/* bind.c - decode an ldap bind operation and pass it to a backend db */
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2002 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 "ldap_pvt.h"
+#include "slap.h"
-void
+int
do_bind(
Connection *conn,
Operation *op
)
{
- BerElement *ber = op->o_ber;
- int version, method, len, rc;
- char *dn;
- struct berval cred;
- Backend *be;
+ BerElement *ber = op->o_ber;
+ ber_int_t version;
+ ber_tag_t method;
+ struct berval mech = { 0, NULL };
+ struct berval dn = { 0, NULL };
+ struct berval pdn = { 0, NULL };
+ struct berval ndn = { 0, NULL };
+ struct berval edn = { 0, NULL };
+ ber_tag_t tag;
+ int rc = LDAP_SUCCESS;
+ const char *text;
+ struct berval cred = { 0, NULL };
+ Backend *be;
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
+ "do_bind: conn %d\n", conn->c_connid ));
+#else
Debug( LDAP_DEBUG_TRACE, "do_bind\n", 0, 0, 0 );
+#endif
+
+ /*
+ * Force to connection to "anonymous" until bind succeeds.
+ */
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ connection2anonymous( conn );
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+ if ( op->o_dn.bv_val != NULL ) {
+ free( op->o_dn.bv_val );
+ op->o_dn.bv_val = ch_strdup( "" );
+ op->o_dn.bv_len = 0;
+ }
+
+ if ( op->o_ndn.bv_val != NULL ) {
+ free( op->o_ndn.bv_val );
+ op->o_ndn.bv_val = ch_strdup( "" );
+ op->o_ndn.bv_len = 0;
+ }
/*
* 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, "{imt" /*}*/, &version, &dn, &method );
+
+ if ( tag == LBER_ERROR ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
+ "do_bind: conn %d ber_scanf failed\n", conn->c_connid ));
+#else
+ Debug( LDAP_DEBUG_ANY, "bind: ber_scanf failed\n", 0, 0, 0 );
+#endif
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR, "decoding error" );
+ rc = -1;
+ goto cleanup;
+ }
+
+ op->o_protocol = version;
+
+ if( method != LDAP_AUTH_SASL ) {
+ tag = ber_scanf( ber, /*{*/ "m}", &cred );
- {
- BerElement tber;
- unsigned long tlen, ttag;
-
- 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, "{o" /*}*/, &mech );
+
+ if ( tag != LBER_ERROR ) {
+ ber_len_t len;
+ tag = ber_peek_tag( ber, &len );
+
+ if ( tag == LDAP_TAG_LDAPCRED ) {
+ tag = ber_scanf( ber, "m", &cred );
+ } else {
+ tag = LDAP_TAG_LDAPCRED;
+ cred.bv_val = NULL;
+ cred.bv_len = 0;
+ }
+
+ if ( tag != LBER_ERROR ) {
+ tag = ber_scanf( ber, /*{{*/ "}}" );
+ }
+ }
+ }
+
+ if ( tag == LBER_ERROR ) {
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR,
+ "decoding error" );
+ rc = SLAPD_DISCONNECT;
+ goto cleanup;
}
+
+ if( (rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d get_ctrls failed\n", conn->c_connid ));
+#else
+ Debug( LDAP_DEBUG_ANY, "do_bind: get_ctrls failed\n", 0, 0, 0 );
+#endif
+ goto cleanup;
+ }
+
+ rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
+ if ( rc != LDAP_SUCCESS ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d invalid dn (%s)\n",
+ conn->c_connid, dn.bv_val ));
+#else
+ Debug( LDAP_DEBUG_ANY, "bind: invalid dn (%s)\n",
+ dn.bv_val, 0, 0 );
+#endif
+ send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
+ "invalid DN", NULL, NULL );
+ goto cleanup;
}
+
+ if( method == LDAP_AUTH_SASL ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+ "do_sasl_bind: conn %d dn (%s) mech %s\n", conn->c_connid,
+ pdn.bv_val, mech.bv_val ));
#else
- rc = ber_scanf( ber, "{iato}", &version, &dn, &method, &cred );
+ Debug( LDAP_DEBUG_TRACE, "do_sasl_bind: dn (%s) mech %s\n",
+ pdn.bv_val, mech.bv_val, NULL );
#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;
+
+ } else {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+ "do_bind: conn %d version=%ld dn=\"%s\" method=%ld\n",
+ conn->c_connid, (unsigned long) version,
+ pdn.bv_val, (unsigned long)method ));
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: version=%ld dn=\"%s\" method=%ld\n",
+ (unsigned long) version,
+ pdn.bv_val, (unsigned long) method );
#endif
- }
}
-#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=%lu op=%lu BIND dn=\"%s\" method=%ld\n",
+ op->o_connid, op->o_opid, pdn.bv_val, (unsigned long) method, 0 );
+
+ if ( version < LDAP_VERSION_MIN || version > LDAP_VERSION_MAX ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d unknown version = %ld\n",
+ conn->c_connid, (unsigned long)version ));
+#else
+ Debug( LDAP_DEBUG_ANY, "do_bind: unknown version=%ld\n",
+ (unsigned long) version, 0, 0 );
+#endif
+ send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
+ NULL, "requested protocol version not supported", NULL, NULL );
+ goto cleanup;
+
+ } else if (!( global_allows & SLAP_ALLOW_BIND_V2 ) &&
+ version < LDAP_VERSION3 )
+ {
+ send_ldap_result( conn, op, rc = LDAP_PROTOCOL_ERROR,
+ NULL, "requested protocol version not allowed", NULL, NULL );
+ goto cleanup;
+ }
+
+ /* we set connection version regardless of whether bind succeeds
+ * or not.
+ */
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ conn->c_protocol = version;
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+ /* check for inappropriate controls */
+ if( get_manageDSAit( op ) == SLAP_CRITICAL_CONTROL ) {
+ send_ldap_result( conn, op,
+ rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION,
+ NULL, "manageDSAit control inappropriate",
+ NULL, NULL );
+ goto cleanup;
+ }
+
+ if ( method == LDAP_AUTH_SASL ) {
+ slap_ssf_t ssf = 0;
+
+ if ( version < LDAP_VERSION3 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d sasl with LDAPv%ld\n",
+ conn->c_connid, (unsigned long)version ));
+#else
+ Debug( LDAP_DEBUG_ANY, "do_bind: sasl with LDAPv%ld\n",
+ (unsigned long) version, 0, 0 );
+#endif
+ send_ldap_disconnect( conn, op,
+ LDAP_PROTOCOL_ERROR, "SASL bind requires LDAPv3" );
+ rc = SLAPD_DISCONNECT;
+ goto cleanup;
+ }
- if ( version != LDAP_VERSION2 ) {
- if ( dn != NULL ) {
- free( dn );
+ if( mech.bv_len == 0 ) {
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d no SASL mechanism provided\n",
+ conn->c_connid ));
+#else
+ Debug( LDAP_DEBUG_ANY,
+ "do_bind: no sasl mechanism provided\n",
+ 0, 0, 0 );
+#endif
+ send_ldap_result( conn, op, rc = LDAP_AUTH_METHOD_NOT_SUPPORTED,
+ NULL, "no SASL mechanism provided", NULL, NULL );
+ goto cleanup;
}
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+
+ /* check restrictions */
+ rc = backend_check_restrictions( NULL, conn, op, mech.bv_val, &text );
+ if( rc != LDAP_SUCCESS ) {
+ send_ldap_result( conn, op, rc,
+ NULL, text, 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;
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ if ( conn->c_sasl_bind_in_progress ) {
+ if((ber_bvcmp(&conn->c_sasl_bind_mech, &mech) != 0)) {
+ /* mechanism changed between bind steps */
+ slap_sasl_reset(conn);
+ }
+ } else {
+ conn->c_sasl_bind_mech = mech;
+ mech.bv_val = NULL;
+ mech.bv_len = 0;
+ }
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+ rc = slap_sasl_bind( conn, op,
+ &pdn, &ndn,
+ &cred, &edn, &ssf );
+
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+ if( rc == LDAP_SUCCESS ) {
+ conn->c_dn = edn;
+ if( edn.bv_len != 0 ) {
+ /* edn is always normalized already */
+ ber_dupbv( &conn->c_ndn, &conn->c_dn );
+ }
+ conn->c_authmech = conn->c_sasl_bind_mech;
+ conn->c_sasl_bind_mech.bv_val = NULL;
+ conn->c_sasl_bind_mech.bv_len = 0;
+ conn->c_sasl_bind_in_progress = 0;
+
+ conn->c_sasl_ssf = ssf;
+ if( ssf > conn->c_ssf ) {
+ conn->c_ssf = ssf;
+ }
+
+ if( conn->c_dn.bv_len != 0 ) {
+ ber_len_t max = sockbuf_max_incoming;
+ ber_sockbuf_ctrl( conn->c_sb,
+ LBER_SB_OPT_SET_MAX_INCOMING, &max );
+ }
+
+ } else if ( rc == LDAP_SASL_BIND_IN_PROGRESS ) {
+ conn->c_sasl_bind_in_progress = 1;
+
+ } else {
+ if ( conn->c_sasl_bind_mech.bv_val ) {
+ free( conn->c_sasl_bind_mech.bv_val );
+ conn->c_sasl_bind_mech.bv_val = NULL;
+ conn->c_sasl_bind_mech.bv_len = 0;
+ }
+ conn->c_sasl_bind_in_progress = 0;
+ }
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
+
+ goto cleanup;
+
+ } else {
+ /* Not SASL, cancel any in-progress bind */
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+ if ( conn->c_sasl_bind_mech.bv_val != NULL ) {
+ free(conn->c_sasl_bind_mech.bv_val);
+ conn->c_sasl_bind_mech.bv_val = NULL;
+ conn->c_sasl_bind_mech.bv_len = 0;
+ }
+ conn->c_sasl_bind_in_progress = 0;
+
+ slap_sasl_reset( conn );
+ ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
}
- Debug( LDAP_DEBUG_TRACE, "do_bind: version %d dn (%s) method %d\n",
- version, dn, method );
+ if ( method == LDAP_AUTH_SIMPLE ) {
+ /* accept "anonymous" binds */
+ if ( cred.bv_len == 0 || ndn.bv_len == 0 ) {
+ rc = LDAP_SUCCESS;
+ text = NULL;
+
+ if( cred.bv_len &&
+ !( global_allows & SLAP_ALLOW_BIND_ANON_CRED ))
+ {
+ /* cred is not empty, disallow */
+ rc = LDAP_INVALID_CREDENTIALS;
+
+ } else if ( ndn.bv_len &&
+ !( global_allows & SLAP_ALLOW_BIND_ANON_DN ))
+ {
+ /* DN is not empty, disallow */
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ text = "unwilling to allow anonymous bind with non-empty DN";
+
+ } else if ( global_disallows & SLAP_DISALLOW_BIND_ANON ) {
+ /* disallow */
+ rc = LDAP_INAPPROPRIATE_AUTH;
+ text = "anonymous bind disallowed";
+
+ } else {
+ rc = backend_check_restrictions( NULL, conn, op, mech.bv_val, &text );
+ }
+
+ /*
+ * we already forced connection to "anonymous",
+ * just need to send success
+ */
+ send_ldap_result( conn, op, rc,
+ NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+ "do_bind: conn %d v%d anonymous bind\n",
+ conn->c_connid, version ));
+#else
+ Debug( LDAP_DEBUG_TRACE, "do_bind: v%d anonymous bind\n",
+ version, 0, 0 );
+#endif
+ goto cleanup;
+
+ } else if ( global_disallows & SLAP_DISALLOW_BIND_SIMPLE ) {
+ /* disallow simple authentication */
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ text = "unwilling to perform simple authentication";
- /* accept null binds */
- if ( dn == NULL || *dn == '\0' ) {
- if ( dn != NULL ) {
- free( dn );
+ send_ldap_result( conn, op, rc,
+ NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %d v%d simple bind(%s) disallowed\n",
+ conn->c_connid, version, ndn.bv_val ));
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d simple bind(%s) disallowed\n",
+ version, ndn.bv_val, 0 );
+#endif
+ goto cleanup;
}
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+
+#ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
+ } else if ( method == LDAP_AUTH_KRBV41 || method == LDAP_AUTH_KRBV42 ) {
+ if ( global_disallows & SLAP_DISALLOW_BIND_KRBV4 ) {
+ /* disallow simple authentication */
+ rc = LDAP_UNWILLING_TO_PERFORM;
+ text = "unwilling to perform Kerberos V4 bind";
+
+ send_ldap_result( conn, op, rc,
+ NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+ "do_bind: conn %d v%d Kerberos V4 bind\n",
+ conn->c_connid, version ));
+#else
+ Debug( LDAP_DEBUG_TRACE, "do_bind: v%d Kerberos V4 bind\n",
+ version, 0, 0 );
+#endif
+ goto cleanup;
}
+#endif
+
+ } else {
+ rc = LDAP_AUTH_METHOD_NOT_SUPPORTED;
+ text = "unknown authentication method";
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
- return;
+ send_ldap_result( conn, op, rc,
+ NULL, text, NULL, NULL );
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
+ "do_bind: conn %ld v%d unknown authentication method (%ld)\n",
+ conn->c_connid, version, method ));
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d unknown authentication method (%ld)\n",
+ version, method, 0 );
+#endif
+ 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 ( cred.bv_len == 0 ) {
- send_ldap_result( conn, op, LDAP_SUCCESS, NULL, NULL );
+ if ( (be = select_backend( &ndn, 0, 0 )) == NULL ) {
+ if ( default_referral ) {
+ BerVarray ref = referral_rewrite( default_referral,
+ NULL, &pdn, LDAP_SCOPE_DEFAULT );
+
+ send_ldap_result( conn, op, rc = LDAP_REFERRAL,
+ NULL, NULL, ref ? ref : default_referral, NULL );
+
+ ber_bvarray_free( ref );
+
} else {
- send_ldap_result( conn, op, LDAP_PARTIAL_RESULTS, NULL,
- default_referral );
+ /* noSuchObject is not allowed to be returned by bind */
+ 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 );
+ /* check restrictions */
+ rc = backend_check_restrictions( be, conn, op, NULL, &text );
+ if( rc != LDAP_SUCCESS ) {
+ send_ldap_result( conn, op, rc,
+ NULL, text, NULL, NULL );
+ goto cleanup;
+ }
+
+ conn->c_authz_backend = be;
+
+ if ( be->be_bind ) {
+ int ret;
+
+ /* deref suffix alias if appropriate */
+ suffix_alias( be, &ndn );
+
+ ret = (*be->be_bind)( be, conn, op,
+ &pdn, &ndn, method, &cred, &edn );
+
+ if ( ret == 0 ) {
+ ldap_pvt_thread_mutex_lock( &conn->c_mutex );
+
+ if(edn.bv_len) {
+ conn->c_dn = edn;
+ } else {
+ ber_dupbv( &conn->c_dn, &pdn );
+ }
+ conn->c_cdn = pdn;
+ pdn.bv_val = NULL;
+ pdn.bv_len = 0;
+
+ conn->c_ndn = ndn;
+ ndn.bv_val = NULL;
+ ndn.bv_len = 0;
+
+ if( conn->c_dn.bv_len != 0 ) {
+ ber_len_t max = sockbuf_max_incoming;
+ ber_sockbuf_ctrl( conn->c_sb,
+ LBER_SB_OPT_SET_MAX_INCOMING, &max );
}
- conn->c_dn = strdup( dn );
- pthread_mutex_unlock( &conn->c_dnmutex );
+
+#ifdef NEW_LOGGING
+ LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
+ "do_bind: conn %d v%d bind: \"%s\" to \"%s\" \n",
+ conn->c_connid, version, conn->c_cdn.bv_val, conn->c_dn.bv_val ));
+#else
+ Debug( LDAP_DEBUG_TRACE,
+ "do_bind: v%d bind: \"%s\" to \"%s\"\n",
+ version, conn->c_cdn.bv_val, conn->c_dn.bv_val );
+#endif
+
+ 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.bv_val != NULL) {
+ free( edn.bv_val );
}
+
} 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, "operation not supported within namingContext",
+ NULL, NULL );
}
- free( dn );
- if ( cred.bv_val != NULL ) {
- free( cred.bv_val );
+cleanup:
+ if( pdn.bv_val != NULL ) {
+ free( pdn.bv_val );
}
+ if( ndn.bv_val != NULL ) {
+ free( ndn.bv_val );
+ }
+ if ( mech.bv_val != NULL ) {
+ free( mech.bv_val );
+ }
+
+ return rc;
}
projects / openldap / blobdiff