gnu.java.security.key.dss
Class DSSKeyPairGenerator
- 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.
KeyPair | generate()- Generates a new keypair based on the attributes used to configure the
instance.
|
String | name()- Returns the canonical name of this keypair generator.
|
void | setup(Map<K,V> attributes)- Configures this instance.
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
DSS_PARAMETERS
public static final 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.
MODULUS_LENGTH
public static final String MODULUS_LENGTH
Property name of the length (Integer) of the modulus (p) of a DSS key.
PREFERRED_ENCODING_FORMAT
public static final String PREFERRED_ENCODING_FORMAT
Property name of the preferred encoding format to use when externalizing
generated instance of key-pairs from this generator. The property is taken
to be an
Integer that encapsulates an encoding format identifier.
- "gnu.crypto.dss.encoding"
STRICT_DEFAULTS
public static final String STRICT_DEFAULTS
Property name of the Boolean indicating wether or not to generate new
parameters, even if the modulus length
L is not one of the pre-
computed defaults (value
Boolean.FALSE), or throw an exception
(value
Boolean.TRUE) -- the exception in this case is an
IllegalArgumentException. The default value for this property is
Boolean.FALSE. The ultimate behaviour of this generator will
depend on the values of this and
USE_DEFAULTS properties -- see
USE_DEFAULTS for more information.
- "gnu.crypto.dss.strict.defaults"
USE_DEFAULTS
public static final String USE_DEFAULTS
Property name of the Boolean indicating wether or not to use default pre-
computed values of
p,
q and
g
for a given modulus length. The ultimate behaviour of this generator with
regard to using pre-computed parameter sets will depend on the value of
this property and of the following one
STRICT_DEFAULTS:
- If this property is
Boolean.FALSE then this generator will
accept being setup for generating parameters for any modulus length
provided the modulus length is between 512 and
1024, and is of the form 512 + 64 * n. In
addition, a new paramter set will always be generated; i.e. no pre-
computed values are used. - If this property is
Boolean.TRUE and the value of
STRICT_DEFAULTS is also Boolean.TRUE then this generator
will only accept being setup for generating parameters for modulus lengths
of 512, 768 and 1024. Any
other value, of the modulus length, even if between 512 and
1024, and of the form 512 + 64 * n, will
cause an IllegalArgumentException to be thrown. When those modulus
length (512, 768, and 1024)
are specified, the paramter set is always the same. - Finally, if this property is
Boolean.TRUE and the value of
STRICT_DEFAULTS is Boolean.FALSE then this generator will
behave as in point 1 above, except that it will use pre-computed values
when possible; i.e. the modulus length is one of 512,
768, or 1024.
The default value of this property is
Boolean.TRUE.
- "gnu.crypto.dss.use.defaults"
DSSKeyPairGenerator.java --
Copyright 2001, 2002, 2003, 2006, 2010 Free Software Foundation, Inc.
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