SealedBox class abstract final

libsodium crypto_box_seal / crypto_box_seal_open (TSP Rev 3 §8.3).

nonce  = Blake2b-192(epk ‖ pk)
k      = HSalsa20(X25519(esk, pk), 0^16)
sealed = epk ‖ Poly1305 tag ‖ XSalsa20(pt)

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

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

Static Methods

open(Uint8List sealed, X25519KeyAgreement recipient) → Future<Uint8List>

Opens a sealed box with the recipient's key agreement capability.

seal(List<int> plaintext, List<int> recipientPublicKey, {List<int>? ephemeralSecretKey}) → Uint8List

Seals plaintext to recipientPublicKey.

Constants

overhead → const int

Bytes a sealed box adds to its plaintext.