de.flexiprovider.core.rsa
Class RSAOAEPParameters

java.lang.Object
  |
  +--java.security.AlgorithmParametersSpi
        |
        +--de.flexiprovider.api.parameters.AlgorithmParameters
              |
              +--de.flexiprovider.core.rsa.RSAOAEPParameters

public class RSAOAEPParameters

extends AlgorithmParameters

This class provides ASN.1 encoding and decoding of parameters for RSA-OAEP (specified by RSAOAEPParameterSpec).

Author:

Martin Döring

Constructor Summary

RSAOAEPParameters()

Method Summary

byte[]	getEncoded() Encode the parameters according to the primary encoding format (ASN.1).
byte[]	getEncoded(java.lang.String format) Encode the parameters according to the specified encoding format.
AlgorithmParameterSpec	getParameterSpec(java.lang.Class paramSpec) Return a transparent specification of the parameters.
void	init(AlgorithmParameterSpec paramSpec) Initialize the parameters with the given parameter specification.
void	init(byte[] encParams) Import the given encoded parameters and decode them according to the primary encoding format (ASN.1).
void	init(byte[] encParams, java.lang.String format) Import the given encoded parameters and decode them according to the specified encoding format.
java.lang.String	toString()

Methods inherited from class de.flexiprovider.api.parameters.AlgorithmParameters

engineGetEncoded, engineGetEncoded, engineGetParameterSpec, engineInit, engineInit, engineInit, engineToString

Methods inherited from class java.lang.Object

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

Constructor Detail

RSAOAEPParameters

public RSAOAEPParameters()

Method Detail

init

public void init(AlgorithmParameterSpec paramSpec)
          throws InvalidParameterSpecException

Initialize the parameters with the given parameter specification. Currently, only parameter specifications of type RSAOAEPParameterSpec are supported.

Overrides:

init in class AlgorithmParameters

Parameters:

paramSpec - the parameter specification

Throws:

InvalidParameterSpecException - if the parameter specification is null or nor an instance of RSAOAEPParameterSpec.

init

public void init(byte[] encParams)
          throws java.io.IOException

Import the given encoded parameters and decode them according to the primary encoding format (ASN.1).

Overrides:

init in class AlgorithmParameters

Parameters:

encParams - the encoded parameters

Throws:

java.io.IOException - on decoding errors.

init

public void init(byte[] encParams,
                 java.lang.String format)
          throws java.io.IOException

Import the given encoded parameters and decode them according to the specified encoding format. Currently, only the primary encoding format (ASN.1) is supported.

Overrides:

init in class AlgorithmParameters

Parameters:

encParams - the encoded parameters

format - the encoding format

Throws:

java.io.IOException - on decoding errors or if the encoding format is null or not equals to "ASN.1".

getEncoded

public byte[] getEncoded()
                  throws java.io.IOException

Encode the parameters according to the primary encoding format (ASN.1).

The ASN.1 definition of the parameters structure is

 RSAES-OAEP-params ::= SEQUENCE {
   md       AlgorithmIdentifier,
   mgf      AlgorithmIdentifier,
   pSource  AlgorithmIdentifier,
 }
 

Overrides:

getEncoded in class AlgorithmParameters

Returns:

the encoded parameters

Throws:

java.io.IOException - on encoding errors.

getEncoded

public byte[] getEncoded(java.lang.String format)
                  throws java.io.IOException

Encode the parameters according to the specified encoding format. Currently, only the primary encoding format (ASN.1) is supported.

Overrides:

getEncoded in class AlgorithmParameters

Parameters:

format - the encoding format

Returns:

the encoded parameters

Throws:

java.io.IOException - on encoding errors or if the encoding format is null or not equals to "ASN.1".

getParameterSpec

public AlgorithmParameterSpec getParameterSpec(java.lang.Class paramSpec)
                                        throws InvalidParameterSpecException

Return a transparent specification of the parameters. Currently, only RSAOAEPParameterSpec is supported as parameter specification type.

Overrides:

getParameterSpec in class AlgorithmParameters

Parameters:

paramSpec - the desired parameter specification type

Returns:

the parameter specification

Throws:

InvalidParameterSpecException - if the parameter specification type is null or not assignable from RSAOAEPParameterSpec.

toString

public java.lang.String toString()

Overrides:

toString in class AlgorithmParameters

Returns:

a human readable form of the parameters