Class DSAGenParameterSpec

java.lang.Object

java.security.spec.DSAGenParameterSpec

All Implemented Interfaces:: AlgorithmParameterSpec

public final class DSAGenParameterSpec extends Object implements AlgorithmParameterSpec

This immutable class specifies the set of parameters used for generating DSA parameters as specified in FIPS 186-3 Digital Signature Standard (DSS).

Since:

1.8

External Specifications

See Also:

Constructor Summary

Constructor	Description
`DSAGenParameterSpec(int primePLen, int subprimeQLen)`	Creates a domain parameter specification for DSA parameter generation using `primePLen` and `subprimeQLen`.
`DSAGenParameterSpec(int primePLen, int subprimeQLen, int seedLen)`	Creates a domain parameter specification for DSA parameter generation using `primePLen`, `subprimeQLen`, and `seedLen`.

Method Summary

Modifier and Type	Method	Description
`int`	`getPrimePLength()`	Returns the desired length of the prime P of the to-be-generated DSA domain parameters in bits.
`int`	`getSeedLength()`	Returns the desired length of the domain parameter seed in bits.
`int`	`getSubprimeQLength()`	Returns the desired length of the sub-prime Q of the to-be-generated DSA domain parameters in bits.

Methods declared in class Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

DSAGenParameterSpec

public DSAGenParameterSpec(int primePLen, int subprimeQLen)

Creates a domain parameter specification for DSA parameter generation using primePLen and subprimeQLen. The value of subprimeQLen is also used as the default length of the domain parameter seed in bits.

Parameters:: primePLen - the desired length of the prime P in bits.; subprimeQLen - the desired length of the sub-prime Q in bits.
Throws:: IllegalArgumentException - if primePLen or subprimeQLen is illegal per the specification of FIPS 186-3.

DSAGenParameterSpec

public DSAGenParameterSpec(int primePLen, int subprimeQLen, int seedLen)

Creates a domain parameter specification for DSA parameter generation using primePLen, subprimeQLen, and seedLen.

Parameters:: primePLen - the desired length of the prime P in bits.; subprimeQLen - the desired length of the sub-prime Q in bits.; seedLen - the desired length of the domain parameter seed in bits, shall be equal to or greater than subprimeQLen.
Throws:: IllegalArgumentException - if primePLenLen, subprimeQLen, or seedLen is illegal per the specification of FIPS 186-3.

Method Details

getPrimePLength

public int getPrimePLength()

Returns the desired length of the prime P of the to-be-generated DSA domain parameters in bits.

Returns:: the length of the prime P.

getSubprimeQLength

public int getSubprimeQLength()

Returns the desired length of the sub-prime Q of the to-be-generated DSA domain parameters in bits.

Returns:: the length of the sub-prime Q.

getSeedLength

public int getSeedLength()

Returns the desired length of the domain parameter seed in bits.

Returns:: the length of the domain parameter seed.

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