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

   1 /* bind.c - ldbm backend bind and unbind routines */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/krb.h>
  13 #include <ac/socket.h>
  14 #include <ac/string.h>
  15 #include <ac/unistd.h>
  16
  17 #include "slap.h"
  18
  19 #include <lber_pvt.h>
  20 #include <lutil.h>
  21
  22 int passwd_extop(
  23         Operation *op,
  24         SlapReply *rs )
  25 {
  26         assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
  27
  28         if( op->o_dn.bv_len == 0 ) {
  29                 rs->sr_text = "only authenticated users may change passwords";
  30                 return LDAP_STRONG_AUTH_REQUIRED;
  31         }
  32
  33         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  34         op->o_bd = op->o_conn->c_authz_backend;
  35         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  36
  37         if( op->o_bd && !op->o_bd->be_extended ) {
  38                 rs->sr_text = "operation not supported for current user";
  39                 return LDAP_UNWILLING_TO_PERFORM;
  40         }
  41
  42         if (backend_check_restrictions( op, rs,
  43                         (struct berval *)&slap_EXOP_MODIFY_PASSWD ) != LDAP_SUCCESS) {
  44                 return rs->sr_err;
  45         }
  46
  47         if( op->o_bd == NULL ) {
  48 #ifdef HAVE_CYRUS_SASL
  49                 rs->sr_err = slap_sasl_setpass( op, rs );
  50 #else
  51                 rs->sr_text = "no authz backend";
  52                 rs->sr_err = LDAP_OTHER;
  53 #endif
  54
  55 #ifndef SLAPD_MULTIMASTER
  56         /* This does not apply to multi-master case */
  57         } else if( op->o_bd->be_update_ndn.bv_len ) {
  58                 /* we SHOULD return a referral in this case */
  59                 BerVarray defref = NULL;
  60                 if ( !LDAP_STAILQ_EMPTY( &op->o_bd->be_syncinfo )) {
  61                         syncinfo_t *si;
  62                         LDAP_STAILQ_FOREACH( si, &op->o_bd->be_syncinfo, si_next ) {
  63                                 struct berval tmpbv;
  64                                 ber_dupbv( &tmpbv, &si->si_provideruri_bv[0] );
  65                                 ber_bvarray_add( &defref, &tmpbv );
  66                         }
  67                 } else {
  68                         defref = referral_rewrite( op->o_bd->be_update_refs,
  69                                 NULL, NULL, LDAP_SCOPE_DEFAULT );
  70                 }
  71                 rs->sr_ref = defref;
  72                 rs->sr_err = LDAP_REFERRAL;
  73 #endif /* !SLAPD_MULTIMASTER */
  74
  75         } else {
  76                 rs->sr_err = op->o_bd->be_extended( op, rs );
  77         }
  78
  79         return rs->sr_err;
  80 }
  81
  82 int slap_passwd_parse( struct berval *reqdata,
  83         struct berval *id,
  84         struct berval *oldpass,
  85         struct berval *newpass,
  86         const char **text )
  87 {
  88         int rc = LDAP_SUCCESS;
  89         ber_tag_t tag;
  90         ber_len_t len;
  91         BerElementBuffer berbuf;
  92         BerElement *ber = (BerElement *)&berbuf;
  93
  94         if( reqdata == NULL ) {
  95                 return LDAP_SUCCESS;
  96         }
  97
  98         if( reqdata->bv_len == 0 ) {
  99                 *text = "empty request data field";
 100                 return LDAP_PROTOCOL_ERROR;
 101         }
 102
 103         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
 104         ber_init2( ber, reqdata, 0 );
 105
 106         tag = ber_scanf( ber, "{" /*}*/ );
 107
 108         if( tag != LBER_ERROR ) {
 109                 tag = ber_peek_tag( ber, &len );
 110         }
 111
 112         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 113                 if( id == NULL ) {
 114 #ifdef NEW_LOGGING
 115                         LDAP_LOG( OPERATION, ERR,
 116                            "slap_passwd_parse: ID not allowed.\n", 0, 0, 0 );
 117 #else
 118                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID not allowed.\n",
 119                                 0, 0, 0 );
 120 #endif
 121
 122                         *text = "user must change own password";
 123                         rc = LDAP_UNWILLING_TO_PERFORM;
 124                         goto done;
 125                 }
 126
 127                 tag = ber_scanf( ber, "m", id );
 128
 129                 if( tag == LBER_ERROR ) {
 130 #ifdef NEW_LOGGING
 131                         LDAP_LOG( OPERATION, ERR,
 132                            "slap_passwd_parse:  ID parse failed.\n", 0, 0, 0 );
 133 #else
 134                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 135                                 0, 0, 0 );
 136 #endif
 137
 138                         goto decoding_error;
 139                 }
 140
 141                 tag = ber_peek_tag( ber, &len);
 142         }
 143
 144         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_OLD ) {
 145                 if( oldpass == NULL ) {
 146 #ifdef NEW_LOGGING
 147                         LDAP_LOG( OPERATION, ERR,
 148                            "slap_passwd_parse: OLD not allowed.\n" , 0, 0, 0 );
 149 #else
 150                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD not allowed.\n",
 151                                 0, 0, 0 );
 152 #endif
 153
 154                         *text = "use bind to verify old password";
 155                         rc = LDAP_UNWILLING_TO_PERFORM;
 156                         goto done;
 157                 }
 158
 159                 tag = ber_scanf( ber, "m", oldpass );
 160
 161                 if( tag == LBER_ERROR ) {
 162 #ifdef NEW_LOGGING
 163                         LDAP_LOG( OPERATION, ERR,
 164                            "slap_passwd_parse:  ID parse failed.\n" , 0, 0, 0 );
 165 #else
 166                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 167                                 0, 0, 0 );
 168 #endif
 169
 170                         goto decoding_error;
 171                 }
 172
 173                 tag = ber_peek_tag( ber, &len );
 174         }
 175
 176         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_NEW ) {
 177                 if( newpass == NULL ) {
 178 #ifdef NEW_LOGGING
 179                         LDAP_LOG( OPERATION, ERR,
 180                            "slap_passwd_parse:  NEW not allowed.\n", 0, 0, 0 );
 181 #else
 182                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: NEW not allowed.\n",
 183                                 0, 0, 0 );
 184 #endif
 185
 186                         *text = "user specified passwords disallowed";
 187                         rc = LDAP_UNWILLING_TO_PERFORM;
 188                         goto done;
 189                 }
 190
 191                 tag = ber_scanf( ber, "m", newpass );
 192
 193                 if( tag == LBER_ERROR ) {
 194 #ifdef NEW_LOGGING
 195                         LDAP_LOG( OPERATION, ERR,
 196                            "slap_passwd_parse:  OLD parse failed.\n", 0, 0, 0 );
 197 #else
 198                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD parse failed.\n",
 199                                 0, 0, 0 );
 200 #endif
 201
 202                         goto decoding_error;
 203                 }
 204
 205                 tag = ber_peek_tag( ber, &len );
 206         }
 207
 208         if( len != 0 ) {
 209 decoding_error:
 210 #ifdef NEW_LOGGING
 211                 LDAP_LOG( OPERATION, ERR,
 212                         "slap_passwd_parse: decoding error, len=%ld\n", (long)len, 0, 0 );
 213 #else
 214                 Debug( LDAP_DEBUG_TRACE,
 215                         "slap_passwd_parse: decoding error, len=%ld\n",
 216                         (long) len, 0, 0 );
 217 #endif
 218
 219                 *text = "data decoding error";
 220                 rc = LDAP_PROTOCOL_ERROR;
 221         }
 222
 223 done:
 224         return rc;
 225 }
 226
 227 struct berval * slap_passwd_return(
 228         struct berval           *cred )
 229 {
 230         int rc;
 231         struct berval *bv = NULL;
 232         BerElementBuffer berbuf;
 233         /* opaque structure, size unknown but smaller than berbuf */
 234         BerElement *ber = (BerElement *)&berbuf;
 235
 236         assert( cred != NULL );
 237
 238 #ifdef NEW_LOGGING
 239         LDAP_LOG( OPERATION, ENTRY,
 240                 "slap_passwd_return: %ld\n",(long)cred->bv_len, 0, 0 );
 241 #else
 242         Debug( LDAP_DEBUG_TRACE, "slap_passwd_return: %ld\n",
 243                 (long) cred->bv_len, 0, 0 );
 244 #endif
 245
 246         ber_init_w_nullc( ber, LBER_USE_DER );
 247
 248         rc = ber_printf( ber, "{tON}",
 249                 LDAP_TAG_EXOP_MODIFY_PASSWD_GEN, cred );
 250
 251         if( rc >= 0 ) {
 252                 (void) ber_flatten( ber, &bv );
 253         }
 254
 255         ber_free_buf( ber );
 256
 257         return bv;
 258 }
 259
 260 int
 261 slap_passwd_check(
 262         Connection *conn,
 263         Attribute *a,
 264         struct berval *cred,
 265         const char **text )
 266 {
 267         int result = 1;
 268         struct berval *bv;
 269
 270 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 271         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 272 #ifdef SLAPD_SPASSWD
 273         lutil_passwd_sasl_conn = conn->c_sasl_authctx;
 274 #endif
 275 #endif
 276
 277         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 278                 if( !lutil_passwd( bv, cred, NULL, text ) ) {
 279                         result = 0;
 280                         break;
 281                 }
 282         }
 283
 284 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 285 #ifdef SLAPD_SPASSWD
 286         lutil_passwd_sasl_conn = NULL;
 287 #endif
 288         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 289 #endif
 290
 291         return result;
 292 }
 293
 294 void
 295 slap_passwd_generate( struct berval *pass )
 296 {
 297         struct berval *tmp;
 298 #ifdef NEW_LOGGING
 299         LDAP_LOG( OPERATION, ENTRY, "slap_passwd_generate: begin\n", 0, 0, 0 );
 300 #else
 301         Debug( LDAP_DEBUG_TRACE, "slap_passwd_generate\n", 0, 0, 0 );
 302 #endif
 303         /*
 304          * generate passwords of only 8 characters as some getpass(3)
 305          * implementations truncate at 8 characters.
 306          */
 307         tmp = lutil_passwd_generate( 8 );
 308         if (tmp) {
 309                 *pass = *tmp;
 310                 free(tmp);
 311         } else {
 312                 pass->bv_val = NULL;
 313                 pass->bv_len = 0;
 314         }
 315 }
 316
 317 void
 318 slap_passwd_hash(
 319         struct berval * cred,
 320         struct berval * new,
 321         const char **text )
 322 {
 323         struct berval *tmp;
 324 #ifdef LUTIL_SHA1_BYTES
 325         char* hash = default_passwd_hash ?  default_passwd_hash : "{SSHA}";
 326 #else
 327         char* hash = default_passwd_hash ?  default_passwd_hash : "{SMD5}";
 328 #endif
 329
 330
 331 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 332         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 333 #endif
 334
 335         tmp = lutil_passwd_hash( cred , hash, text );
 336
 337 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 338         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 339 #endif
 340
 341         if( tmp == NULL ) {
 342                 new->bv_len = 0;
 343                 new->bv_val = NULL;
 344         }
 345
 346         *new = *tmp;
 347         free( tmp );
 348         return;
 349 }