MGF1ParameterSpec (Java Platform SE 7 b138)

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

Fields
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 Summary

Constructors
Constructor and Description

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

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

Method Summary

Methods
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

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

- 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.

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DRAFT ea-b138

Class MGF1ParameterSpec

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SHA1

SHA256

SHA384

SHA512

Constructor Detail

MGF1ParameterSpec

Method Detail

getDigestAlgorithm