Package org.xbill.DNS

Class NSEC3Record

java.lang.Object

org.xbill.DNS.Record

org.xbill.DNS.NSEC3Record

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Record>

public class NSEC3Record
extends Record

Next SECure name 3 - this record contains the next hashed name in an ordered list of hashed names in the zone, and a set of types for which records exist for this name. The presence of this record in a response signifies a negative response from a DNSSEC-signed zone.

This replaces the NSEC and NXT records, when used.

Author:

Brian Wellington, David Blacka

See Also:

• RFC 5155: DNS Security (DNSSEC) Hashed Authenticated Denial of Existence
• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NSEC3Record.Digest
static class	NSEC3Record.Flags

Field Summary

Fields

Modifier and Type	Field	Description
static final int	SHA1_DIGEST_ID

Fields inherited from class org.xbill.DNS.Record

dclass, name, ttl, type

Constructor Summary

Constructors

Constructor	Description
NSEC3Record(Name name, int dclass, long ttl, int hashAlg, int flags, int iterations, byte[] salt, byte[] next, int[] types)	Creates an NSEC3 record from the given data.

Method Summary

Modifier and Type	Method	Description
int	getFlags()	Returns the flags
int	getHashAlgorithm()	Returns the hash algorithm
int	getIterations()	Returns the number of iterations
byte[]	getNext()	Returns the next hash
byte[]	getSalt()	Returns the salt
int[]	getTypes()	Returns the set of types defined for this name
byte[]	hashName(Name name)	Hashes a name with the parameters of this NSEC3 record.
boolean	hasType(int type)	Returns whether a specific type is in the set of types.
protected void	rdataFromString(Tokenizer st, Name origin)	Converts the text format of an RR to the internal format - must be overriden
protected void	rrFromWire(DNSInput in)	Converts the type-specific RR to wire format - must be overridden
protected String	rrToString()	Converts rdata to a String
protected void	rrToWire(DNSOutput out, Compression c, boolean canonical)	Converts the type-specific RR to wire format - must be overridden.

Methods inherited from class org.xbill.DNS.Record

byteArrayFromString, byteArrayToString, compareTo, equals, fromString, fromString, fromWire, getAdditionalName, getDClass, getName, getRRsetType, getTTL, getType, hashCode, newRecord, newRecord, newRecord, newRecord, rdataToString, rdataToWireCanonical, sameRRset, sameRRset, toString, toWire, toWireCanonical, unknownToString, withName

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

SHA1_DIGEST_ID

public static final int SHA1_DIGEST_ID

See Also:

• Constant Field Values

Constructor Details

NSEC3Record

public NSEC3Record(Name name,
 int dclass,
 long ttl,
 int hashAlg,
 int flags,
 int iterations,
 byte[] salt,
 byte[] next,
 int[] types)

Creates an NSEC3 record from the given data.

Parameters:

name - The ownername of the NSEC3 record (base32'd hash plus zonename).

dclass - The class.

ttl - The TTL.

hashAlg - The hash algorithm.

flags - The value of the flags field.

iterations - The number of hash iterations.

salt - The salt to use (may be null).

next - The next hash (may not be null).

types - The types present at the original ownername.

Method Details

rrFromWire

protected void rrFromWire(DNSInput in)
                   throws IOException

Description copied from class: Record

Converts the type-specific RR to wire format - must be overridden

Specified by:

rrFromWire in class Record

Throws:

IOException

rrToWire

protected void rrToWire(DNSOutput out,
 Compression c,
 boolean canonical)

Description copied from class: Record

Converts the type-specific RR to wire format - must be overridden.

Specified by:

rrToWire in class Record

rdataFromString

protected void rdataFromString(Tokenizer st,
 Name origin)
                        throws IOException

Description copied from class: Record

Converts the text format of an RR to the internal format - must be overriden

Specified by:

rdataFromString in class Record

Throws:

IOException

rrToString

protected String rrToString()

Converts rdata to a String

Specified by:

rrToString in class Record

getHashAlgorithm

public int getHashAlgorithm()

Returns the hash algorithm

getFlags

public int getFlags()

Returns the flags

getIterations

public int getIterations()

Returns the number of iterations

getSalt

public byte[] getSalt()

Returns the salt

getNext

public byte[] getNext()

Returns the next hash

getTypes

public int[] getTypes()

Returns the set of types defined for this name

hasType

public boolean hasType(int type)

Returns whether a specific type is in the set of types.

hashName

public byte[] hashName(Name name)
                throws NoSuchAlgorithmException

Hashes a name with the parameters of this NSEC3 record.

Parameters:

name - The name to hash

Returns:

The hashed version of the name

Throws:

NoSuchAlgorithmException - The hash algorithm is unknown.