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Java™ Platform Standard Ed. 6 |
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java.lang.Object java.security.AlgorithmParametersSpi
public abstract class AlgorithmParametersSpi
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.
AlgorithmParameters
,
AlgorithmParameterSpec
,
DSAParameterSpec
Constructor Summary | |
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AlgorithmParametersSpi()
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Method Summary | ||
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protected abstract byte[] |
engineGetEncoded()
Returns the parameters in their primary encoding format. |
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protected abstract byte[] |
engineGetEncoded(String format)
Returns the parameters encoded in the specified format. |
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protected abstract
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engineGetParameterSpec(Class<T> paramSpec)
Returns a (transparent) specification of this parameters object. |
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protected abstract void |
engineInit(AlgorithmParameterSpec paramSpec)
Initializes this parameters object using the parameters specified in paramSpec . |
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protected abstract void |
engineInit(byte[] params)
Imports the specified parameters and decodes them according to the primary decoding format for parameters. |
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protected abstract void |
engineInit(byte[] params,
String format)
Imports the parameters from params and
decodes them according to the specified decoding format. |
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protected abstract String |
engineToString()
Returns a formatted string describing the parameters. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public AlgorithmParametersSpi()
Method Detail |
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protected abstract void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException
paramSpec
.
paramSpec
- the parameter specification.
InvalidParameterSpecException
- if the given parameter
specification is inappropriate for the initialization of this parameter
object.protected abstract void engineInit(byte[] params) throws IOException
params
- the encoded parameters.
IOException
- on decoding errorsprotected abstract void engineInit(byte[] params, String format) throws IOException
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.
params
- the encoded parameters.format
- the name of the decoding format.
IOException
- on decoding errorsprotected abstract <T extends AlgorithmParameterSpec> T engineGetParameterSpec(Class<T> paramSpec) throws InvalidParameterSpecException
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.
paramSpec
- the the specification class in which
the parameters should be returned.
InvalidParameterSpecException
- if the requested parameter
specification is inappropriate for this parameter object.protected abstract byte[] engineGetEncoded() throws IOException
IOException
- on encoding errors.protected abstract byte[] engineGetEncoded(String format) throws IOException
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.
format
- the name of the encoding format.
IOException
- on encoding errors.protected abstract String engineToString()
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Java™ Platform Standard Ed. 6 |
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