Class 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 RSASSA-PSS signature scheme, as defined in the PKCS#1 v2.2 standard.

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

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

where

HashAlgorithm ::= AlgorithmIdentifier {
   {OAEP-PSSDigestAlgorithms}
 }

 OAEP-PSSDigestAlgorithms    ALGORITHM-IDENTIFIER ::= {
   { OID id-sha1       PARAMETERS NULL }|
   { OID id-sha224     PARAMETERS NULL }|
   { OID id-sha256     PARAMETERS NULL }|
   { OID id-sha384     PARAMETERS NULL }|
   { OID id-sha512     PARAMETERS NULL }|
   { OID id-sha512-224 PARAMETERS NULL }|
   { OID id-sha512-256 PARAMETERS NULL },
   ...  -- Allows for future expansion --
 }

Fields

SHA1

public static final MGF1ParameterSpec SHA1

The MGF1ParameterSpec which uses "SHA-1" message digest

SHA224

public static final MGF1ParameterSpec SHA224

The MGF1ParameterSpec which uses "SHA-224" 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

SHA512_224

public static final MGF1ParameterSpec SHA512_224

The MGF1ParameterSpec which uses SHA-512/224 message digest

SHA512_256

public static final MGF1ParameterSpec SHA512_256

The MGF1ParameterSpec which uses SHA-512/256 message digest

Constructors

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.

Methods

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.