git.sur5r.net Git - openldap/blob - servers/slapd/passwd.c

   1 /* passwd.c - password extended operation routines */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2003 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20
  21 #include <ac/krb.h>
  22 #include <ac/socket.h>
  23 #include <ac/string.h>
  24 #include <ac/unistd.h>
  25
  26 #include "slap.h"
  27
  28 #include <lber_pvt.h>
  29 #include <lutil.h>
  30
  31 int passwd_extop(
  32         Operation *op,
  33         SlapReply *rs )
  34 {
  35         struct berval id = {0, NULL}, old = {0, NULL}, new = {0, NULL},
  36                 dn, ndn, hash, vals[2];
  37         int freenew = 0;
  38         Modifications ml, **modtail;
  39         Operation op2;
  40         slap_callback cb = { slap_null_cb, NULL };
  41
  42         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
  43
  44         if( op->o_dn.bv_len == 0 ) {
  45                 rs->sr_text = "only authenticated users may change passwords";
  46                 return LDAP_STRONG_AUTH_REQUIRED;
  47         }
  48
  49         rs->sr_err = slap_passwd_parse( op->oq_extended.rs_reqdata, &id,
  50                 &old, &new, &rs->sr_text );
  51         if ( rs->sr_err != LDAP_SUCCESS ) {
  52                 return rs->sr_err;
  53         }
  54
  55         if ( id.bv_len ) {
  56                 dn = id;
  57                 /* ndn is in tmpmem, so we don't need to free it */
  58                 rs->sr_err = dnNormalize( 0, NULL, NULL, &dn, &ndn, op->o_tmpmemctx );
  59                 if ( rs->sr_err != LDAP_SUCCESS ) {
  60                         rs->sr_text = "Invalid DN";
  61                         return rs->sr_err;
  62                 }
  63                 op->o_bd = select_backend( &ndn, 0, 0 );
  64         } else {
  65                 dn = op->o_dn;
  66                 ndn = op->o_ndn;
  67                 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  68                 op->o_bd = op->o_conn->c_authz_backend;
  69                 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  70         }
  71
  72         if ( ndn.bv_len == 0 ) {
  73                 rs->sr_text = "no password is associated with the Root DSE";
  74                 return LDAP_UNWILLING_TO_PERFORM;
  75         }
  76
  77         if( op->o_bd && !op->o_bd->be_modify ) {
  78                 rs->sr_text = "operation not supported for current user";
  79                 return LDAP_UNWILLING_TO_PERFORM;
  80         }
  81
  82         if (backend_check_restrictions( op, rs,
  83                         (struct berval *)&slap_EXOP_MODIFY_PASSWD ) != LDAP_SUCCESS) {
  84                 return rs->sr_err;
  85         }
  86
  87         if( op->o_bd == NULL ) {
  88 #ifdef HAVE_CYRUS_SASL
  89                 return slap_sasl_setpass( op, rs );
  90 #else
  91                 rs->sr_text = "no authz backend";
  92                 return LDAP_OTHER;
  93 #endif
  94         }
  95
  96 #ifndef SLAPD_MULTIMASTER
  97         /* This does not apply to multi-master case */
  98         if( op->o_bd->be_update_ndn.bv_len ) {
  99                 /* we SHOULD return a referral in this case */
 100                 BerVarray defref = NULL;
 101                 if ( !LDAP_STAILQ_EMPTY( &op->o_bd->be_syncinfo )) {
 102                         syncinfo_t *si;
 103                         LDAP_STAILQ_FOREACH( si, &op->o_bd->be_syncinfo, si_next ) {
 104                                 struct berval tmpbv;
 105                                 ber_dupbv( &tmpbv, &si->si_provideruri_bv[0] );
 106                                 ber_bvarray_add( &defref, &tmpbv );
 107                         }
 108                 } else {
 109                         defref = referral_rewrite( op->o_bd->be_update_refs,
 110                                 NULL, NULL, LDAP_SCOPE_DEFAULT );
 111                 }
 112                 rs->sr_ref = defref;
 113                 return LDAP_REFERRAL;
 114         }
 115 #endif /* !SLAPD_MULTIMASTER */
 116         if ( new.bv_len == 0 ) {
 117                 slap_passwd_generate( &new );
 118                 freenew = 1;
 119         }
 120         if ( new.bv_len == 0 ) {
 121                 rs->sr_text = "password generation failed";
 122                 return LDAP_OTHER;
 123         }
 124         slap_passwd_hash( &new, &hash, &rs->sr_text );
 125         if ( freenew ) {
 126                 free( new.bv_val );
 127         }
 128         if ( hash.bv_len == 0 ) {
 129                 if ( !rs->sr_text ) {
 130                         rs->sr_text = "password hash failed";
 131                 }
 132                 return LDAP_OTHER;
 133         }
 134         vals[0] = hash;
 135         vals[1].bv_val = NULL;
 136         ml.sml_desc = slap_schema.si_ad_userPassword;
 137         ml.sml_values = vals;
 138         ml.sml_nvalues = NULL;
 139         ml.sml_op = LDAP_MOD_REPLACE;
 140         ml.sml_next = NULL;
 141
 142         op2 = *op;
 143         op2.o_tag = LDAP_REQ_MODIFY;
 144         op2.o_callback = &cb;
 145         op2.o_req_dn = dn;
 146         op2.o_req_ndn = ndn;
 147         op2.orm_modlist = &ml;
 148
 149         modtail = &ml.sml_next;
 150         rs->sr_err = slap_mods_opattrs( &op2, &ml, modtail, &rs->sr_text,
 151                 NULL, 0 );
 152
 153         if ( rs->sr_err == LDAP_SUCCESS ) {
 154                 rs->sr_err = op2.o_bd->be_modify( &op2, rs );
 155                 if ( rs->sr_err == LDAP_SUCCESS ) {
 156                         replog( &op2 );
 157                 }
 158         }
 159         slap_mods_free( ml.sml_next );
 160         free( hash.bv_val );
 161
 162         return rs->sr_err;
 163 }
 164
 165 int slap_passwd_parse( struct berval *reqdata,
 166         struct berval *id,
 167         struct berval *oldpass,
 168         struct berval *newpass,
 169         const char **text )
 170 {
 171         int rc = LDAP_SUCCESS;
 172         ber_tag_t tag;
 173         ber_len_t len;
 174         BerElementBuffer berbuf;
 175         BerElement *ber = (BerElement *)&berbuf;
 176
 177         if( reqdata == NULL ) {
 178                 return LDAP_SUCCESS;
 179         }
 180
 181         if( reqdata->bv_len == 0 ) {
 182                 *text = "empty request data field";
 183                 return LDAP_PROTOCOL_ERROR;
 184         }
 185
 186         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
 187         ber_init2( ber, reqdata, 0 );
 188
 189         tag = ber_scanf( ber, "{" /*}*/ );
 190
 191         if( tag != LBER_ERROR ) {
 192                 tag = ber_peek_tag( ber, &len );
 193         }
 194
 195         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 196                 if( id == NULL ) {
 197 #ifdef NEW_LOGGING
 198                         LDAP_LOG( OPERATION, ERR,
 199                            "slap_passwd_parse: ID not allowed.\n", 0, 0, 0 );
 200 #else
 201                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID not allowed.\n",
 202                                 0, 0, 0 );
 203 #endif
 204
 205                         *text = "user must change own password";
 206                         rc = LDAP_UNWILLING_TO_PERFORM;
 207                         goto done;
 208                 }
 209
 210                 tag = ber_scanf( ber, "m", id );
 211
 212                 if( tag == LBER_ERROR ) {
 213 #ifdef NEW_LOGGING
 214                         LDAP_LOG( OPERATION, ERR,
 215                            "slap_passwd_parse:  ID parse failed.\n", 0, 0, 0 );
 216 #else
 217                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 218                                 0, 0, 0 );
 219 #endif
 220
 221                         goto decoding_error;
 222                 }
 223
 224                 tag = ber_peek_tag( ber, &len);
 225         }
 226
 227         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_OLD ) {
 228                 if( oldpass == NULL ) {
 229 #ifdef NEW_LOGGING
 230                         LDAP_LOG( OPERATION, ERR,
 231                            "slap_passwd_parse: OLD not allowed.\n" , 0, 0, 0 );
 232 #else
 233                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD not allowed.\n",
 234                                 0, 0, 0 );
 235 #endif
 236
 237                         *text = "use bind to verify old password";
 238                         rc = LDAP_UNWILLING_TO_PERFORM;
 239                         goto done;
 240                 }
 241
 242                 tag = ber_scanf( ber, "m", oldpass );
 243
 244                 if( tag == LBER_ERROR ) {
 245 #ifdef NEW_LOGGING
 246                         LDAP_LOG( OPERATION, ERR,
 247                            "slap_passwd_parse:  ID parse failed.\n" , 0, 0, 0 );
 248 #else
 249                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 250                                 0, 0, 0 );
 251 #endif
 252
 253                         goto decoding_error;
 254                 }
 255
 256                 tag = ber_peek_tag( ber, &len );
 257         }
 258
 259         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_NEW ) {
 260                 if( newpass == NULL ) {
 261 #ifdef NEW_LOGGING
 262                         LDAP_LOG( OPERATION, ERR,
 263                            "slap_passwd_parse:  NEW not allowed.\n", 0, 0, 0 );
 264 #else
 265                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: NEW not allowed.\n",
 266                                 0, 0, 0 );
 267 #endif
 268
 269                         *text = "user specified passwords disallowed";
 270                         rc = LDAP_UNWILLING_TO_PERFORM;
 271                         goto done;
 272                 }
 273
 274                 tag = ber_scanf( ber, "m", newpass );
 275
 276                 if( tag == LBER_ERROR ) {
 277 #ifdef NEW_LOGGING
 278                         LDAP_LOG( OPERATION, ERR,
 279                            "slap_passwd_parse:  OLD parse failed.\n", 0, 0, 0 );
 280 #else
 281                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD parse failed.\n",
 282                                 0, 0, 0 );
 283 #endif
 284
 285                         goto decoding_error;
 286                 }
 287
 288                 tag = ber_peek_tag( ber, &len );
 289         }
 290
 291         if( len != 0 ) {
 292 decoding_error:
 293 #ifdef NEW_LOGGING
 294                 LDAP_LOG( OPERATION, ERR,
 295                         "slap_passwd_parse: decoding error, len=%ld\n", (long)len, 0, 0 );
 296 #else
 297                 Debug( LDAP_DEBUG_TRACE,
 298                         "slap_passwd_parse: decoding error, len=%ld\n",
 299                         (long) len, 0, 0 );
 300 #endif
 301
 302                 *text = "data decoding error";
 303                 rc = LDAP_PROTOCOL_ERROR;
 304         }
 305
 306 done:
 307         return rc;
 308 }
 309
 310 struct berval * slap_passwd_return(
 311         struct berval           *cred )
 312 {
 313         int rc;
 314         struct berval *bv = NULL;
 315         BerElementBuffer berbuf;
 316         /* opaque structure, size unknown but smaller than berbuf */
 317         BerElement *ber = (BerElement *)&berbuf;
 318
 319         assert( cred != NULL );
 320
 321 #ifdef NEW_LOGGING
 322         LDAP_LOG( OPERATION, ENTRY,
 323                 "slap_passwd_return: %ld\n",(long)cred->bv_len, 0, 0 );
 324 #else
 325         Debug( LDAP_DEBUG_TRACE, "slap_passwd_return: %ld\n",
 326                 (long) cred->bv_len, 0, 0 );
 327 #endif
 328
 329         ber_init_w_nullc( ber, LBER_USE_DER );
 330
 331         rc = ber_printf( ber, "{tON}",
 332                 LDAP_TAG_EXOP_MODIFY_PASSWD_GEN, cred );
 333
 334         if( rc >= 0 ) {
 335                 (void) ber_flatten( ber, &bv );
 336         }
 337
 338         ber_free_buf( ber );
 339
 340         return bv;
 341 }
 342
 343 int
 344 slap_passwd_check(
 345         Connection *conn,
 346         Attribute *a,
 347         struct berval *cred,
 348         const char **text )
 349 {
 350         int result = 1;
 351         struct berval *bv;
 352
 353 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 354         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 355 #ifdef SLAPD_SPASSWD
 356         lutil_passwd_sasl_conn = conn->c_sasl_authctx;
 357 #endif
 358 #endif
 359
 360         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 361                 if( !lutil_passwd( bv, cred, NULL, text ) ) {
 362                         result = 0;
 363                         break;
 364                 }
 365         }
 366
 367 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 368 #ifdef SLAPD_SPASSWD
 369         lutil_passwd_sasl_conn = NULL;
 370 #endif
 371         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 372 #endif
 373
 374         return result;
 375 }
 376
 377 void
 378 slap_passwd_generate( struct berval *pass )
 379 {
 380         struct berval *tmp;
 381 #ifdef NEW_LOGGING
 382         LDAP_LOG( OPERATION, ENTRY, "slap_passwd_generate: begin\n", 0, 0, 0 );
 383 #else
 384         Debug( LDAP_DEBUG_TRACE, "slap_passwd_generate\n", 0, 0, 0 );
 385 #endif
 386         /*
 387          * generate passwords of only 8 characters as some getpass(3)
 388          * implementations truncate at 8 characters.
 389          */
 390         tmp = lutil_passwd_generate( 8 );
 391         if (tmp) {
 392                 *pass = *tmp;
 393                 free(tmp);
 394         } else {
 395                 pass->bv_val = NULL;
 396                 pass->bv_len = 0;
 397         }
 398 }
 399
 400 void
 401 slap_passwd_hash(
 402         struct berval * cred,
 403         struct berval * new,
 404         const char **text )
 405 {
 406         struct berval *tmp;
 407 #ifdef LUTIL_SHA1_BYTES
 408         char* hash = default_passwd_hash ?  default_passwd_hash : "{SSHA}";
 409 #else
 410         char* hash = default_passwd_hash ?  default_passwd_hash : "{SMD5}";
 411 #endif
 412
 413
 414 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 415         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 416 #endif
 417
 418         tmp = lutil_passwd_hash( cred , hash, text );
 419
 420 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 421         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 422 #endif
 423
 424         if( tmp == NULL ) {
 425                 new->bv_len = 0;
 426                 new->bv_val = NULL;
 427         }
 428
 429         *new = *tmp;
 430         free( tmp );
 431         return;
 432 }