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;
 272         Operation *op;
 273         int rc;
 274         Entry *e;
 275         Attribute *a;
 276     krb5_error_code ret;
 277     krb5_keyblock key;
 278     krb5_salt salt;
 279         hdb_entry ent;
 280
 281         /* Find our thread context, find our Operation */
 282         ctx = ldap_pvt_thread_pool_context();
 283
 284         if ( ldap_pvt_thread_pool_getkey( ctx, smbk5pwd_op_cleanup, (void **)&op, NULL ) ||
 285                 !op )
 286                 return LUTIL_PASSWD_ERR;
 287
 288         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 289         if ( rc != LDAP_SUCCESS ) return LUTIL_PASSWD_ERR;
 290
 291         rc = LUTIL_PASSWD_ERR;
 292         do {
 293                 size_t l;
 294                 Key ekey = {0};
 295
 296                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 297                 if (!a ) break;
 298
 299                 memset( &ent, 0, sizeof(ent) );
 300                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 301                 if ( ret ) break;
 302                 krb5_get_pw_salt( context, ent.principal, &salt );
 303                 krb5_free_principal( context, ent.principal );
 304
 305                 a = attr_find( e->e_attrs, ad_krb5Key );
 306                 if ( !a ) break;
 307
 308                 ent.keys.len = 1;
 309                 ent.keys.val = &ekey;
 310                 decode_Key((unsigned char *) a->a_vals[0].bv_val,
 311                         (size_t) a->a_vals[0].bv_len, &ent.keys.val[0], &l);
 312                 if ( db->HDB_MASTER_KEY_SET )
 313                         hdb_unseal_keys( context, db, &ent );
 314
 315                 krb5_string_to_key_salt( context, ekey.key.keytype, cred->bv_val,
 316                         salt, &key );
 317
 318                 krb5_free_salt( context, salt );
 319
 320                 if ( memcmp( ekey.key.keyvalue.data, key.keyvalue.data,
 321                         key.keyvalue.length ) == 0 ) rc = LUTIL_PASSWD_OK;
 322
 323                 krb5_free_keyblock_contents( context, &key );
 324                 krb5_free_keyblock_contents( context, &ekey.key );
 325
 326         } while(0);
 327         be_entry_release_r( op, e );
 328         return rc;
 329 }
 330
 331 static int k5key_hash(
 332         const struct berval *scheme,
 333         const struct berval *passwd,
 334         struct berval *hash,
 335         const char **text )
 336 {
 337         ber_dupbv( hash, (struct berval *)&k5key_scheme );
 338         return LUTIL_PASSWD_OK;
 339 }
 340 #endif /* DO_KRB5 */
 341
 342 static int smbk5pwd_exop_passwd(
 343         Operation *op,
 344         SlapReply *rs )
 345 {
 346         int rc;
 347         req_pwdexop_s *qpw = &op->oq_pwdexop;
 348         Entry *e;
 349         Modifications *ml;
 350         slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
 351         smbk5pwd_t *pi = on->on_bi.bi_private;
 352
 353         /* Not the operation we expected, pass it on... */
 354         if ( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) ) {
 355                 return SLAP_CB_CONTINUE;
 356         }
 357
 358         op->o_bd->bd_info = (BackendInfo *)on->on_info;
 359         rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
 360         if ( rc != LDAP_SUCCESS ) return rc;
 361
 362 #ifdef DO_KRB5
 363         /* Kerberos stuff */
 364         do {
 365                 krb5_error_code ret;
 366                 hdb_entry ent;
 367                 struct berval *keys;
 368                 int kvno, i;
 369                 Attribute *a;
 370
 371                 if ( !SMBK5PWD_DO_KRB5( pi ) ) break;
 372
 373                 if ( !is_entry_objectclass(e, oc_krb5KDCEntry, 0 ) ) break;
 374
 375                 a = attr_find( e->e_attrs, ad_krb5PrincipalName );
 376                 if ( !a ) break;
 377
 378                 memset( &ent, 0, sizeof(ent) );
 379                 ret = krb5_parse_name(context, a->a_vals[0].bv_val, &ent.principal);
 380                 if ( ret ) break;
 381
 382                 a = attr_find( e->e_attrs, ad_krb5KeyVersionNumber );
 383                 kvno = 0;
 384                 if ( a ) {
 385                         if ( lutil_atoi( &kvno, a->a_vals[0].bv_val ) != 0 ) {
 386                                 Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 387                                         "dn=\"%s\" unable to parse krb5KeyVersionNumber=\"%s\"\n",
 388                                         op->o_log_prefix, e->e_name.bv_val, a->a_vals[0].bv_val );
 389                         }
 390
 391                 } else {
 392                         /* shouldn't happen, this is a required attr */
 393                         Debug( LDAP_DEBUG_ANY, "%s smbk5pwd EXOP: "
 394                                 "dn=\"%s\" missing krb5KeyVersionNumber\n",
 395                                 op->o_log_prefix, e->e_name.bv_val, 0 );
 396                 }
 397
 398                 ret = _kadm5_set_keys(kadm_context, &ent, qpw->rs_new.bv_val);
 399                 hdb_seal_keys(context, db, &ent);
 400                 krb5_free_principal( context, ent.principal );
 401
 402                 keys = ch_malloc( (ent.keys.len + 1) * sizeof(struct berval));
 403
 404                 for (i = 0; i < ent.keys.len; i++) {
 405                         unsigned char *buf;
 406                         size_t len;
 407
 408                         ASN1_MALLOC_ENCODE(Key, buf, len, &ent.keys.val[i], &len, ret);
 409                         if (ret != 0)
 410                                 break;
 411
 412                         keys[i].bv_val = (char *)buf;
 413                         keys[i].bv_len = len;
 414                 }
 415                 BER_BVZERO( &keys[i] );
 416
 417                 _kadm5_free_keys(kadm_context, ent.keys.len, ent.keys.val);
 418
 419                 if ( i != ent.keys.len ) {
 420                         ber_bvarray_free( keys );
 421                         break;
 422                 }
 423
 424                 ml = ch_malloc(sizeof(Modifications));
 425                 if (!qpw->rs_modtail) qpw->rs_modtail = &ml->sml_next;
 426                 ml->sml_next = qpw->rs_mods;
 427                 qpw->rs_mods = ml;
 428
 429                 ml->sml_desc = ad_krb5Key;
 430                 ml->sml_op = LDAP_MOD_REPLACE;
 431 #ifdef SLAP_MOD_INTERNAL
 432                 ml->sml_flags = SLAP_MOD_INTERNAL;
 433 #endif
 434                 ml->sml_numvals = i;
 435                 ml->sml_values = keys;
 436                 ml->sml_nvalues = NULL;
 437
 438                 ml = ch_malloc(sizeof(Modifications));
 439                 ml->sml_next = qpw->rs_mods;
 440                 qpw->rs_mods = ml;
 441
 442                 ml->sml_desc = ad_krb5KeyVersionNumber;
 443                 ml->sml_op = LDAP_MOD_REPLACE;
 444 #ifdef SLAP_MOD_INTERNAL
 445                 ml->sml_flags = SLAP_MOD_INTERNAL;
 446 #endif
 447                 ml->sml_numvals = 1;
 448                 ml->sml_values = ch_malloc( 2 * sizeof(struct berval));
 449                 ml->sml_values[0].bv_val = ch_malloc( 64 );
 450                 ml->sml_values[0].bv_len = sprintf(ml->sml_values[0].bv_val,
 451                         "%d", kvno+1 );
 452                 BER_BVZERO( &ml->sml_values[1] );
 453                 ml->sml_nvalues = NULL;
 454         } while ( 0 );
 455 #endif /* DO_KRB5 */
 456
 457 #ifdef DO_SAMBA
 458         /* Samba stuff */
 459         if ( SMBK5PWD_DO_SAMBA( pi ) && is_entry_objectclass(e, oc_sambaSamAccount, 0 ) ) {
 460                 struct berval *keys;
 461                 ber_len_t j,l;
 462                 wchar_t *wcs, wc;
 463                 char *c, *d;
 464                 struct berval pwd;
 465
 466                 /* Expand incoming UTF8 string to UCS4 */
 467                 l = ldap_utf8_chars(qpw->rs_new.bv_val);
 468                 wcs = ch_malloc((l+1) * sizeof(wchar_t));
 469
 470                 ldap_x_utf8s_to_wcs( wcs, qpw->rs_new.bv_val, l );
 471
 472                 /* Truncate UCS4 to UCS2 */
 473                 c = (char *)wcs;
 474                 for (j=0; j<l; j++) {
 475                         wc = wcs[j];
 476                         *c++ = wc & 0xff;
 477                         *c++ = (wc >> 8) & 0xff;
 478                 }
 479                 *c++ = 0;
 480                 pwd.bv_val = (char *)wcs;
 481                 pwd.bv_len = l * 2;
 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                 keys = ch_malloc( 2 * sizeof(struct berval) );
 489                 BER_BVZERO( &keys[1] );
 490                 nthash( &pwd, keys );
 491
 492                 ml->sml_desc = ad_sambaNTPassword;
 493                 ml->sml_op = LDAP_MOD_REPLACE;
 494 #ifdef SLAP_MOD_INTERNAL
 495                 ml->sml_flags = SLAP_MOD_INTERNAL;
 496 #endif
 497                 ml->sml_numvals = 1;
 498                 ml->sml_values = keys;
 499                 ml->sml_nvalues = NULL;
 500
 501                 /* Truncate UCS2 to 8-bit ASCII */
 502                 c = pwd.bv_val+1;
 503                 d = pwd.bv_val+2;
 504                 for (j=1; j<l; j++) {
 505                         *c++ = *d++;
 506                         d++;
 507                 }
 508                 pwd.bv_len /= 2;
 509                 pwd.bv_val[pwd.bv_len] = '\0';
 510
 511                 ml = ch_malloc(sizeof(Modifications));
 512                 ml->sml_next = qpw->rs_mods;
 513                 qpw->rs_mods = ml;
 514
 515                 keys = ch_malloc( 2 * sizeof(struct berval) );
 516                 BER_BVZERO( &keys[1] );
 517                 lmhash( &pwd, keys );
 518
 519                 ml->sml_desc = ad_sambaLMPassword;
 520                 ml->sml_op = LDAP_MOD_REPLACE;
 521 #ifdef SLAP_MOD_INTERNAL
 522                 ml->sml_flags = SLAP_MOD_INTERNAL;
 523 #endif
 524                 ml->sml_numvals = 1;
 525                 ml->sml_values = keys;
 526                 ml->sml_nvalues = NULL;
 527
 528                 ch_free(wcs);
 529
 530                 ml = ch_malloc(sizeof(Modifications));
 531                 ml->sml_next = qpw->rs_mods;
 532                 qpw->rs_mods = ml;
 533
 534                 keys = ch_malloc( 2 * sizeof(struct berval) );
 535                 keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 536                 keys[0].bv_len = snprintf(keys[0].bv_val,
 537                         LDAP_PVT_INTTYPE_CHARS(long),
 538                         "%ld", slap_get_time());
 539                 BER_BVZERO( &keys[1] );
 540
 541                 ml->sml_desc = ad_sambaPwdLastSet;
 542                 ml->sml_op = LDAP_MOD_REPLACE;
 543 #ifdef SLAP_MOD_INTERNAL
 544                 ml->sml_flags = SLAP_MOD_INTERNAL;
 545 #endif
 546                 ml->sml_numvals = 1;
 547                 ml->sml_values = keys;
 548                 ml->sml_nvalues = NULL;
 549
 550                 if (pi->smb_must_change)
 551                 {
 552                         ml = ch_malloc(sizeof(Modifications));
 553                         ml->sml_next = qpw->rs_mods;
 554                         qpw->rs_mods = ml;
 555
 556                         keys = ch_malloc( 2 * sizeof(struct berval) );
 557                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 558                         keys[0].bv_len = snprintf(keys[0].bv_val,
 559                                         LDAP_PVT_INTTYPE_CHARS(long),
 560                                         "%ld", slap_get_time() + pi->smb_must_change);
 561                         BER_BVZERO( &keys[1] );
 562
 563                         ml->sml_desc = ad_sambaPwdMustChange;
 564                         ml->sml_op = LDAP_MOD_REPLACE;
 565 #ifdef SLAP_MOD_INTERNAL
 566                         ml->sml_flags = SLAP_MOD_INTERNAL;
 567 #endif
 568                         ml->sml_numvals = 1;
 569                         ml->sml_values = keys;
 570                         ml->sml_nvalues = NULL;
 571                 }
 572
 573                 if (pi->smb_can_change)
 574                 {
 575                         ml = ch_malloc(sizeof(Modifications));
 576                         ml->sml_next = qpw->rs_mods;
 577                         qpw->rs_mods = ml;
 578
 579                         keys = ch_malloc( 2 * sizeof(struct berval) );
 580                         keys[0].bv_val = ch_malloc( LDAP_PVT_INTTYPE_CHARS(long) );
 581                         keys[0].bv_len = snprintf(keys[0].bv_val,
 582                                         LDAP_PVT_INTTYPE_CHARS(long),
 583                                         "%ld", slap_get_time() + pi->smb_can_change);
 584                         BER_BVZERO( &keys[1] );
 585
 586                         ml->sml_desc = ad_sambaPwdCanChange;
 587                         ml->sml_op = LDAP_MOD_REPLACE;
 588 #ifdef SLAP_MOD_INTERNAL
 589                         ml->sml_flags = SLAP_MOD_INTERNAL;
 590 #endif
 591                                                 ml->sml_numvals = 1;
 592                         ml->sml_values = keys;
 593                         ml->sml_nvalues = NULL;
 594                 }
 595         }
 596 #endif /* DO_SAMBA */
 597         be_entry_release_r( op, e );
 598
 599         return SLAP_CB_CONTINUE;
 600 }
 601
 602 static slap_overinst smbk5pwd;
 603
 604 /* back-config stuff */
 605 enum {
 606         PC_SMB_MUST_CHANGE = 1,
 607         PC_SMB_CAN_CHANGE,
 608         PC_SMB_ENABLE
 609 };
 610
 611 static ConfigDriver smbk5pwd_cf_func;
 612
 613 /*
 614  * NOTE: uses OID arcs OLcfgCtAt:1 and OLcfgCtOc:1
 615  */
 616
 617 static ConfigTable smbk5pwd_cfats[] = {
 618         { "smbk5pwd-enable", "arg",
 619                 2, 0, 0, ARG_MAGIC|PC_SMB_ENABLE, smbk5pwd_cf_func,
 620                 "( OLcfgCtAt:1.1 NAME 'olcSmbK5PwdEnable' "
 621                 "DESC 'Modules to be enabled' "
 622                 "SYNTAX OMsDirectoryString )", NULL, NULL },
 623         { "smbk5pwd-must-change", "time",
 624                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_MUST_CHANGE, smbk5pwd_cf_func,
 625                 "( OLcfgCtAt:1.2 NAME 'olcSmbK5PwdMustChange' "
 626                 "DESC 'Credentials validity interval' "
 627                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 628         { "smbk5pwd-can-change", "time",
 629                 2, 2, 0, ARG_MAGIC|ARG_INT|PC_SMB_CAN_CHANGE, smbk5pwd_cf_func,
 630                 "( OLcfgCtAt:1.3 NAME 'olcSmbK5PwdCanChange' "
 631                 "DESC 'Credentials minimum validity interval' "
 632                 "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL },
 633
 634         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
 635 };
 636
 637 static ConfigOCs smbk5pwd_cfocs[] = {
 638         { "( OLcfgCtOc:1.1 "
 639                 "NAME 'olcSmbK5PwdConfig' "
 640                 "DESC 'smbk5pwd overlay configuration' "
 641                 "SUP olcOverlayConfig "
 642                 "MAY ( "
 643                         "olcSmbK5PwdEnable "
 644                         "$ olcSmbK5PwdMustChange "
 645                         "$ olcSmbK5PwdCanChange "
 646                 ") )", Cft_Overlay, smbk5pwd_cfats },
 647
 648         { NULL, 0, NULL }
 649 };
 650
 651 /*
 652  * add here other functionalities; handle their initialization
 653  * as appropriate in smbk5pwd_modules_init().
 654  */
 655 static slap_verbmasks smbk5pwd_modules[] = {
 656         { BER_BVC( "krb5" ),            SMBK5PWD_F_KRB5 },
 657         { BER_BVC( "samba" ),           SMBK5PWD_F_SAMBA },
 658         { BER_BVNULL,                   -1 }
 659 };
 660
 661 static int
 662 smbk5pwd_cf_func( ConfigArgs *c )
 663 {
 664         slap_overinst   *on = (slap_overinst *)c->bi;
 665
 666         int             rc = 0;
 667         smbk5pwd_t      *pi = on->on_bi.bi_private;
 668
 669         if ( c->op == SLAP_CONFIG_EMIT ) {
 670                 switch( c->type ) {
 671                 case PC_SMB_MUST_CHANGE:
 672 #ifdef DO_SAMBA
 673                         c->value_int = pi->smb_must_change;
 674 #else /* ! DO_SAMBA */
 675                         c->value_int = 0;
 676 #endif /* ! DO_SAMBA */
 677                         break;
 678
 679                 case PC_SMB_CAN_CHANGE:
 680 #ifdef DO_SAMBA
 681                         c->value_int = pi->smb_can_change;
 682 #else /* ! DO_SAMBA */
 683                         c->value_int = 0;
 684 #endif /* ! DO_SAMBA */
 685                         break;
 686
 687                 case PC_SMB_ENABLE:
 688                         c->rvalue_vals = NULL;
 689                         if ( pi->mode ) {
 690                                 mask_to_verbs( smbk5pwd_modules, pi->mode, &c->rvalue_vals );
 691                                 if ( c->rvalue_vals == NULL ) {
 692                                         rc = 1;
 693                                 }
 694                         }
 695                         break;
 696
 697                 default:
 698                         assert( 0 );
 699                         rc = 1;
 700                 }
 701                 return rc;
 702
 703         } else if ( c->op == LDAP_MOD_DELETE ) {
 704                 switch( c->type ) {
 705                 case PC_SMB_MUST_CHANGE:
 706                         break;
 707
 708                 case PC_SMB_CAN_CHANGE:
 709                         break;
 710
 711                 case PC_SMB_ENABLE:
 712                         if ( !c->line ) {
 713                                 pi->mode = 0;
 714
 715                         } else {
 716                                 slap_mask_t     m;
 717
 718                                 m = verb_to_mask( c->line, smbk5pwd_modules );
 719                                 pi->mode &= ~m;
 720                         }
 721                         break;
 722
 723                 default:
 724                         assert( 0 );
 725                         rc = 1;
 726                 }
 727                 return rc;
 728         }
 729
 730         switch( c->type ) {
 731         case PC_SMB_MUST_CHANGE:
 732 #ifdef DO_SAMBA
 733                 if ( c->value_int < 0 ) {
 734                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 735                                 "<%s> invalid negative value \"%d\".",
 736                                 c->log, c->argv[ 0 ], 0 );
 737                         return 1;
 738                 }
 739                 pi->smb_must_change = c->value_int;
 740 #else /* ! DO_SAMBA */
 741                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 742                         "<%s> only meaningful "
 743                         "when compiled with -DDO_SAMBA.\n",
 744                         c->log, c->argv[ 0 ], 0 );
 745                 return 1;
 746 #endif /* ! DO_SAMBA */
 747                 break;
 748
 749         case PC_SMB_CAN_CHANGE:
 750 #ifdef DO_SAMBA
 751                 if ( c->value_int < 0 ) {
 752                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 753                                 "<%s> invalid negative value \"%d\".",
 754                                 c->log, c->argv[ 0 ], 0 );
 755                         return 1;
 756                 }
 757                 pi->smb_can_change = c->value_int;
 758 #else /* ! DO_SAMBA */
 759                 Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 760                         "<%s> only meaningful "
 761                         "when compiled with -DDO_SAMBA.\n",
 762                         c->log, c->argv[ 0 ], 0 );
 763                 return 1;
 764 #endif /* ! DO_SAMBA */
 765                 break;
 766
 767         case PC_SMB_ENABLE: {
 768                 slap_mask_t     mode = pi->mode, m;
 769
 770                 rc = verbs_to_mask( c->argc, c->argv, smbk5pwd_modules, &m );
 771                 if ( rc > 0 ) {
 772                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 773                                 "<%s> unknown module \"%s\".\n",
 774                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 775                         return 1;
 776                 }
 777
 778                 /* we can hijack the smbk5pwd_t structure because
 779                  * from within the configuration, this is the only
 780                  * active thread. */
 781                 pi->mode |= m;
 782
 783 #ifndef DO_KRB5
 784                 if ( SMBK5PWD_DO_KRB5( pi ) ) {
 785                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 786                                 "<%s> module \"%s\" only allowed when compiled with -DDO_KRB5.\n",
 787                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 788                         pi->mode = mode;
 789                         return 1;
 790                 }
 791 #endif /* ! DO_KRB5 */
 792
 793 #ifndef DO_SAMBA
 794                 if ( SMBK5PWD_DO_SAMBA( pi ) ) {
 795                         Debug( LDAP_DEBUG_ANY, "%s: smbk5pwd: "
 796                                 "<%s> module \"%s\" only allowed when compiled with -DDO_SAMBA.\n",
 797                                 c->log, c->argv[ 0 ], c->argv[ rc ] );
 798                         pi->mode = mode;
 799                         return 1;
 800                 }
 801 #endif /* ! DO_SAMBA */
 802
 803                 {
 804                         BackendDB       db = *c->be;
 805
 806                         /* Re-initialize the module, because
 807                          * the configuration might have changed */
 808                         db.bd_info = (BackendInfo *)on;
 809                         rc = smbk5pwd_modules_init( pi );
 810                         if ( rc ) {
 811                                 pi->mode = mode;
 812                                 return 1;
 813                         }
 814                 }
 815
 816                 } break;
 817
 818         default:
 819                 assert( 0 );
 820                 return 1;
 821         }
 822         return rc;
 823 }
 824
 825 static int
 826 smbk5pwd_modules_init( smbk5pwd_t *pi )
 827 {
 828         static struct {
 829                 const char              *name;
 830                 AttributeDescription    **adp;
 831         }
 832 #ifdef DO_KRB5
 833         krb5_ad[] = {
 834                 { "krb5Key",                    &ad_krb5Key },
 835                 { "krb5KeyVersionNumber",       &ad_krb5KeyVersionNumber },
 836                 { "krb5PrincipalName",          &ad_krb5PrincipalName },
 837                 { NULL }
 838         },
 839 #endif /* DO_KRB5 */
 840 #ifdef DO_SAMBA
 841         samba_ad[] = {
 842                 { "sambaLMPassword",            &ad_sambaLMPassword },
 843                 { "sambaNTPassword",            &ad_sambaNTPassword },
 844                 { "sambaPwdLastSet",            &ad_sambaPwdLastSet },
 845                 { "sambaPwdMustChange",         &ad_sambaPwdMustChange },
 846                 { "sambaPwdCanChange",          &ad_sambaPwdCanChange },
 847                 { NULL }
 848         },
 849 #endif /* DO_SAMBA */
 850         dummy_ad;
 851
 852         /* this is to silence the unused var warning */
 853         dummy_ad.name = NULL;
 854
 855 #ifdef DO_KRB5
 856         if ( SMBK5PWD_DO_KRB5( pi ) && oc_krb5KDCEntry == NULL ) {
 857                 krb5_error_code ret;
 858                 extern HDB      *_kadm5_s_get_db(void *);
 859
 860                 int             i, rc;
 861
 862                 /* Make sure all of our necessary schema items are loaded */
 863                 oc_krb5KDCEntry = oc_find( "krb5KDCEntry" );
 864                 if ( !oc_krb5KDCEntry ) {
 865                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 866                                 "unable to find \"krb5KDCEntry\" objectClass.\n",
 867                                 0, 0, 0 );
 868                         return -1;
 869                 }
 870
 871                 for ( i = 0; krb5_ad[ i ].name != NULL; i++ ) {
 872                         const char      *text;
 873
 874                         *(krb5_ad[ i ].adp) = NULL;
 875
 876                         rc = slap_str2ad( krb5_ad[ i ].name, krb5_ad[ i ].adp, &text );
 877                         if ( rc != LDAP_SUCCESS ) {
 878                                 Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 879                                         "unable to find \"%s\" attributeType: %s (%d).\n",
 880                                         krb5_ad[ i ].name, text, rc );
 881                                 oc_krb5KDCEntry = NULL;
 882                                 return rc;
 883                         }
 884                 }
 885
 886                 /* Initialize Kerberos context */
 887                 ret = krb5_init_context(&context);
 888                 if (ret) {
 889                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 890                                 "unable to initialize krb5 context (%d).\n",
 891                                 ret, 0, 0 );
 892                         oc_krb5KDCEntry = NULL;
 893                         return -1;
 894                 }
 895
 896                 ret = kadm5_s_init_with_password_ctx( context,
 897                         KADM5_ADMIN_SERVICE,
 898                         NULL,
 899                         KADM5_ADMIN_SERVICE,
 900                         &conf, 0, 0, &kadm_context );
 901                 if (ret) {
 902                         char *err_str, *err_msg = "<unknown error>";
 903                         err_str = krb5_get_error_string( context );
 904                         if (!err_str)
 905                                 err_msg = krb5_get_err_text( context, ret );
 906                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 907                                 "unable to initialize krb5 admin context: %s (%d).\n",
 908                                 err_str ? err_str : err_msg, ret, 0 );
 909                         if (err_str)
 910                                 krb5_free_error_string( context, err_str );
 911                         krb5_free_context( context );
 912                         oc_krb5KDCEntry = NULL;
 913                         return -1;
 914                 }
 915
 916                 db = _kadm5_s_get_db( kadm_context );
 917         }
 918 #endif /* DO_KRB5 */
 919
 920 #ifdef DO_SAMBA
 921         if ( SMBK5PWD_DO_SAMBA( pi ) && oc_sambaSamAccount == NULL ) {
 922                 int             i, rc;
 923
 924                 oc_sambaSamAccount = oc_find( "sambaSamAccount" );
 925                 if ( !oc_sambaSamAccount ) {
 926                         Debug( LDAP_DEBUG_ANY, "smbk5pwd: "
 927                                 "unable to find \"sambaSamAccount\" objectClass.\n",
 928                                 0, 0, 0 );
 929                         return -1;
 930                 }
 931
 932                 for ( i = 0; samba_ad[ i ].name != NULL; i++ ) {
 933                         const char      *text;
 934
 935                         *(samba_ad[ i ].adp) = NULL;
 936
 937                         rc = slap_str2ad( samba_ad[ i ].name, samba_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                                         samba_ad[ i ].name, text, rc );
 942                                 oc_sambaSamAccount = NULL;
 943                                 return rc;
 944                         }
 945                 }
 946         }
 947 #endif /* DO_SAMBA */
 948
 949         return 0;
 950 }
 951
 952 static int
 953 smbk5pwd_db_init(BackendDB *be, ConfigReply *cr)
 954 {
 955         slap_overinst   *on = (slap_overinst *)be->bd_info;
 956         smbk5pwd_t      *pi;
 957
 958         pi = ch_calloc( 1, sizeof( smbk5pwd_t ) );
 959         if ( pi == NULL ) {
 960                 return 1;
 961         }
 962         on->on_bi.bi_private = (void *)pi;
 963
 964         return 0;
 965 }
 966
 967 static int
 968 smbk5pwd_db_open(BackendDB *be, ConfigReply *cr)
 969 {
 970         slap_overinst   *on = (slap_overinst *)be->bd_info;
 971         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 972
 973         int     rc;
 974
 975         if ( pi->mode == 0 ) {
 976                 pi->mode = SMBK5PWD_F_ALL;
 977         }
 978
 979         rc = smbk5pwd_modules_init( pi );
 980         if ( rc ) {
 981                 return rc;
 982         }
 983
 984         return 0;
 985 }
 986
 987 static int
 988 smbk5pwd_db_destroy(BackendDB *be, ConfigReply *cr)
 989 {
 990         slap_overinst   *on = (slap_overinst *)be->bd_info;
 991         smbk5pwd_t      *pi = (smbk5pwd_t *)on->on_bi.bi_private;
 992
 993         if ( pi ) {
 994                 ch_free( pi );
 995         }
 996
 997         return 0;
 998 }
 999
1000 int
1001 smbk5pwd_initialize(void)
1002 {
1003         int             rc;
1004
1005         smbk5pwd.on_bi.bi_type = "smbk5pwd";
1006
1007         smbk5pwd.on_bi.bi_db_init = smbk5pwd_db_init;
1008         smbk5pwd.on_bi.bi_db_open = smbk5pwd_db_open;
1009         smbk5pwd.on_bi.bi_db_destroy = smbk5pwd_db_destroy;
1010
1011         smbk5pwd.on_bi.bi_extended = smbk5pwd_exop_passwd;
1012
1013 #ifdef DO_KRB5
1014         smbk5pwd.on_bi.bi_op_bind = smbk5pwd_op_bind;
1015
1016         lutil_passwd_add( (struct berval *)&k5key_scheme, k5key_chk, k5key_hash );
1017 #endif
1018
1019         smbk5pwd.on_bi.bi_cf_ocs = smbk5pwd_cfocs;
1020
1021         rc = config_register_schema( smbk5pwd_cfats, smbk5pwd_cfocs );
1022         if ( rc ) {
1023                 return rc;
1024         }
1025
1026         return overlay_register( &smbk5pwd );
1027 }
1028
1029 #if SLAPD_OVER_SMBK5PWD == SLAPD_MOD_DYNAMIC
1030 int init_module(int argc, char *argv[]) {
1031         return smbk5pwd_initialize();
1032 }
1033 #endif
1034
1035 #endif /* defined(SLAPD_OVER_SMBK5PWD) */