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                 {
  64                         defref = referral_rewrite( op->o_bd->be_update_refs,
  65                                 NULL, NULL, LDAP_SCOPE_DEFAULT );
  66                 }
  67                 rs->sr_ref = defref;
  68                 rs->sr_err = LDAP_REFERRAL;
  69 #endif /* !SLAPD_MULTIMASTER */
  70
  71         } else {
  72                 rs->sr_err = op->o_bd->be_extended( op, rs );
  73         }
  74
  75         return rs->sr_err;
  76 }
  77
  78 int slap_passwd_parse( struct berval *reqdata,
  79         struct berval *id,
  80         struct berval *oldpass,
  81         struct berval *newpass,
  82         const char **text )
  83 {
  84         int rc = LDAP_SUCCESS;
  85         ber_tag_t tag;
  86         ber_len_t len;
  87         char berbuf[LBER_ELEMENT_SIZEOF];
  88         BerElement *ber = (BerElement *)berbuf;
  89
  90         if( reqdata == NULL ) {
  91                 return LDAP_SUCCESS;
  92         }
  93
  94         if( reqdata->bv_len == 0 ) {
  95                 *text = "empty request data field";
  96                 return LDAP_PROTOCOL_ERROR;
  97         }
  98
  99         /* ber_init2 uses reqdata directly, doesn't allocate new buffers */
 100         ber_init2( ber, reqdata, 0 );
 101
 102         tag = ber_scanf( ber, "{" /*}*/ );
 103
 104         if( tag != LBER_ERROR ) {
 105                 tag = ber_peek_tag( ber, &len );
 106         }
 107
 108         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_ID ) {
 109                 if( id == NULL ) {
 110 #ifdef NEW_LOGGING
 111                         LDAP_LOG( OPERATION, ERR,
 112                            "slap_passwd_parse: ID not allowed.\n", 0, 0, 0 );
 113 #else
 114                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID not allowed.\n",
 115                                 0, 0, 0 );
 116 #endif
 117
 118                         *text = "user must change own password";
 119                         rc = LDAP_UNWILLING_TO_PERFORM;
 120                         goto done;
 121                 }
 122
 123                 tag = ber_scanf( ber, "m", id );
 124
 125                 if( tag == LBER_ERROR ) {
 126 #ifdef NEW_LOGGING
 127                         LDAP_LOG( OPERATION, ERR,
 128                            "slap_passwd_parse:  ID parse failed.\n", 0, 0, 0 );
 129 #else
 130                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 131                                 0, 0, 0 );
 132 #endif
 133
 134                         goto decoding_error;
 135                 }
 136
 137                 tag = ber_peek_tag( ber, &len);
 138         }
 139
 140         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_OLD ) {
 141                 if( oldpass == NULL ) {
 142 #ifdef NEW_LOGGING
 143                         LDAP_LOG( OPERATION, ERR,
 144                            "slap_passwd_parse: OLD not allowed.\n" , 0, 0, 0 );
 145 #else
 146                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD not allowed.\n",
 147                                 0, 0, 0 );
 148 #endif
 149
 150                         *text = "use bind to verify old password";
 151                         rc = LDAP_UNWILLING_TO_PERFORM;
 152                         goto done;
 153                 }
 154
 155                 tag = ber_scanf( ber, "m", oldpass );
 156
 157                 if( tag == LBER_ERROR ) {
 158 #ifdef NEW_LOGGING
 159                         LDAP_LOG( OPERATION, ERR,
 160                            "slap_passwd_parse:  ID parse failed.\n" , 0, 0, 0 );
 161 #else
 162                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: ID parse failed.\n",
 163                                 0, 0, 0 );
 164 #endif
 165
 166                         goto decoding_error;
 167                 }
 168
 169                 tag = ber_peek_tag( ber, &len );
 170         }
 171
 172         if( tag == LDAP_TAG_EXOP_MODIFY_PASSWD_NEW ) {
 173                 if( newpass == NULL ) {
 174 #ifdef NEW_LOGGING
 175                         LDAP_LOG( OPERATION, ERR,
 176                            "slap_passwd_parse:  NEW not allowed.\n", 0, 0, 0 );
 177 #else
 178                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: NEW not allowed.\n",
 179                                 0, 0, 0 );
 180 #endif
 181
 182                         *text = "user specified passwords disallowed";
 183                         rc = LDAP_UNWILLING_TO_PERFORM;
 184                         goto done;
 185                 }
 186
 187                 tag = ber_scanf( ber, "m", newpass );
 188
 189                 if( tag == LBER_ERROR ) {
 190 #ifdef NEW_LOGGING
 191                         LDAP_LOG( OPERATION, ERR,
 192                            "slap_passwd_parse:  OLD parse failed.\n", 0, 0, 0 );
 193 #else
 194                         Debug( LDAP_DEBUG_TRACE, "slap_passwd_parse: OLD parse failed.\n",
 195                                 0, 0, 0 );
 196 #endif
 197
 198                         goto decoding_error;
 199                 }
 200
 201                 tag = ber_peek_tag( ber, &len );
 202         }
 203
 204         if( len != 0 ) {
 205 decoding_error:
 206 #ifdef NEW_LOGGING
 207                 LDAP_LOG( OPERATION, ERR,
 208                         "slap_passwd_parse: decoding error, len=%ld\n", (long)len, 0, 0 );
 209 #else
 210                 Debug( LDAP_DEBUG_TRACE,
 211                         "slap_passwd_parse: decoding error, len=%ld\n",
 212                         (long) len, 0, 0 );
 213 #endif
 214
 215                 *text = "data decoding error";
 216                 rc = LDAP_PROTOCOL_ERROR;
 217         }
 218
 219 done:
 220         return rc;
 221 }
 222
 223 struct berval * slap_passwd_return(
 224         struct berval           *cred )
 225 {
 226         int rc;
 227         struct berval *bv = NULL;
 228         char berbuf[LBER_ELEMENT_SIZEOF];
 229         /* opaque structure, size unknown but smaller than berbuf */
 230         BerElement *ber = (BerElement *)berbuf;
 231
 232         assert( cred != NULL );
 233
 234 #ifdef NEW_LOGGING
 235         LDAP_LOG( OPERATION, ENTRY,
 236                 "slap_passwd_return: %ld\n",(long)cred->bv_len, 0, 0 );
 237 #else
 238         Debug( LDAP_DEBUG_TRACE, "slap_passwd_return: %ld\n",
 239                 (long) cred->bv_len, 0, 0 );
 240 #endif
 241
 242         ber_init_w_nullc( ber, LBER_USE_DER );
 243
 244         rc = ber_printf( ber, "{tON}",
 245                 LDAP_TAG_EXOP_MODIFY_PASSWD_GEN, cred );
 246
 247         if( rc >= 0 ) {
 248                 (void) ber_flatten( ber, &bv );
 249         }
 250
 251         ber_free_buf( ber );
 252
 253         return bv;
 254 }
 255
 256 int
 257 slap_passwd_check(
 258         Connection *conn,
 259         Attribute *a,
 260         struct berval *cred,
 261         const char **text )
 262 {
 263         int result = 1;
 264         struct berval *bv;
 265
 266 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 267         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 268 #ifdef SLAPD_SPASSWD
 269         lutil_passwd_sasl_conn = conn->c_sasl_authctx;
 270 #endif
 271 #endif
 272
 273         for ( bv = a->a_vals; bv->bv_val != NULL; bv++ ) {
 274                 if( !lutil_passwd( bv, cred, NULL, text ) ) {
 275                         result = 0;
 276                         break;
 277                 }
 278         }
 279
 280 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 281 #ifdef SLAPD_SPASSWD
 282         lutil_passwd_sasl_conn = NULL;
 283 #endif
 284         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 285 #endif
 286
 287         return result;
 288 }
 289
 290 void
 291 slap_passwd_generate( struct berval *pass )
 292 {
 293         struct berval *tmp;
 294 #ifdef NEW_LOGGING
 295         LDAP_LOG( OPERATION, ENTRY, "slap_passwd_generate: begin\n", 0, 0, 0 );
 296 #else
 297         Debug( LDAP_DEBUG_TRACE, "slap_passwd_generate\n", 0, 0, 0 );
 298 #endif
 299         /*
 300          * generate passwords of only 8 characters as some getpass(3)
 301          * implementations truncate at 8 characters.
 302          */
 303         tmp = lutil_passwd_generate( 8 );
 304         if (tmp) {
 305                 *pass = *tmp;
 306                 free(tmp);
 307         } else {
 308                 pass->bv_val = NULL;
 309                 pass->bv_len = 0;
 310         }
 311 }
 312
 313 void
 314 slap_passwd_hash(
 315         struct berval * cred,
 316         struct berval * new,
 317         const char **text )
 318 {
 319         struct berval *tmp;
 320 #ifdef LUTIL_SHA1_BYTES
 321         char* hash = default_passwd_hash ?  default_passwd_hash : "{SSHA}";
 322 #else
 323         char* hash = default_passwd_hash ?  default_passwd_hash : "{SMD5}";
 324 #endif
 325
 326
 327 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 328         ldap_pvt_thread_mutex_lock( &passwd_mutex );
 329 #endif
 330
 331         tmp = lutil_passwd_hash( cred , hash, text );
 332
 333 #if defined( SLAPD_CRYPT ) || defined( SLAPD_SPASSWD )
 334         ldap_pvt_thread_mutex_unlock( &passwd_mutex );
 335 #endif
 336
 337         if( tmp == NULL ) {
 338                 new->bv_len = 0;
 339                 new->bv_val = NULL;
 340         }
 341
 342         *new = *tmp;
 343         free( tmp );
 344         return;
 345 }