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 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 AttributeDescription *ad_sambaPwdCanChange;
  75 static ObjectClass *oc_sambaSamAccount;
  76 #endif
  77
  78 /* Per-instance configuration information */
  79 typedef struct smbk5pwd_t {
  80         unsigned        mode;
  81 #define SMBK5PWD_F_KRB5         (0x1U)
  82 #define SMBK5PWD_F_SAMBA        (0x2U)
  83
  84 #define SMBK5PWD_DO_KRB5(pi)    ((pi)->mode & SMBK5PWD_F_KRB5)
  85 #define SMBK5PWD_DO_SAMBA(pi)   ((pi)->mode & SMBK5PWD_F_SAMBA)
  86
  87 #ifdef DO_KRB5
  88         /* nothing yet */
  89 #endif
  90
  91 #ifdef DO_SAMBA
  92         /* How many seconds before forcing a password change? */
  93         time_t  smb_must_change;
  94         /* How many seconds after allowing a password change? */
  95         time_t  smb_can_change;
  96 #endif
  97 } smbk5pwd_t;
  98
  99 static const unsigned SMBK5PWD_F_ALL    =
 100         0
 101 #ifdef DO_KRB5
 102         | SMBK5PWD_F_KRB5
 103 #endif
 104 #ifdef DO_SAMBA
 105         | SMBK5PWD_F_SAMBA
 106 #endif
 107 ;
 108
 109 static int smbk5pwd_modules_init( smbk5pwd_t *pi );
 110
 111 #ifdef DO_SAMBA
 112 static const char hex[] = "0123456789abcdef";
 113
 114 /* From liblutil/passwd.c... */
 115 static void lmPasswd_to_key(
 116         const char *lmPasswd,
 117         des_cblock *key)
 118 {
 119         const unsigned char *lpw = (const unsigned char *)lmPasswd;
 120         unsigned char *k = (unsigned char *)key;
 121
 122         /* make room for parity bits */
 123         k[0] = lpw[0];
 124         k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
 125         k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
 126         k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
 127         k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
 128         k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
 129         k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
 130         k[7] = ((lpw[6]&0x7F)<<1);
 131
 132         des_set_odd_parity( key );
 133 }
 134
 135 #define MAX_PWLEN 256
 136 #define HASHLEN 16
 137
 138 static void hexify(
 139         const char in[HASHLEN],
 140         struct berval *out
 141 )
 142 {
 143         int i;
 144         char *a;
 145         unsigned char *b;
 146
 147         out->bv_val = ch_malloc(HASHLEN*2 + 1);
 148         out->bv_len = HASHLEN*2;
 149
 150         a = out->bv_val;
 151         b = (unsigned char *)in;
 152         for (i=0; i<HASHLEN; i++) {
 153                 *a++ = hex[*b >> 4];
 154                 *a++ = hex[*b++ & 0x0f];
 155         }
 156         *a++ = '\0';
 157 }
 158
 159 static void lmhash(
 160         struct berval *passwd,
 161         struct berval *hash
 162 )
 163 {
 164         char UcasePassword[15];
 165         des_cblock key;
 166         des_key_schedule schedule;
 167         des_cblock StdText = "KGS!@#$%";
 168         des_cblock hbuf[2];
 169
 170         strncpy( UcasePassword, passwd->bv_val, 14 );
 171         UcasePassword[14] = '\0';
 172         ldap_pvt_str2upper( UcasePassword );
 173
 174         lmPasswd_to_key( UcasePassword, &key );
 175         des_set_key_unchecked( &key, schedule );
 176         des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
 177
 178         lmPasswd_to_key( &UcasePassword[7], &key );
 179         des_set_key_unchecked( &key, schedule );
 180         des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
 181
 182         hexify( (char *)hbuf, hash );
 183 }
 184
 185 static void nthash(
 186         struct berval *passwd,
 187         struct berval *hash
 188 )
 189 {
 190         /* Windows currently only allows 14 character passwords, but
 191          * may support up to 256 in the future. We assume this means
 192          * 256 UCS2 characters, not 256 bytes...
 193          */
 194         char hbuf[HASHLEN];
 195         MD4_CTX ctx;
 196
 197         if (passwd->bv_len > MAX_PWLEN*2)
 198                 passwd->bv_len = MAX_PWLEN*2;
 199
 200         MD4_Init( &ctx );
 201         MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
 202         MD4_Final( (unsigned char *)hbuf, &ctx );
 203
 204         hexify( hbuf, hash );
 205 }
 206 #endif /* DO_SAMBA */
 207
 208 #ifdef DO_KRB5
 209
 210 static int smbk5pwd_op_cleanup(
 211         Operation *op,
 212         SlapReply *rs )
 213 {
 214         slap_callback *cb;
 215
 216         /* clear out the current key */
 217         ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
 218                 NULL, NULL );
 219
 220         /* free the callback */
 221         cb = op->o_callback;
 222         op->o_callback = cb->sc_next;
 223         op->o_tmpfree( cb, op->o_tmpmemctx );
 224         return 0;
 225 }
 226
 227 static int smbk5pwd_op_bind(
 228         Operation *op,
 229         SlapReply *rs )
 230 {
 231         /* If this is a simple Bind, stash the Op pointer so our chk
 232          * function can find it. Set a cleanup callback to clear it
 233          * out when the Bind completes.
 234          */
 235         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
 236                 slap_callback *cb;
 237                 ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup, op,
 238                         NULL );
 239                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
 240                 cb->sc_cleanup = smbk5pwd_op_cleanup;
 241                 cb->sc_next = op->o_callback;
 242                 op->o_callback = cb;
 243         }
 244         return SLAP_CB_CONTINUE;
 245 }
 246
 247 static LUTIL_PASSWD_CHK_FUNC k5key_chk;
 248 static LUTIL_PASSWD_HASH_FUNC k5key_hash;
 249 static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
 250
 251 /* This password scheme stores no data in the userPassword attribute
 252  * other than the scheme name. It assumes the invoking entry is a
 253  * krb5KDCentry and compares the passed-in credentials against the
 254  * krb5Key attribute. The krb5Key may be multi-valued, but they are
 255  * simply multiple keytypes generated from the same input string, so
 256  * only the first value needs to be compared here.
 257  *
 258  * Since the lutil_passwd API doesn't pass the Entry object in, we
 259  * have to fetch it ourselves in order to get access to the other
 260  * attributes. We accomplish this with the help of the overlay's Bind
 261  * function, which stores the current Operation pointer in thread-specific
 262  * storage so we can retrieve it here. The Operation provides all
 263  * the necessary context for us to get Entry from the database.
 264  */
 265 static int k5key_chk(
 266         const struct berval *sc,
 267         const struct berval *passwd,
 268         const struct berval *cred,
 269         const char **text )
 270 {
 271         void *ctx;
 272         Operation *op;
 273         int rc;
 274         Entry *e;
 275         Attribute *a;
 276     krb5_error_code ret;
 277     krb5_keyblock key;
 278     krb5_salt salt;
 279         hdb_entry ent;
 280
 281         /* Find our thread context, find our Operation */
 282         ctx = ldap_pvt_thread_pool_context();
 283
 284         if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, (void **)&op, NULL ) ||
 285                 !op )
 286                 return LUTIL_PASSWD_ERR;
 287
 288         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 289         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 290
 291         rc = LUTIL_PASSWD_ERR;
 292         do {
 293                 size_t l;
 294                 Key ekey = {0};
 295
 296                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 297                 if (!a ) break;
 298
 299                 memset( &ent, 0, sizeof(ent) );
 300                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 301                 if ( ret ) break;
 302                 krb5_get_pw_salt( context, ent.principal, &salt );
 303                 krb5_free_principal( context, ent.principal );
 304
 305                 a = attr_find( e->e_attrs, ad_krb5Key );
 306                 if ( !a ) break;
 307
 308                 ent.keys.len = 1;
 309                 ent.keys.val = &ekey;
 310                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 311                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 312                 if ( db->HDB_MASTER_KEY_SET )
 313                         hdb_unseal_keys( context, db, &ent );
 314
 315                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 316                         salt, &key );
 317
 318                 krb5_free_salt( context, salt );
 319
 320                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 321                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 322
 323                 krb5_free_keyblock_contents( context, &key );
 324                 krb5_free_keyblock_contents( context, &ekey.key );
 325
 326         } while(0);
 327         be_entry_release_r( op, e );
 328         return rc;
 329 }
 330
 331 static int k5key_hash(
 332         const struct berval *scheme,
 333         const struct berval *passwd,
 334         struct berval *hash,
 335         const char **text )
 336 {
 337         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 338         return LUTIL_PASSWD_OK;
 339 }
 340 #endif /* DO_KRB5 */
 341
 342 static int smbk5pwd_exop_passwd(
 343         Operation *op,
 344         SlapReply *rs )
 345 {
 346         int rc;
 347         req_pwdexop_s *qpw = &op->oq_pwdexop;
 348         Entry *e;
 349         Modifications *ml;
 350         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 351         smbk5pwd_t *pi = on->on_bi.bi_private;
 352
 353         /* Not the operation we expected, pass it on... */
 354         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 355                 return SLAP_CB_CONTINUE;
 356         }
 357
 358         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 359         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 360         if ( rc != LDAP_SUCCESS ) return rc;
 361
 362 #ifdef DO_KRB5
 363         /* Kerberos stuff */
 364         do {
 365                 krb5_error_code ret;
 366                 hdb_entry ent;
 367                 struct berval *keys;
 368                 int kvno, i;
 369                 Attribute *a;
 370
 371                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 372
 373                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 374
 375                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 376                 if ( !a ) break;
 377
 378                 memset( &ent, 0, sizeof(ent) );
 379                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 380                 if ( ret ) break;
 381
 382                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 383                 kvno = 0;
 384                 if ( a ) {
 385                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 386                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 387                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 388                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 389                         }
 390
 391                 } else {
 392                         /* shouldn't happen, this is a required attr */
 393                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 394                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 395                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 396                 }
 397
 398                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 399                 hdb_seal_keys(context, db, &ent);
 400                 krb5_free_principal( context, ent.principal );
 401
 402                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 403
 404                 for (i = 0; i < ent.keys.len; i++) {
 405                         unsigned char *buf;
 406                         size_t len;
 407
 408                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 409                         if (ret != 0)
 410                                 break;
 411
 412                         keys[i].bv_val = (char *)buf;
 413                         keys[i].bv_len = len;
 414                 }
 415                 BER_BVZERO( &keys[i] );
 416
 417                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 418
 419                 if ( i != ent.keys.len ) {
 420                         ber_bvarray_free( keys );
 421                         break;
 422                 }
 423
 424                 ml = ch_malloc(sizeof(Modifications));
 425                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 426                 ml->sml_next = qpw->rs_mods;
 427                 qpw->rs_mods = ml;
 428
 429                 ml->sml_desc = ad_krb5Key;
 430                 ml->sml_op = LDAP_MOD_REPLACE;
 431 #ifdef SLAP_MOD_INTERNAL
 432                 ml->sml_flags = SLAP_MOD_INTERNAL;
 433 #endif
 434                 ml->sml_values = keys;
 435                 ml->sml_nvalues = NULL;
 436
 437                 ml = ch_malloc(sizeof(Modifications));
 438                 ml->sml_next = qpw->rs_mods;
 439                 qpw->rs_mods = ml;
 440
 441                 ml->sml_desc = ad_krb5KeyVersionNumber;
 442                 ml->sml_op = LDAP_MOD_REPLACE;
 443 #ifdef SLAP_MOD_INTERNAL
 444                 ml->sml_flags = SLAP_MOD_INTERNAL;
 445 #endif
 446                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 447                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 448                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 449                         "%d", kvno+1 );
 450                 BER_BVZERO( &ml->sml_values[1] );
 451                 ml->sml_nvalues = NULL;
 452         } while ( 0 );
 453 #endif /* DO_KRB5 */
 454
 455 #ifdef DO_SAMBA
 456         /* Samba stuff */
 457         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 458                 struct berval *keys;
 459                 ber_len_t j,l;
 460                 wchar_t *wcs, wc;
 461                 char *c, *d;
 462                 struct berval pwd;
 463
 464                 /* Expand incoming UTF8 string to UCS4 */
 465                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 466                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 467
 468                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 469
 470                 /* Truncate UCS4 to UCS2 */
 471                 c = (char *)wcs;
 472                 for (j=0; j<l; j++) {
 473                         wc = wcs[j];
 474                         *c++ = wc & 0xff;
 475                         *c++ = (wc >> 8) & 0xff;
 476                 }
 477                 *c++ = 0;
 478                 pwd.bv_val = (char *)wcs;
 479                 pwd.bv_len = l * 2;
 480
 481                 ml = ch_malloc(sizeof(Modifications));
 482                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 483                 ml->sml_next = qpw->rs_mods;
 484                 qpw->rs_mods = ml;
 485
 486                 keys = ch_malloc( 2 * sizeof(struct berval) );
 487                 BER_BVZERO( &keys[1] );
 488                 nthash( &pwd, keys );
 489
 490                 ml->sml_desc = ad_sambaNTPassword;
 491                 ml->sml_op = LDAP_MOD_REPLACE;
 492 #ifdef SLAP_MOD_INTERNAL
 493                 ml->sml_flags = SLAP_MOD_INTERNAL;
 494 #endif
 495                 ml->sml_values = keys;
 496                 ml->sml_nvalues = NULL;
 497
 498                 /* Truncate UCS2 to 8-bit ASCII */
 499                 c = pwd.bv_val+1;
 500                 d = pwd.bv_val+2;
 501                 for (j=1; j<l; j++) {
 502                         *c++ = *d++;
 503                         d++;
 504                 }
 505                 pwd.bv_len /= 2;
 506                 pwd.bv_val[pwd.bv_len] = '\0';
 507
 508                 ml = ch_malloc(sizeof(Modifications));
 509                 ml->sml_next = qpw->rs_mods;
 510                 qpw->rs_mods = ml;
 511
 512                 keys = ch_malloc( 2 * sizeof(struct berval) );
 513                 BER_BVZERO( &keys[1] );
 514                 lmhash( &pwd, keys );
 515
 516                 ml->sml_desc = ad_sambaLMPassword;
 517                 ml->sml_op = LDAP_MOD_REPLACE;
 518 #ifdef SLAP_MOD_INTERNAL
 519                 ml->sml_flags = SLAP_MOD_INTERNAL;
 520 #endif
 521                 ml->sml_values = keys;
 522                 ml->sml_nvalues = NULL;
 523
 524                 ch_free(wcs);
 525
 526                 ml = ch_malloc(sizeof(Modifications));
 527                 ml->sml_next = qpw->rs_mods;
 528                 qpw->rs_mods = ml;
 529
 530                 keys = ch_malloc( 2 * sizeof(struct berval) );
 531                 keys[0].bv_val = ch_malloc( STRLENOF( "9223372036854775807L" ) + 1 );
 532                 keys[0].bv_len = snprintf(keys[0].bv_val,
 533                         STRLENOF( "9223372036854775807L" ) + 1,
 534                         "%ld", slap_get_time());
 535                 BER_BVZERO( &keys[1] );
 536
 537                 ml->sml_desc = ad_sambaPwdLastSet;
 538                 ml->sml_op = LDAP_MOD_REPLACE;
 539 #ifdef SLAP_MOD_INTERNAL
 540                 ml->sml_flags = SLAP_MOD_INTERNAL;
 541 #endif
 542                 ml->sml_values = keys;
 543                 ml->sml_nvalues = NULL;
 544
 545                 if (pi->smb_must_change)
 546                 {
 547                         ml = ch_malloc(sizeof(Modifications));
 548                         ml->sml_next = qpw->rs_mods;
 549                         qpw->rs_mods = ml;
 550
 551                         keys = ch_malloc( 2 * sizeof(struct berval) );
 552                         keys[0].bv_val = ch_malloc( STRLENOF( "9223372036854775807L" ) + 1 );
 553                         keys[0].bv_len = snprintf(keys[0].bv_val,
 554                                         STRLENOF( "9223372036854775807L" ) + 1,
 555                                         "%ld", slap_get_time() + pi->smb_must_change);
 556                         BER_BVZERO( &keys[1] );
 557
 558                         ml->sml_desc = ad_sambaPwdMustChange;
 559                         ml->sml_op = LDAP_MOD_REPLACE;
 560 #ifdef SLAP_MOD_INTERNAL
 561                         ml->sml_flags = SLAP_MOD_INTERNAL;
 562 #endif
 563                         ml->sml_values = keys;
 564                         ml->sml_nvalues = NULL;
 565                 }
 566
 567                 if (pi->smb_can_change)
 568                 {
 569                         ml = ch_malloc(sizeof(Modifications));
 570                         ml->sml_next = qpw->rs_mods;
 571                         qpw->rs_mods = ml;
 572
 573                         keys = ch_malloc( 2 * sizeof(struct berval) );
 574                         keys[0].bv_val = ch_malloc( STRLENOF( "9223372036854775807L" ) + 1 );
 575                         keys[0].bv_len = snprintf(keys[0].bv_val,
 576                                         STRLENOF( "9223372036854775807L" ) + 1,
 577                                         "%ld", slap_get_time() + pi->smb_can_change);
 578                         BER_BVZERO( &keys[1] );
 579
 580                         ml->sml_desc = ad_sambaPwdCanChange;
 581                         ml->sml_op = LDAP_MOD_REPLACE;
 582 #ifdef SLAP_MOD_INTERNAL
 583                         ml->sml_flags = SLAP_MOD_INTERNAL;
 584 #endif
 585                         ml->sml_values = keys;
 586                         ml->sml_nvalues = NULL;
 587                 }
 588         }
 589 #endif /* DO_SAMBA */
 590         be_entry_release_r( op, e );
 591
 592         return SLAP_CB_CONTINUE;
 593 }
 594
 595 static slap_overinst smbk5pwd;
 596
 597 /* back-config stuff */
 598 enum {
 599         PC_SMB_MUST_CHANGE = 1,
 600         PC_SMB_CAN_CHANGE,
 601         PC_SMB_ENABLE
 602 };
 603
 604 static ConfigDriver smbk5pwd_cf_func;
 605
 606 /*
 607  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 608  */
 609
 610 static ConfigTable smbk5pwd_cfats[] = {
 611         { "smbk5pwd-enable", "arg",
 612                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 613                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 614                 "DESC 'Modules to be enabled' "
 615                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 616         { "smbk5pwd-must-change", "time",
 617                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 618                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 619                 "DESC 'Credentials validity interval' "
 620                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 621         { "smbk5pwd-can-change", "time",
 622                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 623                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 624                 "DESC 'Credentials minimum validity interval' "
 625                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 626
 627         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 628 };
 629
 630 static ConfigOCs smbk5pwd_cfocs[] = {
 631         { "( OLcfgCtOc:1.1 "
 632                 "NAME 'olcSmbK5PwdConfig' "
 633                 "DESC 'smbk5pwd overlay configuration' "
 634                 "SUP olcOverlayConfig "
 635                 "MAY ( "
 636                         "olcSmbK5PwdEnable "
 637                         "$ olcSmbK5PwdMustChange "
 638                         "$ olcSmbK5PwdCanChange "
 639                 ") )", Cft_Overlay, smbk5pwd_cfats },
 640
 641         { NULL, 0, NULL }
 642 };
 643
 644 /*
 645  * add here other functionalities; handle their initialization
 646  * as appropriate in smbk5pwd_modules_init().
 647  */
 648 static slap_verbmasks smbk5pwd_modules[] = {
 649         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 650         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 651         { BER_BVNULL,                   -1 }
 652 };
 653
 654 static int
 655 smbk5pwd_cf_func( ConfigArgs *c )
 656 {
 657         slap_overinst   *on = (slap_overinst *)c->bi;
 658
 659         int             rc = 0;
 660         smbk5pwd_t      *pi = on->on_bi.bi_private;
 661
 662         if ( c->op == SLAP_CONFIG_EMIT ) {
 663                 switch( c->type ) {
 664                 case PC_SMB_MUST_CHANGE:
 665 #ifdef DO_SAMBA
 666                         c->value_int = pi->smb_must_change;
 667 #else /* ! DO_SAMBA */
 668                         c->value_int = 0;
 669 #endif /* ! DO_SAMBA */
 670                         break;
 671
 672                 case PC_SMB_CAN_CHANGE:
 673 #ifdef DO_SAMBA
 674                         c->value_int = pi->smb_can_change;
 675 #else /* ! DO_SAMBA */
 676                         c->value_int = 0;
 677 #endif /* ! DO_SAMBA */
 678                         break;
 679
 680                 case PC_SMB_ENABLE:
 681                         c->rvalue_vals = NULL;
 682                         if ( pi->mode ) {
 683                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 684                                 if ( c->rvalue_vals == NULL ) {
 685                                         rc = 1;
 686                                 }
 687                         }
 688                         break;
 689
 690                 default:
 691                         assert( 0 );
 692                         rc = 1;
 693                 }
 694                 return rc;
 695
 696         } else if ( c->op == LDAP_MOD_DELETE ) {
 697                 switch( c->type ) {
 698                 case PC_SMB_MUST_CHANGE:
 699                         break;
 700
 701                 case PC_SMB_CAN_CHANGE:
 702                         break;
 703
 704                 case PC_SMB_ENABLE:
 705                         if ( !c->line ) {
 706                                 pi->mode = 0;
 707
 708                         } else {
 709                                 slap_mask_t     m;
 710
 711                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 712                                 pi->mode &= ~m;
 713                         }
 714                         break;
 715
 716                 default:
 717                         assert( 0 );
 718                         rc = 1;
 719                 }
 720                 return rc;
 721         }
 722
 723         switch( c->type ) {
 724         case PC_SMB_MUST_CHANGE:
 725 #ifdef DO_SAMBA
 726                 if ( c->value_int < 0 ) {
 727                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 728                                 "<%s> invalid negative value \"%d\".",
 729                                 c->log, c->argv[ 0 ], 0 );
 730                         return 1;
 731                 }
 732                 pi->smb_must_change = c->value_int;
 733 #else /* ! DO_SAMBA */
 734                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 735                         "<%s> only meaningful "
 736                         "when compiled with -DDO_SAMBA.\n",
 737                         c->log, c->argv[ 0 ], 0 );
 738                 return 1;
 739 #endif /* ! DO_SAMBA */
 740                 break;
 741
 742         case PC_SMB_CAN_CHANGE:
 743 #ifdef DO_SAMBA
 744                 if ( c->value_int < 0 ) {
 745                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 746                                 "<%s> invalid negative value \"%d\".",
 747                                 c->log, c->argv[ 0 ], 0 );
 748                         return 1;
 749                 }
 750                 pi->smb_can_change = c->value_int;
 751 #else /* ! DO_SAMBA */
 752                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 753                         "<%s> only meaningful "
 754                         "when compiled with -DDO_SAMBA.\n",
 755                         c->log, c->argv[ 0 ], 0 );
 756                 return 1;
 757 #endif /* ! DO_SAMBA */
 758                 break;
 759
 760         case PC_SMB_ENABLE: {
 761                 slap_mask_t     mode = pi->mode, m;
 762
 763                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 764                 if ( rc > 0 ) {
 765                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 766                                 "<%s> unknown module \"%s\".\n",
 767                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 768                         return 1;
 769                 }
 770
 771                 /* we can hijack the smbk5pwd_t structure because
 772                  * from within the configuration, this is the only
 773                  * active thread. */
 774                 pi->mode |= m;
 775
 776 #ifndef DO_KRB5
 777                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 778                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 779                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 780                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 781                         pi->mode = mode;
 782                         return 1;
 783                 }
 784 #endif /* ! DO_KRB5 */
 785
 786 #ifndef DO_SAMBA
 787                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 788                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 789                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 790                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 791                         pi->mode = mode;
 792                         return 1;
 793                 }
 794 #endif /* ! DO_SAMBA */
 795
 796                 {
 797                         BackendDB       db = *c->be;
 798
 799                         /* Re-initialize the module, because
 800                          * the configuration might have changed */
 801                         db.bd_info = (BackendInfo *)on;
 802                         rc = smbk5pwd_modules_init( pi );
 803                         if ( rc ) {
 804                                 pi->mode = mode;
 805                                 return 1;
 806                         }
 807                 }
 808
 809                 } break;
 810
 811         default:
 812                 assert( 0 );
 813                 return 1;
 814         }
 815         return rc;
 816 }
 817
 818 static int
 819 smbk5pwd_modules_init( smbk5pwd_t *pi )
 820 {
 821         static struct {
 822                 const char              *name;
 823                 AttributeDescription    **adp;
 824         }
 825 #ifdef DO_KRB5
 826         krb5_ad[] = {
 827                 { "krb5Key",                    &ad_krb5Key },
 828                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 829                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 830                 { NULL }
 831         },
 832 #endif /* DO_KRB5 */
 833 #ifdef DO_SAMBA
 834         samba_ad[] = {
 835                 { "sambaLMPassword",            &ad_sambaLMPassword },
 836                 { "sambaNTPassword",            &ad_sambaNTPassword },
 837                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 838                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 839                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 840                 { NULL }
 841         },
 842 #endif /* DO_SAMBA */
 843         dummy_ad;
 844
 845         /* this is to silence the unused var warning */
 846         dummy_ad.name = NULL;
 847
 848 #ifdef DO_KRB5
 849         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 850                 krb5_error_code ret;
 851                 extern HDB      *_kadm5_s_get_db(void *);
 852
 853                 int             i, rc;
 854
 855                 /* Make sure all of our necessary schema items are loaded */
 856                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 857                 if ( !oc_krb5KDCEntry ) {
 858                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 859                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 860                                 0, 0, 0 );
 861                         return -1;
 862                 }
 863
 864                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 865                         const char      *text;
 866
 867                         *(krb5_ad[ i ].adp) = NULL;
 868
 869                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 870                         if ( rc != LDAP_SUCCESS ) {
 871                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 872                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 873                                         krb5_ad[ i ].name, text, rc );
 874                                 oc_krb5KDCEntry = NULL;
 875                                 return rc;
 876                         }
 877                 }
 878
 879                 /* Initialize Kerberos context */
 880                 ret = krb5_init_context(&context);
 881                 if (ret) {
 882                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 883                                 "unable to initialize krb5 context (%d).\n",
 884                                 ret, 0, 0 );
 885                         oc_krb5KDCEntry = NULL;
 886                         return -1;
 887                 }
 888
 889                 ret = kadm5_s_init_with_password_ctx( context,
 890                         KADM5_ADMIN_SERVICE,
 891                         NULL,
 892                         KADM5_ADMIN_SERVICE,
 893                         &conf, 0, 0, &kadm_context );
 894                 if (ret) {
 895                         char *err_str, *err_msg = "<unknown error>";
 896                         err_str = krb5_get_error_string( context );
 897                         if (!err_str)
 898                                 err_msg = krb5_get_err_text( context, ret );
 899                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 900                                 "unable to initialize krb5 admin context: %s (%d).\n",
 901                                 err_str ? err_str : err_msg, ret, 0 );
 902                         if (err_str)
 903                                 krb5_free_error_string( context, err_str );
 904                         krb5_free_context( context );
 905                         oc_krb5KDCEntry = NULL;
 906                         return -1;
 907                 }
 908
 909                 db = _kadm5_s_get_db( kadm_context );
 910         }
 911 #endif /* DO_KRB5 */
 912
 913 #ifdef DO_SAMBA
 914         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 915                 int             i, rc;
 916
 917                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 918                 if ( !oc_sambaSamAccount ) {
 919                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 920                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 921                                 0, 0, 0 );
 922                         return -1;
 923                 }
 924
 925                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 926                         const char      *text;
 927
 928                         *(samba_ad[ i ].adp) = NULL;
 929
 930                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 931                         if ( rc != LDAP_SUCCESS ) {
 932                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 933                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 934                                         samba_ad[ i ].name, text, rc );
 935                                 oc_sambaSamAccount = NULL;
 936                                 return rc;
 937                         }
 938                 }
 939         }
 940 #endif /* DO_SAMBA */
 941
 942         return 0;
 943 }
 944
 945 static int
 946 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
 947 {
 948         slap_overinst   *on = (slap_overinst *)be->bd_info;
 949         smbk5pwd_t      *pi;
 950
 951         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 952         if ( pi == NULL ) {
 953                 return 1;
 954         }
 955         on->on_bi.bi_private = (void *)pi;
 956
 957         return 0;
 958 }
 959
 960 static int
 961 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
 962 {
 963         slap_overinst   *on = (slap_overinst *)be->bd_info;
 964         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 965
 966         int     rc;
 967
 968         if ( pi->mode == 0 ) {
 969                 pi->mode = SMBK5PWD_F_ALL;
 970         }
 971
 972         rc = smbk5pwd_modules_init( pi );
 973         if ( rc ) {
 974                 return rc;
 975         }
 976
 977         return 0;
 978 }
 979
 980 static int
 981 smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
 982 {
 983         slap_overinst   *on = (slap_overinst *)be->bd_info;
 984         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 985
 986         if ( pi ) {
 987                 ch_free( pi );
 988         }
 989
 990         return 0;
 991 }
 992
 993 int
 994 smbk5pwd_initialize(void)
 995 {
 996         int             rc;
 997
 998         smbk5pwd.on_bi.bi_type = "smbk5pwd";
 999
1000         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1001         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1002         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1003
1004         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1005
1006 #ifdef DO_KRB5
1007         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1008
1009         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1010 #endif
1011
1012         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1013
1014         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1015         if ( rc ) {
1016                 return rc;
1017         }
1018
1019         return overlay_register( &smbk5pwd );
1020 }
1021
1022 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1023 int init_module(int argc, char *argv[]) {
1024         return smbk5pwd_initialize();
1025 }
1026 #endif
1027
1028 #endif /* defined(SLAPD_OVER_SMBK5PWD) */