val_anchor.h File Reference

This file contains storage for the trust anchors for the validator. More...

#include "util/rbtree.h"
#include "util/locks.h"

Data Structures
struct	val_anchors
	Trust anchor store. More...
struct	ta_key
	Trust anchor key. More...
struct	trust_anchor
	A trust anchor in the trust anchor store. More...

Functions
struct val_anchors *	anchors_create (void)
	Create trust anchor storage. More...
void	anchors_delete (struct val_anchors *anchors)
	Delete trust anchor storage. More...
int	anchors_apply_cfg (struct val_anchors *anchors, struct config_file *cfg)
	Process trust anchor config. More...
void	anchors_init_parents_locked (struct val_anchors *anchors)
	Recalculate parent pointers. More...
struct trust_anchor *	anchors_lookup (struct val_anchors *anchors, uint8_t *qname, size_t qname_len, uint16_t qclass)
	Given a qname/qclass combination, find the trust anchor closest above it. More...
struct trust_anchor *	anchor_find (struct val_anchors *anchors, uint8_t *name, int namelabs, size_t namelen, uint16_t dclass)
	Find a trust anchor. More...
struct trust_anchor *	anchor_store_str (struct val_anchors *anchors, struct sldns_buffer *buffer, const char *str)
	Store one string as trust anchor RR. More...
size_t	anchors_get_mem (struct val_anchors *anchors)
	Get memory in use by the trust anchor storage. More...
int	anchor_cmp (const void *k1, const void *k2)
	compare two trust anchors
int	anchors_add_insecure (struct val_anchors *anchors, uint16_t c, uint8_t *nm)
	Add insecure point trust anchor. More...
void	anchors_delete_insecure (struct val_anchors *anchors, uint16_t c, uint8_t *nm)
	Delete insecure point trust anchor. More...
size_t	anchor_list_keytags (struct trust_anchor *ta, uint16_t *list, size_t num)
	Get a list of keytags for the trust anchor. More...
int	anchor_has_keytag (struct val_anchors *anchors, uint8_t *name, int namelabs, size_t namelen, uint16_t dclass, uint16_t keytag)
	Check if there is a trust anchor for given zone with this keytag. More...
struct trust_anchor *	anchors_find_any_noninsecure (struct val_anchors *anchors)
	Find an anchor that is not an insecure point, if any, or there are no DNSSEC verification anchors if none. More...

Detailed Description

This file contains storage for the trust anchors for the validator.

Function Documentation

anchors_create()

struct val_anchors* anchors_create

(

void

)

Create trust anchor storage.

Returns

new storage or NULL on error.

References anchor_cmp(), anchors_delete(), val_anchors::autr, autr_global_create(), val_anchors::lock, rbtree_create(), and val_anchors::tree.

Referenced by anchors_test(), and val_apply_cfg().

anchors_delete()

void anchors_delete

(

struct val_anchors *

anchors

)

Delete trust anchor storage.

Parameters

anchors

to delete.

References anchors_delfunc(), val_anchors::autr, autr_global_delete(), val_anchors::lock, traverse_postorder(), and val_anchors::tree.

Referenced by anchors_create(), anchors_test(), and val_deinit().

anchors_apply_cfg()

int anchors_apply_cfg	(	struct val_anchors *	anchors,
		struct config_file *	cfg
	)

Process trust anchor config.

Parameters

anchors	struct anchor storage
cfg	config options.

Returns

0 on error.

References anchor_insert_insecure(), anchor_read_bind_file_wild(), anchor_read_file(), anchor_store_str(), anchors_assemble_rrsets(), as112_zones, config_file::auto_trust_anchor_file_list, autr_debug_print(), autr_read_file(), config_file::chrootdir, config_file::domain_insecure, init_parents(), config_file::insecure_lan_zones, log_err(), config_strlist::next, sldns_buffer_free(), sldns_buffer_new(), config_strlist::str, config_file::trust_anchor_file_list, config_file::trust_anchor_list, config_file::trusted_keys_file_list, VERB_ALGO, and verbosity.

Referenced by val_apply_cfg().

anchors_init_parents_locked()

void anchors_init_parents_locked

(

struct val_anchors *

anchors

)

Recalculate parent pointers.

The caller must hold the lock on the anchors structure (say after removing an item from the rbtree). Caller must not hold any locks on trust anchors. After the call is complete the parent pointers are updated and an item just removed is no longer referenced in parent pointers.

Parameters

anchors

the structure to update.

References trust_anchor::dclass, dname_lab_cmp(), trust_anchor::name, trust_anchor::namelabs, trust_anchor::node, rbnode_type::parent, trust_anchor::parent, RBTREE_FOR, and val_anchors::tree.

Referenced by anchors_add_insecure(), anchors_delete_insecure(), and init_parents().

anchors_lookup()

struct trust_anchor* anchors_lookup	(	struct val_anchors *	anchors,
		uint8_t *	qname,
		size_t	qname_len,
		uint16_t	qclass
	)

Given a qname/qclass combination, find the trust anchor closest above it.

Or return NULL if none exists.

Parameters

anchors	struct anchor storage
qname	query name, uncompressed wireformat.
qname_len	length of qname.
qclass	class to query for.

Returns

the trust anchor or NULL if none is found. The anchor is locked.

References trust_anchor::dclass, dname_count_labels(), dname_lab_cmp(), rbnode_type::key, val_anchors::lock, trust_anchor::lock, trust_anchor::name, trust_anchor::namelabs, trust_anchor::namelen, trust_anchor::node, trust_anchor::parent, rbtree_find_less_equal(), and val_anchors::tree.

Referenced by auth_zone_verify_zonemd(), check_no_anchor(), iter_qname_indicates_dnssec(), test_anchor_empty(), test_anchor_one(), and test_anchors().

anchor_find()

struct trust_anchor* anchor_find	(	struct val_anchors *	anchors,
		uint8_t *	name,
		int	namelabs,
		size_t	namelen,
		uint16_t	dclass
	)

Find a trust anchor.

Exact matching.

Parameters

anchors	anchor storage.
name	name of trust anchor (wireformat)
namelabs	labels in name
namelen	length of name
dclass	class of trust anchor

Returns

NULL if not found. The anchor is locked.

References trust_anchor::dclass, rbnode_type::key, val_anchors::lock, trust_anchor::name, trust_anchor::namelabs, trust_anchor::namelen, trust_anchor::node, rbtree_search(), and val_anchors::tree.

Referenced by anchor_has_keytag(), do_list_forwards(), find_add_tp(), iter_indicates_dnssec(), and process_prime_response().

anchor_store_str()

struct trust_anchor* anchor_store_str	(	struct val_anchors *	anchors,
		struct sldns_buffer *	buffer,
		const char *	str
	)

Store one string as trust anchor RR.

Parameters

anchors	anchor storage.
buffer	parsing buffer, to generate the RR wireformat in.
str	string.

Returns

NULL on error.

Referenced by anchors_apply_cfg(), test_anchor_one(), and test_anchors().

anchors_get_mem()

size_t anchors_get_mem

(

struct val_anchors *

anchors

)

Get memory in use by the trust anchor storage.

Parameters

anchors

anchor storage.

Returns

memory in use in bytes.

References trust_anchor::namelen, RBTREE_FOR, and val_anchors::tree.

anchors_add_insecure()

int anchors_add_insecure	(	struct val_anchors *	anchors,
		uint16_t	c,
		uint8_t *	nm
	)

Add insecure point trust anchor.

For external use (locks and init_parents)

Parameters

anchors	anchor storage.
c	class.
nm	name of insecure trust point.

Returns

false on alloc failure.

References anchor_new_ta(), anchors_init_parents_locked(), trust_anchor::dclass, dname_count_size_labels(), rbnode_type::key, val_anchors::lock, log_err(), trust_anchor::name, trust_anchor::namelabs, trust_anchor::namelen, trust_anchor::node, rbtree_search(), and val_anchors::tree.

Referenced by do_insecure_add().

anchors_delete_insecure()

void anchors_delete_insecure	(	struct val_anchors *	anchors,
		uint16_t	c,
		uint8_t *	nm
	)

Delete insecure point trust anchor.

Does not remove if no such point. For external use (locks and init_parents)

Parameters

anchors	anchor storage.
c	class.
nm	name of insecure trust point.

References anchors_delfunc(), anchors_init_parents_locked(), trust_anchor::autr, trust_anchor::dclass, dname_count_size_labels(), rbnode_type::key, trust_anchor::keylist, val_anchors::lock, trust_anchor::lock, trust_anchor::name, trust_anchor::namelabs, trust_anchor::namelen, trust_anchor::node, trust_anchor::numDNSKEY, trust_anchor::numDS, rbtree_delete(), rbtree_search(), and val_anchors::tree.

Referenced by do_insecure_remove().

anchor_list_keytags()

size_t anchor_list_keytags	(	struct trust_anchor *	ta,
		uint16_t *	list,
		size_t	num
	)

Get a list of keytags for the trust anchor.

Zero tags for insecure points.

Parameters

ta	trust anchor (locked by caller).
list	array of uint16_t.
num	length of array.

Returns

number of keytags filled into array. If total number of keytags is bigger than the array, it is truncated at num. On errors, less keytags are filled in. The array is sorted.

References packed_rrset_data::count, lruhash_entry::data, dnskey_calc_keytag(), trust_anchor::dnskey_rrset, ds_get_keytag(), trust_anchor::ds_rrset, ub_packed_rrset_key::entry, keytag_compare(), trust_anchor::numDNSKEY, and trust_anchor::numDS.

Referenced by anchor_has_keytag().

anchor_has_keytag()

int anchor_has_keytag	(	struct val_anchors *	anchors,
		uint8_t *	name,
		int	namelabs,
		size_t	namelen,
		uint16_t	dclass,
		uint16_t	keytag
	)

Check if there is a trust anchor for given zone with this keytag.

Parameters

anchors	anchor storage
name	name of trust anchor (wireformat)
namelabs	labels in name
namelen	length of name
dclass	class of trust anchor
keytag	keytag

Returns

1 if there is a trust anchor in the trustachor store for this zone and keytag, else 0.

References anchor_find(), anchor_list_keytags(), trust_anchor::dclass, trust_anchor::lock, trust_anchor::name, trust_anchor::namelabs, trust_anchor::namelen, trust_anchor::numDNSKEY, and trust_anchor::numDS.

anchors_find_any_noninsecure()

struct trust_anchor* anchors_find_any_noninsecure

(

struct val_anchors *

anchors

)

Find an anchor that is not an insecure point, if any, or there are no DNSSEC verification anchors if none.

Parameters

anchors

anchor storage

Returns

trust anchor or NULL. It is locked.

References val_anchors::lock, trust_anchor::lock, trust_anchor::node, trust_anchor::numDNSKEY, trust_anchor::numDS, rbtree_first(), rbtree_next(), RBTREE_NULL, and val_anchors::tree.

Referenced by val_init().