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## gnu.crypto.sig.dss
Class DSSKeyPairGenerator

    java.lang.Object
      |
      +--gnu.crypto.sig.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: 1.4 $

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.

### USE_DEFAULTS

    public static final java.lang.String USE_DEFAULTS

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

### 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`.

### 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.

### 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`
  Following copied from interface: `gnu.crypto.sig.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`
  Following copied from interface: `gnu.crypto.sig.IKeyPairGenerator`
  Returns:
    a new keypair.

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