_F_KRB5)
  84 #define SMBK5PWD_DO_SAMBA(pi)   ((pi)->mode & SMBK5PWD_F_SAMBA)
  85
  86 #ifdef DO_KRB5
  87         /* nothing yet */
  88 #endif
  89
  90 #ifdef DO_SAMBA
  91         /* How many seconds before forcing a password change? */
  92         time_t  smb_must_change;
  93 #endif
  94 } smbk5pwd_t;
  95
  96 static const unsigned SMBK5PWD_F_ALL    =
  97         0
  98 #ifdef DO_KRB5
  99         | SMBK5PWD_F_KRB5
 100 #endif
 101 #ifdef DO_SAMBA
 102         | SMBK5PWD_F_SAMBA
 103 #endif
 104 ;
 105
 106 static int smbk5pwd_modules_init( smbk5pwd_t *pi );
 107
 108 #ifdef DO_SAMBA
 109 static const char hex[] = "0123456789abcdef";
 110
 111 /* From liblutil/passwd.c... */
 112 static void lmPasswd_to_key(
 113         const char *lmPasswd,
 114         des_cblock *key)
 115 {
 116         const unsigned char *lpw = (const unsigned char *)lmPasswd;
 117         unsigned char *k = (unsigned char *)key;
 118
 119         /* make room for parity bits */
 120         k[0] = lpw[0];
 121         k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
 122         k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
 123         k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
 124         k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
 125         k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
 126         k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
 127         k[7] = ((lpw[6]&0x7F)<<1);
 128
 129         des_set_odd_parity( key );
 130 }
 131
 132 #define MAX_PWLEN 256
 133 #define HASHLEN 16
 134
 135 static void hexify(
 136         const char in[HASHLEN],
 137         struct berval *out
 138 )
 139 {
 140         int i;
 141         char *a;
 142         unsigned char *b;
 143
 144         out->bv_val = ch_malloc(HASHLEN*2 + 1);
 145         out->bv_len = HASHLEN*2;
 146
 147         a = out->bv_val;
 148         b = (unsigned char *)in;
 149         for (i=0; i<HASHLEN; i++) {
 150                 *a++ = hex[*b >> 4];
 151                 *a++ = hex[*b++ & 0x0f];
 152         }
 153         *a++ = '\0';
 154 }
 155
 156 static void lmhash(
 157         struct berval *passwd,
 158         struct berval *hash
 159 )
 160 {
 161         char UcasePassword[15];
 162         des_cblock key;
 163         des_key_schedule schedule;
 164         des_cblock StdText = "KGS!@#$%";
 165         des_cblock hbuf[2];
 166
 167         strncpy( UcasePassword, passwd->bv_val, 14 );
 168         UcasePassword[14] = '\0';
 169         ldap_pvt_str2upper( UcasePassword );
 170
 171         lmPasswd_to_key( UcasePassword, &key );
 172         des_set_key_unchecked( &key, schedule );
 173         des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
 174
 175         lmPasswd_to_key( &UcasePassword[7], &key );
 176         des_set_key_unchecked( &key, schedule );
 177         des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
 178
 179         hexify( (char *)hbuf, hash );
 180 }
 181
 182 static void nthash(
 183         struct berval *passwd,
 184         struct berval *hash
 185 )
 186 {
 187         /* Windows currently only allows 14 character passwords, but
 188          * may support up to 256 in the future. We assume this means
 189          * 256 UCS2 characters, not 256 bytes...
 190          */
 191         char hbuf[HASHLEN];
 192         MD4_CTX ctx;
 193
 194         if (passwd->bv_len > MAX_PWLEN*2)
 195                 passwd->bv_len = MAX_PWLEN*2;
 196
 197         MD4_Init( &ctx );
 198         MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
 199         MD4_Final( (unsigned char *)hbuf, &ctx );
 200
 201         hexify( hbuf, hash );
 202 }
 203 #endif /* DO_SAMBA */
 204
 205 #ifdef DO_KRB5
 206
 207 static int smbk5pwd_op_cleanup(
 208         Operation *op,
 209         SlapReply *rs )
 210 {
 211         slap_callback *cb;
 212
 213         /* clear out the current key */
 214         ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
 215                 NULL, NULL );
 216
 217         /* free the callback */
 218         cb = op->o_callback;
 219         op->o_callback = cb->sc_next;
 220         op->o_tmpfree( cb, op->o_tmpmemctx );
 221         return 0;
 222 }
 223
 224 static int smbk5pwd_op_bind(
 225         Operation *op,
 226         SlapReply *rs )
 227 {
 228         /* If this is a simple Bind, stash the Op pointer so our chk
 229          * function can find it. Set a cleanup callback to clear it
 230          * out when the Bind completes.
 231          */
 232         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
 233                 slap_callback *cb;
 234                 ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup, op,
 235                         NULL );
 236                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
 237                 cb->sc_cleanup = smbk5pwd_op_cleanup;
 238                 cb->sc_next = op->o_callback;
 239                 op->o_callback = cb;
 240         }
 241         return SLAP_CB_CONTINUE;
 242 }
 243
 244 static LUTIL_PASSWD_CHK_FUNC k5key_chk;
 245 static LUTIL_PASSWD_HASH_FUNC k5key_hash;
 246 static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
 247
 248 /* This password scheme stores no data in the userPassword attribute
 249  * other than the scheme name. It assumes the invoking entry is a
 250  * krb5KDCentry and compares the passed-in credentials against the
 251  * krb5Key attribute. The krb5Key may be multi-valued, but they are
 252  * simply multiple keytypes generated from the same input string, so
 253  * only the first value needs to be compared here.
 254  *
 255  * Since the lutil_passwd API doesn't pass the Entry object in, we
 256  * have to fetch it ourselves in order to get access to the other
 257  * attributes. We accomplish this with the help of the overlay's Bind
 258  * function, which stores the current Operation pointer in thread-specific
 259  * storage so we can retrieve it here. The Operation provides all
 260  * the necessary context for us to get Entry from the database.
 261  */
 262 static int k5key_chk(
 263         const struct berval *sc,
 264         const struct berval *passwd,
 265         const struct berval *cred,
 266         const char **text )
 267 {
 268         void *ctx;
 269         Operation *op;
 270         int rc;
 271         Entry *e;
 272         Attribute *a;
 273     krb5_error_code ret;
 274     krb5_keyblock key;
 275     krb5_salt salt;
 276         hdb_entry ent;
 277
 278         /* Find our thread context, find our Operation */
 279         ctx = ldap_pvt_thread_pool_context();
 280
 281         if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, (void **)&op, NULL ) ||
 282                 !op )
 283                 return LUTIL_PASSWD_ERR;
 284
 285         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 286         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 287
 288         rc = LUTIL_PASSWD_ERR;
 289         do {
 290                 size_t l;
 291                 Key ekey = {0};
 292
 293                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 294                 if (!a ) break;
 295
 296                 memset( &ent, 0, sizeof(ent) );
 297                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 298                 if ( ret ) break;
 299                 krb5_get_pw_salt( context, ent.principal, &salt );
 300                 krb5_free_principal( context, ent.principal );
 301
 302                 a = attr_find( e->e_attrs, ad_krb5Key );
 303                 if ( !a ) break;
 304
 305                 ent.keys.len = 1;
 306                 ent.keys.val = &ekey;
 307                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 308                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 309                 if ( db->HDB_MASTER_KEY_SET )
 310                         hdb_unseal_keys( context, db, &ent );
 311
 312                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 313                         salt, &key );
 314
 315                 krb5_free_salt( context, salt );
 316
 317                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 318                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 319
 320                 krb5_free_keyblock_contents( context, &key );
 321                 krb5_free_keyblock_contents( context, &ekey.key );
 322
 323         } while(0);
 324         be_entry_release_r( op, e );
 325         return rc;
 326 }
 327
 328 static int k5key_hash(
 329         const struct berval *scheme,
 330         const struct berval *passwd,
 331         struct berval *hash,
 332         const char **text )
 333 {
 334         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 335         return LUTIL_PASSWD_OK;
 336 }
 337 #endif /* DO_KRB5 */
 338
 339 static int smbk5pwd_exop_passwd(
 340         Operation *op,
 341         SlapReply *rs )
 342 {
 343         int rc;
 344         req_pwdexop_s *qpw = &op->oq_pwdexop;
 345         Entry *e;
 346         Modifications *ml;
 347         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 348         smbk5pwd_t *pi = on->on_bi.bi_private;
 349
 350         /* Not the operation we expected, pass it on... */
 351         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 352                 return SLAP_CB_CONTINUE;
 353         }
 354
 355         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 356         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 357         if ( rc != LDAP_SUCCESS ) return rc;
 358
 359 #ifdef DO_KRB5
 360         /* Kerberos stuff */
 361         do {
 362                 krb5_error_code ret;
 363                 hdb_entry ent;
 364                 struct berval *keys;
 365                 int kvno, i;
 366                 Attribute *a;
 367
 368                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 369
 370                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 371
 372                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 373                 if ( !a ) break;
 374
 375                 memset( &ent, 0, sizeof(ent) );
 376                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 377                 if ( ret ) break;
 378
 379                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 380                 kvno = 0;
 381                 if ( a ) {
 382                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 383                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 384                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 385                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 386                         }
 387
 388                 } else {
 389                         /* shouldn't happen, this is a required attr */
 390                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 391                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 392                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 393                 }
 394
 395                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 396                 hdb_seal_keys(context, db, &ent);
 397                 krb5_free_principal( context, ent.principal );
 398
 399                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 400
 401                 for (i = 0; i < ent.keys.len; i++) {
 402                         unsigned char *buf;
 403                         size_t len;
 404
 405                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 406                         if (ret != 0)
 407                                 break;
 408
 409                         keys[i].bv_val = (char *)buf;
 410                         keys[i].bv_len = len;
 411                 }
 412                 BER_BVZERO( &keys[i] );
 413
 414                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 415
 416                 if ( i != ent.keys.len ) {
 417                         ber_bvarray_free( keys );
 418                         break;
 419                 }
 420
 421                 ml = ch_malloc(sizeof(Modifications));
 422                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 423                 ml->sml_next = qpw->rs_mods;
 424                 qpw->rs_mods = ml;
 425
 426                 ml->sml_desc = ad_krb5Key;
 427                 ml->sml_op = LDAP_MOD_REPLACE;
 428 #ifdef SLAP_MOD_INTERNAL
 429                 ml->sml_flags = SLAP_MOD_INTERNAL;
 430 #endif
 431                 ml->sml_values = keys;
 432                 ml->sml_nvalues = NULL;
 433
 434                 ml = ch_malloc(sizeof(Modifications));
 435                 ml->sml_next = qpw->rs_mods;
 436                 qpw->rs_mods = ml;
 437
 438                 ml->sml_desc = ad_krb5KeyVersionNumber;
 439                 ml->sml_op = LDAP_MOD_REPLACE;
 440 #ifdef SLAP_MOD_INTERNAL
 441                 ml->sml_flags = SLAP_MOD_INTERNAL;
 442 #endif
 443                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 444                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 445                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 446                         "%d", kvno+1 );
 447                 BER_BVZERO( &ml->sml_values[1] );
 448                 ml->sml_nvalues = NULL;
 449         } while ( 0 );
 450 #endif /* DO_KRB5 */
 451
 452 #ifdef DO_SAMBA
 453         /* Samba stuff */
 454         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 455                 struct berval *keys;
 456                 ber_len_t j,l;
 457                 wchar_t *wcs, wc;
 458                 char *c, *d;
 459                 struct berval pwd;
 460
 461                 /* Expand incoming UTF8 string to UCS4 */
 462                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 463                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 464
 465                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 466
 467                 /* Truncate UCS4 to UCS2 */
 468                 c = (char *)wcs;
 469                 for (j=0; j<l; j++) {
 470                         wc = wcs[j];
 471                         *c++ = wc & 0xff;
 472                         *c++ = (wc >> 8) & 0xff;
 473                 }
 474                 *c++ = 0;
 475                 pwd.bv_val = (char *)wcs;
 476                 pwd.bv_len = l * 2;
 477
 478                 ml = ch_malloc(sizeof(Modifications));
 479                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 480                 ml->sml_next = qpw->rs_mods;
 481                 qpw->rs_mods = ml;
 482
 483                 keys = ch_malloc( 2 * sizeof(struct berval) );
 484                 BER_BVZERO( &keys[1] );
 485                 nthash( &pwd, keys );
 486
 487                 ml->sml_desc = ad_sambaNTPassword;
 488                 ml->sml_op = LDAP_MOD_REPLACE;
 489 #ifdef SLAP_MOD_INTERNAL
 490                 ml->sml_flags = SLAP_MOD_INTERNAL;
 491 #endif
 492                 ml->sml_values = keys;
 493                 ml->sml_nvalues = NULL;
 494
 495                 /* Truncate UCS2 to 8-bit ASCII */
 496                 c = pwd.bv_val+1;
 497                 d = pwd.bv_val+2;
 498                 for (j=1; j<l; j++) {
 499                         *c++ = *d++;
 500                         d++;
 501                 }
 502                 pwd.bv_len /= 2;
 503                 pwd.bv_val[pwd.bv_len] = '\0';
 504
 505                 ml = ch_malloc(sizeof(Modifications));
 506                 ml->sml_next = qpw->rs_mods;
 507                 qpw->rs_mods = ml;
 508
 509                 keys = ch_malloc( 2 * sizeof(struct berval) );
 510                 BER_BVZERO( &keys[1] );
 511                 lmhash( &pwd, keys );
 512
 513                 ml->sml_desc = ad_sambaLMPassword;
 514                 ml->sml_op = LDAP_MOD_REPLACE;
 515 #ifdef SLAP_MOD_INTERNAL
 516                 ml->sml_flags = SLAP_MOD_INTERNAL;
 517 #endif
 518                 ml->sml_values = keys;
 519                 ml->sml_nvalues = NULL;
 520
 521                 ch_free(wcs);
 522
 523                 ml = ch_malloc(sizeof(Modifications));
 524                 ml->sml_next = qpw->rs_mods;
 525                 qpw->rs_mods = ml;
 526
 527                 keys = ch_malloc( 2 * sizeof(struct berval) );
 528                 keys[0].bv_val = ch_malloc( STRLENOF( "9223372036854775807L" ) + 1 );
 529                 keys[0].bv_len = snprintf(keys[0].bv_val,
 530                         STRLENOF( "9223372036854775807L" ) + 1,
 531                         "%ld", slap_get_time());
 532                 BER_BVZERO( &keys[1] );
 533
 534                 ml->sml_desc = ad_sambaPwdLastSet;
 535                 ml->sml_op = LDAP_MOD_REPLACE;
 536 #ifdef SLAP_MOD_INTERNAL
 537                 ml->sml_flags = SLAP_MOD_INTERNAL;
 538 #endif
 539                 ml->sml_values = keys;
 540                 ml->sml_nvalues = NULL;
 541
 542                 if (pi->smb_must_change)
 543                 {
 544                         ml = ch_malloc(sizeof(Modifications));
 545                         ml->sml_next = qpw->rs_mods;
 546                         qpw->rs_mods = ml;
 547
 548                         keys = ch_malloc( 2 * sizeof(struct berval) );
 549                         keys[0].bv_val = ch_malloc( STRLENOF( "9223372036854775807L" ) + 1 );
 550                         keys[0].bv_len = snprintf(keys[0].bv_val,
 551                                         STRLENOF( "9223372036854775807L" ) + 1,
 552                                         "%ld", slap_get_time() + pi->smb_must_change);
 553                         BER_BVZERO( &keys[1] );
 554
 555                         ml->sml_desc = ad_sambaPwdMustChange;
 556                         ml->sml_op = LDAP_MOD_REPLACE;
 557 #ifdef SLAP_MOD_INTERNAL
 558                         ml->sml_flags = SLAP_MOD_INTERNAL;
 559 #endif
 560                         ml->sml_values = keys;
 561                         ml->sml_nvalues = NULL;
 562                 }
 563         }
 564 #endif /* DO_SAMBA */
 565         be_entry_release_r( op, e );
 566
 567         return SLAP_CB_CONTINUE;
 568 }
 569
 570 static slap_overinst smbk5pwd;
 571
 572 /* back-config stuff */
 573 enum {
 574         PC_SMB_MUST_CHANGE = 1,
 575         PC_SMB_ENABLE
 576 };
 577
 578 static ConfigDriver smbk5pwd_cf_func;
 579
 580 /*
 581  * NOTE: uses OID arcs OLcfgOvAt:6 and OLcfgOvOc:6
 582  */
 583
 584 static ConfigTable smbk5pwd_cfats[] = {
 585         { "smbk5pwd-enable", "arg",
 586                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 587                 "( OLcfgOvAt:6.1 NAME 'olcSmbK5PwdEnable' "
 588                 "DESC 'Modules to be enabled' "
 589                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 590         { "smbk5pwd-must-change", "time",
 591                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 592                 "( OLcfgOvAt:6.2 NAME 'olcSmbK5PwdMustChange' "
 593                 "DESC 'Credentials validity interval' "
 594                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 595
 596         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 597 };
 598
 599 static ConfigOCs smbk5pwd_cfocs[] = {
 600         { "( OLcfgOvOc:6.1 "
 601                 "NAME 'olcSmbK5PwdConfig' "
 602                 "DESC 'smbk5pwd overlay configuration' "
 603                 "SUP olcOverlayConfig "
 604                 "MAY ( "
 605                         "olcSmbK5PwdEnable "
 606                         "$ olcSmbK5PwdMustChange "
 607                 ") )", Cft_Overlay, smbk5pwd_cfats },
 608
 609         { NULL, 0, NULL }
 610 };
 611
 612 /*
 613  * add here other functionalities; handle their initialization
 614  * as appropriate in smbk5pwd_modules_init().
 615  */
 616 static slap_verbmasks smbk5pwd_modules[] = {
 617         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 618         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 619         { BER_BVNULL,                   -1 }
 620 };
 621
 622 static int
 623 smbk5pwd_cf_func( ConfigArgs *c )
 624 {
 625         slap_overinst   *on = (slap_overinst *)c->bi;
 626
 627         int             rc = 0;
 628         smbk5pwd_t      *pi = on->on_bi.bi_private;
 629
 630         if ( c->op == SLAP_CONFIG_EMIT ) {
 631                 switch( c->type ) {
 632                 case PC_SMB_MUST_CHANGE:
 633 #ifdef DO_SAMBA
 634                         c->value_int = pi->smb_must_change;
 635 #else /* ! DO_SAMBA */
 636                         c->value_int = 0;
 637 #endif /* ! DO_SAMBA */
 638                         break;
 639
 640                 case PC_SMB_ENABLE:
 641                         c->rvalue_vals = NULL;
 642                         if ( pi->mode ) {
 643                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 644                                 if ( c->rvalue_vals == NULL ) {
 645                                         rc = 1;
 646                                 }
 647                         }
 648                         break;
 649
 650                 default:
 651                         assert( 0 );
 652                         rc = 1;
 653                 }
 654                 return rc;
 655
 656         } else if ( c->op == LDAP_MOD_DELETE ) {
 657                 switch( c->type ) {
 658                 case PC_SMB_MUST_CHANGE:
 659                         break;
 660
 661                 case PC_SMB_ENABLE:
 662                         if ( !c->line ) {
 663                                 pi->mode = 0;
 664
 665                         } else {
 666                                 slap_mask_t     m;
 667
 668                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 669                                 pi->mode &= ~m;
 670                         }
 671                         break;
 672
 673                 default:
 674                         assert( 0 );
 675                         rc = 1;
 676                 }
 677                 return rc;
 678         }
 679
 680         switch( c->type ) {
 681         case PC_SMB_MUST_CHANGE:
 682 #ifdef DO_SAMBA
 683                 if ( c->value_int < 0 ) {
 684                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 685                                 "<%s> invalid negative value \"%d\".",
 686                                 c->log, c->argv[ 0 ], 0 );
 687                         return 1;
 688                 }
 689                 pi->smb_must_change = c->value_int;
 690 #else /* ! DO_SAMBA */
 691                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 692                         "<%s> only meaningful "
 693                         "when compiled with -DDO_SAMBA.\n",
 694                         c->log, c->argv[ 0 ], 0 );
 695                 return 1;
 696 #endif /* ! DO_SAMBA */
 697                 break;
 698
 699         case PC_SMB_ENABLE: {
 700                 slap_mask_t     mode = pi->mode, m;
 701
 702                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 703                 if ( rc > 0 ) {
 704                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 705                                 "<%s> unknown module \"%s\".\n",
 706                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 707                         return 1;
 708                 }
 709
 710                 /* we can hijack the smbk5pwd_t structure because
 711                  * from within the configuration, this is the only
 712                  * active thread. */
 713                 pi->mode |= m;
 714
 715 #ifndef DO_KRB5
 716                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 717                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 718                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 719                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 720                         pi->mode = mode;
 721                         return 1;
 722                 }
 723 #endif /* ! DO_KRB5 */
 724
 725 #ifndef DO_SAMBA
 726                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 727                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 728                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 729                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 730                         pi->mode = mode;
 731                         return 1;
 732                 }
 733 #endif /* ! DO_SAMBA */
 734
 735                 {
 736                         BackendDB       db = *c->be;
 737
 738                         /* Re-initialize the module, because
 739                          * the configuration might have changed */
 740                         db.bd_info = (BackendInfo *)on;
 741                         rc = smbk5pwd_modules_init( pi );
 742                         if ( rc ) {
 743                                 pi->mode = mode;
 744                                 return 1;
 745                         }
 746                 }
 747
 748                 } break;
 749
 750         default:
 751                 assert( 0 );
 752                 return 1;
 753         }
 754         return rc;
 755 }
 756
 757 static int
 758 smbk5pwd_modules_init( smbk5pwd_t *pi )
 759 {
 760         static struct {
 761                 const char              *name;
 762                 AttributeDescription    **adp;
 763         }
 764 #ifdef DO_KRB5
 765         krb5_ad[] = {
 766                 { "krb5Key",                    &ad_krb5Key },
 767                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 768                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 769                 { NULL }
 770         },
 771 #endif /* DO_KRB5 */
 772 #ifdef DO_SAMBA
 773         samba_ad[] = {
 774                 { "sambaLMPassword",            &ad_sambaLMPassword },
 775                 { "sambaNTPassword",            &ad_sambaNTPassword },
 776                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 777                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 778                 { NULL }
 779         },
 780 #endif /* DO_SAMBA */
 781         dummy_ad;
 782
 783         /* this is to silence the unused var warning */
 784         dummy_ad.name = NULL;
 785
 786 #ifdef DO_KRB5
 787         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 788                 krb5_error_code ret;
 789                 extern HDB      *_kadm5_s_get_db(void *);
 790
 791                 int             i, rc;
 792
 793                 /* Make sure all of our necessary schema items are loaded */
 794                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 795                 if ( !oc_krb5KDCEntry ) {
 796                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 797                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 798                                 0, 0, 0 );
 799                         return -1;
 800                 }
 801
 802                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 803                         const char      *text;
 804
 805                         *(krb5_ad[ i ].adp) = NULL;
 806
 807                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 808                         if ( rc != LDAP_SUCCESS ) {
 809                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 810                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 811                                         krb5_ad[ i ].name, text, rc );
 812                                 oc_krb5KDCEntry = NULL;
 813                                 return rc;
 814                         }
 815                 }
 816
 817                 /* Initialize Kerberos context */
 818                 ret = krb5_init_context(&context);
 819                 if (ret) {
 820                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 821                                 "unable to initialize krb5 context.\n",
 822                                 0, 0, 0 );
 823                         oc_krb5KDCEntry = NULL;
 824                         return -1;
 825                 }
 826
 827                 /* FIXME: check return code? */
 828                 ret = kadm5_s_init_with_password_ctx( context,
 829                         KADM5_ADMIN_SERVICE,
 830                         NULL,
 831                         KADM5_ADMIN_SERVICE,
 832                         &conf, 0, 0, &kadm_context );
 833
 834                 /* FIXME: check return code? */
 835                 db = _kadm5_s_get_db( kadm_context );
 836         }
 837 #endif /* DO_KRB5 */
 838
 839 #ifdef DO_SAMBA
 840         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 841                 int             i, rc;
 842
 843                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 844                 if ( !oc_sambaSamAccount ) {
 845                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 846                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 847                                 0, 0, 0 );
 848                         return -1;
 849                 }
 850
 851                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 852                         const char      *text;
 853
 854                         *(samba_ad[ i ].adp) = NULL;
 855
 856                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 857                         if ( rc != LDAP_SUCCESS ) {
 858                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 859                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 860                                         samba_ad[ i ].name, text, rc );
 861                                 oc_sambaSamAccount = NULL;
 862                                 return rc;
 863                         }
 864                 }
 865         }
 866 #endif /* DO_SAMBA */
 867
 868         return 0;
 869 }
 870
 871 static int
 872 smbk5pwd_db_init(BackendDB *be)
 873 {
 874         slap_overinst   *on = (slap_overinst *)be->bd_info;
 875         smbk5pwd_t      *pi;
 876
 877         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 878         if ( pi == NULL ) {
 879                 return 1;
 880         }
 881         on->on_bi.bi_private = (void *)pi;
 882
 883         return 0;
 884 }
 885
 886 static int
 887 smbk5pwd_db_open(BackendDB *be)
 888 {
 889         slap_overinst   *on = (slap_overinst *)be->bd_info;
 890         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 891
 892         int     rc;
 893
 894         if ( pi->mode == 0 ) {
 895                 pi->mode = SMBK5PWD_F_ALL;
 896         }
 897
 898         rc = smbk5pwd_modules_init( pi );
 899         if ( rc ) {
 900                 return rc;
 901         }
 902
 903         return 0;
 904 }
 905
 906 static int
 907 smbk5pwd_db_destroy(BackendDB *be)
 908 {
 909         slap_overinst   *on = (slap_overinst *)be->bd_info;
 910         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 911
 912         if ( pi ) {
 913                 ch_free( pi );
 914         }
 915
 916         return 0;
 917 }
 918
 919 int
 920 smbk5pwd_initialize(void)
 921 {
 922         int             rc;
 923
 924         smbk5pwd.on_bi.bi_type = "smbk5pwd";
 925
 926         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
 927         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
 928         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
 929
 930         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
 931
 932 #ifdef DO_KRB5
 933         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
 934
 935         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
 936 #endif
 937
 938         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
 939
 940         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
 941         if ( rc ) {
 942                 return rc;
 943         }
 944
 945         return overlay_register( &smbk5pwd );
 946 }
 947
 948 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
 949 int init_module(int argc, char *argv[]) {
 950         return smbk5pwd_initialize();
 951 }
 952 #endif
 953
 954 #endif /* defined(SLAPD_OVER_SMBK5PWD) */