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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

Modifier and Type	Field and Description
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 and Description

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

Method Summary

Modifier and Type	Method and Description
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.