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java.lang.Object | +--javax.crypto.ExemptionMechanismSpi
Constructor Summary | |
ExemptionMechanismSpi()
|
Method Summary | |
protected abstract byte[] |
engineGenExemptionBlob()
Generates the exemption mechanism key blob. |
protected abstract int |
engineGenExemptionBlob(byte[] output,
int outputOffset)
Generates the exemption mechanism key blob, and stores the result in the output buffer, starting at outputOffset
inclusive. |
protected abstract int |
engineGetOutputSize(int inputLen)
Returns the length in bytes that an output buffer would need to be in order to hold the result of the next engineGenExemptionBlob operation, given the input length inputLen (in bytes). |
protected abstract void |
engineInit(Key key)
Initializes this exemption mechanism with a key. |
protected abstract void |
engineInit(Key key,
AlgorithmParameters params)
Initializes this exemption mechanism with a key and a set of algorithm parameters. |
protected abstract void |
engineInit(Key key,
AlgorithmParameterSpec params)
Initializes this exemption mechanism with a key and a set of algorithm parameters. |
Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
Constructor Detail |
public ExemptionMechanismSpi()
Method Detail |
protected abstract int engineGetOutputSize(int inputLen)
inputLen
(in bytes).
The actual output length of the next engineGenExemptionBlob call may be smaller than the length returned by this method.
inputLen
- the input length (in bytes)protected abstract void engineInit(Key key) throws InvalidKeyException, ExemptionMechanismException
If this exemption mechanism requires any algorithm parameters
that cannot be derived from the given key
, the underlying
exemption mechanism implementation is supposed to generate the required
parameters itself (using provider-specific default values); in the case
that algorithm parameters must be specified by the caller, an
InvalidKeyException
is raised.
key
- the key for this exemption mechanismprotected abstract void engineInit(Key key, AlgorithmParameterSpec params) throws InvalidKeyException, InvalidAlgorithmParameterException, ExemptionMechanismException
If this exemption mechanism requires any algorithm parameters and
params
is null, the underlying exemption mechanism
implementation is supposed to generate the required parameters
itself (using provider-specific default values); in the case that
algorithm parameters must be specified by the caller, an
InvalidAlgorithmParameterException
is raised.
key
- the key for this exemption mechanismparams
- the algorithm parametersprotected abstract void engineInit(Key key, AlgorithmParameters params) throws InvalidKeyException, InvalidAlgorithmParameterException, ExemptionMechanismException
If this exemption mechanism requires any algorithm parameters
and params
is null, the underlying exemption mechanism
implementation is supposed to generate the required parameters
itself (using provider-specific default values); in the case that
algorithm parameters must be specified by the caller, an
InvalidAlgorithmParameterException
is raised.
key
- the key for this exemption mechanismparams
- the algorithm parametersprotected abstract byte[] engineGenExemptionBlob() throws ExemptionMechanismException
protected abstract int engineGenExemptionBlob(byte[] output, int outputOffset) throws ShortBufferException, ExemptionMechanismException
output
buffer, starting at outputOffset
inclusive.
If the output
buffer is too small to hold the result,
a ShortBufferException
is thrown. In this case, repeat this
call with a larger output buffer. Use
engineGetOutputSize to determine
how big the output buffer should be.
output
- the buffer for the resultoutputOffset
- the offset in output
where the result
is storedoutput
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