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AlgorithmParametersSpi.javaAPI DocJava SE 5 API4516Fri Aug 26 14:57:14 BST 2005java.security

AlgorithmParametersSpi

public abstract class AlgorithmParametersSpi extends Object
This class defines the Service Provider Interface (SPI) for the AlgorithmParameters class, which is used to manage algorithm parameters.

All the abstract methods in this class must be implemented by each cryptographic service provider who wishes to supply parameter management for a particular algorithm.

author
Jan Luehe
version
1.12, 05/05/04
see
AlgorithmParameters
see
java.security.spec.AlgorithmParameterSpec
see
java.security.spec.DSAParameterSpec
since
1.2

Fields Summary
Constructors Summary
Methods Summary
protected abstract byte[]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.

return
the parameters encoded using the specified encoding scheme.
exception
IOException on encoding errors.

protected abstract byte[]engineGetEncoded(java.lang.String format)
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.

param
format the name of the encoding format.
return
the parameters encoded using the specified encoding scheme.
exception
IOException on encoding errors.

protected abstract TengineGetParameterSpec(java.lang.Class paramSpec)
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.

param
paramSpec the the specification class in which the parameters should be returned.
return
the parameter specification.
exception
InvalidParameterSpecException if the requested parameter specification is inappropriate for this parameter object.

protected abstract voidengineInit(java.security.spec.AlgorithmParameterSpec paramSpec)
Initializes this parameters object using the parameters specified in paramSpec.

param
paramSpec the parameter specification.
exception
InvalidParameterSpecException if the given parameter specification is inappropriate for the initialization of this parameter object.

protected abstract voidengineInit(byte[] params)
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.

param
params the encoded parameters.
exception
IOException on decoding errors

protected abstract voidengineInit(byte[] params, java.lang.String format)
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.

param
params the encoded parameters.
param
format the name of the decoding format.
exception
IOException on decoding errors

protected abstract java.lang.StringengineToString()
Returns a formatted string describing the parameters.

return
a formatted string describing the parameters.