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sun.security.rsa

public final Class PSSParameters

extends AlgorithmParametersSpi
Class Inheritance
Imports
java.io.*, sun.security.util.*, sun.security.x509.*, java.security.AlgorithmParametersSpi, .NoSuchAlgorithmException, java.security.spec.AlgorithmParameterSpec, .InvalidParameterSpecException, .MGF1ParameterSpec, .PSSParameterSpec
This class implements the PSS parameters used with the RSA signatures in PSS padding. Here is its ASN.1 definition: RSASSA-PSS-params ::= SEQUENCE { hashAlgorithm [0] HashAlgorithm DEFAULT sha1, maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1, saltLength [2] INTEGER DEFAULT 20 trailerField [3] TrailerField DEFAULT trailerFieldBC }
Author
Valerie Peng

Field Summary

Modifier and TypeField and Description
private PSSParameterSpec
spec

Constructor Summary

AccessConstructor and Description
public
PSSParameters()

Method Summary

Modifier and TypeMethod and Description
protected byte[]
engineGetEncoded()

Implements abstract java.security.AlgorithmParametersSpi.engineGetEncoded.

Returns the parameters in their primary encoding format.

protected byte[]
engineGetEncoded(String encMethod)

Implements abstract java.security.AlgorithmParametersSpi.engineGetEncoded.

Returns the parameters encoded in the specified format.

protected <T extends AlgorithmParameterSpec> T
engineGetParameterSpec(Class<T> paramSpec)

Implements abstract java.security.AlgorithmParametersSpi.engineGetParameterSpec.

Returns a (transparent) specification of this parameters object.

protected void
engineInit(AlgorithmParameterSpec paramSpec)

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Initializes this parameters object using the parameters specified in paramSpec.

protected void
engineInit(byte[] encoded)

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Imports the specified parameters and decodes them according to the primary decoding format for parameters.

protected void
engineInit(byte[] encoded, String decodingMethod)

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Imports the parameters from params and decodes them according to the specified decoding format.

protected String
engineToString()

Implements abstract java.security.AlgorithmParametersSpi.engineToString.

Returns a formatted string describing the parameters.

public static byte[]

Returns:

its DER encoding
getEncoded(PSSParameterSpec
a PSSParameterSpec object
spec)

Returns the encoding of a PSSParameterSpec object.

Field Detail

specback to summary
private PSSParameterSpec spec

Constructor Detail

PSSParametersback to summary
public PSSParameters()

Method Detail

engineGetEncodedback to summary
protected byte[] engineGetEncoded() throws IOException

Implements abstract java.security.AlgorithmParametersSpi.engineGetEncoded.

Doc from java.security.AlgorithmParametersSpi.engineGetEncoded.

Returns the parameters in their primary encoding format. The primary encoding format for parameters is ASN.1, if an ASN.1 specification for this type of parameters exists.

Annotations
@Override
Exceptions
IOException:
on encoding errors.
engineGetEncodedback to summary
protected byte[] engineGetEncoded(String encMethod) throws IOException

Implements abstract java.security.AlgorithmParametersSpi.engineGetEncoded.

Doc from java.security.AlgorithmParametersSpi.engineGetEncoded.

Returns the parameters encoded in the specified format. If format is null, the primary encoding format for parameters is used. The primary encoding format is ASN.1, if an ASN.1 specification for these parameters exists.

Annotations
@Override
Exceptions
IOException:
on encoding errors.
engineGetParameterSpecback to summary
protected <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> paramSpec) throws InvalidParameterSpecException

Implements abstract java.security.AlgorithmParametersSpi.engineGetParameterSpec.

Doc from java.security.AlgorithmParametersSpi.engineGetParameterSpec.

Returns a (transparent) specification of this parameters object. paramSpec identifies the specification class in which the parameters should be returned. It could, for example, be DSAParameterSpec.class, to indicate that the parameters should be returned in an instance of the DSAParameterSpec class.

Annotations
@Override
Exceptions
InvalidParameterSpecException:
if the requested parameter specification is inappropriate for this parameter object.
engineInitback to summary
protected void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Doc from java.security.AlgorithmParametersSpi.engineInit.

Initializes this parameters object using the parameters specified in paramSpec.

Annotations
@Override
Exceptions
InvalidParameterSpecException:
if the given parameter specification is inappropriate for the initialization of this parameter object.
engineInitback to summary
protected void engineInit(byte[] encoded) throws IOException

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Doc from java.security.AlgorithmParametersSpi.engineInit.

Imports the specified parameters and decodes them according to the primary decoding format for parameters. The primary decoding format for parameters is ASN.1, if an ASN.1 specification for this type of parameters exists.

Annotations
@Override
Exceptions
IOException:
on decoding errors
engineInitback to summary
protected void engineInit(byte[] encoded, String decodingMethod) throws IOException

Implements abstract java.security.AlgorithmParametersSpi.engineInit.

Doc from java.security.AlgorithmParametersSpi.engineInit.

Imports the parameters from params and decodes them according to the specified decoding format. If format is null, the primary decoding format for parameters is used. The primary decoding format is ASN.1, if an ASN.1 specification for these parameters exists.

Annotations
@Override
Exceptions
IOException:
on decoding errors
engineToStringback to summary
protected String engineToString()

Implements abstract java.security.AlgorithmParametersSpi.engineToString.

Doc from java.security.AlgorithmParametersSpi.engineToString.

Returns a formatted string describing the parameters.

Annotations
@Override
getEncodedback to summary
public static byte[] getEncoded(PSSParameterSpec spec) throws IOException

Returns the encoding of a PSSParameterSpec object. This method is used in this class and AlgorithmId.

Parameters
spec:PSSParameterSpec

a PSSParameterSpec object

Returns:byte[]

its DER encoding

Exceptions
IOException:
if the name of a MessageDigest or MaskGenAlgorithm is unsupported