Package java.security.spec

Class PSSParameterSpec

java.lang.Object

java.security.spec.PSSParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class PSSParameterSpec
extends Object
implements AlgorithmParameterSpec

The parameter specification for the RSA-PSS Signature scheme.

Defined in the PKCS #1 v2.1 standard.

Field Summary

Fields

Modifier and Type	Field	Description
static PSSParameterSpec	DEFAULT	The default parameter specification.

Constructor Summary

Constructors

Constructor	Description
PSSParameterSpec(int saltLen)	Creates a new PSSParameterSpec with the specified salt length and the default values.
PSSParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, int saltLen, int trailerField)	Creates a new PSSParameterSpec with the specified message digest name, mask generation function name, mask generation function parameters, salt length, and trailer field value.

Method Summary

Modifier and Type	Method	Description
String	getDigestAlgorithm()	Returns the name of the message digest algorithm.
String	getMGFAlgorithm()	Returns the name of the mask generation function algorithm.
AlgorithmParameterSpec	getMGFParameters()	Returns the parameter for the mask generation function algorithm.
int	getSaltLength()	Returns the length of the salt (in bits).
int	getTrailerField()	Returns the trailer field value.

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT

public static final PSSParameterSpec DEFAULT

The default parameter specification. It specifies the following parameters:

• message digest: "SHA-1"
• mask generation function (mgf): "MGF1"
• parameters for the mgf: MGF1ParameterSpec.SHA1
• salt length: 20
• trailer field: -1

Constructor Details

PSSParameterSpec

public PSSParameterSpec(int saltLen)

Creates a new PSSParameterSpec with the specified salt length and the default values.

Parameters:

saltLen - the salt length (in bits).

Throws:

IllegalArgumentException - if saltLen is negative.

PSSParameterSpec

public PSSParameterSpec(String mdName,
String mgfName,
AlgorithmParameterSpec mgfSpec,
int saltLen,
int trailerField)

Creates a new PSSParameterSpec with the specified message digest name, mask generation function name, mask generation function parameters, salt length, and trailer field value.

Parameters:

mdName - the name of the message digest algorithm.

mgfName - the name of the mask generation function algorithm.

mgfSpec - the parameter for the mask generation function algorithm.

saltLen - the salt length (in bits).

trailerField - the trailer field value.

Throws:

IllegalArgumentException - if saltLen or trailerField is negative.

Method Details

getSaltLength

public int getSaltLength()

Returns the length of the salt (in bits).

Returns:

the length of the salt (in bits).

getDigestAlgorithm

public String getDigestAlgorithm()

Returns the name of the message digest algorithm.

Returns:

the name of the message digest algorithm.

getMGFAlgorithm

public String getMGFAlgorithm()

Returns the name of the mask generation function algorithm.

Returns:

the name of the mask generation function algorithm.

getMGFParameters

public AlgorithmParameterSpec getMGFParameters()

Returns the parameter for the mask generation function algorithm.

Returns:

the parameter for the mask generation function algorithm, or null if none specified.

getTrailerField

public int getTrailerField()

Returns the trailer field value.

Returns:

the trailer field value.