File	Doc	Category	Size	Date	Package
PSSParameterSpec.java	API Doc	Java SE 6 API	5624	Tue Jun 10 00:25:48 BST 2008	java.security.spec

PSSParameterSpec

• java.lang.Object

RSASSA-PSS-params ::= SEQUENCE {
hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1,
maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1,
saltLength [2] INTEGER DEFAULT 20,
trailerField [3] INTEGER DEFAULT 1
}

OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= {
{ OID id-sha1 PARAMETERS NULL }|
{ OID id-sha256 PARAMETERS NULL }|
{ OID id-sha384 PARAMETERS NULL }|
{ OID id-sha512 PARAMETERS NULL },
... -- Allows for future expansion --
}

PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= {
{ OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms },
... -- Allows for future expansion --
}

Fields Summary
private String	mdName
private String	mgfName
private AlgorithmParameterSpec	mgfSpec
private int	saltLen
private int	trailerField
public static final PSSParameterSpec	DEFAULT The PSS parameter set with all default values.

Constructors Summary
private PSSParameterSpec() Constructs a new PSSParameterSpec as defined in the PKCS #1 standard using the default values.
public PSSParameterSpec(String mdName, String mgfName, AlgorithmParameterSpec mgfSpec, int saltLen, int trailerField) Creates a new PSSParameterSpec as defined in the PKCS #1 standard using the specified message digest, mask generation function, parameters for mask generation function, salt length, and trailer field values. param mdName the algorithm name of the hash function. param mgfName the algorithm name of the mask generation function. param mgfSpec the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters(). param saltLen the length of salt. param trailerField the value of the trailer field. exception NullPointerException if mdName, or mgfName is null. exception IllegalArgumentException if saltLen or trailerField is less than 0. since 1.5 if (mdName == null) { throw new NullPointerException("digest algorithm is null"); } if (mgfName == null) { throw new NullPointerException("mask generation function " + "algorithm is null"); } if (saltLen < 0) { throw new IllegalArgumentException("negative saltLen value: " + saltLen); } if (trailerField < 0) { throw new IllegalArgumentException("negative trailerField: " + trailerField); } this.mdName = mdName; this.mgfName = mgfName; this.mgfSpec = mgfSpec; this.saltLen = saltLen; this.trailerField = trailerField;
public PSSParameterSpec(int saltLen) Creates a new PSSParameterSpec using the specified salt length and other default values as defined in PKCS#1. param saltLen the length of salt in bits to be used in PKCS#1 PSS encoding. exception IllegalArgumentException if saltLen is less than 0. if (saltLen < 0) { throw new IllegalArgumentException("negative saltLen value: " + saltLen); } this.saltLen = saltLen;

Methods Summary
public java.lang.String	getDigestAlgorithm() Returns the message digest algorithm name. return the message digest algorithm name. since 1.5 return mdName;
public java.lang.String	getMGFAlgorithm() Returns the mask generation function algorithm name. return the mask generation function algorithm name. since 1.5 return mgfName;
public java.security.spec.AlgorithmParameterSpec	getMGFParameters() Returns the parameters for the mask generation function. return the parameters for the mask generation function. since 1.5 return mgfSpec;
public int	getSaltLength() Returns the salt length in bits. return the salt length. return saltLen;
public int	getTrailerField() Returns the value for the trailer field, i.e. bc in PKCS#1 v2.1. return the value for the trailer field, i.e. bc in PKCS#1 v2.1. since 1.5 return trailerField;