Class ChaChaAlgorithm

java.lang.Object

zeroecho.core.CryptoAlgorithm

zeroecho.core.alg.AbstractCryptoAlgorithm

zeroecho.core.alg.chacha.ChaChaAlgorithm

public final class ChaChaAlgorithm
extends AbstractCryptoAlgorithm

ChaCha20 (stream) algorithm

Registers the ChaCha20 stream cipher within the ZeroEcho framework. Extends AbstractChaChaAlgorithm and installs symmetric capabilities for encryption and decryption using ChaChaSpec, with convenience defaults for VoidSpec.

Capabilities

• Encrypt
  • Family: AlgorithmFamily.SYMMETRIC
  • Usage: KeyUsage.ENCRYPT
  • Context: EncryptionContext
  • Key: SecretKey
  • Spec: ChaChaSpec (or VoidSpec default)
• Decrypt
  • Family: AlgorithmFamily.SYMMETRIC
  • Usage: KeyUsage.DECRYPT
  • Context: EncryptionContext
  • Key: SecretKey
  • Spec: ChaChaSpec (or VoidSpec default)

Defaults

When used with VoidSpec, a minimal ChaChaSpec is synthesized with initialCounter(1) and no header.

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
ChaChaAlgorithm()	Creates and registers the ChaCha20 stream cipher, declaring encryption and decryption capabilities for ChaChaSpec and VoidSpec.

Method Summary

Modifier and Type	Method	Description
List<ParameterSetDescriptor<? extends AlgorithmKeySpec>>	parameterSets()	Returns the discoverable parameter sets (or parameterized templates) supported by this algorithm.

Methods inherited from class AbstractCryptoAlgorithm

capability

Methods inherited from class CryptoAlgorithm

addCapability, asymmetricKeyPairGenerator, bindContext, createContext, displayName, id, keyOperations, listCapabilities, priority, privateKeyImporter, providerName, publicKeyImporter, registerAsymmetricKeyPairGenerator, registerPrivateKeyImporter, registerPublicKeyImporter, registerSymmetricKeyGenerator, registerSymmetricKeyImporter, requiresStatefulSigning, roles, supports, symmetricKeyGenerator, symmetricKeyImporter

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ChaChaAlgorithm

public ChaChaAlgorithm()

Creates and registers the ChaCha20 stream cipher, declaring encryption and decryption capabilities for ChaChaSpec and VoidSpec.

Method Details

parameterSets

public List<ParameterSetDescriptor<? extends AlgorithmKeySpec>> parameterSets()

Description copied from class: CryptoAlgorithm

Returns the discoverable parameter sets (or parameterized templates) supported by this algorithm.

Callers (UIs, provisioning tools, policy engines) use this list to present users with valid, named key-generation options without prior knowledge of the concrete algorithm. Each entry is either a pre-built ParameterSetDescriptor.Concrete (ready spec) or a ParameterSetDescriptor.Template (user-supplied arguments produce the spec).

The default implementation returns an empty list. Algorithms with finite, enumerable parameter sets should override this method. Overrides must return immutable lists in stable order, with unique nonblank descriptor identifiers. Registry loading validates a snapshot; external providers remain responsible for maintaining the contract on subsequent calls. Implementations may use ParameterSetDescriptor.snapshot(List) to validate and copy their list.

Overrides:

parameterSets in class CryptoAlgorithm

Returns:

immutable list of parameter set descriptors; never null