Package org.xbill.DNS

Class NSEC3PARAMRecord

java.lang.Object

org.xbill.DNS.Record

org.xbill.DNS.NSEC3PARAMRecord

All Implemented Interfaces:

Serializable, Cloneable, Comparable<Record>

public class NSEC3PARAMRecord
extends Record

Next SECure name 3 Parameters - this record contains the parameters (hash algorithm, salt, iterations) used for a valid, complete NSEC3 chain present in a zone. Zones signed using NSEC3 must include this record at the zone apex to inform authoritative servers that NSEC3 is being used with the given parameters.

Author:

Brian Wellington, David Blacka

See Also:

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

Field Summary

Fields inherited from class org.xbill.DNS.Record

dclass, name, ttl, type

Constructor Summary

Constructors

Constructor	Description
NSEC3PARAMRecord(Name name, int dclass, long ttl, int hashAlg, int flags, int iterations, byte[] salt)	Creates an NSEC3PARAM 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[]	getSalt()	Returns the salt
byte[]	hashName(Name name)	Hashes a name with the parameters of this NSEC3PARAM record.
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

Constructor Details

NSEC3PARAMRecord

public NSEC3PARAMRecord(Name name,
 int dclass,
 long ttl,
 int hashAlg,
 int flags,
 int iterations,
 byte[] salt)

Creates an NSEC3PARAM record from the given data.

Parameters:

name - The ownername of the NSEC3PARAM record (generally the zone name).

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).

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

hashName

public byte[] hashName(Name name)
                throws NoSuchAlgorithmException

Hashes a name with the parameters of this NSEC3PARAM record.

Parameters:

name - The name to hash

Returns:

The hashed version of the name

Throws:

NoSuchAlgorithmException - The hash algorithm is unknown.