Class EdDSAPublicKey
- java.lang.Object
-
- net.i2p.crypto.eddsa.EdDSAPublicKey
-
- All Implemented Interfaces:
java.io.Serializable
,java.security.Key
,java.security.PublicKey
,EdDSAKey
public class EdDSAPublicKey extends java.lang.Object implements EdDSAKey, java.security.PublicKey
An EdDSA public key.Warning: Public key encoding is is based on the current curdle WG draft, and is subject to change. See getEncoded().
For compatibility with older releases, decoding supports both the old and new draft specifications. See decode().
Ref: https://tools.ietf.org/html/draft-ietf-curdle-pkix-04
Old Ref: https://tools.ietf.org/html/draft-josefsson-pkix-eddsa-04
- See Also:
- Serialized Form
-
-
Field Summary
Fields Modifier and Type Field Description private GroupElement
A
private byte[]
Abyte
private GroupElement
Aneg
private EdDSAParameterSpec
edDsaSpec
private static int
IDLEN_BYTE
private static int
OID_BYTE
private static int
OID_ED25519
private static int
OID_OLD
private static long
serialVersionUID
-
Fields inherited from interface net.i2p.crypto.eddsa.EdDSAKey
KEY_ALGORITHM
-
-
Constructor Summary
Constructors Constructor Description EdDSAPublicKey(java.security.spec.X509EncodedKeySpec spec)
EdDSAPublicKey(EdDSAPublicKeySpec spec)
-
Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description private static byte[]
decode(byte[] d)
Extracts the public key bytes from the provided encoding.boolean
equals(java.lang.Object o)
GroupElement
getA()
byte[]
getAbyte()
java.lang.String
getAlgorithm()
byte[]
getEncoded()
Returns the public key in its canonical encoding.java.lang.String
getFormat()
GroupElement
getNegativeA()
EdDSAParameterSpec
getParams()
int
hashCode()
-
-
-
Field Detail
-
serialVersionUID
private static final long serialVersionUID
- See Also:
- Constant Field Values
-
A
private final GroupElement A
-
Aneg
private GroupElement Aneg
-
Abyte
private final byte[] Abyte
-
edDsaSpec
private final EdDSAParameterSpec edDsaSpec
-
OID_OLD
private static final int OID_OLD
- See Also:
- Constant Field Values
-
OID_ED25519
private static final int OID_ED25519
- See Also:
- Constant Field Values
-
OID_BYTE
private static final int OID_BYTE
- See Also:
- Constant Field Values
-
IDLEN_BYTE
private static final int IDLEN_BYTE
- See Also:
- Constant Field Values
-
-
Constructor Detail
-
EdDSAPublicKey
public EdDSAPublicKey(EdDSAPublicKeySpec spec)
-
EdDSAPublicKey
public EdDSAPublicKey(java.security.spec.X509EncodedKeySpec spec) throws java.security.spec.InvalidKeySpecException
- Throws:
java.security.spec.InvalidKeySpecException
-
-
Method Detail
-
getAlgorithm
public java.lang.String getAlgorithm()
- Specified by:
getAlgorithm
in interfacejava.security.Key
-
getFormat
public java.lang.String getFormat()
- Specified by:
getFormat
in interfacejava.security.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/draft-ietf-curdle-pkix-04
- 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 interfacejava.security.Key
- Returns:
- 44 bytes for Ed25519, null for other curves
-
decode
private static byte[] decode(byte[] d) throws java.security.spec.InvalidKeySpecException
Extracts the public key bytes from the provided encoding.This will decode data conforming to the current spec at https://tools.ietf.org/html/draft-ietf-curdle-pkix-04 or the old spec at https://tools.ietf.org/html/draft-josefsson-pkix-eddsa-04.
Contrary to draft-ietf-curdle-pkix-04, it WILL accept a parameter value of NULL, as it is required for interoperability with the default Java keystore. Other implementations MUST NOT copy this behaviour from here unless they also need to read keys from the default Java keystore.
This is really dumb for now. It does not use a general-purpose ASN.1 decoder. See also getEncoded().
- Returns:
- 32 bytes for Ed25519, throws for other curves
- Throws:
java.security.spec.InvalidKeySpecException
-
getParams
public EdDSAParameterSpec getParams()
-
getA
public GroupElement getA()
-
getNegativeA
public GroupElement getNegativeA()
-
getAbyte
public byte[] getAbyte()
-
hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
-
equals
public boolean equals(java.lang.Object o)
- Overrides:
equals
in classjava.lang.Object
-
-