# Uses of Class
javax.crypto.ExemptionMechanismException

Packages that use ExemptionMechanismException
Package | Description
--- | ---
javax.crypto | Provides the classes and interfaces for cryptographic operations.

## Uses of ExemptionMechanismException in javax.crypto

Methods in javax.crypto that throw ExemptionMechanismException
Modifier and Type | Method | Description
--- | --- | ---
`protected abstract byte[]` | ExemptionMechanismSpi.`engineGenExemptionBlob()` | Generates the exemption mechanism key blob.
`protected abstract int` | ExemptionMechanismSpi.`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 void` | ExemptionMechanismSpi.`engineInit​(Key key)` | Initializes this exemption mechanism with a key.
`protected abstract void` | ExemptionMechanismSpi.`engineInit​(Key key, AlgorithmParameters params)` | Initializes this exemption mechanism with a key and a set of algorithm parameters.
`protected abstract void` | ExemptionMechanismSpi.`engineInit​(Key key, AlgorithmParameterSpec params)` | Initializes this exemption mechanism with a key and a set of algorithm parameters.
`byte[]` | ExemptionMechanism.`genExemptionBlob()` | Generates the exemption mechanism key blob.
`int` | ExemptionMechanism.`genExemptionBlob​(byte[] output)` | Generates the exemption mechanism key blob, and stores the result in the `output` buffer.
`int` | ExemptionMechanism.`genExemptionBlob​(byte[] output, int outputOffset)` | Generates the exemption mechanism key blob, and stores the result in the `output` buffer, starting at `outputOffset` inclusive.
`void` | ExemptionMechanism.`init​(Key key)` | Initializes this exemption mechanism with a key.
`void` | ExemptionMechanism.`init​(Key key, AlgorithmParameters params)` | Initializes this exemption mechanism with a key and a set of algorithm parameters.
`void` | ExemptionMechanism.`init​(Key key, AlgorithmParameterSpec params)` | Initializes this exemption mechanism with a key and a set of algorithm parameters.
`boolean` | ExemptionMechanism.`isCryptoAllowed​(Key key)` | Returns whether the result blob has been generated successfully by this exemption mechanism.