Class ChaCha20Poly1305Algorithm

java.lang.Object

zeroecho.core.CryptoAlgorithm

zeroecho.core.alg.AbstractCryptoAlgorithm

zeroecho.core.alg.chacha.ChaCha20Poly1305Algorithm

public final class ChaCha20Poly1305Algorithm
extends AbstractCryptoAlgorithm

ChaCha20-Poly1305 (AEAD) algorithm

Registers the ChaCha20-Poly1305 AEAD cipher within the ZeroEcho framework. Extends AbstractChaChaAlgorithm and declares symmetric capabilities for encryption and decryption using either ChaCha20Poly1305Spec or VoidSpec (convenience default mirroring AES-GCM).

Capabilities

• Encrypt:
  • Family: AlgorithmFamily.SYMMETRIC
  • Usage: KeyUsage.ENCRYPT
  • Context: EncryptionContext
  • Key: SecretKey
  • Spec: ChaCha20Poly1305Spec (or VoidSpec default)
• Decrypt:
  • Family: AlgorithmFamily.SYMMETRIC
  • Usage: KeyUsage.DECRYPT
  • Context: EncryptionContext
  • Key: SecretKey
  • Spec: ChaCha20Poly1305Spec (or VoidSpec default)

Defaults

When used with VoidSpec, a minimal ChaCha20Poly1305Spec is synthesized with no SymmetricHeaderCodec header. Nonces are 12 bytes and managed by the corresponding cipher context.

Example

ZeroEchoSession session = new ZeroEchoSession();
SecretKey key = session.keyBuilders().symmetric()
                       .generate("CHACHA20-POLY1305", ChaChaKeyGenSpec.chacha256());

// Encrypt with explicit spec
ChaCha20Poly1305Spec spec = ChaCha20Poly1305Spec.builder().header(null).build();
EncryptionContext enc = session.createContext(
    "CHACHA20-POLY1305", zeroecho.core.KeyUsage.ENCRYPT, key, spec);

// Decrypt using VoidSpec default
EncryptionContext dec = session.createContext(
    "CHACHA20-POLY1305", zeroecho.core.KeyUsage.DECRYPT, key,
    zeroecho.core.spec.VoidSpec.INSTANCE);

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
ChaCha20Poly1305Algorithm()	Creates and registers the ChaCha20-Poly1305 AEAD algorithm with encryption/decryption capabilities for ChaCha20Poly1305Spec and VoidSpec defaults.

Method Summary

Methods inherited from class AbstractCryptoAlgorithm

capability

Methods inherited from class CryptoAlgorithm

addCapability, asymmetricKeyPairGenerator, bindContext, createContext, displayName, id, keyOperations, listCapabilities, parameterSets, 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

ChaCha20Poly1305Algorithm

public ChaCha20Poly1305Algorithm()

Creates and registers the ChaCha20-Poly1305 AEAD algorithm with encryption/decryption capabilities for ChaCha20Poly1305Spec and VoidSpec defaults.