net.i2p.crypto.eddsa

Class EdDSAPublicKey

java.lang.Object

net.i2p.crypto.eddsa.EdDSAPublicKey

All Implemented Interfaces:

Serializable, Key, PublicKey, EdDSAKey

public class EdDSAPublicKey
extends Object
implements EdDSAKey, PublicKey

An EdDSA public key.

For compatibility with older releases, decoding supports both RFC 8410 and an older draft specification.

Author:

str4d

See Also:

RFC 8410, Older draft specification, Serialized Form

Field Summary

Fields inherited from interface net.i2p.crypto.eddsa.EdDSAKey

KEY_ALGORITHM

Constructor Summary

Constructors

Constructor and Description
EdDSAPublicKey(EdDSAPublicKeySpec spec)
EdDSAPublicKey(X509EncodedKeySpec spec)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
GroupElement	getA()
byte[]	getAbyte()
String	getAlgorithm()
byte[]	getEncoded() Returns the public key in its canonical encoding.
String	getFormat()
GroupElement	getNegativeA()
EdDSAParameterSpec	getParams()
int	hashCode()

Methods inherited from class java.lang.Object

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

Constructor Detail

EdDSAPublicKey

public EdDSAPublicKey(EdDSAPublicKeySpec spec)

EdDSAPublicKey

public EdDSAPublicKey(X509EncodedKeySpec spec)
               throws InvalidKeySpecException

Throws:

InvalidKeySpecException

Method Detail

getAlgorithm

public String getAlgorithm()

Specified by:

getAlgorithm in interface Key

getFormat

public String getFormat()

Specified by:

getFormat in interface Key

getEncoded

public byte[] getEncoded()

Returns the public key in its canonical encoding.

This implements the following specs:

• General encoding: https://tools.ietf.org/html/rfc8410
• Key encoding: https://tools.ietf.org/html/rfc8032

For keys in older formats, decoding and then re-encoding is sufficient to migrate them to the canonical encoding.

Relevant spec quotes:

  In the X.509 certificate, the subjectPublicKeyInfo field has the
  SubjectPublicKeyInfo type, which has the following ASN.1 syntax:

  SubjectPublicKeyInfo  ::=  SEQUENCE  {
    algorithm         AlgorithmIdentifier,
    subjectPublicKey  BIT STRING
  }
 

  AlgorithmIdentifier  ::=  SEQUENCE  {
    algorithm   OBJECT IDENTIFIER,
    parameters  ANY DEFINED BY algorithm OPTIONAL
  }

  For all of the OIDs, the parameters MUST be absent.
 

  id-Ed25519   OBJECT IDENTIFIER ::= { 1 3 101 112 }
 

Specified by:

getEncoded in interface Key

Returns:

44 bytes for Ed25519, null for other curves

getParams

public EdDSAParameterSpec getParams()

Specified by:

getParams in interface EdDSAKey

Returns:

a parameter specification representing the EdDSA domain parameters for the key.

getA

public GroupElement getA()

getNegativeA

public GroupElement getNegativeA()

getAbyte

public byte[] getAbyte()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object