iaik.pkcs.pkcs1
Class RSASSAPkcs1v15Parameters

java.lang.Object
  |
  +--java.security.AlgorithmParametersSpi
        |
        +--iaik.pkcs.pkcs1.PKCS1AlgorithmParameters
              |
              +--iaik.pkcs.pkcs1.RSASSAPkcs1v15Parameters

public class RSASSAPkcs1v15Parameters

extends PKCS1AlgorithmParameters

Algorithm parameters for the RSASSA-PKCS1-v1_5 signature schemes.

Only may be used for raw RSA PKCS#1v1.5 signatures to specify the hash algorithm used by the signature engine.

Version:

File Revision 9

Constructor Summary

RSASSAPkcs1v15Parameters()
The default constructor.

Method Summary

void	decode(ASN1Object asn1Params) Initializes this RSASSAPkcs1v15Parameters object from the given ASN1Object.
protected byte[]	engineGetEncoded() Returns the parameters as DER byte array.
protected byte[]	engineGetEncoded(String format) Returns the parameters as a DER byte array.
protected AlgorithmParameterSpec	engineGetParameterSpec(Class paramSpec) Returns the RSASSAPkcs1v15 parameters as transparent parameter specification of the given class type.
protected void	engineInit(AlgorithmParameterSpec paramSpec) Initializes this RSASSAPkcs1v15Parameters from the given RSASSAPkcs1v15ParameterSpec.
protected void	engineInit(byte[] params) Initializes this RSASSAPkcs1v15Parameters object from the given DER encoded byte array.
protected void	engineInit(byte[] params, String format) Inits the parameters from an DER encoded byte array.
protected String	engineToString() Returns a String representation of this object.
ASN1Object	toASN1Object() Gets an ASN.1 representation of this RSA-SSA PKCS1v1.5 parameters.

Methods inherited from class java.lang.Object

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

Constructor Detail

RSASSAPkcs1v15Parameters

public RSASSAPkcs1v15Parameters()

The default constructor. Only internally used for creating a RSASSAPkcs1v15Parameters object. Applications shall use one of the AlgorithmParameters.getInstance factory methods for obtaining RSASSAPkcs1v15Parameters.

Method Detail

engineGetEncoded

protected byte[] engineGetEncoded()
                           throws IOException

Returns the parameters as DER byte array.

Overrides:

engineGetEncoded in class AlgorithmParametersSpi

Returns:

the DER encoded hash algorithm id

Throws:

IOException - if an encoding error occurs

engineGetEncoded

protected byte[] engineGetEncoded(String format)
                           throws IOException

Returns the parameters as a DER byte array.

Format is ignored. Only DER encoding is supported at this time. This method only calls engineGetEncoded(), regardless of what is specified in the format string.

Overrides:

engineGetEncoded in class AlgorithmParametersSpi

Parameters:

format - the encoding format; ignored

Returns:

the DER encoded hash algorithm id

Throws:

IOException - if an encoding error occurs

toASN1Object

public ASN1Object toASN1Object()

Gets an ASN.1 representation of this RSA-SSA PKCS1v1.5 parameters.

Returns:

the RSA-SSA PKCS1v1.5 parameter (hash algorithm id) as ASN1Object

engineGetParameterSpec

protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
                                                 throws InvalidParameterSpecException

Returns the RSASSAPkcs1v15 parameters as transparent parameter specification of the given class type.

Overrides:

engineGetParameterSpec in class AlgorithmParametersSpi

Parameters:

paramSpec - the desired parameter specification class (RSASSAPkcs1v15ParameterSpec)

Returns:

the parameters as RSASSAPkcs1v15ParameterSpec

Throws:

InvalidParameterSpecException - if the paramters cannot be converted to the desired parameter specification

engineInit

protected void engineInit(AlgorithmParameterSpec paramSpec)
                   throws InvalidParameterSpecException

Initializes this RSASSAPkcs1v15Parameters from the given RSASSAPkcs1v15ParameterSpec.

Overrides:

engineInit in class AlgorithmParametersSpi

Parameters:

paramSpec - the parameter specification, which has to be a RSASSAPkcs1v15ParameterSpec

Throws:

InvalidParameterSpecException - if the given parameter specification is not a or is an invalid RSASSAPkcs1v15ParameterSpec

engineInit

protected void engineInit(byte[] params)
                   throws IOException

Initializes this RSASSAPkcs1v15Parameters object from the given DER encoded byte array.

Overrides:

engineInit in class AlgorithmParametersSpi

Parameters:

params - the DER encoded byte array

Throws:

IOException - if an error occurs when decoding the given byte array

decode

public void decode(ASN1Object asn1Params)
            throws CodingException

Initializes this RSASSAPkcs1v15Parameters object from the given ASN1Object.

Parameters:

params - the RSA-SSA PKCS1v1.5 parameters in ASN.1 representation

Throws:

CodingException - if an error occurs when parsing the parameters

engineInit

protected void engineInit(byte[] params,
                          String format)
                   throws IOException

Inits the parameters from an DER encoded byte array. Format is ignored. Only calls {engineInit(params) for initializing this RSASSAPkcs1v15Parameters object from the given DER encoded byte array, regardless of what is specified in the format string.

Overrides:

engineInit in class AlgorithmParametersSpi

Parameters:

params - the DER encoded byte array

format - the encoding format; ignored

Throws:

IOException - if an error occurs when decoding the given byte array

engineToString

protected String engineToString()

Returns a String representation of this object.

Overrides:

engineToString in class AlgorithmParametersSpi

Returns:

a String representation this object