AesCtr class

Implementação de AES-CTR (NIST SP 800-38A, modo de contador).

⚠️ CTR não é autenticado — considere AES-GCM para AEAD.

O initialCounterBlock é o bloco de contador inicial (16 bytes). Compatível com os vetores NIST que usam Inc128 (incrementa o bloco inteiro como inteiro big-endian de 128 bits).

final ctr = AesCtr(key: key32, initialCounterBlock: icb);
final payload = ctr.encrypt(dados);
final original = ctr.decrypt(payload);

Constructors

AesCtr({required Uint8List key, required Uint8List initialCounterBlock})

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

initialCounterBlock → Uint8List

Bloco de contador inicial — 16 bytes interpretados como uint128 big-endian.

final

key → Uint8List

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

decrypt(EncryptedPayload payload) → List<int>

Decifra payload e retorna o plaintext.

encrypt(List<int> plaintext) → EncryptedPayload

Cifra plaintext e retorna EncryptedPayload.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

counterBlockLength → const int