OtpCryptoConfig class

Immutable, process-wide configuration for the OTP crypto protocol.

Constructors

OtpCryptoConfig.ephemeral({required Uint8List masterKey, Uint8List? salt, Uint8List? info, int protocolVersion = 1, int windowSeconds = 30, int verificationSkewWindows = 0, TimeProvider? timeProvider})
Creates a non-global, immutable config object (not assigned to singleton). Useful for unit tests that need multiple isolated configs at once.
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
hkdfInfo → Uint8List?
final
hkdfSalt → Uint8List?
final
masterKey → Uint8List
final
protocolVersion → int
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
timeProvider → TimeProvider
final
verificationSkewWindows → int
final
windowSeconds → int
final

Methods

acceptableWindows(int receivedWindow) → List<int>
Returns the list of acceptable windows for verification. Example: w=100, skew=1 => 99, 100, 101
currentWindow() → int
Returns the current time window using the configured TimeProvider.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
windowForEpochSeconds(int epochSeconds) → int
Computes the time window for a given epoch seconds using: window = floor(epochSeconds / windowSeconds)

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Properties

instance → OtpCryptoConfig
Retrieve the globally configured instance. Throws if initialize has not been called.
no setter
isInitialized → bool
True if the singleton was already initialized.
no setter

Static Methods

initialize({required Uint8List masterKey, Uint8List? salt, Uint8List? info, int protocolVersion = 1, int windowSeconds = 30, int verificationSkewWindows = 0, TimeProvider? timeProvider, bool forceReinitialize = false}) → OtpCryptoConfig
Initializes the global configuration (one-time).