mirror of
https://github.com/NLnetLabs/unbound.git
synced 2025-12-20 23:00:56 -05:00
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
/*
|
|
* validator/validator.h - secure validator DNS query response module
|
|
*
|
|
* Copyright (c) 2007, NLnet Labs. All rights reserved.
|
|
*
|
|
* This software is open source.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* Neither the name of the NLNET LABS nor the names of its contributors may
|
|
* be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
*
|
|
* This file contains a module that performs validation of DNS queries.
|
|
* According to RFC 4034.
|
|
*/
|
|
|
|
#ifndef VALIDATOR_VALIDATOR_H
|
|
#define VALIDATOR_VALIDATOR_H
|
|
struct module_func_block;
|
|
#include "util/data/msgreply.h"
|
|
struct val_anchors;
|
|
|
|
/**
|
|
* Global state for the validator.
|
|
*/
|
|
struct val_env {
|
|
/** trusted key storage */
|
|
struct val_anchors* anchors;
|
|
|
|
/** key cache */
|
|
};
|
|
|
|
/**
|
|
* State of the validator for a query.
|
|
*/
|
|
enum val_state {
|
|
/** initial state for validation */
|
|
VAL_INIT_STATE = 0,
|
|
/** handle response to trust anchor priming query */
|
|
VAL_PRIME_RESP_STATE,
|
|
/** find the proper keys for validation, follow trust chain */
|
|
VAL_FINDKEY_STATE,
|
|
/** handle response to DS query to make trust chain */
|
|
VAL_FINDKEY_DS_RESP_STATE,
|
|
/** handle response to DNSKEY query to make trust chain */
|
|
VAL_FINDKEY_DNSKEY_RESP_STATE,
|
|
/** validate the answer, using found key entry */
|
|
VAL_VALIDATE_STATE,
|
|
/** finish up */
|
|
VAL_FINISHED_STATE
|
|
};
|
|
|
|
/**
|
|
* Per query state for the validator module.
|
|
*/
|
|
struct val_qstate {
|
|
/**
|
|
* State of the validator module.
|
|
*/
|
|
enum val_state state;
|
|
|
|
/**
|
|
* The original message we have been given to validate.
|
|
*/
|
|
struct dns_msg* orig_msg;
|
|
|
|
/**
|
|
* The query name we have chased to; qname after following CNAMEs
|
|
*/
|
|
struct query_info qchase;
|
|
|
|
/**
|
|
* The chased reply, extract from original message. Can be:
|
|
* o CNAME
|
|
* o DNAME + CNAME
|
|
* o answer plus authority, additional (nsecs).
|
|
*/
|
|
struct reply_info* chase_reply;
|
|
};
|
|
|
|
/**
|
|
* Get the validator function block.
|
|
* @return: function block with function pointers to validator methods.
|
|
*/
|
|
struct module_func_block* val_get_funcblock();
|
|
|
|
/**
|
|
* Get validator state as a string
|
|
* @param state: to convert
|
|
* @return constant string that is printable.
|
|
*/
|
|
const char* val_state_to_string(enum val_state state);
|
|
|
|
#endif /* VALIDATOR_VALIDATOR_H */
|