/* bind.c - decode an ldap bind operation and pass it to a backend db */
+/*
+ * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
/*
* Copyright (c) 1995 Regents of the University of Michigan.
* is provided ``as is'' without express or implied warranty.
*/
+#include "portable.h"
+
#include <stdio.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include "slap.h"
-extern Backend *select_backend();
+#include <ac/string.h>
+#include <ac/socket.h>
-extern char *default_referral;
+#include "slap.h"
-void
+int
do_bind(
Connection *conn,
Operation *op
)
{
BerElement *ber = op->o_ber;
- int version, method, len, rc;
- char *dn;
+ ber_int_t version;
+ ber_tag_t method;
+ char *mech;
+ char *dn, *ndn;
+ ber_tag_t tag;
+ int rc = LDAP_SUCCESS;
struct berval cred;
Backend *be;
Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
+ dn = NULL;
+ ndn = NULL;
+ mech = NULL;
+ cred.bv_val = NULL;
+
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+ /* Force to connection to "anonymous" until bind succeeds.
+ * This may need to be relocated or done on a case by case basis
+ * to handle certain SASL mechanisms.
+ */
+
+ if ( conn->c_cdn != NULL ) {
+ free( conn->c_cdn );
+ conn->c_cdn = NULL;
+ }
+
+ if ( conn->c_dn != NULL ) {
+ free( conn->c_dn );
+ conn->c_dn = NULL;
+ }
+
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+ if ( op->o_dn != NULL ) {
+ free( op->o_dn );
+ op->o_dn = ch_strdup( "" );
+ }
+
+ if ( op->o_ndn != NULL ) {
+ free( op->o_ndn );
+ op->o_ndn = ch_strdup( "" );
+ }
+
/*
* Parse the bind request. It looks like this:
*
* authentication CHOICE {
* simple [0] OCTET STRING -- passwd
* krbv42ldap [1] OCTET STRING
- * krbv42dsa [1] OCTET STRING
+ * krbv42dsa [2] OCTET STRING
+ * SASL [3] SaslCredentials
* }
+ * }
+ *
+ * SaslCredentials ::= SEQUENCE {
+ * mechanism LDAPString,
+ * credentials OCTET STRING OPTIONAL
* }
*/
-#ifdef COMPAT30
- /*
- * in version 3.0 there is an extra SEQUENCE tag after the
- * BindRequest SEQUENCE tag.
- */
+ tag = ber_scanf( ber, "{iat" /*}*/, &version, &dn, &method );
+
+ if ( tag == LBER_ERROR ) {
+ Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR, "decoding error" );
+ rc = -1;
+ goto cleanup;
+ }
+
+ ndn = ch_strdup( dn );
- {
- BerElement tber;
- unsigned long tlen, ttag;
+ if ( dn_normalize_case( ndn ) == NULL ) {
+ Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n", dn, 0, 0 );
+ send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
+ "invalid DN", NULL, NULL );
+ goto cleanup;
+ }
+
+ op->o_protocol = version;
+
+ if( method != LDAP_AUTH_SASL ) {
+ tag = ber_scanf( ber, /*{*/ "o}", &cred );
- tber = *op->o_ber;
- ttag = ber_skip_tag( &tber, &tlen );
- if ( ber_peek_tag( &tber, &tlen ) == LBER_SEQUENCE ) {
- Debug( LDAP_DEBUG_ANY, "version 3.0 detected\n", 0, 0, 0 );
- conn->c_version = 30;
- rc = ber_scanf(ber, "{{iato}}", &version, &dn, &method, &cred);
} else {
- rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
+ tag = ber_scanf( ber, "{a" /*}*/, &mech );
+
+ if ( tag != LBER_ERROR ) {
+ ber_len_t len;
+ tag = ber_peek_tag( ber, &len );
+
+ if ( tag == LDAP_TAG_LDAPCRED ) {
+ tag = ber_scanf( ber, "o", &cred );
+ }
+
+ if ( tag != LBER_ERROR ) {
+ tag = ber_scanf( ber, /*{{*/ "}}" );
+ }
+ }
}
+
+ if ( tag == LBER_ERROR ) {
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR,
+ "decoding error" );
+ rc = -1;
+ goto cleanup;
}
-#else
- rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
-#endif
- if ( rc == LBER_ERROR ) {
- Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
- send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
- "decoding error" );
- return;
- }
-#ifdef COMPAT30
- if ( conn->c_version == 30 ) {
- switch ( method ) {
- case LDAP_AUTH_SIMPLE_30:
- method = LDAP_AUTH_SIMPLE;
- break;
-#ifdef KERBEROS
- case LDAP_AUTH_KRBV41_30:
- method = LDAP_AUTH_KRBV41;
- break;
- case LDAP_AUTH_KRBV42_30:
- method = LDAP_AUTH_KRBV42;
- break;
-#endif
- }
+
+ if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
+ goto cleanup;
+ }
+
+ if( method == LDAP_AUTH_SASL ) {
+ Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
+ dn, mech, NULL );
+ } else {
+ Debug( LDAP_DEBUG_TRACE, "do_bind: version=%ld dn=\"%s\" method=%ld\n",
+ (unsigned long) version, dn, (unsigned long) method );
}
-#endif /* compat30 */
- dn_normalize( dn );
- Statslog( LDAP_DEBUG_STATS, "conn=%d op=%d BIND dn=\"%s\" method=%d\n",
- conn->c_connid, op->o_opid, dn, method, 0 );
+ Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d BIND dn=\"%s\" method=%ld\n",
+ op->o_connid, op->o_opid, ndn, (unsigned long) method, 0 );
+
+ if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
+ (unsigned long) version, 0, 0 );
+ send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
+ NULL, "version not supported", NULL, NULL );
+ goto cleanup;
+ }
- if ( version != LDAP_VERSION2 ) {
- if ( dn != NULL ) {
- free( dn );
+ if ( method == LDAP_AUTH_SASL ) {
+ if ( version < LDAP_VERSION3 ) {
+ Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
+ (unsigned long) version, 0, 0 );
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR, "sasl bind requires LDAPv3" );
+ rc = -1;
+ goto cleanup;
}
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+
+ if( mech == NULL || *mech == '\0' ) {
+ Debug( LDAP_DEBUG_ANY,
+ "do_bind: no sasl mechanism provided\n",
+ 0, 0, 0 );
+ send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ NULL, "no sasl mechanism provided", NULL, NULL );
+ goto cleanup;
}
- Debug( LDAP_DEBUG_ANY, "unknown version %d\n", version, 0, 0 );
- send_ldap_result( conn, op, LDAP_PROTOCOL_ERROR, NULL,
- "version not supported" );
- return;
- }
+ if( !charray_inlist( supportedSASLMechanisms, mech ) ) {
+ Debug( LDAP_DEBUG_ANY,
+ "do_bind: sasl mechanism=\"%s\" not supported.\n",
+ mech, 0, 0 );
+ send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ NULL, "sasl mechanism not supported", NULL, NULL );
+ goto cleanup;
+ }
- Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
- version, dn, method );
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
- /* accept null binds */
- if ( dn == NULL || *dn == '\0' ) {
- if ( dn != NULL ) {
- free( dn );
+ if ( conn->c_authmech != NULL ) {
+ assert( conn->c_bind_in_progress );
+
+ if((strcmp(conn->c_authmech, mech) != 0)) {
+ /* mechanism changed, cancel in progress bind */
+ conn->c_bind_in_progress = 0;
+ if( conn->c_authstate != NULL ) {
+ free(conn->c_authstate);
+ conn->c_authstate = NULL;
+ }
+ free(conn->c_authmech);
+ conn->c_authmech = NULL;
+ }
+
+#ifdef LDAP_DEBUG
+ } else {
+ assert( !conn->c_bind_in_progress );
+ assert( conn->c_authmech == NULL );
+ assert( conn->c_authstate == NULL );
+#endif
}
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+
+ } else {
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+ if ( conn->c_authmech != NULL ) {
+ assert( conn->c_bind_in_progress );
+
+ /* cancel in progress bind */
+ conn->c_bind_in_progress = 0;
+
+ if( conn->c_authstate != NULL ) {
+ free(conn->c_authstate);
+ conn->c_authstate = NULL;
+ }
+ free(conn->c_authmech);
+ conn->c_authmech = NULL;
}
+ }
+
+ conn->c_protocol = version;
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
- return;
+ /* accept null binds */
+ if ( ndn == NULL || *ndn == '\0' ) {
+ /*
+ * we already forced connection to "anonymous", we just
+ * need to send success
+ */
+ send_ldap_result( conn, op, LDAP_SUCCESS,
+ NULL, NULL, NULL, NULL );
+ goto cleanup;
}
/*
* if we don't hold it.
*/
- if ( (be = select_backend( dn )) == NULL ) {
- free( dn );
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
- }
+ if ( (be = select_backend( ndn )) == NULL ) {
if ( cred.bv_len == 0 ) {
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+ send_ldap_result( conn, op, LDAP_SUCCESS,
+ NULL, NULL, NULL, NULL );
+
+ } else if ( default_referral ) {
+ send_ldap_result( conn, op, rc = LDAP_REFERRAL,
+ NULL, NULL, default_referral, NULL );
+
} else {
- send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, NULL,
- default_referral );
+ send_ldap_result( conn, op, rc = LDAP_INVALID_CREDENTIALS,
+ NULL, NULL, NULL, NULL );
}
- return;
+
+ goto cleanup;
}
- if ( be->be_bind != NULL ) {
- if ( (*be->be_bind)( be, conn, op, dn, method, &cred ) == 0 ) {
- pthread_mutex_lock( &conn->c_dnmutex );
- if ( conn->c_dn != NULL ) {
- free( conn->c_dn );
+ if ( be->be_bind ) {
+ /* alias suffix */
+ char *edn;
+
+ /* deref suffix alias if appropriate */
+ ndn = suffix_alias( be, ndn );
+
+ if ( (*be->be_bind)( be, conn, op, ndn, method, mech, &cred, &edn ) == 0 ) {
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+ conn->c_cdn = dn;
+ dn = NULL;
+
+ if(edn != NULL) {
+ conn->c_dn = edn;
+ } else {
+ conn->c_dn = ndn;
+ ndn = NULL;
}
- conn->c_dn = strdup( dn );
- pthread_mutex_unlock( &conn->c_dnmutex );
+
+ Debug( LDAP_DEBUG_TRACE, "do_bind: bound \"%s\" to \"%s\"\n",
+ conn->c_cdn, conn->c_dn, method );
+
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
/* send this here to avoid a race condition */
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+ send_ldap_result( conn, op, LDAP_SUCCESS,
+ NULL, NULL, NULL, NULL );
+
+ } else if (edn != NULL) {
+ free( edn );
}
+
} else {
- send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM, NULL,
- "Function not implemented" );
+ send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
+ NULL, "Function not implemented", NULL, NULL );
}
- free( dn );
+cleanup:
+ if( dn != NULL ) {
+ free( dn );
+ }
+ if( ndn != NULL ) {
+ free( ndn );
+ }
+ if ( mech != NULL ) {
+ free( mech );
+ }
if ( cred.bv_val != NULL ) {
free( cred.bv_val );
}
+
+ return rc;
}
projects / openldap / blobdiff