MGF1ParameterSpec

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 --
 }
 

Field Summary

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

Public Constructor Summary

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

Public Method Summary

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

Inherited Method Summary

Fields

public static final MGF1ParameterSpec SHA1

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

public static final MGF1ParameterSpec SHA256

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

public static final MGF1ParameterSpec SHA384

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

public static final MGF1ParameterSpec SHA512

The MGF1ParameterSpec which uses SHA-512 message digest.

Public Constructors

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.

Public Methods

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.