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 ( op->o_bd->syncinfo ) {
  61                         defref = op->o_bd->syncinfo->provideruri_bv;
  62                 } else {
  63                         defref = referral_rewrite( op->o_bd->be_update_refs,
  64                                 NULL, NULL, LDAP_SCOPE_DEFAULT );
  65                 }
  66                 rs->sr_ref = defref;
  67                 rs->sr_err = LDAP_REFERRAL;
  68 #endif /* !SLAPD_MULTIMASTER */
  69
  70         } else {
  71                 rs->sr_err = op->o_bd->be_extended( op, rs );
  72         }
  73
  74         return rs->sr_err;
  75 }
  76
  77 int slap_passwd_parse( struct berval *reqdata,
  78         struct berval *id,
  79         struct berval *oldpass,
  80         struct berval *newpass,
  81         const char **text )
  82 {
  83         int rc = LDAP_SUCCESS;
  84         ber_tag_t tag;
  85         ber_len_t len;
  86         char berbuf[LBER_ELEMENT_SIZEOF];
  87         BerElement *ber = (BerElement *)berbuf;
  88
  89         if( reqdata == NULL ) {
  90                 return LDAP_SUCCESS;
  91         }
  92
  93         if( reqdata->bv_len == 0 ) {
  94                 *text = "empty request data field";
  95                 return LDAP_PROTOCOL_ERROR;
  96         }
  97
  98         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
  99         ber_init2( ber, reqdata, 0 );
 100
 101         tag = ber_scanf( ber, "{" /*}*/ );
 102
 103         if( tag != LBER_ERROR ) {
 104                 tag = ber_peek_tag( ber, &len );
 105         }
 106
 107         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 108                 if( id == NULL ) {
 109 #ifdef NEW_LOGGING
 110                         LDAP_LOG( OPERATION, ERR,
 111                            "slap_passwd_parse: ID not allowed.\n", 0, 0, 0 );
 112 #else
 113                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID not allowed.\n",
 114                                 0, 0, 0 );
 115 #endif
 116
 117                         *text = "user must change own password";
 118                         rc = LDAP_UNWILLING_TO_PERFORM;
 119                         goto done;
 120                 }
 121
 122                 tag = ber_scanf( ber, "m", id );
 123
 124                 if( tag == LBER_ERROR ) {
 125 #ifdef NEW_LOGGING
 126                         LDAP_LOG( OPERATION, ERR,
 127                            "slap_passwd_parse:  ID parse failed.\n", 0, 0, 0 );
 128 #else
 129                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 130                                 0, 0, 0 );
 131 #endif
 132
 133                         goto decoding_error;
 134                 }
 135
 136                 tag = ber_peek_tag( ber, &len);
 137         }
 138
 139         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_OLD ) {
 140                 if( oldpass == NULL ) {
 141 #ifdef NEW_LOGGING
 142                         LDAP_LOG( OPERATION, ERR,
 143                            "slap_passwd_parse: OLD not allowed.\n" , 0, 0, 0 );
 144 #else
 145                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD not allowed.\n",
 146                                 0, 0, 0 );
 147 #endif
 148
 149                         *text = "use bind to verify old password";
 150                         rc = LDAP_UNWILLING_TO_PERFORM;
 151                         goto done;
 152                 }
 153
 154                 tag = ber_scanf( ber, "m", oldpass );
 155
 156                 if( tag == LBER_ERROR ) {
 157 #ifdef NEW_LOGGING
 158                         LDAP_LOG( OPERATION, ERR,
 159                            "slap_passwd_parse:  ID parse failed.\n" , 0, 0, 0 );
 160 #else
 161                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 162                                 0, 0, 0 );
 163 #endif
 164
 165                         goto decoding_error;
 166                 }
 167
 168                 tag = ber_peek_tag( ber, &len );
 169         }
 170
 171         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_NEW ) {
 172                 if( newpass == NULL ) {
 173 #ifdef NEW_LOGGING
 174                         LDAP_LOG( OPERATION, ERR,
 175                            "slap_passwd_parse:  NEW not allowed.\n", 0, 0, 0 );
 176 #else
 177                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: NEW not allowed.\n",
 178                                 0, 0, 0 );
 179 #endif
 180
 181                         *text = "user specified passwords disallowed";
 182                         rc = LDAP_UNWILLING_TO_PERFORM;
 183                         goto done;
 184                 }
 185
 186                 tag = ber_scanf( ber, "m", newpass );
 187
 188                 if( tag == LBER_ERROR ) {
 189 #ifdef NEW_LOGGING
 190                         LDAP_LOG( OPERATION, ERR,
 191                            "slap_passwd_parse:  OLD parse failed.\n", 0, 0, 0 );
 192 #else
 193                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD parse failed.\n",
 194                                 0, 0, 0 );
 195 #endif
 196
 197                         goto decoding_error;
 198                 }
 199
 200                 tag = ber_peek_tag( ber, &len );
 201         }
 202
 203         if( len != 0 ) {
 204 decoding_error:
 205 #ifdef NEW_LOGGING
 206                 LDAP_LOG( OPERATION, ERR,
 207                         "slap_passwd_parse: decoding error, len=%ld\n", (long)len, 0, 0 );
 208 #else
 209                 Debug( LDAP_DEBUG_TRACE,
 210                         "slap_passwd_parse: decoding error, len=%ld\n",
 211                         (long) len, 0, 0 );
 212 #endif
 213
 214                 *text = "data decoding error";
 215                 rc = LDAP_PROTOCOL_ERROR;
 216         }
 217
 218 done:
 219         return rc;
 220 }
 221
 222 struct berval * slap_passwd_return(
 223         struct berval           *cred )
 224 {
 225         int rc;
 226         struct berval *bv = NULL;
 227         char berbuf[LBER_ELEMENT_SIZEOF];
 228         /* opaque structure, size unknown but smaller than berbuf */
 229         BerElement *ber = (BerElement *)berbuf;
 230
 231         assert( cred != NULL );
 232
 233 #ifdef NEW_LOGGING
 234         LDAP_LOG( OPERATION, ENTRY,
 235                 "slap_passwd_return: %ld\n",(long)cred->bv_len, 0, 0 );
 236 #else
 237         Debug( LDAP_DEBUG_TRACE, "slap_passwd_return: %ld\n",
 238                 (long) cred->bv_len, 0, 0 );
 239 #endif
 240
 241         ber_init_w_nullc( ber, LBER_USE_DER );
 242
 243         rc = ber_printf( ber, "{tON}",
 244                 LDAP_TAG_EXOP_MODIFY_PASSWD_GEN, cred );
 245
 246         if( rc >= 0 ) {
 247                 (void) ber_flatten( ber, &bv );
 248         }
 249
 250         ber_free_buf( ber );
 251
 252         return bv;
 253 }
 254
 255 int
 256 slap_passwd_check(
 257         Connection *conn,
 258         Attribute *a,
 259         struct berval *cred,
 260         const char **text )
 261 {
 262         int result = 1;
 263         struct berval *bv;
 264
 265 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 266         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 267 #ifdef SLAPD_SPASSWD
 268         lutil_passwd_sasl_conn = conn->c_sasl_authctx;
 269 #endif
 270 #endif
 271
 272         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 273                 if( !lutil_passwd( bv, cred, NULL, text ) ) {
 274                         result = 0;
 275                         break;
 276                 }
 277         }
 278
 279 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 280 #ifdef SLAPD_SPASSWD
 281         lutil_passwd_sasl_conn = NULL;
 282 #endif
 283         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 284 #endif
 285
 286         return result;
 287 }
 288
 289 void
 290 slap_passwd_generate( struct berval *pass )
 291 {
 292         struct berval *tmp;
 293 #ifdef NEW_LOGGING
 294         LDAP_LOG( OPERATION, ENTRY, "slap_passwd_generate: begin\n", 0, 0, 0 );
 295 #else
 296         Debug( LDAP_DEBUG_TRACE, "slap_passwd_generate\n", 0, 0, 0 );
 297 #endif
 298         /*
 299          * generate passwords of only 8 characters as some getpass(3)
 300          * implementations truncate at 8 characters.
 301          */
 302         tmp = lutil_passwd_generate( 8 );
 303         if (tmp) {
 304                 *pass = *tmp;
 305                 free(tmp);
 306         } else {
 307                 pass->bv_val = NULL;
 308                 pass->bv_len = 0;
 309         }
 310 }
 311
 312 void
 313 slap_passwd_hash(
 314         struct berval * cred,
 315         struct berval * new,
 316         const char **text )
 317 {
 318         struct berval *tmp;
 319 #ifdef LUTIL_SHA1_BYTES
 320         char* hash = default_passwd_hash ?  default_passwd_hash : "{SSHA}";
 321 #else
 322         char* hash = default_passwd_hash ?  default_passwd_hash : "{SMD5}";
 323 #endif
 324
 325
 326 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 327         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 328 #endif
 329
 330         tmp = lutil_passwd_hash( cred , hash, text );
 331
 332 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 333         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 334 #endif
 335
 336         if( tmp == NULL ) {
 337                 new->bv_len = 0;
 338                 new->bv_val = NULL;
 339         }
 340
 341         *new = *tmp;
 342         free( tmp );
 343         return;
 344 }