text: /* $OpenLDAP$ */
  /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   *
   * Copyright 1998-2015 The OpenLDAP Foundation.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted only as authorized by the OpenLDAP
   * Public License.
   *
   * A copy of this license is available in the file LICENSE in the
   * top-level directory of the distribution or, alternatively, at
   * <http://www.OpenLDAP.org/license.html>.
   */
  
  #include "portable.h"
  
  #include <stdio.h>
  #ifdef HAVE_LIMITS_H
  #include <limits.h>
  #endif
  
  #include <ac/stdlib.h>
  #include <ac/string.h>
  
  #include <lber.h>
  #include <ldap_log.h>
  
  #include "slap.h"
  
  #ifdef ENABLE_REWRITE
  #include <rewrite.h>
  #endif
  
  #ifdef HAVE_CYRUS_SASL
  # ifdef HAVE_SASL_SASL_H
  #  include <sasl/sasl.h>
  #  include <sasl/saslplug.h>
  # else
  #  include <sasl.h>
  #  include <saslplug.h>
  # endif
  
  # define	SASL_CONST const
  
  #define SASL_VERSION_FULL	((SASL_VERSION_MAJOR << 16) |\
  	(SASL_VERSION_MINOR << 8) | SASL_VERSION_STEP)
  
  static sasl_security_properties_t sasl_secprops;
  #elif defined( SLAP_BUILTIN_SASL )
  /*
   * built-in SASL implementation
   *	only supports EXTERNAL
   */
  typedef struct sasl_ctx {
  	slap_ssf_t sc_external_ssf;
  	struct berval sc_external_id;
  } SASL_CTX;
  
  #endif
  
  #include <lutil.h>
  
  static struct berval ext_bv = BER_BVC( "EXTERNAL" );
  
  char *slap_sasl_auxprops;
  
  #ifdef HAVE_CYRUS_SASL
  
  /* Just use our internal auxprop by default */
  static int
  slap_sasl_getopt(
  	void *context,
  	const char *plugin_name,
  	const char *option,
  	const char **result,
  	unsigned *len)
  {
  	if ( strcmp( option, "auxprop_plugin" )) {
  		return SASL_FAIL;
  	}
  	if ( slap_sasl_auxprops )
  		*result = slap_sasl_auxprops;
  	else
  		*result = "slapd";
  	return SASL_OK;
  }
  
  int
  slap_sasl_log(
  	void *context,
  	int priority,
  	const char *message) 
  {
  	Connection *conn = context;
  	int level;
  	const char * label;
  
  	if ( message == NULL ) {
  		return SASL_BADPARAM;
  	}
  
  	switch (priority) {
  	case SASL_LOG_NONE:
  		level = LDAP_DEBUG_NONE;
  		label = "None";
  		break;
  	case SASL_LOG_ERR:
  		level = LDAP_DEBUG_ANY;
  		label = "Error";
  		break;
  	case SASL_LOG_FAIL:
  		level = LDAP_DEBUG_ANY;
  		label = "Failure";
  		break;
  	case SASL_LOG_WARN:
  		level = LDAP_DEBUG_TRACE;
  		label = "Warning";
  		break;
  	case SASL_LOG_NOTE:
  		level = LDAP_DEBUG_TRACE;
  		label = "Notice";
  		break;
  	case SASL_LOG_DEBUG:
  		level = LDAP_DEBUG_TRACE;
  		label = "Debug";
  		break;
  	case SASL_LOG_TRACE:
  		level = LDAP_DEBUG_TRACE;
  		label = "Trace";
  		break;
  	case SASL_LOG_PASS:
  		level = LDAP_DEBUG_TRACE;
  		label = "Password Trace";
  		break;
  	default:
  		return SASL_BADPARAM;
  	}
  
  	Debug( level, "SASL [conn=%ld] %s: %s\n",
  		conn ? (long) conn->c_connid: -1L,
  		label, message );
  
  
  	return SASL_OK;
  }
  
  static const char *slap_propnames[] = {
  	"*slapConn", "*slapAuthcDNlen", "*slapAuthcDN",
  	"*slapAuthzDNlen", "*slapAuthzDN", NULL };
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  int slap_dontUseCopy_ignore;
  BerVarray slap_dontUseCopy_propnames;
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL };
  static struct berval generic_filterstr = BER_BVC("(objectclass=*)");
  
  #define	SLAP_SASL_PROP_CONN	0
  #define	SLAP_SASL_PROP_AUTHCLEN	1
  #define	SLAP_SASL_PROP_AUTHC	2
  #define	SLAP_SASL_PROP_AUTHZLEN	3
  #define	SLAP_SASL_PROP_AUTHZ	4
  #define	SLAP_SASL_PROP_COUNT	5	/* Number of properties we used */
  
  typedef struct lookup_info {
  	int flags;
  	const struct propval *list;
  	sasl_server_params_t *sparams;
  } lookup_info;
  
  static slap_response sasl_ap_lookup;
  
  static struct berval sc_cleartext = BER_BVC("{CLEARTEXT}");
  
  static int
  sasl_ap_lookup( Operation *op, SlapReply *rs )
  {
  	BerVarray bv;
  	AttributeDescription *ad;
  	Attribute *a;
  	const char *text;
  	int rc, i;
  	lookup_info *sl = (lookup_info *)op->o_callback->sc_private;
  
  	/* return the actual error code,
  	 * to allow caller to handle specific errors
  	 */
  	if (rs->sr_type != REP_SEARCH) return rs->sr_err;
  
  	for( i = 0; sl->list[i].name; i++ ) {
  		const char *name = sl->list[i].name;
  
  		if ( name[0] == '*' ) {
  			if ( sl->flags & SASL_AUXPROP_AUTHZID ) continue;
  			/* Skip our private properties */
  			if ( !strcmp( name, slap_propnames[0] )) {
  				i += SLAP_SASL_PROP_COUNT - 1;
  				continue;
  			}
  			name++;
  		} else if ( !(sl->flags & SASL_AUXPROP_AUTHZID ) )
  			continue;
  
  		if ( sl->list[i].values ) {
  			if ( !(sl->flags & SASL_AUXPROP_OVERRIDE) ) continue;
  		}
  		ad = NULL;
  		rc = slap_str2ad( name, &ad, &text );
  		if ( rc != LDAP_SUCCESS ) {
  			Debug( LDAP_DEBUG_TRACE,
  				"slap_ap_lookup: str2ad(%s): %s\n", name, text, 0 );
  			continue;
  		}
  
  		/* If it's the rootdn and a rootpw was present, we already set
  		 * it so don't override it here.
  		 */
  		if ( ad == slap_schema.si_ad_userPassword && sl->list[i].values && 
  			be_isroot_dn( op->o_bd, &op->o_req_ndn ))
  			continue;
  
  		a = attr_find( rs->sr_entry->e_attrs, ad );
  		if ( !a ) continue;
  		if ( ! access_allowed( op, rs->sr_entry, ad, NULL, ACL_AUTH, NULL ) ) {
  			continue;
  		}
  		if ( sl->list[i].values && ( sl->flags & SASL_AUXPROP_OVERRIDE ) ) {
  			sl->sparams->utils->prop_erase( sl->sparams->propctx,
  			sl->list[i].name );
  		}
  		for ( bv = a->a_vals; bv->bv_val; bv++ ) {
  			/* ITS#3846 don't give hashed passwords to SASL */
  			if ( ad == slap_schema.si_ad_userPassword &&
  				bv->bv_val[0] == '{' /*}*/ )
  			{
  				if ( lutil_passwd_scheme( bv->bv_val ) ) {
  					/* If it's not a recognized scheme, just assume it's
  					 * a cleartext password that happened to include brackets.
  					 *
  					 * If it's a recognized scheme, skip this value, unless the
  					 * scheme is {CLEARTEXT}. In that case, skip over the
  					 * scheme name and use the remainder. If there is nothing
  					 * past the scheme name, skip this value.
  					 */
  #ifdef SLAPD_CLEARTEXT
  					if ( !strncasecmp( bv->bv_val, sc_cleartext.bv_val,
  						sc_cleartext.bv_len )) {
  						struct berval cbv;
  						cbv.bv_len = bv->bv_len - sc_cleartext.bv_len;
  						if ( cbv.bv_len > 0 ) {
  							cbv.bv_val = bv->bv_val + sc_cleartext.bv_len;
  							sl->sparams->utils->prop_set( sl->sparams->propctx,
  								sl->list[i].name, cbv.bv_val, cbv.bv_len );
  						}
  					}
  #endif
  					continue;
  				}
  			}
  			sl->sparams->utils->prop_set( sl->sparams->propctx,
  				sl->list[i].name, bv->bv_val, bv->bv_len );
  		}
  	}
  	return LDAP_SUCCESS;
  }
  
  #if SASL_VERSION_FULL >= 0x020118
  static int
  #else
  static void
  #endif
  slap_auxprop_lookup(
  	void *glob_context,
  	sasl_server_params_t *sparams,
  	unsigned flags,
  	const char *user,
  	unsigned ulen)
  {
  	OperationBuffer opbuf = {{ NULL }};
  	Operation *op = (Operation *)&opbuf;
  	int i, doit = 0;
  	Connection *conn = NULL;
  	lookup_info sl;
  	int rc = LDAP_SUCCESS;
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  	int dontUseCopy = 0;
  	BackendDB *dontUseCopy_bd = NULL;
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  	sl.list = sparams->utils->prop_get( sparams->propctx );
  	sl.sparams = sparams;
  	sl.flags = flags;
  
  	/* Find our DN and conn first */
  	for( i = 0; sl.list[i].name; i++ ) {
  		if ( sl.list[i].name[0] == '*' ) {
  			if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
  				if ( sl.list[i].values && sl.list[i].values[0] )
  					AC_MEMCPY( &conn, sl.list[i].values[0], sizeof( conn ) );
  				continue;
  			}
  			if ( flags & SASL_AUXPROP_AUTHZID ) {
  				if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZLEN] )) {
  					if ( sl.list[i].values && sl.list[i].values[0] )
  						AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
  							sizeof( op->o_req_ndn.bv_len ) );
  				} else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHZ] )) {
  					if ( sl.list[i].values )
  						op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
  					break;
  				}
  			}
  
  			if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
  				if ( sl.list[i].values && sl.list[i].values[0] )
  					AC_MEMCPY( &op->o_req_ndn.bv_len, sl.list[i].values[0],
  						sizeof( op->o_req_ndn.bv_len ) );
  			} else if ( !strcmp( sl.list[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
  				if ( sl.list[i].values ) {
  					op->o_req_ndn.bv_val = (char *)sl.list[i].values[0];
  					if ( !(flags & SASL_AUXPROP_AUTHZID) )
  						break;
  				}
  			}
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  			if ( slap_dontUseCopy_propnames != NULL ) {
  				int j;
  				struct berval bv;
  				ber_str2bv( &sl.list[i].name[1], 0, 1, &bv );
  				for ( j = 0; !BER_BVISNULL( &slap_dontUseCopy_propnames[ j ]); j++ ) {
  					if ( bvmatch( &bv, &slap_dontUseCopy_propnames[ j ] ) ) {
  						dontUseCopy = 1;
  						break;
  					}
  				}
  			}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  		}
  	}
  
  	/* Now see what else needs to be fetched */
  	for( i = 0; sl.list[i].name; i++ ) {
  		const char *name = sl.list[i].name;
  
  		if ( name[0] == '*' ) {
  			if ( flags & SASL_AUXPROP_AUTHZID ) continue;
  			/* Skip our private properties */
  			if ( !strcmp( name, slap_propnames[0] )) {
  				i += SLAP_SASL_PROP_COUNT - 1;
  				continue;
  			}
  			name++;
  		} else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
  			continue;
  
  		if ( sl.list[i].values ) {
  			if ( !(flags & SASL_AUXPROP_OVERRIDE) ) continue;
  		}
  		doit = 1;
  		break;
  	}
  
  	if (doit) {
  		slap_callback cb = { NULL, sasl_ap_lookup, NULL, NULL };
  
  		cb.sc_private = &sl;
  
  		op->o_bd = select_backend( &op->o_req_ndn, 1 );
  
  		if ( op->o_bd ) {
  			/* For rootdn, see if we can use the rootpw */
  			if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) &&
  				!BER_BVISEMPTY( &op->o_bd->be_rootpw )) {
  				struct berval cbv = BER_BVNULL;
  
  				/* If there's a recognized scheme, see if it's CLEARTEXT */
  				if ( lutil_passwd_scheme( op->o_bd->be_rootpw.bv_val )) {
  					if ( !strncasecmp( op->o_bd->be_rootpw.bv_val,
  						sc_cleartext.bv_val, sc_cleartext.bv_len )) {
  
  						/* If it's CLEARTEXT, skip past scheme spec */
  						cbv.bv_len = op->o_bd->be_rootpw.bv_len -
  							sc_cleartext.bv_len;
  						if ( cbv.bv_len ) {
  							cbv.bv_val = op->o_bd->be_rootpw.bv_val +
  								sc_cleartext.bv_len;
  						}
  					}
  				/* No scheme, use the whole value */
  				} else {
  					cbv = op->o_bd->be_rootpw;
  				}
  				if ( !BER_BVISEMPTY( &cbv )) {
  					for( i = 0; sl.list[i].name; i++ ) {
  						const char *name = sl.list[i].name;
  
  						if ( name[0] == '*' ) {
  							if ( flags & SASL_AUXPROP_AUTHZID ) continue;
  								name++;
  						} else if ( !(flags & SASL_AUXPROP_AUTHZID ) )
  							continue;
  
  						if ( !strcasecmp(name,"userPassword") ) {
  							sl.sparams->utils->prop_set( sl.sparams->propctx,
  								sl.list[i].name, cbv.bv_val, cbv.bv_len );
  							break;
  						}
  					}
  				}
  			}
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  			if ( SLAP_SHADOW( op->o_bd ) && dontUseCopy ) {
  				dontUseCopy_bd = op->o_bd;
  				op->o_bd = frontendDB;
  			}
  
  retry_dontUseCopy:;
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  			if ( op->o_bd->be_search ) {
  				SlapReply rs = {REP_RESULT};
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  				LDAPControl **save_ctrls = NULL, c;
  				int save_dontUseCopy;
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  				op->o_hdr = conn->c_sasl_bindop->o_hdr;
  				op->o_controls = opbuf.ob_controls;
  				op->o_tag = LDAP_REQ_SEARCH;
  				op->o_dn = conn->c_ndn;
  				op->o_ndn = conn->c_ndn;
  				op->o_callback = &cb;
  				slap_op_time( &op->o_time, &op->o_tincr );
  				op->o_do_not_cache = 1;
  				op->o_is_auth_check = 1;
  				op->o_req_dn = op->o_req_ndn;
  				op->ors_scope = LDAP_SCOPE_BASE;
  				op->ors_deref = LDAP_DEREF_NEVER;
  				op->ors_tlimit = SLAP_NO_LIMIT;
  				op->ors_slimit = 1;
  				op->ors_filter = &generic_filter;
  				op->ors_filterstr = generic_filterstr;
  				op->o_authz = conn->c_authz;
  				/* FIXME: we want all attributes, right? */
  				op->ors_attrs = NULL;
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  				if ( dontUseCopy ) {
  					save_dontUseCopy = op->o_dontUseCopy;
  					if ( !op->o_dontUseCopy ) {
  						int cnt = 0;
  						save_ctrls = op->o_ctrls;
  						if ( op->o_ctrls ) {
  							for ( ; op->o_ctrls[ cnt ]; cnt++ )
  								;
  						}
  						op->o_ctrls = op->o_tmpcalloc( sizeof(LDAPControl *), cnt + 2, op->o_tmpmemctx );
  						if ( cnt ) {
  							for ( cnt = 0; save_ctrls[ cnt ]; cnt++ ) {
  								op->o_ctrls[ cnt ] = save_ctrls[ cnt ];
  							}
  						}
  						c.ldctl_oid = LDAP_CONTROL_DONTUSECOPY;
  						c.ldctl_iscritical = 1;
  						BER_BVZERO( &c.ldctl_value );
  						op->o_ctrls[ cnt ] = &c;
  					}
  					op->o_dontUseCopy = SLAP_CONTROL_CRITICAL;
  				}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  				rc = op->o_bd->be_search( op, &rs );
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  				if ( dontUseCopy ) {
  					if ( save_ctrls != op->o_ctrls ) {
  						op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
  						op->o_ctrls = save_ctrls;
  						op->o_dontUseCopy = save_dontUseCopy;
  					}
  
  					if ( rs.sr_err == LDAP_UNAVAILABLE && slap_dontUseCopy_ignore )
  					{
  						op->o_bd = dontUseCopy_bd;
  						dontUseCopy = 0;
  						goto retry_dontUseCopy;
  					}
  				}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  			}
  		}
  	}
  #if SASL_VERSION_FULL >= 0x020118
  	return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
  #endif
  }
  
  #if SASL_VERSION_FULL >= 0x020110
  static int
  slap_auxprop_store(
  	void *glob_context,
  	sasl_server_params_t *sparams,
  	struct propctx *prctx,
  	const char *user,
  	unsigned ulen)
  {
  	Operation op = {0};
  	Opheader oph;
  	int rc, i;
  	unsigned j;
  	Connection *conn = NULL;
  	const struct propval *pr;
  	Modifications *modlist = NULL, **modtail = &modlist, *mod;
  	slap_callback cb = { NULL, slap_null_cb, NULL, NULL };
  	char textbuf[SLAP_TEXT_BUFLEN];
  	const char *text;
  	size_t textlen = sizeof(textbuf);
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  	int dontUseCopy = 0;
  	BackendDB *dontUseCopy_bd = NULL;
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  	/* just checking if we are enabled */
  	if (!prctx) return SASL_OK;
  
  	if (!sparams || !user) return SASL_BADPARAM;
  
  	pr = sparams->utils->prop_get( sparams->propctx );
  
  	/* Find our DN and conn first */
  	for( i = 0; pr[i].name; i++ ) {
  		if ( pr[i].name[0] == '*' ) {
  			if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_CONN] ) ) {
  				if ( pr[i].values && pr[i].values[0] )
  					AC_MEMCPY( &conn, pr[i].values[0], sizeof( conn ) );
  				continue;
  			}
  			if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHCLEN] )) {
  				if ( pr[i].values && pr[i].values[0] )
  					AC_MEMCPY( &op.o_req_ndn.bv_len, pr[i].values[0],
  						sizeof( op.o_req_ndn.bv_len ) );
  			} else if ( !strcmp( pr[i].name, slap_propnames[SLAP_SASL_PROP_AUTHC] ) ) {
  				if ( pr[i].values )
  					op.o_req_ndn.bv_val = (char *)pr[i].values[0];
  			}
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  			if ( slap_dontUseCopy_propnames != NULL ) {
  				struct berval bv;
  				ber_str2bv( &pr[i].name[1], 0, 1, &bv );
  				for ( j = 0; !BER_BVISNULL( &slap_dontUseCopy_propnames[ j ] ); j++ ) {
  					if ( bvmatch( &bv, &slap_dontUseCopy_propnames[ j ] ) ) {
  						dontUseCopy = 1;
  						break;
  					}
  				}
  			}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  		}
  	}
  	if (!conn || !op.o_req_ndn.bv_val) return SASL_BADPARAM;
  
  	op.o_bd = select_backend( &op.o_req_ndn, 1 );
  
  	if ( !op.o_bd || !op.o_bd->be_modify ) return SASL_FAIL;
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  	if ( SLAP_SHADOW( op.o_bd ) && dontUseCopy ) {
  		dontUseCopy_bd = op.o_bd;
  		op.o_bd = frontendDB;
  		op.o_dontUseCopy = SLAP_CONTROL_CRITICAL;
  	}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  
  	pr = sparams->utils->prop_get( prctx );
  	if (!pr) return SASL_BADPARAM;
  
  	for (i=0; pr[i].name; i++);
  	if (!i) return SASL_BADPARAM;
  
  	for (i=0; pr[i].name; i++) {
  		mod = (Modifications *)ch_malloc( sizeof(Modifications) );
  		mod->sml_op = LDAP_MOD_REPLACE;
  		mod->sml_flags = 0;
  		ber_str2bv( pr[i].name, 0, 0, &mod->sml_type );
  		mod->sml_numvals = pr[i].nvalues;
  		mod->sml_values = (struct berval *)ch_malloc( (pr[i].nvalues + 1) *
  			sizeof(struct berval));
  		for (j=0; j<pr[i].nvalues; j++) {
  			ber_str2bv( pr[i].values[j], 0, 1, &mod->sml_values[j]);
  		}
  		BER_BVZERO( &mod->sml_values[j] );
  		mod->sml_nvalues = NULL;
  		mod->sml_desc = NULL;
  		*modtail = mod;
  		modtail = &mod->sml_next;
  	}
  	*modtail = NULL;
  
  	rc = slap_mods_check( &op, modlist, &text, textbuf, textlen, NULL );
  
  	if ( rc == LDAP_SUCCESS ) {
  		rc = slap_mods_no_user_mod_check( &op, modlist,
  			&text, textbuf, textlen );
  
  		if ( rc == LDAP_SUCCESS ) {
  			if ( conn->c_sasl_bindop ) {
  				op.o_hdr = conn->c_sasl_bindop->o_hdr;
  			} else {
  				op.o_hdr = &oph;
  				memset( &oph, 0, sizeof(oph) );
  				operation_fake_init( conn, &op, ldap_pvt_thread_pool_context(), 0 );
  			}
  			op.o_tag = LDAP_REQ_MODIFY;
  			op.o_ndn = op.o_req_ndn;
  			op.o_callback = &cb;
  			slap_op_time( &op.o_time, &op.o_tincr );
  			op.o_do_not_cache = 1;
  			op.o_is_auth_check = 1;
  			op.o_req_dn = op.o_req_ndn;
  			op.orm_modlist = modlist;
  
  			for (;;) {
  				SlapReply rs = {REP_RESULT};
  				rc = op.o_bd->be_modify( &op, &rs );
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  				if ( dontUseCopy &&
  					rs.sr_err == LDAP_UNAVAILABLE &&
  					slap_dontUseCopy_ignore )
  				{
  					op.o_bd = dontUseCopy_bd;
  					op.o_dontUseCopy = SLAP_CONTROL_NONE;
  					dontUseCopy = 0;
  					continue;
  				}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  				break;
  			}
  		}
  	}
  	slap_mods_free( modlist, 1 );
  	return rc != LDAP_SUCCESS ? SASL_FAIL : SASL_OK;
  }
  #endif /* SASL_VERSION_FULL >= 2.1.16 */
  
  static sasl_auxprop_plug_t slap_auxprop_plugin = {
  	0,	/* Features */
  	0,	/* spare */
  	NULL,	/* glob_context */
  	NULL,	/* auxprop_free */
  	slap_auxprop_lookup,
  	"slapd",	/* name */
  #if SASL_VERSION_FULL >= 0x020110
  	slap_auxprop_store	/* the declaration of this member changed
  				 * in cyrus SASL from 2.1.15 to 2.1.16 */
  #else
  	NULL
  #endif
  };
  
  static int
  slap_auxprop_init(
  	const sasl_utils_t *utils,
  	int max_version,
  	int *out_version,
  	sasl_auxprop_plug_t **plug,
  	const char *plugname)
  {
  	if ( !out_version || !plug ) return SASL_BADPARAM;
  
  	if ( max_version < SASL_AUXPROP_PLUG_VERSION ) return SASL_BADVERS;
  
  	*out_version = SASL_AUXPROP_PLUG_VERSION;
  	*plug = &slap_auxprop_plugin;
  	return SASL_OK;
  }
  
  /* Convert a SASL authcid or authzid into a DN. Store the DN in an
   * auxiliary property, so that we can refer to it in sasl_authorize
   * without interfering with anything else. Also, the SASL username
   * buffer is constrained to 256 characters, and our DNs could be
   * much longer (SLAP_LDAPDN_MAXLEN, currently set to 8192)
   */
  static int
  slap_sasl_canonicalize(
  	sasl_conn_t *sconn,
  	void *context,
  	const char *in,
  	unsigned inlen,
  	unsigned flags,
  	const char *user_realm,
  	char *out,
  	unsigned out_max,
  	unsigned *out_len)
  {
  	Connection *conn = (Connection *)context;
  	struct propctx *props = sasl_auxprop_getctx( sconn );
  	struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
  	struct berval dn;
  	int rc, which;
  	const char *names[2];
  	struct berval	bvin;
  
  	*out_len = 0;
  
  	Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
  		conn ? (long) conn->c_connid : -1L,
  		(flags & SASL_CU_AUTHID) ? "authcid" : "authzid",
  		in ? in : "<empty>");
  
  	/* If name is too big, just truncate. We don't care, we're
  	 * using DNs, not the usernames.
  	 */
  	if ( inlen > out_max )
  		inlen = out_max-1;
  
  	/* This is a Simple Bind using SPASSWD. That means the in-directory
  	 * userPassword of the Binding user already points at SASL, so it
  	 * cannot be used to actually satisfy a password comparison. Just
  	 * ignore it, some other mech will process it.
  	 */
  	if ( !conn->c_sasl_bindop ||
  		conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) goto done;
  
  	/* See if we need to add request, can only do it once */
  	prop_getnames( props, slap_propnames, auxvals );
  	if ( !auxvals[0].name )
  		prop_request( props, slap_propnames );
  
  	if ( flags & SASL_CU_AUTHID )
  		which = SLAP_SASL_PROP_AUTHCLEN;
  	else
  		which = SLAP_SASL_PROP_AUTHZLEN;
  
  	/* Need to store the Connection for auxprop_lookup */
  	if ( !auxvals[SLAP_SASL_PROP_CONN].values ) {
  		names[0] = slap_propnames[SLAP_SASL_PROP_CONN];
  		names[1] = NULL;
  		prop_set( props, names[0], (char *)&conn, sizeof( conn ) );
  	}
  		
  	/* Already been here? */
  	if ( auxvals[which].values )
  		goto done;
  
  	/* Normally we require an authzID to have a u: or dn: prefix.
  	 * However, SASL frequently gives us an authzID that is just
  	 * an exact copy of the authcID, without a prefix. We need to
  	 * detect and allow this condition. If SASL calls canonicalize
  	 * with SASL_CU_AUTHID|SASL_CU_AUTHZID this is a no-brainer.
  	 * But if it's broken into two calls, we need to remember the
  	 * authcID so that we can compare the authzID later. We store
  	 * the authcID temporarily in conn->c_sasl_dn. We necessarily
  	 * finish Canonicalizing before Authorizing, so there is no
  	 * conflict with slap_sasl_authorize's use of this temp var.
  	 *
  	 * The SASL EXTERNAL mech is backwards from all the other mechs,
  	 * it does authzID before the authcID. If we see that authzID
  	 * has already been done, don't do anything special with authcID.
  	 */
  	if ( flags == SASL_CU_AUTHID && !auxvals[SLAP_SASL_PROP_AUTHZ].values ) {
  		conn->c_sasl_dn.bv_val = (char *) in;
  		conn->c_sasl_dn.bv_len = 0;
  	} else if ( flags == SASL_CU_AUTHZID && conn->c_sasl_dn.bv_val ) {
  		rc = strcmp( in, conn->c_sasl_dn.bv_val );
  		conn->c_sasl_dn.bv_val = NULL;
  		/* They were equal, no work needed */
  		if ( !rc ) goto done;
  	}
  
  	bvin.bv_val = (char *)in;
  	bvin.bv_len = inlen;
  	rc = slap_sasl_getdn( conn, NULL, &bvin, (char *)user_realm, &dn,
  		(flags & SASL_CU_AUTHID) ? SLAP_GETDN_AUTHCID : SLAP_GETDN_AUTHZID );
  	if ( rc != LDAP_SUCCESS ) {
  		sasl_seterror( sconn, 0, ldap_err2string( rc ) );
  		return SASL_NOAUTHZ;
  	}
  
  	names[0] = slap_propnames[which];
  	names[1] = NULL;
  	prop_set( props, names[0], (char *)&dn.bv_len, sizeof( dn.bv_len ) );
  
  	which++;
  	names[0] = slap_propnames[which];
  	prop_set( props, names[0], dn.bv_val, dn.bv_len );
  
  	Debug( LDAP_DEBUG_ARGS, "SASL Canonicalize [conn=%ld]: %s=\"%s\"\n",
  		conn ? (long) conn->c_connid : -1L, names[0]+1,
  		dn.bv_val ? dn.bv_val : "<EMPTY>" );
  
  	/* Not needed any more, SASL has copied it */
  	if ( conn && conn->c_sasl_bindop )
  		conn->c_sasl_bindop->o_tmpfree( dn.bv_val, conn->c_sasl_bindop->o_tmpmemctx );
  
  done:
  	AC_MEMCPY( out, in, inlen );
  	out[inlen] = '\0';
  
  	*out_len = inlen;
  
  	return SASL_OK;
  }
  
  static int
  slap_sasl_authorize(
  	sasl_conn_t *sconn,
  	void *context,
  	char *requested_user,
  	unsigned rlen,
  	char *auth_identity,
  	unsigned alen,
  	const char *def_realm,
  	unsigned urlen,
  	struct propctx *props)
  {
  	Connection *conn = (Connection *)context;
  	/* actually:
  	 *	(SLAP_SASL_PROP_COUNT - 1)	because we skip "conn",
  	 *	+ 1				for NULL termination?
  	 */
  	struct propval auxvals[ SLAP_SASL_PROP_COUNT ] = { { 0 } };
  	struct berval authcDN, authzDN = BER_BVNULL;
  	int rc;
  
  	/* Simple Binds don't support proxy authorization, ignore it */
  	if ( !conn->c_sasl_bindop ||
  		conn->c_sasl_bindop->orb_method != LDAP_AUTH_SASL ) return SASL_OK;
  
  	Debug( LDAP_DEBUG_ARGS, "SASL proxy authorize [conn=%ld]: "
  		"authcid=\"%s\" authzid=\"%s\"\n",
  		conn ? (long) conn->c_connid : -1L, auth_identity, requested_user );
  	if ( conn->c_sasl_dn.bv_val ) {
  		BER_BVZERO( &conn->c_sasl_dn );
  	}
  
  	/* Skip SLAP_SASL_PROP_CONN */
  	prop_getnames( props, slap_propnames+1, auxvals );
  	
  	/* Should not happen */
  	if ( !auxvals[0].values ) {
  		sasl_seterror( sconn, 0, "invalid authcid" );
  		return SASL_NOAUTHZ;
  	}
  
  	AC_MEMCPY( &authcDN.bv_len, auxvals[0].values[0], sizeof(authcDN.bv_len) );
  	authcDN.bv_val = auxvals[1].values ? (char *)auxvals[1].values[0] : NULL;
  	conn->c_sasl_dn = authcDN;
  
  	/* Nothing to do if no authzID was given */
  	if ( !auxvals[2].name || !auxvals[2].values ) {
  		goto ok;
  	}
  	
  	AC_MEMCPY( &authzDN.bv_len, auxvals[2].values[0], sizeof(authzDN.bv_len) );
  	authzDN.bv_val = auxvals[3].values ? (char *)auxvals[3].values[0] : NULL;
  
  	rc = slap_sasl_authorized( conn->c_sasl_bindop, &authcDN, &authzDN );
  	if ( rc != LDAP_SUCCESS ) {
  		Debug( LDAP_DEBUG_TRACE, "SASL Proxy Authorize [conn=%ld]: "
  			"proxy authorization disallowed (%d)\n",
  			conn ? (long) conn->c_connid : -1L, rc, 0 );
  
  		sasl_seterror( sconn, 0, "not authorized" );
  		return SASL_NOAUTHZ;
  	}
  
  	/* FIXME: we need yet another dup because slap_sasl_getdn()
  	 * is using the bind operation slab */
  	ber_dupbv( &conn->c_sasl_authz_dn, &authzDN );
  
  ok:
  	if (conn->c_sasl_bindop) {
  		Statslog( LDAP_DEBUG_STATS,
  			"%s BIND authcid=\"%s\" authzid=\"%s\"\n",
  			conn->c_sasl_bindop->o_log_prefix, 
  			auth_identity, requested_user, 0, 0 );
  	}
  
  	Debug( LDAP_DEBUG_TRACE, "SASL Authorize [conn=%ld]: "
  		" proxy authorization allowed authzDN=\"%s\"\n",
  		conn ? (long) conn->c_connid : -1L, 
  		authzDN.bv_val ? authzDN.bv_val : "", 0 );
  	return SASL_OK;
  } 
  
  static int
  slap_sasl_err2ldap( int saslerr )
  {
  	int rc;
  
  	/* map SASL errors to LDAP resultCode returned by:
  	 *	sasl_server_new()
  	 *		SASL_OK, SASL_NOMEM
  	 *	sasl_server_step()
  	 *		SASL_OK, SASL_CONTINUE, SASL_TRANS, SASL_BADPARAM, SASL_BADPROT,
  	 *      ...
  	 *	sasl_server_start()
  	 *      + SASL_NOMECH
  	 *	sasl_setprop()
  	 *		SASL_OK, SASL_BADPARAM
  	 */
  
  	switch (saslerr) {
  		case SASL_OK:
  			rc = LDAP_SUCCESS;
  			break;
  		case SASL_CONTINUE:
  			rc = LDAP_SASL_BIND_IN_PROGRESS;
  			break;
  		case SASL_FAIL:
  		case SASL_NOMEM:
  			rc = LDAP_OTHER;
  			break;
  		case SASL_NOMECH:
  			rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
  			break;
  		case SASL_BADAUTH:
  		case SASL_NOUSER:
  		case SASL_TRANS:
  		case SASL_EXPIRED:
  			rc = LDAP_INVALID_CREDENTIALS;
  			break;
  		case SASL_NOAUTHZ:
  			rc = LDAP_INSUFFICIENT_ACCESS;
  			break;
  		case SASL_TOOWEAK:
  		case SASL_ENCRYPT:
  			rc = LDAP_INAPPROPRIATE_AUTH;
  			break;
  		case SASL_UNAVAIL:
  		case SASL_TRYAGAIN:
  			rc = LDAP_UNAVAILABLE;
  			break;
  		case SASL_DISABLED:
  			rc = LDAP_UNWILLING_TO_PERFORM;
  			break;
  		default:
  			rc = LDAP_OTHER;
  			break;
  	}
  
  	return rc;
  }
  
  #ifdef SLAPD_SPASSWD
  
  static struct berval sasl_pwscheme = BER_BVC("{SASL}");
  
  static int chk_sasl(
  	const struct berval *sc,
  	const struct berval * passwd,
  	const struct berval * cred,
  	const char **text )
  {
  	unsigned int i;
  	int rtn;
  	void *ctx, *sconn = NULL;
  
  	for( i=0; i<cred->bv_len; i++) {
  		if(cred->bv_val[i] == '\0') {
  			return LUTIL_PASSWD_ERR;	/* NUL character in password */
  		}
  	}
  
  	if( cred->bv_val[i] != '\0' ) {
  		return LUTIL_PASSWD_ERR;	/* cred must behave like a string */
  	}
  
  	for( i=0; i<passwd->bv_len; i++) {
  		if(passwd->bv_val[i] == '\0') {
  			return LUTIL_PASSWD_ERR;	/* NUL character in password */
  		}
  	}
  
  	if( passwd->bv_val[i] != '\0' ) {
  		return LUTIL_PASSWD_ERR;	/* passwd must behave like a string */
  	}
  
  	rtn = LUTIL_PASSWD_ERR;
  
  	ctx = ldap_pvt_thread_pool_context();
  	ldap_pvt_thread_pool_getkey( ctx, (void *)slap_sasl_bind, &sconn, NULL );
  
  	if( sconn != NULL ) {
  		int sc;
  		sc = sasl_checkpass( sconn,
  			passwd->bv_val, passwd->bv_len,
  			cred->bv_val, cred->bv_len );
  		rtn = ( sc != SASL_OK ) ? LUTIL_PASSWD_ERR : LUTIL_PASSWD_OK;
  	}
  
  	return rtn;
  }
  #endif /* SLAPD_SPASSWD */
  
  #endif /* HAVE_CYRUS_SASL */
  
  #ifdef ENABLE_REWRITE
  
  typedef struct slapd_map_data {
  	struct berval base;
  	struct berval filter;
  	AttributeName attrs[2];
  	int scope;
  } slapd_map_data;
  
  static void *
  slapd_rw_config( const char *fname, int lineno, int argc, char **argv )
  {
  	slapd_map_data *ret = NULL;
  	LDAPURLDesc *lud = NULL;
  	char *uri;
  	AttributeDescription *ad = NULL;
  	int rc, flen = 0;
  	struct berval dn, ndn;
  
  	if ( argc != 1 ) {
  		Debug( LDAP_DEBUG_ANY,
  			"[%s:%d] slapd map needs URI\n",
  			fname, lineno, 0 );
          return NULL;
  	}
  
  	uri = argv[0];
  	if ( strncasecmp( uri, "uri=", STRLENOF( "uri=" ) ) == 0 ) {
  		uri += STRLENOF( "uri=" );
  	}
  
  	if ( ldap_url_parse( uri, &lud ) != LDAP_URL_SUCCESS ) {
  		Debug( LDAP_DEBUG_ANY,
  			"[%s:%d] illegal URI '%s'\n",
  			fname, lineno, uri );
          return NULL;
  	}
  
  	if ( strcasecmp( lud->lud_scheme, "ldap" )) {
  		Debug( LDAP_DEBUG_ANY,
  			"[%s:%d] illegal URI scheme '%s'\n",
  			fname, lineno, lud->lud_scheme );
  		goto done;
  	}
  
  	if (( lud->lud_host && lud->lud_host[0] ) || lud->lud_exts
  		|| !lud->lud_dn ) {
  		Debug( LDAP_DEBUG_ANY,
  			"[%s:%d] illegal URI '%s'\n",
  			fname, lineno, uri );
  		goto done;
  	}
  
  	if ( lud->lud_attrs ) {
  		if ( lud->lud_attrs[1] ) {
  			Debug( LDAP_DEBUG_ANY,
  				"[%s:%d] only one attribute allowed in URI\n",
  				fname, lineno, 0 );
  			goto done;
  		}
  		if ( strcasecmp( lud->lud_attrs[0], "dn" ) &&
  			strcasecmp( lud->lud_attrs[0], "entryDN" )) {
  			const char *text;
  			rc = slap_str2ad( lud->lud_attrs[0], &ad, &text );
  			if ( rc )
  				goto done;
  		}
  	}
  	ber_str2bv( lud->lud_dn, 0, 0, &dn );
  	if ( dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ))
  		goto done;
  
  	if ( lud->lud_filter ) {
  		flen = strlen( lud->lud_filter ) + 1;
  	}
  	ret = ch_malloc( sizeof( slapd_map_data ) + flen );
  	ret->base = ndn;
  	if ( flen ) {
  		ret->filter.bv_val = (char *)(ret+1);
  		ret->filter.bv_len = flen - 1;
  		strcpy( ret->filter.bv_val, lud->lud_filter );
  	} else {
  		BER_BVZERO( &ret->filter );
  	}
  	ret->scope = lud->lud_scope;
  	if ( ad ) {
  		ret->attrs[0].an_name = ad->ad_cname;
  	} else {
  		BER_BVZERO( &ret->attrs[0].an_name );
  	}
  	ret->attrs[0].an_desc = ad;
  	BER_BVZERO( &ret->attrs[1].an_name );
  done:
  	ldap_free_urldesc( lud );
  	return ret;
  }
  
  struct slapd_rw_info {
  	slapd_map_data *si_data;
  	struct berval si_val;
  };
  
  static int
  slapd_rw_cb( Operation *op, SlapReply *rs )
  {
  	if ( rs->sr_type == REP_SEARCH ) {
  		struct slapd_rw_info *si = op->o_callback->sc_private;
  
  		if ( si->si_data->attrs[0].an_desc ) {
  			Attribute *a;
  
  			a = attr_find( rs->sr_entry->e_attrs,
  				si->si_data->attrs[0].an_desc );
  			if ( a ) {
  				ber_dupbv( &si->si_val, a->a_vals );
  			}
  		} else {
  			ber_dupbv( &si->si_val, &rs->sr_entry->e_name );
  		}
  	}
  	return LDAP_SUCCESS;
  }
  
  static int
  slapd_rw_apply( void *private, const char *filter, struct berval *val )
  {
  	slapd_map_data *sl = private;
  	slap_callback cb = { NULL };
  	Connection conn = {0};
  	OperationBuffer opbuf;
  	Operation *op;
  	void *thrctx;
  	SlapReply rs = {REP_RESULT};
  	struct slapd_rw_info si;
  	char *ptr;
  	int rc;
  
  	thrctx = ldap_pvt_thread_pool_context();
  	connection_fake_init2( &conn, &opbuf, thrctx, 0 );
  	op = &opbuf.ob_op;
  
  	op->o_tag = LDAP_REQ_SEARCH;
  	op->o_req_dn = op->o_req_ndn = sl->base;
  	op->o_bd = select_backend( &op->o_req_ndn, 1 );
  	if ( !op->o_bd ) {
  		return REWRITE_ERR;
  	}
  	si.si_data = sl;
  	BER_BVZERO( &si.si_val );
  	op->ors_scope = sl->scope;
  	op->ors_deref = LDAP_DEREF_NEVER;
  	op->ors_slimit = 1;
  	op->ors_tlimit = SLAP_NO_LIMIT;
  	if ( sl->attrs[0].an_desc ) {
  		op->ors_attrs = sl->attrs;
  	} else {
  		op->ors_attrs = slap_anlist_no_attrs;
  	}
  	if ( filter ) {
  		rc = strlen( filter );
  	} else {
  		rc = 0;
  	}
  	rc += sl->filter.bv_len;
  	ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( rc + 1, op->o_tmpmemctx );
  	if ( sl->filter.bv_len ) {
  		ptr = lutil_strcopy( ptr, sl->filter.bv_val );
  	} else {
  		*ptr = '\0';
  	}
  	if ( filter ) {
  		strcpy( ptr, filter );
  	}
  	op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
  	if ( !op->ors_filter ) {
  		op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
  		return REWRITE_ERR;
  	}
  
  	op->ors_attrsonly = 0;
  	op->o_dn = op->o_bd->be_rootdn;
  	op->o_ndn = op->o_bd->be_rootndn;
  	op->o_do_not_cache = 1;
  
  	cb.sc_response = slapd_rw_cb;
  	cb.sc_private = &si;
  	op->o_callback = &cb;
  
  	rc = op->o_bd->be_search( op, &rs );
  	if ( rc == LDAP_SUCCESS && !BER_BVISNULL( &si.si_val )) {
  		*val = si.si_val;
  		rc = REWRITE_SUCCESS;
  	} else {
  		if ( !BER_BVISNULL( &si.si_val )) {
  			ch_free( si.si_val.bv_val );
  		}
  		rc = REWRITE_ERR;
  	}
  	filter_free_x( op, op->ors_filter, 1 );
  	op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
  	return rc;
  }
  
  static int
  slapd_rw_destroy( void *private )
  {
  	slapd_map_data *md = private;
  
  	assert( private != NULL );
  
  	ch_free( md->base.bv_val );
  	ch_free( md );
  
  	return 0;
  }
  
  static const rewrite_mapper slapd_mapper = {
  	"slapd",
  	slapd_rw_config,
  	slapd_rw_apply,
  	slapd_rw_destroy
  };
  #endif
  
  int slap_sasl_init( void )
  {
  #ifdef HAVE_CYRUS_SASL
  	int rc;
  	static sasl_callback_t server_callbacks[] = {
  		{ SASL_CB_LOG, &slap_sasl_log, NULL },
  		{ SASL_CB_GETOPT, &slap_sasl_getopt, NULL },
  		{ SASL_CB_LIST_END, NULL, NULL }
  	};
  #endif
  
  #ifdef ENABLE_REWRITE
  	rewrite_mapper_register( &slapd_mapper );
  #endif
  
  #ifdef HAVE_CYRUS_SASL
  #ifdef HAVE_SASL_VERSION
  	/* stringify the version number, sasl.h doesn't do it for us */
  #define	VSTR0(maj, min, pat)	#maj "." #min "." #pat
  #define	VSTR(maj, min, pat)	VSTR0(maj, min, pat)
  #define	SASL_VERSION_STRING	VSTR(SASL_VERSION_MAJOR, SASL_VERSION_MINOR, \
  				SASL_VERSION_STEP)
  
  	sasl_version( NULL, &rc );
  	if ( ((rc >> 16) != ((SASL_VERSION_MAJOR << 8)|SASL_VERSION_MINOR)) ||
  		(rc & 0xffff) < SASL_VERSION_STEP)
  	{
  		char version[sizeof("xxx.xxx.xxxxx")];
  		sprintf( version, "%u.%d.%d", (unsigned)rc >> 24, (rc >> 16) & 0xff,
  			rc & 0xffff );
  		Debug( LDAP_DEBUG_ANY, "slap_sasl_init: SASL library version mismatch:"
  			" expected %s, got %s\n",
  			SASL_VERSION_STRING, version, 0 );
  		return -1;
  	}
  #endif
  
  	sasl_set_mutex(
  		ldap_pvt_sasl_mutex_new,
  		ldap_pvt_sasl_mutex_lock,
  		ldap_pvt_sasl_mutex_unlock,
  		ldap_pvt_sasl_mutex_dispose );
  
  	generic_filter.f_desc = slap_schema.si_ad_objectClass;
  
  	rc = sasl_auxprop_add_plugin( "slapd", slap_auxprop_init );
  	if( rc != SASL_OK ) {
  		Debug( LDAP_DEBUG_ANY, "slap_sasl_init: auxprop add plugin failed\n",
  			0, 0, 0 );
  		return -1;
  	}
  
  	/* should provide callbacks for logging */
  	/* server name should be configurable */
  	rc = sasl_server_init( server_callbacks, "slapd" );
  
  	if( rc != SASL_OK ) {
  		Debug( LDAP_DEBUG_ANY, "slap_sasl_init: server init failed\n",
  			0, 0, 0 );
  
  		return -1;
  	}
  
  #ifdef SLAPD_SPASSWD
  	lutil_passwd_add( &sasl_pwscheme, chk_sasl, NULL );
  #endif
  
  	Debug( LDAP_DEBUG_TRACE, "slap_sasl_init: initialized!\n",
  		0, 0, 0 );
  
  	/* default security properties */
  	memset( &sasl_secprops, '\0', sizeof(sasl_secprops) );
  	sasl_secprops.max_ssf = INT_MAX;
  	sasl_secprops.maxbufsize = 65536;
  	sasl_secprops.security_flags = SASL_SEC_NOPLAINTEXT|SASL_SEC_NOANONYMOUS;
  #endif
  
  	return 0;
  }
  
  int slap_sasl_destroy( void )
  {
  #ifdef HAVE_CYRUS_SASL
  	sasl_done();
  
  #ifdef SLAP_AUXPROP_DONTUSECOPY
  	if ( slap_dontUseCopy_propnames ) {
  		ber_bvarray_free( slap_dontUseCopy_propnames );
  		slap_dontUseCopy_propnames = NULL;
  	}
  #endif /* SLAP_AUXPROP_DONTUSECOPY */
  #endif
  	free( sasl_host );
  	sasl_host = NULL;
  
  	return 0;
  }
  
  static char *
  slap_sasl_peer2ipport( struct berval *peer )
  {
  	int		isv6 = 0;
  	char		*ipport, *p,
  			*addr = &peer->bv_val[ STRLENOF( "IP=" ) ];
  	ber_len_t	plen = peer->bv_len - STRLENOF( "IP=" );
  
  	/* IPv6? */
  	if ( addr[0] == '[' ) {
  		isv6 = 1;
  		plen--;
  	}
  	ipport = ch_strdup( &addr[isv6] );
  
  	/* Convert IPv6/IPv4 addresses to address;port syntax. */
  	p = strrchr( ipport, ':' );
  	if ( p != NULL ) {
  		*p = ';';
  		if ( isv6 ) {
  			assert( p[-1] == ']' );
  			AC_MEMCPY( &p[-1], p, plen - ( p - ipport ) + 1 );
  		}
  
  	} else if ( isv6 ) {
  		/* trim ']' */
  		plen--;
  		assert( addr[plen] == ']' );
  		addr[plen] = '\0';
  	}
  
  	return ipport;
  }
  
  int slap_sasl_open( Connection *conn, int reopen )
  {
  	int sc = LDAP_SUCCESS;
  #ifdef HAVE_CYRUS_SASL
  	int cb;
  
  	sasl_conn_t *ctx = NULL;
  	sasl_callback_t *session_callbacks;
  	char *ipremoteport = NULL, *iplocalport = NULL;
  
  	assert( conn->c_sasl_authctx == NULL );
  
  	if ( !reopen ) {
  		assert( conn->c_sasl_extra == NULL );
  
  		session_callbacks =
  			SLAP_CALLOC( 5, sizeof(sasl_callback_t));
  		if( session_callbacks == NULL ) {
  			Debug( LDAP_DEBUG_ANY, 
  				"slap_sasl_open: SLAP_MALLOC failed", 0, 0, 0 );
  			return -1;
  		}
  		conn->c_sasl_extra = session_callbacks;
  
  		session_callbacks[cb=0].id = SASL_CB_LOG;
  		session_callbacks[cb].proc = &slap_sasl_log;
  		session_callbacks[cb++].context = conn;
  
  		session_callbacks[cb].id = SASL_CB_PROXY_POLICY;
  		session_callbacks[cb].proc = &slap_sasl_authorize;
  		session_callbacks[cb++].context = conn;
  
  		session_callbacks[cb].id = SASL_CB_CANON_USER;
  		session_callbacks[cb].proc = &slap_sasl_canonicalize;
  		session_callbacks[cb++].context = conn;
  
  		session_callbacks[cb].id = SASL_CB_LIST_END;
  		session_callbacks[cb].proc = NULL;
  		session_callbacks[cb++].context = NULL;
  	} else {
  		session_callbacks = conn->c_sasl_extra;
  	}
  
  	conn->c_sasl_layers = 0;
  
  	/* create new SASL context */
  	if ( conn->c_sock_name.bv_len != 0 &&
  		strncmp( conn->c_sock_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
  	{
  		iplocalport = slap_sasl_peer2ipport( &conn->c_sock_name );
  	}
  
  	if ( conn->c_peer_name.bv_len != 0 &&
  		strncmp( conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
  	{
  		ipremoteport = slap_sasl_peer2ipport( &conn->c_peer_name );
  	}
  
  	sc = sasl_server_new( "ldap", sasl_host, global_realm,
  		iplocalport, ipremoteport, session_callbacks, SASL_SUCCESS_DATA, &ctx );
  	if ( iplocalport != NULL ) {
  		ch_free( iplocalport );
  	}
  	if ( ipremoteport != NULL ) {
  		ch_free( ipremoteport );
  	}
  
  	if( sc != SASL_OK ) {
  		Debug( LDAP_DEBUG_ANY, "sasl_server_new failed: %d\n",
  			sc, 0, 0 );
  
  		return -1;
  	}
  
  	conn->c_sasl_authctx = ctx;
  
  	if( sc == SASL_OK ) {
  		sc = sasl_setprop( ctx,
  			SASL_SEC_PROPS, &sasl_secprops );
  
  		if( sc != SASL_OK ) {
  			Debug( LDAP_DEBUG_ANY, "sasl_setprop failed: %d\n",
  				sc, 0, 0 );
  
  			slap_sasl_close( conn );
  			return -1;
  		}
  	}
  
  	sc = slap_sasl_err2ldap( sc );
  
  #elif defined(SLAP_BUILTIN_SASL)
  	/* built-in SASL implementation */
  	SASL_CTX *ctx = (SASL_CTX *) SLAP_MALLOC(sizeof(SASL_CTX));
  	if( ctx == NULL ) return -1;
  
  	ctx->sc_external_ssf = 0;
  	BER_BVZERO( &ctx->sc_external_id );
  
  	conn->c_sasl_authctx = ctx;
  #endif
  
  	return sc;
  }
  
  int slap_sasl_external(
  	Connection *conn,
  	slap_ssf_t ssf,
  	struct berval *auth_id )
  {
  #ifdef HAVE_CYRUS_SASL
  	int sc;
  	sasl_conn_t *ctx = conn->c_sasl_authctx;
  	sasl_ssf_t sasl_ssf = ssf;
  
  	if ( ctx == NULL ) {
  		return LDAP_UNAVAILABLE;
  	}
  
  	sc = sasl_setprop( ctx, SASL_SSF_EXTERNAL, &sasl_ssf );
  
  	if ( sc != SASL_OK ) {
  		return LDAP_OTHER;
  	}
  
  	sc = sasl_setprop( ctx, SASL_AUTH_EXTERNAL,
  		auth_id ? auth_id->bv_val : NULL );
  
  	if ( sc != SASL_OK ) {
  		return LDAP_OTHER;
  	}
  #elif defined(SLAP_BUILTIN_SASL)
  	/* built-in SASL implementation */
  	SASL_CTX *ctx = conn->c_sasl_authctx;
  	if ( ctx == NULL ) return LDAP_UNAVAILABLE;
  
  	ctx->sc_external_ssf = ssf;
  	if( auth_id ) {
  		ctx->sc_external_id = *auth_id;
  		BER_BVZERO( auth_id );
  	} else {
  		BER_BVZERO( &ctx->sc_external_id );
  	}
  #endif
  
  	return LDAP_SUCCESS;
  }
  
  int slap_sasl_cbinding( Connection *conn, struct berval *cbv )
  {
  #ifdef SASL_CHANNEL_BINDING
  	sasl_channel_binding_t *cb = ch_malloc( sizeof(*cb) + cbv->bv_len );;
  	cb->name = "ldap";
  	cb->critical = 0;
  	cb->data = (char *)(cb+1);
  	cb->len = cbv->bv_len;
  	memcpy( cb->data, cbv->bv_val, cbv->bv_len );
  	sasl_setprop( conn->c_sasl_authctx, SASL_CHANNEL_BINDING, cb );
  	conn->c_sasl_cbind = cb;
  #endif
  	return LDAP_SUCCESS;
  }
  
  int slap_sasl_reset( Connection *conn )
  {
  	return LDAP_SUCCESS;
  }
  
  char ** slap_sasl_mechs( Connection *conn )
  {
  	char **mechs = NULL;
  
  #ifdef HAVE_CYRUS_SASL
  	sasl_conn_t *ctx = conn->c_sasl_authctx;
  
  	if( ctx == NULL ) ctx = conn->c_sasl_sockctx;
  
  	if( ctx != NULL ) {
  		int sc;
  		SASL_CONST char *mechstr;
  
  		sc = sasl_listmech( ctx,
  			NULL, NULL, ",", NULL,
  			&mechstr, NULL, NULL );
  
  		if( sc != SASL_OK ) {
  			Debug( LDAP_DEBUG_ANY, "slap_sasl_listmech failed: %d\n",
  				sc, 0, 0 );
  
  			return NULL;
  		}
  
  		mechs = ldap_str2charray( mechstr, "," );
  	}
  #elif defined(SLAP_BUILTIN_SASL)
  	/* builtin SASL implementation */
  	SASL_CTX *ctx = conn->c_sasl_authctx;
  	if ( ctx != NULL && ctx->sc_external_id.bv_val ) {
  		/* should check ssf */
  		mechs = ldap_str2charray( "EXTERNAL", "," );
  	}
  #endif
  
  	return mechs;
  }
  
  int slap_sasl_close( Connection *conn )
  {
  #ifdef HAVE_CYRUS_SASL
  	sasl_conn_t *ctx = conn->c_sasl_authctx;
  
  	if( ctx != NULL ) {
  		sasl_dispose( &ctx );
  	}
  	if ( conn->c_sasl_sockctx &&
  		conn->c_sasl_authctx != conn->c_sasl_sockctx )
  	{
  		ctx = conn->c_sasl_sockctx;
  		sasl_dispose( &ctx );
  	}
  
  	conn->c_sasl_authctx = NULL;
  	conn->c_sasl_sockctx = NULL;
  	conn->c_sasl_done = 0;
  
  	free( conn->c_sasl_extra );
  	conn->c_sasl_extra = NULL;
  
  	free( conn->c_sasl_cbind );
  	conn->c_sasl_cbind = NULL;
  
  #elif defined(SLAP_BUILTIN_SASL)
  	SASL_CTX *ctx = conn->c_sasl_authctx;
  	if( ctx ) {
  		if( ctx->sc_external_id.bv_val ) {
  			free( ctx->sc_external_id.bv_val );
  			BER_BVZERO( &ctx->sc_external_id );
  		}
  		free( ctx );
  		conn->c_sasl_authctx = NULL;
  	}
  #endif
  
  	return LDAP_SUCCESS;
  }
  
  int slap_sasl_bind( Operation *op, SlapReply *rs )
  {
  #ifdef HAVE_CYRUS_SASL
  	sasl_conn_t *ctx = op->o_conn->c_sasl_authctx;
  	struct berval response;
  	unsigned reslen = 0;
  	int sc;
  
  	Debug(LDAP_DEBUG_ARGS,
  		"==> sasl_bind: dn=\"%s\" mech=%s datalen=%ld\n",
  		op->o_req_dn.bv_len ? op->o_req_dn.bv_val : "",
  		op->o_conn->c_sasl_bind_in_progress ? "<continuing>" : 
  		op->o_conn->c_sasl_bind_mech.bv_val,
  		op->orb_cred.bv_len );
  
  	if( ctx == NULL ) {
  		send_ldap_error( op, rs, LDAP_UNAVAILABLE,
  			"SASL unavailable on this session" );
  		return rs->sr_err;
  	}
  
  #define	START( ctx, mech, cred, clen, resp, rlen, err ) \
  	sasl_server_start( ctx, mech, cred, clen, resp, rlen )
  #define	STEP( ctx, cred, clen, resp, rlen, err ) \
  	sasl_server_step( ctx, cred, clen, resp, rlen )
  
  	if ( !op->o_conn->c_sasl_bind_in_progress ) {
  		/* If we already authenticated once, must use a new context */
  		if ( op->o_conn->c_sasl_done ) {
  			sasl_ssf_t ssf = 0;
  			const char *authid = NULL;
  			sasl_getprop( ctx, SASL_SSF_EXTERNAL, (void *)&ssf );
  			sasl_getprop( ctx, SASL_AUTH_EXTERNAL, (void *)&authid );
  			if ( authid ) authid = ch_strdup( authid );
  			if ( ctx != op->o_conn->c_sasl_sockctx ) {
  				sasl_dispose( &ctx );
  			}
  			op->o_conn->c_sasl_authctx = NULL;
  				
  			slap_sasl_open( op->o_conn, 1 );
  			ctx = op->o_conn->c_sasl_authctx;
  			if ( authid ) {
  				sasl_setprop( ctx, SASL_SSF_EXTERNAL, &ssf );
  				sasl_setprop( ctx, SASL_AUTH_EXTERNAL, authid );
  				ch_free( (char *)authid );
  			}
  		}
  		sc = START( ctx,
  			op->o_conn->c_sasl_bind_mech.bv_val,
  			op->orb_cred.bv_val, op->orb_cred.bv_len,
  			(SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
  
  	} else {
  		sc = STEP( ctx,
  			op->orb_cred.bv_val, op->orb_cred.bv_len,
  			(SASL_CONST char **)&response.bv_val, &reslen, &rs->sr_text );
  	}
  
  	response.bv_len = reslen;
  
  	if ( sc == SASL_OK ) {
  		sasl_ssf_t *ssf = NULL;
  
  		ber_dupbv_x( &op->orb_edn, &op->o_conn->c_sasl_dn, op->o_tmpmemctx );
  		BER_BVZERO( &op->o_conn->c_sasl_dn );
  		op->o_conn->c_sasl_done = 1;
  
  		rs->sr_err = LDAP_SUCCESS;
  
  		(void) sasl_getprop( ctx, SASL_SSF, (void *)&ssf );
  		op->orb_ssf = ssf ? *ssf : 0;
  
  		ctx = NULL;
  		if( op->orb_ssf ) {
  			ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  			op->o_conn->c_sasl_layers++;
  
  			/* If there's an old layer, set sockctx to NULL to
  			 * tell connection_read() to wait for us to finish.
  			 * Otherwise there is a race condition: we have to
  			 * send the Bind response using the old security
  			 * context and then remove it before reading any
  			 * new messages.
  			 */
  			if ( op->o_conn->c_sasl_sockctx ) {
  				ctx = op->o_conn->c_sasl_sockctx;
  				op->o_conn->c_sasl_sockctx = NULL;
  			} else {
  				op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
  			}
  			ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  		}
  
  		/* Must send response using old security layer */
  		rs->sr_sasldata = (response.bv_len ? &response : NULL);
  		send_ldap_sasl( op, rs );
  		
  		/* Now dispose of the old security layer.
  		 */
  		if ( ctx ) {
  			ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
  			ldap_pvt_sasl_remove( op->o_conn->c_sb );
  			op->o_conn->c_sasl_sockctx = op->o_conn->c_sasl_authctx;
  			ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
  			sasl_dispose( &ctx );
  		}
  	} else if ( sc == SASL_CONTINUE ) {
  		rs->sr_err = LDAP_SASL_BIND_IN_PROGRESS,
  		rs->sr_text = sasl_errdetail( ctx );
  		rs->sr_sasldata = &response;
  		send_ldap_sasl( op, rs );
  
  	} else {
  		BER_BVZERO( &op->o_conn->c_sasl_dn );
  		rs->sr_text = sasl_errdetail( ctx );
  		rs->sr_err = slap_sasl_err2ldap( sc ),
  		send_ldap_result( op, rs );
  	}
  
  	Debug(LDAP_DEBUG_TRACE, "<== slap_sasl_bind: rc=%d\n", rs->sr_err, 0, 0);
  
  #elif defined(SLAP_BUILTIN_SASL)
  	/* built-in SASL implementation */
  	SASL_CTX *ctx = op->o_conn->c_sasl_authctx;
  
  	if ( ctx == NULL ) {
  		send_ldap_error( op, rs, LDAP_OTHER,
  			"Internal SASL Error" );
  
  	} else if ( bvmatch( &ext_bv, &op->o_conn->c_sasl_bind_mech ) ) {
  		/* EXTERNAL */
  
  		if( op->orb_cred.bv_len ) {
  			rs->sr_text = "proxy authorization not supported";
  			rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
  			send_ldap_result( op, rs );
  
  		} else {
  			op->orb_edn = ctx->sc_external_id;
  			rs->sr_err = LDAP_SUCCESS;
  			rs->sr_sasldata = NULL;
  			send_ldap_sasl( op, rs );
  		}
  
  	} else {
  		send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
  			"requested SASL mechanism not supported" );
  	}
  #else
  	send_ldap_error( op, rs, LDAP_AUTH_METHOD_NOT_SUPPORTED,
  		"SASL not supported" );
  #endif
  
  	return rs->sr_err;
  }
  
  char* slap_sasl_secprops( const char *in )
  {
  #ifdef HAVE_CYRUS_SASL
  	int rc = ldap_pvt_sasl_secprops( in, &sasl_secprops );
  
  	return rc == LDAP_SUCCESS ? NULL : "Invalid security properties";
  #else
  	return "SASL not supported";
  #endif
  }
  
  void slap_sasl_secprops_unparse( struct berval *bv )
  {
  #ifdef HAVE_CYRUS_SASL
  	ldap_pvt_sasl_secprops_unparse( &sasl_secprops, bv );
  #endif
  }
  
  #ifdef HAVE_CYRUS_SASL
  int
  slap_sasl_setpass( Operation *op, SlapReply *rs )
  {
  	struct berval id = BER_BVNULL;	/* needs to come from connection */
  	struct berval new = BER_BVNULL;
  	struct berval old = BER_BVNULL;
  
  	assert( ber_bvcmp( &slap_EXOP_MODIFY_PASSWD, &op->ore_reqoid ) == 0 );
  
  	rs->sr_err = sasl_getprop( op->o_conn->c_sasl_authctx, SASL_USERNAME,
  		(SASL_CONST void **)(char *)&id.bv_val );
  
  	if( rs->sr_err != SASL_OK ) {
  		rs->sr_text = "unable to retrieve SASL username";
  		rs->sr_err = LDAP_OTHER;
  		goto done;
  	}
  
  	Debug( LDAP_DEBUG_ARGS, "==> slap_sasl_setpass: \"%s\"\n",
  		id.bv_val ? id.bv_val : "", 0, 0 );
  
  	rs->sr_err = slap_passwd_parse( op->ore_reqdata,
  		NULL, &old, &new, &rs->sr_text );
  
  	if( rs->sr_err != LDAP_SUCCESS ) {
  		goto done;
  	}
  
  	if( new.bv_len == 0 ) {
  		slap_passwd_generate(&new);
  
  		if( new.bv_len == 0 ) {
  			rs->sr_text = "password generation failed.";
  			rs->sr_err = LDAP_OTHER;
  			goto done;
  		}
  		
  		rs->sr_rspdata = slap_passwd_return( &new );
  	}
  
  	rs->sr_err = sasl_setpass( op->o_conn->c_sasl_authctx, id.bv_val,
  		new.bv_val, new.bv_len, old.bv_val, old.bv_len, 0 );
  	if( rs->sr_err != SASL_OK ) {
  		rs->sr_text = sasl_errdetail( op->o_conn->c_sasl_authctx );
  	}
  	switch(rs->sr_err) {
  		case SASL_OK:
  			rs->sr_err = LDAP_SUCCESS;
  			break;
  
  		case SASL_NOCHANGE:
  		case SASL_NOMECH:
  		case SASL_DISABLED:
  		case SASL_PWLOCK:
  		case SASL_FAIL:
  		case SASL_BADPARAM:
  		default:
  			rs->sr_err = LDAP_OTHER;
  	}
  
  done:
  	return rs->sr_err;
  }
  #endif /* HAVE_CYRUS_SASL */
  
  /* Take any sort of identity string and return a DN with the "dn:" prefix. The
   * string returned in *dn is in its own allocated memory, and must be free'd 
   * by the calling process.  -Mark Adamson, Carnegie Mellon
   *
   * The "dn:" prefix is no longer used anywhere inside slapd. It is only used
   * on strings passed in directly from SASL.  -Howard Chu, Symas Corp.
   */
  
  #define SET_NONE	0
  #define	SET_DN		1
  #define	SET_U		2
  
  int slap_sasl_getdn( Connection *conn, Operation *op, struct berval *id,
  	char *user_realm, struct berval *dn, int flags )
  {
  	int rc, is_dn = SET_NONE, do_norm = 1;
  	struct berval dn2, *mech;
  
  	assert( conn != NULL );
  	assert( id != NULL );
  
  	Debug( LDAP_DEBUG_ARGS, "slap_sasl_getdn: conn %lu id=%s [len=%lu]\n", 
  		conn->c_connid,
  		BER_BVISNULL( id ) ? "NULL" : ( BER_BVISEMPTY( id ) ? "<empty>" : id->bv_val ),
  		BER_BVISNULL( id ) ? 0 : ( BER_BVISEMPTY( id ) ? 0 :
  		                           (unsigned long) id->bv_len ) );
  
  	if ( !op ) {
  		op = conn->c_sasl_bindop;
  	}
  	assert( op != NULL );
  
  	BER_BVZERO( dn );
  
  	if ( !BER_BVISNULL( id ) ) {
  		/* Blatantly anonymous ID */
  		static struct berval bv_anonymous = BER_BVC( "anonymous" );
  
  		if ( ber_bvstrcasecmp( id, &bv_anonymous ) == 0 ) {
  			return( LDAP_SUCCESS );
  		}
  
  	} else {
  		/* FIXME: if empty, should we stop? */
  		BER_BVSTR( id, "" );
  	}
  
  	if ( !BER_BVISEMPTY( &conn->c_sasl_bind_mech ) ) {
  		mech = &conn->c_sasl_bind_mech;
  	} else {
  		mech = &conn->c_authmech;
  	}
  
  	/* An authcID needs to be converted to authzID form. Set the
  	 * values directly into *dn; they will be normalized later. (and
  	 * normalizing always makes a new copy.) An ID from a TLS certificate
  	 * is already normalized, so copy it and skip normalization.
  	 */
  	if( flags & SLAP_GETDN_AUTHCID ) {
  		if( bvmatch( mech, &ext_bv )) {
  			/* EXTERNAL DNs are already normalized */
  			assert( !BER_BVISNULL( id ) );
  
  			do_norm = 0;
  			is_dn = SET_DN;
  			ber_dupbv_x( dn, id, op->o_tmpmemctx );
  
  		} else {
  			/* convert to u:<username> form */
  			is_dn = SET_U;
  			*dn = *id;
  		}
  	}
  
  	if( is_dn == SET_NONE ) {
  		if( !strncasecmp( id->bv_val, "u:", STRLENOF( "u:" ) ) ) {
  			is_dn = SET_U;
  			dn->bv_val = id->bv_val + STRLENOF( "u:" );
  			dn->bv_len = id->bv_len - STRLENOF( "u:" );
  
  		} else if ( !strncasecmp( id->bv_val, "dn:", STRLENOF( "dn:" ) ) ) {
  			is_dn = SET_DN;
  			dn->bv_val = id->bv_val + STRLENOF( "dn:" );
  			dn->bv_len = id->bv_len - STRLENOF( "dn:" );
  		}
  	}
  
  	/* No other possibilities from here */
  	if( is_dn == SET_NONE ) {
  		BER_BVZERO( dn );
  		return( LDAP_INAPPROPRIATE_AUTH );
  	}
  
  	/* Username strings */
  	if( is_dn == SET_U ) {
  		/* ITS#3419: values may need escape */
  		LDAPRDN		DN[ 5 ];
  		LDAPAVA 	*RDNs[ 4 ][ 2 ];
  		LDAPAVA 	AVAs[ 4 ];
  		int		irdn;
  
  		irdn = 0;
  		DN[ irdn ] = RDNs[ irdn ];
  		RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
  		AVAs[ irdn ].la_attr = slap_schema.si_ad_uid->ad_cname;
  		AVAs[ irdn ].la_value = *dn;
  		AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
  		AVAs[ irdn ].la_private = NULL;
  		RDNs[ irdn ][ 1 ] = NULL;
  
  		if ( user_realm && *user_realm ) {
  			irdn++;
  			DN[ irdn ] = RDNs[ irdn ];
  			RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
  			AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
  			ber_str2bv( user_realm, 0, 0, &AVAs[ irdn ].la_value );
  			AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
  			AVAs[ irdn ].la_private = NULL;
  			RDNs[ irdn ][ 1 ] = NULL;
  		}
  
  		if ( !BER_BVISNULL( mech ) ) {
  			irdn++;
  			DN[ irdn ] = RDNs[ irdn ];
  			RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
  			AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
  			AVAs[ irdn ].la_value = *mech;
  			AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
  			AVAs[ irdn ].la_private = NULL;
  			RDNs[ irdn ][ 1 ] = NULL;
  		}
  
  		irdn++;
  		DN[ irdn ] = RDNs[ irdn ];
  		RDNs[ irdn ][ 0 ] = &AVAs[ irdn ];
  		AVAs[ irdn ].la_attr = slap_schema.si_ad_cn->ad_cname;
  		BER_BVSTR( &AVAs[ irdn ].la_value, "auth" );
  		AVAs[ irdn ].la_flags = LDAP_AVA_NULL;
  		AVAs[ irdn ].la_private = NULL;
  		RDNs[ irdn ][ 1 ] = NULL;
  
  		irdn++;
  		DN[ irdn ] = NULL;
  
  		rc = ldap_dn2bv_x( DN, dn, LDAP_DN_FORMAT_LDAPV3,
  				op->o_tmpmemctx );
  		if ( rc != LDAP_SUCCESS ) {
  			BER_BVZERO( dn );
  			return rc;
  		}
  
  		Debug( LDAP_DEBUG_TRACE,
  			"slap_sasl_getdn: u:id converted to %s\n",
  			dn->bv_val, 0, 0 );
  
  	} else {
  		
  		/* Dup the DN in any case, so we don't risk 
  		 * leaks or dangling pointers later,
  		 * and the DN value is '\0' terminated */
  		ber_dupbv_x( &dn2, dn, op->o_tmpmemctx );
  		dn->bv_val = dn2.bv_val;
  	}
  
  	/* All strings are in DN form now. Normalize if needed. */
  	if ( do_norm ) {
  		rc = dnNormalize( 0, NULL, NULL, dn, &dn2, op->o_tmpmemctx );
  
  		/* User DNs were constructed above and must be freed now */
  		slap_sl_free( dn->bv_val, op->o_tmpmemctx );
  
  		if ( rc != LDAP_SUCCESS ) {
  			BER_BVZERO( dn );
  			return rc;
  		}
  		*dn = dn2;
  	}
  
  	/* Run thru regexp */
  	slap_sasl2dn( op, dn, &dn2, flags );
  	if( !BER_BVISNULL( &dn2 ) ) {
  		slap_sl_free( dn->bv_val, op->o_tmpmemctx );
  		*dn = dn2;
  		Debug( LDAP_DEBUG_TRACE,
  			"slap_sasl_getdn: dn:id converted to %s\n",
  			dn->bv_val, 0, 0 );
  	}
  
  	return( LDAP_SUCCESS );
  }
  