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 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 --
 }

Since:: 1.5
See Also:: PSSParameterSpec, OAEPParameterSpec

Field Summary

Fields
Modifier and Type	Field	Description
`static MGF1ParameterSpec`	`SHA1`	The MGF1ParameterSpec which uses "SHA-1" message digest
`static MGF1ParameterSpec`	`SHA224`	The MGF1ParameterSpec which uses "SHA-224" 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
`static MGF1ParameterSpec`	`SHA512_224`	The MGF1ParameterSpec which uses SHA-512/224 message digest
`static MGF1ParameterSpec`	`SHA512_256`	The MGF1ParameterSpec which uses SHA-512/256 message digest

Constructor Summary

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

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getDigestAlgorithm()`	Returns the algorithm name of the message digest used by the mask generation function.

Methods declared in 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

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

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.