MGF1ParameterSpec (Java Platform SE 6)

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Java™ Platform
Standard Ed. 6

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java.security.spec
Class MGF1ParameterSpec

java.lang.Object
 extended by java.security.spec.MGF1ParameterSpec

All Implemented Interfaces:: AlgorithmParameterSpec

public class MGF1ParameterSpec
extends Object
implements AlgorithmParameterSpec
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.