gnu.crypto.key.dss
Class DSSKeyPairGenerator

java.lang.Object
  gnu.crypto.key.dss.DSSKeyPairGenerator

All Implemented Interfaces:

IKeyPairGenerator

public class DSSKeyPairGenerator

extends java.lang.Object

implements IKeyPairGenerator

A key-pair generator for asymetric keys to use in conjunction with the DSS (Digital Signature Standard).

References:
Digital Signature Standard (DSS), Federal Information Processing Standards Publication 186. National Institute of Standards and Technology.

Version:

$Revision: 1.2 $

Field Summary

static java.lang.String	DSS_PARAMETERS Property name of an optional DSAParameterSpec instance to use for this generator's p, q, and g values.
static java.security.spec.DSAParameterSpec	KEY_PARAMS_1024
static java.security.spec.DSAParameterSpec	KEY_PARAMS_512
static java.security.spec.DSAParameterSpec	KEY_PARAMS_768
static java.lang.String	MODULUS_LENGTH Property name of the length (Integer) of the modulus (p) of a DSS key.
static java.lang.String	SOURCE_OF_RANDOMNESS Property name of an optional SecureRandom instance to use.
static java.lang.String	USE_DEFAULTS Property name of the Boolean indicating wether or not to use defaults.

Constructor Summary

DSSKeyPairGenerator()

Method Summary

java.security.KeyPair	generate() Generates a new keypair based on the attributes used to configure the instance.
java.lang.String	name() Returns the canonical name of this keypair generator.
void	setup(java.util.Map attributes) Configures this instance.

Methods inherited from class java.lang.Object

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

Field Detail

MODULUS_LENGTH

public static final java.lang.String MODULUS_LENGTH

Property name of the length (Integer) of the modulus (p) of a DSS key.

See Also:

Constant Field Values

USE_DEFAULTS

public static final java.lang.String USE_DEFAULTS

Property name of the Boolean indicating wether or not to use defaults.

See Also:

Constant Field Values

SOURCE_OF_RANDOMNESS

public static final java.lang.String SOURCE_OF_RANDOMNESS

Property name of an optional SecureRandom instance to use. The default is to use a classloader singleton from PRNG.

See Also:

Constant Field Values

DSS_PARAMETERS

public static final java.lang.String DSS_PARAMETERS

Property name of an optional DSAParameterSpec instance to use for this generator's p, q, and g values. The default is to generate these values or use pre-computed ones, depending on the value of the USE_DEFAULTS attribute.

See Also:

Constant Field Values

KEY_PARAMS_512

public static final java.security.spec.DSAParameterSpec KEY_PARAMS_512

KEY_PARAMS_768

public static final java.security.spec.DSAParameterSpec KEY_PARAMS_768

KEY_PARAMS_1024

public static final java.security.spec.DSAParameterSpec KEY_PARAMS_1024

Constructor Detail

DSSKeyPairGenerator

public DSSKeyPairGenerator()

Method Detail

name

public java.lang.String name()

Description copied from interface: IKeyPairGenerator

Returns the canonical name of this keypair generator.

Specified by:

name in interface IKeyPairGenerator

Returns:

the canonical name of this instance.

setup

public void setup(java.util.Map attributes)

Configures this instance.

Specified by:

setup in interface IKeyPairGenerator

Parameters:

attributes - the map of name/value pairs to use.

Throws:

java.lang.IllegalArgumentException - if the designated MODULUS_LENGTH value is not greater than 512, less than 1024 and not of the form 512 + 64j.

generate

public java.security.KeyPair generate()

Description copied from interface: IKeyPairGenerator

Generates a new keypair based on the attributes used to configure the instance.

Specified by:

generate in interface IKeyPairGenerator

Returns:

a new keypair.