a85b5759f3
These files were pulled from the 1.6.3 release tarball. This new version builds against OpenSSL version 1.1 which will be the default in the new Debian Stable which is due to be released RealSoonNow (tm).
392 lines
12 KiB
C
392 lines
12 KiB
C
/*
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* util/fptr_wlist.h - function pointer whitelists.
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*
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* Copyright (c) 2007, NLnet Labs. All rights reserved.
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*
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* This software is open source.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of the NLNET LABS nor the names of its contributors may
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* be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \file
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*
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* This file contains functions that check function pointers.
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* The functions contain a whitelist of known good callback values.
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* Any other values lead to an error.
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*
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* This prevent heap overflow based exploits, where the callback pointer
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* is overwritten by a buffer overflow (apart from this defense, buffer
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* overflows should be fixed of course).
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*
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* Function pointers are used in
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* o network code callbacks.
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* o rbtree, lruhash, region data manipulation
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* in lruhash, the assertions are before the critical regions.
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* in other places, assertions are before the callback.
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* o module operations.
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*/
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#ifndef UTIL_FPTR_WLIST_H
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#define UTIL_FPTR_WLIST_H
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#include "util/netevent.h"
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#include "util/storage/lruhash.h"
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#include "util/module.h"
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#include "util/tube.h"
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#include "services/mesh.h"
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/**
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* Macro to perform an assertion check for fptr wlist checks.
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* Does not get disabled in optimize mode. Check adds security by layers.
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*/
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#if defined(EXPORT_ALL_SYMBOLS)
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#define fptr_ok(x) /* nothing, dll-exe memory layout on win disables it */
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#else
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#define fptr_ok(x) \
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do { if(!(x)) \
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fatal_exit("%s:%d: %s: pointer whitelist %s failed", \
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__FILE__, __LINE__, __func__, #x); \
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} while(0);
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#endif
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/**
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* Check function pointer whitelist for comm_point callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_comm_point(comm_point_callback_type *fptr);
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/**
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* Check function pointer whitelist for raw comm_point callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_comm_point_raw(comm_point_callback_type *fptr);
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/**
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* Check function pointer whitelist for comm_timer callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_comm_timer(void (*fptr)(void*));
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/**
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* Check function pointer whitelist for comm_signal callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_comm_signal(void (*fptr)(int, void*));
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/**
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* Check function pointer whitelist for start_accept callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_start_accept(void (*fptr)(void*));
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/**
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* Check function pointer whitelist for stop_accept callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_stop_accept(void (*fptr)(void*));
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/**
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* Check function pointer whitelist for event structure callback values.
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* This is not called by libevent itself, but checked by netevent.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_event(void (*fptr)(int, short, void *));
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/**
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* Check function pointer whitelist for pending udp callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_pending_udp(comm_point_callback_type *fptr);
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/**
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* Check function pointer whitelist for pending tcp callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_pending_tcp(comm_point_callback_type *fptr);
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/**
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* Check function pointer whitelist for serviced query callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_serviced_query(comm_point_callback_type *fptr);
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/**
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* Check function pointer whitelist for rbtree cmp callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_rbtree_cmp(int (*fptr) (const void *, const void *));
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/**
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* Check function pointer whitelist for lruhash sizefunc callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_hash_sizefunc(lruhash_sizefunc_type fptr);
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/**
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* Check function pointer whitelist for lruhash compfunc callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_hash_compfunc(lruhash_compfunc_type fptr);
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/**
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* Check function pointer whitelist for lruhash delkeyfunc callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_hash_delkeyfunc(lruhash_delkeyfunc_type fptr);
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/**
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* Check function pointer whitelist for lruhash deldata callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_hash_deldatafunc(lruhash_deldatafunc_type fptr);
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/**
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* Check function pointer whitelist for lruhash markdel callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_hash_markdelfunc(lruhash_markdelfunc_type fptr);
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/**
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* Check function pointer whitelist for module_env send_query callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_modenv_send_query(struct outbound_entry* (*fptr)(
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struct query_info* qinfo, uint16_t flags, int dnssec, int want_dnssec,
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int nocaps, struct sockaddr_storage* addr, socklen_t addrlen,
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uint8_t* zone, size_t zonelen, int ssl_upstream, struct module_qstate* q));
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/**
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* Check function pointer whitelist for module_env detach_subs callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_modenv_detach_subs(void (*fptr)(
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struct module_qstate* qstate));
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/**
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* Check function pointer whitelist for module_env attach_sub callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_modenv_attach_sub(int (*fptr)(
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struct module_qstate* qstate, struct query_info* qinfo,
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uint16_t qflags, int prime, int valrec, struct module_qstate** newq));
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/**
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* Check function pointer whitelist for module_env kill_sub callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_modenv_kill_sub(void (*fptr)(struct module_qstate* newq));
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/**
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* Check function pointer whitelist for module_env detect_cycle callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_modenv_detect_cycle(int (*fptr)(
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struct module_qstate* qstate, struct query_info* qinfo,
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uint16_t flags, int prime, int valrec));
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/**
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* Check function pointer whitelist for module init call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_init(int (*fptr)(struct module_env* env, int id));
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/**
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* Check function pointer whitelist for module deinit call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_deinit(void (*fptr)(struct module_env* env, int id));
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/**
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* Check function pointer whitelist for module operate call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_operate(void (*fptr)(struct module_qstate* qstate,
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enum module_ev event, int id, struct outbound_entry* outbound));
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/**
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* Check function pointer whitelist for module inform_super call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_inform_super(void (*fptr)(
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struct module_qstate* qstate, int id, struct module_qstate* super));
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/**
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* Check function pointer whitelist for module clear call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_clear(void (*fptr)(struct module_qstate* qstate,
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int id));
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/**
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* Check function pointer whitelist for module get_mem call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mod_get_mem(size_t (*fptr)(struct module_env* env, int id));
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/**
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* Check function pointer whitelist for alloc clear on id overflow call values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_alloc_cleanup(void (*fptr)(void*));
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/**
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* Check function pointer whitelist for tube listen handler values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_tube_listen(tube_callback_type* fptr);
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/**
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* Check function pointer whitelist for mesh state callback values.
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*
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_mesh_cb(mesh_cb_func_type fptr);
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/**
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* Check function pointer whitelist for config_get_option func values.
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_print_func(void (*fptr)(char*,void*));
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/**
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* Check function pointer whitelist for inplace_cb_reply,
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* inplace_cb_reply_cache, inplace_cb_reply_local and inplace_cb_reply_servfail
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* func values.
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* @param fptr: function pointer to check.
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* @param type: the type of the callback function.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_inplace_cb_reply_generic(inplace_cb_reply_func_type* fptr,
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enum inplace_cb_list_type type);
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/**
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* Check function pointer whitelist for inplace_cb_query func values.
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_inplace_cb_query(inplace_cb_query_func_type* fptr);
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/**
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* Check function pointer whitelist for inplace_cb_edns_back_parsed func values.
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_inplace_cb_edns_back_parsed(
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inplace_cb_edns_back_parsed_func_type* fptr);
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/**
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* Check function pointer whitelist for inplace_cb_query_response func values.
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* @param fptr: function pointer to check.
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* @return false if not in whitelist.
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*/
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int fptr_whitelist_inplace_cb_query_response(
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inplace_cb_query_response_func_type* fptr);
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/** Due to module breakage by fptr wlist, these test app declarations
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* are presented here */
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/**
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* compare two order_ids from lock-verify test app
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* @param e1: first order_id
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* @param e2: second order_id
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* @return compare code -1, 0, +1 (like memcmp).
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*/
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int order_lock_cmp(const void* e1, const void* e2);
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/**
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* compare two codeline structs for rbtree from memstats test app
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* @param a: codeline
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* @param b: codeline
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* @return compare code -1, 0, +1 (like memcmp).
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*/
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int codeline_cmp(const void* a, const void* b);
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/** compare two replay_vars */
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int replay_var_compare(const void* a, const void* b);
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#endif /* UTIL_FPTR_WLIST_H */
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