java.security.spec
Class MGF1ParameterSpec

java.lang.Object   
  java.security.spec.MGF1ParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class MGF1ParameterSpec
extends Object   
implements AlgorithmParameterSpec   

This class specifies the set of parameters used with mask generation function MGF1 in OAEP Padding and RSA-PSS signature scheme, as defined in the PKCS #1 v2.1 standard.

Its ASN.1 definition in PKCS#1 standard is described below:

 MGF1Parameters ::= OAEP-PSSDigestAlgorthms
 

where

 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 --
 }
 

Since:

1.5

See Also:

PSSParameterSpec , OAEPParameterSpec

Field Summary

static MGF1ParameterSpec	SHA1 The MGF1ParameterSpec which uses "SHA-1" message digest.
static MGF1ParameterSpec	SHA256 The MGF1ParameterSpec which uses "SHA-256" message digest.
static MGF1ParameterSpec	SHA384 The MGF1ParameterSpec which uses "SHA-384" message digest.
static MGF1ParameterSpec	SHA512 The MGF1ParameterSpec which uses SHA-512 message digest.

Constructor Summary

MGF1ParameterSpec (String mdName)
Constructs a parameter set for mask generation function MGF1 as defined in the PKCS #1 standard.

Method Summary

String

getDigestAlgorithm () Returns the algorithm name of the message digest used by the mask generation function.

Methods inherited from class java.lang.Object

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

Field Detail

SHA1

public static final MGF1ParameterSpec    SHA1

The MGF1ParameterSpec which uses "SHA-1" message digest.

SHA256

public static final MGF1ParameterSpec    SHA256

The MGF1ParameterSpec which uses "SHA-256" message digest.

SHA384

public static final MGF1ParameterSpec    SHA384

The MGF1ParameterSpec which uses "SHA-384" message digest.

SHA512

public static final MGF1ParameterSpec    SHA512

The MGF1ParameterSpec which uses SHA-512 message digest.

Constructor Detail

MGF1ParameterSpec

public MGF1ParameterSpec(String    mdName)

Constructs a parameter set for mask generation function MGF1 as defined in the PKCS #1 standard.

Parameters:

mdName - the algorithm name for the message digest used in this mask generation function MGF1.

Throws:

NullPointerException - if mdName is null.

Method Detail

getDigestAlgorithm

public String    getDigestAlgorithm()

Returns the algorithm name of the message digest used by the mask generation function.

Returns:

the algorithm name of the message digest.