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 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2004-2011 The OpenLDAP Foundation.
   6  * Portions Copyright 2004-2005 by Howard Chu, Symas Corp.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * Support for table-driven configuration added by Pierangelo Masarati.
  19  * Support for sambaPwdMustChange and sambaPwdCanChange added by Marco D'Ettorre.
  20  */
  21
  22 #include <portable.h>
  23
  24 #ifndef SLAPD_OVER_SMBK5PWD
  25 #define SLAPD_OVER_SMBK5PWD SLAPD_MOD_DYNAMIC
  26 #endif
  27
  28 #ifdef SLAPD_OVER_SMBK5PWD
  29
  30 #include <slap.h>
  31 #include <ac/errno.h>
  32 #include <ac/string.h>
  33
  34 #include "config.h"
  35
  36 #ifdef DO_KRB5
  37 #include <lber.h>
  38 #include <lber_pvt.h>
  39 #include <lutil.h>
  40
  41 /* make ASN1_MALLOC_ENCODE use our allocator */
  42 #define malloc  ch_malloc
  43
  44 #include <krb5.h>
  45 #include <kadm5/admin.h>
  46 #include <hdb.h>
  47
  48 #ifndef HDB_INTERFACE_VERSION
  49 #define HDB_MASTER_KEY_SET      master_key_set
  50 #else
  51 #define HDB_MASTER_KEY_SET      hdb_master_key_set
  52 #endif
  53
  54 static krb5_context context;
  55 static void *kadm_context;
  56 static kadm5_config_params conf;
  57 static HDB *db;
  58
  59 static AttributeDescription *ad_krb5Key;
  60 static AttributeDescription *ad_krb5KeyVersionNumber;
  61 static AttributeDescription *ad_krb5PrincipalName;
  62 static AttributeDescription *ad_krb5ValidEnd;
  63 static ObjectClass *oc_krb5KDCEntry;
  64 #endif
  65
  66 #ifdef DO_SAMBA
  67 #ifdef HAVE_GNUTLS
  68 #include <gcrypt.h>
  69 typedef unsigned char DES_cblock[8];
  70 #else
  71 #include <openssl/des.h>
  72 #include <openssl/md4.h>
  73 #endif
  74 #include "ldap_utf8.h"
  75
  76 static AttributeDescription *ad_sambaLMPassword;
  77 static AttributeDescription *ad_sambaNTPassword;
  78 static AttributeDescription *ad_sambaPwdLastSet;
  79 static AttributeDescription *ad_sambaPwdMustChange;
  80 static AttributeDescription *ad_sambaPwdCanChange;
  81 static ObjectClass *oc_sambaSamAccount;
  82 #endif
  83
  84 /* Per-instance configuration information */
  85 typedef struct smbk5pwd_t {
  86         unsigned        mode;
  87 #define SMBK5PWD_F_KRB5         (0x1U)
  88 #define SMBK5PWD_F_SAMBA        (0x2U)
  89
  90 #define SMBK5PWD_DO_KRB5(pi)    ((pi)->mode & SMBK5PWD_F_KRB5)
  91 #define SMBK5PWD_DO_SAMBA(pi)   ((pi)->mode & SMBK5PWD_F_SAMBA)
  92
  93 #ifdef DO_KRB5
  94         /* nothing yet */
  95 #endif
  96
  97 #ifdef DO_SAMBA
  98         /* How many seconds before forcing a password change? */
  99         time_t  smb_must_change;
 100         /* How many seconds after allowing a password change? */
 101         time_t  smb_can_change;
 102 #endif
 103 } smbk5pwd_t;
 104
 105 static const unsigned SMBK5PWD_F_ALL    =
 106         0
 107 #ifdef DO_KRB5
 108         | SMBK5PWD_F_KRB5
 109 #endif
 110 #ifdef DO_SAMBA
 111         | SMBK5PWD_F_SAMBA
 112 #endif
 113 ;
 114
 115 static int smbk5pwd_modules_init( smbk5pwd_t *pi );
 116
 117 #ifdef DO_SAMBA
 118 static const char hex[] = "0123456789abcdef";
 119
 120 /* From liblutil/passwd.c... */
 121 static void lmPasswd_to_key(
 122         const char *lmPasswd,
 123         DES_cblock *key)
 124 {
 125         const unsigned char *lpw = (const unsigned char *)lmPasswd;
 126         unsigned char *k = (unsigned char *)key;
 127
 128         /* make room for parity bits */
 129         k[0] = lpw[0];
 130         k[1] = ((lpw[0]&0x01)<<7) | (lpw[1]>>1);
 131         k[2] = ((lpw[1]&0x03)<<6) | (lpw[2]>>2);
 132         k[3] = ((lpw[2]&0x07)<<5) | (lpw[3]>>3);
 133         k[4] = ((lpw[3]&0x0F)<<4) | (lpw[4]>>4);
 134         k[5] = ((lpw[4]&0x1F)<<3) | (lpw[5]>>5);
 135         k[6] = ((lpw[5]&0x3F)<<2) | (lpw[6]>>6);
 136         k[7] = ((lpw[6]&0x7F)<<1);
 137
 138 #ifdef HAVE_OPENSSL
 139         des_set_odd_parity( key );
 140 #endif
 141 }
 142
 143 #define MAX_PWLEN 256
 144 #define HASHLEN 16
 145
 146 static void hexify(
 147         const char in[HASHLEN],
 148         struct berval *out
 149 )
 150 {
 151         int i;
 152         char *a;
 153         unsigned char *b;
 154
 155         out->bv_val = ch_malloc(HASHLEN*2 + 1);
 156         out->bv_len = HASHLEN*2;
 157
 158         a = out->bv_val;
 159         b = (unsigned char *)in;
 160         for (i=0; i<HASHLEN; i++) {
 161                 *a++ = hex[*b >> 4];
 162                 *a++ = hex[*b++ & 0x0f];
 163         }
 164         *a++ = '\0';
 165 }
 166
 167 static void lmhash(
 168         struct berval *passwd,
 169         struct berval *hash
 170 )
 171 {
 172         char UcasePassword[15];
 173         DES_cblock key;
 174         DES_cblock StdText = "KGS!@#$%";
 175         DES_cblock hbuf[2];
 176 #ifdef HAVE_OPENSSL
 177         DES_key_schedule schedule;
 178 #elif defined(HAVE_GNUTLS)
 179         gcry_cipher_hd_t h = NULL;
 180         gcry_error_t err;
 181
 182         err = gcry_cipher_open( &h, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_CBC, 0 );
 183         if ( err ) return;
 184 #endif
 185
 186         strncpy( UcasePassword, passwd->bv_val, 14 );
 187         UcasePassword[14] = '\0';
 188         ldap_pvt_str2upper( UcasePassword );
 189
 190         lmPasswd_to_key( UcasePassword, &key );
 191 #ifdef HAVE_GNUTLS
 192         err = gcry_cipher_setkey( h, &key, sizeof(key) );
 193         if ( err == 0 ) {
 194                 err = gcry_cipher_encrypt( h, &hbuf[0], sizeof(key), &StdText, sizeof(key) );
 195                 if ( err == 0 ) {
 196                         gcry_cipher_reset( h );
 197                         lmPasswd_to_key( &UcasePassword[7], &key );
 198                         err = gcry_cipher_setkey( h, &key, sizeof(key) );
 199                         if ( err == 0 ) {
 200                                 err = gcry_cipher_encrypt( h, &hbuf[1], sizeof(key), &StdText, sizeof(key) );
 201                         }
 202                 }
 203                 gcry_cipher_close( h );
 204         }
 205 #elif defined(HAVE_OPENSSL)
 206         des_set_key_unchecked( &key, schedule );
 207         des_ecb_encrypt( &StdText, &hbuf[0], schedule , DES_ENCRYPT );
 208
 209         lmPasswd_to_key( &UcasePassword[7], &key );
 210         des_set_key_unchecked( &key, schedule );
 211         des_ecb_encrypt( &StdText, &hbuf[1], schedule , DES_ENCRYPT );
 212 #endif
 213
 214         hexify( (char *)hbuf, hash );
 215 }
 216
 217 static void nthash(
 218         struct berval *passwd,
 219         struct berval *hash
 220 )
 221 {
 222         /* Windows currently only allows 14 character passwords, but
 223          * may support up to 256 in the future. We assume this means
 224          * 256 UCS2 characters, not 256 bytes...
 225          */
 226         char hbuf[HASHLEN];
 227 #ifdef HAVE_OPENSSL
 228         MD4_CTX ctx;
 229 #endif
 230
 231         if (passwd->bv_len > MAX_PWLEN*2)
 232                 passwd->bv_len = MAX_PWLEN*2;
 233
 234 #ifdef HAVE_OPENSSL
 235         MD4_Init( &ctx );
 236         MD4_Update( &ctx, passwd->bv_val, passwd->bv_len );
 237         MD4_Final( (unsigned char *)hbuf, &ctx );
 238 #elif defined(HAVE_GNUTLS)
 239         gcry_md_hash_buffer(GCRY_MD_MD4, hbuf, passwd->bv_val, passwd->bv_len );
 240 #endif
 241
 242         hexify( hbuf, hash );
 243 }
 244 #endif /* DO_SAMBA */
 245
 246 #ifdef DO_KRB5
 247
 248 static int smbk5pwd_op_cleanup(
 249         Operation *op,
 250         SlapReply *rs )
 251 {
 252         slap_callback *cb;
 253
 254         /* clear out the current key */
 255         ldap_pvt_thread_pool_setkey( op->o_threadctx, smbk5pwd_op_cleanup,
 256                 NULL, 0, NULL, NULL );
 257
 258         /* free the callback */
 259         cb = op->o_callback;
 260         op->o_callback = cb->sc_next;
 261         op->o_tmpfree( cb, op->o_tmpmemctx );
 262         return 0;
 263 }
 264
 265 static int smbk5pwd_op_bind(
 266         Operation *op,
 267         SlapReply *rs )
 268 {
 269         /* If this is a simple Bind, stash the Op pointer so our chk
 270          * function can find it. Set a cleanup callback to clear it
 271          * out when the Bind completes.
 272          */
 273         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE ) {
 274                 slap_callback *cb;
 275                 ldap_pvt_thread_pool_setkey( op->o_threadctx,
 276                         smbk5pwd_op_cleanup, op, 0, NULL, NULL );
 277                 cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
 278                 cb->sc_cleanup = smbk5pwd_op_cleanup;
 279                 cb->sc_next = op->o_callback;
 280                 op->o_callback = cb;
 281         }
 282         return SLAP_CB_CONTINUE;
 283 }
 284
 285 static LUTIL_PASSWD_CHK_FUNC k5key_chk;
 286 static LUTIL_PASSWD_HASH_FUNC k5key_hash;
 287 static const struct berval k5key_scheme = BER_BVC("{K5KEY}");
 288
 289 /* This password scheme stores no data in the userPassword attribute
 290  * other than the scheme name. It assumes the invoking entry is a
 291  * krb5KDCentry and compares the passed-in credentials against the
 292  * krb5Key attribute. The krb5Key may be multi-valued, but they are
 293  * simply multiple keytypes generated from the same input string, so
 294  * only the first value needs to be compared here.
 295  *
 296  * Since the lutil_passwd API doesn't pass the Entry object in, we
 297  * have to fetch it ourselves in order to get access to the other
 298  * attributes. We accomplish this with the help of the overlay's Bind
 299  * function, which stores the current Operation pointer in thread-specific
 300  * storage so we can retrieve it here. The Operation provides all
 301  * the necessary context for us to get Entry from the database.
 302  */
 303 static int k5key_chk(
 304         const struct berval *sc,
 305         const struct berval *passwd,
 306         const struct berval *cred,
 307         const char **text )
 308 {
 309         void *ctx, *op_tmp;
 310         Operation *op;
 311         int rc;
 312         Entry *e;
 313         Attribute *a;
 314         krb5_error_code ret;
 315         krb5_keyblock key;
 316         krb5_salt salt;
 317         hdb_entry ent;
 318
 319         /* Find our thread context, find our Operation */
 320         ctx = ldap_pvt_thread_pool_context();
 321
 322         if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, &op_tmp, NULL )
 323                  || !op_tmp )
 324                 return LUTIL_PASSWD_ERR;
 325         op = op_tmp;
 326
 327         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 328         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 329
 330         rc = LUTIL_PASSWD_ERR;
 331         do {
 332                 size_t l;
 333                 Key ekey = {0};
 334
 335                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 336                 if (!a ) break;
 337
 338                 memset( &ent, 0, sizeof(ent) );
 339                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 340                 if ( ret ) break;
 341
 342                 a = attr_find( e->e_attrs, ad_krb5ValidEnd );
 343                 if (a) {
 344                         struct lutil_tm tm;
 345                         struct lutil_timet tt;
 346                         if ( lutil_parsetime( a->a_vals[0].bv_val, &tm ) == 0 &&
 347                                 lutil_tm2time( &tm, &tt ) == 0 && tt.tt_usec < op->o_time ) {
 348                                 /* Account is expired */
 349                                 rc = LUTIL_PASSWD_ERR;
 350                                 break;
 351                         }
 352                 }
 353
 354                 krb5_get_pw_salt( context, ent.principal, &salt );
 355                 krb5_free_principal( context, ent.principal );
 356
 357                 a = attr_find( e->e_attrs, ad_krb5Key );
 358                 if ( !a ) break;
 359
 360                 ent.keys.len = 1;
 361                 ent.keys.val = &ekey;
 362                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 363                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 364                 if ( db->HDB_MASTER_KEY_SET )
 365                         hdb_unseal_keys( context, db, &ent );
 366
 367                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 368                         salt, &key );
 369
 370                 krb5_free_salt( context, salt );
 371
 372                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 373                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 374
 375                 krb5_free_keyblock_contents( context, &key );
 376                 krb5_free_keyblock_contents( context, &ekey.key );
 377
 378         } while(0);
 379         be_entry_release_r( op, e );
 380         return rc;
 381 }
 382
 383 static int k5key_hash(
 384         const struct berval *scheme,
 385         const struct berval *passwd,
 386         struct berval *hash,
 387         const char **text )
 388 {
 389         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 390         return LUTIL_PASSWD_OK;
 391 }
 392 #endif /* DO_KRB5 */
 393
 394 static int smbk5pwd_exop_passwd(
 395         Operation *op,
 396         SlapReply *rs )
 397 {
 398         int rc;
 399         req_pwdexop_s *qpw = &op->oq_pwdexop;
 400         Entry *e;
 401         Modifications *ml;
 402         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 403         smbk5pwd_t *pi = on->on_bi.bi_private;
 404         char term;
 405
 406         /* Not the operation we expected, pass it on... */
 407         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 408                 return SLAP_CB_CONTINUE;
 409         }
 410
 411         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 412         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 413         if ( rc != LDAP_SUCCESS ) return rc;
 414
 415         term = qpw->rs_new.bv_val[qpw->rs_new.bv_len];
 416         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0';
 417
 418 #ifdef DO_KRB5
 419         /* Kerberos stuff */
 420         do {
 421                 krb5_error_code ret;
 422                 hdb_entry ent;
 423                 struct berval *keys;
 424                 size_t nkeys;
 425                 int kvno, i;
 426                 Attribute *a;
 427
 428                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 429
 430                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 431
 432                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 433                 if ( !a ) break;
 434
 435                 memset( &ent, 0, sizeof(ent) );
 436                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 437                 if ( ret ) break;
 438
 439                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 440                 kvno = 0;
 441                 if ( a ) {
 442                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 443                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 444                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 445                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 446                         }
 447
 448                 } else {
 449                         /* shouldn't happen, this is a required attr */
 450                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 451                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 452                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 453                 }
 454
 455                 ret = hdb_generate_key_set_password(context, ent.principal,
 456                         qpw->rs_new.bv_val, &ent.keys.val, &nkeys);
 457                 ent.keys.len = nkeys;
 458                 hdb_seal_keys(context, db, &ent);
 459                 krb5_free_principal( context, ent.principal );
 460
 461                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 462
 463                 for (i = 0; i < ent.keys.len; i++) {
 464                         unsigned char *buf;
 465                         size_t len;
 466
 467                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 468                         if (ret != 0)
 469                                 break;
 470
 471                         keys[i].bv_val = (char *)buf;
 472                         keys[i].bv_len = len;
 473                 }
 474                 BER_BVZERO( &keys[i] );
 475
 476                 hdb_free_keys(context, ent.keys.len, ent.keys.val);
 477
 478                 if ( i != ent.keys.len ) {
 479                         ber_bvarray_free( keys );
 480                         break;
 481                 }
 482
 483                 ml = ch_malloc(sizeof(Modifications));
 484                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 485                 ml->sml_next = qpw->rs_mods;
 486                 qpw->rs_mods = ml;
 487
 488                 ml->sml_desc = ad_krb5Key;
 489                 ml->sml_op = LDAP_MOD_REPLACE;
 490 #ifdef SLAP_MOD_INTERNAL
 491                 ml->sml_flags = SLAP_MOD_INTERNAL;
 492 #endif
 493                 ml->sml_numvals = i;
 494                 ml->sml_values = keys;
 495                 ml->sml_nvalues = NULL;
 496
 497                 ml = ch_malloc(sizeof(Modifications));
 498                 ml->sml_next = qpw->rs_mods;
 499                 qpw->rs_mods = ml;
 500
 501                 ml->sml_desc = ad_krb5KeyVersionNumber;
 502                 ml->sml_op = LDAP_MOD_REPLACE;
 503 #ifdef SLAP_MOD_INTERNAL
 504                 ml->sml_flags = SLAP_MOD_INTERNAL;
 505 #endif
 506                 ml->sml_numvals = 1;
 507                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 508                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 509                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 510                         "%d", kvno+1 );
 511                 BER_BVZERO( &ml->sml_values[1] );
 512                 ml->sml_nvalues = NULL;
 513         } while ( 0 );
 514 #endif /* DO_KRB5 */
 515
 516 #ifdef DO_SAMBA
 517         /* Samba stuff */
 518         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 519                 struct berval *keys;
 520                 ber_len_t j,l;
 521                 wchar_t *wcs, wc;
 522                 char *c, *d;
 523                 struct berval pwd;
 524
 525                 /* Expand incoming UTF8 string to UCS4 */
 526                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 527                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 528
 529                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 530
 531                 /* Truncate UCS4 to UCS2 */
 532                 c = (char *)wcs;
 533                 for (j=0; j<l; j++) {
 534                         wc = wcs[j];
 535                         *c++ = wc & 0xff;
 536                         *c++ = (wc >> 8) & 0xff;
 537                 }
 538                 *c++ = 0;
 539                 pwd.bv_val = (char *)wcs;
 540                 pwd.bv_len = l * 2;
 541
 542                 ml = ch_malloc(sizeof(Modifications));
 543                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 544                 ml->sml_next = qpw->rs_mods;
 545                 qpw->rs_mods = ml;
 546
 547                 keys = ch_malloc( 2 * sizeof(struct berval) );
 548                 BER_BVZERO( &keys[1] );
 549                 nthash( &pwd, keys );
 550
 551                 ml->sml_desc = ad_sambaNTPassword;
 552                 ml->sml_op = LDAP_MOD_REPLACE;
 553 #ifdef SLAP_MOD_INTERNAL
 554                 ml->sml_flags = SLAP_MOD_INTERNAL;
 555 #endif
 556                 ml->sml_numvals = 1;
 557                 ml->sml_values = keys;
 558                 ml->sml_nvalues = NULL;
 559
 560                 /* Truncate UCS2 to 8-bit ASCII */
 561                 c = pwd.bv_val+1;
 562                 d = pwd.bv_val+2;
 563                 for (j=1; j<l; j++) {
 564                         *c++ = *d++;
 565                         d++;
 566                 }
 567                 pwd.bv_len /= 2;
 568                 pwd.bv_val[pwd.bv_len] = '\0';
 569
 570                 ml = ch_malloc(sizeof(Modifications));
 571                 ml->sml_next = qpw->rs_mods;
 572                 qpw->rs_mods = ml;
 573
 574                 keys = ch_malloc( 2 * sizeof(struct berval) );
 575                 BER_BVZERO( &keys[1] );
 576                 lmhash( &pwd, keys );
 577
 578                 ml->sml_desc = ad_sambaLMPassword;
 579                 ml->sml_op = LDAP_MOD_REPLACE;
 580 #ifdef SLAP_MOD_INTERNAL
 581                 ml->sml_flags = SLAP_MOD_INTERNAL;
 582 #endif
 583                 ml->sml_numvals = 1;
 584                 ml->sml_values = keys;
 585                 ml->sml_nvalues = NULL;
 586
 587                 ch_free(wcs);
 588
 589                 ml = ch_malloc(sizeof(Modifications));
 590                 ml->sml_next = qpw->rs_mods;
 591                 qpw->rs_mods = ml;
 592
 593                 keys = ch_malloc( 2 * sizeof(struct berval) );
 594                 keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 595                 keys[0].bv_len = snprintf(keys[0].bv_val,
 596                         LDAP_PVT_INTTYPE_CHARS(long),
 597                         "%ld", slap_get_time());
 598                 BER_BVZERO( &keys[1] );
 599
 600                 ml->sml_desc = ad_sambaPwdLastSet;
 601                 ml->sml_op = LDAP_MOD_REPLACE;
 602 #ifdef SLAP_MOD_INTERNAL
 603                 ml->sml_flags = SLAP_MOD_INTERNAL;
 604 #endif
 605                 ml->sml_numvals = 1;
 606                 ml->sml_values = keys;
 607                 ml->sml_nvalues = NULL;
 608
 609                 if (pi->smb_must_change)
 610                 {
 611                         ml = ch_malloc(sizeof(Modifications));
 612                         ml->sml_next = qpw->rs_mods;
 613                         qpw->rs_mods = ml;
 614
 615                         keys = ch_malloc( 2 * sizeof(struct berval) );
 616                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 617                         keys[0].bv_len = snprintf(keys[0].bv_val,
 618                                         LDAP_PVT_INTTYPE_CHARS(long),
 619                                         "%ld", slap_get_time() + pi->smb_must_change);
 620                         BER_BVZERO( &keys[1] );
 621
 622                         ml->sml_desc = ad_sambaPwdMustChange;
 623                         ml->sml_op = LDAP_MOD_REPLACE;
 624 #ifdef SLAP_MOD_INTERNAL
 625                         ml->sml_flags = SLAP_MOD_INTERNAL;
 626 #endif
 627                         ml->sml_numvals = 1;
 628                         ml->sml_values = keys;
 629                         ml->sml_nvalues = NULL;
 630                 }
 631
 632                 if (pi->smb_can_change)
 633                 {
 634                         ml = ch_malloc(sizeof(Modifications));
 635                         ml->sml_next = qpw->rs_mods;
 636                         qpw->rs_mods = ml;
 637
 638                         keys = ch_malloc( 2 * sizeof(struct berval) );
 639                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 640                         keys[0].bv_len = snprintf(keys[0].bv_val,
 641                                         LDAP_PVT_INTTYPE_CHARS(long),
 642                                         "%ld", slap_get_time() + pi->smb_can_change);
 643                         BER_BVZERO( &keys[1] );
 644
 645                         ml->sml_desc = ad_sambaPwdCanChange;
 646                         ml->sml_op = LDAP_MOD_REPLACE;
 647 #ifdef SLAP_MOD_INTERNAL
 648                         ml->sml_flags = SLAP_MOD_INTERNAL;
 649 #endif
 650                         ml->sml_numvals = 1;
 651                         ml->sml_values = keys;
 652                         ml->sml_nvalues = NULL;
 653                 }
 654         }
 655 #endif /* DO_SAMBA */
 656         be_entry_release_r( op, e );
 657         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term;
 658
 659         return SLAP_CB_CONTINUE;
 660 }
 661
 662 static slap_overinst smbk5pwd;
 663
 664 /* back-config stuff */
 665 enum {
 666         PC_SMB_MUST_CHANGE = 1,
 667         PC_SMB_CAN_CHANGE,
 668         PC_SMB_ENABLE
 669 };
 670
 671 static ConfigDriver smbk5pwd_cf_func;
 672
 673 /*
 674  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 675  */
 676
 677 static ConfigTable smbk5pwd_cfats[] = {
 678         { "smbk5pwd-enable", "arg",
 679                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 680                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 681                 "DESC 'Modules to be enabled' "
 682                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 683         { "smbk5pwd-must-change", "time",
 684                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 685                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 686                 "DESC 'Credentials validity interval' "
 687                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 688         { "smbk5pwd-can-change", "time",
 689                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 690                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 691                 "DESC 'Credentials minimum validity interval' "
 692                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 693
 694         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 695 };
 696
 697 static ConfigOCs smbk5pwd_cfocs[] = {
 698         { "( OLcfgCtOc:1.1 "
 699                 "NAME 'olcSmbK5PwdConfig' "
 700                 "DESC 'smbk5pwd overlay configuration' "
 701                 "SUP olcOverlayConfig "
 702                 "MAY ( "
 703                         "olcSmbK5PwdEnable "
 704                         "$ olcSmbK5PwdMustChange "
 705                         "$ olcSmbK5PwdCanChange "
 706                 ") )", Cft_Overlay, smbk5pwd_cfats },
 707
 708         { NULL, 0, NULL }
 709 };
 710
 711 /*
 712  * add here other functionalities; handle their initialization
 713  * as appropriate in smbk5pwd_modules_init().
 714  */
 715 static slap_verbmasks smbk5pwd_modules[] = {
 716         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 717         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 718         { BER_BVNULL,                   -1 }
 719 };
 720
 721 static int
 722 smbk5pwd_cf_func( ConfigArgs *c )
 723 {
 724         slap_overinst   *on = (slap_overinst *)c->bi;
 725
 726         int             rc = 0;
 727         smbk5pwd_t      *pi = on->on_bi.bi_private;
 728
 729         if ( c->op == SLAP_CONFIG_EMIT ) {
 730                 switch( c->type ) {
 731                 case PC_SMB_MUST_CHANGE:
 732 #ifdef DO_SAMBA
 733                         c->value_int = pi->smb_must_change;
 734 #else /* ! DO_SAMBA */
 735                         c->value_int = 0;
 736 #endif /* ! DO_SAMBA */
 737                         break;
 738
 739                 case PC_SMB_CAN_CHANGE:
 740 #ifdef DO_SAMBA
 741                         c->value_int = pi->smb_can_change;
 742 #else /* ! DO_SAMBA */
 743                         c->value_int = 0;
 744 #endif /* ! DO_SAMBA */
 745                         break;
 746
 747                 case PC_SMB_ENABLE:
 748                         c->rvalue_vals = NULL;
 749                         if ( pi->mode ) {
 750                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 751                                 if ( c->rvalue_vals == NULL ) {
 752                                         rc = 1;
 753                                 }
 754                         }
 755                         break;
 756
 757                 default:
 758                         assert( 0 );
 759                         rc = 1;
 760                 }
 761                 return rc;
 762
 763         } else if ( c->op == LDAP_MOD_DELETE ) {
 764                 switch( c->type ) {
 765                 case PC_SMB_MUST_CHANGE:
 766                         break;
 767
 768                 case PC_SMB_CAN_CHANGE:
 769                         break;
 770
 771                 case PC_SMB_ENABLE:
 772                         if ( !c->line ) {
 773                                 pi->mode = 0;
 774
 775                         } else {
 776                                 slap_mask_t     m;
 777
 778                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 779                                 pi->mode &= ~m;
 780                         }
 781                         break;
 782
 783                 default:
 784                         assert( 0 );
 785                         rc = 1;
 786                 }
 787                 return rc;
 788         }
 789
 790         switch( c->type ) {
 791         case PC_SMB_MUST_CHANGE:
 792 #ifdef DO_SAMBA
 793                 if ( c->value_int < 0 ) {
 794                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 795                                 "<%s> invalid negative value \"%d\".",
 796                                 c->log, c->argv[ 0 ], 0 );
 797                         return 1;
 798                 }
 799                 pi->smb_must_change = c->value_int;
 800 #else /* ! DO_SAMBA */
 801                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 802                         "<%s> only meaningful "
 803                         "when compiled with -DDO_SAMBA.\n",
 804                         c->log, c->argv[ 0 ], 0 );
 805                 return 1;
 806 #endif /* ! DO_SAMBA */
 807                 break;
 808
 809         case PC_SMB_CAN_CHANGE:
 810 #ifdef DO_SAMBA
 811                 if ( c->value_int < 0 ) {
 812                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 813                                 "<%s> invalid negative value \"%d\".",
 814                                 c->log, c->argv[ 0 ], 0 );
 815                         return 1;
 816                 }
 817                 pi->smb_can_change = c->value_int;
 818 #else /* ! DO_SAMBA */
 819                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 820                         "<%s> only meaningful "
 821                         "when compiled with -DDO_SAMBA.\n",
 822                         c->log, c->argv[ 0 ], 0 );
 823                 return 1;
 824 #endif /* ! DO_SAMBA */
 825                 break;
 826
 827         case PC_SMB_ENABLE: {
 828                 slap_mask_t     mode = pi->mode, m;
 829
 830                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 831                 if ( rc > 0 ) {
 832                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 833                                 "<%s> unknown module \"%s\".\n",
 834                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 835                         return 1;
 836                 }
 837
 838                 /* we can hijack the smbk5pwd_t structure because
 839                  * from within the configuration, this is the only
 840                  * active thread. */
 841                 pi->mode |= m;
 842
 843 #ifndef DO_KRB5
 844                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 845                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 846                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 847                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 848                         pi->mode = mode;
 849                         return 1;
 850                 }
 851 #endif /* ! DO_KRB5 */
 852
 853 #ifndef DO_SAMBA
 854                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 855                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 856                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 857                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 858                         pi->mode = mode;
 859                         return 1;
 860                 }
 861 #endif /* ! DO_SAMBA */
 862
 863                 {
 864                         BackendDB       db = *c->be;
 865
 866                         /* Re-initialize the module, because
 867                          * the configuration might have changed */
 868                         db.bd_info = (BackendInfo *)on;
 869                         rc = smbk5pwd_modules_init( pi );
 870                         if ( rc ) {
 871                                 pi->mode = mode;
 872                                 return 1;
 873                         }
 874                 }
 875
 876                 } break;
 877
 878         default:
 879                 assert( 0 );
 880                 return 1;
 881         }
 882         return rc;
 883 }
 884
 885 static int
 886 smbk5pwd_modules_init( smbk5pwd_t *pi )
 887 {
 888         static struct {
 889                 const char              *name;
 890                 AttributeDescription    **adp;
 891         }
 892 #ifdef DO_KRB5
 893         krb5_ad[] = {
 894                 { "krb5Key",                    &ad_krb5Key },
 895                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 896                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 897                 { "krb5ValidEnd",               &ad_krb5ValidEnd },
 898                 { NULL }
 899         },
 900 #endif /* DO_KRB5 */
 901 #ifdef DO_SAMBA
 902         samba_ad[] = {
 903                 { "sambaLMPassword",            &ad_sambaLMPassword },
 904                 { "sambaNTPassword",            &ad_sambaNTPassword },
 905                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 906                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 907                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 908                 { NULL }
 909         },
 910 #endif /* DO_SAMBA */
 911         dummy_ad;
 912
 913         /* this is to silence the unused var warning */
 914         dummy_ad.name = NULL;
 915
 916 #ifdef DO_KRB5
 917         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 918                 krb5_error_code ret;
 919                 extern HDB      *_kadm5_s_get_db(void *);
 920
 921                 int             i, rc;
 922
 923                 /* Make sure all of our necessary schema items are loaded */
 924                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 925                 if ( !oc_krb5KDCEntry ) {
 926                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 927                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 928                                 0, 0, 0 );
 929                         return -1;
 930                 }
 931
 932                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 933                         const char      *text;
 934
 935                         *(krb5_ad[ i ].adp) = NULL;
 936
 937                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 938                         if ( rc != LDAP_SUCCESS ) {
 939                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 940                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 941                                         krb5_ad[ i ].name, text, rc );
 942                                 oc_krb5KDCEntry = NULL;
 943                                 return rc;
 944                         }
 945                 }
 946
 947                 /* Initialize Kerberos context */
 948                 ret = krb5_init_context(&context);
 949                 if (ret) {
 950                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 951                                 "unable to initialize krb5 context (%d).\n",
 952                                 ret, 0, 0 );
 953                         oc_krb5KDCEntry = NULL;
 954                         return -1;
 955                 }
 956
 957                 ret = kadm5_s_init_with_password_ctx( context,
 958                         KADM5_ADMIN_SERVICE,
 959                         NULL,
 960                         KADM5_ADMIN_SERVICE,
 961                         &conf, 0, 0, &kadm_context );
 962                 if (ret) {
 963                         char *err_str, *err_msg = "<unknown error>";
 964                         err_str = krb5_get_error_string( context );
 965                         if (!err_str)
 966                                 err_msg = (char *)krb5_get_err_text( context, ret );
 967                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 968                                 "unable to initialize krb5 admin context: %s (%d).\n",
 969                                 err_str ? err_str : err_msg, ret, 0 );
 970                         if (err_str)
 971                                 krb5_free_error_string( context, err_str );
 972                         krb5_free_context( context );
 973                         oc_krb5KDCEntry = NULL;
 974                         return -1;
 975                 }
 976
 977                 db = _kadm5_s_get_db( kadm_context );
 978         }
 979 #endif /* DO_KRB5 */
 980
 981 #ifdef DO_SAMBA
 982         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 983                 int             i, rc;
 984
 985                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 986                 if ( !oc_sambaSamAccount ) {
 987                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 988                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 989                                 0, 0, 0 );
 990                         return -1;
 991                 }
 992
 993                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 994                         const char      *text;
 995
 996                         *(samba_ad[ i ].adp) = NULL;
 997
 998                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 999                         if ( rc != LDAP_SUCCESS ) {
1000                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
1001                                         "unable to find \"%s\" attributeType: %s (%d).\n",
1002                                         samba_ad[ i ].name, text, rc );
1003                                 oc_sambaSamAccount = NULL;
1004                                 return rc;
1005                         }
1006                 }
1007         }
1008 #endif /* DO_SAMBA */
1009
1010         return 0;
1011 }
1012
1013 static int
1014 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
1015 {
1016         slap_overinst   *on = (slap_overinst *)be->bd_info;
1017         smbk5pwd_t      *pi;
1018
1019         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
1020         if ( pi == NULL ) {
1021                 return 1;
1022         }
1023         on->on_bi.bi_private = (void *)pi;
1024
1025         return 0;
1026 }
1027
1028 static int
1029 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
1030 {
1031         slap_overinst   *on = (slap_overinst *)be->bd_info;
1032         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
1033
1034         int     rc;
1035
1036         if ( pi->mode == 0 ) {
1037                 pi->mode = SMBK5PWD_F_ALL;
1038         }
1039
1040         rc = smbk5pwd_modules_init( pi );
1041         if ( rc ) {
1042                 return rc;
1043         }
1044
1045         return 0;
1046 }
1047
1048 static int
1049 smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
1050 {
1051         slap_overinst   *on = (slap_overinst *)be->bd_info;
1052         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
1053
1054         if ( pi ) {
1055                 ch_free( pi );
1056         }
1057
1058         return 0;
1059 }
1060
1061 int
1062 smbk5pwd_initialize(void)
1063 {
1064         int             rc;
1065
1066         smbk5pwd.on_bi.bi_type = "smbk5pwd";
1067
1068         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1069         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1070         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1071
1072         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1073
1074 #ifdef DO_KRB5
1075         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1076
1077         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1078 #endif
1079
1080         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1081
1082         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1083         if ( rc ) {
1084                 return rc;
1085         }
1086
1087         return overlay_register( &smbk5pwd );
1088 }
1089
1090 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1091 int init_module(int argc, char *argv[]) {
1092         return smbk5pwd_initialize();
1093 }
1094 #endif
1095
1096 #endif /* defined(SLAPD_OVER_SMBK5PWD) */