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

External Specifications

• RFC 8017: PKCS #1: RSA Cryptography Specifications Version 2.2

See Also:

• PSSParameterSpec
• OAEPParameterSpec

Field Summary

Fields

Modifier and Type	Field	Description
static final MGF1ParameterSpec	SHA1	The MGF1ParameterSpec uses a "SHA-1" message digest.
static final MGF1ParameterSpec	SHA224	The MGF1ParameterSpec uses a "SHA-224" message digest.
static final MGF1ParameterSpec	SHA256	The MGF1ParameterSpec uses a "SHA-256" message digest.
static final MGF1ParameterSpec	SHA3_224	The MGF1ParameterSpec uses a "SHA3-224" message digest.
static final MGF1ParameterSpec	SHA3_256	The MGF1ParameterSpec uses a "SHA3-256" message digest.
static final MGF1ParameterSpec	SHA3_384	The MGF1ParameterSpec uses a "SHA3-384" message digest.
static final MGF1ParameterSpec	SHA3_512	The MGF1ParameterSpec uses a "SHA3-512" message digest.
static final MGF1ParameterSpec	SHA384	The MGF1ParameterSpec uses a "SHA-384" message digest.
static final MGF1ParameterSpec	SHA512	The MGF1ParameterSpec uses a "SHA-512" message digest.
static final MGF1ParameterSpec	SHA512_224	The MGF1ParameterSpec uses a "SHA-512/224" message digest.
static final MGF1ParameterSpec	SHA512_256	The MGF1ParameterSpec uses a "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

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 Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Modifier and Type	Method	Description
protected Object	clone()	Answers a new instance of the same class as the receiver, whose slots have been filled in with the values in the slots of the receiver.
boolean	equals(Object o)	Compares the argument to the receiver, and answers true if they represent the same object using a class specific comparison.
protected void	finalize()	Deprecated, for removal: This API element is subject to removal in a future version. May cause performance issues, deadlocks and hangs.
final Class<? extends Object>	getClass()	Answers the unique instance of java.lang.Class which represents the class of the receiver.
int	hashCode()	Answers an integer hash code for the receiver.
final void	notify()	Causes one thread which is waiting on the receiver to be made ready to run.
final void	notifyAll()	Causes all threads which are waiting on the receiver to be made ready to run.
String	toString()	Answers a string containing a concise, human-readable description of the receiver.
final void	wait()	Causes the thread which sent this message to be made not ready to run pending some change in the receiver (as indicated by notify or notifyAll).
final void	wait(long time)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.
final void	wait(long time, int frac)	Causes the thread which sent this message to be made not ready to run either pending some change in the receiver (as indicated by notify or notifyAll) or the expiration of the timeout.

Field Details

SHA1

public static final MGF1ParameterSpec SHA1

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

SHA224

public static final MGF1ParameterSpec SHA224

The MGF1ParameterSpec uses a "SHA-224" message digest.

SHA256

public static final MGF1ParameterSpec SHA256

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

SHA384

public static final MGF1ParameterSpec SHA384

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

SHA512

public static final MGF1ParameterSpec SHA512

The MGF1ParameterSpec uses a "SHA-512" message digest.

SHA512_224

public static final MGF1ParameterSpec SHA512_224

The MGF1ParameterSpec uses a "SHA-512/224" message digest.

Since:

11

SHA512_256

public static final MGF1ParameterSpec SHA512_256

The MGF1ParameterSpec uses a "SHA-512/256" message digest.

Since:

11

SHA3_224

public static final MGF1ParameterSpec SHA3_224

The MGF1ParameterSpec uses a "SHA3-224" message digest.

Since:

16

SHA3_256

public static final MGF1ParameterSpec SHA3_256

The MGF1ParameterSpec uses a "SHA3-256" message digest.

Since:

16

SHA3_384

public static final MGF1ParameterSpec SHA3_384

The MGF1ParameterSpec uses a "SHA3-384" message digest.

Since:

16

SHA3_512

public static final MGF1ParameterSpec SHA3_512

The MGF1ParameterSpec uses a "SHA3-512" message digest.

Since:

16

Constructor Details

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 Details

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.