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 tmpbv, id, old, new;
  36
  37         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
  38
  39         if( op->o_dn.bv_len == 0 ) {
  40                 rs->sr_text = "only authenticated users may change passwords";
  41                 return LDAP_STRONG_AUTH_REQUIRED;
  42         }
  43
  44         /* FIXME: need to parse the reqdata to determine the backend
  45          * of the DN the passwd_extop () will apply to; this, on turn,
  46          * requires to duplicate the reqdata because slap_passwd_parse()
  47          * apparently alters it!
  48          *
  49          * Maybe we can make a lightweight version of slap_passwd_parse()
  50          * that extracts the DN with no impact on the reqdata value?
  51          */
  52         ber_dupbv_x( &tmpbv, op->oq_extended.rs_reqdata, op->o_tmpmemctx );
  53         rs->sr_err = slap_passwd_parse( &tmpbv, &id, &old, &new, &rs->sr_text );
  54         if (rs->sr_err != LDAP_SUCCESS) {
  55                 ber_memfree_x( tmpbv.bv_val, op->o_tmpmemctx );
  56                 return rs->sr_err;
  57         }
  58
  59         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  60         /* FIXME: we select the appropriate backend based on the DN
  61          * in the reqdata
  62          */
  63         if ( id.bv_len ) {
  64                 op->o_bd = select_backend( &id, 0, 0 );
  65
  66         } else {
  67                 op->o_bd = op->o_conn->c_authz_backend;
  68         }
  69         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  70         ber_memfree_x( tmpbv.bv_val, op->o_tmpmemctx );
  71
  72         if( op->o_bd && !op->o_bd->be_extended ) {
  73                 rs->sr_text = "operation not supported for current user";
  74                 return LDAP_UNWILLING_TO_PERFORM;
  75         }
  76
  77         if (backend_check_restrictions( op, rs,
  78                         (struct berval *)&slap_EXOP_MODIFY_PASSWD ) != LDAP_SUCCESS) {
  79                 return rs->sr_err;
  80         }
  81
  82         if( op->o_bd == NULL ) {
  83 #ifdef HAVE_CYRUS_SASL
  84                 rs->sr_err = slap_sasl_setpass( op, rs );
  85 #else
  86                 rs->sr_text = "no authz backend";
  87                 rs->sr_err = LDAP_OTHER;
  88 #endif
  89
  90 #ifndef SLAPD_MULTIMASTER
  91         /* This does not apply to multi-master case */
  92         } else if( op->o_bd->be_update_ndn.bv_len ) {
  93                 /* we SHOULD return a referral in this case */
  94                 BerVarray defref = NULL;
  95                 if ( !LDAP_STAILQ_EMPTY( &op->o_bd->be_syncinfo )) {
  96                         syncinfo_t *si;
  97                         LDAP_STAILQ_FOREACH( si, &op->o_bd->be_syncinfo, si_next ) {
  98                                 struct berval tmpbv;
  99                                 ber_dupbv( &tmpbv, &si->si_provideruri_bv[0] );
 100                                 ber_bvarray_add( &defref, &tmpbv );
 101                         }
 102                 } else {
 103                         defref = referral_rewrite( op->o_bd->be_update_refs,
 104                                 NULL, NULL, LDAP_SCOPE_DEFAULT );
 105                 }
 106                 rs->sr_ref = defref;
 107                 rs->sr_err = LDAP_REFERRAL;
 108 #endif /* !SLAPD_MULTIMASTER */
 109
 110         } else {
 111                 rs->sr_err = op->o_bd->be_extended( op, rs );
 112         }
 113
 114         return rs->sr_err;
 115 }
 116
 117 int slap_passwd_parse( struct berval *reqdata,
 118         struct berval *id,
 119         struct berval *oldpass,
 120         struct berval *newpass,
 121         const char **text )
 122 {
 123         int rc = LDAP_SUCCESS;
 124         ber_tag_t tag;
 125         ber_len_t len;
 126         BerElementBuffer berbuf;
 127         BerElement *ber = (BerElement *)&berbuf;
 128
 129         if( reqdata == NULL ) {
 130                 return LDAP_SUCCESS;
 131         }
 132
 133         if( reqdata->bv_len == 0 ) {
 134                 *text = "empty request data field";
 135                 return LDAP_PROTOCOL_ERROR;
 136         }
 137
 138         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
 139         ber_init2( ber, reqdata, 0 );
 140
 141         tag = ber_scanf( ber, "{" /*}*/ );
 142
 143         if( tag != LBER_ERROR ) {
 144                 tag = ber_peek_tag( ber, &len );
 145         }
 146
 147         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 148                 if( id == NULL ) {
 149 #ifdef NEW_LOGGING
 150                         LDAP_LOG( OPERATION, ERR,
 151                            "slap_passwd_parse: ID not allowed.\n", 0, 0, 0 );
 152 #else
 153                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID not allowed.\n",
 154                                 0, 0, 0 );
 155 #endif
 156
 157                         *text = "user must change own password";
 158                         rc = LDAP_UNWILLING_TO_PERFORM;
 159                         goto done;
 160                 }
 161
 162                 tag = ber_scanf( ber, "m", id );
 163
 164                 if( tag == LBER_ERROR ) {
 165 #ifdef NEW_LOGGING
 166                         LDAP_LOG( OPERATION, ERR,
 167                            "slap_passwd_parse:  ID parse failed.\n", 0, 0, 0 );
 168 #else
 169                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 170                                 0, 0, 0 );
 171 #endif
 172
 173                         goto decoding_error;
 174                 }
 175
 176                 tag = ber_peek_tag( ber, &len);
 177         }
 178
 179         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_OLD ) {
 180                 if( oldpass == NULL ) {
 181 #ifdef NEW_LOGGING
 182                         LDAP_LOG( OPERATION, ERR,
 183                            "slap_passwd_parse: OLD not allowed.\n" , 0, 0, 0 );
 184 #else
 185                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD not allowed.\n",
 186                                 0, 0, 0 );
 187 #endif
 188
 189                         *text = "use bind to verify old password";
 190                         rc = LDAP_UNWILLING_TO_PERFORM;
 191                         goto done;
 192                 }
 193
 194                 tag = ber_scanf( ber, "m", oldpass );
 195
 196                 if( tag == LBER_ERROR ) {
 197 #ifdef NEW_LOGGING
 198                         LDAP_LOG( OPERATION, ERR,
 199                            "slap_passwd_parse:  ID parse failed.\n" , 0, 0, 0 );
 200 #else
 201                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 202                                 0, 0, 0 );
 203 #endif
 204
 205                         goto decoding_error;
 206                 }
 207
 208                 tag = ber_peek_tag( ber, &len );
 209         }
 210
 211         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_NEW ) {
 212                 if( newpass == NULL ) {
 213 #ifdef NEW_LOGGING
 214                         LDAP_LOG( OPERATION, ERR,
 215                            "slap_passwd_parse:  NEW not allowed.\n", 0, 0, 0 );
 216 #else
 217                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: NEW not allowed.\n",
 218                                 0, 0, 0 );
 219 #endif
 220
 221                         *text = "user specified passwords disallowed";
 222                         rc = LDAP_UNWILLING_TO_PERFORM;
 223                         goto done;
 224                 }
 225
 226                 tag = ber_scanf( ber, "m", newpass );
 227
 228                 if( tag == LBER_ERROR ) {
 229 #ifdef NEW_LOGGING
 230                         LDAP_LOG( OPERATION, ERR,
 231                            "slap_passwd_parse:  OLD parse failed.\n", 0, 0, 0 );
 232 #else
 233                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD parse failed.\n",
 234                                 0, 0, 0 );
 235 #endif
 236
 237                         goto decoding_error;
 238                 }
 239
 240                 tag = ber_peek_tag( ber, &len );
 241         }
 242
 243         if( len != 0 ) {
 244 decoding_error:
 245 #ifdef NEW_LOGGING
 246                 LDAP_LOG( OPERATION, ERR,
 247                         "slap_passwd_parse: decoding error, len=%ld\n", (long)len, 0, 0 );
 248 #else
 249                 Debug( LDAP_DEBUG_TRACE,
 250                         "slap_passwd_parse: decoding error, len=%ld\n",
 251                         (long) len, 0, 0 );
 252 #endif
 253
 254                 *text = "data decoding error";
 255                 rc = LDAP_PROTOCOL_ERROR;
 256         }
 257
 258 done:
 259         return rc;
 260 }
 261
 262 struct berval * slap_passwd_return(
 263         struct berval           *cred )
 264 {
 265         int rc;
 266         struct berval *bv = NULL;
 267         BerElementBuffer berbuf;
 268         /* opaque structure, size unknown but smaller than berbuf */
 269         BerElement *ber = (BerElement *)&berbuf;
 270
 271         assert( cred != NULL );
 272
 273 #ifdef NEW_LOGGING
 274         LDAP_LOG( OPERATION, ENTRY,
 275                 "slap_passwd_return: %ld\n",(long)cred->bv_len, 0, 0 );
 276 #else
 277         Debug( LDAP_DEBUG_TRACE, "slap_passwd_return: %ld\n",
 278                 (long) cred->bv_len, 0, 0 );
 279 #endif
 280
 281         ber_init_w_nullc( ber, LBER_USE_DER );
 282
 283         rc = ber_printf( ber, "{tON}",
 284                 LDAP_TAG_EXOP_MODIFY_PASSWD_GEN, cred );
 285
 286         if( rc >= 0 ) {
 287                 (void) ber_flatten( ber, &bv );
 288         }
 289
 290         ber_free_buf( ber );
 291
 292         return bv;
 293 }
 294
 295 int
 296 slap_passwd_check(
 297         Connection *conn,
 298         Attribute *a,
 299         struct berval *cred,
 300         const char **text )
 301 {
 302         int result = 1;
 303         struct berval *bv;
 304
 305 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 306         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 307 #ifdef SLAPD_SPASSWD
 308         lutil_passwd_sasl_conn = conn->c_sasl_authctx;
 309 #endif
 310 #endif
 311
 312         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 313                 if( !lutil_passwd( bv, cred, NULL, text ) ) {
 314                         result = 0;
 315                         break;
 316                 }
 317         }
 318
 319 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 320 #ifdef SLAPD_SPASSWD
 321         lutil_passwd_sasl_conn = NULL;
 322 #endif
 323         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 324 #endif
 325
 326         return result;
 327 }
 328
 329 void
 330 slap_passwd_generate( struct berval *pass )
 331 {
 332         struct berval *tmp;
 333 #ifdef NEW_LOGGING
 334         LDAP_LOG( OPERATION, ENTRY, "slap_passwd_generate: begin\n", 0, 0, 0 );
 335 #else
 336         Debug( LDAP_DEBUG_TRACE, "slap_passwd_generate\n", 0, 0, 0 );
 337 #endif
 338         /*
 339          * generate passwords of only 8 characters as some getpass(3)
 340          * implementations truncate at 8 characters.
 341          */
 342         tmp = lutil_passwd_generate( 8 );
 343         if (tmp) {
 344                 *pass = *tmp;
 345                 free(tmp);
 346         } else {
 347                 pass->bv_val = NULL;
 348                 pass->bv_len = 0;
 349         }
 350 }
 351
 352 void
 353 slap_passwd_hash(
 354         struct berval * cred,
 355         struct berval * new,
 356         const char **text )
 357 {
 358         struct berval *tmp;
 359 #ifdef LUTIL_SHA1_BYTES
 360         char* hash = default_passwd_hash ?  default_passwd_hash : "{SSHA}";
 361 #else
 362         char* hash = default_passwd_hash ?  default_passwd_hash : "{SMD5}";
 363 #endif
 364
 365
 366 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 367         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 368 #endif
 369
 370         tmp = lutil_passwd_hash( cred , hash, text );
 371
 372 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 373         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 374 #endif
 375
 376         if( tmp == NULL ) {
 377                 new->bv_len = 0;
 378                 new->bv_val = NULL;
 379         }
 380
 381         *new = *tmp;
 382         free( tmp );
 383         return;
 384 }