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, 0, 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, 0, 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         char term;
 354
 355         /* Not the operation we expected, pass it on... */
 356         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 357                 return SLAP_CB_CONTINUE;
 358         }
 359
 360         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 361         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 362         if ( rc != LDAP_SUCCESS ) return rc;
 363
 364         term = qpw->rs_new.bv_val[qpw->rs_new.bv_len];
 365         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = '\0';
 366
 367 #ifdef DO_KRB5
 368         /* Kerberos stuff */
 369         do {
 370                 krb5_error_code ret;
 371                 hdb_entry ent;
 372                 struct berval *keys;
 373                 int kvno, i;
 374                 Attribute *a;
 375
 376                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 377
 378                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 379
 380                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 381                 if ( !a ) break;
 382
 383                 memset( &ent, 0, sizeof(ent) );
 384                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 385                 if ( ret ) break;
 386
 387                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 388                 kvno = 0;
 389                 if ( a ) {
 390                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 391                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 392                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 393                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 394                         }
 395
 396                 } else {
 397                         /* shouldn't happen, this is a required attr */
 398                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 399                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 400                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 401                 }
 402
 403                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 404                 hdb_seal_keys(context, db, &ent);
 405                 krb5_free_principal( context, ent.principal );
 406
 407                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 408
 409                 for (i = 0; i < ent.keys.len; i++) {
 410                         unsigned char *buf;
 411                         size_t len;
 412
 413                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 414                         if (ret != 0)
 415                                 break;
 416
 417                         keys[i].bv_val = (char *)buf;
 418                         keys[i].bv_len = len;
 419                 }
 420                 BER_BVZERO( &keys[i] );
 421
 422                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 423
 424                 if ( i != ent.keys.len ) {
 425                         ber_bvarray_free( keys );
 426                         break;
 427                 }
 428
 429                 ml = ch_malloc(sizeof(Modifications));
 430                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 431                 ml->sml_next = qpw->rs_mods;
 432                 qpw->rs_mods = ml;
 433
 434                 ml->sml_desc = ad_krb5Key;
 435                 ml->sml_op = LDAP_MOD_REPLACE;
 436 #ifdef SLAP_MOD_INTERNAL
 437                 ml->sml_flags = SLAP_MOD_INTERNAL;
 438 #endif
 439                 ml->sml_numvals = i;
 440                 ml->sml_values = keys;
 441                 ml->sml_nvalues = NULL;
 442
 443                 ml = ch_malloc(sizeof(Modifications));
 444                 ml->sml_next = qpw->rs_mods;
 445                 qpw->rs_mods = ml;
 446
 447                 ml->sml_desc = ad_krb5KeyVersionNumber;
 448                 ml->sml_op = LDAP_MOD_REPLACE;
 449 #ifdef SLAP_MOD_INTERNAL
 450                 ml->sml_flags = SLAP_MOD_INTERNAL;
 451 #endif
 452                 ml->sml_numvals = 1;
 453                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 454                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 455                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 456                         "%d", kvno+1 );
 457                 BER_BVZERO( &ml->sml_values[1] );
 458                 ml->sml_nvalues = NULL;
 459         } while ( 0 );
 460 #endif /* DO_KRB5 */
 461
 462 #ifdef DO_SAMBA
 463         /* Samba stuff */
 464         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 465                 struct berval *keys;
 466                 ber_len_t j,l;
 467                 wchar_t *wcs, wc;
 468                 char *c, *d;
 469                 struct berval pwd;
 470
 471                 /* Expand incoming UTF8 string to UCS4 */
 472                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 473                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 474
 475                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 476
 477                 /* Truncate UCS4 to UCS2 */
 478                 c = (char *)wcs;
 479                 for (j=0; j<l; j++) {
 480                         wc = wcs[j];
 481                         *c++ = wc & 0xff;
 482                         *c++ = (wc >> 8) & 0xff;
 483                 }
 484                 *c++ = 0;
 485                 pwd.bv_val = (char *)wcs;
 486                 pwd.bv_len = l * 2;
 487
 488                 ml = ch_malloc(sizeof(Modifications));
 489                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 490                 ml->sml_next = qpw->rs_mods;
 491                 qpw->rs_mods = ml;
 492
 493                 keys = ch_malloc( 2 * sizeof(struct berval) );
 494                 BER_BVZERO( &keys[1] );
 495                 nthash( &pwd, keys );
 496
 497                 ml->sml_desc = ad_sambaNTPassword;
 498                 ml->sml_op = LDAP_MOD_REPLACE;
 499 #ifdef SLAP_MOD_INTERNAL
 500                 ml->sml_flags = SLAP_MOD_INTERNAL;
 501 #endif
 502                 ml->sml_numvals = 1;
 503                 ml->sml_values = keys;
 504                 ml->sml_nvalues = NULL;
 505
 506                 /* Truncate UCS2 to 8-bit ASCII */
 507                 c = pwd.bv_val+1;
 508                 d = pwd.bv_val+2;
 509                 for (j=1; j<l; j++) {
 510                         *c++ = *d++;
 511                         d++;
 512                 }
 513                 pwd.bv_len /= 2;
 514                 pwd.bv_val[pwd.bv_len] = '\0';
 515
 516                 ml = ch_malloc(sizeof(Modifications));
 517                 ml->sml_next = qpw->rs_mods;
 518                 qpw->rs_mods = ml;
 519
 520                 keys = ch_malloc( 2 * sizeof(struct berval) );
 521                 BER_BVZERO( &keys[1] );
 522                 lmhash( &pwd, keys );
 523
 524                 ml->sml_desc = ad_sambaLMPassword;
 525                 ml->sml_op = LDAP_MOD_REPLACE;
 526 #ifdef SLAP_MOD_INTERNAL
 527                 ml->sml_flags = SLAP_MOD_INTERNAL;
 528 #endif
 529                 ml->sml_numvals = 1;
 530                 ml->sml_values = keys;
 531                 ml->sml_nvalues = NULL;
 532
 533                 ch_free(wcs);
 534
 535                 ml = ch_malloc(sizeof(Modifications));
 536                 ml->sml_next = qpw->rs_mods;
 537                 qpw->rs_mods = ml;
 538
 539                 keys = ch_malloc( 2 * sizeof(struct berval) );
 540                 keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 541                 keys[0].bv_len = snprintf(keys[0].bv_val,
 542                         LDAP_PVT_INTTYPE_CHARS(long),
 543                         "%ld", slap_get_time());
 544                 BER_BVZERO( &keys[1] );
 545
 546                 ml->sml_desc = ad_sambaPwdLastSet;
 547                 ml->sml_op = LDAP_MOD_REPLACE;
 548 #ifdef SLAP_MOD_INTERNAL
 549                 ml->sml_flags = SLAP_MOD_INTERNAL;
 550 #endif
 551                 ml->sml_numvals = 1;
 552                 ml->sml_values = keys;
 553                 ml->sml_nvalues = NULL;
 554
 555                 if (pi->smb_must_change)
 556                 {
 557                         ml = ch_malloc(sizeof(Modifications));
 558                         ml->sml_next = qpw->rs_mods;
 559                         qpw->rs_mods = ml;
 560
 561                         keys = ch_malloc( 2 * sizeof(struct berval) );
 562                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 563                         keys[0].bv_len = snprintf(keys[0].bv_val,
 564                                         LDAP_PVT_INTTYPE_CHARS(long),
 565                                         "%ld", slap_get_time() + pi->smb_must_change);
 566                         BER_BVZERO( &keys[1] );
 567
 568                         ml->sml_desc = ad_sambaPwdMustChange;
 569                         ml->sml_op = LDAP_MOD_REPLACE;
 570 #ifdef SLAP_MOD_INTERNAL
 571                         ml->sml_flags = SLAP_MOD_INTERNAL;
 572 #endif
 573                         ml->sml_numvals = 1;
 574                         ml->sml_values = keys;
 575                         ml->sml_nvalues = NULL;
 576                 }
 577
 578                 if (pi->smb_can_change)
 579                 {
 580                         ml = ch_malloc(sizeof(Modifications));
 581                         ml->sml_next = qpw->rs_mods;
 582                         qpw->rs_mods = ml;
 583
 584                         keys = ch_malloc( 2 * sizeof(struct berval) );
 585                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 586                         keys[0].bv_len = snprintf(keys[0].bv_val,
 587                                         LDAP_PVT_INTTYPE_CHARS(long),
 588                                         "%ld", slap_get_time() + pi->smb_can_change);
 589                         BER_BVZERO( &keys[1] );
 590
 591                         ml->sml_desc = ad_sambaPwdCanChange;
 592                         ml->sml_op = LDAP_MOD_REPLACE;
 593 #ifdef SLAP_MOD_INTERNAL
 594                         ml->sml_flags = SLAP_MOD_INTERNAL;
 595 #endif
 596                         ml->sml_numvals = 1;
 597                         ml->sml_values = keys;
 598                         ml->sml_nvalues = NULL;
 599                 }
 600         }
 601 #endif /* DO_SAMBA */
 602         be_entry_release_r( op, e );
 603         qpw->rs_new.bv_val[qpw->rs_new.bv_len] = term;
 604
 605         return SLAP_CB_CONTINUE;
 606 }
 607
 608 static slap_overinst smbk5pwd;
 609
 610 /* back-config stuff */
 611 enum {
 612         PC_SMB_MUST_CHANGE = 1,
 613         PC_SMB_CAN_CHANGE,
 614         PC_SMB_ENABLE
 615 };
 616
 617 static ConfigDriver smbk5pwd_cf_func;
 618
 619 /*
 620  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 621  */
 622
 623 static ConfigTable smbk5pwd_cfats[] = {
 624         { "smbk5pwd-enable", "arg",
 625                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 626                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 627                 "DESC 'Modules to be enabled' "
 628                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 629         { "smbk5pwd-must-change", "time",
 630                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 631                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 632                 "DESC 'Credentials validity interval' "
 633                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 634         { "smbk5pwd-can-change", "time",
 635                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 636                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 637                 "DESC 'Credentials minimum validity interval' "
 638                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 639
 640         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 641 };
 642
 643 static ConfigOCs smbk5pwd_cfocs[] = {
 644         { "( OLcfgCtOc:1.1 "
 645                 "NAME 'olcSmbK5PwdConfig' "
 646                 "DESC 'smbk5pwd overlay configuration' "
 647                 "SUP olcOverlayConfig "
 648                 "MAY ( "
 649                         "olcSmbK5PwdEnable "
 650                         "$ olcSmbK5PwdMustChange "
 651                         "$ olcSmbK5PwdCanChange "
 652                 ") )", Cft_Overlay, smbk5pwd_cfats },
 653
 654         { NULL, 0, NULL }
 655 };
 656
 657 /*
 658  * add here other functionalities; handle their initialization
 659  * as appropriate in smbk5pwd_modules_init().
 660  */
 661 static slap_verbmasks smbk5pwd_modules[] = {
 662         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 663         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 664         { BER_BVNULL,                   -1 }
 665 };
 666
 667 static int
 668 smbk5pwd_cf_func( ConfigArgs *c )
 669 {
 670         slap_overinst   *on = (slap_overinst *)c->bi;
 671
 672         int             rc = 0;
 673         smbk5pwd_t      *pi = on->on_bi.bi_private;
 674
 675         if ( c->op == SLAP_CONFIG_EMIT ) {
 676                 switch( c->type ) {
 677                 case PC_SMB_MUST_CHANGE:
 678 #ifdef DO_SAMBA
 679                         c->value_int = pi->smb_must_change;
 680 #else /* ! DO_SAMBA */
 681                         c->value_int = 0;
 682 #endif /* ! DO_SAMBA */
 683                         break;
 684
 685                 case PC_SMB_CAN_CHANGE:
 686 #ifdef DO_SAMBA
 687                         c->value_int = pi->smb_can_change;
 688 #else /* ! DO_SAMBA */
 689                         c->value_int = 0;
 690 #endif /* ! DO_SAMBA */
 691                         break;
 692
 693                 case PC_SMB_ENABLE:
 694                         c->rvalue_vals = NULL;
 695                         if ( pi->mode ) {
 696                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 697                                 if ( c->rvalue_vals == NULL ) {
 698                                         rc = 1;
 699                                 }
 700                         }
 701                         break;
 702
 703                 default:
 704                         assert( 0 );
 705                         rc = 1;
 706                 }
 707                 return rc;
 708
 709         } else if ( c->op == LDAP_MOD_DELETE ) {
 710                 switch( c->type ) {
 711                 case PC_SMB_MUST_CHANGE:
 712                         break;
 713
 714                 case PC_SMB_CAN_CHANGE:
 715                         break;
 716
 717                 case PC_SMB_ENABLE:
 718                         if ( !c->line ) {
 719                                 pi->mode = 0;
 720
 721                         } else {
 722                                 slap_mask_t     m;
 723
 724                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 725                                 pi->mode &= ~m;
 726                         }
 727                         break;
 728
 729                 default:
 730                         assert( 0 );
 731                         rc = 1;
 732                 }
 733                 return rc;
 734         }
 735
 736         switch( c->type ) {
 737         case PC_SMB_MUST_CHANGE:
 738 #ifdef DO_SAMBA
 739                 if ( c->value_int < 0 ) {
 740                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 741                                 "<%s> invalid negative value \"%d\".",
 742                                 c->log, c->argv[ 0 ], 0 );
 743                         return 1;
 744                 }
 745                 pi->smb_must_change = c->value_int;
 746 #else /* ! DO_SAMBA */
 747                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 748                         "<%s> only meaningful "
 749                         "when compiled with -DDO_SAMBA.\n",
 750                         c->log, c->argv[ 0 ], 0 );
 751                 return 1;
 752 #endif /* ! DO_SAMBA */
 753                 break;
 754
 755         case PC_SMB_CAN_CHANGE:
 756 #ifdef DO_SAMBA
 757                 if ( c->value_int < 0 ) {
 758                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 759                                 "<%s> invalid negative value \"%d\".",
 760                                 c->log, c->argv[ 0 ], 0 );
 761                         return 1;
 762                 }
 763                 pi->smb_can_change = c->value_int;
 764 #else /* ! DO_SAMBA */
 765                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 766                         "<%s> only meaningful "
 767                         "when compiled with -DDO_SAMBA.\n",
 768                         c->log, c->argv[ 0 ], 0 );
 769                 return 1;
 770 #endif /* ! DO_SAMBA */
 771                 break;
 772
 773         case PC_SMB_ENABLE: {
 774                 slap_mask_t     mode = pi->mode, m;
 775
 776                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 777                 if ( rc > 0 ) {
 778                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 779                                 "<%s> unknown module \"%s\".\n",
 780                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 781                         return 1;
 782                 }
 783
 784                 /* we can hijack the smbk5pwd_t structure because
 785                  * from within the configuration, this is the only
 786                  * active thread. */
 787                 pi->mode |= m;
 788
 789 #ifndef DO_KRB5
 790                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 791                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 792                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 793                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 794                         pi->mode = mode;
 795                         return 1;
 796                 }
 797 #endif /* ! DO_KRB5 */
 798
 799 #ifndef DO_SAMBA
 800                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 801                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 802                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 803                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 804                         pi->mode = mode;
 805                         return 1;
 806                 }
 807 #endif /* ! DO_SAMBA */
 808
 809                 {
 810                         BackendDB       db = *c->be;
 811
 812                         /* Re-initialize the module, because
 813                          * the configuration might have changed */
 814                         db.bd_info = (BackendInfo *)on;
 815                         rc = smbk5pwd_modules_init( pi );
 816                         if ( rc ) {
 817                                 pi->mode = mode;
 818                                 return 1;
 819                         }
 820                 }
 821
 822                 } break;
 823
 824         default:
 825                 assert( 0 );
 826                 return 1;
 827         }
 828         return rc;
 829 }
 830
 831 static int
 832 smbk5pwd_modules_init( smbk5pwd_t *pi )
 833 {
 834         static struct {
 835                 const char              *name;
 836                 AttributeDescription    **adp;
 837         }
 838 #ifdef DO_KRB5
 839         krb5_ad[] = {
 840                 { "krb5Key",                    &ad_krb5Key },
 841                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 842                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 843                 { NULL }
 844         },
 845 #endif /* DO_KRB5 */
 846 #ifdef DO_SAMBA
 847         samba_ad[] = {
 848                 { "sambaLMPassword",            &ad_sambaLMPassword },
 849                 { "sambaNTPassword",            &ad_sambaNTPassword },
 850                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 851                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 852                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 853                 { NULL }
 854         },
 855 #endif /* DO_SAMBA */
 856         dummy_ad;
 857
 858         /* this is to silence the unused var warning */
 859         dummy_ad.name = NULL;
 860
 861 #ifdef DO_KRB5
 862         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 863                 krb5_error_code ret;
 864                 extern HDB      *_kadm5_s_get_db(void *);
 865
 866                 int             i, rc;
 867
 868                 /* Make sure all of our necessary schema items are loaded */
 869                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 870                 if ( !oc_krb5KDCEntry ) {
 871                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 872                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 873                                 0, 0, 0 );
 874                         return -1;
 875                 }
 876
 877                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 878                         const char      *text;
 879
 880                         *(krb5_ad[ i ].adp) = NULL;
 881
 882                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 883                         if ( rc != LDAP_SUCCESS ) {
 884                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 885                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 886                                         krb5_ad[ i ].name, text, rc );
 887                                 oc_krb5KDCEntry = NULL;
 888                                 return rc;
 889                         }
 890                 }
 891
 892                 /* Initialize Kerberos context */
 893                 ret = krb5_init_context(&context);
 894                 if (ret) {
 895                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 896                                 "unable to initialize krb5 context (%d).\n",
 897                                 ret, 0, 0 );
 898                         oc_krb5KDCEntry = NULL;
 899                         return -1;
 900                 }
 901
 902                 ret = kadm5_s_init_with_password_ctx( context,
 903                         KADM5_ADMIN_SERVICE,
 904                         NULL,
 905                         KADM5_ADMIN_SERVICE,
 906                         &conf, 0, 0, &kadm_context );
 907                 if (ret) {
 908                         char *err_str, *err_msg = "<unknown error>";
 909                         err_str = krb5_get_error_string( context );
 910                         if (!err_str)
 911                                 err_msg = krb5_get_err_text( context, ret );
 912                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 913                                 "unable to initialize krb5 admin context: %s (%d).\n",
 914                                 err_str ? err_str : err_msg, ret, 0 );
 915                         if (err_str)
 916                                 krb5_free_error_string( context, err_str );
 917                         krb5_free_context( context );
 918                         oc_krb5KDCEntry = NULL;
 919                         return -1;
 920                 }
 921
 922                 db = _kadm5_s_get_db( kadm_context );
 923         }
 924 #endif /* DO_KRB5 */
 925
 926 #ifdef DO_SAMBA
 927         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 928                 int             i, rc;
 929
 930                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 931                 if ( !oc_sambaSamAccount ) {
 932                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 933                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 934                                 0, 0, 0 );
 935                         return -1;
 936                 }
 937
 938                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 939                         const char      *text;
 940
 941                         *(samba_ad[ i ].adp) = NULL;
 942
 943                         rc = slap_str2ad( samba_ad[ i ].name, samba_ad[ i ].adp, &text );
 944                         if ( rc != LDAP_SUCCESS ) {
 945                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 946                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 947                                         samba_ad[ i ].name, text, rc );
 948                                 oc_sambaSamAccount = NULL;
 949                                 return rc;
 950                         }
 951                 }
 952         }
 953 #endif /* DO_SAMBA */
 954
 955         return 0;
 956 }
 957
 958 static int
 959 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
 960 {
 961         slap_overinst   *on = (slap_overinst *)be->bd_info;
 962         smbk5pwd_t      *pi;
 963
 964         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 965         if ( pi == NULL ) {
 966                 return 1;
 967         }
 968         on->on_bi.bi_private = (void *)pi;
 969
 970         return 0;
 971 }
 972
 973 static int
 974 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
 975 {
 976         slap_overinst   *on = (slap_overinst *)be->bd_info;
 977         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 978
 979         int     rc;
 980
 981         if ( pi->mode == 0 ) {
 982                 pi->mode = SMBK5PWD_F_ALL;
 983         }
 984
 985         rc = smbk5pwd_modules_init( pi );
 986         if ( rc ) {
 987                 return rc;
 988         }
 989
 990         return 0;
 991 }
 992
 993 static int
 994 smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
 995 {
 996         slap_overinst   *on = (slap_overinst *)be->bd_info;
 997         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 998
 999         if ( pi ) {
1000                 ch_free( pi );
1001         }
1002
1003         return 0;
1004 }
1005
1006 int
1007 smbk5pwd_initialize(void)
1008 {
1009         int             rc;
1010
1011         smbk5pwd.on_bi.bi_type = "smbk5pwd";
1012
1013         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1014         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1015         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1016
1017         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1018
1019 #ifdef DO_KRB5
1020         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1021
1022         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1023 #endif
1024
1025         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1026
1027         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1028         if ( rc ) {
1029                 return rc;
1030         }
1031
1032         return overlay_register( &smbk5pwd );
1033 }
1034
1035 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1036 int init_module(int argc, char *argv[]) {
1037         return smbk5pwd_initialize();
1038 }
1039 #endif
1040
1041 #endif /* defined(SLAPD_OVER_SMBK5PWD) */