Implements abstract java.security.SignatureSpi.engineGetParameter.

Doc from java.security.SignatureSpi.engineGetParameter.

Gets the value of the specified algorithm parameter. This method supplies a general-purpose mechanism through which it is possible to get the various parameters of this object. A parameter may be any settable parameter for the algorithm, such as a parameter size, or a source of random bits for signature generation (if appropriate), or an indication of whether to perform a specific but optional computation. A uniform algorithm-specific naming scheme for each parameter is desirable but left unspecified at this time.

Annotations

@Deprecated

@Override

Exceptions

InvalidParameterException:

if param is an invalid parameter for this engine, or another exception occurs while trying to get this parameter.

Overrides java.security.SignatureSpi.engineGetParameters.

Doc from java.security.SignatureSpi.engineGetParameters.

Returns the parameters used with this Signature object.

The returned parameters may be the same that were used to initialize this Signature object, or may contain additional default or random parameter values used by the underlying signature scheme. If the required parameters were not supplied and can be generated by the Signature object, the generated parameters are returned; otherwise null is returned.

However, if the signature scheme does not support returning the parameters as AlgorithmParameters, null is always returned.

Annotations

@Override

Implements abstract java.security.SignatureSpi.engineInitSign.

Doc from java.security.SignatureSpi.engineInitSign.

Initializes this Signature object with the specified private key for signing operations.

Annotations

@Override

Exceptions

InvalidKeyException:

if the key is improperly encoded, parameters are missing, and so on.

Overrides java.security.SignatureSpi.engineInitSign.

Doc from java.security.SignatureSpi.engineInitSign.

Initializes this Signature object with the specified private key and source of randomness for signing operations.

This concrete method has been added to this previously-defined abstract class. (For backwards compatibility, it cannot be abstract.)

Annotations

@Override

Exceptions

InvalidKeyException:

if the key is improperly encoded, parameters are missing, and so on.

Implements abstract java.security.SignatureSpi.engineInitVerify.

Doc from java.security.SignatureSpi.engineInitVerify.

Initializes this Signature object with the specified public key for verification operations.

Annotations

@Override

Exceptions

InvalidKeyException:

if the key is improperly encoded, parameters are missing, and so on.

Implements abstract java.security.SignatureSpi.engineSetParameter.

Doc from java.security.SignatureSpi.engineSetParameter.

Sets the specified algorithm parameter to the specified value. This method supplies a general-purpose mechanism through which it is possible to set the various parameters of this object. A parameter may be any settable parameter for the algorithm, such as a parameter size, or a source of random bits for signature generation (if appropriate), or an indication of whether to perform a specific but optional computation. A uniform algorithm-specific naming scheme for each parameter is desirable but left unspecified at this time.

Annotations

@Deprecated

@Override

Exceptions

InvalidParameterException:

if param is an invalid parameter for this Signature object, the parameter is already set and cannot be set again, a security exception occurs, and so on.

Overrides java.security.SignatureSpi.engineSetParameter.

Doc from java.security.SignatureSpi.engineSetParameter.

Initializes this Signature object with the specified parameter values.

Annotations

@Override

Exceptions

InvalidAlgorithmParameterException:

if this method is overridden by a provider and the given parameters are inappropriate for this Signature object

Implements abstract java.security.SignatureSpi.engineSign.

Doc from java.security.SignatureSpi.engineSign.

Returns the signature bytes of all the data updated so far. The format of the signature depends on the underlying signature scheme.

Annotations

@Override

Exceptions

SignatureException:

if the engine is not initialized properly or if this signature algorithm is unable to process the input data provided.

Implements abstract java.security.SignatureSpi.engineUpdate.

Doc from java.security.SignatureSpi.engineUpdate.

Updates the data to be signed or verified using the specified byte.

Annotations

@Override

Exceptions

SignatureException:

if the engine is not initialized properly.

Implements abstract java.security.SignatureSpi.engineUpdate.

Doc from java.security.SignatureSpi.engineUpdate.

Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.

Annotations

@Override

Exceptions

SignatureException:

if the engine is not initialized properly

Implements abstract java.security.SignatureSpi.engineVerify.

Doc from java.security.SignatureSpi.engineVerify.

Verifies the passed-in signature.

Annotations

@Override

Exceptions

SignatureException:

if the engine is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.