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, 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,
 238                         smbk5pwd_op_cleanup, op, NULL, NULL, 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, *op_tmp;
 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, &op_tmp, NULL )
 285                  || !op_tmp )
 286                 return LUTIL_PASSWD_ERR;
 287         op = op_tmp;
 288
 289         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 290         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 291
 292         rc = LUTIL_PASSWD_ERR;
 293         do {
 294                 size_t l;
 295                 Key ekey = {0};
 296
 297                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 298                 if (!a ) break;
 299
 300                 memset( &ent, 0, sizeof(ent) );
 301                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 302                 if ( ret ) break;
 303                 krb5_get_pw_salt( context, ent.principal, &salt );
 304                 krb5_free_principal( context, ent.principal );
 305
 306                 a = attr_find( e->e_attrs, ad_krb5Key );
 307                 if ( !a ) break;
 308
 309                 ent.keys.len = 1;
 310                 ent.keys.val = &ekey;
 311                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 312                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 313                 if ( db->HDB_MASTER_KEY_SET )
 314                         hdb_unseal_keys( context, db, &ent );
 315
 316                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 317                         salt, &key );
 318
 319                 krb5_free_salt( context, salt );
 320
 321                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 322                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 323
 324                 krb5_free_keyblock_contents( context, &key );
 325                 krb5_free_keyblock_contents( context, &ekey.key );
 326
 327         } while(0);
 328         be_entry_release_r( op, e );
 329         return rc;
 330 }
 331
 332 static int k5key_hash(
 333         const struct berval *scheme,
 334         const struct berval *passwd,
 335         struct berval *hash,
 336         const char **text )
 337 {
 338         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 339         return LUTIL_PASSWD_OK;
 340 }
 341 #endif /* DO_KRB5 */
 342
 343 static int smbk5pwd_exop_passwd(
 344         Operation *op,
 345         SlapReply *rs )
 346 {
 347         int rc;
 348         req_pwdexop_s *qpw = &op->oq_pwdexop;
 349         Entry *e;
 350         Modifications *ml;
 351         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 352         smbk5pwd_t *pi = on->on_bi.bi_private;
 353
 354         /* Not the operation we expected, pass it on... */
 355         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 356                 return SLAP_CB_CONTINUE;
 357         }
 358
 359         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 360         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 361         if ( rc != LDAP_SUCCESS ) return rc;
 362
 363 #ifdef DO_KRB5
 364         /* Kerberos stuff */
 365         do {
 366                 krb5_error_code ret;
 367                 hdb_entry ent;
 368                 struct berval *keys;
 369                 int kvno, i;
 370                 Attribute *a;
 371
 372                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 373
 374                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 375
 376                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 377                 if ( !a ) break;
 378
 379                 memset( &ent, 0, sizeof(ent) );
 380                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 381                 if ( ret ) break;
 382
 383                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 384                 kvno = 0;
 385                 if ( a ) {
 386                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 387                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 388                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 389                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 390                         }
 391
 392                 } else {
 393                         /* shouldn't happen, this is a required attr */
 394                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 395                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 396                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 397                 }
 398
 399                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 400                 hdb_seal_keys(context, db, &ent);
 401                 krb5_free_principal( context, ent.principal );
 402
 403                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 404
 405                 for (i = 0; i < ent.keys.len; i++) {
 406                         unsigned char *buf;
 407                         size_t len;
 408
 409                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 410                         if (ret != 0)
 411                                 break;
 412
 413                         keys[i].bv_val = (char *)buf;
 414                         keys[i].bv_len = len;
 415                 }
 416                 BER_BVZERO( &keys[i] );
 417
 418                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 419
 420                 if ( i != ent.keys.len ) {
 421                         ber_bvarray_free( keys );
 422                         break;
 423                 }
 424
 425                 ml = ch_malloc(sizeof(Modifications));
 426                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 427                 ml->sml_next = qpw->rs_mods;
 428                 qpw->rs_mods = ml;
 429
 430                 ml->sml_desc = ad_krb5Key;
 431                 ml->sml_op = LDAP_MOD_REPLACE;
 432 #ifdef SLAP_MOD_INTERNAL
 433                 ml->sml_flags = SLAP_MOD_INTERNAL;
 434 #endif
 435                 ml->sml_numvals = i;
 436                 ml->sml_values = keys;
 437                 ml->sml_nvalues = NULL;
 438
 439                 ml = ch_malloc(sizeof(Modifications));
 440                 ml->sml_next = qpw->rs_mods;
 441                 qpw->rs_mods = ml;
 442
 443                 ml->sml_desc = ad_krb5KeyVersionNumber;
 444                 ml->sml_op = LDAP_MOD_REPLACE;
 445 #ifdef SLAP_MOD_INTERNAL
 446                 ml->sml_flags = SLAP_MOD_INTERNAL;
 447 #endif
 448                 ml->sml_numvals = 1;
 449                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 450                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 451                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 452                         "%d", kvno+1 );
 453                 BER_BVZERO( &ml->sml_values[1] );
 454                 ml->sml_nvalues = NULL;
 455         } while ( 0 );
 456 #endif /* DO_KRB5 */
 457
 458 #ifdef DO_SAMBA
 459         /* Samba stuff */
 460         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 461                 struct berval *keys;
 462                 ber_len_t j,l;
 463                 wchar_t *wcs, wc;
 464                 char *c, *d;
 465                 struct berval pwd;
 466
 467                 /* Expand incoming UTF8 string to UCS4 */
 468                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 469                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 470
 471                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 472
 473                 /* Truncate UCS4 to UCS2 */
 474                 c = (char *)wcs;
 475                 for (j=0; j<l; j++) {
 476                         wc = wcs[j];
 477                         *c++ = wc & 0xff;
 478                         *c++ = (wc >> 8) & 0xff;
 479                 }
 480                 *c++ = 0;
 481                 pwd.bv_val = (char *)wcs;
 482                 pwd.bv_len = l * 2;
 483
 484                 ml = ch_malloc(sizeof(Modifications));
 485                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 486                 ml->sml_next = qpw->rs_mods;
 487                 qpw->rs_mods = ml;
 488
 489                 keys = ch_malloc( 2 * sizeof(struct berval) );
 490                 BER_BVZERO( &keys[1] );
 491                 nthash( &pwd, keys );
 492
 493                 ml->sml_desc = ad_sambaNTPassword;
 494                 ml->sml_op = LDAP_MOD_REPLACE;
 495 #ifdef SLAP_MOD_INTERNAL
 496                 ml->sml_flags = SLAP_MOD_INTERNAL;
 497 #endif
 498                 ml->sml_numvals = 1;
 499                 ml->sml_values = keys;
 500                 ml->sml_nvalues = NULL;
 501
 502                 /* Truncate UCS2 to 8-bit ASCII */
 503                 c = pwd.bv_val+1;
 504                 d = pwd.bv_val+2;
 505                 for (j=1; j<l; j++) {
 506                         *c++ = *d++;
 507                         d++;
 508                 }
 509                 pwd.bv_len /= 2;
 510                 pwd.bv_val[pwd.bv_len] = '\0';
 511
 512                 ml = ch_malloc(sizeof(Modifications));
 513                 ml->sml_next = qpw->rs_mods;
 514                 qpw->rs_mods = ml;
 515
 516                 keys = ch_malloc( 2 * sizeof(struct berval) );
 517                 BER_BVZERO( &keys[1] );
 518                 lmhash( &pwd, keys );
 519
 520                 ml->sml_desc = ad_sambaLMPassword;
 521                 ml->sml_op = LDAP_MOD_REPLACE;
 522 #ifdef SLAP_MOD_INTERNAL
 523                 ml->sml_flags = SLAP_MOD_INTERNAL;
 524 #endif
 525                 ml->sml_numvals = 1;
 526                 ml->sml_values = keys;
 527                 ml->sml_nvalues = NULL;
 528
 529                 ch_free(wcs);
 530
 531                 ml = ch_malloc(sizeof(Modifications));
 532                 ml->sml_next = qpw->rs_mods;
 533                 qpw->rs_mods = ml;
 534
 535                 keys = ch_malloc( 2 * sizeof(struct berval) );
 536                 keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 537                 keys[0].bv_len = snprintf(keys[0].bv_val,
 538                         LDAP_PVT_INTTYPE_CHARS(long),
 539                         "%ld", slap_get_time());
 540                 BER_BVZERO( &keys[1] );
 541
 542                 ml->sml_desc = ad_sambaPwdLastSet;
 543                 ml->sml_op = LDAP_MOD_REPLACE;
 544 #ifdef SLAP_MOD_INTERNAL
 545                 ml->sml_flags = SLAP_MOD_INTERNAL;
 546 #endif
 547                 ml->sml_numvals = 1;
 548                 ml->sml_values = keys;
 549                 ml->sml_nvalues = NULL;
 550
 551                 if (pi->smb_must_change)
 552                 {
 553                         ml = ch_malloc(sizeof(Modifications));
 554                         ml->sml_next = qpw->rs_mods;
 555                         qpw->rs_mods = ml;
 556
 557                         keys = ch_malloc( 2 * sizeof(struct berval) );
 558                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 559                         keys[0].bv_len = snprintf(keys[0].bv_val,
 560                                         LDAP_PVT_INTTYPE_CHARS(long),
 561                                         "%ld", slap_get_time() + pi->smb_must_change);
 562                         BER_BVZERO( &keys[1] );
 563
 564                         ml->sml_desc = ad_sambaPwdMustChange;
 565                         ml->sml_op = LDAP_MOD_REPLACE;
 566 #ifdef SLAP_MOD_INTERNAL
 567                         ml->sml_flags = SLAP_MOD_INTERNAL;
 568 #endif
 569                         ml->sml_numvals = 1;
 570                         ml->sml_values = keys;
 571                         ml->sml_nvalues = NULL;
 572                 }
 573
 574                 if (pi->smb_can_change)
 575                 {
 576                         ml = ch_malloc(sizeof(Modifications));
 577                         ml->sml_next = qpw->rs_mods;
 578                         qpw->rs_mods = ml;
 579
 580                         keys = ch_malloc( 2 * sizeof(struct berval) );
 581                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 582                         keys[0].bv_len = snprintf(keys[0].bv_val,
 583                                         LDAP_PVT_INTTYPE_CHARS(long),
 584                                         "%ld", slap_get_time() + pi->smb_can_change);
 585                         BER_BVZERO( &keys[1] );
 586
 587                         ml->sml_desc = ad_sambaPwdCanChange;
 588                         ml->sml_op = LDAP_MOD_REPLACE;
 589 #ifdef SLAP_MOD_INTERNAL
 590                         ml->sml_flags = SLAP_MOD_INTERNAL;
 591 #endif
 592                                                 ml->sml_numvals = 1;
 593                         ml->sml_values = keys;
 594                         ml->sml_nvalues = NULL;
 595                 }
 596         }
 597 #endif /* DO_SAMBA */
 598         be_entry_release_r( op, e );
 599
 600         return SLAP_CB_CONTINUE;
 601 }
 602
 603 static slap_overinst smbk5pwd;
 604
 605 /* back-config stuff */
 606 enum {
 607         PC_SMB_MUST_CHANGE = 1,
 608         PC_SMB_CAN_CHANGE,
 609         PC_SMB_ENABLE
 610 };
 611
 612 static ConfigDriver smbk5pwd_cf_func;
 613
 614 /*
 615  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 616  */
 617
 618 static ConfigTable smbk5pwd_cfats[] = {
 619         { "smbk5pwd-enable", "arg",
 620                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 621                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 622                 "DESC 'Modules to be enabled' "
 623                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 624         { "smbk5pwd-must-change", "time",
 625                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 626                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 627                 "DESC 'Credentials validity interval' "
 628                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 629         { "smbk5pwd-can-change", "time",
 630                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 631                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 632                 "DESC 'Credentials minimum validity interval' "
 633                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 634
 635         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 636 };
 637
 638 static ConfigOCs smbk5pwd_cfocs[] = {
 639         { "( OLcfgCtOc:1.1 "
 640                 "NAME 'olcSmbK5PwdConfig' "
 641                 "DESC 'smbk5pwd overlay configuration' "
 642                 "SUP olcOverlayConfig "
 643                 "MAY ( "
 644                         "olcSmbK5PwdEnable "
 645                         "$ olcSmbK5PwdMustChange "
 646                         "$ olcSmbK5PwdCanChange "
 647                 ") )", Cft_Overlay, smbk5pwd_cfats },
 648
 649         { NULL, 0, NULL }
 650 };
 651
 652 /*
 653  * add here other functionalities; handle their initialization
 654  * as appropriate in smbk5pwd_modules_init().
 655  */
 656 static slap_verbmasks smbk5pwd_modules[] = {
 657         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 658         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 659         { BER_BVNULL,                   -1 }
 660 };
 661
 662 static int
 663 smbk5pwd_cf_func( ConfigArgs *c )
 664 {
 665         slap_overinst   *on = (slap_overinst *)c->bi;
 666
 667         int             rc = 0;
 668         smbk5pwd_t      *pi = on->on_bi.bi_private;
 669
 670         if ( c->op == SLAP_CONFIG_EMIT ) {
 671                 switch( c->type ) {
 672                 case PC_SMB_MUST_CHANGE:
 673 #ifdef DO_SAMBA
 674                         c->value_int = pi->smb_must_change;
 675 #else /* ! DO_SAMBA */
 676                         c->value_int = 0;
 677 #endif /* ! DO_SAMBA */
 678                         break;
 679
 680                 case PC_SMB_CAN_CHANGE:
 681 #ifdef DO_SAMBA
 682                         c->value_int = pi->smb_can_change;
 683 #else /* ! DO_SAMBA */
 684                         c->value_int = 0;
 685 #endif /* ! DO_SAMBA */
 686                         break;
 687
 688                 case PC_SMB_ENABLE:
 689                         c->rvalue_vals = NULL;
 690                         if ( pi->mode ) {
 691                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 692                                 if ( c->rvalue_vals == NULL ) {
 693                                         rc = 1;
 694                                 }
 695                         }
 696                         break;
 697
 698                 default:
 699                         assert( 0 );
 700                         rc = 1;
 701                 }
 702                 return rc;
 703
 704         } else if ( c->op == LDAP_MOD_DELETE ) {
 705                 switch( c->type ) {
 706                 case PC_SMB_MUST_CHANGE:
 707                         break;
 708
 709                 case PC_SMB_CAN_CHANGE:
 710                         break;
 711
 712                 case PC_SMB_ENABLE:
 713                         if ( !c->line ) {
 714                                 pi->mode = 0;
 715
 716                         } else {
 717                                 slap_mask_t     m;
 718
 719                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 720                                 pi->mode &= ~m;
 721                         }
 722                         break;
 723
 724                 default:
 725                         assert( 0 );
 726                         rc = 1;
 727                 }
 728                 return rc;
 729         }
 730
 731         switch( c->type ) {
 732         case PC_SMB_MUST_CHANGE:
 733 #ifdef DO_SAMBA
 734                 if ( c->value_int < 0 ) {
 735                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 736                                 "<%s> invalid negative value \"%d\".",
 737                                 c->log, c->argv[ 0 ], 0 );
 738                         return 1;
 739                 }
 740                 pi->smb_must_change = c->value_int;
 741 #else /* ! DO_SAMBA */
 742                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 743                         "<%s> only meaningful "
 744                         "when compiled with -DDO_SAMBA.\n",
 745                         c->log, c->argv[ 0 ], 0 );
 746                 return 1;
 747 #endif /* ! DO_SAMBA */
 748                 break;
 749
 750         case PC_SMB_CAN_CHANGE:
 751 #ifdef DO_SAMBA
 752                 if ( c->value_int < 0 ) {
 753                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 754                                 "<%s> invalid negative value \"%d\".",
 755                                 c->log, c->argv[ 0 ], 0 );
 756                         return 1;
 757                 }
 758                 pi->smb_can_change = c->value_int;
 759 #else /* ! DO_SAMBA */
 760                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 761                         "<%s> only meaningful "
 762                         "when compiled with -DDO_SAMBA.\n",
 763                         c->log, c->argv[ 0 ], 0 );
 764                 return 1;
 765 #endif /* ! DO_SAMBA */
 766                 break;
 767
 768         case PC_SMB_ENABLE: {
 769                 slap_mask_t     mode = pi->mode, m;
 770
 771                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 772                 if ( rc > 0 ) {
 773                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 774                                 "<%s> unknown module \"%s\".\n",
 775                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 776                         return 1;
 777                 }
 778
 779                 /* we can hijack the smbk5pwd_t structure because
 780                  * from within the configuration, this is the only
 781                  * active thread. */
 782                 pi->mode |= m;
 783
 784 #ifndef DO_KRB5
 785                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 786                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 787                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 788                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 789                         pi->mode = mode;
 790                         return 1;
 791                 }
 792 #endif /* ! DO_KRB5 */
 793
 794 #ifndef DO_SAMBA
 795                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 796                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 797                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 798                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 799                         pi->mode = mode;
 800                         return 1;
 801                 }
 802 #endif /* ! DO_SAMBA */
 803
 804                 {
 805                         BackendDB       db = *c->be;
 806
 807                         /* Re-initialize the module, because
 808                          * the configuration might have changed */
 809                         db.bd_info = (BackendInfo *)on;
 810                         rc = smbk5pwd_modules_init( pi );
 811                         if ( rc ) {
 812                                 pi->mode = mode;
 813                                 return 1;
 814                         }
 815                 }
 816
 817                 } break;
 818
 819         default:
 820                 assert( 0 );
 821                 return 1;
 822         }
 823         return rc;
 824 }
 825
 826 static int
 827 smbk5pwd_modules_init( smbk5pwd_t *pi )
 828 {
 829         static struct {
 830                 const char              *name;
 831                 AttributeDescription    **adp;
 832         }
 833 #ifdef DO_KRB5
 834         krb5_ad[] = {
 835                 { "krb5Key",                    &ad_krb5Key },
 836                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 837                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 838                 { NULL }
 839         },
 840 #endif /* DO_KRB5 */
 841 #ifdef DO_SAMBA
 842         samba_ad[] = {
 843                 { "sambaLMPassword",            &ad_sambaLMPassword },
 844                 { "sambaNTPassword",            &ad_sambaNTPassword },
 845                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 846                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 847                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 848                 { NULL }
 849         },
 850 #endif /* DO_SAMBA */
 851         dummy_ad;
 852
 853         /* this is to silence the unused var warning */
 854         dummy_ad.name = NULL;
 855
 856 #ifdef DO_KRB5
 857         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 858                 krb5_error_code ret;
 859                 extern HDB      *_kadm5_s_get_db(void *);
 860
 861                 int             i, rc;
 862
 863                 /* Make sure all of our necessary schema items are loaded */
 864                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 865                 if ( !oc_krb5KDCEntry ) {
 866                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 867                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 868                                 0, 0, 0 );
 869                         return -1;
 870                 }
 871
 872                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 873                         const char      *text;
 874
 875                         *(krb5_ad[ i ].adp) = NULL;
 876
 877                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 878                         if ( rc != LDAP_SUCCESS ) {
 879                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 880                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 881                                         krb5_ad[ i ].name, text, rc );
 882                                 oc_krb5KDCEntry = NULL;
 883                                 return rc;
 884                         }
 885                 }
 886
 887                 /* Initialize Kerberos context */
 888                 ret = krb5_init_context(&context);
 889                 if (ret) {
 890                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 891                                 "unable to initialize krb5 context (%d).\n",
 892                                 ret, 0, 0 );
 893                         oc_krb5KDCEntry = NULL;
 894                         return -1;
 895                 }
 896
 897                 ret = kadm5_s_init_with_password_ctx( context,
 898                         KADM5_ADMIN_SERVICE,
 899                         NULL,
 900                         KADM5_ADMIN_SERVICE,
 901                         &conf, 0, 0, &kadm_context );
 902                 if (ret) {
 903                         char *err_str, *err_msg = "<unknown error>";
 904                         err_str = krb5_get_error_string( context );
 905                         if (!err_str)
 906                                 err_msg = krb5_get_err_text( context, ret );
 907                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 908                                 "unable to initialize krb5 admin context: %s (%d).\n",
 909                                 err_str ? err_str : err_msg, ret, 0 );
 910                         if (err_str)
 911                                 krb5_free_error_string( context, err_str );
 912                         krb5_free_context( context );
 913                         oc_krb5KDCEntry = NULL;
 914                         return -1;
 915                 }
 916
 917                 db = _kadm5_s_get_db( kadm_context );
 918         }
 919 #endif /* DO_KRB5 */
 920
 921 #ifdef DO_SAMBA
 922         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 923                 int             i, rc;
 924
 925                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 926                 if ( !oc_sambaSamAccount ) {
 927                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 928                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 929                                 0, 0, 0 );
 930                         return -1;
 931                 }
 932
 933                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 934                         const char      *text;
 935
 936                         *(samba_ad[ i ].adp) = NULL;
 937
 938                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 939                         if ( rc != LDAP_SUCCESS ) {
 940                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 941                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 942                                         samba_ad[ i ].name, text, rc );
 943                                 oc_sambaSamAccount = NULL;
 944                                 return rc;
 945                         }
 946                 }
 947         }
 948 #endif /* DO_SAMBA */
 949
 950         return 0;
 951 }
 952
 953 static int
 954 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
 955 {
 956         slap_overinst   *on = (slap_overinst *)be->bd_info;
 957         smbk5pwd_t      *pi;
 958
 959         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 960         if ( pi == NULL ) {
 961                 return 1;
 962         }
 963         on->on_bi.bi_private = (void *)pi;
 964
 965         return 0;
 966 }
 967
 968 static int
 969 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
 970 {
 971         slap_overinst   *on = (slap_overinst *)be->bd_info;
 972         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 973
 974         int     rc;
 975
 976         if ( pi->mode == 0 ) {
 977                 pi->mode = SMBK5PWD_F_ALL;
 978         }
 979
 980         rc = smbk5pwd_modules_init( pi );
 981         if ( rc ) {
 982                 return rc;
 983         }
 984
 985         return 0;
 986 }
 987
 988 static int
 989 smbk5pwd_db_destroy(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         if ( pi ) {
 995                 ch_free( pi );
 996         }
 997
 998         return 0;
 999 }
1000
1001 int
1002 smbk5pwd_initialize(void)
1003 {
1004         int             rc;
1005
1006         smbk5pwd.on_bi.bi_type = "smbk5pwd";
1007
1008         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1009         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1010         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1011
1012         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1013
1014 #ifdef DO_KRB5
1015         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1016
1017         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1018 #endif
1019
1020         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1021
1022         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1023         if ( rc ) {
1024                 return rc;
1025         }
1026
1027         return overlay_register( &smbk5pwd );
1028 }
1029
1030 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1031 int init_module(int argc, char *argv[]) {
1032         return smbk5pwd_initialize();
1033 }
1034 #endif
1035
1036 #endif /* defined(SLAPD_OVER_SMBK5PWD) */