iaik.security.ecc.ecdsa
Class ECPrivateKey

java.lang.Object
  iaik.pkcs.pkcs8.PrivateKeyInfo
      iaik.security.ecc.ecdsa.ECPrivateKey

All Implemented Interfaces:

iaik.asn1.ASN1Type, java.lang.Cloneable, ECDSAKey, ECDSAPrivateKey, java.security.Key, java.security.PrivateKey, java.io.Serializable

public class ECPrivateKey

extends iaik.pkcs.pkcs8.PrivateKeyInfo

implements ECDSAPrivateKey

Representation of a private key for the ECDSA algorithm and implementation of the PrivateKey Interface

See Also:

Serialized Form

Field Summary

protected static java.lang.String	ALGORITHM the name of the algorithm
static iaik.asn1.INTEGER	EC_PRIVATE_KEY_VERSION the version field in the ASN.1 encoding
static iaik.asn1.ObjectID	OID object identifier for the ASN.1 structure

Fields inherited from class iaik.pkcs.pkcs8.PrivateKeyInfo

private_key_algorithm

Fields inherited from interface java.security.PrivateKey

serialVersionUID

Constructor Summary

ECPrivateKey(byte[] key)
Creates a private key from an DER encoded PKCS8 key.

ECPrivateKey(ECDSAParameter p, java.math.BigInteger s, ECPoint w)
Creates a new private key with the specified parameters.

ECPrivateKey(ECDSAPrivateKeySpec spec)
Create a new private key from the key spec.

ECPrivateKey(java.io.InputStream is)
Reads an DER encoded PKCS#8 private key from an input stream.

Method Summary

void	decode(byte[] privateKey) Decodes the DER encoded private key.
protected byte[]	encode()
java.lang.String	getAlgorithm() Implementation of the interface method.
ECDSAParams	getParameter()
ECDSAPublicKey	getPublicKey()
java.math.BigInteger	getS()
java.lang.String	toString() Overwrites this method to provide detailled Information.

Methods inherited from class iaik.pkcs.pkcs8.PrivateKeyInfo

clone, createPrivateKeyInfo, decode, equals, getEncoded, getFormat, getPrivateKey, getPrivateKey, hashCode, toASN1Object, writeTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.security.Key

getEncoded, getFormat

Field Detail

EC_PRIVATE_KEY_VERSION

public static final iaik.asn1.INTEGER EC_PRIVATE_KEY_VERSION

the version field in the ASN.1 encoding

OID

public static final iaik.asn1.ObjectID OID

object identifier for the ASN.1 structure

ALGORITHM

protected static final java.lang.String ALGORITHM

the name of the algorithm

See Also:

getAlgorithm(), Constant Field Values

Constructor Detail

ECPrivateKey

public ECPrivateKey(byte[] key)
             throws java.security.InvalidKeyException

Creates a private key from an DER encoded PKCS8 key.

Parameters:

key - the DER byte array.

Throws:

java.security.InvalidKeyException - if the encoded key is invalid.

ECPrivateKey

public ECPrivateKey(ECDSAParameter p,
                    java.math.BigInteger s,
                    ECPoint w)

Creates a new private key with the specified parameters.

Parameters:

p - the domain parameters

s - the private key

w - the corresponding public key (may be null)

ECPrivateKey

public ECPrivateKey(ECDSAPrivateKeySpec spec)

Create a new private key from the key spec. The corresponding public key will be null !

Parameters:

spec - the key material

ECPrivateKey

public ECPrivateKey(java.io.InputStream is)
             throws java.security.InvalidKeyException,
                    java.io.IOException

Reads an DER encoded PKCS#8 private key from an input stream.

Parameters:

is - the input stream providing the data

Throws:

java.security.InvalidKeyException - if the provided key data is invalid.

java.io.IOException

Method Detail

decode

public void decode(byte[] privateKey)
            throws java.security.InvalidKeyException

Decodes the DER encoded private key.

Parameters:

privateKey - the DER byte array.

Throws:

java.security.InvalidKeyException - if the provided key data is invalid.

getAlgorithm

public java.lang.String getAlgorithm()

Implementation of the interface method.

Specified by:

getAlgorithm in interface java.security.Key

Returns:

"ECDSA"

getParameter

public ECDSAParams getParameter()

Specified by:

getParameter in interface ECDSAKey

Returns:

the elliptic curve domain parameters.

getPublicKey

public ECDSAPublicKey getPublicKey()

Returns:

the corresponding public key, if known (null otherwise)

getS

public java.math.BigInteger getS()

Specified by:

getS in interface ECDSAPrivateKey

Returns:

the private key s.

toString

public java.lang.String toString()

Overwrites this method to provide detailled Information.

Returns:

the private key, the domain parameters, and if available the corresponding public key.

encode

protected byte[] encode()

Returns:

the DER encoded private key