iaik.security.ecc.ecdsa
Class ECDSAKeyPairGeneratorImpl

java.lang.Object
  java.security.KeyPairGeneratorSpi
      java.security.KeyPairGenerator
          iaik.security.ecc.ecdsa.ECDSAKeyPairGeneratorImpl

All Implemented Interfaces:

ECDSAKeyPairGenerator

public class ECDSAKeyPairGeneratorImpl

extends java.security.KeyPairGenerator

implements ECDSAKeyPairGenerator

Implementation of a key pair generator for the ECDSA algorithm It is based on the Algorithm described in the P1363 standard.

Field Summary

static java.lang.String[]	DEFAULT_CURVES The name of the default curves
static int	DEFAULT_KEY_SIZE The default key size
static int[]	KEY_SIZES The key sizes of the default curves

Constructor Summary

ECDSAKeyPairGeneratorImpl()
Do not instantiate this class directly.

Method Summary

java.security.KeyPair	generateKeyPair() Generates the keys.
void	initialize(java.security.spec.AlgorithmParameterSpec spec) Initialize this keypair generator with ecc parameter spec.
void	initialize(ECDSAParams params, java.security.SecureRandom random) Implementation of ECDSAKeyPairGenerator Interface
void	initialize(int keysize, java.security.SecureRandom random) Parameterizes the engine with a NIST elliptic curve with the keysize 192, 224, 256, 384 or 521 bit.

Methods inherited from class java.security.KeyPairGenerator

genKeyPair, getAlgorithm, getInstance, getInstance, getInstance, getProvider, initialize, initialize

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CURVES

public static final java.lang.String[] DEFAULT_CURVES

The name of the default curves

See Also:

initialize(int keysize, SecureRandom random)

DEFAULT_KEY_SIZE

public static final int DEFAULT_KEY_SIZE

The default key size

See Also:

Constant Field Values

KEY_SIZES

public static final int[] KEY_SIZES

The key sizes of the default curves

Constructor Detail

ECDSAKeyPairGeneratorImpl

public ECDSAKeyPairGeneratorImpl()

Do not instantiate this class directly. Use the KeyPairGenerator.getInstance method instead.

Method Detail

generateKeyPair

public java.security.KeyPair generateKeyPair()

Generates the keys.

Returns:

the new generated key pair.

initialize

public void initialize(java.security.spec.AlgorithmParameterSpec spec)
                throws java.security.InvalidAlgorithmParameterException

Initialize this keypair generator with ecc parameter spec.

Parameters:

spec - an AlgorithmParameterSpec value, which must be a ECCParameterSpec

Throws:

java.security.InvalidAlgorithmParameterException - if the spec is invalid

initialize

public void initialize(ECDSAParams params,
                       java.security.SecureRandom random)

Implementation of ECDSAKeyPairGenerator Interface

Specified by:

initialize in interface ECDSAKeyPairGenerator

Parameters:

params - the domain parameters.

random - a secure random source, may also be null.

See Also:

ECDSAKeyPairGenerator

initialize

public void initialize(int keysize,
                       java.security.SecureRandom random)

Parameterizes the engine with a NIST elliptic curve with the keysize 192, 224, 256, 384 or 521 bit. This method always uses curves over prime fields.

Parameters:

keysize - the required strength. If no NIST parameters with this size is available the next stronger parameter is taken (or 521)

random - the source of randomness.