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