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